National Library of Energy BETA

Sample records for fault location control

  1. Optimal fault location 

    E-Print Network [OSTI]

    Knezev, Maja

    2008-10-10

    sequence of events newly obtained recording belongs. Software prototype of the proposed automated fault location analysis is developed using Java programming language. Fault location analysis is automatically triggered by appearance of new event files in a...

  2. Optimized Fault Location Final Project Report

    E-Print Network [OSTI]

    Optimized Fault Location Final Project Report Power Systems Engineering Research Center A National Engineering Research Center Optimized Fault Location Concurrent Technologies Corporation Final Project Report

  3. Fault Locating, Prediction and Protection (FLPPS)

    SciTech Connect (OSTI)

    Yinger, Robert, J.; Venkata, S., S.; Centeno, Virgilio

    2010-09-30

    One of the main objectives of this DOE-sponsored project was to reduce customer outage time. Fault location, prediction, and protection are the most important aspects of fault management for the reduction of outage time. In the past most of the research and development on power system faults in these areas has focused on transmission systems, and it is not until recently with deregulation and competition that research on power system faults has begun to focus on the unique aspects of distribution systems. This project was planned with three Phases, approximately one year per phase. The first phase of the project involved an assessment of the state-of-the-art in fault location, prediction, and detection as well as the design, lab testing, and field installation of the advanced protection system on the SCE Circuit of the Future located north of San Bernardino, CA. The new feeder automation scheme, with vacuum fault interrupters, will limit the number of customers affected by the fault. Depending on the fault location, the substation breaker might not even trip. Through the use of fast communications (fiber) the fault locations can be determined and the proper fault interrupting switches opened automatically. With knowledge of circuit loadings at the time of the fault, ties to other circuits can be closed automatically to restore all customers except the faulted section. This new automation scheme limits outage time and increases reliability for customers. The second phase of the project involved the selection, modeling, testing and installation of a fault current limiter on the Circuit of the Future. While this project did not pay for the installation and testing of the fault current limiter, it did perform the evaluation of the fault current limiter and its impacts on the protection system of the Circuit of the Future. After investigation of several fault current limiters, the Zenergy superconducting, saturable core fault current limiter was selected for installation. Because of some testing problems with the Zenergy fault current limiter, installation was delayed until early 2009 with it being put into operation on March 6, 2009. A malfunction of the FCL controller caused the DC power supply to the superconducting magnet to be turned off. This inserted the FCL impedance into the circuit while it was in normal operation causing a voltage resonance condition. While these voltages never reached a point where damage would occur on customer equipment, steps were taken to insure this would not happen again. The FCL was reenergized with load on December 18, 2009. A fault was experienced on the circuit with the FCL in operation on January 14, 2010. The FCL operated properly and reduced the fault current by about 8%, what was expected from tests and modeling. As of the end of the project, the FCL was still in operation on the circuit. The third phase of the project involved the exploration of several advanced protection ideas that might be at a state where they could be applied to the Circuit of the Future and elsewhere in the SCE electrical system. Based on the work done as part of the literature review and survey, as well as a number of internal meetings with engineering staff at SCE, a number of ideas were compiled. These ideas were then evaluated for applicability and ability to be applied on the Circuit of the Future in the time remaining for the project. Some of these basic ideas were implemented on the circuit including measurement of power quality before and after the FCL. It was also decided that we would take what was learned as part of the Circuit of the Future work and extend it to the next generation circuit protection for SCE. Also at this time, SCE put in a proposal to the DOE for the Irvine Smart Grid Demonstration using ARRA funding. SCE was successful in obtaining funding for this proposal, so it was felt that exploration of new protection schemes for this Irvine Smart Grid Demonstration would be a good use of the project resources. With this in mind, a protection system that uses fault interrupting switches, hi

  4. VCSEL fault location apparatus and method

    DOE Patents [OSTI]

    Keeler, Gordon A. (Albuquerque, NM); Serkland, Darwin K. (Albuquerque, NM)

    2007-05-15

    An apparatus for locating a fault within an optical fiber is disclosed. The apparatus, which can be formed as a part of a fiber-optic transmitter or as a stand-alone instrument, utilizes a vertical-cavity surface-emitting laser (VCSEL) to generate a test pulse of light which is coupled into an optical fiber under test. The VCSEL is subsequently reconfigured by changing a bias voltage thereto and is used as a resonant-cavity photodetector (RCPD) to detect a portion of the test light pulse which is reflected or scattered from any fault within the optical fiber. A time interval .DELTA.t between an instant in time when the test light pulse is generated and the time the reflected or scattered portion is detected can then be used to determine the location of the fault within the optical fiber.

  5. Locating hardware faults in a parallel computer

    DOE Patents [OSTI]

    Archer, Charles J.; Megerian, Mark G.; Ratterman, Joseph D.; Smith, Brian E.

    2010-04-13

    Locating hardware faults in a parallel computer, including defining within a tree network of the parallel computer two or more sets of non-overlapping test levels of compute nodes of the network that together include all the data communications links of the network, each non-overlapping test level comprising two or more adjacent tiers of the tree; defining test cells within each non-overlapping test level, each test cell comprising a subtree of the tree including a subtree root compute node and all descendant compute nodes of the subtree root compute node within a non-overlapping test level; performing, separately on each set of non-overlapping test levels, an uplink test on all test cells in a set of non-overlapping test levels; and performing, separately from the uplink tests and separately on each set of non-overlapping test levels, a downlink test on all test cells in a set of non-overlapping test levels.

  6. A fault location approach for fuzzy fault section estimation on radial distribution feeders 

    E-Print Network [OSTI]

    Andoh, Kwame Sarpong

    2000-01-01

    Locating the faulted section of a distribution system is a difficult task because of lack of accurate system models and the presence of uncertainty in the data used for estimating the fault section. Many of the methods used to account...

  7. Stress and fault rock controls on fault zone hydrology, Coso...

    Open Energy Info (EERE)

    fault zone hydrology, Coso geothermal field, CA Abstract In crystalline rock of the Coso Geothermal Field, CA, fractures are the primary source of permeability. At reservoir...

  8. Locating an active fault zone in Coso geothermal field by analyzing...

    Open Energy Info (EERE)

    Locating an active fault zone in Coso geothermal field by analyzing seismic guided waves from microearthquake data Jump to: navigation, search OpenEI Reference LibraryAdd to...

  9. Fault Tolerant Oxygen Control of a Diesel Engine Air System

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Fault Tolerant Oxygen Control of a Diesel Engine Air System Rainer Nitsche Matthias Bitzer control problem of a Diesel engine air system having a jammed Exhaust Gas Recirculation (EGR) valve of the air system. Keywords: Fault tolerant control, Diesel engine, Air system, Model-based trajectory

  10. ALLIANCE: An Architecture for Fault Tolerant, Cooperative Control of Heterogeneous Mobile Robots

    E-Print Network [OSTI]

    Parker, Lynne E.

    ALLIANCE: An Architecture for Fault Tolerant, Cooperative Control of Heterogeneous Mobile Robots ALLIANCE, that utilizes adaptive action selection to achieve fault toler- ant cooperative control in robot demonstration. These experiments illustrate the ability of ALLIANCE to achieve adaptive, fault

  11. Improving Distribution System Reliability Through Risk-base Doptimization of Fault Management and Improved Computer-based Fault Location 

    E-Print Network [OSTI]

    Dong, Yimai

    2013-11-07

    regulation on power quality. Optimization in fault management tasks has the potential of improving system reliability by reducing the duration and scale of outages caused by faults through fast fault isolation and service restoration. The research reported...

  12. Controls on Fault-Hosted Fluid Flow: Preliminary Results from...

    Open Energy Info (EERE)

    Controls on Fault-Hosted Fluid Flow: Preliminary Results from the Coso Geothermal Field, CA Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference...

  13. Locating hardware faults in a data communications network of a parallel computer

    DOE Patents [OSTI]

    Archer, Charles J. (Rochester, MN); Megerian, Mark G. (Rochester, MN); Ratterman, Joseph D. (Rochester, MN); Smith, Brian E. (Rochester, MN)

    2010-01-12

    Hardware faults location in a data communications network of a parallel computer. Such a parallel computer includes a plurality of compute nodes and a data communications network that couples the compute nodes for data communications and organizes the compute node as a tree. Locating hardware faults includes identifying a next compute node as a parent node and a root of a parent test tree, identifying for each child compute node of the parent node a child test tree having the child compute node as root, running a same test suite on the parent test tree and each child test tree, and identifying the parent compute node as having a defective link connected from the parent compute node to a child compute node if the test suite fails on the parent test tree and succeeds on all the child test trees.

  14. Fault Localization in Embedded Control System Kai Liang, Zhuofu Bai, M. Cenk avusoglu, Andy Podgurski and Soumya Ray

    E-Print Network [OSTI]

    Ray, Soumya

    Fault Localization in Embedded Control System Software Kai Liang, Zhuofu Bai, M. Cenk Ã?avu--We describe an approach to automatically locating faulty statements in control code in embedded systems. Our and presented to the developer. We evaluate our approach on the control systems for two prototype robotic

  15. Evaluation of the location and recency of faulting near prospective surface facilities in Midway Valley, Nye County, Nevada

    SciTech Connect (OSTI)

    Swan, F.H.; Wesling, J.R.; Angell, M.M.; Thomas, A.P.; Whitney, J.W.; Gibson, J.D.

    2002-01-17

    Evaluation of surface faulting that may pose a hazard to prospective surface facilities is an important element of the tectonic studies for the potential Yucca Mountain high-level radioactive waste repository in southwestern Nevada. For this purpose, a program of detailed geologic mapping and trenching was done to obtain surface and near-surface geologic data that are essential for determining the location and recency of faults at a prospective surface-facilities site located east of Exile Hill in Midway Valley, near the eastern base of Yucca Mountain. The dominant tectonic features in the Midway Valley area are the north- to northeast-trending, west-dipping normal faults that bound the Midway Valley structural block-the Bow Ridge fault on the west side of Exile Hill and the Paint-brush Canyon fault on the east side of the valley. Trenching of Quaternary sediments has exposed evidence of displacements, which demonstrate that these block-bounding faults repeatedly ruptured the surface during the middle to late Quaternary. Geologic mapping, subsurface borehole and geophysical data, and the results of trenching activities indicate the presence of north- to northeast-trending faults and northwest-trending faults in Tertiary volcanic rocks beneath alluvial and colluvial sediments near the prospective surface-facilities site. North to northeast-trending faults include the Exile Hill fault along the eastern base of Exile Hill and faults to the east beneath the surficial deposits of Midway Valley. These faults have no geomorphic expression, but two north- to northeast-trending zones of fractures exposed in excavated profiles of middle to late Pleistocene deposits at the prospective surface-facilities site appear to be associated with these faults. Northwest-trending faults include the West Portal and East Portal faults, but no disruption of Quaternary deposits by these faults is evident. The western zone of fractures is associated with the Exile Hill fault. The eastern zone of fractures is within Quaternary alluvial sediments, but no bedrock was encountered in trenches and soil pits in this part of the prospective surface facilities site; thus, the direct association of this zone with one or more bedrock faults is uncertain. No displacement of lithologic contacts and soil horizons could be detected in the fractured Quaternary deposits. The results of these investigations imply the absence of any appreciable late Quaternary faulting activity at the prospective surface-facilities site.

  16. Driver expectancy in locating automotive controls 

    E-Print Network [OSTI]

    Francis, Dawn Suzette

    1990-01-01

    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...

  17. HEAT AND MASS TRANSFER IN A FAULT-CONTROLLED GEOTHERMAL RESERVOIR CHARGED AT CONSTANT PRESSURE

    E-Print Network [OSTI]

    Goyal, K.P.

    2013-01-01

    from the natural geothermal gradient ~T /L A quantitativegradients in a fault-controlled liquid dominated geothermalgradients in the fault-aquifer system. DEVELOPMENT OF CONCEPTUAL MODEL Studies of liquid-dominated geothermal

  18. Novel techniques for fault location, voltage profile calculation and visualization of transients 

    E-Print Network [OSTI]

    Evrenosoglu, Cansin Yaman

    2009-05-15

    techniques of voltage profiles along transmission lines. A simple yet effective approach to accurately and rapidly obtain the voltage profile along a transmission line during fault transients is presented. The objective of the presented method is to eliminate...

  19. A CONTROLLER FOR HVAC SYSTEMS WITH FAULT DETECTION CAPABILITIES BASED ON SIMULATION MODELS

    E-Print Network [OSTI]

    operating conditions change. Poor control performance can lead to occupant discomfort in a building, greater it is controlling. Faults that lead to performance deterioration or a change in system behavior are often masked. In addition, the model acts as a reference of correct behavior, which facilitates the detection of faults

  20. Active Fault Controls At High-Temperature Geothermal Sites- Prospectin...

    Open Energy Info (EERE)

    the level of unrecognized active faults present in these areas. Analysis of low-sun-angle aerial photography acquired over the Needle Rocks, Astor Pass, Empire, and Lee...

  1. Fire Alarm Control Panel is located in Switchgear

    E-Print Network [OSTI]

    KEY: NORTH CHDD-South Floor 1 Fire Alarm Control Panel is located in Switchgear Room #CD11A Panel is located in Switchgear Room #CD11A on Basement Level Evacuation Route Exit Restroom Fire

  2. Aalborg Universitet State of the art analysis of online fault location on AC cables in underground

    E-Print Network [OSTI]

    Bak, Claus Leth

    systems C. F. Jensen, U.S. Gudmundsdottir, C.L. Bak Energinet.dk, Energinet.dk, Department of Energy Technology Aalborg University Abstract In this article the state of the art research for online fault based on traveling wave methods and methods based on artifi- cial intelligence networks are presented

  3. DFIG Driven Wind Turbine Grid Fault-Tolerance Using High-Order Sliding Mode Control

    E-Print Network [OSTI]

    Boyer, Edmond

    DFIG Driven Wind Turbine Grid Fault-Tolerance Using High-Order Sliding Mode Control Mohamed fault-tolerance of a doubly-fed induction generator- based wind turbine using high-order sliding mode mechanical stress on the drive train). Simulations using the NREL FAST code on a 1.5-MW wind turbine

  4. A self-reconfigurable and fault-tolerant induction motor control architecture

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    conditioning/heat pumps, engine cooling fans, and electric vehicles. This is especially important in high industrial systems the unit cost is a paramount issue. Hence cheap fault-tolerant control has become an important industrial research area. The objective is to give solutions that provide fault

  5. Methods for locating ground faults and insulation degradation condition in energy conversion systems

    DOE Patents [OSTI]

    Agamy, Mohamed; Elasser, Ahmed; Galbraith, Anthony William; Harfman Todorovic, Maja

    2015-08-11

    Methods for determining a ground fault or insulation degradation condition within energy conversion systems are described. A method for determining a ground fault within an energy conversion system may include, in part, a comparison of baseline waveform of differential current to a waveform of differential current during operation for a plurality of DC current carrying conductors in an energy conversion system. A method for determining insulation degradation within an energy conversion system may include, in part, a comparison of baseline frequency spectra of differential current to a frequency spectra of differential current transient at start-up for a plurality of DC current carrying conductors in an energy conversion system. In one embodiment, the energy conversion system may be a photovoltaic system.

  6. IMPLEMENTION AND TESTING OF A FAULT DETECTION SOFTWARE TOOL FOR IMPROVING CONTROL SYSTEM

    E-Print Network [OSTI]

    Diamond, Richard

    INTRODUCTION Heating, ventilating, and air-conditioning (HVAC) systems are typically controlled usingIMPLEMENTION AND TESTING OF A FAULT DETECTION SOFTWARE TOOL FOR IMPROVING CONTROL SYSTEM-based, feedforward control scheme that can improve control performance over traditional PID feedback control and also

  7. Implementation and Testing of a Fault Detection Software Tool for Improving Control System Performance in a Large Commercial Building

    E-Print Network [OSTI]

    Implementation and Testing of a Fault Detection Software Tool for Improving Control System of faults by monitoring the level of these discrepancies. We present results from the first phase of tests

  8. Controlled-source electromagnetic mapping of a faulted sandstone aquifer in central Texas 

    E-Print Network [OSTI]

    Gorman, Erin Margaret

    1998-01-01

    Controlled-source electromagnetic mapping (CSEM) techniques were used to identify lateral variations in electrical conductivity associated with faults and facies contacts in a shallow sandstone aquifer in central Texas. The purpose of the research...

  9. Factors controlling permeability of cataclastic deformation bands and faults in porous sandstone reservoirs

    E-Print Network [OSTI]

    Fossen, Haakon

    Factors controlling permeability of cataclastic deformation bands and faults in porous sandstone March 2015 Available online 18 April 2015 Keywords: Cataclastic band Permeability Porous sandstone Fluid and their petrophysical properties is essential for realistic characterization of deformed sandstone reservoirs

  10. Robust and fault-tolerant linear parameter-varying control of wind turbines Christoffer Sloth a,,1

    E-Print Network [OSTI]

    Hansen, René Rydhof

    Robust and fault-tolerant linear parameter-varying control of wind turbines Christoffer Sloth a,,1 Keywords: Wind turbine control Linear parameter-varying (LPV) control Fault-tolerant control Robust control a b s t r a c t High performance and reliability are required for wind turbines to be competitive

  11. Treanmission Line Fault Location using Interoperability and Integration of Data and Model 

    E-Print Network [OSTI]

    Dutta, Papiya

    2014-01-10

    location applications efficiently. A third contribution of this dissertation work is development of a unified representation of data and model, which allows seamless information exchange between different power system models and between data and models...

  12. Fault finder

    DOE Patents [OSTI]

    Bunch, Richard H. (1614 NW. 106th St., Vancouver, WA 98665)

    1986-01-01

    A fault finder for locating faults along a high voltage electrical transmission line. Real time monitoring of background noise and improved filtering of input signals is used to identify the occurrence of a fault. A fault is detected at both a master and remote unit spaced along the line. A master clock synchronizes operation of a similar clock at the remote unit. Both units include modulator and demodulator circuits for transmission of clock signals and data. All data is received at the master unit for processing to determine an accurate fault distance calculation.

  13. Method and system for controlling a permanent magnet machine during fault conditions

    DOE Patents [OSTI]

    Krefta, Ronald John; Walters, James E.; Gunawan, Fani S.

    2004-05-25

    Method and system for controlling a permanent magnet machine driven by an inverter is provided. The method allows for monitoring a signal indicative of a fault condition. The method further allows for generating during the fault condition a respective signal configured to maintain a field weakening current even though electrical power from an energy source is absent during said fault condition. The level of the maintained field-weakening current enables the machine to operate in a safe mode so that the inverter is protected from excess voltage.

  14. Scenario-Based Fault-Tolerant Model Predictive Control for Diesel-Electric Marine Power Plant

    E-Print Network [OSTI]

    Johansen, Tor Arne

    Scenario-Based Fault-Tolerant Model Predictive Control for Diesel-Electric Marine Power Plant Email: torstein.bo@itk.ntnu.no, tor.arne.johansen@itk.ntnu.no Abstract--Diesel-electric propulsion generation control, Ma- rine safety, Optimal control. I. INTRODUCTION Diesel electric propulsion is a system

  15. High-Order Sliding Mode Control for DFIG-Based Wind Turbine Fault Ride-Through

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    High-Order Sliding Mode Control for DFIG-Based Wind Turbine Fault Ride-Through Mohamed Benbouzid Turbine (WT) using High-Order Sliding Mode (HOSM) control. Indeed, it has been recently suggested wind turbine are carried-out to evaluate ride-through performance of the proposed HOSM control strategy

  16. FAULT DETECTION IN HVAC SYSTEMS USING MODEL-BASED FEEDFORWARD CONTROL

    E-Print Network [OSTI]

    operating conditions change. Poor control performance can lead to occupant discomfort in the treated the process it is controlling. Faults that lead to performance deterioration, or a change in system behavior. The model used in the feedforward controller acts as a baseline of correct behavior, and facilitates

  17. The bridge-type fault current controller--a new facts controller

    SciTech Connect (OSTI)

    Boenig, Heinrich J.; Mielke, C. H. (Charles H.); Burley, B. L. (Burt L.); Chen, Hong; Waynert, J. A. (Joseph A.); Willis, J. O. (Jeffrey O.)

    2002-01-01

    The operation of a novel current controller, which can also function as a fault current limiter and as a solid-state ac circuit breaker, is presented. The controller, which consists of a thyristor bridge, an inductor, and an optional bias power supply, is installed in series with the voltage source and the load, For load current values smaller than a preset value, the inductor of the current controller presents no impedance to the ac current flow. For values higher than the preset current value, the inductor is switched automatically into the ac circuit and limits the amount of current flow. Theoretical results in the form of circuit simulations and experimental results with a single-phase unit, operating on a 13.7 kV three-phase system with peak short-circuit currents of 3140 Arms, are presented.

  18. Methodology for designing the fuzzy resolver for a radial distribution system fault locator 

    E-Print Network [OSTI]

    Li, Jun

    2006-04-12

    .............................. 20 2.4 Chapter Summary .................................................................................. 28 III PROBLEM FORMULATION ....................................................................... 29 3.1 Introduction... .................................................................. 79 4.7 Structure of the Control Logic Block of Fuses............................................ 80 4.8 Output of the Comparator............................................................................ 81 4.9 Flowchart of the Control Signal...

  19. Position Paper: Automotive CPS Workshop Oct. 2010 Fault-Tolerant Discrete Control Logic in Automotive Applications

    E-Print Network [OSTI]

    Rajkumar, Ragunathan "Raj"

    in Automotive Applications Richard Hill Department of Mechanical Engineering, University of Detroit Mercy StPosition Paper: Automotive CPS Workshop Oct. 2010 Fault-Tolerant Discrete Control Logic systems, occupant safety systems, etc. As the complexity and coupling of these automotive control systems

  20. Fault-Adaptive Control for Robust Performance Management of Computing Systems

    E-Print Network [OSTI]

    Abdelwahed, Sherif

    Fault-Adaptive Control for Robust Performance Management of Computing Systems Sherif Abdelwahed is traced back to current state and the initial step is selected. · Future computing systems will typically, transportation, and command and control systems. To cope with the complexity expected of future computing

  1. Implementation of Resistive Type Superconducting Fault Current Limiters in Electrical Grids: Performance Analysis and Measuring of Optimal Locations

    E-Print Network [OSTI]

    Zhang, Xiuchang; Zhong, Z; Coombs, T A

    2015-01-01

    In the past few years there has been a significant rise in the short-circuit current levels in transmission and distribution networks, it due to the increasing demands on power and the addition of sources of distributed generations. It leads to the need of integration of novel protection systems such as the superconducting fault current limiters (SFCLs), ... . SFCL models on the electric distribution networks largely rely on the insertion of a step or exponential resistance that is determined by a predefined quenching time. However, beyond the framework of these models, the study of the performance, reliability, and location strategy for the installation of sole or multiple SFCLs in power grids still lacks of proper development leading to the utter need of comprehensive and systematic studies on this issue. In this paper, we expand the scope of the aforementioned models by considering the actual behaviour of a SFCL in terms of the temperature dynamic power-law dependence between the electrical field and the c...

  2. Fault tolerant control of homopolar magnetic bearings and circular sensor arrays 

    E-Print Network [OSTI]

    Li, Ming-Hsiu

    2006-04-12

    reduction, and voltage/displacement gains to be unaffected by the failure. The other control scheme is to adjust the feedback gains on-line or off-line, but the current distribution matrices are invariant before and after the faults. Simulation results have...

  3. GRC Transactions, Vol. 32, 2008 Blue Mountain, Nevada, structural control, normal fault,

    E-Print Network [OSTI]

    Faulds, James E.

    GRC Transactions, Vol. 32, 2008 273 Keywords Blue Mountain, Nevada, structural control, normal fault, oblique slip, dilatant zone, Great Basin AbstrAct The Blue Mountain geothermal field is a blind geothermal prospect (i.e., no surface hot springs) along the west flank of Blue Mountain in southern Humboldt

  4. Byzantine Fault Tolerance for Electric Power Grid Monitoring and Control Wenbing Zhao and F. Eugenio Villaseca

    E-Print Network [OSTI]

    Zhao, Wenbing

    Byzantine Fault Tolerance for Electric Power Grid Monitoring and Control Wenbing Zhao and F of the electric power grid is crucial to ev- ery nation's security and well-being. As revealed by a num- ber of large-scale blackout incidents in North America, the data communication infrastructure for power grid

  5. Anywhere But Here: An Introduction to State Control of Hazardous Waste Facility Location

    E-Print Network [OSTI]

    Tarlock, Dan A.

    1981-01-01

    State Control Of Hazardous- Waste Facility Location A. Danautonomy over the location of hazardous-waste managementa hazardous-waste facility-siting process is the location of

  6. Optimal fault location 

    E-Print Network [OSTI]

    Knezev, Maja

    2009-05-15

    Basic goal of power system is to continuously provide electrical energy to the users. Like with any other system, failures in power system can occur. In those situations it is critical that correct remedial actions are applied as soon as possible...

  7. Final Project Report: Self-Correcting Controls for VAV System Faults Filter/Fan/Coil and VAV Box Sections

    SciTech Connect (OSTI)

    Brambley, Michael R.; Fernandez, Nicholas; Wang, Weimin; Cort, Katherine A.; Cho, Heejin; Ngo, Hung; Goddard, James K.

    2011-05-01

    This report addresses original research by the Pacific Northwest National Laboratory for the California Institute for Energy and Environment on self-correcting controls for variable-air-volume (VAV) heating, ventilating and air-conditioning systems and focuses specifically on air handling and VAV box components of the air side of the system. A complete set of faults for these components was compiled and a fault mode analysis performed to understand the detectable symptoms of the faults and the chain of causation. A set of 26 algorithms was developed to facilitate the automatic correction of these faults in typical commercial VAV systems. These algorithms include training tests that are used during commissioning to develop models of normal system operation, passive diagnostics used to detect the symptoms of faults, proactive diagnostics used to diagnose the cause of a fault, and finally fault correction algorithms. Ten of the twenty six algorithms were implemented in a prototype software package that interfaces with a test bed facility at PNNL's Richland, WA, laboratory. Measurement bias faults were instigated in the supply-air temperature sensor and the supply-air flow meter to test the algorithms developed. The algorithms as implemented in the laboratory software correctly detected, diagnosed and corrected these faults. Finally, an economic and impact assessment was performed for the State of California for deployment of self-correcting controls. Assuming 15% HVAC energy savings and a modeled deployment profile, 3.1-5.8 TBu of energy savings are possible by year 15.

  8. Implementation and testing of a fault detection software tool for improving control system performance in a large commercial building

    E-Print Network [OSTI]

    Salsbury, T.I.

    2011-01-01

    a stand-alone software program for testing with the testImplementation and Testing of a Fault Detection Softwareopens the way for testing the control software on any other

  9. Aalborg Universitet Negative Sequence Controllers to Reduce Power Oscillations During Electric Faults in

    E-Print Network [OSTI]

    Chaudhary, Sanjay

    -HVDC transmission connecting an offshore wind power plant to an onshore grid. To develop a PSCAD/EMTDC simulation Faults in the Offshore Wind Power Grid Chaudhary, Sanjay Kumar Publication date: 2010 Document Version During Electric Faults in the Offshore Wind Power Grid. Poster session presented at IEEE PES General

  10. Fault tolerant control allocation in systems with fixed magnitude discrete controls 

    E-Print Network [OSTI]

    Marwaha, Monika

    2009-05-15

    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 VITA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 ix LIST OF TABLES TABLE Page I Reaction Control System Jets . . . . . . . . . . . . . . . . . . . . . . 32 II Ellipsled Mass and Inertia Properties... Charactersitics of Mars Ellipsled . . . . . . . . . . . . . . . 31 6 Ellipsled Free Body Diagram . . . . . . . . . . . . . . . . . . . . . . 33 7 Command Input Reference Trajectory . . . . . . . . . . . . . . . . . 35 8 Example Time History of RCS Jets...

  11. Extensive, uplift-related and non-fault-controlled spar precipitation in the Permian Capitan Formation

    E-Print Network [OSTI]

    Loyd, SJ; Dickson, JAD; Scholle, PA; Tripati, AK

    2013-01-01

    1993. Geochemistry of post-uplift calcite in the PermianM. , Darke, G. , 1990. Uplift Diagenesis—Comparative Calcitelocate/sedgeo Extensive, uplift-related and non-fault-

  12. ME/SE 762 Nonlinear Systems and Control Location: SOC B63

    E-Print Network [OSTI]

    Lin, Xi

    ME/SE 762 Nonlinear Systems and Control Location: SOC B63 Time: Tue & Thu 12-2 Instructor: Calin-4 #12;ME/SE 762 Nonlinear Systems and Control Prerequisites: a grad-level class on linear systems: · stability analysis of nonlinear systems (with emphasis on Lyapunov theory) · nonlinear feedback control

  13. Use of Supervisory Control and Data Acquisition for Damage Location of Water Delivery Systems

    E-Print Network [OSTI]

    Shinozuka, Masanobu

    Use of Supervisory Control and Data Acquisition for Damage Location of Water Delivery Systems Masanobu Shinozuka1 ; Jianwen Liang2 ; and Maria Q. Feng3 Abstract: Urban water delivery systems can, this paper develops a methodology to detect and locate the damage in a water delivery system by monitoring

  14. Fault location in optical networks

    SciTech Connect (OSTI)

    Stevens, Rick C.; Kryzak, Charles J.; Keeler, Gordon A.; Serkland, Darwin K.; Geib, Kent M.; Kornrumpf, William P.

    2008-07-01

    One apparatus embodiment includes an optical emitter and a photodetector. At least a portion of the optical emitter extends a radial distance from a center point. The photodetector provided around at least a portion of the optical emitter and positioned outside the radial distance of the portion of the optical emitter.

  15. Fault Diagnosis with Multi-State Alarms in a Nuclear Power Control Simulation

    SciTech Connect (OSTI)

    Stuart A. Ragsdale; Roger Lew; Ronald L. Boring

    2014-09-01

    This research addresses how alarm systems can increase operator performance within nuclear power plant operations. The experiment examined the effects of two types of alarm systems (two-state and three-state alarms) on alarm compliance and diagnosis for two types of faults differing in complexity. We hypothesized the use of three-state alarms would improve performance in alarm recognition and fault diagnoses over that of two-state alarms. Sensitivity and criterion based on the Signal Detection Theory were used to measure performance. We further hypothesized that operator trust would be highest when using three-state alarms. The findings from this research showed participants performed better and had more trust in three-state alarms compared to two-state alarms. Furthermore, these findings have significant theoretical implications and practical applications as they apply to improving the efficiency and effectiveness of nuclear power plant operations.

  16. FAULT DIAGNOSIS WITH MULTI-STATE ALARMS IN A NUCLEAR POWER CONTROL SIMULATOR

    SciTech Connect (OSTI)

    Austin Ragsdale; Roger Lew; Brian P. Dyre; Ronald L. Boring

    2012-10-01

    This research addresses how alarm systems can increase operator performance within nuclear power plant operations. The experiment examined the effect of two types of alarm systems (two-state and three-state alarms) on alarm compliance and diagnosis for two types of faults differing in complexity. We hypothesized three-state alarms would improve performance in alarm recognition and fault diagnoses over that of two-state alarms. We used sensitivity and criterion based on Signal Detection Theory to measure performance. We further hypothesized that operator trust would be highest when using three-state alarms. The findings from this research showed participants performed better and had more trust in three-state alarms compared to two-state alarms. Furthermore, these findings have significant theoretical implications and practical applications as they apply to improving the efficiency and effectiveness of nuclear power plant operations.

  17. Development of Hydrologic Characterization Technology of Fault Zones

    SciTech Connect (OSTI)

    Karasaki, Kenzi; Onishi, Tiemi; Wu, Yu-Shu

    2008-03-31

    Through an extensive literature survey we find that there is very limited amount of work on fault zone hydrology, particularly in the field using borehole testing. The common elements of a fault include a core, and damage zones. The core usually acts as a barrier to the flow across it, whereas the damage zone controls the flow either parallel to the strike or dip of a fault. In most of cases the damage zone isthe one that is controlling the flow in the fault zone and the surroundings. The permeability of damage zone is in the range of two to three orders of magnitude higher than the protolith. The fault core can have permeability up to seven orders of magnitude lower than the damage zone. The fault types (normal, reverse, and strike-slip) by themselves do not appear to be a clear classifier of the hydrology of fault zones. However, there still remains a possibility that other additional geologic attributes and scaling relationships can be used to predict or bracket the range of hydrologic behavior of fault zones. AMT (Audio frequency Magneto Telluric) and seismic reflection techniques are often used to locate faults. Geochemical signatures and temperature distributions are often used to identify flow domains and/or directions. ALSM (Airborne Laser Swath Mapping) or LIDAR (Light Detection and Ranging) method may prove to be a powerful tool for identifying lineaments in place of the traditional photogrammetry. Nonetheless not much work has been done to characterize the hydrologic properties of faults by directly testing them using pump tests. There are some uncertainties involved in analyzing pressure transients of pump tests: both low permeability and high permeability faults exhibit similar pressure responses. A physically based conceptual and numerical model is presented for simulating fluid and heat flow and solute transport through fractured fault zones using a multiple-continuum medium approach. Data from the Horonobe URL site are analyzed to demonstrate the proposed approach and to examine the flow direction and magnitude on both sides of a suspected fault. We describe a strategy for effective characterization of fault zone hydrology. We recommend conducting a long term pump test followed by a long term buildup test. We do not recommend isolating the borehole into too many intervals. We do recommend ensuring durability and redundancy for long term monitoring.

  18. FAULT DETECTION IN HVAC SYSTEMS USING MODEL-BASED FEEDFORWARD CONTROL

    E-Print Network [OSTI]

    Diamond, Richard

    the controller with a simulated dual-duct air-handling unit. We also discuss recent experiences of implementing, Comfort/Energy, Control/Simulation/Field Tests, Air-Conditioning Systems, Feedforward Control, Diagnostics 1 INTRODUCTION Heating, ventilating, and air-conditioning (HVAC) systems are typically controlled

  19. Earthquake Nucleation on Geometrically Complex Faults

    E-Print Network [OSTI]

    Fang, Zijun

    2009-01-01

    fault slip and earthquake prediction, J. Geophys. Res. , [implications for an earthquake prediction field monitoringpredictions of hypocenter location and occurrence time of earthquakes,

  20. Fault-tolerant model predictive control of a wind turbine benchmark

    E-Print Network [OSTI]

    Cambridge, University of

    subscript r reference value or rotor variable subscript m measurement 1. INTRODUCTION Wind energy has been, desert or mountain regions, where wind energy is abundant but maintenance costs for the wind turbines utilised for a long time as a renewable energy source. But wind farms are usually located at offshore

  1. Data-Based Monitoring and Fault-Tolerant Control of Nonlinear Processes

    E-Print Network [OSTI]

    Chilin, David

    2012-01-01

    optimization-based control systems like MPC are used) to carry out real-time calculations within the limits set by process

  2. Fault-Tolerant Deployment of Embedded Software for Cost-Sensitive Real-Time Feedback-Control Applications

    E-Print Network [OSTI]

    Carloni, Luca

    platform that is often distributed around the plant (as it is typical, for instance, in automotive applica of specifying detailed mechanisms for addressing platform faults, while involving them in the definition algorithms, selecting the best compo- nents for the execution platform, and defining an accurate fault model

  3. Computer hardware fault administration

    DOE Patents [OSTI]

    Archer, Charles J. (Rochester, MN); Megerian, Mark G. (Rochester, MN); Ratterman, Joseph D. (Rochester, MN); Smith, Brian E. (Rochester, MN)

    2010-09-14

    Computer hardware fault administration carried out in a parallel computer, where the parallel computer includes a plurality of compute nodes. The compute nodes are coupled for data communications by at least two independent data communications networks, where each data communications network includes data communications links connected to the compute nodes. Typical embodiments carry out hardware fault administration by identifying a location of a defective link in the first data communications network of the parallel computer and routing communications data around the defective link through the second data communications network of the parallel computer.

  4. Investigating conformance monitoring issues in air traffic control using fault detection approaches

    E-Print Network [OSTI]

    Reynolds, Tom George, 1972-

    2004-01-01

    In order to maintain Air Traffic Control (ATC) system safety, security and efficiency, conformance monitoring must be performed to ensure that aircraft adhere to their assigned clearances. New Decision Support Tools (DSTs), ...

  5. Controls on Fault-Hosted Fluid Flow: Preliminary Results from the Coso

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (Utility Company)| Open(Evans, EtInformation Control of WellGeothermal

  6. Collateral damage: Evolution with displacement of fracture distribution and secondary fault strands in fault damage zones

    E-Print Network [OSTI]

    Savage, Heather M.; Brodsky, Emily E.

    2011-01-01

    E. McCallum (1999), Reservoir damage around faults: OutcropSkar (2005), Controls on damage zone asymmetry of a normal2007), The evolution of the damage zone with fault growth in

  7. Fault tolerant linear actuator

    DOE Patents [OSTI]

    Tesar, Delbert

    2004-09-14

    In varying embodiments, the fault tolerant linear actuator of the present invention is a new and improved linear actuator with fault tolerance and positional control that may incorporate velocity summing, force summing, or a combination of the two. In one embodiment, the invention offers a velocity summing arrangement with a differential gear between two prime movers driving a cage, which then drives a linear spindle screw transmission. Other embodiments feature two prime movers driving separate linear spindle screw transmissions, one internal and one external, in a totally concentric and compact integrated module.

  8. Fault Detection and Load Distribution for the Wind Farm Challenge

    SciTech Connect (OSTI)

    Borchehrsen, Anders B.; Larsen, Jesper A.; Stoustrup, Jakob

    2014-08-24

    In this paper a fault detection system and a fault tolerant controller for a wind farm model. The wind farm model used is the one proposed as a public challenge. In the model three types of faults are introduced to a wind farm consisting of nine turbines. A fault detection system designed, by taking advantage of the fact that within a wind farm several wind turbines will be operating under all most identical conditions. The turbines are then grouped, and then turbines within each group are used to generate residuals for turbines in the group. The generated residuals are then evaluated using dynamical cumulative sum. The designed fault detection system is cable of detecting all three fault types occurring in the model. But there is room for improving the fault detection in some areas. To take advantage of the fault detection system a fault tolerant controller for the wind farm has been designed. The fault tolerant controller is a dispatch controller which is estimating the possible power at each individual turbine and then setting the reference accordingly. The fault tolerant controller has been compared to a reference controller. And the comparison shows that the fault tolerant controller performance better in all measures. The fault detection and a fault tolerant controller has been designed, and based on the simulated results the overall performance of the wind farm is improved on all measures. Thereby this is a step towards improving the overall performance of current and future wind farms.

  9. Please cite this article in press as: Gilfillan, S.M.V., et al., He and Ne as tracers of natural CO2 migration up a fault from a deep reservoir. Int. J. Greenhouse Gas Control (2011), doi:10.1016/j.ijggc.2011.08.008

    E-Print Network [OSTI]

    Wilkinson, Mark

    2011-01-01

    in the deep reservoir, can be traced along a fault plane to occur in waters from both groundwater wells2 migration up a fault from a deep reservoir. Int. J. Greenhouse Gas Control (2011), doi:10.1016/j migration up a fault from a deep reservoir Stuart M.V. Gilfillana, , Mark Wilkinsona , R. Stuart Haszeldinea

  10. Fault Models for Quantum Mechanical Switching Networks

    E-Print Network [OSTI]

    Jacob Biamonte; Jeff S. Allen; Marek A. Perkowski

    2010-01-19

    The difference between faults and errors is that, unlike faults, errors can be corrected using control codes. In classical test and verification one develops a test set separating a correct circuit from a circuit containing any considered fault. Classical faults are modelled at the logical level by fault models that act on classical states. The stuck fault model, thought of as a lead connected to a power rail or to a ground, is most typically considered. A classical test set complete for the stuck fault model propagates both binary basis states, 0 and 1, through all nodes in a network and is known to detect many physical faults. A classical test set complete for the stuck fault model allows all circuit nodes to be completely tested and verifies the function of many gates. It is natural to ask if one may adapt any of the known classical methods to test quantum circuits. Of course, classical fault models do not capture all the logical failures found in quantum circuits. The first obstacle faced when using methods from classical test is developing a set of realistic quantum-logical fault models. Developing fault models to abstract the test problem away from the device level motivated our study. Several results are established. First, we describe typical modes of failure present in the physical design of quantum circuits. From this we develop fault models for quantum binary circuits that enable testing at the logical level. The application of these fault models is shown by adapting the classical test set generation technique known as constructing a fault table to generate quantum test sets. A test set developed using this method is shown to detect each of the considered faults.

  11. Automated Fault Location In Smart Distribution Systems 

    E-Print Network [OSTI]

    Lotfifard, Saeed

    2012-10-19

    of Energy (DOE) “Grid 2030” initiatives for grid modernization by improving reliability indices of the network. Improving customer average interruption duration index (CAIDI) and system average interruption duration index (SAIDI) are direct advantages...

  12. Time and location differentiated NOX control in competitive electricity markets using cap-and-trade mechanisms

    E-Print Network [OSTI]

    Martin, Katherine C.

    2007-01-01

    Due to variations in weather and atmospheric chemistry, the timing and location of nitrogen oxide (NOX) reductions determine their effectiveness in reducing ground-level ozone, which adversely impacts human health. Electric ...

  13. Biological Control 41 (2007) 214222 www.elsevier.com/locate/ybcon

    E-Print Network [OSTI]

    Hanks, Lawrence M.

    2007-01-01

    © 2007 Elsevier Inc. All rights reserved. doi:10.1016/j.biocontrol.2007.01.010 Host defensive response as a biological control agent for management of the borer (Hanks et al., 1996), and has since become establishedVective biological control agent against P. semipunctata, with parasitism rates in the Weld exceeding 90% (Hanks et

  14. Arc fault detection system

    DOE Patents [OSTI]

    Jha, Kamal N. (Bethel Park, PA)

    1999-01-01

    An arc fault detection system for use on ungrounded or high-resistance-grounded power distribution systems is provided which can be retrofitted outside electrical switchboard circuits having limited space constraints. The system includes a differential current relay that senses a current differential between current flowing from secondary windings located in a current transformer coupled to a power supply side of a switchboard, and a total current induced in secondary windings coupled to a load side of the switchboard. When such a current differential is experienced, a current travels through a operating coil of the differential current relay, which in turn opens an upstream circuit breaker located between the switchboard and a power supply to remove the supply of power to the switchboard.

  15. Arc fault detection system

    DOE Patents [OSTI]

    Jha, K.N.

    1999-05-18

    An arc fault detection system for use on ungrounded or high-resistance-grounded power distribution systems is provided which can be retrofitted outside electrical switchboard circuits having limited space constraints. The system includes a differential current relay that senses a current differential between current flowing from secondary windings located in a current transformer coupled to a power supply side of a switchboard, and a total current induced in secondary windings coupled to a load side of the switchboard. When such a current differential is experienced, a current travels through a operating coil of the differential current relay, which in turn opens an upstream circuit breaker located between the switchboard and a power supply to remove the supply of power to the switchboard. 1 fig.

  16. Biological Control 36 (2006) 9199 www.elsevier.com/locate/ybcon

    E-Print Network [OSTI]

    Burns, Jacqueline K.

    2006-01-01

    management tools for R. mendax may negatively impact the importance of D. alloeum as a biocontrol agent 2005 Elsevier Inc. All rights reserved. doi:10.1016/j.biocontrol.2005.07.016 Control strategies

  17. Piping inspection instrument carriage with precise and repeatable position control and location determination

    DOE Patents [OSTI]

    Hapstack, M.; Talarek, T.R.; Zollinger, W.T.; Heckendorn, F.M. II; Park, L.R.

    1994-02-15

    An instrument carriage for inspection of piping comprises front and rear leg assemblies for engaging the interior of the piping and supporting and centering the carriage therein, and an instrumentation arm carried by a shaft system running from the front to rear leg assemblies. The shaft system has a screw shaft for moving the arm axially and a spline gear for moving the arm azimuthally. The arm has a pair of air cylinders that raise and lower a plate in the radial direction. On the plate are probes including an eddy current probe and an ultrasonic testing probe. The ultrasonic testing probe is capable of spinning 360[degree] about its axis. The instrument carriage uses servo motors and pressurized air cylinders for precise actuation of instrument components and precise, repeatable actuation of position control mechanisms. 8 figures.

  18. Piping inspection instrument carriage with precise and repeatable position control and location determination

    DOE Patents [OSTI]

    Hapstack, Mark (North Augusta, SC); Talarek, Ted R. (Augusta, GA); Zollinger, W. Thor (Martinez, GA); Heckendorn, II, Frank M. (Alken, SC); Park, Larry R. (North Augusta, SC)

    1994-01-01

    An instrument carriage for inspection of piping comprises front and rear leg assemblies for engaging the interior of the piping and supporting and centering the carriage therein, and an instrumentation arm carried by a shaft system running from the front to rear leg assemblies. The shaft system has a screw shaft for moving the arm axially and a spline gear for moving the arm azimuthally. The arm has a pair of air cylinders that raise and lower a plate in the radial direction. On the plate are probes including an eddy current probe and an ultrasonic testing probe. The ultrasonic testing probe is capable of spinning 360.degree. about its axis. The instrument carriage uses servo motors and pressurized air cylinders for precise actuation of instrument components and precise, repeatable actuation of position control mechanisms.

  19. Implementation and testing of a fault detection software tool for improving control system performance in a large commercial building

    E-Print Network [OSTI]

    Salsbury, T.I.

    2011-01-01

    of the chillers • Valve leakage in the heating coil •due to a large leakage through the valve. The second alarme.g. , leakage through a control valve. A prolonged setpoint

  20. IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, VOL. 53, NO. 6, NOVEMBER 2004 1847 A Fault-Tolerant Control Architecture for Induction

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . This is the clear case of home and civil appliances, such as, for example, air conditioning/heat pumps, engine vehicle (EV) or hybrid electric vehicle (HEV). In the proposed control scheme, the developed system takes such as an electrical vehicle (EV) or hybrid electric vehicle (HEV), where even limp-back operation is preferred

  1. Outlier Detection Rules for Fault Detection in Solar Photovoltaic Arrays

    E-Print Network [OSTI]

    Lehman, Brad

    . The models must be modified due to different PV capacity, solar cell technology, or installation locationOutlier Detection Rules for Fault Detection in Solar Photovoltaic Arrays Ye Zhao, Brad Lehman Abstract-- Solar photovoltaic (PV) arrays are unique power sources that may have uncleared fault current

  2. Numerical Simulation of Fault Zone Guided Waves: Accuracy and 3-D Effects

    E-Print Network [OSTI]

    Ben-Zion, Yehuda

    seismic velocity. When sources are located in or close to these low-velocity zones, guided seismic head for seismic fault zone head and trapped waves. Fault zone head waves propagate along material discontinuity Pure and Applied Geophysics #12;traveling inside low velocity fault zone layers with dispersive

  3. Location Student Fac/Staff Disabled Special OLLI Reserved Electric Carpool Park and Pay 30 Minute Loading Maint/Service State Vehicle Motorcycle Control* S / L** P / T / LD*** Location Total Alumni House 1 1 17 D L P 19

    E-Print Network [OSTI]

    de Lijser, Peter

    Loading Maint/Service State Vehicle Motorcycle Control* S / L** P / T / LD*** Location Total Alumni House 1 1 17 D L P 19 A North 1,101 5 D L P 1,101 A South 280 D L P 280 A South Fac/Staff 166 2 8 14 3 D L P 190 Arts Drive 9 D L P 9 Byrnes Circle 12

  4. Fault simulation and test generation for small delay faults 

    E-Print Network [OSTI]

    Qiu, Wangqi

    2007-04-25

    Delay faults are an increasingly important test challenge. Traditional delay fault models are incomplete in that they model only a subset of delay defect behaviors. To solve this problem, a more realistic delay fault model has been developed which...

  5. Fault Controlled | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, AlabamaETEC GmbHFarinello Geothermal Power Station JumpFaroeFaulk County,

  6. Control of a wind park with doubly fed induction generators in support of power system stability in case of grid faults

    E-Print Network [OSTI]

    and the transmission grid in the power system simulation software DIgSILENT Power Factory. The results demonstrate penetration of wind power the power system operators are revising nowa- days the grid codes in several turbines to support directly the power system in case of grid faults. The attention is thus on both

  7. Solar system fault detection

    DOE Patents [OSTI]

    Farrington, R.B.; Pruett, J.C. Jr.

    1984-05-14

    A fault detecting apparatus and method are provided for use with an active solar system. The apparatus provides an indication as to whether one or more predetermined faults have occurred in the solar system. The apparatus includes a plurality of sensors, each sensor being used in determining whether a predetermined condition is present. The outputs of the sensors are combined in a pre-established manner in accordance with the kind of predetermined faults to be detected. Indicators communicate with the outputs generated by combining the sensor outputs to give the user of the solar system and the apparatus an indication as to whether a predetermined fault has occurred. Upon detection and indication of any predetermined fault, the user can take appropriate corrective action so that the overall reliability and efficiency of the active solar system are increased.

  8. Solar system fault detection

    DOE Patents [OSTI]

    Farrington, Robert B. (Wheatridge, CO); Pruett, Jr., James C. (Lakewood, CO)

    1986-01-01

    A fault detecting apparatus and method are provided for use with an active solar system. The apparatus provides an indication as to whether one or more predetermined faults have occurred in the solar system. The apparatus includes a plurality of sensors, each sensor being used in determining whether a predetermined condition is present. The outputs of the sensors are combined in a pre-established manner in accordance with the kind of predetermined faults to be detected. Indicators communicate with the outputs generated by combining the sensor outputs to give the user of the solar system and the apparatus an indication as to whether a predetermined fault has occurred. Upon detection and indication of any predetermined fault, the user can take appropriate corrective action so that the overall reliability and efficiency of the active solar system are increased.

  9. Transient fault modeling and fault injection simulation 

    E-Print Network [OSTI]

    Yuan, Xuejun

    1996-01-01

    An accurate transient fault model is presented in this thesis. A 7-term exponential current upset model is derived from the results of a device-level, 3-dimensional, single-event-upset simulation. A curve-fitting algorithm is used to extract...

  10. The Fabric of Clasts, Veins and Foliations within the Actively Creeping Zones of the San Andreas Fault at SAFOD: Implications for Deformation Processes 

    E-Print Network [OSTI]

    Sills, David Wayne

    2012-02-14

    Recovered core samples from the San Andreas Fault Observatory at Depth (SAFOD), located near Parkfield, CA, offer a unique opportunity to study the products of faulting and to learn about the mechanisms of slip at 3 km depth. Casing deformation...

  11. An engineering approach to systems & control

    E-Print Network [OSTI]

    Langendoen, Koen

    , sensing and control. Global chassis control, fault tolerant drive-by-wire systems and smart energy managem

  12. The detection of high impedance faults using random fault behavior 

    E-Print Network [OSTI]

    Carswell, Patrick Wayne

    1988-01-01

    and cleared by conventional overcurrent devices. Examples of high impedance fault scenarios include broken conductors and grounded conductors as is the case with tree faults. Most high impedance fault situations occur on the power distribution system due... of the most promising proposals are presented and commented upon as to their weaknesses and limitations if implemented on an actual power distribution system. A new algorithm is developed which attempts to detect the presence of a high impedance fault...

  13. High resolution, shallow seismic reflection survey of the Pen Branch fault

    SciTech Connect (OSTI)

    Stieve, A.

    1991-05-15

    The purpose of this project, at the Savannah River River Site (SRS) was to acquire, process, and interpret 28 km (17.4 miles) of high resolution seismic reflection data taken across the trace of the Pen Branch fault and other suspected, intersecting north-south trending faults. The survey was optimized for the upper 300 ft of geologic strata in order to demonstrate the existence of very shallow, flat lying horizons, and to determine the depth of the fault or to sediments deformed by the fault. Field acquisition and processing parameters were selected to define small scale spatial variability and structural features in the vicinity of the Pen Branch fault leading to the definition and the location of the Pen Branch fault, the shallowest extent of the fault, and the quantification of the sense and magnitude of motion. Associated geophysical, borehole, and geologic data were incorporated into the investigation to assist in the determination of optimal parameters and aid in the interpretation.

  14. Arc Fault Signal Detection -Fourier Transformation vs. Wavelet Decomposition Techniques using Synthesized Data

    E-Print Network [OSTI]

    for reliable and safe system operation and is a prerequisite for widespread adoption of PV generation systems Abstract -- Arc faults are a significant reliability and safety concern for photovoltaic (PV) systems is that arc faults in the PV systems do not happen predictably, and depending on the location of the sensors

  15. ECE 586 Fault Detection in Digital Circuits Lecture 19 Design for Testability I

    E-Print Network [OSTI]

    Wang, Jia

    be converted into costs associated with the testing process. Cost of test pattern generation. Cost of fault simulation and generation of fault location information. Cost of test equipment. Cost of testing process;Motivation Test generation is complicated. Test complexity can be converted into costs associated

  16. An Empirical Study on the Fault-Proneness of Clone Migration in Clone Genealogies

    E-Print Network [OSTI]

    Zou, Ying

    An Empirical Study on the Fault-Proneness of Clone Migration in Clone Genealogies Shuai Xie1 genealogy. During the evolution of a clone group, developers may change the location of the code fragments the risk for faults in clone segments, clone groups, and clone genealogies from three long-lived software

  17. INNOVATIVE METHODOLOGY FOR DETECTION OF FRACTURE-CONTROLLED SWEET SPOTS IN THE NORTHERN APPALACHIAN BASIN

    SciTech Connect (OSTI)

    Robert Jacobi; John Fountain

    2001-02-28

    In the structure task, we completed a N-S transect east of Seneca Lake that indicated a N-striking fault near the southeastern shore of Seneca Lake, and also indicated NE and ENE-trending FIDs and faults north of Valois. The orientation and existence of the NE-striking FIDs and faults are thought to be controlled by basement faults, rather than thrust ramps above the Salina salt controlled only by a far-field Alleghanian stress field. Structure contour maps based on well log analyses have been constructed but not interpreted. Soil gas data displayed a number of ethane-charged soil gas ''spikes'' on a N-S transect from Ovid south to near Valois. The soil gas team found a larger number of spikes in the northern half of the survey, suggesting more open fractures (and faults) in the northern half of the survey. Seismic data has been purchased and reprocessed. Several grabens observed in the Trenton reflector are consistent with surface structure, soil gas, and aeromagnetic anomalies. The aeromagnetic survey is completed and the data is processed. Prominent magnetic anomalies suggest that faults in the Precambrian basement are located beneath regions where grabens in the Trenton are located.

  18. submitted to Geophys. J. Int. Imaging quasi vertical geologic faults with earthquake data

    E-Print Network [OSTI]

    Roytburd, Victor

    . Faults are boundaries between geologic structures, such as tectonic plates, and are located in earthquake is of considerable interest. The applications include imaging of salt flanks in hydrocarbon exploration and imaging

  19. Modeling fault-zone guided waves of microearthquakes in a geothermal...

    Open Energy Info (EERE)

    the identification and modeling of such guided waves is an effective tool to locate fracture-induced, low-velocity fault-zone structures in geothermal fields. Authors Lou, M.;...

  20. INNOVATIVE METHODOLOGY FOR DETECTION OF FRACTURE-CONTROLLED SWEET SPOTS IN THE NORTHERN APPALACHIAN BASIN

    SciTech Connect (OSTI)

    Robert Jacobi; John Fountain

    2001-06-30

    In the structure task, the authors completed reducing the data they had collected from a N-S transect on the east side of Seneca Lake. They have calculated the fracture frequency for all the fracture sets at each site, and constructed modified rose diagrams that summarize the fracture attributes at each site. These data indicate a N-striking fault near the southeastern shore of Seneca Lake, and also indicate NE and ENE-trending FIDs and faults north of Valois. The orientation and existence of the ENE-striking FIDs and faults are thought to be guided by faults in the Precambrian basement. These basement faults apparently were sufficiently reactivated to cause faulting in the Paleozoic section. Other faults are thrust ramps above the Silurian salt section that were controlled by a far-field Alleghanian stress field. Structure contour maps and isopach maps have been revised based on additional well log analyses. Except for the Glodes Corners Field, the well spacing generally is insufficient to definitely identify faults. However, relatively sharp elevational changes east of Keuka Lake support the contention that faults occur along the east side of Keuka Lake. Outcrop stratigraphy along the east side of Seneca Lake indicates that faults and gentle folds can be inferred from some exposures along Seneca Lake, but the lensing nature of the individual sandstones can preclude long-distance definite correlations and structure identification. Soil gas data collected during the 2000 field season was reduced and displayed in the previous semiannual report. The seismic data that Quest licensed has been reprocessed. Several grabens observed in the Trenton reflector are consistent with surface structure, soil gas, and aeromagnetic anomalies. In this report they display an interpreted seismic line that crosses the Glodes Corners and Muck Farms fields. The final report from the subcontractor concerning the completed aeromagnetic survey is included. Prominent magnetic anomalies suggest that faults in the Precambrian basement are located beneath regions where grabens in the Trenton are located. The trend and location of these faults based on aeromagnetics agrees with the location based on FIDs. These data indicate that integration of aeromagnetic and topographic lineaments, surface structure, soil gas with seismic and well logs allows them to extrapolate Trenton-Black River trends away from confirmatory seismic lines.

  1. INNOVATIVE METHODOLOGY FOR DETECTION OF FRACTURE-CONTROLLED SWEET SPOTS IN THE NORTHERN APPALACHIAN BASIN

    SciTech Connect (OSTI)

    Robert Jacobi; John Fountain

    2002-01-30

    In the structure task, we completed reducing the data we had collected from a N-S transect on the east of Seneca Lake. We have calculated the fracture frequency for all the fracture sets at each site, and constructed modified rose diagrams that summarize the fracture attributes at each site. These data indicate a N-striking fault near the southeastern shore of Seneca Lake, and also indicate NE and ENE-trending FIDs and faults north of Valois. The orientation and existence of the ENE-striking FIDs and faults are thought to be guided by faults in the Precambrian basement; these basement faults apparently were sufficiently reactivated to cause faulting in the Paleozoic section. Other faults are thrust ramps above the Silurian salt section that were controlled by a far-field Alleghanian stress field. Structure contour maps and isopach maps have been revised based on additional well log analyses. Except for the Glodes Corners Field, the well spacing generally is insufficient to definitively identify faults. However, relatively sharp elevational changes east of Keuka Lake support the contention that faults occur along the east side of Keuka Lake. Outcrop stratigraphy along the east side of Seneca Lake indicates that faults and gentle folds can be inferred from the some exposures along Seneca Lake, but the lensing nature of the individual sandstones can preclude long-distance definitive correlations and structure identification. Soil gas data collected during the 2000 field season was reduced and displayed in the previous semiannual report. The seismic data that Quest licensed has been reprocessed. Several grabens observed in the Trenton reflector are consistent with surface structure, soil gas, and aeromagnetic anomalies. In this report we display an interpreted seismic line that crosses the Glodes Corners and Muck Farm fields. The final report from the subcontractor concerning the completed aeromagnetic survey is included. Prominent magnetic anomalies suggest that faults in the Precambrian basement are located beneath regions where grabens in the Trenton are located. The trend and location of these faults based on aeromagnetics agrees with the location based on FIDs. These data indicate that integration of aeromagnetic and topographic lineaments, surface structure, soil gas with seismic and well logs allows us to extrapolate Trenton-Black River trends away from confirmatory seismic lines.

  2. Influence of plastic deformation on bimaterial fault rupture directivity

    E-Print Network [OSTI]

    Dmowska, Renata

    Influence of plastic deformation on bimaterial fault rupture directivity Nora DeDontney,1 Elizabeth of the role of the stress state on the distribution of plastic deformation and the direction of preferred in determining the location of plastic deformation. For different orientations, plastic deformation can

  3. Fault interaction near Hollister, California

    SciTech Connect (OSTI)

    Mavko, G.M.

    1982-09-10

    A numerical model is used to study fault stress slip near Hollister, California. The geometrically complex system of interacting faults, including the San Andreas, Calaveras, Sargent, and Busch faults, is approximated with a two-dimensional distribution of short planar fault segments in an elastic medium. The steady stress and slip rate are simulated by specifying frictional strength and stepping the remote stress ahead in time. The resulting computed fault stress is roughly proportional to the observed spatial density of small earthquakes, suggesting that the distinction between segments characterized by earthquakes and those with aseismic creep results, in part, from geometry. A nonsteady simulation is made by introducing, in addition, stress drops for individual moderate earthquakes. A close fit of observed creep with calculated slip on the Calaveras and San Andreas faults suggests that many changes in creep rate (averaged over several months) are caused by local moderate earthquakes. In particular, a 3-year creep lag preceding the August 6, 1979, Coyote Lake earthquake on the Calaveras fault seems to have been a direct result of the November 28, 1974, Thanksgiving Day earthquake on the Busch fault. Computed lags in slip rate preceding some other moderate earthquakes in the area are also due to earlier earthquakes. Although the response of the upper 1 km of the fault zone may cause some individual creep events and introduce delays in others, the long-term rate appears to reflect deep slip.

  4. Fault current limiter

    DOE Patents [OSTI]

    Darmann, Francis Anthony

    2013-10-08

    A fault current limiter (FCL) includes a series of high permeability posts for collectively define a core for the FCL. A DC coil, for the purposes of saturating a portion of the high permeability posts, surrounds the complete structure outside of an enclosure in the form of a vessel. The vessel contains a dielectric insulation medium. AC coils, for transporting AC current, are wound on insulating formers and electrically interconnected to each other in a manner such that the senses of the magnetic field produced by each AC coil in the corresponding high permeability core are opposing. There are insulation barriers between phases to improve dielectric withstand properties of the dielectric medium.

  5. Fault Current Limiters

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12, 2015Executive Order14, 20111,FYDepartment of5 NovemberFarms to FuelFault

  6. Colorado Regional Faults

    SciTech Connect (OSTI)

    Hussein, Khalid

    2012-02-01

    Citation Information: Originator: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Originator: Colorado Geological Survey (CGS) Publication Date: 2012 Title: Regional Faults Edition: First Publication Information: Publication Place: Earth Science & Observation Center, Cooperative Institute for Research in Environmental Science, University of Colorado, Boulder Publisher: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Description: This layer contains the regional faults of Colorado Spatial Domain: Extent: Top: 4543192.100000 m Left: 144385.020000 m Right: 754585.020000 m Bottom: 4094592.100000 m Contact Information: Contact Organization: Earth Science &Observation Center (ESOC), CIRES, University of Colorado at Boulder Contact Person: Khalid Hussein Address: CIRES, Ekeley Building Earth Science & Observation Center (ESOC) 216 UCB City: Boulder State: CO Postal Code: 80309-0216 Country: USA Contact Telephone: 303-492-6782 Spatial Reference Information: Coordinate System: Universal Transverse Mercator (UTM) WGS’1984 Zone 13N False Easting: 500000.00000000 False Northing: 0.00000000 Central Meridian: -105.00000000 Scale Factor: 0.99960000 Latitude of Origin: 0.00000000 Linear Unit: Meter Datum: World Geodetic System 1984 (WGS ’984) Prime Meridian: Greenwich Angular Unit: Degree Digital Form: Format Name: Shape file

  7. Observer-based fault detection for nuclear reactors

    E-Print Network [OSTI]

    Li, Qing, 1972-

    2001-01-01

    This is a study of fault detection for nuclear reactor systems. Basic concepts are derived from fundamental theories on system observers. Different types of fault- actuator fault, sensor fault, and system dynamics fault ...

  8. System for detecting and limiting electrical ground faults within electrical devices

    DOE Patents [OSTI]

    Gaubatz, Donald C. (Cupertino, CA)

    1990-01-01

    An electrical ground fault detection and limitation system for employment with a nuclear reactor utilizing a liquid metal coolant. Elongate electromagnetic pumps submerged within the liquid metal coolant and electrical support equipment experiencing an insulation breakdown occasion the development of electrical ground fault current. Without some form of detection and control, these currents may build to damaging power levels to expose the pump drive components to liquid metal coolant such as sodium with resultant undesirable secondary effects. Such electrical ground fault currents are detected and controlled through the employment of an isolated power input to the pumps and with the use of a ground fault control conductor providing a direct return path from the affected components to the power source. By incorporating a resistance arrangement with the ground fault control conductor, the amount of fault current permitted to flow may be regulated to the extent that the reactor may remain in operation until maintenance may be performed, notwithstanding the existence of the fault. Monitors such as synchronous demodulators may be employed to identify and evaluate fault currents for each phase of a polyphase power, and control input to the submerged pump and associated support equipment.

  9. Neogene tectonics of northern Central America prior to offset across the polochic fault

    SciTech Connect (OSTI)

    Burkart, B.; Sanchez-Barreda, L.A.; Deaton, B.C.

    1985-01-01

    The reconstruction which removes 130 km of documented left slip across the Polochic fault of northern Guatemala and southern Chiapas juxtaposes the foundered block of the Gulf of Tehuantepec and extensional terrane of Guatemala, lining up prolongations of the Motagua and Jocotan faults with known structures along the coastal margin of the Chiapas massif and within the Gulf. Coast-parallel faults with sinistral displacement, located along the margins of the Chiapas depression, were also active during the Miocene time interval of south-easterly migration of the Gulf of Tehuantepec block. Extensional terrane is well expressed in Guatemala and Honduras south of the Jocotan boundary fault, beginning where the southeasterly-moving block encounters the abrupt bend in the boundary fault. This complex plate boundary became simpler when the left-lateral, east-west-trending Polochic fault sliced across the isthmus in late Miocene, offsetting Laramide structures and the arcuate Neogene plate boundary faults. During its time of major activity the Polochic served as the principal plate boundary fault, across which the major displacement occurred. Today the western part of the NOAM-CARIB plate boundary is diffuse. From western Guatemala and southern Chiapas, where buckling and locking of the Polochic fault has taken place, displacement is distributed among countless shears which extend in a belt from western Guatemala across the Chiapas massif to the western landframe of the Gulf of Tehuantepec.

  10. A Compiler for Fault-Tolerant High Level Quantum Circuits

    E-Print Network [OSTI]

    Alexandru Paler; Ilia Polian; Kae Nemoto; Simon J. Devitt

    2015-09-07

    Fault-tolerant quantum error correction is an absolute necessity for any quantum architecture destined to tackle interesting, large-scale quantum algorithms. The theoretical formalism of quantum error correction codes, fault-tolerant circuit constructions, gate decompositions and relevant optimisations have been well founded for nearly two decades. However, at this point we still do not have a reliable compiler to adapt a high level circuit description to a fully fault-tolerant, error corrected description. There are many technical hurdles to this, including dynamic circuit constructions that occur due to teleportation protocols necessary to achieve fault-tolerance with commonly used error correction codes. We combine multiple results to develop a package that takes any high level quantum circuit consisting of CNOT, Toffoli, Controlled-$\\sqrt{X}$ and arbitrary single qubit rotations and converts it to a equivalent quantum circuit employing ancillary protocols needed for fault-tolerant error correction. We call this representation the (I)initialisation, (C)NOT, (M)measurement representation (ICM) and consists of an initialisation layer of qubits into one of four distinct states, a massive array of CNOT operations that implement the relevant algorithmic decompositions and fault-tolerant ancillary protocols and a series of time ordered $X$- and $Z$-basis measurements. Our package will output either a standard circuit description or a canonical geometric structure that represents its implementation for topological quantum codes that can be further optimised and implemented on actual quantum hardware.

  11. Development of Hydrologic Characterization Technology of Fault Zones -- Phase I, 2nd Report

    SciTech Connect (OSTI)

    Karasaki, Kenzi; Onishi, Tiemi; Black, Bill; Biraud, Sebastien

    2009-03-31

    This is the year-end report of the 2nd year of the NUMO-LBNL collaborative project: Development of Hydrologic Characterization Technology of Fault Zones under NUMO-DOE/LBNL collaboration agreement, the task description of which can be found in the Appendix 3. Literature survey of published information on the relationship between geologic and hydrologic characteristics of faults was conducted. The survey concluded that it may be possible to classify faults by indicators based on various geometric and geologic attributes that may indirectly relate to the hydrologic property of faults. Analysis of existing information on the Wildcat Fault and its surrounding geology was performed. The Wildcat Fault is thought to be a strike-slip fault with a thrust component that runs along the eastern boundary of the Lawrence Berkeley National Laboratory. It is believed to be part of the Hayward Fault system but is considered inactive. Three trenches were excavated at carefully selected locations mainly based on the information from the past investigative work inside the LBNL property. At least one fault was encountered in all three trenches. Detailed trench mapping was conducted by CRIEPI (Central Research Institute for Electric Power Industries) and LBNL scientists. Some intriguing and puzzling discoveries were made that may contradict with the published work in the past. Predictions are made regarding the hydrologic property of the Wildcat Fault based on the analysis of fault structure. Preliminary conceptual models of the Wildcat Fault were proposed. The Wildcat Fault appears to have multiple splays and some low angled faults may be part of the flower structure. In parallel, surface geophysical investigations were conducted using electrical resistivity survey and seismic reflection profiling along three lines on the north and south of the LBNL site. Because of the steep terrain, it was difficult to find optimum locations for survey lines as it is desirable for them to be as straight as possible. One interpretation suggests that the Wildcat Fault is westerly dipping. This could imply that the Wildcat Fault may merge with the Hayward Fault at depth. However, due to the complex geology of the Berkeley Hills, multiple interpretations of the geophysical surveys are possible. iv An effort to construct a 3D GIS model is under way. The model will be used not so much for visualization of the existing data because only surface data are available thus far, but to conduct investigation of possible abutment relations of the buried formations offset by the fault. A 3D model would be useful to conduct 'what if' scenario testing to aid the selection of borehole drilling locations and configurations. Based on the information available thus far, a preliminary plan for borehole drilling is outlined. The basic strategy is to first drill boreholes on both sides of the fault without penetrating it. Borehole tests will be conducted in these boreholes to estimate the property of the fault. Possibly a slanted borehole will be drilled later to intersect the fault to confirm the findings from the boreholes that do not intersect the fault. Finally, the lessons learned from conducting the trenching and geophysical surveys are listed. It is believed that these lessons will be invaluable information for NUMO when it conducts preliminary investigations at yet-to-be selected candidate sites in Japan.

  12. Oil and Gas CDT Predicting fault permeability at depth: incorporating natural

    E-Print Network [OSTI]

    Henderson, Gideon

    Oil and Gas CDT Predicting fault permeability at depth: incorporating natural permeability controls on fluid flow in oil and gas reservoirs. Fault zones are composed of many deformation elements will receive 20 weeks bespoke, residential training of broad relevance to the oil and gas industry: 10 weeks

  13. Voltage grid support of DFIG wind turbines during grid faults Anca D. Hansen1

    E-Print Network [OSTI]

    Voltage grid support of DFIG wind turbines during grid faults Anca D. Hansen1 , Gabriele Michalke2) wind turbines address primarily the design of DFIG wind turbine control with special focus on power strategy for DFIG wind turbines, which enhances the fault ride-through capability of DFIG wind turbines

  14. Hot Pot Detail - Evidence of Quaternary Faulting

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Lane, Michael

    2013-06-27

    Compilation of published data, field observations and photo interpretation relevant to Quaternary faulting at Hot Pot.

  15. Hot Pot Detail - Evidence of Quaternary Faulting

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Lane, Michael

    Compilation of published data, field observations and photo interpretation relevant to Quaternary faulting at Hot Pot.

  16. The paragenesis chemistry of alteration associated with the P2and fault in metamorphic rocks underlying the Athabasca Basin

    E-Print Network [OSTI]

    The paragenesis chemistry of alteration associated with the P2and fault in metamorphic rocks underlying the Athabasca Basin The paragenesis chemistry of alteration associated with the P2and fault's largest high-grade uranium deposit. This deposit is classified as unconformity-type because it is located

  17. An introduction to Fault-tolerant Quantum Computing

    E-Print Network [OSTI]

    Alexandru Paler; Simon J. Devitt

    2015-08-15

    In this paper we provide a basic introduction of the core ideas and theories surrounding fault-tolerant quantum computation. These concepts underly the theoretical framework of large-scale quantum computation and communications and are the driving force for many recent experimental efforts to construct small to medium sized arrays of controllable quantum bits. We examine the basic principals of redundant quantum encoding, required to protect quantum bits from errors generated from both imprecise control and environmental interactions and then examine the principals of fault-tolerance from largely a classical framework. As quantum fault-tolerance essentially is avoiding the uncontrollable cascade of errors caused by the interaction of quantum-bits, these concepts can be directly mapped to quantum information.

  18. Fault-tolerant TCP mechanisms 

    E-Print Network [OSTI]

    Satapati, Suresh Kumar

    2000-01-01

    While fault-tolerance is supported by a variety of critical services that can be accessed over the Internet, they are not robust in that they are oblivious of the impact of their tolerant mechanisms on the service they ...

  19. Internal structure of the Kern Canyon Fault, California: a deeply exhumed strike-slip fault 

    E-Print Network [OSTI]

    Neal, Leslie Ann

    2002-01-01

    Deformation and mineral alteration adjacent to a 2 km long segment of the Kern Canyon fault near Lake Isabella, California are studied to characterize the internal structure of the fault zone and to understand the development of fault structure...

  20. System and method for motor fault detection using stator current noise cancellation

    DOE Patents [OSTI]

    Zhou, Wei (Los Angeles, CA); Lu, Bin (Kenosha, WI); Nowak, Michael P. (Menomonee Falls, WI); Dimino, Steven A. (Wauwatosa, WI)

    2010-12-07

    A system and method for detecting incipient mechanical motor faults by way of current noise cancellation is disclosed. The system includes a controller configured to detect indicia of incipient mechanical motor faults. The controller further includes a processor programmed to receive a baseline set of current data from an operating motor and define a noise component in the baseline set of current data. The processor is also programmed to acquire at least on additional set of real-time operating current data from the motor during operation, redefine the noise component present in each additional set of real-time operating current data, and remove the noise component from the operating current data in real-time to isolate any fault components present in the operating current data. The processor is then programmed to generate a fault index for the operating current data based on any isolated fault components.

  1. System and method for bearing fault detection using stator current noise cancellation

    DOE Patents [OSTI]

    Zhou, Wei (Los Angeles, CA); Lu, Bin (Kenosha, WI); Habetler, Thomas G. (Snellville, GA); Harley, Ronald G. (Lawrenceville, GA); Theisen, Peter J. (West Bend, WI)

    2010-08-17

    A system and method for detecting incipient mechanical motor faults by way of current noise cancellation is disclosed. The system includes a controller configured to detect indicia of incipient mechanical motor faults. The controller further includes a processor programmed to receive a baseline set of current data from an operating motor and define a noise component in the baseline set of current data. The processor is also programmed to repeatedly receive real-time operating current data from the operating motor and remove the noise component from the operating current data in real-time to isolate any fault components present in the operating current data. The processor is then programmed to generate a fault index for the operating current data based on any isolated fault components.

  2. RIS-M-2326 FAULT TREE AND CAUSE CONSEQUENCE ANALYSIS

    E-Print Network [OSTI]

    and control, nuclear reactor safety systems and aircraft landing systems. For systems of failure in operations. For example a nuclear reactor shutdown system should fail at a rate which Abstract. A theory underlying application of automatic fault tree analysis to computer programs

  3. RIS-M-2311 AUTOMATIC FAULT TREE CONSTRUCTION WITH RIKKE

    E-Print Network [OSTI]

    . INIS descriptors. CONTROL EQUIPMENT; ELECTRICAL EQUIPMENT; FAULT TREE ANALYSIS; INDUSTRIAL PLANTS, a heat exchanger can be regarded as two pipes, with a heat exchange between them. In later volumes, more pumps, and valve closure. 5) It is not generally possible to determine the effect of

  4. Advanced fault diagnosis techniques and their role in preventing cascading blackouts 

    E-Print Network [OSTI]

    Zhang, Nan

    2007-04-25

    /or transmission facilities may also happen before the blackouts. ? Contingency conditions: Before the blackouts, the system may be additionally weakened by unscheduled outages, such as several transmission line, transformer and generator outages due to the faults... outages is proposed. The scheme tries to precisely locate the faulted area and avoid unnecessary trip due to the hidden failure or overload. Adaptive protection schemes are introduced to coordinate the relay operations and settings with the prevailing...

  5. Sandia Energy - PV Arc-Fault and Ground Fault Detection and Mitigation...

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

    Program Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Systems Reliability PV Arc-Fault and Ground Fault Detection and Mitigation Program PV...

  6. Influence of Transcontinental arch on Cretaceous listric-normal faulting, west flank, Denver basin

    SciTech Connect (OSTI)

    Davis, T.L.

    1983-08-01

    Seismic studies along the west flank of the Denver basin near Boulder and Greeley, Colorado illustrate the interrelationship between shallow listric-normal faulting in the Cretaceous and deeper basement-controlled faulting. Deeper fault systems, primarily associated with the Transcontinental arch, control the styles and causative mechanisms of listric-normal faulting that developed in the Cretaceous. Three major stratigraphic levels of listric-normal faulting occur in the Boulder-Greeley area. These tectonic sensitive intervals are present in the following Cretaceous formations: Laramie-Fox Hills-upper Pierre, middle Pierre Hygiene zone, and the Niobrara-Carlile-Greenhorn. Documentation of the listric-normal fault style reveals a Wattenberg high, a horst block or positive feature of the greater Transcontinental arch, was active in the east Boulder-Greeley area during Cretaceous time. Paleotectonic events associated with the Wattenberg high are traced through analysis of the listric-normal fault systems that occur in the area. These styles are important to recognize because of their stratigraphic and structural influence on Cretaceous petroleum reservoir systems in the Denver basin. Similar styles of listric-normal faulting occur in the Cretaceous in many Rocky Mountain foreland basins.

  7. Sensor Fault Detection and Isolation System 

    E-Print Network [OSTI]

    Yang, Cheng-Ken

    2014-08-01

    The purpose of this research is to develop a Fault Detection and Isolation (FDI) system which is capable to diagnosis multiple sensor faults in nonlinear cases. In order to lead this study closer to real world applications ...

  8. Library Locations Locations other than Main Library

    E-Print Network [OSTI]

    Library Locations Locations other than Main Library Example: Feminist Studies HQ1410 .U54 2009 ............................................................2 Central Call Number Main Library Location Main Library Example: Main Library HQ1410 .U54 2009 See Center (ATC) Classroom 1575 Building Operations Main Entrance Map and Imagery Laboratory (MIL

  9. Library Locations Locations other than Main Library

    E-Print Network [OSTI]

    Library Locations Locations other than Main Library Example: Feminist Studies HQ1410 .U54 2009 these from the library catalog: www.library.ucsb.edu/depts/access/howinprocess.html Main: Items located in the Main Library, Davidson Main Serials Reading Area: 2 North Map & Imagery Lab: 1 North Media Collection

  10. Boullier The fault zone geology 1 Fault zone geology: lessons from drilling through the Nojima and 1

    E-Print Network [OSTI]

    Boyer, Edmond

    Boullier The fault zone geology 1 Fault zone geology: lessons from active faults with the aim of 11 learning about the geology of the fault all 18 their objectives, have still contributed to a better geological

  11. Award ER25750: Coordinated Infrastructure for Fault Tolerance Systems Indiana University Final Report

    SciTech Connect (OSTI)

    Lumsdaine, Andrew

    2013-03-08

    The main purpose of the Coordinated Infrastructure for Fault Tolerance in Systems initiative has been to conduct research with a goal of providing end-to-end fault tolerance on a systemwide basis for applications and other system software. While fault tolerance has been an integral part of most high-performance computing (HPC) system software developed over the past decade, it has been treated mostly as a collection of isolated stovepipes. Visibility and response to faults has typically been limited to the particular hardware and software subsystems in which they are initially observed. Little fault information is shared across subsystems, allowing little flexibility or control on a system-wide basis, making it practically impossible to provide cohesive end-to-end fault tolerance in support of scientific applications. As an example, consider faults such as communication link failures that can be seen by a network library but are not directly visible to the job scheduler, or consider faults related to node failures that can be detected by system monitoring software but are not inherently visible to the resource manager. If information about such faults could be shared by the network libraries or monitoring software, then other system software, such as a resource manager or job scheduler, could ensure that failed nodes or failed network links were excluded from further job allocations and that further diagnosis could be performed. As a founding member and one of the lead developers of the Open MPI project, our efforts over the course of this project have been focused on making Open MPI more robust to failures by supporting various fault tolerance techniques, and using fault information exchange and coordination between MPI and the HPC system software stack?from the application, numeric libraries, and programming language runtime to other common system components such as jobs schedulers, resource managers, and monitoring tools.

  12. 906 IEEE TRANSACTIONS ON COMPUTER-AIDED DESIGN OF INTEGRATED CIRCUITS AND SYSTEMS, VOL. 27, NO. 5, MAY 2008 Fault-Tolerant Distributed Deployment of

    E-Print Network [OSTI]

    Carloni, Luca

    platform, i.e., the controller. Control theorists design the control laws to be robust with respect of the target platform and the fault model, designers can rely on the synthesis of the low-level fault studies from the automotive industry: a steer-by-wire system from General Motors and a drive

  13. High temperature superconducting fault current limiter

    DOE Patents [OSTI]

    Hull, J.R.

    1997-02-04

    A fault current limiter for an electrical circuit is disclosed. The fault current limiter includes a high temperature superconductor in the electrical circuit. The high temperature superconductor is cooled below its critical temperature to maintain the superconducting electrical properties during operation as the fault current limiter. 15 figs.

  14. High temperature superconducting fault current limiter

    DOE Patents [OSTI]

    Hull, John R. (Hinsdale, IL)

    1997-01-01

    A fault current limiter (10) for an electrical circuit (14). The fault current limiter (10) includes a high temperature superconductor (12) in the electrical circuit (14). The high temperature superconductor (12) is cooled below its critical temperature to maintain the superconducting electrical properties during operation as the fault current limiter (10).

  15. Effect of faulting on ground-water movement in the Death Valley region, Nevada and California

    SciTech Connect (OSTI)

    Faunt, C.C.

    1997-12-31

    This study characterizes the hydrogeologic system of the Death Valley region, an area covering approximately 100,000 square kilometers. The study also characterizes the effects of faults on ground-water movement in the Death Valley region by synthesizing crustal stress, fracture mechanics,a nd structural geologic data. The geologic conditions are typical of the Basin and Range Province; a variety of sedimentary and igneous intrusive and extrusive rocks have been subjected to both compressional and extensional deformation. Faulting and associated fracturing is pervasive and greatly affects ground-water flow patterns. Faults may become preferred conduits or barriers to flow depending on whether they are in relative tension, compression, or shear and other factors such as the degree of dislocations of geologic units caused by faulting, the rock types involved, the fault zone materials, and the depth below the surface. The current crustal stress field was combined with fault orientations to predict potential effects of faults on the regional ground-water flow regime. Numerous examples of fault-controlled ground-water flow exist within the study area. Hydrologic data provided an independent method for checking some of the assumptions concerning preferential flow paths. 97 refs., 20 figs., 5 tabs.

  16. Locative Inversion In Cantonese

    E-Print Network [OSTI]

    Mok, Sui-Sang

    1992-01-01

    This paper proposes that locative inversion is a widespread syntactic process in Cantonese. The sentence-initial locative phrases in the Locative Inversion sentences are argued to be subjects which come from the postverbal complement position...

  17. Fault detection and isolation in aircraft gas turbine engines. Part 2: validation on a simulation test bed

    E-Print Network [OSTI]

    Ray, Asok

    319 Fault detection and isolation in aircraft gas turbine engines. Part 2: validation of fault detection and isolation (FDI) in aircraft gas turbine engines. The FDI algorithms are built upon,onasimulationtestbed.Thetestbedisbuiltuponanintegratedmodelofageneric two-spool turbofan aircraft gas turbine engine including the engine control system. Keywords: aircraft

  18. Early Cretaceous suturing of the Alisitos volcanic arc to North America and the role of the Ancestral Agua Blanca Fault in the Western Peninsular Ranges of Baja

    E-Print Network [OSTI]

    Wetmore, Paul H.

    of the Ancestral Agua Blanca Fault in the Western Peninsular Ranges of Baja California, Mexico Helge Alsleben1 California. A dramatic break in the geology between these two arcs occurs across the ancestral Agua Blanca oblique shear zone, located ~2 km south of the active Agua Blanca fault. The aABF lies within a coeval

  19. Accommodation Location(s) Cologne -Ehrenfeld.

    E-Print Network [OSTI]

    Molinari, Marc

    Accommodation Location(s) ­ Cologne - Ehrenfeld. Price of rent ­ Sub-let, cost roughly 300 euros a month inc bills. Organisation of accommodation/gas/electricity/internet/phones ­ Because I lived with Telekom for phone/internet as they just try to rip you off! Germany COLOGNE Language Assistantship Travel

  20. Fault-tolerant dynamic task graph scheduling

    SciTech Connect (OSTI)

    Kurt, Mehmet C.; Krishnamoorthy, Sriram; Agrawal, Kunal; Agrawal, Gagan

    2014-11-16

    In this paper, we present an approach to fault tolerant execution of dynamic task graphs scheduled using work stealing. In particular, we focus on selective and localized recovery of tasks in the presence of soft faults. We elicit from the user the basic task graph structure in terms of successor and predecessor relationships. The work stealing-based algorithm to schedule such a task graph is augmented to enable recovery when the data and meta-data associated with a task get corrupted. We use this redundancy, and the knowledge of the task graph structure, to selectively recover from faults with low space and time overheads. We show that the fault tolerant design retains the essential properties of the underlying work stealing-based task scheduling algorithm, and that the fault tolerant execution is asymptotically optimal when task re-execution is taken into account. Experimental evaluation demonstrates the low cost of recovery under various fault scenarios.

  1. Seismoelectric Imaging of a Shallow Fault System Employing Fault Guided Waves 

    E-Print Network [OSTI]

    Cohrs, Frelynn Joseph Reese

    2012-07-16

    . The seismic data revealed dispersive energy packets, indicative of guided waves, within the fault zone and absent in the surrounding lithologies. The seismoelectric data was able to produce comparable signals in the fault zone showing guided waves....

  2. Realistic fault modeling and quality test generation of combined delay faults 

    E-Print Network [OSTI]

    Thadhlani, Ajaykumar A

    2001-01-01

    With increasing operating speed and shrinking technology, timing defects in integrated circuits are becoming increasingly important. The well established stuck-at-fault model is not sufficient because it is a static fault model and does not account...

  3. Serial ruptures of the San Andreas fault, Carrizo Plain, California, revealed by three-dimensional excavations

    E-Print Network [OSTI]

    Klinger, Yann

    to expose their subsurface stratigraphy. We can correlate the channels across the fault on the basis of their elevations, shapes, stratigraphy, and ages. The three-dimensional excavations allow us to locate accurately models. [3] Our limited understanding of earthquake recurrence also influences the practice of seismic

  4. Mantle fluids in the Karakoram fault: Helium isotope evidence Simon L. Klemperer a,n

    E-Print Network [OSTI]

    fault Tibet Himalaya helium isotopes geothermal activity India­Asia collision a b s t r a c. Here we show 3 He/4 He ratios in geothermal springs along a 500-km segment of the KKF are 3­ 100 times of the ``mantle suture'' which we therefore locate vertically beneath the KKF, very close to the surface trace

  5. Unsaturated flow and transport through a fault embedded in fractured welded tuff

    E-Print Network [OSTI]

    Hu, Qinhong "Max"

    in locations where there is environmental contamination or the poten- tial for disposal of radioactive waste [Native et al., 1995], and the proposed radioactive waste repository in the tuff forma- tions at YuccaUnsaturated flow and transport through a fault embedded in fractured welded tuff Rohit Salve, Hui

  6. MOBILE DEVICE LOCATION INFORMATION ACQUISITION FRAMEWORK FOR DEVELOPMENT OF LOCATION

    E-Print Network [OSTI]

    Dustdar, Schahram

    MOBILE DEVICE LOCATION INFORMATION ACQUISITION FRAMEWORK FOR DEVELOPMENT OF LOCATION INFORMATION, 1040 Vienna, Austria dustdar@infosys.tuwien.ac.at Keywords: Mobile device location information, location information based services, location information acquisition. Abstract: Mobile device location

  7. Earthquake Nucleation on Geometrically Complex Faults

    E-Print Network [OSTI]

    Fang, Zijun

    2009-01-01

    Preseismic fault slip and earthquake prediction, J. Geophys.Day, The 1999 Izmit, Turkey, earthquake: A 3D dynamic stresstransfer model of intra-earthquake triggering, Bull.

  8. Crossing Active Faults on the Sakhalin II Onshore Pipeline Route: Analysis Methodology and Basic Design

    SciTech Connect (OSTI)

    Vitali, Luigino; Mattiozzi, Pierpaolo

    2008-07-08

    Twin oil (20 and 24 inch) and gas (20 and 48 inch) pipeline systems stretching 800 km are being constructed to connect offshore hydrocarbon deposits from the Sakhalin II concession in the North to an LNG plant and oil export terminal in the South of Sakhalin island. The onshore pipeline route follows a regional fault zone and crosses individual active faults at 19 locations. Sakhalin Energy, Design and Construction companies took significant care to ensure the integrity of the pipelines, should large seismic induced ground movements occur during the Operational life of the facilities. Complex investigations including the identification of the active faults, their precise location, their particular displacement values and assessment of the fault kinematics were carried out to provide input data for unique design solutions. Lateral and reverse offset displacements of 5.5 and 4.5 m respectively were determined as the single-event values for the design level earthquake (DLE)--the 1000-year return period event. Within the constraints of a pipeline route largely fixed, the underground pipeline fault crossing design was developed to define the optimum routing which would minimize stresses and strain using linepipe materials which had been ordered prior to the completion of detailed design, and to specify requirements for pipe trenching shape, materials, drainage system, etc. This Paper describes the steps followed to formulate the concept of the special trenches and the analytical characteristics of the Model.

  9. Crossing Active Faults on the Sakhalin II Onshore Pipeline Route: Pipeline Design and Risk Analysis

    SciTech Connect (OSTI)

    Mattiozzi, Pierpaolo; Strom, Alexander

    2008-07-08

    Twin oil (20 and 24 inch) and gas (20 and 48 inch) pipeline systems stretching 800 km are being constructed to connect offshore hydrocarbon deposits from the Sakhalin II concession in the North to an LNG plant and oil export terminal in the South of Sakhalin island. The onshore pipeline route follows a regional fault zone and crosses individual active faults at 19 locations. Sakhalin Energy, Design and Construction companies took significant care to ensure the integrity of the pipelines, should large seismic induced ground movements occur during the Operational life of the facilities. Complex investigations including the identification of the active faults, their precise location, their particular displacement values and assessment of the fault kinematics were carried out to provide input data for unique design solutions. Lateral and reverse offset displacements of 5.5 and 4.5 m respectively were determined as the single-event values for the design level earthquake (DLE) - the 1000-year return period event. Within the constraints of a pipeline route largely fixed, the underground pipeline fault crossing design was developed to define the optimum routing which would minimize stresses and strain using linepipe materials which had been ordered prior to the completion of detailed design, and to specify requirements for pipe trenching shape, materials, drainage system, etc. Detailed Design was performed with due regard to actual topography and to avoid the possibility of the trenches freezing in winter, the implementation of specific drainage solutions and thermal protection measures.

  10. Accurate resistive bridge fault modeling, simulation, and test generation 

    E-Print Network [OSTI]

    Sar-Dessai, Vijay Ramesh

    1999-01-01

    Resistive bridging faults in CMOS combinational circuits are studied in this work. Bridging faults are modeled using HSPICE circuit simulation of the various types of bridging faults that can occur in CMOS combinational ...

  11. Earthquake behavior and structure of oceanic transform faults

    E-Print Network [OSTI]

    Roland, Emily Carlson

    2012-01-01

    Oceanic transform faults that accommodate strain at mid-ocean ridge offsets represent a unique environment for studying fault mechanics. Here, I use seismic observations and models to explore how fault structure affects ...

  12. Fault Intersection | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, AlabamaETEC GmbHFarinello Geothermal Power Station JumpFaroeFaulk County,Fault

  13. Fault Mapping | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, AlabamaETEC GmbHFarinello Geothermal Power Station JumpFaroeFaulk County,FaultMapping

  14. Fault tree construction of hybrid system requirements using qualitative formal method

    E-Print Network [OSTI]

    specifying requirements for software controlling hybrid systems and conducting safety analysis, engineersFault tree construction of hybrid system requirements using qualitative formal method Jang-Soo Leea , Sung-Deok Chab,* a Instrumentation and Control, Human Factors Division, Korea Atomic Energy Research

  15. Investigation of active faulting at the Emigrant Peak fault in Nevada using shallow seismic reflection and ground penetrating radar

    E-Print Network [OSTI]

    Christie, Michael Wayne

    2007-12-18

    The objective of this study was to assess fault displacement, off-fault deformation, and alluvial fan stratigraphy at the Emigrant Peak fault zone (EPFZ) in Fish Lake Valley, Nevada utilizing shallow seismic reflection (SSR) and ground penetrating...

  16. Evaluation of faulting characteristics and ground acceleration associated with recent movement along the Meers Fault, Southwestern Oklahoma 

    E-Print Network [OSTI]

    Burrell, Richard Dennis

    1997-01-01

    being cited as responsible for the Meers Fault scarp. Earthquakes of magnitude 7 to 8 occurring in conjunction with recent reactivation of the fault have been calculated. However, evidence found within the Wichita Mountains just south of the fault...

  17. PERSPECTIVES Deep Earthquakes: A Fault Too Big?

    E-Print Network [OSTI]

    Stein, Seth

    PERSPECTIVES Deep Earthquakes: A Fault Too Big? Seth Stein Because deep Earth processes are inacces. Recent results for the mys- terious deep earthquakes that occur to depths greater than 600 km is that large deep earthquakes (1-3) seem to have occurred on faults larger than ex- pected from the competing

  18. INDUCTION MOTOR FAULT DIAGNOSTIC AND MONITORING METHODS

    E-Print Network [OSTI]

    Povinelli, Richard J.

    INDUCTION MOTOR FAULT DIAGNOSTIC AND MONITORING METHODS by Aderiano M. da Silva, B.S. A Thesis;i Abstract Induction motors are used worldwide as the "workhorse" in industrial applications material. However, induction motor faults can be detected in an initial stage in order to prevent

  19. Sensor Fault Diagnosis Using Principal Component Analysis 

    E-Print Network [OSTI]

    Sharifi, Mahmoudreza

    2010-07-14

    The purpose of this research is to address the problem of fault diagnosis of sensors which measure a set of direct redundant variables. This study proposes: 1. A method for linear senor fault diagnosis 2. An analysis of isolability and detectability...

  20. Physiochemical Evidence of Faulting Processes and Modeling of Fluid in Evolving Fault Systems in Southern California

    SciTech Connect (OSTI)

    Boles, James [Professor

    2013-05-24

    Our study targets recent (Plio-Pleistocene) faults and young (Tertiary) petroleum fields in southern California. Faults include the Refugio Fault in the Transverse Ranges, the Ellwood Fault in the Santa Barbara Channel, and most recently the Newport- Inglewood in the Los Angeles Basin. Subsurface core and tubing scale samples, outcrop samples, well logs, reservoir properties, pore pressures, fluid compositions, and published structural-seismic sections have been used to characterize the tectonic/diagenetic history of the faults. As part of the effort to understand the diagenetic processes within these fault zones, we have studied analogous processes of rapid carbonate precipitation (scaling) in petroleum reservoir tubing and manmade tunnels. From this, we have identified geochemical signatures in carbonate that characterize rapid CO2 degassing. These data provide constraints for finite element models that predict fluid pressures, multiphase flow patterns, rates and patterns of deformation, subsurface temperatures and heat flow, and geochemistry associated with large fault systems.

  1. Self-triggering superconducting fault current limiter

    DOE Patents [OSTI]

    Yuan, Xing (Albany, NY); Tekletsadik, Kasegn (Rexford, NY)

    2008-10-21

    A modular and scaleable Matrix Fault Current Limiter (MFCL) that functions as a "variable impedance" device in an electric power network, using components made of superconducting and non-superconducting electrically conductive materials. The matrix fault current limiter comprises a fault current limiter module that includes a superconductor which is electrically coupled in parallel with a trigger coil, wherein the trigger coil is magnetically coupled to the superconductor. The current surge doing a fault within the electrical power network will cause the superconductor to transition to its resistive state and also generate a uniform magnetic field in the trigger coil and simultaneously limit the voltage developed across the superconductor. This results in fast and uniform quenching of the superconductors, significantly reduces the burnout risk associated with non-uniformity often existing within the volume of superconductor materials. The fault current limiter modules may be electrically coupled together to form various "n" (rows).times."m" (columns) matrix configurations.

  2. Reversible micromachining locator

    DOE Patents [OSTI]

    Salzer, L.J.; Foreman, L.R.

    1999-08-31

    This invention provides a device which includes a locator, a kinematic mount positioned on a conventional tooling machine, a part carrier disposed on the locator and a retainer ring. The locator has disposed therein a plurality of steel balls, placed in an equidistant position circumferentially around the locator. The kinematic mount includes a plurality of magnets which are in registry with the steel balls on the locator. In operation, a blank part to be machined is placed between a surface of a locator and the retainer ring (fitting within the part carrier). When the locator (with a blank part to be machined) is coupled to the kinematic mount, the part is thus exposed for the desired machining process. Because the locator is removably attachable to the kinematic mount, it can easily be removed from the mount, reversed, and reinserted onto the mount for additional machining. Further, the locator can likewise be removed from the mount and placed onto another tooling machine having a properly aligned kinematic mount. Because of the unique design and use of magnetic forces of the present invention, positioning errors of less than 0.25 micrometer for each machining process can be achieved. 7 figs.

  3. Heterogeneous slip and rupture models of the San Andreas fault zone based upon three-dimensional earthquake tomography

    SciTech Connect (OSTI)

    Foxall, W.

    1992-11-01

    Crystal fault zones exhibit spatially heterogeneous slip behavior at all scales, slip being partitioned between stable frictional sliding, or fault creep, and unstable earthquake rupture. An understanding the mechanisms underlying slip segmentation is fundamental to research into fault dynamics and the physics of earthquake generation. This thesis investigates the influence that large-scale along-strike heterogeneity in fault zone lithology has on slip segmentation. Large-scale transitions from the stable block sliding of the Central 4D Creeping Section of the San Andreas, fault to the locked 1906 and 1857 earthquake segments takes place along the Loma Prieta and Parkfield sections of the fault, respectively, the transitions being accomplished in part by the generation of earthquakes in the magnitude range 6 (Parkfield) to 7 (Loma Prieta). Information on sub-surface lithology interpreted from the Loma Prieta and Parkfield three-dimensional crustal velocity models computed by Michelini (1991) is integrated with information on slip behavior provided by the distributions of earthquakes located using, the three-dimensional models and by surface creep data to study the relationships between large-scale lithological heterogeneity and slip segmentation along these two sections of the fault zone.

  4. Mechanical Models of Fault-Related Folding

    SciTech Connect (OSTI)

    Johnson, A. M.

    2003-01-09

    The subject of the proposed research is fault-related folding and ground deformation. The results are relevant to oil-producing structures throughout the world, to understanding of damage that has been observed along and near earthquake ruptures, and to earthquake-producing structures in California and other tectonically-active areas. The objectives of the proposed research were to provide both a unified, mechanical infrastructure for studies of fault-related foldings and to present the results in computer programs that have graphical users interfaces (GUIs) so that structural geologists and geophysicists can model a wide variety of fault-related folds (FaRFs).

  5. Fault-Tolerant Exact State Transmission

    E-Print Network [OSTI]

    Zhao-Ming Wang; Lian-Ao Wu; Michele Modugno; Wang Yao; Bin Shao

    2012-05-02

    We show that a category of one-dimensional XY-type models may enable high-fidelity quantum state transmissions, regardless of details of coupling configurations. This observation leads to a fault- tolerant design of a state transmission setup. The setup is fault-tolerant, with specified thresholds, against engineering failures of coupling configurations, fabrication imperfections or defects, and even time-dependent noises. We propose the implementation of the fault-tolerant scheme using hard-core bosons in one-dimensional optical lattices.

  6. Cooperative application/OS DRAM fault recovery.

    SciTech Connect (OSTI)

    Ferreira, Kurt Brian; Bridges, Patrick G. (University of New Mexico, Albuquerque, NM); Heroux, Michael Allen; Hoemmen, Mark; Brightwell, Ronald Brian

    2012-05-01

    Exascale systems will present considerable fault-tolerance challenges to applications and system software. These systems are expected to suffer several hard and soft errors per day. Unfortunately, many fault-tolerance methods in use, such as rollback recovery, are unsuitable for many expected errors, for example DRAM failures. As a result, applications will need to address these resilience challenges to more effectively utilize future systems. In this paper, we describe work on a cross-layer application/OS framework to handle uncorrected memory errors. We illustrate the use of this framework through its integration with a new fault-tolerant iterative solver within the Trilinos library, and present initial convergence results.

  7. Fault Detection and Diagnosis in Building HVAC Systems

    E-Print Network [OSTI]

    Najafi, Massieh

    2010-01-01

    of outside air condition, occupant behavior, and buildingair condition and occupant behavior) and fault condition (

  8. Initiation of the San Jacinto Fault and its Interaction with the San Andreas Fault: Insights from Geodynamic Modeling

    E-Print Network [OSTI]

    Liu, Mian

    Initiation of the San Jacinto Fault and its Interaction with the San Andreas Fault: Insights from Geodynamic Modeling QINGSONG LI 1,2 and MIAN LIU 1 Abstract--The San Andreas Fault (SAF) is the Pacific is accommodated by the San Jacinto Fault (SJF). Here we investigate the initiation of the SJF and its interaction

  9. 1. Detect ground faults in PV arrays mounted on the roofs of 2. Interrupt the fault current

    E-Print Network [OSTI]

    Johnson, Eric E.

    1. Detect ground faults in PV arrays mounted on the roofs of dwellings 2. Interrupt the fault current 3. Indicate that a ground fault had occurred 4. Disconnect the faulted part of the PV array 5. "Crowbar" (short-circuit) the PV array The original GFPD prototype was developed in two versions that were

  10. The propagation and linkage of normal faults: Insights from the Strathspey-Brent-Statfjord fault array, northern North Sea

    E-Print Network [OSTI]

    McLeod, Aileen E.

    2001-01-01

    Through examination of the scaling relations of faults and the use of seismic stratigraphic techniques,

  11. Structure of the eastern Red Rocks and Wind Ridge thrust faults, Wyoming: how a thrust fault gains displacement along strike 

    E-Print Network [OSTI]

    Huntsman, Brent Stanley

    1983-01-01

    OF FIELD MAPPING Methods . Thrust Faults . The Wind Ridge Thrust Fault System The Red Rocks Thrust Fault System CLAY MODEL STUDIES Purpose and Description Model Results DISCUSSION OF RESULTS Kinematics of the Red Rocks Thrust Fault Termination... . Kinematics of the Southern Wind Ridge Thrust Fault . . . A Conceptual Model of the Red Rocks Thrust Fault Termination Implications of the Red Rocks Fault Termination . . . . . . Page V1 V11 1X X1 X11 7 9 17 18 18 21 24 27 35 35 38 49 49...

  12. Location linked information

    E-Print Network [OSTI]

    Mankins, Matthew William David, 1975-

    2003-01-01

    This work builds an infrastructure called Location Linked Information that offers a means to associate digital information with public, physical places. This connection creates a hybrid virtual/physical space, called glean ...

  13. Locating Heat Recovery Opportunities 

    E-Print Network [OSTI]

    Waterland, A. F.

    1981-01-01

    Basic concepts of heat recovery are defined as they apply to the industrial community. Methods for locating, ranking, and developing heat recovery opportunities are presented and explained. The needs for useful heat 'sinks' are emphasized as equal...

  14. A connecting network with fault tolerance capabilities

    SciTech Connect (OSTI)

    Ciminiera, L.; Serra, A.

    1986-06-01

    A new multistage interconnection network is presented in this paper. It is able to handle the communications between the connected devices correctly, even in the presence of fault(s) in the network. This goal is achieved by using redundant paths with a fast procedure able to dynamically reroute the message. It is also shown that the rerouting properties are still valid when broadcasting transmission is used.

  15. Buffered coscheduling for parallel programming and enhanced fault tolerance

    DOE Patents [OSTI]

    Petrini, Fabrizio (Los Alamos, NM); Feng, Wu-chun (Los Alamos, NM)

    2006-01-31

    A computer implemented method schedules processor jobs on a network of parallel machine processors or distributed system processors. Control information communications generated by each process performed by each processor during a defined time interval is accumulated in buffers, where adjacent time intervals are separated by strobe intervals for a global exchange of control information. A global exchange of the control information communications at the end of each defined time interval is performed during an intervening strobe interval so that each processor is informed by all of the other processors of the number of incoming jobs to be received by each processor in a subsequent time interval. The buffered coscheduling method of this invention also enhances the fault tolerance of a network of parallel machine processors or distributed system processors

  16. TDA Progress Report 42-132 February 15, 1998 An Intelligent Fault Detection and Isolation

    E-Print Network [OSTI]

    Arabshahi, Payman

    and isolate the most likely causes of system failure in cases of faulty operation. Furthermore equipment from the spacecraft down to mission control, is imperative to any mission success. When a problem objectives, whether the fault has occurred in the ground station, the spacecraft, or elsewhere

  17. Low-Cost Embedded Fault Detection for Safety-Critical Systems

    E-Print Network [OSTI]

    Rajkumar, Ragunathan "Raj"

    driven by redundant actuators connected to redundant hydraulic systems. Moreover, the control law expensive in terms of both the design and development, as well as the unit production costs. To bring high measurements of the same signal. We are investigating an alternative three-pronged approach to fault detection

  18. Fault-tolerant Sensor Network based on Fault Evaluation Matrix and Compensation for Intermittent Observation

    E-Print Network [OSTI]

    Fault-tolerant Sensor Network based on Fault Evaluation Matrix and Compensation for Intermittent-tolerant sensor network configuration problem for a target navigation. A sensor network system consists of many sensor nodes and its network connections. Each sensor node can exchange information by wireless

  19. Realization of User Level Fault Tolerant Policy Management through a Holistic Approach for Fault Correlation

    SciTech Connect (OSTI)

    Park, Byung H [ORNL; Naughton, III, Thomas J [ORNL; Agarwal, Pratul K [ORNL; Bernholdt, David E [ORNL; Geist, Al [ORNL; Tippens, Jennifer L [ORNL

    2011-01-01

    Many modern scientific applications, which are designed to utilize high performance parallel com- puters, occupy hundreds of thousands of computational cores running for days or even weeks. Since many scien- tists compete for resources, most supercomputing centers practice strict scheduling policies and perform meticulous accounting on their usage. Thus computing resources and time assigned to a user is considered invaluable. However, most applications are not well prepared for un- foreseeable faults, still relying on primitive fault tolerance techniques. Considering that ever-plunging mean time to interrupt (MTTI) is making scientific applications more vulnerable to faults, it is increasingly important to provide users not only an improved fault tolerant environment, but also a framework to support their own fault tolerance policies so that their allocation times can be best utilized. This paper addresses a user level fault tolerance policy management based on a holistic approach to digest and correlate fault related information. It introduces simple semantics with which users express their policies on faults, and illustrates how event correlation techniques can be applied to manage and determine the most preferable user policies. The paper also discusses an implementation of the framework using open source software, and demonstrates, as an example, how a molecular dynamics simulation application running on the institutional cluster at Oak Ridge National Laboratory benefits from it.

  20. Collateral damage: Evolution with displacement of fracture distribution and secondary fault strands in fault

    E-Print Network [OSTI]

    Savage, Heather M.

    Collateral damage: Evolution with displacement of fracture distribution and secondary fault strands in fault damage zones Heather M. Savage1,2 and Emily E. Brodsky1 Received 22 April 2010; revised 10 of fracture distributions as a function of displacement to determine whether damage around small and large

  1. Measuring and Modeling Fault Density for Plume-Fault Encounter Probability Estimation

    SciTech Connect (OSTI)

    Jordan, P.D.; Oldenburg, C.M.; Nicot, J.-P.

    2011-05-15

    Emission of carbon dioxide from fossil-fueled power generation stations contributes to global climate change. Storage of this carbon dioxide within the pores of geologic strata (geologic carbon storage) is one approach to mitigating the climate change that would otherwise occur. The large storage volume needed for this mitigation requires injection into brine-filled pore space in reservoir strata overlain by cap rocks. One of the main concerns of storage in such rocks is leakage via faults. In the early stages of site selection, site-specific fault coverages are often not available. This necessitates a method for using available fault data to develop an estimate of the likelihood of injected carbon dioxide encountering and migrating up a fault, primarily due to buoyancy. Fault population statistics provide one of the main inputs to calculate the encounter probability. Previous fault population statistics work is shown to be applicable to areal fault density statistics. This result is applied to a case study in the southern portion of the San Joaquin Basin with the result that the probability of a carbon dioxide plume from a previously planned injection had a 3% chance of encountering a fully seal offsetting fault.

  2. Demonstrations of Integrated Advanced Rooftop Unit Controls and...

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

    Demonstrations of Integrated Advanced Rooftop Unit Controls and Automated Fault Detection and Diagnostics - 2014 BTO Peer Review Demonstrations of Integrated Advanced Rooftop Unit...

  3. Signal Processing 82 (2002) 853859 www.elsevier.com/locate/sigpro

    E-Print Network [OSTI]

    Ray, Asok

    2002-01-01

    Signal Processing 82 (2002) 853­859 www.elsevier.com/locate/sigpro Short communication Detection, Shashi Phoha / Signal Processing 82 (2002) 853­859 j=0; 1; 2; : : : ; M , of their occurrence at the kth and identiÿcation of potential faults from continuous sensor signals. The usage of the recursive algorithm

  4. Temporal data mining for root-cause analysis of machine faults in automotive assembly lines

    E-Print Network [OSTI]

    Laxman, Srivatsan; Unnikrishnan, K P; Sastry, P S

    2009-01-01

    Engine assembly is a complex and heavily automated distributed-control process, with large amounts of faults data logged everyday. We describe an application of temporal data mining for analyzing fault logs in an engine assembly plant. Frequent episode discovery framework is a model-free method that can be used to deduce (temporal) correlations among events from the logs in an efficient manner. In addition to being theoretically elegant and computationally efficient, frequent episodes are also easy to interpret in the form actionable recommendations. Incorporation of domain-specific information is critical to successful application of the method for analyzing fault logs in the manufacturing domain. We show how domain-specific knowledge can be incorporated using heuristic rules that act as pre-filters and post-filters to frequent episode discovery. The system described here is currently being used in one of the engine assembly plants of General Motors and is planned for adaptation in other plants. To the best ...

  5. Method of locating underground mines fires

    DOE Patents [OSTI]

    Laage, Linneas (Eagam, MN); Pomroy, William (St. Paul, MN)

    1992-01-01

    An improved method of locating an underground mine fire by comparing the pattern of measured combustion product arrival times at detector locations with a real time computer-generated array of simulated patterns. A number of electronic fire detection devices are linked thru telemetry to a control station on the surface. The mine's ventilation is modeled on a digital computer using network analysis software. The time reguired to locate a fire consists of the time required to model the mines' ventilation, generate the arrival time array, scan the array, and to match measured arrival time patterns to the simulated patterns.

  6. Faulted joints: kinematics, displacementlength scaling relations and criteria for their identication

    E-Print Network [OSTI]

    Engelder, Terry

    and kinematics based on two sets of joints, pinnate joints and fault striations, reveal that some mesoscale faults (i.e., faults without linked fault segments) at the mesoscale: ªneoformed faultsº which form

  7. A Hybrid Model Based and Statistical Fault Diagnosis System for Industrial Process 

    E-Print Network [OSTI]

    Lin, Chen-Han

    2014-11-21

    This thesis presents a hybrid model based and statistical fault diagnosis system, which applied on the nonlinear three-tank model. The purpose of fault diagnosis is generating and analyzing the residual to find out the fault occurrence. This fault...

  8. A Revised Interpretation of 3D Seismic Data, Hawthorne Army Depot, Nevada: FaultedBasin Reflections or Sill Intrusions?

    E-Print Network [OSTI]

    of the Great Basin containing numerous extensional geothermal systems (Surpless, 2008; Oldow, 2003). A 3d to possible controlling structures within an extensional geothermal system. In areas of extensional geothermal systems, fluid flow is commonly controlled by faults and crustal thinning provides heat

  9. Investigations of stacking fault density in perpendicular recording media

    SciTech Connect (OSTI)

    Piramanayagam, S. N. Varghese, Binni; Yang, Yi; Kiat Lee, Wee; Khume Tan, Hang

    2014-06-28

    In magnetic recording media, the grains or clusters reverse their magnetization over a range of reversal field, resulting in a switching field distribution. In order to achieve high areal densities, it is desirable to understand and minimize such a distribution. Clusters of grains which contain stacking faults (SF) or fcc phase have lower anisotropy, an order lower than those without them. It is believed that such low anisotropy regions reverse their magnetization at a much lower reversal field than the rest of the material with a larger anisotropy. Such clusters/grains cause recording performance deterioration, such as adjacent track erasure and dc noise. Therefore, the observation of clusters that reverse at very low reversal fields (nucleation sites, NS) could give information on the noise and the adjacent track erasure. Potentially, the observed clusters could also provide information on the SF. In this paper, we study the reversal of nucleation sites in granular perpendicular media based on a magnetic force microscope (MFM) methodology and validate the observations with high resolution cross-section transmission electron microscopy (HRTEM) measurements. Samples, wherein a high anisotropy CoPt layer was introduced to control the NS or SF in a systematic way, were evaluated by MFM, TEM, and magnetometry. The magnetic properties indicated that the thickness of the CoPt layer results in an increase of nucleation sites. TEM measurements indicated a correlation between the thickness of CoPt layer and the stacking fault density. A clear correlation was also observed between the MFM results, TEM observations, and the coercivity and nucleation field of the samples, validating the effectiveness of the proposed method in evaluating the nucleation sites which potentially arise from stacking faults.

  10. Electric current locator

    DOE Patents [OSTI]

    King, Paul E. (Corvallis, OR); Woodside, Charles Rigel (Corvallis, OR)

    2012-02-07

    The disclosure herein provides an apparatus for location of a quantity of current vectors in an electrical device, where the current vector has a known direction and a known relative magnitude to an input current supplied to the electrical device. Mathematical constants used in Biot-Savart superposition equations are determined for the electrical device, the orientation of the apparatus, and relative magnitude of the current vector and the input current, and the apparatus utilizes magnetic field sensors oriented to a sensing plane to provide current vector location based on the solution of the Biot-Savart superposition equations. Description of required orientations between the apparatus and the electrical device are disclosed and various methods of determining the mathematical constants are presented.

  11. Fault-tolerant three-level inverter

    DOE Patents [OSTI]

    Edwards, John; Xu, Longya; Bhargava, Brij B.

    2006-12-05

    A method for driving a neutral point clamped three-level inverter is provided. In one exemplary embodiment, DC current is received at a neutral point-clamped three-level inverter. The inverter has a plurality of nodes including first, second and third output nodes. The inverter also has a plurality of switches. Faults are checked for in the inverter and predetermined switches are automatically activated responsive to a detected fault such that three-phase electrical power is provided at the output nodes.

  12. Development of a bridge fault extractor tool 

    E-Print Network [OSTI]

    Bhat, Nandan D.

    2005-02-17

    are tools that analyze chip layouts and produce a realistic list of bridging faults within that chip. FedEx, previously developed at Texas A&M University, extracts all two-node intralayer bridges of any given chip layout and optionally extracts all two...) for this tool which aids in more effectively visualizing the bridge faults across the chip. The final aim of this thesis was to perform FedEx output analysis to understand the nature of the defects, such as variation of critical area (the area where...

  13. Motivation Methodology Conclusions A Fault Tolerance Bisimulation Proof for

    E-Print Network [OSTI]

    Francalanza, Adrian

    Motivation Methodology Conclusions A Fault Tolerance Bisimulation Proof for Consensus Adrian of Somewhere and Elsewhere A Fault Tolerance Bisimulation Proof for Consensus #12;Motivation Methodology Conclusions Outline 1 Motivation 2 Methodology 3 Conclusions Adrian Francalanza, Matthew Hennessy Universities

  14. Upper crustal faulting in an obliquely extending orogen, structural...

    Open Energy Info (EERE)

    field in the central Coso Range, eastern California, image brittle faults and other structures in a zone of localized crustal extension between two major strike-slip faults. The...

  15. Occupancy Based Fault Detection on Building Level - a Feasibility Study 

    E-Print Network [OSTI]

    Tuip, B.; Houten, M.; Trcka, M.; Hensen, M.

    2010-01-01

    -line, self learning fault detection tool on building level. Taking passive user behavior into account, the tool aims to distinguish real faults from unexpected user behavior. An artificial neural network model is used to predict building energy consumption...

  16. Two Similarity Measure Approaches to Whole Building Fault Diagnosis 

    E-Print Network [OSTI]

    Lin, G.; Claridge, D.

    2012-01-01

    similarity are defined and the methodology for implementing the proposed whole building fault diagnosis approaches is presented. Cosine similarity and Euclidean distance similarity are applied to two field observed fault test cases, and both the cosine...

  17. Dining philosophers with masking tolerance to crash faults 

    E-Print Network [OSTI]

    Idimadakala, Vijaya K.

    2009-05-15

    We examine the tolerance of dining philosopher algorithms subject to process crash faults in arbitrary conflict graphs. This classic problem is unsolvable in asynchronous message-passing systems subject to even a single crash fault. By contrast...

  18. Synthesis and evaluation of fault-tolerant quantum computer architectures

    E-Print Network [OSTI]

    Cross, Andrew W. (Andrew William), 1979-

    2005-01-01

    Fault-tolerance is the cornerstone of practical, large-scale quantum computing, pushed into its prominent position with heroic theoretical efforts. The fault-tolerance threshold, which is the component failure probability ...

  19. Development of a Hydrologic Characterization Technology for Fault Zones Final Report

    E-Print Network [OSTI]

    Karasaki, Kenzi

    2014-01-01

    times by triggering a GFCI (Ground Fault Circuit Interrupt).time, rain caused a GFCI (ground fault circuit interrupt),

  20. Detailed Geophysical Fault Characterization in Yucca Flat, Nevada Test Site, Nevada

    SciTech Connect (OSTI)

    Theodore H. Asch; Donald Sweetkind; Bethany L. Burton; Erin L. Wallin

    2009-02-10

    Yucca Flat is a topographic and structural basin in the northeastern part of the Nevada Test Site (NTS) in Nye County, Nevada. Between the years 1951 and 1992, 659 underground nuclear tests took place in Yucca Flat; most were conducted in large, vertical excavations that penetrated alluvium and the underlying Cenozoic volcanic rocks. Radioactive and other potential chemical contaminants at the NTS are the subject of a long-term program of investigation and remediation by the U.S. Department of Energy (DOE), National Nuclear Security Administration, Nevada Site Office, under its Environmental Restoration Program. As part of the program, the DOE seeks to assess the extent of contamination and to evaluate the potential risks to humans and the environment from byproducts of weapons testing. To accomplish this objective, the DOE Environmental Restoration Program is constructing and calibrating a ground-water flow model to predict hydrologic flow in Yucca Flat as part of an effort to quantify the subsurface hydrology of the Nevada Test Site. A necessary part of calibrating and evaluating a model of the flow system is an understanding of the location and characteristics of faults that may influence ground-water flow. In addition, knowledge of fault-zone architecture and physical properties is a fundamental component of the containment of the contamination from underground nuclear tests, should such testing ever resume at the Nevada Test Site. The goal of the present investigation is to develop a detailed understanding of the geometry and physical properties of fault zones in Yucca Flat. This study was designed to investigate faults in greater detail and to characterize fault geometry, the presence of fault splays, and the fault-zone width. Integrated geological and geophysical studies have been designed and implemented to work toward this goal. This report describes the geophysical surveys conducted near two drill holes in Yucca Flat, the data analyses performed, and the integrated interpretations developed from the suite of geophysical methodologies utilized in this investigation. Data collection for this activity started in the spring of 2005 and continued into 2006. A suite of electrical geophysical surveys were run in combination with ground magnetic surveys; these surveys resulted in high-resolution subsurface data that portray subsurface fault geometry at the two sites and have identified structures not readily apparent from surface geologic mapping, potential field geophysical data, or surface effects fracture maps.

  1. Fault-Tolerant Non-interference Extended Version

    E-Print Network [OSTI]

    Russo, Alejandro

    a fault (induced by holding a light-bulb near the processor!) triggers a single bit flip in a malicious

  2. Adjustable direct current and pulsed circuit fault current limiter

    DOE Patents [OSTI]

    Boenig, Heinrich J.; Schillig, Josef B.

    2003-09-23

    A fault current limiting system for direct current circuits and for pulsed power circuit. In the circuits, a current source biases a diode that is in series with the circuits' transmission line. If fault current in a circuit exceeds current from the current source biasing the diode open, the diode will cease conducting and route the fault current through the current source and an inductor. This limits the rate of rise and the peak value of the fault current.

  3. Deep drilling phase of the Pen Brand Fault Program

    SciTech Connect (OSTI)

    Stieve, A.

    1991-05-15

    This deep drilling activity is one element of the Pen Branch Fault Program at Savannah River Site (SRS). The effort will consist of three tasks: the extension of wells PBF-7 and PBF-8 into crystalline basement, geologic and drilling oversight during drilling operations, and the lithologic description and analysis of the recovered core. The drilling program addresses the association of the Pen Branch fault with order fault systems such as the fault that formed the Bunbarton basin in the Triassic.

  4. Detachment Faulting & Geothermal Resources- Pearl Hot Spring, NV

    Broader source: Energy.gov [DOE]

    Detachment Faulting & Geothermal Resources - Pearl Hot Spring, NV presentation at the April 2013 peer review meeting held in Denver, Colorado.

  5. Final Exam Location and Time

    E-Print Network [OSTI]

    Final Exam Location and Time. Math 162 Fall 2001. Date: Wednesday December 12, 2001. Time: 7:00 pm -9:00 pm. Location: Lambert Fieldhouse ...

  6. Final Exam Location and Time

    E-Print Network [OSTI]

    Final Exam Location and Time. Math 161 Fall 2001. Date: Friday December 14, 2001. Time: 8:00 am -10:00 am. Location: Lambert Fieldhouse ...

  7. Locating an active fault zone in Coso geothermal field by analyzing seismic

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History ViewInformationWindsCompressedListguided waves from microearthquake

  8. ELECTROMAGNETIC IMAGES OF THE TINTINA FAULT (NORTHERN CANADIAN CORDILLERA)

    E-Print Network [OSTI]

    Jones, Alan G.

    ELECTROMAGNETIC IMAGES OF THE TINTINA FAULT (NORTHERN CANADIAN CORDILLERA) Juanjo Ledo1 , Alan G to obtain a crustal scale electromagnetic image of the fault. A short, higher station density profile-dimensional (2- D) electromagnetic behavior of the fault. Distortion decomposition of the responses corroborated

  9. NASA Technical Memorandum 89098 The Fault-Tree Compiler

    E-Print Network [OSTI]

    Butler, Ricky W.

    L - NASA Technical Memorandum 89098 The Fault-Tree Compiler Anna L. Martensen Ricky W. Butler in preliminary design analysis. The goal of the Fault Tree Compiler (m)program is to provide the user with a tool also be performed, providing the user The motivation for the development of the Fault Tree Compiler

  10. Development of the Global Earthquake Model's neotectonic fault database

    E-Print Network [OSTI]

    New Hampshire, University of

    Development of the Global Earthquake Model's neotectonic fault database Annemarie Christophersen1 database and a unique graphical interface for the compilation of new fault data. A key design principle is that of an electronic field notebook for capturing observations a geologist would make about a fault. The database

  11. Synthesizing Round Based FaultTolerant Programs using Genetic Programming

    E-Print Network [OSTI]

    Fernandez, Thomas

    Synthesizing Round Based Fault­Tolerant Programs using Genetic Programming Ling Zhu and Sandeep based distributed fault­tolerant programs using stack based genetic pro­ gramming. Our approach evolves a fault­tolerant program based on a round based structure and the program specification. To permit

  12. Statistical estimation of multiple faults in aircraft gas turbine engines

    E-Print Network [OSTI]

    Ray, Asok

    415 Statistical estimation of multiple faults in aircraft gas turbine engines S Sarkar, C Rao of multiple faults in aircraft gas-turbine engines, based on a statistical pattern recognition tool called commercial aircraft engine. Keywords: aircraft propulsion, gas turbine engines, multiple fault estimation

  13. Online Fault Detection and Tolerance for Photovoltaic Energy Harvesting Systems

    E-Print Network [OSTI]

    Pedram, Massoud

    Online Fault Detection and Tolerance for Photovoltaic Energy Harvesting Systems Xue Lin 1 , Yanzhi, yanzhiwa, dizhu, pedram}@usc.edu, 2 naehyuck@elpl.snu.ac.kr ABSTRACT Photovoltaic energy harvesting systems, Performance, Reliability. Keywords Photovoltaic System, Fault Detection, Fault Tolerance, Photovoltaic Panel

  14. Symbolic Dynamic Analysis of Transient Time Series for Fault

    E-Print Network [OSTI]

    Ray, Asok

    Symbolic Dynamic Analysis of Transient Time Series for Fault Detection in Gas Turbine Engines paper presents a symbolic dynamics-based method for detection of incipient faults in gas turbine engines dynamics, fault detection, aircraft gas turbine engines 1 Introduction Performance monitoring of aircraft

  15. The effects of lithology and initial fault angle in physical models of fault-propagation folds 

    E-Print Network [OSTI]

    McLain, Christopher Thomas

    2001-01-01

    with a weak brittle layer that deforms by faulting and fracturing (dried pottery clay simulates an interbedded siliciclastic unit). The models were deformed in a triaxial deformation rig at confining pressure of 50 Mpa at room temperature. Each model...

  16. An algorithm for faulted phase and feeder selection under high impedance fault conditions 

    E-Print Network [OSTI]

    Benner, Carl Lee

    1988-01-01

    . One method based on increases in third and fifth harmonic symmetrical current components under high impedance fault conditions has been proposed by Balser et. Journal model is IEEE Transactions on Power Delivery. al, of Power Technologies Inc [1...

  17. Fault current limiter and alternating current circuit breaker

    DOE Patents [OSTI]

    Boenig, H.J.

    1998-03-10

    A solid-state circuit breaker and current limiter are disclosed for a load served by an alternating current source having a source impedance, the solid-state circuit breaker and current limiter comprising a thyristor bridge interposed between the alternating current source and the load, the thyristor bridge having four thyristor legs and four nodes, with a first node connected to the alternating current source, and a second node connected to the load. A coil is connected from a third node to a fourth node, the coil having an impedance of a value calculated to limit the current flowing therethrough to a predetermined value. Control means are connected to the thyristor legs for limiting the alternating current flow to the load under fault conditions to a predetermined level, and for gating the thyristor bridge under fault conditions to quickly reduce alternating current flowing therethrough to zero and thereafter to maintain the thyristor bridge in an electrically open condition preventing the alternating current from flowing therethrough for a predetermined period of time. 9 figs.

  18. Fault current limiter and alternating current circuit breaker

    DOE Patents [OSTI]

    Boenig, Heinrich J. (Los Alamos, NM)

    1998-01-01

    A solid-state circuit breaker and current limiter for a load served by an alternating current source having a source impedance, the solid-state circuit breaker and current limiter comprising a thyristor bridge interposed between the alternating current source and the load, the thyristor bridge having four thyristor legs and four nodes, with a first node connected to the alternating current source, and a second node connected to the load. A coil is connected from a third node to a fourth node, the coil having an impedance of a value calculated to limit the current flowing therethrough to a predetermined value. Control means are connected to the thyristor legs for limiting the alternating current flow to the load under fault conditions to a predetermined level, and for gating the thyristor bridge under fault conditions to quickly reduce alternating current flowing therethrough to zero and thereafter to maintain the thyristor bridge in an electrically open condition preventing the alternating current from flowing therethrough for a predetermined period of time.

  19. Unifying sensor fault detection with energy conservation

    E-Print Network [OSTI]

    Dobson, Simon

    Unifying sensor fault detection with energy conservation Lei Fang and Simon Dobson School energy usage. Section 2 presents our framework, which is evaluated in section 3 by means of some reliability. Sensors are often energy-hungry and cannot operate over the long term, and the data they gather

  20. Symmetrical Fault Analysis 1.0 Definition

    E-Print Network [OSTI]

    McCalley, James D.

    , shunt admittances, and -Y phase shifts are neglected. Synchronous machines (generators and motors-286]. We begin with the simplest of examples. 3.0 Example Consider a single generator supplying an R that will be faulted). Eg: steady-state internal gen voltage Xd: synchronous (steady-state) reactance IL: load

  1. All row, planar fault detection system

    DOE Patents [OSTI]

    Archer, Charles Jens; Pinnow, Kurt Walter; Ratterman, Joseph D; Smith, Brian Edward

    2013-07-23

    An apparatus, program product and method for detecting nodal faults may simultaneously cause designated nodes of a cell to communicate with all nodes adjacent to each of the designated nodes. Furthermore, all nodes along the axes of the designated nodes are made to communicate with their adjacent nodes, and the communications are analyzed to determine if a node or connection is faulty.

  2. Safety Requirements and Fault Trees using Retrenchment

    E-Print Network [OSTI]

    Banach, Richard

    this initial model has been created, the elicitation of safety requirements yields a fresh set of criteria are applied, the information linking the design and the safety assessment phases is often carried outSafety Requirements and Fault Trees using Retrenchment R. Banach and R. Cross Computer Science

  3. Structural Controls on Growth Stratigraphy in Contractional

    E-Print Network [OSTI]

    Connors, Christopher D.

    Structural Controls on Growth Stratigraphy in Contractional Fault-related Folds John H. Shaw Dept stratigraphy. An understanding of this interplay between local deformation and dep- osition helps us infer on growth stratigraphy in contractional fault-related folds, in K. R. McClay, ed., Thrust tectonics

  4. Location, location, location: utilizing pipelines and services to more effectively georeference the world's biodiversity data

    E-Print Network [OSTI]

    2009-01-01

    location, location: utilizing pipelines and services to morebut also to create pipelines integrated with humanbecome available [8]. These pipelines can be developed to

  5. Stress and fault rock controls on fault zone hydrology, Coso geothermal

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EIS ReportEurope GmbHSoloPageBeforeCreek Wind FarmStratton

  6. Coordinated Fault Tolerance for High-Performance Computing

    SciTech Connect (OSTI)

    Dongarra, Jack; Bosilca, George; et al.

    2013-04-08

    Our work to meet our goal of end-to-end fault tolerance has focused on two areas: (1) improving fault tolerance in various software currently available and widely used throughout the HEC domain and (2) using fault information exchange and coordination to achieve holistic, systemwide fault tolerance and understanding how to design and implement interfaces for integrating fault tolerance features for multiple layers of the software stack—from the application, math libraries, and programming language runtime to other common system software such as jobs schedulers, resource managers, and monitoring tools.

  7. Qubit metrology for building a fault-tolerant quantum computer

    E-Print Network [OSTI]

    John M. Martinis

    2015-10-06

    Recent progress in quantum information has led to the start of several large national and industrial efforts to build a quantum computer. Researchers are now working to overcome many scientific and technological challenges. The program's biggest obstacle, a potential showstopper for the entire effort, is the need for high-fidelity qubit operations in a scalable architecture. This challenge arises from the fundamental fragility of quantum information, which can only be overcome with quantum error correction. In a fault-tolerant quantum computer the qubits and their logic interactions must have errors below a threshold: scaling up with more and more qubits then brings the net error probability down to appropriate levels ~ $10^{-18}$ needed for running complex algorithms. Reducing error requires solving problems in physics, control, materials and fabrication, which differ for every implementation. I explain here the common key driver for continued improvement - the metrology of qubit errors.

  8. The Cricket indoor location system

    E-Print Network [OSTI]

    Priyantha, Nissanka Bodhi, 1968-

    2005-01-01

    Indoor environments present opportunities for a rich set of location-aware applications such as navigation tools for humans and robots, interactive virtual games, resource discovery, asset tracking, location-aware sensor ...

  9. Search Text Based on Locations 

    E-Print Network [OSTI]

    Zhang, Weiwei

    2014-11-21

    locations, which contributes to the Geographical Information Retrieval (GIR) systems. In addition to the traditional applications of GIR systems, which are used for finding locations in documents, GIR can be applied to other fields as well. Firstly, it can...

  10. Undulator Hall Air Temperature Fault Scenarios

    SciTech Connect (OSTI)

    Sevilla, J.; Welch, J.; ,

    2010-11-17

    Recent experience indicates that the LCLS undulator segments must not, at any time following tuning, be allowed to change temperature by more than about {+-}2.5 C or the magnetic center will irreversibly shift outside of acceptable tolerances. This vulnerability raises a concern that under fault conditions the ambient temperature in the Undulator Hall might go outside of the safe range and potentially could require removal and retuning of all the segments. In this note we estimate changes that can be expected in the Undulator Hall air temperature for three fault scenarios: (1) System-wide power failure; (2) Heating Ventilation and Air Conditioning (HVAC) system shutdown; and (3) HVAC system temperature regulation fault. We find that for either a system-wide power failure or an HVAC system shutdown (with the technical equipment left on), the short-term temperature changes of the air would be modest due to the ability of the walls and floor to act as a heat ballast. No action would be needed to protect the undulator system in the event of a system-wide power failure. Some action to adjust the heat balance, in the case of the HVAC power failure with the equipment left on, might be desirable but is not required. On the other hand, a temperature regulation failure of the HVAC system can quickly cause large excursions in air temperature and prompt action would be required to avoid damage to the undulator system.

  11. Development of Integrated Meso/Microscale Traffic Simulation Software for Testing Fault Detection and Handling in AHS

    E-Print Network [OSTI]

    Horowitz, Roberto

    2004-01-01

    Traffic Simulation Software for Testing Fault Detection andTraf?c Simulation Software for Testing Fault Detection andTraf?c Simulation Software for Testing Fault Detection and

  12. Features and Dimensions of the Hayward fault zone in the Strawberry and Blackberry Creek Area Berkeley, California

    E-Print Network [OSTI]

    Williams, P.L.

    2011-01-01

    Hayward Fault Zone in the Strawberry and Blackberry Creekward Fault Zone in the Strawberry and Blackberry Creek Area,Hayward fault zone in the Strawberry and Blackberry Creek

  13. Zhiyu Jiang, Department of Marine Technology & Centre for Ships and Ocean Structures Dynamic response of wind turbines in fault and

    E-Print Network [OSTI]

    Nørvåg, Kjetil

    response of wind turbines in fault and shutdown conditions Zhiyu Jiang Deptartment of Marine Technology://www.newscientist.com/blogs/onepercent/2011/12/why-did-a-wind-turbine-self-co.html #12;3 Zhiyu Jiang, Department of Marine Technology & Centre & Centre for Ships and Ocean Structures Control and protection of wind turbines Emergency shutdown Pitch

  14. Similarity Matching Techniques for Fault Diagnosis in Automotive Infotainment Electronics

    E-Print Network [OSTI]

    Kabir, Mashud

    2009-01-01

    Fault diagnosis has become a very important area of research during the last decade due to the advancement of mechanical and electrical systems in industries. The automobile is a crucial field where fault diagnosis is given a special attention. Due to the increasing complexity and newly added features in vehicles, a comprehensive study has to be performed in order to achieve an appropriate diagnosis model. A diagnosis system is capable of identifying the faults of a system by investigating the observable effects (or symptoms). The system categorizes the fault into a diagnosis class and identifies a probable cause based on the supplied fault symptoms. Fault categorization and identification are done using similarity matching techniques. The development of diagnosis classes is done by making use of previous experience, knowledge or information within an application area. The necessary information used may come from several sources of knowledge, such as from system analysis. In this paper similarity matching tec...

  15. Fault Tolerant Deployment and Topology Control in Wireless Networks

    E-Print Network [OSTI]

    Li, Xiang-Yang

    region. Given n wireless nodes V , each with transmission range rn, the wireless networks are often rn. We first consider how the transmission range is related with the number of nodes in a fixed area, the length of the shortest path connecting them in H is no more than a small constant factor of the length

  16. Model identification with application to building control and fault detection

    E-Print Network [OSTI]

    Armstrong, Peter Ross, 1950-

    2004-01-01

    (cont.) may still be solved as an unconstrained linear least squares problem. To enforce the constraint on system eigenvalues, the problem is formulated as an unconstrained mixed (linear and non-linear) least-squares ...

  17. Type E: Extensional Tectonic, Fault-Controlled Resource | Open Energy

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EISTJThin Film SolarTown(LECBP) | OpenTrackI Wind FarmInformation

  18. Upper crustal faulting in an obliquely extending orogen, structural control

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EISTJThin FilmUnited States: EnergyUpper Cumberland E M C Jumpon

  19. Location, location, location: The variable value of renewable energy and demand-side efficiency resources

    E-Print Network [OSTI]

    Fowlie, Meredith

    and renewable energy resources. We eval- uate renewable energy (RE) and energy efficiency (EE) technologiesLocation, location, location: The variable value of renewable energy and demand-side efficiency mitigation efforts in the electricity sector emphasize accelerated deployment of energy efficiency measures

  20. Fault-induced delayed voltage recovery in a long inhomogeneous...

    Office of Scientific and Technical Information (OSTI)

    Article: Fault-induced delayed voltage recovery in a long inhomogeneous power-distribution feeder Citation Details In-Document Search This content will become publicly...

  1. Fault Tolerant Evaluation of Continuous Selection Queries over Sensor Data

    E-Print Network [OSTI]

    Lazaridis, Iosif; Han, Qi; Mehrotra, Sharad; Venkatasubramanian, Nalini

    2009-01-01

    Evaluation of Continuous Selection Queries over Sensor Dataevaluation of continuous selection queries (CSQs) over sensor-sensor suffices and there is no Fault Tolerant Evaluation of

  2. STRESS AND FAULTING IN THE COSO GEOTHERMAL FIELD: UPDATE AND...

    Open Energy Info (EERE)

    108 24 in a transitional strike-slip to normal faulting stress regime. These structures bound regions of intense micro-seismicity and are complexly associated with surface...

  3. Dating of major normal fault systems using thermochronology-...

    Open Energy Info (EERE)

    faults, timing of ductile mylonite formation and passage of rocks through the crystal-plastic to brittle transition, and multiple events of extensional unroofing. Here we...

  4. Post-Cretaceous faulting at head of Mississippi embayment

    SciTech Connect (OSTI)

    Nelson, W.J. (Illinois State Geological Survey, Champaign, IL (United States)); Harrison, R.W. (Geological Survey, Reston, VA (United States))

    1993-03-01

    Recent mapping in southernmost Illinois and southeastern Missouri has revealed numerous faults that displace Cretaceous and Tertiary strata. Units as young as the Pliocene-Pleistocene( ) Mounds Gravel are deformed; some faults possibly displace Quaternary sediments. The faults strike northeast, dip nearly vertically, and exhibit characteristics of dextral strike-slip. Pull-apart grabens occur along right-stepping fault strands, they contain chaotically jumbled blocks of Paleozoic, Cretaceous and Tertiary rocks downdropped as much as 800 m relative to wall rocks. Faults at the head of the Mississippi embayment probably originated during Cambrian rifting (Reelfoot rift) and have a long, complex history of reactivation under different stress fields. Some faults are on strike with faults in the New Madrid seismic zone. Kinematics of post-Cretaceous displacements fit the contemporary stress regime of ENE-WSW compression. Similar fault orientations and kinematics, as well as close proximity, suggest a close link between faulting at the head of the embayment and ongoing tectonism in the New Madrid seismic zone.

  5. Recurrent faulting and petroleum accumulation, Cat Creek Anticline, central Montana

    SciTech Connect (OSTI)

    Nelson, W.J. (Illinois State Geological Survey, Champaign (United States))

    1991-06-01

    The Cat Creek anticline, scene of central Montana's first significant oil discovery, is underlain by a south-dipping high-angle fault (Cat Creek fault) that has undergone several episodes of movement with opposite sense of displacement. Borehole data suggest that the Cat Creek fault originated as a normal fault during Proterozoic rifting concurrent with deposition of the Belt Supergroup. Reverse faulting took place in Late Cambrian time, and again near the end of the Devonian Period. The Devonian episode, coeval with the Antler orogeny, raised the southern block several hundred feet. The southern block remained high through Meramecian time, then began to subside. Post-Atokan, pre-Middle Jurassic normal faulting lowered the southern block as much as 1,500 ft. During the Laramide orogeny (latest Cretaceous-Eocene) the Cat Creek fault underwent as much as 4,000 ft of reverse displacement and a comparable amount of left-lateral displacement. The Cat Creek anticline is a fault-propagation fold; en echelon domes and listric normal faults developed along its crest in response to wrenching. Oil was generated mainly in organic-rich shales of the Heath Formation (upper Chesterian Series) and migrated upward along tectonic fractures into Pennsylvanian, Jurassic, and Cretaceous reservoir rocks in structural traps in en echelon domes. Production has been achieved only from those domes where structural closure was retained from Jurassic through Holocene time.

  6. MODELING AND SIMULATION OF HVAC FAULTS IN ENERGYPLUS

    E-Print Network [OSTI]

    Basarkar, Mangesh

    2013-01-01

    and simulated building energy performance, Norford et al. (faults on whole building performance – energy consumption,and simulated energy performance of buildings is that most

  7. Recency of Faulting and Neotectonic Framework in the Dixie Valley...

    Open Energy Info (EERE)

    by active geothermal springs. More specifically, our investigation shows that induced stress concentrations at the endpoints of normal fault ruptures appear to promote favorable...

  8. Recency Of Faulting And Neotechtonic Framework In The Dixie Valley...

    Open Energy Info (EERE)

    by active geothermal springs. More specifically, our investigation shows that induced stress concentrations at the endpoints of normal fault ruptures appear to promote favorable...

  9. Fault-tolerant distributed transactions for partitioned OLTP databases

    E-Print Network [OSTI]

    Jones, Evan P. C. (Evan Philip Charles), 1981-

    2012-01-01

    This thesis presents Dtxn, a fault-tolerant distributed transaction system designed specifically for building online transaction processing (OLTP) databases. Databases have traditionally been designed as general purpose ...

  10. Arc-Fault Detector Algorithm Evaluation Method Utilizing Prerecorded...

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

    Electrical Code Article 690.11 requires photovoltaic systems on or penetrating a building to include a DC arc-fault protection device. In order to satisfy this...

  11. Checksum-Based Fault Tolerance for LU Factorization

    E-Print Network [OSTI]

    Davies, Teresa

    2014-01-01

    study of failures in high-performance computing systems. InFault tolerant high performance computing by a codingfor large-scale high- performance computing. In 2012

  12. Effects of Volcanism, Crustal Thickness, and Large Scale Faulting...

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

    Effects of Volcanism, Crustal Thickness, and Large Scale Faulting on the Development and Evolution of Geothermal Systems: Collaborative Project in Chile Effects of Volcanism,...

  13. MICRO-SEISMICITY, FAULT STRUCTURE AND HYDRAULIC COMPARTMENTALIZATION...

    Open Energy Info (EERE)

    LibraryAdd to library Conference Proceedings: MICRO-SEISMICITY, FAULT STRUCTURE AND HYDRAULIC COMPARTMENTALIZATION WITHIN THE COSO GETHERMAL FIELD, CALIFORNIA Abstract High...

  14. PV Arc Fault Detector Challenges Due to Module Frequency Response...

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

    This poster does not contain any proprietary or confidential information. Introduction PV system arc faults have led to a number of rooftop fires which have caused significant...

  15. A Comparison of Fault Detection Methods For a Transcritical Refrigeration System 

    E-Print Network [OSTI]

    Janecke, Alex Karl

    2012-10-19

    pairings of four faults: over/undercharge, evaporator fouling, gas cooler fouling, and compressor valve leakage. This technique allows for low cost measurement and independent detection of individual faults even when multiple faults are present. Results...

  16. Neural Network-Based Classification of Single-Phase Distribution Transformer Fault Data 

    E-Print Network [OSTI]

    Zhang, Xujia

    2006-08-16

    The ultimate goal of this research is to develop an online, non-destructive, incipient fault detection system that is able to detect incipient faults in transformers and other electric equipment before the faults become ...

  17. Fluids migration and dynamics of a blocks-and-faults system

    E-Print Network [OSTI]

    1910-70-11

    Keywords: earthquake catalog, block model, fault, tectonic structure, fluid, fil- ...... nal vertical fault near upper vertices of adjacent internal blocks, and formation of ... acts near the right external vertical fault: fractures filled in with water emerge ...

  18. Evaluation of a Decoupling-Based Fault Detection and Diagnostic Technique - Part I: Field Emulation Evaluation 

    E-Print Network [OSTI]

    Li, H.; Braun, J.

    2006-01-01

    Existing methods addressing automated fault detection and diagnosis (FDD) for vapor compression air conditioning system have good performance for faults that occur individually, but they have difficulty in handling multiple-simultaneous faults...

  19. Hiding Location Information from Location-Based Services

    E-Print Network [OSTI]

    Hengartner, Urs

    that the architecture is powerful enough to support existing location- based services. Our architecture exploits Trusted-specific information is being accessed. I. INTRODUCTION The ubiquity of cellphones has lead to the introduction of a cellphone user (e.g., directions to a target location or a list of interesting, nearby places). Another

  20. Commencement Ceremony Department Time Location Department and Major Time Location

    E-Print Network [OSTI]

    Kaji, Hajime

    Engineering 15:30 Bldg. 63 Classroom 01 (2nd Fl.) Industrial and Management Systems Engineering 15:30 Bldg. 63 and Management 15:30 Bldg. 63 Classroom 01 (2nd Fl.) Department Time Location Department and Major Time Location:30 Bldg. 57 202 Modern Mechanical Engineering 10:30 Bldg. 57 202 Industrial and Management Systems

  1. Ground-Motion Simulations of Scenario Earthquakes on the Hayward Fault

    SciTech Connect (OSTI)

    Aagaard, B; Graves, R; Larsen, S; Ma, S; Rodgers, A; Ponce, D; Schwartz, D; Simpson, R; Graymer, R

    2009-03-09

    We compute ground motions in the San Francisco Bay area for 35 Mw 6.7-7.2 scenario earthquake ruptures involving the Hayward fault. The modeled scenarios vary in rupture length, hypocenter, slip distribution, rupture speed, and rise time. This collaborative effort involves five modeling groups, using different wave propagation codes and domains of various sizes and resolutions, computing long-period (T > 1-2 s) or broadband (T > 0.1 s) synthetic ground motions for overlapping subsets of the suite of scenarios. The simulations incorporate 3-D geologic structure and illustrate the dramatic increase in intensity of shaking for Mw 7.05 ruptures of the entire Hayward fault compared with Mw 6.76 ruptures of the southern two-thirds of the fault. The area subjected to shaking stronger than MMI VII increases from about 10% of the San Francisco Bay urban area in the Mw 6.76 events to more than 40% of the urban area for the Mw 7.05 events. Similarly, combined rupture of the Hayward and Rodgers Creek faults in a Mw 7.2 event extends shaking stronger than MMI VII to nearly 50% of the urban area. For a given rupture length, the synthetic ground motions exhibit the greatest sensitivity to the slip distribution and location inside or near the edge of sedimentary basins. The hypocenter also exerts a strong influence on the amplitude of the shaking due to rupture directivity. The synthetic waveforms exhibit a weaker sensitivity to the rupture speed and are relatively insensitive to the rise time. The ground motions from the simulations are generally consistent with Next Generation Attenuation ground-motion prediction models but contain long-period effects, such as rupture directivity and amplification in shallow sedimentary basins that are not fully captured by the ground-motion prediction models.

  2. Location Management for Mobile Devices

    E-Print Network [OSTI]

    Wilde, Erik

    2008-01-01

    general, and wireless and mobile devices in particular. Thelocation-enabled mobile devices and location-based services.information from mobile devices and making it available to

  3. Location-based information system for open spaces 

    E-Print Network [OSTI]

    Tejavanija, Kampanart

    2004-11-15

    positioning system (GPS) in providing location information, it is expected that this technology could be utilized to control and improve building construction and facility management productivity within building interior spaces as well. However, GPS cannot...

  4. Trends in Energy Management Technology - Part 4: Review of Advanced Applications in Energy Management, Control, and Information Systems

    E-Print Network [OSTI]

    Yee, Gaymond; Webster, Tom

    2003-01-01

    of Practice of Energy Management, Control, and Informationpdf Trends in Energy Management TechnologyAlgorithms Trends in Energy Management Technology Fault

  5. Fault Tolerant Arithmetic with Applications in Nanotechnology based Systems

    E-Print Network [OSTI]

    Rao, Wenjing

    Fault Tolerant Arithmetic with Applications in Nanotechnology based Systems Wenjing Rao UC San nanotechnologies have been displaying the Neg- ative Differential Resistance (NDR) characteristic, which makes them fault-tolerant arithmetic in NDR nanotechnologies. Specifically, we show how linear block codes can

  6. Automatic Fault Characterization via Abnormality-Enhanced Classification

    SciTech Connect (OSTI)

    Bronevetsky, G; Laguna, I; de Supinski, B R

    2010-12-20

    Enterprise and high-performance computing systems are growing extremely large and complex, employing hundreds to hundreds of thousands of processors and software/hardware stacks built by many people across many organizations. As the growing scale of these machines increases the frequency of faults, system complexity makes these faults difficult to detect and to diagnose. Current system management techniques, which focus primarily on efficient data access and query mechanisms, require system administrators to examine the behavior of various system services manually. Growing system complexity is making this manual process unmanageable: administrators require more effective management tools that can detect faults and help to identify their root causes. System administrators need timely notification when a fault is manifested that includes the type of fault, the time period in which it occurred and the processor on which it originated. Statistical modeling approaches can accurately characterize system behavior. However, the complex effects of system faults make these tools difficult to apply effectively. This paper investigates the application of classification and clustering algorithms to fault detection and characterization. We show experimentally that naively applying these methods achieves poor accuracy. Further, we design novel techniques that combine classification algorithms with information on the abnormality of application behavior to improve detection and characterization accuracy. Our experiments demonstrate that these techniques can detect and characterize faults with 65% accuracy, compared to just 5% accuracy for naive approaches.

  7. Fault current limiter with shield and adjacent cores

    DOE Patents [OSTI]

    Darmann, Francis Anthony; Moriconi, Franco; Hodge, Eoin Patrick

    2013-10-22

    In a fault current limiter (FCL) of a saturated core type having at least one coil wound around a high permeability material, a method of suppressing the time derivative of the fault current at the zero current point includes the following step: utilizing an electromagnetic screen or shield around the AC coil to suppress the time derivative current levels during zero current conditions.

  8. An Information Flow Model of Fault Detection Margaret C. Thompson ?

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    not be practical. Nonethe­ less, Relay provides insight into testing and fault de­ tection and suggests an approach and Computer Science Amherst, MA 01003 University of California Irvine, CA 92717 Abstract Relay is a model of how a fault causes a failure on execution of some test datum. This process begins with introduction

  9. Symbolic identification for fault detection in aircraft gas turbine engines

    E-Print Network [OSTI]

    Ray, Asok

    Symbolic identification for fault detection in aircraft gas turbine engines S Chakraborty, S Sarkar and computationally inexpensive technique of component-level fault detection in aircraft gas-turbine engines identification, gas turbine engines, language-theoretic analysis 1 INTRODUCTION The propulsion system of modern

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

    E-Print Network [OSTI]

    Dong, Ming

    --Distributed event detection, fault tolerance, sensor fusion, energy-efficiency, wireless sensor networks. æ 1 to choose a proper neighborhood size n for a sensor node in fault correction such that the energy could to achieve better detection and better balance between detection accuracy and energy usage. Our work makes

  11. Common Trends in Software Fault and Failure Data

    E-Print Network [OSTI]

    Goseva-Popstojanova, Katerina

    Common Trends in Software Fault and Failure Data Maggie Hamill, Member, IEEE, and Katerina Goseva with the findings from related studies. The consistency of several main trends across software systems in this paper-Popstojanova, Senior Member, IEEE Abstract--The benefits of the analysis of software faults and failures have been

  12. Fault Reporting Processes in Business-Critical Systems

    E-Print Network [OSTI]

    and reporting7 Quantitative and qualitativeHazard analysis vs. fault report analysis - DAIM 6 Qualitative projects4 Quantitative, explorativeFault report study of four projects3 Qualitative, descriptive and Information Science (IDI) University of Science and Technology (NTNU) Trondheim, Norway PhD thesis

  13. Fault Detection and Diagnosis Method for VAV Terminal Units 

    E-Print Network [OSTI]

    Miyata, M.; Yoshida, H.; Asada, M.; Wang, F.; Hashiguchi, S.

    2004-01-01

    This paper proposes two fault detection and diagnosis methods for VAV units without a sensor of supply air volume, and the results of applying these methods to a real building are presented. One method detects faults by applying a statistical method...

  14. SHIELD: A Fault-Tolerant MPI for an Infiniband Cluster

    E-Print Network [OSTI]

    Yeom, Heon Young

    SHIELD: A Fault-Tolerant MPI for an Infiniband Cluster Hyuck Han, Hyungsoo Jung, Jai Wug Kim, a successful solution has yet to be delivered to commercial vendors. This paper presents SHIELD, a prac- tical and easily-deployable fault-tolerant MPI and management system of MPI for an Infiniband cluster. SHIELD

  15. Original Article Multi-sensor information fusion for fault

    E-Print Network [OSTI]

    Ray, Asok

    The article addresses data-driven fault detection in commercial aircraft gas turbine engines in the framework is validated on the NASA C-MAPSS simulation test bed of aircraft gas turbine engines; both single is also addressed. Keywords Gas turbine engines, fault detection, information fusion Date received: 15 May

  16. Fault Detection, Identification and Accommodation for an Electro-hydraulic

    E-Print Network [OSTI]

    Yao, Bin

    in electro-hydraulic systems. It is well known fact that any realistic model of a hydraulic system suffersFault Detection, Identification and Accommodation for an Electro-hydraulic System: An Adaptive, such a scheme becomes a natural choice for designing robust fault detection algorithms for electro-hydraulic

  17. Multi-sensor Wireless System for Fault Detection in Induction Motors

    E-Print Network [OSTI]

    Tarkesh Esfahani, Ehsan

    2012-01-01

    2 Faults in Motors 2.1 Bearing Faultcombined faults in induction motors,” IEEE Transactions onV. Climente-Alarcon, “Induction motor diagnosis based on a

  18. Development of Integrated Meso/Microscale Traffic Simulation Software for Testing Fault Detection and Handling Algorithms in AHS: Final Report

    E-Print Network [OSTI]

    Horowitz, Roberto

    2003-01-01

    Traffic Simulation Software for Testing Fault Detection andTra?c Simulation Software for Testing Fault Detection and

  19. Mobile Alternative Fueling Station Locator

    SciTech Connect (OSTI)

    Not Available

    2009-04-01

    The Department of Energy's Alternative Fueling Station Locator is available on-the-go via cell phones, BlackBerrys, or other personal handheld devices. The mobile locator allows users to find the five closest biodiesel, electricity, E85, hydrogen, natural gas, and propane fueling sites using Google technology.

  20. Guide to the Library Locations

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Guide to the Libraries #12;Library Locations W.E.B. DU BOIS LIBRARY www.library.umass.edu 154 Hicks Way (413) 545-0150, (413) 545-2622 The Du Bois Library is the primary location for resources in education, geography, the humanities and fine arts, nursing, management, medicine, public health, and social

  1. Application-Specific Fault Tolerance via Data Access Characterization

    SciTech Connect (OSTI)

    Ali, Nawab; Krishnamoorthy, Sriram; Govind, Niranjan; Kowalski, Karol; Sadayappan, Ponnuswamy

    2011-08-30

    Recent trends in semiconductor technology and supercomputer design predict an increasing probability of faults during an application's execution. Designing an application that is resilient to system failures requires careful evaluation of the impact of various approaches on preserving key application state. In this paper, we present our experiences in an ongoing effort to make a large computational chemistry application fault tolerant. We construct the data access signatures of key application modules to evaluate alternative fault tolerance approaches. We present the instrumentation methodology, characterization of the application modules, and evaluation of fault tolerance techniques using the information collected. The application signatures developed capture application characteristics not traditionally revealed by performance tools. We believe these can be used in the design and evaluation of runtimes beyond fault tolerance.

  2. Feb. 11, 2008 Advanced Fault Tolerance Solutions for High Performance Computing 1/47 Advanced Fault Tolerance Solutions

    E-Print Network [OSTI]

    Engelmann, Christian

    Feb. 11, 2008 Advanced Fault Tolerance Solutions for High Performance Computing 1/47 RAS RAS Advanced Fault Tolerance Solutions for High Performance Computing Christian Engelmann Oak Ridge National Solutions for High Performance Computing 2/47 · Nation's largest energy laboratory · Nation's largest

  3. Rupture Dynamics of Strike-Slip Faults with Stepovers: From Conceptually Simplified to Realistically Complex Fault Systems 

    E-Print Network [OSTI]

    Liu, Zaifeng

    2014-05-05

    . The coupling effect of those two effects has also been studied. The possible correlation between the slip gradient nearby the first fault end and the ability of the rupture to jump over the structure stepover in the strike-slip fault system has been verified...

  4. Self field triggered superconducting fault current limiter

    DOE Patents [OSTI]

    Tekletsadik, Kasegn D. (Rexford, NY)

    2008-02-19

    A superconducting fault current limiter array with a plurality of superconductor elements arranged in a meanding array having an even number of supconductors parallel to each other and arranged in a plane that is parallel to an odd number of the plurality of superconductors, where the odd number of supconductors are parallel to each other and arranged in a plane that is parallel to the even number of the plurality of superconductors, when viewed from a top view. The even number of superconductors are coupled at the upper end to the upper end of the odd number of superconductors. A plurality of lower shunt coils each coupled to the lower end of each of the even number of superconductors and a plurality of upper shunt coils each coupled to the upper end of each of the odd number of superconductors so as to generate a generally orthoganal uniform magnetic field during quenching using only the magenetic field generated by the superconductors.

  5. Online Monitoring System for Performance Fault Detection

    SciTech Connect (OSTI)

    Gioiosa, Roberto; Kestor, Gokcen; Kerbyson, Darren J.

    2014-05-19

    To achieve the exaFLOPS performance within a contain power budget, next supercomputers will feature hundreds of millions of components operating at low- and near-threshold voltage. As the probability that at least one of these components fails during the execution of an application approaches certainty, it seems unrealistic to expect that any run of a scientific application will not experience some performance faults. We believe that there is need of a new generation of light-weight performance and debugging tools that can be used online even during production runs of parallel applications and that can identify performance anomalies during the application execution. In this work we propose the design and implementation of a monitoring system that continuously inspects the evolution of run

  6. Development of Characterization Technology for Fault Zone Hydrology

    SciTech Connect (OSTI)

    Karasaki, Kenzi; Onishi, Tiemi; Gasperikova, Erika; Goto, Junichi; Tsuchi, Hiroyuki; Miwa, Tadashi; Ueta, Keiichi; Kiho, Kenzo; MIyakawa, Kimio

    2010-08-06

    Several deep trenches were cut, and a number of geophysical surveys were conducted across the Wildcat Fault in the hills east of Berkeley, California. The Wildcat Fault is believed to be a strike-slip fault and a member of the Hayward Fault System, with over 10 km of displacement. So far, three boreholes of ~;; 150m deep have been core-drilled and borehole geophysical logs were conducted. The rocks are extensively sheared and fractured; gouges were observed at several depths and a thick cataclasitic zone was also observed. While confirming some earlier, published conclusions from shallow observations about Wildcat, some unexpected findings were encountered. Preliminary analysis indicates that Wildcat near the field site consists of multiple faults. The hydraulic test data suggest the dual properties of the hydrologic structure of the fault zone. A fourth borehole is planned to penetrate the main fault believed to lie in-between the holes. The main philosophy behind our approach for the hydrologic characterization of such a complex fractured system is to let the system take its own average and monitor a long term behavior instead of collecting a multitude of data at small length and time scales, or at a discrete fracture scale and to ?up-scale,? which is extremely tenuous.

  7. LOCATION USE AGREEMENT DePaul University School of Cinematic Arts

    E-Print Network [OSTI]

    Schaefer, Marcus

    LOCATION USE AGREEMENT DePaul University School of Cinematic Arts This Location Use Agreement controlled by Owner, relating to projects for the students' coursework in DePaul's School of Cinematic Arts

  8. Visualization of stacking faults in fcc crystals in plastic deformations

    E-Print Network [OSTI]

    Takeshi Kawasaki; Akira Onuki

    2011-11-27

    Using molecular dynamics simulation, we investigate the dynamics of stacking faults in fcc crystals in uniaxial stretching in a Lennard-Jones binary mixture composed of 4096 particles in three dimensions. We visualize stacking faults using a disorder variable $D_j(t)$ for each particle $j$ constructed from local bond order parameters based on spherical harmonics (Steinhardt order parameters). Also introducing a method of bond breakage, we examine how stacking faults are formed and removed by collective particle motions. These processes are relevant in plasticity of fcc crystals.

  9. Cluster-based architecture for fault-tolerant quantum computation

    E-Print Network [OSTI]

    Keisuke Fujii; Katsuji Yamamoto

    2009-12-28

    We present a detailed description of an architecture for fault-tolerant quantum computation, which is based on the cluster model of encoded qubits. In this cluster-based architecture, concatenated computation is implemented in a quite different way from the usual circuit-based architecture where physical gates are recursively replaced by logical gates with error-correction gadgets. Instead, some relevant cluster states, say fundamental clusters, are recursively constructed through verification and postselection in advance for the higher-level one-way computation, which namely provides error-precorrection of gate operations. A suitable code such as the Steane seven-qubit code is adopted for transversal operations. This concatenated construction of verified fundamental clusters has a simple transversal structure of logical errors, and achieves a high noise threshold ~ 3 % for computation by using appropriate verification procedures. Since the postselection is localized within each fundamental cluster with the help of deterministic bare controlled-Z gates without verification, divergence of resources is restrained, which reconciles postselection with scalability.

  10. Static Fault Attack on Hardware DES Registers Philippe Loubet-Moundi, Francis Olivier, and David Vigilant

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Static Fault Attack on Hardware DES Registers Philippe Loubet-Moundi, Francis Olivier, and David deals with static faults which lie in between. A static fault modifies a value loaded in a volatile], quickly became a privileged target for DFA. #12;2 Static Fault Attacks on Hardware DES Registers Indeed

  11. Can Fault Prediction Models and Metrics be Used for Vulnerability Prediction? Yonghee Shin and Laurie Williams

    E-Print Network [OSTI]

    Young, R. Michael

    are built with traditional metrics of complexity, code churn, and fault history. We have performed to the code [17]. Hence, complexity metrics and code churn metrics have been used for fault prediction [5, 17 fault prediction metrics ­ complexity, code churn, and fault history metrics for vulnerability

  12. Seismic behaviour of the Dead Sea fault along Araba valley, Y. Klinger,1,

    E-Print Network [OSTI]

    Avouac, Jean-Philippe

    rue Lafayette, F-75480 Paris cedex 10, France 4 Department of Geology, University of Jordan, Amman-lateral strike-slip fault. South of the Dead Sea basin, the Wadi Araba fault extends over 160 km to the Gulf the fault except around the Dead Sea and Gulf of Aqaba, where the fault splays into complex pull-apart basin

  13. Dynamic leakage of faults during differential depletion: Theory, models, and examples from the Niger delta

    SciTech Connect (OSTI)

    Watts, N.L.; Kaars Sijpestein, C.H.; Osai, L.N.; Okoli, O.C. (Shell Petroleum Development Co. of Nigeria, Lagos (Nigeria))

    1991-08-01

    Previous studies of fault sealing have addressed possible fault leakage during secondary migration due to the effects of increased hydrocarbon-water capillary pressure, fracturing, or small-scale incremental fault movements. Of equal importance to production geologists is the failure and leakage of faults during field development due to differential depletion of adjacent fault blocks. This paper examines the unique problems associated with this dynamic leakage of faults. It is theoretically shown that the fault sealing mechanism, and the extent of the seal, directly influences the failure process which in turn results in a variety of favorable and unfavorable effects on field development. The qualitative models give considerable insight into such aspects as oil-column expansion and resaturation losses, interfault block aquifer support (with important implications to material balance calculations), possible leakage or spillage of oil across faults, and potential fault failure during (re)injection projects. Examples of dynamic fault leakage are presented from selected fields of the Niger delta.

  14. An information model for inter-organizational fault Patricia Marcu

    E-Print Network [OSTI]

    in the IT Infrastructure Library (ITIL) [2] and related frameworks in the area of IT service management (ITSM). But since ITIL and the related ITSM frameworks do not consider specific aspects of inter- organizational (fault

  15. Robust model-based fault diagnosis for chemical process systems 

    E-Print Network [OSTI]

    Rajaraman, Srinivasan

    2006-08-16

    Fault detection and diagnosis have gained central importance in the chemical process industries over the past decade. This is due to several reasons, one of them being that copious amount of data is available from a large ...

  16. Thermal Waters Along The Konocti Bay Fault Zone, Lake County...

    Open Energy Info (EERE)

    Thermal Waters Along The Konocti Bay Fault Zone, Lake County, California- A Re-Evaluation Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article:...

  17. Microgrid Fault Protection Based on Symmetrical and Differential Current Components

    E-Print Network [OSTI]

    Microgrid Fault Protection Based on Symmetrical and Differential Current Components Prepared.........................................................................................8 2. AEP CERTS MICROGRID .........................................................................9 ........................................................................67 #12;3 Index of Figures Figure 1: Schematic representation of the AEP CERTS microgrid

  18. Compatible and Cost-Effective Fault Diagnostic Solutions for...

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

    Compatible and Cost-Effective Fault Diagnostic Solutions for Air Handling Unit-Variable Air Volume and Air Handling Unit-Constant Air Volume Systems - 2014 BTO Peer Review...

  19. COMPLETE FAULT ANALYSIS FOR LONG TRANSMISSION LINE USING

    E-Print Network [OSTI]

    sys- tem based approach is described in (Girgis and Johns, 1996) and a phasor measurement unit (PMU Measurement Unit (PMU) are further developed. Previous efforts were aimed at implementing accu- rate fault

  20. Fault Mechanics Earth Structure (2nd Edition), 2004

    E-Print Network [OSTI]

    , and normal faulting is ratio of pore-fluid pressure and lithostatic pressure ( ranges from 0.4 for hydrostatic fluid pressure to 1 for lithostatic fluid pressure) © EarthStructure (2nd ed) 610/25/2010 #12

  1. MODELING AND SIMULATION OF HVAC FAULTS IN ENERGYPLUS

    E-Print Network [OSTI]

    Basarkar, Mangesh

    2013-01-01

    http://www.eia.doe.gov/emeu/cbecs/ EnergyPlus. 2011, http://of HVAC Results in EnergyPlus Mangesh Basarkar, XiufengOF HVAC FAULTS IN ENERGYPLUS Mangesh Basarkar, Xiufeng Pang,

  2. A Low Overhead Fault Tolerant Coherence Protocol for CMP Architectures

    E-Print Network [OSTI]

    Acacio, Manuel

    A Low Overhead Fault Tolerant Coherence Protocol for CMP Architectures Ricardo Fern Murcia SPAIN {r.fernandez,jmgarcia,meacacio}@ditec.um.es Jos´e Duato Dpto. Inform´atica de Sistemas y

  3. Motion and evolution of the Chaochou Fault, Southern Taiwan 

    E-Print Network [OSTI]

    Hassler, Lauren E.

    2005-11-01

    The Chaochou Fault (CCF) is both an important lithologic boundary and a significant topographic feature in the Taiwan orogenic belt. It is the geologic boundary between the Slate Belt to the east, and the Western Foothills to the west. Although...

  4. Recent earthquake sequences at Coso: Evidence for conjugate faulting...

    Open Energy Info (EERE)

    Recent earthquake sequences at Coso: Evidence for conjugate faulting and stress loading near a geothermal field Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  5. Understanding Fault Characteristics And Sediment Depth For Geothermal...

    Open Energy Info (EERE)

    of primarily E-W directed extension along N-NNW striking normal faults. Water well drilling on the eastern slopes of the Wassuk Range, west of the city of Hawthorne, Nevada...

  6. Fault Block Kinematics at a Releasing Stepover of the Eastern...

    Open Energy Info (EERE)

    Nascent Metamorphic Core Complex Citation Christopher J. Pluhar,Robert S. Coe,Jonathan C. Lewis,Francis C. Monastero,Jonathan M.G. Glen. 2006. Fault Block Kinematics at a Releasing...

  7. Non-intrusive fault detection in reciprocating compressors

    E-Print Network [OSTI]

    Schantz, Christopher James

    2011-01-01

    This thesis presents a set of techniques for non-intrusive sensing and fault detection in reciprocating compressors driven by induction motors. The procedures developed here are "non-intrusive" because they rely only on ...

  8. Fusing strategies for the dual-voltage fault

    E-Print Network [OSTI]

    Shrivastava, Rupam, 1981-

    2005-01-01

    This thesis focuses on the 42V - 14V fault in a dual voltage system and discusses the possibility of effective fusing. A simple model for the system had been created from technical documentation. Based on the model and the ...

  9. Fault-Tolerant Quantum Computation with Higher-Dimensional Systems

    E-Print Network [OSTI]

    Daniel Gottesman

    1998-02-02

    Instead of a quantum computer where the fundamental units are 2-dimensional qubits, we can consider a quantum computer made up of d-dimensional systems. There is a straightforward generalization of the class of stabilizer codes to d-dimensional systems, and I will discuss the theory of fault-tolerant computation using such codes. I prove that universal fault-tolerant computation is possible with any higher-dimensional stabilizer code for prime d.

  10. Microstructures and Rheology of a Limestone-Shale Thrust Fault 

    E-Print Network [OSTI]

    Wells, Rachel Kristen

    2011-02-22

    AND RHEOLOGY OF A LIMESTONE-SHALE THRUST FAULT A Thesis by RACHEL KRISTEN WELLS 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 December... 2010 Major Subject: Geology MICROSTRUCTURES AND RHEOLOGY OF A LIMESTONE-SHALE THRUST FAULT A Thesis by RACHEL KRISTEN WELLS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

  11. Fault Detection, Diagnostics and Optimmization using BIG Data Analytics 

    E-Print Network [OSTI]

    Bonifay, X.

    2013-01-01

    buildings. Reduce footprint. ESL-IC-13-10-58a Proceedings of the 13th International Conference for Enhanced Building Operations, Montreal, Quebec, October 8-11, 2013 About IFCS ? Headquartered in Quebec, CANADA ? Founded in 1993 ? Y-Y Growth..., Equipment longevity, Occupant comfort ESL-IC-13-10-58a Proceedings of the 13th International Conference for Enhanced Building Operations, Montreal, Quebec, October 8-11, 2013 Fault Detection and Diagnostics - FDD Fault detection and diagnostics (FDD...

  12. Neural net application to transmission line fault detection and classification 

    E-Print Network [OSTI]

    Rikalo, Igor

    1994-01-01

    . So far, several NN implementations for various fault diagnosis problems have been reported in the literature. A number of papers describing NN applications in pov er systems categorized in appropriate groups can be found in [19, 20]. 1. 3. Thesis... important issue for stable and reliable operation of pov;er systems. The main target of the fault analysis are circuit breaker and protection relay operations. The task of the analysis is to reach a conclusion about the current state of the electrical...

  13. Power line fault current coupling to nearby natural gas pipelines: Volume 3, Analysis of pipeline coating impedance: Final report

    SciTech Connect (OSTI)

    Dabkowski, J.; Frazier, M. J.

    1988-08-01

    This report is a compilation of results obtained from two research programs. The response of a pipeline and coating at the higher voltage excitation levels encountered under power line fault conditions appears to be dominated by conduction at holiday sites in the coating. A simple analytical model was developed for predicting the resistance of a pipeline coating holiday as a function of the voltage produced across the pipeline coating by a nearby faulted power transmission line. The model was initially validated using coated pipeline samples stressed by a capacitive discharge voltage. Additional validation tests were then performed at the Pacific Gas and Electric Company's High Voltage Engineering Research Facility using high voltage ac waveforms for fault simulation. The principle program objective was to develop, both by laboratory and controlled field testing, an electrical resistance characterization for the pipeline coating as a function of the applied voltage level. The development of this model will allow a more accurate prediction of coupled voltage levels to a pipeline during fault current conditions. 54 figs, 3 tabs.

  14. Study on Commissioning Process for Control Logic of Thermal Storage System 

    E-Print Network [OSTI]

    Shioya, M.; Tsubaki, M.; Nakahara, N.

    2004-01-01

    and measurements of the control output, the CLT can detect faults relating to operation. The present paper reports the result of commissioning of a heat exchanger secondary control in a thermal storage system in an actual building using the CLT....

  15. WORKPLACE HAZARD ASSESSMENT Location: Task

    E-Print Network [OSTI]

    Rubloff, Gary W.

    WORKPLACE HAZARD ASSESSMENT Location: Task: Performed by: Date: This form may be used as an aid in performing hazard assessment. Review listed hazard classifications, identify all hazards, possible hazards and their sources. Hazard classification listing is not intended to be complete but is provided as a guide

  16. Off-fault Damage Associated with a Localized Bend in the North Branch San Gabriel Fault, California 

    E-Print Network [OSTI]

    Becker, Andrew 1987-

    2012-08-15

    , such as bends and steps, are thought to affect earthquake rupture propagation and energy radiation, but the effects are not completely understood. We hypothesize that the rate of accumulation of new damage decreases as fault maturity increases, and damage...

  17. Development and implementation of an artificially intelligent search algorithm for sensor fault detection using neural networks 

    E-Print Network [OSTI]

    Singh, Harkirat

    2004-09-30

    This work is aimed towards the development of an artificially intelligent search algorithm used in conjunction with an Auto Associative Neural Network (AANN) to help locate and reconstruct faulty sensor inputs in control ...

  18. Efficient Detection on Stochastic Faults in PLC Based Automated Assembly Systems With Novel Sensor Deployment and Diagnoser Design 

    E-Print Network [OSTI]

    Wu, Zhenhua

    2012-07-16

    Directed Graph SDG Signed Directed Graph GA Genetic Algorithm SA Simulated Annealing TS Tabu Search IP Integer Programming DP Dynamic Programming MINLP Mixed Integer Nonlinear Programming FMEA Failure Mode Effect Analysis AHP Analytical Hierarchy... and target multiple objectives; 2) design a Petri net (PN) diagnoser for detecting stochastic faults in realtime; and 3) evaluate the proposed sensor deployment and diagnoser in a PLC controlled manufacturing system. FMEA Sensor Deployment Model...

  19. STRUCTURAL CONTROL AND HEALTH MONITORING Struct. Control Health Monit. 2006; 13:571572

    E-Print Network [OSTI]

    Nagarajaiah, Satish

    Structural Control Benchmark Problem: Smart Base Isolated Building subjected to Near Fault Earthquakes Many smart base-isolated building benchmark problem, specifically on phase I sample controllers for linear focusing on response control of seismic and wind-excited buildings, and seismically excited long- span

  20. Marine and Land ActiveSource Seismic Imaging of midMiocene to Holoceneaged Faulting near Geothermal Prospects at Pyramid Lake, Nevada

    E-Print Network [OSTI]

    controls on geothermal systems and extensional regimes favor dilatational normal fault systems, which Geothermal Prospects at Pyramid Lake, Nevada Amy Eisses1,3, Annie Kell1,3, Graham Kent1,3, Neal Driscoll2 figure 1), a kinematically linked, en echelon system of leftstepping, dextral northwest striking

  1. Electrical and thermal finite element modeling of arc faults in photovoltaic bypass diodes.

    SciTech Connect (OSTI)

    Bower, Ward Isaac; Quintana, Michael A.; Johnson, Jay

    2012-01-01

    Arc faults in photovoltaic (PV) modules have caused multiple rooftop fires. The arc generates a high-temperature plasma that ignites surrounding materials and subsequently spreads the fire to the building structure. While there are many possible locations in PV systems and PV modules where arcs could initiate, bypass diodes have been suspected of triggering arc faults in some modules. In order to understand the electrical and thermal phenomena associated with these events, a finite element model of a busbar and diode was created. Thermoelectrical simulations found Joule and internal diode heating from normal operation would not normally cause bypass diode or solder failures. However, if corrosion increased the contact resistance in the solder connection between the busbar and the diode leads, enough voltage potentially would be established to arc across micron-scale electrode gaps. Lastly, an analytical arc radiation model based on observed data was employed to predicted polymer ignition times. The model predicted polymer materials in the adjacent area of the diode and junction box ignite in less than 0.1 seconds.

  2. Joint microseismic event location with uncertain velocity

    E-Print Network [OSTI]

    Poliannikov, Oleg V.

    2013-01-01

    We study the problem of the joint location of seismic events using an array of receivers. We show that locating multiple seismic events simultaneously is advantageous compared to the more traditional approaches of locating ...

  3. Location and Hours | ornl.gov

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

    Location and Hours Location The ORNL Research Library is located off the central corridor of Bldg. 4500N on the main ORNL campus. Hours The library is open 24 hours, seven days a...

  4. Fault Oblivious eXascale Whitepaper

    SciTech Connect (OSTI)

    Minnich, Ronald G.; Janssen, Curtis L.; Krishnamoorthy, Sriram; Marquez, Andres; Gokhale, Maya; Sadayappan, Ponnuswamy; Van Hensbergen, Eric; McKie, Jim; Appavoo, Jonathan

    2011-06-01

    In this paper we present a software system which supports dynamic, irregular, adaptive applications. Data objects are created and structured in a hierarchical manner, with replication as needed to provide a high degree of redundancy. The data objects can contain data, code, tasks (work descriptors with references to data, code, and other tasks) and higher level structures such as work queues. The higher level structures benefit from the properties of the data objects: redundant storage to support resiliency in the face of hardware failure; hierarchical structure to optimize use of the HPC system; and a presence of object names, available in the per-user file system name space, which allows any application, not just specially written HPC applications, to make use of the data even while it is on the HPC system. Our use of hierarchy will make the runtime scalable to very large systems. Our use of redundancy will allow programs to be written in a fault-oblivious manner, eliminating the need for system-level checkpointing. Putting data object names into the file system name space allows for interactive use of the system by users. With this approach, we will be able to finally leave the batch era behind, a half-century after the invention of time sharing. We will be able to stop bounding program through- put by the checkpoint interval. Application data will be accessible at any time, not hidden behind opaque 128-bit pointers or MPI ranks, but given a name that is visible everywhere. Programmers can stop laying out data, and thinking about where the data is, and the code is, and the nodes are, and stick with the problem of what the application is supposed to be doing. This work, if it succeeds, will enable scientific computing to scale to the next generation of machines.

  5. Energy Department Launches Alternative Fueling Station Locator...

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

    Launches Alternative Fueling Station Locator App Energy Department Launches Alternative Fueling Station Locator App November 7, 2013 - 11:16am Addthis As part of the Obama...

  6. Topographic and Air-Photo Lineaments in Various Locations Related to Geothermal Exploration in Colorado

    SciTech Connect (OSTI)

    Zehner, Richard

    2012-02-01

    Title: Topographic and Air-Photo Lineaments in Various Locations Related to Geothermal Exploration in Colorado Tags: Colorado, lineaments, air-photo, geothermal Summary: These line shapefiles trace apparent topographic and air-photo lineaments in various counties in Colorado. It was made in order to identify possible fault and fracture systems that might be conduits for geothermal fluids, as part of a DOE reconnaissance geothermal exploration program. Description: Geothermal fluids commonly utilize fault and fractures in competent rocks as conduits for fluid flow. Geothermal exploration involves finding areas of high near-surface temperature gradients, along with a suitable “plumbing system” that can provide the necessary permeability. Geothermal power plants can sometimes be built where temperature and flow rates are high. This line shapefile is an attempt to use desktop GIS to delineate possible faults and fracture orientations and locations in highly prospective areas prior to an initial site visit. Geochemical sampling and geologic mapping could then be centered around these possible faults and fractures. To do this, georeferenced topographic maps and aerial photographs were utilized in an existing GIS, using ESRI ArcMap 10.0 software. The USA_Topo_Maps and World_Imagery map layers were chosen from the GIS Server at server.arcgisonline.com, using a UTM Zone 13 NAD27 projection. This line shapefile was then constructed over that which appeared to be through-going structural lineaments in both the aerial photographs and topographic layers, taking care to avoid manmade features such as roads, fence lines, and utility right-of-ways. Still, it is unknown what actual features these lineaments, if they exist, represent. Although the shapefiles are arranged by county, not all areas within any county have been examined for lineaments. Work was focused on either satellite thermal infrared anomalies, known hot springs or wells, or other evidence of geothermal systems. Finally, lineaments may be displaced somewhat from their actual location, due to such factors as shadow effects with low sun angles in the aerial photographs. Projection Information: UTM Zone 13 NAD 27 projection Credits: These lineament shapefile was created by Geothermal Development Associates, as part of a geothermal geologic reconnaissance performed by Flint Geothermal, LLC, of Denver Colorado. Funding was provided in part by DOE Grant DE-EEE0002828. Use Limitation These shapefiles was constructed as an aid to geothermal exploration in preparation for a site visit for field checking. We make no claims as to the existence of the lineaments, their location, orientation, and/or nature.

  7. Ombuds Office Location & Hours

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesseworkSURVEY UNIVERSEHowScientificOmbuds Office Location & Hours Ombuds

  8. Location Independent Professional Project: A Pilot Study

    SciTech Connect (OSTI)

    Hudson, J.A.; Long, J.P.; Miller, M.M.

    1999-02-01

    This pilot study project explored the problem of providing access to the nomadic worker who desires to connect a computer through network access points at a number of different locations within the SNL/NM campus as well as outside the campus. The design and prototype development gathered knowledge that may allow a design to be developed that could be extended to a larger number of SNL/NM network drop boxes. The focus was to provide a capability for a worker to access the SNL IRN from a network drop box (e.g. in a conference room) as easily as when accessing the computer network from the office normally used by the worker. Additional study was done on new methods to authenticate the off campus worker, and protect and control access to data.

  9. Final Technical Report Recovery Act: Online Nonintrusive Condition Monitoring and Fault Detection for Wind Turbines

    SciTech Connect (OSTI)

    Wei Qiao

    2012-05-29

    The penetration of wind power has increased greatly over the last decade in the United States and across the world. The U.S. wind power industry installed 1,118 MW of new capacity in the first quarter of 2011 alone and entered the second quarter with another 5,600 MW under construction. By 2030, wind energy is expected to provide 20% of the U.S. electricity needs. As the number of wind turbines continues to grow, the need for effective condition monitoring and fault detection (CMFD) systems becomes increasingly important [3]. Online CMFD is an effective means of not only improving the reliability, capacity factor, and lifetime, but it also reduces the downtime, energy loss, and operation and maintenance (O&M) of wind turbines. The goal of this project is to develop novel online nonintrusive CMFD technologies for wind turbines. The proposed technologies use only the current measurements that have been used by the control and protection system of a wind turbine generator (WTG); no additional sensors or data acquisition devices are needed. Current signals are reliable and easily accessible from the ground without intruding on the wind turbine generators (WTGs) that are situated on high towers and installed in remote areas. Therefore, current-based CMFD techniques have great economic benefits and the potential to be adopted by the wind energy industry. Specifically, the following objectives and results have been achieved in this project: (1) Analyzed the effects of faults in a WTG on the generator currents of the WTG operating at variable rotating speed conditions from the perspective of amplitude and frequency modulations of the current measurements; (2) Developed effective amplitude and frequency demodulation methods for appropriate signal conditioning of the current measurements to improve the accuracy and reliability of wind turbine CMFD; (3) Developed a 1P-invariant power spectrum density (PSD) method for effective signature extraction of wind turbine faults with characteristic frequencies in the current or current demodulated signals, where 1P stands for the shaft rotating frequency of a WTG; (4) Developed a wavelet filter for effective signature extraction of wind turbine faults without characteristic frequencies in the current or current demodulated signals; (5) Developed an effective adaptive noise cancellation method as an alternative to the wavelet filter method for signature extraction of wind turbine faults without characteristic frequencies in the current or current demodulated signals; (6) Developed a statistical analysis-based impulse detection method for effective fault signature extraction and evaluation of WTGs based on the 1P-invariant PSD of the current or current demodulated signals; (7) Validated the proposed current-based wind turbine CMFD technologies through extensive computer simulations and experiments for small direct-drive WTGs without gearboxes; and (8) Showed, through extensive experiments for small direct-drive WTGs, that the performance of the proposed current-based wind turbine CMFD technologies is comparable to traditional vibration-based methods. The proposed technologies have been successfully applied for detection of major failures in blades, shafts, bearings, and generators of small direct-drive WTGs. The proposed technologies can be easily integrated into existing wind turbine control, protection, and monitoring systems and can be implemented remotely from the wind turbines being monitored. The proposed technologies provide an alternative to vibration-sensor-based CMFD. This will reduce the cost and hardware complexity of wind turbine CMFD systems. The proposed technologies can also be combined with vibration-sensor-based methods to improve the accuracy and reliability of wind turbine CMFD systems. When there are problems with sensors, the proposed technologies will ensure proper CMFD for the wind turbines, including their sensing systems. In conclusion, the proposed technologies offer an effective means to achieve condition-based smart maintenance for wind turbines and have a gre

  10. Numerical modeling of gas migration into and through faulted sand reservoirs in Pabst Field (Main Pass East Block 259), northern Gulf of Mexico 

    E-Print Network [OSTI]

    Li, Yuqian

    2006-08-16

    allow gas communication among the sands. Meanwhile, three fault families break up the three sands into numerous compartments. A primary fault and large synthetic and antithetic faults act as gas migration pathways: the synthetic and antithetic faults...

  11. Impact of Installation Faults on Heat Pump Performance

    SciTech Connect (OSTI)

    Hourahan, Mr. Glenn [Air Conditioning Contractors of America, Arlington, VA; Baxter, Van D [ORNL

    2015-01-01

    Numerous studies and surveys indicate that typically-installed HVAC equipment operate inefficiently and waste considerable energy due to varied installation errors (faults) such as improper refrigerant charge, incorrect airflow, oversized equipment, and leaky ducts. This article summarizes the results of a large United States (U.S.) experimental/analytical study (U.S. contribution to IEA HPP Annex 36) of the impact that different faults have on the performance of an air-source heat pump (ASHP) in a typical U.S. single-family house. It combines building effects, equipment effects, and climate effects in an evaluation of the faults impact on seasonal energy consumption through simulations of the house/ASHP pump system.

  12. Short range radio locator system

    DOE Patents [OSTI]

    McEwan, T.E.

    1996-12-31

    A radio location system comprises a wireless transmitter that outputs two megahertz period bursts of two gigahertz radar carrier signals. A receiver system determines the position of the transmitter by the relative arrival of the radar bursts at several component receivers set up to have a favorable geometry and each one having a known location. One receiver provides a synchronizing gating pulse to itself and all the other receivers. The rate of the synchronizing gating pulse is slightly offset from the rate of the radar bursts themselves, so that each sample collects one finely-detailed piece of information about the time-of-flight of the radar pulse to each receiver each pulse period. Thousands of sequential pulse periods provide corresponding thousand of pieces of information about the time-of-flight of the radar pulse to each receiver, in expanded, not real time. Therefore the signal processing can be done with relatively low-frequency, inexpensive components. A conventional microcomputer is then used to find the position of the transmitter by geometric triangulation based on the relative time-of-flight information. 5 figs.

  13. Short range radio locator system

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1996-01-01

    A radio location system comprises a wireless transmitter that outputs two megahertz period bursts of two gigahertz radar carrier signals. A receiver system determines the position of the transmitter by the relative arrival of the radar bursts at several component receivers set up to have a favorable geometry and each one having a known location. One receiver provides a synchronizing gating pulse to itself and all the other receivers to sample the ether for the radar pulse. The rate of the synchronizing gating pulse is slightly offset from the rate of the radar bursts themselves, so that each sample collects one finely-detailed piece of information about the time-of-flight of the radar pulse to each receiver each pulse period. Thousands of sequential pulse periods provide corresponding thousand of pieces of information about the time-of-flight of the radar pulse to each receiver, in expanded, not real time. Therefore the signal processing can be done with relatively low-frequency, inexpensive components. A conventional microcomputer is then used to find the position of the transmitter by geometric triangulation based on the relative time-of-flight information.

  14. Multi-fault Tolerance for Cartesian Data Distributions

    SciTech Connect (OSTI)

    Ali, Nawab; Krishnamoorthy, Sriram; Halappanavar, Mahantesh; Daily, Jeffrey A.

    2013-06-01

    Faults are expected to play an increasingly important role in how algorithms and applications are designed to run on future extreme-scale sys- tems. Algorithm-based fault tolerance (ABFT) is a promising approach that involves modications to the algorithm to recover from faults with lower over- heads than replicated storage and a signicant reduction in lost work compared to checkpoint-restart techniques. Fault-tolerant linear algebra (FTLA) algo- rithms employ additional processors that store parities along the dimensions of a matrix to tolerate multiple, simultaneous faults. Existing approaches as- sume regular data distributions (blocked or block-cyclic) with the failures of each data block being independent. To match the characteristics of failures on parallel computers, we extend these approaches to mapping parity blocks in several important ways. First, we handle parity computation for generalized Cartesian data distributions with each processor holding arbitrary subsets of blocks in a Cartesian-distributed array. Second, techniques to handle corre- lated failures, i.e., multiple processors that can be expected to fail together, are presented. Third, we handle the colocation of parity blocks with the data blocks and do not require them to be on additional processors. Several al- ternative approaches, based on graph matching, are presented that attempt to balance the memory overhead on processors while guaranteeing the same fault tolerance properties as existing approaches that assume independent fail- ures on regular blocked data distributions. The evaluation of these algorithms demonstrates that the additional desirable properties are provided by the pro- posed approach with minimal overhead.

  15. Sedimentation Rates Test Models of Oceanic Detachment Faulting

    E-Print Network [OSTI]

    Parnell-Turner, Ross; Cann, Johnson R.; Smith, Deborah K.; Schouten, Hans; Yoerger, Dana; Palmiotto, Camilla; Zheleznov, Alexei; Bai, Hailong

    2014-10-23

    .R., Tolstoy, M., Dziak, R.P., Fox, C.G. & Smith, D.K., 2002. Aftershock 286 sequences in the mid-ocean ridge environment: an analysis using hydroacoustic data. 287 Tectonophysics, 354(1-2), 49–70. 288 Buck, W. R., 1988. Flexural Rotation of Normal Faults... Dick, H.J.B., Smith, D.K., Cann, J.R., Schouten, H., Marschall, H., Parnell-Turner, R.E. 313 & Yoerger, D., 2013. Crustal Heterogeneity and Stratigraphy on the Mid-Atlantic 314 PARNELL-TURNER ET AL.: SEDIMENTATION AND DETACHMENT FAULTS 16...

  16. Interseismic strain accumulation and the earthquake potential on the southern San Andreas fault system

    E-Print Network [OSTI]

    Fialko, Y

    2006-01-01

    lat- ter would imply subsidence to the east of the fault.indicate uplift, rather subsidence, to the east of the faultlikely involves ground subsidence to the west of the fault.

  17. A Survey of NASA and Military Standards on Fault Tolerance and Reliability Applied to Robotics

    E-Print Network [OSTI]

    Rice University - Center for Cooperative Autonomous Robots for Hazardous Environments

    A Survey of NASA and Military Standards on Fault Tolerance and Reliability Applied to Robotics of relevant Military and NASA standards for reliability and fault toler­ ance is included. 1 Introduction

  18. The dynamics of oceanic transform faults : constraints from geophysical, geochemical, and geodynamical modeling

    E-Print Network [OSTI]

    Gregg, Patricia Michelle Marie

    2008-01-01

    Segmentation and crustal accretion at oceanic transform fault systems are investigated through a combination of geophysical data analysis and geodynamical and geochemical modeling. Chapter 1 examines the effect of fault ...

  19. A methodology for experimentally verifying simulation models for distribution transformer internal faults 

    E-Print Network [OSTI]

    Palmer-Buckle, Peter

    1999-01-01

    Internal winding faults comprise 70-80% of modem transformer breakdown. In this era of deregulation, this phenomenon is likely to increase since loading transformers to their optimum capacity is becoming normal practice. These internal faults result...

  20. Simulation and Validation of Vapor Compression System Faults and Start-up/Shut-down Transients 

    E-Print Network [OSTI]

    Ayyagari, Balakrishna

    2012-10-19

    as vapor compression system faults. This thesis addresses these concerns and enhances the existing modeling library to capture the transients related to the above mentioned conditions. In this thesis, the various faults occurring in a vapor compressor...

  1. Observations on Faults and Associated Permeability Structures in Hydrogeologic Units at the Nevada Test Site

    SciTech Connect (OSTI)

    Prothro, Lance B.; Drellack, Sigmund L.; Haugstad, Dawn N.; Huckins-Gang, Heather E.; Townsend, Margaret J.

    2009-03-30

    Observational data on Nevada Test Site (NTS) faults were gathered from a variety of sources, including surface and tunnel exposures, core samples, geophysical logs, and down-hole cameras. These data show that NTS fault characteristics and fault zone permeability structures are similar to those of faults studied in other regions. Faults at the NTS form complex and heterogeneous fault zones with flow properties that vary in both space and time. Flow property variability within fault zones can be broken down into four major components that allow for the development of a simplified, first approximation model of NTS fault zones. This conceptual model can be used as a general guide during development and evaluation of groundwater flow and contaminate transport models at the NTS.

  2. Comparative analysis of electrical and mechanical fault signatures in induction motors 

    E-Print Network [OSTI]

    Venugopal, Arvind Madabushi

    2005-02-17

    This research deals with the comparison of fault signatures in induction motors. The primary objective is to study and analyze the similarities in the electrical and mechanical fault signatures, and to determine the ...

  3. Fault Current Issues for Market Driven Power Systems with Distributed Generation

    E-Print Network [OSTI]

    1 Fault Current Issues for Market Driven Power Systems with Distributed Generation Natthaphob of installing distributed generation (DG) to electric power systems. The proliferation of new generators creates Terms--Distributed / dispersed generation, power distri- bution, power system protection, fault

  4. ADECENTRALIZED APPROACH TOWARDS AUTONOMOUS FAULT DETECTION IN WIRELESS STRUCTURAL HEALTH MONITORING SYSTEMS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ADECENTRALIZED APPROACH TOWARDS AUTONOMOUS FAULT DETECTION IN WIRELESS STRUCTURAL HEALTH MONITORING structural health monitoring (SHM) systems may reduce the monitoring quality and, if remaining undetected : Autonomous fault detection, structural health monitoring, wireless sensor networks, smart sensors, analytical

  5. The structure and evolution of small-displacement strike-slip faults in porous sandstone 

    E-Print Network [OSTI]

    Schafer, Kirk Wyatt

    2002-01-01

    The early-evolution of fault structure is inferred from analysis of detailed maps of portions of strike-slip faults with uniform displacements ranging from mm to decimeter in porous quartzose sandstone. Emphasis is on ...

  6. Fault tree analysis of commonly occurring medication errors and methods to reduce them 

    E-Print Network [OSTI]

    Cherian, Sandhya Mary

    1994-01-01

    -depth analysis of over two hundred actual medication error incidents. These errors were then classified according to type, in an attempt at deriving a generalized fault tree for the medication delivery system that contributed to errors. This generalized fault...

  7. Initiation propagation and termination of elastodynamic ruptures associated with segmentation of faults and shaking

    E-Print Network [OSTI]

    Shaw, Bruce E.

    Initiation propagation and termination of elastodynamic ruptures associated with segmentation the initiation, propagation, and termination of ruptures and their relationship to fault geometry and shaking of terminations near fault ends; and persistent propagation directivity effects. Taking advantage of long

  8. Dynamical System Analysis and Forecasting of Deformation Produced by an Earthquake Fault

    E-Print Network [OSTI]

    Ben-Zion, Yehuda

    is characterized by a set of parameters that describe the dynamics, rheology, property disorder, and fault geometry of an earthquake fault is not feasible at present because the governing physical laws, geometric and structural

  9. Finite element analysis of elastic interaction of two en echelon overlapping faults 

    E-Print Network [OSTI]

    Leem, Junghun

    1995-01-01

    on the faults. Attention is focuses on the role of variable fault spacing and overlap for constant far-field compressive principal stresses. The linear elastic, isotropic, plane strain, finite element analyses are obtained. The basic modeling approach...

  10. Microfracture fabric of the Punchbowl fault zone, San Andreas System, California 

    E-Print Network [OSTI]

    Wilson, Jennifer Elizabeth

    1999-01-01

    Andreas system. Open, healed, and sealed microfractures were analyzed with respect to density and orientation as a function of distance from the fault. Microfracture density decreases with distance from the fault core to background levels at approximately...

  11. Power system fault analysis based on intelligent techniques and intelligent electronic device data 

    E-Print Network [OSTI]

    Luo, Xu

    2007-09-17

    This dissertation has focused on automated power system fault analysis. New contributions to fault section estimation, protection system performance evaluation and power system/protection system interactive simulation have ...

  12. Formal Modelling and Analysis of Business Information Applications with Fault Tolerant Middleware

    E-Print Network [OSTI]

    Southampton, University of

    COMPUTING SCIENCE Formal Modelling and Analysis of Business Information Applications with Fault to prove properties of models of business protocols and expose weaknesses of certain middleware.. Formal Modelling and Analysis of Business Information Applications with Fault Tolerant Middleware [By] J

  13. On strong fault tolerance (or strong Menger-connectivity) of multicomputer networks 

    E-Print Network [OSTI]

    Oh, Eunseuk

    2004-11-15

    As the size of networks increases continuously, dealing with networks with faulty nodes becomes unavoidable. In this dissertation, we introduce a new measure for network fault tolerance, the strong fault tolerance (or ...

  14. Close range fault tolerant noncontacting position sensor

    DOE Patents [OSTI]

    Bingham, Dennis N. (Idaho Falls, ID); Anderson, Allen A. (Shelley, ID)

    1996-01-01

    A method and system for locating the three dimensional coordinates of a moving or stationary object in real time. The three dimensional coordinates of an object in half space or full space are determined based upon the time of arrival or phase of the wave front measured by a plurality of receiver elements and an established vector magnitudes proportional to the measured time of arrival or phase at each receiver element. The coordinates of the object are calculated by solving a matrix equation or a set of closed form algebraic equations.

  15. Close range fault tolerant noncontacting position sensor

    DOE Patents [OSTI]

    Bingham, D.N.; Anderson, A.A.

    1996-02-20

    A method and system are disclosed for locating the three dimensional coordinates of a moving or stationary object in real time. The three dimensional coordinates of an object in half space or full space are determined based upon the time of arrival or phase of the wave front measured by a plurality of receiver elements and an established vector magnitudes proportional to the measured time of arrival or phase at each receiver element. The coordinates of the object are calculated by solving a matrix equation or a set of closed form algebraic equations. 3 figs.

  16. Multi-node Coordinated Jamming for Location Privacy Protection

    E-Print Network [OSTI]

    Gruteser, Marco

    precisely locate the target nodes. Although basic anti-localization techniques based on power control's localization systems. However, such a jamming technique has the problem of interfering with the communication such interference problems, those techniques generally induce co- ordination problems or require encryption

  17. A Methodology and Tool Support for the Design and Evaluation of Fault Tolerant, Distributed Embedded Systems

    E-Print Network [OSTI]

    McKelvin, Jr., Mark Lee

    2011-01-01

    Complexity of Embedded Systems . . . . . . . . . . . . . . .Fault Tolerant Design of Distributed Embedded Systems DesignMethodologies for Embedded Systems . . . . . . . . . . . .

  18. Project EARTH-13-SHELLJC1: Polygonal faults and de-watering of mudrocks during early burial

    E-Print Network [OSTI]

    Henderson, Gideon

    Geology. 28, 1593-1610. Goulty, N.J. 2008. Geomechanics of polygonal fault systems: a review. Petroleum

  19. Design to Achieve Fault Tolerance and Resilience

    SciTech Connect (OSTI)

    Ted Quinn; Richard Bockhorst; Craig Peterson; Gregg Swindlehurst

    2012-09-01

    The purpose of this report is to provide initial scoping for follow on work designed to improve nuclear plant operation. The focus of this report is twofold. Selected trips over the last five years are examined to determine if there are potential opportunities to automate tasks that are currently performed manually. The second area is to evaluate the potential for avoiding reactor trips by reducing power in a controlled manner upon the loss of turbine generator load. Some candidate opportunities to reduce the frequency on reactor trips identified in this report are redundant feedwater controls, automated response to a feedwater or condensate pump trip reducing power vice a reactor trip, and elimination of air operators for the feedwater control valves or providing redundant air supplies.

  20. An Empirical Study on Testing and Fault Tolerance for Software Reliability Engineering

    E-Print Network [OSTI]

    Lyu, Michael R.

    An Empirical Study on Testing and Fault Tolerance for Software Reliability Engineering Michael R University of Hong Kong {lyu, zbhuang, samsze, xcai}@cse.cuhk.edu.hk Abstract Software testing and software the effectiveness of software testing and software fault tolerance, mutants were created by injecting real faults

  1. Oil and Gas CDT Bots in Rocks: Intelligent Rock Deformation for Fault Rock

    E-Print Network [OSTI]

    Henderson, Gideon

    Heriot-Watt University, Institute of Petroleum Engineering Supervisory Team · Dr Helen Lewis, Heriot://www.pet.hw.ac.uk/staff-directory/jimsomerville.htm Key Words Nano/Micro sensors; faults; fault zones; geomechanics; rock mechanics; rock deformation-deformed equivalent, a different lab-deformed example and a geomechanical simulation of a fault zone showing permanent

  2. Detection and extraction of fault surfaces in 3D seismic data Israel Cohen1

    E-Print Network [OSTI]

    Cohen, Israel

    for seismic interpretation. INTRODUCTION Fault surfaces are common subterranean structures that are asso that are unrelated to faults. Furthermore, creating a consistent geological interpretation from large 3D-seismicDetection and extraction of fault surfaces in 3D seismic data Israel Cohen1 , Nicholas Coult2

  3. Measuring radon flux across active faults: Relevance of excavating and possibility of satellite discharges

    E-Print Network [OSTI]

    Klinger, Yann

    Measuring radon flux across active faults: Relevance of excavating and possibility of satellite January 2010 Keywords: Exhalation flux Radon-222 Carbon dioxide Faults Earthquake Trench a b s t r a c on the Xidatan segment of the Kunlun Fault, Qinghai Province, China, using measurement of the radon- 222

  4. Resistive Bridge Fault Model Evolution From Conventional to Ultra Deep Submicron Technologies

    E-Print Network [OSTI]

    Polian, Ilia

    Resistive Bridge Fault Model Evolution From Conventional to Ultra Deep Submicron Technologies Ilia three resistive bridging fault models valid for dif- ferent CMOS technologies. The models. The second model is obtained by fitting SPICE data. The third resistive bridging fault model uses Berkeley

  5. Are stress distributions along faults the signature of asperity squeeze? J. Schmittbuhl,1

    E-Print Network [OSTI]

    Schmittbuhl, Jean

    Are stress distributions along faults the signature of asperity squeeze? J. Schmittbuhl,1 G of the stress field along faults and test our model in the case of the Nojima fault, Japan where unique estimates of the absolute stress field have been obtained. The model consists of two parts: an up

  6. Recommendations for CSM and Riso Ground Fault Detector Trip Jack Flicker and Jay Johnson

    E-Print Network [OSTI]

    " in the ground fault ground fault fuse.. As a result of this discovery, the Solar America Board for Codes and Standards identified a number of alternatives to ground fault fuses, but these technologies have limited on rooftop systems, the resulting fire can burn down the building and put occupants' lives at risk. Further

  7. Compiler-directed Program-fault Coverage for Highly Available Java Internet Services

    E-Print Network [OSTI]

    Martin, Richard P.

    Haverford, PA 19041 Abstract: We present a new approach that uses compiler- directed fault-injection appli- cation code in two ways: to direct fault injection to occur at appropriate points during analyses to direct fault injection and measure the resulting coverage of recovery code. Our technique

  8. A conceptual model for the origin of fault damage zone structures in high-porosity sandstone

    E-Print Network [OSTI]

    Cowie, Patience

    A conceptual model for the origin of fault damage zone structures in high-porosity sandstone Zoe K-porosity sandstones. Damage zone deformation has been particularly well constrained for two 4-km-long normal faults formed in the Navajo Sandstone of central Utah, USA. For these faults the width of the damage zone

  9. Yield Modeling and Analysis of a Clockless Asynchronous Wave Pipeline with Pulse Faults

    E-Print Network [OSTI]

    Ayers, Joseph

    Yield Modeling and Analysis of a Clockless Asynchronous Wave Pipeline with Pulse Faults T. Feng fault model and its modeling and analysis methods in a clockless asynchronous wave pipeline fault rate model for establishing a sound theoretical foundation for clockless wave pipeline design

  10. Modeling the heterogeneous hydraulic properties of faults using constraints from reservoir-induced

    E-Print Network [OSTI]

    Cowie, Patience

    Modeling the heterogeneous hydraulic properties of faults using constraints from reservoir the damage zone surrounding faults. The Ac¸u dam is a 34 m high earth-filled dam constructed in 1983 pattern of earthquake clustering and migration that suggests heterogeneous fault zone hydraulic properties

  11. Dynamic State Alteration Techniques for Automatically Locating Software Errors

    E-Print Network [OSTI]

    Jeffrey, Dennis

    2009-01-01

    Overview of Software Testing and Debugging . . . . . . .International Symposium on Software Testing and Analysis,and regression faults. Software Testing, Verification and

  12. Fault tolerant control of automatically controlled vehicles in response to brake system failures 

    E-Print Network [OSTI]

    Hsien, Li-Wei

    1998-01-01

    Increasing highway traffic congestion and high cost of ics. building new highways have brought out a renewed design of an Automated Highway System (AHS). Since safety is an important issue in the development of an AHS, ...

  13. Faults and gravity anomalies over the East Mesa hydrothermal-geothermal system

    SciTech Connect (OSTI)

    Goldstein, N.E.; Carle, S.

    1986-05-01

    Detailed interpretations of gravity anomalies over geothermal systems may be extremely useful for mapping the fracture or fault systems that control the circulation of the thermal waters. This approach seems to be particularly applicable in areas like the Salton Trough where reactions between the thermal waters and the porous sediments produce authigenic-hydrothermal minerals in sufficient quantity to cause distinct gravity anomalies at the surface. A 3-D inversion of the residual Bouguer gravity anomaly over the East Mesa geothermal field was made to examine the densified volume of rock. We show that the data not only resolve a north-south and an intersecting northwest structure, but that it may be possible to distinguish between the active present-day hydrothermal system and an older and cooler part of the system. The densified region is compared spatially to self-potential, thermal and seismic results and we find a good concordance between the different geophysical data sets. Our results agree with previous studies that have indicated that the main feeder fault recharging the East Mesa reservoir dips steeply to the west.

  14. High voltage fault current limiter having immersed phase coils

    DOE Patents [OSTI]

    Darmann, Francis Anthony

    2014-04-22

    A fault current limiter including: a ferromagnetic circuit formed from a ferromagnetic material and including at least a first limb, and a second limb; a saturation mechanism surrounding a limb for magnetically saturating the ferromagnetic material; a phase coil wound around a second limb; a dielectric fluid surrounding the phase coil; a gaseous atmosphere surrounding the saturation mechanism.

  15. Ris-M-2311 AUTOMATIC FAULT TREE CONSTRUCTION WITH RIKKE

    E-Print Network [OSTI]

    evaluated and listed. The cut sets were evaluated using FAUNET and the FAUNET interface programs included order. During evaluation of the HI fault tree an interesting effect was observed. The shut off valve circuit with cross coupling to two gas flow sensors. The sensors are represented by the "load" components

  16. Fault-Tolerant Queries over Sensor Data Iosif Lazaridis1

    E-Print Network [OSTI]

    Venkatasubramanian, Nalini

    -generated values in the presence of faults. Small sensors are fragile, have fi- nite energy and memory demon- strate the good performance of FATE-CSQ compared to competing protocols with realistic simulation, thus im- proving reaction times, (iii) preserving the crucial re- sources of wireless bandwidth

  17. IEEE TRANSACTION ON COMPUTERS 1 Adaptive Fault Management of Parallel

    E-Print Network [OSTI]

    Lan, Zhiling

    of high performance computing (HPC) continues to grow, application fault resilience becomes crucial- tions, High performance computing, Large-scale systems. I. INTRODUCTION IN the field of high performance Performance Computing Zhiling Lan, Member, IEEE, and Yawei Li, Student Member, IEEE Abstract--As the scale

  18. Experimental and computational studies on stacking faults in zinc titanate

    SciTech Connect (OSTI)

    Sun, W.; Ageh, V.; Mohseni, H.; Scharf, T. W. E-mail: Jincheng.Du@unt.edu; Du, J. E-mail: Jincheng.Du@unt.edu

    2014-06-16

    Zinc titanate (ZnTiO{sub 3}) thin films grown by atomic layer deposition with ilmenite structure have recently been identified as an excellent solid lubricant, where low interfacial shear and friction are achieved due to intrafilm shear velocity accommodation in sliding contacts. In this Letter, high resolution transmission electron microscopy with electron diffraction revealed that extensive stacking faults are present on ZnTiO{sub 3} textured (104) planes. These growth stacking faults serve as a pathway for dislocations to glide parallel to the sliding direction and hence achieve low interfacial shear/friction. Generalized stacking fault energy plots also known as ?-surfaces were computed for the (104) surface of ZnTiO{sub 3} using energy minimization method with classical effective partial charge potential and verified by using density functional theory first principles calculations for stacking fault energies along certain directions. These two are in qualitative agreement but classical simulations generally overestimate the energies. In addition, the lowest energy path was determined to be along the [451{sup ¯}] direction and the most favorable glide system is (104) ?451{sup ¯}? that is responsible for the experimentally observed sliding-induced ductility.

  19. Sensor Fault Detection in Power Plants Andrew Kusiak1

    E-Print Network [OSTI]

    Kusiak, Andrew

    Sensor Fault Detection in Power Plants Andrew Kusiak1 and Zhe Song2 Abstract: This paper presents models; Diagnosis; Combustion; Power plants; Probe instruments. Introduction Measurements in industrial and Soroush 2003 . Any false reading could lead to di- sastrous outcomes. In a coal-fired power plant, faulty

  20. Discriminative Pattern Mining in Software Fault Detection Giuseppe Di Fatta

    E-Print Network [OSTI]

    Leue, Stefan

    and Subject Descriptors D.2.5 [Software Engineering]: Testing and Debugging-- Debugging aids, Diagnostics. This money is largely spent during the software testing and debugging phases [12]. The applicable software of software testing data which can support and speedup the detection of software faults. The most commonly

  1. Fault properties from seismic Q M. H. Worthington1

    E-Print Network [OSTI]

    Cambridge, University of

    . Key words: attenuation, exploration seismology, fault models, Q, seismic wave propagation. I N T R O DFault properties from seismic Q M. H. Worthington1 and J. A. Hudson2 1 T. H. Huxley School of seismic Q from a North Sea vertical seismic pro®ling data set has revealed an abrupt increase

  2. Resource Aggregation for Fault Tolerance in Integrated Services Networks

    E-Print Network [OSTI]

    Dovrolis, Constantinos

    it is critical that the failure of a network component does not lead to unexpected termination or long dis of RAFT is to setup every fault tolerant flow along a secondary path that serves as a backup in case the primary path fails. The secondary path resource reservations are aggregated whenever possible to reduce

  3. Test Case Purification for Improving Fault Localization Jifeng Xuan

    E-Print Network [OSTI]

    Test Case Purification for Improving Fault Localization Jifeng Xuan INRIA Lille - Nord Europe Lille on the execution trace of test cases. Failing test cases and their assertions form test oracles for the failing behavior of the system under analysis. In this paper, we propose a novel concept of spectrum driven test

  4. Observability of Stuck-at-Faults with Differential Power Analysis

    E-Print Network [OSTI]

    Boyer, Edmond

    ,flottes,rouzeyre}@lirmm.fr Abstract In this paper we propose an innovative method to test integrated circuits based on the use of the current consumed by the circuit during net transitions, it does not require observing primary outputs of the circuit and allows the test of hard-to-observe faults. Conversely to Iddq, this technique is not sensible

  5. Fault-Tolerant and Reliable Computation in Cloud Computing

    E-Print Network [OSTI]

    Deng, Jing

    Fault-Tolerant and Reliable Computation in Cloud Computing Jing Deng Scott C.-H. Huang Yunghsiang S, Taipei, 106 Taiwan. § Intelligent Automation, Inc., Rockville, MD, USA. Abstract-- Cloud computing of scientific computation in cloud computing. We investigate a cloud selection strategy to decompose the matrix

  6. Risk Assessment of Railway Transportation Systems using Timed Fault Trees

    E-Print Network [OSTI]

    Miller, Alice

    by the GRAIL (GNSS Introduction in the RAIL sector) project that is under development cooperated with ERTMS difference between the GRAIL and current railway systems is that it involves unmanned operation. Trains to eliminate the fault, to prevent the accident. There are still many unsolved problems related to GRAIL

  7. A Fault Tolerant Hierarchical Network on Chip Router Architecture

    E-Print Network [OSTI]

    Zilic, Zeljko

    Received: 15 March 2012 /Accepted: 19 July 2013 # Springer Science+Business Media New York 2013 Abstract and energy consumption. Keywords Network on chip . Hierarchical topology . Fault-tolerant 1 Introduction DueC architectures supply a practical alternative for traditional SoC interconnect ap- proaches [3]. While

  8. SUSTAIN: An Adaptive Fault Tolerance Service for Geographically Overlapping

    E-Print Network [OSTI]

    Han, Qi "Chee"

    -Physical Systems Gholam Abbas Angouti Kolucheh and Qi Han Department of Mathematical and Computer Sciences. However, constant failures may occur in these WSNs, causing a network to be partitioned into several parts sensor networks; fault tolerance; network protocol; cyber physical systems 1. INTRODUCTION Cyber

  9. Principal Component Analysis for Fault Detection and Structure Health Monitoring

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Principal Component Analysis for Fault Detection and Structure Health Monitoring Nicolas Stoffels structure to ensure its health monitoring. The proposed approach is based on the PCA algorithm. Once PCA promptly and precisely [5]. FDI is also important in SHM (Structure Health Monitoring) because of aging

  10. Power Transformer faulT DeTecTor

    E-Print Network [OSTI]

    Mucina, Ladislav

    Power Transformer faulT DeTecTor Summary of technology Power transformers are major parts of the power distribution network, used to step up and step down voltages for transmission between power stations and electricity consumers. Transformers are prone to failure due to external damage or general

  11. Module Placement for Fault-Tolerant Microfluidics-Based Biochips

    E-Print Network [OSTI]

    Chakrabarty, Krishnendu

    Module Placement for Fault-Tolerant Microfluidics-Based Biochips FEI SU and KRISHNENDU CHAKRABARTY Duke University Microfluidics-based biochips are soon expected to revolutionize clinical diagnosis, DNA sequencing, and other laboratory procedures involving molecular biology. Most microfluidic biochips today

  12. Identifying Efficiency Degrading Faults in Split Air Conditioning Systems 

    E-Print Network [OSTI]

    Terrill, T. J.; Brown, M. L.; Cheyne, R. W. Jr.; Cousins, A. J.; Daniels, B. P.; Erb, K. L.; Garcia, P. A.; Leutermann, M. J.; Nel, A. J.; Robert, C. L.; Widger, S. B.; Williams, A. G.; Rasmussen, B. P.

    2013-01-01

    and fault diagnosis of vapor-compression equipment." HVAC&R Research 15.3 (2009): 597-616. (12) N, Lu et al., ?Air Conditioner Compressor Performance Model,? Pac. NW Nat. Lib., Richland, WA, Rep. PNNL-17796, 2008. (13) A. Maier, ?Troubleshooting Thermal...

  13. Consequences of Fault Currents Contributed by Distributed Generation

    E-Print Network [OSTI]

    the system Zbus matrix. The effects of merchant plants, such as Independent Power Producers, are not taken Power Systems Engineering Research Center A National Science Foundation Industry/University Cooperative Research Center since 1996 PSERC #12;Power Systems Engineering Research Center Consequences of Fault

  14. Java Card Operand Stack: Fault Attacks, Combined Attacks and Countermeasures

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Java Card Operand Stack: Fault Attacks, Combined Attacks and Countermeasures Guillaume Barbu1. Until 2009, Java Cards have been mainly threatened by Log- ical Attacks based on ill-formed applications. The publication of the Java Card 3.0 Connected Edition specifications and their mandatory on-card byte code

  15. Fracture surface energy of the Punchbowl fault, San Andreas system

    E-Print Network [OSTI]

    Chester, Frederick M.

    Fracture surface energy of the Punchbowl fault, San Andreas system Judith S. Chester1 , Frederick M. Chester1 & Andreas K. Kronenberg1 Fracture energy is a form of latent heat required to create weakening1­3 . Fracture energy has been estimated from seismological and experimental rock deformation data4

  16. Highly Available, Fault-Tolerant, Parallel Dataflows Mehul A. Shah

    E-Print Network [OSTI]

    Hellerstein, Joseph M.

    Highly Available, Fault-Tolerant, Parallel Dataflows Mehul A. Shah U.C. Berkeley mashah@cs.berkeley.edu Joseph M. Hellerstein U.C. Berkeley Intel Research, Berkeley jmh@cs.berkeley.edu Eric Brewer U.C. This delicate inte- gration allows us to tolerate failures of portions of a parallel dataflow without

  17. Algorithm-Based Fault Tolerance for Fail-Stop Failures

    E-Print Network [OSTI]

    Dongarra, Jack

    after failures, the next generation high performance computing applications need to be able to continue1 Algorithm-Based Fault Tolerance for Fail-Stop Failures Zizhong Chen and Jack Dongarra Abstract Fail-stop failures in distributed environments are often tolerated by checkpointing or message logging

  18. Thrust faulting in Temblor Range, Kern County, California

    SciTech Connect (OSTI)

    Simonson, R.R.

    1991-02-01

    Surface and subsurface studies confirm the presence of overthrusting in the Temblor Range between Gonyer Canyon and Recruit Pass. In the subsurface, three wells have penetrated the Cree fault, the Hudbay Cree' No. 1 (7,300 ft), the Frantzen Oil Company Cree' No. 1 (5,865 ft) and the Arco Cree Fee' 1A well (5,915 ft). Below the fault, 25 to 35{degree} of westerly dips on the west flank of the sub-thrust Phelps anticline are encountered. The McDonald section below the fault is comprised of siliceous fractured shale which contains live oil and gas showings. A drill-stem test of the interval from 8,247 to 8,510 ft in the Frantzen well resulted in a recovery of 1,200 ft clean 34{degree} oil and 40 MCF per day gas. The shut in pressure was 3,430 lb, which is a normal hydrostatic pressure common to the producing structures in the southern San Joaquin Valley. The equivalent of this interval has produced over 7,000 bbl of oil in the Arco Cree' 1A well. The Arco Cree Fee' No. 1A well crossed the axis of the Phelps Anticline as indicated by good dipmeter and bottomed in Lower Zemorrian at 14,512 ft total depth. This well was not drilled deep enough to reach the Point of Rocks Sand and did not test the gas showings in the lower Miocene section. In the Gonyer Canyon area, subsurface evidence indicated conditions are similar to those in the Cree area because a large structure is present below a thrust fault. It is believed that significant accumulations will be found beneath thrust faults in the eastern part of the Temblor Range where conditions are similar to those that were instrumental in forming fields such as the Elk Hills, B. V. Hills, Belgian Anticline and others.

  19. Extracting Patterns from Location History Andrew Kirmse

    E-Print Network [OSTI]

    Cortes, Corinna

    " to infer the user's important locations. The "Place lab client" infers locations by listening to RF-emissions different modes of transportation (e.g. bus, on foot, car etc.). Both these papers use clean regularly-sampled

  20. Direct observation of fault zone structure at the brittleductile transition along the SalzachEnnstalMariazellPuchberg fault

    E-Print Network [OSTI]

    Hacker, Bradley R.

    EnnstalMariazellPuchberg fault system, Austrian Alps Erik Frost,1,2 James Dolan,1 Lothar Ratschbacher,3 Bradley Hacker,4 no wider than a few tens of meters. Citation: Frost, E., J. Dolan, L. Ratschbacher, B. Hacker, and G and Evans, 1988; Scholz, 1988; Shimamoto, 1989; Hacker and Christie, 1990; Chester, 1995; White, 1996

  1. Development of Asset Fault Signatures for Prognostic and Health Management in the Nuclear Industry

    SciTech Connect (OSTI)

    Vivek Agarwal; Nancy J. Lybeck; Randall Bickford; Richard Rusaw

    2014-06-01

    Proactive online monitoring in the nuclear industry is being explored using the Electric Power Research Institute’s Fleet-Wide Prognostic and Health Management (FW-PHM) Suite software. The FW-PHM Suite is a set of web-based diagnostic and prognostic tools and databases that serves as an integrated health monitoring architecture. The FW-PHM Suite has four main modules: Diagnostic Advisor, Asset Fault Signature (AFS) Database, Remaining Useful Life Advisor, and Remaining Useful Life Database. This paper focuses on development of asset fault signatures to assess the health status of generator step-up generators and emergency diesel generators in nuclear power plants. Asset fault signatures describe the distinctive features based on technical examinations that can be used to detect a specific fault type. At the most basic level, fault signatures are comprised of an asset type, a fault type, and a set of one or more fault features (symptoms) that are indicative of the specified fault. The AFS Database is populated with asset fault signatures via a content development exercise that is based on the results of intensive technical research and on the knowledge and experience of technical experts. The developed fault signatures capture this knowledge and implement it in a standardized approach, thereby streamlining the diagnostic and prognostic process. This will support the automation of proactive online monitoring techniques in nuclear power plants to diagnose incipient faults, perform proactive maintenance, and estimate the remaining useful life of assets.

  2. PROBABILISTIC METHODS FOR LOCATION ESTIMATION IN

    E-Print Network [OSTI]

    Myllymäki, Petri

    PROBABILISTIC METHODS FOR LOCATION ESTIMATION IN WIRELESS NETWORKS Petri Kontkanen, Petri Myllym;PROBABILISTIC METHODS FOR LOCATION ESTIMATION IN WIRELESS NETWORKS Petri Kontkanen, Petri Myllym¨aki, Teemu Roos METHODS FOR LOCATION ESTIMATION IN WIRELESS NETWORKS Petri Kontkanen, Petri Myllymäki, Teemu Roos, Henry

  3. Can flat-ramp-flat fault geometry be inferred from fold shape?: A comparison of kinematic and mechanical folds

    E-Print Network [OSTI]

    Savage, Heather M.

    in the suprajacent fold shapes. Differences between the kinematic and mechanical fault-fold relationships highlight rights reserved. Keywords: Fault-bend folding; Mechanical models; Kinematic models; Fault geometry and mechanical models have been used to analyze fault-cored folds. Kinematic models, which balance the geometry

  4. Generalized Standby-Sparing Techniques for Energy-Efficient Fault Tolerance in Multiprocessor Real-Time Systems

    E-Print Network [OSTI]

    Aydin, Hakan

    Generalized Standby-Sparing Techniques for Energy-Efficient Fault Tolerance in Multiprocessor Real-Sparing (SS) technique has been pre- viously explored to improve energy efficiency while providing fault faults, we develop energy-efficient fault tolerance techniques for real-time systems deploying

  5. Integrated fault seal analysis and risk assessemt: Okan and Meren Fields, Nigeria

    SciTech Connect (OSTI)

    Eisenberg, R.A. (Chevron Petroleum Technology, Co., La Habra, CA (United States)); Brenneman, R.J. (Chevron Overseas Petroleum Co., San Ramon, CA (United States)); Adepoju, A.A. (Chevron Nigeria Ltd., Lagos (Nigeria))

    1996-01-01

    Integration of production, geochemical, seismic, well log, and structural data provides important constraints on the sealing capacity and dynamic behavior of fault juxtaposed reservoirs in Okan and Meren fields, offshore Nigeria. Correlations were found between pressure decline histories, juxtaposed fluid types, oil composition, fluid contact relationships, fault sealing/leaking condition, and estimates of the composition of the fault gouge. Fault plane sections defined reservoir juxtapositions and potential cross-fault spill points. Smear gouge ratios calculated from E-logs were used to estimate the composition of fault-gouge materials between juxtaposed reservoirs. These tools augmented interpretation of seal/nonseal character in proved reservoirs and were used to quantify fault seal risk of untested, fault-dependent closures. In the Okan Field juxtapositions of the G-, H, L-, M, and O-sands were analyzed. Smear gouge ratios correlated to fluid contact relationships and pressure decline histories within these juxtaposed reservoirs empirically calibrate sealing potential. The results of these analyses were then used to interpret production-induced fault seal breakdown within the G-sands and to risk seal integrity of fault-dependent closures within the untested 0-sands in an adjacent, upthrown fault block. Within this fault block the presence of potential fault intersection leak points and large areas of sand/sand juxtaposition with high smear gouge ratios (low sealing potential) limits column heights and potential reserves within the O-sand package. In the Meren Field the E- and G-sands are juxtaposed, on different pressure decline, geochemically distinct, and are characterized by low smear gouge ratios. In contrast, the G- and H-sands, juxtaposed across the same fault, contain similar OOWCs and are characterized by high smear gouge ratios.

  6. In the Proc. of International Conference on Parallel Processing (ICPP'07) Fault-Driven Re-Scheduling For Improving System-level Fault Resilience

    E-Print Network [OSTI]

    Lan, Zhiling

    In the Proc. of International Conference on Parallel Processing (ICPP'07) Fault-Driven Re-Scheduling For Improving System-level Fault Resilience Yawei Li* , Prashasta Gujrati* , Zhiling Lan* , Xian-he Sun,gujrpra,lan,sun}@iit.edu #Computing Division Fermi National Accelerator Laboratory Batavia, IL 60510-0500 Abstract The productivity

  7. Mechanical properties and fabric of the Punchbowl fault zone, California 

    E-Print Network [OSTI]

    Chester, Frederick Michael

    1983-01-01

    faults (DP10C) used in the Compression Tests. 88 22 Specimen configuration for Compression Tests. . 89 23 Specimen configuration for Shear Tests, . 92 LIST OF FIGURES (continued) FIGURE PAGE 24 Differential stress versus axial strai n... the motivation for establishing a program of earthquake-risk evaluation and prediction. One approach to earthquake-prediction (mechanistic approach of Higgs, 1 981 ) involves developing a sound understandi ng of the physical processes operative within...

  8. Dynamics of a Gear System with Faults in Meshing Stiffness

    E-Print Network [OSTI]

    Grzegorz Litak; Michael I. Friswell

    2004-05-23

    Gear box dynamics is characterised by a periodically changing stiffness. In real gear systems, a backlash also exists that can lead to a loss in contact between the teeth. Due to this loss of contact the gear has piecewise linear stiffness characteristics, and the gears can vibrate regularly and chaotically. In this paper we examine the effect of tooth shape imperfections and defects. Using standard methods for nonlinear systems we examine the dynamics of gear systems with various faults in meshing stiffness.

  9. Superconducting fault current-limiter with variable shunt impedance

    DOE Patents [OSTI]

    Llambes, Juan Carlos H; Xiong, Xuming

    2013-11-19

    A superconducting fault current-limiter is provided, including a superconducting element configured to resistively or inductively limit a fault current, and one or more variable-impedance shunts electrically coupled in parallel with the superconducting element. The variable-impedance shunt(s) is configured to present a first impedance during a superconducting state of the superconducting element and a second impedance during a normal resistive state of the superconducting element. The superconducting element transitions from the superconducting state to the normal resistive state responsive to the fault current, and responsive thereto, the variable-impedance shunt(s) transitions from the first to the second impedance. The second impedance of the variable-impedance shunt(s) is a lower impedance than the first impedance, which facilitates current flow through the variable-impedance shunt(s) during a recovery transition of the superconducting element from the normal resistive state to the superconducting state, and thus, facilitates recovery of the superconducting element under load.

  10. Community Detection from Location-Tagged Networks

    E-Print Network [OSTI]

    Liu, Zhi

    2015-01-01

    Many real world systems or web services can be represented as a network such as social networks and transportation networks. In the past decade, many algorithms have been developed to detect the communities in a network using connections between nodes. However in many real world networks, the locations of nodes have great influence on the community structure. For example, in a social network, more connections are established between geographically proximate users. The impact of locations on community has not been fully investigated by the research literature. In this paper, we propose a community detection method which takes locations of nodes into consideration. The goal is to detect communities with both geographic proximity and network closeness. We analyze the distribution of the distances between connected and unconnected nodes to measure the influence of location on the network structure on two real location-tagged social networks. We propose a method to determine if a location-based community detection...

  11. Helicopter magnetic survey conducted to locate wells

    SciTech Connect (OSTI)

    Veloski, G.A.; Hammack, R.W.; Stamp, V.; Hall, R.; Colina, K.

    2008-07-01

    A helicopter magnetic survey was conducted in August 2007 over 15.6 sq mi at the Naval Petroleum Reserve No. 3’s (NPR-3) Teapot Dome Field near Casper, Wyoming. The survey’s purpose was to accurately locate wells drilled there during more than 90 years of continuous oilfield operation. The survey was conducted at low altitude and with closely spaced flight lines to improve the detection of wells with weak magnetic response and to increase the resolution of closely spaced wells. The survey was in preparation for a planned CO2 flood for EOR, which requires a complete well inventory with accurate locations for all existing wells. The magnetic survey was intended to locate wells missing from the well database and to provide accurate locations for all wells. The ability of the helicopter magnetic survey to accurately locate wells was accomplished by comparing airborne well picks with well locations from an intense ground search of a small test area.

  12. Earthquake locations and seismic velocity models for Southern California

    E-Print Network [OSTI]

    Lin, Guoqing

    2007-01-01

    Linearized EarthquakeChapter 4. The COMPLOC Earthquake Location3-D Simultaneous Earthquake Locations and

  13. Impact of modern logistics on industrial location choice and property markets

    E-Print Network [OSTI]

    Li, Yu, 1976-

    2007-01-01

    The debate on the impact of modern logistics on industrial location choice and property markets focuses on (1) whether modern inventory control and supply- chain configuration consolidate manufacturing and distribution ...

  14. TaleBlazer : a platform for creating multiplayer location based games

    E-Print Network [OSTI]

    Medlock-Walton, Michael Paul

    2012-01-01

    TaleBlazer is a platform that allows users to create location-based games for their mobile device. Using a block-based programming language, game designers can control the behavior of agents that interact with the game ...

  15. Warm Standby in Hierarchically Structured Process-Control Programs

    E-Print Network [OSTI]

    Cao, Yong

    . Zndex Terms-Fault tolerance, process-control, standby replacement, replication, knowledge representation processes formulate long-term control strategies, e.g., optimizing resource management, whereas lower level CCR-9110816and the US Nuclear Regulatory Commissionunder award NRC-04-92-090. Recommended

  16. Significance of recurrent fault movement at Grays Point quarry, southeast Missouri

    SciTech Connect (OSTI)

    Diehl, S.F.; Throckmorton, C.K. ); Clendenin, C.W. )

    1993-03-01

    Geologic relationships indicate recurrent movement on a fault exposed at Grays Point, MO. Faulting offsets Middle-Late Ordovician Plattin Group, Decorah Group, Kimmswick Limestone, and Maquoketa Group strata. In plan, the fault is characterized by a relatively narrow zone (30--70 m) of northeast-striking fault slices associated with a northwest-striking zone of right-stepping en echelon fractures. This systematic fracture-fault array identifies right-lateral strike-slip movement. A vertically offset basal Decorah Group contact shows 22 m of down-to-the-southeast dip slip, which indicates a component of oblique slip. Oldest recognizable movement on the fault is evidenced by Maquoketa Group strata that fill a northeast-striking, wedge-shaped synform. Post-Ordovician movement along an adjacent subvertical fault displaces part of this synform 300 m right laterally. In thin section, the northwest-striking fracture set shows a polyphase history of deformation indicated by cataclastic textures and intrusion of carbonate-rich fluids. Three periods of movement occurred: (1) initial fracturing sealed by authigenic mineral cements; (2) renewed fracturing associated with recrystallization of sub-rounded clasts; and (3) subsequent brecciation marked by angular clasts and filling of fractures and vugs. Each successive fluid intrusion is characterized by an increase in grain size of the authigenic cement. The fault is subparallel to the regional, northeast-striking English Hill fault system. Polyphase oblique-slip deformation suggests that the fault, like others in southeastern Missouri, is a reactivated Late Proterozoic-Cambrian zone of weakness. Initial fault reactivation occurred during Middle-Late Ordovician as opposed to Devonian, as commonly interpreted for southeast Missouri. Multiple authigenic mineral cements imply that fluids may have been an important factor influencing the fault's tendency to be reactivated.

  17. Locating and tracking assets using RFID 

    E-Print Network [OSTI]

    Kim, Gak Gyu

    2009-05-15

    , this research presents a math¬ematical model of using RFID (both handheld readers and stationary readers) for e?cient asset location. We derive the expected cost of locating RFID¬tagged objects in a multi¬area environment where hand¬held RF readers are used. We...

  18. Using Recent Advances in 2D Seismic Technology and Surface Geochemistry to Economically Redevelop a Shallow Shelf Carbonate Reservoir: Vernon Field, Isabella County, Class Revisit

    SciTech Connect (OSTI)

    Wood, James R.; Bornhorst, T.J.; Harrison, William B.; Quinlan, W.

    2002-09-24

    Continued the fault study to find more faults and develop new techniques to visualize them. Data from the Dundee Formation was used to document 11 major faults in the Michigan Basin which have now been verified using data from other horizons. These faults control the locations of many of the large anticlinal structures in the Michigan Basin and likely controlled fluid movements as well.

  19. Postprint of article in Information and Software Technology (2012) On the adoption of MC/DC and control-flow adequacy

    E-Print Network [OSTI]

    2012-01-01

    /DC and control-flow adequacy for a tight integration of program testing and statistical fault localization*,** Bo programs using three adequacy criteria, 16 test case prioritization techniques, and four statistical fault, Beijing, China A B S T R A C T Context: Testing and debugging consume a significant portion of software

  20. Fault Diagnosis of Steam Generator Using Signed Directed Graph and Artificial Neural Networks

    SciTech Connect (OSTI)

    Aly, Mohamed N. [Nuclear Eng. Department, Fac. of Eng., Alex. Univ., Alex. (Egypt); Hegazy, Hesham N. [Nuclear Power Plants Authority, Cairo (Egypt)

    2006-07-01

    Diagnosis is a very complex and important task for finding the root cause of faults in nuclear power plants. The objective of this paper is to investigate the feasibility of using the combination of signed directed graph (SDG) and artificial neural networks for fault diagnosis in nuclear power plants especially in U-Tube steam generator. Signed directed graph has been the most widely used form of qualitative based model methods for process fault diagnosis. It is constructed to represent the cause-effect relations among the dynamic process variables. Signed directed graph consists of nodes represent the process variables and branches. The branch represents the qualitative influence of a process variable on the related variable. The main problem in fault diagnosis using the signed directed graph is the unmeasured variables. Therefore, neural networks are used to estimate the values of unmeasured nodes. In this work, different four cases of faults in the steam generator ( SG) have been diagnosed, three of them are single fault and the fourth is multiple fault. The first three faults are by pass valve leakage (Vbp(+)), main feed water valve opening increase (Vfw(+)), main feed water valve opening decrease (Vfw (-)). The fourth fault is a multiple fault where by-pass valve leakage and main feed water valve opening decrease (Vbp(+) and Vfw (-)) in the same time. The used data are collected from a basic principle simulator of pressurized water reactor 925 Mwe. The signed directed graph of the steam generator is constructed to represent the cause-effect relations among SG variables. It consists of 26 nodes represent the SG variables, and 48 branches represent the cause effect relations among this variables. For each fault the values of measured nodes are coming from sensors and the values of unmeasured nodes are coming from the trained neural networks. These values of the nodes are compared by normal values to get the sign of the nodes. The cause-effect graph for each fault is constructed from the steam generator signed directed graph by removing the invalid (normal) nodes and inconsistent branches. Then in the cause-effect graph we search about the node which does not have an input branch. This node is the fault origin node. The result of this work demonstrated that this method can be used in nuclear power plant fault diagnosis. The advantages of this method are, it enables us to diagnose a multi fault, it is not restricted by pre-defined faults, and it is fast method. (authors)

  1. Wind Power Plant Enhancement with a Fault-Current Limiter: Preprint

    SciTech Connect (OSTI)

    Muljadi, E.; Gevorgian, V.; DeLaRosa, F.

    2011-03-01

    This paper investigates the capability of a saturable core fault-current limiter to limit the short circuit current of different types of wind turbine generators.

  2. QUANTIFYING PHOTOVOLTAIC FIRE DANGER REDUCTION WITH ARC-FAULT CIRCUIT INTERRUPTERS

    E-Print Network [OSTI]

    QUANTIFYING PHOTOVOLTAIC FIRE DANGER REDUCTION WITH ARC-FAULT CIRCUIT INTERRUPTERS Kenneth M, shock hazards, and cause system downtime in photovoltaic (PV) systems. The 2011 National Electrical Code

  3. Microsoft Word - GroundFaultSAND-rev7-JJ.doc

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

    to describe analytically without transcendental equations, but the use of computer circuit simulations can describe the behavior of a PV system for a wide variety of fault...

  4. Does hydrologic circulation mask frictional heat on faults after large earthquakes?

    E-Print Network [OSTI]

    Fulton, Patrick M.; Harris, Robert N.; Saffer, Demian M.; Brodsky, Emily E.

    2010-01-01

    Fault stress states, pore pressure distributions, and thefrictional heating, and pore pressure scenarios show thatassuming hydrostatic pore pressure. Curiously, analysis of

  5. Multi-sensor Wireless System for Fault Detection in Induction Motors

    E-Print Network [OSTI]

    Tarkesh Esfahani, Ehsan

    2012-01-01

    Fault Diagnostics Using Wireless Sensor Networks,” IEEEOpportunities and Challenges of Wireless Sensor Networks inBrithinee, “The application of wireless sensor networks for

  6. Understanding Software Application Behaviour in Presence of Permanent and Intermittent Hardware Faults

    E-Print Network [OSTI]

    Sharma, Ankur

    2013-01-01

    to fault-tolerant soft- ware. ” Software Engineering, IEEEand Valeria Bertacco. “Software-based online detection ofAutomatic instruction-level software-only recovery. ” In

  7. Transform faults and lithospheric structure : insights from numerical models and shipboard and geodetic observations

    E-Print Network [OSTI]

    Takeuchi, Christopher S.

    2012-01-01

    Andrew Bain, Marion, and Prince Edward transform faults arePE, Prince Edward. . . . . . . . . . . . . . . . . . . . . .Bain; M, Marion; PE, Prince Edward. (a) Bathymetry (black)

  8. Hydrogen influence on generalized stacking fault of zirconium basal plane: First-principles calculation study

    E-Print Network [OSTI]

    Songjun, Hou; Zhi, Zeng

    2015-01-01

    The infuence of hydrogen on the generalized stacking fault (GSF) energy of the basal plane along the and directions in the hcp Zr were investigated by using the first-principles calculation method. The modification of the GSF energy were studied with respect to the different distances of H atoms away from the slip plane and hydrogen content there. The calculation results have shown that the GSF energy along the direction drastically reduces when H atoms locate nearby the slip plane. But H atoms slightly decrease the GSF barrier for the slipping case. Meanwhile, with the increase of hydrogen density around the slip plane, the GSF energies along both the shift directions further reduced. The physical origin of the reduction of GSF energy due to the existence of hydrogen atoms in Zr was analyzed based on the Bader charge method. It is interpreted by the Coulomb repulsion of the Zr atoms besides of the slip plane due to the charge transfer from Zr to H atoms.

  9. Coordinated Fault-Tolerance for High-Performance Computing Final Project Report

    SciTech Connect (OSTI)

    Panda, Dhabaleswar Kumar; Beckman, Pete

    2011-07-28

    With the Coordinated Infrastructure for Fault Tolerance Systems (CIFTS, as the original project came to be called) project, our aim has been to understand and tackle the following broad research questions, the answers to which will help the HEC community analyze and shape the direction of research in the field of fault tolerance and resiliency on future high-end leadership systems. Will availability of global fault information, obtained by fault information exchange between the different HEC software on a system, allow individual system software to better detect, diagnose, and adaptively respond to faults? If fault-awareness is raised throughout the system through fault information exchange, is it possible to get all system software working together to provide a more comprehensive end-to-end fault management on the system? #15; What are the missing fault-tolerance features that widely used HEC system software lacks today that would inhibit such software from taking advantage of systemwide global fault information? #15; What are the practical limitations of a systemwide approach for end-to-end fault management based on fault awareness and coordination? #15; What mechanisms, tools, and technologies are needed to bring about fault awareness and coordination of responses on a leadership-class system? #15; What standards, outreach, and community interaction are needed for adoption of the concept of fault awareness and coordination for fault management on future systems? Keeping our overall objectives in mind, the CIFTS team has taken a parallel fourfold approach. #15; Our central goal was to design and implement a light-weight, scalable infrastructure with a simple, standardized interface to allow communication of fault-related information through the system and facilitate coordinated responses. This work led to the development of the Fault Tolerance Backplane (FTB) publish-subscribe API specification, together with a reference implementation and several experimental implementations on top of existing publish-subscribe tools. #15; We enhanced the intrinsic fault tolerance capabilities representative implementations of a variety of key HPC software subsystems and integrated them with the FTB. Targeting software subsystems included: MPI communication libraries, checkpoint/restart libraries, resource managers and job schedulers, and system monitoring tools. #15; Leveraging the aforementioned infrastructure, as well as developing and utilizing additional tools, we have examined issues associated with expanded, end-to-end fault response from both system and application viewpoints. From the standpoint of system operations, we have investigated log and root cause analysis, anomaly detection and fault prediction, and generalized notification mechanisms. Our applications work has included libraries for fault-tolerance linear algebra, application frameworks for coupled multiphysics applications, and external frameworks to support the monitoring and response for general applications. #15; Our final goal was to engage the high-end computing community to increase awareness of tools and issues around coordinated end-to-end fault management.

  10. The Construction of Locative Situations: Locative Media and the Situationist International, Recuperation or Redux?

    E-Print Network [OSTI]

    McGarrigle, Conor

    2009-01-01

    closely aligned to the SI's construction of situations. ThisG (1957) Report on the Construction of Situations and on theThe Construction of Locative Situations: Locative Media and

  11. Subsystem fault tolerance with the Bacon-Shor code

    E-Print Network [OSTI]

    Panos Aliferis; Andrew W. Cross

    2007-03-29

    We discuss how the presence of gauge sub-systems in the Bacon-Shor code [D. Bacon, Phys. Rev. A 73, 012340 (2006)] leads to remarkably simple and efficient methods for fault-tolerant error correction (FTEC). Most notably, FTEC does not require entangled ancillary states and it can be implemented with nearest-neighbor two-qubit measurements. By using these methods, we prove a lower bound on the quantum accuracy threshold, 1.94 \\times 10^{-4} for adversarial stochastic noise, that improves previous lower bounds by nearly an order of magnitude.

  12. A Fault Oblivious Extreme-Scale Execution Environment

    SciTech Connect (OSTI)

    McKie, Jim

    2014-11-20

    The FOX project, funded under the ASCR X-stack I program, developed systems software and runtime libraries for a new approach to the data and work distribution for massively parallel, fault oblivious application execution. Our work was motivated by the premise that exascale computing systems will provide a thousand-fold increase in parallelism and a proportional increase in failure rate relative to today’s machines. To deliver the capability of exascale hardware, the systems software must provide the infrastructure to support existing applications while simultaneously enabling efficient execution of new programming models that naturally express dynamic, adaptive, irregular computation; coupled simulations; and massive data analysis in a highly unreliable hardware environment with billions of threads of execution. Our OS research has prototyped new methods to provide efficient resource sharing, synchronization, and protection in a many-core compute node. We have experimented with alternative task/dataflow programming models and shown scalability in some cases to hundreds of thousands of cores. Much of our software is in active development through open source projects. Concepts from FOX are being pursued in next generation exascale operating systems. Our OS work focused on adaptive, application tailored OS services optimized for multi ? many core processors. We developed a new operating system NIX that supports role-based allocation of cores to processes which was released to open source. We contributed to the IBM FusedOS project, which promoted the concept of latency-optimized and throughput-optimized cores. We built a task queue library based on distributed, fault tolerant key-value store and identified scaling issues. A second fault tolerant task parallel library was developed, based on the Linda tuple space model, that used low level interconnect primitives for optimized communication. We designed fault tolerance mechanisms for task parallel computations employing work stealing for load balancing that scaled to the largest existing supercomputers. Finally, we implemented the Elastic Building Blocks runtime, a library to manage object-oriented distributed software components. To support the research, we won two INCITE awards for time on Intrepid (BG/P) and Mira (BG/Q). Much of our work has had impact in the OS and runtime community through the ASCR Exascale OS/R workshop and report, leading to the research agenda of the Exascale OS/R program. Our project was, however, also affected by attrition of multiple PIs. While the PIs continued to participate and offer guidance as time permitted, losing these key individuals was unfortunate both for the project and for the DOE HPC community.

  13. Stacking fault induced tunnel barrier in platelet graphite nanofiber

    SciTech Connect (OSTI)

    Lan, Yann-Wen, E-mail: chiidong@phys.sinica.edu.tw, E-mail: ywlan@phys.sinica.edu.tw; Chang, Yuan-Chih; Chang, Chia-Seng; Chen, Chii-Dong, E-mail: chiidong@phys.sinica.edu.tw, E-mail: ywlan@phys.sinica.edu.tw [Institute of Physics, Academia Sinica, Taipei 115, Taiwan (China); Chang, Wen-Hao [Institute of Physics, Academia Sinica, Taipei 115, Taiwan (China); Graduate Institute of Opto-Mechatronics, National Chung Cheng University, Chia-Yi 62102, Taiwan (China); Li, Yuan-Yao [Graduate Institute of Opto-Mechatronics, National Chung Cheng University, Chia-Yi 62102, Taiwan (China)

    2014-09-08

    A correlation study using image inspection and electrical characterization of platelet graphite nanofiber devices is conducted. Close transmission electron microscopy and diffraction pattern inspection reveal layers with inflection angles appearing in otherwise perfectly stacked graphene platelets, separating nanofibers into two domains. Electrical measurement gives a stability diagram consisting of alternating small-large Coulomb blockade diamonds, suggesting that there are two charging islands coupled together through a tunnel junction. Based on these two findings, we propose that a stacking fault can behave as a tunnel barrier for conducting electrons and is responsible for the observed double-island single electron transistor characteristics.

  14. Waste Management Fault Tree Data Bank (WM): 1992 status report

    SciTech Connect (OSTI)

    Baughman, D.F.; Hang, P.; Townsend, C.S.

    1993-08-30

    The Risk Assessment Methodology Group (RAM) of the Nuclear Process Safety Research Section (NPSR) maintains a compilation of incidents that have occurred in the Waste Management facilities. The Waste Management Fault Tree Data Bank (WM) contains more than 35,000 entries ranging from minor equipment malfunctions to incidents with significant potential for injury or contamination of personnel. This report documents the status of the WM data bank including: availability, training, source of data, search options, and usage, to which these data have been applied. Periodic updates to this memorandum are planned as additional data or applications are acquired.

  15. Earthquake Location, Direct, Global-Search Methods E 2449 Earthquake Location,

    E-Print Network [OSTI]

    Earthquake Location, Direct, Global-Search Methods E 2449 Earthquake Location, Direct, Global Kingdom Article Outline Glossary Definition of the Subject Introduction The Earthquake Location Problem or temporal av- erage of some characteristic of an earthquake, such as surface shaking intensity or moment

  16. Tectonic controls on fracture permeability in a geothermal reservoir at Dixie Valley, Nevada

    SciTech Connect (OSTI)

    Hickman, S.; Zoback, M.

    1998-08-01

    To help determine the nature and origins of permeability variations within a fault-hosted geothermal reservoir at Dixie Valley, Nevada, the authors conducted borehole televiewer logging and hydraulic fracturing stress measurements in six wells drilled into the Stillwater fault zone at depths of 2--3 km. Televiewer logs from wells penetrating the highly permeable portion of the fault zone revealed extensive drilling-induced tensile fractures. As the Stillwater fault at this location dips S45{degree}E at {approximately} 53{degree} it is nearly at the optimal orientation for normal faulting in the current stress field. Hydraulic fracturing tests from these permeable wells show that the magnitude of S{sub hmin} is very low relative to the vertical stress S{sub v}. Similar measurements conducted in two wells penetrating a relatively impermeable segment of the Stillwater fault zone 8 and 20 km southwest of the producing geothermal reservoir indicate that the orientation of S{sub hmin} is S20{degree}E and S41{degree}E, respectively, with S{sub hmin}/S{sub v} ranging from 0.55--0.64 at depths of 1.9--2.2 km. This stress orientation is near optimal for normal faulting on the Stillwater fault in the northernmost non-producing well, but {approximately} 40{degree} rotated from the optimal orientation for normal faulting in the southernmost well. The observation that borehole breakouts were present in these nonproducing wells, but absent in wells drilled into the permeable main reservoir, indicates a significant increase in the magnitude of maximum horizontal principal stress, S{sub Hmax}, in going from the producing to non-producing segments of the fault. The increase in S{sub Hmaz}, coupled with elevated S{sub hmin}/S{sub v} values and a misorientation of the Stillwater fault zone with respect to the principal stress directions, leads to a decrease in the proximity of the fault zone to Coulomb failure. This suggests that a necessary condition for high reservoir permeability is that the Stillwater fault zone be critically stressed for frictional failure in the current stress field.

  17. Addressing endogeneity in residential location models

    E-Print Network [OSTI]

    Guevara-Cue, Cristián Angelo

    2005-01-01

    Some empirical residential location choice models have reported dwelling-unit price estimated parameters that are small, not statistically significant, or even positive. This would imply that households are non-sensitive ...

  18. Techniques for Mobile Location Estimation in UMTS 

    E-Print Network [OSTI]

    Thomas, Nicholas J

    The subject area of this thesis is the locating of mobile users using the future 3rd generation spread spectrum communication system UMTS. The motivation behind this work is twofold: firstly the United States Federal ...

  19. A Survey on the Warehouse Location Problem

    E-Print Network [OSTI]

    Cohen, Joseph J.

    The warehouse location problem has assumed numerous formulations, and solutions have been devised using a variety of mathematical techniques. The development of this effort is examined and relevant models presented for evaluation.

  20. Developing a theory of nightclub location choice

    E-Print Network [OSTI]

    Crim, Stephen J. (Stephen Johnson)

    2008-01-01

    This work is an investigation of the factors that influence where nightclubs locate within a city. Nightclubs, like other social spaces, provide important social and economic benefits in the urban environment. As amenities, ...

  1. Alternative Fuel Infrastructure Associate Location: San Diego

    E-Print Network [OSTI]

    California at Davis, University of

    Alternative Fuel Infrastructure Associate Location: San Diego Basic Functions Center an Alternative Fuel Infrastructure Associate that has a passion for sustainability, the environment, and accelerating the transition to a sustainable world powered by clean energy! The Alternative Fuel Infrastructure

  2. Merguerian, Charles, 1996b, Evidence for post-glacial surface faulting in New York City. The dynamic relationship between earthquakes and movement on reactivated faults

    E-Print Network [OSTI]

    Merguerian, Charles

    Merguerian, Charles, 1996b, Evidence for post-glacial surface faulting in New York City in New York City (abs.): Geological Society of America Abstracts with Programs, v. 28, no. 3, p. 81

  3. Fault-tolerant Holonomic Quantum Computation in Surface Codes

    E-Print Network [OSTI]

    Yi-Cong Zheng; Todd A. Brun

    2015-02-04

    We show that universal holonomic quantum computation (HQC) can be achieved fault-tolerantly by adiabatically deforming the gapped stabilizer Hamiltonian of the surface code, where quantum information is encoded in the degenerate ground space of the system Hamiltonian. We explicitly propose procedures to perform each logical operation, including logical state initialization, logical state measurement, logical CNOT, state injection and distillation,etc. In particular, adiabatic braiding of different types of holes on the surface leads to a topologically protected, non-Abelian geometric logical CNOT. Throughout the computation, quantum information is protected from both small perturbations and low weight thermal excitations by a constant energy gap, and is independent of the system size. Also the Hamiltonian terms have weight at most four during the whole process. The effect of thermal error propagation is considered during the adiabatic code deformation. With the help of active error correction, this scheme is fault-tolerant, in the sense that the computation time can be arbitrarily long for large enough lattice size. It is shown that the frequency of error correction and the physical resources needed can be greatly reduced by the constant energy gap.

  4. Mobility and coalescence of stacking fault tetrahedra in Cu

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Martínez, Enrique; Uberuaga, Blas P.

    2015-03-13

    Stacking fault tetrahedra (SFTs) are ubiquitous defects in face-centered cubic metals. They are produced during cold work plastic deformation, quenching experiments or under irradiation. From a dislocation point of view, the SFTs are comprised of a set of stair-rod dislocations at the (110) edges of a tetrahedron bounding triangular stacking faults. These defects are extremely stable, increasing their energetic stability as they grow in size. At the sizes visible within transmission electron microscope they appear nearly immobile. Contrary to common belief, we show in this report, using a combination of molecular dynamics and temperature accelerated dynamics, how small SFTs canmore »diffuse by temporarily disrupting their structure through activated thermal events. More over, we demonstrate that the diffusivity of defective SFTs is several orders of magnitude higher than perfect SFTs, and can be even higher than isolated vacancies. Finally, we show how SFTs can coalesce, forming a larger defect in what is a new mechanism for the growth of these omnipresent defects.« less

  5. Pipeline coating impedance effects on powerline fault current coupling

    SciTech Connect (OSTI)

    Dabkowski, J.

    1989-12-01

    Prior research leading to the development of predictive electromagnetic coupling computer codes has shown that the coating conductance is the principal factor in determining the response of a pipeline to magnetic induction from an overhead power transmission line. Under power line fault conditions, a high voltage may stress the coating causing a significant change in its conductance, and hence, the coupling response. Based upon laboratory experimentation and analysis, a model has been developed which allows prediction of the modified coating characteristics when subjected to high voltage during fault situations. Another program objective was the investigation of a method to determine the high voltage behavior of an existing coating from low voltage in situ field measurements. Such a method appeared conceptually feasible for non-porous coatings whose conductance is primarily a result of current leakage through existing holidays. However, limited testing has shown that difficulties in determining the steel-electrolyte capacitance limit the application of the method Methods for field measurement of the pipeline coating conductance were also studied for both dc ad ac signal excitation. Ac techniques offer the advantage that cathodic protection current interruption is not required, thus eliminating depolarization effects. However, ac field measurement techniques need additional refinement before these methods can be generally applied. 53 figs.

  6. Fault Detection Likelihood of Test Sequence Length Fevzi Belli, Michael Linschulte

    E-Print Network [OSTI]

    Belli, Fevzi

    accepted hypothesis is that the longer the test sequences, the higher the chances to detect faults. However the length of test sequences. · For our experiments the length of sequences varied from 2 to 4, definingFault Detection Likelihood of Test Sequence Length Fevzi Belli, Michael Linschulte University

  7. Test Suite Reduction for Fault Detection and Localization: A Combined Approach

    E-Print Network [OSTI]

    Beszedes, Árpád

    detection capability of a test suite in general is hard, and the mostly accepted method is to use different from fault localization viewpoint. Based on this observation, we defined a test reduction methodTest Suite Reduction for Fault Detection and Localization: A Combined Approach László Vidács

  8. Machine-learning Based Automated Fault Detection in Seismic Chiyuan Zhang and Charlie Frogner (MIT),

    E-Print Network [OSTI]

    Poggio, Tomaso

    Machine-learning Based Automated Fault Detection in Seismic Traces Chiyuan Zhang and Charlie no seismic data has been migrated. Our novel method is based on machine learning tech- niques and can a machine learning approach: We generate a set of seismic traces from velocity models containing faults

  9. Faulting and hydration of the Juan de Fuca plate system Mladen R. Nedimovi a,c,

    E-Print Network [OSTI]

    Bohnenstiehl, Delwayne

    Available online xxxx Editor: R.D. van der Hilst Keywords: Juan de Fuca plate system seismic reflection imaging faulting hydration earthquakes Multichannel seismic observations provide the first direct images faulting within this young and sediment insulated oceanic plate is primarily limited to approximately Moho

  10. 1 Assessing the work budget and efficiency of fault systems 2 using mechanical models

    E-Print Network [OSTI]

    Cooke, Michele

    strain energy of the faulted 19 area (Wint), at a ``cost'' of work done against friction and gravity (and propagation and 20 seismic energy, where applicable). Calculations of minimum work deformation match 21 of fault systems. Furthermore, calculation of potential 24 seismic energy release can provide an upper

  11. REPLICATION AND FAULT-TOLERANCE IN THE ISIS SYSTEM t Kenneth P. Birman

    E-Print Network [OSTI]

    Keinan, Alon

    REPLICATION AND FAULT-TOLERANCE IN THE ISIS SYSTEM t Kenneth P. Birman Department of Computer Science Cornell University, Ithaca, New York ABSTRACT The ISIS system transforms abstract type. The performance of distributed fault-tolerant services runnin8 on this initial version of ISIS is found

  12. Proactive Service Migration for Long-Running Byzantine Fault Tolerant Systems Wenbing Zhao and Honglei Zhang

    E-Print Network [OSTI]

    Zhao, Wenbing

    Proactive Service Migration for Long-Running Byzantine Fault Tolerant Systems Wenbing Zhao scheme based on service migration for long-running Byzantine fault tolerant systems. Proactive recovery threats from malicious adversaries. The primary benefit of our proactive recovery scheme is a reduced

  13. Morphology, displacement, and slip rates along the North Anatolian Fault, Turkey

    E-Print Network [OSTI]

    Hubert-Ferrari, Aurélia

    Morphology, displacement, and slip rates along the North Anatolian Fault, Turkey Aure´lia Hubert, Ayazaga, Istanbul, Turkey Received 29 January 2001; revised 8 January 2002; accepted 13 January 2002 the central and eastern North Anatolian Fault (NAF) in Turkey. The NAF total displacement is reevaluated using

  14. Aalborg Universitet Joint Parametric Fault Diagnosis and State Estimation Using KF-ML Method

    E-Print Network [OSTI]

    Yang, Zhenyu

    -ML Method Zhen Sun Zhenyu Yang Department of Energy Technology, Aalborg University, 6700 Esbjerg, DenmarkAalborg Universitet Joint Parametric Fault Diagnosis and State Estimation Using KF-ML Method Sun University Citation for published version (APA): Sun, Z., & Yang, Z. (2014). Joint Parametric Fault Diagnosis

  15. Evidence for a Supershear Transient during the 2002 Denali Fault Earthquake

    E-Print Network [OSTI]

    Carlson, Jean

    Evidence for a Supershear Transient during the 2002 Denali Fault Earthquake Eric M. Dunham subshear slip pulse on the fault. Introduction On November 3, 2002, a Mw 7.9 earthquake shook central than FN. This is not typical of large strike-slip earthquakes, as discussed by Archuleta and Hartzell

  16. A Regression Algorithm for the Smart Prognosis of a Reversed Polarity Fault in a Photovoltaic Generator

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A Regression Algorithm for the Smart Prognosis of a Reversed Polarity Fault in a Photovoltaic database containing sample data is used for simulation purposes. Keywords--Photovoltaic generator, SVR, k-NNR, reversed polarity fault, diagnosis, prognosis. NOMENCLATURE PV = Photovoltaic; SVM = Support Vector

  17. A Smart Algorithm for the Diagnosis of Short-Circuit Faults in a Photovoltaic Generator

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A Smart Algorithm for the Diagnosis of Short-Circuit Faults in a Photovoltaic Generator Wail Rezgui observations distributed over classes is used for simulation purposes. Keywords--Photovoltaic generator, SVM, k-NN, short-circuit fault, smart classification, linear programming. NOMENCLATURE PV = Photovoltaic; SVM

  18. Limitations for detecting small-scale faults using the coherency analysis of seismic data 

    E-Print Network [OSTI]

    Barnett, David Benjamin

    2006-08-16

    be distinguished from noise. Results from application of the coherency analysis were applied to the characterization of a very deep fault and fracture system imaged by a field seismic data set. A series of reverse and strike-slip faults were detected and mapped...

  19. Fault Evolution in Photovoltaic Array During Night-to-Day Transition

    E-Print Network [OSTI]

    Lehman, Brad

    Fault Evolution in Photovoltaic Array During Night-to-Day Transition Ye Zhao, Brad Lehman Abstract-- This paper focuses on fault evolution in a photovoltaic array during night-to-day transition in the PV array and become a potential hazard for system efficiency and reliability. Keywords - photovoltaic

  20. Off-fault plasticity and earthquake rupture dynamics: 2. Effects of fluid saturation

    E-Print Network [OSTI]

    Off-fault plasticity and earthquake rupture dynamics: 2. Effects of fluid saturation Robert C slip-weakening behavior is specified, and the off-fault material is described using an elastic-plastic poroelastoplastic materials with and without plastic dilation. During nondilatant undrained response near

  1. Interplay between faulting and base level in the development of Himalayan frontal fold topography

    E-Print Network [OSTI]

    Interplay between faulting and base level in the development of Himalayan frontal fold topography] Fold topography preserves a potentially accessible record of the structure and evolution of an underlying thrust fault system, provided we understand the factors that shape that topography. Here we

  2. A Petri Net Model for Secure and Fault-Tolerant Cloud-Based Information Storage

    E-Print Network [OSTI]

    Xu, Haiping

    333 A Petri Net Model for Secure and Fault-Tolerant Cloud-Based Information Storage Daniel F. Fitch, however, with data security, reliability, and availability in the cloud. In this paper, we address these concerns by proposing a novel security mechanism for secure and fault-tolerant cloud-based information

  3. Evaluation for Intra-Word Faults in Word-Oriented RAMs Said Hamdioui1,C

    E-Print Network [OSTI]

    memory cells (i.e., coupling faults (CFs)). In addition faults between cells can be further divided SAMopt: an optimized version of March SAM assuming that intra-word CFs can only occur between physically of the above intra-word CFs also detects intra-word state CF, incorrect read CF, and read destructive CF. Table

  4. Programming Language Support for Writing FaultTolerant Distributed Software \\Lambda

    E-Print Network [OSTI]

    Schlichting, Richard D.

    Programming Language Support for Writing Fault­Tolerant Distributed Software \\Lambda Richard D. Schlichting and Vicraj T. Thomas Abstract Good programming language support can simplify the task of writing a general high­level distributed programming language is augmented with mechanisms for fault tolerance

  5. A Probability Extension of PCA to Detect and Diagnose Sensor Faults in Air Handling Units 

    E-Print Network [OSTI]

    Li, Z.

    2011-01-01

    Due to sensor faults, it is a challenge to successfully detect and diagnose component faults in HVAC systems. The Principal Component Analysis (PCA) method has become a popular method to tackle this problem in recent years, but PCA is not capable...

  6. Fault detection and isolation in aircraft gas turbine engines. Part 1: underlying concept

    E-Print Network [OSTI]

    Ray, Asok

    307 Fault detection and isolation in aircraft gas turbine engines. Part 1: underlying concept: aircraft propulsion, gas turbine engines, fault detection and isolation, statistical pattern recognition 1 INTRODUCTION Performance and reliability of aircraft gas turbine engines gradually deteriorate over the service

  7. Western limits of the Seattle fault zone and its interaction with the Olympic Peninsula, Washington

    E-Print Network [OSTI]

    Boise State University

    of the Tacoma Basin to include the previously termed Dewatto basin and show that the Tacoma fault, the southern- mation of the Olympic Massif and today accommodates north-directed motion. The Tacoma and Dewatto faults margin of the Tacoma Basin, and the Saddle Mountain deformation zone forms the northwestern boundary

  8. Resistive Bridge Fault Modeling,Simulationand Test Generation Vijay R. Sar-Dessai

    E-Print Network [OSTI]

    Walker, Duncan M. "Hank"

    Resistive Bridge Fault Modeling,Simulationand Test Generation Vijay R. Sar-Dessai Intel Corporation.sar-dessai@intel.com Abstract In this work' we develop models of resistive bridging faults and study thefault coverage on ISCAS85 circuits of different test sets using resistive and zero-ohm bridges at different supply voltages

  9. Electrical Simulations of Series and Parallel PV Arc-Faults Jack Flicker and Jay Johnson

    E-Print Network [OSTI]

    Electrical Simulations of Series and Parallel PV Arc-Faults Jack Flicker and Jay Johnson Sandia residential and commercial rooftop fires. The National Electrical Code® (NEC) added section 690.11 to mitigate the electrical behavior of the PV system during series and parallel arc-faults to (a) understand the arcing power

  10. A Framework for Efficient Evaluation of the Fault Tolerance of Deduplicated Storage Systems

    E-Print Network [OSTI]

    Sanders, William H.

    A Framework for Efficient Evaluation of the Fault Tolerance of Deduplicated Storage Systems Eric- lyzing the fault tolerance of deduplicated storage systems. We discuss methods for building models of deduplicated storage systems by analyzing empirical data on a file category basis. We provide an algorithm

  11. Fault Sensitivity Analysis and Reliability Enhancement of Analog-to-Digital Converters

    E-Print Network [OSTI]

    Koren, Israel

    1 Fault Sensitivity Analysis and Reliability Enhancement of Analog-to-Digital Converters Mandeep. The latter also enables an early analysis in the design phase thus eliminating costly redesign. Two types. This type of faults has been known to account for 85% or more failures in digital systems [1], [2]. Since

  12. Modelling the reorientation of sea-ice faults as the wind changes direction

    E-Print Network [OSTI]

    Feltham, Daniel

    Modelling the reorientation of sea-ice faults as the wind changes direction Alexander V. WILCHINSKY-1290, USA ABSTRACT. A discrete-element model of sea ice is used to study how a 908 change in wind direction alters the pattern of faults generated through mechanical failure of the ice. The sea-ice domain is 400

  13. Stress evolution and fault interactions before and after the 2008 Great Wenchuan earthquake

    E-Print Network [OSTI]

    Liu, Mian

    Stress evolution and fault interactions before and after the 2008 Great Wenchuan earthquake Gang Keywords: Wenchuan earthquake Coulomb stress Fault interaction Viscoelastoplastic Finite element modeling,000 lives and devastating many cities in the Sichuan province, China. The coseismic stress changes due

  14. Stress evolution of the San Andreas fault system: Recurrence interval versus locking depth

    E-Print Network [OSTI]

    Smith-Konter, Bridget

    Stress evolution of the San Andreas fault system: Recurrence interval versus locking depth Bridget by stress that has accumulated in the upper locked portion of the crust. The present-day stress accumulation rate on any given fault segment is fairly well resolved by current geodetic measurements. Model stress

  15. Stress Drop during Earthquakes: Effect of Fault Roughness Scaling by Thibault Candela, Franois Renard,*

    E-Print Network [OSTI]

    Schmittbuhl, Jean

    Stress Drop during Earthquakes: Effect of Fault Roughness Scaling by Thibault Candela, François parameter of static stress drop during an earthquake is related to the scaling properties of the fault and focusing on elastic deformation of the topography, which is the dominant mode at large scales, the stress

  16. Journal of Power Sources 165 (2007) 267278 A Bayesian network fault diagnostic system for proton

    E-Print Network [OSTI]

    Simões, Marcelo Godoy

    2007-01-01

    considers the effects of different types of faults on a proton exchange membrane fuel cell model (PEMFC­probabilistic structure) is used to execute the diagnosis of fault causes in the PEMFC model based on the effects observed in proton exchange membrane fuel cell (PEMFC) technology have made them commercially avail- able

  17. Electromagnetic detection of plate hydration due to bending faults at the Middle America Trench

    E-Print Network [OSTI]

    Constable, Steve

    images show that the extensive network of trench parallel normal faults penetrates the entire oceanic bending faults on the incoming oceanic plate of the Middle America Trench offshore Nicaragua have been observed to penetrate to mantle depths, suggesting a permeable pathway for hydration of the crust

  18. Evolution of vertical faults at an extensional plate boundary, southwest Iceland

    E-Print Network [OSTI]

    Kattenhorn, Simon

    Evolution of vertical faults at an extensional plate boundary, southwest Iceland James V. Grant1 Abstract Vertical faults having both opening and vertical displacements are common in southwest Iceland of both oblique and normal spreading in southwest Iceland. Individual fracture segments are commonly

  19. Reliability analysis of static and dynamic fault-tolerant systems subject to probabilistic

    E-Print Network [OSTI]

    Sun, Yan Lindsay

    Reliability analysis of static and dynamic fault-tolerant systems subject to probabilistic common Dartmouth, Massachusetts, USA 2 University of Rhode Island, Kingston, Rhode Island, USA 3 Applied Materials for publication on 8 October 2009. DOI: 10.1243/1748006XJRR260 Abstract: Fault-tolerant systems designed

  20. A frequency weighted approach to robust fault reconstruction and F. Crusca

    E-Print Network [OSTI]

    Aldeen, Mohammad

    is based on shaping the map from disturbance inputs to the fault es- timation error through frequency, these disturbances are assumed to be the output of a filter (with the previously mentioned frequency characteristicsA frequency weighted approach to robust fault reconstruction C.P. Tan and F. Crusca and M. Aldeen

  1. Differential Fault Attack on the PRINCE Block Ling Song, Lei Hu

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Differential Fault Attack on the PRINCE Block Cipher Ling Song, Lei Hu State Key Laboratory {lsong,hu}@is.ac.cn Abstract. PRINCE is a new lightweight block cipher proposed at the ASIACRYPT'2012. Key words: lightweight cipher, PRINCE block cipher, differential fault attack 1 Introduction The idea

  2. An empirical study of faults in late propagation clone genealogies Liliane Barbour1

    E-Print Network [OSTI]

    Zou, Ying

    An empirical study of faults in late propagation clone genealogies Liliane Barbour1 , Foutse Khomh2 has an effect on the fault proneness of specific types of late propagation genealogies. Lastly, we can February 2012; Revised 21 January 2013; Accepted 15 March 2013 KEY WORDS: clone genealogies; late

  3. Parametric Study of PV Arc-Fault Generation Methods and Analysis of Conducted DC Spectrum

    E-Print Network [OSTI]

    Parametric Study of PV Arc-Fault Generation Methods and Analysis of Conducted DC Spectrum Jay photovoltaic (PV) direct current (DC) arc- fault detectors use the frequency content of the PV system to detect by different PV arcs in the field. In this investigation, we (a) discuss the differences in establishing

  4. Brittle Fault Chronology of New York City (NYC) Charles Merguerian, Geology Department, Hofstra University, Hempstead, NY 11549

    E-Print Network [OSTI]

    Merguerian, Charles

    Brittle Fault Chronology of New York City (NYC) Charles Merguerian, Geology Department, Hofstra This Abstract: Merguerian, Charles, 2004a, Brittle fault chronology of New York City (NYC): Geological Society

  5. Detection and diagnosis of faults and energy monitoring of HVAC systems with least-intrusive power analysis

    E-Print Network [OSTI]

    Luo, Dong, 1966-

    2001-01-01

    Faults indicate degradation or sudden failure of equipment in a system. Widely existing in heating, ventilating, and air conditioning (HVAC) systems, faults always lead to inefficient energy consumption, undesirable indoor ...

  6. A hybrid system for fault detection and sensor fusion based on fuzzy clustering and artificial immune systems 

    E-Print Network [OSTI]

    Jaradat, Mohammad Abdel Kareem Rasheed

    2007-04-25

    In this study, an efficient new hybrid approach for multiple sensors data fusion and fault detection is presented, addressing the problem with possible multiple faults, which is based on conventional fuzzy soft clustering and artificial immune...

  7. Grain-scale Comminution and Alteration of Arkosic Rocks in the Damage Zone of the San Andreas Fault at SAFOD 

    E-Print Network [OSTI]

    Heron, Bretani

    2012-02-14

    Spot core from the San Andreas Fault Observatory at Depth (SAFOD) borehole provides the opportunity to characterize and quantify damage and mineral alteration of siliciclastics within an active, large-displacement plate-boundary fault zone. Deformed...

  8. Scales Depencence of Fracture Density and Fabric in the Damage Zone of a Large Displacement Continental Transform Fault 

    E-Print Network [OSTI]

    Ayyildiz, Muhammed

    2012-08-28

    Characterization of fractures in an arkosic sandstone from the western damage zone of the San Andreas Fault (SAF) at San Andreas Fault Observatory at Depth (SAFOD) was used to better understand the origin of damage and to determine the scale...

  9. Fault tree synthesis for software design analysis of PLC based safety-critical systems

    SciTech Connect (OSTI)

    Koo, S. R.; Cho, C. H. [Corporate R and D Inst., Doosan Heavy Industries and Construction Co., Ltd., 39-3, Seongbok-Dong, Yongin-Si, Gyeonggi-Do 449-795 (Korea, Republic of); Seong, P. H. [Dept. of Nuclear and Quantum Engineering, Korea Advanced Inst. of Science and Technology, 373-3 Guseong-dong, Yuseong-gu, Daejeon, 305-701 (Korea, Republic of)

    2006-07-01

    As a software verification and validation should be performed for the development of PLC based safety-critical systems, a software safety analysis is also considered in line with entire software life cycle. In this paper, we propose a technique of software safety analysis in the design phase. Among various software hazard analysis techniques, fault tree analysis is most widely used for the safety analysis of nuclear power plant systems. Fault tree analysis also has the most intuitive notation and makes both qualitative and quantitative analyses possible. To analyze the design phase more effectively, we propose a technique of fault tree synthesis, along with a universal fault tree template for the architecture modules of nuclear software. Consequently, we can analyze the safety of software on the basis of fault tree synthesis. (authors)

  10. Growth of normal faults in multilayer sequences: A 3D seismic case study from the Egersund Basin, Norwegian North Sea

    E-Print Network [OSTI]

    Fossen, Haakon

    Accepted 7 August 2013 Available online 14 August 2013 Keywords: Salt tectonics Fault reactivation Throw the structural style and evolution of a salt-influenced, extensional fault array in the Egersund Basin (Norwegian and growth, suggesting an evolution of (1) initial syn-sedimentary fault growth contemporaneous with salt

  11. Interseismic deformation and creep along the central section of the North Anatolian Fault (Turkey): InSAR observations

    E-Print Network [OSTI]

    Fialko, Yuri

    Interseismic deformation and creep along the central section of the North Anatolian Fault (Turkey the central section of the North Anatolian Fault (NAF) in Turkey using interferometric synthetic aperture along the central section of the North Anatolian Fault (Turkey): InSAR observations and implications

  12. Interseismic deformation and creep along the central section of the North Anatolian Fault (Turkey): InSAR observations

    E-Print Network [OSTI]

    Sandwell, David T.

    Interseismic deformation and creep along the central section of the North Anatolian Fault (Turkey Anatolian Fault (NAF) in Turkey using interferometric synthetic aperture radar data from the Advanced Land Anatolian Fault (Turkey): InSAR observations and implications for rate-and-state friction properties, J

  13. Off-fault plasticity and earthquake rupture dynamics: 1. Dry materials or neglect of fluid pressure changes

    E-Print Network [OSTI]

    Off-fault plasticity and earthquake rupture dynamics: 1. Dry materials or neglect of fluid pressure an explicit dynamic finite element procedure. A Mohr-Coulomb type elastic-plastic description describes-fault plasticity during dynamic rupture. Those include the angle with the fault of the maximum compressive

  14. Simulation of a flexible wind turbine response to a grid fault Anca D. Hansen*, Nicolaos A. Cutululis*, Poul Srensen*,

    E-Print Network [OSTI]

    Simulation of a flexible wind turbine response to a grid fault Anca D. Hansen*, Nicolaos A of a wind turbine. Grid faults generate transients in the generator electromagnetic torque, which are propagated in the wind turbine, stressing its mechanical components. Grid faults are normally simulated

  15. U.S.Geological Survey Grant No. 01HQGR0018 EARTHQUAKE POTENTIAL OF MAJOR FAULTS OFFSHORE SOUTHERN CALIFORNIA

    E-Print Network [OSTI]

    Goldfinger, Chris

    U.S.Geological Survey Grant No. 01HQGR0018 EARTHQUAKE POTENTIAL OF MAJOR FAULTS OFFSHORE SOUTHERN;U.S.Geological Survey Grant No. 01HQGR0018 EARTHQUAKE POTENTIAL OF MAJOR FAULTS OFFSHORE SOUTHERN Major active faults offshore southern California are poorly known with respect to slip-rates and seismic

  16. Fault-Tolerance of Embedded Systems with Automotive Applications Ratnesh Kumar, Dept. of Elec. & Comp. Eng., Iowa State Univ. (ISU)

    E-Print Network [OSTI]

    Rajkumar, Ragunathan "Raj"

    Fault-Tolerance of Embedded Systems with Automotive Applications Ratnesh Kumar, Dept. of Elec of operation. New approaches are needed for fault tolerance of safety critical automotive applications. We specs to detect software (component) faults. 2. System (= software + computing-platform + plant) level

  17. Accelerated Life Testing of PV Arc-Fault Detectors Jay Johnson, Michael Neilsen, Paul Vianco, N. Rob Sorensen,

    E-Print Network [OSTI]

    interrupters (AFCIs) to be incorporated into photovoltaic (PV) systems to prevent fires. Some manufacturers-fault prevention devices. Index Terms -- photovoltaic systems, arc-fault detectors, accelerated life testing on the photovoltaic (PV) system. While there has been extensive work to create functionally robust arc-fault detectors

  18. What's Wrong With Fault Injection As A Benchmarking Tool? This paper attempts to solidify the technical issues

    E-Print Network [OSTI]

    Koopman, Philip

    as a tool for measuring the dependability of general-purpose software systems. While direct fault injection are not designed in a way that makes injection of faults directly into a module under test relevantWhat's Wrong With Fault Injection As A Benchmarking Tool? Abstract This paper attempts to solidify

  19. Appears in the International Conference on Dependable Systems and Networks, 2003 1 Compiler-directed Program-fault Coverage

    E-Print Network [OSTI]

    : We present a new approach that uses compiler- directed fault-injection for coverage testing code in two ways: to direct fault injection to occur at appropriate points during execution analyses to direct fault injection and measure the resulting coverage of recovery code. Our technique

  20. Investigation of expert system application to spacecraft power system control

    SciTech Connect (OSTI)

    Pistole, C.; Bein, J.

    1984-08-01

    This paper addresses the application of expert systems to spacecraft power system control through investigation of two salient technical issues. These are the maximum speed of an expert system, and interaction between the expert system and transient phenomena. The basis of this discussion will be test data obtained through development of the Fault Isolation Expert System (FIES) at Martin Marietta Aerospace Denver. The expert system was tested to determine the minimum time required to clear a power system fault. This response time will be compared to conventional fault handling techniques, and analyzed to determine the maximum bandwidth of the system to be controlled. The second issue to be investigated is the relationship between expert system speed and power system transients. Specifically, FIES is intended to deal with quasi steady state inputs only. Therefore, expert system inputs must be filtered to eliminate the interaction between the expert system and transient phenomena. This paper will discuss the considerations involved in the tailoring of inputs.