Sample records for look-ahead driver feedback

  1. Vehicle Technologies Office Merit Review 2014: Look-Ahead Driver Feedback and Powertrain Management

    Broader source: Energy.gov [DOE]

    Presentation given by Eaton at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about look-ahead driver feedback and...

  2. Look-ahead Driver Feedback and Powertrain Management

    SciTech Connect (OSTI)

    Verma, Rajeev

    2014-12-31T23:59:59.000Z

    Commercial medium and heavy vehicles, though only a small portion of total vehicle population, play a significant role in energy consumption. In 2012, these vehicles accounted for about 5775.5 trillion btu of energy consumption and 408.8 million tons of CO2 emissions annually, which is a quarter of the total energy burden of highway transportation in the United States [1]. This number is expected to surpass passenger car fuel use within the next few decades. In the meantime, most commercial vehicle fleets are running at a very low profit margin. It is a wellknown fact that fuel economy can vary significantly between drivers, even when they operate the same vehicle on the same route. According to the US Environmental Protection Agency (EPA) and Natural Resource Canada (NRCan), there is up to 35% fuel economy difference between drivers within the same commercial fleet [2] [3], [4]. Similar results were obtained from a Field Operation Test conducted by Eaton Corporation [5]. During this test as much as 30% fuel economy difference was observed among pick-up-and-delivery drivers and 11% difference was observed among line-haul drivers. The driver variability can be attributed to the fact that different drivers react differently to driving conditions such as road grade, traffic, speed limits, etc. For instance, analysis of over 600k miles of naturalistic heavy duty truck driving data [5] indicates that an experienced driver anticipates a downhill and eases up on the throttle to save fuel while an inexperienced driver lacks this judgment.

  3. Look-Ahead Driver Feedback and Powertrain Management

    Broader source: Energy.gov [DOE]

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

  4. Look-ahead Driver Feedback and Powertrain Management | Department of Energy

    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 DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment ofLetterEconomy andTerms Loan TermsLong IslandSummaryDepartment

  5. The Navy's Program in Nanoscience and Nanotechnology A Look Ahead

    E-Print Network [OSTI]

    Maryland at College Park, University of

    The Navy's Program in Nanoscience and Nanotechnology ­ A Look Ahead Robert Kavetsky Office of Naval Research 800 North Quincy Street, Arlington, VA., USA Robert_Kavetsky@onr.navy.mil ABSTRACT The Navy to building the "Navy After Next". The Office of Naval Research provided a leadership role in exploring those

  6. Analyzing Fuel Saving Opportunities through Driver Feedback Mechanisms...

    Office of Environmental Management (EM)

    Fuel Saving Opportunities through Driver Feedback Mechanisms 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer...

  7. Quantifying Benefits of Demand Response and Look-ahead Dispatch in Systems

    E-Print Network [OSTI]

    Quantifying Benefits of Demand Response and Look-ahead Dispatch in Systems with Variable Resources Electric Energy System #12;#12;Quantifying Benefits of Demand Response and Look-ahead Dispatch in Systems benefits correspond to a real-world power system, as we use actual data on demand-response and wind

  8. An Optimization Framework for Driver Feedback Systems

    SciTech Connect (OSTI)

    Malikopoulos, Andreas [ORNL; Aguilar, Juan P. [Georgia Institute of Technology

    2013-01-01T23:59:59.000Z

    Modern vehicles have sophisticated electronic control units that can control engine operation with discretion to balance fuel economy, emissions, and power. These control units are designed for specific driving conditions (e.g., different speed profiles for highway and city driving). However, individual driving styles are different and rarely match the specific driving conditions for which the units were designed. In the research reported here, we investigate driving-style factors that have a major impact on fuel economy and construct an optimization framework to optimize individual driving styles with respect to these driving factors. In this context, we construct a set of polynomial metamodels to reflect the responses produced in fuel economy by changing the driving factors. Then, we compare the optimized driving styles to the original driving styles and evaluate the effectiveness of the optimization framework. Finally, we use this proposed framework to develop a real-time feedback system, including visual instructions, to enable drivers to alter their driving styles in response to actual driving conditions to improve fuel efficiency.

  9. Active Gaze, Visual Look-Ahead, and Locomotor Control Richard M. Wilkie

    E-Print Network [OSTI]

    Allison, Robert

    patterns, but errors were reduced when peripheral monitoring of obstacles was allowed. A steering model () that may, or may not, remain constant. Another simple control heuristic is to base steering purelyActive Gaze, Visual Look-Ahead, and Locomotor Control Richard M. Wilkie University of Leeds John P

  10. (Smart) Look-Ahead Arc Consistency and the Pursuit of CSP Tractability

    E-Print Network [OSTI]

    Dalmau, Victor

    (Smart) Look-Ahead Arc Consistency and the Pursuit of CSP Tractability Hubie Chen 1 and V#19. The constraint satisfaction problem (CSP) can be formu- lated as the problem of deciding, given a pair (A; B) of relational struc- tures, whether or not there is a homomorphism from A to B. Although the CSP is in general

  11. Analyzing Vehicle Fuel Saving Opportunities through Intelligent Driver Feedback

    SciTech Connect (OSTI)

    Gonder, J.; Earleywine, M.; Sparks, W.

    2012-06-01T23:59:59.000Z

    Driving style changes, e.g., improving driver efficiency and motivating driver behavior changes, could deliver significant petroleum savings. This project examines eliminating stop-and-go driving and unnecessary idling, and also adjusting acceleration rates and cruising speeds to ideal levels to quantify fuel savings. Such extreme adjustments can result in dramatic fuel savings of over 30%, but would in reality only be achievable through automated control of vehicles and traffic flow. In real-world driving, efficient driving behaviors could reduce fuel use by 20% on aggressively driven cycles and by 5-10% on more moderately driven trips. A literature survey was conducted of driver behavior influences, and pertinent factors from on-road experiments with different driving styles were observed. This effort highlighted important driver influences such as surrounding vehicle behavior, anxiety over trying to get somewhere quickly, and the power/torque available from the vehicle. Existing feedback approaches often deliver efficiency information and instruction. Three recommendations for maximizing fuel savings from potential drive cycle improvement are: (1) leveraging applications with enhanced incentives, (2) using an approach that is easy and widely deployable to motivate drivers, and (3) utilizing connected vehicle and automation technologies to achieve large and widespread efficiency improvements.

  12. Final Report on the Fuel Saving Effectiveness of Various Driver Feedback Approaches

    SciTech Connect (OSTI)

    Gonder, J.; Earleywine, M.; Sparks, W.

    2011-03-01T23:59:59.000Z

    This final report quantifies the fuel-savings opportunities from specific driving behavior changes, identifies factors that influence drivers' receptiveness to adopting fuel-saving behaviors, and assesses various driver feedback approaches.

  13. Look-Ahead Cruise Control for Heavy Duty Vehicle Platooning Assad Alam1, Jonas Martensson2, and Karl H. Johansson2

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Look-Ahead Cruise Control for Heavy Duty Vehicle Platooning Assad Alam1, Jonas M°artensson2, and Karl H. Johansson2 Abstract-- Vehicle platooning has become important for the vehicle industry. Yet of vehicle platooning is not new. The first investigation into control for heavy vehicle platooning

  14. An 8-bit carry look-ahead adder with 150 ps latency and sub-microwatt power dissipation at 10 GHz

    E-Print Network [OSTI]

    Anna Y. Herr; Quentin P. Herr; Oliver T. Oberg; Ofer Naaman; John X. Przybysz; Pavel Borodulin; Steven B. Shauck

    2012-12-12T23:59:59.000Z

    Reciprocal Quantum Logic combines the speed and power-efficiency of single-flux quantum superconductor devices with design features that are similar to CMOS. We have demonstrated an 8-bit carry look-ahead adder in the technology using combinational gates with fanout of four and non-local interconnect. Measured power dissipation of the fully active circuit is only 510 nW at 6.2GHz. Latency is only 150 ps at a clock rate of 10GHz.

  15. Fermilab | Tevatron | Looking Ahead

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist.New Mexico Feb. 13, 2013Focusreceives

  16. MAGNET DIVISION: A LOOK AHEAD

    E-Print Network [OSTI]

    Ohta, Shigemi

    ;SAFETY: 1279 DAYS = 3.5 YEARS WITHOUT A LOST TIME ACCIDENT CONGRATULATIONS KEEP UP THE GOOD WORK #12; went well. 4 #12;Nuclear Physics Addition of $50M to DOE Nuclear Physics budget Year-long process to develop a Long Range Plan for Nuclear Physics has recently started C-AD's development of an affordable

  17. CX-006901: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Look-Ahead Driver Feedback and Powertrain ManagementCX(s) Applied: B3.6Date: 09/29/2011Location(s): Southfield, MichiganOffice(s): Energy Efficiency and Renewable Energy

  18. CX-006903: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Look-Ahead Driver Feedback and Powertrain ManagementCX(s) Applied: B3.6Date: 09/29/2011Location(s): Ann Arbor, MichiganOffice(s): Energy Efficiency and Renewable Energy, National Energy Technology Laboratory

  19. CX-006904: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Look-Ahead Driver Feedback and Powertrain ManagementCX(s) Applied: B3.6Date: 09/29/2011Location(s): Oak Ridge, TennesseeOffice(s): Energy Efficiency and Renewable Energy

  20. Better Plants Look Ahead Webinar: Text Version

    Broader source: Energy.gov [DOE]

    The Better Plants Program hosted a webinar on January 22, 2015 to review accomplishments to date and detail new initiatives to save partners energy and water. Question and answer session is included. Download presentation slides.

  1. Better Plants 2015 Look Ahead Webinar

    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 DataDepartment of Energy Your Density Isn't Your Destiny: The FutureCommentsEnergyand Sustained Coordination BetterBetter Homes,PLANTS

  2. Letter Report: Looking Ahead at Nuclear Fuel Resources

    SciTech Connect (OSTI)

    J. Stephen Herring

    2013-09-01T23:59:59.000Z

    The future of nuclear energy and its ability to fulfill part of the world’s energy needs for centuries to come depend on a reliable input of nuclear fuel, either thorium or uranium. Obviously, the present nuclear fuel cycle is completely dependent on uranium. Future thorium cycles will also depend on 235U or fissile isotopes separated from used fuel to breed 232Th into fissile 233U. This letter report discusses several emerging areas of scientific understanding and technology development that will clarify and enable assured supplies of uranium and thorium well into the future. At the most fundamental level, the nuclear energy community needs to appreciate the origins of uranium and thorium and the processes of planetary accretion by which those materials have coalesced to form the earth and other planets. Secondly, the studies of geophysics and geochemistry are increasing understanding of the processes by which uranium and thorium are concentrated in various locations in the earth’s crust. Thirdly, the study of neutrinos and particularly geoneutrinos (neutrinos emitted by radioactive materials within the earth) has given an indication of the overall global inventories of uranium and thorium, though little indication for those materials’ locations. Crustal temperature measurements have also given hints of the vertical distribution of radioactive heat sources, primarily 238U and 232Th, within the continental crust. Finally, the evolving technologies for laser isotope separation are indicating methods for reducing the energy input to uranium enrichment but also for tailoring the isotopic vectors of fuels, burnable poisons and structural materials, thereby adding another tool for dealing with long-term waste management.

  3. Better Buildings, Better Plants Overview and Look Ahead

    Broader source: Energy.gov [DOE]

    The Better Buildings, Better Plants Program will host a webinar presentation on some exciting new initiatives and notable energy-saving accomplishments.

  4. Better Buildings, Better Plants Look Ahead - January 22, 2015 | Department

    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 DataDepartment of Energy Your Density Isn't Your Destiny: The FutureCommentsEnergyand Sustained Coordination Better Buildings andof

  5. Better Buildings, Better Plants Look Ahead - January 22, 2015 | Department

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011AT&T, Inc.'s ReplyApplicationCommittee | Department ofBerkeleyBetter2, 2011Socialof

  6. Better Plants Look Ahead Webinar: Presentation Slides | Department of

    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 onYouTube YouTube Note: Since the YouTube platform isEnergy CommitteeDepartmentResidentialBetter Buildings

  7. 9. Driver's Age 13. Driver's Date of Birth 14. Driver's Social Security Number 19. Driver's Telephone

    E-Print Network [OSTI]

    Gering, Jon C.

    of Accident (city, state; if on a highway, give number and nearest community) DRIVER INFORMATION OTHER VEHICLE OR PROPERTY Occupied Unoccupied 17. Driver's Age VEHICLE OPERATED BY UNIVERSITY EMPLOYEE Occupied Unoccupied 8. Driver's Name 16. Driver's Name TRUMAN STATE UNIVERSITY VEHICLE ACCIDENT REPORT NAME AND ADDRESS AREA

  8. Driver eye height measurement

    E-Print Network [OSTI]

    Abrahamson, Anthony Daniel

    1978-01-01T23:59:59.000Z

    DRIVER EYF HEIGHT MFASHRFMENT A Thesis by ANTHONY DANIEL ABRAHAMSON Submitted to the Graduate College of Texas A&M Hniversity in partial fulfillment oi the requirement for the degree of MASTER OF SCIENCE December 1978 Major Subje"t: Civil... Engineering DRIVER EYE HEIGHT MEASUREMENT A Thesis by ANTHONY DANIEL ABRAHAMSON Approved as to style and content by: I (C irman of Committee) (Member) (Memb er ) Head of Department) December 1978 ABSTRACT Driver. Eye Height Neasurement. (December...

  9. Vehicle Management Driver Safety Program

    E-Print Network [OSTI]

    Machel, Hans

    Vehicle Management and Driver Safety Program Manual Facilities & Operations / Finance & Administration Version 2 April 2012 #12;© 2012 University of Alberta. #12;The Vehicle Management and Driver of employment. Driver Acknowledgement I have received the University of Alberta, Vehicle Management and Driver

  10. Analyzing Fuel Saving Opportunities through Driver Feedback Mechanisms

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

    rate * 30%-60% fuel savings possible - With same vehicle and powertrain - Would require vehicletraffic flow automation to actually achieve * On today's roads only incremental...

  11. Analyzing Fuel Saving Opportunities through Driver Feedback Mechanisms |

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011AT&T, Inc.'s Reply Comments AT&T,FACT SAmes LabSystemsof Energy

  12. Approaches to enhance driver situational assessment aids

    E-Print Network [OSTI]

    Jones, Eric M. (Eric Michael)

    2007-01-01T23:59:59.000Z

    Collision warning systems encounter a fundamental trade-off between providing the driver more time in which to respond and alerting the driver unnecessarily. The probability that a driver successfully avoids a hazard ...

  13. Buffer insertion in large circuits using look-ahead and back-off techniques 

    E-Print Network [OSTI]

    Waghmode, Mandar

    2007-04-25T23:59:59.000Z

    G. Practicality . . . . . . . . . . . . . . . . . . . . . . . . . . 36 vii CHAPTER Page VII BOOSTER MODELING AND INSERTION . . . . . . . . . . . 37 A. Delay Models . . . . . . . . . . . . . . . . . . . . . . . . . 37 1. Single Booster... . . . . . . . . . . . . . . . . . . . . . . 39 2. Multiple Boosters . . . . . . . . . . . . . . . . . . . . 43 B. Insertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 C. Experimental Results . . . . . . . . . . . . . . . . . . . . . 46 1. Single Booster...

  14. Workgroup #1 Measuring What Matters --Looking ahead, what data must we have to succeed?

    E-Print Network [OSTI]

    collected under the banner of energy efficiency may also support data needs for demand response and load are needed to forecast future energy demand, which in turn drives the need for new resources, one of which versus Local Data: This document assumes that regional data sets will be aggregated from local data

  15. RSIC after 20 years: a look back and a look ahead

    SciTech Connect (OSTI)

    Maskewitz, B.F.; Roussin, R.W.; Trubev, D.K.

    1983-01-01T23:59:59.000Z

    On the occasion of RSIC's 20th anniversary year, this review includes highlights and lessons learned. In June 1963, the first RSIC Newsletter was published, and information analyses procedures and practices were initiated. Evidence indicates that RSIC served for 20 years as the focal point for the exchange and transfer of radiation transport technology and contributed to the advancement of the state of the art. The original concept is found to be sound: operate an information analysis center by collecting, organizing, evaluating, and analyzing all relevant information and making the information available in a form readily useful to scientists and engineers. Computing technology, a computer-based literature information system, and an advisory service remain important elements of the center. Continuing interaction between the center, developers, and users of information products and services has been a key to RSIC success. A look to the future reflects optimism.

  16. ENERGETIC SYSTEMS AND NANOTECHNOLOGY -A LOOK AHEAD Robert Kavetsky*, Davinder Anand

    E-Print Network [OSTI]

    Maryland at College Park, University of

    the development time for new systems, including those with energetic materials, to be deployed into the fleet. 1-looking vision for the application of new and advanced energetic materials for Naval applications. The Navy has. In the 1990s, 12 new energetic materials developed by the Navy were transitioned into 43 weapons systems

  17. Looking Ahead - Biofuels, H2, & Vehicles: 21st Industry Growth Forum

    SciTech Connect (OSTI)

    Gardner, D.

    2008-10-28T23:59:59.000Z

    This presentation on the future of biofuels, hydrogen, and hybrid vehicles was presented at NREL's 21st Industry Growth Forum in Denver, Colorado, on October 28, 2008.

  18. Energy Education: A Glance Back and a Look Ahead | Department of Energy

    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 onYouTube YouTube Note: Since the YouTube|6721 Federal RegisterHydrogen andResiliency |EfficiencyDepartment ofEducation: A

  19. Breakout Session: A Look Ahead: PV Manufacturing in 10 Years | Department

    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 DataDepartment of Energy Your Density Isn't Your Destiny: The FutureCommentsEnergyandapproximatelyBoostingandDOEBreaking3:of Energy

  20. BPA Turns 75: A Look Back and a Look Ahead | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternativeOperationalAugustDecade Later: AreAugust 19,1 BPA I-5 BoxBPA

  1. Materials from 2014 SunShot Summit Breakout Session: Looking Ahead: PV

    Energy Savers [EERE]

    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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2:Introduction to EnergyDepartment ofMarginal EnergyMaterials for AdvancedManufacturing in

  2. Corrective Feedback and Teacher Development

    E-Print Network [OSTI]

    Ellis, Rod

    2009-01-01T23:59:59.000Z

    types of corrective feedback on ESL student writing. Journaland implicit negative feedback: An empirical study of theof written corrective feedback types. English Language

  3. UWB dual burst transmit driver

    DOE Patents [OSTI]

    Dallum, Gregory E. (Livermore, CA); Pratt, Garth C. (Discovery Bay, CA); Haugen, Peter C. (Livermore, CA); Zumstein, James M. (Livermore, CA); Vigars, Mark L. (Livermore, CA); Romero, Carlos E. (Livermore, CA)

    2012-04-17T23:59:59.000Z

    A dual burst transmitter for ultra-wideband (UWB) communication systems generates a pair of precisely spaced RF bursts from a single trigger event. An input trigger pulse produces two oscillator trigger pulses, an initial pulse and a delayed pulse, in a dual trigger generator. The two oscillator trigger pulses drive a gated RF burst (power output) oscillator. A bias driver circuit gates the RF output oscillator on and off and sets the RF burst packet width. The bias driver also level shifts the drive signal to the level that is required for the RF output device.

  4. Visualization drivers for Geant4

    SciTech Connect (OSTI)

    Beretvas, Andy; /Fermilab

    2005-10-01T23:59:59.000Z

    This document is on Geant4 visualization tools (drivers), evaluating pros and cons of each option, including recommendations on which tools to support at Fermilab for different applications. Four visualization drivers are evaluated. They are OpenGL, HepRep, DAWN and VRML. They all have good features, OpenGL provides graphic output without an intermediate file. HepRep provides menus to assist the user. DAWN provides high quality plots and even for large files produces output quickly. VRML uses the smallest disk space for intermediate files. Large experiments at Fermilab will want to write their own display. They should proceed to make this display graphics independent. Medium experiment will probably want to use HepRep because of it's menu support. Smaller scale experiments will want to use OpenGL in the spirit of having immediate response, good quality output and keeping things simple.

  5. Linear Quantum Feedback Networks

    E-Print Network [OSTI]

    J. Gough; R. Gohm; M. Yanagisawa

    2008-07-15T23:59:59.000Z

    The mathematical theory of quantum feedback networks has recently been developed for general open quantum dynamical systems interacting with bosonic input fields. In this article we show, for the special case of linear dynamical systems Markovian systems with instantaneous feedback connections, that the transfer functions can be deduced and agree with the algebraic rules obtained in the nonlinear case. Using these rules, we derive the the transfer functions for linear quantum systems in series, in cascade, and in feedback arrangements mediated by beam splitter devices.

  6. 4, 615650, 2007 Drivers of storage

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    BGD 4, 615­650, 2007 Drivers of storage water use in Scots pine H. Verbeeck et al. Title Page drivers of storage water use in Scots pine H. Verbeeck1 , K. Steppe2 , N. Nadezhdina3 , M. Op De Beeck1 Correspondence to: H. Verbeeck (hans.verbeeck@ua.ac.be) 615 #12;BGD 4, 615­650, 2007 Drivers of storage water use

  7. Selected Texas Driver Education Instructors’ Feelings About A Driver Education Cultural Awareness Survey

    E-Print Network [OSTI]

    Saint, Nina Jo

    2012-07-16T23:59:59.000Z

    This study examined what items driver education instructors felt should be included in a cultural awareness survey to assess instructors' preparedness to teach a culturally diverse student clientele. In addition, the study examined the ways driver...

  8. Drivers of Future Energy Demand

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade Year-0E (2001)gasoline353/06) 2Yonthly Energy :and1. Total3.9Drivers

  9. P5 Science Drivers: Theory

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for RenewableSpeedingBiomass and BiofuelsOversight BoardP-GlycoproteiniiiScience Drivers:

  10. Software Support for Improved Driver Reliability

    E-Print Network [OSTI]

    Swift, Michael

    .6.23, 2007 esp.c, a serial port driver static int rs_write(struct tty_struct * tty, const unsigned char *buf

  11. Construction of a driver-vehicle model and identification of the driver model parameters

    E-Print Network [OSTI]

    Su, Jemeng

    1981-01-01T23:59:59.000Z

    CONSTRUCTION OF A DRIVER-VEHICLE MODEL AND IDENTIFICATION OF THE DRIVER MODEL PARAMETERS A Thesis by , JEMENG SU Submitted to the Graduate College of Texas A8M University in partial fulfillment of the requiremr nt for the degree of MASTER... OF SCIENCE December 1981 Major Subject: Mechanical Engineering CONSTRUCTION OF A DRIVER-VEHICLE MODEL AND IDENTIFICATION OF THE DRIVER MODEL PARAMETERS A Thesis by JEMENG SU Approved as to style and content by: (Chairman of Committe ) / I...

  12. Construction of a driver-vehicle model and identification of the driver model parameters 

    E-Print Network [OSTI]

    Su, Jemeng

    1981-01-01T23:59:59.000Z

    CONSTRUCTION OF A DRIVER-VEHICLE MODEL AND IDENTIFICATION OF THE DRIVER MODEL PARAMETERS A Thesis by , JEMENG SU Submitted to the Graduate College of Texas A8M University in partial fulfillment of the requiremr nt for the degree of MASTER... OF SCIENCE December 1981 Major Subject: Mechanical Engineering CONSTRUCTION OF A DRIVER-VEHICLE MODEL AND IDENTIFICATION OF THE DRIVER MODEL PARAMETERS A Thesis by JEMENG SU Approved as to style and content by: (Chairman of Committe ) / I...

  13. Track 10: Feedback and Improvement

    Broader source: Energy.gov [DOE]

    ISM Workshop Presentations Knoxville Convention Center, Knoxville, TN August 2009 Track 10: Feedback and Improvement

  14. Driver comprehension of railroad-highway grade crossings

    E-Print Network [OSTI]

    Messick, Jennifer

    1995-01-01T23:59:59.000Z

    each year; however, collisions at grade crossings are still a major concern. In order to continue improving safety at grade crossings, driver comprehension and driver attitudes must be investigated. This research investigated driver comprehension...

  15. 9, 1443714473, 2012 Soil carbon drivers

    E-Print Network [OSTI]

    Ickert-Bond, Steffi

    BGD 9, 14437­14473, 2012 Soil carbon drivers and benchmarks in Earth system models K. E. O. Todd if available. Causes of variation in soil carbon predictions from CMIP5 Earth system models and comparison #12;BGD 9, 14437­14473, 2012 Soil carbon drivers and benchmarks in Earth system models K. E. O. Todd

  16. V-217: Microsoft Windows NAT Driver ICMP Packet Handling Denial...

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

    A vulnerability was reported in the Windows NAT Driver PLATFORM: Windows Server 2012 ABSTRACT: This security update resolves a vulnerability in the Windows NAT Driver in Microsoft...

  17. Vehicle Technologies Office Merit Review 2015: Gate Driver Optimizatio...

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

    Gate Driver Optimization for WBG Applications Vehicle Technologies Office Merit Review 2015: Gate Driver Optimization for WBG Applications Presentation given by Oak Ridge National...

  18. Brazil's Biofuels Scenario: What are the Main Drivers Which will...

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

    Brazil's Biofuels Scenario: What are the Main Drivers Which will Shape Investments in the Long Term? Brazil's Biofuels Scenario: What are the Main Drivers Which will Shape...

  19. An Unlucky Feeling: Overconfidence and Noisy Feedback

    E-Print Network [OSTI]

    Grossman, Zachary; Owens, David

    2010-01-01T23:59:59.000Z

    way that vague or ambiguous feedback may exacerbate overcon?fact that external task-feedback situations may be much lessIncorporating Performance Feedback,” Discussion paper, work-

  20. Feedback and Interference Alignment in Networks

    E-Print Network [OSTI]

    Suh, Changho

    2011-01-01T23:59:59.000Z

    2 Feedback in the Gaussian Interference Channel 2.1Region . . . . . . . . . . . . . . . . 2.5 Feedback Capacity2.6 Role of Feedback . . . . . . . .

  1. Coherent feedback that beats all measurement-based feedback protocols

    E-Print Network [OSTI]

    Jacobs, Kurt

    We show that when the speed of control is bounded, there is a widely applicable minimal-time control problem for which a coherent feedback protocol is optimal, and is faster than all measurement-based feedback protocols, ...

  2. Looking Ahead with a Look Back at the 2nd Annual ARPA-E Energy Innovation Summit

    Broader source: Energy.gov [DOE]

    If you missed the 2nd Annual ARPA-E Energy Innovation Summit featuring some of today's most cutting-edge energy technologies, video from some big names who spoke is available here.

  3. A Framework of Incorporating Spatio-temporal Forecast in Look-ahead Grid Dispatch with Photovoltaic Generation 

    E-Print Network [OSTI]

    Yang, Chen

    2013-05-02T23:59:59.000Z

    Increasing penetration of stochastic photovoltaic (PV) generation into the electric power system poses significant challenges to system operators. In the thesis, we evaluate the spatial and temporal correlations of stochastic PV generation...

  4. Neighborhood Socioeconomic Status, Depression, and Health Status in the Look AHEAD (Action for Health in Diabetes) Study

    E-Print Network [OSTI]

    2011-01-01T23:59:59.000Z

    Theresa Michel, MS Joslin Diabetes Center: Edward S. Horton,Gavard JA, Clouse RE: Depression in Adults with Diabetes.Diabetes Care 1992, 15:1631-1639. 10. Hill- Briggs F, Gary

  5. A Framework of Incorporating Spatio-temporal Forecast in Look-ahead Grid Dispatch with Photovoltaic Generation

    E-Print Network [OSTI]

    Yang, Chen

    2013-05-02T23:59:59.000Z

    , and is shown to have improved performance compared with conventional persistent model. The tradeoff between communication cost and improved forecast quality is studied using realistic data sets collected from California and Colorado. n IEEE 14 bus system test...

  6. Educational hardware for feedback systems

    E-Print Network [OSTI]

    Dancy, Isaac

    2004-01-01T23:59:59.000Z

    This thesis explores a variety of educational feedback systems with an emphasis on developing them for in-class demonstrations and in-depth student projects. The nature of feedback systems means there is never a shortage ...

  7. Attribution Analysis of Cloud Feedback 

    E-Print Network [OSTI]

    Zhou, Chen

    2014-07-15T23:59:59.000Z

    Uncertainty on cloud feedback is the primary contributor to the large spread of equilibrium climate sensitivity (ECS) in climate models. In this study, we compare the short-term cloud feedback in climate models with observations, and evaluate...

  8. Next Generation Environmentally Friendly Driving Feedback Systems...

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

    Environmentally Friendly Driving Feedback Systems Research and Development Next Generation Environmentally Friendly Driving Feedback Systems Research and Development 2012 DOE...

  9. Drawing driver's attention to potentially dangerous objects

    E-Print Network [OSTI]

    Kurugöl, Orc?un

    2008-01-01T23:59:59.000Z

    Drivers often have difficulties noticing potentially dangerous objects due to weather or lighting conditions or when their field of view is restricted. This thesis presents a display method for potentially dangerous objects ...

  10. A Landscape of Driver Mutations in Melanoma

    E-Print Network [OSTI]

    Lander, Eric S.

    Despite recent insights into melanoma genetics, systematic surveys for driver mutations are challenged by an abundance of passenger mutations caused by carcinogenic UV light exposure. We developed a permutation-based ...

  11. Physics at a new Fermilab proton driver

    SciTech Connect (OSTI)

    Geer, Steve; /Fermilab

    2006-04-01T23:59:59.000Z

    In 2004, motivated by the recent exciting developments in neutrino physics, the Fermilab Long Range Planning Committee identified a new high intensity Proton Driver as an attractive option for the future. At the end of 2004 the APS ''Study on the Physics of Neutrinos'' concluded that the future US neutrino program should have, as one of its components, ''A proton driver in the megawatt class or above and neutrino superbeam with an appropriate very large detector capable of observing Cp violation and measuring the neutrino mass-squared differences and mixing parameters with high precision''. The presently proposed Fermilab Proton Driver is designed to accomplish these goals, and is based on, and would help develop, Linear Collider technology. In this paper the Proton Driver parameters are summarized, and the potential physics program is described.

  12. Carbon Price Drivers:Carbon Price Drivers:Carbon Price Drivers:Carbon Price Drivers: AAAAnnnn UpdatedUpdatedUpdatedUpdated Literature ReviewLiterature ReviewLiterature ReviewLiterature Review

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , such as unexpected fluctuations in energy demand, energy prices (e.g., oil, gas, coal) and weather conditions1 Carbon Price Drivers:Carbon Price Drivers:Carbon Price Drivers:Carbon Price Drivers: AAAAnnnn the factors that shape the price of carbon, where one European Union Allowance is equal to one ton of CO2

  13. Driver expectancy in locating automotive controls 

    E-Print Network [OSTI]

    Francis, Dawn Suzette

    1990-01-01T23:59:59.000Z

    DRIVER EXPECTANCY IN LOCATING AUTOMOTIVE CONTROLS A Thesis by DAWN SUZETTE FRANCIS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1990... Major Subject: Industrial Engineering DRIVER EXPECTANCY IN LOCATING AUTOMOTIVE CONTROLS A Thesis by DAWN SUZETTE FRANCIS Approved as to style and content by: R. Dale Huchi son (Chair of Committee) Rodger . . ppa (Member) Waymon L ohnston (M er...

  14. Drivers of Commercial Building Operator Skills

    E-Print Network [OSTI]

    Domanski, J.

    2011-01-01T23:59:59.000Z

    0 Drivers of Commercial Building Operator Skills C&W OVERVIEW C&W SUSTAINABILITY STRATEGIES GROUP WHAT?S DRIVING THE NEED FOR TRAINING? NECESSARY SKILLS & KNOWLEDGE C&W DEVELOPMENT & TRAINING OPPORTUNITIES International Conference... from: ? Owners/investors 4 DRIVERS ? OWNER/INVESTOR DEMAND ?UN Global Compact / Accenture 2010 CEO survey: ?93% of CEOs believe sustainability is ?critical? ?96% believe should be integrated into core business/operations ?C&W 2011survey...

  15. Regenerative feedback resonant circuit

    DOE Patents [OSTI]

    Jones, A. Mark; Kelly, James F.; McCloy, John S.; McMakin, Douglas L.

    2014-09-02T23:59:59.000Z

    A regenerative feedback resonant circuit for measuring a transient response in a loop is disclosed. The circuit includes an amplifier for generating a signal in the loop. The circuit further includes a resonator having a resonant cavity and a material located within the cavity. The signal sent into the resonator produces a resonant frequency. A variation of the resonant frequency due to perturbations in electromagnetic properties of the material is measured.

  16. Local Danger Warnings for Drivers: The Effect of Modality and Level of Assistance on Driver Reaction

    E-Print Network [OSTI]

    Theune, Mariët

    Local Danger Warnings for Drivers: The Effect of Modality and Level of Assistance on Driver¨ucken, Germany christian.mueller@dfki.de ABSTRACT Local danger warning is an important function of Advanced presentation) is particularly crucial to a successful danger avoidance. We present a user study investigating

  17. Feedback | DOE PAGES

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) Environmental Assessments (EA)Budget » FYU.S. DOE Office ofPublic Access Feedback

  18. Detection of Driver Fatigue Caused by Sleep Deprivation

    E-Print Network [OSTI]

    Coughlin, Joseph F.

    This paper aims to provide reliable indications of driver drowsiness based on the characteristics of driver-vehicle interaction. A test bed was built under a simulated driving environment, and a total of 12 subjects ...

  19. Evaluation of teenage driver understanding of traffic control devices

    E-Print Network [OSTI]

    Ford, Garry Lee

    1999-01-01T23:59:59.000Z

    This research documents the evaluation of teenage graphics. drivers with regards to their understanding of 53 traffic control devices. A multiple choice survey was developed and administered to a group of teenage drivers between 15 and 18 years...

  20. Feedback-optimized parallel tempering Monte Carlo

    E-Print Network [OSTI]

    Katzgraber, H G; Trebst, S; Huse, D A; Troyer, M

    2006-01-01T23:59:59.000Z

    brie?y discuss possible feedback schemes for systems that1742-5468/06/P03018+22$30.00 Feedback-optimized parallel5468/2006/03/P03018 Feedback-optimized parallel tempering

  1. Feedback in the Emergency Medicine Clerkships

    E-Print Network [OSTI]

    Bernard, Aaron W; Kman, Nicholas E; Khandelwal, Sorabh

    2011-01-01T23:59:59.000Z

    4. Branch WT, Paranjape A. Feedback and reflection: teachingDA, Choo EK. Providing feedback in the emergency department.26. Richardson BK. Feedback. Acad Emerg Med. 2004;11:1283e1–

  2. Solar Supply Chain and Market Driver Analysis 

    E-Print Network [OSTI]

    Martinez, Nicholas 1990-

    2012-05-09T23:59:59.000Z

    This study aims to explore the evolution of the photovoltaic supply chain in the United States and the drivers which foster growth of the solar market. The study will gather knowledge on the growth of the solar market and roles of different firms...

  3. MOTOR VEHICLE USE PROGRAM DRIVER SAFETY TIPS

    E-Print Network [OSTI]

    MOTOR VEHICLE USE PROGRAM DRIVER SAFETY TIPS Observe Speed Limits and Traffic Laws ­ Allow - Employees who drive Institute or privately owned vehicles on Institute business must possess and carry person. Insurance - Employees who operate their privately owned vehicles on Institute business shall

  4. CRAD, Feedback and Continuous Improvement - DOE Headquarters...

    Office of Environmental Management (EM)

    CRAD, Feedback and Continuous Improvement - DOE Headquarters - December 4, 2007 CRAD, Feedback and Continuous Improvement - DOE Headquarters - December 4, 2007 December 4, 2007...

  5. Coherent feedback that beats all measurement-based feedback protocols

    E-Print Network [OSTI]

    Kurt Jacobs; Xiaoting Wang; Howard M. Wiseman

    2014-07-21T23:59:59.000Z

    We show that when the speed of control is bounded, there is a widely applicable minimal-time control problem for which a coherent feedback protocol is optimal, and is faster than all measurement-based feedback protocols, where the latter are defined in a strict sense. The superiority of the coherent protocol is due to the fact that it can exploit a geodesic path in Hilbert space, a path that measurement-based protocols cannot follow.

  6. Driver expectancy in locating automotive controls

    E-Print Network [OSTI]

    Francis, Dawn Suzette

    1990-01-01T23:59:59.000Z

    Major Subject: Industrial Engineering DRIVER EXPECTANCY IN LOCATING AUTOMOTIVE CONTROLS A Thesis by DAWN SUZETTE FRANCIS Approved as to style and content by: R. Dale Huchi son (Chair of Committee) Rodger . . ppa (Member) Waymon L ohnston (M er... assessment of automotive industry practices in 1971 and concluded that only 50% of controls/displays on various models could be said to have a common location. Perel (1974) reviewed prior research and found that it would be difficult to pinpoint...

  7. University of Edinburgh Feedback Standards & Guiding Principles

    E-Print Network [OSTI]

    Edinburgh, University of

    1 University of Edinburgh Feedback Standards & Guiding Principles Feedback plays a vital role out the standards required of feedback at Edinburgh, together with a framework of guiding principles within timetabled classes (tutorials, practicals, lectures) as well as more informally. And feedback

  8. Feedback control of spin systems

    E-Print Network [OSTI]

    Claudio Altafini

    2006-01-03T23:59:59.000Z

    The feedback stabilization problem for ensembles of coupled spin 1/2 systems is discussed from a control theoretic perspective. The noninvasive nature of the bulk measurement allows for a fully unitary and deterministic closed loop. The Lyapunov-based feedback design presented does not require spins that are selectively addressable. With this method, it is possible to obtain control inputs also for difficult tasks, like suppressing undesired couplings in identical spin systems.

  9. Feedback, power control, and beamforming : methods for situational aware wireless networks

    E-Print Network [OSTI]

    Huang, Yichao

    2012-01-01T23:59:59.000Z

    Imperfect Feedback . . . . . . . . . . . . . . . . . . . .2.4.1 Imperfect Feedback Model . . . . . . . . . . .4.3 Full Feedback Analysis . . . . . . .

  10. Improved gauge driver for the generalized harmonic Einstein system

    SciTech Connect (OSTI)

    Lindblom, Lee; Szilagyi, Bela [Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States)

    2009-10-15T23:59:59.000Z

    A new gauge driver is introduced for the generalized harmonic (GH) representation of Einstein's equation. This new driver allows a rather general class of gauge conditions to be implemented in a way that maintains the hyperbolicity of the combined evolution system. This driver is more stable and effective and, unlike previous drivers, allows stable evolutions using the dual-frame evolution technique. Appropriate boundary conditions for this new gauge driver are constructed, and a new boundary condition for the 'gauge' components of the spacetime metric in the GH Einstein system is introduced. The stability and effectiveness of this new gauge driver are demonstrated through numerical tests, which impose a new damped-wave gauge condition on the evolutions of single black-hole spacetimes.

  11. Regulatory Drivers | netl.doe.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection Technical s o Freiberg and SondershausenRegulatory Drivers In July 7,

  12. analysis identifies driver: Topics by E-print Network

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

    et al. 2010 Invasive sensors to monitor physiological signals EEG, ECG, pulse@utdallas.edu MSP - CRSS Long-Term Goal: Monitoring Driver Behavior 5 "%"&'(...

  13. aged drivers: Topics by E-print Network

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

    et al. 2010 Invasive sensors to monitor physiological signals EEG, ECG, pulse@utdallas.edu MSP - CRSS Long-Term Goal: Monitoring Driver Behavior 5 "%"&'(...

  14. Negative feedback confers mutational robustness in yeast transcription factor regulation

    E-Print Network [OSTI]

    Denby, Charles

    2012-01-01T23:59:59.000Z

    is! possible! that! feedback! does! not! reduce! expression!positive! and! negative! feedback. ! An! alternative!reporter! to! test! for! feedback. ! The! general! approach!

  15. Carrier and Timing Synchronization of BPSK via LDPC Code Feedback

    E-Print Network [OSTI]

    Valles, Esteban

    2007-01-01T23:59:59.000Z

    using code constraint feedback,” IEEE CommunicationsQPSK using soft decision feedback,” Proc. IEEE 44th Allertonof BPSK via LDPC Code Feedback Esteban L. Vall´ s, Richard

  16. Transmit beamforming for multiple antenna systems with imperfect feedback

    E-Print Network [OSTI]

    Isukapalli, Yogananda R.

    2009-01-01T23:59:59.000Z

    2.3 A General Framework for Feedback Imperfections . . . . .FDD with Finite Rate Feedback (FDDQ) System . 2.3.3 TDDModeling of Imperfect Feedback and Error Probability

  17. Quasar Structure and Cosmological Feedback

    E-Print Network [OSTI]

    Martin Elvis

    2006-06-05T23:59:59.000Z

    Feedback from quasars and AGNs is being invoked frequently in several cosmological settings. Currently, order of magnitude, or more, uncertainties in the structure of both the wind and the 'obscuring torus' make predictions highly uncertain. To make testable models of this 'cosmological feedback' it is essential to understand the detailed structure of AGNs sufficiently well to predict their properties for the whole quasar population, at all redshifts. Progress in both areas is rapid, and I describe the near-term prospects for reducing these uncertainties for 'slow' (non-relativistic) AGN winds and the obscuring torus.

  18. Feedback-assisted ponderomotive squeezing

    E-Print Network [OSTI]

    David Vitali; Paolo Tombesi

    2010-12-11T23:59:59.000Z

    We analyze how the radiation pressure interaction between a mechanical element and an intensely driven optical cavity mode can be exploited for generating squeezed light. We study in particular how the performance of the optomechanical device can be improved when a homodyne-based feedback loop is added to control the motion of the mechanical element of the system. We show that, when driving the cavity at resonance, an appropriate proportional feedback control is able to improve the generation of ponderomotive squeezing, which should be detectable with state-of-the-art apparatuses.

  19. Evaluation and Feedback of Medical Students Rotating in Emergency Medicine: A Model for Comprehensive Evaluation and Swift Feedback

    E-Print Network [OSTI]

    Banh, Kenny; Weichenthal, Lori; Snowden, Brandy

    2008-01-01T23:59:59.000Z

    importance of Evaluation and Feedback of Medical StudentsEvaluation and Swift Feedback Kenny Banh, MD; Loriand providing quality feedback to medical students who

  20. Material feedback in digital design tools

    E-Print Network [OSTI]

    Stanton, Christian J

    2009-01-01T23:59:59.000Z

    How do design tools feedback material behavior to the designer? Digital design tools in use by designers today provide a rich environment for design of form but offer little feedback of the material that ultimately realize ...

  1. 6.302 Feedback Systems, Fall 2002

    E-Print Network [OSTI]

    Lundberg, Kent H.

    Introduction to design of feedback systems. Properties and advantages of feedback systems. Time-domain and frequency-domain performance measures. Stability and degree of stability. Nyquist criterion. Frequency-domain design. ...

  2. MANEUVER REGULATION, TRANSVERSE FEEDBACK LINEARIZATION, AND ZERO

    E-Print Network [OSTI]

    Maggiore, Manfredi

    MANEUVER REGULATION, TRANSVERSE FEEDBACK LINEARIZATION, AND ZERO DYNAMICS Chris Nielsen,1 Manfredi focus is on output maneuver regulation where stabilizing transverse dynamics is a key requirement. Keywords: Maneuver regulation, path following, feedback linearization, zero dynamics, non-square systems

  3. LFSC - Linac Feedback Simulation Code

    SciTech Connect (OSTI)

    Ivanov, Valentin; /Fermilab

    2008-05-01T23:59:59.000Z

    The computer program LFSC (Feedback Simulation Code>) is a numerical tool for simulation beam based feedback in high performance linacs. The code LFSC is based on the earlier version developed by a collective of authors at SLAC (L.Hendrickson, R. McEwen, T. Himel, H. Shoaee, S. Shah, P. Emma, P. Schultz) during 1990-2005. That code was successively used in simulation of SLC, TESLA, CLIC and NLC projects. It can simulate as pulse-to-pulse feedback on timescale corresponding to 5-100 Hz, as slower feedbacks, operating in the 0.1-1 Hz range in the Main Linac and Beam Delivery System. The code LFSC is running under Matlab for MS Windows operating system. It contains about 30,000 lines of source code in more than 260 subroutines. The code uses the LIAR ('Linear Accelerator Research code') for particle tracking under ground motion and technical noise perturbations. It uses the Guinea Pig code to simulate the luminosity performance. A set of input files includes the lattice description (XSIF format), and plane text files with numerical parameters, wake fields, ground motion data etc. The Matlab environment provides a flexible system for graphical output.

  4. The Greenhouse Effect without Feedbacks

    E-Print Network [OSTI]

    The Greenhouse Effect without Feedbacks #12;Three Pillars Behind Climate Change! #12;1. Global. Greenhouse Gases have been on the increase. #12;3. The Greenhouse effect is a powerful theory that explains! natural greenhouse effect! · an empirical introduction #12;Moral of the story: The doubling of CO2 causes

  5. CLAIMANT AUTO ACCIDENT REPORT For Completion by Driver

    E-Print Network [OSTI]

    Tullos, Desiree

    CLAIMANT AUTO ACCIDENT REPORT For Completion by Driver D E P A R T M E N T O F A D M I N I S T R Address City State Zip For what purpose was car being used at time of accident? Has damage been repaired signals did you give? Other Driver? Who investigated? Who Cited and Why? Describe Accident CONTINUE

  6. Ris Energy Report 5 Global drivers for transformation of energy systems 3 Global drivers for transformation of energy

    E-Print Network [OSTI]

    of greenhouse gases has brought a new political rationale for the development of more climate-friendly energy in the global energy market of rapidly-expanding national economies, notably China and India. TogetherRisø Energy Report 5 Global drivers for transformation of energy systems 3 Global drivers

  7. Nonlinear transmission line based electron beam driver

    SciTech Connect (OSTI)

    French, David M.; Hoff, Brad W.; Tang Wilkin; Heidger, Susan; Shiffler, Don [Directed Energy Directorate, Air Force Research Laboratory, Kirtland AFB, New Mexico 87117 (United States); Allen-Flowers, Jordan [Program in Applied Mathematics, University of Arizona, Tucson, Arizona 85721 (United States)

    2012-12-15T23:59:59.000Z

    Gated field emission cathodes can provide short electron pulses without the requirement of laser systems or cathode heating required by photoemission or thermionic cathodes. The large electric field requirement for field emission to take place can be achieved by using a high aspect ratio cathode with a large field enhancement factor which reduces the voltage requirement for emission. In this paper, a cathode gate driver based on the output pulse train from a nonlinear transmission line is experimentally demonstrated. The application of the pulse train to a tufted carbon fiber field emission cathode generates short electron pulses. The pulses are approximately 2 ns in duration with emission currents of several mA, and the train contains up to 6 pulses at a frequency of 100 MHz. Particle-in-cell simulation is used to predict the characteristic of the current pulse train generated from a single carbon fiber field emission cathode using the same technique.

  8. Design consistency and driver error as reflected by driver workload and accident rates

    E-Print Network [OSTI]

    Wooldridge, Mark Douglas

    1992-01-01T23:59:59.000Z

    primary directions, speed consistency and driver workload. Speed consistency consists of analyzing predicted speeds on a highway and striving to keep those speeds within a narrow range. Several major research studies have provided methodologies... participating in the Texas Department of Transportation's Masters in Civil Engineering (MSCE) program, and performed the research that formed the basis for this report under the auspices of the Texas Transportation Institute. The data used as a basis...

  9. Rf Feedback free electron laser

    DOE Patents [OSTI]

    Brau, Charles A. (Los Alamos, NM); Swenson, Donald A. (Los Alamos, NM); Boyd, Jr., Thomas J. (Los Alamos, NM)

    1981-01-01T23:59:59.000Z

    A free electron laser system and electron beam system for a free electron laser which use rf feedback to enhance efficiency. Rf energy is extracted from an electron beam by decelerating cavities and returned to accelerating cavities using rf returns such as rf waveguides, rf feedthroughs, etc. This rf energy is added to rf klystron energy to lower the required input energy and thereby enhance energy efficiency of the system.

  10. Probabilistic models for feedback systems.

    SciTech Connect (OSTI)

    Grace, Matthew D.; Boggs, Paul T.

    2011-02-01T23:59:59.000Z

    In previous work, we developed a Bayesian-based methodology to analyze the reliability of hierarchical systems. The output of the procedure is a statistical distribution of the reliability, thus allowing many questions to be answered. The principal advantage of the approach is that along with an estimate of the reliability, we also can provide statements of confidence in the results. The model is quite general in that it allows general representations of all of the distributions involved, it incorporates prior knowledge into the models, it allows errors in the 'engineered' nodes of a system to be determined by the data, and leads to the ability to determine optimal testing strategies. In this report, we provide the preliminary steps necessary to extend this approach to systems with feedback. Feedback is an essential component of 'complexity' and provides interesting challenges in modeling the time-dependent action of a feedback loop. We provide a mechanism for doing this and analyze a simple case. We then consider some extensions to more interesting examples with local control affecting the entire system. Finally, a discussion of the status of the research is also included.

  11. Feedback and its Feedback Effect on Feedback: Photoionization Suppression and its Impact on Galactic Outflows

    E-Print Network [OSTI]

    Matthew M. Pieri; Hugo Martel

    2007-05-02T23:59:59.000Z

    We show that radiative feedback due to reionization has a pronounced effect on the extent of mechanical feedback due to galactic outflows. The photoionization of the Intergalactic Medium (IGM) suppresses low-mass galaxy formation by photoheating the gas and limiting atomic line cooling. The number of low-mass galaxies is central for the enrichment of the IGM as these objects have the capacity to enrich a significant fraction (by volume) of the Universe. We use a modified version of our galactic outflow model, combined with a simple criterion for suppression, to investigate the potential impact upon the IGM. We find that this suppression strongly reduces the enrichment of the IGM and is sensitive to the reionization history. We also investigate the contribution of halos of different masses with varying degrees of suppression.

  12. FFAG ACCELERATOR PROTON DRIVER FOR NEUTRINO FACTORY.

    SciTech Connect (OSTI)

    RUGGIERO, A.

    2005-06-21T23:59:59.000Z

    This paper is the summary of a conceptual study of a Proton Driver for Neutrino Factory based on the use of a Fixed-Field Alternating-Gradient (FFAG) Accelerator. The required proton energy range for an optimum neutrino production is 5 to 12 GeV. This can be accomplished with a group of three concentric rings each with 807 m circumference [1]. FFAG Accelerators [2] have the capability to accelerate charged particles over a large momentum range ({+-}30-50%) and the feature of constant bending and focusing fields. Particles can be accelerated very fast at the rate given by the accelerating field of RF cavities placed in proper locations between magnets. The performance of FFAG accelerators is to be placed between that of Super-Conducting Linear Accelerators (SCL), with which they share the fast acceleration rate, and Rapid-Cycling Synchrotrons (RCS), as they allow the beam to re-circulate over fewer revolutions. Brookhaven National Laboratory is involved in the study of feasibility of FFAG Accelerators to accelerate intense beams of protons in the GeV energy range for a variety of applications the most important of which is the Upgrade of the Alternating Gradient Synchrotron (AGS) with a new FFAG injector [3] accelerating from 400 MeV to 1.5 GeV. The ring would be housed in the AGS tunnel and has henceforth a circumference of 807 m.

  13. Threat assessment design for driver assistance system at intersections

    E-Print Network [OSTI]

    Aoude, Georges

    This paper considers the decision-making problem for a human-driven vehicle crossing a road intersection in the presence of other, potentially errant, drivers. Our approach relies on a novel threat assessment module, which ...

  14. active gate driver: Topics by E-print Network

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

    chip for SiC FET-driver chip is intended to drive SiC power FETs in DC-DC converters in a hybrid electric vehicle Tolbert, Leon M. 7 Current Balancing Control for Parallel...

  15. A Retroreflective Sheeting Selection Technique for Nighttime Drivers' Needs

    E-Print Network [OSTI]

    Paulus, Susan C.

    2010-07-14T23:59:59.000Z

    In this thesis, the author developed a retroreflective sheeting selection technique for traffic signs. Previous research was used to determine the luminance needed by drivers (demand luminance). The author used roadways scenarios to determine...

  16. Visual Attention and Driver Performance at Horizontal Curves

    E-Print Network [OSTI]

    Brimley, Bradford K.

    2014-12-02T23:59:59.000Z

    Despite the frequency with which drivers encounter curves on highways, curves are regularly identified as locations that experience disproportionately high crash rates. Crash data suggest that inattention is one of the leading causes of crashes...

  17. ambulance drivers: Topics by E-print Network

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

    Summary: BGD 9, 14437-14473, 2012 Soil carbon drivers and benchmarks in Earth system models K. E. O. Todd if available. Causes of variation in soil carbon predictions from...

  18. Your Role as a Jefferson Lab Fleet Vehicle Driver | Jefferson...

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

    Your Role as a Jefferson Lab Fleet Vehicle Driver Responsibility Number One - Safe Driving As a vehicle operator, it is up to you to drive safely and sensibly to avoid crashes. The...

  19. Science Drivers and Technical Challenges for Advanced Magnetic Resonance

    SciTech Connect (OSTI)

    Mueller, Karl T.; Pruski, Marek; Washton, Nancy M.; Lipton, Andrew S.

    2013-03-07T23:59:59.000Z

    This report recaps the "Science Drivers and Technical Challenges for Advanced Magnetic Resonance" workshop, held in late 2011. This exploratory workshop's goal was to discuss and address challenges for the next generation of magnetic resonance experimentation. During the workshop, participants from throughout the world outlined the science drivers and instrumentation demands for high-field dynamic nuclear polarization (DNP) and associated magnetic resonance techniques, discussed barriers to their advancement, and deliberated the path forward for significant and impactful advances in the field.

  20. Alternative highway sign alphabet styles for older drivers

    E-Print Network [OSTI]

    Tan, Carol Hannah

    1991-01-01T23:59:59.000Z

    ALTERNATIVE HIGHWAY SIGN ALPHABET STYLES FOR OLDER DRIVERS A Thesis by Carol Hannah Tan Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May... (Member) Jame T. . Yao (Head of partment) May 1991 ABSTRACT Alternative Highway Sign Alphabet Styles for Older Drivers. (May 1991) Carol Hannah Tan, B. S. , Texas A8 M University Chair of Advisory Committee: Dr. Daniel B. Farnbro In the United...

  1. Driver tension responses generated by various levels of intersection illumination

    E-Print Network [OSTI]

    Franklin, Weldon Clifford

    1962-01-01T23:59:59.000Z

    DRIVER TENSION RESPONSES GENERATED BY VARIOUS LEVELS OF INTERSECTION ILLUMINATION A Thesis By WELDON CLIFFORD FRANKLIN 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 1962 Major Subj ect: Civil Engineering DRIVER TENSION RESPONSES GENERATED BY VARIOUS LEVELS OF INTERSECTION ILLUMINATION A Thesis By WELDON CLIFFORD FRANKLIN Approved as to style and content by...

  2. Feedback reduction techniques and fairness in multi-user MIMO broadcast channels with random beamforming

    E-Print Network [OSTI]

    Pugh, Matthew Owen

    2011-01-01T23:59:59.000Z

    the Feedback . . . . . . . . . . . . . . . . . 2.72.5 MMSE Receivers and Feedback . . . . . . . . . . .1.2.1 Feedback Reduction Techniques Exploiting Spa- tial

  3. Radiative feedback from ionized gas

    E-Print Network [OSTI]

    S. C. O. Glover

    2007-03-28T23:59:59.000Z

    H2 formation in metal-free gas occurs via the intermediate H- or H2+ ions. Destruction of these ions by photodissociation therefore serves to suppress H2 formation. In this paper, I highlight the fact that several processes that occur in ionized primordial gas produce photons energetic enough to photodissociate H- or H2+ and outline how to compute the photodissociation rates produced by a particular distribution of ionized gas. I also show that there are circumstances of interest, such as during the growth of HII regions around the first stars, in which this previously overlooked form of radiative feedback is of considerable importance.

  4. Feedback enhanced plasma spray tool

    DOE Patents [OSTI]

    Gevelber, Michael Alan; Wroblewski, Donald Edward; Fincke, James Russell; Swank, William David; Haggard, Delon C.; Bewley, Randy Lee

    2005-11-22T23:59:59.000Z

    An improved automatic feedback control scheme enhances plasma spraying of powdered material through reduction of process variability and providing better ability to engineer coating structure. The present inventors discovered that controlling centroid position of the spatial distribution along with other output parameters, such as particle temperature, particle velocity, and molten mass flux rate, vastly increases control over the sprayed coating structure, including vertical and horizontal cracks, voids, and porosity. It also allows improved control over graded layers or compositionally varying layers of material, reduces variations, including variation in coating thickness, and allows increasing deposition rate. Various measurement and system control schemes are provided.

  5. Integrating User Feedback Log into Relevance Feedback by Coupled SVM for Content-Based Image Retrieval

    E-Print Network [OSTI]

    Lyu, Michael R.

    , the user feedback log is one of the most important resources to bridge the seman- tic gap problem in image to re- peat many rounds of feedback in order to achieve satisfac- tory results. Hence, the learning task

  6. Feedback Induced Death in Coupled Oscillators

    E-Print Network [OSTI]

    Ming Luo

    2011-11-10T23:59:59.000Z

    We investigate oscillation death in systems of coupled nonlinear oscillators with feedback loop. We find that feedback results in oscillation death both in small sets or large ensembles. More importantly, the death zone in parameter space is significantly enlarged and oscillation death could occur even in coupled identical oscillators in the presence of feedback. We find that there are two different ways to oscillation death, namely desynchronization and completely synchronization induced oscillation death. Feedback induced oscillation death may be used to suppress unexpected oscillations, e.g., in chaotic laser arrays.

  7. Feedback Cooling of a Single Neutral Atom

    E-Print Network [OSTI]

    Markus Koch; Christian Sames; Alexander Kubanek; Matthias Apel; Maximilian Balbach; Alexei Ourjoumtsev; Pepijn W. H. Pinkse; Gerhard Rempe

    2010-10-15T23:59:59.000Z

    We demonstrate feedback cooling of the motion of a single rubidium atom trapped in a high-finesse optical resonator to a temperature of about 160 \\mu K. Time-dependent transmission and intensity-correlation measurements prove the reduction of the atomic position uncertainty. The feedback increases the 1/e storage time into the one second regime, 30 times longer than without feedback. Feedback cooling therefore rivals state-of-the-art laser cooling, but with the advantages that it requires less optical access and exhibits less optical pumping.

  8. Feedbacks Between Hydrological Heterogeneity and Bioremediation

    E-Print Network [OSTI]

    Hubbard, Susan

    Feedbacks Between Hydrological Heterogeneity and Bioremediation Induced Biogeochemical, intensively studied over the last 20 years (4), has potential to further impact bioremediation efforts

  9. Information and Feedback Institutional Change Principle | Department...

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

    monthly energy feedback and staff monitors to reinforce communication and activity, which led to improved routine practices and significant energy savings. Driving Operational...

  10. External optical feedback in semiconductor lasers

    E-Print Network [OSTI]

    Mebrahtu, Philemon

    1990-01-01T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . . 15 17 18 18 20 10. Longitudinal mode spectra with and without mirror feedback . . . 22 11. Schematic diagram for the set up of fiber cavity feedback 12a. Picture of tapered PMSM fiber 12b. Set up used to align PMSM fiber 13. L - I plot... MIRROR FEEDBACK t I T' SOLITARY LASER DIODE 6. 25 dB/? + -50dB Fig 10. Longitudinal mode spectra with and without mirror feedback 23 B. Fiber Cavity A polarization-maintaining single-mode (PMSM) fiber 73. 8 cm long supplied by AT&T is used...

  11. II MODEL AND FEEDBACK LINEARIZING CONTROLLER 1 A Multilayer Perceptron Replaces a Feedback

    E-Print Network [OSTI]

    Amaral, José Nelson

    II MODEL AND FEEDBACK LINEARIZING CONTROLLER 1 A Multilayer Perceptron Replaces a Feedback Linearization Controller in a Nonlinear Servomechanism Jos'e F. Haffner, Ney T. Meyrer, Jos'e N. Amaral and Lu'is F. A. Pereira Abstract--- A Feedback Linearizing Controller (FLC) is used to train a multilayer

  12. Effect of downstream feedback on the achievable performance of feedback control loops for serial processes

    E-Print Network [OSTI]

    Duffy, Ken

    ]. For control design purposes, the common approach is to use linear models obtained around a certain operationEffect of downstream feedback on the achievable performance of feedback control loops for serial-- This paper deals with feedback control of serial processes, that is, processes formed by the series

  13. RF power recovery feedback circulator

    DOE Patents [OSTI]

    Sharamentov, Sergey I. (Bolingbrook, IL)

    2011-03-29T23:59:59.000Z

    A device and method for improving the efficiency of RF systems having a Reflective Load. In the preferred embodiment, Reflected Energy from a superconducting resonator of a particle accelerator is reintroduced to the resonator after the phase of the Reflected Energy is aligned with the phase of the Supply Energy from a RF Energy Source. In one embodiment, a Circulator is used to transfer Reflected Energy from the Reflective Load into a Phase Adjuster which aligns the phase of the Reflected Energy with that of the Supply Energy. The phase-aligned energy is then combined with the Supply Energy, and reintroduced into the Reflective Load. In systems having a constant phase shift, the Phase Adjuster may be designed to shift the phase of the Reflected Energy by a constant amount using a Phase Shifter. In systems having a variety (variable) phase shifts, a Phase Shifter controlled by a phase feedback loop comprising a Phase Detector and a Feedback Controller to account for the various phase shifts is preferable.

  14. Markovian feedback to control continuous variable entanglement

    E-Print Network [OSTI]

    Stefano Mancini

    2005-04-18T23:59:59.000Z

    We present a model to realize quantum feedback control of continuous variable entanglement. It consists of two interacting bosonic modes subject to amplitude damping and achieving entangled Gaussian steady state. The possibility to greatly improve the degree of entanglement by means of Markovian (direct) feedback is then shown.

  15. Feedback cooling of a single trapped ion

    E-Print Network [OSTI]

    Pavel Bushev; Daniel Rotter; Alex Wilson; Francois Dubin; Christoph Becher; Juergen Eschner; Rainer Blatt; Viktor Steixner; Peter Rabl; Peter Zoller

    2005-09-19T23:59:59.000Z

    Based on a real-time measurement of the motion of a single ion in a Paul trap, we demonstrate its electro-mechanical cooling below the Doppler limit by homodyne feedback control (cold damping). The feedback cooling results are well described by a model based on a quantum mechanical Master Equation.

  16. Optical feedback structures and methods of making

    DOE Patents [OSTI]

    Snee, Preston T; Chan, Yin Thai; Nocera, Daniel G; Bawendi, Moungi G

    2014-11-18T23:59:59.000Z

    An optical resonator can include an optical feedback structure disposed on a substrate, and a composite including a matrix including a chromophore. The composite disposed on the substrate and in optical communication with the optical feedback structure. The chromophore can be a semiconductor nanocrystal. The resonator can provide laser emission when excited.

  17. Feedback Controller Parameterizations for Reinforcement Learning

    E-Print Network [OSTI]

    Tedrake, Russ

    , such as Model Predictive Control [7] or the Linear Quadratic Regulator (LQR). More rarely, feedback policies, with learning performed using REINFORCE. While the manipulator is modeled as an open-loop stable linear systemFeedback Controller Parameterizations for Reinforcement Learning John W. Roberts CSAIL, MIT

  18. Nonlinearity of Carbon Cycle Feedbacks KIRSTEN ZICKFELD

    E-Print Network [OSTI]

    Schmittner, Andreas

    properties and anthropogenic CO2. These findings suggest that metrics of carbon cycle feedback that pos, human activities have emitted large amounts of carbon dioxide (CO2) into the atmosphere (490 PgC fromNonlinearity of Carbon Cycle Feedbacks KIRSTEN ZICKFELD Canadian Centre for Climate Modelling

  19. Linguistic constraints on compensation for altered auditory feedback

    E-Print Network [OSTI]

    Katseff, Shira Eden

    2010-01-01T23:59:59.000Z

    Response to 30 Hz /E/ F2 feedback shift. . . . . . . . . . .Response to /2/ F2 feedback shift. The x-axis marks theschematic of the State Feedback Control (SFC) model. From

  20. Feedback communication systems : fundamental limits and control-theoretic approach

    E-Print Network [OSTI]

    Ardestanizadeh, Ehsan

    2010-01-01T23:59:59.000Z

    2.2 Point-to-Point Channels with Feedback . . 2.2.1 GaussianChapter 3 Gaussian Multiple Access Channel with Feedback 3.1Channel with Feedback . . . . . . . . . . . . .4.1

  1. The Intelligent Combination of Input Shaping and PID Feedback Control

    E-Print Network [OSTI]

    Singhose, William

    The Intelligent Combination of Input Shaping and PID Feedback Control A Dissertation Presented Combination of Input Shaping and PID Feedback Control Approved by: Dr. William Singhose, Advisor School . . . . . . . . . . . . . . . . . . . . 8 1.4 PID Feedback Control . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.5 Comparison

  2. Employing feedback in adiabatic quantum dynamics

    E-Print Network [OSTI]

    Armen E. Allahverdyan; Guenter Mahler

    2008-04-10T23:59:59.000Z

    We study quantum adiabatic dynamics, where the slowly moving field is influenced by system's state (feedback). The information for the feedback is gained from non-disturbating measurements done on an ensemble of identical non-interacting systems. The situation without feedback is governed by the adiabatic theorem: adiabatic energy level populations stay constant, while the adiabatic eigenvectors get a specific phase contribution (Berry phase). However, under feedback the adiabatic theorem does not hold: the adiabatic populations satisfy a closed equation of motion that coincides with the replicator dynamics well-known by its applications in evolutionary game theory. The feedback generates a new gauge-invariant adiabatic phase, which is free of the constraints on the Berry phase (e.g., the new phase is non-zero even for real adiabatic eigenfunctions).

  3. Applications of Feedback Control in Quantum Systems

    E-Print Network [OSTI]

    Kurt Jacobs

    2006-05-02T23:59:59.000Z

    We give an introduction to feedback control in quantum systems, as well as an overview of the variety of applications which have been explored to date. This introductory review is aimed primarily at control theorists unfamiliar with quantum mechanics, but should also be useful to quantum physicists interested in applications of feedback control. We explain how feedback in quantum systems differs from that in traditional classical systems, and how in certain cases the results from modern optimal control theory can be applied directly to quantum systems. In addition to noise reduction and stabilization, an important application of feedback in quantum systems is adaptive measurement, and we discuss the various applications of adaptive measurements. We finish by describing specific examples of the application of feedback control to cooling and state-preparation in nano-electro-mechanical systems and single trapped atoms.

  4. UWB communication receiver feedback loop

    DOE Patents [OSTI]

    Spiridon, Alex (Palo Alto, CA); Benzel, Dave (Livermore, CA); Dowla, Farid U. (Castro Valley, CA); Nekoogar, Faranak (San Ramon, CA); Rosenbury, Erwin T. (Castro Valley, CA)

    2007-12-04T23:59:59.000Z

    A novel technique and structure that maximizes the extraction of information from reference pulses for UWB-TR receivers is introduced. The scheme efficiently processes an incoming signal to suppress different types of UWB as well as non-UWB interference prior to signal detection. Such a method and system adds a feedback loop mechanism to enhance the signal-to-noise ratio of reference pulses in a conventional TR receiver. Moreover, sampling the second order statistical function such as, for example, the autocorrelation function (ACF) of the received signal and matching it to the ACF samples of the original pulses for each transmitted bit provides a more robust UWB communications method and system in the presence of channel distortions.

  5. Multimedia Feedback Systems for Engineering

    SciTech Connect (OSTI)

    Gladwell, S.; Gottlieb, E.J.; McDonald, M.J.; Slutter, C.L.

    1998-12-15T23:59:59.000Z

    The World Wide Web has become a key tool for information sharing. Engineers and scientists are finding that the web is especially suited to publishing the graphical, multi-layered information that is typical of their work. Web pages are easier to distribute than hardcopy. Web movies have become more accessible, in many offices, than videos. Good VRML viewing software, bundled with most new PCs, has sufficient power to support many engineering needs. In addition to publishing information science and engineering has an important tradition of peer and customer review. Reports, drawings and graphs are typically printed, distributed, reviewed, marked up, and returned to the author. Adding review comments to paper is easy. When, however, the information is in electronic form, this ease of review goes away. It's hard to write on videos. It's even harder to write comments on animated 3D models. These feedback limitations reduce the value of the information overall. Fortunately, the web can also be a useful tool for collecting peer and customer review information. When properly formed, web reports, movies, and 3D animations can be readily linked to review notes. This paper describes three multimedia feed-back systems that Sandia National Laboratories has developed to tap that potential. Each system allows people to make context-sensitive comments about specific web content and electronically ties the comments back to the web content being referenced. The fuel system ties comments to specific web pages, the second system ties the comments to specific frames of digital movies, and the third ties the comments to specific times and viewpoints within 3D animations. In addition to the technologies, this paper describes how they are being used to support intelligent machine systems design at Sandia.

  6. EC Driver - 41" Stroke Hydraulic Cylinder

    SciTech Connect (OSTI)

    Jaques, A.; /Fermilab

    1990-05-24T23:59:59.000Z

    It was decided to use a hydraulic cylinder resting on the floor of the argon spill trough in the EC carriage to drive the EC's motion on the center beam. Space was limited due to the spill bellows and their required support and containment system. The 0.0. of the cylinder had to be limited to 3 to 3-1/2 inches, maximum. The weight of a wet EC and carriage is estimated to be 320 tons. The rolling coefficient of friction of the Tychoway rollers chosen to guide the EC and carriage along the hardened centerbeam ways is claimed to be less than 0.0025. The driver will also need to overcome the forces produced by moving (rotating) the numerous bayonets located at the top of the cryostats in the many piping systems. These forces were conservatively estimated at 1000 lbs. The drive force required to overcome these forces was then calculated to be: 320(2,000) x 0.0025 + 1,000 = 2.600 lbs. (min. required). Due to the uncertainty in the actual roller coefficient of friction and the various unknowns in estimating the resistive forces contained in the piping and cabling systems attached to the cryostat, a conservative design factor of 5 was chosen. This should account for any uncertainty in our estimation of the minimum required drive force and also leaves us with a reserve to fall back on in case any unforeseen problems might arise. Thus the desired capacity of the driver was set at: (2,600) x 5 = 13,000 lbs. (design capacity). Assuming a 3 inch O.D. cylinder with a 1/2 inch wall (2 inch bore), we first analyzed a 1-3/8 inch diameter piston rod. Using Shigley & Mischke's 'Mechanical Engineering Design' (5th Ed.) and it's formulas for long columns with central loading, it was determined that a 1-3/8 inch diameter rod would not suffice, given our safety factor of 2. Increasing the piston rod diameter to 1-1/2 inches proved to be sufficient. The maximum allowable load came out to be approximately 17,000 lbs., which is greater than the 13,000 lbs. design capacity. With a 1-1/2 inch rod, a 2 inch bore and 10,000 psi capacity, the maximum return (retraction) force is: ({pi}/4)(2{sup 2}-1.52) x (10,000) = 13,744 lbs. (return force). This meets the desired design capacity of the cylinder. On the extension of the cylinder, the pressure will be limited such to produce only the 13,000 lb. design capacity. Through the use of a regulator on the cylinder extension inlet, the pressure will be limited to: 13,000/[({pi}/4)(2){sup 2}] {approx_equal} 4,200 psi. (regulator setting) and 4,200 x ({pi}/4)(2){sup 2} = 13,195 lbs. (thrust force). Another reference used by some Fermi engineers in designing hydraulic cylinders is the 'Design Engineers Handbook', Bulletin 0224-B1 published by the Parker-Hannifin Corporation. The piston rod-stroke selection table on page b-5 is used to determine the stroke factor. Our setup most approximates Case II of the table which gives a stroke factor of 0.70. Multiplying this by the actual stroke (41-inch) gives us a basic length of 28.7-inch. Using the piston rodstroke selection graph on page b-6, the 1-1/2 inch rod and 28.7-inch basic length indicate an allowable thrust of approximately 13,000 lbs. According to the Chief Application Engineer at the Parker-Hannifin regional sales office in Des Plaines, IL, a min imum safety factor of 4 can be assumed in the piston rod-stroke selection graph, possibly even higher. This would be at least twice as high as our initial safety factor of 2. Thus we feel our cylinder design falls well within the acceptable region of this reference.

  7. Getting Useful Real-Time Feedback About Your Program | Department...

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

    Getting Useful Real-Time Feedback About Your Program Getting Useful Real-Time Feedback About Your Program Better Buildings Webinar - May 25, 2011 20110525realtimefeedback.pdf...

  8. Contractor Rating and Feedback Systems | Department of Energy

    Energy Savers [EERE]

    Contractor Rating and Feedback Systems Contractor Rating and Feedback Systems Better Buildings Residential Workforce Business Partners Peer Exchange Call Series: Contractor Rating...

  9. Energy Department Seeks Feedback on Draft Guidance for the Hydroelectr...

    Energy Savers [EERE]

    Feedback on Draft Guidance for the Hydroelectric Production Incentive Program Energy Department Seeks Feedback on Draft Guidance for the Hydroelectric Production Incentive Program...

  10. Plans for a proton driver at Fermilab

    SciTech Connect (OSTI)

    Kephart, R.D.; /Fermilab

    2005-01-01T23:59:59.000Z

    During the last several years, stunning experimental results have established that neutrinos have nonzero masses and substantial mixing. The Standard Model must be extended to accommodate neutrino mass terms. The observation that neutrino masses and mass splittings are all many orders of magnitude smaller than those of any of the other fundamental fermions suggests radically new physics, perhaps originating at the GUT or Planck Scale, or perhaps the existence of new spatial dimensions. In some sense we know that the Standard Model is broken, but we don't know how it is broken. Whatever the origin of the observed neutrino masses and mixing, it is likely to require a profound extension to our picture of the physical world. The first steps in understanding this revolutionary new physics are to pin down the measurable parameters and to address the next round of basic questions: (1) Are there only three neutrino flavors, or do light, sterile neutrinos exist? (2) If there are only three generations, there is one angle ({theta}{sub 13}) in the mixing matrix that is unmeasured. How large is it? (3) Which of the two possible orderings of the neutrino mass eigenstates applies? (4) If {theta}{sub 13} is large enough one it may be possible to measure the quantum-mechanical phase {delta}. If {theta}{sub 13} and {delta} are non-zero there will be CP violation in the lepton sector. These questions can be addressed by accelerator based neutrino oscillation experiments. The answers will guide our understanding of what lies beyond the Standard Model, and whether the new physics provides an explanation for the baryon asymmetry of the Universe (via leptogenesis), or provides deep insight into the connection between quark and lepton properties (via Grand Unified Theories), or perhaps leads to an understanding of one of the most profound questions in physics: Why are there three generations of quarks and leptons? The answers may well further challenge our picture of the physical world, and will certainly have important implications for our understanding of cosmology and the evolution of the early Universe. The current Fermilab Program is an important part of the world-wide accelerator based effort to explore and understand the physics of neutrino oscillations. By early 2005, with both MINOS and MiniBooNE taking data, Fermilab will be able to answer some of the most pressing first-round questions raised by the discovery that neutrinos have mass. Fermilab's high-intensity neutrino beams are derived from 8- and 120-GeV proton beams. MiniBooNE is currently taking data using 8 GeV Protons from the Booster. The 120 GeV NuMI beam will start to operate in early 2005 using a 0.25 MW proton beam power from the Main Injector. Future neutrino programs will build on these existing facilities. New short and long baseline experiments have been proposed. There are proposals to increase the available number of protons at 8 and 120 GeV with the goal of addressing the full range of questions presented by neutrino oscillations. Key to that vision is a new intense proton source that usually is referred to as the Proton Driver.

  11. BEAM SIMULATIONS USING VIRTUAL DIAGNOSTICS FOR THE DRIVER LINAC

    SciTech Connect (OSTI)

    R. C. York; X. Wu; Q. Zhao

    2011-12-21T23:59:59.000Z

    End-to-end beam simulations for the driver linac have shown that the design meets the necessary performance requirements including having adequate transverse and longitudinal acceptances. However, to achieve reliable operational performance, the development of appropriate beam diagnostic systems and control room procedures are crucial. With limited R&D funding, beam simulations provide a cost effective tool to evaluate candidate beam diagnostic systems and to provide a critical basis for developing early commissioning and later operational activities. We propose to perform beam dynamic studies and engineering analyses to define the requisite diagnostic systems of the driver linac and through simulation to develop and test commissioning and operational procedures.

  12. Controlling entanglement by direct quantum feedback

    E-Print Network [OSTI]

    A. R. R. Carvalho; A. J. S. Reid; J. J. Hope

    2008-07-07T23:59:59.000Z

    We discuss the generation of entanglement between electronic states of two atoms in a cavity using direct quantum feedback schemes. We compare the effects of different control Hamiltonians and detection processes in the performance of entanglement production and show that the quantum-jump-based feedback proposed by us in Phys. Rev. A {\\bf 76} 010301(R) (2007) can protect highly entangled states against decoherence. We provide analytical results that explain the robustness of jump feedback, and also analyse the perspectives of experimental implementation by scrutinising the effects of imperfections and approximations in our model.

  13. Comparative Oncogenomic Analysis of Copy Number Alterations in Human and Zebrafish Tumors Enables Cancer Driver Discovery

    E-Print Network [OSTI]

    Zhang, GuangJun

    The identification of cancer drivers is a major goal of current cancer research. Finding driver genes within large chromosomal events is especially challenging because such alterations encompass many genes. Previously, we ...

  14. Driver mental workload requirements on horizontal curves based on occluded vision test measurements

    E-Print Network [OSTI]

    Shafer, Mark Anthony

    1994-01-01T23:59:59.000Z

    This thesis documents an evaluation of driver mental workload requirements on horizontal curves based on occluded vision test measurements. Driver workload is an important concept in the design of highway systems. A successful highway design...

  15. 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...

  16. Evaluation of driver braking performance to an unexpected object in the roadway 

    E-Print Network [OSTI]

    Picha, Dale Louis

    1994-01-01T23:59:59.000Z

    components, specifically whether the equation accurately reflects driver and vehicle behaviors during a braking maneuver. This research evaluated the two components of the SSD equation. Four field studies were conducted that evaluated driver braking...

  17. Evaluation of driver braking performance to an unexpected object in the roadway

    E-Print Network [OSTI]

    Picha, Dale Louis

    1994-01-01T23:59:59.000Z

    components, specifically whether the equation accurately reflects driver and vehicle behaviors during a braking maneuver. This research evaluated the two components of the SSD equation. Four field studies were conducted that evaluated driver braking...

  18. Feedback Capacity of the Compound Channel

    E-Print Network [OSTI]

    Shrader, Brooke E.

    In this work, we find the capacity of a compound finite-state channel (FSC) with time-invariant deterministic feedback. We consider the use of fixed length block codes over the compound channel. Our achievability result ...

  19. Cirrus feedback on interannual climate fluctuations

    SciTech Connect (OSTI)

    Zhou, C. [Lawrence Livermore National Laboratory, Livermore, CA (United States). Program for Climate Model Diagnosis and Intercomparison; Dessler, A. E. [Texas A& M Univ., College Station TX (United States). Department of Atmospheric Sciences; Zelinka, M. D. [Lawrence Livermore National Laboratory, Livermore, CA (United States). Program for Climate Model Diagnosis and Intercomparison; Yang, P. [Texas A& M Univ., College Station TX (United States). Department of Atmospheric Sciences; Wang, T. [Jet Propulsion Lab./Caltech, Pasadena, CA (United States)] (ORCID:0000000334308508)

    2014-12-28T23:59:59.000Z

    Cirrus clouds are not only important in determining the current climate, but also play an important role in climate change and variability. Analysis of satellite observations shows that the amount and altitude of cirrus clouds (optical depth <3.6, cloud top pressure <440 hPa) increase in response to inter-annual surface warming. Thus, cirrus clouds are likely to act as a positive feedback on short-term climate fluctuations, by reducing the planet’s ability to radiate longwave radiation to space in response to planetary surface warming. Using cirrus cloud radiative kernels, the magnitude of cirrus feedback is estimated to be 0.20±0.21W/m2/°C, which is comparable to the surface albedo feedback. Most of the cirrus feedback comes from increasing cloud amount in the tropical tropopause layer (TTL) and subtropical upper troposphere.

  20. Feedback controller parameterizations for reinforcement learning

    E-Print Network [OSTI]

    Roberts, John William

    Reinforcement Learning offers a very general framework for learning controllers, but its effectiveness is closely tied to the controller parameterization used. Especially when learning feedback controllers for weakly stable ...

  1. POLE PLACEMENT BY STATIC OUTPUT FEEDBACK FOR ...

    E-Print Network [OSTI]

    SIAM (#1) 1035 2001 Apr 10 12:32:38

    2002-06-04T23:59:59.000Z

    topology) subset U of such systems, where the real pole placement map is not surjective. It follows that, for ... Key words. linear systems, static output control feedback, pole placement. AMS subject .... is an integral power of 2. In the opposite ...

  2. Termites, elephants and fire are key drivers of tree mortality

    E-Print Network [OSTI]

    mortality: 2 dominated by elephant damage, 2 by termite attack and 1 by fire. Wind and human activity wereTermites, elephants and fire are key drivers of tree mortality 5 plots suffered substantial tree not major causes of tree mortality. Sample sizes are too small to reasonably determine the most significant

  3. Next Story > SC DMV lifting drivers' suspensions this week

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    The State Next Story > SC DMV lifting drivers' suspensions this week Researcher: Zombie fads peak COLUMBIA, S.C. -- Zombies seem to be everywhere these days. In the popular TV series "The Walking Dead at the University of California at Davis. Lauro said she keeps track of zombie movies, TV shows and video games

  4. Energy for 500 million Homes: Drivers and Outlook for

    E-Print Network [OSTI]

    -up analysis of residential building energy consumption in China using data from a wide variety of sourcesLBNL-2417E Energy for 500 million Homes: Drivers and Outlook for Residential Energy Consumption and Outlook for Residential Energy Consumption in China Nan Zhou*, Michael A. McNeil, Mark Levine Keywords

  5. Project: Driver and controller for a thermoelectric cooler

    E-Print Network [OSTI]

    Project: Driver and controller for a thermoelectric cooler Supervisor: Prof. Sam Ben-Yaakov Year solutions. Based on one of the three thermoelectric phenomena ­ the Peltier effect ­ bi-directional control is achieved. The TEC (which is a Thermoelectric Cooler) uses this effect. The direction of the current through

  6. Integrating Concurrency Control and Energy Management in Device Drivers

    E-Print Network [OSTI]

    Levis, Philip

    Integrating Concurrency Control and Energy Management in Device Drivers Kevin Klues , Vlado@cs.berkeley.edu dgay@intel-research.net Abstract Energy management is a critical concern in wireless sensornets. De- spite its importance, sensor network operating systems today pro- vide minimal energy management support

  7. Improved gauge driver for the generalized harmonic Einstein system Lee Lindblom and Bela Szilagyi

    E-Print Network [OSTI]

    Lindblom, Lee

    Improved gauge driver for the generalized harmonic Einstein system Lee Lindblom and Be´la Szila´gyi

  8. Feedback-controlled adiabatic quantum computation

    E-Print Network [OSTI]

    R. D. Wilson; A. M. Zagoskin; S. Savel'ev; M. J. Everitt; Franco Nori

    2013-01-03T23:59:59.000Z

    We propose a simple feedback-control scheme for adiabatic quantum computation with superconducting flux qubits. The proposed method makes use of existing on-chip hardware to monitor the ground-state curvature, which is then used to control the computation speed to maximize the success probability. We show that this scheme can provide a polynomial speed-up in performance and that it is possible to choose a suitable set of feedback-control parameters for an arbitrary problem Hamiltonian.

  9. A method for calibration of bone driver transducers to measure the mastoid impedance Reggie Weecea

    E-Print Network [OSTI]

    Allen, Jont

    bone vibrator transducers for clinical measurements, the transfer of energy from the bone driver by known masses. This absolute calibration is based upon a circuit model of the driver, describing specialized equipment not available in the clinic, and a refined bone driver circuit model is proposed

  10. Research Paper A method for calibration of bone driver transducers to measure the mastoid

    E-Print Network [OSTI]

    Allen, Jont

    vibrator transducers for clinical measurements, the transfer of energy from the bone driver depends. This absolute calibration is based upon a circuit model of the driver, describing it with three frequency in the clinic, and a refined bone driver circuit model is proposed to better capture the observed behaviors. Ã?

  11. Testing Closed-Source Binary Device Drivers with DDT Volodymyr Kuznetsov, Vitaly Chipounov, and George Candea

    E-Print Network [OSTI]

    Candea, George

    Testing Closed-Source Binary Device Drivers with DDT Volodymyr Kuznetsov, Vitaly Chipounov (EPFL), Switzerland Abstract DDT is a system for testing closed-source binary de- vice drivers against think of it as a pesticide against device driver bugs. DDT combines virtualization with a spe- cialized

  12. Design and Evaluation of a Safe Driver Machine Interface ANDREA BONDAVALLI5

    E-Print Network [OSTI]

    Firenze, Università degli Studi di

    Computer (EVC) and the Driver Machine Interface (DMI). The EVC is the core of the on- board ATC system; it supervises the movement of the train by using the information re- ceived from the trackside systems. The DMI is the interface between the EVC and the driver; it acquires driver's commands and transforms EVC commands

  13. Journal of Transportation Engineering Modelling Automobile Driver's Toll-Lane Choice Behaviour at a Toll Plaza

    E-Print Network [OSTI]

    Kundu, Debasis

    Journal of Transportation Engineering Modelling Automobile Driver's Toll-Lane Choice Behaviour at a Toll Plaza --Manuscript Draft-- Manuscript Number: TEENG-1181R3 Full Title: Modelling Automobile Driver to develop a random utility based discrete multinomial choice model for the behaviour of automobile drivers

  14. ACTIVE GALACTIC NUCLEUS FEEDBACK WORKS BOTH WAYS

    SciTech Connect (OSTI)

    Zinn, P.-C.; Middelberg, E.; Dettmar, R.-J. [Astronomical Institute of Ruhr-University Bochum, Universitaetsstrasse 150, D-44801 Bochum (Germany); Norris, R. P. [CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710 (Australia)

    2013-09-01T23:59:59.000Z

    Simulations of galaxy growth need to invoke strong negative feedback from active galactic nuclei (AGNs) to suppress the formation of stars and thus prevent the over-production of very massive systems. While some observations provide evidence for such negative feedback, other studies find either no feedback or even positive feedback, with increased star formation associated with higher AGN luminosities. Here we report an analysis of several hundred AGNs and their host galaxies in the Chandra Deep Field South using X-ray and radio data for sample selection. Combined with archival far-infrared data as a reliable tracer of star formation activity in the AGN host galaxies, we find that AGNs with pronounced radio jets exhibit a much higher star formation rate (SFR) than the purely X-ray-selected ones, even at the same X-ray luminosities. This difference implies that positive AGN feedback plays an important role, too, and therefore has to be accounted for in all future simulation work. We interpret this to indicate that the enhanced SFR of radio-selected AGNs arises because of jet-induced star formation, as is suggested by the different jet powers among our AGN samples, while the suppressed SFR of X-ray selected AGN is caused by heating and photo-dissociation of molecular gas by the hot AGN accretion disk.

  15. Low-jitter, hydrogen thyratron Pockels cell driver

    SciTech Connect (OSTI)

    Oicles, J.A.; Kitchin, H.D.

    1983-06-01T23:59:59.000Z

    The requirements to be met by Pockels cell drivers for incorporation into the Novette and Nova Laser systems are presented, and critical aspects of the specification examined. A high-performance pulse generator has been developed to meet these requirements using new thyratron technology from the English Electric Valve Co. Ltd. Two closely related versions have been built; a 10KV output unit with 9 nsec risetime into five parallel 50-ohm loads and a faster 5KV output driver with 3.5 nsec risetime into a single 50-ohm load. The design approach for optimizing performance, using the new tubes in relation to the LLNL specification is described, including the techniques used for control of electromagnetic interference.

  16. Simple SPICE model for comparison of CMOS output driver circuits

    E-Print Network [OSTI]

    Hermann, John Karl

    1993-01-01T23:59:59.000Z

    to monitor the ground nodes of output driver circuits for noise. Both relative performance and noise levels are generated through the simulations. A test device was built to confirm that the model was effective in speed and noise comparisons. Values were... on CMOS technologies. Journal model is IEEE 'I?ansactions on Automatic Control. A. Literature Survey Research has been done in the past concerning noise generated by digital logic de- vices. In particular, Advanced CMOS Logic (ACL) integrated circuits...

  17. 59136 Federal Register / Vol. 75, No. 186 / Monday, September 27, 2010 / Rules and Regulations (c) Certain farm vehicle drivers. The

    E-Print Network [OSTI]

    ) Certain farm vehicle drivers. The rules in this part except for § 391.15(e) do not apply to a farm vehicle driver except a farm vehicle driver who drives an articulated (combination) commercial motor vehicle, as defined in § 390.5. For limited exemptions for farm vehicle drivers of articulated commercial motor

  18. Stellar Feedback in Dwarf Galaxy Formation

    E-Print Network [OSTI]

    Sergey Mashchenko; James Wadsley; H. M. P. Couchman

    2007-11-29T23:59:59.000Z

    Dwarf galaxies pose significant challenges for cosmological models. In particular, current models predict a dark matter density that is divergent at the center, in sharp contrast with observations which indicate an approximately constant central density core. Energy feedback, from supernova explosions and stellar winds, has been proposed as a major factor shaping the evolution of dwarf galaxies. We present detailed cosmological simulations with sufficient resolution both to model the relevant physical processes and to directly assess the impact of stellar feedback on observable properties of dwarf galaxies. We show that feedback drives large-scale, bulk motion of the interstellar gas resulting in significant gravitational potential fluctuations and a consequent reduction in the central matter density, bringing the theoretical predictions in agreement with observations.

  19. Reconsidering Rapid Qubit Purification by Feedback

    E-Print Network [OSTI]

    H. M. Wiseman; J. F. Ralph

    2006-05-13T23:59:59.000Z

    This paper reconsiders the claimed rapidity of a scheme for the purification of the quantum state of a qubit, proposed recently in Jacobs 2003 Phys. Rev. A67 030301(R). The qubit starts in a completely mixed state, and information is obtained by a continuous measurement. Jacobs' rapid purification protocol uses Hamiltonian feedback control to maximise the average purity of the qubit for a given time, with a factor of two increase in the purification rate over the no-feedback protocol. However, by re-examining the latter approach, we show that it mininises the average time taken for a qubit to reach a given purity. In fact, the average time taken for the no-feedback protocol beats that for Jacobs' protocol by a factor of two. We discuss how this is compatible with Jacobs' result, and the usefulness of the different approaches.

  20. AGN feedback using AMR cosmological simulations

    E-Print Network [OSTI]

    Dubois, Yohan; Slyz, Adrianne; Teyssier, Romain

    2011-01-01T23:59:59.000Z

    Feedback processes are thought to solve some of the long-standing issues of the numerical modelling of galaxy formation: over-cooling, low angular momentum, massive blue galaxies, extra-galactic enrichment, etc. The accretion of gas onto super-massive black holes in the centre of massive galaxies can release tremendous amounts of energy to the surrounding medium. We show, with cosmological Adaptive Mesh Refinement simulations, how the growth of black holes is regulated by the feedback from Active Galactic Nuclei using a new dual jet/heating mechanism. We discuss how this large amount of feedback is able to modify the cold baryon content of galaxies, and perturb the properties of the hot plasma in their vicinity.

  1. Time-delayed quantum feedback control

    E-Print Network [OSTI]

    Arne L. Grimsmo

    2015-02-24T23:59:59.000Z

    A theory of time-delayed coherent quantum feedback is developed. More specifically, we consider a quantum system coupled to a bosonic reservoir creating a unidirectional feedback loop. It is shown that the dynamics can be mapped onto a fictitious quantum cascade, where the system is driven by past versions of itself. The derivation of this model relies on a tensor network representation of the system-reservoir time-propagator. For concreteness, this general theory is applied to a driven two-level atom scattering into a coherent feedback loop. We demonstrate how delay effects can qualitatively change the dynamics of the atom, and how quantum control can be implemented in the presence of time-delays. A realization with a superconducting qubit serving as an artificial atom is discussed.

  2. Feedback improves the generalized degrees of freedom of the strong interference channel

    E-Print Network [OSTI]

    Cadambe, Viveck R; Jafar, Syed A

    2008-01-01T23:59:59.000Z

    the mimo interference channel with feedback,” 2008. Preprintthe impact of relays, feedback, co- operation and full-Feedback improves the generalized degrees of freedom of the

  3. Stabilizing feedback controls for quantum systems

    E-Print Network [OSTI]

    Mazyar Mirrahimi; Ramon van Handel

    2005-11-10T23:59:59.000Z

    No quantum measurement can give full information on the state of a quantum system; hence any quantum feedback control problem is neccessarily one with partial observations, and can generally be converted into a completely observed control problem for an appropriate quantum filter as in classical stochastic control theory. Here we study the properties of controlled quantum filtering equations as classical stochastic differential equations. We then develop methods, using a combination of geometric control and classical probabilistic techniques, for global feedback stabilization of a class of quantum filters around a particular eigenstate of the measurement operator.

  4. Efficient Quantum Filtering for Quantum Feedback Control

    E-Print Network [OSTI]

    Pierre Rouchon; Jason F. Ralph

    2015-01-06T23:59:59.000Z

    We discuss an efficient numerical scheme for the recursive filtering of diffusive quantum stochastic master equations. We show that the resultant quantum trajectory is robust and may be used for feedback based on inefficient measurements. The proposed numerical scheme is amenable to approximation, which can be used to further reduce the computational burden associated with calculating quantum trajectories and may allow real-time quantum filtering. We provide a two-qubit example where feedback control of entanglement may be within the scope of current experimental systems.

  5. Enhancement of Field Squeezing Using Coherent Feedback

    E-Print Network [OSTI]

    J. E. Gough; S. Wildfeuer

    2009-08-22T23:59:59.000Z

    The theory of quantum feedback networks has recently been developed with the aim of showing how quantum input-output components may be connected together so as to control, stabilize or enhance the performance of one of the subcomponents. In this paper we show how the degree to which an idealized component (a degenerate parametric amplifier in the strong-coupling regime) can squeeze input fields may be enhanced by placing the component in-loop in a simple feedback mechanism involving a beam splitter. We study the spectral properties of output fields, placing particular emphasis on the elastic and inelastic components of the power density.

  6. ALSHub: Submit Proposals and Give Us Your Feedback!

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

    ALSHub: Submit Proposals and Give Us Your Feedback ALSHub: Submit Proposals and Give Us Your Feedback Print The ALS User Office rolled out ALSHub, a new user portal, five months...

  7. Transmit beamforming for multiple antenna systems with imperfect feedback

    E-Print Network [OSTI]

    Isukapalli, Yogananda R.

    2009-01-01T23:59:59.000Z

    a transmit beamforming MISO system with imperfect feedback.error proba- bility of a MISO transmit beamforming system,”of finite rate feedback MISO systems in the presence of es-

  8. Feedback control of flow separation using synthetic jets

    E-Print Network [OSTI]

    Kim, Kihwan

    2006-04-12T23:59:59.000Z

    The primary goal of this research is to assess the effect of synthetic jets on flow separation and provide a feedback control strategy for flow separation using synthetic jets. The feedback control synthesis is conducted based upon CFD simulation...

  9. Evolutionary Optimization of Feedback Controllers for Thermoacoustic Instabilities

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Evolutionary Optimization of Feedback Controllers for Thermoacoustic Instabilities Nikolaus Hansen prone to thermoacoustic instabilities which arise due to a feedback loop involving fluctua- tions in acoustic pressure, velocity and heat release. Thermoacoustic instabilities may cause mechanical damage

  10. Feedback from Clustered Sources During Reionization

    E-Print Network [OSTI]

    Roban Hultman Kramer; Zoltan Haiman; S. Peng Oh

    2006-04-10T23:59:59.000Z

    The reionization history of the intergalactic medium (IGM) at high redshift (z > 6) was likely strongly shaped by several global feedback processes. Because the earliest ionizing sources formed at the locations of the rare density peaks, their spatial distribution was strongly clustered. Here we demonstrate that this clustering significantly boosts the impact of feedback processes operating at high redshift. We build a semi-analytical model to include feedback and clustering simultaneously, and apply this model to the suppression of star-formation in minihalos due to photoionization. The model is built on the excursion-set-based formalism of Furlanetto, Zaldarriaga and Hernquist (2004), which incorporates the clustering of ionizing sources, and which we here extend to include suppression of star formation in minihalos. We find that clustering increases the mean HII bubble size by a factor of several, and it dramatically increases the fraction of minihalos that are suppressed, by a factor of up to 60 relative to a randomly distributed population. This enhanced suppression can significantly reduce the electron scattering optical depth, as required by the three-year data from the Wilkinson Microwave Anisotropy Probe (WMAP). We argue that source clustering is likely to similarly boost the importance of a variety of other feedback mechanisms.

  11. Detectable Signatures of Cosmic Radiative Feedback

    E-Print Network [OSTI]

    R. Schneider; R. Salvaterra; T. Roy Choudhury; A. Ferrara; C. Burigana; L. A. Popa

    2007-12-04T23:59:59.000Z

    We use a semi-analytical model to study the impact of reionization, and the associated radiative feedback, on galaxy formation. Two feedback models have been considered: (i) a standard prescription, according to which star formation is totally suppressed in galaxies with circular velocity below a critical threshold (model CF06) and (ii) a characterization based on the filtering scale (model G00), allowing for a gradual reduction of the gas available for star formation in low-mass galaxies. In model CF06 reionization starts at z ~ 15-20, is 85% complete by z ~ 10; at the same z, the ionized fraction is 16% in model G00. The models match SDSS constraints on the evolution of the neutral hydrogen fraction at z feedback models. Deviations among radiative feedback prescriptions emerge when considering the expected HI 21 cm background signal, where a ~ 15 mK absorption feature in the range 75-100 MHz is present in model G00 and a global shift of the emission feature preceding reionization towards larger frequencies occurs in the same model. Single dish observations with existing or forthcoming low-frequency radio telescopes can achieve mK sensitivity, allowing the identification of these features provided that foregrounds can be accurately subtracted.

  12. Opportunity for feedback Opportunity for updates

    E-Print Network [OSTI]

    Opportunity for feedback Opportunity for updates Opportunity to find out all of the things I don) What do these all mean? Vision (1) Values (5-10) Strategic Priorities (5-7) Education, scholarship update Research Plan Pinnacles or not? Focus on impact Update every 3 yrs Capital Plan Existing

  13. Lyapunov Functions and Feedback in Nonlinear Control

    E-Print Network [OSTI]

    Maume-Deschamps, Véronique

    Lyapunov Functions and Feedback in Nonlinear Control Francis Clarke Professeur `a l@igd.univ-lyon1.fr Summary. The method of Lyapunov functions plays a central role in the study to consider nonsmooth Lyapunov functions, even if the underlying control dynamics are themselves smooth. We

  14. Combining Channel Output Feedback and CSI Feedback for MIMO Wireless Systems

    E-Print Network [OSTI]

    Agrawal, Mayur; Balakrishnan, Venkataramanan

    2010-01-01T23:59:59.000Z

    The use of channel output feedback to improve the reliability of fading channels has received scant attention in the literature. In most work on feedback for fading channels, only channel state information (CSI) feedback has been exploited for coding at the transmitter. In this work, the design of a coding scheme for multiple-input multiple-output (MIMO) fading systems with channel output and channel state feedback at the transmitter is considered. Under the assumption of additive white Gaussian noise and an independent and identically distributed fading process, a simple linear coding strategy that achieves any rate up to capacity is proposed. The framework assumes perfect CSI at the transmitter and receiver. This simple linear processing scheme can provide a doubly exponential probability of error decay with blocklength for all rates less than capacity. Remarkably, this encoding scheme actually consists of two separate encoding blocks: one that adapts to the current CSI and one that adapts to the previous c...

  15. Investigating a model of optimised AGN feedback

    E-Print Network [OSTI]

    Edward C. D. Pope

    2011-03-02T23:59:59.000Z

    Feedback heating from AGN in massive galaxies and galaxy clusters can be thought of as a naturally occurring control system which plays a significant role in regulating both star formation rates and the X-ray luminosity of the surrounding hot gas. In the simplest case, negative feedback can be viewed as a system response that is `optimised' to minimise deviations from equilibrium, such that the system rapidly evolves towards a steady state. However, a general solution of this form appears to be incompatible with radio observations which indicate intermittent AGN outbursts. Here, we explore an energetically favourable scenario in which feedback is required to both balance X-ray gas cooling, and minimise the sum of the energy radiated by the gas and the energy injected by the AGN. This specification is equivalent to ensuring that AGN heating balances the X-ray gas cooling with minimum black hole growth. It is shown that minimum energy heating occurs in discrete events, and not at a continuous, constant level. Furthermore, systems with stronger feedback experience proportionally more powerful heating events, but correspondingly smaller duty cycles. Interpreting observations from this perspective would imply that stronger feedback occurs in less massive objects - elliptical galaxies, rather than galaxy clusters. One direct consequence of this effect would be that AGN heating events are sufficiently powerful to expel hot gas from the gravitational potential of a galaxy, but not a galaxy cluster, which is consistent with theoretical explanations for the steepening of the L_X-T relation at temperatures below 1-2 keV.

  16. Transverse Feedback in a 100 TeV Storage Ring

    E-Print Network [OSTI]

    Lambertson, G.

    2011-01-01T23:59:59.000Z

    Proceedings Transverse Feedback in a 100 TeV Storage Ring G.DE93 001571 TRANSVERSE FEEDBACK IN A 100 TeV STORAGE RING*IS UNLIMITED r-t_9. TRANSVERSE FEEDBACK IN A 100 TeV STORAGE

  17. Optimizing Feedback in Energy Harvesting MISO Communication Channels

    E-Print Network [OSTI]

    Gesbert, David

    Optimizing Feedback in Energy Harvesting MISO Communication Channels Rajeev Gangula1 , David.gunduz@imperial.ac.uk Abstract--In this work,1 we consider the optimization of feedback in a point-to-point MISO channel in the context of a simple multiple antenna system, namely MISO channel, where feedback can be used to improve

  18. Multimodal feedback for the acquisition of small targets

    E-Print Network [OSTI]

    Williamson, John

    -haptic `sticky' feedback. The tactile conditions used stimulation through vibration (rather than force- feedback the need for caution, revealing that excessive feedback can damage interaction though `noise such as vibration on a train or plane, when bright light reduces screen clarity or when using a laptop trackpoint

  19. SURVEY LEADERSHIP The Manager's Guide to Survey Feedback & Action Planning

    E-Print Network [OSTI]

    Squire, Larry R.

    SURVEY LEADERSHIP The Manager's Guide to Survey Feedback & Action Planning A guide designed to help is subject to change without notice. #12;Morehead Associates Page 2 of 115 Manager's Guide to Survey Feedback;Morehead Associates Page 3 of 115 Manager's Guide to Survey Feedback and Action Planning Action Planning

  20. The effects of driver gas contamination on shock tube test time

    E-Print Network [OSTI]

    Hawkins, Garry Owen

    1970-01-01T23:59:59.000Z

    THE EFFECTS OF DRIVER GAS CONTAMINATION ON SHOCK TUBE TEST TIME A Thesis by CARRY OWEN HAWKINS Approved as to style and content by: (Chairman of Committee) (Head of Department) (Memb e r) (Member) (Member) (Membe r) (Member) December 1970... AB S TRACT The Effects of Driver Gas Contamination on Shock Tube Test Time. (December 1970) Garry 0. Hawkins, B. S. , Texas A&M University; Directed by: Dr. Richard E. Thomas The effects of driver gas contamination are manifested in a change...

  1. P5 Science Drivers: Accelerator Experiments Panagiotis Spentzouris

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for RenewableSpeedingBiomass and BiofuelsOversight BoardP-GlycoproteiniiiScience Drivers:

  2. Philips Light Sources & Electronics is Developing an Efficient, Smaller, Cost-Effective Family of LED Drivers

    Broader source: Energy.gov [DOE]

    With the help of DOE funding, Philips Light Sources & Electronics is developing a new family of LED drivers that are more efficient and cost-effective as well as smaller in size than currently available drivers. The new drivers are switch-mode power supplies that are similar to today's drivers, but with an improved design. In addition, they have a different topology—boost plus LLC—for wattages of 40W and above, but they retain the commonly used flyback topology at lower wattages.

  3. Factors Associated with Hit-and-Run Pedestrian Fatalities and Driver Identification

    E-Print Network [OSTI]

    MacLeod, Kara E.; Griswold, Julia; Arnold, Lindsay S.; Ragland, David R

    2010-01-01T23:59:59.000Z

    Hit-and-run Crashes. Accident Analysis and Prevention, Vol.Circumstances and Drivers. Accident Analysis and Prevention,Hit-and-run Crashes. Accident Analysis and Prevention, Vol.

  4. Residential Feedback Devices and Programs: Opportunities for Natural Gas

    SciTech Connect (OSTI)

    Kerr, R.; Tondro, M.

    2012-12-01T23:59:59.000Z

    Behavior-based approaches have been a growing interest in the energy efficiency field over recent years and the use of residential energy feedback has garnered particular interest. By providing an increased level of detail, feedback can greatly increase a consumer's understanding of how energy is used in their home. This project reviewed the existing body of research on electricity feedback to identify parallel lessons for gas, discussed the benefits and challenges of different types of feedback, and identifying three feedback options that show strong potential for natural gas savings.

  5. UWB multi-burst transmit driver for averaging receivers

    DOE Patents [OSTI]

    Dallum, Gregory E

    2012-11-20T23:59:59.000Z

    A multi-burst transmitter for ultra-wideband (UWB) communication systems generates a sequence of precisely spaced RF bursts from a single trigger event. There are two oscillators in the transmitter circuit, a gated burst rate oscillator and a gated RF burst or RF power output oscillator. The burst rate oscillator produces a relatively low frequency, i.e., MHz, square wave output for a selected transmit cycle, and drives the RF burst oscillator, which produces RF bursts of much higher frequency, i.e., GHz, during the transmit cycle. The frequency of the burst rate oscillator sets the spacing of the RF burst packets. The first oscillator output passes through a bias driver to the second oscillator. The bias driver conditions, e.g., level shifts, the signal from the first oscillator for input into the second oscillator, and also controls the length of each RF burst. A trigger pulse actuates a timing circuit, formed of a flip-flop and associated reset time delay circuit, that controls the operation of the first oscillator, i.e., how long it oscillates (which defines the transmit cycle).

  6. Gaz de France ordering high-efficiency drivers

    SciTech Connect (OSTI)

    de Biasi, V.

    1980-11-01T23:59:59.000Z

    For natural gas transmission, distribution, and storage operations, Gaz de France is installing Creusot-Loire's new line of high-efficiency gas-turbine packages, powered by Allison 501 and 570 generators for compressor speeds exceeding 10,000 rpm. The Type CA.3 driver comprises a 501 generator coupled to a two-stage power turbine; the ISO base rating is 3265 kW on gas fuel with a heat rate of 12,050 Btu/kWhr. The CA.5 driver with the stronger 570 gas-turbine engine is base-rated at 4805 kW with a heat rate of 11,360 Btu/kWhr. Designed for direct-drive, with no intermediary gearing, the high-speed compressor operates on the 13,820-rpm output shaft speed of the CA.3 for baseload requirements or on 11,500 rpm for the more powerful CA.5 set. These compressor packages will serve as boosters for the transmission and storage of regasified LNG from Algeria and natural gas from the North Sea, USSR, and France's own Lacq fields.

  7. Galaxy formation with radiative and chemical feedback

    E-Print Network [OSTI]

    Graziani, L; Schneider, R; Kawata, D; de Bennassuti, M; Maselli, A

    2015-01-01T23:59:59.000Z

    Here we introduce GAMESH, a novel pipeline which implements self-consistent radiative and chemical feedback in a computational model of galaxy formation. By combining the cosmological chemical-evolution model GAMETE with the radiative transfer code CRASH, GAMESH can post process realistic outputs of a N-body simulation describing the redshift evolution of the forming galaxy. After introducing the GAMESH implementation and its features, we apply the code to a low-resolution N-body simulation of the Milky Way formation and we investigate the combined effects of self-consistent radiative and chemical feedback. Many physical properties, which can be directly compared with observations in the Galaxy and its surrounding satellites, are predicted by the code along the merger-tree assembly. The resulting redshift evolution of the Local Group star formation rates, reionisation and metal enrichment along with the predicted Metallicity Distribution Function of halo stars are critically compared with observations. We dis...

  8. Quantum feedback control and classical control theory

    SciTech Connect (OSTI)

    Doherty, Andrew C. [Department of Physics, University of Auckland, Private Bag 92019, Auckland, (New Zealand)] [Department of Physics, University of Auckland, Private Bag 92019, Auckland, (New Zealand); Habib, Salman [Theoretical Division, T-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Theoretical Division, T-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Jacobs, Kurt [Theoretical Division, T-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Theoretical Division, T-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Mabuchi, Hideo [Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125 (United States)] [Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, California 91125 (United States); Tan, Sze M. [Department of Physics, University of Auckland, Private Bag 92019, Auckland, (New Zealand)] [Department of Physics, University of Auckland, Private Bag 92019, Auckland, (New Zealand)

    2000-07-01T23:59:59.000Z

    We introduce and discuss the problem of quantum feedback control in the context of established formulations of classical control theory, examining conceptual analogies and essential differences. We describe the application of state-observer-based control laws, familiar in classical control theory, to quantum systems and apply our methods to the particular case of switching the state of a particle in a double-well potential. (c) 2000 The American Physical Society.

  9. Physical regimes for feedback in galaxy formation

    E-Print Network [OSTI]

    P. Monaco

    2004-04-13T23:59:59.000Z

    We present a new (semi-)analytic model for feedback in galaxy formation. The ISM is modeled as a two-phase medium in pressure equilibrium. The remnants of exploding type II SNe percolate into super-bubbles (SBs) that sweep the ISM, heating the hot phase (if the SB is adiabatic) or cooling it (in the snowplow stage, when the interior gas of the SB has cooled). The resulting feedback regimes occur in well-defined regions of the space defined by vertical scale-length and surface density of the structure. When SBs blow out in the adiabatic regime, the efficiency of SNe in heating the ISM is ~5 per cent, with \\~80 per cent of the energy budget injected into the external halo, and the outcoming ISM is self-regulated to a state similar to that found in the Milky Way. Feedback is most efficient when SBs are pressure-confined in the adiabatic regime. In some significant regions of the parameter space confinement takes place in the snowplow stage; then the hot phase has a lower temperature and star formation is quicker. In some critical cases, the hot phase is strongly depleted and the cold phase percolates the whole volume, giving rise to a sudden burst of star formation. Strong galactic winds are predicted to happen only in critical cases. This model provides a starting point for constructing a realistic grid of feedback solutions to be used in galaxy formation codes. The predictive power of this model extends to many properties of the ISM, so that most parameters can be constrained by reproducing the main properties of the Milky Way. (Abridged)

  10. Simulating galactic outflows with kinetic supernova feedback

    E-Print Network [OSTI]

    Claudio Dalla Vecchia; Joop Schaye

    2008-05-07T23:59:59.000Z

    Feedback from star formation is thought to play a key role in the formation and evolution of galaxies, but its implementation in cosmological simulations is currently hampered by a lack of numerical resolution. We present and test a sub-grid recipe to model feedback from massive stars in cosmological smoothed particle hydrodynamics simulations. The energy is distributed in kinetic form among the gas particles surrounding recently formed stars. The impact of the feedback is studied using a suite of high-resolution simulations of isolated disc galaxies embedded in dark halos with total mass 10^{10} and 10^{12} Msol/h. We focus in particular on the effect of pressure forces on wind particles within the disc, which we turn off temporarily in some of our runs to mimic a recipe that has been widely used in the literature. We find that this popular recipe gives dramatically different results because (ram) pressure forces on expanding superbubbles determine both the structure of the disc and the development of large-scale outflows. Pressure forces exerted by expanding superbubbles puff up the disc, giving the dwarf galaxy an irregular morphology and creating a galactic fountain in the massive galaxy. Hydrodynamic drag within the disc results in a strong increase of the effective mass loading of the wind for the dwarf galaxy, but quenches much of the outflow in the case of the high-mass galaxy.

  11. Shaping the output pulse of a linear-transformer-driver module W. A. Stygar,1

    E-Print Network [OSTI]

    Shaping the output pulse of a linear-transformer-driver module W. A. Stygar,1 W. E. Fowler,1 K. R a linear-transformer- driver (LTD) module that drives an internal water-insulated transmission line-insulated radial-transmission-line impedance transformers [Phys. Rev. ST Accel. Beams 11, 030401 (2008)]. DOI: 10

  12. Submitted to Vehicle System Dynamics An Adaptive Lateral Preview Driver Model

    E-Print Network [OSTI]

    Peng, Huei

    of the vehicle. The proposed driver model is developed using the adaptive predictive control (APC) framework inspires our interest in understanding human steering actions and the development of a driver model on the response of the vehicle. These tests can be performed with a steering and speed control robot, and thus can

  13. 1 Drivers of the projected changes to the Pacific Ocean 2 equatorial circulation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Drivers of the projected changes to the Pacific Ocean 2 equatorial circulation 3 A. Sen Gupta,1 A), 29 Drivers of the projected changes to the Pacific Ocean equatorial 30 circulation, Geophys. Res. Lett., 39, LXXXXX, doi:10.1029/ 31 2012GL051447. 32 1. Introduction 33 [2] The equatorial Pacific Ocean

  14. AABBSSTTRRAACCTT MA, RUIQI. The Effect of In-Vehicle Automation and Reliability on Driver Situation

    E-Print Network [OSTI]

    Kaber, David B.

    AABBSSTTRRAACCTT MA, RUIQI. The Effect of In-Vehicle Automation and Reliability on Driver Situation by automation and in- vehicle device use. Specifically, this study investigated the implications of adaptive; investigate the effect of varying reliability of in-vehicle automation (navigation aids) on driver SA

  15. Nighttime driver needs: an analysis of sign usage based on luminance

    E-Print Network [OSTI]

    Clark, Jerremy Eugene

    2007-09-17T23:59:59.000Z

    ? With brighter signs being visible from farther away, there is an increased opportunity for the driver to look at the sign. This thesis assesses the impact of sign brightness on the nighttime driver�s sign viewing behavior; such as the number of glances...

  16. Expert Recommendation based on Social Drivers, Social Network Analysis, and Semantic Data Representation

    E-Print Network [OSTI]

    Fox, Mark S.

    Expert Recommendation based on Social Drivers, Social Network Analysis, and Semantic Data-Theoretical Multi-Level (MTML) framework which investigates social drivers for network formation in the communities computational techniques from social network analysis and representational techniques from the semantic web

  17. UC SANTA BARBARA POLICY AND PROCEDURE Driving Records for Designated Employees and Drivers

    E-Print Network [OSTI]

    Bigelow, Stephen

    when employees are convicted of motor vehicle violations and when actions are taken against a driver a special certificate (ambulance, private school bus, farm labor vehicle, special construction equipment with this policy. C. There are criminal penalties for employing or continuing to employ as a driver a person who

  18. Catadioptric Sensor for a Simultaneous Tracking of the Driver's Face and the Road Scene

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    using head mounted devices but these systems are too intrusive in the driving task. The most popular non-intrusive to be non-intrusive and compact (to avoid distracting the driver in his task), able to observe the driver on Omnidirectional Vision, Camera Networks and Non-classical Cameras - OMNIVIS (2008)" #12;2 J-F. Layerle, X

  19. STATE OF CALIFORNIA -GENERAL SERVICES -RISK AND INSURANCE MANAGEMENT STATE DRIVER ACCIDENT REVIEW

    E-Print Network [OSTI]

    Ponce, V. Miguel

    STATE OF CALIFORNIA - GENERAL SERVICES - RISK AND INSURANCE MANAGEMENT STATE DRIVER ACCIDENT REVIEW STD. 274 (REV. 1/2003) PLEASE PRINT OR TYPE SUPERVISOR'S REVIEW - FOR DEPARTMENTAL ACCIDENT PREVENTION PURPOSE: To have supervisor investigate each driver accident, report facts and circumstances, confirm

  20. Linac-Based Proton Driver for a Neutrino Factory

    E-Print Network [OSTI]

    Garoby, R; Aiba, M; Meddahi, M

    2009-01-01T23:59:59.000Z

    A Neutrino Factory Proton Driver based on a superconducting proton linac has been designed in the CERN context. The 5 GeV/4 MW H- beam from the linac is accumulated using charge exchange injection in a fixed-energy synchrotron and afterwards transferred to a compressor ring, where bunch rotation takes place. The lattices of the accumulator and compressor are described, as well as magnet technology and RF manipulations. Critical issues related to charge-exchange injection, space-charge effects in the compressor and beam stability in the accumulator, are addressed. The analysis is focused on the baseline scenario, which provides 6 bunches on the target. Results of preliminary analysis of options with less bunches (three and one) are also presented.

  1. Recirculating induction accelerators as drivers for heavy ion fusion

    SciTech Connect (OSTI)

    Barnard, J.J.; Deadrick, F.; Friedman, A.; Grote, D.P.; Griffith, L.V.; Kirbie, H.C.; Neil, V.K.; Newton, M.A.; Paul, A.C.; Sharp, W.M.; Shay, H.D. (Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)); Bangerter, R.O.; Faltens, A.; Fong, C.G.; Judd, D.L.; Lee, E.P.; Reginato, L.L.; Yu, S.S. (Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)); Godlove, T.F. (FM Technologies, Inc., 10529-B Braddock Rd., Fairfax, Virginia 22302 (United States))

    1993-07-01T23:59:59.000Z

    A two-year study of recirculating induction heavy ion accelerators as low-cost driver for inertial-fusion energy applications was recently completed. The projected cost of a 4 MJ accelerator was estimated to be about $500 M (million) and the efficiency was estimated to be 35%. The principal technology issues include energy recovery of the ramped dipole magnets, which is achieved through use of ringing inductive/capacitive circuits, and high repetition rates of the induction cell pulsers, which is accomplished through arrays of field effect transistor (FET) switches. Principal physics issues identified include minimization of particle loss from interactions with the background gas, and more demanding emittance growth and centroid control requirements associated with the propagation of space-charge-dominated beams around bends and over large path lengths. In addition, instabilities such as the longitudinal resistive instability, beam-breakup instability and betatron-orbit instability were found to be controllable with careful design.

  2. q-deformed logistic map with delay feedback

    E-Print Network [OSTI]

    Manish Dev Shrimali; Subhashish Banerjee

    2012-03-14T23:59:59.000Z

    The delay logistic map with two types of q-deformations: Tsallis and Quantum-group type are studied. The stability of the map and its bifurcation scheme is analyzed as a function of the deformation and delay feedback parameters. Chaos is suppressed in a certain region of deformation and feedback parameter space. The steady state obtained by delay feedback is maintained in one type of deformation while chaotic behavior is recovered in another type with increasing delay.

  3. Feedback Control Using Only Quantum Back-Action

    E-Print Network [OSTI]

    Kurt Jacobs

    2009-04-24T23:59:59.000Z

    The traditional approach to feedback control is to apply forces to a system by modifying the Hamiltonian. Here we show that quantum systems can be controlled without any Hamiltonian feedback, purely by exploiting the random quantum back-action of a continuous weak measurement. We demonstrate that, quite remarkably, the quantum back-action of such an adaptive measurement is just as effective at controlling quantum systems as traditional feedback.

  4. Locally Optimal Control of Quantum Systems with Strong Feedback

    E-Print Network [OSTI]

    Alireza Shabani; Kurt Jacobs

    2008-12-07T23:59:59.000Z

    For quantum systems with high purity, we find all observables that, when continuously monitored, maximize the instantaneous reduction in the von Neumann entropy. This allows us to obtain all locally optimal feedback protocols with strong feedback, and explicit expressions for the best such protocols for systems of size N optimal protocol is the optimal protocol for a given range of control times, and derive an upper bound on all optimal protocols with strong feedback.

  5. The effects of feedback on freeway operations 

    E-Print Network [OSTI]

    Baker, Robert Lewis

    1967-01-01T23:59:59.000Z

    Model IV represents the open feedback ? feed-forward model as shown in Figure 10 ' 0 QA ftt )Q 0 (1 - p ) Pg 0 P6 g o (1 - p, ) Figure 10, Model IV Assume f(t ) to be an Erlang distribution with mean tA -- aA/bA and f(t ) to be an Erlang... = ? ' = 150 a b a variance = ? ' = 57. 5 2 b a = 150 b u ? ''=575 b2 or b =~=40 57. 5 a = 150 b = 600. 0 P ' ' F, Average volume = 600 vehicles per hour Time period = 5 minutes 60 Nu. . ber of time periods per hour = ? = 12 5 600 Average number...

  6. A comparison of some relevance feedback techniques

    E-Print Network [OSTI]

    Cashman, Leslie Edward

    1972-01-01T23:59:59.000Z

    the relevant documents. Needless to say, perfect indexing does not exist in document retr1eval systems. Yet to use relevance feedback a basic assumption has to be made. Specifically 1t must be assumed that documents relevant to a given query will res1de... results. Out ut de ictin the functionin of each strate . The vector mentioned above is printed for each iteration of each strategy. At a glance it shows how the ranks of the relevant documents vacillate from one iteration to the next. In addition...

  7. Self-assessing target with automatic feedback

    DOE Patents [OSTI]

    Larkin, Stephen W.; Kramer, Robert L.

    2004-03-02T23:59:59.000Z

    A self assessing target with four quadrants and a method of use thereof. Each quadrant containing possible causes for why shots are going into that particular quadrant rather than the center mass of the target. Each possible cause is followed by a solution intended to help the marksman correct the problem causing the marksman to shoot in that particular area. In addition, the self assessing target contains possible causes for general shooting errors and solutions to the causes of the general shooting error. The automatic feedback with instant suggestions and corrections enables the shooter to improve their marksmanship.

  8. A comparison of some relevance feedback techniques 

    E-Print Network [OSTI]

    Cashman, Leslie Edward

    1972-01-01T23:59:59.000Z

    the relevant documents. Needless to say, perfect indexing does not exist in document retr1eval systems. Yet to use relevance feedback a basic assumption has to be made. Specifically 1t must be assumed that documents relevant to a given query will res1de... results. Out ut de ictin the functionin of each strate . The vector mentioned above is printed for each iteration of each strategy. At a glance it shows how the ranks of the relevant documents vacillate from one iteration to the next. In addition...

  9. Cloud feedback studies with a physics grid

    SciTech Connect (OSTI)

    Dipankar, Anurag [Max Planck Institute for Meteorology Hamburg; Stevens, Bjorn [Max Planck Institute for Meteorology Hamburg

    2013-02-07T23:59:59.000Z

    During this project the investigators implemented a fully parallel version of dual-grid approach in main frame code ICON, implemented a fully conservative first-order interpolation scheme for horizontal remapping, integrated UCLA-LES micro-scale model into ICON to run parallely in selected columns, and did cloud feedback studies on aqua-planet setup to evaluate the classical parameterization on a small domain. The micro-scale model may be run in parallel with the classical parameterization, or it may be run on a "physics grid" independent of the dynamics grid.

  10. PROJECT MANGEMENT PLAN EXAMPLES Feedback Examples

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy ChinaofSchaeferAprilOverviewEfficiencyofHSSPIA -HazardFeedback Examples Example 74 8.2.3

  11. Effects of Feedback on Residential Electricity Consumption: A...

    Office of Scientific and Technical Information (OSTI)

    Haberkorn (1976-77) investigated feedback, information, and arebate system in 12 (6 control and 6 experimental) apartments where electricity was used for lighting, appliances,...

  12. Real-time Information, Uncertainty and Quantum Feedback Control

    E-Print Network [OSTI]

    Bo Qi; Daoyi Dong; Chunlin Chen; Lijun Liu; Zairong Xi

    2014-09-10T23:59:59.000Z

    Feedback is the core concept in cybernetics and its effective use has made great success in but not limited to the fields of engineering, biology, and computer science. When feedback is used to quantum systems, two major types of feedback control protocols including coherent feedback control (CFC) and measurement-based feedback control (MFC) have been developed. In this paper, we compare the two types of quantum feedback control protocols by focusing on the real-time information used in the feedback loop and the capability in dealing with parameter uncertainty. An equivalent relationship is established between quantum CFC and non-selective quantum MFC in the form of operator-sum representation. Using several examples of quantum feedback control, we show that quantum MFC can theoretically achieve better performance than quantum CFC in stabilizing a quantum state and dealing with Hamiltonian parameter uncertainty. The results enrich understanding of the relative advantages between quantum MFC and quantum CFC, and can provide useful information in choosing suitable feedback protocols for quantum systems.

  13. Feedback Processes [in Massive Star Formation]: A Theoretical Perspective

    E-Print Network [OSTI]

    Mordecai-Mark Mac Low

    2007-11-26T23:59:59.000Z

    I review the evidence for the importance of feedback from massive stars at small and large scales. The feedback mechanisms include accretion luminosity, ionizing radiation, collimated outflows, and stellar winds. The good news is that feedback doesn't entirely prevent the formation of massive stars, while the bad news is that we don't know what does limit their masses. Feedback from massive stars also influences their surroundings. I argue that this does not produce a triggering efficiency above unity, nor does it prevent lots of prompt star formation in GMCs, though it may preserve massive remnants of the clouds for many dynamical times.

  14. Beam-based Feedback for the Linac Coherent Light Source

    SciTech Connect (OSTI)

    Fairley, D.; Allison, S.; Chevtsov, S.; Chu, P.; Decker, F.J.; Emma, P.; Frisch, J.; Himel, T.; Kim, K.; Krejcik, P.; Loos, H.; Lahey, T.; Natampalli, P.; Peng, S.; Rogind, D.; Shoaee, H.; Straumann, T.; Williams, E.; White, G.; Wu, J.; Zelazney, M.; /SLAC

    2010-02-11T23:59:59.000Z

    Beam-based feedback control loops are required by the Linac Coherent Light Source (LCLS) program in order to provide fast, single-pulse stabilization of beam parameters. Eight transverse feedback loops, a 6 x 6 longitudinal feedback loop, and a loop to maintain the electron bunch charge were successfully prototyped in MATLAB for the LCLS, and have been maintaining stability of the LCLS electron beam at beam rates up to 30Hz. In the final commissioning phase of LCLS the beam will be operating at up to 120Hz. In order to run the feedback loops at beam rate, the feedback loops will be implemented in EPICS IOCs with a dedicated ethernet multi-cast network. This paper will discuss the design of the beam-based Fast Feedback System for LCLS. Topics include MATLAB feedback prototyping, algorithm for 120Hz feedback, network design for fast data transport, actuator and sensor design for single-pulse control and sensor readback, and feedback configuration and runtime control.

  15. artificial tactile feedback: Topics by E-print Network

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

    AD of transient model simulations and a new type of sen- sitivity experiments with artificial sea ice growth Born, Andreas 429 Vectorial Feedback with Carry Registers CERN...

  16. Data, Feedback, & Awareness Lead to Big Energy Savings | Department...

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

    Data, Feedback, & Awareness Lead to Big Energy Savings Fact sheet describes how the Navy Region Southwest Metro San Diego Area (NRSMSD) regional energy management team achieved...

  17. adaptive feedback control: Topics by E-print Network

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

    45 Adaptive Management of Irrigation with Feedback Control to Avoid Groundwater Pollution by Nitrate University of California eScholarship Repository Summary: cmhr) Soil...

  18. autocrine feedback mechanism: Topics by E-print Network

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

    A feedback mechanism based on hamiltonian tracking Quantum Physics (arXiv) Summary: Enviroment - caused dissipation disrupts the hamiltonian evolution of all quantum systems...

  19. Sliding Mode Pulsed Averaging IC Drivers for High Brightness Light Emitting Diodes

    SciTech Connect (OSTI)

    Dr. Anatoly Shteynberg, PhD

    2006-08-17T23:59:59.000Z

    This project developed new Light Emitting Diode (LED) driver ICs associated with specific (uniquely operated) switching power supplies that optimize performance for High Brightness LEDs (HB-LEDs). The drivers utilize a digital control core with a newly developed nonlinear, hysteretic/sliding mode controller with mixed-signal processing. The drivers are flexible enough to allow both traditional microprocessor interface as well as other options such as “on the fly” adjustment of color and brightness. Some other unique features of the newly developed drivers include • AC Power Factor Correction; • High power efficiency; • Substantially fewer external components should be required, leading to substantial reduction of Bill of Materials (BOM). Thus, the LED drivers developed in this research : optimize LED performance by increasing power efficiency and power factor. Perhaps more remarkably, the LED drivers provide this improved performance at substantially reduced costs compared to the present LED power electronic driver circuits. Since one of the barriers to market penetration for HB-LEDs (in particular “white” light LEDs) is cost/lumen, this research makes important contributions in helping the advancement of SSL consumer acceptance and usage.

  20. Transition-edge sensor with enhanced electrothermal feedback for cryogenic particle detection

    DOE Patents [OSTI]

    Nam, Sae Woo (Palo Alto, CA); Cabrera, Blas (Stanford, CA)

    2001-01-01T23:59:59.000Z

    A superconducting transition-edge sensor with an electrothermal-feedback circuit, a heat sink thermally coupled thereto, a bias-feedback circuit electrically coupled with the electrothermal feedback circuit, and a current sensor electrically coupled with the bias-feedback circuit and inductively coupled with the electrothermal-feedback circuit.

  1. Negative feedback effects on star formation history and cosmic reionization

    E-Print Network [OSTI]

    Lei Wang; Jirong Mao; Shouping Xiang; Ye-Fei Yuan

    2008-12-22T23:59:59.000Z

    After considering the effects of negative feedback on the process of star formation, we explore the relationship between star formation process and the associated feedback, by investigating how the mechanical feedback from supernovae(SNe) and radiative feedback from luminous objects regulate the star formation rate and therefore affect the cosmic reionization.Based on our present knowledge of the negative feedback theory and some numerical simulations, we construct an analytic model in the framework of the Lambda cold dark matter model. In certain parameter regions, our model can explain some observational results properly. In large halos(T_vir>10000 K), both mechanical and radiative feedback have a similar behavior: the relative strength of negative feedback reduces as the redshift decreases. In contrast, in small halos (T_virfeedback gets stronger when the redshift decreases. And the star formation rate in these small halos depends very weakly on the star-formation efficiency. Our results show that the radiative feedback is important for the early generation stars. It can suppress the star formation rate considerably. But the mechanical feedback from the SNe explosions is not able to affect the early star formation significantly. The early star formation in small-halo objects is likely to be self-regulated. The radiative and mechanical feedback dominates the star formation rate of the PopII/I stars all along. The feedback from first generation stars is very strong and should not be neglected. However, their effects on the cosmic reionization are not significant, which results in a small contribution to the optical depth of Thomson scattering.

  2. Physics at an upgraded proton driver at Fermilab

    SciTech Connect (OSTI)

    Steve Geer

    2004-07-28T23:59:59.000Z

    The accelerator-based particle physics program in the US is entering a period of transition. This is particularly true at Fermilab which for more than two decades has been the home of the Tevatron Proton-Antiproton Collider, the World's highest energy hadron collider. In a few years time the energy frontier will move to the LHC at CERN. Hence, if an accelerator-based program is to survive at Fermilab, it must evolve. Fermilab is fortunate in that, in addition to hosting the Tevatron Collider, the laboratory also hosts the US accelerator-based neutrino program. The recent discovery that neutrino flavors oscillate has opened a new exciting world for us to explore, and has created an opportunity for the Fermilab accelerator complex to continue to address the cutting-edge questions of particle physics beyond the Tevatron Collider era. The presently foreseen neutrino oscillation experiments at Fermilab (MiniBooNE [1] and MINOS [2]) will enable the laboratory to begin contributing to the Global oscillation physics program in the near future, and will help us better understand the basic parameters describing the oscillations. However, this is only a first step. To be able to pin down all of the oscillation parameters, and hopefully make new discoveries along the way, we will need high statistics experiments, which will require a very intense neutrino beam, and one or more very massive detectors. In particular we will require new MW-scale primary proton beams and perhaps ultimately a Neutrino Factory [3]. Plans to upgrade the Fermilab Proton Driver are presently being developed [4]. The upgrade project would replace the Fermilab Booster with a new 8 GeV accelerator with 0.5-2 MW beam power, a factor of 15-60 more than the current Booster. It would also make the modifications needed to the Fermilab Main Injector (MI) to upgrade it to simultaneously provide 120 GeV beams of 2 MW. This would enable a factor of 5-10 increase in neutrino beam intensities at the MI, while also supporting a vigorous 8 GeV fixed-target program. In addition, a Proton Driver might also serve as a stepping-stone to future accelerators, both as an R&D test bed and as an injector, with connections to the Linear Collider, Neutrino Factories, and a VLHC. Hence, although neutrino physics would provide the main thrust for the science program at an upgraded Fermilab proton source, the new facility would also offer exciting opportunities for other fixed-target particle physics (kaons, muons, neutrons, antiprotons, etc.) and a path towards new accelerators in the future.

  3. Stabilising entanglement by quantum jump-based feedback

    E-Print Network [OSTI]

    A. R. R. Carvalho; J. J. Hope

    2007-05-24T23:59:59.000Z

    We show that direct feedback based on quantum jump detection can be used to generate entangled steady states. We present a strategy that is insensitive to detection inefficiencies and robust against errors in the control Hamiltonian. This feedback procedure is also shown to overcome spontaneous emission effects by stabilising states with high degree of entanglement.

  4. Applying Feedback Control to QoS Management Giovanna Ferrari

    E-Print Network [OSTI]

    Newcastle upon Tyne, University of

    Applying Feedback Control to QoS Management Giovanna Ferrari Distributed Systems Group, Department The importance of Feedback Control Theory used for dynamic systems has grown in recent years, due to the fundamental role played in modern technological systems. It represents a well developed analytic foundation

  5. Direct laser additive fabrication system with image feedback control

    DOE Patents [OSTI]

    Griffith, Michelle L. (Albuquerque, NM); Hofmeister, William H. (Nashville, TN); Knorovsky, Gerald A. (Albuquerque, NM); MacCallum, Danny O. (Edgewood, NM); Schlienger, M. Eric (Albuquerque, NM); Smugeresky, John E. (Pleasanton, CA)

    2002-01-01T23:59:59.000Z

    A closed-loop, feedback-controlled direct laser fabrication system is disclosed. The feedback refers to the actual growth conditions obtained by real-time analysis of thermal radiation images. The resulting system can fabricate components with severalfold improvement in dimensional tolerances and surface finish.

  6. Feedback stabilization of unstable propagating waves Eugene Mihaliuk,1

    E-Print Network [OSTI]

    Showalter, Kenneth

    Feedback stabilization of unstable propagating waves Eugene Mihaliuk,1 Tatsunari Sakurai,1 Florin Received 29 July 2001; revised manuscript received 10 March 2002; published 26 June 2002 Propagating wave s : 82.40.Ck, 47.54. r Propagating waves in active media arise from the cou- pling of a positive feedback

  7. State-Feedback Optimal Controllers for Deterministic Nonlinear Systems

    E-Print Network [OSTI]

    Won, Chang-Hee

    State-Feedback Optimal Controllers for Deterministic Nonlinear Systems Chang-Hee Won*, Abstract-- A full-state feedback optimal control problem is solved for a general deterministic nonlinear system)777-3368, won@und.edu II. HAMILTON-JACOBI EQUATION AND OPTIMAL CONTROLLER Consider the following system, dx

  8. Behavioral/Systems/Cognitive Visual Feedback Control of Hand Movements

    E-Print Network [OSTI]

    Knill, David C.

    -based control. Results were well fit by a control model that optimally integrates noisy, delayed sensory solely on feed- back about hand position. A visual feedback controller might steer to maintainBehavioral/Systems/Cognitive Visual Feedback Control of Hand Movements Jeffrey A. Saunders

  9. Modular Quantum Memories Using Passive Linear Optics and Coherent Feedback

    E-Print Network [OSTI]

    Modular Quantum Memories Using Passive Linear Optics and Coherent Feedback Hendra I. Nurdin photon pulsed optical field has a conceptually simple modular realization using only passive linear optics and coherent feedback. We exploit the idea that two decaying optical cavities can be coupled

  10. Integrating Tactile and Force Feedback with Finite Element Models

    E-Print Network [OSTI]

    , impedances of robot arms, and the computational model. We also describe an implementation of a compliance rendering system combining a low-impedance robot arm for large workspace kinesthetic force feedback, a high on a low-impedance robot arm, used here as a force feedback device. A real-time FEM model accepts user

  11. Handy feedback: Connecting smart meters with mobile phones

    E-Print Network [OSTI]

    and immediate feedback between 5% and 15% of the electrical household energy consumption can be saved [4 limitations of existing electricity consumption monitor- ing systems. It offers the possibility system provides both: real-time feedback on the entire electricity usage and on the consumption of many

  12. Combinatorial Optimization with Feedback Artificial Neural Networks \\Lambda

    E-Print Network [OSTI]

    Peterson, Carsten

    Combinatorial Optimization with Feedback Artificial Neural Networks \\Lambda Carsten Peterson@thep.lu.se Abstract A brief review is given for using feedback artificial neural networks (ANN) to obtain good Neural Networks, Oc­ tober 1995, Paris, France , eds. F. Fogelman­Soulie and P. Gallinari, EC2 & Cie

  13. STABILIZATION OF THE UNICYCLE VIA DYNAMIC FEEDBACK LINEARIZATION

    E-Print Network [OSTI]

    De Luca, Alessandro

    consider the feedback control problem for a wheeled mobile robot with the kinematics of a unicycle, a typical example of nonholonomic robotic system. It is shown that dynamic feedback linearization can be used to design a simple control law which is valid for trajectory tracking as well as point

  14. S. Boyd EE102 Dynamic analysis of feedback

    E-Print Network [OSTI]

    for some frequencies, small for others · step response of G shows time response of the closed-loop system of feedback 13­12 #12;Heater example: dynamic analysis proportional controller of lecture 12, PSfrag of feedback 13­14 #12;Let's assume · Tamb = 70 F · Tdes = 150 F (actually doesn't matter) · D is a unit step

  15. Observed Feedback between Winter Sea Ice and the North Atlantic Oscillation

    E-Print Network [OSTI]

    Strong, Courtenay; Magnusdottir, Gudrun; Stern, Hal

    2009-01-01T23:59:59.000Z

    variability and climate feedbacks in a global coupled model.Ocean JOURNAL OF CLIMATE feedback on the North Atlantic2009 STRONG ET AL. Observed Feedback between Winter Sea Ice

  16. A Usability Study of a Social Media Prototype for Building Energy Feedback and Operations

    E-Print Network [OSTI]

    Lehrer, David R.; Vasudev, Janani; Kaam, Soazig

    2014-01-01T23:59:59.000Z

    A pilot for a residential energy feedback program allowedscale residential pilots of real-time energy feedback thatresidential settings using a variety of interventions such as financial incentives, energy feedback,

  17. Design of VAX software for a generalized feedback system

    SciTech Connect (OSTI)

    Rouse, F.; Castillo, S.; Himmel, T.; Sass, B.; Shoaee, H.

    1991-05-01T23:59:59.000Z

    Fast feedback in the Stanford Linear Collider (SLC) not only works, but is necessary. We have several examples of currently running systems that have greatly improved the performance of the accelerator. In order to increase the number of feedback loops, it has become necessary to redesign the system to allow a database description of any feedback loop. We use digital control theory to formally describe each feedback loop in terms of a matrix equation. Then a new feedback loop requires only an update to the database, and perhaps the installation of a inter-micro communications link. This paper details the design of the VAX software required to implement the new system. 3 refs., 5 figs.

  18. Dynamic analysis of policy drivers for bioenergy commodity markets

    SciTech Connect (OSTI)

    Robert F. Jeffers; Jacob J. Jacobson; Erin M. Searcy

    2001-01-01T23:59:59.000Z

    Biomass is increasingly being considered as a feedstock to provide a clean and renewable source of energy in the form of both liquid fuels and electric power. In the United States, the biofuels and biopower industries are regulated by different policies and have different drivers which impact the maximum price the industries are willing to pay for biomass. This article describes a dynamic computer simulation model that analyzes future behavior of bioenergy feedstock markets given policy and technical options. The model simulates the long-term dynamics of these markets by treating advanced biomass feedstocks as a commodity and projecting the total demand of each industry as well as the market price over time. The model is used for an analysis of the United States bioenergy feedstock market that projects supply, demand, and market price given three independent buyers: domestic biopower, domestic biofuels, and foreign exports. With base-case assumptions, the biofuels industry is able to dominate the market and meet the federal Renewable Fuel Standard (RFS) targets for advanced biofuels. Further analyses suggest that United States bioenergy studies should include estimates of export demand in their projections, and that GHG-limiting policy would partially shield both industries from exporter dominance.

  19. Temperature as a driver for the expansion of the microalga Gonyostomum semen in Swedish lakes

    E-Print Network [OSTI]

    Temperature as a driver for the expansion of the microalga Gonyostomum semen in Swedish lakes Karin is an example of invasive harmful microalgae (Neilan et al., 2003). Another presumably invasive species

  20. Fourth Annual Ethical Leadership Conference Panel Drivers, Challenges, and Strategies for Future of Corporate

    E-Print Network [OSTI]

    Lin, Xiaodong

    Fourth Annual Ethical Leadership Conference Panel Drivers, Challenges, and Strategies for Future, Academy of Management Review, Academy of Management Perspectives, Business & Society, Long Range Planning Social Responsibility for Hess Corporation, a global integrated energy company based in New York City

  1. Emergency vehicle driver training by Texas municipal police departments: a descriptive study

    E-Print Network [OSTI]

    Westmoreland, Robert Lawrence

    1994-01-01T23:59:59.000Z

    Because of the increase in the number of monetary civil judgments arising out of police emergency driving situations, law enforcement agencies are taking a critical look at their emergency driver training programs. At the present time...

  2. Summary of sessions B and F: High intensity linacs and frontend & proton drivers

    SciTech Connect (OSTI)

    Ferdinand, R.; /Saclay; Chou, W.; /Fermilab; Galambos, J.; /Oak Ridge

    2005-01-01T23:59:59.000Z

    This paper summarizes the sessions B&F of the 33rd ICFA Advanced Beam Dynamics Workshop on High Intensity & High Brightness Hadron Beams held in Bensheim, Germany. It covers high intensity linacs, front ends and proton driver topics.

  3. The physics issues that determine inertial confinement fusion target gain and driver requirements: A tutorial*

    E-Print Network [OSTI]

    with simple models for hohlraum wall energy loss to predict coupling efficiencies and a simple one into running the driver. More- over, the unrecycled portion of energy produced must be sufficient to sell

  4. Efficacy, national/international practices and motivational factors of lifelong driver education for the aging population

    E-Print Network [OSTI]

    Israels, Richard (Richard Steven)

    2006-01-01T23:59:59.000Z

    In a society facing a significant increase in its aging population, older driver education/training is emerging as a potential solution to help seniors drive more safely, thus maintaining their mobility and quality of life. ...

  5. active-load laser driver: Topics by E-print Network

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

    Summary: BGD 9, 14437-14473, 2012 Soil carbon drivers and benchmarks in Earth system models K. E. O. Todd if available. Causes of variation in soil carbon predictions from...

  6. Age and cross-cultural comparison of drivers' cognitive workload and performance in simulated urban driving

    E-Print Network [OSTI]

    Son, J.

    Driving demands significant psychomotor attention and requires even more when drivers are engaged in secondary tasks that increase cognitive workload and divert attention. It is well established that age influences driving ...

  7. A feedback microprocessor for hadron colliders

    SciTech Connect (OSTI)

    Herrup, D.A.; Chapman, L.; Franck, A.; Groves, T.; Lublinsky, B.

    1992-12-01T23:59:59.000Z

    A feedback microprocessor has been built for the TEVATRON. It has been constructed to be applicable to hadron colliders in general. Its inputs are realtime accelerator measurements, data describing the state of the TEVATRON, and ramp tables. The microprocessor software includes a finite state machine. Each state corresponds to a specific TEVATRON operation and has a state-specific TEVATRON model. Transitions between states are initiated by the global TEVATRON clock. Each state includes a cyclic routine which is called periodically and where all calculations are performed. The output corrections are inserted onto a fast TEVATRON-wide link from which the power supplies will read the realtime corrections. We also store all of the input data and output corrections in a set of buffers which can easily be retrieved for diagnostic analysis. In this paper we will describe this device and its use to control the TEVATRON tunes as well as other possible applications.

  8. Feedback mechanism for smart nozzles and nebulizers

    DOE Patents [OSTI]

    Montaser, Akbar [Potomac, MD; Jorabchi, Kaveh [Arlington, VA; Kahen, Kaveh [Kleinburg, CA

    2009-01-27T23:59:59.000Z

    Nozzles and nebulizers able to produce aerosol with optimum and reproducible quality based on feedback information obtained using laser imaging techniques. Two laser-based imaging techniques based on particle image velocimetry (PTV) and optical patternation map and contrast size and velocity distributions for indirect and direct pneumatic nebulizations in plasma spectrometry. Two pulses from thin laser sheet with known time difference illuminate droplets flow field. Charge coupled device (CCL)) captures scattering of laser light from droplets, providing two instantaneous particle images. Pointwise cross-correlation of corresponding images yields two-dimensional velocity map of aerosol velocity field. For droplet size distribution studies, solution is doped with fluorescent dye and both laser induced florescence (LIF) and Mie scattering images are captured simultaneously by two CCDs with the same field of view. Ratio of LIF/Mie images provides relative droplet size information, then scaled by point calibration method via phase Doppler particle analyzer.

  9. Combustion diagnostic for active engine feedback control

    DOE Patents [OSTI]

    Green, Jr., Johney Boyd (Knoxville, TN); Daw, Charles Stuart (Knoxville, TN); Wagner, Robert Milton (Knoxville, TN)

    2007-10-02T23:59:59.000Z

    This invention detects the crank angle location where combustion switches from premixed to diffusion, referred to as the transition index, and uses that location to define integration limits that measure the portions of heat released during the combustion process that occur during the premixed and diffusion phases. Those integrated premixed and diffusion values are used to develop a metric referred to as the combustion index. The combustion index is defined as the integrated diffusion contribution divided by the integrated premixed contribution. As the EGR rate is increased enough to enter the low temperature combustion regime, PM emissions decrease because more of the combustion process is occurring over the premixed portion of the heat release rate profile and the diffusion portion has been significantly reduced. This information is used to detect when the engine is or is not operating in a low temperature combustion mode and provides that feedback to an engine control algorithm.

  10. Cosmological Galaxy Evolution with Superbubble Feedback I: Realistic Galaxies with Moderate Feedback

    E-Print Network [OSTI]

    Keller, B W; Couchman, H M P

    2015-01-01T23:59:59.000Z

    We present the first cosmological galaxy evolved using the modern smoothed particle hydrodynamics (SPH) code GASOLINE2 with superbubble feedback. We show that superbubble-driven galactic outflows powered by Type II supernovae alone can produce $\\rm{L^*}$ galaxies with flat rotation curves with circular velocities $\\sim 200\\; \\rm{km/s}$, low bulge-to-disc ratios, and stellar mass fractions that match observed values from high redshift to the present. These features are made possible by the high mass loadings generated by the evaporative growth of superbubbles. Outflows are driven extremely effectively at high redshift, expelling gas at early times and preventing overproduction of stars before $z=2$. Centrally concentrated gas in previous simulations has often lead to unrealistically high bulge to total ratios and strongly peaked rotation curves. We show that supernova-powered superbubbles alone can produce galaxies that agree well with observed properties without the need for additional feedback mechanisms or ...

  11. Adaptacin de un driver WLAN Linux a una arquitectura NIOS-Avalon

    E-Print Network [OSTI]

    Autònoma de Barcelona, Universitat

    Adaptación de un driver WLAN Linux a una arquitectura NIOS-Avalon B. Martínez , I. Tarruella, D de un driver Linux se realiza un mapeo sobre una arquitectura basada en un procesador integrado dentro de un SoC. La elección de la partición Hw/Sw y de ciertos parámetros de la arquitectura se

  12. Review of a Spoke-Cavity Design Option for the RIA Driver Linac

    SciTech Connect (OSTI)

    Petr Ostroumov; Kenneth Shepard; Jean Delayen

    2005-05-16T23:59:59.000Z

    A design option for the 1.4 GV, multiple-charge-state driver linac required for the U. S. Rare Isotope Accelerator Project based on 345 MHz, 3-cell spoke-loaded cavities has been previously discussed [1]. This paper updates consideration of design options for the RIA driver, including recent results from numerically-modeling the multi-charge-state beam dynamics and also cold test results for prototype superconducting niobium 3-cell spoke-loaded cavities.

  13. High Power Wideband AlGaN/GaN HEMT Feedback Amplifier Module with Drain and Feedback Loop

    E-Print Network [OSTI]

    Itoh, Tatsuo

    High Power Wideband AlGaN/GaN HEMT Feedback Amplifier Module with Drain and Feedback Loop amplifier module using AlGaN/GaN high electron mobility transistor (HEMT) has been developed that covers radars and communications systems. GaN-based HEMT's for high power applications at microwave frequencies

  14. Effects of optical feedback in a birefringence-Zeeman dual frequency laser at high optical feedback levels

    SciTech Connect (OSTI)

    Mao Wei; Zhang Shulian

    2007-04-20T23:59:59.000Z

    Optical feedback effects are studied in a birefringence-Zeeman dual frequency laser at high optical feedback levels. The intensity modulation features of the two orthogonally polarized lights are investigated in both isotropic optical feedback (IOF) and polarized optical feedback (POF). In IOF, the intensities of both beams are modulated simultaneously, and four zones, i.e., the e-light zone, the o-light and e-light zone, the o-light zone, and the no-light zone, are formed in a period corresponding to a half laser wavelength displacement of the feedback mirror. In POF, the two orthogonally polarized lights will oscillate alternately. Strong mode competition can be observed, and it affects the phase difference between the two beams greatly. The theoretical analysis is presented, which is in good agreement with the experimental results. The potential use of the experimental results is also discussed.

  15. DRIVERS OF H I TURBULENCE IN DWARF GALAXIES

    SciTech Connect (OSTI)

    Stilp, Adrienne M.; Dalcanton, Julianne J. [Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195 (United States); Skillman, Evan [Minnesota Institute for Astrophysics, University of Minnesota, 116 Church Street SE, Minneapolis, MN 55455 (United States); Warren, Steven R. [Department of Astronomy, University of Maryland, CSS Building, Room 1024, Stadium Drive, College Park, MD 20742-2421 (United States); Ott, Juergen [National Radio Astronomy Observatory, P.O. Box O, 1003 Lopezville Road, Socorro, NM 87801 (United States); Koribalski, Baerbel [Australia Telescope National Facility, CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710 (Australia)

    2013-08-20T23:59:59.000Z

    Neutral hydrogen (H I) velocity dispersions are believed to be set by turbulence in the interstellar medium (ISM). Although turbulence is widely believed to be driven by star formation, recent studies have shown that this driving mechanism may not be dominant in regions of low star formation surface density ({Sigma}{sub SFR}), such those as found in dwarf galaxies or the outer regions of spirals. We have generated average H I line profiles in a number of nearby dwarfs and low-mass spirals by co-adding H I spectra in subregions with either a common radius or {Sigma}{sub SFR}. We find that the individual spatially resolved ''superprofiles'' are composed of a central narrow peak ({approx}5-15 km s{sup -1}) with higher velocity wings to either side, similar to their global counterparts as calculated for the galaxy as a whole. Under the assumption that the central peak reflects the H I turbulent velocity dispersion, we compare measures of H I kinematics determined from the superprofiles to local ISM properties, including surface mass densities and measures of star formation. The shape of the wings of the superprofiles do not show any correlation with local ISM properties, which indicates that they may be an intrinsic feature of H I line-of-sight spectra. On the other hand, the H I velocity dispersion is correlated most strongly with baryonic and H I surface mass density, which points toward a gravitational origin for turbulence, but it is unclear which, if any, gravitational instabilities are able to operate efficiently in these systems. Star formation energy is typically produced at a level sufficient to drive H I turbulent motions at realistic coupling efficiencies in regimes where {Sigma}{sub SFR} {approx}> 10{sup -4} M{sub Sun} yr{sup -1} kpc{sup -2}, as is typically found in inner spiral disks. At low star formation intensities, on the other hand, star formation cannot supply enough energy to drive the observed turbulence, nor does it uniquely determine the turbulent velocity dispersion. Nevertheless, even at low intensity, star formation does appear to provide a lower threshold for H I velocity dispersions. We find a pronounced decrease in coupling efficiency with increasing {Sigma}{sub SFR}, which would be consistent with a picture where star formation couples to the ISM with constant efficiency, but that less of that energy is found in the neutral phase at higher {Sigma}{sub SFR}. We have examined a number of potential drivers of H I turbulence, including star formation, gravitational instabilities, the magneto-rotational instability, and accretion-driven turbulence, and found that, individually, none of these drivers is capable of driving the observed levels of turbulence in the low {Sigma}{sub SFR} regime. We discuss possible solutions to this conundrum.

  16. Radiative Feedback in Relic HII Regions at High-Redshift

    E-Print Network [OSTI]

    Andrei Mesinger; Greg L. Bryan; Zoltan Haiman

    2009-09-13T23:59:59.000Z

    UV radiation from early astrophysical sources could have a large impact on subsequent star formation in nearby protogalaxies. Here we study the radiative feedback from the first, short-lived stars using hydrodynamical simulations with transient UV backgrounds (UVBs) and persistent Lyman-Werner backgrounds (LWBs) of varying intensity. We extend our prior work in Mesinger et al. (2006), by studying a more typical region whose proto-galaxies form at lower redshifts, z~13-20, in the epoch likely preceding the bulk of reionization. We confirm our previous results that feedback in the relic HII regions resulting from such transient radiation, is itself transient. Feedback effects dwindle away after ~30% of the Hubble time, and the same critical specific intensity of J_UV~0.1 x 10^{-21} ergs/s/cm^2/Hz/sr separates positive and negative feedback regimes. Additionally, we discover a second episode of eventual positive feedback in halos which have not yet collapsed when their progenitor regions were exposed to the transient UVB. This eventual positive feedback appears in all runs, regardless of the strength of the UVB. However, this feedback regime is very sensitive to the presence of Lyman-Werner radiation, and notable effects disappear under fairly modest background intensities of J_LW>10^{-3} x 10^{-21} ergs/s/cm^2/Hz/sr. We conclude that UV radiative feedback in relic HII regions, although a complicated process, seems unlikely to have a major impact on the progress of cosmological reionization, provided that present estimates of the lifetime and luminosity of a PopIII star are accurate. More likely is that the build-up of the LWB ultimately governs the feedback strength until a persistent UV background can be established. [abridged

  17. Feedback generation of quantum Fock states by discrete QND measures

    E-Print Network [OSTI]

    Mazyar Mirrahimi; Igor Dotsenko; Pierre Rouchon

    2009-05-04T23:59:59.000Z

    A feedback scheme for preparation of photon number states in a microwave cavity is proposed. Quantum Non Demolition (QND) measurement of the cavity field provides information on its actual state. The control consists in injecting into the cavity mode a microwave pulse adjusted to maximize the population of the desired target photon number. In the ideal case (perfect cavity and measures), we present the feedback scheme and its detailed convergence proof through stochastic Lyapunov techniques based on super-martingales and other probabilistic arguments. Quantum Monte-Carlo simulations performed with experimental parameters illustrate convergence and robustness of such feedback scheme.

  18. Coherent-feedback quantum control with a dynamic compensator

    E-Print Network [OSTI]

    Hideo Mabuchi

    2008-03-13T23:59:59.000Z

    I present an experimental realization of a coherent-feedback control system that was recently proposed for testing basic principles of linear quantum stochastic control theory [M. R. James, H. I. Nurdin and I. R. Petersen, to appear in IEEE Transactions on Automatic Control (2008), arXiv:quant-ph/0703150v2]. For a dynamical plant consisting of an optical ring-resonator, I demonstrate ~ 7 dB broadband disturbance rejection of injected laser signals via all-optical feedback with a tailored dynamic compensator. Comparison of the results with a transfer function model pinpoints critical parameters that determine the coherent-feedback control system's performance.

  19. Optical bistability in nonlinear system with two loops of feedback

    E-Print Network [OSTI]

    George P. Miroshnichenko; Alexander I. Trifanov

    2010-11-16T23:59:59.000Z

    A model of nonlinear optical system surrounded by two loops of feedback is investigated. The cell with the vapor of rubidium - type atoms is taken in the capacity of nonlinear element. Two modes of near-resonant electromagnetic field interacting with the cell are involved in the feedback. Two-dimensional optical bistability domain in location of input field intensities is obtained and dependence of its form and magnitude from the system parameters (photon detunings, feedback factor etc.) is investigated. "Input - output" relations corresponding to different trajectories in the bistability domain are obtained. Cross-hysteresis is studied.

  20. Self-consistent input-output formulation of quantum feedback

    SciTech Connect (OSTI)

    Yanagisawa, M. [Department of Engineering, The Australian National University, Canberra, ACT 0200 (Australia); Hope, J. J. [Department of Quantum Science, The Australian National University, Canberra, ACT 0200 (Australia)

    2010-12-15T23:59:59.000Z

    A simple method of analyzing quantum feedback circuits is presented. The classical analysis of feedback circuits can be generalized to apply to quantum systems by mapping the field operators of various outputs to other inputs via the standard input-output formalism. Unfortunately, this has led to unphysical results such as the violation of the Heisenberg uncertainty principle for in-loop fields. This paper shows that this general approach can be redeemed by ensuring a self-consistently Hermitian Hamiltonian. The calculations are based on a noncommutative calculus of operator derivatives. A full description of several examples of quantum linear and nonlinear feedback for optical systems is presented.

  1. Efficiency of feedback process in cavity quantum electrodynamics

    E-Print Network [OSTI]

    H. T. Fung; P. T. Leung

    2007-08-02T23:59:59.000Z

    Utilizing the continuous frequency mode quantization scheme, we study from first principle the efficiency of a feedback scheme that can generate maximally entangled states of two atoms in an optical cavity through their interactions with a single input photon. The spectral function of the photon emitted from the cavity, which will be used as the input of the next round in the feedback process, is obtained analytically. We find that the spectral function of the photon is modified in each round and deviates from the original one. The efficiency of the feedback scheme consequently deteriorates gradually after several rounds of operation.

  2. The wind power probability density forecast problem can be formulated as: forecast the wind power pdf at time step t for each look-ahead time step t+k of a given time-horizon

    E-Print Network [OSTI]

    Kemner, Ken

    The wind power probability density forecast problem can be formulated as: forecast the wind power ahead) knowing a set of explanatory variables (e.g. numerical weather predictions (NWPs), wind power measured values). Translating this sentence to an equation, we have: where pt+k is the wind power

  3. A feedback microprocessor for hadron colliders

    SciTech Connect (OSTI)

    Herrup, D.A.; Chapman, L.; Franck, A.; Groves, T.; Lublinsky, B. (Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States))

    1995-02-01T23:59:59.000Z

    A feedback microprocessor has been built for the Tevatron. It has been constructed to be applicable to hadron colliders in general. Its inputs are realtime accelerator measurements, data describing the state of the Tevatron, and ramp tables. The microprocessor software includes a finite-state machine. Each state corresponds to a specific Tevatron operation and has a state-specific Tevatron model. Transitions between states are initiated by the global Tevatron clock. Each state includes a cyclic routine, which is called periodically and where all calculations are performed. The output corrections are inserted onto a fast Tevatron-wide link from which the power supplies will read the real time corrections. We also store all of the input data and output corrections in a set of buffers that can easily be retrieved for diagnostic analysis. In this paper we describe this device and its use to control the Tevatron tunes as well as other possible applications. [copyright] 1995 [ital American] [ital Institute] [ital of] [ital Physics

  4. agn feedback observations: Topics by E-print Network

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

    Christopher S; Heinz, Sebastian 2008-01-01 18 Feeding Versus Feedback in AGNs from Near-Infrared IFU Observations: The Case of Mrk79 CERN Preprints Summary: We have mapped the...

  5. Ratee Reactions: Negative Feedback as a Motivating Source

    E-Print Network [OSTI]

    Kabins, Adam Howard

    2012-02-14T23:59:59.000Z

    orientation and performance prove goal orientation were consistent significant moderators of the negative feedback-regulation relationship, such that individuals with high levels of Mastery prove goal orientation increased their autonomous regulation at higher...

  6. Code design for erasure channels with limited or noisy feedback

    E-Print Network [OSTI]

    Nagasubramanian, Karthik

    2008-10-10T23:59:59.000Z

    The availability of feedback in communication channels can significantly increase the reliability of transmission while decreasing the encoding and decoding complexity. Most of the applications like cellular telephony, satellite communications...

  7. Bursting in a Subcritical Hopf Oscillator with a Nonlinear Feedback

    E-Print Network [OSTI]

    Gautam C Sethia; Abhijit Sen

    2006-03-24T23:59:59.000Z

    Bursting is a periodic transition between a quiescent state and a state of repetitive spiking. The phenomenon is ubiquitous in a variety of neurophysical systems. We numerically study the dynamical properties of a normal form of subcritical Hopf oscillator (at the bifurcation point) subjected to a nonlinear feedback. This dynamical system shows an infinite-period or a saddle-node on a limit cycle (SNLC) bifurcation for certain strengths of the nonlinear feedback. When the feedback is time delayed, the bifurcation scenario changes and the limit cycle terminates through a homoclinic or a saddle separatrix loop (SSL) bifurcation. This system when close to the bifurcation point exhibits various types of bursting phenomenon when subjected to a slow periodic external stimulus of an appropriate strength. The time delay in the feedback enhances the spiking rate i.e. reduces the interspike interval in a burst and also increases the width or the duration of a burst.

  8. Code design for erasure channels with limited or noisy feedback

    E-Print Network [OSTI]

    Nagasubramanian, Karthik

    2009-05-15T23:59:59.000Z

    The availability of feedback in communication channels can significantly increase the reliability of transmission while decreasing the encoding and decoding complexity. Most of the applications like cellular telephony, satellite communications...

  9. Comparative analysis of aviation safety information feedback systems

    E-Print Network [OSTI]

    Funahashi, Yoshifuru

    2010-01-01T23:59:59.000Z

    In the aviation system, there are several feedback systems to prevent an accident. First of all, the accident and serious incident reporting and investigation system is established by the Chicago Convention. In general, ...

  10. Reverse quantum state engineering using electronic feedback loops

    E-Print Network [OSTI]

    Gerold Kiesslich; Clive Emary; Gernot Schaller; Tobias Brandes

    2012-11-30T23:59:59.000Z

    We propose an all-electronic technique to manipulate and control interacting quantum systems by unitary single-jump feedback conditioned on the outcome of a capacitively coupled electrometer and in particular a single-electron transistor. We provide a general scheme to stabilize pure states in the quantum system and employ an effective Hamiltonian method for the quantum master equation to elaborate on the nature of stabilizable states and the conditions under which state purification can be achieved. The state engineering within the quantum feedback scheme is shown to be linked with the solution of an inverse eigenvalue problem. Two applications of the feedback scheme are presented in detail: (i) stabilization of delocalized pure states in a single charge qubit and (ii) entanglement stabilization in two coupled charge qubits. In the latter example we demonstrate the stabilization of a maximally entangled Bell state for certain detector positions and local feedback operations.

  11. Visual Feedback in a Coordinated Hand-Eye System

    E-Print Network [OSTI]

    Woodham, Robert J.

    A system is proposed for the development of new techniques for the control and monitoring of a mechanical arm-hand. The use of visual feedback is seen to provide new interactive capabilities in a machine hand-eye system. ...

  12. Feedback Policies for Measurement-based Quantum State Manipulation

    E-Print Network [OSTI]

    Shuangshuang Fu; Guodong Shi; Alexandre Proutiere; Matthew R. James

    2014-10-24T23:59:59.000Z

    In this paper, we propose feedback designs for manipulating a quantum state to a target state by performing sequential measurements. In light of Belavkin's quantum feedback control theory, for a given set of (projective or non-projective) measurements and a given time horizon, we show that finding the measurement selection policy that maximizes the probability of successful state manipulation is an optimal control problem for a controlled Markovian process. The optimal policy is Markovian and can be solved by dynamical programming. Numerical examples indicate that making use of feedback information significantly improves the success probability compared to classical scheme without taking feedback. We also consider other objective functionals including maximizing the expected fidelity to the target state as well as minimizing the expected arrival time. The connections and differences among these objectives are also discussed.

  13. Interactive Generator: A Self-Powered Haptic Feedback Device

    E-Print Network [OSTI]

    Anderson, Richard

    of temperature, stiffness and texture, are po- tentially valuable. Unfortunately, the electric motors, solenoids to convey in- formation when auditory and visual feedback may not be appropriate or available. However

  14. Kernels for Feedback Arc Set In Tournaments Stephane Bessy

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Kernels for Feedback Arc Set In Tournaments St´ephane Bessy Fedor V. Fomin Serge Gaspers Christophe´e de Montpellier 2, CNRS, 161 rue Ada, 34392 Montpellier, France. {bessy

  15. Microphones and Knock Sensors for Feedback Control of HCCI Engines

    E-Print Network [OSTI]

    Souder, Jason S; Mack, John Hunter; Hedrick, J. Karl; Dibble, Robert W

    2004-01-01T23:59:59.000Z

    Ion a current sensing for hcci combustion feedback. SAE2004. “Combustion timing in hcci engines deter- mined byof the combustion timing in an HCCI engine at high to medium

  16. Pulsed Feedback Defers Cellular Differentiation Joe H. Levine1

    E-Print Network [OSTI]

    Elowitz, Michael

    cycles leading up to sporulation. This pulse growth required a key positive feedback loop involving, Resuspension Media; Spo0AP , phosphorylated Spo0A * E-mail: melowitz@caltech.edu Introduction Cells are capable

  17. Optimization of neural network feedback control systems using automatic differentiation

    E-Print Network [OSTI]

    Rollins, Elizabeth, S.M. Massachusetts Institute of Technology

    2009-01-01T23:59:59.000Z

    Optimal control problems can be challenging to solve, whether using analytic or numerical methods. This thesis examines the application of an adjoint method for optimal feedback control, which combines various algorithmic ...

  18. Injection Related Background due to the Transverse Feedback

    SciTech Connect (OSTI)

    Decker, F.J.; Akre, R.; Fisher, A.; Iverson, R.; Weaver, M.; /SLAC

    2008-03-18T23:59:59.000Z

    The background in the BaBar detector is especially high during injection, when most components are actually having reduced voltages. The situation is worse for the beam in High Energy Ring (HER) when the LER beam is present. It was found that the transverse feedback system plays an important role when stacking more charge on top of existing bunches. Lowering the feedback gain helped and it was realized later that the best scenario would be to gate off the feedback for only the one bunch, which got additional charge injected into it. The explanation is that the blown-up, but centered, original HER bunch plus the small injected off-axis bunch (each with half the charge) would stay in the ring if not touched, but the feedback system sees half the offset and wants to correct it, therefore disturbing and scraping the blown-up part.

  19. Feedback Effects on Low-Mass Star Formation

    E-Print Network [OSTI]

    Hansen, Charles E; McKee, Christopher F; Fisher, Robert T

    2012-01-01T23:59:59.000Z

    Protostellar feedback, both radiation and bipolar outflows, dramatically affects the fragmentation and mass accretion from star-forming cores. We use ORION, an adaptive mesh refinement gravito-radiation-hydrodynamics code, to simulate the formation of a cluster of low-mass stars, including both radiative transfer and protostellar outflows. We ran four simulations to isolate the individual effects of radiation feedback and outflow feedback as well as the combination of the two. Outflows reduce protostellar masses and accretion rates each by a factor of three and therefore reduce protostellar luminosities by an order of magnitude. Thus, while radiation feedback suppresses fragmentation, outflows render protostellar radiation largely irrelevant for low-mass star formation above a mass scale of 0.05 M_sun. We find initial fragmentation of our cloud at half the global Jeans length, ~ 0.1 pc. With insufficient protostellar radiation to stop it, these 0.1 pc cores fragment repeatedly, forming typically 10 stars each...

  20. Large Synoptic Survey Telescope: From Science Drivers to Reference Design

    SciTech Connect (OSTI)

    Ivezic, Z.; Axelrod, T.; Brandt, W.N.; Burke, D.L.; Claver, C.F.; Connolly, A.; Cook, K.H.; Gee, P.; Gilmore, D.K.; Jacoby, S.H.; Jones, R.L.; Kahn, S.M.; Kantor, J.P.; Krabbendam, V.; Lupton, R.H.; Monet, D.G.; Pinto, P.A.; Saha, A.; Schalk, T.L.; Schneider, D.P.; Strauss, Michael A.; /Washington U., Seattle, Astron. Dept. /LSST Corp. /Penn State U., Astron. Astrophys. /KIPAC, Menlo Park /NOAO, Tucson /LLNL, Livermore /UC, Davis /Princeton U., Astrophys. Sci. Dept. /Naval Observ., Flagstaff /Arizona U., Astron. Dept. - Steward Observ. /UC, Santa Cruz /Harvard U. /Johns Hopkins U. /Illinois U., Urbana

    2011-10-14T23:59:59.000Z

    In the history of astronomy, major advances in our understanding of the Universe have come from dramatic improvements in our ability to accurately measure astronomical quantities. Aided by rapid progress in information technology, current sky surveys are changing the way we view and study the Universe. Next-generation surveys will maintain this revolutionary progress. We focus here on the most ambitious survey currently planned in the visible band, the Large Synoptic Survey Telescope (LSST). LSST will have unique survey capability in the faint time domain. The LSST design is driven by four main science themes: constraining dark energy and dark matter, taking an inventory of the Solar System, exploring the transient optical sky, and mapping the Milky Way. It will be a large, wide-field ground-based system designed to obtain multiple images covering the sky that is visible from Cerro Pachon in Northern Chile. The current baseline design, with an 8.4 m (6.5 m effective) primary mirror, a 9.6 deg{sup 2} field of view, and a 3,200 Megapixel camera, will allow about 10,000 square degrees of sky to be covered using pairs of 15-second exposures in two photometric bands every three nights on average. The system is designed to yield high image quality, as well as superb astrometric and photometric accuracy. The survey area will include 30,000 deg{sup 2} with {delta} < +34.5{sup o}, and will be imaged multiple times in six bands, ugrizy, covering the wavelength range 320-1050 nm. About 90% of the observing time will be devoted to a deep-wide-fast survey mode which will observe a 20,000 deg{sup 2} region about 1000 times in the six bands during the anticipated 10 years of operation. These data will result in databases including 10 billion galaxies and a similar number of stars, and will serve the majority of science programs. The remaining 10% of the observing time will be allocated to special programs such as Very Deep and Very Fast time domain surveys. We describe how the LSST science drivers led to these choices of system parameters.

  1. POISONED FEEDBACK: THE IMPACT OF MALICIOUS USERS IN CLOSED-LOOP MULTIUSER MIMO SYSTEMS

    E-Print Network [OSTI]

    Swindlehurst, A. Lee

    POISONED FEEDBACK: THE IMPACT OF MALICIOUS USERS IN CLOSED-LOOP MULTIUSER MIMO SYSTEMS Amitav systems based on malicious feedback of CSI. In particular, we examine malicious or poisoned feedback of the trans- mitter are listed in Sec. 3. Numerical results that depict the impact of poisoned feedback

  2. Feedback Control of the Sawtooth Period through Real Time Control of the Ion Cyclotron Resonance Frequency

    E-Print Network [OSTI]

    Feedback Control of the Sawtooth Period through Real Time Control of the Ion Cyclotron Resonance Frequency

  3. Improving MU-MIMO Performance in LTE-(Advanced) by Efficiently Exploiting Feedback

    E-Print Network [OSTI]

    Gesbert, David

    (CDI/PMI). The standard supports finer granularity feedback i.e. sub-band feedback method, but it-band feedback for providing more frequent update of PMI. However, in order to support this feedback method, we), Downlink Control Information (DCI), Multi-user MIMO (MU-MIMO), Precoding Matrix Indi- cator (PMI

  4. Control of decoherence in open quantum systems using feedback

    E-Print Network [OSTI]

    Narayan Ganesan; Tzyh Jong Tarn

    2006-02-27T23:59:59.000Z

    Quantum feedback is assuming increasingly important role in quantum control and quantum information processing. In this work we analyze the application of such feedback techniques in eliminating decoherence in open quantum systems. In order to apply such system theoretic methods we first analyze the invariance properties of quadratic forms which corresponds to expected value of a measurement and present conditions for decouplability of measurement outputs of such time-varying open quantum systems from environmental effects.

  5. Domestic Audiences, Policy Feedback, and Sequential Decisions During Military Interventions

    E-Print Network [OSTI]

    Kuberski, Douglas Walter

    2011-02-22T23:59:59.000Z

    Committee Members, Michael Koch Guy Whitten Charles Hermann Head of Department, James Rogers December 2009 Major Subject: Political Science iii ABSTRACT Domestic Audiences, Policy Feedback, and Sequential Decisions During Military... how an individual citizen?s preference over commitment is impacted by policy feedback. The results of the experimental analyses suggest that citizens act as investors: they favor increasing commitment to military interventions when viewing negative...

  6. Adaptive method with intercessory feedback control for an intelligent agent

    DOE Patents [OSTI]

    Goldsmith, Steven Y.

    2004-06-22T23:59:59.000Z

    An adaptive architecture method with feedback control for an intelligent agent provides for adaptively integrating reflexive and deliberative responses to a stimulus according to a goal. An adaptive architecture method with feedback control for multiple intelligent agents provides for coordinating and adaptively integrating reflexive and deliberative responses to a stimulus according to a goal. Re-programming of the adaptive architecture is through a nexus which coordinates reflexive and deliberator components.

  7. The Geant4 Visualisation System - a multi-driver graphics system

    E-Print Network [OSTI]

    John Allison; Laurent Garnier; Akinori Kimura; Joseph Perl

    2012-12-31T23:59:59.000Z

    From the beginning the Geant4 Visualisation System was designed to support several simultaneous graphics systems written to common abstract interfaces. Today it has matured into a powerful diagnostic and presentational tool. It comes with a library of models that may be added to the current scene and which include the representation of the Geant4 geometry hierarchy, simulated trajectories and user-written hits and digitisations. The workhorse is the OpenGL suite of drivers for X, Xm, Qt and Win32. There is an Open Inventor driver. Scenes can be exported in special graphics formats for offline viewing in the DAWN, VRML, HepRApp and gMocren browsers. PostScript can be generated through OpenGL, Open Inventor, DAWN and HepRApp. Geant4's own tracking algorithms are used by the Ray Tracer. Not all drivers support all features but all drivers bring added functionality of some sort. This paper describes the interfaces and details the individual drivers.

  8. Feedback in simulations of disc-galaxy major mergers

    E-Print Network [OSTI]

    T. J. Cox; Patrik Jonsson; Joel R. Primack; Rachel S. Somerville

    2007-09-25T23:59:59.000Z

    Using hydrodynamic simulations of disc-galaxy major mergers, we investigate the star formation history and remnant properties when various parametrizations of a simple stellar feedback model are implemented. The simulations include radiative cooling, a density-dependent star formation recipe and a model for feedback from massive stars. The feedback model stores supernova feedback energy within individual gas particles and dissipates this energy on a time-scale specified by two free parameters; tau_fb, which sets the dissipative time-scale, and n, which sets the effective equation of state in star-forming regions. Using a self-consistent disc galaxy, modelled after a local Sbc spiral, in both isolated and major-merger simulations, we investigate parametrizations of the feedback model that are selected with respect to the quiescent disc stability. These models produce a range of star formation histories that are consistent with the star formation relation found by Kennicutt. All major mergers produce a population of new stars that is highly centrally concentrated, demonstrating a distinct break in the r1/4 surface density profile, consistent with previous findings. The half-mass radius and one-dimensional velocity dispersion are affected by the feedback model used. Finally, we compare our results to those of previous simulations of star formation in disc-galaxy major mergers, addressing the effects of star formation normalization, the version of smoothed particle hydrodynamics (SPH) employed and assumptions about the interstellar medium.

  9. Signal Flows in Non-Markovian Linear Quantum Feedback Networks

    E-Print Network [OSTI]

    Re-Bing Wu; Jing Zhang; Yu-xi Liu; Tzyh-Jong Tarn

    2014-12-17T23:59:59.000Z

    Enabled by rapidly developing quantum technologies, it is possible to network quantum systems at a much larger scale in the near future. To deal with non-Markovian dynamics that is prevalent in solid-state devices, we propose a general transfer function based framework for modeling linear quantum networks, in which signal flow graphs are applied to characterize the network topology by flow of quantum signals. We define a noncommutative ring $\\mathbb{D}$ and use its elements to construct Hamiltonians, transformations and transfer functions for both active and passive systems. The signal flow graph obtained for direct and indirect coherent quantum feedback systems clearly show the feedback loop via bidirectional signal flows. Importantly, the transfer function from input to output field is derived for non-Markovian quantum systems with colored inputs, from which the Markovian input-output relation can be easily obtained as a limiting case. Moreover, the transfer function possesses a symmetry structure that is analogous to the well-know scattering transformation in \\sd picture. Finally, we show that these transfer functions can be integrated to build complex feedback networks via interconnections, serial products and feedback, which may include either direct or indirect coherent feedback loops, and transfer functions between quantum signal nodes can be calculated by the Riegle's matrix gain rule. The theory paves the way for modeling, analyzing and synthesizing non-Markovian linear quantum feedback networks in the frequency-domain.

  10. Grid Parity for Residential Photovoltaics in the United States: Key Drivers and Sensitivities; Preprint

    SciTech Connect (OSTI)

    Ong, S.; Denholm, P.; Clark, N.

    2012-08-01T23:59:59.000Z

    In this report, we analyze PV break-even costs for U.S. residential customers. We evaluate some key drivers of grid parity both regionally and over time. We also examine the impact of moving from flat to time-of-use (TOU) rates, and we evaluate individual components of the break-even cost, including effect of rate structure and various incentives. Finally, we examine how PV markets might evolve on a regional basis considering the sensitivity of the break-even cost to four major drivers: technical performance, financing parameters, electricity prices and rates, and policies. We find that electricity price rather than technical parameters are in general the key drivers of the break-even cost of PV. Additionally, this analysis provides insight about the potential viability of PV markets.

  11. Fast BPM data distribution for global orbit feedback using commercial gigabit ethernet technology

    SciTech Connect (OSTI)

    Hulsart, R.; Cerniglia, P.; Michnoff, R.; Minty, M.

    2011-03-28T23:59:59.000Z

    In order to correct beam perturbations in RHIC around 10Hz, a new fast data distribution network was required to deliver BPM position data at rates several orders of magnitude above the capability of the existing system. The urgency of the project limited the amount of custom hardware that could be developed, which dictated the use of as much commercially available equipment as possible. The selected architecture uses a custom hardware interface to the existing RHIC BPM electronics together with commercially available Gigabit Ethernet switches to distribute position data to devices located around the collider ring. Using the minimum Ethernet packet size and a field programmable gate array (FPGA) based state machine logic instead of a software based driver, real-time and deterministic data delivery is possible using Ethernet. The method of adapting this protocol for low latency data delivery, bench testing of Ethernet hardware, and the logic to construct Ethernet packets using FPGA hardware will be discussed. A robust communications system using almost all commercial off-the-shelf equipment was developed in under a year which enabled retrofitting of the existing RHIC BPM system to provide 10 KHz data delivery for a global orbit feedback scheme using 72 BPMs. Total latencies from data acquisition at the BPMs to delivery at the controller modules, including very long transmission distances, were kept under 100 {micro}s, which provide very little phase error in correcting the 10 Hz oscillations. Leveraging off of the speed of Gigabit Ethernet and wide availability of Ethernet products enabled this solution to be fully implemented in a much shorter time and at lower cost than if a similar network was developed using a proprietary method.

  12. CarSafe: A Driver Safety App that Detects Dangerous Driving Behavior using Dual-Cameras on Smartphones

    E-Print Network [OSTI]

    Campbell, Andrew T.

    CarSafe: A Driver Safety App that Detects Dangerous Driving Behavior using Dual}@cs.dartmouth.edu ABSTRACT Driving while being tired or distracted is dangerous. We are developing the CafeSafe app on the phone to detect and alert drivers to dangerous driving conditions inside and outside the car. Car

  13. 1 Managed by UT-Battelle for the U.S. Department of Energy Global and regional drivers of

    E-Print Network [OSTI]

    1 Managed by UT-Battelle for the U.S. Department of Energy Global and regional drivers to climate change #12;2 Managed by UT-Battelle for the U.S. Department of Energy Global and regional drivers

  14. Abstract--There are two types of drivers in production machine systems: constant velocity (CV) motor and servo-motor.

    E-Print Network [OSTI]

    Zhang, WJ "Chris"

    ) motor and servo-motor. If a system contains two drivers or more, among which some are of the CV motor while the other are the servo-motor, the system has the so-called hybrid driver architecture is stable. A simulation is performed to show verify the proposed controller. The CV motor has the velocity

  15. Gas Feedback on Stellar Bar Evolution

    E-Print Network [OSTI]

    Ingo Berentzen; Isaac Shlosman; Inma Martinez-Valpuesta; Clayton Heller

    2007-05-27T23:59:59.000Z

    We analyze evolution of live disk-halo systems in the presence of various gas fractions, f_gas less than 8% in the disk. We addressed the issue of angular momentum (J) transfer from the gas to the bar and its effect on the bar evolution. We find that the weakening of the bar, reported in the literature, is not related to the J-exchange with the gas, but is caused by the vertical buckling instability in the gas-poor disks and by a steep heating of a stellar velocity dispersion by the central mass concentration (CMC) in the gas-rich disks. The gas has a profound effect on the onset of the buckling -- larger f_gas brings it forth due to the more massive CMCs. The former process leads to the well-known formation of the peanut-shaped bulges, while the latter results in the formation of progressively more elliptical bulges, for larger f_gas. The subsequent (secular) evolution of the bar differs -- the gas-poor models exhibit a growing bar while gas-rich models show a declining bar whose vertical swelling is driven by a secular resonance heating. The border line between the gas-poor and -rich models lies at f_gas ~ 3% in our models, but is model-dependent and will be affected by additional processes, like star formation and feedback from stellar evolution. The overall effect of the gas on the evolution of the bar is not in a direct J transfer to the stars, but in the loss of J by the gas and its influx to the center that increases the CMC. The more massive CMC damps the vertical buckling instability and depopulates orbits responsible for the appearance of peanut-shaped bulges. The action of resonant and non-resonant processes in gas-poor and gas-rich disks leads to a converging evolution in the vertical extent of the bar and its stellar dispersion velocities, and to a diverging evolution in the bulge properties.

  16. Development and Verification of a Truck Driving Simulator for Driver Drowsiness Studies

    E-Print Network [OSTI]

    Vertes, Akos

    environment. The control of simulation conditions in a driving simulator allows independent study of driving) and the Modeling, Simulation and Driving Simulators (MSIS) research unit of the French National Institute Steering torque feedback

  17. Delayed feedback control of fractional-order chaotic systems

    E-Print Network [OSTI]

    Aleksandar Gjurchinovski; Trifce Sandev; Viktor Urumov

    2011-07-06T23:59:59.000Z

    We study the possibility to stabilize unstable steady states and unstable periodic orbits in chaotic fractional-order dynamical systems by the time-delayed feedback method. By performing a linear stability analysis, we establish the parameter ranges for successful stabilization of unstable equilibria in the plane parametrizad by the feedback gain and the time delay. An insight into the control mechanism is gained by analyzing the characteristic equation of the controlled system, showing that the control scheme fails to control unstable equilibria having an odd number of positive real eigenvalues. We demonstrate that the method can also stabilize unstable periodic orbits for a suitable choice of the feedback gain, providing that the time delay is chosen to coincide with the period of the target orbit. In addition, it is shown numerically that delayed feedback control with a sinusoidally modulated time delay significantly enlarges the stability region of the steady states in comparison to the classical time-delayed feedback scheme with a constant delay.

  18. Feedback effects of aspherical supernovae explosions on galaxies

    E-Print Network [OSTI]

    Bekki, Kenji; Tsujimoto, Takuji

    2012-01-01T23:59:59.000Z

    We investigate how explosions of aspherical supernovae (A-SNe) can influence star formation histories and chemical evolution of dwarf galaxies by using a new chemodynamical model. We mainly present the numerical results of two comparative models so that the A-SN feedback effects on galaxies can be more clearly seen. SNe originating from stars with masses larger than 30M_sun are A-SNe in the "ASN" model whereas all SNe are spherical ones (S-SNe) in the "SSN" model. Each S-SN and A-SN are assumed to release feedback energy of 10^{51} erg and 10^{52} erg, respectively, and chemical yields and feedback energy of A-SN ejecta depend on angles between the axis of symmetry and the ejection directions. We find that star formation can become at least by a factor of ~3 lower in the ASN model in comparison with the SSN one owing to the more energetic feedback of A-SNe. As a result of this, chemical evolution can proceed very slowly in the ASN model. A-SN feedback effects can play a significant role in the formation of gi...

  19. Coherent versus measurement feedback: Linear systems theory for quantum information

    E-Print Network [OSTI]

    Naoki Yamamoto

    2014-10-10T23:59:59.000Z

    To control a quantum system via feedback, we generally have two options in choosing control scheme. One is the coherent feedback, which feeds the output field of the system, through a fully quantum device, back to manipulate the system without involving any measurement process. The other one is the measurement-based feedback, which measures the output field and performs a real-time manipulation on the system based on the measurement results. Both schemes have advantages/disadvantages, depending on the system and the control goal, hence their comparison in several situation is important. This paper considers a general open linear quantum system with the following specific control goals; back-action evasion (BAE), generation of a quantum non-demolished (QND) variable, and generation of a decoherence-free subsystem (DFS), all of which have important roles in quantum information science. Then some no-go theorems are proven, clarifying that those goals cannot be achieved by any measurement-based feedback control. On the other hand it is shown that, for each control goal, there exists a coherent feedback controller accomplishing the task. The key idea to obtain all the results is system theoretic characterizations of BAE, QND, and DFS in terms of controllability and observability properties or transfer functions of linear systems, which are consistent with their standard definitions.

  20. ULTRAFAST OUTFLOWS: GALAXY-SCALE ACTIVE GALACTIC NUCLEUS FEEDBACK

    SciTech Connect (OSTI)

    Wagner, A. Y.; Umemura, M. [Center for Computational Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577 (Japan); Bicknell, G. V., E-mail: ayw@ccs.tsukuba.ac.jp [Research School of Astronomy and Astrophysics, Australian National University, ACT 2611 (Australia)

    2013-01-20T23:59:59.000Z

    We show, using global three-dimensional grid-based hydrodynamical simulations, that ultrafast outflows (UFOs) from active galactic nuclei (AGNs) result in considerable feedback of energy and momentum into the interstellar medium (ISM) of the host galaxy. The AGN wind interacts strongly with the inhomogeneous, two-phase ISM consisting of dense clouds embedded in a tenuous, hot, hydrostatic medium. The outflow floods through the intercloud channels, sweeps up the hot ISM, and ablates and disperses the dense clouds. The momentum of the UFO is primarily transferred to the dense clouds via the ram pressure in the channel flow, and the wind-blown bubble evolves in the energy-driven regime. Any dependence on UFO opening angle disappears after the first interaction with obstructing clouds. On kpc scales, therefore, feedback by UFOs operates similarly to feedback by relativistic AGN jets. Negative feedback is significantly stronger if clouds are distributed spherically rather than in a disk. In the latter case, the turbulent backflow of the wind drives mass inflow toward the central black hole. Considering the common occurrence of UFOs in AGNs, they are likely to be important in the cosmological feedback cycles of galaxy formation.

  1. UA researchers develop develop a device for moving industrial vehicles without drivers

    E-Print Network [OSTI]

    Escolano, Francisco

    in settings with extreme human conditions (cold storage, waste management , etc....) The device is availableUA researchers develop develop a device for moving industrial vehicles without drivers Researchers Localization And Mapping). This technology is applicable to any business or industrial environment where

  2. Design and characterization of a signal insulation coreless transformer integrated in a CMOS gate driver chip

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Design and characterization of a signal insulation coreless transformer integrated in a CMOS gate the implementation of numerous distinct power transistor gate drivers, the control signal insulation is becoming more results will be shown in order to validate the functionality. I. INTRODUCTION An insulation system

  3. Stochastic Behaviour of the Electricity Bid Stack: from Fundamental Drivers to Power Prices

    E-Print Network [OSTI]

    Howison, Sam

    Stochastic Behaviour of the Electricity Bid Stack: from Fundamental Drivers to Power Prices Michael@maths.ox.ac.uk (01865 280613) Sam Howison Oxford-Man Institute, University of Oxford, Blue Boar Court, 9 Alfred Street on stochastic processes for underlying factors (fuel prices, power demand and generation capacity availability

  4. Refueling Behavior of Flexible Fuel Vehicle Drivers in the Federal Fleet

    SciTech Connect (OSTI)

    Daley, R.; Nangle, J.; Boeckman, G.; Miller, M.

    2014-05-01T23:59:59.000Z

    Federal fleets are a frequent subject of legislative and executive efforts to lead a national transition to alternative fuels and advanced vehicle technologies. Section 701 of the Energy Policy Act of 2005 requires that all dual-fueled alternative fuel vehicles in the federal fleet be operated on alternative fuel 100% of the time when they have access to it. However, in Fiscal Year (FY) 2012, drivers of federal flex fuel vehicles (FFV) leased through the General Services Administration refueled with E85 24% of the time when it was available--falling well short of the mandate. The U.S. Department of Energy's National Renewable Energy Laboratory completed a 2-year Laboratory Directed Research and Development project to identify the factors that influence the refueling behavior of federal FFV drivers. The project began with two primary hypotheses. First, information scarcity increases the tendency to miss opportunities to purchase E85. Second, even with perfect information, there are limits to how far drivers will go out of their way to purchase E85. This paper discusses the results of the project, which included a June 2012 survey of federal fleet drivers and an empirical analysis of actual refueling behavior from FY 2009 to 2012. This research will aid in the design and implementation of intervention programs aimed at increasing alternative fuel use and reducing petroleum consumption.

  5. A fuel economy optimization system with applications in vehicles with human drivers and autonomous vehicles

    E-Print Network [OSTI]

    Wu, Changxu (Sean)

    A fuel economy optimization system with applications in vehicles with human drivers and autonomous University of New York, Buffalo, USA a r t i c l e i n f o Keywords: Vehicle fuel economy Eco-driving Human developed and validated a new fuel-economy optimization system (FEOS), which receives input from vehicle

  6. IMPACT OF BEAM TRANSPORT METHOD ON CHAMBER AND DRIVER DESIGN FOR

    E-Print Network [OSTI]

    IMPACT OF BEAM TRANSPORT METHOD ON CHAMBER AND DRIVER DESIGN FOR HEAVY ION INERTIAL FUSION ENERGY D propagate in thick-liquid-wall, wetted-wall, and dry-wall chambers. KEYWORDS: heavy ion fusion, ion beam transport, reactor chamber design I. INTRODUCTION The U.S. heavy ion fusion ~HIF! program is working toward

  7. DRIVER ASSISTED CONTROL STRATEGIES: THEORY AND EXPERIMENT Mark DePoorter

    E-Print Network [OSTI]

    Brennan, Sean

    performance is specified as a Reference Model. The driver maintains nominal control of the vehicle by direct actuation of the front steering inputs. The controller then determines the appropriate rear steer inputs. An appropriate vehicle model is developed and a polynomial pole placement technique is used to control

  8. Megafauna biomass tradeoff as a driver of Quaternary and future extinctions

    E-Print Network [OSTI]

    California at Berkeley, University of

    Megafauna biomass tradeoff as a driver of Quaternary and future extinctions Anthony D. Barnosky,000 and 3,000 years ago. Estimates of megafauna biomass (including hu- mans as a megafauna species) for before, during, and after the extinction episode suggest that growth of human biomass largely matched

  9. Multimodal Presentation of Local Danger Warnings for Drivers: A Situation-Dependent Assessment of Usability

    E-Print Network [OSTI]

    Theune, Mariët

    Multimodal Presentation of Local Danger Warnings for Drivers: A Situation-Dependent Assessment danger warning function. To achieve high-quality assistance, the communication mode needs to be adaptive. Moreover, regardless of communication mode, the local danger warning function was considered as the most

  10. Hydrology as a driver of biodiversity: Controls on carrying capacity, niche formation, and dispersal

    E-Print Network [OSTI]

    Konar, Megan

    Hydrology as a driver of biodiversity: Controls on carrying capacity, niche formation Centre for Hydrology, ``Dino Tonini'', Padua, Italy a r t i c l e i n f o Article history: Available online 3 March 2012 Keywords: Hydrology Biodiversity Dispersal Carrying capacity Niches Climate change

  11. 2002-21-0041 Performance Driver Information Systems, Enhancing the Fun-to-Drive Equation

    E-Print Network [OSTI]

    in automobiles today display vehicle speed, fluid levels, fluid temperatures, and some basic diagnostic information (warnings, panel lamps). Optional driver information systems add to this list by offering fuel to be very complex. Essentially, all that is required is a speedometer and a fuel gauge. The speedometer

  12. A method for calibration of bone driver transducers to measure the mastoid Reggie Weece a

    E-Print Network [OSTI]

    Allen, Jont

    2010 Available online xxxx a b s t r a c t When using bone vibrator transducers for clinical a circuit model of the driver, describing it with three frequency-dependent parameters. Once these three circuit model is proposed to better capture the observed behaviors. Ã? 2010 Published by Elsevier B.V. 1

  13. Offshore Wind Turbine Design: Addressing Uncertainty Drivers Sten Frandsen Niels Jacob Tarp-Johansen

    E-Print Network [OSTI]

    the next generation of offshore wind farms are designed. The aim of this paper is to discuss existingOffshore Wind Turbine Design: Addressing Uncertainty Drivers Sten Frandsen Niels Jacob Tarp@civil.auc.dk leje@elsam-eng.com Abstract: Current offshore wind turbine design methods have matured to a 1st

  14. An investigation of driver behavior at highway-railroad grade crossings

    E-Print Network [OSTI]

    Shull, Lee Anne

    1996-01-01T23:59:59.000Z

    crossing results, in that the presence of a crossing (rather than the presence of a train) is indicated by the location of the crossbucks. The driver is ultimately responsible for achieving safe passage across a passive crossing because no warning devices...

  15. Young drivers and the efficacy of the Texas drug and alcohol driving awareness program

    E-Print Network [OSTI]

    Darnell, Richard

    2009-05-15T23:59:59.000Z

    The purpose of this study was to examine the efficacy of the Texas Drug and Alcohol Driving Awareness Program (TDADAP) in relation to alcohol-related offenses among young drivers. Participants in this study were students in pre-license programs...

  16. What kind of charging infrastructure do Chevrolet Volts Drivers in The EV Project use?

    SciTech Connect (OSTI)

    John Smart

    2013-09-01T23:59:59.000Z

    This report summarizes key conclusions from analysis of data collected from Chevrolet Volts participating in The EV Project. Topics include how much Volt drivers charge at level 1 vs. level 2 rates and how much they charge at home vs. away from home.

  17. Perception Drivers for Treated Wood by U.S. South Homebuilders and Remodelers

    E-Print Network [OSTI]

    Wu, Qinglin

    Perception Drivers for Treated Wood by U.S. South Homebuilders and Remodelers Sanna M. Kallioranta1 for the use of treated wood products in construction is considerable, especially in the U.S. South for termite protection and to mitigate moisture related decay. This research investigates the perception about treated

  18. Evolution styles: using architectural knowledge as an evolution driver Carlos E. Cuesta1

    E-Print Network [OSTI]

    Perry, Dewayne E.

    Evolution styles: using architectural knowledge as an evolution driver Carlos E. Cuesta1 , Elena+D, 02006, Albacete, Spain ABSTRACT Software evolution is an increasingly challenging and compelling concern software evolution is carried out, software architecture emerges as one of the cornerstones that should

  19. Evolution on a Restless Planet: Were Environmental Variability and Environmental Change Major Drivers of Human Evolution?

    E-Print Network [OSTI]

    Richerson, Peter J.

    223 7 Evolution on a Restless Planet: Were Environmental Variability and Environmental Change Major Drivers of Human Evolution? Peter J. Richerson, Robert L. Bettinger, and Robert Boyd 7.1 Introduction Two kinds of factors set the tempo and direction of organic and cultural evolution, those external to biotic

  20. Setup, tests and results for the ATLAS TileCal Read Out Driver production

    E-Print Network [OSTI]

    Valero, Alberto; Castillo, V; Cuenca, C; Ferrer, A; Fullana, E; González, V; Higón, E; Munar, A; Poveda, J; Ruiz-Martínez, A; Salvachúa, B; Sanchís, E; Solans, C; Soret, J; Torres, J; Valls, J A

    2007-01-01T23:59:59.000Z

    In this paper we describe the performance and test results of the production of the 38 ATLAS TileCal Read Out Drivers (RODs). We first describe the basic hardware specifications and firmware functionality of the modules, the test-bench setup used for production and the test procedure to qualify the boards. We then finally show and discuss the performance results.

  1. HIGH INTENSITY LINAC DRIVER FOR THE SPIRAL-2 PROJECT : DESIGN OF SUPERCONDUCTING 88 MHZ QUARTER WAVE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . For the high-energy section of the linac, a superconducting 88 MHz Quarter Wave Resonator (beta 0.12) has been WAVE RESONATORS (BETA 0.12), POWER COUPLERS AND CRYOMODULES T. Junquera, G. Olry, H. Saugnac, J Abstract A superconducting linac driver, delivering deuterons with an energy up to 40 MeV (5 mA) and heavy

  2. Using Vision-Based Driver Assistance to Augment Vehicular Ad-Hoc Network Communication

    E-Print Network [OSTI]

    Beauchemin, Steven S.

    a Vision-Based Driver Assistance (VBDA) system that monitors the environment surrounding the vehicle using in the surrounding environment. The concept of a CCWS has been introduced, studied and validated by a number adoption of the Wireless Access in Vehicular Environments (WAVE) set of standards in production vehicles

  3. Powerful Outflows and Feedback from Active Galactic Nuclei

    E-Print Network [OSTI]

    King, Andrew

    2015-01-01T23:59:59.000Z

    Active Galactic Nuclei (AGN) represent the growth phases of the supermassive black holes in the center of almost every galaxy. Powerful, highly ionized winds, with velocities $\\sim 0.1- 0.2c$ are a common feature in X--ray spectra of luminous AGN, offering a plausible physical origin for the well known connections between the hole and properties of its host. Observability constraints suggest that the winds must be episodic, and detectable only for a few percent of their lifetimes. The most powerful wind feedback, establishing the $M -\\sigma$ relation, is probably not directly observable at all. The $M - \\sigma$ relation signals a global change in the nature of AGN feedback. At black hole masses below $M-\\sigma$ feedback is confined to the immediate vicinity of the hole. At the $M-\\sigma$ mass it becomes much more energetic and widespread, and can drive away much of the bulge gas as a fast molecular outflow.

  4. Protoplanetary disks including radiative feedback from accreting planets

    E-Print Network [OSTI]

    Montesinos, Matias; Perez, Sebastian; Baruteau, Clement; Casassus, Simon

    2015-01-01T23:59:59.000Z

    While recent observational progress is converging on the detection of compact regions of thermal emission due to embedded protoplanets, further theoretical predictions are needed to understand the response of a protoplanetary disk to the planet formation radiative feedback. This is particularly important to make predictions for the observability of circumplanetary regions. In this work we use 2D hydrodynamical simulations to examine the evolution of a viscous protoplanetary disk in which a luminous Jupiter-mass planet is embedded. We use an energy equation which includes the radiative heating of the planet as an additional mechanism for planet formation feedback. Several models are computed for planet luminosities ranging from $10^{-5}$ to $10^{-3}$ Solar luminosities. We find that the planet radiative feedback enhances the disk's accretion rate at the planet's orbital radius, producing a hotter and more luminous environement around the planet, independently of the prescription used to model the disk's turbul...

  5. Cloud and Star Formation in Disk Galaxy Models with Feedback

    E-Print Network [OSTI]

    Rahul Shetty; Eve C. Ostriker

    2008-05-26T23:59:59.000Z

    We include feedback in global hydrodynamic simulations in order to study the star formation properties, and gas structure and dynamics, in models of galactic disks. We extend previous models by implementing feedback in gravitationally bound clouds: momentum is injected at a rate proportional to the star formation rate. This mechanical energy disperses cloud gas back into the surrounding ISM, truncating star formation in a given cloud, and raising the overall level of ambient turbulence. Propagating star formation can however occur as expanding shells collide, enhancing the density and triggering new cloud and star formation. By controlling the momentum injection per massive star and the specific star formation rate in dense gas, we find that the negative effects of high turbulence outweigh the positive ones, and in net feedback reduces the fraction of dense gas and thus the overall star formation rate. The properties of the large clouds that form are not, however, very sensitive to feedback, with cutoff masses of a few million solar masses, similar to observations. We find a relationship between the star formation rate surface density and the gas surface density with a power law index ~2 for our models with the largest dynamic range, consistent with theoretical expectations for our model of disk flaring. We point out that the value of the "Kennicutt-Schmidt" index depends on the thickness of the disk. With our simple feedback prescription (a single combined star formation event per cloud), we find that global spiral patterns are not sustained; less correlated feedback and smaller scale turbulence appear to be necessary for spiral patterns to persist.

  6. Feedback-controlled transport in an interacting colloidal system

    E-Print Network [OSTI]

    Ken Lichtner; Sabine H. L. Klapp

    2010-11-03T23:59:59.000Z

    Based on dynamical density functional theory (DDFT) we consider a non-equilibrium system of interacting colloidal particles driven by a constant tilting force through a periodic, symmetric "washboard" potential. We demonstrate that, despite of pronounced spatio-temporal correlations, the particle current can be reversed by adding suitable feedback control terms to the DDFT equation of motion. We explore two distinct control protocols with time delay, focussing on either the particle positions or the density profile. Our study shows that the DDFT is an appropriate framework to implement time-delayed feedback control strategies widely used in other fields of nonlinear physics

  7. Feedback control of the squeezing of the fluorescence light

    E-Print Network [OSTI]

    Alberto Barchielli; Matteo Gregoratti

    2009-10-09T23:59:59.000Z

    Among the formulations of the theory of quantum measurements in continuous time, quantum trajectory theory is very suitable for the introduction of measurement based feedback and closed loop control of quantum systems. In this paper we present such a construction in the concrete case of a two-level atom stimulated by a coherent, monochromatic laser. In particular, we show how fast feedback \\`a la Wiseman and Milburn can be introduced in the formulation of the theory. Then, the spectrum of the free fluorescence light is studied and typical quantum phenomena, squeezing and sub-natural line-narrowing, are presented.

  8. Optimal Unravellings for Feedback Control in Linear Quantum Systems

    E-Print Network [OSTI]

    H. M . Wiseman; A. C. Doherty

    2005-02-26T23:59:59.000Z

    For quantum systems with linear dynamics in phase space much of classical feedback control theory applies. However, there are some questions that are sensible only for the quantum case, such as: given a fixed interaction between the system and the environment what is the optimal measurement on the environment for a particular control problem? We show that for a broad class of optimal (state-based) control problems (the stationary Linear-Quadratic-Gaussian class), this question is a semi-definite program. Moreover, the answer also applies to Markovian (current-based) feedback.

  9. Feedback control of major disruptions in International Thermonuclear Experimental Reactor

    SciTech Connect (OSTI)

    Sen, A. K. [Plasma Physics Laboratory, Columbia University, New York, New York 10026 (United States)

    2011-08-15T23:59:59.000Z

    It is argued that major disruptions in ITER can be avoided by the feedback control of the causative MHD precursors. The sensors will be 2D-arrays of ECE detectors and the suppressors will be modulated ECH beams injected radially to produce non-thermal radial pressures to counter the radial dynamics of MHD modes. The appropriate amplitude and phase of this signal can stabilize the relevant MHD modes and prevent their evolution to a major disruption. For multimode MHD precursors, an optimal feedback scheme with a Kalman filter is discussed.

  10. Teaching Feedback to First-year Medical Students: Long-term Skill Retention and Accuracy of Student Self-assessment

    E-Print Network [OSTI]

    Kruidering-Hall, Marieke; O’Sullivan, Patricia S.; Chou, Calvin L.

    2009-01-01T23:59:59.000Z

    DK. Oral versus written feedback in medical clinic. J Gen2002; 77(12):1185–8. 3. Ende J. Feedback in clinical medicalWC, ten Cate OTJ. What is feedback in clinical education.

  11. An Evaluation of the Interactive Effects of Feedback Sequence and Timing on Efficacy and Preference

    E-Print Network [OSTI]

    Henley, Amy Jessica

    2014-05-31T23:59:59.000Z

    Feedback is an effective method for increasing employee performance in a wide range of settings, although questions remain regarding the most effective characteristics of feedback. Despite the fact that there is little research on the sequence...

  12. Feedback vertex sets and disjoint cycles in planar (di)graphs

    E-Print Network [OSTI]

    graph has a feedback vertex set of cardinality at most k then its treewidth. is bounded ... in linear time, and this is used to nd an algorithm computing a feedback.

  13. RFI Seeks Feedback on Third-party Maintenance Strategy for AMO...

    Energy Savers [EERE]

    RFI Seeks Feedback on Third-party Maintenance Strategy for AMO's Software Tools RFI Seeks Feedback on Third-party Maintenance Strategy for AMO's Software Tools July 28, 2014 -...

  14. The role of linguistic contrasts in the auditory feedback control of Speech

    E-Print Network [OSTI]

    Niziolek, Caroline A

    2010-01-01T23:59:59.000Z

    Speakers use auditory feedback to monitor their own speech, ensuring that the intended output matches the observed output. By altering the acoustic feedback signal before it reaches the speaker's ear, we can induce auditory ...

  15. Iterated Learning with Human subjects: adding communication and feedback 

    E-Print Network [OSTI]

    Murray, Laura

    2010-11-24T23:59:59.000Z

    with no intentional design on behalf of the subject. However, filtering for homonymy was necessary to produce a language that adapted to be learnable by becoming more structured and expressive. What I proposed was to introduce communication and feedback to investigate...

  16. ISM dust feedback from low to high mass stars

    E-Print Network [OSTI]

    Falceta-Goncalves; D.

    2007-10-26T23:59:59.000Z

    The dust component of the interstellar medium (ISM) has been extensively studied in the past decades. Late-type stars have been assumed as the main source of dust to the ISM, but recent observations show that supernova remnants may play a role on the ISM dust feedback. In this work, I study the importance of low and high mass stars, as well as their evolutionary phase, on the ISM dust feedback process. I also determine the changes on the obtained results considering different mass distribution functions and star formation history. We describe a semi-empirical calculation of the relative importance of each star at each evolutionary phase in the dust ejection to the ISM. I compare the obtained results for two stellar mass distribution functions, the classic Salpeter initial mass function and the present day mass function. I used the evolutionary track models for each stellar mass, and the empirical mass-loss rates and dust-to-gas ratio. The relative contribution of each stellar mass depends on the used distribution. Ejecta from massive stars represent the most important objects for the ISM dust replenishment using the Salpeter IMF. On the other hand, for the present day mass function low and intermediate mass stars are dominant. Late-type giant and supergiant stars dominate the ISM dust feedback in our actual Galaxy, but this may not the case of galaxies experiencing high star formation rates, or at high redshifts. In those cases, SNe are dominant in the dust feedback process.

  17. Distributed Precoding for MISO Interference Channels with Channel Mean Feedback

    E-Print Network [OSTI]

    Ulukus, Sennur

    Distributed Precoding for MISO Interference Channels with Channel Mean Feedback: Algorithms precoding algorithms for multiple-input single-output (MISO) interference channels, where each trans- mitter- antenna wireless interference channels [5]-[7]. For multiple- input single-output (MISO) interference

  18. Nonlinear Flight Control Using Neural Networks and Feedback Linearization

    E-Print Network [OSTI]

    Nonlinear Flight Control Using Neural Networks and Feedback Linearization Byoung So0 Kim1, Anthony approaches to aircraft flight control involve linearization of these dynamicsabout a set of pre eliminate many of the undesirable features of linear control. Control of nonlinear systems by inverting

  19. On Optimal Distributed Output-Feedback Control over Acyclic Graphs

    E-Print Network [OSTI]

    Gattami, Ather

    2012-01-01T23:59:59.000Z

    In this paper, we consider the problem of distributed optimal control of linear dynamical systems with a quadratic cost criterion. We study the case of output feedback control for two interconnected dynamical systems, and show that the linear optimal solution can be obtained from a combination of two uncoupled Riccati equations and two coupled Riccati equations.

  20. Robust Measurement Feedback Control of an Inclined Cable

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    a robust control strategy based on modern control tools for distributed parameter systems, hal-00784727 on the construction of a standard linear infinite dimensional state space system and an H feedback control). !"#$%& # ' ( )"#$%& "*++$!++&, - *. , , Fig. 1. Inclined Cable This paper is devoted to the design of control laws for a vi- brating system

  1. INVITED SESSION NUMBER: 157 Event-Based Feedback Control

    E-Print Network [OSTI]

    Moehlis, Jeff

    . INTRODUCTION Symptoms of neuromotor disorders, such as Parkinson's Disease (PD), have been linked-compulsive disorder, and even depression [1]. Since its approval by the FDA in 1997 for use in advanced cases of PD models, that are each equipped with both a stimulus and feedback electrode. We seek to develop a control

  2. Ecosystem feedbacks arising from wind transport in drylands: Results

    E-Print Network [OSTI]

    Ecosystem feedbacks arising from wind transport in drylands: Results from field experiments fire frequency Woody mortality Introduction of exotic grasses Is cover dominated by annuals or short intensity precipitation Low wind speeds Low P/PE High variability High intensity precipitation High wind

  3. Feedback damper system for quadrupole oscillations after transition at RHIC.

    SciTech Connect (OSTI)

    Abreu,N.; Blaskiewicz, M.; Brennan, J.M.; Schultheiss, C.

    2008-06-23T23:59:59.000Z

    The heavy ion beam at RHIC undergoes strong quadrupole oscillations just after it crosses transition, which leads to an increase in bunch length making rebucketing less effective. A feedback system was built to damp these quadrupole oscillations and in this paper the characteristics of the system and the results obtained are presented and discussed.

  4. KEYNOTE PAPER Principles of good assessment and feedback

    E-Print Network [OSTI]

    Azzopardi, Leif

    KEYNOTE PAPER Principles of good assessment and feedback: Theory and practice David Nicol for the theory and practice of assessment in higher education. It presents 10 principles of good assessment underpinning good assessment practice in higher education. In one paper, I (with a colleague) formulated seven

  5. Design and implementation of the feedback systems Web laboratory

    E-Print Network [OSTI]

    Viedma Núñez, Gerardo

    2005-01-01T23:59:59.000Z

    This thesis describes the design and implementation of a remote web-based laboratory (WebLab) for MIT's 6.302 Feedback Systems course. The WebLab system proposed consists of a three-tiered architecture where client and ...

  6. Multi-Query Feedback Motion Planning with LQR-Roadmaps

    E-Print Network [OSTI]

    Jackson, Daniel

    Multi-Query Feedback Motion Planning with LQR-Roadmaps Anirudha Majumdar School of Engineering "roadmap", with each segment representing a locally optimal trajectory of the system and a continuous) - and for parameterized finite-time invariance around a trajectory, as well as a "roadmap" construction al- gorithm

  7. How Can I Say This? giving feedback at the rca

    E-Print Network [OSTI]

    Subramanian, Sriram

    on their minds than teaching and learning. At those times it may be best practice to reschedule meetings decisions for themselves. For example, a piece of work may need moving on in response to previous feedback or encouragement, but of the decision or answer, even when the student demands it. I'm confident that my students

  8. Does Beamforming achieve Outage Capacity with Direction Feedback?

    E-Print Network [OSTI]

    Jafar, Syed A.

    Does Beamforming achieve Outage Capacity with Direction Feedback? Sudhir Srinivasa and Syed Ali Jafar Sriram Vishwanath Electrical Engineering and Computer Science Electrical and Computer Engineering: syed@ece.uci.edu, sudhirs@uci.edu Email: sriram@ece.utexas.edu Abstract We explore the outage capacity

  9. MATH43032/63032, May 2014 Exam, and Feedback

    E-Print Network [OSTI]

    Sidorov, Nikita

    MATH43032/63032, May 2014 Exam, Solutions1 and Feedback Solutions A1. |s i si S = or i si S = and for the least such i, si S S. The Representation Theorem for Rational Consequence Relations: Every ra- tional are more detailed than I would expect in the exam. That's because I want them to also serve an educational

  10. The Design of Eco-Feedback Technology Jon Froehlich1

    E-Print Network [OSTI]

    Anderson, Richard

    behaviors with a goal of reducing environmental impact. The history of eco-feedback extends back more than environmental impact (adapted from [39] and [28], see Figure 1 for examples). Despite this goal, few HCI eco 40 years to the origins of environmental psychology. Despite its stated purpose, few HCI eco

  11. Robust Path Planning and Feedback Design under Stochastic Uncertainty

    E-Print Network [OSTI]

    Williams, Brian C.

    . Introduction Autonomous vehicles such as Unmanned Air Vehicles (UAVs) need to be able to plan trajectories; prior work showed that a UAV operating at a constant altitude as well as other autonomous vehicles canRobust Path Planning and Feedback Design under Stochastic Uncertainty Lars Blackmore Autonomous

  12. Providing Intelligent Language Feedback for Augmentative Communication Users

    E-Print Network [OSTI]

    McCoy, Kathleen F.

    . Pennington and Kathleen F. McCoy Applied Science and Engineering Laboratories Department of ComputerProviding Intelligent Language Feedback for Augmentative Communication Users Christopher A and Information Sciences University of Delaware duPont Hospital for Children Wilmington, DE 19899 penningt

  13. Providing Intelligent Language Feedback for Augmentative Communication Users

    E-Print Network [OSTI]

    McCoy, Kathleen F.

    . Pennington and Kathleen F. McCoy Applied Science and Engineering Laboratories Department of ComputerProviding Intelligent Language Feedback for Augmentative Communication Users Christopher A and Information Sciences University of Delaware / duPont Hospital for Children Wilmington, DE 19899 penningt

  14. Fire Feedbacks with Vegetation and Alternative Stable States

    E-Print Network [OSTI]

    Beckage, Brian

    landscape composition and that (ii) hurricane disturbances can mediate the frequency of fire that leads frequency. Our results indicate that gradual changes in global climate that influence disturbance frequency.Beckage@uvm.edu Positive feedbacks between vegetation and fire disturbance may lead to nonlinear ecosystem responses

  15. ORIGINAL PAPER Hunter feedback of individually marked wild boar

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ORIGINAL PAPER Hunter feedback of individually marked wild boar Sus scrofa L.: dispersal 2009 # Springer-Verlag 2009 Abstract Increasing wild boar (Sus scrofa L.) population densities all over of wild boar in southwestern Mecklenburg-Western Pomerania. From 152 marked wild boar, 105 have been

  16. Electrooptic light modulator with improved response linearity using optical feedback

    E-Print Network [OSTI]

    Bhatranand, Apichai

    2005-11-01T23:59:59.000Z

    to 71.83 dB, limited by third-order nonlinearity. In tests at constant modulation depth, an improvement of as much as 9.6 dB in SFDR vs. the theoretical value for an interferometric modulator without feedback was achieved....

  17. Augmenting Future In-Vehicle Interactions With Remote Tactile Feedback

    E-Print Network [OSTI]

    . Nowadays, also many controllers for in-vehicle information systems such as BMW's iDrive1 are equipped of tactile stimuli could help here. 1 www.bmw.com AutoUI`11, Workshop on Natural User Interfaces, 30th environment. Similar to direct tactile stimuli, the remote application of feedback on touch surfaces has

  18. PPPL-3242 -Preprint: March 1997, UC-427 TSC Simulation of Feedback Stabilization of

    E-Print Network [OSTI]

    of the equilibrium shaping coils. The feedback electrical currents in these coils are driven by applying a voltage

  19. RESEARCH Open Access The role of feed-forward and feedback processes

    E-Print Network [OSTI]

    Vijayakumar, Sethu

    to amputees. Artificial feedback systems can exploit the idea of sen- sory substitution: feedback delivered with a closed-loop robotic hand and instructed to grasp and lift objects of different weights as we recorded the cognitive processes underlying grasping and lifting. We have shown quantitatively that tactile feedback can

  20. Monolithic amplifier with stable, high resistance feedback element and method for fabricating the same

    DOE Patents [OSTI]

    O'Connor, Paul (Bellport, NY)

    1998-08-11T23:59:59.000Z

    A monolithic amplifier includes a stable, high resistance feedback circuit and a dynamic bias circuit. The dynamic bias circuit is formed with active elements matched to those in the amplifier and feedback circuit to compensate for variations in the operating and threshold voltages thereby maintaining a stable resistance in the feedback circuit.

  1. Joint Power Control and Beamforming Codebook Design for MISO Channels with Limited Feedback

    E-Print Network [OSTI]

    Yu, Wei

    Joint Power Control and Beamforming Codebook Design for MISO Channels with Limited Feedback Behrouz-input single-output (MISO) wireless systems with a rate-limited feedback link. The problem is cast in the form-output (MISO) channel with channel state information at the receiver (CSIR) and a noiseless delay-free feedback

  2. Controller design issues in the feedback control of radio frequency plasma processing reactors

    E-Print Network [OSTI]

    Kushner, Mark

    Controller design issues in the feedback control of radio frequency plasma processing reactors feedback control of inductively coupled plasma processing reactors for polysilicon etching and be successfully used for feedback control of plasma processing reactors.4 There are many control strate- gies

  3. Monolithic amplifier with stable, high resistance feedback element and method for fabricating the same

    DOE Patents [OSTI]

    O`Connor, P.

    1998-08-11T23:59:59.000Z

    A monolithic amplifier includes a stable, high resistance feedback circuit and a dynamic bias circuit. The dynamic bias circuit is formed with active elements matched to those in the amplifier and feedback circuit to compensate for variations in the operating and threshold voltages thereby maintaining a stable resistance in the feedback circuit. 11 figs.

  4. Mitigation of resource competition in synthetic genetic circuits through feedback regulation

    E-Print Network [OSTI]

    Del Vecchio, Domitilla

    Mitigation of resource competition in synthetic genetic circuits through feedback regulation expression. In particular, we analyze and compare the ability of several inhibitory feedback regulation that arise in synthetic biology. Questions of how feedback regulation may be employed by biochemical systems

  5. Econometric Feedback for Runtime Risk Management in VoIP Architectures

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Econometric Feedback for Runtime Risk Management in VoIP Architectures Oussema Dabbebi, R at automatically adapting these parameters based on an econometric feedback mechanism. We mathematically describe the configuration of such risk models, by refining at runtime the model parameters based on an econometric feedback

  6. Development and Use of a Feedback Control System in Introducing Biotechnology Students to

    E-Print Network [OSTI]

    Allen, Gale

    departments at MSU Mankato. The air temperature near a small light bulb was controlled while the variables on the performance of the control loop. The air temperature near the bulb was monitored with a thermocouple producing conditioning amplifier Light bulb voltage driver Thermocouple and 12V automobile light bulb Light Bulb Driver

  7. Accounting for the Variation of Driver Aggression in the Simulation of Conventional and Advanced Vehicles

    SciTech Connect (OSTI)

    Neubauer, J.; Wood, E.

    2013-01-01T23:59:59.000Z

    Hybrid electric vehicles, plug-in hybrid electric vehicles, and battery electric vehicles offer the potential to reduce both oil imports and greenhouse gases, as well as to offer a financial benefit to the driver. However, assessing these potential benefits is complicated by several factors, including the driving habits of the operator. We focus on driver aggression, i.e., the level of acceleration and velocity characteristic of travel, to (1) assess its variation within large, real-world drive datasets, (2) quantify its effect on both vehicle efficiency and economics for multiple vehicle types, (3) compare these results to those of standard drive cycles commonly used in the industry, and (4) create a representative drive cycle for future analyses where standard drive cycles are lacking.

  8. Accounting for the Variation of Driver Aggression in the Simulation of Conventional and Advanced Vehicles: Preprint

    SciTech Connect (OSTI)

    Neubauer, J.; Wood, E.

    2013-03-01T23:59:59.000Z

    Hybrid electric vehicles, plug-in hybrid electric vehicles, and battery electric vehicles offer the potential to reduce both oil imports and greenhouse gases, as well as to offer a financial benefit to the driver. However, assessing these potential benefits is complicated by several factors, including the driving habits of the operator. We focus on driver aggression, i.e., the level of acceleration and velocity characteristic of travel, to (1) assess its variation within large, real-world drive datasets, (2) quantify its effect on both vehicle efficiency and economics for multiple vehicle types, (3) compare these results to those of standard drive cycles commonly used in the industry, and (4) create a representative drive cycle for future analyses where standard drive cycles are lacking.

  9. OPERATION AND COMMISSIONING OF THE JEFFERSON LAB UV FEL USING AN SRF DRIVER ERL

    SciTech Connect (OSTI)

    R. Legg; S. Benson; G. Biallas; K. Blackburn; J. Boyce; D. Bullard; J. Coleman; C. Dickover; D. Douglas; F. Ellingsworth; P. Evtushenko; F. Hannon; C. Hernandez-Garcia; C. Gould; J. Gubeli; D. Hardy; K. Jordan; M. Klopf; J. Kortze; M. Marchlik; W. Moore; G. Neil; T. Powers; D. Sexton; Michelle D. Shinn; C. Tennant; R. Walker; G. Wilson

    2011-03-01T23:59:59.000Z

    We describe the operation and commissioning of the Jefferson Lab UV FEL using a CW SRF ERL driver. Based on the same 135 MeV linear accelerator as the Jefferson Lab 10 kW IR Upgrade FEL, the UV driver ERL uses a bypass geometry to provide transverse phase space control, bunch length compression, and nonlinear aberration compensation necessitating a unique set of commissioning and operational procedures. Additionally, a novel technique to initiate lasing is described. To meet these constraints and accommodate a challenging installation schedule, we adopted a staged commissioning plan with alternating installation and operation periods. This report addresses these issues and presents operational results from on-going beam operations.

  10. Managing the Drivers of Air Flow and Water Vapor Transport in Existing Single Family Homes (Revised)

    SciTech Connect (OSTI)

    Cummings, J.; Withers, C.; Martin, E.; Moyer, N.

    2012-10-01T23:59:59.000Z

    This document focuses on managing the driving forces which move air and moisture across the building envelope. While other previously published Measure Guidelines focus on elimination of air pathways, the ultimate goal of this Measure Guideline is to manage drivers which cause air flow and water vapor transport across the building envelope (and also within the home), control air infiltration, keep relative humidity (RH) within acceptable limits, avoid combustion safety problems, improve occupant comfort, and reduce house energy use.

  11. Evaluation of four selected servo hand controls for severely handicapped drivers

    E-Print Network [OSTI]

    Sexton, Donna Jean

    1979-01-01T23:59:59.000Z

    OF SCIENCE December 1979 Major Subject: Industrial Engineering EVALUATION OF FOUR SELECTED SERVO HAND CONTROLS FOR SEVERELY HANDICAPPED DRIVERS A Thesis by DONNA JEAN SEXTON Approved as to style and content by: (Co-Chairman of Committee) (Co... CURRENT TRENDS IN AUTOMOTIVE ADAPTIVE CONTROLS Mechanical Adaptive Controls Power Assist Adaptive Controls Joystick Controls METHOD Subjects The Tracking Task Apparatus DATA REDUCTION Analog to Digital Conversion Data Cleanup Calculation...

  12. Studies of a Linac Driver for a High Repetition Rate X-Ray FEL

    SciTech Connect (OSTI)

    Venturini, M.; Corlett, J.; Doolittle, L.; Filippetto, D.; Papadopoulos, C.; Penn, G.; Prosnitz, D.; Qiang, J.; Reinsch, M.; Ryne, R.; Sannibale, F.; Staples, J.; Wells, R.; Wurtele, J.; Zolotorev, M.; Zholents, A.

    2011-06-01T23:59:59.000Z

    We report on on-going studies of a superconducting CW linac driver intended to support a high repetition rate FEL operating in the soft x-rays spectrum. We present a pointdesign for a 1.8 GeV machine tuned for 300 pC bunches and delivering low-emittance, low-energy spread beams as needed for the SASE and seeded beamlines.

  13. DRIVER ACCELERATOR DESIGN FOR THE 10 KW UPGRADE OF THE JEFFERSON LAB IR FEL

    E-Print Network [OSTI]

    DRIVER ACCELERATOR DESIGN FOR THE 10 KW UPGRADE OF THE JEFFERSON LAB IR FEL D. Douglas, S. V, Newport News, VA23606, USA Abstract An upgrade of the Jefferson Lab IR FEL [1] is now un- der construction. It will provide 10 kW output light power in a wavelength range of 2­10 µm. The FEL will be driven by a modest

  14. Where do Nissan Leaf drivers in The EV Project charge when they have the opportunity to charge at work?

    SciTech Connect (OSTI)

    John Smart; Don Scoffield

    2014-03-01T23:59:59.000Z

    This paper invesigates where Nissan Leaf drivers in the EV Project charge when they have the opportunity to charge at work. Do they charge at work, home, or some other location?

  15. Where do Chevrolet Volt drivers in The EV Project charge when they have the opportunity to charge at work?

    SciTech Connect (OSTI)

    John Smart; Don Scoffield

    2014-03-01T23:59:59.000Z

    This paper investigates where Chevy Volt drivers in the EV Project charge when they have the opportunity to charge at work. Do they charge at home, work, or some other location.

  16. Analytic Framework for Evaluation of State Energy Efficiency and Renewable Energy Policies with Reference to Stakeholder Drivers

    SciTech Connect (OSTI)

    Brown, E.; Mosey, G.

    2008-07-01T23:59:59.000Z

    This report presents the framework that was developed to analyze energy efficiency and renewable energy policies on the state level based on how well they meet the stakeholder drivers.

  17. Compact, Intelligent, Digitally Controlled IGBT Gate Drivers for a PEBB-Based ILC Marx Modulator

    SciTech Connect (OSTI)

    Nguyen, M.N.; Burkhart, C.; Olsen, J.J.; Macken, K.; /SLAC; ,

    2010-06-07T23:59:59.000Z

    SLAC National Accelerator Laboratory has built and is currently operating a first generation prototype Marx klystron modulator to meet ILC specifications. Under development is a second generation prototype, aimed at improving overall performance, serviceability, and manufacturability as compared to its predecessor. It is designed around 32 cells, each operating at 3.75 kV and correcting for its own capacitor droop. Due to the uniqueness of this application, high voltage gate drivers needed to be developed for the main 6.5 kV and droop correction 1.7 kV IGBTs. The gate driver provides vital functions such as protection of the IGBT from over-voltage and over-current, detection of gate-emitter open and short circuit conditions, and monitoring of IGBT degradation (based on collector-emitter saturation voltage). Gate drive control, diagnostic processing capabilities, and communication are digitally implemented using an FPGA. This paper details the design of the gate driver circuitry, component selection, and construction layout. In addition, experimental results are included to illustrate the effectiveness of the protection circuit.

  18. Break-Even Cost for Residential Photovoltaics in the United States: Key Drivers and Sensitivities

    SciTech Connect (OSTI)

    Denholm, P.; Margolis, R. M.; Ong, S.; Roberts, B.

    2009-12-01T23:59:59.000Z

    Grid parity--or break-even cost--for photovoltaic (PV) technology is defined as the point where the cost of PV-generated electricity equals the cost of electricity purchased from the grid. Break-even cost is expressed in $/W of an installed system. Achieving break-even cost is a function of many variables. Consequently, break-even costs vary by location and time for a country, such as the United States, with a diverse set of resources, electricity prices, and other variables. In this report, we analyze PV break-even costs for U.S. residential customers. We evaluate some key drivers of grid parity both regionally and over time. We also examine the impact of moving from flat to time-of-use (TOU) rates, and we evaluate individual components of the break-even cost, including effect of rate structure and various incentives. Finally, we examine how PV markets might evolve on a regional basis considering the sensitivity of the break-even cost to four major drivers: technical performance, financing parameters, electricity prices and rates, and policies. We find that local incentives rather than ?technical? parameters are in general the key drivers of the break-even cost of PV. Additionally, this analysis provides insight about the potential viability of PV markets.

  19. Highway crash rates and age-related driver limitations: Literature review and evaluation of data bases

    SciTech Connect (OSTI)

    Hu, P.S. [Oak Ridge National Lab., TN (United States)] [Oak Ridge National Lab., TN (United States); Young, J.R. [Tennessee Univ., Knoxville, TN (United States)] [Tennessee Univ., Knoxville, TN (United States); Lu, An [Oak Ridge Associated Universities, Inc., TN (United States)] [Oak Ridge Associated Universities, Inc., TN (United States)

    1993-08-01T23:59:59.000Z

    American society is undergoing a major demographic transformation that is resulting in a larger proportion of older individuals in the population. Moreover, recent travel surveys show that an increasing number of older individuals are licensed to drive and that they drive more than their same age cohort a decade ago. However, they continue to take shorter trips than younger drivers and they avoid driving during congested hours. This recent demographic transformation in our society, the graying of America, coupled with the increasing mobility of the older population impose a serious highway safety issue that cannot be overlooked. Some of the major concerns are the identification of ``high-risk`` older drivers and the establishment of licensing guidelines and procedures that are based on conclusive scientific evidence. Oak Ridge National Laboratory`s (ORNL) objectives in this project can be characterized by the following tasks: Review and evaluate the 1980 American Association of Motor Vehicle Administrators (AAMVA) and National Highway Traffic Safety Administration (NHTSA) licensing guidelines. Determine whether the license restriction recommended in the 1980 AAMVA and NHTSA guidelines was based on scientific evidence or on judgement of medical advisors. Identify in the scientific literature any medical conditions which are found to be highly associated with highway crashes, and which are not mentioned in the 1980 guidelines. Summarize States` current licensing practices for drivers with age-related physical and mental limitations. Identify potential data sources to establish conclusive evidence on age-related functional impairments and highway crashes.

  20. Analysis of the Ultra-fast Switching Dynamics in a Hybrid MOSFET/Driver

    SciTech Connect (OSTI)

    Tang, T.; Burkhart, C.; /SLAC

    2011-08-17T23:59:59.000Z

    The turn-on dynamics of a power MOSFET during ultra-fast, {approx} ns, switching are discussed in this paper. The testing was performed using a custom hybrid MOSFET/Driver module, which was fabricated by directly assembling die-form components, power MOSFET and drivers, on a printed circuit board. By using die-form components, the hybrid approach substantially reduces parasitic inductance, which facilitates ultra-fast switching. The measured turn on time of the hybrid module with a resistive load is 1.2 ns with an applied voltage of 1000 V and drain current of 33 A. Detailed analysis of the switching waveforms reveals that switching behavior must be interpreted differently in the ultra-fast regime. For example, the gate threshold voltage to turn on the device is observed to increase as the switching time decreases. Further analysis and simulation of MOSFET switching behavior shows that the minimum turn on time scales with the product of the drain-source on resistance and drain-source capacitance, R{sub DS(on)}C{sub OSS}. This information will be useful in power MOSFET selection and gate driver design for ultra-fast switching applications.

  1. Survey of Laser Markets Relevant to Inertial Fusion Energy Drivers, information for National Research Council

    SciTech Connect (OSTI)

    Bayramian, A J; Deri, R J; Erlandson, A C

    2011-02-24T23:59:59.000Z

    Development of a new technology for commercial application can be significantly accelerated by leveraging related technologies used in other markets. Synergies across multiple application domains attract research and development (R and D) talent - widening the innovation pipeline - and increases the market demand in common components and subsystems to provide performance improvements and cost reductions. For these reasons, driver development plans for inertial fusion energy (IFE) should consider the non-fusion technology base that can be lveraged for application to IFE. At this time, two laser driver technologies are being proposed for IFE: solid-state lasers (SSLs) and KrF gas (excimer) lasers. This document provides a brief survey of organizations actively engaged in these technologies. This is intended to facilitate comparison of the opportunities for leveraging the larger technical community for IFE laser driver development. They have included tables that summarize the commercial organizations selling solid-state and KrF lasers, and a brief summary of organizations actively engaged in R and D on these technologies.

  2. Accounting for the Variation of Driver Aggression in the Simulation of Conventional and Advanced Vehicles (Presentation)

    SciTech Connect (OSTI)

    Neubauer, J.; Wood, E.

    2013-05-01T23:59:59.000Z

    This presentation discusses a method of accounting for realistic levels of driver aggression to higher-level vehicle studies, including the impact of variation in real-world driving characteristics (acceleration and speed) on vehicle energy consumption and different powertrains (e.g., conventionally powered vehicles versus electrified drive vehicles [xEVs]). Aggression variation between drivers can increase fuel consumption by more than 50% or decrease it by more than 20% from average. The normalized fuel consumption deviation from average as a function of population percentile was found to be largely insensitive to powertrain. However, the traits of ideal driving behavior are a function of powertrain. In conventional vehicles, kinetic losses dominate rolling resistance and aerodynamic losses. In xEVs with regenerative braking, rolling resistance and aerodynamic losses dominate. The relation of fuel consumption predicted from real-world drive data to that predicted by the industry-standard HWFET, UDDS, LA92, and US06 drive cycles was not consistent across powertrains, and varied broadly from the mean, median, and mode of real-world driving. A drive cycle synthesized by NREL's DRIVE tool accurately and consistently reproduces average real-world for multiple powertrains within 1%, and can be used to calculate the fuel consumption effects of varying levels of driver aggression.

  3. Use of the National Driver Register in the U.S. Department of Energy Human Reliability Program

    SciTech Connect (OSTI)

    Phillip M. Kannan, Center for Human Reliability Studies

    2007-01-01T23:59:59.000Z

    The National Driver Register (NDR) is a complex information network established and maintained by the Secretary of the Department of Transportation (DOT) under the National Driver Register Act of 1982. This report analyzes the question of whether information from the NDR is available to officials making Human Reliability Program (HRP) certification and recertification decisions and to Department of Energy (DOE) personnel security specialists making access authorization determinations.

  4. Theory and calculations of synchrotron instabilities and feedback-mechanism

    SciTech Connect (OSTI)

    Meijssen, T.E.M.

    1981-08-12T23:59:59.000Z

    The properties of the phenomenon synchrotron radiation are given with general theory on the basic processes and betatron and synchrotron oscillations. A more extended theoretical view at transverse instabilities and the influence of a damping feedback system are discussed. The longitudinal case is covered. For the calculations on the longitudinal case with M equally spaced pointbunches, with N electrons each, in the storage ring, the parasitic modes of the radio-frequency cavity were measured. A description of this is given. The values of damping rates of the longitudinal feedback system found, are as expected, but too low to damp the longitudinal instabilities calculated. This might be caused by the input data. The calculated growth rates are very sensitive to changes in frequency and width of the parasitic modes, which were measured under conditions differing slightly from the operating conditions.

  5. Enhanced Energy-Aware Feedback Scheduling of Embedded Control Systems

    E-Print Network [OSTI]

    Xia, Feng; Zhao, Wenhong; Sun, Youxian; Dong, Jinxiang

    2008-01-01T23:59:59.000Z

    Dynamic voltage scaling (DVS) is one of the most effective techniques for reducing energy consumption in embedded and real-time systems. However, traditional DVS algorithms have inherent limitations on their capability in energy saving since they rarely take into account the actual application requirements and often exploit fixed timing constraints of real-time tasks. Taking advantage of application adaptation, an enhanced energy-aware feedback scheduling (EEAFS) scheme is proposed, which integrates feedback scheduling with DVS. To achieve further reduction in energy consumption over pure DVS while not jeopardizing the quality of control, the sampling period of each control loop is adapted to its actual control performance, thus exploring flexible timing constraints on control tasks. Extensive simulation results are given to demonstrate the effectiveness of EEAFS under different scenarios. Compared with the optimal pure DVS scheme, EEAFS saves much more energy while yielding comparable control performance.

  6. Experimental control of chaos by variable and distributed delay feedback

    E-Print Network [OSTI]

    Thomas Jüngling; Aleksandar Gjurchinovski; Viktor Urumov

    2012-02-02T23:59:59.000Z

    We report on a significant improvement of the classical time-delayed feedback control method for stabilization of unstable periodic orbits or steady states. In an electronic circuit experiment we were able to realize time-varying and distributed delays in the control force leading to successful control for large parameter sets including large time delays. The presented technique makes advanced use of the natural torsion of the orbits, which is also necessary for the original control method to work.

  7. The pointer basis and the feedback stabilization of quantum systems

    E-Print Network [OSTI]

    L. Li; A. Chia; H. M. Wiseman

    2014-11-19T23:59:59.000Z

    The dynamics for an open quantum system can be `unravelled' in infinitely many ways, depending on how the environment is monitored, yielding different sorts of conditioned states, evolving stochastically. In the case of ideal monitoring these states are pure, and the set of states for a given monitoring forms a basis (which is overcomplete in general) for the system. It has been argued elsewhere [D. Atkins et al., Europhys. Lett. 69, 163 (2005)] that the `pointer basis' as introduced by Zurek and Paz [Phys. Rev. Lett 70, 1187(1993)], should be identified with the unravelling-induced basis which decoheres most slowly. Here we show the applicability of this concept of pointer basis to the problem of state stabilization for quantum systems. In particular we prove that for linear Gaussian quantum systems, if the feedback control is assumed to be strong compared to the decoherence of the pointer basis, then the system can be stabilized in one of the pointer basis states with a fidelity close to one (the infidelity varies inversely with the control strength). Moreover, if the aim of the feedback is to maximize the fidelity of the unconditioned system state with a pure state that is one of its conditioned states, then the optimal unravelling for stabilizing the system in this way is that which induces the pointer basis for the conditioned states. We illustrate these results with a model system: quantum Brownian motion. We show that even if the feedback control strength is comparable to the decoherence, the optimal unravelling still induces a basis very close to the pointer basis. However if the feedback control is weak compared to the decoherence, this is not the case.

  8. Feedback-Controlled LED Photobioreactor for Photophysiological Studies of Cyanobacteria

    SciTech Connect (OSTI)

    Melnicki, Matthew R.; Pinchuk, Grigoriy E.; Hill, Eric A.; Kucek, Leo A.; Stolyar, Sergey; Fredrickson, Jim K.; Konopka, Allan; Beliaev, Alex S.

    2013-04-09T23:59:59.000Z

    A custom photobioreactor (PBR) was designed to enable automatic light adjustments using computerized feedback control. A black anodized aluminum enclosure, constructed to surround the borosilicate reactor vessel, prevents the transmission of ambient light and serves as a mount for arrays of light-emitting diodes (LEDs). The high-output LEDs provide narrow-band light of either 630 or 680 nm for preferential excitation of the cyanobacterial light-harvesting pigments, phycobilin or chlorophyll a, respectively. Custom developed software BioLume provides automatic control of optical properties and a computer feedback loop can automatically adjust the incident irradiance as necessary to maintain a fixed transmitted light through the culture, based on user-determined set points. This feedback control serves to compensate for culture dynamics which have optical effects, (e.g., changing cell density, pigment adaptations) and thus can determine the appropriate light conditions for physiological comparisons or to cultivate light-sensitive strains, without prior analyses. The LED PBR may also be controlled as a turbidostat, using a feedback loop to continuously adjust the rate of media-dilution based on the transmitted light measurements, with a fast and precise response. This cultivation system gains further merit as a high-performance analytical device, using non-invasive tools (e.g., dissolved gas sensors, online mass spectrometry) to automate real-time measurements, thus permitting unsupervised experiments to search for optimal growth conditions, to monitor physiological responses to perturbations, as well as to quantitate photophysiological parameters using an in situ light-saturation response routine.

  9. Single electron beam rf feedback free electron laser

    DOE Patents [OSTI]

    Brau, C.A.; Stein, W.E.; Rockwood, S.D.

    1981-02-11T23:59:59.000Z

    A free electron laser system and electron beam system for a free electron laser which uses rf feedback to enhance efficiency are described. Rf energy is extracted from a single electron beam by decelerating cavities and energy is returned to accelerating cavities using rf returns, such as rf waveguides, rf feedthroughs, resonant feedthroughs, etc. This rf energy is added to rf klystron energy to reduce the required input energy and thereby enhance energy efficiency of the system.

  10. The Radiative Feedback of the First Cosmological Objects

    E-Print Network [OSTI]

    Zoltan Haiman; Tom Abel; Martin J. Rees

    1999-03-23T23:59:59.000Z

    In hierarchical models of structure formation, an early cosmic UV background (UVB) is produced by the small (T_vir 10^4 K) collapse. If the small halos host mini-quasars with hard spectra extending to approximately 1 keV, then their X-rays balance the effects of the UVB, the negative feedback does not occur, and reionization can be caused by the small halos.

  11. Oscillation annealing and driver/tire load torque estimation in Electric Power Steering Systems

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    the improved LuGre-tire friction model. Index Terms-- Electric Power Steering systems (EPSs), LQ control, Lu a control framework that includes a realistic model of a steering column accounting for all other torque. The contributions of this paper are: a) Optimal output control feedback: Based on the steer- ing column model

  12. Moment Closure Approximations in a Genetic Negative Feedback Circuit

    E-Print Network [OSTI]

    Mohammad Soltani; Cesar Vargas; Niraj Kumar; Rahul Kulkarni; Abhyudai Singh

    2014-05-15T23:59:59.000Z

    Auto-regulation, a process wherein a protein negatively regulates its own production, is a common motif in gene expression networks. Negative feedback in gene expression plays a critical role in buffering intracellular fluctuations in protein concentrations around optimal value. Due to the nonlinearities present in these feedbacks, moment dynamics are typically not closed, in the sense that the time derivative of the lower-order statistical moments of the protein copy number depends on high-order moments. Moment equations are closed by expressing higher-order moments as nonlinear functions of lower-order moments, a technique commonly referred to as moment closure. Here, we compare the performance of different moment closure techniques. Our results show that the commonly used closure method, which assumes a priori that the protein population counts are normally distributed, performs poorly. In contrast, conditional derivative matching, a novel closure scheme proposed here provides a good approximation to the exact moments across different parameter regimes. In summary our study provides a new moment closure method for studying stochastic dynamics of genetic negative feedback circuits, and can be extended to probe noise in more complex gene networks.

  13. Decoherence Control in Open Quantum System via Classical Feedback

    E-Print Network [OSTI]

    Narayan Ganesan; Tzyh Jong Tarn

    2006-11-29T23:59:59.000Z

    In this work we propose a novel strategy using techniques from systems theory to completely eliminate decoherence and also provide conditions under which it can be done so. A novel construction employing an auxiliary system, the bait, which is instrumental to decoupling the system from the environment is presented. Our approach to decoherence control in contrast to other approaches in the literature involves the bilinear input affine model of quantum control system which lends itself to various techniques from classical control theory, but with non-trivial modifications to the quantum regime. The elegance of this approach yields interesting results on open loop decouplability and Decoherence Free Subspaces(DFS). Additionally, the feedback control of decoherence may be related to disturbance decoupling for classical input affine systems, which entails careful application of the methods by avoiding all the quantum mechanical pitfalls. In the process of calculating a suitable feedback the system has to be restructured due to its tensorial nature of interaction with the environment, which is unique to quantum systems. The results are qualitatively different and superior to the ones obtained via master equations. Finally, a methodology to synthesize feedback parameters itself is given, that technology permitting, could be implemented for practical 2-qubit systems to perform decoherence free Quantum Computing.

  14. Feedback Mechanism for Microtubule Length Regulation by Stathmin Gradients

    E-Print Network [OSTI]

    Maria Zeitz; Jan Kierfeld

    2014-12-09T23:59:59.000Z

    We formulate and analyze a theoretical model for the regulation of microtubule (MT) polymerization dynamics by the signaling proteins Rac1 and stathmin. In cells, the MT growth rate is inhibited by cytosolic stathmin, which, in turn, is inactivated by Rac1. Growing MTs activate Rac1 at the cell edge, which closes a positive feedback loop. We investigate both tubulin sequestering and catastrophe promotion as mechanisms for MT growth inhibition by stathmin. For a homogeneous stathmin concentration in the absence of Rac1, we find a switch-like regulation of the MT mean length by stathmin. For constitutively active Rac1 at the cell edge, stathmin is deactivated locally, which establishes a spatial gradient of active stathmin. In this gradient, we find a stationary bimodal MT length distributions for both mechanisms of MT growth inhibition by stathmin. One subpopulation of the bimodal length distribution can be identified with fast growing and long pioneering MTs in the region near the cell edge, which have been observed experimentally. The feedback loop is closed through Rac1 activation by MTs. For tubulin sequestering by stathmin, this establishes a bistable switch with two stable states: one stable state corresponds to upregulated MT mean length and bimodal MT length distributions, i.e., pioneering MTs; the other stable state corresponds to an interrupted feedback with short MTs. Stochastic effects as well as external perturbations can trigger switching events. For catastrophe promoting stathmin we do not find bistability.

  15. Coherence-enhanced efficiency of feedback-driven quantum engines

    E-Print Network [OSTI]

    Kay Brandner; Michael Bauer; Michael T. Schmid; Udo Seifert

    2015-03-16T23:59:59.000Z

    A genuine feature of projective quantum measurements is that they inevitably alter the mean energy of the observed system if the measured quantity does not commute with the Hamiltonian. Compared to the classical case, Jacobs proved that this additional energetic cost leads to a stronger bound on the work extractable after a single measurement from a system initially in thermal equilibrium [Phys. Rev. A 80, 012322 (2009)]. Here, we extend this bound to a large class of feedback-driven quantum engines operating periodically and in finite time. The bound thus implies a natural definition for the efficiency of information to work conversion in such devices. For a simple model consisting of a laser-driven two-level system, we maximize the efficiency with respect to the observable whose measurement is used to control the feedback operations. We find that the optimal observable typically does not commute with the Hamiltonian and hence would not be available in a classical two level system. This result reveals that periodic feedback engines operating in the quantum realm can exploit quantum coherences to enhance efficiency.

  16. The Impact of Galactic Feedback on the Circumgalactic Medium

    E-Print Network [OSTI]

    Suresh, Joshua; Vogelsberger, Mark; Genel, Shy; Torrey, Paul; Sijacki, Debora; Springel, Volker; Hernquist, Lars

    2015-01-01T23:59:59.000Z

    Galactic feedback strongly affects the way galactic environments are enriched. We examine this connection by performing a suite of cosmological hydrodynamic simulations, exploring a range of parameters based on the galaxy formation model developed in Vogelsberger et al. 2013 (henceforth V13). We examine the effects of AGN feedback, wind mass loading, wind specific energy, and wind metal-loading on the properties of the circumgalactic medium (CGM) of galaxies with $M_\\text{halo} > 10^{11} M_\\odot$. Note that while the V13 model was tuned to match observations including the stellar mass function, no explicit tuning was done for the CGM. The wind energy per unit outflow mass has the most significant effect on the CGM enrichment. High energy winds launch metals far beyond the virial radius. AGN feedback also has a significant effect, but only at $z < 3$. We compare to high redshift HI and CIV observations. All our simulations produce the observed number of Damped Lyman-$\\alpha$ Absorbers. At lower column densi...

  17. FEEDBACK EFFECTS ON LOW-MASS STAR FORMATION

    SciTech Connect (OSTI)

    Hansen, Charles E.; Klein, Richard I.; McKee, Christopher F. [Astronomy Department, University of California, Berkeley, CA 94720 (United States); Fisher, Robert T. [Physics Department, University of Massachusetts, Dartmouth, MA (United States)

    2012-03-01T23:59:59.000Z

    Protostellar feedback, both radiation and bipolar outflows, dramatically affects the fragmentation and mass accretion from star-forming cores. We use ORION, an adaptive mesh refinement gravito-radiation-hydrodynamics code, to simulate low-mass star formation in a turbulent molecular cloud in the presence of protostellar feedback. We present results of the first simulations of a star-forming cluster that include both radiative transfer and protostellar outflows. We run four simulations to isolate the individual effects of radiation feedback and outflow feedback as well as the combination of the two. We find that outflows reduce protostellar masses and accretion rates each by a factor of three and therefore reduce protostellar luminosities by an order of magnitude. This means that, while radiation feedback suppresses fragmentation, outflows render protostellar radiation largely irrelevant for low-mass star formation above a mass scale of 0.05 M{sub Sun }. We find initial fragmentation of our cloud at half the global Jeans length, around 0.1 pc. With insufficient protostellar radiation to stop it, these 0.1 pc cores fragment repeatedly, forming typically 10 stars each. The accretion rate in these stars scales with mass as predicted from core accretion models that include both thermal and turbulent motions; the accretion rate does not appear to be consistent with either competitive accretion or accretion from an isothermal sphere. We find that protostellar outflows do not significantly affect the overall cloud dynamics, in the absence of magnetic fields, due to their small opening angles and poor coupling to the dense gas. The outflows reduce the mass from the cores by 2/3, giving a core to star efficiency, {epsilon}{sub core} {approx_equal} 1/3. The simulations are also able to reproduce many observation of local star-forming regions. Our simulation with radiation and outflows reproduces the observed protostellar luminosity function. All of the simulations can reproduce observed core mass functions, though we find they are sensitive to telescope resolution. We also reproduce the two-point correlation function of these observed cores. Lastly, we reproduce the initial mass function itself, including the low-mass end, when outflows are included.

  18. The role of the cant and lateral position of the steering wheel in the orientation of drivers to the location of the automotive pedals

    E-Print Network [OSTI]

    Sherrod, M. G

    1989-01-01T23:59:59.000Z

    examined the effects of three steering wheel cants and three steering wheel lateral positions on drivers' preferred automotive foot pedal locations and separation distances. The dependent variables were the preferred vertical and horizontal positions... in orienting the driver to the locations of the pedals and should be part of any design recommendations detailing the relationship between the driver and the foot pedals. ACKNOWLEDGEMENTS I would like to thank the chairman of my Advisory Committee, Dr...

  19. Battery Electric Vehicles: Range Optimization and Diversification for the U.S. Drivers

    SciTech Connect (OSTI)

    Lin, Zhenhong [ORNL] [ORNL

    2012-01-01T23:59:59.000Z

    Properly selecting the driving range is critical for accurately predicting the market acceptance and the resulting social benefits of BEVs. Analysis of transportation technology transition could be biased against battery electric vehicles (BEV) and mislead policy making, if BEVs are not represented with optimal ranges. This study proposes a coherent method to optimize the BEV driving range by minimizing the range-related cost, which is formulated as a function of range, battery cost, energy prices, charging frequency, access to backup vehicles, and the cost and refueling hassle of operating the backup vehicle. This method is implemented with a sample of 36,664 drivers, representing U.S. new car drivers, based on the 2009 National Household Travel Survey data. Key findings are: 1) Assuming the near term (2015) battery cost at $405/kWh, about 98% of the sampled drivers are predicted to prefer a range below 200 miles, and about 70% below 100 miles. The most popular 20-mile band of range is 57 to77 miles, unsurprisingly encompassing the Leaf s EPA-certified 73-mile range. With range limited to 4 or 7 discrete options, the majority are predicted to choose a range below 100 miles. 2) Found as a statistically robust rule of thumb, the BEV optimal range is approximately 0.6% of one s annual driving distance. 3) Reducing battery costs could motivate demand for larger range, but improving public charging may cause the opposite. 4) Using a single range to represent BEVs in analysis could significantly underestimate their competitiveness e.g. by $3226/vehicle if BEVs are represented with 73-mile range only or by $7404/BEV if with 150-mile range only. Range optimization and diversification into 4 or 7 range options reduce such analytical bias by 78% or 90%, respectively.

  20. Charged particle driver for ICF using an accelerated, focused compact torus

    SciTech Connect (OSTI)

    Meeker, D.J.; Hammer, J.H.; Hartman, C.W.

    1986-06-01T23:59:59.000Z

    We report the status of evaluating an accelerated and focused compact torus as a driver for ICF. We are studying the acceleration and focusing aspects experimentally in the RACE facility, a recently completed ring generator coupled to a 260 kJ acceleration bank. Compact torus and ICF target interaction is being investigated with PIC codes and LASNEX, a 2D magneto-hydrodynamics code. Final conditions required of the CT are discussed as well as coupling issues such as superthermal electron production. We conclude with an economic evaluation of a few 100 MW reactor driven by a compact torus. 9 refs., 5 figs., 1 tab.

  1. What are the main drivers of the Bitcoin price? Evidence from wavelet coherence analysis

    E-Print Network [OSTI]

    Kristoufek, Ladislav

    2014-01-01T23:59:59.000Z

    Bitcoin has emerged as a fascinating phenomenon of the financial markets. Without any central authority issuing the currency, it has been associated with controversy ever since its popularity and public interest reached high levels. Here, we contribute to the discussion by examining potential drivers of Bitcoin prices ranging from fundamental to speculative and technical sources as well as a potential influence of the Chinese market. The evolution of the relationships is examined in both time and frequency domains utilizing the continuous wavelets framework so that we comment on development of the interconnections in time but we can also distinguish between short-term and long-term connections.

  2. Shaping the output pulse of a linear-transformer-driver module.

    SciTech Connect (OSTI)

    Long, Finis W.; McKee, G. Randall; Stoltzfus, Brian Scott; Woodworth, Joseph Ray; McKenney, John Lee; Fowler, William E.; Mazarakis, Michael Gerrassimos; Porter, John L.; Stygar, William A.; Savage, Mark Edward; LeChien, Keith, R.; Van De Valde, David M. (EG& G, Albuquerque, NM)

    2008-11-01T23:59:59.000Z

    We demonstrate that a wide variety of current-pulse shapes can be generated using a linear-transformer-driver (LTD) module that drives an internal water-insulated transmission line. The shapes are produced by varying the timing and initial charge voltage of each of the module's cavities. The LTD-driven accelerator architecture outlined in [Phys. Rev. ST Accel. Beams 10, 030401 (2007)] provides additional pulse-shaping flexibility by allowing the modules that drive the accelerator to be triggered at different times. The module output pulses would be combined and symmetrized by water-insulated radial-transmission-line impedance transformers [Phys. Rev. ST Accel. Beams 11, 030401 (2008)].

  3. Low-jitter high-power thyristor array pulse driver and generator

    DOE Patents [OSTI]

    Hanks, Roy L. (Byron, CA)

    2002-01-01T23:59:59.000Z

    A method and apparatus for generating low-jitter, high-voltage and high-current pulses for driving low impedance loads such as detonator fuses uses a MOSFET driver which, when triggered, discharges a high-voltage pre-charged capacitor into the primary of a toroidal current-multiplying transformer with multiple isolated secondary windings. The secondary outputs are suitable for driving an array of thyristors that discharge a precharged high-voltage capacitor and thus generating the required high-voltage and high-current pulse.

  4. Linear beam raster magnet driver based on H-bridge technique

    DOE Patents [OSTI]

    Sinkine, Nikolai I.; Yan, Chen; Apeldoorn, Cornelis; Dail, Jeffrey Glenn; Wojcik, Randolph Frank; Gunning, William

    2006-06-06T23:59:59.000Z

    An improved raster magnet driver for a linear particle beam is based on an H-bridge technique. Four branches of power HEXFETs form a two-by-two switch. Switching the HEXFETs in a predetermined order and at the right frequency produces a triangular current waveform. An H-bridge controller controls switching sequence and timing. The magnetic field of the coil follows the shape of the waveform and thus steers the beam using a triangular rather than a sinusoidal waveform. The system produces a raster pattern having a highly uniform raster density distribution, eliminates target heating from non-uniform raster density distributions, and produces higher levels of beam current.

  5. Data acquisition with a VAX 11/780 and MBD branch driver

    SciTech Connect (OSTI)

    King, S.E. (Duke Univ., Durham, NC); Lau, Y.C.; Gould, C.R.

    1981-10-01T23:59:59.000Z

    We have designed and implemented a general purpose data acquisition system, XSYS, for the Triangle Universities Nuclear Laboratory VAX-11/780. The interface is a CAMAC Branch Highway connected to a Microprogrammed Branch Driver (MBD-11). A single general reentrant MBD program handles CAMAC operations and data transfers to and from the VAX using a DMA transfer. Each of the eight MBD channels is controlled by an independent subprocess in the VAX which communicates with the MBD via the UNIBUS. Data are double buffered and are sorted by VAX user written EVAL codes after the MBD wakes a hibernating subprocess image. Scalar operations and control of external devices are also supported.

  6. Overview of proton drivers for neutrino super beams and neutrino factories

    SciTech Connect (OSTI)

    Chou, W.; /Fermilab

    2006-06-01T23:59:59.000Z

    There has been a world-wide interest in Proton Drivers in the past decade. Numerous design proposals have been presented in Asia, Europe and North America, ranging from low energy rapid cycling synchrotrons, normal or superconducting linacs to high energy slow cycling synchrotrons and FFAGs. One thing in common is that all these machines provide MW beam power and are used primarily for neutrino experiments. This paper gives an overview of these activities. In the last section the author expresses his personal opinion on the future of this field.

  7. Supplement Table 1. Mean environmental drivers at Brasil flux sites. Precipitation (Prec) from Tropical Rainfall Measuring Mission (TRMM), for site-specific tower measurement years and a

    E-Print Network [OSTI]

    Malhi, Yadvinder

    Supplement Table 1. Mean environmental drivers at Brasil flux sites. Precipitation (Prec) from #12;Supplement Table 2. Brasil flux sites instrumentation and measuring methods. *: non aspirated

  8. Temperature feedback control for long-term carrier-envelope phase locking

    DOE Patents [OSTI]

    Chang, Zenghu (Manhattan, KS); Yun, Chenxia (Manhattan, KS); Chen, Shouyuan (Manhattan, KS); Wang, He (Manhattan, KS); Chini, Michael (Manhattan, KS)

    2012-07-24T23:59:59.000Z

    A feedback control module for stabilizing a carrier-envelope phase of an output of a laser oscillator system comprises a first photodetector, a second photodetector, a phase stabilizer, an optical modulator, and a thermal control element. The first photodetector may generate a first feedback signal corresponding to a first portion of a laser beam from an oscillator. The second photodetector may generate a second feedback signal corresponding to a second portion of the laser beam filtered by a low-pass filter. The phase stabilizer may divide the frequency of the first feedback signal by a factor and generate an error signal corresponding to the difference between the frequency-divided first feedback signal and the second feedback signal. The optical modulator may modulate the laser beam within the oscillator corresponding to the error signal. The thermal control unit may change the temperature of the oscillator corresponding to a signal operable to control the optical modulator.

  9. Integrin activation - the importance of a positive feedback

    E-Print Network [OSTI]

    Dagmar Iber; Iain D Campbell

    2006-03-31T23:59:59.000Z

    Integrins mediate cell adhesion and are essential receptors for the development and functioning of multicellular organisms. Integrin activation is known to require both ligand and talin binding and to correlate with cluster formation but the activation mechanism and precise roles of these processes are not yet resolved. Here mathematical modeling, with known experimental parameters, is used to show that the binding of a stabilizing factor, such as talin, is alone insufficient to enable ligand-dependent integrin activation for all observed conditions; an additional positive feedback is required.

  10. Robust quantum parameter estimation: Coherent magnetometry with feedback

    SciTech Connect (OSTI)

    Stockton, John K.; Geremia, J.M.; Doherty, Andrew C.; Mabuchi, Hideo [Norman Bridge Laboratory of Physics, Mail Code 12-33, California Institute of Technology, Pasadena, California 91125 (United States)

    2004-03-01T23:59:59.000Z

    We describe the formalism for optimally estimating and controlling both the state of a spin ensemble and a scalar magnetic field with information obtained from a continuous quantum limited measurement of the spin precession due to the field. The full quantum parameter estimation model is reduced to a simplified equivalent representation to which classical estimation and control theory is applied. We consider both the tracking of static and fluctuating fields in the transient and steady-state regimes. By using feedback control, the field estimation can be made robust to uncertainty about the total spin number.

  11. On Optimal Feedback Control for Stationary Linear Systems

    SciTech Connect (OSTI)

    Russell, David L., E-mail: russell@math.vt.ed [Virginia Tech, Department of Mathematics (United States)

    2010-04-15T23:59:59.000Z

    We study linear-quadratic optimal control problems for finite dimensional stationary linear systems AX+BU=Z with output Y=CX+DU from the viewpoint of linear feedback solution. We interpret solutions in relation to system robustness with respect to disturbances Z and relate them to nonlinear matrix equations of Riccati type and eigenvalue-eigenvector problems for the corresponding Hamiltonian system. Examples are included along with an indication of extensions to continuous, i.e., infinite dimensional, systems, primarily of elliptic type.

  12. Weak Measurement and Feedback in Superconducting Quantum Circuits

    E-Print Network [OSTI]

    K. W. Murch; R. Vijay; I. Siddiqi

    2015-07-16T23:59:59.000Z

    We describe the implementation of weak quantum measurements in superconducting qubits, focusing specifically on transmon type devices in the circuit quantum electrodynamics architecture. To access this regime, the readout cavity is probed with on average a single microwave photon. Such low-level signals are detected using near quantum-noise-limited superconducting parametric amplifiers. Weak measurements yield partial information about the quantum state, and correspondingly do not completely project the qubit into an eigenstate. As such, we use the measurement record to either sequentially reconstruct the quantum state at a given time, yielding a quantum trajectory, or to close a direct quantum feedback loop, stabilizing Rabi oscillations indefinitely.

  13. Self-Excitation and Feedback Cooling of an Isolated Proton

    SciTech Connect (OSTI)

    Guise, N.; DiSciacca, J.; Gabrielse, G. [Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)

    2010-04-09T23:59:59.000Z

    The first one-proton self-excited oscillator (SEO) and one-proton feedback cooling are demonstrated. In a Penning trap with a large magnetic gradient, the SEO frequency is resolved to the high precision needed to detect a one-proton spin flip. This is after undamped magnetron motion is sideband cooled to a 14 mK theoretical limit, and despite random frequency shifts (typically larger than those from a spin flip) that take place every time sideband cooling is applied. The observations open a possible path towards a million-fold improved comparison of the p and p magnetic moments.

  14. Ignition feedback regenerative free electron laser (FEL) amplifier

    DOE Patents [OSTI]

    Kim, Kwang-Je (Burr Ridge, IL); Zholents, Alexander (Walnut Creek, CA); Zolotorev, Max (Oakland, CA)

    2001-01-01T23:59:59.000Z

    An ignition feedback regenerative amplifier consists of an injector, a linear accelerator with energy recovery, and a high-gain free electron laser amplifier. A fraction of the free electron laser output is coupled to the input to operate the free electron laser in the regenerative mode. A mode filter in this loop prevents run away instability. Another fraction of the output, after suitable frequency up conversion, is used to drive the photocathode. An external laser is provided to start up both the amplifier and the injector, thus igniting the system.

  15. Fiber optic sensor: Feedback control design and implementation

    SciTech Connect (OSTI)

    Tung, D.; Bertram, L.; Hillaire, R.; Anderson, S.; Leonard, S.; Marburger, S.

    1997-07-01T23:59:59.000Z

    Digital feedback control of Gas Tungsten Arc Welding (GTAW) has been demonstrated on a tube sample of stainless steel and titanium alloy. A fiber optic sensor returns a signal proportional to backside radiance from the workpiece; that signal is used by the controller to compute a compensation weld current. The controller executes 10 times a second on an Intel 486 chip. For travel speeds of 3 to 6 inches per minute and thicknesses between 0.025 and 0.10 inches, constant backside bead width was maintained within 0.02 inches, from startup to tie-in.

  16. Contractor Rating and Feedback Systems | Department of Energy

    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 onYouTube YouTube Note: Since the YouTube platformBuildingCoalComplex(GC-72) | DepartmentEnergy8Rating and Feedback

  17. Carbon Credit Capital and Feedback Ventures JV | Open Energy Information

    Open Energy Info (EERE)

    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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomassSustainableCSL GasPermits ManualCanisteo,Verde:ConnectionsUtah:Feedback

  18. Fermilab | Fermilab at Work | Web Form | Feedback Form

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) Environmental Assessments (EA)Budget » FYU.S. DOEFigureTip ofThe EAGFermilabFeedback

  19. Quantum feedback cooling of a single trapped ion in front of a mirror

    E-Print Network [OSTI]

    V. Steixner; P. Rabl; P. Zoller

    2005-06-22T23:59:59.000Z

    We develop a theory of quantum feedback cooling of a single ion trapped in front of a mirror. By monitoring the motional sidebands of the light emitted into the mirror mode we infer the position of the ion, and act back with an appropriate force to cool the ion. We derive a feedback master equation along the lines of the quantum feedback theory developed by Wiseman and Milburn, which provides us with cooling times and final temperatures as a function of feedback gain and various system parameters.

  20. On-Board Measurement of Ammonia and Nitrous Oxide Using Feedback...

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

    Board Measurement of Ammonia and Nitrous Oxide Using Feedback Absorption Laser Spectroscopy Combined with Amplified Resonance and Low Pressure Sampling On-Board Measurement of...

  1. Feedback, power control, and beamforming : methods for situational aware wireless networks

    E-Print Network [OSTI]

    Huang, Yichao

    2012-01-01T23:59:59.000Z

    Outage balancing in multiuser MISO networks: network dualityOutage balancing in multiuser MISO networks: network dualitywith partial feedback for MISO downlink transmission using

  2. A High-Fidelity Energy Monitoring and Feedback Architecture for Reducing Electrical Consumption in Buildings

    E-Print Network [OSTI]

    Jiang, Xiaofan

    2010-01-01T23:59:59.000Z

    Idle Laptop Figure 9.4: Aggregated energy usage by applianceenergy usage based on the appliance types, such CHAPTER 8. FEEDBACK as “desktops”, “laptops”, “

  3. An Investigation into the Benefits of Tactile Feedback for Laparoscopic, Robotic, and Remote Surgery

    E-Print Network [OSTI]

    Wottawa, Christopher Robert

    2013-01-01T23:59:59.000Z

    Remote Surgery System with Integrated Tactile Feedback The primary difficulty in using the LapaRobot was the occurrence of power and heating

  4. A model for improving microbial biofuel production using a synthetic feedback loop

    E-Print Network [OSTI]

    Dunlop, Mary J.; Keasling, Jay D.; Mukhopadhyay, Aindrila

    2010-01-01T23:59:59.000Z

    potential for great impact. Biofuels are a promising form ofbe engineered to produce biofuels, the fuels are often toxicKeywords Feedback control Á Biofuels Á Biological control

  5. An Investigation into the Benefits of Tactile Feedback for Laparoscopic, Robotic, and Remote Surgery

    E-Print Network [OSTI]

    Wottawa, Christopher Robert

    2013-01-01T23:59:59.000Z

    to haptic feedback in robotic surgery. (March 2010 NSFfeedback actuator array for robotic surgery or simulation.conventional versus robotic approach—a comparative study.

  6. adrenaline-mediated positive feedback: Topics by E-print Network

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

    of galaxy evolution to form massive galaxies compatible with observations. I will present some of our recent results and will put them into further context of other feedback...

  7. age-dependent feedback control: Topics by E-print Network

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

    A feedback mechanism based on hamiltonian tracking Quantum Physics (arXiv) Summary: Enviroment - caused dissipation disrupts the hamiltonian evolution of all quantum systems...

  8. Plasma properties of driver gas following interplanetary shocks observed by ISEE-3

    SciTech Connect (OSTI)

    Zwickl, R.D.; Asbridge, J.R.; Bame, S.J.; Feldman, W.C.; Gosling, J.T.; Smith, E.J.

    1982-01-01T23:59:59.000Z

    Plasma fluid parameters calculated from solar wind and magnetic field data obtained on ISEE 3 were studied to determine the characteristic properties of driver gas following interplanetary shocks. Of 54 shocks observed from August 1978 to February 1980, 9 contained a well defined driver gas that was clearly identifiable by a discontinuous decrease in the average proton temperature across a tangential discontinuity. While helium enhancements were present in all of 9 of these events, only about half of them contained simultaneous changes in the two quantities. Often the He/H ratio changed over a period of minutes. Simultaneous with the drop in proton temperature the helium and electron temperature decreased abruptly. In some cases the proton temperature depression was accompanied by a moderate increase in magnetic field magnitude with an unusually low variance and by an increase in the ratio of parallel to perpendicular temperature. The drive gas usually displayed a bi-directional flow of suprathermal solar wind electrons at higher energies (>137 eV).

  9. Breakeven Cost for Residential Photovoltaics in the United States: Key Drivers and Sensitivities (Report Summary) (Presentation)

    SciTech Connect (OSTI)

    Denholm, P.; Margolis, R. M.; Ong, S.; Roberts, B.

    2009-12-01T23:59:59.000Z

    "Break-even cost" for photovoltaic (PV) technology is defined as the point where the cost of PV-generated electricity equals the cost of electricity purchased from the grid. Break-even cost is expressed in $/W of an installed system. Achieving break-even cost is a function of many variables. Consequently, break-even costs vary by location and time for a country, such as the United States, with a diverse set of resources, electricity prices, and other variables. In this presentation, we introduce an analysis of PV break-even costs for residential customers in the United States, including an evaluation of some of the key drivers of PV breakeven both regionally and over time. This presentation includes our methodology and presents results for both near-term residential breakeven costs(2009) and future market sensitivities of break-even costs (2015). See also the the report "Break-Even Cost for Residential Photovoltaics in the United States: Key Drivers and Sensitivities". Presentation for NREL/TP-6A2-45991.

  10. Optimizing and Diversifying Electric Vehicle Driving Range for U.S. Drivers

    SciTech Connect (OSTI)

    Lin, Zhenhong [ORNL

    2014-01-01T23:59:59.000Z

    Properly determining the driving range is critical for accurately predicting the sales and social benefits of battery electric vehicles (BEVs). This study proposes a framework for optimizing the driving range by minimizing the sum of battery price, electricity cost, and range limitation cost referred to as the range-related cost as a measurement of range anxiety. The objective function is linked to policy-relevant parameters, including battery cost and price markup, battery utilization, charging infrastructure availability, vehicle efficiency, electricity and gasoline prices, household vehicle ownership, daily driving patterns, discount rate, and perceived vehicle lifetime. Qualitative discussion of the framework and its empirical application to a sample (N=36,664) representing new car drivers in the United States is included. The quantitative results strongly suggest that ranges of less than 100 miles are likely to be more popular in the BEV market for a long period of time. The average optimal range among U.S. drivers is found to be largely inelastic. Still, battery cost reduction significantly drives BEV demand toward longer ranges, whereas improvement in the charging infrastructure is found to significantly drive BEV demand toward shorter ranges. The bias of a single-range assumption and the effects of range optimization and diversification in reducing such biases are both found to be significant.

  11. A thirty-two clock hour driver education classroom curriculum guide

    E-Print Network [OSTI]

    Richardson, William Lee

    1990-01-01T23:59:59.000Z

    A THIRTY-TWO CLOCK HOUR DRIVER EDUCATION CLASSROOM CURRICULUM GUIDE A R e c o r d o f St u d y by WILLIAM LEE RICHARDSON S u b m i t t e d t o t h e O f f i c e o f G r a d u a t e S t u d i e s o f Texas A&M U n i v e r s i t y i n p a r t i... a l f u l f i l l m e n t o f t h e r e q u i r e m e n t s f o r t h e de g r e e o f DOCTOR OF EDUCATION December 1990 M a j o r S u b j e c t : I n d u s t r i a l E d u c a t i o n A THIRTY-TWO CLOCK HOUR DRIVER EDUCATION CLASSROOM...

  12. Review: Balancing Limiting Factors and Economic Drivers to Achieve Sustainable Midwestern US Agricultural Residue Feedstock Supplies

    SciTech Connect (OSTI)

    Wally W. Wilhelm; J. Richard Hess; Douglas L. Karlen; David J. Muth; Jane M. F. Johnson; John M. Baker; Hero T. Gollany; Jeff M. Novak; Diane E. Stott; Gary E. Varvel

    2010-10-01T23:59:59.000Z

    Advanced biofuels will be developed using cellulosic feedstock rather than grain or oilseed crops that can also be used for food and feed. To be sustainable, these new agronomic production systems must be economically viable without degrading soil resources. This review examines six agronomic factors that collectively define many of the limits and opportunities for harvesting crop residue for biofuel feedstock. These six “limiting factors” are discussed in relationship to economic drivers associated with harvesting corn (Zea mays L.) stover as a potential cellulosic feedstock. The limiting factors include soil organic carbon, wind and water erosion, plant nutrient balance, soil water and temperature dynamics, soil compaction, and off-site environmental impacts. Initial evaluations using the Revised Universal Soil Loss Equation 2.0 (RUSLE2) show that a single factor analysis based on simply meeting tolerable soil loss might indicate stover could be harvested sustainably, but the same analysis based on maintaining soil organic carbon shows the practice to be non-sustainable. Modifying agricultural management to include either annual or perennial cover crops is shown to meet both soil erosion and soil carbon requirements. The importance of achieving high yields and planning in a holistic manner at the landscape scale are also shown to be crucial for balancing limitations and drivers associated with renewable bioenergy production.

  13. A thirty-two clock hour driver education classroom curriculum guide 

    E-Print Network [OSTI]

    Richardson, William Lee

    1990-01-01T23:59:59.000Z

    A THIRTY-TWO CLOCK HOUR DRIVER EDUCATION CLASSROOM CURRICULUM GUIDE A R e c o r d o f St u d y by WILLIAM LEE RICHARDSON S u b m i t t e d t o t h e O f f i c e o f G r a d u a t e S t u d i e s o f Texas A&M U n i v e r s i t y i n p a r t i... a l f u l f i l l m e n t o f t h e r e q u i r e m e n t s f o r t h e de g r e e o f DOCTOR OF EDUCATION December 1990 M a j o r S u b j e c t : I n d u s t r i a l E d u c a t i o n A THIRTY-TWO CLOCK HOUR DRIVER EDUCATION CLASSROOM...

  14. Supernova Sweeping and Black-Hole Feedback in Elliptical Galaxies

    E-Print Network [OSTI]

    Voit, G M; O'Shea, B W; Bryan, G L; Sun, M; Werner, N

    2015-01-01T23:59:59.000Z

    Most of the massive elliptical galaxies in the universe stopped forming stars billions of years ago, even though plenty of hot gas remains available for star formation. Here we present compelling evidence indicating that quenching of star formation depends on both black-hole feedback and Type Ia supernova heating. We analyze Chandra X-ray observations of ten massive ellipticals, five with extended, potentially star-forming multiphase gas and five single-phase ellipticals with no star formation. The ratio of cooling time to freefall time at 1--10 kpc in the multiphase galaxies is tc/tff ~10, indicating that precipitation-driven feedback limits cooling but does not eliminate condensation. In the same region of the single-phase galaxies, the radial profiles of gas entropy are consistent with a thermally stable (tc/tff > 20) supernova-driven outflow that sweeps stellar ejecta out of the galaxy. However, in one of those single-phase ellipticals (NGC 4261) we find tc/tff < 10 at < 300 pc. Notably, its jets ar...

  15. Feedbacks in a simple prognostic tropical climate model

    SciTech Connect (OSTI)

    Sherwood, S.C. (Scripps Institution of Oceanography, La Jolla, CA (United States))

    1999-07-01T23:59:59.000Z

    A simple four-cell model of the tropical atmosphere in equilibrium with its boundaries is introduced, which can support a variable diabatic circulation and prognostic temperature and humidity profiles. The model is used to predict atmospheric perturbations away from the observed base state. Prognostic variables include radiation, surface fluxes, and dynamic transports, with temperature and water vapor levels determined by conservation constraints. The model includes a specially developed water vapor scheme that performs favorably compared with observations. The model is used to simulate the local and nonlocal sensitivity of the tropical maritime atmosphere to changes in surface temperature and other boundary conditions at very large horizontal scales. The main findings are as follows: (i) The sensitivity of boundary layer convergence to sea surface temperature (SST) variations depends on the behavior of convective heating over cooler regions and may be overestimated by heuristic models that ignore or oversimplify thermodynamic and radiative constraints; (ii) The maintenance of humidity equilibrium over weakly convective areas is modulated by local radiative feedback; (iii) Evaporation feedbacks on SST may be overestimated by heuristic arguments that do not carefully treat atmospheric water transport. An explanation for the constant-relative humidity behavior of general circulation models under climate changes is also offered based on the results.

  16. Cloud Feedbacks on Climate: A Challenging Scientific Problem

    ScienceCinema (OSTI)

    Norris, Joe [Scripps Institution of Oceanography, University of California, San Diego, California, USA

    2010-09-01T23:59:59.000Z

    One reason it has been difficult to develop suitable social and economic policies to address global climate change is that projected global warming during the coming century has a large uncertainty range. The primary physical cause of this large uncertainty range is lack of understanding of the magnitude and even sign of cloud feedbacks on the climate system. If Earth's cloudiness responded to global warming by reflecting more solar radiation back to space or allowing more terrestrial radiation to be emitted to space, this would mitigate the warming produced by increased anthropogenic greenhouse gases. Contrastingly, a cloud response that reduced solar reflection or terrestrial emission would exacerbate anthropogenic greenhouse warming. It is likely that a mixture of responses will occur depending on cloud type and meteorological regime, and at present, we do not know what the net effect will be. This presentation will explain why cloud feedbacks have been a challenging scientific problem from the perspective of theory, modeling, and observations. Recent research results on observed multidecadal cloud-atmosphere-ocean variability over the Pacific Ocean will also be shown, along with suggestions for future research.

  17. Cloud Feedbacks on Climate: A Challenging Scientific Problem

    SciTech Connect (OSTI)

    Norris, Joel (Scripps Institution of Oceanography, UC San Diego) [Scripps Institution of Oceanography, UC San Diego

    2010-05-10T23:59:59.000Z

    One reason it has been difficult to develop suitable social and economic policies to address global climate change is that projected global warming during the coming century has a large uncertainty range. The primary physical cause of this large uncertainty range is lack of understanding of the magnitude and even sign of cloud feedbacks on the climate system. If Earth's cloudiness responded to global warming by reflecting more solar radiation back to space or allowing more terrestrial radiation to be emitted to space, this would mitigate the warming produced by increased anthropogenic greenhouse gases. Contrastingly, a cloud response that reduced solar reflection or terrestrial emission would exacerbate anthropogenic greenhouse warming. It is likely that a mixture of responses will occur depending on cloud type and meteorological regime, and at present, we do not know what the net effect will be. This presentation will explain why cloud feedbacks have been a challenging scientific problem from the perspective of theory, modeling, and observations. Recent research results on observed multidecadal cloud-atmosphere-ocean variability over the Pacific Ocean will also be shown, along with suggestions for future research.

  18. Measuring AGN Feedback with the Sunyaev-Zel'dovich Effect

    E-Print Network [OSTI]

    Evan Scannapieco; Robert J. Thacker; H. M. P. Couchman

    2007-09-06T23:59:59.000Z

    One of the most important and poorly-understood issues in structure formation is the role of outflows driven by active galactic nuclei (AGN). Using large-scale cosmological simulations, we compute the impact of such outflows on the small-scale distribution of the cosmic microwave background (CMB). Like gravitationally-heated structures, AGN outflows induce CMB distortions both through thermal motions and peculiar velocities, by processes known as the thermal and kinetic Sunyaev-Zel'dovich (SZ) effects, respectively. For AGN outflows the thermal SZ effect is dominant, doubling the angular power spectrum on arcminute scales. But the most distinct imprint of AGN feedback is a substantial increase in the thermal SZ distortions around elliptical galaxies, post-starburst ellipticals, and quasars, which is linearly proportional to the outflow energy. While point source subtraction is difficult for quasars, we show that by appropriately stacking microwave measurements around early-type galaxies, the new generation of small-scale microwave telescopes will be able to directly measure AGN feedback at the level important for current theoretical models.

  19. Authorization and Driving History Form The following information will be retained on file by all agencies on their drivers authorized to operate a

    E-Print Network [OSTI]

    Harms, Kyle E.

    agencies on their drivers authorized to operate a State vehicle, or a private vehicle for state purposes ___________________________________________ Position: Staff_____ Faculty_____ Student_____ Is employee's primary purpose to drive vehicles? Yes_____ No/her private vehicle in the course and scope of employment? Yes_____ No_____ Date of last Driver Training

  20. Threat Assessment Design for Driver Assistance System at Intersections Georges S. Aoude, Brandon D. Luders, Kenneth K. H. Lee, Daniel S. Levine, and Jonathan P. How

    E-Print Network [OSTI]

    How, Jonathan P.

    Threat Assessment Design for Driver Assistance System at Intersections Georges S. Aoude, Brandon D, potentially errant, drivers. Our approach relies on a novel threat assessment module, which combines an intention predictor based on support vector machines with an efficient threat assessor using rapidly

  1. Factors influencing field performance: utilizing the drug evaluation and classificaiton (DEC) program to identify suspected impaired drivers as reported by selected certified police officers in Texas

    E-Print Network [OSTI]

    Walden, Melissa Noggle

    2009-05-15T23:59:59.000Z

    impaired drivers. Specifically, this study explored how particular factors observed as part of the DEC Program’s decision-making process influence the DRE’s prediction of a drug category that was impairing a suspected impaired driver in the enforcement...

  2. Materials from 2014 SunShot Summit Breakout Session: Looking...

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

    Breakout Session: Looking Ahead: PV Manufacturing in 10 Years Materials from 2014 SunShot Summit Breakout Session: Looking Ahead: PV Manufacturing in 10 Years This was a breakout...

  3. AN IMPROVED SOFT FEEDBACK V-BLAST DETECTION TECHNIQUE FOR TURBO-MIMO SYSTEMS

    E-Print Network [OSTI]

    Singer, Andrew C

    AN IMPROVED SOFT FEEDBACK V-BLAST DETECTION TECHNIQUE FOR TURBO-MIMO SYSTEMS Jun Won Choi*, Andrew-demapper) and the channel decoder exchange soft (extrinsic) information to iteratively improve system perfor- mance. Hence In this paper, an improved minimum mean square error (MMSE) soft feedback detector, called the soft input, soft

  4. Closed Loop System with Feedback Control MISO control laws SISO control law

    E-Print Network [OSTI]

    Ben-Yakar, Adela

    Closed Loop System with Feedback Control MISO control laws SISO control law Switching Control demand · Two control modes for wind turbine: MISO & SISO · Proportional Integral (PI) feedback control Modes MISO SISO Inputs Blade Pitch Angle, Generator Torque Blade Pitch Angle Output Power Power

  5. American Institute of Aeronautics and Astronautics A FEEDBACK LINEARIZING CONTROLLER FOR RELATIVE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    American Institute of Aeronautics and Astronautics 1 A FEEDBACK LINEARIZING CONTROLLER FOR RELATIVE keeping behind a leading aircraft. The investigated approach is based on feedback linearization control. In [4] and [10], the control system was designed on a linearized model, whereas in [8] the proposed

  6. External-feedback laser cooling of molecular gases Vladan Vuleti and James K. Thompson

    E-Print Network [OSTI]

    Vuletic, Vladan

    results in a friction force. In stochastic cooling in particle accelerators 2 , an electronic delay­13 . For accelerators, an opti- cal version of stochastic cooling has also been proposed 14 . The feedback cooling, a sam- ple's center-of-mass oscillation has been damped 21 by feedback. A method using an optical

  7. Rendering of Environmental Force Feedback in Mobile Robot Teleoperation based on Fuzzy Logic

    E-Print Network [OSTI]

    Ryu, Jee-Hwan

    Rendering of Environmental Force Feedback in Mobile Robot Teleoperation based on Fuzzy Logic Ildar Farkhatdinov, Jee-Hwan Ryu and Jury Poduraev Abstract-- In this paper a study on rendering of environmen- tal to the distance between the obstacles and the mobile robot. In previous approaches force feedback was rendered

  8. Feedback Control of MHD kink instabilities on the HBT-EP tokamak

    E-Print Network [OSTI]

    · Theory and modeling tell us that minimizing the control coil- resistive wall coupling (mutual inductanceFeedback Control of MHD kink instabilities on the HBT-EP tokamak David A. Maurer American Physical Society April Meeting 5th April 2003 Philadelphia, Pennsylvania #12;Feedback Control of MHD kink

  9. User Monitor & Feedback Mechanism for Social Scientific Study on Laptop Energy Reduction

    E-Print Network [OSTI]

    Stamp, Mark

    change among laptop users via interactive energy-usage feedback with college students as the initiali User Monitor & Feedback Mechanism for Social Scientific Study on Laptop Energy Reduction SCIENTIFIC STUDY ON LAPTOP ENERGY REDUCTION by Namrata Buddhadev APPROVED FOR THE DEPARTMENT OF COMPUTER

  10. Nonlinear Feedback Controllers and Compensators: A StateDependent Riccati Equation Approach

    E-Print Network [OSTI]

    rules that allow the modeler and designer to make trade­o#s between control e#ort and output error) techniques are rapidly emerging as general design and synthesis methods of nonlinear feedback controllers­based feedback controllers. 1 Introduction Linear quadratic regulation (LQR) is a well established, accepted

  11. Nonlinear Feedback Controllers and Compensators: A State-Dependent Riccati Equation Approach

    E-Print Network [OSTI]

    rules that allow the modeler and designer to make trade-offs between control effort and output error) techniques are rapidly emerging as general design and synthesis methods of nonlinear feedback controllers-based feedback controllers. 1 Introduction Linear quadratic regulation (LQR) is a well established, accepted

  12. The Impact of Stochastic Noisy Feedback on Distributed Network Utility Maximization

    E-Print Network [OSTI]

    Reisslein, Martin

    The Impact of Stochastic Noisy Feedback on Distributed Network Utility Maximization Junshan Zhang of distributed network utility maximization (NUM) algorithms hinges heavily on information feedback through, that the iterates generated by distributed P-D algorithms converge with probability one to the optimal point, under

  13. EvaluatingMobilePhonesasEnergyConsumptionFeedbackDevices MarkusWeiss*

    E-Print Network [OSTI]

    EvaluatingMobilePhonesasEnergyConsumptionFeedbackDevices MarkusWeiss* ,ClaireManagement,ETHZurich Abstract. With smart electricity meters being widely deployed, data on residential energy usage of mobile phones as an interface to provide feedback on overall and de- vice-related energy consumption

  14. Simulated Arctic atmospheric feedbacks associated with late summer sea ice anomalies

    E-Print Network [OSTI]

    Moore, John

    Simulated Arctic atmospheric feedbacks associated with late summer sea ice anomalies A. Rinke,1,2 K depend on regional and decadal variations in the coupled atmosphere-ocean-sea ice system. Citation: Rinke to investigate feedbacks between September sea ice anomalies in the Arctic and atmospheric conditions in autumn

  15. Some consideration on the (in)effectiveness of residential energy feedback systems

    E-Print Network [OSTI]

    Paulos, Eric

    Mellon University, USA {jjpierce, chloefan, jlomas, gmarcu, paulos}@cs.cmu.edu ABSTRACT Energy feedback concerning household energy consumption, a number of studies have investigated the "effectiveness" of variousSome consideration on the (in)effectiveness of residential energy feedback systems James Pierce

  16. Effects of Peer Feedback on Contribution: A Field Experiment in Wikipedia

    E-Print Network [OSTI]

    Mankoff, Jennifer

    ' contributions over time. Prior studies on peer feedback in online communities have suggested its impactEffects of Peer Feedback on Contribution: A Field Experiment in Wikipedia Haiyi Zhu, Amy Zhang on contribution, but have been limited by their correlational nature. In this paper, we conducted a field

  17. Dynamic Feedback Control of XYnR Planar Robots with n

    E-Print Network [OSTI]

    De Luca, Alessandro

    Dynamic Feedback Control of XYnR¯ Planar Robots with n Rotational Passive Joints Stefano Iannitti for an XYnR¯ planar robot with the first two joints (rotational or prismatic) actuated and n rotational be exploited to recursively design a dy- namic feedback that completely linearizes the system equations. We use

  18. Tropical Water Vapor and Cloud Feedbacks in Climate Models: A Further Assessment Using Coupled Simulations

    E-Print Network [OSTI]

    Sun, Dezheng

    ). A small change in these radiative effects of water vapor and clouds can either offset or greatly amplify global warming, we find no significant correlation between the inter-model variations in the cloud albedo feedback during ENSO and the inter-model variations in the cloud albedo feedback during global warming

  19. Feedback from the first stars and galaxies and its influence on structure formation

    E-Print Network [OSTI]

    Benedetta Ciardi

    2007-09-10T23:59:59.000Z

    Once the first sources have formed, their mass deposition, energy injection and emitted radiation can deeply affect the subsequent galaxy formation process and influence the evolution of the IGM via a number of so-called feedback effects. The word 'feedback' is by far one of the most used in modern cosmology, where it is applied to a vast range of situations and astrophysical objects. Generally speaking, the concept of feedback invokes a back reaction of a process on itself or on the causes that have produced it. The character of feedback can be either negative or positive. Here, I will review the present status of investigation of the feedback effects from the first stars and galaxies.

  20. A feedback compression star formation model and the black hole - bulge relations

    E-Print Network [OSTI]

    Bing-Xiao Xu; Xue-Bing Wu

    2007-06-05T23:59:59.000Z

    We present a "feedback compression" model to describe the galactic spheroid formation and its relation with the central nuclear activity. We suggest that the star formation itself can serve as the "positive feedback" in some extremely dense region to trigger the starburst. The star formation rate as well as the related stellar feedback-induced turbulence will be maximized under the regulation of the background dark halo's gravity. There is also stellar feedback acting inward to confine and obscure the central black hole (BH) till the BH grows sufficiently large to satisfy a balance condition between the accretion disk wind and the inward stellar feedback. The extremely vigorous star formation activity, the BH - bulge relations, the maximum velocity dispersion as well as the maximum BH mass are investigated based on such scenario, and are found to be consistent with observations.

  1. Motor Vehicle Crash Fatalities and Injuries: An Analysis of the Relationship of Roadway, Driver, Vehicle Characteristics in Oregon

    E-Print Network [OSTI]

    Bertini, Robert L.

    Motor Vehicle Crash Fatalities and Injuries: An Analysis of the Relationship of Roadway, Driver, Vehicle Characteristics in Oregon Motor Vehicle Crash Fatalities and Injuries: An Analysis,000 population among Oregon counties from 2000-2005 ranged from 6.64-211.17. In the event of a severe motor

  2. Driving, Aging & Dementia: On-Line Resources Division of Motor Vehicles & Driver Licensing, Missouri Department of Revenue

    E-Print Network [OSTI]

    Driving, Aging & Dementia: On-Line Resources Missouri Division of Motor Vehicles & Driver Licensing for Responsible Driving, Inc. http://www.drivingsafe.org/ Alzheimer's Association, St. Louis Chapter (Driving & Driving (The Hartford Insurance Corp.) http://www.thehartford.com/alzheimers/ Family Conversations

  3. Mechanical Feedback: From stellar wind bubbles to starbursts

    E-Print Network [OSTI]

    M. S. Oey; C. J. Clarke; P. Massey

    2001-03-20T23:59:59.000Z

    The current understanding of mechanical feedback is reviewed by evaluating the standard, adiabatic model for shell formation and evolution. This model is relevant to phenomena ranging from individual stellar-wind bubbles to galactic superwinds, forming the basis for our understanding of the multiphase ISM, IGM, and galactic evolutionary processes. Although significant discrepancies between the model and observation have been identified, to date there are none that require a fundamental revision. A variety of evidence, ranging over three orders of magnitude in spatial scale, is broadly consistent with the standard model. This includes kinematics of individual objects, observations of hot gas, the size distribution of HI shells, and outflow rates from starburst galaxies. However, some of the most pressing issues relating to shell evolution are still outstanding and obstruct efforts to resolve key questions like the fate of the hot gas.

  4. Feedback Control of Turbulent Shear Flows by Genetic Programming

    E-Print Network [OSTI]

    Duriez, Thomas; von Krbek, Kai; Bonnet, Jean-Paul; Cordier, Laurent; Noack, Bernd R; Segond, Marc; Abel, Markus; Gautier, Nicolas; Aider, Jean-Luc; Raibaudo, Cedric; Cuvier, Christophe; Stanislas, Michel; Debien, Antoine; Mazellier, Nicolas; Kourta, Azeddine; Brunton, Steven L

    2015-01-01T23:59:59.000Z

    Turbulent shear flows have triggered fundamental research in nonlinear dynamics, like transition scenarios, pattern formation and dynamical modeling. In particular, the control of nonlinear dynamics is subject of research since decades. In this publication, actuated turbulent shear flows serve as test-bed for a nonlinear feedback control strategy which can optimize an arbitrary cost function in an automatic self-learning manner. This is facilitated by genetic programming providing an analytically treatable control law. Unlike control based on PID laws or neural networks, no structure of the control law needs to be specified in advance. The strategy is first applied to low-dimensional dynamical systems featuring aspects of turbulence and for which linear control methods fail. This includes stabilizing an unstable fixed point of a nonlinearly coupled oscillator model and maximizing mixing, i.e.\\ the Lyapunov exponent, for forced Lorenz equations. For the first time, we demonstrate the applicability of genetic p...

  5. Black hole feedback in the luminous quasar PDS 456

    E-Print Network [OSTI]

    Nardini, E; Gofford, J; Harrison, F A; Risaliti, G; Braito, V; Costa, M T; Matzeu, G A; Walton, D J; Behar, E; Boggs, S E; Christensen, F E; Craig, W W; Hailey, C J; Matt, G; Miller, J M; O'Brien, P T; Stern, D; Turner, T J; Ward, M J

    2015-01-01T23:59:59.000Z

    The evolution of galaxies is connected to the growth of supermassive black holes in their centers. During the quasar phase, a huge luminosity is released as matter falls onto the black hole, and radiation-driven winds can transfer most of this energy back to the host galaxy. Over five different epochs, we detected the signatures of a nearly spherical stream of highly ionized gas in the broadband X-ray spectra of the luminous quasar PDS 456. This persistent wind is expelled at relativistic speeds from the inner accretion disk, and its wide aperture suggests an effective coupling with the ambient gas. The outflow's kinetic power larger than 10^46 ergs per second is enough to provide the feedback required by models of black hole and host galaxy co-evolution.

  6. Feedback-induced oscillations in one-dimensional colloidal transport

    E-Print Network [OSTI]

    Ken Lichtner; Andrey Pototsky; Sabine H. L. Klapp

    2012-09-05T23:59:59.000Z

    We investigate a driven, one-dimensional system of colloidal particles in a periodically currogated narrow channel subject to a time-delayed feedback control. Our goal is to identify conditions under which the control induces oscillatory, time-periodic states. The investigations are based on the Fokker-Planck equation involving the density distribution of the system. First, by using the numerical continuation technique, we determine the linear stability of a stationary density. Second, the nonlinear regimes are analyzed by studying numerically the temporal evolution of the first moment of the density distribution. In this way we construct a bifurcation diagram revealing the nature of the instability. Apart from the case of a system with periodic boundary conditions, we also consider a microchannel of finite length. Finally, we study the influence of (repulsive) particle interactions based on Dynamical Density Functional Theory (DDFT).

  7. Radio-AGN Feedback: When the Little Ones were Monsters

    E-Print Network [OSTI]

    Williams, W L

    2015-01-01T23:59:59.000Z

    We present a study of the evolution of the fraction of radio-loud active galactic nuclei (AGN) as a function of their host stellar mass. We make use of two samples of radio galaxies: one in the local universe, $0.01 10^{24}$ W/Hz at z ~ 1-2 while the radio-loud fraction for higher mass galaxies ($M_* > 10^{11.25}$ M$_{\\odot}$) remains the same. We argue that this increase is driven largely by the increase in cold or radiative mode accretion with increasing cold gas supply at earlier epochs. The increasing population of low mass Radio-Loud AGN can thus explain the upturn in the Radio Luminosity Function (RLF) at high redshift which is important for understanding the impact of AGN feedback in galaxy evolution.

  8. Real-time calibration of a feedback trap

    SciTech Connect (OSTI)

    Gavrilov, Mom?ilo; Jun, Yonggun; Bechhoefer, John, E-mail: johnb@sfu.ca [Department of Physics, Simon Fraser University, Burnaby, British Columbia V5A 1S6 (Canada)

    2014-09-15T23:59:59.000Z

    Feedback traps use closed-loop control to trap or manipulate small particles and molecules in solution. They have been applied to the measurement of physical and chemical properties of particles and to explore fundamental questions in the non-equilibrium statistical mechanics of small systems. These applications have been hampered by drifts in the electric forces used to manipulate the particles. Although the drifts are small for measurements on the order of seconds, they dominate on time scales of minutes or slower. Here, we show that a recursive maximum likelihood (RML) algorithm can allow real-time measurement and control of electric and stochastic forces over time scales of hours. Simulations show that the RML algorithm recovers known parameters accurately. Experimental estimates of diffusion coefficients are also consistent with expected physical properties.

  9. Feedback-controlled laser fabrication of micromirror substrates

    E-Print Network [OSTI]

    Benjamin Petrak; Kumarasiri Konthasinghe; Sonia Perez; Andreas Muller

    2012-06-11T23:59:59.000Z

    Short (40-200 microseconds) single focused CO2 laser pulses of energy of about 100 microJ were used to fabricate high quality concave micromirror templates on silica and fluoride glass. The ablated features have diameters of 20-100 microns and average root-mean-square (RMS) surface microroughness near their center of less than 0.2 nm. Temporally monitoring the fabrication process revealed that it proceeds on a time scale shorter than the laser pulse duration. We implement a fast feedback control loop (20 kHz bandwidth) based on the light emitted by the sample that ensures an RMS size dispersion of less than 5 percent in arrays on chips or in individually fabricated features on an optical fiber tip, a significant improvement over previous approaches using longer pulses and open loop operation.

  10. Controlling unstable chaos: Stabilizing chimera states by feedback

    E-Print Network [OSTI]

    Jan Sieber; Oleh Omel'chenko; Matthias Wolfrum

    2013-12-18T23:59:59.000Z

    We present a control scheme that is able to find and stabilize an unstable chaotic regime in a system with a large number of interacting particles. This allows us to track a high dimensional chaotic attractor through a bifurcation where it loses its attractivity. Similar to classical delayed feedback control, the scheme is non-invasive, however, only in an appropriately relaxed sense considering the chaotic regime as a statistical equilibrium displaying random fluctuations as a finite size effect. We demonstrate the control scheme for so-called chimera states, which are coherence-incoherence patterns in coupled oscillator systems. The control makes chimera states observable close to coherence, for small numbers of oscillators, and for random initial conditions.

  11. Maxwell's demon in biochemical signal transduction with feedback loop

    E-Print Network [OSTI]

    Sosuke Ito; Takahiro Sagawa

    2015-04-15T23:59:59.000Z

    Signal transduction in living cells is vital to maintain life itself, where information transfer in noisy environment plays a significant role. In a rather different context, the recent intensive researches of "Maxwell's demon" - a feedback controller that utilizes information of individual molecules - has led to a unified theory of information and thermodynamics. Here we combine these two streams of researches, and show that the second law of thermodynamics with information reveals the fundamental limit of the robustness of signal transduction against environmental fluctuations. Especially, we found that the degree of robustness is quantitatively characterized by an informational quantity called transfer entropy. Our information-thermodynamic approach is applicable to biological communication inside cells, in which there is no explicit channel coding in contrast to artificial communication. Our result would open up a novel biophysical approach to understand information processing in living systems on the basis of the fundamental information-thermodynamics link.

  12. Measuring AGN Feedback with the Sunyaev-Zel'dovich Effect

    E-Print Network [OSTI]

    Scannapieco, Evan; Couchman, H M P

    2007-01-01T23:59:59.000Z

    One of the most important and poorly-understood issues in structure formation is the role of outflows driven by active galactic nuclei (AGN). Using large-scale cosmological simulations, we compute the impact of such outflows on the small-scale distribution of the cosmic microwave background (CMB). Like gravitationally-heated structures, AGN outflows induce CMB distortions both through thermal motions and peculiar velocities, by processes known as the thermal and kinetic Sunyaev-Zel'dovich (SZ) effects, respectively. For AGN outflows the thermal SZ effect is dominant, doubling the angular power spectrum on arcminute scales. But the most distinct imprint of AGN feedback is a substantial increase in the thermal SZ distortions around elliptical galaxies, post-starburst ellipticals, and quasars, which is linearly proportional to the outflow energy. While point source subtraction is difficult for quasars, we show that by appropriately stacking microwave measurements around early-type galaxies, the new generation of...

  13. Multistable jittering in oscillators with pulsatile delayed feedback

    E-Print Network [OSTI]

    Vladimir Klinshov; Leonhard Lücken; Dmitry Shchapin; Vladimir Nekorkin; Serhiy Yanchuk

    2015-05-27T23:59:59.000Z

    Oscillatory systems with time-delayed pulsatile feedback appear in various applied and theoretical research areas, and received a growing interest in the last years. For such systems, we report a remarkable scenario of destabilization of a periodic regular spiking regime. In the bifurcation point numerous regimes with non-equal interspike intervals emerge simultaneously. We show that this bifurcation is triggered by the steepness of the oscillator's phase resetting curve and that the number of the emerging, so-called "jittering" regimes grows exponentially with the delay value. Although this appears as highly degenerate from a dynamical systems viewpoint, the "multi-jitter" bifurcation occurs robustly in a large class of systems. We observe it not only in a paradigmatic phase-reduced model, but also in a simulated Hodgkin-Huxley neuron model and in an experiment with an electronic circuit.

  14. Generalization of neuron network model with delay feedback

    E-Print Network [OSTI]

    Sanjeet Maisnam; R. K. Brojen Singh

    2015-07-16T23:59:59.000Z

    We present generalized delayed neural network (DNN) model with positive delay feedback and neuron history. The local stability analysis around trivial local equilibria of delayed neural networks has applied and determine the conditions for the existence of zero root. We develop few innovative delayed neural network models in different dimensions through transformation and extension of some existing models. We found that zero root can have multiplicity two under certain conditions. We further show how the characteristic equation can have zero root and its multiplicity is dependent on the conditions undertaken. Finally, we generalize the neural network of $N$ neurons through which we determine the general form of Jacobian of the linear form and corresponding characteristic equation of the system.

  15. Local and Global Radiative Feedback from Population III Star Formation

    E-Print Network [OSTI]

    O'Shea, Brian W

    2010-01-01T23:59:59.000Z

    We present an overview of recent work that focuses on understanding the radiative feedback processes that are potentially important during Population III star formation. Specifically, we examine the effect of the Lyman-Werner (photodissociating) background on the early stages of primordial star formation, which serves to delay the onset of star formation in a given halo but never suppresses it entirely. We also examine the effect that both photodissociating and ionizing radiation in I-fronts from nearby stellar systems have on the formation of primordial protostellar clouds. Depending on the strength of the incoming radiation field and the central density of the halos, Pop III star formation can be suppressed, unaffected, or even enhanced. Understanding these and other effects is crucial to modeling Population III star formation and to building the earliest generations of galaxies in the Universe.

  16. Massive stars: Feedback effects in the local universe

    E-Print Network [OSTI]

    M. S. Oey; C. J. Clarke

    2007-03-02T23:59:59.000Z

    We examine self-consistent parameterizations of the high-mass stellar population and resulting feedback, including mechanical, radiative, and chemical feedback, as we understand them locally. To date, it appears that the massive star population follows simple power-law clustering that extends down to individual field OB stars, and the robust stellar IMF seems to have a constant upper-mass limit. These properties result in specific patterns in the HII region LF and ionization of the diffuse, warm ionized medium. The resulting SNe generate superbubbles whose size distribution is also described by a simple power law, and from which a galaxy's porosity parameter is easily derived. A critical star-formation threshold can then be estimated, above which the escape of Lyman continuum photons, hot gas, and nucleosynthetic products is predicted. A first comparison with a large H-alpha sample of galaxies is broadly consistent with this prediction, and suggests that ionizing photons likely escapes from starburst galaxies. The superbubble size distribution also offers a basis for a Simple Inhomogeneous Model for galactic chemical evolution, which is especially relevant to metal-poor systems and instantaneous metallicity distributions. This model offers an alternative interpretation of the Galactic halo metallicity distribution and emphasizes the relative importance of star-formation intensity, in addition to age, in a system's evolution. The fraction of zero-metallicity, Population III stars is easily predicted for any such model. We emphasize that all these phenomena can be modeled in a simple, analytic framework over an extreme range in scale, offering powerful tools for understanding the role of massive stars in the cosmos. (Abridged)

  17. Dual Feedback Controlled High Performance Ar Seeded ELMy H-mode Discharges in JET including Trace Tritium Experiments

    E-Print Network [OSTI]

    Dual Feedback Controlled High Performance Ar Seeded ELMy H-mode Discharges in JET including Trace Tritium Experiments

  18. IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 62, NO. 4, FEBRUARY 15, 2014 993 Adaptive Limited Feedback for MISO Wiretap

    E-Print Network [OSTI]

    Swindlehurst, A. Lee

    Feedback for MISO Wiretap Channels With Cooperative Jamming Minyan Pei, A. Lee Swindlehurst, Fellow, IEEE--Cooperative jamming, feedback bits allocation, limited feedback, MISO wiretap channel. I. INTRODUCTION P HYSICAL layer for mul- tiple-input single-output (MISO) wiretap channels, which have Manuscript received May 30, 2013

  19. IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 42, NO. 4, APRIL 1997 473 Robust Feedback Stabilization of Chemical Reactors

    E-Print Network [OSTI]

    Bastin, Georges

    of the controllers. Index Terms--Chemical reactors, robust feedback stabilization, robust observer, temperature control. I. INTRODUCTION THE DESIGN of stabilizing feedback control laws for unstable chemical reactors.g., [2]). The feedback control of chemical reactors is a problem which is made difficult by the inherent

  20. Feedback: Towards Dynamic Behavior and Secure Routing for Wireless Sensor Zhen Cao, Jianbin Hu, Zhong Chen, Maoxing Xu, Xia Zhou

    E-Print Network [OSTI]

    Ramkumar, Mahalingam

    Feedback: Towards Dynamic Behavior and Secure Routing for Wireless Sensor Networks Zhen Cao, Peking University Network and Information Security Laboratory Beijing, China { caozhen, hjbin, chen, xumx feedback based secure routing proto- col. Feedback, from both the nearby neighbors and base stations