Sample records for traffic signal synchronization

  1. Seven Traffic Signals in Two Minutes

    Broader source: Energy.gov [DOE]

    Topeka, Kansas has activated the first of three key traffic corridors to receive a "green light tunnel," a real-time adaptive traffic signal system that synchronizes signals to create a series of...

  2. Seven Traffic Signals in Two Minutes

    SciTech Connect (OSTI)

    None

    2011-01-01T23:59:59.000Z

    Topeka, KS has activated the first of three key traffic corridors to receive a "green light tunnel," a real-time adaptive traffic signal system that synchronizes signals to create a series of green lights for motorists. The result is fewer stops, less travel time and -- most importantly -- a lot of saved gasoline.

  3. Performance Analysis of Isolated Intersection Traffic Signals

    E-Print Network [OSTI]

    Yin, Kai

    2013-08-01T23:59:59.000Z

    This dissertation analyzes two unsolved problems to fulfill the gap in the literature: (1). What is the vehicle delay and intersection capacity considering left-turn traffic at a pre-timed signal? (2). What are the mean and variance of delay...

  4. Traffic Synchronization and Management for Energy Savings 5-18...

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

    On the next slide you can see an example of a freeway arterial traffic simulation model. In this case it's a model of the I-580 corridor on the San Francisco Bay area,...

  5. LED traffic signals: A market transformation opportunity assessment

    SciTech Connect (OSTI)

    Suozzo, M.

    1998-12-31T23:59:59.000Z

    This report examines the feasibility and appropriateness of market intervention strategies to increase the penetration of LED traffic signals, which offer large energy savings and other benefits relative to existing incandescent traffic signals. It presents the state of the technology and some of the technical challenges that remain. Prepared for the Consortium for Energy Efficiency.

  6. Decentralized Traffic Management: A Synchronization-Based Intersection Control

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    the autonomous vehicle-agents to cross without stopping, i.e., in order to avoid congestions (delays) and energy by the vehicles while crossing the intersections, and the energy consumption due to the speed variations- portation systems. Autonomous vehicles are today considered as a promising approach to deal with traffic

  7. City of Phildelphia: Light emitting diodes for traffic signal displays

    SciTech Connect (OSTI)

    NONE

    1995-12-01T23:59:59.000Z

    This project investigated the feasibility of using light emitting diodes (LEDs) for red traffic signals in a demonstration program at 27 signalized intersections in the City of Philadelphia. LED traffic signals have the potential to achieve significant savings over standard incandescent signals in terms of energy usage and costs, signal relamping costs, signal system maintenance costs, tort liability, and environmental impact. Based on successful experience with the demonstration program, the City of Philadelphia is currently developing funding for the conversion of all existing red incandescent traffic signals at approximately 2,700 intersections to LED signals. This program is expected to cost approximately $4.0 million and save about $850,000 annually in energy costs. During late 1993 and early 1994, 212 red LED traffic signals (134 8-inch signals and 78 12-inch signals) were installed at 27 intersections in Philadelphia. The first group of 93 signals were installed at 13 prototypical intersections throughout the City. The remaining group of signals were installed on a contiguous route in West Philadelphia consisting of standard incandescent signals and LED signals interspersed in a random pattern.

  8. UNCORRECTED 2 Stochastic adaptive control model for traffic signal systems

    E-Print Network [OSTI]

    Detwiler, Russell

    UNCORRECTED PROOF 1 2 Stochastic adaptive control model for traffic signal systems 3 X.-H. Yu a,1 , W.W. Recker b,* 4 a Department of Electrical Engineering, California Polytechnic State University

  9. Evaluation of detector placement strategies for first generation traffic responsive signal control

    E-Print Network [OSTI]

    Brehmer, Christopher Lynn

    1996-01-01T23:59:59.000Z

    Traffic responsive signal systems rely on system detector data to evaluate current traffic conditions and select a corresponding timing plan from a library of plans. One of the major decisions surrounding the use of traffic responsive signal systems...

  10. Strategies for improving traffic operations at oversaturated signalized diamond interchanges

    E-Print Network [OSTI]

    Herrick, George Curtis

    1992-01-01T23:59:59.000Z

    street improvement goals should include improved traffic flow along with reductions in congestion, air pollution, and energy use, without major new construction. Super-street arterials, which are multi-lane arterials with limited access and a limited...STRATEGIES FOR IMPROVING TRAFFIC OPERATIONS AT OVERSATURATED SIGNALIZED DIAMOND INTERCHANGES A Thesis by GEORGE CURTIS HERRICK Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

  11. LED traffic lights: New technology signals major energy savings

    SciTech Connect (OSTI)

    Houghton, D.

    1994-12-31T23:59:59.000Z

    Using light-emitting diode technology to replace incandescent lamps in traffic signals promises energy savings upwards of 60 percent for each of the estimated quarter of a million controlled intersections in the United States. LED units use only 9 to 25 watts instead of the 67 to 150 watts used by each incandescent lamp. Though their first cost is relatively high, energy savings result in paybacks of 1 to 5 years. LED retrofit kits are available for red signal disks and arrows, and installations in several states have proven successful, although minor improvements are addressing concerns about varying light output and controller circuitry. Retrofitting green lamps is not yet feasible, because color standards of the Institute of Traffic Engineers cannot be met with existing LED technology. Yellow lamps have such low duty factors (they`re on only 3 percent of the time) that retrofitting with LED signals is not cost-effective. LEDs last much longer than incandescents, allowing municipalities to not only reduce their electricity bills, but to save on maintenance costs as well. As further incentive, some utilities are beginning to implement rebate programs for LED traffic signal retrofits. Full approval of LED units is still awaited from the Institute of Traffic Engineers (ITE), the standard-setting body for traffic safety devices. Local and state governments ultimately decide what specifications to require for traffic lights, and the growing body of successful field experience with LEDs appears to be raising their comfort level with the technology. The California Department of Transportation is developing an LED traffic light specification, and two California utilities, Southern California Edison and Pacific Gas and Electric, have provided rebates for some pilot installations.

  12. An operational analysis of flashing traffic signal operation

    E-Print Network [OSTI]

    Benz, Robert Joseph

    1993-01-01T23:59:59.000Z

    AN OPERATIONAL ANALYSIS OF FLASHING TRAFFIC SIGNAL OPERATION A Thesis by ROBERT JOSEPH BENZ Submitted to the Office of Graduate Studies of Texas AEcM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... street volumes are below 250 vph per approach and for main street volume of 500 vph per approach when the main/minor street volume ratio is above two. The volume range exceeds the Warrant 1 the minimum volume warrant for traffic signal installation...

  13. Evaluation of traffic signal controller transition methods

    E-Print Network [OSTI]

    Hamilton, Curtis Lloyd

    2000-01-01T23:59:59.000Z

    % capacity at the coordinated phase for the 30 minutes and at no volume for the remaining 5 minutes. The signal timing plans were fixed at a 120-second cycle length. The transition methods for each of the offset changes were tested to find the method...

  14. Bicycle-Specific Traffic Signals: Results from a State-of-the-Practice Review Paper # 13-0536

    E-Print Network [OSTI]

    Bicycle-Specific Traffic Signals: Results from a State-of-the-Practice Review Paper # 13-0536 Sam R with known installations of bicycle-specific traffic signals and a review of available engineering guidance); the CROW design manual for bicycle traffic; and the Canadian, U.S. and Californian manuals on uniform

  15. Bicycle-Specific Traffic Signals: Results from a State-of-the-Practice Review1 Paper # 13-05363

    E-Print Network [OSTI]

    Bertini, Robert L.

    Bicycle-Specific Traffic Signals: Results from a State-of-the-Practice Review1 2 Paper # 13-05363 4 with known installations of2 bicycle-specific traffic signals and a review of available engineering guidance Canada (TAC), the CROW design manual for bicycle traffic, and the Canadian, U.S. and Californian9 manuals

  16. area traffic signal control: Topics by E-print Network

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

    technology, are to increase the safety and through-put of the existing highway by traffic automation. Advanced Vehicle Control... Huandra, Rusli 1998-01-01 102 Evaluation of...

  17. Vehicle Traffic Control Signal Heads— Light Emitting Diode Circular Signal Supplement (VTCSH-LED). This replaced the so-called Interim LED Purchase Specifications,

    E-Print Network [OSTI]

    S. Behura

    Engineers ’ (ITE) specification for light-emitting diode (LED) circular traffic signals recently was updated (June 27, 2005) and published under the name

  18. OPERATIONAL GUIDANCE FOR BICYCLE-SPECIFIC TRAFFIC SIGNALS IN THE UNITED STATES: A REVIEW

    E-Print Network [OSTI]

    Bertini, Robert L.

    OPERATIONAL GUIDANCE FOR BICYCLE-SPECIFIC TRAFFIC SIGNALS IN THE UNITED STATES: A REVIEW Interim ........................................................................................................... 2 2.1.1 Guide for the Development of Bicycle Facilities (AASHTO, 1999).....................................................................................3 2.1.3 Guide for the Development of Bicycle Facilities (AASHTO, 2012

  19. Static scheduling of synchronous data flow programs for digital signal processing

    SciTech Connect (OSTI)

    Lee, E.A.; Messerschmitt, D.G.

    1987-01-01T23:59:59.000Z

    Large grain data flow (LGDF) programming is natural and convenient for describing digital signal processing (DSP) systems, but its runtime overhead is costly in real time or cost-sensitive applications. In some situations, designers are not willing to squander computing resources for the sake of programmer convenience. This is particularly true when the target machine is a programmable DSP chip. However, the runtime overhead inherent in most LGDF implementations is not required for most signal processing systems because such systems are mostly synchronous (in the DSP sense). Synchronous data flow (SDF) differs from traditional data flow in that the amount of data produced and consumed by a data flow node is specified a priori for each input and output. This is equivalent to specifying the relative sample rates in signal processing system. This means that the scheduling of SDF nodes need not be done at runtime, but can be done at compile time (statically), so the runtime overhead evaporates. The sample rates can all be different, which is not true of most current data-driven digital signal processing programming methodologies. Synchronous data flow is closely related to computation graphs, a special case of Petri nets. This self-contained paper develops the theory necessary to statically schedule SDF programs on single or multiple processors. A class of static (compile time) scheduling algorithms is proven valid, and specific algorithms are given for scheduling SDF systems onto single or multiple processors.

  20. Arterial-street signal timing strategies to provide additional through-traffic capacity during freeway incident conditions

    E-Print Network [OSTI]

    Dale, James Joseph

    1992-01-01T23:59:59.000Z

    relationships identified are likely to be common to other arterial-street sections with similar configurations and traffic patterns. ACKNOWLEDGMENTS This research was funded by Project No. 30, "Fuel Savings from Surveillance, Signing, and Signal Control... timing plan to accommodate diverted traffic from a freeway plays a significant role in the development of integrated freeway and arterial street control systems like the Automated Traffic Surveillance gnd control (ATSAC) system in Los Angeles (Rowe...

  1. An investigation into the use of highway traffic signals at highway-railroad grade crossings

    E-Print Network [OSTI]

    Frieslaar, Andre Henry

    1997-01-01T23:59:59.000Z

    2 Highway Speed Limit Classification 3 Light Condition Classification 4 Presence of Drunk Driver Classification 5 Driver Age Group Classification . . 43 50 52 57 LIST OF TABLES TABLE Page 1 Fatal Accidents Based on FARS Traffic Control... Device 2 Traffic Control Comparison between FARS and DOT/AAR Databases. . . 3 Fatal Accident Rates Based on DOT/AAR Traffic Control Device . 4 Driver Related Factor Results 5 FARS Variables Used in Analysis . 6 Driver Related Factor Classification...

  2. Preemption strategy for traffic signals at intersections near highway-railroad grade crossings

    E-Print Network [OSTI]

    Cho, Hanseon

    2004-09-30T23:59:59.000Z

    delay are given less consideration or ignored completely. Consequently, state-of-the-practice strategies may cause serious pedestrian safety and efficiency problems at IHRGCs. Therefore, there is a definite need for research on how to improve traffic...

  3. Rapid Prototyping for Digital Signal Processing Systems using Parameterized Synchronous Dataflow Graphs

    E-Print Network [OSTI]

    Bhattacharyya, Shuvra S.

    . Synchronous Dataflow (SDF), proposed in [2], is the first dataflow-based model of computation to gain broad optimization are developed in the context of SDF (e.g., see [3]). Although an important class of useful DSP applications can be modeled efficiently in SDF, the expressive power of SDF is restricted since SDF imposes

  4. E-Print Network 3.0 - actuated traffic signal controllers Sample...

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

    4 American Institute of Aeronautics and Astronautics Resonance-Enhanced High-Frequency Micro-Actuators with Summary: the piezoelectric actuators' control signal and the...

  5. A method to synchronize signals from multiple patient monitoring devices through a single input channel for inclusion in list-mode acquisitions

    SciTech Connect (OSTI)

    O’Connor, J. Michael; Pretorius, P. Hendrik; Johnson, Karen; King, Michael A., E-mail: Michael.King@umassmed.edu [Department of Radiology, University of Massachusetts Medical School, Worcester, Massachusetts 01655 (United States)

    2013-12-15T23:59:59.000Z

    Purpose: This technical note documents a method that the authors developed for combining a signal to synchronize a patient-monitoring device with a second physiological signal for inclusion into list-mode acquisition. Our specific application requires synchronizing an external patient motion-tracking system with a medical imaging system by multiplexing the tracking input with the ECG input. The authors believe that their methodology can be adapted for use in a variety of medical imaging modalities including single photon emission computed tomography (SPECT) and positron emission tomography (PET). Methods: The authors insert a unique pulse sequence into a single physiological input channel. This sequence is then recorded in the list-mode acquisition along with the R-wave pulse used for ECG gating. The specific form of our pulse sequence allows for recognition of the time point being synchronized even when portions of the pulse sequence are lost due to collisions with R-wave pulses. This was achieved by altering our software used in binning the list-mode data to recognize even a portion of our pulse sequence. Limitations on heart rates at which our pulse sequence could be reliably detected were investigated by simulating the mixing of the two signals as a function of heart rate and time point during the cardiac cycle at which our pulse sequence is mixed with the cardiac signal. Results: The authors have successfully achieved accurate temporal synchronization of our motion-tracking system with acquisition of SPECT projections used in 17 recent clinical research cases. In our simulation analysis the authors determined that synchronization to enable compensation for body and respiratory motion could be achieved for heart rates up to 125 beats-per-minute (bpm). Conclusions: Synchronization of list-mode acquisition with external patient monitoring devices such as those employed in motion-tracking can reliably be achieved using a simple method that can be implemented using minimal external hardware and software modification through a single input channel, while still recording cardiac gating signals.

  6. A novel method for the line-of-response and time-of-flight reconstruction in TOF-PET detectors based on a library of synchronized model signals

    E-Print Network [OSTI]

    P. Moskal; N. Zo?; T. Bednarski; P. Bia?as; E. Czerwi?ski; A. Gajos; D. Kami?ska; ?. Kap?on; A. Kochanowski; G. Korcyl; J. Kowal; P. Kowalski; T. Kozik; W. Krzemie?; E. Kubicz; Sz. Nied?wiecki; M. Pa?ka; L. Raczy?ski; Z. Rudy; O. Rundel; P. Salabura; N. G. Sharma; M. Silarski; A. S?omski; J. Smyrski; A. Strzelecki; A. Wieczorek; W. Wi?licki; M. Zieli?ski

    2015-02-10T23:59:59.000Z

    A novel method of hit time and hit position reconstruction in scintillator detectors is described. The method is based on comparison of detector signals with results stored in a library of synchronized model signals registered for a set of well-defined positions of scintillation points. The hit position is reconstructed as the one corresponding to the signal from the library which is most similar to the measurement signal. The time of the interaction is determined as a relative time between the measured signal and the most similar one in the library. A degree of similarity of measured and model signals is defined as the distance between points representing the measurement- and model-signal in the multi-dimensional measurement space. Novelty of the method lies also in the proposed way of synchronization of model signals enabling direct determination of the difference between time-of-flights (TOF) of annihilation quanta from the annihilation point to the detectors. The introduced method was validated using experimental data obtained by means of the double strip prototype of the J-PET detector and $^{22}$Na sodium isotope as a source of annihilation gamma quanta.The detector was built out from plastic scintillator strips with dimensions of 5 mm x 19 mm x 300 mm, optically connected at both sides to photomultipliers,from which signals were sampled by means of the Serial Data Analyzer.Using the introduced method, the spatial and TOF resolution of about 1.3 cm ($\\sigma$) and 125 ps ($\\sigma$) were established, respectively.

  7. Introducing Traffic Analysis Attacks, Defences and Public Policy Issues. . .

    E-Print Network [OSTI]

    Danezis, George

    Roots Traffic analysis is a key part of signal intelligence and electronic warfare. Michael Hermann, who

  8. Introducing Traffic Analysis George Danezis and Richard Clayton

    E-Print Network [OSTI]

    Danezis, George

    . 2 Military Roots Traffic analysis is a key component of signal intelligence and electronic warfare

  9. Determination of traffic responsive plan selection factors and thresholds using artificial neural networks

    E-Print Network [OSTI]

    Sharma, Anuj

    2004-11-15T23:59:59.000Z

    Traffic congestion has become a menace to civilized society. It degrades air quality, jeopardizes safety and causes delay. Traffic congestion can be alleviated by providing an effective traffic control signal system. Closed-loop traffic control...

  10. System and method for ultrafast optical signal detecting via a synchronously coupled anamorphic light pulse encoded laterally

    DOE Patents [OSTI]

    Heebner, John E. (Livermore, CA)

    2010-08-03T23:59:59.000Z

    In one general embodiment, a method for ultrafast optical signal detecting is provided. In operation, a first optical input signal is propagated through a first wave guiding layer of a waveguide. Additionally, a second optical input signal is propagated through a second wave guiding layer of the waveguide. Furthermore, an optical control signal is applied to a top of the waveguide, the optical control signal being oriented diagonally relative to the top of the waveguide such that the application is used to influence at least a portion of the first optical input signal propagating through the first wave guiding layer of the waveguide. In addition, the first and the second optical input signals output from the waveguide are combined. Further, the combined optical signals output from the waveguide are detected. In another general embodiment, a system for ultrafast optical signal recording is provided comprising a waveguide including a plurality of wave guiding layers, an optical control source positioned to propagate an optical control signal towards the waveguide in a diagonal orientation relative to a top of the waveguide, at least one optical input source positioned to input an optical input signal into at least a first and a second wave guiding layer of the waveguide, and a detector for detecting at least one interference pattern output from the waveguide, where at least one of the interference patterns results from a combination of the optical input signals input into the first and the second wave guiding layer. Furthermore, propagation of the optical control signal is used to influence at least a portion of the optical input signal propagating through the first wave guiding layer of the waveguide.

  11. 2007 IEEE International Conference on Signal Processing and Communications (ICSPC 2007), 24-27 November 2007, Dubai, United Arab Emirates A MODLE FOR CONTROLLED VBR VIDEO TRAFFIC

    E-Print Network [OSTI]

    Gabbouj, Moncef

    -27 November 2007, Dubai, United Arab Emirates A MODLE FOR CONTROLLED VBR VIDEO TRAFFIC Mehdi Rezaei, 2Imed

  12. Synchronized operation by field programmable gate array based signal controller for the Thomson scattering diagnostic system in KSTAR

    SciTech Connect (OSTI)

    Lee, W. R.; Park, M. K.; Lee, J. H. [National Fusion Research Institute, Gwahangno 113, Daejeon 305-333 (Korea, Republic of); Kim, H. S. [Chungnam National University, Daehak-ro 99, Daejeon 305-764 (Korea, Republic of); Kim, K. H. [Seed Core Co., Ltd., Daehak-ro 99, Daejeon 305-764 (Korea, Republic of)

    2012-09-15T23:59:59.000Z

    The Thomson scattering diagnostic system is successfully installed in the Korea Superconducting Tokamak Advanced Research (KSTAR) facility. We got the electron temperature and electron density data for the first time in 2011, 4th campaign using a field programmable gate array (FPGA) based signal control board. It operates as a signal generator, a detector, a controller, and a time measuring device. This board produces two configurable trigger pulses to operate Nd:YAG laser system and receives a laser beam detection signal from a photodiode detector. It allows a trigger pulse to be delivered to a time delay module to make a scattered signal measurement, measuring an asynchronous time value between the KSTAR timing board and the laser system injection signal. All functions are controlled by the embedded processor running on operating system within a single FPGA. It provides Ethernet communication interface and is configured with standard middleware to integrate with KSTAR. This controller has operated for two experimental campaigns including commissioning and performed the reconfiguration of logic designs to accommodate varying experimental situation without hardware rebuilding.

  13. Traffic culture human factors & traffic safety

    E-Print Network [OSTI]

    Karlsson, Brynjar

    Traffic culture human factors & traffic safety by Dr.-Ing. Haraldur Sigþórsson and Dr.-Ing. Stefán) Culture, traffic culture and traffic safety culture are interrelated Culture www.hr.is 3 Traffic Culture Traffic safety culture What is culture? · A culture is a collection of behavioral patterns that are found

  14. LED Traffic Lights Get Buy American Stamp | Department of Energy

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

    Traffic Lights Get Buy American Stamp November 30, 2010 - 10:19am Addthis Red. Yellow. Green. What LED traffic signals don't say: Made in USA. That is changing. Dialight...

  15. Digital-data receiver synchronization

    DOE Patents [OSTI]

    Smith, Stephen F.; Turner, Gary W.

    2005-08-02T23:59:59.000Z

    Digital-data receiver synchronization is provided with composite phase-frequency detectors, mutually cross-connected comparison feedback or both to provide robust reception of digital data signals. A single master clock can be used to provide frequency signals. Advantages can include fast lock-up time in moderately to severely noisy conditions, greater tolerance to noise and jitter when locked, and improved tolerance to clock asymmetries.

  16. VEHICLE EMISSIONS AND TRAFFIC MEASURES: EXPLORATORY ANALYSIS OF FIELD

    E-Print Network [OSTI]

    Frey, H. Christopher

    VEHICLE EMISSIONS AND TRAFFIC MEASURES: EXPLORATORY ANALYSIS OF FIELD OBSERVATIONS AT SIGNALIZED between vehicle emissions and traffic control measures is an important step toward reducing the potential roadway design and traffic control, have the ability to reduce vehicle emissions. However, current vehicle

  17. On chip synchronization for optical OPPM

    E-Print Network [OSTI]

    Hayek, Khalil F.

    2012-06-07T23:59:59.000Z

    the autocorrclation and spectrum of the output of a photodiode photodetector for Q-ary VVM and showed the necessity for nonlinear preprocessing to obtain a synchronizable signal which can then be locked on to by a phase-locked loop; in addition, they studied the ef...Fect of imperfect synchronization on system performance. Slot synchronization for avalanche photodiode (APD) receivers was considered by Davidson and Sun [7]. Synchronization was achieved by using a transition detector followed by a pulse shaper to provide input...

  18. Synchronization System for Next Generation Light Sources

    SciTech Connect (OSTI)

    Zavriyev, Anton

    2014-03-27T23:59:59.000Z

    An alternative synchronization technique – one that would allow explicit control of the pulse train including its repetition rate and delay is clearly desired. We propose such a scheme. Our method is based on optical interferometry and permits synchronization of the pulse trains generated by two independent mode-locked lasers. As the next generation x-ray sources will be driven by a clock signal derived from a mode-locked optical source, our technique will provide a way to synchronize x-ray probe with the optical pump pulses.

  19. Fermilab | Traffic Safety at Fermilab |

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

    Submit a SuggestionQuestion Fermilab traffic rules (FESHM 9010) Fermilab traffic accident statistics Traffic safety awareness training Resources Texting While Driving...

  20. Evaluation of teenage driver understanding of traffic control devices

    E-Print Network [OSTI]

    Ford, Garry Lee

    2012-06-07T23:59:59.000Z

    . . Signals Continually Misunderstood Traffic Control Devices . . Before and After Results 52 54 55 55 57 . 60 . . 65 . 72 81 81 . 83 . 84 . . 85 . . 87 TABLE OF CONTENTS (Continued) CHAPTER Page V CONCLUSIONS AND RECOMMENDATIONS, , . . 88... Misunderstood from 1978 TTI Study 12 4 Traffic Control Devices Needing Improvements from 1981 TTI Study . . . . . . 13 5 Targeted Traffic Control Devices from 1990 TTI Study . . 6 Basic Shapes and Colors Included in the Final Survey . . . 7 Regulatory Signs...

  1. E-Print Network 3.0 - automated signal processing Sample Search...

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

    , Ahmed Abdel-Rahim b,1 Summary: in CIDScript language. 8.2. Traffic signal controller troubleshooting The CID automated test tool allows... Design of traffic controller...

  2. Signal optimization at isolated intersections using pre-signals

    E-Print Network [OSTI]

    Palekar, Trishul Ajit

    2006-10-30T23:59:59.000Z

    INTRODUCTION Traffic at signalized intersections exhibits complex vehicle interactions, which tends to have a significant impact on traffic operations. Frustration at signalized intersections or ?stop light? as it is commonly called, often runs high... at signalized intersections in order to quantify the inefficiencies in signal operations. BACKGROUND Queue discharge plays an important role in signal operation. At the onset of green indication, the first few vehicles experience start up loss time due...

  3. Development of an actuated traffic control process utilizing real-time estimated volume feedbback

    E-Print Network [OSTI]

    Pacelli, Michael Joseph

    1999-01-01T23:59:59.000Z

    state of the system in the same units. The goal of this research was to develop an actuated traffic control process that could use estimated volumes in order to optimally operate the traffic signal in real- time in response to actual traffic demands...

  4. Traffic Management Specialist

    Broader source: Energy.gov [DOE]

    The incumbent in this position will serve as a Traffic Management Specialist for BPAs Transmission Business Line (TBL) and oversee commercial transportation services for the movement of materials...

  5. Advanced synchronous luminescence system

    DOE Patents [OSTI]

    Vo-Dinh, Tuan (Knoxville, TN)

    1997-01-01T23:59:59.000Z

    A method and apparatus for determining the condition of tissue or otherwise making chemical identifications includes exposing the sample to a light source, and using a synchronous luminescence system to produce a spectrum that can be analyzed for tissue condition.

  6. Synchronization of Limit Sets

    E-Print Network [OSTI]

    Changpin Li; Weihua Deng

    2005-10-10T23:59:59.000Z

    In this Letter, we derive a sufficient condition of synchronizing limit sets (attractors and repellers) by using the linear feedback control technique proposed here. There examples are included. The numerical simulations and computer graphics show that our method work well.

  7. Synchronization in complex networks

    SciTech Connect (OSTI)

    Arenas, A.; Diaz-Guilera, A.; Moreno, Y.; Zhou, C.; Kurths, J.

    2007-12-12T23:59:59.000Z

    Synchronization processes in populations of locally interacting elements are in the focus of intense research in physical, biological, chemical, technological and social systems. The many efforts devoted to understand synchronization phenomena in natural systems take now advantage of the recent theory of complex networks. In this review, we report the advances in the comprehension of synchronization phenomena when oscillating elements are constrained to interact in a complex network topology. We also overview the new emergent features coming out from the interplay between the structure and the function of the underlying pattern of connections. Extensive numerical work as well as analytical approaches to the problem are presented. Finally, we review several applications of synchronization in complex networks to different disciplines: biological systems and neuroscience, engineering and computer science, and economy and social sciences.

  8. Hybrid Traffic Data Collection Roadmap: Pilot Procurement of Third-Party Traffic Data

    E-Print Network [OSTI]

    Alexandre, Bayen

    2013-01-01T23:59:59.000Z

    Traffic Management Systems PROBE DATA QUALITY VISUALIZATIONin Traffic Management Systems EXTEND PROBE DATA QUALITYquality, accuracy, and availability of traffic data Traffic system management

  9. A multichannel, synchronous laser signal processing system

    E-Print Network [OSTI]

    Hulse, William Colbern

    2012-06-07T23:59:59.000Z

    . Janice Carter and Mrs. Connie Schilhab, This research was funded by the United States Coast Guard under contract DOT- CG-34017-A. To Roselyn TABLE OF CONTENTS ~hh h ABSTRACT ACKNOWLEDGEMENTS DEDICATION TABLE OF CONTENTS. LIST OF FIGURES. LIST... Pe Q Q pe Qe @Qe Qe Qe Qe p? pe p, Qe 100 200 300 400 Turbidity (FTU) 500 600 700 Figure 1-1. Lidar Depolarization Ratio as a Function of Turbidity Chopper Linear Pol Laser Receiving Optics Telephoto Lense Pho odiod s Figure I...

  10. Scheduling Techniques for Synchronous and Multidimensional Synchro-nous Dataflow

    E-Print Network [OSTI]

    techniques for programs expressed as Synchronous Dataflow (SDF) and Multidimensional Synchronous dataflow-time constraints. Multidimensional Synchronous Dataflow (MDSDF) is an extension of SDF to multiple dimensions spaces, are more naturally modeled and specified than in SDF. The amount of on-chip memory available

  11. Power Supply Synchronization without Communication

    E-Print Network [OSTI]

    Moehlis, Jeff

    1 Power Supply Synchronization without Communication Leonardo A. B. T^orres, Jo~ao P. Hespanha, Jeff Moehlis Abstract--We consider the synchronization of power supplies in an isolated grid with multiple small-to-medium power sources. We show how to achieve a coordinated or synchronized behavior

  12. Advanced synchronous luminescence system

    DOE Patents [OSTI]

    Vo-Dinh, T.

    1997-02-04T23:59:59.000Z

    A method and apparatus are disclosed for determining the condition of tissue or otherwise making chemical identifications includes exposing the sample to a light source, and using a synchronous luminescence system to produce a spectrum that can be analyzed for tissue condition. 14 figs.

  13. LUNAR SOIL SIMULATION TRAFFICABILITY PARAMETERS

    E-Print Network [OSTI]

    Rathbun, Julie A.

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

  14. Synchronized sampling improves fault location

    SciTech Connect (OSTI)

    Kezunovic, M. [Texas A and M Univ., College Station, TX (United States)] [Texas A and M Univ., College Station, TX (United States); Perunicic, B. [Lamar Univ., Beaumont, TX (United States)] [Lamar Univ., Beaumont, TX (United States)

    1995-04-01T23:59:59.000Z

    Transmission line faults must be located accurately to allow maintenance crews to arrive at the scene and repair the faulted section as soon as possible. Rugged terrain and geographical layout cause some sections of power transmission lines to be difficult to reach. In the past, a variety of fault location algorithms were introduced as either an add-on feature in protective relays or stand-alone implementation in fault locators. In both cases, the measurements of current and voltages were taken at one terminal of a transmission line only. Under such conditions, it may become difficult to determine the fault location accurately, since data from other transmission line ends are required for more precise computations. In the absence of data from the other end, existing algorithms have accuracy problems under several circumstances, such as varying switching and loading conditions, fault infeed from the other end, and random value of fault resistance. Most of the one-end algorithms were based on estimation of voltage and current phasors. The need to estimate phasors introduces additional difficulty in high-speed tripping situations where the algorithms may not be fast enough in determining fault location accurately before the current signals disappear due to the relay operation and breaker opening. This article introduces a unique concept of high-speed fault location that can be implemented either as a simple add-on to the digital fault recorders (DFRs) or as a stand-alone new relaying function. This advanced concept is based on the use of voltage and current samples that are synchronously taken at both ends of a transmission line. This sampling technique can be made readily available in some new DFR designs incorporating receivers for accurate sampling clock synchronization using the satellite Global Positioning System (GPS).

  15. An evaluation of the operating effectiveness of a computer-controlled traffic network

    E-Print Network [OSTI]

    De Steiguer, Allen Louis

    1969-01-01T23:59:59.000Z

    on relationships whith neazby detected links and known patterns of traffic movement control. iv Acknowled ements I wish to express my gratitide to those people wi. thout whose assistance this thesis would not have seen the light of day. My deepest... system of traffic control and to compare it to several conventional types of traffic signal control; * To evaluate various detector configurations for computer- controlled networks to determine the effects of different levels of detection intensity...

  16. Global synchronization of parallel processors using clock pulse width modulation

    DOE Patents [OSTI]

    Chen, Dong; Ellavsky, Matthew R.; Franke, Ross L.; Gara, Alan; Gooding, Thomas M.; Haring, Rudolf A.; Jeanson, Mark J.; Kopcsay, Gerard V.; Liebsch, Thomas A.; Littrell, Daniel; Ohmacht, Martin; Reed, Don D.; Schenck, Brandon E.; Swetz, Richard A.

    2013-04-02T23:59:59.000Z

    A circuit generates a global clock signal with a pulse width modification to synchronize processors in a parallel computing system. The circuit may include a hardware module and a clock splitter. The hardware module may generate a clock signal and performs a pulse width modification on the clock signal. The pulse width modification changes a pulse width within a clock period in the clock signal. The clock splitter may distribute the pulse width modified clock signal to a plurality of processors in the parallel computing system.

  17. Optimum Frame Synchronization for Preamble-less Packet Transmission of Turbo Codes

    E-Print Network [OSTI]

    Valenti, Matthew C.

    Optimum Frame Synchronization for Preamble-less Packet Transmission of Turbo Codes Jian Sun introduces an optimum maximum a posteriori (MAP) frame synchronization method for packet- based turbo coded the received signal sequences. This method is based on the low- density parity-check properties of turbo codes

  18. On Improving the Intelligibility of Synchronized Over-lap-and-Add (SOLA) at Low TSM Factor

    E-Print Network [OSTI]

    Wong, Peter Hon-Wah

    On Improving the Intelligibility of Synchronized Over- lap-and-Add (SOLA) at Low TSM Factor Peter H-7053** ABSTRACT In this paper, we propose an algorithm to modify the Synchronized Overlap-and-Add (SOLA) technique. SOLA is a popular technique for time scale modification of speech and audio signal. It changes the time

  19. adaptive signal model: Topics by E-print Network

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

    Michael Richard 1990-11-13 2 UNCORRECTED 2 Stochastic adaptive control model for traffic signal systems Environmental Sciences and Ecology Websites Summary: process. The model...

  20. Digital-data receiver synchronization method and apparatus

    DOE Patents [OSTI]

    Smith, Stephen F. (Loudon, TN) [Loudon, TN; Turner, Gary W. (Clinton, TN) [Clinton, TN

    2009-09-08T23:59:59.000Z

    Digital data receiver synchronization is provided with composite phase-frequency detectors, mutually cross-connected comparison feedback or both to provide robust reception of digital data signals. A single master clock can be used to provide frequency signals. Advantages can include fast lock-up time in moderately to severely noisy conditions, greater tolerance to noise and jitter when locked, and improved tolerance to clock asymmetries.

  1. Digital-data receiver synchronization method and apparatus

    DOE Patents [OSTI]

    Smith, Stephen F.; Turner, Gary W.

    2005-12-06T23:59:59.000Z

    Digital-data receiver synchronization is provided with composite phase-frequency detectors, mutually cross-connected comparison feedback or both to provide robust reception of digital data signals. A single master clock may be used to provide frequency signals. Advantages can include fast lock-up time in moderately to severely noisy conditions, greater tolerance to noise and jitter when locked, and improved tolerance to clock asymmetries.

  2. Communication using Synchronized Chaotic Systems

    E-Print Network [OSTI]

    Anlage, Steven

    Communication using Synchronized Chaotic Systems Rachel Kramer Adam Cohen Bhargava Ravoori Thomas E attention for uses in secure CommunicationIntroduction Adaptive Synchronization The phenomenon sequence is transmitted over a time-varying communication channel. We examine cases with and without

  3. Real-Time Traffic Maps

    E-Print Network [OSTI]

    Goldsberry, Kirk Patrick

    2007-01-01T23:59:59.000Z

    d. (2007). Barcelona Traffic Map. Barcelona. 2007. Berendt,Spatial Thinking with Geographic Maps: An Empirical Study.Data on Choropleth Maps in Series." Annals of the

  4. Evaluation of traffic operations at diamond interchanges using advanced actuated control

    E-Print Network [OSTI]

    Koonce, Peter John Vincent

    1998-01-01T23:59:59.000Z

    This thesis documents an operational analysis of ographics. advanced actuated traffic control at signalized diamond interchanges. The study attempts to determine the benefits a "flexible'' phasing strategy provides to the interchange. Flexible...

  5. Enforcing Liveness in Autonomous Traffic Management Tsz-Chiu Au

    E-Print Network [OSTI]

    Au, Tsz-Chiu

    - section Management (AIM). They showed that by leveraging the capacities of autonomous vehicles a First Come, First Served (FCFS) policy to direct autonomous vehicles through an intersection traditional traffic signals and stop signs, resulting in fuel savings since vehicles are less likely to stop

  6. Artificial Immune System based urban traffic control

    E-Print Network [OSTI]

    Negi, Pallav

    2007-09-17T23:59:59.000Z

    traffic. The traffic was micro-simulated with each car on a two junction road system modeled individually. The cars themselves were programmed with 'personalities' to better simulate real traffic. A novel AIS was developed to detect, predict, and control...

  7. Explosive Synchronization is Discontinuous

    E-Print Network [OSTI]

    Vladimir Vlasov; Yong Zou; Tiago Pereira

    2014-11-25T23:59:59.000Z

    Spontaneous explosive is an abrupt transition to collective behavior taking place in heterogeneous networks when the frequencies of the nodes are positively correlated to the node degree. This explosive transition was conjectured to be discontinuous. Indeed, numerical investigations reveal a hysteresis behavior associated with the transition. Here, we analyze explosive synchronization in star graphs. We show that in the thermodynamic limit the transition to (and out) collective behavior is indeed discontinuous. The discontinuous nature of the transition is related to the nonlinear behavior of the order parameter, which in the thermodynamic limit exhibits multiple fixed points. Moreover, we unravel the hysteresis behavior in terms of the graph parameters. Our numerical results show that finite size graphs are well described by our predictions.

  8. Experiment on ATM traffic analysis

    E-Print Network [OSTI]

    Liang, Chai

    1997-01-01T23:59:59.000Z

    efficiently utilizing the underlying network resources, one must have some proper methods to analyze the performance of the ATM network. In this thesis, we studied the traffic characteristics in the ATM networks and the traffic modeling. To do this, we used...

  9. Chaos Pass Filter: Linear Response of Synchronized Chaotic Systems

    E-Print Network [OSTI]

    Steffen Zeeb; Johannes Kestler; Ido Kanter; Wolfgang Kinzel

    2013-01-29T23:59:59.000Z

    The linear response of synchronized time-delayed chaotic systems to small external perturbations, i.e., the phenomenon of chaos pass filter, is investigated for iterated maps. The distribution of distances, i.e., the deviations between two synchronized chaotic units due to external perturbations on the transfered signal, is used as a measure of the linear response. It is calculated numerically and, for some special cases, analytically. Depending on the model parameters this distribution has power law tails in the region of synchronization leading to diverging moments of distances. This is a consequence of multiplicative and additive noise in the corresponding linear equations due to chaos and external perturbations. The linear response can also be quantified by the bit error rate of a transmitted binary message which perturbs the synchronized system. The bit error rate is given by an integral over the distribution of distances and is calculated analytically and numerically. It displays a complex nonmonotonic behavior in the region of synchronization. For special cases the distribution of distances has a fractal structure leading to a devil's staircase for the bit error rate as a function of coupling strength. The response to small harmonic perturbations shows resonances related to coupling and feedback delay times. A bi-directionally coupled chain of three units can completely filtered out the perturbation. Thus the second moment and the bit error rate become zero.

  10. 430 IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS, VOL. 5, NO. 5, OCTOBER 2011 Phase-Synchronization Early Epileptic Seizure

    E-Print Network [OSTI]

    Genov, Roman

    -Synchronization Early Epileptic Seizure Detector VLSI Architecture Karim Abdelhalim, Student Member, IEEE, Vadim Smolyakov, Student Member, IEEE, and Roman Genov, Senior Member, IEEE Abstract--A low-power VLSI processor architecture that com- putes in real time the magnitude and phase-synchronization of two input neural signals

  11. A synchronous bus multimicroprocessor

    E-Print Network [OSTI]

    Wilson, Michael Ramsey

    2012-06-07T23:59:59.000Z

    of the Z-BO. When the Z-80 acknowledges the interrupt by asserting /Ml and /IORO, the interrupt flip-flop is reset. The processor will operate in interrupt mode I in which it executes a restart to location 0038H to begin the interrupt service routine.... To determine if the real-time clock interrupt occurred, the processor may read the status of that signal at I/O port 40H. This signal is not latched but is of sufficient duration that the Z-80 will respond before it is negated. The interrupt from the I...

  12. A FLEXIBLE MODEL FOR TRAFFIC SIMULATION AND

    E-Print Network [OSTI]

    Sanner, Scott

    accurate prediction of macroscopic traffic flows (in con- sistent with kinematic wave theory) under all

  13. Scalability of dynamic traffic assignment

    E-Print Network [OSTI]

    Wen, Yang, Ph. D. Massachusetts Institute of Technology

    2009-01-01T23:59:59.000Z

    This research develops a systematic approach to analyze the computational performance of Dynamic Traffic Assignment (DTA) models and provides solution techniques to improve their scalability for on-line applications for ...

  14. LED Traffic Light as a Communications Device Grantham Pang, Thomas Kwan, Chi-Ho Chan, Hugh Liu.

    E-Print Network [OSTI]

    Pang, Grantham

    :http://www.eee.hku.hk/~gpang Abstract The visible light from an LED (light emitting diode) traffic light can be modulated and encoded on the description of an audio information system made up of high brightness, visible light emitting diodes (LEDs messages 1. Introduction Recently, high intensity light emitting diodes for traffic signals are available

  15. Minimizing Wheel Slip in Railway Locomotives with Coupled Permanent Magnet Synchronous Motors

    E-Print Network [OSTI]

    Shayak Bhattacharjee

    2015-01-17T23:59:59.000Z

    In this work I consider control strategies of permanent magnet synchronous motors in which the back-emf signal from the motor is used to achieve commutation of the six step driving circuit. I show that if the strategy is modified to connect multiple motors in a cyclic chain, then a collective synchronized state is favoured. The stability of this state can be exploited in the bogies of a railway locomotive to automatically terminate wheel slipping episodes.

  16. Synchronization in an Optomechanical Cavity

    E-Print Network [OSTI]

    Keren Shlomi; D. Yuvaraj; Ilya Baskin; Oren Suchoi; Roni Winik; Eyal Buks

    2014-10-01T23:59:59.000Z

    We study self-excited oscillations (SEO) in an on-fiber optomechanical cavity. Synchronization is observed when the optical power that is injected into the cavity is periodically modulated. A theoretical analysis based on the Fokker-Planck equation evaluates the expected phase space distribution (PSD) of the self-oscillating mechanical resonator. A tomography technique is employed for extracting PSD from the measured reflected optical power. Time-resolved state tomography measurements are performed to study phase diffusion and phase locking of the SEO. The detuning region inside which synchronization occurs is experimentally determined and the results are compared with the theoretical prediction.

  17. E-Print Network 3.0 - arrows signals Sample Search Results

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

    Biology and Medicine ; Environmental Management and Restoration Technologies 47 LIGHT EMITTING DIODE (LED) TRAFFIC SIGNAL SURVEY RESULTS Summary: CALIFORNIA ENERGY COMMISSION LIGHT...

  18. Fermi Timing and Synchronization System

    SciTech Connect (OSTI)

    Wilcox, R.; Staples, J.; Doolittle, L.; Byrd, J.; Ratti, A.; Kaertner, F.X.; Kim, J.; Chen, J.; Ilday, F.O.; Ludwig, F.; Winter, A.; Ferianis, M.; Danailov, M.; D'Auria, G.

    2006-07-19T23:59:59.000Z

    The Fermi FEL will depend critically on precise timing of its RF, laser and diagnostic subsystems. The timing subsystem to coordinate these functions will need to reliably maintain sub-100fs synchronicity between distant points up to 300m apart in the Fermi facility. The technology to do this is not commercially available, and has not been experimentally demonstrated in a working facility. Therefore, new technology must be developed to meet these needs. Two approaches have been researched by different groups working with the Fermi staff. At MIT, a pulse transmission scheme has been developed for synchronization of RF and laser devices. And at LBL, a CW transmission scheme has been developed for RF and laser synchronization. These respective schemes have advantages and disadvantages that will become better understood in coming years. This document presents the work done by both teams, and suggests a possible system design which integrates them both. The integrated system design provides an example of how choices can be made between the different approaches without significantly changing the basic infrastructure of the system. Overall system issues common to any synchronization scheme are also discussed.

  19. Division of IT Convergence Engineering Datacenter Traffic Monitoring

    E-Print Network [OSTI]

    Boutaba, Raouf

    Division of IT Convergence Engineering Datacenter Traffic Monitoring Using Traffic Mirroring, Korea 3 School of Computer Science, University of Waterloo, Canada In these days, datacenter traffic has been increased rapidly. Monitoring datacenter traffic is more difficult than conventional Internet

  20. Traffic tolerance and recovery of bermudagrass

    E-Print Network [OSTI]

    Robinson, William Dustan

    2005-08-29T23:59:59.000Z

    fertility regimes. Research is needed to determine the influence of bermudagrass cultivar, mowing regime, and nitrogen fertility on traffic tolerance. Research conducted at Texas A&M Univeristy studied the traffic tolerance of Tifsport, GN-1, Princess...

  1. Hub Synchronization in Scale-Free Networks

    E-Print Network [OSTI]

    Tiago Pereira

    2010-10-07T23:59:59.000Z

    Heterogeneity in the degree distribution is known to suppress global synchronization in complex networks of symmetrically coupled oscillators. Scale-free networks display a great deal of heterogeneity, containing a few nodes, termed hubs, that are highly connected, while most nodes receive only a few connections. Here, we show that a group of synchronized nodes may appear in scale-free networks: hubs undergo a transition to synchronization while the other nodes remain unsynchronized. This general phenomenon can occur even in the absence of global synchronization. Our results suggest that scale-free networks may have evolved to complement various levels of synchronization.

  2. DATALITE: a Distributed Architecture for Traffic Analysis via Light-weight Traffic Digest

    E-Print Network [OSTI]

    Chao, Jonathan

    DATALITE: a Distributed Architecture for Traffic Analysis via Light-weight Traffic Digest for Traffic Analysis via LIght- weight Traffic digEst, which introduces a set of new distributed algorithms digests (TD's) amongst the network nodes. A TD for N packets only requires O(loglog N) bits of memory

  3. FAA Air Traffic Organization Safety Management

    Broader source: Energy.gov [DOE]

    Presenter: Mark DeNicuolo, Manager Performance and Analyses Air Traffic Organization Safety and Technical Training Federal Aviation Administration

  4. Traffic Management System Performance November 11, 2002

    E-Print Network [OSTI]

    Levinson, David M.

    Traffic Management System Performance November 11, 2002 David Levinson1 Wei Chen2 Department uses regression analysis to evaluate long-run traffic management system performance. Three important traffic management systems in the Twin Cities metro area - Ramp Metering, Variable Message Signs (VMS

  5. Optical synchronization system for femtosecond X-ray sources

    DOE Patents [OSTI]

    Wilcox, Russell B. (El Cerrito, CA); Holzwarth, Ronald (Munich, DE)

    2011-12-13T23:59:59.000Z

    Femtosecond pump/probe experiments using short X-Ray and optical pulses require precise synchronization between 100 meter-10 km separated lasers in a various experiments. For stabilization in the hundred femtosecond range a CW laser is amplitude modulated at 1-10 GHz, the signal retroreflected from the far end, and the relative phase used to correct the transit time with various implementations. For the sub-10 fsec range the laser frequency itself is upshifted 55 MHz with an acousto-optical modulator, retroreflected, upshifted again and phase compared at the sending end to a 110 MHz reference. Initial experiments indicate less than 1 fsec timing jitter. To lock lasers in the sub-10 fs range two single-frequency lasers separated by several teraHertz will be lock to a master modelocked fiber laser, transmit the two frequencies over fiber, and lock two comb lines of a slave laser to these frequencies, thus synchronizing the two modelocked laser envelopes.

  6. Adaptive vibration control using synchronous demodulation with machine tool controller motor commutation

    DOE Patents [OSTI]

    Hopkins, David James (Livermore, CA)

    2008-05-13T23:59:59.000Z

    A control system and method for actively reducing vibration in a spindle housing caused by unbalance forces on a rotating spindle, by measuring the force-induced spindle-housing motion, determining control signals based on synchronous demodulation, and provide compensation for the measured displacement to cancel or otherwise reduce or attenuate the vibration. In particular, the synchronous demodulation technique is performed to recover a measured spindle housing displacement signal related only to the rotation of a machine tool spindle, and consequently rejects measured displacement not related to spindle motion or synchronous to a cycle of revolution. Furthermore, the controller actuates at least one voice-coil (VC) motor, to cancel the original force-induced motion, and adapts the magnitude of voice coil signal until this measured displacement signal is brought to a null. In order to adjust the signal to a null, it must have the correct phase relative to the spindle angle. The feedback phase signal is used to adjust a common (to both outputs) commutation offset register (offset relative to spindle encoder angle) to force the feedback phase signal output to a null. Once both of these feedback signals are null, the system is compensating properly for the spindle-induced motion.

  7. In Florida, the bicycle is legally defined as a vehicle. Bicyclists have the same rights to the roadways, and must obey the same traffic laws

    E-Print Network [OSTI]

    Slatton, Clint

    In Florida, the bicycle is legally defined as a vehicle. Bicyclists have the same rights for this respect. TRAFFIC LAW HIGHLIGHTS Bicycle Regulations [316.2065, F.S.] · A bicyclist must obey all traffic controls and signals. · A bicyclist must use a fixed, regular seat for riding. · No bicycle may be used

  8. Synchronization Difficulties Between Traditional Faculty and

    E-Print Network [OSTI]

    Henderson, Charles

    at the AAPT Summer Meeting, August 9, 2005, Salt Lake City, UT 3 Abstract To identify barriersSynchronization Difficulties Between Traditional Faculty and Education Researchers Charles

  9. Spectral Clustering of Synchronous Spike Trains 1 Spectral Clustering of Synchronous

    E-Print Network [OSTI]

    Paiva, António R. C.

    Spectral Clustering of Synchronous Spike Trains 1 Spectral Clustering of Synchronous Spike Trains, University of Florida #12;Spectral Clustering of Synchronous Spike Trains 2 Outline Introduction Distance between two spike trains Clustering algorithm Results António Paiva, Sudhir Rao, Il Park and José Príncipe

  10. Method and apparatus to debug an integrated circuit chip via synchronous clock stop and scan

    DOE Patents [OSTI]

    Bellofatto, Ralph E. (Ridgefield, CT); Ellavsky, Matthew R. (Rochester, MN); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Gooding, Thomas M. (Rochester, MN); Haring, Rudolf A. (Cortlandt Manor, NY); Hehenberger, Lance G. (Leander, TX); Ohmacht, Martin (Yorktown Heights, NY)

    2012-03-20T23:59:59.000Z

    An apparatus and method for evaluating a state of an electronic or integrated circuit (IC), each IC including one or more processor elements for controlling operations of IC sub-units, and each the IC supporting multiple frequency clock domains. The method comprises: generating a synchronized set of enable signals in correspondence with one or more IC sub-units for starting operation of one or more IC sub-units according to a determined timing configuration; counting, in response to one signal of the synchronized set of enable signals, a number of main processor IC clock cycles; and, upon attaining a desired clock cycle number, generating a stop signal for each unique frequency clock domain to synchronously stop a functional clock for each respective frequency clock domain; and, upon synchronously stopping all on-chip functional clocks on all frequency clock domains in a deterministic fashion, scanning out data values at a desired IC chip state. The apparatus and methodology enables construction of a cycle-by-cycle view of any part of the state of a running IC chip, using a combination of on-chip circuitry and software.

  11. Title of dissertation: SYNCHRONIZATION OF CHAOTIC OPTOELECTRONIC OSCILLATORS

    E-Print Network [OSTI]

    Anlage, Steven

    ABSTRACT Title of dissertation: SYNCHRONIZATION OF CHAOTIC OPTOELECTRONIC OSCILLATORS: ADAPTIVE channels. Here, using a fiber-optic network of chaotic optoelectronic oscillators, we experimentally on synchronization. Through measurements of the convergence rate to synchronization in networks of optoelectronic

  12. Freeway Short-Term Traffic Flow Forecasting by Considering Traffic Volatility Dynamics and Missing Data Situations

    E-Print Network [OSTI]

    Zhang, Yanru

    2012-10-19T23:59:59.000Z

    , assuming constant variance when perform forecasting. This method does not consider the volatility nature of traffic flow data. This paper demonstrated that the variance part of traffic flow data is not constant, and dependency exists. A volatility model...

  13. Bicycle traffic planning and design criteria

    E-Print Network [OSTI]

    Vathana, Jhirasak

    1975-01-01T23:59:59.000Z

    BICYCLE TRAFFIC PLANNING AND DESIGN CRITERIA A Thesis JHIRASAK VATHANA Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE May 1975 Major Subject...: Interdisciplinary Engineering BICYCLE TRAFFIC PLANNING AND DESIGN CRITER1A A Thesis DHIRASAK VATHANA Approved as to style and content by: Chairman of Committee (Head of epartment) j 'j (Memb ) (Member) (Member) May l975 ABSTRACT Bicycle Traffic Planning...

  14. Method and system for controlling a synchronous machine over full operating range

    DOE Patents [OSTI]

    Walters, James E. (Carmel, IN); Gunawan, Fani S. (Westfield, IN); Xue, Yanhong (Westfield, IN)

    2002-01-01T23:59:59.000Z

    System and method for controlling a synchronous machine are provided. The method allows for calculating a stator voltage index. The method further allows for relating the magnitude of the stator voltage index against a threshold voltage value. An offset signal is generated based on the results of the relating step. A respective state of operation of the machine is determined. The offset signal is processed based on the respective state of the machine.

  15. Mobile Traffic Management System Test Deployment

    E-Print Network [OSTI]

    Gerfen, Jeffrey Brian

    2005-01-01T23:59:59.000Z

    BERKELEY Mobile Traf?c Management System Test DeploymentHIGHWAYS MOBILE TRAFFIC MANAGEMENT SYSTEM TEST DEPLOYMENTMobile Transportation Management System (MTMS). This new and

  16. Test instances for the traffic assignment problem

    E-Print Network [OSTI]

    2008-01-08T23:59:59.000Z

    Jan 8, 2008 ... mation on test problems previously used in the literature to facilitate benchmarking. Keywords. Traffic assignment problem, BPR function, ...

  17. New Discoveries of Domination between Traffic Matrices

    E-Print Network [OSTI]

    2014-10-13T23:59:59.000Z

    Oct 13, 2014 ... pointed out that the domains supported by different traffic matrices are iso- morphic on the extended concept of support. Besides, we offer an ...

  18. Biologically inspired mutual synchronization of manufacturing machines

    E-Print Network [OSTI]

    Armbruster, Dieter

    Biologically inspired mutual synchronization of manufacturing machines Erjen Lefeber,a,1 , Herman machine is developed. This control system is based on a synchronization mechanism of enzymes replacing of a single turnover cycle. In manufacturing, batch machines serve several jobs simultaneously, e.g., heat

  19. A Kinematic Wave Traffic Flow Model for Mixed Traffic H. M. Zhang1

    E-Print Network [OSTI]

    Mease, Kenneth D.

    A Kinematic Wave Traffic Flow Model for Mixed Traffic H. M. Zhang1 Department of Civil-mail: wjin@ucdavis.edu ABSTRACT In this paper we extend the Lighthill-Whitham-Richards kinematic wave traffic kinematic wave model developed by Lighthill, Whitham (3) and Richards (4): t+(V())x=0, V( )Q(). (3

  20. Design of coupling for synchronization in time-delayed systems

    E-Print Network [OSTI]

    Dibakar Ghosh; Ioan Grosu; Syamal Kumar Dana

    2012-07-03T23:59:59.000Z

    We report a design of delay coupling for targeting desired synchronization in delay dynamical systems. We target synchronization, antisynchronization, lag-, antilag- synchronization, amplitude death (or oscillation death) and generalized synchronization in mismatched oscillators. A scaling of the size of an attractor is made possible in different synchronization regimes. We realize a type of mixed synchronization where synchronization, antisynchronization coexist in different pairs of state variables of the coupled system. We establish the stability condition of synchronization using the Krasovskii-Lyapunov function theory and the Hurwitz matrix criterion. We present numerical examples using the Mackey-Glass system and a delay R\\"{o}ssler system.

  1. Clustering versus non-clustering phase synchronizations

    SciTech Connect (OSTI)

    Liu, Shuai [Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China) [Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China); University of Chinese Academy of Sciences, Beijing 100049 (China); Zhan, Meng, E-mail: zhanmeng@wipm.ac.cn [Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China)] [Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China)

    2014-03-15T23:59:59.000Z

    Clustering phase synchronization (CPS) is a common scenario to the global phase synchronization of coupled dynamical systems. In this work, a novel scenario, the non-clustering phase synchronization (NPS), is reported. It is found that coupled systems do not transit to the global synchronization until a certain sufficiently large coupling is attained, and there is no clustering prior to the global synchronization. To reveal the relationship between CPS and NPS, we further analyze the noise effect on coupled phase oscillators and find that the coupled oscillator system can change from CPS to NPS with the increase of noise intensity or system disorder. These findings are expected to shed light on the mechanism of various intriguing self-organized behaviors in coupled systems.

  2. Capacity-aware back-pressure traffic signal control

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    load, one must wonder whether the network is used at its maximum capacity. Vehicle automation is expected to enable much more precise and intelligent coordination between vehicles, possibly reducing congestion [1]. However, automated cars are not currently ready for large commercial deployment. Human

  3. An analysis of peak traffic demand at signalized urban intersections

    E-Print Network [OSTI]

    Drew, Donald R

    1961-01-01T23:59:59.000Z

    . Thus, . the ratio of the duration of a given phase to the total cycle length is equal to the demand on the given phase divided by the demand on all phases. This has been referred to as the G/C th d, d pl l 't ppl' t' - d h d th H~ih ~Ct M 1 )3... be rejected or expanded to accommodate the higher rates of flow which exist over shorter intervals within the peak hour. 6600 550 VOLUME ? (3 LANES) Z W c( ) ) 0 LU z 6000 5558 8 5400 0 4800 O 4200 4I 500 0 450 400 TOTAL HOURLY VOLUME ? 5558...

  4. Ohio Town Installing 'Green' Traffic Signals | Department of...

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

    success. | Photo Courtesy of Flickr user mjasonprickett David Crockett, Chattanooga's Green Frontiersman EAA Executive Director Luis Bernal addresses an audience about Puerto...

  5. LIGHT EMITTING DIODE (LED) TRAFFIC SIGNAL SURVEY RESULTS

    E-Print Network [OSTI]

    Bernardino County Roseville Sebastopol West Covina San Diego County Ross Shasta Lake West Hollywood San

  6. Fermilab | Traffic Safety at Fermilab |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsing ZirconiaPolicyFeasibility ofSmall15.000Technology |TheoryTufteTake FiveTraffic

  7. Spiking Optical Patterns and Synchronization

    E-Print Network [OSTI]

    Rosenbluh, Michael; Cohen, Elad; Khaykovich, Lev; Kinzel, Wolfgang; Kopelowitz, Evi; Yoskovits, Pinhas; Kanter, Ido

    2007-01-01T23:59:59.000Z

    We analyze the time resolved spike statistics of a solitary and two mutually interacting chaotic semiconductor lasers whose chaos is characterized by apparently random, short intensity spikes. Repulsion between two successive spikes is observed, resulting in a refractory period which is largest at laser threshold. For time intervals between spikes greater than the refractory period, the distribution of the intervals follows a Poisson distribution. The spiking pattern is highly periodic over time windows corresponding to the optical length of the external cavity, with a slow change of the spiking pattern as time increases. When zero-lag synchronization between the two lasers is established, the statistics of the nearly perfectly matched spikes are not altered. The similarity of these features to those found in complex interacting neural networks, suggests the use of laser systems as simpler physical models for neural networks.

  8. Conservation Law Models for Traffic Flow

    E-Print Network [OSTI]

    Bressan, Alberto

    Conservation Law Models for Traffic Flow Alberto Bressan Mathematics Department, Penn State University http://www.math.psu.edu/bressan/ Alberto Bressan (Penn State) Scalar Conservation Laws 1 / 117 #12;Review of hyperbolic conservation laws Models of traffic flow, on a single road and on a network of roads

  9. Approaching Real-time Network Traffic Classification

    E-Print Network [OSTI]

    Haddadi, Hamed

    and studies. It serves as the input for Intrusion Detection Systems, provides Class-of-Service (CoS) mapping22 Approaching Real-time Network Traffic Classification ISSN 1470-5559 RR-06-12 October 2006-time Network Traffic Classification Wei Li, Kaysar Abdin, Robert Dann and Andrew Moore Department of Computer

  10. BLINC: Multilevel Traffic Classification in the Dark

    E-Print Network [OSTI]

    Rajamani, Sriram K.

    the dark" ­ No port numbers ­ No payload web streaming P2P #12;3 The problem of workload characterizationBLINC: Multilevel Traffic Classification in the Dark Thomas Karagiannis, UC Riverside Konstantina ­ Why in the dark? · Traffic profiling based on TCP/UDP ports ­ Misleading · Payload

  11. Synchronizing compute node time bases in a parallel computer

    DOE Patents [OSTI]

    Chen, Dong; Faraj, Daniel A; Gooding, Thomas M; Heidelberger, Philip

    2014-12-30T23:59:59.000Z

    Synchronizing time bases in a parallel computer that includes compute nodes organized for data communications in a tree network, where one compute node is designated as a root, and, for each compute node: calculating data transmission latency from the root to the compute node; configuring a thread as a pulse waiter; initializing a wakeup unit; and performing a local barrier operation; upon each node completing the local barrier operation, entering, by all compute nodes, a global barrier operation; upon all nodes entering the global barrier operation, sending, to all the compute nodes, a pulse signal; and for each compute node upon receiving the pulse signal: waking, by the wakeup unit, the pulse waiter; setting a time base for the compute node equal to the data transmission latency between the root node and the compute node; and exiting the global barrier operation.

  12. Synchronous Droplet Microfluidics: One "Clock" to rule them all

    E-Print Network [OSTI]

    Katsikis, Georgios

    2013-01-01T23:59:59.000Z

    Controlling fluid droplets efficiently in the microscale is of great interest both from a basic science and a technology perspective. We have designed and developed a general-purpose, highly scalable microfluidic control strategy through a single global clock signal that enables synchronous control of arbitrary number of droplets in a planar geometry. A rotating precessive magnetic field provides a global clock signal, enabling simultaneous control of droplet position, velocity and trajectories. Here, in this fluid dynamics video, we explain the main physics of this new microfluidic concept. Video data from droplets moving in sync in different fluidic circuits are included. The experimental setup is described and video data is analyzed to provide a detailed view of the time-dynamics of propagating droplets. Finally, we explore the operational limits of this concept, scaling and phase diagram with physical regime diagram.

  13. Synchronization of high speed framing camera and intense electron-beam accelerator

    SciTech Connect (OSTI)

    Cheng Xinbing; Liu Jinliang; Hong Zhiqiang; Qian Baoliang [College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan 410073 (China)

    2012-06-15T23:59:59.000Z

    A new trigger program is proposed to realize the synchronization of high speed framing camera (HSFC) and intense electron-beam accelerator (IEBA). The trigger program which include light signal acquisition radiated from main switch of IEBA and signal processing circuit could provide a trigger signal with rise time of 17 ns and amplitude of about 5 V. First, the light signal was collected by an avalanche photodiode (APD) module, and the delay time between the output voltage of APD and load voltage of IEBA was tested, it was about 35 ns. Subsequently, the output voltage of APD was processed further by the signal processing circuit to obtain the trigger signal. At last, by combining the trigger program with an IEBA, the trigger program operated stably, and a delay time of 30 ns between the trigger signal of HSFC and output voltage of IEBA was obtained. Meanwhile, when surface flashover occurred at the high density polyethylene sample, the delay time between the trigger signal of HSFC and flashover current was up to 150 ns, which satisfied the need of synchronization of HSFC and IEBA. So the experiment results proved that the trigger program could compensate the time (called compensated time) of the trigger signal processing time and the inherent delay time of the HSFC.

  14. Quantum Clock Synchronization with a Single Qudit

    E-Print Network [OSTI]

    Armin Tavakoli; Adán Cabello; Marek ?ukowski; Mohamed Bourennane

    2015-01-23T23:59:59.000Z

    Clock synchronization for nonfaulty processes in multiprocess networks is indispensable for a variety of technologies. A reliable system must be able to resynchronize the nonfaulty processes upon some components failing causing the distribution of incorrect or conflicting information in the network. The task of synchronizing such networks is related to detectable Byzantine agreement (DBA), which can classically be solved using recursive algorithms if and only if less than one-third of the processes are faulty. Here we introduce a nonrecursive quantum algorithm that solves the DBA and achieves clock synchronization in the presence of arbitrary many faulty processes by using only a single quantum system.

  15. Harmonic mixing in two coupled qubits: quantum synchronization via ac drives

    E-Print Network [OSTI]

    S. E. Savel'ev; Z. Washington; A. M. Zagoskin; M. J. Everitt

    2012-10-12T23:59:59.000Z

    Simulating a system of two driven coupled qubits, we show that the time-averaged probability to find one driven qubit in its ground or excited state can be controlled by an ac drive in the second qubit. Moreover, off-diagonal elements of the density matrix responsible for quantum coherence can also be controlled via driving the second qubit, i.e., quantum coherence can be enhanced by appropriate choice of the bi-harmonic signal. Such a dynamic synchronization of two differently driven qubits has an analogy with harmonic mixing of Brownian particles forced by two signals through a substrate. Nevertheless, the quantum synchronization in two qubits occurs due to multiplicative coupling of signals in the qubits rather than via a nonlinear harmonic mixing for a classical nano-particle.

  16. Synchronization of coupled large-scale Boolean networks

    SciTech Connect (OSTI)

    Li, Fangfei, E-mail: li-fangfei@163.com [Department of Mathematics, East China University of Science and Technology, No. 130, Meilong Road, Shanghai, Shanghai 200237 (China)] [Department of Mathematics, East China University of Science and Technology, No. 130, Meilong Road, Shanghai, Shanghai 200237 (China)

    2014-03-15T23:59:59.000Z

    This paper investigates the complete synchronization and partial synchronization of two large-scale Boolean networks. First, the aggregation algorithm towards large-scale Boolean network is reviewed. Second, the aggregation algorithm is applied to study the complete synchronization and partial synchronization of large-scale Boolean networks. Finally, an illustrative example is presented to show the efficiency of the proposed results.

  17. Scheduling and synchronization for multicore concurrency platforms

    E-Print Network [OSTI]

    Agrawal, Kunal

    2009-01-01T23:59:59.000Z

    Developing correct and efficient parallel programs is difficult since programmers often have to manage low-level details like scheduling and synchronization explicitly. Recently, however, many hardware vendors have been ...

  18. Commande coopérative des systèmes monoconvertisseurs multimachines synchrones.

    E-Print Network [OSTI]

    Bidart, Damien

    2011-01-01T23:59:59.000Z

    ??Afin de rendre les machines synchrones à aimants permanents plus attractives pour l'aéronautique (actionneurs de commande de vol, systèmes de freinage, train d'atterrissage ...), il… (more)

  19. Autonomous Traffic Control System Using Agent Based Technology

    E-Print Network [OSTI]

    M, Venkatesh; V, Srinivas

    2011-01-01T23:59:59.000Z

    The way of analyzing, designing and building of real-time projects has been changed due to the rapid growth of internet, mobile technologies and intelligent applications. Most of these applications are intelligent, tiny and distributed components called as agent. Agent works like it takes the input from numerous real-time sources and gives back the real-time response. In this paper how these agents can be implemented in vehicle traffic management especially in large cities and identifying various challenges when there is a rapid growth of population and vehicles. In this paper our proposal gives a solution for using autonomous or agent based technology. These autonomous or intelligent agents have the capability to observe, act and learn from their past experience. This system uses the knowledge flow of precedent signal or data to identify the incoming flow of forthcoming signal. Our architecture involves the video analysis and exploration using some Intelligence learning algorithm to estimate and identify the...

  20. A new measure of phase synchronization for a pair of time series and seizure focus localization

    E-Print Network [OSTI]

    Kaushik Majumdar

    2006-12-22T23:59:59.000Z

    Defining and measuring phase synchronization in a pair of nonlinear time series are highly nontrivial. This can be done with the help of Fourier transform, when it exists, for a pair of stored (hence stationary) signals. In a time series instantaneous phase is often defined with the help of Hilbert transform. In this paper phase of a time series has been defined with the help of Fourier transform. This gives rise to a deterministic method to detect phase synchronization in its most general form between a pair of time series. Since this is a stricter method than the statistical methods based on instantaneous phase, this can be used for lateralization and source localization of epileptic seizures with greater accuracy. Based on this method a novel measure of phase synchronization, called syn function, has been defined, which is capable of quantifying neural phase synchronization and asynchronization as important parameters of epileptic seizure dynamics. It has been shown that such a strict measure of phase synchronization has potential application in seizure focus localization from scalp electroencephalogram (EEG) data, without any knowledge of electrical conductivity of the head.

  1. Synchronization of Mechanical Oscillators: An Experimental Study

    E-Print Network [OSTI]

    Daneshvar, Roozbeh

    2011-02-22T23:59:59.000Z

    SYNCHRONIZATION OF MECHANICAL OSCILLATORS: AN EXPERIMENTAL STUDY A Thesis by ROOZBEH DANESHVAR Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of MASTER OF SCIENCE December... 2010 Major Subject: Electrical Engineering SYNCHRONIZATION OF MECHANICAL OSCILLATORS: AN EXPERIMENTAL STUDY A Thesis by ROOZBEH DANESHVAR Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements...

  2. Global Analysis of Synchronization in Coupled Maps

    E-Print Network [OSTI]

    Juergen Jost; Kiran M. Kolwankar

    2005-12-02T23:59:59.000Z

    We introduce a new method for determining the global stability of synchronization in systems of coupled identical maps. The method is based on the study of invariant measures. Besides the simplest non-trivial example, namely two symmetrically coupled tent maps, we also treat the case of two asymmetrically coupled tent maps as well as a globally coupled network. Our main result is the identification of the precise value of the coupling parameter where the synchronizing and desynchronizing transitions take place.

  3. Kinematic Wave Models of Network Vehicular Traffic Wenlong Jin

    E-Print Network [OSTI]

    Mease, Kenneth D.

    Kinematic Wave Models of Network Vehicular Traffic By Wenlong Jin B.S. (University of Science Applied Mathematics Kinematic Wave Models of Network Vehicular Traffic Abstract The kinematic wave theory vehicular traffic. In this dissertation, we study kinematic wave models of network traffic, which

  4. Structure Evolution of Dynamic Bayesian Network for Traffic Accident Detection

    E-Print Network [OSTI]

    Cho, Sung-Bae

    Structure Evolution of Dynamic Bayesian Network for Traffic Accident Detection Ju-Won Hwang, Young and the accuracy in a domain of the traffic accident detection. Keywords-structure of dynamic Bayesian network; Bayesian network, evolution I. INTRODUCTION Every year, traffic congestion and traffic accidents have been

  5. Traffic Safety Culture Center for Transportation Safety

    E-Print Network [OSTI]

    generally opposed to raising the state's gasoline tax to pay for new roads or to make the roads safer. The Texas Traffic Safety Culture Survey was conducted at ten driver license stations operated by the Texas

  6. On traffic analysis attacks and countermeasures

    E-Print Network [OSTI]

    Fu, Xinwen

    2007-04-25T23:59:59.000Z

    . To detect the connectivity of a flow, an adversary may embed a recognizable pattern of marks into traffic flows by interference. We have proposed new countermeasures based on the digital filtering technology. Experimental results have demonstrated...

  7. Partitioning Complexity in Air Traffic Management Task

    E-Print Network [OSTI]

    Cummings, M. L.

    2006-01-01T23:59:59.000Z

    Cognitive complexity is a term that appears frequently in air traffic control (ATC) research literature, yet there is little principled investigation of the potential sources of cognitive complexity. Three distinctly ...

  8. The design of a microprogrammed traffic controller

    E-Print Network [OSTI]

    Tietjen, James Leslie

    1973-01-01T23:59:59.000Z

    Subject: Electrical Fngineering THE DESIGN OF A MICROPROGRAMMED TRAFFIC CONTROLLER A Thesis by JAMES LESLIE TIETJEN Approved as to style and content by: ar a o C rttee ea o epartm nt em er m er Mem er em er Mem er August 1973 ABSTRACT... The Design of a Microprogrammed Traffic Controller. (August 1973) James Leslie Tietjen, B. S, , Texas ABM 11niversity Directed By: Dr, V. Thomas Rhyne The purpose of this thesis is to design, simulate, and evaluate a microprogrammed system...

  9. Fuel consumption analyses for urban traffic management

    SciTech Connect (OSTI)

    Bowyer, D.P.; Akcelik, R.; Biggs, D.C.

    1986-12-01T23:59:59.000Z

    A primary output from the fuel consumption research conducted by the Australian Road Research Board (ARRB) is the ARRB Special Report, Guide to Fuel Consumption Analyses. This article briefly summarizes the background of the guide, describes its major features, and considers its relevance to urban traffic management decision. The guide was a result of a technical audit of studies relating to energy consumption in traffic and transport systems. A brief summary of the audit process and findings is given. The guide is intended primarily as an aid to effective use of fuel consumption models in the design of traffic management schemes. The forms of four interrelated fuel consumption models of the guide are described and their likely transferability to various situations is indicated. Each traffic and fuel consumption model is appropriate to a particular scale of traffic system. This link is shown for several selected traffic models. As an example, a discussion of the importance of accurate fuel consumption estimates for the case of priority control at a particular intersection is given.

  10. Data Capture Technique for High Speed Signaling

    DOE Patents [OSTI]

    Barrett, Wayne Melvin (Rochester, MN); Chen, Dong (Croton On Hudson, NY); Coteus, Paul William (Yorktwon Heights, NY); Gara, Alan Gene (Mount Kisco, NY); Jackson, Rory (Eastchester, NY); Kopcsay, Gerard Vincent (Yorktown Hieghts, NY); Nathanson, Ben Jesse (Teaneck, NY); Vranas, Paylos Michael (Bedford Hills, NY); Takken, Todd E. (Brewster, NY)

    2008-08-26T23:59:59.000Z

    A data capture technique for high speed signaling to allow for optimal sampling of an asynchronous data stream. This technique allows for extremely high data rates and does not require that a clock be sent with the data as is done in source synchronous systems. The present invention also provides a hardware mechanism for automatically adjusting transmission delays for optimal two-bit simultaneous bi-directional (SiBiDi) signaling.

  11. Generalized synchronization of chaos in autonomous systems

    E-Print Network [OSTI]

    O. Alvarez-Llamoza; M. G. Cosenza

    2008-10-13T23:59:59.000Z

    We extend the concept of generalized synchronization of chaos, a phenomenon that occurs in driven dynamical systems, to the context of autonomous spatiotemporal systems. It means a situation where the chaotic state variables in an autonomous system can be synchronized to each other but not to a coupling function defined from them. The form of the coupling function is not crucial; it may not depend on all the state variables nor it needs to be active for all times for achieving generalized synchronization. The procedure is based on the analogy between a response map subject to an external drive acting with a probability p and an autonomous system of coupled maps where a global interaction between the maps takes place with this same probability. It is shown that, under some circumstances, the conditions for stability of generalized synchronized states are equivalent in both types of systems. Our results reveal the existence of similar minimal conditions for the emergence of generalized synchronization of chaos in driven and in autonomous spatiotemporal systems.

  12. Robust Timing Synchronization for AC-OFDM Based Optical Wireless Communications

    E-Print Network [OSTI]

    Ranjha, Bilal A; Kavehrad, Mohsen; Deng, Peng

    2015-01-01T23:59:59.000Z

    Visible light communications (VLC) have recently attracted a growing interest and can be a potential solution to realize indoor wireless communication with high bandwidth capacity for RF-restricted environments such as airplanes and hospitals. Optical based orthogonal frequency division multiplexing (OFDM) systems have been proposed in the literature to combat multipath distortion and intersymbol interference (ISI) caused by multipath signal propagation. In this paper, we present a robust timing synchronization scheme suitable for asymmetrically clipped (AC) OFDM based optical intensity modulated direct detection (IM/DD) wireless systems. Our proposed method works perfectly for ACO-OFDM, Pulse amplitude modulated discrete multitone (PAM-DMT) and discrete Hartley transform (DHT) based optical OFDM systems. In contrast to existing OFDM timing synchronization methods which are either not suitable for AC OFDM techniques due to unipolar nature of output signal or perform poorly, our proposed method is suitable for...

  13. Time delayed laser networks: phase versus chaos synchronization

    E-Print Network [OSTI]

    Reidler, I; Aviad, Y; Guberman, S; Friesem, A A; Rosenbluh, M; Davidson, N; Kanter, I

    2013-01-01T23:59:59.000Z

    The synchronization of chaotic lasers and the optical phase synchronization of light originating in multiple coupled lasers have both been extensively studied, however, the interplay between these two phenomena, especially at the network level is unexplored. Here we experimentally compare chaos synchronization of laser networks with heterogeneous coupling delay times to phase synchronization of similar networks. While chaotic lasers exhibit deterioration in synchronization as the network time delay heterogeneity increases, phase synchronization is found to be independent of heterogeneity. The experimental results are found to be in agreement with numerical simulations for semiconductor lasers.

  14. Time delayed laser networks: phase versus chaos synchronization

    E-Print Network [OSTI]

    I. Reidler; M. Nixon; Y. Aviad; S. Guberman; A. A. Friesem; M. Rosenbluh; N. Davidson; I. Kanter

    2013-04-03T23:59:59.000Z

    The synchronization of chaotic lasers and the optical phase synchronization of light originating in multiple coupled lasers have both been extensively studied, however, the interplay between these two phenomena, especially at the network level is unexplored. Here we experimentally compare chaos synchronization of laser networks with heterogeneous coupling delay times to phase synchronization of similar networks. While chaotic lasers exhibit deterioration in synchronization as the network time delay heterogeneity increases, phase synchronization is found to be independent of heterogeneity. The experimental results are found to be in agreement with numerical simulations for semiconductor lasers.

  15. http://tti.tamu.edu > Variable message signs > Traffic actuated controllers > Traffic signals > Flashing traffic signals > Lane use control signals > Road markings > Rumble strips > Warrants (Traffic control devices) > Gro

    E-Print Network [OSTI]

    agencies and private- sector companies on the design, construction, testing and evaluation of highway railings > Transportation corridors > Streambeds > Pipelin Street lighting > Freeways > Highways > Arterial > Light emitting diodes > Portable equipment > Construction equipment > Roadbuilding machinery

  16. Detecting Generalized Synchronization of Chaotic Dynamical Systems: A Kernel-based Method and Choice of Its Parameter

    E-Print Network [OSTI]

    Hiromichi Suetani; Yukito Iba; Kazuyuki Aihara

    2005-07-21T23:59:59.000Z

    An approach based on the kernel methods for capturing the nonlinear interdependence between two signals is introduced. It is demonstrated that the proposed approach is useful for characterizing generalized synchronization with a successful simple example. An attempt to choose an optimal kernel parameter based on cross validation is also discussed.

  17. Driven synchronization in random networks of oscillators

    E-Print Network [OSTI]

    Hindes, Jason

    2015-01-01T23:59:59.000Z

    Synchronization is a universal phenomenon found in many non-equilibrium systems. Much recent interest in this area has overlapped with the study of complex networks, where a major focus is determining how a system's connectivity patterns affect the types of behavior that it can produce. Thus far, modeling efforts have focused on the tendency of networks of oscillators to mutually synchronize themselves, with less emphasis on the effects of external driving. In this work we discuss the interplay between mutual and driven synchronization in networks of phase oscillators of the Kuramoto type, and resolve how the structure and emergence of such states depends on the underlying network topology for simple random networks with a given degree distribution. We provide a partial bifurcation analysis, centering on the appearance of a Takens-Bogdanov-Cusp singularity, which broadly separates homogeneous and heterogeneous network behavior in a weak coupling limit, and from which the number, stability and appearance of dr...

  18. Behavioral/Systems/Cognitive Synchronous, Focally Modulated -Band Oscillations

    E-Print Network [OSTI]

    Graybiel, Ann M.

    , primarily synchronous -band voltage oscillations occur in the sensorimotor and frontal cortex of humansBehavioral/Systems/Cognitive Synchronous, Focally Modulated -Band Oscillations Characterize Local oscillations in the -frequency band ( 15­30Hz

  19. New approach to the fault location problem using synchronized sampling

    E-Print Network [OSTI]

    Mrkic, Jasna

    2012-06-07T23:59:59.000Z

    This thesis presents a new approach to solving the problem of fault location on a transmission line using synchronized data from both ends of the line. The synchronized phase voltage and current samples taken during the fault transient are used...

  20. Blind Block Synchronization Algorithms in Cyclic Prefix Systems

    E-Print Network [OSTI]

    Vaidyanathan, P. P.

    Blind Block Synchronization Algorithms in Cyclic Prefix Systems Borching Su Department to solving the problem blindly, that is, where training symbols are not available. Blind symbol synchronization problem is especially important in many blind channel estimation algorithms in the literature

  1. Development and analysis of a flexible signal phasing strategy for diamond interchange control

    E-Print Network [OSTI]

    Krueger, Gregory David

    1995-01-01T23:59:59.000Z

    There are many signal timing strategies for diamond interchanges. Due to the different geometric and traffic conditions, however, none of the available strategies is always optimal. The two most widely used strategies, three-phase, and four...

  2. The Simulation of Synchronous Reactive Systems In Ptolemy II

    E-Print Network [OSTI]

    The Simulation of Synchronous Reactive Systems In Ptolemy II by Paul Whitaker Submitted to the Department of Electrical Engineering and Computer Sciences, University of California at Berkeley, in partial;_____________________________________________________________________ Simulation of Synchronous Reactive Systems in Ptolemy II ii Abstract The Synchronous Reactive (SR) domain

  3. Scheduling Techniques for Synchronous and Multidimensional Synchro nous Dataflow

    E-Print Network [OSTI]

    techniques for programs expressed as Synchronous Dataflow (SDF) and Multidimensional Synchronous dataflow­time constraints. Multidimensional Synchronous Dataflow (MDSDF) is an extension of SDF to multiple dimensions spaces, are more naturally modeled and specified than in SDF. The amount of on­chip memory available

  4. Excitation system for rotating synchronous machines

    DOE Patents [OSTI]

    Umans, Stephen D. (Belmont, MA); Driscoll, David J. (South Euclid, OH)

    2002-01-01T23:59:59.000Z

    A system for providing DC current to a rotating superconducting winding is provided. The system receives current feedback from the superconducting winding and determines an error signal based on the current feedback and a reference signal. The system determines a control signal corresponding to the error signal and provides a positive and negative superconducting winding excitation voltage based on the control signal.

  5. Simulation of Synchronous Machines This chapter covers

    E-Print Network [OSTI]

    McCalley, James D.

    by the following. · We are about to perform a time domain simulation of a multi machine system where each machine1 Simulation of Synchronous Machines This chapter covers: (A) Sections 5.25.7: Determination of initial conditions (B) Section 5.8: Determination of machine parameters from manufacturers' data

  6. Clock synchronization for mobile ad hoc networks

    E-Print Network [OSTI]

    Chandra, Rajan

    2013-02-22T23:59:59.000Z

    Time Protocol) used in wired networks (e.g. Internet) to Mobile Ad Hoc Networks (MANets). It may also be achieved by developing other algorithms that achieve clock synchronization and may be suitable for MANets. Using the Network Time Protocol (NTP...

  7. Driven synchronization in random networks of oscillators

    E-Print Network [OSTI]

    Jason Hindes; Christopher R. Myers

    2015-02-28T23:59:59.000Z

    Synchronization is a universal phenomenon found in many non-equilibrium systems. Much recent interest in this area has overlapped with the study of complex networks, where a major focus is determining how a system's connectivity patterns affect the types of behavior that it can produce. Thus far, modeling efforts have focused on the tendency of networks of oscillators to mutually synchronize themselves, with less emphasis on the effects of external driving. In this work we discuss the interplay between mutual and driven synchronization in networks of phase oscillators of the Kuramoto type, and resolve how the structure and emergence of such states depends on the underlying network topology for simple random networks with a given degree distribution. We provide a partial bifurcation analysis, centering on the appearance of a Takens-Bogdanov-Cusp singularity, which broadly separates homogeneous and heterogeneous network behavior in a weak coupling limit, and from which the number, stability and appearance of driven and mutually synchronized states can be determined, as a function of a few parameters. We find transitions such as Saddle-Node-Infinite-Periods, Limit-Point-of-Cycles, and Hopf bifurcations (both branches), as well as multiple bistability regions and dynamics that differ for the network types. This description is connected to the underlying dynamics of oscillator clusters for important states and transitions. Our results can provide a basis for studying the problem of frequency controlling disordered oscillator networks.

  8. Synchronized phasor measurements and the ``SYNCHROPHASOR`` standard

    SciTech Connect (OSTI)

    Phadke, A.G. [Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)

    1996-10-01T23:59:59.000Z

    Synchronized phasor measurements have become a practical proposition only during the last few years. As such, their potential for use in power system applications has not yet been fully realized. Anticipating that this technology is about to take off, the Power System Relaying Committee of the IEEE has developed a standard which defines the interface between the Global Positioning System (GPS) and the Phasor Measuring Unit (PMU), and for the communication link between the PMUs and a remote site. The standard (SYNCHROPHASOR) will be published during 1996, and should facilitate the widespread application of this emerging technology. The standard defines the following features of the PMU: format of the message which contains the phasor data, time-tag specification, data frame composition, and a check sum. The standard also includes a specification for the synchronizing pulses which may be produced by a GPS receiver, or by some other synchronizing source. Synchronized phasor measurement units may well be the universal power system transducer of the future. It will serve the needs of all monitoring and control functions in power system control centers, and in many of the back-up relaying functions.

  9. Networks, smart grids: new model for synchronization

    E-Print Network [OSTI]

    - 1 - Networks, smart grids: new model for synchronization May 21, 2013 Networks of individual scenarios and in smart grid applications. "Smart grid" refers to technology to modernize utility electricity in a volatile smart grid scenario that included fluctuating loads with random power demand, renewable energy

  10. Generation and Synchronous TreeAdjoining Grammars

    E-Print Network [OSTI]

    Shieber, Stuart

    Generation and Synchronous Tree­Adjoining Grammars Stuart M. Shieber Yves Schabes Aiken Computation) have been proposed as a formal­ ism for generation based on the intuition that the extended domain serving as an aid to generation from semantic representations. We demonstrate that this intuition can

  11. Explicit Communication and Synchronization in SARC

    E-Print Network [OSTI]

    Katevenis, Manolis G.H.

    · Communication using a 64bit, 5port bufferless crossbar switch · Three Diverse applications Jacobi, Bitonic cores · 2x4x reduced network traffic · 35%70% Energy reduction · 50%90% Energy Delay Product (EDP) gy y ( ) reduction · 15%30% Power consumption reduction Computer Architecture and VLSI Systems Laboratory (CARV

  12. A study of freeway traffic volume control

    E-Print Network [OSTI]

    Smith, Edwin McMurray

    1958-01-01T23:59:59.000Z

    LI8 RARY i & m ceLLCSE el' lEXAe A STUDY GP FRE8NAY TRAFFIC VOLUME CONTROL Mwin McMurray Smith A Thesis Submitteh to the GracLuate School of the Agricultural ant Mechanical College of Texas in partial fulfillment of the requirements...; to Mr. W. H. Carsten, Director, Department of Traffic Control, City of Dallas; to Mr. W. E. Carmichael, District Engineer, Texas Highway Department; and to the Texas Transportation Institute for furnishing the data which were analyzed for this thesis...

  13. Hanford Traffic Safety FAQs - Hanford Site

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation ProposedUsingFun with Bigfront.jpgcommunity200cell 9 Hanford Traffic Safety144 DecemberTraffic

  14. automated control traffic: Topics by E-print Network

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

    technology, are to increase the safety and through-put of the existing highway by traffic automation. Advanced Vehicle Control... Huandra, Rusli 1998-01-01 14 Traffic Control on...

  15. Laboratory to change vehicle traffic-screening regimen at vehicle...

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

    Changes to vehicle traffic-screening Laboratory to change vehicle traffic-screening regimen at vehicle inspection station Lanes two through five will be open 24 hours a day and...

  16. Modeling and estimation techniques for understanding heterogeneous traffic behavior

    E-Print Network [OSTI]

    Zhao, Zhili

    2004-09-30T23:59:59.000Z

    The majority of current internet traffic is based on TCP. With the emergence of new applications, especially new multimedia applications, however, UDP-based traffic is expected to increase. Furthermore, multimedia applications have sparkled...

  17. Making the Traffic Operations Case for Congestion Pricing: Operational Impacts of Congestion Pricing

    SciTech Connect (OSTI)

    Chin, Shih-Miao [ORNL; Hu, Patricia S [ORNL; Davidson, Diane [ORNL

    2011-02-01T23:59:59.000Z

    Congestion begins when an excess of vehicles on a segment of roadway at a given time, resulting in speeds that are significantly slower than normal or 'free flow' speeds. Congestion often means stop-and-go traffic. The transition occurs when vehicle density (the number of vehicles per mile in a lane) exceeds a critical level. Once traffic enters a state of congestion, recovery or time to return to a free-flow state is lengthy; and during the recovery process, delay continues to accumulate. The breakdown in speed and flow greatly impedes the efficient operation of the freeway system, resulting in economic, mobility, environmental and safety problems. Freeways are designed to function as access-controlled highways characterized by uninterrupted traffic flow so references to freeway performance relate primarily to the quality of traffic flow or traffic conditions as experienced by users of the freeway. The maximum flow or capacity of a freeway segment is reached while traffic is moving freely. As a result, freeways are most productive when they carry capacity flows at 60 mph, whereas lower speeds impose freeway delay, resulting in bottlenecks. Bottlenecks may be caused by physical disruptions, such as a reduced number of lanes, a change in grade, or an on-ramp with a short merge lane. This type of bottleneck occurs on a predictable or 'recurrent' basis at the same time of day and same day of week. Recurrent congestion totals 45% of congestion and is primarily from bottlenecks (40%) as well as inadequate signal timing (5%). Nonrecurring bottlenecks result from crashes, work zone disruptions, adverse weather conditions, and special events that create surges in demand and that account for over 55% of experienced congestion. Figure 1.1 shows that nonrecurring congestion is composed of traffic incidents (25%), severe weather (15%), work zones, (10%), and special events (5%). Between 1995 and 2005, the average percentage change in increased peak traveler delay, based on hours spent in traffic in a year, grew by 22% as the national average of hours spent in delay grew from 36 hours to 44 hours. Peak delay per traveler grew one-third in medium-size urban areas over the 10 year period. The traffic engineering community has developed an arsenal of integrated tools to mitigate the impacts of congestion on freeway throughput and performance, including pricing of capacity to manage demand for travel. Congestion pricing is a strategy which dynamically matches demand with available capacity. A congestion price is a user fee equal to the added cost imposed on other travelers as a result of the last traveler's entry into the highway network. The concept is based on the idea that motorists should pay for the additional congestion they create when entering a congested road. The concept calls for fees to vary according to the level of congestion with the price mechanism applied to make travelers more fully aware of the congestion externality they impose on other travelers and the system itself. The operational rationales for the institution of pricing strategies are to improve the efficiency of operations in a corridor and/or to better manage congestion. To this end, the objectives of this project were to: (1) Better understand and quantify the impacts of congestion pricing strategies on traffic operations through the study of actual projects, and (2) Better understand and quantify the impacts of congestion pricing strategies on traffic operations through the use of modeling and other analytical methods. Specifically, the project was to identify credible analytical procedures that FHWA can use to quantify the impacts of various congestion pricing strategies on traffic flow (throughput) and congestion.

  18. Air Traffic Control Using Virtual Stationary Automata Matthew D. Brown

    E-Print Network [OSTI]

    Lynch, Nancy

    Air Traffic Control Using Virtual Stationary Automata by Matthew D. Brown B.S., Massachusetts by . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Arthur C. Smith Chairman, Department Committee on Graduate Students #12;Air Traffic Control Using Virtual of Engineering Abstract As air travel has become an essential part of modern life, the air traffic control system

  19. Supporting Air Traffic Flow Management with Agents Shawn R. Wolfe

    E-Print Network [OSTI]

    Yorke-Smith, Neil

    Supporting Air Traffic Flow Management with Agents Shawn R. Wolfe Intelligent Systems Division NASA Ames Research Center Moffett Field, CA 94035-1000 Shawn.R.Wolfe@nasa.gov Abstract Air traffic flow an agent-based system to facilitate mutually beneficial air traffic management decisions, and identify

  20. Identify and Visualize Differences in Traffic Data Zhonghua Xi*

    E-Print Network [OSTI]

    Lien, Jyh-Ming

    Identify and Visualize Differences in Traffic Data Zhonghua Xi* , Jyh-Ming Lien* , Yi-Chang Chiu visualization is developed to automatically search for events of interest using quantitative metrics, while also relies on traffic analysis. Traffic analysis can be approached as a problem of searching for trends

  1. Randomization in Traffic Information Sharing Systems Masaaki Tanizaki

    E-Print Network [OSTI]

    Wolfson, Ouri E.

    , we consider a traffic information sharing system based on Floating Car Data (FCD). FCD is oneRandomization in Traffic Information Sharing Systems Masaaki Tanizaki Intelligent Media Systems to the server. The traffic information sharing system broadcasts speed information updated by such transmission

  2. Author's personal copy Gasoline prices and traffic safety in Mississippi

    E-Print Network [OSTI]

    Levinson, David M.

    Author's personal copy Gasoline prices and traffic safety in Mississippi Guangqing Chi a, , Arthur November 2010 Keywords: Gasoline prices Traffic crashes Traffic safety Age Gender Race Problem: Limited literature suggests that gasoline prices have substantial effects on reducing fatal crashes. However

  3. Bicycle and pedestrian counting initiative monitors nonmotorized traffic in Minnesota

    E-Print Network [OSTI]

    Minnesota, University of

    Bicycle and pedestrian counting initiative monitors nonmotorized traffic in Minnesota transitways of Transportation (MnDOT) to develop guidelines and analyze information collected in bicycle and pedestrian traffic methods for monitoring and assessing bicycle and pedestrian traffic that can be used in both permanent

  4. DEMAND SIMULATION FOR DYNAMIC TRAFFIC ASSIGNMENT

    E-Print Network [OSTI]

    Bierlaire, Michel

    of the response of travelers to real-time pre- trip information. The demand simulator is an extension of dynamicDEMAND SIMULATION FOR DYNAMIC TRAFFIC ASSIGNMENT Constantinos Antoniou, Moshe Ben-Akiva, Michel Bierlaire, and Rabi Mishalani Massachusetts Institute of Technology, Cambridge, MA 02139 Abstract

  5. Tuning RED for Web Traffic* Mikkel Christiansen,**

    E-Print Network [OSTI]

    Jeffay, Kevin

    139 Tuning RED for Web Traffic* Mikkel Christiansen,** Kevin Jeffay, David Ott, F. Donelson Smith http://www.cs.unc.edu/Research/dirt Abstract We study the effects of RED on the performance of Web -- response time for HTTP request-response pairs. We empirically evaluate RED across a range of parameter

  6. Does Daylight Savings Time Affect Traffic Accidents?

    E-Print Network [OSTI]

    Deen, Sophia 1988-

    2012-04-20T23:59:59.000Z

    This paper studies the effect of changes in accident pattern due to Daylight Savings Time (DST). The extension of the DST in 2007 provides a natural experiment to determine whether the number of traffic accidents is affected by shifts in hours...

  7. TRAFFIC CONGESTION PRICING METHODS AND TECHNOLOGIES

    E-Print Network [OSTI]

    Boyer, Edmond

    be differentiated by time of day, road type and vehicle characteristics, and even set in real time according for passenger and freight transportation. The European UNITE project estimated the costs of traffic congestion in the UK to be 15 billion/yr. or 1.5% of GDP (Nash et al., 2003). For France and Germany the estimates were

  8. Smart-card traffic system keeps Singapore

    E-Print Network [OSTI]

    Hunt, Julian

    Smart-card traffic system keeps Singapore in the fast lane Sir -- Recognizing the high economic tariffs from a smart card installed in a slot near the vehicle's windscreen. Infringement is registered. For expressways and approach routes leading to the city, a tiered pricing scheme operates during the peak period

  9. Variability in continuous traffic monitoring data

    SciTech Connect (OSTI)

    Wright, T.; Hu, P.S. [Oak Ridge National Lab., TN (United States); Young, J. [Tennessee Univ., Knoxville, TN (United States)

    1996-07-01T23:59:59.000Z

    Each state in the United States can be viewed as a universe of road segments. For each road segment in each state, it is desired to know various traffic characteristics based on count data, classification count data, and weigh-in-motion data. These data are absolutely essential for highway design, maintenance, safety, and planning. Given no cost constraints, each road segment would be continuously monitored every day of the year. However, in practice, a few road segments are monitored continuously every day of the year to produce annual characteristics of traffic flow. The remaining road segments are monitored for one or two days each year, and this resulting data are `adjusted` (using factors based on data collected from the continuously monitored road segments) to produce estimates of annual characteristics. With this general approach, each state strives to provide estimates of annual characteristics for each road segment within its jurisdiction. In 1985, the Federal Highway Administration (FHWA) published the Traffic Monitoring Guide to assist states in achieving this end. As with almost any data collection effort, the monitoring data suffers from errors from many sources. In this paper, we report some empirical findings in a research project sponsored by the FHWA. This research project studied the variability in the traffic data from the continuously monitored road segments from state(s) and, the extent to which this variability is transferred to and affects the precision of the data produced from the road segments which are monitored only one or two days each year. The ultimate hope is that states will eventually be able to not only publish an estimate of a characteristic such as Average Annual Daily Traffic (AADT) for each road segment, but also that each estimate will be accompanied by a statement expressing how good the estimate is in terms of its estimated variability or precision, which will likely be expressed as a coefficient of variation.

  10. Synchronous and Cogged Fan Belt Performance Assessment

    SciTech Connect (OSTI)

    Cutler, D.; Dean, J.; Acosta, J.

    2014-02-01T23:59:59.000Z

    The GSA Regional GPG Team commissioned the National Renewable Energy Laboratory (NREL) to perform monitoring of cogged V-belts and synchronous belts on both a constant volume and a variable air volume fan at the Byron G. Rodgers Federal Building and U.S. Courthouse in Denver, Colorado. These motor/fan combinations were tested with their original, standard V-belts (appropriately tensioned by an operation and maintenance professional) to obtain a baseline for standard operation. They were then switched to the cogged V-belts, and finally to synchronous belts. The power consumption by the motor was normalized for both fan speed and air density changes. This was necessary to ensure that the power readings were not influenced by a change in rotational fan speed or by the power required to push denser air. Finally, energy savings and operation and maintenance savings were compiled into an economic life-cycle cost analysis of the different belt options.

  11. Portable Microwave Frequency Dissemination in Free Space and Implications on Ground-Satellite Synchronization

    E-Print Network [OSTI]

    Wang, Bo; Bai, Yu; Yuan, Yibo; Gao, Chao; Wang, Lijun

    2015-01-01T23:59:59.000Z

    Frequency dissemination and synchronization in free space plays an important role in global navigation satellite system (GNSS), radio astronomy and synthetic aperture radar (SAR). In this paper, we demonstrate a portable radio frequency (RF) dissemination scheme via free space using microwave antennas. The setup has a good environment adaptability and high dissemination stability. The frequency signal is disseminated at different distances ranging from 10 to 640 m with a fixed 10 Hz locking bandwidth, and the scaling law of dissemination stability on distance and averaging time is discussed. The preliminary extrapolation shows that the dissemination stability may reach $1\\times10^{-12}/s$ in ground-to-satellite synchronization, which far exceeds all present methods, and is worthy for further study.

  12. FPGA Based Real-time Network Traffic Analysis using Traffic Dispersion Patterns

    SciTech Connect (OSTI)

    Khan, F; Gokhale, M; Chuah, C N

    2010-03-26T23:59:59.000Z

    The problem of Network Traffic Classification (NTC) has attracted significant amount of interest in the research community, offering a wide range of solutions at various levels. The core challenge is in addressing high amounts of traffic diversity found in today's networks. The problem becomes more challenging if a quick detection is required as in the case of identifying malicious network behavior or new applications like peer-to-peer traffic that have potential to quickly throttle the network bandwidth or cause significant damage. Recently, Traffic Dispersion Graphs (TDGs) have been introduced as a viable candidate for NTC. The TDGs work by forming a network wide communication graphs that embed characteristic patterns of underlying network applications. However, these patterns need to be quickly evaluated for mounting real-time response against them. This paper addresses these concerns and presents a novel solution for real-time analysis of Traffic Dispersion Metrics (TDMs) in the TDGs. We evaluate the dispersion metrics of interest and present a dedicated solution on an FPGA for their analysis. We also present analytical measures and empirically evaluate operating effectiveness of our design. The mapped design on Virtex-5 device can process 7.4 million packets/second for a TDG comprising of 10k flows at very high accuracies of over 96%.

  13. Traffic flow wide-area surveillance system definition

    SciTech Connect (OSTI)

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

    1994-11-01T23:59:59.000Z

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

  14. Spatial synchronization and extinction of species under external forcing

    E-Print Network [OSTI]

    R. E. Amritkar; Govindan Rangarajan

    2006-02-20T23:59:59.000Z

    We study the interplay between synchronization and extinction of a species. Using a general model we show that under a common external forcing, the species with a quadratic saturation term in the population dynamics first undergoes spatial synchronization and then extinction, thereby avoiding the rescue effect. This is because the saturation term reduces the synchronization time scale but not the extinction time scale. The effect can be observed even when the external forcing acts only on some locations provided there is a synchronizing term in the dynamics. Absence of the quadratic saturation term can help the species to avoid extinction.

  15. Hybrid function projective synchronization in complex dynamical networks

    SciTech Connect (OSTI)

    Wei, Qiang; Wang, Xing-yuan, E-mail: wangxy@dlut.edu.cn; Hu, Xiao-peng [Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian, 116024 (China)] [Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian, 116024 (China)

    2014-02-15T23:59:59.000Z

    This paper investigates hybrid function projective synchronization in complex dynamical networks. When the complex dynamical networks could be synchronized up to an equilibrium or periodic orbit, a hybrid feedback controller is designed to realize the different component of vector of node could be synchronized up to different desired scaling function in complex dynamical networks with time delay. Hybrid function projective synchronization (HFPS) in complex dynamical networks with constant delay and HFPS in complex dynamical networks with time-varying coupling delay are researched, respectively. Finally, the numerical simulations show the effectiveness of theoretical analysis.

  16. Synchronous digitization for high dynamic range lock-in amplification in beam-scanning microscopy

    SciTech Connect (OSTI)

    Muir, Ryan D.; Sullivan, Shane Z.; Oglesbee, Robert A.; Simpson, Garth J., E-mail: gsimpson@purdue.edu [Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907 (United States)

    2014-03-15T23:59:59.000Z

    Digital lock-in amplification (LIA) with synchronous digitization (SD) is shown to provide significant signal to noise (S/N) and linear dynamic range advantages in beam-scanning microscopy measurements using pulsed laser sources. Direct comparisons between SD-LIA and conventional LIA in homodyne second harmonic generation measurements resulted in S/N enhancements consistent with theoretical models. SD-LIA provided notably larger S/N enhancements in the limit of low light intensities, through the smooth transition between photon counting and signal averaging developed in previous work. Rapid beam scanning instrumentation with up to video rate acquisition speeds minimized photo-induced sample damage. The corresponding increased allowance for higher laser power without sample damage is advantageous for increasing the observed signal content.

  17. Effective synchronization of MRP to production during a lean transformation

    E-Print Network [OSTI]

    Richards, Philip L. (Philip Lloyd)

    2007-01-01T23:59:59.000Z

    Raytheon - Network Centric Systems (NCS) division develops and produces mission solutions for networking, command and control, battlespace awareness, and air traffic management. The facility in Largo, Florida, produces ...

  18. Synchronization of hypernetworks of coupled dynamical systems

    E-Print Network [OSTI]

    Francesco Sorrentino

    2012-03-14T23:59:59.000Z

    We consider synchronization of coupled dynamical systems when different types of interactions are simultaneously present. We assume that a set of dynamical systems are coupled through the connections of two or more distinct networks (each of which corresponds to a distinct type of interaction), and we refer to such a system as a hypernetwork. Applications include neural networks formed of both electrical gap junctions and chemical synapses, the coordinated motion of shoals of fishes communicating through both vision and flow sensing, and hypernetworks of coupled chaotic oscillators. We first analyze the case of a hypernetwork formed of $m=2$ networks. We look for necessary and sufficient conditions for synchronization. We attempt at reducing the linear stability problem in a master stability function form, i.e., at decoupling the effects of the coupling functions from the structure of the networks. Unfortunately, we are unable to obtain a reduction in a master stability function form for the general case. However, we show that such a reduction is possible in three cases of interest: (i) the Laplacian matrices associated with the two networks commute; (ii) one of the two networks is unweighted and fully connected; (iii) one of the two networks is such that the coupling strength from node $i$ to node $j$ is a function of $j$ but not of $i$. Furthermore, we define a class of networks such that if either one of the two coupling networks belongs to this class, the reduction can be obtained independently of the other network. As an example of interest, we study synchronization of a neural hypernetwork for which the connections can be either chemical synapses or electrical gap junctions. We propose a generalization of our stability results to the case of hypernetworks formed of $m\\geq 2$ networks.

  19. Current Reversals and Synchronization in Coupled Ratchets

    E-Print Network [OSTI]

    U. E. Vincent; A. Kenfack; D. V. Senthilkumar; D. Mayer; J. Kürths

    2010-09-26T23:59:59.000Z

    Current reversal is an intriguing phenomenon that has been central to recent experimental and theoretical investigations of transport based on ratchet mechanism. By considering a system of two interacting ratchets, we demonstrate how the coupling can be used to control the reversals. In particular, we find that current reversal that exists in a single driven ratchet system can ultimately be eliminated with the presence of a second ratchet. For specific coupling strengths a current-reversal free regime has been detected. Furthermore, in the fully synchronized state characterized by the coupling threshold $k_{th}$, a specific driving amplitude $a_{opt}$ is found for which the transport is optimum.

  20. Synchronous operation of the BLDC motor

    E-Print Network [OSTI]

    Guzelgunler, Yilcan

    1998-01-01T23:59:59.000Z

    Back EMF 19 22 B. 3. Freewheeling Diode Conduction. . B. 4. Back EMF Integration. 27 30 C. Flux Linkage Based Method. . 33 CHAPTER Page III SENSORLESS START-UP METHODS. . 39 A. Synchronous Start-up. B. Eddy Current. . C. Diagnostic Current... Demagnetization characteristic of a magnet. 7 Flux linkage and induced voltage of phase a, 14 8 Converter configuration of BLDC motor. 19 9 Terminal voltage of phase a. . . . 19 10 Low pass filters and comparator circuit. 11 Wave forms showing how switching...

  1. Optimization of synchronization in gradient clustered networks

    E-Print Network [OSTI]

    Xingang Wang; Liang Huang; Ying-Cheng Lai; Choy Heng Lai

    2007-11-23T23:59:59.000Z

    We consider complex clustered networks with a gradient structure, where sizes of the clusters are distributed unevenly. Such networks describe more closely actual networks in biophysical systems and in technological applications than previous models. Theoretical analysis predicts that the network synchronizability can be optimized by the strength of the gradient field but only when the gradient field points from large to small clusters. A remarkable finding is that, if the gradient field is sufficiently strong, synchronizability of the network is mainly determined by the properties of the subnetworks in the two largest clusters. These results are verified by numerical eigenvalue analysis and by direct simulation of synchronization dynamics on coupled-oscillator networks.

  2. A deterministic, gigabit serial timing, synchronization and data link for the RHIC LLRF

    SciTech Connect (OSTI)

    Hayes, T.; Smith, K.S.; Severino, F.

    2011-03-28T23:59:59.000Z

    A critical capability of the new RHIC low level rf (LLRF) system is the ability to synchronize signals across multiple locations. The 'Update Link' provides this functionality. The 'Update Link' is a deterministic serial data link based on the Xilinx RocketIO protocol that is broadcast over fiber optic cable at 1 gigabit per second (Gbps). The link provides timing events and data packets as well as time stamp information for synchronizing diagnostic data from multiple sources. The new RHIC LLRF was designed to be a flexible, modular system. The system is constructed of numerous independent RF Controller chassis. To provide synchronization among all of these chassis, the Update Link system was designed. The Update Link system provides a low latency, deterministic data path to broadcast information to all receivers in the system. The Update Link system is based on a central hub, the Update Link Master (ULM), which generates the data stream that is distributed via fiber optic links. Downstream chassis have non-deterministic connections back to the ULM that allow any chassis to provide data that is broadcast globally.

  3. Streamlining Transportation Corridor Planning Processess: Freight and Traffic Information

    SciTech Connect (OSTI)

    Franzese, Oscar [ORNL

    2010-08-01T23:59:59.000Z

    The traffic investigation is one of the most important parts of an Environmental Impact Statement of projects involving the construction of new roadway facilities and/or the improvement of existing ones. The focus of the traffic analysis is on the determination of anticipated traffic flow characteristics of the proposed project, by the application of analytical methods that can be grouped under the umbrella of capacity analysis methodologies. In general, the main traffic parameter used in EISs to describe the quality of traffic flow is the Level of Service (LOS). The current state of the practice in terms of the traffic investigations for EISs has two main shortcomings. The first one is related to the information that is necessary to conduct the traffic analysis, and specifically to the lack of integration among the different transportation models and the sources of information that, in general, reside in GIS databases. A discussion of the benefits of integrating CRS&SI technologies and the transportation models used in the EIS traffic investigation is included. The second shortcoming is in the presentation of the results, both in terms of the appearance and formatting, as well as content. The presentation of traffic results (current and proposed) is discussed. This chapter also addresses the need of additional data, in terms of content and coverage. Regarding the former, other traffic parameters (e.g., delays) that are more meaningful to non-transportation experts than LOS, as well as additional information (e.g., freight flows) that can impact traffic conditions and safety are discussed. Spatial information technologies can decrease the negative effects of, and even eliminate, these shortcomings by making the relevant information that is input to the models more complete and readily available, and by providing the means to communicate the results in a more clear and efficient manner. The benefits that the application and use of CRS&SI technologies can provide to improve and expedite the traffic investigation part of the EIS process are presented.

  4. Measurements of Diesel Truck Traffic Associated with Goods Movement

    E-Print Network [OSTI]

    Houston, Douglas; Krudysz, Margaret; Winer, Arthur

    2007-01-01T23:59:59.000Z

    Concentrations of PM2.5 and Diesel Exhaust Particles onPatterns of Measured Port Diesel Traffic. (a) Intersectionof particulate emissions from diesel engines: a review’, J.

  5. Optimization Online - Test instances for the traffic assignment problem

    E-Print Network [OSTI]

    Frédéric Babonneau

    Abstract: This short note on the Traffic Assignment Problem (TAP) provides the relevant information on test problems previously used in the literature to facilitate

  6. Optimization Online - Ship Traffic Optimization for the Kiel Canal

    E-Print Network [OSTI]

    Elisabeth Lübbecke

    2014-12-01T23:59:59.000Z

    Dec 1, 2014 ... ... optimization problem which we call the ship traffic control problem (STCP). ... We offer a unified view of routing and scheduling which blends ...

  7. V-201: Cisco Intrusion Prevention System SSP Fragmented Traffic...

    Energy Savers [EERE]

    traffic could allow an unauthenticated, remote attacker to cause the Analysis Engine process to become unresponsive or cause the affected system to reload. REFERENCE...

  8. The Specification and Execution of Heterogeneous Synchronous Reactive Systems

    E-Print Network [OSTI]

    The Specification and Execution of Heterogeneous Synchronous Reactive Systems by Stephen Anthony in Engineering---Electrical Engineering and Computer Sciences in the GRADUATE DIVISION of the UNIVERSITY of Heterogeneous Synchronous Reactive Systems Copyright ã 1997 by Stephen Anthony Edwards #12; Abstract

  9. Turbo synchronization : an EM algorithm interpretation , C. Herzet

    E-Print Network [OSTI]

    Steendam, Heidi

    Turbo synchronization : an EM algorithm interpretation N. Noels* , C. Herzet , A. Dejonghe , V is devoted to turbo synchronization, that is to say the use of soft information to estimate parameters like carrier phase, frequency offset or timing within a turbo receiver. It is shown how maximum

  10. Joint Synchronization and Decoding Exploiting the Turbo Principle

    E-Print Network [OSTI]

    Regalia, Phillip A.

    Joint Synchronization and Decoding Exploiting the Turbo Principle John M. Walsh and C. Richard´el´ecommunications/GET 91011 Evry cedex France Abstract-- This paper investigates turbo methods for joint synchronization and decoding in pulse amplitude modulated (PAM) systems. We begin with a brief review of the turbo principle

  11. Behavioral/Systems/Cognitive Resonant Synchronization in Heterogeneous Networks of

    E-Print Network [OSTI]

    De Schutter, Erik

    with subclasses of inhibitory neurons firing phase- locked to, and often thought to generate, the rhythm (Bragin,reflectingfinitespikepropagationandsynaptictransmissiontimes.Attheresonantlevelofnetwork excitation, all neurons fire synchronously and rhythmically with a period approximately four times the mean intrinsic reso- nance can synchronize their spikes with zero phase lag, provided a finite delay separates

  12. Processus communicants Communication synchrone CSP/CCS/-calcul

    E-Print Network [OSTI]

    Grigoras, .Romulus

    Processus communicants Communication synchrone CSP/CCS/-calcul Rendez-vous étendu Ada Huitième partie Processus communicants CSP/Ada Systèmes concurrents 2 / 44 #12;Processus communicants Communication synchrone CSP/CCS/-calcul Rendez-vous étendu Ada Principes Synchronisation Désignation

  13. Probabilistic Analysis of Disagreement in Synchronous Consensus Protocols (Preliminary draft)

    E-Print Network [OSTI]

    Karlsson, Johan

    for improving traffic safety and fuel-efficiency of road vehicles, such as vehicle platooning, virtual traffic-efficient autonomous manoeuvring of air vehicles. We are interested in investigating the possibility of using simple that demand fast and reliable real-time consensus include autonomous and semi-autonomous cooperative systems

  14. Phase synchronization analysis by assessment of the phase difference gradient Martin Vejmelka

    E-Print Network [OSTI]

    Savicky, Petr

    of rhythms of self-sustained oscillatory systems. Typically when trying to identify phase synchronization of coupled self-sustained oscillatory systems, phase synchronization, given by a relation

  15. E-Print Network 3.0 - area synchronized phasor Sample Search...

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

    words: phasor measurement unit; synchronized phasor; dynamic behavior; power grid; step test... voltage and current phasors at reporting times synchronized to Coordinated...

  16. Post processing large integer programming problems in air traffic flow management

    E-Print Network [OSTI]

    Gangadharan, Rajesh

    1994-01-01T23:59:59.000Z

    The Federal Aviation Administration is keen to develop new strategies for air traffic control, in order to better tackle the numerous problems arising due to increasing traffic in the national air space. The Traffic Flow Management (TFM) problem...

  17. Road traffic accidents in Kathmandu¿an hour of education yields a glimmer of hope

    E-Print Network [OSTI]

    Basnet, Bibhusan; Vohra, Rais; Bhandari, Amit; Pandey, Subash

    2013-01-01T23:59:59.000Z

    et al. : Road traffic accidents in Kathmandu— an hour ofOpen Access Road traffic accidents in Kathmandu—an hour ofnumber of road traffic accidents in the year 2012 decreased

  18. Web services synchronization health care application

    E-Print Network [OSTI]

    Limam, Hela

    2011-01-01T23:59:59.000Z

    With the advance of Web Services technologies and the emergence of Web Services into the information space, tremendous opportunities for empowering users and organizations appear in various application domains including electronic commerce, travel, intelligence information gathering and analysis, health care, digital government, etc. In fact, Web services appear to be s solution for integrating distributed, autonomous and heterogeneous information sources. However, as Web services evolve in a dynamic environment which is the Internet many changes can occur and affect them. A Web service is affected when one or more of its associated information sources is affected by schema changes. Changes can alter the information sources contents but also their schemas which may render Web services partially or totally undefined. In this paper, we propose a solution for integrating information sources into Web services. Then we tackle the Web service synchronization problem by substituting the affected information sources....

  19. Geometric Programming and Mechanism Design for Air Traffic Conflict Resolution

    E-Print Network [OSTI]

    Pappas, George J.

    methods in air traffic control. The problem considered concerns the scheduling of the crossing times traffic controller (ATC). In this setting, numerous conflict resolution methods have been proposed have different valuations for the additional delays imposed by the ATC, and might be willing

  20. Increasing Air Traffic: What is the Problem? Areski Hadjaz

    E-Print Network [OSTI]

    Boyer, Edmond

    Increasing Air Traffic: What is the Problem? Areski Hadjaz Thales Air Systems, Rungis, France Email: areski.hadjaz@thalesgroup.com Ga´etan Marceau Thales Air Systems and TAO, Rungis, France Email: gaetan efforts are made to modernize the air traffic management systems to cope with uncertainty, complexity

  1. Analysis of Elephant Users in Broadband Network Traffic

    E-Print Network [OSTI]

    Molnár, Sándor

    Analysis of Elephant Users in Broadband Network Traffic P´eter Megyesi and S´andor Moln´ar High,molnar}@tmit.bme.hu Abstract. Elephant and mice phenomena of network traffic flows have been an interesting research area is caused by a small percentage of large flows, called the elephants. In this paper, we investigate the same

  2. Joint Traffic Blocking and Routing under Network Failures and Maintenances

    E-Print Network [OSTI]

    Liu, Yong

    Joint Traffic Blocking and Routing under Network Failures and Maintenances Chao Liang ECE Dept paths. Therefore, it is important to design ingress traffic blocking and routing jointly to achieve a good balance between the two factors. Working towards this goal, we formulate a joint ingress blocking

  3. Piezoelectric energy harvesting from traffic-induced bridge vibrations

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Piezoelectric energy harvesting from traffic-induced bridge vibrations Micha¨el Peigney1 harvesting of traffic-induced vibrations in bridges. Using a pre-stressed concrete highway bridge as a case of cantilever piezoelectric harvester was designed, tested, and modeled. Even though the considered bridge

  4. Traffic flow models and service rules for complex production systems

    E-Print Network [OSTI]

    Ringhofer, Christian

    Traffic flow models and service rules for complex production systems C. Ringhofer Abstract We emphasis is given to the implementation of service rules for complex systems, involving multiple product flow type models for complex production systems. Traffic flow models represent, in some sense

  5. Jetway: Minimizing Costs on Inter-Datacenter Video Traffic

    E-Print Network [OSTI]

    Li, Baochun

    Jetway: Minimizing Costs on Inter-Datacenter Video Traffic Yuan Feng, Baochun Li Department deploy a number of datacenters inter-connected by high-capacity links, spanning different geographical-to-customer video serving, constitutes a large portion of a cloud provider's inter- datacenter traffic. Charged

  6. Traffic Analysis: From Stateful Firewall to Network Intrusion Detection System

    E-Print Network [OSTI]

    Chiueh, Tzi-cker

    1 Traffic Analysis: From Stateful Firewall to Network Intrusion Detection System Fanglu Guo Tzi normalization. Index Terms Packet (traffic) analysis, stateful firewall, network intrusion detection system intrusion detection system (NIDS). Stateful firewall analyzes packets up to their layer 4 headers while NIDS

  7. Guest Editorial Traffic classification and its applications to modern networks

    E-Print Network [OSTI]

    Mellia, Marco

    , such as the enforcement of quality of service guarantees or traffic engineering, and of security issues such as intrusion use of encryption techniques, make the measurement, analysis and classifica- tion of Internet traffic are being published here: ``Targeting Spam Control on Middleboxes: Spam Detection Based on Layer-3 E- mail

  8. E-Print Network 3.0 - annual average daily traffic Sample Search...

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

    Data Systems 2000. Annual Average Daily Truck Traffic on the California State... Lockout and Non-Lockout Weekdays Average Daily Traffic Volume (vehday) All Cars Trucks ......

  9. E-Print Network 3.0 - average daily traffic Sample Search Results

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

    Data Systems 2000. Annual Average Daily Truck Traffic on the California State... Lockout and Non-Lockout Weekdays Average Daily Traffic Volume (vehday) All Cars Trucks...

  10. E-Print Network 3.0 - airport surface traffic control Sample...

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

    20 Technical Report Documentation Page 1. Report No. Summary: of airports. The defining document for traffic control devices is the Manual on Uniform Traffic Control... code can...

  11. Genetic fuzzy logic approach to local ramp metering control using microscopic traffic simulation.

    E-Print Network [OSTI]

    Yu, Xue Feng

    2009-01-01T23:59:59.000Z

    ??Ramp metering, one of the most effective solutions for improving motorway traffic flows, is playing increasingly important role in traffic management systems. Because of its… (more)

  12. E-Print Network 3.0 - accidents traffic Sample Search Results

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

    in traffic accidents (N 146) and in the general... . Correlation between relative risk of traffic ... Source: Flegr, Jaroslav - Department of Philosophy and History of...

  13. E-Print Network 3.0 - air traffic operations Sample Search Results

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

    Page: << < 1 2 3 4 5 > >> 1 Visualization of Air Traffic Flow for Modeling and Control Applications Banavar Sridhar and Kapil Sheth Summary: Visualization of Air Traffic...

  14. E-Print Network 3.0 - air traffic flow Sample Search Results

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

    flow Page: << < 1 2 3 4 5 > >> 1 Visualization of Air Traffic Flow for Modeling and Control Applications Banavar Sridhar and Kapil Sheth Summary: Visualization of Air Traffic...

  15. Synchronous motor with soft start element formed between the motor rotor and motor output shaft to successfully synchronize loads that have high inertia and/or high torque

    DOE Patents [OSTI]

    Umans, Stephen D; Nisley, Donald L; Melfi, Michael J

    2014-10-28T23:59:59.000Z

    A line-start synchronous motor has a housing, a rotor shaft, and an output shaft. A soft-start coupling portion is operatively coupled to the output shaft and the rotor shaft. The soft-start coupling portion is configurable to enable the synchronous motor to obtain synchronous operation and to drive, at least near synchronous speed during normal steady state operation of the motor, a load having characteristics sufficient to prevent obtaining normal synchronous operation of the motor when the motor is operatively connected to the load in the absence of the soft-start coupling. The synchronous motor is sufficiently rated to obtain synchronous operation and to drive, at least near synchronous speed during normal steady state operation of the motor, a load having characteristics sufficient to prevent obtaining normal synchronous operation of the motor when the motor is operatively connected to the load in the absence of the soft-start coupling.

  16. Predictability of road traffic and congestion in urban areas

    E-Print Network [OSTI]

    Wang, Jingyuan; Li, Jing; Li, Chao; Xiong, Zhang; Wang, Wen-Xu

    2014-01-01T23:59:59.000Z

    Mitigating traffic congestion on urban roads, with paramount importance in urban development and reduction of energy consumption and air pollution, depends on our ability to foresee road usage and traffic conditions pertaining to the collective behavior of drivers, raising a significant question: to what degree is road traffic predictable in urban areas? Here we rely on the precise records of daily vehicle mobility based on GPS positioning device installed in taxis to uncover the potential daily predictability of urban traffic patterns. Using the mapping from the degree of congestion on roads into a time series of symbols and measuring its entropy, we find a relatively high daily predictability of traffic conditions despite the absence of any a priori knowledge of drivers' origins and destinations and quite different travel patterns between weekdays and weekends. Moreover, we find a counterintuitive dependence of the predictability on travel speed: the road segment associated with intermediate average travel ...

  17. Equivalent synchronization of chaos in driven and in autonomous systems

    E-Print Network [OSTI]

    M. G. Cosenza; O. Alvarez-Llamoza; G. Paredes

    2010-05-17T23:59:59.000Z

    It is shown that the synchronization behavior of a system of chaotic maps subject to either an external forcing or a coupling function of their internal variables can be inferred from the behavior of a single element in the system, which can be seen as a single drive-response map. From the conditions for stable synchronization in this single driven-map model with minimal ingredients, we find minimal conditions for the emergence of complete and generalized chaos synchronization in both driven and autonomous associated systems. Our results show that the presence of a common drive or a coupling function for all times is not indispensable for reaching synchronization in a system of chaotic oscillators, nor is the simultaneous sharing of a field, either external or endogenous, by all the elements. In the case of an autonomous system, the coupling function does not need to depend on all the internal variables for achieving synchronization and its functional form is not crucial for generalized synchronization. What becomes essential for reaching synchronization in an extended system is the sharing of some minimal information by its elements, on the average, over long times, independently of the nature (external or internal) of its source.

  18. Time Synchronization Attack in Smart Grid-Part II: Cross Layer Detection Mechanism

    E-Print Network [OSTI]

    Zhang, Zhenghao; Dimitrovski, Aleksandar D; Li, Husheng

    2012-01-01T23:59:59.000Z

    A novel time synchronization attack (TSA) on wide area monitoring systems in smart grid has been identified in the first part of this paper. A cross layer detection mechanism is proposed to combat TSA in part II of this paper. In the physical layer, we propose a GPS carrier signal noise ratio (C/No) based spoofing detection technique. In addition, a patch-monopole hybrid antenna is applied to receive GPS signal. By computing the standard deviation of the C/No difference from two GPS receivers, a priori probability of spoofing detection is fed to the upper layer, where power system state is estimated and controlled. A trustworthiness based evaluation method is applied to identify the PMU being under TSA. Both the physical layer and upper layer algorithms are integrated to detect the TSA, thus forming a cross layer mechanism. Experiment is carried out to verify the effectiveness of the proposed TSA detection algorithm.

  19. Traffic Light Protocol: WHITE Traffic Light Protocol: WHITE (information may be distributed without restriction, subject to copyright controls.)

    E-Print Network [OSTI]

    Thomas, Andrew

    the event for their gain. The Threats: Internet watch groups and cyber security experts have already potential cyber threats please visit the Center for Internet Security website at CISecurity.org. #12;Traffic Light Protocol: WHITE Traffic Light Protocol: WHITE (information may be distributed without

  20. Cluster synchronization in networks of neurons with chemical synapses

    SciTech Connect (OSTI)

    Juang, Jonq, E-mail: jjuang@math.nctu.edu.tw [Department of Applied Mathematics, and Center of Mathematics Modeling and Scientific Computing, National Chiao Tung University, Hsinchu, Taiwan and National Center for Theoretical Sciences, Hsinchu, Taiwan (China)] [Department of Applied Mathematics, and Center of Mathematics Modeling and Scientific Computing, National Chiao Tung University, Hsinchu, Taiwan and National Center for Theoretical Sciences, Hsinchu, Taiwan (China); Liang, Yu-Hao, E-mail: moonsea.am96g@g2.nctu.edu.tw [Department of Mathematics, National Tsing Hua University, Hsinchu, Taiwan (China)] [Department of Mathematics, National Tsing Hua University, Hsinchu, Taiwan (China)

    2014-03-15T23:59:59.000Z

    In this work, we study the cluster synchronization of chemically coupled and generally formulated networks which are allowed to be nonidentical. The sufficient condition for the existence of stably synchronous clusters is derived. Specifically, we only need to check the stability of the origins of m decoupled linear systems. Here, m is the number of subpopulations. Examples of nonidentical networks such as Hindmarsh-Rose (HR) neurons with various choices of parameters in different subpopulations, or HR neurons in one subpopulation and FitzHugh-Nagumo neurons in the other subpopulation are provided. Explicit threshold for the coupling strength that guarantees the stably cluster synchronization can be obtained.

  1. Cancellation of TorqueRipple Due to Nonidealitiesof PermanentMagnet SynchronousMachine Drives

    E-Print Network [OSTI]

    Chapman, Patrick

    -magnet synchronous application than the predecessors. Further, the technique is machine (PMSM) drives dictates

  2. Failure Detection with Booting in Partially Synchronous Systems

    E-Print Network [OSTI]

    Failure Detection with Booting in Partially Synchronous Systems Josef Widder1 , G´erard Le Lann2 implementation with respect to failure detection time, but also works during the system booting phase. 1

  3. Parameter Mismatches, Chaos Synchronization and Fast Dynamic Logic Gates

    E-Print Network [OSTI]

    E. M. Shahverdiev

    2009-07-02T23:59:59.000Z

    By using chaos synchronization between non-identical multiple time delay semiconductor lasers with optoelectronic feedbacks, we demonstrate numerically how fast dynamic logic gates can be constructed. The results may be helpful to obtain a computational hardware with reconfigurable properties.

  4. Synchronized Collective Behavior via Low-cost Communication

    E-Print Network [OSTI]

    Hai-Tao Zhang; Michael ZhiQiang Chen; Tao Zhou

    2007-07-23T23:59:59.000Z

    An important natural phenomenon surfaces that satisfactory synchronization of self-driven particles can be achieved via sharply reduced communication cost, especially for high density particle groups with low external noise. Statistical numerical evidence illustrates that a highly efficient manner is to distribute the communication messages as evenly as possible along the whole dynamic process, since it minimizes the communication redundancy. More surprisingly, it is discovered that there exist some abnormal regions where moderately decreasing the communication cost can even improve the synchronization performance. A phase diagram on the noise-density parameter space is given, where the dynamical behaviors can be divided into three qualitatively different phases: normal phase where better synchronization corresponds to higher communication cost, abnormal phase where moderately decreasing communication cost could even improve the synchronization, and the disordered phase where no coherence among individuals is observed.

  5. Synchronized flux corrected remapping for ALE methods Richard Liska a,

    E-Print Network [OSTI]

    Liska, Richard

    simultaneously to treat all quanti- ties in the system at once, thus we call our method synchronized FCR (SFCR). The SFCR method has been developed in [13] for mass and momentum with bounds in density and velocity. Here

  6. Permanent magnet assisted synchronous reluctance motor, design and performance improvement

    E-Print Network [OSTI]

    Niazi, Peyman

    2006-04-12T23:59:59.000Z

    Recently, permanent magnet assisted (PMa)-synchronous reluctance motors (SynRM) have been considered as a possible alternative motor drive for high performance applications. In order to have an efficient motor drive, performing of three steps...

  7. Performance analysis of synchronous machines under dynamic eccentricity

    E-Print Network [OSTI]

    Al-Nuaim, Nabil Abdulaziz

    1996-01-01T23:59:59.000Z

    The performance of salient pole synchronous machines under eccentric rotors is studied. Relationships between stator and rotor current induced harmonics and dynamic eccentricity are investigated. The winding function theory has been modified...

  8. Experimental Synchronization of Spatiotemporal Chaos in Nonlinear Optics

    E-Print Network [OSTI]

    P. L. Ramazza; U. Bortolozzo; S. Boccaletti

    2005-02-10T23:59:59.000Z

    We demonstrate that a unidirectional coupling between a pattern forming system and its replica induces complete synchronization of the slave to the master system onto a spatiotemporal chaotic state.

  9. Transient Peak Currents in Permanent Magnet Synchronous Motors

    E-Print Network [OSTI]

    Paderborn, Universität

    synchronous motors (PMSM) became more and more popular for these applications. The performance of PMSM drives not be triggered at motor operating points, for which the SSC current behavior will damage the PMSM drive. An analysis of PMSM behavior with

  10. Projective synchronization in fractional order chaotic systems and its control

    E-Print Network [OSTI]

    Chunguang Li

    2006-04-24T23:59:59.000Z

    The chaotic dynamics of fractional (non-integer) order systems have begun to attract much attention in recent years. In this paper, we study the projective synchronization in two coupled fractional order chaotic oscillators. It is shown that projective synchronization can also exist in coupled fractional order chaotic systems. A simple feedback control method for controlling the scaling factor onto a desired value is also presented.

  11. Low latency memory access and synchronization

    DOE Patents [OSTI]

    Blumrich, Matthias A. (Ridgefield, CT); Chen, Dong (Croton On Hudson, NY); Coteus, Paul W. (Yorktown Heights, NY); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Hoenicke, Dirk (Ossining, NY); Ohmacht, Martin (Brewster, NY); Steinmacher-Burow, Burkhard D. (Mount Kisco, NY); Takken, Todd E. (Mount Kisco, NY), Vranas; Pavlos M. (Bedford Hills, NY)

    2010-10-19T23:59:59.000Z

    A low latency memory system access is provided in association with a weakly-ordered multiprocessor system. Bach processor in the multiprocessor shares resources, and each shared resource has an associated lock within a locking device that provides support for synchronization between the multiple processors in the multiprocessor and the orderly sharing of the resources. A processor only has permission to access a resource when it owns the lock associated with that resource, and an attempt by a processor to own a lock requires only a single load operation, rather than a traditional atomic load followed by store, such that the processor only performs a read operation and the hardware locking device performs a subsequent write operation rather than the processor. A simple prefetching for non-contiguous data structures is also disclosed. A memory line is redefined so that in addition to the normal physical memory data, every line includes a pointer that is large enough to point to any other line in the memory, wherein the pointers to determine which memory line to prefetch rather than some other predictive algorithm. This enables hardware to effectively prefetch memory access patterns that are non-contiguous, but repetitive.

  12. Low latency memory access and synchronization

    DOE Patents [OSTI]

    Blumrich, Matthias A. (Ridgefield, CT); Chen, Dong (Croton On Hudson, NY); Coteus, Paul W. (Yorktown Heights, NY); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Hoenicke, Dirk (Ossining, NY); Ohmacht, Martin (Brewster, NY); Steinmacher-Burow, Burkhard D. (Mount Kisco, NY); Takken, Todd E. (Mount Kisco, NY); Vranas, Pavlos M. (Bedford Hills, NY)

    2007-02-06T23:59:59.000Z

    A low latency memory system access is provided in association with a weakly-ordered multiprocessor system. Each processor in the multiprocessor shares resources, and each shared resource has an associated lock within a locking device that provides support for synchronization between the multiple processors in the multiprocessor and the orderly sharing of the resources. A processor only has permission to access a resource when it owns the lock associated with that resource, and an attempt by a processor to own a lock requires only a single load operation, rather than a traditional atomic load followed by store, such that the processor only performs a read operation and the hardware locking device performs a subsequent write operation rather than the processor. A simple prefetching for non-contiguous data structures is also disclosed. A memory line is redefined so that in addition to the normal physical memory data, every line includes a pointer that is large enough to point to any other line in the memory, wherein the pointers to determine which memory line to prefetch rather than some other predictive algorithm. This enables hardware to effectively prefetch memory access patterns that are non-contiguous, but repetitive.

  13. Visualization of Traffic Flow and Atmospheric Pollutant Flow in Urban Areas

    E-Print Network [OSTI]

    Tokyo, University of

    and air pollutants using polygons and translucent particles. The system is applied for public roads around.transport.iis.u-tokyo.ac.jp CCity modelity model Air pollutionAir pollution simsim.. TrafficTraffic simsim.. CCity modelity model Air pollutionAir pollution simsim.. TrafficTraffic simsim.. #12;

  14. The impact of gasoline price changes on traffic safety: a time geography explanation Guangqing Chi a,

    E-Print Network [OSTI]

    Levinson, David M.

    The impact of gasoline price changes on traffic safety: a time geography explanation Guangqing Chi, United States a r t i c l e i n f o Keywords: Time geography Gasoline prices Traffic safety Traffic crashes Fatal crashes Space­time path a b s t r a c t The impact of gasoline price changes on traffic

  15. ForPeerReview Traffic Congestion and Air Pollution Exposure for Motorists

    E-Print Network [OSTI]

    Bertini, Robert L.

    outcomes (Health Effects Institute 2010), but the effects of traffic congestion on travelers' exposure

  16. Author's personal copy Impacts of freeway traffic conditions on in-vehicle exposure to ultrafine

    E-Print Network [OSTI]

    Bertini, Robert L.

    particulate matter (Health Effects Institute, 2010). Traffic congestion, in particular, has been cited

  17. Design and testing of a roadside traffic threat alerting mechanism

    E-Print Network [OSTI]

    Powale, Pallavi

    2013-01-01T23:59:59.000Z

    Every year, law enforcement officials, emergency personnel, and other workers stopped in traffic outside their vehicles are struck by inattentive drivers. Until now, most efforts to prevent these types of accidents have ...

  18. Notes and comments Impacts of traffic heterogeneity on roadside air

    E-Print Network [OSTI]

    Illinois at Chicago, University of

    a discrete traffic kinematic wave model formulated by Daganzo (1994, 1995). This model provides a cell-based solution, termed the cell-transmission (CT) recipe, to the kinematic wave model. It introduces a simplistic

  19. automated mixed traffic: Topics by E-print Network

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

    technology, are to increase the safety and through-put of the existing highway by traffic automation. Advanced Vehicle Control... Huandra, Rusli 1998-01-01 46 Cognitive Engineering...

  20. Texas Safe Communities Texans Discovering Traffic Safety Solutions

    E-Print Network [OSTI]

    Texas Safe Communities Texans Discovering Traffic Safety Solutions Texas A&M AgriLife Extension their cell phones while driving. The survey found that during daylight hours, the number of people using cell

  1. Design of long span modular bridges for traffic detours

    E-Print Network [OSTI]

    Potapova, Svetlana (Svetlana S.)

    2009-01-01T23:59:59.000Z

    The oncoming large amount of bridge replacements in the next 10 to 20 years called for a detailed examination of available replacement schemes which can have variable impact on user costs. Detouring traffic with a modular ...

  2. Development and Evaluation of a Novel Traffic Friendly Commuter Vehicle

    E-Print Network [OSTI]

    Minnesota, University of

    Development and Evaluation of a Novel Traffic Friendly Commuter Vehicle Rajesh Rajamani Department What solutions do researchers in the automotive industry and researchers in the vehicle dynamics lanes - Vehicles will travel together in closely- packed "platoons". Dedicated to automated vehicles

  3. Robust Decision-Support Tools for Airport Surface Traffic

    E-Print Network [OSTI]

    Carr, Francis R.

    Forecasts of departure demand are one of the driving inputs to tactical decision-support tools (DSTs) for airport surface traffic. While there are well-known results on average- or worst-case forecast uncertainty, it is ...

  4. Robust decision-support tools for airport surface traffic

    E-Print Network [OSTI]

    Carr, Francis R. (Francis Russell), 1976-

    2004-01-01T23:59:59.000Z

    Forecasts of departure demand are one of the driving inputs to tactical decision-support tools (DSTs) for airport surface traffic. While there are well-known results on average- or worst-case forecast uncertainty, it is ...

  5. Anti-eavesdropping communication layer to protect against traffic analysis

    E-Print Network [OSTI]

    Shen, Yiping

    2002-01-01T23:59:59.000Z

    In this thesis, we present unicast and multicast protocols to resist eavesdropping and traffic profiling of group communications. At the application layer, we propose a secret-sharing approach for the exchange of shared keys. That is, multicast...

  6. Intelligent Cruise Control design based on a traffic flow specification

    E-Print Network [OSTI]

    Huandra, Rusli

    1998-01-01T23:59:59.000Z

    The principal objectives of the Automated Highway graphics. System (AHS), an Intelligent Transportation System (ITS) technology, are to increase the safety and through-put of the existing highway by traffic automation. Advanced Vehicle Control...

  7. Real-Time Traffic Information for Emergency Evacuations

    SciTech Connect (OSTI)

    Franzese, Oscar [ORNL] [ORNL; Zhang, Li [Mississippi State University (MSU)] [Mississippi State University (MSU); Mahmoud, Anas M. [Mississippi State University (MSU)] [Mississippi State University (MSU)

    2010-01-01T23:59:59.000Z

    There are many instances in which it is possible to plan ahead for an emergency evacuation (e.g., a chemical processing facility explosion). For those cases, if an accident were to happen, then the best evacuation plan for the prevailing network and weather conditions would be deployed. In other cases (e.g., the derailment of a train transporting hazardous materials), there may not be any previously developed plan to be implemented, and decisions must be made ad-hoc on how to proceed with an emergency evacuation. In both situations, the availability of real-time traffic information plays a critical role in the management of the evacuation operations. Due to cost constraints, only large urban areas have traffic sensor deployments that permit access to some sort of real-time traffic information; an evacuation taking place in other areas of the country would have to proceed without real-time traffic information. In order to improve operations during a vehicular emergency evacuation anywhere, a system of sensors that uses newly developed real-time traffic-information-gathering technologies to assess traffic conditions and to detect incidents on the main evacuation routes is presented in this paper. A series of tests, both in a controlled environment and in the field, were conducted to study the feasibility of such a system of traffic sensors and to assess its ability to provide real-time traffic information during an emergency evacuation. The results of these tests indicated that the prototype sensors are reliable and accurate for the type of application that is the focus of this paper.

  8. Design and analysis of an ATM network traffic security device

    E-Print Network [OSTI]

    Teodor, Dan Cristian

    1997-01-01T23:59:59.000Z

    and retransmit the network traffic from one ATM network switch output port. The Receivers queue the incoming data from the ATM network switch and present the data to the Analysis Modules in manageable pieces. The Analysis Modules capture the data from... at an exponential rate. With the continuation of this growth, the requirements of providing uniform security management will become more and more difficult to manage without occupying a significant portion of the network traffic capability available to the end...

  9. Structural and safety characteristics and warrants for highway traffic barriers

    E-Print Network [OSTI]

    Kohutek, Terry Lee

    1975-01-01T23:59:59.000Z

    Ross Highway traffic barriers are highway appurtenances that provide vehicle occupants with a relative degree of protection from roadside hazards and from errant vehicles encroaching across a median. The six basic types of traffic barr1ers are roads... are decision criteria that 1dentify sites along highways that need traff1c barrier installations. Structural and safety character- istics of the barr1ers refer to the impact performance, the structural integrity, and the safety of the vehicle occupants upon...

  10. Simulations of highway traffic with various degrees of automation

    SciTech Connect (OSTI)

    Doss, E.; Hanebutte, U.; Vitela, J.; Brown-VanHoozer, A.; Ewing, T.; Tentner, A.

    1996-10-01T23:59:59.000Z

    A traffic simulator to study highway traffic under various degrees of automation is being developed at Argonne National Laboratory (ANL). The key components of this simulator include a global and a local Expert Drive Mode, a human factor study and a graphical user interface. Further, an Autonomous Intelligent Cruise Control (AICC) which is based on a neural network controller is described and results for a typical driving scenario are given.

  11. Simulation of vehicle traffic on an automatic highway system.

    SciTech Connect (OSTI)

    Hanebutte, U.; Doss, E.; Ewing, T.; Tentner, A.; Technology Development

    1998-01-01T23:59:59.000Z

    A traffic simulator has been developed at Argonne National Laboratory to study highway traffic under various degrees of automation. The key components of this simulator include a global and a local Expert Driver Model, a human factor study, and a graphical user interface. Furthermore, an Autonomous Intelligent Cruise Control, which is based on a neural network controller, is described and results for two typical driving scenarios are given.

  12. T.T.T.Nguyen, G.Armitage, A Survey of Techniques for Internet Traffic Classification using Machine Learning A Survey of Techniques for Internet Traffic

    E-Print Network [OSTI]

    Armitage, Grenville

    of their various business goals. Traffic classification may be a core part of automated intrusion detection systemsT.T.T.Nguyen, G.Armitage, A Survey of Techniques for Internet Traffic Classification using Machine Learning A Survey of Techniques for Internet Traffic Classification using Machine Learning Thuy T.T. Nguyen

  13. Synchronization in Complex Oscillator Networks and Smart Grids

    SciTech Connect (OSTI)

    Dorfler, Florian [Los Alamos National Laboratory; Chertkov, Michael [Los Alamos National Laboratory; Bullo, Francesco [Center for Control, Dynamical Systems and Computation, University of California at Santa Babara, Santa Barbara CA

    2012-07-24T23:59:59.000Z

    The emergence of synchronization in a network of coupled oscillators is a fascinating topic in various scientific disciplines. A coupled oscillator network is characterized by a population of heterogeneous oscillators and a graph describing the interaction among them. It is known that a strongly coupled and sufficiently homogeneous network synchronizes, but the exact threshold from incoherence to synchrony is unknown. Here we present a novel, concise, and closed-form condition for synchronization of the fully nonlinear, non-equilibrium, and dynamic network. Our synchronization condition can be stated elegantly in terms of the network topology and parameters, or equivalently in terms of an intuitive, linear, and static auxiliary system. Our results significantly improve upon the existing conditions advocated thus far, they are provably exact for various interesting network topologies and parameters, they are statistically correct for almost all networks, and they can be applied equally to synchronization phenomena arising in physics and biology as well as in engineered oscillator networks such as electric power networks. We illustrate the validity, the accuracy, and the practical applicability of our results in complex networks scenarios and in smart grid applications.

  14. Synchronization in Complex Oscillator Networks and Smart Grids

    E-Print Network [OSTI]

    Florian Dörfler; Michael Chertkov; Francesco Bullo

    2012-07-31T23:59:59.000Z

    The emergence of synchronization in a network of coupled oscillators is a fascinating topic in various scientific disciplines. A coupled oscillator network is characterized by a population of heterogeneous oscillators and a graph describing the interaction among them. It is known that a strongly coupled and sufficiently homogeneous network synchronizes, but the exact threshold from incoherence to synchrony is unknown. Here we present a novel, concise, and closed-form condition for synchronization of the fully nonlinear, non-equilibrium, and dynamic network. Our synchronization condition can be stated elegantly in terms of the network topology and parameters, or equivalently in terms of an intuitive, linear, and static auxiliary system. Our results significantly improve upon the existing conditions advocated thus far, they are provably exact for various interesting network topologies and parameters, they are statistically correct for almost all networks, and they can be applied equally to synchronization phenomena arising in physics and biology as well as in engineered oscillator networks such as electric power networks. We illustrate the validity, the accuracy, and the practical applicability of our results in complex networks scenarios and in smart grid applications.

  15. HVDC control system based on parallel digital signal processors

    SciTech Connect (OSTI)

    Maharsi, Y.; Do, V.Q.; Sood, V.K.; Casoria, S.; Belanger, J. [Hydro-Quebec, Varennes, Quebec (Canada)] [Hydro-Quebec, Varennes, Quebec (Canada)

    1995-05-01T23:59:59.000Z

    A numerical HVDC control system operating in real time has been developed for a simulator to be used for operator training. The control system, implemented with digital signal processors (DSPs), consists of typical HVDC control functions such as the synchronizing unit, the regulation unit, the protection unit, the firing unit, the tap changer and the reactive power regulation unit. Results from the steady-state and the transient performance validation tests carried out on the IREQ power system simulator are provided.

  16. Synchronization of organ pipes by means of air flow coupling: experimental observations and modeling

    E-Print Network [OSTI]

    Abel, M; Gerhard-Multhaupt, R

    2005-01-01T23:59:59.000Z

    We report measurements on two organ pipes positioned side by side. We investigate two different questions. First, the mutual influence of two pipes with different pitch. In analogy to the coupling of two nonlinear oscillators with feedback, one observes a frequency locking, which can be explained by synchronization theory. Second, we measure the dependence of the frequency of the signals emitted by two mutually detuned pipes with varying distance between the pipes. The spectrum shows a broad ``hump'' structure, not found for coupled oscillators. This indicates a complicated hydrodynamical coupling of the two jets creating the acoustic field when exiting from the pipe mouth. We interpret our acoustic measurements with a model for the flow which exits from the flues of the pipes.

  17. Note: Synchronous energy extraction through four output ports of microwave compressor

    SciTech Connect (OSTI)

    Avgustinovich, V. A.; Artemenko, S. N.; Novikov, S. A.; Yushkov, Yu. G. [Tomsk Polytechnic University, 2-a Lenina, Tomsk 634050 (Russian Federation)

    2013-06-15T23:59:59.000Z

    The energy stored in a resonant cavity was extracted through four output ports and added in phase in a common line. Operation of a single switch provided synchronism and the power portions transmitted through the ports were combined in a waveguide turnstile junction. Estimation shows that the compressor peak power can reach a value eight times as much as the switched wave power, provided the output pulsewidth is shortened by the same factor with reference to the cavity double transit time. The performance of the X-band compressor prototype was investigated. Signals radiated through each of four output ports had identical envelope shapes and equal peak power values. The reflected wave did not accompany the power combining. The pulses of 1.2 MW peak power and 1.6 ns pulse width were obtained when the compressor was driven by the 50 kW pulse power magnetron generator.

  18. Time Synchronization in Hierarchical TESLA Wireless Sensor Networks

    SciTech Connect (OSTI)

    Jason L. Wright; Milos Manic

    2009-08-01T23:59:59.000Z

    Time synchronization and event time correlation are important in wireless sensor networks. In particular, time is used to create a sequence events or time line to answer questions of cause and effect. Time is also used as a basis for determining the freshness of received packets and the validity of cryptographic certificates. This paper presents secure method of time synchronization and event time correlation for TESLA-based hierarchical wireless sensor networks. The method demonstrates that events in a TESLA network can be accurately timestamped by adding only a few pieces of data to the existing protocol.

  19. Magnetic levitation configuration incorporating levitation, guidance and linear synchronous motor

    DOE Patents [OSTI]

    Coffey, H.T.

    1993-10-19T23:59:59.000Z

    A propulsion and suspension system for an inductive repulsion type magnetically levitated vehicle which is propelled and suspended by a system which includes propulsion windings which form a linear synchronous motor and conductive guideways, adjacent to the propulsion windings, where both combine to partially encircling the vehicle-borne superconducting magnets. A three phase power source is used with the linear synchronous motor to produce a traveling magnetic wave which in conjunction with the magnets propel the vehicle. The conductive guideway combines with the superconducting magnets to provide for vehicle levitation. 3 figures.

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

    E-Print Network [OSTI]

    Noh, Kyoung Lae

    2009-05-15T23:59:59.000Z

    presents significant energy saving. Finally, this dissertation introduces a novel adaptive time synchronization protocol, named the Adaptive Multi-hop Timing Synchronization (AMTS). According to the current network status, AMTS optimizes crucial network...

  1. Analysis of electrical signatures in synchronous generators characterized by bearing faults

    E-Print Network [OSTI]

    Choi, Jae-Won

    2009-05-15T23:59:59.000Z

    Synchronous generators play a vital role in power systems. One of the major mechanical faults in synchronous generators is related to bearings. The popular vibration analysis method has been utilized to detect bearing faults for years. However...

  2. Correspondence-free Synchronization and Reconstruction in a Non-rigid Scene

    E-Print Network [OSTI]

    Wolf, Lior

    sections. First, we show how to synchronize two vidoe 2 #12;sequences. 1.1 Previous work Using several

  3. Passivity-based control of a wound-rotor synchronous Arnau D`oria-Cerezoa

    E-Print Network [OSTI]

    Batlle, Carles

    of using a WRSM in front of the permanent magnet synchronous motor (PMSM), is the ability to compensate

  4. Project Information Form Project Title Using Connected Vehicle Technology for Advanced Signal Control

    E-Print Network [OSTI]

    California at Davis, University of

    ,387 Total Project Cost $59,387 Agency ID or Contract Number DTRT13-G-UTC29 Start and End Dates 4/14/2014 ­ 9Project Information Form Project Title Using Connected Vehicle Technology for Advanced Signal/30/15 Brief Description of Research Project Today's conventional traffic control strategies typically rely

  5. Increasing the Capacity of Signalized Intersections5 with Separate Left Turn Phases6

    E-Print Network [OSTI]

    Kammen, Daniel M.

    traffic on all the lanes upstream of an4 intersection using a mid-block pre-signal. If drivers behave, the reorganization is so drastic that it may be6 counterintuitive to drivers. This can be remedied by reorganizing significantly, even if drivers behave randomly and only8 one lane is reorganized. The paper shows how

  6. Signal Control for Oversaturated Intersections Using Fuzzy Logic Ph.D. Candidate

    E-Print Network [OSTI]

    Prevedouros, Panos D.

    05-0156 Signal Control for Oversaturated Intersections Using Fuzzy Logic Lin Zhang Ph.D. Candidate in 9 exhibits 7,110 words total (max = 7500) #12;Zhang, Li, and Prevedouros 1 ABSTRACT The fuzzy logic controller (FLC) presented in this paper simulates the control logic of experienced human traffic controllers

  7. Regulation and Synchronization of the Master Circadian Clock by Purinergic Signaling from Suprachiasmatic Nucleus Astrocytes

    E-Print Network [OSTI]

    Womac, Alisa Diane

    2012-10-19T23:59:59.000Z

    in coordinating system-level physiological rhythms that are entrained to environmental light cues. Many of these neurons and glia are individual circadian oscillators, and the cellular mechanisms that couple them into ensemble oscillations are emerging. Adenosine...

  8. Computer Based Motor Parameter Determination for High Speed Operation of Permanent Magnet Synchronous Machines

    E-Print Network [OSTI]

    Szabados, Barna

    Synchronous Machines B. Szabados and U. Schaible McMaster University 1280 Main St. W., Hamilton, Ontario PM synchronous machine parameters in the high speed operating range. The theory and real interior PM synchronous machine at up to 8000 rpm. Results are presented which show a significant variation

  9. Ad Hoc Synchronization Considered Harmful Weiwei Xiong+, Soyeon Park, Jiaqi Zhang, Yuanyuan Zhou, Zhiqiang Ma*

    E-Print Network [OSTI]

    Zhou, Yuanyuan

    Ad Hoc Synchronization Considered Harmful Weiwei Xiong+, Soyeon Park, Jiaqi Zhang, Yuanyuan Zhou Abstract Many synchronizations in existing multi­threaded pro­ grams are implemented in an ad hoc way. The first part of this paper does a comprehensive characteristic study of ad hoc synchronizations

  10. Control strategy of a variable speed wind turbine with multipole permanent magnet synchronous generator

    E-Print Network [OSTI]

    values. Keywords: permanent magnet synchronous generator, variable speed wind turbine, direct driven wind). A multipole synchronous generator connected to a power converter can operate at low speeds, so that a gear canControl strategy of a variable speed wind turbine with multipole permanent magnet synchronous

  11. Dynamic Motor Parameter Identification for High Speed Flux Weakening Operation of Brushless Permanent Magnet Synchronous Machines

    E-Print Network [OSTI]

    Szabados, Barna

    performance torque control. Advanced high speed salient-pole synchronous machine drives use vector control Permanent Magnet Synchronous Machines Abstract: An experimental investigation is conducted to determine the behaviour of brushless PM synchronous machine parameters in the high speed flux weakening operating range

  12. A Synchronous Approach to Reactive System Design1 Charles Andr

    E-Print Network [OSTI]

    André, Charles

    our experience teaching discrete-event reactive systems to Electrical Engineering students. The courseA Synchronous Approach to Reactive System Design1 Charles André I3S Laboratory ­ UNSA/CNRS BP 121 This paper was presented at the 12th EAEEIE Annual Conf., 14-16 May 2001, Nancy (France). Abstract Reactive

  13. Synchronization of PPM over Wideband Multipath Dana Porrat

    E-Print Network [OSTI]

    Porrat, Dana

    of Electrical Engineering University of Southern California Los Angeles, CA USA ubli@ucs.edu Abstract amount of multi-path in UWB radio channels, methods for harnessing such diversity when the channel potential. We have shown in [6] that in the limit of large bandwidth, threshold based synchronizers cannot

  14. Communication using Synchronization of Chaos in Semiconductor Lasers with optoelectronic

    E-Print Network [OSTI]

    Illing, Lucas

    Communication using Synchronization of Chaos in Semiconductor Lasers with optoelectronic feedback S. The Chaos in the single-mode semiconductor lasers is generated by means of an optoelectronic feedback with optoelectronic feedback has been demonstrated for quite slow data rates by using chaotic wavelength fluctuations

  15. Exploring Synchronization in Complex Oscillator Networks Florian Dorfler Francesco Bullo

    E-Print Network [OSTI]

    Bullo, Francesco

    Exploring Synchronization in Complex Oscillator Networks Florian D¨orfler Francesco Bullo Abstract work supported by NSF grants IIS- 0904501 and CPS-1135819. Florian D¨orfler and Francesco Bullo: {dorfler,bullo}@engineering.ucsb.edu a phase angle i S1 and has a preferred natural rotation frequency i

  16. Synchronization of Power Networks: Network Reduction and Effective Resistance

    E-Print Network [OSTI]

    Bullo, Francesco

    Synchronization of Power Networks: Network Reduction and Effective Resistance Florian D¨orfler Barbara, Santa Barbara, CA 93106 USA (e-mail: {dorfler,bullo}@engineering.ucsb.edu). Abstract in a network-reduced power system. Among other things, D¨orfler and Bullo (2010b) provided a solution

  17. Conditions for synchronization in Josephson-junction arrays

    SciTech Connect (OSTI)

    Chernikov, A.A.; Schmidt, G. [Stevens Institute of Technology, Hoboken, New Jersey 07030 (United States)] [Stevens Institute of Technology, Hoboken, New Jersey 07030 (United States)

    1995-10-01T23:59:59.000Z

    An effective perturbation theoretical method has been developed to study the dynamics of Josephson-junction series arrays. It is shown that the inclusion of junction capacitances, which is often ignored, has a significant impact on synchronization. Comparison of analytic with computational results over a wide range of parameters shows excellent agreement.

  18. ESC: Energy Synchronized Communication in Sustainable Sensor Networks

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    ESC: Energy Synchronized Communication in Sustainable Sensor Networks Yu Gu, Ting Zhu and Tian He Abstract--With advances in energy harvesting techniques, it is now feasible to build sustainable sensor of sustainable sensor networks is to effectively utilize a continuous stream of ambient energy. Instead

  19. Attack-Resilient Time Synchronization for Wireless Sensor Networks

    E-Print Network [OSTI]

    Yener, Aylin

    Attack-Resilient Time Synchronization for Wireless Sensor Networks Hui Song, Sencun Zhu in sensor networks were not designed with security in mind, thus leaving them vulnerable to security attacks. In this paper, we first identify various attacks that are effective to several representative time

  20. Semantic Synchronization in a Persistent Object System Library

    E-Print Network [OSTI]

    Wolf, Alexander L.

    constraints on a database, and the database management system (DBMS) synchronizes concurrent transactions transactions. Most commonly, a DBMS uses a two-phase locking protocol to enforce serializability. Each transaction requests locks according to the protocol, and the DBMS evaluates each request for con ict

  1. Leakage-Aware Energy Synchronization for Wireless Sensor Networks

    E-Print Network [OSTI]

    Zhang, Zhi-Li

    Leakage-Aware Energy Synchronization for Wireless Sensor Networks Ting Zhu, Ziguo Zhong, Yu Gu-capacitor as the only energy storage unit. To efficiently use the harvested energy, we design and imple- ment leakage-aware con- trol can effectively utilize energy that could otherwise leak away. Nodes running leakage-aware

  2. Synchronization of Turbo Codes Based on Online Statistics

    E-Print Network [OSTI]

    Valenti, Matthew C.

    Synchronization of Turbo Codes Based on Online Statistics Jian Sun and Matthew C. Valenti Wireless 26506-6109 email: [jian,mvalenti]@csee.wvu.edu, phone: 304-293-0405, fax: 304-293-8602 Abstract-- Turbo. Since turbo codes are intended to be deployed in environments with very low SNR, conventional

  3. INNOVATIVE CONCEPTS FOR ON-LINE SYNCHRONOUS GENERATOR PARAMETER ESTIMATION

    E-Print Network [OSTI]

    and other routine power engineering studies. These studies are critical for the operation of the power temperature, magnetic saturation, and coupling between the generator and external systems. The method proposed and on a simplified synchronous generator model. The method is developed to be used with a Visual C++ engine

  4. Communication and Synchronization in Multithreaded Reconfigurable Computing Systems

    E-Print Network [OSTI]

    Hellebrand, Sybille

    design technique of modeling hardware accelerators as passive co- processors to the system CPU operating system services, instead of passive coprocessors that can simply be called from software levels: First, hardware circuits need to communicate and synchronize on a low level with the operating

  5. Synthesis of Parallel Hardware Implementations from Synchronous Dataflow Graph Specifications

    E-Print Network [OSTI]

    of automated register­transfer level (RTL) VHDL code generation from synchronous dataflow (SDF) graph for mapping applications specified in SDF to parallel digital hardware implementations. Two styles synthesis from SDF graphs is presented. In order to minimize cost while meeting performance require­ ments

  6. Synchronous Black Hole Search in Directed Graphs Adrian Kosowski

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Synchronous Black Hole Search in Directed Graphs Adrian Kosowski Alfredo Navarra Cristina M called black hole nodes, and once a robot enters in one of them, it is destroyed. The goal is to find supported by the Italian CNR Short-Term Mobility Program. A. Kosowski was supported Polish Ministry Grant N

  7. Conditions for synchronization in Josephson-junction arrays

    SciTech Connect (OSTI)

    Chernikov, A.A.; Schmidt, G. [Stevens Institute of Technology, Hoboken, NJ (United States)

    1995-12-31T23:59:59.000Z

    An effective perturbation theoretical method has been developed to study the dynamics of Josephson Junction series arrays. It is shown that the inclusion of Junction capacitances, often ignored, has a significant impact on synchronization. Comparison of analytic with computational results over a wide range of parameters shows excellent agreement.

  8. Position sensor for linear synchronous motors employing halbach arrays

    DOE Patents [OSTI]

    Post, Richard Freeman

    2014-12-23T23:59:59.000Z

    A position sensor suitable for use in linear synchronous motor (LSM) drive systems employing Halbach arrays to create their magnetic fields is described. The system has several advantages over previously employed ones, especially in its simplicity and its freedom from being affected by weather conditions, accumulated dirt, or electrical interference from the LSM system itself.

  9. SUPER HIGH-SPEED MINIATURIZED PERMANENT MAGNET SYNCHRONOUS MOTOR

    E-Print Network [OSTI]

    Wu, Thomas

    with the design of permanent magnet synchronous motors (PMSM) to operate at super-high speed with high efficiency. The designed and fabricated PMSM was successfully tested to run upto 210,000 rpm The designed PMSM has 2000 W concept of electrical machines. After that, the modeling of PMSM for dynamic simulation is provided

  10. Permanent Magnets Synchronous Machines Faults Detection and Identification

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    for permanent magnet synchronous machines (PMSM). Two main faults occurring on these machines are identified of the PMSM is devel- oped and simulated using Matlab Simulink. The model enables simulating nominal and faulty PMSM behavior, with several stages of degradation, and is supported by tests results. Specific

  11. Dynamic programming applied to maximizing traffic flow in parallel systems

    E-Print Network [OSTI]

    Anderson, Gerald Lee

    1967-01-01T23:59:59.000Z

    Solution of the problem The Triple-Route Model 33 CHAPTER I INTRODUCTION The control of traffic flow and congestion in freeway systems is a matter of increasing importance at a time when it. has become evident that it is impossible to construct... enough urban highway- to satisfy all of the traffic demand. It is necessary to seek ways to make more efficient u. e of existing freeways. Nattleworth (1, 2) and others (3, 4, 5, 6) have discussed various aspects of the control of freeway systems...

  12. E-Print Network 3.0 - airport traffic Sample Search Results

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

    section IV.A.2). If the airport's traffic is heavily geared toward O&D traffic, then demand... for maximizing this economic activity include maximizing passenger volumes and...

  13. Critical enhancements of a dynamic traffic assignment model for highly congested, complex urban network

    E-Print Network [OSTI]

    Wei, Zheng, S.M. Massachusetts Institute of Technology

    2010-01-01T23:59:59.000Z

    To accurately replicate the highly congested traffic situation of a complex urban network, significant challenges are posed to current simulation-based dynamic traffic assignment (DTA) models. This thesis discusses these ...

  14. The integration of Automatic Speech Recognition into the Air Traffic Control system

    E-Print Network [OSTI]

    Karlsson Joakim

    1990-01-01T23:59:59.000Z

    Today, the Air Traffic Control (ATC) system relies primarily on verbal communication between the air traffic controllers and the pilots of the aircraft in the controlled airspace. Although a computer system exists that ...

  15. E-Print Network 3.0 - advanced air traffic Sample Search Results

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

    air traffic Page: << < 1 2 3 4 5 > >> 1 Advances in Adaptive Data Analysis Vol. 2, No. 1 (2010) 8196 Summary: FORECASTING THE AIR TRAFFIC FOR NORTH-EAST INDIAN CITIES C....

  16. E-Print Network 3.0 - air traffic Sample Search Results

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

    Pollutant Flow in Urban Areas Summary: .transport.iis.u-tokyo.ac.jp CCity modelity model Air pollutionAir pollution simsim.. TrafficTraffic simsim.. CCity modelity model... Air...

  17. Simultaneous calibration of a microscopic traffic simulation model and OD matrix

    E-Print Network [OSTI]

    Kim, Seung-Jun

    2006-10-30T23:59:59.000Z

    With the recent widespread deployment of intelligent transportation systems (ITS) in North America there is an abundance of data on traffic systems and thus an opportunity to use these data in the calibration of microscopic traffic simulation models...

  18. E-Print Network 3.0 - air traffic services Sample Search Results

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

    Logic for Miles-In-Trail Summary: This paper presents an algorithm which can be used for scheduling arrival air traffic in an Air Route Traffic... (FAA) is in the midst of...

  19. E-Print Network 3.0 - advanced automation system air traffic...

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

    burdened air traffic control (ATC) systems that are at or near their desig- nated maximum handling... of ground-based ATC but to use automation to support air traffic...

  20. E-Print Network 3.0 - air traffic control Sample Search Results

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

    Powered by Explorit Topic List Advanced Search Sample search results for: air traffic control Page: << < 1 2 3 4 5 > >> 1 Visualization of Air Traffic Flow for Modeling and...

  1. A Microscopic Traffic Simulation Model for Transportation Planning in Georgios Papageorgiou, Pantelis Damianou, Andreas Pitsilides

    E-Print Network [OSTI]

    Pitsillides, Andreas

    A Microscopic Traffic Simulation Model for Transportation Planning in Cyprus Georgios Papageorgiou. This paper presents the microscopic simulation model development of a major traffic network of Nicosia simulation model is developed and utilized for transportation planning. 1. Introduction The demand

  2. Boise Air Traffic Control Tower: High Performance and sustainable Building Guiding Principles Technical Assistance

    SciTech Connect (OSTI)

    Fowler, Kimberly M.; Goel, Supriya; Henderson, Jordan W.

    2013-09-01T23:59:59.000Z

    Overview of energy efficiency opportunities for new FAA tower construction using the Boise Air Traffic Control Tower as an example.

  3. U-134: Apache Traffic Server Host Header Processing Flaw Lets Remote Users Deny Service

    Broader source: Energy.gov [DOE]

    A vulnerability was reported in Apache Traffic Server. A remote user can cause denial of service conditions.

  4. Multimodal Traffic at Isolated Signalized Intersections: New Management Strategies to Increase Capacity

    E-Print Network [OSTI]

    Xuan, Yiguang; Gayah, Vikash; Daganzo, Carlos; Cassidy, Michael

    2009-01-01T23:59:59.000Z

    passenger car equivalents (pce’s): buses are counted as 1.7phase; 7 and then combined to obtain a single pce value.estimates of maximum pce counts per cycle (capacities) are

  5. Development and evaluation of an arterial adaptive traffic signal control system using reinforcement learning

    E-Print Network [OSTI]

    Xie, Yuanchang

    2009-05-15T23:59:59.000Z

    control. Two different implementation schemes are considered. The first scheme uses a fixed phase sequence and variable cycle length, while the second one optimizes phase sequence in real time and is not constrained to the concept of cycle. Both schemes...

  6. Study on the relationship between left-turn traffic operations and safety at signalized intersections

    E-Print Network [OSTI]

    Lee, Sunghoon

    2009-06-02T23:59:59.000Z

    ............................................................ 6? FIGURE 3 Regression Lines and Averaged Data for Model B2 ..................................... 21? FIGURE 4 Regression Lines for Model B4 ..................................................................... 21? FIGURE 5 Left-turn Accident... Distribution ..................................................................... 30? FIGURE 6 Box Plot of the Number of Accidents for Left-Turn Type ............................ 35? FIGURE 7 Box Plot of Number of Crashes for Each Phasing Sequence...

  7. Time-delayed coupled chaotic semiconductor lasers show new types of synchronization: Experiment and theory

    E-Print Network [OSTI]

    Aviad, Y; Zigzag, M; Rosenbluh, M; Kanter, I

    2011-01-01T23:59:59.000Z

    Topologies of two, three and four time-delay-coupled chaotic semiconductor lasers are experimentally and theoretically found to show new types of synchronization. Shifted zero-lag synchronization is observed for two lasers separated by long distances even when their self-feedback delays are not equal. Shifted sub-lattice synchronization is observed for quadrilateral geometries while the equilateral triangle is zero-lag synchronized. Generalized zero-lag synchronization, without the limitation of precisely matched delays, opens possibilities for advanced multi-user communication protocols.

  8. Time-delayed coupled chaotic semiconductor lasers show new types of synchronization: Experiment and theory

    E-Print Network [OSTI]

    Y. Aviad; I. Reidler; M. Zigzag; M. Rosenbluh; I. Kanter

    2011-11-28T23:59:59.000Z

    Topologies of two, three and four time-delay-coupled chaotic semiconductor lasers are experimentally and theoretically found to show new types of synchronization. Shifted zero-lag synchronization is observed for two lasers separated by long distances even when their self-feedback delays are not equal. Shifted sub-lattice synchronization is observed for quadrilateral geometries while the equilateral triangle is zero-lag synchronized. Generalized zero-lag synchronization, without the limitation of precisely matched delays, opens possibilities for advanced multi-user communication protocols.

  9. Review of Urban Bicyclists' Intake and Uptake of Traffic-Related Air Pollution

    E-Print Network [OSTI]

    Bertini, Robert L.

    Review of Urban Bicyclists' Intake and Uptake of Traffic-Related Air Pollution ALEXANDER Y. BIGAZZI- clists may experience increased inhalation of traffic-related air pollutants. Bicyclists have two to five regarding urban bicyclists' intake and uptake of traffic-related air pollution and to identify key knowledge

  10. Review of Urban Bicyclists' Intake and Uptake of Traffic-Related Air Pollution

    E-Print Network [OSTI]

    Bertini, Robert L.

    1 Review of Urban Bicyclists' Intake and Uptake of Traffic-Related Air Pollution Alexander Y of Traffic-Related Air Pollution Abstract Bicycling as a mode of transportation is enjoying a boost in many while bicycling, bicyclists may experience increased inhalation of traffic-related air pollutants

  11. Air Traffic Complexity Resolution in Multi-Sector Planning Using CP

    E-Print Network [OSTI]

    Flener, Pierre

    Air Traffic Complexity Resolution in Multi-Sector Planning Using CP Pierre Flener1 Justin Pearson1 Programming for ATC & ATM, Brétigny (France), 2 December 2008 #12;Objective Air Traffic Complexity Complexity Resolution A CP Model Experiments Conclusion Outline 1 Objective 2 Air Traffic Complexity 3 Complexity

  12. Air traffic complexity and the interacting particle system method: An integrated approach for collision risk estimation

    E-Print Network [OSTI]

    Del Moral , Pierre

    Air traffic complexity and the interacting particle system method: An integrated approach explore the possibility of using air traffic complexity metrics to accelerate the Interacting Particle to assess the performance and impact of, e.g., possible modifications of the current air traffic management

  13. The inhomogeneous kinematic wave traffic flow model as a resonant nonlinear system

    E-Print Network [OSTI]

    Mease, Kenneth D.

    The inhomogeneous kinematic wave traffic flow model as a resonant nonlinear system December, 2000 W 95616 Abstract The kinematic wave traffic flow model for an inhomogeneous road is studied as a resonant conform to expectations. Introduction The kinematic wave traffic flow model of LWR was introduced

  14. Bounding Peer-to-Peer Upload Traffic in Client Networks Chun-Ying Huang

    E-Print Network [OSTI]

    Chen, Sheng-Wei

    interest. However, as the amount of peer-to- peer traffic increases, a network administrator would like for such network traffic. Second, as any one can develop their own protocols, even if network administratorsBounding Peer-to-Peer Upload Traffic in Client Networks Chun-Ying Huang National Taiwan University

  15. Realistic network traffic profile generation: theory and practice Antoine Varet1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , "realistic behavior" means to generate traffic similar to the traffic a network administrator can captureRealistic network traffic profile generation: theory and practice Antoine Varet1 & Nicolas Larrieu1-mail: nicolas.larrieu@enac.fr Abstract Network engineers and designers need additional tools to generate network

  16. weber, evans, moser, and newell Air Traffic Management Decision Support During Convective Weather

    E-Print Network [OSTI]

    Reuter, Martin

    · weber, evans, moser, and newell Air Traffic Management Decision Support During Convective WeatherTraffic Management Decision Support During Convective Weather Mark E. Weber, James E. Evans, William R. Moser algorithm. #12;· weber, evans, moser, and newell Air Traffic Management Decision Support During Convective

  17. Self-learning IP Traffic Classification based on Statistical Flow Characteristics

    E-Print Network [OSTI]

    Zander, Sebastian

    and intrusion detection. The most common identification technique based on the inspection of `known port numbers or encrypted traffic. The authors of [1] propose signature-based methods to classify P2P traffic. AlthoughSelf-learning IP Traffic Classification based on Statistical Flow Characteristics Sebastian Zander1

  18. Gasoline price effects on traffic safety in urban and rural areas: Evidence from Minnesota, 19982007

    E-Print Network [OSTI]

    Levinson, David M.

    Gasoline price effects on traffic safety in urban and rural areas: Evidence from Minnesota, 1998 February 2012 Received in revised form 3 May 2013 Accepted 24 May 2013 Keywords: Gasoline prices Traffic examines the role of gasoline prices in the occurrence of traffic crashes. However, no studies have

  19. Estimating Emissions in Latin America: An Alternative to Traffic Models

    E-Print Network [OSTI]

    Richner, Heinz

    Estimating Emissions in Latin America: An Alternative to Traffic Models Margarita Ossés de Eicker; Hans Hurni, Centre for Development and Environment (CDE), University of Bern, Switzerland Emissions allow precise estimations of these emissions but are too expensive for a broad application. A simplifed

  20. Measuring Bicyclists' Uptake of Traffic-Related Air Pollution

    E-Print Network [OSTI]

    Bertini, Robert L.

    Measuring Bicyclists' Uptake of Traffic-Related Air Pollution Alex Bigazzi PSU Transportation Seminar Feb. 28, 2014 Miguel Figliozzi Jim Pankow Wentai Luo Lorne Isabelle Urban Bicyclists' Pollution Uptake 1 #12;Bicycle & Health Promotion Public Health Exercise CrashesPollution Emissions Exposure/ Dose

  1. A categorical model for traffic incident likelihood estimation

    E-Print Network [OSTI]

    Kuchangi, Shamanth

    2007-04-25T23:59:59.000Z

    In this thesis an incident prediction model is formulated and calibrated. The primary idea of the model developed is to correlate the expected number of crashes on any section of a freeway to a set of traffic stream characteristics, so that a...

  2. Traffic Light Mapping and Detection Nathaniel Fairfield Chris Urmson

    E-Print Network [OSTI]

    Tomkins, Andrew

    by lines painted on the road, traffic lights indicate precedence at intersections, brake lights show when, are becoming common- place as part of commercial driver-assistance systems. With power steering, power brakes obstructions or false positives such as those induced by the brake lights of other vehicles. Happily, both

  3. Incentive-based Caching Mechanisms for Overlay Traffic Management

    E-Print Network [OSTI]

    Chatziantoniou, Damianos

    and Business Burkhard Stiller, Professor, Department of Informatics, University of Zurich Examination Committee Pussep, Robert Wojcik, Jerzy Domzal, Dirk Staehle, Frank Lehrieder, Burkhard Stiller, Assessment. Papafili, P. Racz, S. Soursos, D. Staehle, G. D. Stamoulis, P. Tran-Gia, B. Stiller, An Economic Traffic

  4. Caution, drivers! Children present. Traffic, pollution, and infant health

    E-Print Network [OSTI]

    Rothman, Daniel

    air pollution levels on infant health? Our setting is California (with a focus on the Central ValleyCaution, drivers! Children present. Traffic, pollution, and infant health Christopher R. Knittel driving (and especially congestion) on ambient air pollution levels; and (2) what is the impact of modern

  5. 1997 Hui Zhang 1 LIRA: Service Differentiation for Traffic

    E-Print Network [OSTI]

    Zhang, Hui

    1 1997 Hui Zhang 1 Carnegie Mellon LIRA: Service Differentiation for Traffic Aggregates With Large Spatial Granularities Ion Stoica Hui Zhang School of Computer Science Carnegie Mellon University 1997 Hui Simulation experiments l Conclusions and future work #12; 2 1997 Hui Zhang 3 Carnegie Mellon Motivation l

  6. 1997 Hui Zhang 1 LIRA: Service Differentiation for Traffic

    E-Print Network [OSTI]

    Zhang, Hui

    1 1997 Hui Zhang 1 Carnegie Mellon LIRA: Service Differentiation for Traffic Aggregates With Large Spatial Granularities Ion Stoica Hui Zhang School of Computer Science Carnegie Mellon University 1997 Hui Simulation experiments q Conclusions and future work #12;2 1997 Hui Zhang 3 Carnegie Mellon Motivation q

  7. Real-Time Traffic Information for Emergency Evacuation Operations

    E-Print Network [OSTI]

    Real-Time Traffic Information for Emergency Evacuation Operations Research Brief Oak Ridge National Environment Safety Security Vehicle Technologies T here are many instances in which it is possible to plan. The system of sensors will transmit through satellite links, or other robust communication means, real

  8. Apparatus, system, and method for synchronizing a timer key

    DOE Patents [OSTI]

    Condit, Reston A; Daniels, Michael A; Clemens, Gregory P; Tomberlin, Eric S; Johnson, Joel A

    2014-04-22T23:59:59.000Z

    A timer key relating to monitoring a countdown time of a countdown routine of an electronic device is disclosed. The timer key comprises a processor configured to respond to a countdown time associated with operation of the electronic device, a display operably coupled with the processor, and a housing configured to house at least the processor. The housing has an associated structure configured to engage with the electronic device to share the countdown time between the electronic device and the timer key. The processor is configured to begin a countdown routine based at least in part on the countdown time, wherein the countdown routine is at least substantially synchronized with a countdown routine of the electronic device when the timer key is removed from the electronic device. A system and method for synchronizing countdown routines of a timer key and an electronic device are also disclosed.

  9. Synchronous parallel kinetic Monte Carlo Diffusion in Heterogeneous Systems

    SciTech Connect (OSTI)

    Martinez Saez, Enrique [Los Alamos National Laboratory; Hetherly, Jeffery [Los Alamos National Laboratory; Caro, Jose A [Los Alamos National Laboratory

    2010-12-06T23:59:59.000Z

    A new hybrid Molecular Dynamics-kinetic Monte Carlo algorithm has been developed in order to study the basic mechanisms taking place in diffusion in concentrated alloys under the action of chemical and stress fields. Parallel implementation of the k-MC part based on a recently developed synchronous algorithm [1. Compo Phys. 227 (2008) 3804-3823] resorting on the introduction of a set of null events aiming at synchronizing the time for the different subdomains, added to the parallel efficiency of MD, provides the computer power required to evaluate jump rates 'on the flight', incorporating in this way the actual driving force emerging from chemical potential gradients, and the actual environment-dependent jump rates. The time gain has been analyzed and the parallel performance reported. The algorithm is tested on simple diffusion problems to verify its accuracy.

  10. Spontaneous synchronization driven by energy transport in interconnected networks

    E-Print Network [OSTI]

    Vincenzo Nicosia; Per Sebastian Skardal; Vito Latora; Alex Arenas

    2015-02-26T23:59:59.000Z

    Understanding dynamical processes on networks is an important area of research in complex systems, with far reaching implications and applications in many real-world cases. Here we introduce and study a model of intertwined dynamics on interconnected networks, inspired by the human brain, which consists of bidirectionally coupled synchronization and energy transport processes. Remarkably, the proposed model allows the emergence of spontaneous switch-like synchronization transitions driven by the energy transport dynamics, which qualitatively mirror the transitions observed in human brain dynamics between resting-state and cognitive activity. We provide a steady-state analytical explanation for the observed behavior and show that the switch-like transition is robust over a wide range of model parameters and network topologies. Finally, we suggest that the complexity inherent in other interconnected dynamical processes might be responsible for various other emergent behaviors observed in natural systems.

  11. Synchronization of piece-wise continuous systems of fractional order

    E-Print Network [OSTI]

    Marius-F. Danca

    2014-08-19T23:59:59.000Z

    The aim of this study is to prove analytically that synchronization of a piece-wise continuous class of systems of fractional order can be achieved. Based on our knowledge, there are no numerical methods to integrate differential equations with discontinuous right hand side of fractional order which model these systems. Therefore, via Filippov's regularization [1] and Cellina's Theorem [2,3], we prove that the initial value problem can be converted into a continuous problem of fractional-order, to which numerical methods for fractional orders apply. In this way, the synchronization problem transforms into a standard problem for continuous systems of fractional order. Three examples of fractional-order piece-wise systems are considered: Sprott system, Chen and Shimizu-Morioka system.

  12. Kuramoto model of synchronization: Equilibrium and nonequilibrium aspects

    E-Print Network [OSTI]

    Shamik Gupta; Alessandro Campa; Stefano Ruffo

    2014-08-27T23:59:59.000Z

    Recently, there has been considerable interest in the study of spontaneous synchronization, particularly within the framework of the Kuramoto model. The model comprises oscillators with distributed natural frequencies interacting through a mean-field coupling, and serves as a paradigm to study synchronization. In this review, we put forward a general framework in which we discuss in a unified way known results with more recent developments obtained for a generalized Kuramoto model that includes inertial effects and noise. We describe the model from a different perspective, highlighting the long-range nature of the interaction between the oscillators, and emphasizing the equilibrium and out-of-equilibrium aspects of its dynamics from a statistical physics point of view. In the first main section, we introduce the model and discuss for the noiseless and noisy dynamics and unimodal frequency distributions the synchronization transition that occurs in the stationary state. In the second section, we introduce the generalized model, and discuss its synchronization phase diagram for unimodal frequency distributions. In the third section, we describe deviations from the mean-field setting of the Kuramoto model by considering the generalized dynamics on a one-dimensional periodic lattice on the sites of which the oscillators reside and interact with a coupling that decays as an inverse power-law of their separation. For two specific cases, namely, in the absence of noise and inertia, and in the case when the natural frequencies are the same for all the oscillators, we discuss how the long-time transition to synchrony is governed by the dynamics of the mean-field mode (zero Fourier mode) of the spatial distribution of the oscillator phases.

  13. The complex planetary synchronization structure of the solar system

    E-Print Network [OSTI]

    Nicola Scafetta

    2014-01-16T23:59:59.000Z

    The complex planetary synchronization structure of the solar system, which since Pythagoras of Samos (ca. 570-495 BC) is known as the music of the spheres, is briefly reviewed from the Renaissance up to contemporary research. Copernicus' heliocentric model from 1543 suggested that the planets of our solar system form a kind of mutually ordered and quasi-synchronized system. From 1596 to 1619 Kepler formulated preliminary mathematical relations of approximate commensurabilities among the planets, which were later reformulated in the Titius-Bode rule (1766-1772) that successfully predicted the orbital position of Ceres and Uranus. Following the discovery of the ~11 yr sunspot cycle, in 1859 Wolf suggested that the observed solar variability could be approximately synchronized with the orbital movements of Venus, Earth, Jupiter and Saturn. Modern research have further confirmed that: (1) the planetary orbital periods can be approximately deduced from a simple system of resonant frequencies; (2) the solar system oscillates with a specific set of gravitational frequencies, and many of them (e.g. within the range between 3 yr and 100 yr) can be approximately constructed as harmonics of a base period of ~178.38 yr; (3) solar and climate records are also characterized by planetary harmonics from the monthly to the millennia time scales. This short review concludes with an emphasis on the contribution of the author's research on the empirical evidences and physical modeling of both solar and climate variability based on astronomical harmonics. The general conclusion is that the solar system works as a resonator characterized by a specific harmonic planetary structure that synchronizes also the Sun's activity and the Earth's climate.

  14. Laser synchronized high-speed shutter for spectroscopic application

    DOE Patents [OSTI]

    Miles, Paul C. (Tracy, CA); Porter, Eldon L. (Tracy, CA); Prast, Thomas L. (Livermore, CA); Sunnarborg, Duane A. (Livermore, CA)

    2002-01-01T23:59:59.000Z

    A fast mechanical shutter, based on rotating chopper wheels, has been designed and implemented to shutter the entrance slit of a spectrograph. This device enables an exposure time of 9 .mu.s to be achieved for a 0.8 mm wide spectrograph entrance slit, achieves 100% transmission in the open state, and an essentially infinite extinction ratio. The device further incorporates chopper wheel position sensing electronics to permit the synchronous triggering of a laser source.

  15. Complex network synchronization of chaotic systems with delay coupling

    SciTech Connect (OSTI)

    Theesar, S. Jeeva Sathya, E-mail: sjstheesar@gmail.com; Ratnavelu, K., E-mail: sjstheesar@gmail.com [Network Science Research Group, Institute of Mathematical Sciences, University of Malaya, 50603, Kuala Lumpur (Malaysia)

    2014-03-05T23:59:59.000Z

    The study of complex networks enables us to understand the collective behavior of the interconnected elements and provides vast real time applications from biology to laser dynamics. In this paper, synchronization of complex network of chaotic systems has been studied. Every identical node in the complex network is assumed to be in Lur’e system form. In particular, delayed coupling has been assumed along with identical sector bounded nonlinear systems which are interconnected over network topology.

  16. Sensitivity of OFDM Systems to Synchronization Errors and Spatial Diversity

    E-Print Network [OSTI]

    Zhou, Yi

    2012-02-14T23:59:59.000Z

    of observations. Computer simulations show that the asymptotic bound is tight with more than 64 observations. Therefore, a good bench- mark for comparing the performance of different timing synchronizers is obtained. The selection of several system design.... 4. The curve marked with circles represents the actual ICI power from computer simulations while the curve with stars denotes the upper bound derived in (A.11). Fig. 4 illustrates that the derived upper bound predicts very accurately the ICI power...

  17. Generation of synchronized trains of picosecond laser pulses at two wavelengths in a single-cavity synchronously mode-locked dye laser

    E-Print Network [OSTI]

    Rocca, Jorge J.

    -cavity synchronously mode-locked dye laser 0. Buccafusca, J. J. Rocca, M. C. Marconi, and C. S. Menoni National Science-cavity synchronously pumped dye laser containing a mixture of two dyes in a single jet and intracavity spatial masking for frequency selection. The utilization of this dual wavelength dye laser to monitor the relaxation

  18. A peaks-over-threshold analysis of extreme traffic load effects on bridges Franziska Schmidt, Xiao Yi Zhou, Franois Toutlemonde

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    extreme traffic load or traffic load effect. These are: i. a half-normal curve fitted to the end1 A peaks-over-threshold analysis of extreme traffic load effects on bridges Franziska Schmidt focuses on modeling and estimating tail parameters of bridge traffic load effects by generalized Pareto

  19. Atypical Behavior Identification in Large Scale Network Traffic

    SciTech Connect (OSTI)

    Best, Daniel M.; Hafen, Ryan P.; Olsen, Bryan K.; Pike, William A.

    2011-10-23T23:59:59.000Z

    Cyber analysts are faced with the daunting challenge of identifying exploits and threats within potentially billions of daily records of network traffic. Enterprise-wide cyber traffic involves hundreds of millions of distinct IP addresses and results in data sets ranging from terabytes to petabytes of raw data. Creating behavioral models and identifying trends based on those models requires data intensive architectures and techniques that can scale as data volume increases. Analysts need scalable visualization methods that foster interactive exploration of data and enable identification of behavioral anomalies. Developers must carefully consider application design, storage, processing, and display to provide usability and interactivity with large-scale data. We present an application that highlights atypical behavior in enterprise network flow records. This is accomplished by utilizing data intensive architectures to store the data, aggregation techniques to optimize data access, statistical techniques to characterize behavior, and a visual analytic environment to render the behavioral trends, highlight atypical activity, and allow for exploration.

  20. Hamiltonian traffic dynamics in microfluidic-loop networks

    E-Print Network [OSTI]

    Raphaël Jeanneret; Julien Piera-Vest; Denis Bartolo

    2011-09-28T23:59:59.000Z

    Recent microfluidic experiments revealed that large particles advected in a fluidic loop display long-range hydrodynamic interactions. However, the consequences of such couplings on the traffic dynamics in more complex networks remain poorly understood. In this letter, we focus on the transport of a finite number of particles in one-dimensional loop networks. By combining numerical, theoretical, and experimental efforts, we evidence that this collective process offers a unique example of Hamiltonian dynamics for hydrodynamically interacting particles. In addition, we show that the asymptotic trajectories are necessarily reciprocal despite the microscopic traffic rules explicitly break the time reversal symmetry. We exploit these two remarkable properties to account for the salient features of the effective three-particle interaction induced by the exploration of fluidic loops.

  1. Speci cation and Veri cation of a Steam-Boiler with Signal-Coq Micka l Kerb uf1

    E-Print Network [OSTI]

    Boyer, Edmond

    Speci cation and Veri cation of a Steam-Boiler with Signal-Coq Micka l Kerb uf1 , David Nowak2 assistant, Coq, for the speci cation and the veri cation of co-inductive properties of the well-known steam cation tools. Keywords: synchronous programming, theorem proving, the steam- boiler problem. 1

  2. Cell body rocking is a dominant mechanism for flagellar synchronization in a swimming algae

    E-Print Network [OSTI]

    Geyer, Veikko; Howard, Jonathon; Friedrich, Benjamin M

    2013-01-01T23:59:59.000Z

    The unicellular green algae Chlamydomonas swims with two flagella, which can synchronize their beat. Synchronized beating is required to swim both fast and straight. A long-standing hypothesis proposes that synchronization of flagella results from hydrodynamic coupling, but the details are not understood. Here, we present realistic hydrodynamic computations and high-speed tracking experiments of swimming cells that show how a perturbation from the synchronized state causes rotational motion of the cell body. This rotation feeds back on the flagellar dynamics via hydrodynamic friction forces and rapidly restores the synchronized state in our theory. We calculate that this `cell body rocking' provides the dominant contribution to synchronization in swimming cells, whereas direct hydrodynamic interactions between the flagella contribute negligibly. We experimentally confirmed the coupling between flagellar beating and cell body rocking predicted by our theory. We propose that the interplay of flagellar beating a...

  3. Impact of retailer's promotional activities on customer traffic

    E-Print Network [OSTI]

    Tasic, Ivan

    2007-09-17T23:59:59.000Z

    and Matutes (1994), Blattberg, Briesch and Fox (1995), Drèze (1999), and DeGraba (2003). Although the assumption of a positive relationship between promotional activity and store traffic keeps re-appearing in many papers, empirical studies tackling... are assumed to be positive, although this is not a proven fact. One has to exercise extreme caution when reading through the literature, and not take anything for granted. A good example of inconsequential work is that of Blattberg, Briesch, and Fox (1995...

  4. On freeway traffic control by a lane closure

    E-Print Network [OSTI]

    Henderson, Donald Manson

    1971-01-01T23:59:59.000Z

    ON PREENAY TRAPPIC CONTROL BY. A LANE CLOSURE A Thesis by DONALD MANSON HENDERSON Submitted to the. Graduate College of Texas A&M University in partial fulfillment of the requirement. for the degree of MASTER OP SCIENCE Ma)or Suh]ect: Civil... Engineering August 1971 ON FREEWAY TRAFFIC CONTROL BY A LANE CLOSURE A Thesis by DONALD MANSON HENDERSON Approved as to style and content by: (Chairman of ommittee) (Head of Departmen (Member) (Member) (Member) ember) (Member) August 1971 ABSTRACT...

  5. Incorporation of Lagrangian measurements in freeway traffic state estimation

    E-Print Network [OSTI]

    , University of California, Berkeley, United States a r t i c l e i n f o Article history: Received 15 May 2009 state estimation GPS-enabled cell-phones Probe data collection a b s t r a c t Cell-phones equipped lose 4.2 billion hours and waste 2.9 billion of fuel gallons per year because of traffic congestion

  6. DUAL USE OF LEDS: SIGNALING AND COMMUNICATIONS IN ITS Grantham Pang, Chi-ho Chan, Hugh Liu, Thomas Kwan

    E-Print Network [OSTI]

    Pang, Grantham

    of light-emitting diodes (LEDs) over incandescent lights is well-supported. This is due to their high shown that the high brightness LEDs are significantly brighter than the incandescent lights lights with LEDs is a reduction in power consumption [7]. In addition, incandescent traffic signals burn

  7. Continuous kinematic wave models of merging traffic flow

    E-Print Network [OSTI]

    Wen-Long Jin

    2010-04-13T23:59:59.000Z

    Merging junctions are important network bottlenecks, and a better understanding of merging traffic dynamics has both theoretical and practical implications. In this paper, we present continuous kinematic wave models of merging traffic flow which are consistent with discrete Cell Transmission Models with various distribution schemes. In particular, we develop a systematic approach to constructing kinematic wave solutions to the Riemann problem of merging traffic flow in supply-demand space. In the new framework, Riemann solutions on a link consist of an interior state and a stationary state, subject to admissible conditions such that there are no positive and negative kinematic waves on the upstream and downstream links respectively. In addition, various distribution schemes in Cell Transmission Models are considered entropy conditions. In the proposed analytical framework, we prove that the stationary states and boundary fluxes exist and are unique for the Riemann problem for both fair and constant distribution schemes. We also discuss two types of invariant merge models, in which local and discrete boundary fluxes are the same as global and continuous ones. With numerical examples, we demonstrate the validity of the analytical solutions of interior states, stationary states, and corresponding kinematic waves. Discussions and future studies are presented in the conclusion section.

  8. A Learning System for Discriminating Variants of Malicious Network Traffic

    SciTech Connect (OSTI)

    Beaver, Justin M [ORNL; Symons, Christopher T [ORNL; Gillen, Rob [ORNL

    2013-01-01T23:59:59.000Z

    Modern computer network defense systems rely primarily on signature-based intrusion detection tools, which generate alerts when patterns that are pre-determined to be malicious are encountered in network data streams. Signatures are created reactively, and only after in-depth manual analysis of a network intrusion. There is little ability for signature-based detectors to identify intrusions that are new or even variants of an existing attack, and little ability to adapt the detectors to the patterns unique to a network environment. Due to these limitations, the need exists for network intrusion detection techniques that can more comprehensively address both known unknown networkbased attacks and can be optimized for the target environment. This work describes a system that leverages machine learning to provide a network intrusion detection capability that analyzes behaviors in channels of communication between individual computers. Using examples of malicious and non-malicious traffic in the target environment, the system can be trained to discriminate between traffic types. The machine learning provides insight that would be difficult for a human to explicitly code as a signature because it evaluates many interdependent metrics simultaneously. With this approach, zero day detection is possible by focusing on similarity to known traffic types rather than mining for specific bit patterns or conditions. This also reduces the burden on organizations to account for all possible attack variant combinations through signatures. The approach is presented along with results from a third-party evaluation of its performance.

  9. The Optimal Power Tracking Control Strategy of Grid-Connected Excited Synchronous Wind Power Generator.

    E-Print Network [OSTI]

    Cheng, Wen-kai

    2014-01-01T23:59:59.000Z

    ??In this thesis, the wind power system is a coaxial coupling structure between servo motor and excited synchronous wind power generator. By using the excited… (more)

  10. E-Print Network 3.0 - axial-gap type synchronous Sample Search...

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

    of Electrical and Computer Engineering, University of Tennessee Collection: Engineering 2 Ad Hoc Synchronization Considered Harmful Weiwei Xiong+, Soyeon Park, Jiaqi Zhang,...

  11. E-Print Network 3.0 - asynchronous inhibition-mediated synchronization...

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

    modification to the current synchronization algorithm... for the asynchronism problem. Section 7 concludes the paper. ... Source: Lai, Ten-Hwang "Steve" - Department of Computer...

  12. Signal processor for processing ultrasonic receiver signals

    DOE Patents [OSTI]

    Fasching, George E. (Morgantown, WV)

    1980-01-01T23:59:59.000Z

    A signal processor is provided which uses an analog integrating circuit in conjunction with a set of digital counters controlled by a precision clock for sampling timing to provide an improved presentation of an ultrasonic transmitter/receiver signal. The signal is sampled relative to the transmitter trigger signal timing at precise times, the selected number of samples are integrated and the integrated samples are transferred and held for recording on a strip chart recorder or converted to digital form for storage. By integrating multiple samples taken at precisely the same time with respect to the trigger for the ultrasonic transmitter, random noise, which is contained in the ultrasonic receiver signal, is reduced relative to the desired useful signal.

  13. Self-Control of Traffic Lights and Vehicle Flows in Urban Road Networks

    E-Print Network [OSTI]

    Lämmer, Stefan

    2008-01-01T23:59:59.000Z

    Based on fluid-dynamic and many-particle (car-following) simulations of traffic flows in (urban) networks, we study the problem of coordinating incompatible traffic flows at intersections. Inspired by the observation of self-organized oscillations of pedestrian flows at bottlenecks [D. Helbing and P. Moln\\'ar, Phys. Eev. E 51 (1995) 4282--4286], we propose a self-organization approach to traffic light control. The problem can be treated as multi-agent problem with interactions between vehicles and traffic lights. Specifically, our approach assumes a priority-based control of traffic lights by the vehicle flows themselves, taking into account short-sighted anticipation of vehicle flows and platoons. The considered local interactions lead to emergent coordination patterns such as ``green waves'' and achieve an efficient, decentralized traffic light control. While the proposed self-control adapts flexibly to local flow conditions and often leads to non-cyclical switching patterns with changing service sequences ...

  14. Determination of ovulation time in the superovulated and synchronized bovine

    E-Print Network [OSTI]

    Maxwell, Duane Paul

    1977-01-01T23:59:59.000Z

    &VTS INTRODUCTION LITERATURE REVIEW Time or Ovulation Superovulation with Pregnant 3Iare Soru&a Gonadot rop in Synchronization with Prosta?lan&lins Superovulation and Synchronizat. i. on Using PMSG and PGFzn I. aparoscopy Nonsurgical Ova Collection Plasma..."). {b) When &. ows with functional corpora lu ea arc superovulated and insea&inated, th&. ova are not fert) li. zed (Cas)da et al. , 1943; Rowson, 195l. ; IVillett et al , 1952) . (cj I xcessivc d&'scs of gonadotropins are counter-n reductive...

  15. On chip clock synchronization for large digital systems

    E-Print Network [OSTI]

    Brueske, Daniel

    1994-01-01T23:59:59.000Z

    . Figure 4. Figure 5. Data Synchronization. Simple Inverter and Dynamic Power Dissipation. Single Wire Clock Network. H ? Tree Clock Distribution Network. Balanced Clock Tree al'ter [8]. Figurc 6. PLL Based Distributed System. Figurc 7. Phase Lock... is distributed to the various elements using such an architecture. This type of network has been successfully used in the Alpha chip [3]. A large buffer is used to drive a single wire laid across the chip. Several of the buffer ? wire are connected in Vin 1...

  16. Synchronization of multimedia streams over packet-switched networks

    E-Print Network [OSTI]

    Brewer, Jason M.

    1995-01-01T23:59:59.000Z

    -TIME MULTIMEDIA NETWORK AP- PLICATIONS A. Compression . 1. Audio Compression 2. Video Compression B. Sources of Variable Delay . 1. Coding Delays 2. Network Jitter 3. Sum Effects of Delays C. QoS and Network Protocols 1. Quality of Service (Qo... header fields 45 21 Temporal distortion caused by delay adjustment during a talkspurt. . 46 22 End-to-end steps for a video frame 48 23 End-to-end steps for an audio segment. 24 Synchronization Algorithm. 51 25 26 27 28 Original end-to-end delay...

  17. Synchronization and Collective Dynamics in a Carpet of Microfluidic Rotors

    E-Print Network [OSTI]

    Nariya Uchida; Ramin Golestanian

    2010-04-28T23:59:59.000Z

    We study synchronization of an array of rotors on a substrate that are coupled by hydrodynamic interaction. The rotors that are modeled by an effective rigid body, are driven by an internal torque and exerts an active force on the surrounding fluid. The long-ranged nature of the hydrodynamic interaction between the rotors causes a rich pattern of dynamical behaviors including phase ordering and turbulent spiral waves. The model provides a novel example of coupled oscillators with long-range interaction. Our results suggest strategies for designing controllable microfluidic mixers using the emergent behavior of hydrodynamically coupled active components.

  18. Walking and Automobile Traffic Near Schools: Data to SUpport An Evaluation Of School Pedestrian Safety Programs

    E-Print Network [OSTI]

    Anderson, Craig L MPH, PhD; Boarnet, Marlon G.; McMillan, Tracy; Alfonzo, Mariela; Day, Kristen

    2002-01-01T23:59:59.000Z

    Anderson Walking And Automobile Traffic Near Schools: Dataof many pedestrian-automobile conflicts both on public roadsthe unique nature of both automobile and walking travel near

  19. Distributed Architecture for Real-time Traffic Analysis Cristian Morariu, Burkhard Stiller

    E-Print Network [OSTI]

    Boyer, Edmond

    Distributed Architecture for Real-time Traffic Analysis Cristian Morariu, Burkhard Stiller Department of Informatics, University of Zürich CH-8050, Zürich, Switzerland {morariu, stiller

  20. The Dynamics of Internet Traffic: Self-Similarity, Self-Organization, and Complex Phenomena

    E-Print Network [OSTI]

    Reginald D. Smith

    2010-09-05T23:59:59.000Z

    The Internet is the most complex system ever created in human history. Therefore, its dynamics and traffic unsurprisingly take on a rich variety of complex dynamics, self-organization, and other phenomena that have been researched for years. This paper is a review of the complex dynamics of Internet traffic. Departing from normal treatises, we will take a view from both the network engineering and physics perspectives showing the strengths and weaknesses as well as insights of both. In addition, many less covered phenomena such as traffic oscillations, large-scale effects of worm traffic, and comparisons of the Internet and biological models will be covered.

  1. Identifying Traffic-Related Air Pollution Hotspots in the Built Environment

    E-Print Network [OSTI]

    Wu, Lisa

    2014-01-01T23:59:59.000Z

    419, 7-15. Health Effects Institute. (2010). Traffic-relatedand health effects. Health Effects Institute, 17. Boston,al. , 2002). The Health Effects Institute (HEI, 2010) report

  2. E-Print Network 3.0 - air route traffic control centers Sample...

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

    routing algorithms for traffic classes that require... mechanisms such as congestion control and scheduling, we develop ... Source: Carnegie Mellon University, School of...

  3. E-Print Network 3.0 - air traffic management Sample Search Results

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

    Page: << < 1 2 3 4 5 > >> 1 Visualization of Air Traffic Flow for Modeling and Control Applications Banavar Sridhar and Kapil Sheth Summary: flexible system with higher...

  4. E-Print Network 3.0 - assessing traffic safety Sample Search...

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

    and prediction of traffic safety at urban intersection and their application in micro... was to assess the ... Source: Hellinga, Bruce - Department of Civil Engineering,...

  5. Geothermal heating enhances atmospheric asymmetries on synchronously rotating planets

    E-Print Network [OSTI]

    Haqq-Misra, Jacob

    2014-01-01T23:59:59.000Z

    Earth-like planets within the liquid water habitable zone of M type stars may evolve into synchronous rotators. On these planets, the sub-stellar hemisphere experiences perpetual daylight while the opposing anti-stellar hemisphere experiences perpetual darkness. Because the night-side hemisphere has no direct source of energy, the air over this side of the planet is prone to freeze out and deposit on the surface, which could result in atmospheric collapse. However, general circulation models (GCMs) have shown that atmospheric dynamics can counteract this problem and provide sufficient energy transport to the anti-stellar side. Here we use an idealized GCM to consider the impact of geothermal heating on the habitability of synchronously rotating planets. Geothermal heating may be expected due to tidal interactions with the host star, and the effects of geothermal heating provide additional habitable surface area and may help to induce melting of ice on the anti-stellar hemisphere. We also explore the persisten...

  6. Spontaneous synchronization driven by energy transport in interconnected networks

    E-Print Network [OSTI]

    Vincenzo Nicosia; Per Sebastian Skardal; Vito Latora; Alex Arenas

    2014-07-22T23:59:59.000Z

    Understanding dynamical processes on networks is an important area of research in complex systems, with far reaching implications and applications in many real-world cases. However, the research to date has mainly focused on single dynamical processes occurring on isolated networks, and very little is known about the more interesting and realistic case of different kinds of intertwined dynamical processes taking place on interconnected networks. An example of the non-trivial combination of two types of dynamics can be found in the human brain, where cerebral circulation delivers the nutrients and oxygenated blood needed for the activity of the different brain areas, and in turn the activity of a region can induce changes in the distribution of blood flow. Here, we introduce and study a model of intertwined dynamics on interconnected networks, inspired by the human brain, which consists of bidirectionally coupled synchronization and energy transport processes. Remarkably, the proposed model allows the emergence of spontaneous switch-like synchronization transitions driven by the energy transport dynamics, which qualitatively mirror the transitions observed in human brain dynamics between resting-state and cognitive activity. We provide a steady-state analytical explanation for the observed behavior and furthermore show that the switch-like transition is robust over a wide range of model parameters and network topologies. We suggest that the complexity inherent in other interconnected dynamical processes might be responsible for various other emergent behaviors observed in natural systems.

  7. The RTMS (Remote Traffic Microwave Sensor) unit is a traffic sensor which uses microwave signals to detect vehicles. Unlike sensors which use the Doppler effect, this sensor

    E-Print Network [OSTI]

    Prevedouros, Panos D.

    counter unit. Additional items for deployment include solar panel, batteries and modem with cellular dimly. The LED is bright only when data is being downloaded from it. Solar Panel The solar panel batteries are used they must be connected in parallel. The solar panel, batteries, and the load all connect

  8. Design of a High Performance Ferrite Magnet-Assisted Synchronous Reluctance Motor for an

    E-Print Network [OSTI]

    Paderborn, Universität

    Design of a High Performance Ferrite Magnet- Assisted Synchronous Reluctance Motor for an Electric) ferrite-based permanent magnet-assisted synchronous reluctance motor has been designed for an electric vehicle application. The design steps are outlined. Ferrite magnets have been chosen over conventional Nd

  9. Dynamic environment coupling induce synchronized states in coupled time-delayed electronic circuits

    E-Print Network [OSTI]

    R. Suresh; K. Srinivasan; D. V. Senthilkumar; K. Murali; M. Lakshmanan; J. Kurths

    2014-01-27T23:59:59.000Z

    We experimentally demonstrate the occurrence of various synchronized states in coupled piece-wise linear time-delayed electronic circuits using dynamic environment coupling where the environment has its own intrinsic dynamics via feedback from the circuits. We carry out these experiments in two different coupling configurations, namely mutual and subsystem coupling configurations. Depending upon the coupling strength and the nature of feedback, we observe a transition from nonsynchronization to complete synchronization via phase synchronization and from nonsynchronization to inverse synchronization via inverse-phase synchronization between the circuits in hyperchaotic regime. Snapshots of the time evolution, phase projection plots and localized sets of the circuits as observed experimentally from the oscilloscope, along with supporting numerical simulations confirm the existence of different synchronized states. Further, the transition to different synchronized states can be verified from the changes in the largest Lyapunov exponents, Correlation of Probability of Recurrence and Correlation Coefficient as a function of the coupling strength. We present a detailed linear stability analysis and obtain conditions for different synchronized states.

  10. High intensity picosecond Fourier limited pulses : design of a synchronously pumped dye laser system

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    527 High intensity picosecond Fourier limited pulses : design of a synchronously pumped dye laser picosecond pulses. A Nd : Yag picosecond laser is used to synchronously pump a dye oscillator/amplifier system. The dye oscillator is of the Littman type. Up to 1.5 mJ of energy is obtained in a 20 ps pulse

  11. Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period

    E-Print Network [OSTI]

    Price, P. Buford

    Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period R (2006), Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period histories from ice coring of Greenland and Antarctica over the period 2 to 45 ka, using SO4 anomalies

  12. Spatially Synchronous Extinction of Species under External Forcing R. E. Amritkar*

    E-Print Network [OSTI]

    Rangarajan, Govindan

    Spatially Synchronous Extinction of Species under External Forcing R. E. Amritkar* Physical a synchronizing term. Absence of the quadratic saturation term can help the species to avoid extinction. DOI: 10 other examples are documented in Ref. [10]. The second important phenomenon is the extinction of species

  13. SYNCHRONIZATION OF PRESENTATION SLIDES AND LECTURE VIDEOS USING BIT RATE SEQUENCES

    E-Print Network [OSTI]

    Girod, Bernd

    SYNCHRONIZATION OF PRESENTATION SLIDES AND LECTURE VIDEOS USING BIT RATE SEQUENCES G. Schroth1 , N The temporal synchronization of presentation slides and lecture videos enables us to enhance the user and reliably detect and recognize slide changes, which is based on bit rate sequences. By exploiting readily

  14. Compositionality in Synchronous Data Flow: Modular Code Generation from Hierarchical SDF Graphs

    E-Print Network [OSTI]

    Compositionality in Synchronous Data Flow: Modular Code Generation from Hierarchical SDF Graphs in Synchronous Data Flow: Modular Code Generation from Hierarchical SDF Graphs Stavros Tripakis, Dai Bui, Bert of California, Berkeley stavros, daib, eal@eecs.berkeley.edu October 20, 2009 Abstract Hierarchical SDF models

  15. Cosimulating Synchronous DSP Applications with Analog RF Circuits Jos Luis Pino and Khalil Kalbasi

    E-Print Network [OSTI]

    , synchronous dataflow (SDF), SPICE and circuit envelope simulation technologies are reviewed. Each. There are several forms of dataflow defined in HP Ptolemy. Synchronous dataflow(SDF), allows the succinct rates in the system are rationally related. SDF is ideally suited to a large set of DSP applications

  16. Synchronization-Free Parallel Collision Detection Pipeline Quentin Avril Valerie Gouranton Bruno Arnaldi

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Synchronization-Free Parallel Collision Detection Pipeline Quentin Avril Val´erie Gouranton Bruno a first parallel and adaptive collision detection pipeline running on a multi-core architecture. This pipeline integrates a first global synchronization-free parallelization of its major steps and enables

  17. SYNCHRONIZATION OF COMBUSTION VARIATIONS IN A MULTI-CYLINDER SPARK IGNITION ENGINE

    E-Print Network [OSTI]

    Tennessee, University of

    SYNCHRONIZATION OF COMBUSTION VARIATIONS IN A MULTI-CYLINDER SPARK IGNITION ENGINE C. Stuart Daw combustion variations in dif- ferent cylinders at fuel-lean conditions in an eight-cylinder spark ignition of synchronization is associated with bifurca- tion instabilities reported previously for combustion in single

  18. A synchronous model of the PLC programming language ST Fernando Jimenez-Fraustro

    E-Print Network [OSTI]

    Boyer, Edmond

    A synchronous model of the PLC programming language ST Fernando Jimenez-Fraustro IRISA / INRIA F of a synchronous model of the PLC programming lan- guage ST. This work is part of the integration of the IEC 1131 Logic Controllers (PLC) architec- tures. Their design relies on standards like the IEC 1131 norm

  19. On the Scalability of Data Synchronization Protocols for PDAs and Mobile Devices

    E-Print Network [OSTI]

    Goldberg, Bennett

    Boston University Abstract Personal Digital Assistants (PDAs) and other mobile computing devices relyOn the Scalability of Data Synchronization Protocols for PDAs and Mobile Devices S. Agarwal D, tetherless networks. Keywords: Personal Digital Assistants, mobile networks, data synchronization A version

  20. Abstract--Linear electrical loading system (LELS) driven by electrical cylinder with permanent magnet synchronous

    E-Print Network [OSTI]

    Yao, Bin

    magnet synchronous motor (PMSM) offers several advantages of high transmission efficiency and high cylinder driven by permanent magnet synchronous motor (PMSM). Though direct-drive linear motors has some to direct-drive linear motor, the solution of electrical cylinder with PMSM has larger output force

  1. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 55, NO. 2, FEBRUARY 2008 501 Permanent Magnet Synchronous Machine

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Terms--Direct control, hybrid dynamic systems, perma- nent magnet synchronous machine (PMSM), physical magnet synchronous machine (PMSM) and a two-level voltage inverter (Fig. 1). The PMSM constitutes variables) so hybrid control strategies apply adequately. For PMSM drives, vector control has been

  2. Synchronous Motor Observability Study and an Improved Zero-speed Position Estimation Design

    E-Print Network [OSTI]

    Boyer, Edmond

    with the Permanent Magnet Synchronous Motor (PMSM) observability analysis for sensor- less control design. Nevertheless, there are no sufficient theoretical observability analyses for the PMSM. In the literature, only here for the surface Permanent Magnet Synchronous Motor (PMSM) to overcome position observability

  3. A comparison of thick film and thin film traffic stripes

    E-Print Network [OSTI]

    Keese, Charles J

    1952-01-01T23:59:59.000Z

    Striys. . . Pigmented Bitusmn Stripes . Asphalt %uilt-Upa Striye vith Pigmented Portland Cement Mortar Cover Course 38 . ~ 41 Thin Film Stripes Used for Comparison Results of Comparing Thick Film Stripes and Thin Film Paint Stripes . ~ ~ ~ ~ ~ 43... was aspbaltio oonorets. The pavement in Test Areas 2y 3p and 4 vas portland cesmnh ooncrete, Two test areas (3 and 4) vere located in such manner as to provide uninterrupted flow of traffic over tbs entire length of the test area. The other two test areas (1...

  4. EECBG Success Story: Getting Traffic Lights Talking to Improve Topeka's

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat Pump Models |Conduct,Final9: DraftPlant,Community' |DepartmentMoney |BigTraffic

  5. Acquisition and registration of aerial video imagery of urban traffic

    SciTech Connect (OSTI)

    Loveland, Rohan C [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    The amount of information available about urban traffic from aerial video imagery is extremely high. Here we discuss the collection of such video imagery from a helicopter platform with a low-cost sensor, and the post-processing used to correct radial distortion in the data and register it. The radial distortion correction is accomplished using a Harris model. The registration is implemented in a two-step process, using a globally applied polyprojective correction model followed by a fine scale local displacement field adjustment. The resulting cleaned-up data is sufficiently well-registered to allow subsequent straight-forward vehicle tracking.

  6. Synchronized states in chaotic systems coupled indirectly through a dynamic environment

    E-Print Network [OSTI]

    V. Resmi; G. Ambika; R. E. Amritkar

    2010-05-04T23:59:59.000Z

    We consider synchronization of chaotic systems coupled indirectly through a common environmnet where the environment has an intrinsic dynmics of its own modulated via feedback from the systems. We find that a rich vareity of synchronization behavior, such as in-phase, anti-phase,complete and anti- synchronization is possible. We present an approximate stability analysis for the different synchronization behaviors. The transitions to different states of synchronous behaviour are analyzed in the parameter plane of coupling strengths by numerical studies for specific cases such as Rossler and Lorenz systems and are characterized using various indices such as correlation, average phase difference and Lyapunov exponents. The threshold condition obtained from numerical analysis is found to agree with that from the stability analysis.

  7. Elastic ice shells of synchronous moons: Implications for cracks on Europa and non-synchronous rotation of Titan

    E-Print Network [OSTI]

    Goldreich, Peter M

    2009-01-01T23:59:59.000Z

    A number of synchronous moons are thought to harbor water oceans beneath their outer ice shells. A subsurface ocean frictionally decouples the shell from the interior. This decoupling has led to proposals that a weak tidal or atmospheric torque might cause the shell to rotate differentially with respect to the synchronously rotating interior. Applications along these lines have been made to Europa and Titan. As a result of centrifugal and tidal forces, the oceans of Europa and Titan have ellipsoidal figures whose long axes point toward the parent planet. Any rotation of the shell away from its equilibrium position induces strains thereby increasing its elastic energy. Thus the shell is coupled to the ocean by an elastic torque. Regarding Europa, it is shown that the tidal torque is far too weak to produce stresses that could fracture the ice shell, thus refuting an idea that has been widely advocated. An alternative formation mechanism for large cracks is proposed. Two years of Cassini RADAR observations of T...

  8. Bigazzi, Figliozzi, and Clifton 1 Motorists' Exposure to Traffic-Related Air Pollution:1

    E-Print Network [OSTI]

    Bertini, Robert L.

    Bigazzi, Figliozzi, and Clifton 1 1 Motorists' Exposure to Traffic-Related Air Pollution:1 Modeling to traffic-related pollution. Large peak-period trip exposures are5 primarily the result of increased pollutants (3), which progressively degrade urban20 air quality (4). Because of coincident vehicle and human

  9. Ascertaining Viability of WiFi based Vehicle-to-Vehicle Network for Traffic Information

    E-Print Network [OSTI]

    Chen, Yuanzhu Peter

    Ascertaining Viability of WiFi based Vehicle-to-Vehicle Network for Traffic InformationDepartment of Computer Science 2Department of Civil Engineering Rutgers University, USA Rutgers University- Traffic). However, these solutions are plagued by prohibitive deployment and maintenance cost

  10. EXPERIMENTAL VERIFICATION OF TIME-DEPENDENT ACCUMULATION PREDICTIONS IN CONGESTED TRAFFIC

    E-Print Network [OSTI]

    Smilowitz, Karen

    with a streamlined version of the kinematic wave theory that does not rely on ambiguous traffic stream, it is fair to ask whether these complexities prevent a theory of waves (such as the kinematic wave (KW traffic at random but predictable speeds, i.e., as waves (see e.g. [1-5]), plots of flow-density data have

  11. Riemann Solver for a Kinematic Wave Traffic Model with Discontinuous Flux$

    E-Print Network [OSTI]

    Stockie, John

    Riemann Solver for a Kinematic Wave Traffic Model with Discontinuous Flux$ Jeffrey K. Wiensa class of kinematic wave15 traffic models that couple the conservation law Eq. (1) with a variety as 0. For certain initial data, the Riemann problem can give rise to zero waves that propagate

  12. TRACKING ELEPHANT FLOWS IN INTERNET BACKBONE TRAFFIC WITH AN FPGA-BASED CACHE

    E-Print Network [OSTI]

    Haddadi, Hamed

    TRACKING ELEPHANT FLOWS IN INTERNET BACKBONE TRAFFIC WITH AN FPGA-BASED CACHE Martin Zadnik an FPGA-friendly approach to track- ing elephant flows in network traffic. Our approach, Single Step elephant flows: con- servatively promoting potential elephants and evicting low- rate flows in LRU manner

  13. Sources of Traffic Demand Variability and Use of Monte Carlo for Network Capacity Planning

    E-Print Network [OSTI]

    Cortes, Corinna

    to deal with rightfully angry business and finance teams: physical resources start depreciating the moment the sources of traffic demand variability and dive into Monte-Carlo methodology as an efficient way; throughput; traffic; concurrency; availability; node-and-link model; fast-time simulation; agent

  14. Highway Traffic Noise Analysis and Abatement Guidelines The purpose of this project is to

    E-Print Network [OSTI]

    Prevedouros, Panos D.

    Highway Traffic Noise Analysis and Abatement Guidelines The purpose of this project is to: (1 AND ABATEMENT GUIDELINE. HDOT's 1997 noise policy has to be reviewed and updated in order to allow for relief or Federal-Aid highway projects to construct traffic noise abatement measures on existing highways

  15. Roadmap: Aeronautics-Air Traffic Control -Bachelor of Science [AT-BS-AERN-ATC

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Aeronautics- Air Traffic Control - Bachelor of Science [AT-BS-AERN-ATC] College of Applied This roadmap is a recommended semester-by-semester plan of study for this major. However, courses #12;Roadmap: Aeronautics- Air Traffic Control - Bachelor of Science [AT-BS-AERN-ATC] College

  16. From Jammer to Gambler: Modeling and Detection of Jamming Attacks against Time-Critical Traffic

    E-Print Network [OSTI]

    Wang, Wenye

    From Jammer to Gambler: Modeling and Detection of Jamming Attacks against Time-Critical Traffic attacks. However, existing methods to characterize and detect jamming attacks cannot be applied directly. In this paper, we aim at modeling and detecting jamming attacks against time-critical traffic. We introduce

  17. MaxMAC: a Maximally Traffic-Adaptive MAC Protocol for Wireless Sensor Networks

    E-Print Network [OSTI]

    Braun, Torsten

    consumption, researchers have proposed Energy-Efficient Medium Access (E2 -MAC) protocols that switch- traffic phases, while still exhibiting a high energy-efficiency in periods of sparse traffic. The paper-based scenarios require reasonable quality of service during periods of increased activity, and a high energy-efficiency

  18. LRRB Pavement Management SystemsTraffic Generator Managing Interaction Between Local

    E-Print Network [OSTI]

    Minnesota, University of

    % of their energy from renewable sources by 2025. #12;LRRB Pavement Management SystemsTraffic Generator MN Wind Resource #12;LRRB Pavement Management SystemsTraffic Generator Wind Power (continued) · Advantage: · Energy Anderson, Stearns County Deb Bloom, City of Roseville Bruce Hasbargen, Lk of Woods Cty Steve Koehler, City

  19. Scheduling Automated Traffic on a Network of Arvind Giridhar and P.R. Kumar

    E-Print Network [OSTI]

    vehicles which are au- tomatically driven along smart highways and/or city roads [2], [3]. Such automation consider the problem of scheduling automated traffic in a city. Such automatic scheduling can improve algorithm and evaluate its performance through simulations. Index Terms: Traffic scheduling, smart vehicles

  20. Low-Latency ECDSA Signature Verification A Road Towards Safer Traffic

    E-Print Network [OSTI]

    crippling efficient movement inside and towards cities resulting in mounting travel times, fuel consumption running on high end CPUs and FPGAs. These implementations are far from cost-effective nor energy efficient caused by the rising traffic densities on our roads and in our cities. Traffic congestion is increasingly

  1. February 17, 2005 Traffic: See current conditions on all Valley freeways

    E-Print Network [OSTI]

    McGraw, Kevin J.

    ° Flagstaff 34° |Traffic Weather Site search| | | | | |Front Page Valley & State Sports Business Arizona Wheels Yes Ahwatukee Chandler Gilbert Glendale/Peoria Mesa Phoenix Scottsdale Southwest Valley Sun CitiesFebruary 17, 2005 Traffic: See current conditions on all Valley freeways PHOENIX 56° Tucson 53

  2. Bellini: Ferrying Application Traffic Flows through Geo-distributed Datacenters in the Cloud

    E-Print Network [OSTI]

    Li, Baochun

    Bellini: Ferrying Application Traffic Flows through Geo-distributed Datacenters in the Cloud Zimu. To take full advantage of superior connectivities between geo-distributed datacenters, application traffic, implementing and deploying such inter- datacenter protocols for various applications, such as messaging

  3. Postcard: Minimizing Costs on Inter-Datacenter Traffic with Store-and-Forward

    E-Print Network [OSTI]

    Li, Baochun

    Postcard: Minimizing Costs on Inter-Datacenter Traffic with Store-and-Forward Yuan Feng, Baochun Li--It is typical for cloud providers to operate a number of geographically distributed datacenters, where inter-datacenter such inter-datacenter traffic incurs substantial operational costs that are charged by ISPs, it varies

  4. The dynamic classification and identification of network applications responsible for network traffic

    E-Print Network [OSTI]

    Zander, Sebastian

    -taps based on statistical summaries of traffic details) Intrusion detection (detect suspicious activities Dynamic access control (adaptive firewalls that can detect forbidden applications, Denial of Service (Do for network traffic flows offers substantial benefits to a number of key areas in IP network engineering

  5. A Machine Learning Approach for Efficient Traffic Classification Wei Li and Andrew W. Moore

    E-Print Network [OSTI]

    Hand, Steven

    . It serves as the input for practical solutions such as network monitoring, quality- of-service and intrusion-detection efficient monitoring, auditing and intelligent control over the traffic, but the success of the Internet has of encapsulated or encrypted traffic is increasing. Examples include proxies, VPN, tunneling, and applications

  6. On the Necessity of Traffic Shaping for PMU Measurement Data Streams

    E-Print Network [OSTI]

    Candea, George

    1 On the Necessity of Traffic Shaping for PMU Measurement Data Streams Miroslav Popovic, Peng Gao a PMU data transfer layer. Implementing traffic shaping within PMUs is essential for avoiding excessive distribution network. It needs to ensure the delivery of PMU data within stringent time delays and with minimal

  7. A non-continuum approach to obtain a macroscopic model for the flow of traffic

    E-Print Network [OSTI]

    Tyagi, Vipin

    2007-09-17T23:59:59.000Z

    by continuum models for the flow of traffic. The number of vehicles in a typical section of a freeway does not justify traffic being treated as a continuum. It is also important to recognize that the basic premises of kinetic theory are not appropriate...

  8. Fr\\'echet means of curves for signal averaging and application to ECG data analysis

    E-Print Network [OSTI]

    Bigot, Jérémie

    2011-01-01T23:59:59.000Z

    Signal averaging is the process that consists in computing a mean shape from a set of noisy signals. In the presence of geometric variability in time in the data, the usual Euclidean mean of the raw data yields a mean pattern that does not reflect the typical shape of the observed signals. In this setting, it is necessary to use alignment techniques for a precise synchronization of the signals, and then to average the aligned data to obtain a consistent mean shape. In this paper, we study the numerical performances of Fr\\'echet means of curves which are extensions of the usual Euclidean mean to spaces endowed with non-Euclidean metrics. This yields a new algorithm for signal averaging without a reference template. We apply this approach to the estimation of a mean heart cycle from ECG records.

  9. An Expectation-Maximization Method for Calibrating Synchronous Machine Models

    SciTech Connect (OSTI)

    Meng, Da; Zhou, Ning; Lu, Shuai; Lin, Guang

    2013-07-21T23:59:59.000Z

    The accuracy of a power system dynamic model is essential to its secure and efficient operation. Lower confidence in model accuracy usually leads to conservative operation and lowers asset usage. To improve model accuracy, this paper proposes an expectation-maximization (EM) method to calibrate the synchronous machine model using phasor measurement unit (PMU) data. First, an extended Kalman filter (EKF) is applied to estimate the dynamic states using measurement data. Then, the parameters are calculated based on the estimated states using maximum likelihood estimation (MLE) method. The EM method iterates over the preceding two steps to improve estimation accuracy. The proposed EM method’s performance is evaluated using a single-machine infinite bus system and compared with a method where both state and parameters are estimated using an EKF method. Sensitivity studies of the parameter calibration using EM method are also presented to show the robustness of the proposed method for different levels of measurement noise and initial parameter uncertainty.

  10. Synchronization in hyperchaotic time-delayed electronic oscillators coupled indirectly via a common environment

    E-Print Network [OSTI]

    Tanmoy Banerjee; Debabrata Biswas

    2013-03-21T23:59:59.000Z

    The present paper explores the synchronization scenario of hyperchaotic time-delayed electronic oscillators coupled indirectly via a common environment. We show that depending upon the coupling parameters a hyperchaotic time-delayed system can show in-phase or complete synchronization, and also inverse-phase or anti-synchronization. This paper reports the first experimental confirmation of synchronization of hyperchaos in time-delayed electronic oscillators coupled indirectly through a common environment. We confirm the occurrence of in-phase and inverse-phase synchronization phenomena in the coupled system through the dynamical measures like generalized autocorrelation function, correlation of probability of recurrence, and the concept of localized sets computed directly from the experimental time-series data. We also present a linear stability analysis of the coupled system. The experimental and analytical results are further supported by the detailed numerical analysis of the coupled system. Apart from the above mentioned measures, we numerically compute another quantitative measure, namely, Lyapunov exponent spectrum of the coupled system that confirms the transition from the in-phase (inverse-phase) synchronized state to the complete (anti-) synchronized state with the increasing coupling strength.

  11. SITE-CONTROLLED SECURE MULTI-HOMING AND TRAFFIC ENGINEERING FOR IP Randall Atkinson Saleem Bhatti Steve Hailes

    E-Print Network [OSTI]

    Bhatti, Saleem N.

    SITE-CONTROLLED SECURE MULTI-HOMING AND TRAFFIC ENGINEERING FOR IP Randall Atkinson Saleem Bhatti Grid, including the global Internet. Similarly, the ability to provide traffic engineering for a site. Current approaches to site multi-homing and site traffic engineering (a) re- quire assistance from

  12. GT: picking up the truth from the ground for Internet traffic F. Gringoli, L. Salgarelli, M. Dusi

    E-Print Network [OSTI]

    California at San Diego, University of

    of Internet traffic modeling, firewall, and intrusion detection research requires traces where some ground. But DPI is ineffective when traffic is encrypted and ambiguous when different protocols exhibit similarGT: picking up the truth from the ground for Internet traffic F. Gringoli, L. Salgarelli, M. Dusi

  13. Generation-based memory synchronization in a multiprocessor system with weakly consistent memory accesses

    DOE Patents [OSTI]

    Ohmacht, Martin

    2014-09-09T23:59:59.000Z

    In a multiprocessor system, a central memory synchronization module coordinates memory synchronization requests responsive to memory access requests in flight, a generation counter, and a reclaim pointer. The central module communicates via point-to-point communication. The module includes a global OR reduce tree for each memory access requesting device, for detecting memory access requests in flight. An interface unit is implemented associated with each processor requesting synchronization. The interface unit includes multiple generation completion detectors. The generation count and reclaim pointer do not pass one another.

  14. An Efficient Control of a Series Connected Two-Synchronous Motor 5-Phase with Non Sinusoidal EMF Supplied by a Single 5-leg VSI: Experimental and

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Synchronous Machines (PMSM) connected in series. Even if the Electro-Motive Force (EMF) are trapezoidal

  15. Parameter Analysis of the VPIN (Volume synchronized Probability of Informed Trading) Metric

    SciTech Connect (OSTI)

    Song, Jung Heon; Wu, Kesheng; Simon, Horst D.

    2014-03-01T23:59:59.000Z

    VPIN (Volume synchronized Probability of Informed trading) is a leading indicator of liquidity-induced volatility. It is best known for having produced a signal more than hours before the Flash Crash of 2010. On that day, the market saw the biggest one-day point decline in the Dow Jones Industrial Average, which culminated to the market value of $1 trillion disappearing, but only to recover those losses twenty minutes later (Lauricella 2010). The computation of VPIN requires the user to set up a handful of free parameters. The values of these parameters significantly affect the effectiveness of VPIN as measured by the false positive rate (FPR). An earlier publication reported that a brute-force search of simple parameter combinations yielded a number of parameter combinations with FPR of 7percent. This work is a systematic attempt to find an optimal parameter set using an optimization package, NOMAD (Nonlinear Optimization by Mesh Adaptive Direct Search) by Audet, le digabel, and tribes (2009) and le digabel (2011). We have implemented a number of techniques to reduce the computation time with NOMAD. Tests show that we can reduce the FPR to only 2percent. To better understand the parameter choices, we have conducted a series of sensitivity analysis via uncertainty quantification on the parameter spaces using UQTK (Uncertainty Quantification Toolkit). Results have shown dominance of 2 parameters in the computation of FPR. Using the outputs from NOMAD optimization and sensitivity analysis, We recommend A range of values for each of the free parameters that perform well on a large set of futures trading records.

  16. Empirical Features of Spontaneous and Induced Traffic Breakdowns in Free Flow at Highway Bottlenecks

    E-Print Network [OSTI]

    Kerner, Boris S; Klenov, Sergey L; Rehborn, Hubert; Leibel, Michael

    2015-01-01T23:59:59.000Z

    Based on an empirical study of real field traffic data measured in 1996--2014 through road detectors installed on German freeways, we reveal physical features of empirical nuclei for spontaneous traffic breakdown in free flow at highway bottlenecks. It is shown that the source of a nucleus for traffic breakdown is the solely difference between empirical spontaneous and induced traffic breakdowns at a highway bottleneck. Microscopic traffic simulations with a stochastic traffic flow model in the framework of three-phase theory explain the empirical findings. It turns out that in the most cases, a nucleus for empirical spontaneous traffic breakdown occurs through an interaction of one of waves in free flow with an empirical permanent speed disturbance localized at a highway bottleneck. The wave is a localized structure in free flow, in which the total flow rate is larger and the speed averaged across the highway is smaller than outside the wave. The waves in free flow appear due to oscilations in the percentage...

  17. Optimal Methodology for Synchronized Scheduling of Parallel Station Assembly with Air Transportation

    E-Print Network [OSTI]

    Ganesan, Viswanath Kumar

    We present an optimal methodology for synchronized scheduling of production assembly with air transportation to achieve accurate delivery with minimized cost in consumer electronics supply chain (CESC). This problem was ...

  18. Recording speech articulation in dialogue: Evaluating a synchronized double electromagnetic articulography setup

    E-Print Network [OSTI]

    Edinburgh, University of

    is the severity of electromagnetic interference between the two machines. Our results suggest that the synchronization method used yields an accuracy of approximately 1 ms. Electromagnetic interference was derived

  19. PHYSICAL REVIEW E 84, 016213 (2011) Isochronal chaos synchronization of delay-coupled optoelectronic oscillators

    E-Print Network [OSTI]

    Illing, Lucas

    -coupled optoelectronic oscillators Lucas Illing,* Cristian D. Panda, and Lauren Shareshian Department of Physics, Reed; published 19 July 2011) We study experimentally chaos synchronization of nonlinear optoelectronic true for optical and optoelectronic devices that operate at technologically relevant radio frequen

  20. Integrating the Army Geospatial Enterprise : synchronizing geospatial-intelligence to the dismounted soldier

    E-Print Network [OSTI]

    Richards, James E., S.M. Massachusetts Institute of Technology

    2010-01-01T23:59:59.000Z

    The Army's Geospatial Enterprise (AGE) has an emerging identity and value proposition arising from the need to synchronize geospatial information activities across the Army in order to deliver value to military decision ...

  1. Autonomous rigid body attitude synchronization Alain Sarlette, Rodolphe Sepulchre and Naomi Ehrich Leonard

    E-Print Network [OSTI]

    Leonard, Naomi

    Leonard Abstract-- This paper studies some extensions to the de- centralized attitude synchronization. alain.sarlette@ulg.ac.be, r.sepulchre@ulg.ac.be N.E. Leonard is with the MAE Department, Princeton

  2. Synchronization transitions in ensembles of noisy oscillators with bi-harmonic coupling

    E-Print Network [OSTI]

    Vladimir Vlasov; Maxim Komarov; Arkady Pikovsky

    2014-11-12T23:59:59.000Z

    We describe synchronization transitions in an ensemble of globally coupled phase oscillators with a bi-harmonic coupling function, and two sources of disorder - diversity of intrinsic oscillatory frequencies and external independent noise. Based on the self-consistent formulation, we derive analytic solutions for different synchronous states. We report on various non-trivial transitions from incoherence to synchrony where possible scenarios include: simple supercritical transition (similar to classical Kuramoto model), subcritical transition with large area of bistability of incoherent and synchronous solutions, and also appearance of symmetric two-cluster solution which can coexist with regular synchronous state. Remarkably, we show that the interplay between relatively small white noise and finite-size fluctuations can lead to metastable asynchronous solution.

  3. Optical phase dynamics in mutually coupled diode laser systems exhibiting power synchronization

    E-Print Network [OSTI]

    Vishwa Pal; Awadhesh Prasad; R Ghosh

    2011-11-10T23:59:59.000Z

    We probe the physical mechanism behind the known phenomenon of power synchronization of two diode lasers that are mutually coupled via their delayed optical fields. In a diode laser, the amplitude and the phase of the optical field are coupled by the so-called linewidth enhancement factor, $\\alpha$. In this work, we explore the role of optical phases of the electric fields in amplitude (and hence power) synchronization through $\\alpha$ in such mutually delay-coupled diode laser systems. Our numerical results show that the synchronization of optical phases drives the powers of lasers to synchronized death regimes. We also find that as $\\alpha$ varies for different diode lasers, the system goes through a sequence of in-phase amplitude-death states. Within the windows between successive amplitude-death regions, the cross-correlation between the field amplitudes exhibits a universal power-law behaviour with respect to $\\alpha$.

  4. Modelling and design of an eddy current coupling for slip-synchronous permanent magnet wind generators.

    E-Print Network [OSTI]

    Mouton, Zac

    2013-01-01T23:59:59.000Z

    ??ENGLISH ABSTRACT: Slip-synchronous permanent magnet generators (SS-PMG) is a recently proposed direct-grid connected direct-drive generator topology for wind power applications. It combines a permanent magnet… (more)

  5. A New, Iterative, Synchronous-Response Algorithm for Analyzing the Morton Effect

    E-Print Network [OSTI]

    Saha, Rohit

    2012-02-14T23:59:59.000Z

    analyzes the Morton Effect as a synchronous response problem with excitations from: (1) mechanical imbalance, (2) induced thermal bent shaft moments, and (3) mechanical imbalance that is induced by thermal bow. A general elliptical orbit can be decomposed...

  6. Methods, systems and apparatus for synchronous current regulation of a five-phase machine

    DOE Patents [OSTI]

    Gallegos-Lopez, Gabriel; Perisic, Milun

    2012-10-09T23:59:59.000Z

    Methods, systems and apparatus are provided for controlling operation of and regulating current provided to a five-phase machine when one or more phases has experienced a fault or has failed. In one implementation, the disclosed embodiments can be used to synchronously regulate current in a vector controlled motor drive system that includes a five-phase AC machine, a five-phase inverter module coupled to the five-phase AC machine, and a synchronous current regulator.

  7. The effect of cisclomiphene on lambing rate and synchronization in sheep

    E-Print Network [OSTI]

    Beaver, Larry Jeff

    1972-01-01T23:59:59.000Z

    THE EFFECT OF CISCLOMIPHENE ON LAMBING RATE AND SYNCHRONIZATION IN SHEEP A Thesis by LARRY JEFF BEAVER Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... December 1972 Major Subject: Physiology of Reproduction THE EFFECT OF CISCLOMIPHENE ON LAMBING RATE AND SYNCHRONIZATION IN SHEEP A Thesis by LARRY JEFF BEAVER Approved as to style and content by: C azrman o Commrttee (Head of Department @C~g Me...

  8. Automated transmission line fault analysis using synchronized sampling at two ends

    SciTech Connect (OSTI)

    Kezunovic, M. [Texas A and M Univ., College Station, TX (United States)] [Texas A and M Univ., College Station, TX (United States); Perunicic, B. [Lamar Univ., Beaumont, TX (United States)] [Lamar Univ., Beaumont, TX (United States)

    1996-02-01T23:59:59.000Z

    This paper introduces a new approach to fault analysis using synchronized sampling. A digital fault recorder with Global Positioning System (GPS) satellite receiver is the source of data for this approach. Fault analysis functions, such as fault detection, classification and location are implemented for a transmission line using synchronized samples from two ends of a line. This technique can be extremely fast, selective and accurate, providing fault analysis performance that can not easily be matched by other known techniques.

  9. Automated transmission line fault analysis using synchronized sampling at two ends

    SciTech Connect (OSTI)

    Kezunovic, M. [Texas A and M Univ., College Station, TX (United States); Perunicic, B. [Lamar Univ., Beaumont, TX (United States)

    1995-12-31T23:59:59.000Z

    This paper introduces a new approach to fault analysis using synchronized sampling. A digital fault recorder with Global Positioning System (GPS) satellite receiver is the source of data for this approach. Fault analysis functions, such as fault detection, classification and location are implemented for a transmission line using synchronized samples from two ends of a line. This technique can be extremely fast, selective and accurate, providing fault analysis performance that can not easily be matched by other known techniques.

  10. For decades, traffic safety improvements have relied primarily upon engineering and enforcement solutions. If we are limited to those options, further

    E-Print Network [OSTI]

    Traffic Safety Culture For decades, traffic safety improvements have relied primarily upon about driving ­ changing our traffic safety culture. A survey by the Center for Transportation Safety on the roads than drivers nationwide, as measured in the 2010 Traffic Safety Culture Index published by the AAA

  11. Air Traffic Control and Alert Agent Henry Hexmoor and Tim Heng

    E-Print Network [OSTI]

    Hexmoor, Henry

    Air Traffic Control and Alert Agent Henry Hexmoor and Tim Heng University of North Dakota Grand Forks, North Dakota, USA {hexmoor,heng}@cs.und.edu ABSTRACT This paper presents an agent program

  12. Childhood Cancer and Traffic-Related Air Pollution Exposure in Pregnancy and Early Life

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    exposure to traffic and nitrogen dioxide. Epidemiology 16(in Taiwan using nitrogen dioxide as an air pollutant marker.benzene and modeled nitrogen dioxide (NO 2 ) as a marker of

  13. Optimal Vehicle Routing with Real-Time Traffic Information Seongmoon Kim1

    E-Print Network [OSTI]

    Lewis, Mark E.

    to accidents, bad weather, traffic con- gestion, etc., trucks hauling time-sensitive freight build "buffer time cost. Indeed a truck parked at the origin is less expensive than one that is in use. Moreover

  14. E-Print Network 3.0 - adaptive traffic flow Sample Search Results

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

    Report ISRN: SICS-T-200213-SE T2002:13 ISSN: 1100-3154 Summary: and Stability of Elephant flows in IP Traffic by Cecilia Borg August 2002 cilla@sics.se Swedish Institute... to...

  15. Real-time analysis of aggregate network traffic for anomaly detection

    E-Print Network [OSTI]

    Kim, Seong Soo

    2005-08-29T23:59:59.000Z

    The frequent and large-scale network attacks have led to an increased need for developing techniques for analyzing network traffic. If efficient analysis tools were available, it could become possible to detect the attacks, anomalies...

  16. Kernel Level Energy-Efficient 3G Background Traffic Shaper for Android Smartphones

    E-Print Network [OSTI]

    Kernel Level Energy-Efficient 3G Background Traffic Shaper for Android Smartphones Ekhiotz Jon energy-efficient, the lack of energy aware- ness on the software front is becoming all too apparent

  17. Automation cueing modulates cerebral blood flow and vigilance in a simulated air traffic control task

    E-Print Network [OSTI]

    Parasuraman, Raja

    Automation cueing modulates cerebral blood flow and vigilance in a simulated air traffic control: Automation; vigilance; cerebral blood flow; mental workload; attentional resources. Automation cueing operator, depending on automation reliability. To assess these effects, transcranial Doppler sonography

  18. Analysis of seasonal and day-of-week traffic patterns at national parks

    E-Print Network [OSTI]

    Liggett, Lindsay Elizabeth

    2009-05-15T23:59:59.000Z

    The National Park Service (NPS) is currently contemplating the implementation of a system-wide traffic monitoring program. While several of the national parks within this network collect continuous vehicle data at multiple stations within each park...

  19. Assessment of durability performance of "Early-Opening-to-Traffic" Portland Cement Concrete pavement and patches

    E-Print Network [OSTI]

    Shrestha, Pradhumna Babu

    1999-01-01T23:59:59.000Z

    This study relates the assessment of durability to ''early-opening-to-traffic'' (EOT) portland cement concrete (PCC). Several factors were identified relative to the performance of EOT PCC. Each of these factors was considered in terms of freeze...

  20. Assessment of older driver understanding of certain traffic control devices in Texas

    E-Print Network [OSTI]

    Hulett, Stephanie Renee

    2000-01-01T23:59:59.000Z

    The purpose of this research was to assess older Texas drivers on their understanding of nine traffic control devices and identify the devices that are misunderstood by people 65 years and older. Additionally, older driver education programs were...

  1. An alternative to constant rate link padding for the prevention of traffic analysis

    E-Print Network [OSTI]

    Graham, Bryan Wayne

    2002-01-01T23:59:59.000Z

    As encryption becomes more prevalent across the internet, techniques that can give an attacker information without needing to overcome encryption will become more important. One such technique, traffic analysis, is already a well researched field...

  2. Evolution of domestic traffic and fares at the top 200 US airports between 1990 and 2008

    E-Print Network [OSTI]

    Ben Abda, Mehdi

    2010-01-01T23:59:59.000Z

    The main objective of this thesis is to analyze the evolution of domestic Origin- Destination (O-D) traffic and fares at the Top 200 airports in the United States between 1990 and 2008. The impetus behind this research is ...

  3. Driving segments analysis for energy and environmental impacts of worsening traffic

    E-Print Network [OSTI]

    Feng, Wen, Ph. D. Massachusetts Institute of Technology

    2007-01-01T23:59:59.000Z

    During the last two decades, traffic congestion in the U.S. has increased from 30% to 67% of peak period travel. Further, current research shows that measures taken within transportation systems, such as adding capacity, ...

  4. E-Print Network 3.0 - air traffic control facilities Sample Search...

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

    Powered by Explorit Topic List Advanced Search Sample search results for: air traffic control facilities Page: << < 1 2 3 4 5 > >> 1 Table of Contents 1 Introduction Summary: to...

  5. Assessing the Potential of Using Traffic Simulation Model Results for Evaluating Automatic Incident Detection Algorithms

    E-Print Network [OSTI]

    Hellinga, Bruce

    Assessing the Potential of Using Traffic Simulation Model Results for Evaluating Automatic Incident of such a test-bed would be the ability to incorporate synthetic data produced by a simulation model since

  6. BICYCLE SAFETY--WHAT YOU NEED TO KNOW Obey all traffic laws while riding your bike.

    E-Print Network [OSTI]

    Straight, Aaron

    942012 BICYCLE SAFETY--WHAT YOU NEED TO KNOW · Obey all traffic laws while riding your bike. · According the California Vehicle Code, every person riding a bicycle upon a street or highway has all

  7. An investigative study of automobile traffic accidents utilizing biorhythm theory for predictive value

    E-Print Network [OSTI]

    Egly, Oscar Henry

    1977-01-01T23:59:59.000Z

    AN INVESTIGATIVE STUDY OF AUTOMOBILE TRAFFIC ACCT. DENTS UTILIZING BIORHYTHM THEORY FOR PREDICTIVE VALUE A Thesis by OSCAR HENRY EGLY JR. Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE May 1977 Major Subject: Industrial Engineering AN INVESTIGATIVE STUDY OF AUTOMOBILE TRAFFIC ACCIDENTS UTILIZING BIORHYTHM THEORY FOR PREDICTIVE VALUE A Thesis by OSCAR HENRY EGLY JR. Approved as to style and content...

  8. A continuous traffic study - estimation of population parameters and the variance of the estimated parameters

    E-Print Network [OSTI]

    Dresser, George Brayton

    1969-01-01T23:59:59.000Z

    are pre- ;ected. The operating ratio is defined and its use for regulatory pur- poses discussed. Procedures for the estimation of operating ratios from CTS and cost data are explained. An approximate formula for the variance of the ratio of two random... 31 TEXAS INTRASTATE TRAFFIC 1967 (Operating Ratio by Actual Weight of Shipment). . 32 TEXAS INTRASTATE TRAFFIC 1967 (Operating Ratio by Number Miles Shipm nt Moved) 33 CHAPTER I STATEMENT QF THE PRGBLEM 1. 1 Introduction The Southwestern...

  9. An analysis to determine correlations of freeway traffic accidents with specific geometric design features

    E-Print Network [OSTI]

    Smith, Frank Miller

    1960-01-01T23:59:59.000Z

    AN ANALYSIS TO DETERMINE CORRELATIONS OF FREEWAY TRAFFIC ACCIDENTS WITH SPECIFIC GEOMETRIC DESIGN FEATURES A Thesis By Frank Miller Smith, Jr. Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE August, 1960 Major Subject: Civil Engineering AN ANALYSIS TO DETERMINE CORRELATIONS OF FREEWAY TRAFFIC ACCIDENTS WITH 'SPECIFIC GEOMETRIC DESIGN FEATURES A Thesis By Frank Miller...

  10. Liquidity facilities and signaling

    E-Print Network [OSTI]

    Arregui, Nicolás

    2010-01-01T23:59:59.000Z

    This dissertation studies the role of signaling concerns in discouraging access to liquidity facilities like the IMF contingent credit lines (CCL) and the Discount Window (DW). In Chapter 1, I analyze the introduction of ...

  11. Enhanced synchronization in an array of spin torque nano oscillators in the presence of oscillating external magnetic field

    E-Print Network [OSTI]

    B. Subash; V. K. Chandrasekar; M. Lakshmanan

    2014-12-23T23:59:59.000Z

    We demonstrate that the synchronization of an array of electrically coupled spin torque nano-oscillators (STNO) modelled by Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equation can be enhanced appreciably in the presence of a common external microwave magnetic field. The applied microwave magnetic field stabilizes and enhances the regions of synchronization in the parameter space of our analysis, where the oscillators are exhibiting synchronized oscillations thereby emitting improved microwave power. To characterize the synchronized oscillations we have calculated the locking range in the domain of external source frequency.

  12. Study and Development of Anti-Islanding Control for Synchronous Machine-Based Distributed Generators: November 2001--March 2004

    SciTech Connect (OSTI)

    Ye, Z.

    2006-03-01T23:59:59.000Z

    This report summarizes the study and development of new active anti-islanding control schemes for synchronous machine-based distributed generators, including engine generators and gas turbines.

  13. Hierarchical classification of modulation signals

    E-Print Network [OSTI]

    Kim, Nam Jin

    2002-01-01T23:59:59.000Z

    This thesis addresses the problem of classifying both analog and digital modulation signals using different kinds of classifiers. The classification of modulation signals has both civilian and military applications. A total of 31 statistical signal...

  14. A continuous traffic study as a source of input data for the computation of operating ratios for selected weight brackets

    E-Print Network [OSTI]

    Jones, James Davis

    1966-01-01T23:59:59.000Z

    Purpose Scope Need for Adequate Cost Data Methods and Procedures HISTORICAL DEVELOPMENT OF FREIGHT TRAFFIC STUDIES Xn tro due t ion Waybill Studies Special Purpose Studies General Purpose Studies Continuous Waybi, ll Sample Sample Selection... Uses of Waybill Data Freight Bill Studies One' Day Studies Fixed Period Studies Continuous Traffic Studies Continuous Traffic Study and the Regulatory Body Summary METHODOLOGY sge 1 2 4 ) 'I 1 1 2i 21 22 26 27 27 37 38 40 42...

  15. Traffic-related air pollution exposures and changes in heart rate variability in Mexico City: A panel study

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    to traffic-related air pollution and the risk of coronaryof particulate air pollution. Environ Health Perspect 2001,between ambient air pollution and daily mortality among

  16. Mutual synchronization of two stacks of intrinsic Josephson junctions in cuprate superconductors

    SciTech Connect (OSTI)

    Lin, Shi-Zeng [Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

    2014-05-07T23:59:59.000Z

    Certain high-T{sub c} cuprate superconductors, which naturally realize a stack of Josephson junctions, thus can be used to generate electromagnetic waves in the terahertz region. A plate-like single crystal with 10{sup 4} junctions without cavity resonance was proposed to achieve strong radiation. For this purpose, it is required to synchronize the Josephson plasma oscillation in all junctions. In this work, we propose to use two stacks of junctions shunted in parallel to achieve synchronization. The two stacks are mutually synchronized in the whole IV curve, and there is a phase shift between the plasma oscillation in the two stacks. The phase shift is nonzero when the number of junctions in different stacks is the same, while it can be arbitrary when the number of junctions is different. This phase shift can be tuned continuously by applying a magnetic field when all the junctions are connected by superconducting wires.

  17. Real-Time Traffic Information for Emergency Evacuation Operations: Phase A Final Report

    SciTech Connect (OSTI)

    Franzese, Oscar [ORNL; Zhang, Li [Mississippi State University (MSU); Mahmoud, Anas M. [Mississippi State University (MSU); Lascurain, Mary Beth [ORNL; Wen, Yi [Mississippi State University (MSU)

    2010-05-01T23:59:59.000Z

    There are many instances in which it is possible to plan ahead for an emergency evacuation (e.g., an explosion at a chemical processing facility). For those cases, if an accident (or an attack) were to happen, then the best evacuation plan for the prevailing network and weather conditions would be deployed. In other cases (e.g., the derailment of a train transporting hazardous materials), there may not be any previously developed plan to be implemented and decisions must be made ad-hoc on how to proceed with an emergency evacuation. In both situations, the availability of real-time traffic information plays a critical role in the management of the evacuation operations. To improve public safety during a vehicular emergency evacuation it is necessary to detect losses of road capacity (due to incidents, for example) as early as possible. Once these bottlenecks are identified, re-routing strategies must be determined in real-time and deployed in the field to help dissipate the congestion and increase the efficiency of the evacuation. Due to cost constraints, only large urban areas have traffic sensor deployments that permit access to some sort of real-time traffic information; any evacuation taking place in any other areas of the country would have to proceed without real-time traffic information. The latter was the focus of this SERRI/DHS (Southeast Region Research Initiative/Department of Homeland Security) sponsored project. That is, the main objective on the project was to improve the operations during a vehicular emergency evacuation anywhere by using newly developed real-time traffic-information-gathering technologies to assess traffic conditions and therefore to potentially detect incidents on the main evacuation routes. Phase A of the project consisted in the development and testing of a prototype system composed of sensors that are engineered in such a way that they can be rapidly deployed in the field where and when they are needed. Each one of these sensors is also equipped with their own power supply and a GPS (Global Positioning System) device to auto-determine its spatial location on the transportation network under surveillance. The system is capable of assessing traffic parameters by identifying and re-identifying vehicles in the traffic stream as those vehicles pass over the sensors. The system of sensors transmits, through wireless communication, real-time traffic information (travel time and other parameters) to a command and control center via an NTCIP (National Transportation Communication for ITS Protocol) -compatible interface. As an alternative, an existing NTCIP-compatible system accepts the real-time traffic information mentioned and broadcasts the traffic information to emergency managers, the media and the public via the existing channels. A series of tests, both in a controlled environment and on the field, were conducted to study the feasibility of rapidly deploying the system of traffic sensors and to assess its ability to provide real-time traffic information during an emergency evacuation. The results of these tests indicated that the prototype sensors are reliable and accurate for the type of application that is the focus of this project.

  18. Coupled hardware and software architecture for programmable digital signal processors

    SciTech Connect (OSTI)

    Lee, E.A.

    1986-01-01T23:59:59.000Z

    Programmable signal-processor architectures using extensive concurrency are considered together with the programming of such architectures. A synchronous data flow (SDF) programming paradigm, a special case of data flow (either large grain or atomic), is proposed as an attractive way of partitioning signal-processing algorithms for concurrent execution on homogeneous parallel processors sharing memory. SDF programs are directed graphs where each arc represents a signal path and each node represents an operation. The number of samples consumed or produced each time a node is invoked is specified for each input or output path of each node. A SDF graph can be statically scheduled onto parallel processors, so the run-time overhead usually associated with data flow evaporates. It is shown how to identify errors in the construction of an SDF graph, such as sample-rate inconsistencies and directed loops with insufficient delay. It is proved that a broad class of algorithms will find a periodic schedule if one exists and give specific algorithms, for both single and parallel processors. In addition to homogeneous parallel processors, SDF can be used to program extensively pipelined single-processor architectures using an old but rarely used architectural approach. Multiple processes are interleaved through a single deeply pipelined processor.

  19. Time Synchronization Attack in Smart Grid-Part I: Impact and Analysis

    E-Print Network [OSTI]

    Zhang, Zhenghao; Dimitrovski, Aleksandar D; Li, Husheng

    2012-01-01T23:59:59.000Z

    Many operations in power grids, such as fault detection and event location estimation, depend on precise timing information. In this paper, a novel Time Synchronization Attack (TSA) is proposed to attack the timing information in smart grid. Since many applications in smart grid utilize synchronous measurements and most of the measurement devices are equipped with global positioning system (GPS) for precise timing, it is highly probable to attack the measurement system by spoofing the GPS. The effectiveness of TSA is demonstrated for three applications of phasor measurement unit (PMU) in smart grid, namely transmission line fault detection, voltage stability monitoring and event locationing. The validity of TSA is demonstrated by numerical simulations.

  20. Energy Signal Tool for Decision Support in Building Energy Systems

    SciTech Connect (OSTI)

    Henze, G. P.; Pavlak, G. S.; Florita, A. R.; Dodier, R. H.; Hirsch, A. I.

    2014-12-01T23:59:59.000Z

    A prototype energy signal tool is demonstrated for operational whole-building and system-level energy use evaluation. The purpose of the tool is to give a summary of building energy use which allows a building operator to quickly distinguish normal and abnormal energy use. Toward that end, energy use status is displayed as a traffic light, which is a visual metaphor for energy use that is either substantially different from expected (red and yellow lights) or approximately the same as expected (green light). Which light to display for a given energy end use is determined by comparing expected to actual energy use. As expected, energy use is necessarily uncertain; we cannot choose the appropriate light with certainty. Instead, the energy signal tool chooses the light by minimizing the expected cost of displaying the wrong light. The expected energy use is represented by a probability distribution. Energy use is modeled by a low-order lumped parameter model. Uncertainty in energy use is quantified by a Monte Carlo exploration of the influence of model parameters on energy use. Distributions over model parameters are updated over time via Bayes' theorem. The simulation study was devised to assess whole-building energy signal accuracy in the presence of uncertainty and faults at the submetered level, which may lead to tradeoffs at the whole-building level that are not detectable without submetering.

  1. Power-Factor and Torque Calculation with Consideration of Cross Saturation of the Interior Permanent Magnet Synchronous Motor with

    E-Print Network [OSTI]

    Tolbert, Leon M.

    motor of a hybrid electric vehicle. I. INTRODUCTION The interior permanent magnet synchronous motor for application in a hybrid electric vehicle. The BFE structure enables the motor to control the magnitude Permanent Magnet Synchronous Motor with Brushless Field Excitation Seong Taek Lee1,2 , Timothy A. Burress1

  2. PHYSICAL REVIEW E 88, 022908 (2013) Synchronization of a Josephson junction array in terms of global variables

    E-Print Network [OSTI]

    Pikovsky, Arkady

    PHYSICAL REVIEW E 88, 022908 (2013) Synchronization of a Josephson junction array in terms of Josephson junctions with a common LCR load. Application of the Watanabe-Strogatz approach [Physica D 74, 197 of oscillating physical systems that being coupled synchronize are Josephson junctions [2]. In theoretical

  3. Analyzing Signals Fourier transform

    E-Print Network [OSTI]

    Sweldens, Wim

    Page 1 1 Analyzing Signals Fourier transform s frequency content s linear combination of sin frequency analysis s windowed Fourier transform 6 #12;Page 4 7 Gabor Transform function to analyze window Gabor Transform Spatial domain Gabor domain b #12;Page 5 9 Gabor Transform Problems s discrete version

  4. Computer controlled synchronous shifting of an automatic transmission

    DOE Patents [OSTI]

    Davis, Roy I. (9214 Abbey La., Ypsilanti, MI 48198); Patil, Prabhakar B. (10294 W. Outer Dr., Detroit, MI 48223)

    1989-01-01T23:59:59.000Z

    A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the torque at the output of the transmission or drive wheels, the speed of the power source, and the hydraulic pressure applied to a clutch and brake. A control algorithm produces input data representing a commanded upshift, a commanded downshift, a commanded transmission output torque, and commanded power source speed. A microprocessor processes the inputs and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake at a rate that satisfies the requirements for a short gear ratio change and smooth torque transfer between the friction elements.

  5. Computer controllable synchronous shifting of an automatic transmission

    DOE Patents [OSTI]

    Davis, R.I.; Patil, P.B.

    1989-08-08T23:59:59.000Z

    A multiple forward speed automatic transmission produces its lowest forward speed ratio when a hydraulic clutch and hydraulic brake are disengaged and a one-way clutch connects a ring gear to the transmission casing. Second forward speed ratio results when the hydraulic clutch is engaged to connect the ring gear to the planetary carrier of a second gear set. Reverse drive and regenerative operation result when an hydraulic brake fixes the planetary and the direction of power flow is reversed. Various sensors produce signals representing the torque at the output of the transmission or drive wheels, the speed of the power source, and the hydraulic pressure applied to a clutch and brake. A control algorithm produces input data representing a commanded upshift, a commanded downshift, a commanded transmission output torque, and commanded power source speed. A microprocessor processes the inputs and produces a response to them in accordance with the execution of a control algorithm. Output or response signals cause selective engagement and disengagement of the clutch and brake at a rate that satisfies the requirements for a short gear ratio change and smooth torque transfer between the friction elements. 6 figs.

  6. this work, we examine acoustic feature changes in time-compressed speech processed using synchronized overlap-add SOLA method. Also,

    E-Print Network [OSTI]

    Russell, Daniel A.

    synchronized overlap-add SOLA method. Also, we discuss which parts of speech consonants or vowels are more

  7. High-speed and high-fidelity system and method for collecting network traffic

    DOE Patents [OSTI]

    Weigle, Eric H. (Los Alamos, NM)

    2010-08-24T23:59:59.000Z

    A system is provided for the high-speed and high-fidelity collection of network traffic. The system can collect traffic at gigabit-per-second (Gbps) speeds, scale to terabit-per-second (Tbps) speeds, and support additional functions such as real-time network intrusion detection. The present system uses a dedicated operating system for traffic collection to maximize efficiency, scalability, and performance. A scalable infrastructure and apparatus for the present system is provided by splitting the work performed on one host onto multiple hosts. The present system simultaneously addresses the issues of scalability, performance, cost, and adaptability with respect to network monitoring, collection, and other network tasks. In addition to high-speed and high-fidelity network collection, the present system provides a flexible infrastructure to perform virtually any function at high speeds such as real-time network intrusion detection and wide-area network emulation for research purposes.

  8. Development of a Web-based Emissions Reduction Calculator for Street Light and Traffic Light Retrofits

    E-Print Network [OSTI]

    Liu, Z.; Gilman, D.; Haberl, J. S.; Culp, C.

    2005-01-01T23:59:59.000Z

    Episode Peak day for 1999 4 . In the design mode the energy and emissions savings are calculated based on the specific information the user provides about the lamp type, lamp code, wattage, and number of lamps for both pre-retrofit and post... for the whole year is 12 hours per day. Traffic Light Analysis: Design Mode Table 2 shows an example of the input information and calculation for traffic light design mode. For each project the user enters the lamp type, lamp code, wattage per lamp...

  9. Offloading Mobile Traffic via Green Content Broker Tao Han, Student Member, IEEE, and Nirwan Ansari, Fellow, IEEE

    E-Print Network [OSTI]

    Ansari, Nirwan

    Offloading Mobile Traffic via Green Content Broker Tao Han, Student Member, IEEE, and Nirwan Ansari, Fellow, IEEE Abstract--A continuous surge of mobile data traffic not only congests mobile networks but also results in a dramatic increase in the energy consumption of mobile networks. Device-to-device (D2D

  10. Detecting Anomalies in Network Traffic Using Maximum Entropy Estimation Yu Gu, Andrew McCallum, Don Towsley

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    the network administrator a multi­ dimensional view of the network traffic. Our method can detect anomalies classes that increase the relative entropy thus providing the network administrator information related1 Detecting Anomalies in Network Traffic Using Maximum Entropy Estimation Yu Gu, Andrew Mc

  11. The impact of high-speed rail and low-cost carriers on European air passenger traffic

    E-Print Network [OSTI]

    Gummadi, Ramakrishna

    The impact of high-speed rail and low-cost carriers on European air passenger traffic Regina R, and market characteristics on air traffic; and 2) the impact of high-speed rail and low-cost in system-wide air travel demand, whereas the expansion of low-cost carriers has led to a significant

  12. The Synchronization Attack and Defense on Energy-Efficient Listen-Sleep Slotted MAC

    E-Print Network [OSTI]

    California at Davis, University of

    Xiaoming Lu, Matt Spear, Karl Levitt and S. Felix Wu Department of Computer Science UC Davis, Davis, CAThe Synchronization Attack and Defense on Energy-Efficient Listen-Sleep Slotted MAC Protocols, many listen- sleep Medium Access Control (MAC) protocols have been pro- posed to reduce energy

  13. Simplified Modelling and Control of a Synchronous Machine with VariableSpeed SixStep Drive

    E-Print Network [OSTI]

    Sanders, Seth

    of electrical power flow in the machine. Cost is a driving factor in the design of such a system, and the power frequency than PWM as well. II. VARIABLE­SPEED ELECTRIC MACHINE DRIVES While the choice of driveSimplified Modelling and Control of a Synchronous Machine with Variable­Speed Six­Step Drive

  14. Author Version -Electromotion Journal, 5, oct. 98, pp. 93-101. SPECIAL SYNCHRONOUS LINEAR ACTUATORS.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of the movement: - the indirect linear drives have been designed from a rotating electric motor as well as from. For long (and possibly unlimited) courses, the direct drives perform better, with the linear induction- coil actuators prove to be the most suitable. This paper focuses primarily on synchronous linear drives

  15. Robust Generator System Using PM Assisted Synchronous Reluctance Generator with Current-fed Drive

    E-Print Network [OSTI]

    Baek, Jeihoon

    2011-02-22T23:59:59.000Z

    action by making the PMa-SynRG operates as a generator, rectifying the phase voltages by means of the three-phase rectifier and feeding the power into the load. These features make the current-fed drive a good candidate for driving any type of synchronous...

  16. Nanomechanical-resonator-induced synchronization in Josephson junction arrays B. R. Trees* and S. Natu

    E-Print Network [OSTI]

    Stroud, David

    , and an interaction energy due to the piezo- electric effect between the NEM and the junctions. Phase lockingNanomechanical-resonator-induced synchronization in Josephson junction arrays B. R. Trees* and S that includes the following effects: the charging and Josephson energies of the junctions, dissipation

  17. Asynchronous or synchronous? A misleading choice. Scott Fairbanks and Simon Moore

    E-Print Network [OSTI]

    Moore, Simon

    elements of so- called asynchronous design in the construction of a so-called synchronous system placing equal delays in all pipeline stages. GasP mixes design elements from the asynchronous design style This work suggests that synchrony and asynchrony are not design choices but rather a collection of design

  18. Radioactivity-Synchronized Fluorescence Enhancement Using a Radionuclide Fluorescence-Quenched Dye

    E-Print Network [OSTI]

    Larson-Prior, Linda

    Radioactivity-Synchronized Fluorescence Enhancement Using a Radionuclide Fluorescence-Quenched Dye that demonstrates the feasibility of altering the fluorescence properties of an organic dye as a function effect on the dye fluorescence. Correlation of the radionuclide decay with the dye fluorescence

  19. Synchronization Assessment in Power Networks and Coupled Oscillators Florian Dorfler, Michael Chertkov, and Francesco Bullo

    E-Print Network [OSTI]

    Bullo, Francesco

    Synchronization Assessment in Power Networks and Coupled Oscillators Florian D¨orfler, Michael. F. D¨orfler and F. Bullo are with the Center for Control, Dynami- cal Systems and Computation Studies at LANL and with New Mexico Consortium, Los Alamos, NM 87544. Email: {dorfler

  20. Spectral Analysis of Synchronization in a Lossless Structure-Preserving Power Network Model

    E-Print Network [OSTI]

    Bullo, Francesco

    Spectral Analysis of Synchronization in a Lossless Structure-Preserving Power Network Model Florian D¨orfler Center for Control, Dynamical Systems, and Computation University of California at Santa Barbara Santa Barbara, CA 93106 Email: dorfler@engineering.ucsb.edu Francesco Bullo Center for Control

  1. Synchronization and Transient Stability in Power Networks and Non-Uniform Kuramoto Oscillators

    E-Print Network [OSTI]

    Florian Dorfler; Francesco Bullo

    2011-06-27T23:59:59.000Z

    Motivated by recent interest for multi-agent systems and smart power grid architectures, we discuss the synchronization problem for the network-reduced model of a power system with non-trivial transfer conductances. Our key insight is to exploit the relationship between the power network model and a first-order model of coupled oscillators. Assuming overdamped generators (possibly due to local excitation controllers), a singular perturbation analysis shows the equivalence between the classic swing equations and a non-uniform Kuramoto model. Here, non-uniform Kuramoto oscillators are characterized by multiple time constants, non-homogeneous coupling, and non-uniform phase shifts. Extending methods from transient stability, synchronization theory, and consensus protocols, we establish sufficient conditions for synchronization of non-uniform Kuramoto oscillators. These conditions reduce to and improve upon previously-available tests for the standard Kuramoto model. Combining our singular perturbation and Kuramoto analyses, we derive concise and purely algebraic conditions that relate synchronization and transient stability of a power network to the underlying system parameters and initial conditions.

  2. Integrating the Army Geospatial Enterprise: Synchronizing Geospatial-Intelligence to the Dismounted James E. Richards

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    de Weck, Olivier L.

    1 Integrating the Army Geospatial Enterprise: Synchronizing Geospatial. #12;2 [This Page Intentionally Left Blank] #12;3 Army`s Geospatial Architecture: delivering Geospatial-Intelligence of complex and urban terrain to the dismounted Soldier by James E. Richards ABSTRACT The Army`s Geospatial

  3. Control Realization for an Interior Permanent Magnet Synchronous Motor (IPMSM) in Automotive Drive Trains

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    Paderborn, Universität

    Control Realization for an Interior Permanent Magnet Synchronous Motor (IPMSM) in Automotive Drive Trains Wilhelm Peters, Tobias Huber, Joachim Böcker Power Electronics and Electrical Drives, Paderborn automotive traction drives are a wide speed range, a wide constant-power operation range and high efficiency

  4. Responding to environmental change: plastic responses1 vary little in a synchronous breeder.2

    E-Print Network [OSTI]

    Nussey, Dan

    The impact of environmental change on animal populations is strongly influenced by the10 ability. 2002).5 Determining how individuals base key life-history decisions on environmental cues is6 therefore1 Responding to environmental change: plastic responses1 vary little in a synchronous breeder.2 3

  5. Synconset Waves and Chains: Spiking Onsets in Synchronous Populations Predict and Are Predicted by

    E-Print Network [OSTI]

    Narayanan, Rishikesh

    Synconset Waves and Chains: Spiking Onsets in Synchronous Populations Predict and Are Predicted Synfire waves are propagating spike packets in synfire chains, which are feedforward chains embedded in random networks. Although synfire waves have proved to be effective quantification for network activity

  6. On Utility Accrual Processor Scheduling with Wait-Free Synchronization for Embedded Real-Time Software

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    Ravindran, Binoy

    On Utility Accrual Processor Scheduling with Wait-Free Synchronization for Embedded Real-Time Software ABSTRACT We present the first wait-free utility accrual (UA) real-time scheduling algorithms for embedded real-time systems. UA scheduling algorithms allow application activities to be sub- ject to time/utility

  7. Back to Basics: Homogeneous Representations of Multi-Rate Synchronous Dataflow Graphs

    E-Print Network [OSTI]

    Al Hanbali, Ahmad

    Synchronous dataflow (SDF) [1] is a popular class of models of computation and is used to model the temporal are particularly useful in the design of systems where worst-case guarantees on performance must be given. An SDF and processing elements. The class of SDF graphs that we focus on in this paper are called multi-rate SDF (MRSDF

  8. Blind Timing and Carrier Synchronization in Decode and Forward Cooperative Systems

    E-Print Network [OSTI]

    Durrani, Salman

    Blind Timing and Carrier Synchronization in Decode and Forward Cooperative Systems Ali A. Nasir for blind channel, timing and carrier offset estimation in a DF cooperative system with one source, M relays and one destination equipped with N antennas. In particular, we exploit blind source separation

  9. Dynamic synchronous/asynchronous replication ASSAF NATANZON,, EMC, Ben-Gurion University

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    Bachmat, Eitan

    A Dynamic synchronous/asynchronous replication ASSAF NATANZON,, EMC, Ben-Gurion University EITAN remotely even if not all previous writes have been Author's addresses: A. Natanzon EMC Corp., Herzlia, Israel and department of Computer Science, Ben- Gurion University, Beer-Sheva, Israel, 84105. assaf.natanzon@emc

  10. Journal of Neuroscience Methods 170 (2008) 96110 Identifying repeating motifs in the activation of synchronized

    E-Print Network [OSTI]

    Jacob, Eshel Ben

    Cultured neuronal networks cultivated on micro-electrode arrays are a widely used tool network; Synchronized bursts; Clustering; In vitro; Culture; Micro-electrode array 1. Introduction Cultured neuronal networks cultivated on micro-electrode arrays are widely used as a tool for investigating

  11. SYNCHRONIZATION OF PALLIDAL ACTIVITY IN THE MPTP PRIMATE MODEL OF PARKINSONISM IS

    E-Print Network [OSTI]

    Bar-Gad, Izhar

    studies in human PD patients have found cells whose discharge is modulated in the tremor frequency range electrode studies revealed that in normal behaving animals most of the crosscorrelograms between pallidal neuronal pairs in the STN of human PD patients (Levy et al., 2000) were also synchronized in a higher

  12. Pattern formation of dipolar colloids in rotating fields: Layering and synchronization

    E-Print Network [OSTI]

    Sebastian Jaeger; Sabine H. L. Klapp

    2011-03-04T23:59:59.000Z

    We report Brownian dynamics (BD) simulation and theoretical results for a system of spherical colloidal particles with permanent dipole moments in a rotating magnetic field. Performing simulations at a fixed packing fraction and dipole coupling parameter, we construct a full non-equilibrium phase diagram as function of the driving frequency ($\\omega_0$) and field strength ($B_0$). This diagram contains both synchronized states, where the individual particles follow the field with (on average) constant phase difference, and asynchronous states. The synchronization is accompanied by layer formation, i.e. by spatial symmetry-breaking, similar to systems of induced dipoles in rotating fields. In the permanent-dipole case, however, too large $\\omega_0$ yield a breakdown of layering, supplemented by complex changes of the single-particle rotational dynamics from synchronous to asynchronous behavior. We show that the limit frequencies $\\omega_c$ can be well described as a bifurcation in the nonlinear equation of motion of a single particle rotating in a viscous medium. Finally, we present a simple density functional theory, which describes the emergence of layers in perfectly synchronized states as an equilibrium phase transition.

  13. Combining Retiming and Recycling to Optimize the Performance of Synchronous Circuits

    E-Print Network [OSTI]

    Carloni, Luca

    Combining Retiming and Recycling to Optimize the Performance of Synchronous Circuits Luca P, CA 94720-1772 Abstract Recycling was recently proposed as a system-level design tech- nique to facilitate the building of complex System-on-Chips (SOC) by assembling pre-designed components. Recycling

  14. Estimating Reliability and Throughput of Source-synchronous Wave-pipelined Interconnect

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    Lemieux, Guy

    , we develop a statistical model of dynamic timing uncertainty. We show that it is important to distinguish between static and dynamic sources of tim- ing uncertainty, because source-synchronous wave pipelin- ing is much more sensitive to the latter. We use HSPICE simulations to develop a model for a wave

  15. A nonlinear observer to estimate unknown parameters during the synchronization of chaotic systems

    E-Print Network [OSTI]

    L. Torres

    2014-06-20T23:59:59.000Z

    This paper proposes an Extended-Kalman-Filter-like observer for parameter estimation during synchronization of chaotic systems. The exponential stability of the observer is guaranteed by a persistent excitation condition. This approach is shown to be suitable for various classical chaotic systems and several simulations are presented accordingly.

  16. Design of optimal digital controller for stable super-high-speed permanent-magnet synchronous

    E-Print Network [OSTI]

    Wu, Thomas

    collaborative design scheme of a super-high-speed permanent-magnet synchronous motor (PMSM) and its digital stability and performance. Since the systematic design of the PMSM can ensure its stability over the full the efficiency and performance of the PMSM. The unique feature in the proposed optimal V/f control is its design

  17. Multi-criteria based design approach of multiphase permanent magnet low speed synchronous machines

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    dedicated to multiphase Permanent Magnet Synchronous Machines (PMSM) supplied by Pulse Width Modulation to use PWM VSI for supplying high power propulsion machines [1]. The induction machines and the PMSM can be easily considered in this instance since the constraint on the reactive power does not apply [2]. PMSM

  18. A Robust Hybrid Current Control for Permanent Magnet Synchronous Motor Drive

    E-Print Network [OSTI]

    Boyer, Edmond

    --Recently, the Permanent Magnet Synchronous Motor (PMSM) find a widespread utilization in modern adjustable AC drives. Comparisons using simulations on a 0.9-kW PMSM confirm that the proposed hybrid current controller gives of the stator current, obtained by using a fast Fourier transform, are used for comparison purposes. Index Terms--PMSM

  19. Direct torque control of permanent magnet synchronous motors with non-sinusoidal back-EMF

    E-Print Network [OSTI]

    Ozturk, Salih Baris

    2009-05-15T23:59:59.000Z

    torque control of permanent magnet synchronous motor (PMSM) with sinusoidal back-EMF is discussed in detail. Secondly, the proposed two-phase conduction mode for DTC of BLDC motors is introduced in the constant torque region. In this control scheme, only...

  20. Abstract --This paper presents a theoretical approach as far as faulty Permanent Magnet Synchronous Machines

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Synchronous Machines (PMSM) are concerned. The knowledge of PMSM's behavior under inter-turn fault is very detection often require faulty models. The aim of this paper is to develop a dynamical model of a PMSM under into account of different winding distributions. I. INTRODUCTION One way to study PMSM under inter-turn short