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Note: This page contains sample records for the topic "reverse fault rectangles" from the National Library of EnergyBeta (NLEBeta).
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1

A Regression Algorithm for the Smart Prognosis of a Reversed Polarity Fault in a Photovoltaic Generator  

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

2

A reverse osmosis laboratory plant for experimenting with fault-tolerant control  

Science Journals Connector (OSTI)

A test bed for research and teaching in fault-tolerant control (FTC) systems is presented. The laboratory plant is based on an industrial reverse osmosis desalination plant equipped with standardized components, which introduces more realism and robustness ...

A. Gambier; T. Miksch; E. Badreddin

2009-06-01T23:59:59.000Z

3

Reverse Computation for Rollback-based Fault Tolerance in Large Parallel Systems  

SciTech Connect

Reverse computation is presented here as an important future direction in addressing the challenge of fault tolerant execution on very large cluster platforms for parallel computing. As the scale of parallel jobs increases, traditional checkpointing approaches suffer scalability problems ranging from computational slowdowns to high congestion at the persistent stores for checkpoints. Reverse computation can overcome such problems and is also better suited for parallel computing on newer architectures with smaller, cheaper or energy-efficient memories and file systems. Initial evidence for the feasibility of reverse computation in large systems is presented with detailed performance data from a particle simulation scaling to 65,536 processor cores and 950 accelerators (GPUs). Reverse computation is observed to deliver very large gains relative to checkpointing schemes when nodes rely on their host processors/memory to tolerate faults at their accelerators. A comparison between reverse computation and checkpointing with measurements such as cache miss ratios, TLB misses and memory usage indicates that reverse computation is hard to ignore as a future alternative to be pursued in emerging architectures.

Perumalla, Kalyan S [ORNL; Park, Alfred J [ORNL

2013-01-01T23:59:59.000Z

4

Overpressure prediction by mean total stress estimate using well logs for compressional environments with strike-slip or reverse faulting stress state  

E-Print Network (OSTI)

-dimensional compaction theory and depend on a relationship between porosity and vertical effective stress. Strike-slip or reverse faulting environments especially require a different way to determine pore-pressure, since the overburden is not the maximum stress...

Ozkale, Aslihan

2007-04-25T23:59:59.000Z

5

Rectangle Free Coloring of Grids  

E-Print Network (OSTI)

A two-dimensional \\emph{grid} is a set $\\Gnm = [n]\\times[m]$. A grid $\\Gnm$ is \\emph{$c$-colorable} if there is a function $\\chi_{n,m}: \\Gnm \\to [c]$ such that there are no rectangles with all four corners the same color. We address the following question: for which values of $n$ and $m$ is $\\Gnm$ $c$-colorable? This problem can be viewed as a bipartite Ramsey problem and is related to a the Gallai-Witt theorem (also called the multidimensioanl Van Der Waerden's Theorem). We determine (1) \\emph{exactly} which grids are 2-colorable, (2) \\emph{exactly} which grids are 3-colorable, and (3) (assuming a conjecture) \\emph{exactly} which grids are 4-colorable. We use combinatorics, finite fields, and tournament graphs.

Fenner, Stephen; Glover, Charles; Purewal, Semmy

2010-01-01T23:59:59.000Z

6

The ERE of the "Red Rectangle" revisited  

E-Print Network (OSTI)

We present in this paper high signal-to-noise long-slit optical spectra of the Extended Red Emission (ERE) in the "Red Rectangle" (RR) nebula. These spectra, obtained at different positions in the nebula, reveal an extremely complex emission pattern on top of the broad ERE continuum. It is well known that three features converge at large distance from the central object, in wavelength and profile to the diffuse interstellar bands (DIBs) at 5797, 5849.8 and 6614 ang., (e.g. Sarre et al., 1995). In this paper we give a detailed inventory of all spectral subfeatures observed in the 5550--6850 ang. spectral range. Thanks to our high S/N spectra, we propose 5 new features in the RR that can be associated with DIBs. For the 5550--6200 ang. spectral range our slit position was on top of the NE spike of the X shaped nebula. A detailed description of the spatial profile-changes is given of the strongest features revealing that even far out in the nebula at 24 arcsec from the central star, there remains a small shift in wavelength of 1 respectively 2 ang between the ERE subfeatures and the DIB wavelengths of 5797.11 and 5849.78 ang.

Hans Van Winckel; Martin Cohen; Ted R. Gull

2002-04-26T23:59:59.000Z

7

Rectilinear Glass-Cut Dissections of Rectangles to Squares  

E-Print Network (OSTI)

Rectilinear Glass-Cut Dissections of Rectangles to Squares Jurek Czyzowicz§ czyzowic is made using only rectilinear glass-cuts, i.e., vertical or horizontal straight-line cuts separating pieces into two. 1 Introduction A glass-cut of a rectangle is a cut by a straight-line segment

Urrutia, Jorge

8

Effects of burial history, rock ductility and recovery magnitude on inversion of normal faulted strata  

E-Print Network (OSTI)

reactivation of the normal faults may occur during coaxial contraction even though such faults are unfavorably oriented assuming typical rock friction behavior and a homogeneous stress state. Localized reverse slip on normal faults is favored when strata...

Kuhle, Nathan John

2012-06-07T23:59:59.000Z

9

Radiated seismic energy based on dynamic rupture models of faulting and Ralph J. Archuleta1  

E-Print Network (OSTI)

Radiated seismic energy based on dynamic rupture models of faulting Shuo Ma1 and Ralph J. Archuleta energy from three hypothetical crustal events, 30° dipping reverse fault, 60° dipping normal fault, and 0.34 MPa for the reverse, normal, and strike-slip faults, respectively. The energy distribution

Archuleta, Ralph

10

Fault finder  

DOE Patents (OSTI)

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.

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

1986-01-01T23:59:59.000Z

11

Reverse osmosis  

Science Journals Connector (OSTI)

Osmosis is a phenomenon which regulates many biological ... in explaining the biological functions which depend on osmosis, but also in creating conditions for reversing it known as reverse osmosis. Reverse osmosis

Sudhakar M Rao

2007-05-01T23:59:59.000Z

12

REVERSE OSMOSIS  

Science Journals Connector (OSTI)

REVERSE OSMOSIS ... Concentration of Apple Juice by Reverse Osmosis at Laboratory and Pilot-Plant Scales ... Concentration of Apple Juice by Reverse Osmosis at Laboratory and Pilot-Plant Scales ...

S. Sourirajan; J. P. Agrawal

1969-01-01T23:59:59.000Z

13

Reverse Osmosis  

Science Journals Connector (OSTI)

Osmosis is a phenomenon which regulates many biological ... in explaining the biological functions which depend on osmosis, but also in creating conditions for reversing it known as reverse osmosis. Reverse osmosis

Sudhakar M. Rao

2011-12-01T23:59:59.000Z

14

Reverse Osmosis  

Science Journals Connector (OSTI)

This chapter provides a survey of reverse osmosis science and technology. It begins with a ... concludes with an account of the principal current reverse osmosis applications.

H. K. Lonsdale

1986-01-01T23:59:59.000Z

15

Software fault avoidance issues  

Science Journals Connector (OSTI)

This article aims to discuss various issues of software fault avoidance. Software fault avoidance aims to produce fault free software through various approaches having the common objective of reducing the number of latent defects in software programs.

Goutam Kumar Saha

2006-11-01T23:59:59.000Z

16

A core-based assessment of the spatial relationship of small faults associated with a basement-controlled, large normal fault in the Hickory Sandstone  

E-Print Network (OSTI)

with reverse-slip, showing associated fault strike, dip polarity and cumulative displacement per foot????????????????????? Page 79 80 81 82 83 84 85 86 87 88 89 xii FIGURE 52 Borehole NNR-8: Distribution of small faults with reverse... they were purged from the ?density? measures???.. 3 Descriptive statistics for sample data (n = 692) of displacement, gouge thickness and corresponding log transforms????????????. 4 Summary statistics for ln displacement of all four grain sizes for a...

Graff, Mitchell C

2006-10-30T23:59:59.000Z

17

Fault Current Limiters  

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

Fault Fault Current Limiters Superconducting & Solid-state Power Equipment Office of Electricity Delivery and Energy Reliability www.oe.energy.gov Office of Electricity Delivery and Energy Reliability, OE-1 U.S. Department of Energy - 1000 Independence Avenue, SW - Washington, DC 20585 Plugging America Into the Future of Power What are FCLs? A fault is an unintentional short circuit, or partial short-circuit, in an electric circuit. A variety of factors such as lightning, downed power lines, or crossed power lines cause faults. During a fault, excessive current-called fault current- flows through the electrical system often resulting in a failure of one section of that system by causing a

18

Method of detecting the direction of arcing faults on power distribution feeders  

E-Print Network (OSTI)

of overcurrent relays, which Journal model is IEEE transactions on Power Delivery is required for distribution system reliability. The traveling wave directionality al- gorithms also require fairly substantial change in voltage for proper operation... is of significant magnitude to cause a current reversal in the case of a reverse fault [18]. 2. Traveling Wave Relaying The need for more accurate and fast detection of fault and direction of very high voltage transmission lines, was the base of invention...

Fernando, W. Anand Krisantha

2012-06-07T23:59:59.000Z

19

Fault Location and Incipient Fault Detection in Distribution Cables.  

E-Print Network (OSTI)

??A set of fault location algorithms for underground medium voltage cables, two incipient fault detection schemes for distribution cables and a state estimation method for (more)

Xu, Zhihan

2011-01-01T23:59:59.000Z

20

DAFT: decoupled acyclic fault tolerance  

Science Journals Connector (OSTI)

Higher transistor counts, lower voltage levels, and reduced noise margin increase the susceptibility of multicore processors to transient faults. Redundant hardware modules can detect such errors, but software transient fault detection techniques are ... Keywords: multicore, speculation, transient fault

Yun Zhang; Jae W. Lee; Nick P. Johnson; David I. August

2010-09-01T23:59:59.000Z

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


21

Solar system fault detection  

DOE Patents (OSTI)

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.

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

1986-01-01T23:59:59.000Z

22

Solar system fault detection  

DOE Patents (OSTI)

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.

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

1984-05-14T23:59:59.000Z

23

Fault Intersection | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Fault Intersection Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Fault Intersection Dictionary.png Fault Intersection: Fault intersections are junctions between normal faults and either transversely oriented strike-slip or oblique-slip faults. Subsurface fluid flow in these areas is enhanced by multiple minor faults that connect the major intersecting structures, forming highly fractured zones or dilational quadrants with increased permeability. Other definitions:Wikipedia Reegle Controlling Structures List of controlling structures typically associated with geothermal

24

Definite Integrals The area under a curve can be approximated by adding up the areas of rectangles.  

E-Print Network (OSTI)

.8 7.84 7.84 [3, 3.5] 3.0 9.0 4.5 [3.5, 6] 5.0 25.0 37.5 sum 51.84 This gives an approximate area of 5111-2-2005 Definite Integrals The area under a curve can be approximated by adding up the areas of rectangles. Example. Approximate the area under y = 1 1 + x3 from x = 0 to x = 1 using 20 equal subintervals

Ikenaga, Bruce

25

Computer hardware fault administration  

DOE Patents (OSTI)

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.

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

2010-09-14T23:59:59.000Z

26

Optimal fault location  

E-Print Network (OSTI)

for the pre-selected time out to pass and initiate reclosing again. If after selected number of attempts of reclosing, fault is still present, breaker lockout is taking place. There will be no more attempts to reclose automatically the breaker again....2: Trip and reclose sequences on a single breaker In the case of breaker lockout the assumption taken by the operators is that fault is permanent. Special order is issued to the maintenance for the breaker to be closed back in 4 again once...

Knezev, Maja

2009-05-15T23:59:59.000Z

27

Optimal fault location  

E-Print Network (OSTI)

for the pre-selected time out to pass and initiate reclosing again. If after selected number of attempts of reclosing, fault is still present, breaker lockout is taking place. There will be no more attempts to reclose automatically the breaker again....2: Trip and reclose sequences on a single breaker In the case of breaker lockout the assumption taken by the operators is that fault is permanent. Special order is issued to the maintenance for the breaker to be closed back in 4 again once...

Knezev, Maja

2008-10-10T23:59:59.000Z

28

Row fault detection system  

DOE Patents (OSTI)

An apparatus, program product and method check for nodal faults in a row of nodes by causing each node in the row to concurrently communicate with its adjacent neighbor nodes in the row. The communications are analyzed to determine a presence of a faulty node or connection.

Archer, Charles Jens (Rochester, MN); Pinnow, Kurt Walter (Rochester, MN); Ratterman, Joseph D. (Rochester, MN); Smith, Brian Edward (Rochester, MN)

2012-02-07T23:59:59.000Z

29

Reverse Osmosis and Ultrafiltration  

Science Journals Connector (OSTI)

Economic comparisons indicate reverse osmosis to be more cost effective than distillation ... membranes, leading to a wider scope of reverse osmosis applications, including the purification of used water ... tran...

Prof. Dr. Anthony Delyannis; Dr. Euridike-Emmy Delyannis

1980-01-01T23:59:59.000Z

30

Reversible logic for supercomputing  

Science Journals Connector (OSTI)

This paper is about making reversible logic a reality for supercomputing. Reversible logic offers a way to exceed certain basic limits on the performance of computers, yet a powerful case will have to be made to justify its substantial development expense. ... Keywords: applications modeling, climate change global warming, computer architecture, quantum dot cellular automata, reversible logic, supercomputing

Erik P. DeBenedictis

2005-05-01T23:59:59.000Z

31

Flow Relationships in Reverse Osmosis  

Science Journals Connector (OSTI)

Flow Relationships in Reverse Osmosis ... Effects of Hydrolysis on Cellulose Acetate Reverse-Osmosis Transport Coefficients ... Effects of Hydrolysis on Cellulose Acetate Reverse-Osmosis Transport Coefficients ...

Ulrich Merten

1963-08-01T23:59:59.000Z

32

Complex Faulting in the Yuha Desert: Implications for Fault Interaction  

E-Print Network (OSTI)

Dibblee. Geology of the Imperial Valley region, California,and tectonics of the Imperial Valley region, California. Innent faults surrounding the Imperial Valley region, southern

Kroll, Kayla Ann

2012-01-01T23:59:59.000Z

33

Fault Mapping | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Fault Mapping Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Fault Mapping Details Activities (2) Areas (2) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Field Techniques Exploration Sub Group: Data Collection and Mapping Parent Exploration Technique: Data Collection and Mapping Information Provided by Technique Lithology: Stratigraphic/Structural: Locates active faults in the area of interest Hydrological: Can reveal whether faults are circulating hydrothermal fluids Thermal: Dictionary.png

34

Major Normal Fault | Open Energy Information  

Open Energy Info (EERE)

Major Normal Fault Major Normal Fault Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Major Normal Fault Dictionary.png Major Normal Fault: Normal faults are structures in which the hanging wall is down dropped along the fault plane relative to the foot wall. They are the predominant type of structure in extensional tectonic environments, but are commonly encountered in a number of geologic settings. Other definitions:Wikipedia Reegle Controlling Structures List of controlling structures typically associated with geothermal systems: Major Normal Fault Termination of a Major Normal Fault Stepover or Relay Ramp in Normal Fault Zones Apex or Salient of Normal Fault Fault Intersection Accommodation Zone Displacement Transfer Zone Pull-Apart in Strike-Slip Fault Zone

35

The character and reactivation history of the southern extension of the seismically active ClarendonLinden Fault System, western New York State  

Science Journals Connector (OSTI)

Integration of 11 types of data sets enabled us to determine the location, character and fault history of the southern extension of the ClarendonLinden Fault System (CLF) in southwestern New York State. The data sets utilized include detailed stratigraphic and fracture measurements at more than 1000 sites, soil gas anomalies, seismic reflection profiles, well logs and lineaments on air photos, topographic maps, Landsat and SLAR images. The seismically active CLF consists of as many as 10 parallel, segmented faults across the fault system. The fault segments are truncated by NW-striking cross-strike discontinuities (CSDs). The faults of the CLF and intersecting \\{CSDs\\} form fault blocks that have semi-independent subsidence and uplift histories. East-dipping reflectors in the Precambrian basement indicate the southward continuation of thrusts of the intra-Grenvillian ElzevirFrontenac Boundary Zone. These thrusts were reactivated during Iapetan rifting as normal (listric) growth faults. In Ordovician Black River to Trenton time, the southern CLF segments experienced a second phase of growth fault activity, with faults displaying a cumulative stratigraphic throw of as much as ?170 m. Thrusting on the same east-dipping Precambrian reflectors typified the CLF in Taconic (post-Trenton) times. Detailed comparisons among the fault segments show that the fault activity in Silurian and Devonian times generally alternated between the western and central main faults. In Late Devonian time, the fault motion reversed from down-on-the-east to down-on-the-west about the time the Appalachian Basin axis passed across the CLF in its westward migration. The deep Precambrian faults of the CLF were thus reactivated as the Appalachian Basin developed in Acadian times. Finally, the CLF thrust fault imaged on seismic line CLF-1 offsets all bedrock (Devonian) units; thus, significant motion occurred along this fault during Late Acadian, or more likely, Alleghanian time.

Robert D. Jacobi; John Fountain

2002-01-01T23:59:59.000Z

36

Reversible Acid Gas Capture  

SciTech Connect

Pacific Northwest National Laboratory scientist David Heldebrant demonstrates how a new process called reversible acid gas capture works to pull carbon dioxide out of power plant emissions.

Dave Heldebrant

2009-08-01T23:59:59.000Z

37

Reversible Acid Gas Capture  

ScienceCinema (OSTI)

Pacific Northwest National Laboratory scientist David Heldebrant demonstrates how a new process called reversible acid gas capture works to pull carbon dioxide out of power plant emissions.

Dave Heldebrant

2012-12-31T23:59:59.000Z

38

Definition: Enhanced Fault Protection | Open Energy Information  

Open Energy Info (EERE)

Enhanced Fault Protection Enhanced Fault Protection Enhanced fault protection requires higher precision and greater discrimination of fault location and type with coordinated measurement among multiple devices. For distribution applications, these systems will detect and isolate faults without full-power re-closing, reducing the frequency of through-fault currents. Using high resolution sensors and fault signatures, these systems can better detect high impedance faults. For transmission applications, these systems will employ high speed communications between multiple elements (e.g., stations) to protect entire regions, rather than just single elements. They will also use the latest digital techniques to advance beyond conventional impedance relaying of transmission lines.[1] Related Terms

39

Intelligent fault diagnosis of power transmission line; -.  

E-Print Network (OSTI)

??This dissertation presents the application of recent intelligent newlinetechniques for fault diagnosis in electrical power transmission line Fault newlinesection identification classification and location are the (more)

Malathi, V

2014-01-01T23:59:59.000Z

40

Transition-fault test generation  

E-Print Network (OSTI)

large to store in the memory of the tester. The proposed methods of test generation utilize stuck-at-fault tests to create transition-fault test sets of a smaller size. Greedy algorithms are used in the generation of both the stuck...

Cobb, Bradley Douglas

2013-02-22T23:59:59.000Z

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


41

Earthquake Fault Studies in Japan  

Science Journals Connector (OSTI)

17 May 1973 research-article Earthquake Fault Studies in Japan K. Kasahara The paper reviews the current status of earthquake fault studies in Japan, taking the work on the off-Honshu tectonics as an example. Within the Japanese tectonic...

1973-01-01T23:59:59.000Z

42

Observer-based fault detection for nuclear reactors  

E-Print Network (OSTI)

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 ...

Li, Qing, 1972-

2001-01-01T23:59:59.000Z

43

Synthesis of reversible sequential elements  

Science Journals Connector (OSTI)

To construct a reversible sequential circuit, reversible sequential elements are required. This work presents novel designs of reversible sequential elements such as the D latch, JK latch, and T latch. Based on these reversible latches, we construct ... Keywords: Reversible logic, sequential circuits, sequential elements

Min-Lun Chuang; Chun-Yao Wang

2008-01-01T23:59:59.000Z

44

Arc fault detection system  

DOE Patents (OSTI)

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.

Jha, Kamal N. (Bethel Park, PA)

1999-01-01T23:59:59.000Z

45

Hot Pot Detail - Evidence of Quaternary Faulting  

SciTech Connect

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

Lane, Michael

2013-06-27T23:59:59.000Z

46

Hot Pot Detail - Evidence of Quaternary Faulting  

DOE Data Explorer (OSTI)

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

Lane, Michael

47

All Skate, Now Reverse  

E-Print Network (OSTI)

All Skate, Now Reverse is a memoir that consists of personal narratives that are set in or are about my growing up in Nebraska. It is about life and its defining moments, and the collection summons up childhood epiphanies ...

Glover, Angela l.

2008-07-28T23:59:59.000Z

48

Reverse Osmosis Process  

Science Journals Connector (OSTI)

An empirical modeling method has been suggested for the reverse osmosis process. Least-square fitting of data to a third-order polynomial has resulted in the accurate modeling of Du Ponts hollow fiber B-10 m...

Prof. Dr. Anthony Delyannis; Dr. Euridike-Emmy Delyannis

1980-01-01T23:59:59.000Z

49

Reverse Osmosis Membranes  

Science Journals Connector (OSTI)

A bibliography of citations from the U.S. National Technical Information Service data base with 183 abstracts on membranes for reverse osmosis desalination, electro-dialysis desalination and other osmotic desa...

Prof. Dr. Anthony Delyannis; Dr. Euridike-Emmy Delyannis

1980-01-01T23:59:59.000Z

50

Earth-Fault Relay Equipment  

Science Journals Connector (OSTI)

... proving the reliability of the equipment. By Observing the operation of the relays at each substation with faults at selected points, the complete scheme can be put into operation with ...

1944-04-15T23:59:59.000Z

51

Development of secondary faults between en echelon, oblique-slip faults: examples from basement controlled, small-fault systems in the Llano Uplift of central Texas  

E-Print Network (OSTI)

between and oriented oblique to the bounding faults. With increasing displacement on the bounding faults, the system of secondary faults evolves from an Elementary to a Compound, to an Advanced geometry, which includes the formation of secondary... to the primary faults. Synthetic faults form interior to and ahead of the bounding faults, increasing the effective overlap. Displacements on antithetic faults are directly related to changes in displacement on associated bounding faults. Additionally...

Hedgcoxe, Howard Reiffert

2012-06-07T23:59:59.000Z

52

Termination of a Major Normal Fault | Open Energy Information  

Open Energy Info (EERE)

Termination of a Major Normal Fault: Major normal fault terminations or tip-lines sometimes split into multiple closely-spaced faults that result in increased...

53

Reversible collisionless magnetic reconnection  

SciTech Connect

Reversible magnetic reconnection is demonstrated for the first time by means of gyrokinetic numerical simulations of a collisionless magnetized plasma. Growth of a current-driven instability in a sheared magnetic field is accompanied by magnetic reconnection due to electron inertia effects. Following the instability growth, the collisionless reconnection is accelerated with development of a cross-shaped structure of current density, and then all field lines are reconnected. The fully reconnected state is followed by the secondary reconnection resulting in a weakly turbulent state. A time-reversed simulation starting from the turbulent state manifests that the collisionless reconnection process proceeds inversely leading to the initial state. During the reversed reconnection, the kinetic energy is reconverted into the original magnetic field energy. In order to understand the stability of reversed process, an external perturbation is added to the fully reconnected state, and it is found that the accelerated reconnection is reversible when the deviation of the E B streamlines due to the perturbation is comparable with or smaller than a current layer width.

Ishizawa, A.; Watanabe, T.-H. [National Institute for Fusion Science, Toki 509-5292 (Japan)] [National Institute for Fusion Science, Toki 509-5292 (Japan)

2013-10-15T23:59:59.000Z

54

Quaternary faults of west Texas  

SciTech Connect

North- and northwest-striking intermontane basins and associated normal faults in West Texas and adjacent Chihuahua, Mexico, formed in response to Basin and Range tectonism that began about 24 Ma ago. Data on the precise ages of faulted and unfaulted Quaternary deposits are sparse. However, age estimates made on the basis of field stratigraphic relationships and the degree of calcic soil development have helped determine that many of the faults that bound the basin margins ruptured since the middle Pleistocene and that some faults probably ruptured during the Holocene. Average recurrence intervals between surface ruptures since the middle Pleistocene appear to be relatively long, about 10,000 to 100,000 yr. Maximum throw during single rupture events have been between 1 and 3 m. Historic seismicity in West Texas is low compared to seismicity in many parts of the Basin and Range province. The largest historic earthquake, the 1931 Valentine earthquake in Ryan Flat/Lobo Valley, had a magnitude of 6.4 and no reported surface rupture. The most active Quaternary faults occur within the 120-km-long Hueco Bolson, the 70-km-long Red Light Bolson, and the > 200-km-long Salt Basins/Wild Horse Flat/Lobo Valley/Ryan Flat.

Collins, E.W.; Raney, J.A. (Univ. of Texas, Austin, TX (United States). Bureau of Economic Geology)

1993-04-01T23:59:59.000Z

55

Definition: Fault Current Limiter | Open Energy Information  

Open Energy Info (EERE)

Limiter Limiter Jump to: navigation, search Dictionary.png Fault Current Limiter A fault current limiter prevents current in an electrical circuit from exceeding a predetermined level by increasing the electrical impedance of that circuit before the current through the circuit exceeds that level. Fault current limiters are designed so as to minimize the impedance of the circuit under normal conditions to reduce losses, but increase the impedance of the circuit under fault conditions to limit fault current.[1] View on Wikipedia Wikipedia Definition A Fault Current Limiter (FCL) is a device which limits the prospective fault current when a fault occurs (e.g. in a power transmission network). The term includes superconducting devices and non-superconducting devices, however some of the more simple non-superconducting devices (such

56

Definition: Fault Current Limiting | Open Energy Information  

Open Energy Info (EERE)

Limiting Limiting Jump to: navigation, search Dictionary.png Fault Current Limiting Fault current limiting can be achieved through sensors, communications, information processing, and actuators that allow the utility to use a higher degree of network coordination to reconfigure the system to prevent fault currents from exceeding damaging levels. Fault current limiting can also be achieved through the implementation of special stand alone devices known as Fault Current Limiters (FCLs) which act to automatically limit high through currents that occur during faults.[1] Related Terms fault, fault current limiter References ↑ SmartGrid.gov 'Description of Functions' Temp LikeLike UnlikeLike You like this.Sign Up to see what your friends like. late:ISGANAttributionsmart grid,smart grid,smart grid,smart grid,

57

Development of Superconducting AC Fault Current Limiter  

Science Journals Connector (OSTI)

The authors have developed a new superconducting fault current limiter whose impedance during normal operation is very small. During fault conditions, the limiter behaves as a superconducting reactor. The limiter

Daisuke Ito; Eriko Yoneda; Tsutomu Fujioka

1990-01-01T23:59:59.000Z

58

Test on Superconducting AC Fault Current Limiter  

Science Journals Connector (OSTI)

The authors have developed a new superconducting fault current limiter whose impedance during normal operation is very small. During fault conditions, the limiter behaves as a superconducting reactor. The limiter

Daisuke Ito; Eriko S. Yoneda

1990-01-01T23:59:59.000Z

59

Time reversal communication system  

DOE Patents (OSTI)

A system of transmitting a signal through a channel medium comprises digitizing the signal, time-reversing the digitized signal, and transmitting the signal through the channel medium. The channel medium may be air, earth, water, tissue, metal, and/or non-metal.

Candy, James V. (Danville, CA); Meyer, Alan W. (Danville, CA)

2008-12-02T23:59:59.000Z

60

Reverse Coherent Information  

Science Journals Connector (OSTI)

In this Letter we define a family of entanglement distribution protocols assisted by feedback classical communication that gives an operational interpretation to reverse coherent information, i.e., the symmetric counterpart of the well-known coherent information. This leads to the definition of a new entanglement distribution capacity that exceeds the unassisted capacity for some interesting channels.

Ral Garca-Patrn; Stefano Pirandola; Seth Lloyd; Jeffrey H. Shapiro

2009-05-29T23:59:59.000Z

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


61

Reverse Osmosis Optimization  

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

Report assesses techniques for optimizing reverse osmosis (RO) systems to increase RO system performance and water efficiency. It provides a general description of RO systems, the influence of RO systems on water use, and key areas where RO systems can be optimized to reduce water and energy consumption.

62

PREEARTHQUAKE AND POSTEARTHQUAKE CREEP ON THE IMPERIAL FAULT AND THE BRAWLEY FAULT ZONE1  

E-Print Network (OSTI)

(Goulty and others, 1978). The 1979 Imperial Valley earthquake was associated with surface faultingPREEARTHQUAKE AND POSTEARTHQUAKE CREEP ON THE IMPERIAL FAULT AND THE BRAWLEY FAULT ZONE1 By STEPHEN, and 2 years ofsurveys from two nail files suggests that creep events on the Imperial fault 2 to 5 months

Tai, Yu-Chong

63

Millennial slip rate of the Longitudinal Valley fault from river terraces: Implications for convergence across the active suture  

E-Print Network (OSTI)

to the Central Range continental sliver. Citation: Shyu, J. B. H., K. Sieh, J.-P. Avouac, W.-S. Chen, and Y-lateral reverse fault accommodates rapid uplift of the Coastal Range on its hanging wall block [e.g., Yu and Liu

Avouac, Jean-Philippe

64

Fault tolerant supercomputing: a software approach  

Science Journals Connector (OSTI)

Adding fault tolerance to embedded supercomputing applications is becoming an issue of great significance, especially as these applications support critical parts of our everyday life in the modern "Information Society". To this end, a software middleware ... Keywords: embedded parallel and distributed systems, fault-tolerant communication, high performance computing, maintainability, separation of design concerns, software fault tolerance, user-specified recovery strategies

E. Verentziotis; T. Varvarigou; D. Vergados; G. Deconinck

2001-01-01T23:59:59.000Z

65

Sustained Self-Reversal in the Reversed-Field Pinch  

Science Journals Connector (OSTI)

Spontaneous reversal of the toroidal field in a reversed-field pinch as a result of low-? (small J?J?) resisitive kink mode activity is investigated with use of a three-dimensional magnetohydrodynamics code. Helical and three-dimensional steady reversed states are obtained. In three dimensions quasisteady fluctuating states are observed above a critical value of the pinch parameter ?.

A. Y. Aydemir and D. C. Barnes

1984-03-12T23:59:59.000Z

66

Fault-tolerant TCP mechanisms  

E-Print Network (OSTI)

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 deliver. Throughputs and fail...

Satapati, Suresh Kumar

2012-06-07T23:59:59.000Z

67

Landsat TM processing in the investigation of active fault zones, South Lajas Valley Fault Zone and Cerro Goden Fault Zone as an example  

E-Print Network (OSTI)

unrecognized east- west trending fault crossing an alluvial fan on the southern side of the Lajas Valley, SWLandsat TM processing in the investigation of active fault zones, South Lajas Valley Fault Zone and geophysical data, to delineate the lateral extent of two fault zones, the South Lajas Valley Fault Zone (SLVFZ

Gilbes, Fernando

68

Colloidal fouling of reverse osmosis membranes  

E-Print Network (OSTI)

the rate of fouling of reverse osmosis membranes treating32, 127-135. fouling of reverse osmosis membranes." Buros,Colloidal fouling of reverse osmosis membranes." J. Colloid

Elimelech, Menachem

1994-01-01T23:59:59.000Z

69

Reversible Fuel Cells Workshop | Department of Energy  

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

Reversible Fuel Cells Workshop Reversible Fuel Cells Workshop The National Renewable Energy Laboratory hosted a workshop addressing the current state-of-the-art of reversible fuel...

70

Neotectonics of Panama. I. Major fault systems  

SciTech Connect

The direction and rate of relative plate motion across the Caribbean-Nazca boundary in Panama is poorly known. This lack of understanding can be attributed to diffuse seismicity; lack of well constrained focal mechanisms from critical areas; and dense tropical vegetation. In order to better understand the relation of plate motions to major fault systems in Panama, the authors have integrated geologic, remote sensing, earthquake and UTIG marine seismic reflection data. Three areas of recent faulting can be distinguished in Panama and its shelf areas; ZONE 1 of eastern Panama consists of a 70 km wide zone of 3 discrete left-lateral strike-slip faults (Sanson Hills, Jaque River, Sambu) which strike N40W and can be traced as continuous features for distances of 100-150 km; ZONE 2 in central Panama consists of a diffuse zone of discontinuous normal(.) faults which range in strike from N40E, N70E; ZONE 3 in western Panama consists of a 60 km wide zone of 2 discrete, left-lateral(.) strike-slip faults which strike N60W and can be traced as continuous features for distances of 150 km; ZONE 3 faults appear to be continuous with faults bounding the forearc Teraba Trough of Costa Rica. The relation of faults of ZONE 3 to faults of ZONE 2 and a major fault bounding the southern Panama shelf is unclear.

Corrigan, J.; Mann, P.

1985-01-01T23:59:59.000Z

71

Reversal bending fatigue testing  

SciTech Connect

Embodiments for apparatuses for testing reversal bending fatigue in an elongated beam are disclosed. Embodiments are configured to be coupled to first and second end portions of the beam and to apply a bending moment to the beam and create a pure bending condition in an intermediate portion of the beam. Embodiments are further configured to cyclically alternate the direction of the bending moment applied to the beam such that the intermediate portion of the beam cyclically bends in opposite directions in a pure bending condition.

Wang, Jy-An John; Wang, Hong; Tan, Ting

2014-10-21T23:59:59.000Z

72

Apex or Salient of Normal Fault | Open Energy Information  

Open Energy Info (EERE)

Apex or Salient of Normal Fault Apex or Salient of Normal Fault Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Apex or Salient of Normal Fault Dictionary.png Apex or Salient of Normal Fault: Normal faults may intersect in the subsurface to form a fault apex or salient. Apices or salients of normal faults account for 3% of structural controls in the Great Basin. Other definitions:Wikipedia Reegle Controlling Structures List of controlling structures typically associated with geothermal systems: Major Normal Fault Termination of a Major Normal Fault Stepover or Relay Ramp in Normal Fault Zones Apex or Salient of Normal Fault Fault Intersection Accommodation Zone Displacement Transfer Zone Pull-Apart in Strike-Slip Fault Zone Intrusion Margins and Associated Fractures Stratigraphic Boundaries

73

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

E-Print Network (OSTI)

measured at feeder substations and the fault distance algorithm was tested using data obtained by staging faults on a model of an overhead feeder using EMTP/ATP simulation. The results obtained from the tests were promising. A simple illustration...

Andoh, Kwame Sarpong

2012-06-07T23:59:59.000Z

74

Optimal power flow considering fault current level constraints and fault current limiters  

Science Journals Connector (OSTI)

Abstract The aim of this paper is to present a novel method to dispatch the active generation power properly in the power system while incorporating fault current levels as constraints for the optimization problem. Due to the limited capacity of protective devices such as circuit breakers, allocating active power without considering fault current levels can probably lead to fault currents exceeding the rating of these devices. Hence restricting the fault current levels to an allowable amount while minimizing a specified objective function seems to be necessary. In a number of cases even the appropriate allocation of active power is not able to reduce the fault current levels to the permitted amount therefore using fault current limiters (FCL) is unavoidable. In this paper also a planning scheme is presented for the location and sizing of fault current limiters and the effect of fault current limiters on the objective functions is investigated.

Amirhossein Khazali; Mohsen Kalantar

2014-01-01T23:59:59.000Z

75

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

E-Print Network (OSTI)

substation. One-line diagram of a distribution system with two feeders. Typical high impedance fault, showing little or no change in phase voltage due to the fault. . Phase voltage and high frequency current component during a staged high impedance... substation. One-line diagram of a distribution system with two feeders. Typical high impedance fault, showing little or no change in phase voltage due to the fault. . Phase voltage and high frequency current component during a staged high impedance...

Benner, Carl Lee

2012-06-07T23:59:59.000Z

76

Summary of Superconducting Fault Current Limiter Technology  

Science Journals Connector (OSTI)

In recent years, superconducting fault current limiter (SFCL) has become one of the forefront topics of current-limiting technology in the world. In this...

Linmang Wang; Pengzan Jiang; Dada Wang

2012-01-01T23:59:59.000Z

77

Research on Fault Analysis and Fault-Tolerant Control of EV/HEV Powertrain  

E-Print Network (OSTI)

presents research works in the topics of fault analysis and fault tolerant control of an electric vehicle mechanism (transition strategy) at sensor fault occurrence. Index Terms--Electric vehicle, induction motor-tolerant AC motor drives in industrial applications [9-10- 41]. II. ELECTRIC VEHICLE POWERTRAIN COMPONENTS

Brest, Université de

78

Structural Heterogeneity and Permeability in Faulted Eolian Sandstone: Implications for Subsurface Modeling of Faults  

Science Journals Connector (OSTI)

...fault that could be hydraulically significant in a reservoir...Reynolds and E. D. Dolly, eds., Mesozoic paleogeography...Jones, 1998, Fault-controlled communication in the...Reynolds and E. D. Dolly, eds., Mesozoic paleogeog-raphy...Jones, 1998, Fault-controlled communication in theSleipner...

Zoe K. Shipton; James P. Evans; Kim R. Robeson; Craig B. Forster; Stephen Snelgrove

79

Reverse slapper detonator  

DOE Patents (OSTI)

A reverse slapper detonator (70), and methodology related thereto, are provided. The detonator (70) is adapted to be driven by a pulse of electric power from an external source (80). A conductor (20) is disposed along the top (14), side (18), and bottom (16) surfaces of a sheetlike insulator (12). Part of the conductor (20) comprises a bridge (28), and an aperture (30) is positioned within the conductor (20), with the bridge (28) and the aperture (30) located on opposite sides of the insulator (12). A barrel (40) and related explosive charge (50) are positioned adjacent to and in alignment with the aperture (30), and the bridge (28) is buttressed with a backing layer (60). When the electric power pulse vaporizes the bridge (28), a portion of the insulator (12) is propelled through the aperture (30) and barrel (40), and against the explosive charge (50), thereby detonating it.

Weingart, Richard C. (Livermore, CA)

1990-01-01T23:59:59.000Z

80

Reverse Osmosis Optimization  

SciTech Connect

This technology evaluation was prepared by Pacific Northwest National Laboratory on behalf of the U.S. Department of Energys Federal Energy Management Program (FEMP). The technology evaluation assesses techniques for optimizing reverse osmosis (RO) systems to increase RO system performance and water efficiency. This evaluation provides a general description of RO systems, the influence of RO systems on water use, and key areas where RO systems can be optimized to reduce water and energy consumption. The evaluation is intended to help facility managers at Federal sites understand the basic concepts of the RO process and system optimization options, enabling them to make informed decisions during the system design process for either new projects or recommissioning of existing equipment. This evaluation is focused on commercial-sized RO systems generally treating more than 80 gallons per hour.

McMordie Stoughton, Kate; Duan, Xiaoli; Wendel, Emily M.

2013-08-26T23:59:59.000Z

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


81

Properly apply reverse osmosis  

SciTech Connect

Reverse osmosis (RO) is a water purification technique used to reduce the loading of dissolved solids in solution. The popularity of RO for treating boiler feedwater is growing because of the rising cost of ion-exchange-based demineralization as well as safety concerns associated with handling acid and caustic. A properly designed and operated RO-based boiler-feedwater-treatment system can reduce the load to, and costs associated with, ion exchange demineralization. This article discusses RO feedwater quality recommendations, pretreatment techniques, and system monitoring necessary to achieve optimum RO system performance in the most cost-effective manner. Regardless of the application--whether it is the treatment of boiler feedwater, industrial wastewater, or process water--the approach to pretreatment and the other design and operating guidance offered here remains the same.

Kucera, J.

1997-02-01T23:59:59.000Z

82

Sandia National Laboratories: reverse osmosis  

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

reverse osmosis ECIS-UNM: Biomimetic Membranes for Water Purification On February 20, 2013, in Advanced Materials Laboratory, Energy Efficiency, Facilities, Global Climate &...

83

Low-cost motor drive embedded fault diagnosis systems  

E-Print Network (OSTI)

Electric motors are used widely in industrial manufacturing plants. Bearing faults, insulation faults, and rotor faults are the major causes of electric motor failures. Based on the line current analysis, this dissertation mainly deals with the low...

Akin, Bilal

2009-05-15T23:59:59.000Z

84

A transformer type fault current limiter with spark gap  

Science Journals Connector (OSTI)

A novel fault current limiter (FCL) is proposed in this paper. ... of the capacitor. During the short-circuit faults, the FCL resonantly produces a high impedance in the fault circuit after the breakdown of the s...

Zhang Xiaoqing; Ming Li

2010-06-01T23:59:59.000Z

85

Accurate resistive bridge fault modeling, simulation, and test generation  

E-Print Network (OSTI)

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 circuits. The results...

Sar-Dessai, Vijay Ramesh

2012-06-07T23:59:59.000Z

86

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

E-Print Network (OSTI)

Recent studies have shown that a 27 km section of the Meers Fault was reactivated during Holocene time. Although these studies have proven the occurrence of recent fault activity, many basic characteristics of the faulting remain unresolved...

Burrell, Richard Dennis

2012-06-07T23:59:59.000Z

87

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

E-Print Network (OSTI)

and microstructural study focused on structural domains before, within, and after the fault bend on both sides of the fault. Subsidiary fault fabrics are similar in all domains outside the bend, which suggests a steady state fracture density and orientation...

Becker, Andrew 1987-

2012-08-15T23:59:59.000Z

88

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

E-Print Network (OSTI)

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...

Christie, Michael Wayne

2007-12-18T23:59:59.000Z

89

An Assessment of Fault Current Limiter Testing Requirements ...  

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

An Assessment of Fault Current Limiter Testing Requirements An Assessment of Fault Current Limiter Testing Requirements The U.S. Department of Energy's (DOE) Office of Electricity...

90

fault diagnosis of a high voltage transmission line using waveform ...  

E-Print Network (OSTI)

Oct 4, 2013 ... FAULT DIAGNOSIS OF A HIGH VOLTAGE TRANSMISSION LINE USING ... Fault types such as single line to ground, line to line, double line to...

Ripunjoy Phukan

2013-10-04T23:59:59.000Z

91

Development of a bridge fault extractor tool  

E-Print Network (OSTI)

Bhat, B. Tech, Indian Institute of Technology, Bombay Co-Chairs of Advisory Committee: Dr. D. M. H. Walker Dr. Jiang Hu Bridge fault extractors... Bhat, B. Tech, Indian Institute of Technology, Bombay Co-Chairs of Advisory Committee: Dr. D. M. H. Walker Dr. Jiang Hu Bridge fault extractors...

Bhat, Nandan D.

2005-02-17T23:59:59.000Z

92

FaultLocal Distributed Mending (Extended Abstract)  

E-Print Network (OSTI)

As communication networks grow, existing fault handling tools that involve global measures such as global time­outs or reset procedures become increasingly unaffordable, since their cost grows with the size of the network. Rather, for a fault handling mechanism to scale to large networks, its cost must depend only

Kutten, Shay

93

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

SciTech Connect

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.

Boles, James [Professor

2013-05-24T23:59:59.000Z

94

Simultaneous use of MRM (maximum rectangle method) and optimization methods in determining nominal capacity of gas engines in CCHP (combined cooling, heating and power) systems  

Science Journals Connector (OSTI)

Abstract Energy, economic, and environmental analyses of combined cooling, heating and power (CCHP) systems were performed here to select the nominal capacities of gas engines by combination of optimization algorithm and maximum rectangle method (MRM). The analysis was performed for both priority of providing electricity (PE) and priority of providing heat (PH) operation strategies. Four scenarios (SELL-PE, SELL-PH, No SELL-PE, No SELL-PH) were followed to specify design parameters such as the number and nominal power of prime movers, heating capacities of both backup boiler and energy storage tank, and the cooling capacities of electrical and absorption chillers. By defining an objective function called the Relative Annual Benefit (RAB), Genetic Algorithm optimization method was used for finding the optimal values of design parameters. The optimization results indicated that two gas engines (with nominal powers of 3780 and 3930kW) in SELL-PE scenario, two gas engines (with nominal powers of 5290 and 5300kW) in SELL-PH scenario, one gas engine (with nominal power of 2440kW) in No SELL-PE scenario provided the maximum value of the objective function. Furthermore in No SELL-PE scenario (which had the lowest RAB value in comparison with that for the above mentioned scenarios), thermal energy storage was not required. Due to very low value of RAB, any gas engine in No SELL-PH scenario was not recommended.

Sepehr Sanaye; Navid Khakpaay

2014-01-01T23:59:59.000Z

95

Reversible micromachining locator  

DOE Patents (OSTI)

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.

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

1999-08-31T23:59:59.000Z

96

Modelling Reverse Osmosis  

Science Journals Connector (OSTI)

After a brief presentation of the principal kinetic and thermodynamic aspects of the theory of reverse osmosis, the present review examines various physicochemical mechanisms of the selectivity of membranes with respect to electrolyte solutions: the electrochemical mechanism, related to the charge of the pore surface; the dielectric exclusion of ions, due to image forces; and the structural mechanism, due to the change in the properties of water in fine hydrophilic pores. Methods for calculating the changes in the standard chemical potentials of ions on entering the membrane phase, and the effects of the Donnan exclusion of ions with allowance for the different charge of the membrane have been described. It has been concluded that it is appropriate to use charged membranes to separate electrolyte solutions at low concentrations. The problem of the transport of solutions through the fine pores of membranes has been formulated, taking account of the equilibrium distribution coefficients of the ions, their mobility, the charge of the membrane, and the phenomenon of concentration polarisation. Routes to the further development of the theory as applied to membranes of different types, different compositions, and solution concentrations have been discussed. The bibliography contains 84 references.

S S Dukhin; Nikolai V Churaev; V N Shilov; Viktor M Starov

1988-01-01T23:59:59.000Z

97

Reverse osmosis reverses conventional wisdom with Superfund cleanup success  

SciTech Connect

Although widely recognized as the most efficient means of water purification, reverse osmosis has not been considered effective for remediating hazardous wastewater. Scaling and fouling, which can cause overruns and downtime, and require membrane replacement, have inhibited success in high-volume wastewater applications. Despite this background, a reverse osmosis technology developed in Europe recently was used successfully to treat large volumes of contaminated water at a major Superfund site in Texas. The technology's success there may increase the chances for reverse osmosis to find wider use in future cleanups and other waste treatment applications.

Collins, M. (French Ltd. Task Group, Crosby, TX (United States)); Miller, K. (Rochem Environmental Inc., Houston, TX (United States))

1994-09-01T23:59:59.000Z

98

Fault-tolerant control for current sensors of doubly fed induction generators based on an improved fault detection method  

Science Journals Connector (OSTI)

Abstract Fault-tolerant control of current sensors is studied in this paper to improve the reliability of a doubly fed induction generator (DFIG). A fault-tolerant control system of current sensors is presented for the DFIG, which consists of a new current observer and an improved current sensor fault detection algorithm. The current observer is constructed by using only voltage signals as inputs. The fault detection algorithm is based on the current observer, in which an adaptive threshold and different fault duration times are considered. The performance of the proposed observer, improved fault detection algorithm, and fault-tolerant control system are investigated by simulation. The results indicate that the outputs of the observer and the sensor are highly coherent. The fault detection algorithm can efficiently detect both soft and hard faults in current sensors, and the fault-tolerant control system can effectively tolerate both types of faults.

H. Li; C. Yang; Y.G. Hu; B. Zhao; M. Zhao; Z. Chen

2014-01-01T23:59:59.000Z

99

Observations on Buoyant Convection in Reverse Osmosis  

Science Journals Connector (OSTI)

Observations on Buoyant Convection in Reverse Osmosis ... Buoyancy Effects in Dead-End Reverse Osmosis:? Visualization by Holographic Interferometry ... Buoyancy Effects in Dead-End Reverse Osmosis:? Visualization by Holographic Interferometry ...

Terry J. Hendricks; Jean F. Macquin; Forman A. Williams

1972-05-01T23:59:59.000Z

100

TRANSIENT PROCESSOR/BUS FAULT TOLERANCE FOR EMBEDDED SYSTEMS  

E-Print Network (OSTI)

TRANSIENT PROCESSOR/BUS FAULT TOLERANCE FOR EMBEDDED SYSTEMS With hybrid redundancy and data the schedule length overhead. Keywords: real-time embedded systems, safety-critical systems, transient faults, ecological, and/or financial disasters) that could result from a fault, these systems must be fault

Girault, Alain

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


101

Quantification of Priority-OR gates in temporal fault trees  

Science Journals Connector (OSTI)

Fault Tree Analysis has been used in reliability engineering for many decades and has seen various modifications to enable it to analyse fault trees with dynamic and temporal gates so it can incorporate sequential failure in its analysis. Pandora is ... Keywords: Markov chains, Monte Carlo, Pandora, dynamic fault trees, fault trees, safety

Ernest Edifor; Martin Walker; Neil Gordon

2012-09-01T23:59:59.000Z

102

Intelligent fault prediction system based on internet of things  

Science Journals Connector (OSTI)

Fault prediction is the key technology to ensure the safe operation of large equipment. Based on the investigation of current and developing research of fault prediction, an intelligent fault prediction system based on internet of things is proposed ... Keywords: Fault prediction, Intelligent computer information processing, Internet of things, Mechanical equipment groups, Predictive maintenance

Xiaoli Xu; Tao Chen; Mamoru Minami

2012-09-01T23:59:59.000Z

103

Reversible concentric ring microfluidic interconnects  

E-Print Network (OSTI)

A reversible, Chip-to-Chip microfluidic interconnect was designed for use in high temperature, high pressure applications such as chemical microreactor systems. The interconnect uses two sets of concentric, interlocking ...

Thompson, Mary Kathryn, 1980-

2004-01-01T23:59:59.000Z

104

Microporous glasses for reverse osmosis  

Science Journals Connector (OSTI)

The preparation, heat-treatment and leaching of phase separable borosilicate glasses which are of interest as possible semipermeable membranes for reverse osmosis applications are described. It is shown that ... ...

P. W. McMillan; C. E. Matthews

1976-01-01T23:59:59.000Z

105

Reversible Dehydrogenation of Magnesium Borohydride to Magnesium...  

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

Reversible Dehydrogenation of Magnesium Borohydride to Magnesium Triborane in the Solid State Under Moderate Conditions. Reversible Dehydrogenation of Magnesium Borohydride to...

106

Hollow-Fiber Reverse Osmosis Membranes  

Science Journals Connector (OSTI)

Hollow-fiber membranes for reverse osmosis desalination are typically of the dense wall ... compact modules and further improve the economics of reverse osmosis desalination.

Mark E. Cohen; Michael A. Grable; Billy M. Riggleman

1972-01-01T23:59:59.000Z

107

Stacking and twin faults in close-packed crystal structures: exact description of random faulting statistics for the full range of faulting probabilities  

Science Journals Connector (OSTI)

A model of independent random faulting in face-centered-cubic and hexagonal close packing considering single deformation faults or twin faulting is revisited. The approach allows the analysis, within the random model, of the whole range of faulting probabilities. Several descriptions of the underlying faulting process are presented which allows the derivation of different properties of the faulted sequences. The probability of finding two layers of the same type layers apart is derived. It is shown that previous generalizations did not account for mixed terms in the final probability expressions.

Estevez-Rams, E.

2008-08-14T23:59:59.000Z

108

Observations and modeling of shallow fault creep along the San Andreas Fault System  

E-Print Network (OSTI)

refraction survey of the Imperial Valley region, California,earthquake, in The Imperial Valley, California, EarthquakeSlip on faults in the Imperial Valley triggered by the 4

Wei, Meng

2011-01-01T23:59:59.000Z

109

Injection Technologies for Fault Attacks on Microprocessors  

Science Journals Connector (OSTI)

The fault injection technique we will analyze in detail in Sect.16.3, is the constant under-powering of a computing device. By running the chip with a depleted power supply, the attacker is able to insert transi...

Alessandro Barenghi; Guido M. Bertoni; Luca Breveglieri

2012-01-01T23:59:59.000Z

110

Supporting fault-tolerant communication in networks  

E-Print Network (OSTI)

We address two problems dealing with fault-tolerant communication in networks. The first one is designing a distributed storage protocol tolerant to Byzantine failure of servers. The protocol implements a multi-writer multi-reader register which...

Kanjani, Khushboo

2009-05-15T23:59:59.000Z

111

Automated Fault Location In Smart Distribution Systems  

E-Print Network (OSTI)

measured at the power substation during a single phase to ground fault clearance [17] .............................................. 111 Figure 26 Analyzed signal using wavelet transform from phase B current during a fault [17..., but are not limited to, substation and feeder relay, intelligent controllers for capacitor bank switches or reclosers, Automatic Meter Reading (AMR) systems installed at the customer sites, power quality meters installed at strategic locations in the system, low...

Lotfifard, Saeed

2012-10-19T23:59:59.000Z

112

Development of a Hydrologic Characterization Technology for Fault Zones Final Report  

E-Print Network (OSTI)

Hydrologic Characterization Technology of Fault Zones, Phaseof Characterization Technology for Fault Zones, LBNL-1635E,Characterization on Technology of Fault Zones Phase II

Karasaki, Kenzi

2014-01-01T23:59:59.000Z

113

E-Print Network 3.0 - andreas fault zone Sample Search Results  

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

Chester Summary: accommodated along large plate-boundary faults like the San Andreas transform fault in California. These faults... depend in part on the structure of the tabular...

114

E-Print Network 3.0 - active fault zone Sample Search Results  

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

Earth Structure (2nd Edition), 2004 Summary: 292010 Oceanic Transform Faults and Fracture Zones Transform Fault: Active displacement. Fracture Zone: Fossil... fault, no active...

115

E-Print Network 3.0 - automatic fault management Sample Search...  

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

2000 Tutorial on Summary: Management 5. Fault Tolerant Applications 6. Fault Tolerant Hello Server Example 12;Tutorial on Fault... Systems, Inc, 2000 Who Has Control? ...

116

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

SciTech Connect

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.

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

2011-05-15T23:59:59.000Z

117

"giant faults" does not lead to total failure, because the displacement equivalent to the fault  

E-Print Network (OSTI)

"giant faults" does not lead to total failure, because the displacement equivalent to the fault changes in physical properties by cold working seen in Fig. 1 are attributed to this accumulated nanoscale as supporting material on Science Online. 5. T. W. Duerig, A. R. Pelton, in Materials Properties Handbook

Rubloff, Gary W.

118

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

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Stress and fault rock controls on fault zone hydrology, Coso geothermal field, CA Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Stress and fault rock controls on fault zone hydrology, Coso geothermal field, CA Details Activities (1) Areas (1) Regions (0) Abstract: In crystalline rock of the Coso Geothermal Field, CA, fractures are the primary source of permeability. At reservoir depths, borehole image, temperature, and mud logs indicate fluid flow is concentrated in extensively fractured damage zones of large faults well-oriented for slip.

119

Reversal modes in magnetic nanotubes  

E-Print Network (OSTI)

The magnetic switching of ferromagnetic nanotubes is investigated as a function of their geometry. Two independent methods are used: Numerical simulations and analytical calculations. It is found that for long tubes the reversal of magnetization is achieved by two mechanism: The propagation of a transverse or a vortex domain wall depending on the internal and external radii of the tube.

P. Landeros; S. Allende; J. Escrig; E. Salcedo; D. Altbir; E. E. Vogel

2006-11-08T23:59:59.000Z

120

Reverse engineering the human brain  

Science Journals Connector (OSTI)

...Thompson Reverse engineering the human brain Vincent Walsh Department of Experimental...can be used to temporarily prevent the brain from carrying out some of its normal functions...outline some of the advances in understanding brain function made by using TMS, and, in particular...

2000-01-01T23:59:59.000Z

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


121

Cosmological Significance of Time Reversal  

Science Journals Connector (OSTI)

... reversal at nearly the same time, that time being coincident with the occurrence of the Schwarzschild singularity, that is, the point at which the limiting radius, R = GM/ ... increases it would seem that a phenomenon not dissimilar to the spherical gravitational collapse of Schwarzschild will inevitably commence. This phenomenon depends on the relative velocity, and thus the position ...

KARY MULLIS

1968-05-18T23:59:59.000Z

122

Geometry of Cenozoic extensional faulting: Dixie Valley, Nevada | Open  

Open Energy Info (EERE)

Geometry of Cenozoic extensional faulting: Dixie Valley, Nevada Geometry of Cenozoic extensional faulting: Dixie Valley, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Geometry of Cenozoic extensional faulting: Dixie Valley, Nevada Abstract Precise definition of geometric relationships between individual basins and ranges may help to reveal the mechanical processes of Basin and Range Cenozoic extensional faulting at depth. Previous studies have attempted to identify simple horsts and grabens, tilted crustal blocks with planar faulting, or tilted crustal blocks with listric faulting in the shallow crust. Normal faults defining these crustal blocks may root (1) individually in the ductile lower crust, (2) in regional or local low-angle detachment faults, or (3) in igneous intrusions or decoupling surfaces

123

Robust model-based fault diagnosis for chemical process systems  

E-Print Network (OSTI)

diagnosis systems, which use limited information about the process model to robustly detect, discriminate, and reconstruct instrumentation faults. Broadly, the proposed method consists of a novel nonlinear state and parameter estimator coupled with a fault...

Rajaraman, Srinivasan

2006-08-16T23:59:59.000Z

124

New approach to the fault location problem using synchronized sampling  

E-Print Network (OSTI)

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

Mrkic, Jasna

2012-06-07T23:59:59.000Z

125

A hybrid fault tolerance technique in grid computing system  

Science Journals Connector (OSTI)

In order to achieve high level of reliability and availability, the grid infrastructure should be a foolproof fault tolerant. Fault tolerance plays a key role in order to assert availability and reliability of...

Kalim Qureshi; Fiaz Gul Khan; Paul Manuel; Babar Nazir

2011-04-01T23:59:59.000Z

126

Scalable, Fault-tolerant Management in a Service Oriented Architecture  

E-Print Network (OSTI)

Scalable, Fault-tolerant Management in a Service Oriented Architecture Harshawardhan Gadgil: Scalable, Fault-tolerance, Service Oriented Management, Architecture 1. Introduction With the explosion. The service-oriented architecture provides a simple and flexible framework for building sophisticated

127

Dynamic Inductance in Saturated Cores Fault Current Limiters  

Science Journals Connector (OSTI)

The saturated cores Fault Current Limiter (FCL) is one of the leading ... for providing a commercial robust solution to the fault current problem. Basically, the saturated cores FCL ... its saturated cores state ...

Y. Nikulshin; Y. Wolfus; A. Friedman

2014-09-01T23:59:59.000Z

128

Modeling and Simulation of Resistive Superconducting Fault-Current Limiters  

Science Journals Connector (OSTI)

Superconducting fault-current limiters (SFCL) offer ideal performance in electrical ... simulation model for a novel resistive type superconducting fault-current limiter is proposed. This model includes the elect...

S. Nemdili; S. Belkhiat

2012-10-01T23:59:59.000Z

129

A Magnetic Shielding Type Superconducting Fault-Current Limiter  

Science Journals Connector (OSTI)

In a Magnetic Shielding type Fault-Current Limiter (MSFCL), the characteristics of the magnetic ... ) is an important factor in limiting the current flow. In this study, to improve the efficiency of the fault current

N. Miyauchi; H. Nakane; S. Haseyama; S. Yoshizawa

1999-01-01T23:59:59.000Z

130

Consequences of Fault Currents Contributed by Distributed Generation  

E-Print Network (OSTI)

Consequences of Fault Currents Contributed by Distributed Generation Intermediate Project Report Currents Contributed by Distributed Generation Intermediate Report for the Project "New Implications in systems with distributed generation. The main concept described is that fault current throughout power

131

IVF: characterizing the vulnerability of microprocessor structures to intermittent faults  

Science Journals Connector (OSTI)

With the advancement of CMOS manufacturing process to nano-scale, future shipped microprocessors will be increasingly vulnerable to intermittent faults. Quantitatively characterizing the vulnerability of microprocessor structures to intermittent faults ...

Songjun Pan; Yu Hu; Xiaowei Li

2010-03-01T23:59:59.000Z

132

Design and analysis of a fault tolerant network processor  

E-Print Network (OSTI)

This thesis investigates the effect of transient faults on a processor and proposes on-chip fault tolerant design techniques to improve its reliability. The target processor is a general 32-bit, four stage pipeline, dual context RISC style design...

Desai, Shaishav A

2012-06-07T23:59:59.000Z

133

Dining philosophers with masking tolerance to crash faults  

E-Print Network (OSTI)

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...

Idimadakala, Vijaya K.

2009-05-15T23:59:59.000Z

134

Photovoltaic ground fault and blind spot electrical simulations.  

SciTech Connect

Ground faults in photovoltaic (PV) systems pose a fire and shock hazard. To mitigate these risks, AC-isolated, DC grounded PV systems in the United States use Ground Fault Protection Devices (GFPDs), e.g., fuses, to de-energize the PV system when there is a ground fault. Recently the effectiveness of these protection devices has come under question because multiple fires have started when ground faults went undetected. In order to understand the limitations of fuse-based ground fault protection in PV systems, analytical and numerical simulations of different ground faults were performed. The numerical simulations were conducted with Simulation Program with Integrated Circuit Emphasis (SPICE) using a circuit model of the PV system which included the modules, wiring, switchgear, grounded or ungrounded components, and the inverter. The derivation of the SPICE model and the results of parametric fault current studies are provided with varying array topologies, fuse sizes, and fault impedances. Closed-form analytical approximations for GFPD currents from faults to the grounded current carrying conductor-known as %E2%80%9Cblind spot%E2%80%9D ground faults-are derived to provide greater understanding of the influence of array impedances on fault currents. The behavior of the array during various ground faults is studied for a range of ground fault fuse sizes to determine if reducing the size of the fuse improves ground fault detection sensitivity. The results of the simulations show that reducing the amperage rating of the protective fuse does increase fault current detection sensitivity without increasing the likelihood of nuisance trips to a degree. Unfortunately, this benefit reaches a limit as fuses become smaller and their internal resistance increases to the point of becoming a major element in the fault current circuit.

Flicker, Jack David; Johnson, Jay

2013-06-01T23:59:59.000Z

135

Detachment Faulting & Geothermal Resources- Pearl Hot Spring, NV  

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

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

136

A method for quantitative fault diagnosability analysis of stochastic linear descriptor models  

Science Journals Connector (OSTI)

Analyzing fault diagnosability performance for a given model, before developing a diagnosis algorithm, can be used to answer questions like ''How difficult is it to detect a fault f"i?'' or ''How difficult is it to isolate a fault f"i from a fault f"j?''. ... Keywords: Fault detection and isolation, Fault diagnosability analysis, Model-based diagnosis

Daniel Eriksson; Erik Frisk; Mattias Krysander

2013-06-01T23:59:59.000Z

137

Bridge Fault Simulation Strategies for CMOS Integrated Circuits Brian Chess  

E-Print Network (OSTI)

Bridge Fault Simulation Strategies for CMOS Integrated Circuits Brian Chess Tracy Larrabee \\Lambda the Primitive Bridge Function, a char­ acteristic function describing the behavior of bridged com­ ponents, we present a theorem for detecting feedback bridge faults. We discuss two different methods of bridge fault

Larrabee, Tracy

138

UNSUPERVISED CLUSTERING FOR FAULT DIAGNOSIS IN NUCLEAR POWER PLANT COMPONENTS  

E-Print Network (OSTI)

1 UNSUPERVISED CLUSTERING FOR FAULT DIAGNOSIS IN NUCLEAR POWER PLANT COMPONENTS Piero Baraldi1 on transients originated by different faults in the pressurizer of a nuclear power reactor. Key Words: Fault of Nuclear Power Plants (NPPs) [Cheon et al., 1993; Kim et al., 1996; Reifman, 1997; Zio et al., 2006a; Zio

Boyer, Edmond

139

Stacking fault energy and microstructure effects on torsion texture evolution  

Science Journals Connector (OSTI)

...research-article Stacking fault energy and microstructure effects...2000, , Rosario, Argentina 3 Department of Geology...The stacking fault energy (SFE) of the metal...torsion| Stacking fault energy and microstructure e...CONICET-UNR) 2000, Rosario, Argentina 3Department of Geology...

2000-01-01T23:59:59.000Z

140

Continuity conditions for a fault consisting of obliquely aligned cracks  

E-Print Network (OSTI)

by the ambient stress, and other regions that are open and ¯uid- or air-®lled (e.g. Nagy 1992). The fault may as a ¯uid conduit or a seal depending on the fault zone complexity or microstructural details (Jones & Knipe 1996). Therefore, prediction of the fault seal potential is important. One way to characterize

Cambridge, University of

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


141

COMPLETE FAULT ANALYSIS FOR LONG TRANSMISSION LINE USING  

E-Print Network (OSTI)

COMPLETE FAULT ANALYSIS FOR LONG TRANSMISSION LINE USING SYNCHRONIZED SAMPLING Nan Zhang Mladen 77843-3128, U.S.A. Abstract: A complete fault analysis scheme for long transmission line represented fault analysis tool for transmission lines is very useful for on-line confirmation and off-line trouble

142

Concentrating Fruit Juices by Reverse Osmosis  

Science Journals Connector (OSTI)

The difference between reverse osmosis and ultrafiltration lies principally in the retention ... able to retain protein-sized molecules, whereas reverse osmosis membranes retain lower molecular weight solutes suc...

R. L. Merson; G. Paredes; D. B. Hosaka

1980-01-01T23:59:59.000Z

143

Reversals  

Science Journals Connector (OSTI)

By the fall of 1996, a few months before Jim Hall made the case against the Boeing 737 in his long letter to the...

Gerry Byrne

2002-01-01T23:59:59.000Z

144

Reverse engineering of integrated circuits  

DOE Patents (OSTI)

Software and a method therein to analyze circuits. The software comprises several tools, each of which perform particular functions in the Reverse Engineering process. The analyst, through a standard interface, directs each tool to the portion of the task to which it is most well suited, rendering previously intractable problems solvable. The tools are generally used iteratively to produce a successively more abstract picture of a circuit, about which incomplete a priori knowledge exists.

Chisholm, Gregory H. (Shorewood, IL); Eckmann, Steven T. (Colorado Springs, CO); Lain, Christopher M. (Pittsburgh, PA); Veroff, Robert L. (Albuquerque, NM)

2003-01-01T23:59:59.000Z

145

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

E-Print Network (OSTI)

STRUCTURE OF THE EASTERN RED ROCKS AND WIND RIDGE THRUST FAULTS, WYOMING: HOW A THRUST FAULT GAINS DISPLACEMENT ALONG STRIKE A Thesis by BRENT STANLEY HUNTSMAN Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1983 Major Subject: Geology STRUCTURE OF THE EASTERN RED ROCKS AND WIND RIDGE THRUST FAULTS, WYOMING: HOW A THRUST FAULT GAINS DISPLACEMENT ALONG STRIKE A Thesis by BRENT STANLEY HUNTSMAN...

Huntsman, Brent Stanley

1983-01-01T23:59:59.000Z

146

From mechanical modeling to seismic imaging of faults: A synthetic workflow to study the impact of faults on seismic  

Science Journals Connector (OSTI)

Abstract Although typically interpreted as 2D surfaces, faults are 3D narrow zones of highly and heterogeneously strained rocks, with petrophysical properties differing from the host rock. Here we present a synthetic workflow to evaluate the potential of seismic data for imaging fault structure and properties. The workflow consists of discrete element modeling (DEM) of faulting, empirical relations to modify initial acoustic properties based on volumetric strain, and a ray-based algorithm simulating prestack depth migration (PSDM). We illustrate the application of the workflow in 2D to a 100m displacement normal fault in a kilometer size sandstone-shale sequence at 1.5km depth. To explore the effect of particle size on fault evolution, we ran two DEM simulations with particle assemblages of similar bulk mechanical behavior but different particle size, one with coarse (13m particle radii) and the other with fine (0.51.5m particle radii) particles. Both simulations produce realistic but different fault geometries and strain fields, with the finer particle size model displaying narrower fault zones and fault linkage at later stages. Seismic images of these models are highly influenced by illumination direction and wave frequency. Specular illumination highlights flat reflectors outside the fault zone, but fault related diffractions are still observable. Footwall directed illumination produces low amplitude images. Hanging wall directed illumination images the shale layers within the main fault segment and the lateral extent of fault related deformation. Resolution and the accuracy of the reflectors are proportional to wave frequency. Wave frequencies of 20Hz or more are necessary to image the different fault structure of the coarse and fine models. At 3040Hz, there is a direct correlation between seismic amplitude variations and the input acoustic properties after faulting. At these high frequencies, seismic amplitude variations predict both the extent of faulting and the changes in rock properties in the fault zone.

Charlotte Botter; Nestor Cardozo; Stuart Hardy; Isabelle Lecomte; Alejandro Escalona

2014-01-01T23:59:59.000Z

147

Reversible Seeding in Storage Rings  

SciTech Connect

We propose to generate steady-state microbunching in a storage ring with a reversible seeding scheme. High gain harmonic generation (HGHG) and echo-enabled harmonic generation (EEHG) are two promising methods for microbunching linac electron beams. Because both schemes increase the energy spread of the seeded beam, they cannot drive a coherent radiator turn-by-turn in a storage ring. However, reversing the seeding process following the radiator minimizes the impact on the electron beam and may allow coherent radiation at or near the storage ring repetition rate. In this paper we describe the general idea and outline a proof-of-principle experiment. Electron storage rings can drive high average power light sources, and free-electron lasers (FELs) are now producing coherent light sources of unprecedented peak brightness While there is active research towards high repetition rate FELs (for example, using energy recovery linacs), at present there are still no convenient accelerator-based sources of high repetition rate, coherent radiation. As an alternative avenue, we recently proposed to establish steady-state microbunching (SSMB) in a storage ring. By maintaining steady-state coherent microbunching at one point in the storage ring, the beam generates coherent radiation at or close to the repetition rate of the storage ring. In this paper, we propose a method of generating a microbunched beam in a storage ring by using reversible versions of linac seeding schemes.

Ratner, Daniel; Chao, Alex; /SLAC

2011-12-14T23:59:59.000Z

148

Seismoelectric Imaging of a Shallow Fault System Employing Fault Guided Waves  

E-Print Network (OSTI)

Independent sets of reflection seismic and seismoelectric data were collected, processed, and interpreted with the aim of generating and studying guided waves within a fault zone. While seismic surveys have recently been utilized to investigate...

Cohrs, Frelynn Joseph Reese

2012-07-16T23:59:59.000Z

149

Fault-tolerant search of container codes  

Science Journals Connector (OSTI)

This paper describes a method to locate and recognize container code characters. This method is aimed to make more fault-tolerant a system based on tophat transformation, segmentation algorithms, filters and classifiers. Our aim is to be able to find ... Keywords: character recognition, computer vision, segmentation

Juan Rosell; Gabriela Andreu; Alberto Prez

2006-08-01T23:59:59.000Z

150

Fault-tolerant search of container codes  

Science Journals Connector (OSTI)

This paper describes a method to locate and recognize container code characters. This method is aimed to make more fault-tolerant a system based on tophat transformation, segmentation algorithms, filters and classifiers. Our aim is to be able to find ... Keywords: character recognition, computer vision, segmentation

Juan Rosell; Gabriela Andreu; Alberto Prez

2006-09-01T23:59:59.000Z

151

Sensor Fault Diagnosis Using Principal Component Analysis  

E-Print Network (OSTI)

and the assumption of white Gaussian noise, the effect of noise on the isolability is studied, and the minimum magnitude of isolable fault in each sensor is found based on the distribution of noise in the measurement system. Next, for the decision process a...

Sharifi, Mahmoudreza

2010-07-14T23:59:59.000Z

152

Adaptive performance support for fault diagnosis  

Science Journals Connector (OSTI)

This paper introduces a strategy, a user model, and a methodology for utilising adaptive hypermedia in performance support domain and specifically for fault diagnosis. This utilisation is implemented by employing task-specific and user-centred hypermedia ... Keywords: adaptive hypermedia, diagnostic expert systems, performance support systems, semantic data modelling, user modelling

Ammar M. Huneiti

2008-07-01T23:59:59.000Z

153

FPGA Interconnect Delay Fault Testing Erik Chmelar  

E-Print Network (OSTI)

A satisfactory FPGA testing method meets several crite- ria. First, the routing resources must be explicitlyFPGA Interconnect Delay Fault Testing Erik Chmelar Center for Reliable Computing Stanford is a scalable manufactur- ing test method for all SRAM-based FPGAs, able to detect multiple interconnect delay

Stanford University

154

Radon emanation on San Andreas Fault  

Science Journals Connector (OSTI)

... RADON is constantly emanated from the Earth into its atmosphere, normally in minute amounts. ... is constantly emanated from the Earth into its atmosphere, normally in minute amounts. Radon emanation is known to be anomalously large on active faults and to show temporal variations ...

Chi-Yu King

1978-02-09T23:59:59.000Z

155

All row, planar fault detection system  

DOE Patents (OSTI)

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.

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

2013-07-23T23:59:59.000Z

156

Reflection seismic profiling in Wabash Valley fault system in southwestern Indiana  

SciTech Connect

During the summer of 1988 common-depth-point (CDP) reflection seismic profiling was initiated by ARPEX in southwestern Indiana in the Wabash Valley fault system. A 2.2-im (1.4-mi) east-west profile was shot across the Mt. Vernon graben in Posey County. Minihole shooting in 21-m (68.9-ft) patterns using 3.4 kg (7.5 lb) of seismic explosives distributed in five 3-m (10-ft) holes provided the energy source. Most shotholes were made with a reversible air-driven penetrating tool that was effective in dense clays. The 12-geophone array length was 43 m (141 ft), and the nominal far-trace offset was 2.1 km (7,000 ft). A 48-channel recording yielded 24-CDP coverage at 11-m (36-ft) intervals. Data were enhanced by gapped deconvolution, bandpass filtering, and CDP stack. The strongest and most continuous reflections at 0.75 and 1.6 sec are associated with the New Albany Shale (Devonian-Mississippian) and Eau Claire Formation (Cambrian), respectively. Within the Mt. Vernon graben and east of the Spenser Consolidated oil field, the depth to Eau Claire Formation apparently increases by approximately 60 m (197 ft) over a horizontal distance of 1.4 km (0.9 mi). Minor faulting east of the Spencer Consolidated field appears to be synthetic to the Hovey lake fault, which bounds the eastern side of the Mt. Vernon graben. Tentative interpretations of faulting and weak reflections from depths greater than 4.5 km (15,000 ft) may be clarified by additional data processing and by additional seismic profiling planned by ARPEX.

Rene, R.M.; Hester, N.C.; Stanonis, F.L. (Indiana Univ., Bloomington (USA))

1989-08-01T23:59:59.000Z

157

The Carlson-Simpson Lemma in Reverse Mathematics  

E-Print Network (OSTI)

6.3 Reverse Mathematicswords . . . . . 1.4 Reverse Mathematics diagrams Miller-1.1 Reverse Mathematics . . . . . . 1.2 The Dual Ramsey

Erhard, Julia Christina

2013-01-01T23:59:59.000Z

158

Reversible Fuel Cells Workshop Summary Report | Department of...  

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

Reversible Fuel Cells Workshop Summary Report Reversible Fuel Cells Workshop Summary Report Summary and presentations from the NREL Reversible Fuel Cells Workshop held April 19,...

159

Active Fault Segments As Potential Earthquake Sources- Inferences From  

Open Energy Info (EERE)

Active Fault Segments As Potential Earthquake Sources- Inferences From Active Fault Segments As Potential Earthquake Sources- Inferences From Integrated Geophysical Mapping Of The Magadi Fault System, Southern Kenya Rift Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Active Fault Segments As Potential Earthquake Sources- Inferences From Integrated Geophysical Mapping Of The Magadi Fault System, Southern Kenya Rift Details Activities (0) Areas (0) Regions (0) Abstract: Southern Kenya Rift has been known as a region of high geodynamic activity expressed by recent volcanism, geothermal activity and high rate of seismicity. The active faults that host these activities have not been investigated to determine their subsurface geometry, faulting intensity and constituents (fluids, sediments) for proper characterization of tectonic

160

Definition: Enhanced Fault Detection Technology | Open Energy Information  

Open Energy Info (EERE)

Technology Technology Jump to: navigation, search Dictionary.png Enhanced Fault Detection Technology Enhanced fault detection technology enables higher precision and greater discrimination of fault location and type with coordinated measurement among multiple devices. For distribution applications, this technology can detect and isolate faults without full-power re-closing, reducing the frequency of through-fault currents. Using high resolution sensors and fault signatures, this technology can better detect high impedance faults. For transmission applications, this technology will employ high speed communications between multiple elements (e.g., stations) to protect entire regions, rather than just single elements. It can also use the latest digital techniques to advance beyond conventional impedance relaying of

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While these samples are representative of the content of NLEBeta,
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161

Upper crustal faulting in an obliquely extending orogen, structural control  

Open Energy Info (EERE)

faulting in an obliquely extending orogen, structural control faulting in an obliquely extending orogen, structural control on permeability and production in the Coso Geothermal Field, eastern California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Upper crustal faulting in an obliquely extending orogen, structural control on permeability and production in the Coso Geothermal Field, eastern California Details Activities (1) Areas (1) Regions (0) Abstract: New multifold seismic reflection data from the Coso geothermal 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 Coso Wash fault, a Quaternary-active normal fault that is a locus of surface geothermal activity, is well-imaged as a

162

Geometry and development of relay ramps in normal fault systems  

SciTech Connect

Normal fault zones play a major role in the development of basins and in the migration and trapping of hydrocarbons. The mapping of normal fault systems using seismic data requires careful correlation of faults on adjacent sections, a procedure that often leads to the interpretation of faults as having long, continuous, sinuous traces. Recent work involving detailed mapping of fault traces, first by using land exposures but more recently using three-dimensional seismics, has demonstrated that faults are usually made up of many overstepping segments, linked by areas of complex deformation, termed transfer zones or relay ramps. Relay ramps occur between normal fault segments that overstep in map view. The geometry and evolution of exposure-scale relay ramps are described from the Somerset coast, England, and are compared with larger scale ramps from elsewhere. Relay ramps can be classified into four groups based on the degree of interaction and linkage between the overstepping segments; these groups are interpreted as being evolutionary stages. In stage 1, the segments do not interact. Stage 2 involves the reorientation of bedding between two interacting faults to produce a relay ramp. In stage 3, connecting fractures start to break the relay ramp. Stage 4 is when the relay ramp is destroyed to produce a single fault that has an along-strike bend. These evolutionary stages can develop through time, but they can also be seen spatially. A branch line between normal faults or an along-strike bend may represent a stage 4 relay, with progressively earlier stages occurring updip or downdip. Characteristic variability in displacement-distance profiles for fault segments and linked faults accompanies the interaction and linkage processes. Displacement transfer by relay ramps is accompanied by steep displacement gradients along fault segments at oversteps. Relay ramps often contribute to a minimum in total fault displacement at a linkage point. 47 refs., 16 figs.

Peacock, D.C.P. (Univ. of Southampton (United Kingdom) Univ. of Plymouth, Devon (United Kingdom)); Sanderson, D.J. (Univ. of Southampton (United Kingdom))

1994-02-01T23:59:59.000Z

163

Novel 3-Phase Inductive Fault Current Limiter  

Science Journals Connector (OSTI)

The paper describes the inductive three-phase fault current limiter. In this work I examine the novel arrangements of the perfect closed superconducting loop made of HTS wire. I applied one iron core with 3 limbs and special loops for uniform temperature of the superconducting wire. In this work I present the results of my experiments with this device. I present the static and dynamic measured results of this solution. It has got several advantages e. g. fast switching and less fault power for high-power electric machines. The advantage of the equipment is that in the case of single-phase short circuit the current will decrease in all the three phases. This can be an appropriate solution for high power machines. For example, in the case of high-power electric motor if there is a single-phase breaking or a single phase short circuit, we can decrease the current in the three phases.

Janos Kosa

2012-01-01T23:59:59.000Z

164

Morphometric and geometric characterization of normal faults on Mars  

Science Journals Connector (OSTI)

Abstract Using three different approaches (fault plane fitting, 3D crater rim palinspatic restorations and fault scarps morphometric analysis) we investigate the geometry and degradation history of Martian normal faults in two distinct areas. The three independent methods produce similar results, indicating that the average dip angle of the normal faults on these two locations is probably below the value that is usually assumed for Mars (?60). Our best estimate for this average dip angle is 46.8 9.8 , which is a value comparable with the mean dip angle inferred on Earth for seismically active normal faults. This lower average dip angle implies that all the rift strain estimates performed until now might be underestimated. From the comparative analysis of the two faulted regions (Phlegethon Catena and Claritas Fossae), we show that local and regional dip variabilities may exist on Mars. This reinforces the idea that the amount of extension associated with Martian rifts must be reconsidered. We also demonstrate the advantages of performing a comparative morphometric analysis of fault scarps. This approach enables the reconstruction of the faults scarps degradation history and can be used to evaluate how environmental conditions changed through time. After modeling the degradation of the fault scarps at the two sites we conclude that the observed morphometric variations are mainly due to the different faulting ages in an environment characterized by low scarp degradation rates ( 4 10 ? 3 m 2 / kyr ) over the last 3 Ga.

David A. Vaz; Mauro G. Spagnuolo; Simone Silvestro

2014-01-01T23:59:59.000Z

165

Calculating the probability of injected carbon dioxide plumes encountering faults  

SciTech Connect

One of the main concerns of storage in saline aquifers is leakage via faults. In the early stages of site selection, site-specific fault coverages are often not available for these aquifers. This necessitates a method using available fault data to estimate the probability of injected carbon dioxide encountering and migrating up a fault. The probability of encounter can be calculated from areal fault density statistics from available data, and carbon dioxide plume dimensions from numerical simulation. Given a number of assumptions, the dimension of the plume perpendicular to a fault times the areal density of faults with offsets greater than some threshold of interest provides probability of the plume encountering such a fault. Application of this result to a previously planned large-scale pilot injection in the southern portion of the San Joaquin Basin yielded a 3% and 7% chance of the plume encountering a fully and half seal offsetting fault, respectively. Subsequently available data indicated a half seal-offsetting fault at a distance from the injection well that implied a 20% probability of encounter for a plume sufficiently large to reach it.

Jordan, P.D.

2011-04-01T23:59:59.000Z

166

An overview of time?reversal acoustics  

Science Journals Connector (OSTI)

Time?reversal invariance is a very powerful concept in physics. In the field of acoustics where time reversal invariance occurs time?reversal experiments may be achieved simply with arrays of transmit?receive transducers allowing an incident wave field to be sampled recorded time?reversed and re?emitted. Time reversal mirrors (TRMs) may be used to study random media and chaotic reverberating structures. Common to these complex media is a remarkable robustness exemplified by observations that the more complex the medium between the probe source and the TRM the sharper the focus. TRMs open the way to new signal processings that interest imaging detection telecommunications and therapy. Time reversal mirrors have plenty of applications including ultrasonic therapy and medical imaging non destructive testing telecommunications underwater acoustics seismology sound control home automation. An overview of these fields will be presented.

Mathias Fink

2008-01-01T23:59:59.000Z

167

Relaxed fault detection and isolation: An application to a nonlinear case study  

Science Journals Connector (OSTI)

Given a number of possibly concurrent faults (and disturbances) that may affect a nonlinear dynamic system, it may not be possible to solve the standard fault detection and isolation (FDI) problem, i.e., to detect and isolate each single fault from all ... Keywords: Fault detection and isolation, Fault sets, Geometric conditions, Nonlinear systems, Robot manipulators

Raffaella Mattone; Alessandro De Luca

2006-01-01T23:59:59.000Z

168

Boundary-Layer Effects in Reverse Osmosis  

Science Journals Connector (OSTI)

Boundary-Layer Effects in Reverse Osmosis ... In FO, water is extracted from a feed solution using the high osmotic pressure of a hypertonic solution that flows on ... ...

Ulrich Merten; H. K. Lonsdale; R. L. Riley

1964-01-01T23:59:59.000Z

169

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

Open Energy Info (EERE)

Type E: Extensional Tectonic, Fault-Controlled Resource Type E: Extensional Tectonic, Fault-Controlled Resource Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Type E: Extensional Tectonic, Fault-Controlled Resource Dictionary.png Type E: Extensional Tectonic, Fault-Controlled Resource: No definition has been provided for this term. Add a Definition Brophy Occurrence Models This classification scheme was developed by Brophy, as reported in Updating the Classification of Geothermal Resources.[1] Type A: Magma-heated, Dry Steam Resource Type B: Andesitic Volcanic Resource Type C: Caldera Resource Type D: Sedimentary-hosted, Volcanic-related Resource Type E: Extensional Tectonic, Fault-Controlled Resource Type F: Oceanic-ridge, Basaltic Resource Extensional-tectonic, fault-controlled resources typically result from a

170

Fault Mapping At Raft River Geothermal Area (1993) | Open Energy  

Open Energy Info (EERE)

Fault Mapping At Raft River Geothermal Area (1993) Fault Mapping At Raft River Geothermal Area (1993) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Fault Mapping At Raft River Geothermal Area (1993) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Fault Mapping Activity Date 1993 Usefulness useful DOE-funding Unknown Exploration Basis Geologic mapping, strain and kinematic analysis Notes The mountains expose a detachment fault that separates a hanging wall of Paleozoic rocks from Proterozoic and Archean rocks of the footwall. Beneath the detachment lies a 100 to 300m-thick top-to-the-east extensional shear zone. Geologic mapping, strain and kinematic analysis, and 40Ar/39Ar thermochronology suggest that the shear zone and detachment fault had an

171

Similarity Matching Techniques for Fault Diagnosis in Automotive Infotainment Electronics  

E-Print Network (OSTI)

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...

Kabir, Mashud

2009-01-01T23:59:59.000Z

172

Active Faulting in the Coso Geothermal Field, Eastern California | Open  

Open Energy Info (EERE)

Faulting in the Coso Geothermal Field, Eastern California Faulting in the Coso Geothermal Field, Eastern California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Active Faulting in the Coso Geothermal Field, Eastern California Details Activities (1) Areas (1) Regions (0) Abstract: New mapping documents a series of late Quaternary NNE-striking normal faults in the central Coso Range that dip northwest, toward and into the main production area of the Coso geothermal field. The faults exhibit geomorphic features characteristic of Holocene activity, and locally are associated with fumaroles and hydothermal alteration. The active faults sole into or terminate against the brittle-ductile transition zone (BDT) at a depth of about 4 to 5 km. The BDT is arched upward over a volume of crust

173

Fault diagnosis and management system for switched reluctance motor drives  

Science Journals Connector (OSTI)

An effective detection and diagnosis of faults is desirable for online condition monitoring, assessment, product quality assurance and improved operational efficiency of Switched Reluctance Motor (SRM) drives. The proposed fault diagnosis and management system uses the measured phase voltages, currents and speed of the motor. In this article, a Matlab/Simulink model-based fault diagnosis system is developed and simulated for SRM drive. The simulation results show that the SRM drive is capable of operating under faulty conditions.

S. Vijayan; S. Paramasivam

2008-01-01T23:59:59.000Z

174

Mechanical properties and fabric of the Punchbowl fault zone, California  

E-Print Network (OSTI)

, and 50 to 125'C, in the presence of pore fluids. The fault zone and surrounding rock consists of (1) the main gouge zone, separated from (2) the undeformed host-rack, by (3) an irregular zone of damaged host-rock. The subsidiary fault fabric... orientations of discrete shear surfaces within the gouge 52 14 Photographs of subsidiary faults within the damaged zone of the Punchbowl Formation. . . . . . 57 15 Photomicrographs showing the progressive increase in deformation of the Punchbowl Formation...

Chester, Frederick Michael

2012-06-07T23:59:59.000Z

175

Fault Detection and Diagnosis Method for VAV Terminal Units  

E-Print Network (OSTI)

: Air density [kg/m3] NOMENCLATURE REFERENCES 1) IEA Annex 25, Building Optimization and Fault Diagnosis Source Book, Eds. J. Hyvarinen and S. Karki, Technical Research Center of Finland, 1996 2) Harunori Yoshida: Typical Faults of Air Conditioning..., IEA Annex 34 ?Detection and Diagnosis Methods in Real Building?, Eds. A. Dexter and J. Pakanen, Section C.2, pp.143-148, 2001 6) Harunori Yoshida, Sanjay Kumar, Yasunori Morita: Online Fault Detection and Diagnosis in VAV Air Handling Unit by RARX...

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

2004-01-01T23:59:59.000Z

176

High Temperature Superconducting Fault Current Limiter for Utility Applications  

Science Journals Connector (OSTI)

One of the most near term High Temperature Superconductor (HTS) applications is the Fault Current Limiter (FCL). It is a device that...

E. M. W. Leung; G. W. Albert; M. Dew

1997-01-01T23:59:59.000Z

177

The northwest extension of the Meers Fault in southwestern Oklahoma  

E-Print Network (OSTI)

unmapped terrace deposits, a trench, and creek banks along an extended N60W trending line in Kiowa County, Oklahoma, strongly suggests that the Meers Fault has an active northwest extension of about 30km which bifurcates in the Sugar Creek area... Fault Study Area The study area covers about 100 square miles and it is located about 20 mi N45W of Lawton, Oklahoma, primarily in Kiowa and Comanche counties (TSN, R14W and R15W) (Figure 7). The Meers Fault is the south-bounding fault of the complex...

Cetin, Hasan

2012-06-07T23:59:59.000Z

178

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...

179

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

Open Energy Info (EERE)

Results from the Coso Geothermal Field, CA Abstract cap rock, permeability, fault, fracture, clay, Coso Authors Davatzes, N.C.; Hickman and S.H. Published Geothermal Resource...

180

High-Resolution Aeromagnetic Survey to Image Shallow Faults,...  

Open Energy Info (EERE)

Valley Geothermal Area Regions (0) Retrieved from "http:en.openei.orgwindex.php?titleHigh-ResolutionAeromagneticSurveytoImageShallowFaults,DixieValleyGeothermalField...

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


181

Application of machine learning technique in wind turbine fault diagnosis.  

E-Print Network (OSTI)

??In this study, a machine learning technique called anomaly detection is employed for wind turbine bearing fault detection. Basically, the anomaly detection algorithm is used (more)

Purarjomandlangrudi, Afrooz

2014-01-01T23:59:59.000Z

182

Nonidentified Kikuchi lines with reverse contrast  

SciTech Connect

Electron diffraction patterns of silicon in transmission with contrast reversal from bright to dark for an unidentified Kikuchi line along its length have been obtained. The contrast reversal of an unidentified line is explained within the elementary mechanism of Kikuchi pattern formation taking into account the Kikuchi electron double diffraction.

Karakhanyan, K. R., E-mail: kkarakhanyan@yandex.ru [Yerevan State University (Armenia)

2009-03-15T23:59:59.000Z

183

REVERSIBLE SOLID OXIDE CELLS Mogens Mogensen1  

E-Print Network (OSTI)

The reversibility of solid oxide fuel cells (SOFC), i.e. that they could also work in the solid oxide electrolyser1 REVERSIBLE SOLID OXIDE CELLS Mogens Mogensen1 , Søren Højgaard Jensen1,2 , Anne Hauch1,3 , Ib Chorkendorff2 and Torben Jacobsen3 1 Fuel Cell and Solid State Chemistry Department Risø National Laboratory

184

Application of fuzzy SOFM neural network and rough set theory on fault diagnosis for rotating machinery  

Science Journals Connector (OSTI)

This paper presents a new method that applies fuzzy logic, rough set theory and SOFM neural network to rotating machinery fault diagnosis. In this method, firstly, relationships between the fault causations and fault symptoms are established by fuzzy ...

Dongxiang Jiang; Kai Li; Gang Zhao; Jinhui Diao

2005-05-01T23:59:59.000Z

185

Feng shui of supercomputer memory: positional effects in DRAM and SRAM faults  

Science Journals Connector (OSTI)

Several recent publications confirm that faults are common in high-performance computing systems. Therefore, further attention to the faults experienced by such computing systems is warranted. In this paper, we present a study of DRAM and SRAM faults ...

Vilas Sridharan; Jon Stearley; Nathan DeBardeleben; Sean Blanchard; Sudhanva Gurumurthi

2013-11-01T23:59:59.000Z

186

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

E-Print Network (OSTI)

relationship between the progressive addition of subsidiary fault segments (deformation bands) and earlier-formed linkage structures. The along-strike variability and distribution of fault structure are documented and used to assess the role of early fault...

Schafer, Kirk Wyatt

2012-06-07T23:59:59.000Z

187

Research on Fault Diagnosis of Marine Diesel Engine Based on Integrated Similarity  

Science Journals Connector (OSTI)

In order to guarantee the normal operation of marine, an effective fault diagnosis model need to ... to determine the reason causing the fault of marine diesel engine. According to the problem of fault diagnosis ...

Yanyou Chai; Xiuyan Peng; Liufeng Xu; Jiuyu Shi

2011-01-01T23:59:59.000Z

188

Fault tolerant control of homopolar magnetic bearings and circular sensor arrays  

E-Print Network (OSTI)

Fault tolerant control can accommodate the component faults in a control system such as sensors, actuators, plants, etc. This dissertation presents two fault tolerant control schemes to accommodate the failures of power amplifiers and sensors in a...

Li, Ming-Hsiu

2006-04-12T23:59:59.000Z

189

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

E-Print Network (OSTI)

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 catastrophic...

Zhang, Xujia

2006-08-16T23:59:59.000Z

190

Curiosity's Fault Tolerant Wakeup and Shutdown Design  

Science Journals Connector (OSTI)

Abstract Curiosity spends roughly 70% of the day sleeping, in order to recharge the batteries from the nuclear power source. The system is designed to ensure the Rover goes to sleep and wakes back up to continue science and engineering activities. Additionally, the design is robust to off-nominal situations that may need additional actions performed by both hardware and software to ensure the Rover can communicate with the Earth. This paper describes nominal and off-nominal behavioral patterns, fault tolerance features designed into the Rover system (hardware and software), several off-nominal scenarios that are accommodated by the design, and some lessons learned from this development effort.

Tracy A. Neilson; James A. Donaldson

2014-01-01T23:59:59.000Z

191

Fault current limiters and power switches  

SciTech Connect

Five papers give an overview of the Los Alamos National Lab`s collaboration with private industry and universities in developing High-Temperature Superconductor (HTS) Devices. Highlighted is the lab`s general approach and technical progress towards: design and fabrication of HTS current leads; high gradient magnetic separation for treatment of drinking and waste water; development of coils based on superconductor tape windings; testing of a HTS fault current limiter; and AC loss measuments of multifilament layered HTS conductors. Listed for each of these projects are commercial and university research/development partners along with the proposed projects for FY 1995.

Boenig, H. [Los Alamos National Lab., NM (United States)

1994-07-29T23:59:59.000Z

192

Fault Analysis at a Wind Power Plant for One Year of Observation: Preprint  

SciTech Connect

This paper analyzes the fault characteristics observed at a wind power plant, and the behavior of the wind power plant under fault events.

Muljadi, E.; Mills, Z.; Foster, R.; Conto, J.; Ellis, A.

2008-07-01T23:59:59.000Z

193

E-Print Network 3.0 - automated fault extraction Sample Search...  

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

with extracted... automation, fault diagnosis, asset management, as well as power system modeling and simulation. 12;... 1 F Voltage Sag Data Utilization for Distribution Fault...

194

Fault Identification in Doubly Fed Induction Generator Using FFT and Neural Networks  

Science Journals Connector (OSTI)

This paper presents a fault identification system for doubly fed induction generator (DFIG). It considers cases of single phase ... with the PP to fault identification in the DFIG.

Marcelo Patrcio de Santana

2012-01-01T23:59:59.000Z

195

Fault current limiter with shield and adjacent cores  

DOE Patents (OSTI)

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.

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

2013-10-22T23:59:59.000Z

196

Creep along the Imperial Fault, southern California, from GPS measurements  

E-Print Network (OSTI)

on a fault. [4] Located southwest of the Salton Sea (Figure 1), the Imperial Valley has experienced numerousCreep along the Imperial Fault, southern California, from GPS measurements Suzanne N. Lyons, Yehuda Positioning System (GPS) 46 geodetic monuments established by Imperial College, London, in a dense grid (half

Sandwell, David T.

197

Fault Tolerant Oxygen Control of a Diesel Engine Air System  

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

198

The faults that move during earthquakes do not always come  

E-Print Network (OSTI)

often live near active faults, because where there is a fault there is usually a water supply. And that means these places become part of major trade routes, like the Silk Roads across Asia from Xi urban building. What is even more frighten- ing is that in many parts of the world poor

Cipolla, Roberto

199

Fault detection and diagnosis capabilities of test sequence selection  

E-Print Network (OSTI)

Review Fault detection and diagnosis capabilities of test sequence selection methods based on the FSM model T Ramalingam*, Anindya Dast and K ThuIasiraman* Different test sequence selection methods resolution in diagnosing the fault. The test sequence selection methods are then compared based on the length

Thulsiraman, Krishnaiyan

200

Observations on the capability of the Criner fault, southern Oklahoma  

E-Print Network (OSTI)

of the Criner fault arises because of its proximity to the Meers fault, which is documented to have been reactivated within the last 1200 years. Such findings contradict the prevailing view that the inner continent of North America is a stable tectonic regime...

Williamson, Shawn Collin

2012-06-07T23:59:59.000Z

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


201

An investigation of Network Splitting for Fault Level Reduction  

E-Print Network (OSTI)

main methods for fault level reduction namely current limiting reactor, Is-limiter, superconducting term as it is relatively inexpensive and furthermore it has high reliability and flexibility. Modelling in the bus-section. The analysis shows that the fault current is sensitive to closure of the normally open

Watson, Andrew

202

Dating of major normal fault systems using thermochronology- An example  

Open Energy Info (EERE)

Dating of major normal fault systems using thermochronology- An example Dating of major normal fault systems using thermochronology- An example from the Raft River detachment, Basin and Range, western United States Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Dating of major normal fault systems using thermochronology- An example from the Raft River detachment, Basin and Range, western United States Details Activities (1) Areas (1) Regions (0) Abstract: Application of thermochronological techniques to major normal fault systems can resolve the timing of initiation and duration of extension, rates of motion on detachment 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 determine

203

Recent earthquake sequences at Coso: Evidence for conjugate faulting and  

Open Energy Info (EERE)

earthquake sequences at Coso: Evidence for conjugate faulting and earthquake sequences at Coso: Evidence for conjugate faulting and stress loading near a geothermal field Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Recent earthquake sequences at Coso: Evidence for conjugate faulting and stress loading near a geothermal field Details Activities (1) Areas (1) Regions (0) Abstract: Two recent earthquake sequences near the Coso geothermal field show clear evidence of faulting along conjugate planes. We present results from analyzing an earthquake sequence occurring in 1998 and compare it with a similar sequence that occurred in 1996. The two sequences followed mainshocks that occurred on 27 November 1996 and 6 March 1998. Both mainshocks ruptured approximately colocated regions of the same fault

204

Definition: Apex or Salient of Normal Fault | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Apex or Salient of Normal Fault Jump to: navigation, search Dictionary.png Apex or Salient of Normal Fault Normal faults may intersect in the subsurface to form a fault apex or salient. Apices or salients of normal faults account for 3% of structural controls in the Great Basin.[2] View on Wikipedia Wikipedia Definition References ↑ James E. Faulds,Nicholas H. Hinz,Mark F. Coolbaugh,Patricia H. Cashman,Christopher Kratt,Gregory Dering,Joel Edwards,Brett Mayhew,Holly McLachlan. 2011. Assessment of Favorable Structural Settings of Geothermal Systems in the Great Basin, Western USA. In: Transactions. GRC Anual Meeting; 2011/10/23; San Diego, CA. Davis, CA: Geothermal Resources Council; p. 777-783

205

Reversible chemisorption on highly dispersed Ru catalysts  

SciTech Connect

Hydrogen and carbon monoxide adsorptions have been studied by static gas volumetric measurement on a range of highly dispersed Y-zeolite-supported ruthenium catalysts prepared by ion exchange. At ambient temperature, the absorption isotherms indicated two distinct types of adsorption - reversible (composed of both physisorption and weak chemisorption) and irreversible (strongly chemisorbed). The catalysts were highly dispersed and had average particle diameters ranging from 0.9 to 1.6 nm. Reversible hydrogen chemisorption was found to be a function of average particle diameter and dispersion. On the other hand, reversible carbon monoxide chemisorption seemed to be mainly due to interaction with the support.

Yang, C.H.; Goodwin, J.G. Jr.

1982-11-01T23:59:59.000Z

206

Reverse osmosis desalination: Modeling and experiment  

Science Journals Connector (OSTI)

An analytic model for the performance of reverse osmosis desalination systems is derived. Predictions are shown to agree well with extensive measurements conducted on a commercial multistage reverse osmosis desalination unit over a broad range of operating conditions. The model allows a transparent understanding of the dependence of system performance on key design and operating variables. Identifying the characteristic flow rate and length scale of reverse osmosis systems allows a universal description of the variation of the permeate flow rate and recovery factor with the salinity flow rate and pressure of the feedwater.

Naum Fraidenraich; Olga C. Vilela; Gilmrio A. Lima; Jeffrey M. Gordon

2009-01-01T23:59:59.000Z

207

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

E-Print Network (OSTI)

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

Engelmann, Christian

208

Direct Imaging of Asymmetric Magnetization Reversal  

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

Direct Imaging of Asymmetric Magnetization Reversal Print Direct Imaging of Asymmetric Magnetization Reversal Print The phenomenon of exchange bias has transformed how data is read on magnetic hard disks and created an explosion in their information storage density. However, it remains poorly understood, and even the fundamental mechanism of magnetic reversal for exchange-biased systems in changing magnetic fields is unclear. By using x-ray photoemission electron microscopy at the ALS to directly image the magnetic structure of an exchange-biased film, a team from the University of Washington and the Stanford Synchrotron Radiation Laboratory has identified separate magnetic-reversal mechanisms in the two branches of a hysteresis loop. This advance in fundamental understanding will provide new insights for developing the next generation of information storage and sensing devices where exchange bias is expected to play a critical role.

209

Reversing the Circulation of Magnetic Vortices  

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

Reversing the Circulation of Reversing the Circulation of Magnetic Vortices Reversing the Circulation of Magnetic Vortices Print Wednesday, 31 July 2013 00:00 In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

210

Subsurface imaging with reverse vertical seismic profiles  

E-Print Network (OSTI)

This thesis presents imaging results from a 3D reverse vertical seismic profile (RVSP) dataset measured at a hydrocarbon bearing pinnacle reef in northern Michigan. The study presented many challenges in seismic data ...

Krasovec, Mary L. (Mary Lee), 1972-

2001-01-01T23:59:59.000Z

211

How to reverse-engineer quality rankings  

Science Journals Connector (OSTI)

A good or bad product quality rating can make or break an organization. However, the notion of quality is often defined by an independent rating ... step in this process is to reverse-engineer a rating compan...

Allison Chang; Cynthia Rudin; Michael Cavaretta; Robert Thomas

2012-09-01T23:59:59.000Z

212

Landfill Leachate Treatment by Reverse Osmosis  

Science Journals Connector (OSTI)

Leachate from landfill sites represents a highly polluted waste water. It containes biodegradable compounds but also inorganic salts and trace recalcitrant pollutants. The reverse osmosis process with or without ...

B. Weber; F. Holz

1991-01-01T23:59:59.000Z

213

Fuel Cell Technologies Office: Reversible Fuel Cells Workshop  

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

Reversible Fuel Cells Reversible Fuel Cells Workshop to someone by E-mail Share Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on Facebook Tweet about Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on Twitter Bookmark Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on Google Bookmark Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on Delicious Rank Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on Digg Find More places to share Fuel Cell Technologies Office: Reversible Fuel Cells Workshop on AddThis.com... Publications Program Publications Technical Publications Educational Publications Newsletter Program Presentations Multimedia Conferences & Meetings Annual Merit Review Proceedings Workshop & Meeting Proceedings

214

Highly Reversible Mg Insertion in Nanostructured Bi for Mg Ion...  

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

Reversible Mg Insertion in Nanostructured Bi for Mg Ion Batteries. Highly Reversible Mg Insertion in Nanostructured Bi for Mg Ion Batteries. Abstract: Rechargeable magnesium...

215

Materials and System Issues with Reversible SOFC | Department...  

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

Reversible Fuel Cells Workshop Summary Report Advanced Materials for Reversible Solid Oxide Fuel Cell (RSOFC), Dual Mode Operation with Low Degradation Lessons Learned from...

216

Characterization of ion selective membranes for application in reverse  

E-Print Network (OSTI)

Characterization of ion selective membranes for application in reverse electrodialysis systems I would have imagined when I started. i #12;Abstract Reverse electrodialysis (RED) is a renewable

Kjelstrup, Signe

217

Reverse Osmosis for the Separation of Organics from Aqueous Solutions  

Science Journals Connector (OSTI)

Reverse osmosis (RO) has proved reliable and economically ... such effluents often contain organics as solvents. Reverse osmosis is very suitable for the treatment of... Its mod...

R. Rautenbach; I. Janisch

1988-01-01T23:59:59.000Z

218

Discrimination reversal learning in yearling horses  

E-Print Network (OSTI)

DISCRIMINATION REVERSAL LEARNING IN YEARLING HORSES A Thesis by JEANNA CHASTAIN FISKE Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December 1976... Major Subjects Animal Science DISCRIMINATION REVERSAL LEARNING IN YEARLING HORSES A Thesis by JEANNA CHASTAIN FISKE Approved as to style and content by& Chai an o Committee ad oi epartment Member Nem er December 1976 ABSTRACT Discrimination...

Fiske, Jeanna Chastain

1976-01-01T23:59:59.000Z

219

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

E-Print Network (OSTI)

(1998). . . . 12 10 Principal stress directions within a layer moving through a ramp region of a thrust by Wiltschko (1979). . 14 Potential secondary fault trajectories interpreted from maximum shear stresses in theoretical models by Rodgers... Sandstone Data: Lead Configuration B. . 10 Layer Thickness Measurements ? Clay Configuration A . . . 91 11 Limb Dips: Configuration A Clay Models. . . 113 12 Fold Measurements: Configuration A Clay Models . . . 113 13 Sandstone Data: Clay Configuration...

McLain, Christopher Thomas

2012-06-07T23:59:59.000Z

220

Superconducting Fault Current Limiter for Transmission Voltage  

Science Journals Connector (OSTI)

Within a collaboration of American Superconductor, Siemens, Nexans and Southern California Edison one electrical phase of a resistive superconducting fault current limiter for the 115kV transmission voltage level has been designed and manufactured. The active part of the limiter consists of 63 bifilar coils made of 12mm wide steel-stabilized YBCO conductor and is housed in a cryostat operated at 5bar and 74K. The first phase was completely assembled and successfully subjected to power switching tests and high voltage tests. The basic design of the system and the test results are reported. The work was funded in part by US-DOE under Contract Number DE-FC26-07NT43243.

Hans-Peter Kraemer; Wolfgang Schmidt; Hong Cai; Bruce Gamble; David Madura; Tim MacDonald; Joe McNamara; Walther Romanosky; Greg Snitchler; Nicolas Lallouet; Frank Schmidt; Syed Ahmed

2012-01-01T23:59:59.000Z

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


221

Experimental study on characteristics of superconducting fault current limiters connected  

Science Journals Connector (OSTI)

Superconducting fault current limiters (SCFCLs) can reduce fault current; thus SCFCLs allow the capacity of circuit breakers to be reduced and lend flexibility to power system network designs. Furthermore, SCFCLs are expected to improve power system stability, as has been confirmed by some experiments. Therefore, various kinds of SCFCLs were proposed and have been studied. For introducing SCFCLs in power systems, there should be some specifications, such as the impedance, the trigger current level, and the recovery time. Fault analyses pointed out that accuracy of the trigger current level is required. A transformer type SCFCL with an adjustable trigger current level was proposed, designed, made, and tested. Then, limiting tests on three-phase SCFCLs by use of an artificial transmission line with a small generator were carried out. The test results indicated that at phase-to-phase faults, the SCFCLs for the fault phases do not always turn into the limiting mode. From two points of view, it is important to study characteristics of the series connection for SCFCLs: one is as mentioned above, and the other is that a series connection of some SCFCLs of small impedance may be installed in place of an SCFCL of larger impedance. This paper describes the results of limiting tests on two SCFCLs connected in series. The tests were carried out under some different conditions of fault currents, fault phases, and trigger current levels of SCFCLs. Some discussion on characteristics of series connection of SCFCLs appears also.

Hiroyuki Hatta; Tanzo Nitta; Tomomi Oide; Masakuni Chiba; Yasuyuki Shirai; Akihiro Mochida

2004-01-01T23:59:59.000Z

222

Ergodicity in natural earthquake fault networks  

Science Journals Connector (OSTI)

Numerical simulations have shown that certain driven nonlinear systems can be characterized by mean-field statistical properties often associated with ergodic dynamics [C. D. Ferguson, W. Klein, and J. B. Rundle, Phys. Rev. E 60, 1359 (1999); D. Egolf, Science 287, 101 (2000)]. These driven mean-field threshold systems feature long-range interactions and can be treated as equilibriumlike systems with statistically stationary dynamics over long time intervals. Recently the equilibrium property of ergodicity was identified in an earthquake fault system, a natural driven threshold system, by means of the Thirumalai-Mountain (TM) fluctuation metric developed in the study of diffusive systems [K. F. Tiampo, J. B. Rundle, W. Klein, J. S. S Martins, and C. D. Ferguson, Phys. Rev. Lett. 91, 238501 (2003)]. We analyze the seismicity of three naturally occurring earthquake fault networks from a variety of tectonic settings in an attempt to investigate the range of applicability of effective ergodicity, using the TM metric and other related statistics. Results suggest that, once variations in the catalog data resulting from technical and network issues are accounted for, all of these natural earthquake systems display stationary periods of metastable equilibrium and effective ergodicity that are disrupted by large events. We conclude that a constant rate of events is an important prerequisite for these periods of punctuated ergodicity and that, while the level of temporal variability in the spatial statistics is the controlling factor in the ergodic behavior of seismic networks, no single statistic is sufficient to ensure quantification of ergodicity. Ergodicity in this application not only requires that the system be stationary for these networks at the applicable spatial and temporal scales, but also implies that they are in a state of metastable equilibrium, one in which the ensemble averages can be substituted for temporal averages in studying their spatiotemporal evolution.

K. F. Tiampo; J. B. Rundle; W. Klein; J. Holliday; J. S. S Martins; C. D. Ferguson

2007-06-22T23:59:59.000Z

223

SLIP ALONG THE SAN ANDREAS FAULT ASSOCIATED WITH THE EARTHQUAKE1  

E-Print Network (OSTI)

Imperial Valley earthquake occurred along other than the Imperial fault and the Brawley fault zone. More in the static- strain field that accompanied the earthquake. At about the same time in the 1979 Imperial Valley, similar behavior of the Imperial fault before 1979 suggests that this section ofthe San Andreas fault may

Tai, Yu-Chong

224

On-Line Fault Detection and Compensation of Hydraulic Driven Machines Using Modelling Techniques  

E-Print Network (OSTI)

On-Line Fault Detection and Compensation of Hydraulic Driven Machines Using Modelling Techniques C purpose of hydraulic driven machines as well as for the compensation of incipient faults where applicable: Modelling, Simulation, Hydraulic motors, Fault detection, Fault Compensation 1. Introduction Model

Thawonmas, Ruck

225

Dynamic neural network-based fault diagnosis of gas turbine engines  

Science Journals Connector (OSTI)

In this paper, a neural network-based fault detection and isolation (FDI) scheme is presented to detect and isolate faults in a highly nonlinear dynamics of an aircraft jet engine. Towards this end, dynamic neural networks (DNN) are first developed to ... Keywords: Aircraft jet engine, Bank of filters, Computational intelligence, Dynamic neural networks, Fault detection and isolation, Fault diagnosis, Multiple model schemes

S. Sina Tayarani-Bathaie; Z. N. Sadough Vanini; K. Khorasani

2014-02-01T23:59:59.000Z

226

Improving and Evaluating Differential Fault Analysis on LED with Algebraic Techniques  

E-Print Network (OSTI)

Improving and Evaluating Differential Fault Analysis on LED with Algebraic Techniques Xinjie Zhao.zhang,zshi,chm10010}@engr.uconn.edu Abstract--This paper proposes a fault analysis technique on LED by combining- ential fault analysis (ADFA). In ADFA on LED, we use DFA to deduce the possible fault differences

Shi, Zhijie Jerry

227

In situ measurement of the hydraulic diffusivity of the active Chelungpu Fault, Taiwan  

E-Print Network (OSTI)

.1. Boreholes of the Taiwan Chelungpu-Fault Drilling Project [6] The pair of boreholes used for this experiment shaking in the regions of large slip if the fault was sufficiently sealed. We investigate in situ in situ on an active large-scale fault. Hydraulic tests in deep bore- holes intersecting the Nojima fault

228

Thermal anomalies indicate preferential flow along faults in unconsolidated sedimentary aquifers  

E-Print Network (OSTI)

Thermal anomalies indicate preferential flow along faults in unconsolidated sedimentary aquifers V in unconsolidated siliciclastic aquifers off-set by normal-faults in the Lower Rhine Embayment, Germany. High plane. Most current models of fault hydrology in unconsolidated sedimentary sequences assume faults

Bense, Victor

229

Analysis of the growth of strike-slip faults using effective medium theory  

SciTech Connect

Increases in the dimensions of strike-slip faults including fault length, thickness of fault rock and the surrounding damage zone collectively provide quantitative definition of fault growth and are commonly measured in terms of the maximum fault slip. The field observations indicate that a common mechanism for fault growth in the brittle upper crust is fault lengthening by linkage and coalescence of neighboring fault segments or strands, and fault rock-zone widening into highly fractured inner damage zone via cataclastic deformation. The most important underlying mechanical reason in both cases is prior weakening of the rocks surrounding a fault's core and between neighboring fault segments by faulting-related fractures. In this paper, using field observations together with effective medium models, we analyze the reduction in the effective elastic properties of rock in terms of density of the fault-related brittle fractures and fracture intersection angles controlled primarily by the splay angles. Fracture densities or equivalent fracture spacing values corresponding to the vanishing Young's, shear, and quasi-pure shear moduli were obtained by extrapolation from the calculated range of these parameters. The fracture densities or the equivalent spacing values obtained using this method compare well with the field data measured along scan lines across the faults in the study area. These findings should be helpful for a better understanding of the fracture density/spacing distribution around faults and the transition from discrete fracturing to cataclastic deformation associated with fault growth and the related instabilities.

Aydin, A.; Berryman, J.G.

2009-10-15T23:59:59.000Z

230

Geometry and scaling relations of a population of very small rift-related normal faults  

E-Print Network (OSTI)

normal faults within the Solite Quarry of the Dan River rift basin range in length from a few millimetres AND SCALING RELATIONS The small normal faults are present in quarries of the Virginia Solite Corporation outcrops and quarried boulders (Fig. 2). The fault traces are typically straight, although the fault tips

231

MICRO-SEISMICITY, FAULT STRUCTURE AND HYDRAULIC COMPARTMENTALIZATION WITHIN  

Open Energy Info (EERE)

MICRO-SEISMICITY, FAULT STRUCTURE AND HYDRAULIC COMPARTMENTALIZATION WITHIN MICRO-SEISMICITY, FAULT STRUCTURE AND HYDRAULIC COMPARTMENTALIZATION WITHIN THE COSO GETHERMAL FIELD, CALIFORNIA Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: MICRO-SEISMICITY, FAULT STRUCTURE AND HYDRAULIC COMPARTMENTALIZATION WITHIN THE COSO GETHERMAL FIELD, CALIFORNIA Details Activities (1) Areas (1) Regions (0) Abstract: High precision earthquake locations and subsurface velocity structure provide potential insights into fracture system geometry, fluid conduits and fluid compartmentalization critical to geothermal reservoir management. We analyze 16 years of seismicity to improve hypocentral locations and simultaneously invert for the seismic velocity structure within the Coso Geothermal Field (CGF). The CGF has been continuously

232

Visualization of stacking faults in fcc crystals in plastic deformations  

E-Print Network (OSTI)

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.

Takeshi Kawasaki; Akira Onuki

2011-11-27T23:59:59.000Z

233

Superconducting fault current limiter for power utility application  

SciTech Connect

Recent accomplishments in the development of superconducting fault current limiters for power systems are outlined. These accomplishments include the comprehensive requirement for fault current limiters developed by SCE; down-selection; bridge concepts; shunt concepts; and high resistivity matrix substrates for HTS conductors. The proposed Phase II SPI-FCL Program is outlined. It is concluded that the SPI fault current limiter program will benefit both the power utility industry as well as the high temperature superconductivity community and progress of Phase I is right on target.

Leung, E. [Martin Marietta Corp., Oak Ridge, TN (United States)

1994-07-29T23:59:59.000Z

234

Fault-tree construction and calculations on a microcomputer  

E-Print Network (OSTI)

Figure 17 - Program Overview Screen Figure 18 ? Main Menu Screen Figure 19 ? Invalid Command Screen Figure 20 - First Usage of Disk Screen Figure 21 ? Fault-tree Name Screen Figure 22 - Invalid Fault-tree Name Screen Fi gure 23 ? TOP EVENT Label... to do? Fi gure 19. Inval i d Command Screen 53 CREATE - This command allows the user to build a new fault tree. After a CREATE command is entered, the system wi 1 1 display the screen in Figure 20. This question is asked in order to determine...

Beckmann, Jeffery Linn

1985-01-01T23:59:59.000Z

235

The Portland Hills Fault: uncovering a hidden fault in Portland, Oregon using high-resolution geophysical methods  

Science Journals Connector (OSTI)

The Portland metropolitan area historically is the most seismically active region in Oregon. At least three potentially active faults are located in the immediate vicinity of downtown Portland, with the Portland Hills Fault (PHF) extending directly beneath downtown Portland. The faults are poorly understood, and the surface geologic record does not provide the information required to assess the seismic hazards associated with them. The limited geologic information stems from a surface topography that has not maintained a cumulative geologic record of faulting, in part, due to rapid erosion and deposition from late Pleistocene catastrophic flood events and a possible strike-slip component of the faults. We integrated multiple high-resolution geophysical techniques, including seismic reflection, ground penetrating radar (GPR), and magnetic methods, with regional geological and geophysical surveys to determine that the Portland Hills Fault is presently active with a zone of deformation that extends at least 400 m. The style of deformation is consistent with at least two major earthquakes in the last 1215 ka, as confirmed by a sidehill excavation trench. High-resolution geophysical methods provide detailed images of the upper 100 m across the active fault zone. The geophysical images are critical to characterizing the structural style within the zone of deformation, and when integrated with a paleoseismic trench, can accurately record the seismic history of a region with little surface geologic exposure.

Lee M. Liberty; Mark A. Hemphill-Haley; Ian P. Madin

2003-01-01T23:59:59.000Z

236

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

E-Print Network (OSTI)

), evaporator fouling (Evapfoul), liquid-line restriction (Llrestr), low refrigerant charge (Reflow), and refrigerant high charge (Refhigh). Except for refrigerant charge and compressor leakage faults for which five fault levels were introduced, four fault... for these tests. The method could detect low refrigerant charge and loss of compressor performance at the lowest levels introduced and all other faults at the second level. All of the faults could be reliably diagnosed before a 5% degradation in capacity...

Li, H.; Braun, J.

2006-01-01T23:59:59.000Z

237

Recency of Faulting and Neotectonic Framework in the Dixie Valley  

Open Energy Info (EERE)

of Faulting and Neotectonic Framework in the Dixie Valley of Faulting and Neotectonic Framework in the Dixie Valley Geothermal Field and Other Geothermal Fields of the Basin and Range Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Recency of Faulting and Neotectonic Framework in the Dixie Valley Geothermal Field and Other Geothermal Fields of the Basin and Range Abstract We studied the role that earthquake faults play in redistributing stresses within in the earths crust near geothermal fields. The geographic foci of our study were the sites of geothermal plants in Dixie Valley, Beowawe, and Bradys Hot Springs, Nevada. Our initial results show that the past history of earthquakes has redistributed stresses at these 3 sites in a manner to open and maintain fluid pathways critical for geothermal development. The

238

Aksaray And Ecemis Faults - Diapiric Salt Relationships- Relevance To The  

Open Energy Info (EERE)

Aksaray And Ecemis Faults - Diapiric Salt Relationships- Relevance To The Aksaray And Ecemis Faults - Diapiric Salt Relationships- Relevance To The Hydrocarbon Exploration In The Tuz Golu (Salt Lake) Basin, Central Anatolia, Turkey Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Aksaray And Ecemis Faults - Diapiric Salt Relationships- Relevance To The Hydrocarbon Exploration In The Tuz Golu (Salt Lake) Basin, Central Anatolia, Turkey Details Activities (0) Areas (0) Regions (0) Abstract: Due to activitiy of the Aksaray and Ecemis Faults, volcanic intrusion and westward movement of the Anatolian plate, diapiric salt structures were occurred in the Tuz Golu (Salt Lake) basin in central Anatolia, Turkey. With the collisions of the Arabian and Anatolian plates during the late Cretaceous and Miocene times, prominent ophiolitic

239

Recency Of Faulting And Neotechtonic Framework In The Dixie Valley  

Open Energy Info (EERE)

Of Faulting And Neotechtonic Framework In The Dixie Valley Of Faulting And Neotechtonic Framework In The Dixie Valley Geothermal Field And Other Geothermal Fields Of The Basin And Range Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Recency Of Faulting And Neotechtonic Framework In The Dixie Valley Geothermal Field And Other Geothermal Fields Of The Basin And Range Details Activities (6) Areas (3) Regions (0) Abstract: We studied the role that earthquake faults play in redistributing stresses within in the earths crust near geothermal fields. The geographic foci of our study were the sites of geothermal plants in Dixie Valley, Beowawe, and Bradys Hot Springs, Nevada. Our initial results show that the past history of earthquakes has redistributed stresses at these 3 sites in a manner to open and maintain fluid pathways critical for geothermal

240

Understanding Fault Characteristics And Sediment Depth For Geothermal  

Open Energy Info (EERE)

Understanding Fault Characteristics And Sediment Depth For Geothermal Understanding Fault Characteristics And Sediment Depth For Geothermal Exploration Using 3D Gravity Inversion In Walker Valley, Nevada Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Understanding Fault Characteristics And Sediment Depth For Geothermal Exploration Using 3D Gravity Inversion In Walker Valley, Nevada Details Activities (2) Areas (1) Regions (0) Abstract: The Southern Walker Lake Basin, situated in the Walker Lake structural domain, consists 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 showed elevated temperatures. Two recent drill holes reaching downhole depths of more than 4000 ft give some insight to the geologic picture, but more information

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


241

Geophysical investigation of concealed faults near Yucca Mountain, southwest Nevada  

SciTech Connect

Detailed gravity and ground magnetic data collected along surveyed traverses across Midway Valley, on the eastern flank of Yucca Mountain, Nevada reveal that these methods can be used to delineate concealed faults. These studies are part of an effort to evaluate faulting in the vicinity of the proposed surface facilities for a potential nuclear waste repository at Yucca Mountain. The largest gravity and magnetic anomaly in the vicinity of Midway Valley is associated with the Paintbrush fault on the west flank of Alice Ridge. Geophysical data infer a vertical offset of about 200 m (650 ft). Another prominent gravity and magnetic anomaly is associated with the Bow Ridge fault in the western part of Midway Valley.

Ponce, D.A. [Geological Survey, Menlo Park, CA (United States)

1993-12-31T23:59:59.000Z

242

Unknown Input Observers and Fault Tolerant Control Allocation Andrea Cristofaro  

E-Print Network (OSTI)

objectives [3] [13] [17] , such as power or fuel consumption minimization. On the other hand, usually in order to make relevant faults observable. The case study of an overactuated marine vessel supports

Johansen, Tor Arne

243

CAPRI: A Common Architecture for Distributed Probabilistic Internet Fault Diagnosis  

E-Print Network (OSTI)

This thesis presents a new approach to root cause localization and fault diagnosis in the Internet based on a Common Architecture for Probabilistic Reasoning in the Internet (CAPRI) in which distributed, heterogeneous ...

Lee, George J.

2007-06-04T23:59:59.000Z

244

CAPRI : a common architecture for distributed probabilistic Internet fault diagnosis  

E-Print Network (OSTI)

This thesis presents a new approach to root cause localization and fault diagnosis in the Internet based on a Common Architecture for Probabilistic Reasoning in the Internet (CAPRI) in which distributed, heterogeneous ...

Lee, George J. (George Janbing), 1979-

2007-01-01T23:59:59.000Z

245

Fault current limiter based on triggered vacuum switch  

Science Journals Connector (OSTI)

A new type of fault current limiter (FCL) based on triggered vacuum switch ... is mainly composed of a capacitor, a current-limiting reactor connected with a capacitor in ... behaves as a conventional series comp...

Jing Shi; Ji-yan Zou; Jun-jia He

2000-12-01T23:59:59.000Z

246

Coil and HTS Development for Fault Current Limiters  

Science Journals Connector (OSTI)

Fault current limiters are being developed to limit peak currents in transmission and distribution systems. The authors ... and a coil configuration specifically for high transient currents and the resulting high...

B. Gamble; G. Snitchler; M. Manlief

1997-01-01T23:59:59.000Z

247

Melt-processed YBCO for a Fault Current Limiter  

Science Journals Connector (OSTI)

Bulk High-Tc...-Superconductors (HTSC) offer applications in the field of fault current limiters in power networks: Current limitation can be accomplished by means of ... with a primary winding carrying the power...

H. Kanbach; E. Bochenek; M. Trautmann; R. Fischer

1994-01-01T23:59:59.000Z

248

Understanding Fault Characteristics And Sediment Depth For Geothermal...  

Open Energy Info (EERE)

Fault Characteristics And Sediment Depth For Geothermal Exploration Using 3D Gravity Inversion In Walker Valley, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to...

249

Characteristics of Wind Turbines Under Normal and Fault Conditions: Preprint  

SciTech Connect

This paper investigates the characteristics of a variable-speed wind turbine connected to a stiff or weak grid under normal and fault conditions and the role of reactive power compensation.

Muljadi, E.; Butterfield, C. P.; Parsons, B.; Ellis, A.

2007-02-01T23:59:59.000Z

250

Lossless fault-tolerant data structures with additive overhead  

E-Print Network (OSTI)

We develop the first dynamic data structures that tolerate ? memory faults, lose no data, and incur only an O(? ) additive overhead in overall space and time per operation. We obtain such data structures for arrays, linked ...

Christiano, Paul F.

251

8 - Superconducting fault current limiters and power cables  

Science Journals Connector (OSTI)

Abstract: This chapter addresses the technology of superconducting power cables and superconducting fault current limiters. The first part of the chapter is a general summary of the electric power grid. This sets the stage for a discussion of the historical development of superconducting AC and DC cables, which begins with low temperature superconductor-based systems. It then describes the present state of superconducting cable technology and gives a summary of some of the major programs around the world. Whereas power cables may be thought of as a replacement for conventional power system components, fault current limiters and fault current controllers have no conventional equivalent in the power grid. Several conceptually different fault current limiter designs are described. Their state of development and installation on the power grid are described.

W. Hassenzahl

2012-01-01T23:59:59.000Z

252

Performance analysis of fault-tolerant nanoelectronic memories  

E-Print Network (OSTI)

important that defect and fault-tolerant schemes be incorporated into the design of nanotechnology related devices. In this dissertation, we focus on the study of a novel and promising class of computer chip memories called crossbar molecular switch memories...

Coker, Ayodeji

2009-05-15T23:59:59.000Z

253

Detecting and Tolerating Byzantine Faults in Database Systems  

E-Print Network (OSTI)

This thesis describes the design, implementation, and evaluation of a replication scheme to handle Byzantine faults in transaction processing database systems. The scheme compares answers from queries and updates on multiple ...

Vandiver, Benjamin Mead

2008-06-30T23:59:59.000Z

254

Detecting and tolerating Byzantine faults in database systems  

E-Print Network (OSTI)

This thesis describes the design, implementation, and evaluation of a replication scheme to handle Byzantine faults in transaction processing database systems. The scheme compares answers from queries and updates on multiple ...

Vandiver, Benjamin Mead, 1978-

2008-01-01T23:59:59.000Z

255

A fault detection service for wide area distributed computations.  

SciTech Connect

The potential for faults in distributed computing systems is a significant complicating factor for application developers. While a variety of techniques exist for detecting and correcting faults, the implementation of these techniques in a particular context can be difficult. Hence, we propose a fault detection service designed to be incorporated, in a modular fashion, into distributed computing systems, tools, or applications. This service uses well-known techniques based on unreliable fault detectors to detect and report component failure, while allowing the user to tradeoff timeliness of reporting against false positive rates. We describe the architecture of this service, report on experimental results that quantify its cost and accuracy, and describe its use in two applications, monitoring the status of system components of the GUSTO computational grid testbed and as part of the NetSolve network-enabled numerical solver.

Stelling, P.

1998-06-09T23:59:59.000Z

256

A Fault Detection and Diagnosis Method for HVAC Systems  

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

A Fault Detection and Diagnosis Method for HVAC Systems A Fault Detection and Diagnosis Method for HVAC Systems Speaker(s): Peng Xu Date: December 2, 2002 - 12:00pm Location: Bldg. 90 There is a growing consensus that most buildings do not perform as well as intended and that faults in HVAC systems are widespread in commercial buildings. An automated fault detection and diagnosis tool for HVAC systems is being developed, based on an integrated, life-cycle, approach to commissioning and performance monitoring. The tool uses component-level HVAC equipment models implemented in the SPARK equation-based simulation environment. The models are configured using design information and component manufacturers' data and then fine-tuned to match the actual performance of the equipment by using data measured during functional tests

257

Fault Mapping At Coso Geothermal Area (1980) | Open Energy Information  

Open Energy Info (EERE)

Fault Mapping At Coso Geothermal Area (1980) Fault Mapping At Coso Geothermal Area (1980) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Fault Mapping At Coso Geothermal Area (1980) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Fault Mapping Activity Date 1980 Usefulness useful DOE-funding Unknown Exploration Basis To determine the Late Cenozoic volcanism, geochronology, and structure of the Coso Range Notes This system apparently is heated by a reservoir of silicic magma at greater than or equal to 8-km depth, itself produced and sustained through partial melting of crustal rocks by thermal energy contained in mantle-derived basaltic magma that intrudes the crust in repsonse to lithospheric extension. References Duffield, W.A.; Bacon, C.R.; Dalrymple, G.B. (10 May 1980) Late

258

Reverse-Engineering Banks' Financial Strength Ratings Using ...  

E-Print Network (OSTI)

Dec 27, 2006 ... reverse-engineering a superior bank rating system, which turns out to ...... sector (

mal92

2009-05-16T23:59:59.000Z

259

Reversed Doppler effect under reflection from a shock electromagnetic wave  

Science Journals Connector (OSTI)

The possibility of observing the reversed Doppler effect in an electrodynamic system of coupled transmission...

A. M. Belyantsev; A. B. Kozyrev

2002-11-01T23:59:59.000Z

260

Fault simulation of combinational circuits based on critical path tracing  

E-Print Network (OSTI)

FAULT SIMULATION Ol' COMBINATIONAI, CIRCUITS BASED ON CRITICAL PATH TRACING A Thesis by CHARLES JAMES BURNETT Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1992 Major Subject: Electrical Engineering FAULT SIIUIULATION OF COMBINATlONAL CIRCUITS BASED ON CRITICAL PATH TRACINC A Thesis CHARLES JAMES BURNETT Approved as to style and content by: Don E. Ross (Chair of Committee...

Burnett, Charles James

1992-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "reverse fault rectangles" from the National Library of EnergyBeta (NLEBeta).
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261

Neural net application to transmission line fault detection and classification  

E-Print Network (OSTI)

NEURAL NET APPLICATION TO TRANSMISSION LINE FAULT DETECTION AND CLASSIFICATION A Thesis by IGOR RIKALO Submitted to Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approve as to style... Applicanon to Transmission Line Fault Detection and Classification. (December 1994) Igor Rikalo, B. S. University of Sarajevo Chair of Advisory Committee: Dr. Mladen Kezunovic Today, in electric power systems, a large amount of data is made readily...

Rikalo, Igor

2012-06-07T23:59:59.000Z

262

A dc superconducting fault current limiter using die-pressed  

Science Journals Connector (OSTI)

A model of a superconducting fault current limiter on a polycrystalline high-temperature superconductor basis is checked in the dc short circuit regime. Protection of load takes place under the conditions described in this paper. The use of ceramic materials with superconducting-normal metal-superconducting Josephson junction network having an S-type current-voltage characteristic (CVC) is shown to be effective for fault current limiter devices.

A G Mamalis; M I Petrov; D A Balaev; K A; D M Gohfeld; S V Militsyn; S G; V I Kirko; I N Vottea

2001-01-01T23:59:59.000Z

263

The application of satellite time references to HVDC fault location  

SciTech Connect

An HVdc fault location scheme is described which relies on very precise detection of the time of arrival of fault created surges at both ends of the line. Such detection is achieved by a very accurate data acquisition and processing system combined with the time reference signals provided by a global positioning system receiver. Extensive digital simulation is carried out to determine the voltage and current waveforms, to identify the main sources of error and suggest possible compensation techniques.

Dewe, M.B.; Sankar, S.; Arrillaga, J. (Univ. of Canterbury, Christchurch (New Zealand))

1993-07-01T23:59:59.000Z

264

Limiting characteristics of the superconducting fault current limiter applied to the neutral line of conventional transformer  

Science Journals Connector (OSTI)

Abstract The increased electricity demands influenced by the recent industrial development make the electric power distribution system more comprehensive, and the risks are high to cause failures to steady state electric line due to the extended range of fault at the time of fault occurrence. Also, the high performance and the high precision electric appliances that sensitive to switching surge and fault current expose vulnerability of reduced life span and increased fault occurrence ratio. Therefore, this thesis analyzed the fault limiting characteristics by the fault types by applying the superconducting fault current limiter to the neutral line of the transformer in order to reduce the fault currents that flow such high performance appliances. A current transformer (CT) that detects the fault current in the simulated power distribution system, a switching control system that is self-developed and a transformer are used in constructing a circuit. When a fault occurs, the initial fault current is restricted by the superconducting fault current limiter and simultaneously detours the fault current by operating the SCR contact of the switching control system through the detection by CT. This thesis analyzed the limiting characteristics of the superconducting fault current limiter that are applied to the neutral line of the transformer by the fault types.

I.G. Im; H.S. Choi; B.I. Jung

2013-01-01T23:59:59.000Z

265

Reversing the Circulation of Magnetic Vortices  

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

Reversing the Circulation of Magnetic Vortices Print Reversing the Circulation of Magnetic Vortices Print In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

266

Reversing the Circulation of Magnetic Vortices  

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

Reversing the Circulation of Magnetic Vortices Print Reversing the Circulation of Magnetic Vortices Print In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

267

Reversing the Circulation of Magnetic Vortices  

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

Reversing the Circulation of Magnetic Vortices Print Reversing the Circulation of Magnetic Vortices Print In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

268

Reversing the Circulation of Magnetic Vortices  

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

Reversing the Circulation of Magnetic Vortices Print Reversing the Circulation of Magnetic Vortices Print In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

269

Reversing the Circulation of Magnetic Vortices  

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

Reversing the Circulation of Magnetic Vortices Print Reversing the Circulation of Magnetic Vortices Print In magnetic media, information is stored in binary form-one or zero, depending on which way the electronic spins are aligned in a given section of the medium. Recently, however, magnetic vortices have drawn scientists toward a new possibility: multibit storage in which each logic unit has four states instead of two and can store twice the information. Each tiny magnetic whirl has a polarity that can point up or down and a circulation that can be oriented clockwise or counterclockwise. Previous studies have shown that the polarity can be flipped on command. Now, using time-resolved magnetic soft x-ray microscopy at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation.

270

Development of an integrated reverse engineering system  

Science Journals Connector (OSTI)

This paper describes the development of a customised reverse engineering system in which a 3D digitiser (MicroScribe-3DX) has been integrated with a computer-aided design (CAD) system (Pro/ENGINEER). The application programme written in C language enables a real-time input from the digitiser to Pro/ENGINEER. Two Application Programming Interfaces (APIs) were used: the MicroScribe-3D Software Development Kit (SDK) and Pro/TOOLKIT. The former allows the user to develop an integrated system through intuitive and high-level function calls to the digitiser. The latter enables a user to customise a Pro/ENGINEER environment. This system offers an intuitive and user-friendly means for reverse engineering. It also helps to shorten the whole reverse engineering process. This is because the digitised data can be displayed and edited in real time, so that early identification and exclusion of the undesired and incorrect data are made possible.

X.W. Xu; L. Song

2006-01-01T23:59:59.000Z

271

Optimal design of reverse osmosis module networks  

SciTech Connect

The structure of individual reverse osmosis modules, the configuration of the module network, and the operating conditions were optimized for seawater and brackish water desalination. The system model included simple mathematical equations to predict the performance of the reverse osmosis modules. The optimization problem was formulated as a constrained multivariable nonlinear optimization. The objective function was the annual profit for the system, consisting of the profit obtained from the permeate, capital cost for the process units, and operating costs associated with energy consumption and maintenance. Optimization of several dual-stage reverse osmosis systems were investigated and compared. It was found that optimal network designs are the ones that produce the most permeate. It may be possible to achieve economic improvements by refining current membrane module designs and their operating pressures.

Maskan, F.; Wiley, D.E.; Johnston, L.P.M.; Clements, D.J.

2000-05-01T23:59:59.000Z

272

Fault Current Limit (FCL) Technology (Magnetic Valve Controlled Reactor-Type Fault Current Limiter Principle and Simulation)  

Science Journals Connector (OSTI)

Summarized the FCL practical research which faces to the key technical problems, briefly introduces the study of magnetic valve controllable reactor type fault current limiter principle, and the simulation result...

Chunzhe Shi

2012-01-01T23:59:59.000Z

273

Tokamak Equilibria with Reversed Current Density  

Science Journals Connector (OSTI)

Observations of nearly zero toroidal current in the central region of tokamaks (the current hole) raises the question of the existence of toroidal equilibria with very low or reversed current in the core. The solutions of the Grad-Shafranov equilibrium equation with hollow toroidal current density profile including negative current density in the plasma center are investigated. Solutions of the corresponding eigenvalue problem provide simple examples of such equilibrium configurations. More realistic equilibria with toroidal current density reversal are computed using a new equilibrium problem formulation and computational algorithm which do not assume nested magnetic surfaces.

A. A. Martynov; S. Yu. Medvedev; L. Villard

2003-08-21T23:59:59.000Z

274

Reversed Doppler Effect in Photonic Crystals  

Science Journals Connector (OSTI)

Nonrelativistic reversed Doppler shifts have never been observed in nature and have only been speculated to occur in pathological systems with simultaneously negative effective permittivity and permeability. This Letter presents a different, new physical phenomenon that leads to a nonrelativistic reversed Doppler shift in light. It arises when light is reflected from a moving shock wave propagating through a photonic crystal. In addition to reflection of a single frequency, multiple discrete reflected frequencies or a 10GHz periodic modulation can also be observed when a single carrier frequency of wavelength 1????m is incident.

Evan J. Reed; Marin Solja?i?; John D. Joannopoulos

2003-09-23T23:59:59.000Z

275

Influence of fault type on the optimal location of superconducting fault current limiter in electrical power grid  

Science Journals Connector (OSTI)

Abstract This paper presents a novel approach to determine the optimal location of a resistive superconducting fault current limiter (SFCL) to improve the transient stability of an electric power grid (EPG). The presented method use the angular separation of the rotors of synchronous machines present in the power system to select the optimal location of SFCL. The selection of this optimal location is coordinated with the corresponding optimal resistive value to improve transient stability in case of short-circuit fault. To obtain a global study on the optimal placement of SFCL in case of fault, various types of short-circuits are considered (single phase grounded fault, two phases grounded fault, etc.). To evaluate the effectiveness of the proposed method, the IEEE benchmarked four-machine two-area test system is used to carry out several case studies. It is shown that the optimal location of SFCL as well as its optimal resistance value are not the same for each fault studied. A global analysis of EPG stability is presented in the paper to select only one location of the SFCL in the EPG. Results show that the optimal location of SFCL combined with its optimal resistive value reduces the angular separation of the rotors that improves effectively the stability of the EPG for any type of short-circuit.

G. Didier; J. Lvque

2014-01-01T23:59:59.000Z

276

Vibrant fault diagnosis for hydroelectric generator units with a new combination of rough sets and support vector machine  

Science Journals Connector (OSTI)

The fault diagnosis for hydroelectric generator unit (HGU) is significant to prevent dangerous accidents from occurring and to improve economic efficiency. The faults of HGU involve overlapping fault patterns which may denote a kind of faults in the ... Keywords: Fault diagnosis, Hydroelectric generator unit, Rough sets, Support vector machine

Xiaoyuan Zhang; Jianzhong Zhou; Jun Guo; Qiang Zou; Zhiwei Huang

2012-02-01T23:59:59.000Z

277

Provenance evidence for major postearly Pennsylvanian dextral slip on the Picuris-Pecos fault, northern New Mexico  

Science Journals Connector (OSTI)

...Pf-Pajarito fault, GMf-Glorieta Mesa fault, SdCff-Sangre de Cristo frontal...TCf-Tijeras-Canoncito fault, Cf-Chupadera fault, Tf-Tecolote fault, SHf-Sand...2009, Tectonics of the Chupadera Mesa region, central New Mexico: New...

Steven M. Cather; Adam S. Read; Nelia W. Dunbar; Barry S. Kues; Karl Krainer; Spencer G. Lucas; Shari A. Kelley

278

Characterizing fault-plume intersection probability for geologic carbon sequestration risk assessment  

SciTech Connect

Leakage of CO{sub 2} out of the designated storage region via faults is a widely recognized concern for geologic carbon sequestration. The probability of such leakage can be separated into the probability of a plume encountering a fault and the probability of flow along such a fault. In the absence of deterministic fault location information, the first probability can be calculated from regional fault population statistics and modeling of the plume shape and size. In this study, fault statistical parameters were measured or estimated for WESTCARB's Phase III pilot test injection in the San Joaquin Valley, California. Combining CO{sub 2} plume model predictions with estimated fault characteristics resulted in a 3% probability that the CO{sub 2} plume will encounter a fault fully offsetting the 180 m (590 ft) thick seal. The probability of leakage is lower, likely much lower, as faults with this offset are probably low-permeability features in this area.

Jordan, Preston D.; Oldenburg, Curtis M.; Nicot, Jean-Philippe

2008-11-01T23:59:59.000Z

279

An Explanation for Beta's Mean-reversion  

E-Print Network (OSTI)

for the designation as an UNDERGRADUATE RESEARCH SCHOLAR Approved by Research Advisor: Dr. Dennis Jansen May 2014 Major: Economics TABLE OF CONTENTS Page ABSTRACT.................................................................................................................................. 8 1 ABSTRACT An Explanation for Betas Mean Reversion. (May 2014) Connor Matthew Bodkin Department of Economics Texas A&M University Research Advisor: Dr. Dennis Jansen Department of Economics This study aims to improve upon...

Bodkin, Connor Matthew

2013-09-26T23:59:59.000Z

280

Mitochondrial modulation: reversible phosphorylation takes center stage?  

E-Print Network (OSTI)

.5 billion years, mitochondria have evolved from oxygen-scavenging bacterial symbionts into pri- mary controlMitochondrial modulation: reversible phosphorylation takes center stage? David J. Pagliarini1 and Center for Human Genetics Research, Massachusetts General Hospital, Boston, MA 02114, USA In the past 1

Pagliarini, David J.

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


281

Flow reversal power limit for the HFBR  

SciTech Connect

The High Flux Beam Reactor (HFBR) is a pressurized heavy water moderated and cooled research reactor that began operation at 40 MW. The reactor was subsequently upgraded to 60 MW and operated at that level for several years. The reactor undergoes a buoyancy-driven reversal of flow in the reactor core following certain postulated accidents. Questions which were raised about the afterheat removal capability during the flow reversal transition led to a reactor shutdown and subsequent resumption of operation at a reduced power of 30 MW. An experimental and analytical program to address these questions is described in this report. The experiments were single channel flow reversal tests under a range of conditions. The analytical phase involved simulations of the tests to benchmark the physical models and development of a criterion for dryout. The criterion is then used in simulations of reactor accidents to determine a safe operating power level. It is concluded that the limit on the HFBR operating power with respect to the issue of flow reversal is in excess of 60 MW. Direct use of the experimental results and an understanding of the governing phenomenology supports this conclusion.

Cheng, L.Y.; Tichler, P.R.

1997-01-01T23:59:59.000Z

282

Reversing entanglement change by a weak measurement  

E-Print Network (OSTI)

PHYSICAL REVIEW A 82, 052323 (2010) Reversing entanglement change by a weak measurement Qingqing Sun,1,* M. Al-Amri,2 Luiz Davidovich,3 and M. Suhail Zubairy1 1Department of Physics and Institute for Quantum Science and Engineering, Texas A...

Sun, Qingqing; Al-Amri, M.; Davidovich, Luiz; Zubairy, M. Suhail.

2010-01-01T23:59:59.000Z

283

Localized rotation of principal stress around faults and fractures determined from borehole breakouts in hole B of the Taiwan Chelungpu-fault Drilling Project (TCDP)  

Science Journals Connector (OSTI)

To reveal details of stress perturbations associated with faults and fractures, we investigated the faults and large fractures accompanied by stress-induced borehole breakouts or drilling-induced tensile fractures in hole B of the Taiwan Chelungpu-fault Drilling Project (TCDP). Then, we determined the relationship between the faults and fractures and stress orientation changes. We identified faults and fractures from electrical images of the borehole wall obtained by downhole logging but also from photographs and descriptions of retrieved core samples, and measured the variations in the principal horizontal stress orientation ascertained from borehole breakouts observed on the electrical images in the vicinity of the faults and fractures. Identification of geological structures (faults, fractures, and lithologic boundaries) by electrical images only is difficult and may sometimes yield incorrect results. In a novel approach, therefore, we used both the electrical images and core photographs to identify geological structures. We found four patterns of stress orientation change, or no change, in the vicinity of faults and fractures in TCDP hole B: (i) abrupt (discontinuous) rotation in the vicinity of faults or fractures; (ii) gradual rotation; (iii) suppression of breakouts at faults, fractures, or lithologic boundaries; and (iv) no change in the stress orientation. We recognized stress fluctuations, that is, heterogeneous mesoscale (?10cm) stress distributions with respect to both stress orientation and magnitude. In addition, we found that stress state changes occurred frequently in the vicinity of faults, fractures, and lithologic boundaries.

Weiren Lin; En-Chao Yeh; Jih-Hao Hung; Bezalel Haimson; Tetsuro Hirono

2010-01-01T23:59:59.000Z

284

Prediction of marine diesel engine performance under fault conditions  

Science Journals Connector (OSTI)

The diesel engine, due to its superior efficiency when compared to other thermal engines, is widely used for propulsion of marine vessels. Since in such applications the power concentration is critical, most marine diesel engines are of the turbocharged type. Turbocharging has a serious effect on engine performance due to the interaction between the turbocharger and the engine. This interaction makes the detection of engine faults extremely difficult since a specific fault affects the turbocharger and through it the engine. For this reason various methods have been proposed for the detection of engine faults. The present author has in the past presented a method for marine diesel diagnosis by processing measured engine data using a simulation model. In the present work a completely different approach is followed; an attempt is made to use a simulation model to predict marine diesel engine performance under various fault conditions. The method is applied to a newly built vessel powered by a slow speed two stroke marine diesel engine. Using the engine shop trial data obtained under propeller law the simulation model constants are determined, using an automatic method that has been developed. The comparison of results obtained with the data from the official shop trials confirms the accuracy of the model and its ability to predict almost all operating parameters of the engine. The model is then used to produce results by simulating various engine faults or faults of its subsystems. From this analysis their impact on various measurable engine parameters is determined. It is interesting to see that in the case of turbocharged engines some faults have a different effect when compared to naturally aspirated ones. Also, it is revealed that without the use of modeling in many cases it is relatively difficult to determine the actual cause for an engine malfunction, since the observed effects on engine performance are similar. The proposed method is promising and assists the engineer to understand the actual effect of various faults on engine performance. Also it can be used as a training tool since it is easy to simulate various engine faults, a procedure which is extremely difficult, if not impossible, to perform on the field.

Dimitrios T Hountalas

2000-01-01T23:59:59.000Z

285

Accident Fault Trees for Defense Waste Processing Facility  

SciTech Connect

The purpose of this report is to document fault tree analyses which have been completed for the Defense Waste Processing Facility (DWPF) safety analysis. Logic models for equipment failures and human error combinations that could lead to flammable gas explosions in various process tanks, or failure of critical support systems were developed for internal initiating events and for earthquakes. These fault trees provide frequency estimates for support systems failures and accidents that could lead to radioactive and hazardous chemical releases both on-site and off-site. Top event frequency results from these fault trees will be used in further APET analyses to calculate accident risk associated with DWPF facility operations. This report lists and explains important underlying assumptions, provides references for failure data sources, and briefly describes the fault tree method used. Specific commitments from DWPF to provide new procedural/administrative controls or system design changes are listed in the ''Facility Commitments'' section. The purpose of the ''Assumptions'' section is to clarify the basis for fault tree modeling, and is not necessarily a list of items required to be protected by Technical Safety Requirements (TSRs).

Sarrack, A.G.

1999-06-22T23:59:59.000Z

286

Grain-scale Comminution and Alteration of Arkosic Rocks in the Damage Zone of the San Andreas Fault at SAFOD  

E-Print Network (OSTI)

is cut by numerous subsidiary faults that display extensive evidence of repeating episodes of compaction, shear, dilation, and cementation. The subsidiary faults are grouped into three size classes: 1) small faults, 1 to 2 mm thick, that record an early...

Heron, Bretani

2012-02-14T23:59:59.000Z

287

A REVERSE SHOCK IN GRB 130427A  

SciTech Connect

We present extensive radio and millimeter observations of the unusually bright GRB 130427A at z = 0.340, spanning 0.67-12 days after the burst. We combine these data with detailed multi-band UV, optical, NIR, and Swift X-ray observations and find that the broadband afterglow emission is composed of distinct reverse shock and forward shock contributions. The reverse shock emission dominates in the radio/millimeter and at ?< 0.1 days in the UV/optical/NIR, while the forward shock emission dominates in the X-rays and at ?> 0.1 days in the UV/optical/NIR. We further find that the optical and X-ray data require a wind circumburst environment, pointing to a massive star progenitor. Using the combined forward and reverse shock emission, we find that the parameters of the burst include an isotropic kinetic energy of E{sub K,{sub iso}} ? 2 10{sup 53} erg, a mass loss rate of M-dot ?310{sup -8} M{sub ?} yr{sup 1} (for a wind velocity of 1000 km s{sup 1}), and a Lorentz factor at the deceleration time of ?(200 s) ? 130. Due to the low density and large isotropic energy, the absence of a jet break to ?15 days places only a weak constraint on the opening angle, ?{sub j} ?> 2.5, and therefore a total energy of E{sub ?} + E{sub K} ?> 1.2 10{sup 51} erg, similar to other gamma-ray bursts (GRBs). The reverse shock emission is detectable in this burst due to the low circumburst density, which leads to a slow cooling shock. We speculate that this property is required for the detectability of reverse shocks in radio and millimeter bands. Following on GRB 130427A as a benchmark event, observations of future GRBs with the exquisite sensitivity of the Very Large Array and ALMA, coupled with detailed modeling of the reverse and forward shock contributions, will test this hypothesis.

Laskar, T.; Berger, E.; Zauderer, B. A.; Margutti, R.; Soderberg, A. M.; Chakraborti, S.; Lunnan, R.; Chornock, R. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Chandra, P. [National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune University Campus, Ganeshkhind, Pune 411 007 (India); Ray, A. [Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005 (India)

2013-10-20T23:59:59.000Z

288

On Reverse Engineering in the Cognitive and Brain Andreas Schierwagen  

E-Print Network (OSTI)

On Reverse Engineering in the Cognitive and Brain Sciences Andreas Schierwagen Institute #12;On Reverse Engineering in the Cognitive and Brain Sciences Andreas Schierwagen Institute research initiatives try to utilize the operational principles of organisms and brains to develop

Schierwagen, Andreas

289

Concentration of ultrafiltered benzylpenicillin broths by reverse osmosis  

Science Journals Connector (OSTI)

...Concentration of benzylpenicillin filtered broths purified by ultrafiltration and fermented broths clarified by ultrafiltration was carried out by reverse osmosis. This study was done using a reverse osmosis l...

A. M. A. Nabais; J. P. Cardoso

2000-01-01T23:59:59.000Z

290

Development of Robust Organosilica Membranes for Reverse Osmosis  

Science Journals Connector (OSTI)

Development of Robust Organosilica Membranes for Reverse Osmosis ... polyamide was also reversible, in other words, the N-chlorinated intermediate could be regenerated to initial amide with the alk. ...

Rong Xu; Jinhui Wang; Masakoto Kanezashi; Tomohisa Yoshioka; Toshinori Tsuru

2011-10-31T23:59:59.000Z

291

Analysis of electrical signatures in synchronous generators characterized by bearing faults  

E-Print Network (OSTI)

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

Choi, Jae-Won

2009-05-15T23:59:59.000Z

292

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

SciTech Connect

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.

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

2009-03-30T23:59:59.000Z

293

Advanced fault diagnosis techniques and their role in preventing cascading blackouts  

E-Print Network (OSTI)

This dissertation studied new transmission line fault diagnosis approaches using new technologies and proposed a scheme to apply those techniques in preventing and mitigating cascading blackouts. The new fault diagnosis approaches are based on two...

Zhang, Nan

2007-04-25T23:59:59.000Z

294

Fault tree analysis of spontaneous combustion of sulphide ores and its risk assessment  

Science Journals Connector (OSTI)

A logic fault tree of mine spontaneous combustion of sulphide ores was built by the fault tree analysis (FTA) based on a lot of mechanism investigation of sulphide ore spontaneous combustion in more than ten m...

Chao Wu

1995-11-01T23:59:59.000Z

295

The Auto-tuning of ASC and Fault Online Selection Device in Intelligent Substation  

Science Journals Connector (OSTI)

In this chapter, the characteristic of single-phase earth fault in the 10kV isolated neutral distribution network is studied. The application of the auto-tuning of arc suppression coil (ASC) and fault line select...

Haibo Bu; Zhihong Zhang; Fazhang Li

2014-01-01T23:59:59.000Z

296

E-Print Network 3.0 - aircraft fault detection Sample Search...  

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

of a one step diagnostic system to detect faults. It has been... considered in the FMEA, and it can only detect faults defined in the component library but it does have......

297

Characterization of the structure of faults in the Eocene Carrizo Formation near Gause, Milam County, Texas  

E-Print Network (OSTI)

-scale graben accommodating NW-SE extension. The Carrizo Fm. consists primarily of friable to weakly lithified quartz sandstones with several horizons with interbedded siltstones and shales. Five faults and fault zones occur in the quarry with displacements...

Yilmaz, Ramazan

2012-06-07T23:59:59.000Z

298

Effects of un-transposed UHV transmission line on fault analysis of power systems  

Science Journals Connector (OSTI)

The conventional fault analysis method based on symmetrical components supposes that the three-phase parameters of un-transposed transmission line are symmetrical in case of fault. The errors caused by the method...

Anning Wang ???; Qing Chen ? ?; Zhanping Zhou ???

2008-06-01T23:59:59.000Z

299

Quenching Characteristics of a 400V-100A Class Superconducting Fault Current Limiter  

Science Journals Connector (OSTI)

The suppression of large fault currents in large electric power systems constitutes an ... previously proposed a conceptually new type of superconducting fault current limiter and its application to model distrib...

Takeshi Okuma; Tsukushi Hara; Takahiko Yamamoto

1992-01-01T23:59:59.000Z

300

A Study on a High-Tc Superconducting Fault Current Limiter  

Science Journals Connector (OSTI)

The application of a high-Tc superconductor with a high critical current density (Jc) to a fault current limiter has been investigated. When the superconductor changes ... , it has a resistance which can limit fault

Tatsuya Hayashi; Teijiro Mori; Yuuichi Wada

1992-01-01T23:59:59.000Z

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


301

New Concept of a Superconducting Fault Current Limiter and Its Evaluation of Quenching Feature  

Science Journals Connector (OSTI)

The present paper reviews the concept of a new superconducting fault current limiter with NbTi AC superconducting wire for the suppression of short-circuit currents. This fault current limiter takes full advantag...

Kiyoshi Okaniwa; Tsukushi Hara; Takahiko Yamamoto

1991-01-01T23:59:59.000Z

302

Observation and scaling of microearthquakes from the Taiwan Chelungpu-fault borehole seismometers  

Science Journals Connector (OSTI)

......Chelungpu-fault borehole seismometers...Chelungpu-fault Drilling Project Borehole Seismometers...Despite the large coseismic slip...stress drops of larger events including...Taiwan Chelungpu drilling project (TCDP...seven-level vertical borehole seismic array......

Yen-Yu Lin; Kuo-Fong Ma; Volker Oye

2012-07-01T23:59:59.000Z

303

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

Open Energy Info (EERE)

production and injection drilling, since an active fault zone often acts as a fracture-extensive low-velocity wave guide to seismic waves. We have located an active fault...

304

Basement faults and seismicity in the Appalachian Basin of New York State  

Science Journals Connector (OSTI)

Landsat lineaments identified by Earth Satellite Corporation (EARTHSAT, 1997) can be groundtruthed across the Appalachian Basin of New York State (NYS). Both fracture intensification domains (FIDs) and faults are observed in outcrop along the lineaments. Confirmation of deep structure associated with the surface structure is provided by both well log analyses and seismic reflection data (primarily proprietary). Additional faults are proposed by comparing the lineament locations with gravity and magnetic data. The result is a web of basement faults that crisscross New York State. By overlaying epicenter locations on the fault/lineament maps, it is possible to observe the spatial correlation between seismic events and the faults. Every seismic event in the Appalachian Basin portion of NYS lies on or near a known or suspected fault. It thus appears that not only are there more faults than previously suspected in NYS, but also, many of these faults are seismically active.

Robert D Jacobi

2002-01-01T23:59:59.000Z

305

The 2002 Denali Fault Earthquake, Alaska: A Large Magnitude, Slip-Partitioned Event  

Science Journals Connector (OSTI)

...the Trans Alaska Pipeline at the Denali fault crossing was engineered...dextral slip. The pipeline, designed to...slip at the fault crossing (12), withstood...13 Alyeska Pipeline Service Company (APSC), Design Basis DB-180...

Donna Eberhart-Phillips; Peter J. Haeussler; Jeffrey T. Freymueller; Arthur D. Frankel; Charles M. Rubin; Patricia Craw; Natalia A. Ratchkovski; Greg Anderson; Gary A. Carver; Anthony J. Crone; Timothy E. Dawson; Hilary Fletcher; Roger Hansen; Edwin L. Harp; Ruth A. Harris; David P. Hill; Sigrn Hreinsdttir; Randall W. Jibson; Lucile M. Jones; Robert Kayen; David K. Keefer; Christopher F. Larsen; Seth C. Moran; Stephen F. Personius; George Plafker; Brian Sherrod; Kerry Sieh; Nicholas Sitar; Wesley K. Wallace

2003-05-16T23:59:59.000Z

306

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

E-Print Network (OSTI)

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 been achieved. Intelligent...

Luo, Xu

2007-09-17T23:59:59.000Z

307

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

E-Print Network (OSTI)

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 strong Menger...

Oh, Eunseuk

2004-11-15T23:59:59.000Z

308

On the Prevalence of Sensor Faults in Real-World Deployments  

E-Print Network (OSTI)

A. Great Duck Island (GDI) data set We looked at datafor different sensors in the GDI data set. The Hybrid (I)faults Fig. 9. SHORT Faults in GDI data set rule and the HMM

Sharma, Abhishek; Golubchik, Leana; Govindan, Ramesh

2007-01-01T23:59:59.000Z

309

Remote Fault Detection of Building HVAC System Using a Global Optimization Program  

E-Print Network (OSTI)

the simulation program in conjunction with synthetic measured data to identify faults in the building operation. This fault detection approach has successfully identified all of the faulty parameters with noise levels of 1%, 3% and 6%. It successfully detected...

Lee, S. U.; Claridge, D. E.

2004-01-01T23:59:59.000Z

310

The effect of fault relayand clay smearing on groundwater flow patterns in the Lower Rhine  

E-Print Network (OSTI)

in the unconsolidated sediments of the Lower Rhine Embayment. Hydraulic head maps show that many individual faults form unconsolidated sediments at shal- low depth is likely to be di¡erent from that of faults at depths where rocks

Bense, Victor

311

Thermo-and hydro-mechanical processes along faults during rapid slip  

E-Print Network (OSTI)

Thermo- and hydro-mechanical processes along faults during rapid slip James R. Rice & Eric M micro-contacts, and (2) Thermal pressurization of fault-zone pore fluid. Both have characteristics which

Dunham, Eric M.

312

Sakhalin reversal tops C. I. S. action  

SciTech Connect

This paper reports that the outlook for joint ventures in the former U.S.S.R. has been badly muddied by Russia's reversal on one of the biggest investment opportunities: development off Sakhalin Island. Russia's Supreme Council has suspended award of a feasibility study of development of oil and gas reserves off Sakhalin to a combine of Marathon Oil Co., McDermott International, and Mitsui and Co., (MMM). Development project cost is pegged at $9 - 10 billion.

Not Available

1992-02-24T23:59:59.000Z

313

Reverse osmosis desalination with osmotic polyelectrolyte intermediate  

E-Print Network (OSTI)

degree of, '8'~STER O"' SCIENCE '!ay ISS7 Nejo? Subje". t: IiI EQICAE ENO& NEERINC REVERSE OSMOSIS DESALINATION WITH OSMOTIC POLYELECTROLYTE INTERMEDIATE A Thesis By THOMAS THEODORE McCONNELL Approved as to style and content by: airman o... , . . . . . . . . . . 91 Calculated Permeability Coefficients of Mem- branes Using Equation (42) Calculated Desalination Ratio from Equation (34) and Weight Per Cent Rejection from Equa- tion (45) for a 3. 5 Weight Per Cent Sodium Chloride Bulk Solution 92 94 Table...

McConnell, Thomas Theodore

2012-06-07T23:59:59.000Z

314

Progress on the Development of Reversible SOFC Stack Technology  

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

Presentation by Casey Brown, Versa Power Systems, at the NREL Reversible Fuel Cells Workshop, April 19, 2011

315

Tarmat behavior calculated for reservoir with sealing fault  

SciTech Connect

The Minagish Oolite oil reservoir in Kuwait is one of many Middle East reservoirs characterized by the presence of a tarmat (heavy to tar-like crude) at the oil-water contact. Since a waterflood project is planned for the Minagish Oolite, which contains a radial pattern of faults, a study was made to consider tarmat behavior upon water injection below it when the injection well is located near a sealing fault. The study resulted in a technique to predict the time of tarmat breakdown, response time at the nearest observation well, and differential pressure at the tarmat anywhere in the reservoir.

Osman, M.E.S.

1986-08-01T23:59:59.000Z

316

Transition fields during geomagnetic reversals and their geodynamic significance  

Science Journals Connector (OSTI)

...show that for certain reversals, a path midway between the two preferred paths (i...show that for certain reversals, a path midway between the two preferred paths (i...show that for certain reversals, a path midway between the two preferred paths (i...

1997-01-01T23:59:59.000Z

317

The Testing of Geomagnetic Reversal Models: Recent Developments [and Discussion  

Science Journals Connector (OSTI)

20 August 1982 research-article The Testing of Geomagnetic Reversal Models: Recent...data are most useful with regard to the testing of geomagnetic reversal models. First...English illus. United Kingdom 1985 The testing of geomagnetic reversal models; recent...

1982-01-01T23:59:59.000Z

318

Reverse Audio Engineering: Model-Based Inversion of Dynamic Range  

E-Print Network (OSTI)

1 Reverse Audio Engineering: Model-Based Inversion of Dynamic Range Compression Stanislaw Gorlow, Graduate Student Member, IEEE and Joshua D. Reiss, Member, IEEE Abstract--Reverse audio engineering so far, reverse audio engineering. I. INTRODUCTION SOUND or audio engineering is an established discipline

319

Tectonic history and setting of a seismogenic intraplate fault system that lacks microseismicity: The Saline River fault system, southern United States  

Science Journals Connector (OSTI)

Abstract Although the northwest-striking Saline River fault system of southeastern Arkansas is not defined by microseismicity, it is associated with sand blows and shows evidence of Pleistocene and Holocene surface ruptures, suggesting a significant seismogenic potential. This fault system is within the northern Gulf of Mexico interior coastal plain, a region only recently recognized as containing seismogenic faults. To better characterize this active fault system, we reconstructed its post-Paleozoic history using petroleum and coal industry wire-line well log and seismic reflection subsurface data. The Saline river fault system initiated as a series of northwest-striking grabens during Triassic/Jurassic uplift and incipient Gulf of Mexico rifting along the basement AlabamaOklahoma transform margin of the North American Proterozoic craton. During post-rift subsidence, these grabens were buried by Gulf sediments until mid-Cretaceous uplift and igneous activity resulted in minor extensional reactivation of graben faults. Faulting style changed from extension to transpression during the Late Cretaceous due to compression of eastern North America as the North Atlantic rapidly widened and due to thermal weakening of the AlabamaOklahoma transform lithospheric discontinuity as it obliquely crossed a mantle hot spot. In the Late Cretaceous, graben faults experienced contractional reactivation and steep, deeply-rooted transpressional faults developed within and parallel to the graben system. These transpressional faults locally displace Eocene, Pleistocene, and Holocene sediments. Fault activity continues on the Saline River fault system due to thin crust along the AlabamaOklahoma transform and to high heat flow, which act together to weaken the crust and promote seismogenic tectonism. The fault system may lack appreciable microseismicity because the aftershock sequence of the last large earthquake has had time to dissipate.

Randel Tom Cox; J. Luke Hall; Chris S. Gardner

2013-01-01T23:59:59.000Z

320

Control of residual aluminum from conventional treatment to improve reverse osmosis performance  

E-Print Network (OSTI)

Deposit Control for Reverse Osmosis Systems , Technicalon Colloidal Fouling in Reverse Osmosis and NanofiltrationSiO 2 ) Scaling for Reverse Osmosis , ASTM Designation D

Gabelich, C J; Ishida, K P; Gerringer, F W; Evangelista, R; Kalyan, M; Suffet, I H

2006-01-01T23:59:59.000Z

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


321

Weighted local and global regressive mapping: A new manifold learning method for machine fault classification  

Science Journals Connector (OSTI)

This article studies if machine faults can be effectively determined in a reduced dimensional space. When faults occur in machines, machine vibration signals will deviate from its normal signal pattern. Such changes can be reflected in the features constructed ... Keywords: Fault classification, Feature extraction, Unsupervised learning, Vibrations

Xiaohang Jin, Fang Yuan, Tommy W. S. Chow, Mingbo Zhao

2014-04-01T23:59:59.000Z

322

Performance of Graceful Degradation for Cache Faults Hyunjin Lee Sangyeun Cho Bruce R. Childers  

E-Print Network (OSTI)

Performance of Graceful Degradation for Cache Faults Hyunjin Lee Sangyeun Cho Bruce R. Childers to thermal hot spots) and may man- ifest themselves as operational faults at the micro- Bruce Childers that is dependent on the fault and the frequency of access to an address that would normally be held in the disabled

Cho, Sangyeun

323

Dealing with Faults in Wireless Sensor Networks Lilia Paradis and Qi Han  

E-Print Network (OSTI)

, fault detection, fault diagnosis, fault tolerance 1 Introduction Continuing advances in computational number of such sensing devices with severely limited processing, storage and communication capabilities are fragile, 2 #12;and they may fail due to depletion of batteries or destruction by an external event

324

Bearing Fault Detection in DFIG-Based Wind Turbines Using the First Intrinsic Mode Function  

E-Print Network (OSTI)

Bearing Fault Detection in DFIG-Based Wind Turbines Using the First Intrinsic Mode Function Y for bearing fault detection in DFIG-based wind turbines. The proposed method uses the first Intrinsic Mode Terms--Wind turbine, Doubly Fed Induction Generator (DFIG), fault detection, bearings, signal processing

Boyer, Edmond

325

IPR: In-Place Reconfiguration for FPGA Fault Tolerance and Rupak Majumdar2  

E-Print Network (OSTI)

IPR: In-Place Reconfiguration for FPGA Fault Tolerance Zhe Feng1 , Yu Hu1 , Lei He1 and Rupak Angeles ABSTRACT We describe In-Place Reconfiguration (IPR) for LUT-based FPGAs, an algorithm the propagation of faults seen at a pair of comple- mentary inputs. Based on IPR, we develop a fault

He, Lei

326

Fault Sensitivity Analysis and Reliability Enhancement of Analog-to-Digital Converters  

E-Print Network (OSTI)

proposing a sensitivity analysis methodology for -particle induced transients and then suggesting redesign- sients is introduced which improves the accuracy of the sensitivity analysis. The fault simulations show, Fault Sensitivity, Analog-to- Digital Converters, Alpha particles, Reliability, Transient Faults I

Koren, Israel

327

Dynamic rupture through a branched fault2 configuration at Yucca Mountain and resulting3  

E-Print Network (OSTI)

Dynamic rupture through a branched fault2 configuration at Yucca Mountain and resulting3 ground analyses. This is motivated by the normal faults in the vicinity10 of Yucca Mountain, NV, a potential site fault12 located approximately 1 km west of the crest of Yucca Mountain, is the13 most active

Dmowska, Renata

328

The Research of the Intelligent Fault Diagnosis System Optimized by GA for Marine Diesel Engine  

Science Journals Connector (OSTI)

The marine diesel engine is a complex system, which has the important function to guarantee the marine security. There is strong coupling relationship among the mapping process of fault diagnosis. An approach of intelligent fault diagnosis based on fuzzy ... Keywords: Fuzzy neural network, Genetic algorithm, Fault diagnosis, Marine diesel engine

Peng Li; Qi Jin; Haixia Gong

2008-12-01T23:59:59.000Z

329

Solid-state fault current limiter for voltage sag mitigation and its parameters design  

Science Journals Connector (OSTI)

Due to the difficulty in electric distribution network reinforcement and the interconnection of more distributed generations, fault current level has become a serious problem in system operations. The utilization of solid-state fault current limiters ... Keywords: power quality, simulation, solid-state fault current limiter, voltage sag

B. Boribun; T. Kulworawanichpong

2010-07-01T23:59:59.000Z

330

Fault current limiting and voltage sag mitigation by means of a resonant type FCL  

Science Journals Connector (OSTI)

In this paper a resonant type of fault current limiter and its application are presented. During normal operation of circuit, the thyristors is off and the resonant branches are short circuit. Therefore there is not any voltage drop on FCL. In this way, ... Keywords: bypass resistance, fault analysis, power quality, resonant type fault current limiter

M. S. Mohebbi Nazar; M. Abapour

2006-08-01T23:59:59.000Z

331

Interseismic deformation and geologic evolution of the Death Valley Fault Zone  

E-Print Network (OSTI)

Interseismic deformation and geologic evolution of the Death Valley Fault Zone Cecilia Del Pardo,1 Valley Fault Zone (DVFZ), located in southeastern California, is an active fault system with an evolved motion and long-term stress accumulation rates to better understand the nature of both past and present

Blewitt, Geoffrey

332

Core-log integration studies in hole-A of Taiwan Chelungpu-fault Drilling Project  

Science Journals Connector (OSTI)

......Chelungpu-fault Drilling Project Yun-Hao...Chelungpu-fault Drilling Project (TCDP...involved in the large displacements...electrical borehole images and dipole-shear...energetics of a large earthquake from...Chelungpu-fault Drilling Project, Nature...Stress-induced borehole elongation......

Yun-Hao Wu; En-Chao Yeh; Jia-Jyun Dong; Li-Wei Kuo; Jui-Yu Hsu; Jih-Hao Hung

2008-09-01T23:59:59.000Z

333

Heat signature on the Chelungpu fault associated with the 1999 Chi-Chi, Taiwan earthquake  

E-Print Network (OSTI)

for a large earthquake. Temperature measurements in a borehole that intersects the Chelungpu fault at a depth-fault temperature change observed for any previous large earthquakes that can be attributed to the frictional, 1999 Chi-Chi earth- quake, the Taiwan Chelungpu-fault Drilling Project (TCDP) bored two holes which

Ma, Kuo-Fong

334

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

E-Print Network (OSTI)

1 A CONTROLLER FOR HVAC SYSTEMS WITH FAULT DETECTION CAPABILITIES BASED ON SIMULATION MODELS T. I describes a control scheme with fault detection capabilities suitable for application to HVAC systems as a reference of correct operation. Faults that occur in the HVAC system under control cause the PI

335

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

E-Print Network (OSTI)

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

Ayers, Joseph

336

Current Issues in Vibration-Based Fault Diagnostics and Prognostics Victor Giurgiutiu  

E-Print Network (OSTI)

1 Current Issues in Vibration-Based Fault Diagnostics and Prognostics Victor Giurgiutiu Mechanical Current issues in vibration-based fault diagnostics and prognostics are: (a) fault/damage identification and then classification. Keywords: structural health monitoring, active sensors, vibrations, signal analysis; smart

Giurgiutiu, Victor

337

Fault Diagnosis Of A Water For Injection System Using Enhanced Structural Isolation  

Science Journals Connector (OSTI)

A water for injection system supplies chilled sterile water as a solvent for pharmaceutical products. There are ultimate requirements for the quality of the sterile water, and the consequence of a fault in temperature or in flow control within the process ... Keywords: Fault Diagnosis, Fault Isolation, Matching, Structural Analysis

Morten Laursen; Mogens Blanke; Dilek D?TegR

2008-12-01T23:59:59.000Z

338

Time Reversal in Solids (Linear and Nonlinear Elasticity): Multimedia Resources in Time Reversal  

DOE Data Explorer (OSTI)

Dynamic nonlinear elastic behavior, nonequilibrium dynamics, first observed as a curiosity in earth materials has now been observed in a great variety of solids. The primary manifestations of the behavior are characteristic wave distortion, and slow dynamics, a recovery process to equilibrium that takes place linearly with the logarithm of time, over hours to days after a wave disturbance. The link between the diverse materials that exhibit nonequilibrium dynamics appears to be the presence of soft regions, thought to be 'damage' at many scales, ranging from order 10-9 m to 10-1 m at least. The regions of soft matter may be distributed as in a rock sample, or isolated, as in a sample with a single crack [LANLhttp://www.lanl.gov/orgs/ees/ees11/geophysics/nonlinear/nonlinear.shtml]. The Geophysics Group (EES-11) at Los Alamos National Laboratory has posted two or more multimedia items under each of the titles below to demonstrate aspects of their work: 1) Source Reconstruction Using Time Reversal; 2) Robustness and Efficiency of Time Reversal Acoustics in Solid Media; 3) Audio Example of Time Reversal - Speech Privacy; 4) Crack Imagining with Time Reversal - Experimental Results; 5) Time Reversal of the 2004 (M9.0) Sumatra Earthquake.

339

Fault prediction in aircraft engines using Self-Organizing Maps  

E-Print Network (OSTI)

Fault prediction in aircraft engines using Self- Organizing Maps Marie Cottrell1 , Patrice Gaubert1. Aircraft engines are designed to be used during several tens of years. Their maintenance is a challenging and costly task, for obvious security reasons. The goal is to ensure a proper operation of the engines

Paris-Sud XI, Université de

340

Modeling Fault Propagation in Telecommunications Networks for Diagnosis Purposes  

E-Print Network (OSTI)

Modeling Fault Propagation in Telecommunications Networks for Diagnosis Purposes A. Aghasaryan , C@lipn.univ-paris13.fr Abstract: This paper describes a formalism to model the behavior of telecommunications net. Keywords: network management, modeling, UML, distributed diagnosis. 1 Introduction Telecommunications

Pencolé, Yannick

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


341

Fault Tolerance in Data Gathering Wireless Sensor Networks  

Science Journals Connector (OSTI)

......total 30% node faults. FIGURE 8. Energy efficiency. better than LEACH when link error...Efficiency In this section, we analyze the energy efficiency (in Fig. 8) and time efficiency...May 1213, pp. 474479. The Printing House, Inc. [14] Huang, S. K., Ssu......

Guangyan Huang; Yanchun Zhang; Jing He; Jinli Cao

2011-06-01T23:59:59.000Z

342

Influence of plastic deformation on bimaterial fault rupture directivity  

E-Print Network (OSTI)

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

Dmowska, Renata

343

Fault Detection Effectiveness of Spathic Test Data Jane Huffman Hayes  

E-Print Network (OSTI)

Fault Detection Effectiveness of Spathic Test Data Jane Huffman Hayes Computer Science Department This paper presents an approach for generating test data for unit-level, and possibly integration-level, testing based on sampling over intervals of the input probability distribution, i.e., one that has been

Hayes, Jane E.

344

Invited Talk: Mitigating the Effects of Internet Timing Faults  

E-Print Network (OSTI)

Invited Talk: Mitigating the Effects of Internet Timing Faults Across Embedded Network Gateways and the Internet. The usual approach to making such a connection is to install a gateway node which translates from Internet protocols to embedded field bus network protocols. Such connections raise obvious security

Koopman, Philip

345

Autonomous FPGA Fault Handling through Competitive Runtime Reconfiguration  

E-Print Network (OSTI)

environments of mechanical/acoustical stress during launch, high doses of ionizing radiation, and thermal due to radiation- induced stuck-at-faults, thermal fatigue, oxide breakdown, electromigration-available [Xilinx04]. Meanwhile NASA terrestrial applications routinely employ FPGAs for tasks ranging from launch

DeMara, Ronald F.

346

Dynamic core length in saturated core fault current limiters  

Science Journals Connector (OSTI)

A saturated core fault current limiter (SCFCL) is a non-linear core-reactor where the core is saturated by an external superconducting DC bias source to achieve a low core permeability at nominal AC currents. Fault current levels in the AC coils de-saturate the core and transform it to a higher permeability state, hence limiting the fault current. In this work we describe the transition between saturated and de-saturated states in three SCFCL configurations. The 'effective core length', Leff, of the SCFCL, defined as the length of the de-saturated AC core limb, is introduced for exploring this transition as a function of the current, I, in the AC coil. Practically, Leff allows one to see the SCFCL as an inductor with a variable core length, allowing calculations of the impedance of the SCFCL over the whole range of operating currents. The Leff(I) curve is further used to calculate the dynamics of the demagnetization factor in a SCFCL. We show that the strong change in the magnetic induction of a SCFCL at high current is the result of both increasing the effective core length and decreasing the demagnetization factor. The method and results presented here serve as an important tool for comparing between various SCFCL concepts not only by comparing their impedance values at the extreme fault and nominal current conditions but also by providing an insight into the full de-saturation process.

Y Nikulshin; Y Wolfus; A Friedman; Y Yeshurun

2013-01-01T23:59:59.000Z

347

Acoustic condition monitoring of wind turbines: Tip faults  

Science Journals Connector (OSTI)

As a significant and growing source of the worlds energy wind turbine reliability is becoming a major concern. At least two fault detection techniques for condition monitoring of wind turbine blades have been reported in early literature i.e. acoustic emissions and optical strain sensors. These require off-site measurement. The work presented here offers an alternative non-contact fault detection method based on the noise emission from the turbine during operation. An investigation has been carried out on a micro wind turbine under laboratory conditions. 4 severity levels for a fault have been planted in the form of added weight at the tip of one blade to simulate inhomogeneous debris or ice build up. Acoustic data is obtained at a single microphone placed in front of the rotor. Two prediction methods have been developed and tested on real data: one based on a single feature - rotational frequency spectral magnitude; and another based on a fuzzy logic interference using two inputs - spectral peak and rotational peak variation with time. Results show that the single spectral peak feature can be used to determine fault severity in ranges. The implementation of the fuzzy logic using a further input feature is shown to significantly improve the detection accuracy.

Daniel J. Comboni; Bruno Fazenda

2012-01-01T23:59:59.000Z

348

Consequences of Fault Currents Contributed by Distributed Generation  

E-Print Network (OSTI)

Consequences of Fault Currents Contributed by Distributed Generation Supplemental Project Report Currents Contributed by Distributed Generation Natthaphob Nimpitiwan Gerald Heydt Research Project Team distributed generation (DG) is growing in the over- all generation mix due in part to state and national

349

On Fault Coverage of Tests for Finite State Specifications  

E-Print Network (OSTI)

On Fault Coverage of Tests for Finite State Specifications A. Petrenko and G. v. Bochmann-Ville, Montréal (Québec), H3C 3J7, Canada Abstract Testing is a trade-off between increased confidence in the correctness of the implementation under test and constraints on the amount of time and effort that can

von Bochmann, Gregor

350

Diverse neural net solutions to a fault diagnosis problem \\Lambda  

E-Print Network (OSTI)

system solution to a problem of fault diagnosis in a four­stroke marine diesel engine; that of early detection of faulty combustion in an engine cylinder. Recognition of faulty combustion usually requires the intervention of a skilled marine engineer, to undertake the time­ consuming and fallible process of comparing

Sharkey, Amanda

351

Fault-tolerant architecture for quantum computation using electrically controlled  

E-Print Network (OSTI)

ARTICLES Fault-tolerant architecture for quantum computation using electrically controlled an architecture for quantum computation using electrically controlled semiconductor spins by extending the Loss in the solid state. Here, we develop a scalable architecture for solid-state quantum computation based

Loss, Daniel

352

Fracture surface energy of the Punchbowl fault, San Andreas system  

E-Print Network (OSTI)

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

Chester, Frederick M.

353

Algorithm-dependent fault tolerance for distributed computing  

SciTech Connect

Large-scale distributed systems assembled from commodity parts, like CPlant, have become common tools in the distributed computing world. Because of their size and diversity of parts, these systems are prone to failures. Applications that are being run on these systems have not been equipped to efficiently deal with failures, nor is there vendor support for fault tolerance. Thus, when a failure occurs, the application crashes. While most programmers make use of checkpoints to allow for restarting of their applications, this is cumbersome and incurs substantial overhead. In many cases, there are more efficient and more elegant ways in which to address failures. The goal of this project is to develop a software architecture for the detection of and recovery from faults in a cluster computing environment. The detection phase relies on the latest techniques developed in the fault tolerance community. Recovery is being addressed in an application-dependent manner, thus allowing the programmer to take advantage of algorithmic characteristics to reduce the overhead of fault tolerance. This architecture will allow large-scale applications to be more robust in high-performance computing environments that are comprised of clusters of commodity computers such as CPlant and SMP clusters.

P. D. Hough; M. e. Goldsby; E. J. Walsh

2000-02-01T23:59:59.000Z

354

Module Placement for Fault-Tolerant Microfluidics-Based Biochips  

E-Print Network (OSTI)

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

Chakrabarty, Krishnendu

355

Fault Tolerance on Interleaved inverter with Magnetic couplers  

E-Print Network (OSTI)

Fault Tolerance on Interleaved inverter with Magnetic couplers K.Guépratte, D.Frey, P-O.Jeannin, H Electrical Engineering (G2Elab), Thales Systemes Aeroportes Abstract- The paper focuses on a new control strategy for improving the availability of power electronic converters based on interleaved structures

Paris-Sud XI, Université de

356

Defects and Faults in Quantum Cellular Automata at Nano Scale  

E-Print Network (OSTI)

Defects and Faults in Quantum Cellular Automata at Nano Scale Mehdi Baradaran Tahoori, Mariam considerable research on quantum dot cellular automata (QCA) as a new computing scheme in the nano, quantum dot cellular automata (QCA) not only gives a solution at nano scale, but also it offers a new

357

Proceedings of the 18th Fault-Tolerant Computing Symposium  

E-Print Network (OSTI)

Proceedings of the 18th Fault-Tolerant Computing Symposium Tokyo, Japan, pp. 234-239, June 1988 performed on this erroneous information are ``undone'' using a hardware mechanism for fast rollback of a few and confine the damage caused by the error to the failed module, it is often necessary to check the outputs

Tamir, Yuval

358

This document contains 3087 words. FAULT-TOLERANT COMPUTING  

E-Print Network (OSTI)

or physical damage. An extensive methodology has been developed in this field over the past thirty years the annual IEEE International Symposium on Fault-Tolerant Computing (FTCS) and the papers in its Digests with protective redundancy so that, if the module fails, others can assume its function. Special mechanisms

Rennels, David A.

359

Three fault ride through controllers for wind systems running in isolated micro-grid and Effects of fault type on their performance: A review and comparative study  

Science Journals Connector (OSTI)

Abstract This paper presents survey about Fault Ride Through (FRT) techniques and controllers which employed with all wind generation system types. After presenting a comprehensive FRT survey, paper proposes three Fault Ride Through (FRT) controllers for keeping stability of Fixed Speed Wind Generation (FSWG) system serving in isolated Micro-Grid (MG). The first controller has been implemented by inserting Superconductor Fault Current Limiter (SFCL) in series with wind generator terminals during fault instant. The second proposed FRT controller is modifying the conventional Pitch Angle Controllers (PAC) to can spill and reduce high percentage of extracted mechanical wind power during and subsequent fault occurrence which in turns help stability improvement and restoration. Third FRT technique is performed by adapting the wind turbine gearbox ratio which forces the wind generation system to run far from the maximum power point. The best performance is obtained with the SFCL controller. Superior results are obtained when the three proposed FRT controllers are employed simultaneously. The three developed FRT controllers are simple, reliable and economical attractive. Effects of fault type on SFCL FRT controller performance are analyzed and investigated in details. The proposed SFCL FRT controller has been tested under single phase, double phase, phase to phase, and three phases to ground faults. Results display that the three phases to ground fault is the most severe type on SFCL FRT performance from stability point of view. On the other hand, double phase to ground fault is the most severe one from fluctuations and oscillations points of view. Parameters of the SFCL must be adjusted based on the three phases to ground fault. If the SFCL FRT controller is designed to can deal with three phases fault, it sure can deal with the other fault types successfully.

Rashad M. Kamel

2014-01-01T23:59:59.000Z

360

Proactive Fault Tolerance for HPC with Xen Virtualization  

SciTech Connect

with thousands of processors. At such large counts of compute nodes, faults are becoming common place. Current techniques to tolerate faults focus on reactive schemes to recover from faults and generally rely on a checkpoint/restart mechanism. Yet, in today's systems, node failures can often be anticipated by detecting a deteriorating health status. Instead of a reactive scheme for fault tolerance (FT), we are promoting a proactive one where processes automatically migrate from ?unhealthy? nodes to healthy ones. Our approach relies on operating system virtualization techniques exemplied by but not limited to Xen. This paper contributes an automatic and transparent mechanism for proactive FT for arbitrary MPI applications. It leverages virtualization techniques combined with health monitoring and load-based migration. We exploit Xen's live migration mechanism for a guest operating system (OS) to migrate an MPI task from a health-deteriorating node to a healthy one without stopping the MPI task during most of the migration. Our proactive FT daemon orchestrates the tasks of health monitoring, load determination and initiation of guest OS migration. Experimental results demonstrate that live migration hides migration costs and limits the overhead to only a few seconds making it an attractive approach to realize FT in HPC systems. Overall, our enhancements make proactive FT a valuable asset for long-running MPI application that is complementary to reactive FT using full checkpoint/ restart schemes since checkpoint frequencies can be reduced as fewer unanticipated failures are encountered. In the context of OS virtualization, we believe that this is the rst comprehensive study of proactive fault tolerance where live migration is actually triggered by health monitoring.

Nagarajan, Arun Babu [North Carolina State University; Mueller, Frank [North Carolina State University; Engelmann, Christian [ORNL; Scott, Stephen L [ORNL

2007-01-01T23:59:59.000Z

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


361

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

E-Print Network (OSTI)

across a fault (Randolph 1991), due to permeability reduction in the deformation zone, but in some cases can be enhanced along the fault slip plane (Antonellini and Aydin 1994), i. e. parallel to the fault. A knowledge of subsurface fault distributions... the electromagnetic response. Seaborne et al. (1979) interpreted the anomalies as the edge effect of thin horizontal sheets of low resistivity beds, as opposed to the high conductivity response of the material in a fault zone. In a similar study, Hazell er al...

Gorman, Erin Margaret

2012-06-07T23:59:59.000Z

362

A reverse counterfactual analysis of causation  

E-Print Network (OSTI)

to justly acknowledge. Particular thanks go to: Knut Nygaard, for pizza and weights in Boston; Julian Hendrix for cat-sitting, house-sitting and wife-sitting while I was at Harvard; Richard Lloyd Morgan, for listening; Jackie Solomon and Maria Whelan... , Schaffer 2007. 4Collins, Hall and Paul say that a divide-and-conquer methodology is acceptable, given how tough the analysis of causation is (Collins et al. 2004, 3839). 1.5. THINKING ABOUT THE REVERSE COUNTERFACTUAL 13 the difference between e occurring...

Broadbent, Alex

2007-11-20T23:59:59.000Z

363

Steady State Thermoelectric Field-Reversed Configurations  

Science Journals Connector (OSTI)

It is shown that the cross-field thermoelectric force of magnetized plasmas can maintain field-reversed configurations against resistive diffusion, resulting in a steady state device attractive for thermonuclear fusion. If a peaked radial temperature profile is maintained, the thermoelectric force is in the opposite direction to the usual resistive friction, thus maintaining the field configuration. The field maintenance is tantamount to dynamo action, operating even in two dimensions. We show that a steady state device can be made by simply heating the O-point: no external electric fields or particle sources are needed. The feasibility of this scheme for fusion is discussed.

A. B. Hassam; R. M. Kulsrud; R. J. Goldston; H. Ji; M. Yamada

1999-10-11T23:59:59.000Z

364

Kinetic Stability of the Field Reversed Configuration  

SciTech Connect

New computational results are presented which advance the understanding of the stability properties of the Field-Reversed Configuration (FRC). The FRC is an innovative confinement approach that offers a unique fusion reactor potential because of its compact and simple geometry, translation properties, and high plasma beta. One of the most important issues is FRC stability with respect to low-n (toroidal mode number) MHD modes. There is a clear discrepancy between the predictions of standard MHD theory that many modes should be unstable on the MHD time scale, and the observed macroscopic resilience of FRCs in experiments.

E.V. Belova; R.C. Davidson; H. Ji; and M. Yamada

2002-07-09T23:59:59.000Z

365

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

SciTech Connect

Proactive online monitoring in the nuclear industry is being explored using the Electric Power Research Institutes 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.

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

2014-06-01T23:59:59.000Z

366

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

Open Energy Info (EERE)

Locating an active fault zone in Coso geothermal field by analyzing seismic Locating an active fault zone in Coso geothermal field by analyzing seismic guided waves from microearthquake data Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Locating an active fault zone in Coso geothermal field by analyzing seismic guided waves from microearthquake data Details Activities (1) Areas (1) Regions (0) Abstract: Active fault systems usually provide high-permeability channels for hydrothermal outflow in geothermal fields. Locating such fault systems is of a vital importance to plan geothermal production and injection drilling, since an active fault zone often acts as a fracture-extensive low-velocity wave guide to seismic waves. We have located an active fault zone in the Coso geothermal field, California, by identifying and analyzing

367

Active Fault Controls At High-Temperature Geothermal Sites- Prospecting For  

Open Energy Info (EERE)

Page Page Edit History Facebook icon Twitter icon » Active Fault Controls At High-Temperature Geothermal Sites- Prospecting For New Faults Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Active Fault Controls At High-Temperature Geothermal Sites- Prospecting For New Faults Details Activities (1) Areas (1) Regions (0) Abstract: Our previous studies found spatial associations between seismically active faults and high-temperature geothermal resources in the western Basin and Range, suggesting that recency of fault movement may be a useful criterion for resource exploration. We have developed a simple conceptual model in which recently active (Holocene) faults are preferred conduits for migration of thermal water from deep crustal depths, and we

368

Abstract--The reliability and quality of power distribution systems are usually affected by many different distribution faults.  

E-Print Network (OSTI)

1 Abstract--The reliability and quality of power distribution systems are usually affected by many different distribution faults. Tree-caused faults are one of the major fault causes. In this paper, four to analyze the characteristics of tree-caused distribution faults. This paper also uses statistical

Chow, Mo-Yuen

369

Global Stability of the Field Reversed Configuration  

SciTech Connect

New computational results are presented which provide a theoretical basis for the stability of the Field Reversed Configuration (FRC). The FRC is a compact toroid with negligible toroidal field in which the plasma is confined by a poloidal magnetic field associated with toroidal diamagnetic current. Although many MHD modes are predicted to be unstable, FRCs have been produced successfully by several formation techniques and show surprising macroscopic resilience. In order to understand this discrepancy, we have developed a new 3D nonlinear hybrid code (kinetic ions and fluid electrons), M3D-B, which is used to study the role of kinetic effects on the n = 1 tilt and higher n modes in the FRC. Our simulations show that there is a reduction in the tilt mode growth rate in the kinetic regime, but no absolute stabilization has been found for s bar less than or approximately equal to 1, where s bar is the approximate number of ion gyroradii between the field null and the separatrix. However, at low values of s bar, the instabilities saturate nonlinearly through a combination of a lengthening of the initial equilibrium and a modification of the ion distribution function. These saturated states persist for many Alfven times, maintaining field reversal.

E.V. Belova; S.C. Jardin; H. Ji; R.M. Kulsrud; W. Park; M. Yamada

2000-11-15T23:59:59.000Z

370

Modeling tip zones to predict the throw and length characteristics of faults  

SciTech Connect

A map of faults in a 60 km{sup 2} area of the southern North Sea has been produced from three-dimensional seismic data. The faults shown on the map obey power-law cumulative-frequency distributions for throw (power-law exponent, D, {approx} 2.7) and length (D {approx} 1.1). Simulations have been carried out to correct for sampling biases in the data and to make predictions of the throw the data and to make predictions of the throw and length scaling characteristics of the faults. The most important bias is caused by poor resolution of the small displacement tip zones of faults. The raw data show considerable scatter in their length: throw ratios, but they more closely fit a linar relationship if a length of 500 m is added to each fault, thereby making up for the zones near the fault tips with throws ({approx} 15 m) below seismic resolution. Further variability in the data may be caused by such geological factors as fault interaction. Tip lengths have been extended to simulate the actual fault pattern in the study area. Maps produced by this procedure can be used to estimate the true connectivity of the fault network. Extending the faults results in greater connectivity than shown by the raw data, which may cause greater compartmentalization of the rock mass. This greater compartmentalization has implications for hydrocarbon exploitation if the faults are sealing. A problem with the model, however, is that it does not deal effectively with the interaction of subparallel, noncoplanar faults. To test the reliability of the procedure, we analyzed exposure-scale faults in Somerset, United Kingdom, where the tips are well constrained. Both length-throw relationships and map-pattern connectivity for the simulated fault networks agree closely with the actual data.

Pickering, G.; Sanderson, D.J.; Bull, J.M. [Univ. of Southampton (United Kingdom)] [and others

1997-01-01T23:59:59.000Z

371

Quaternary faults of the central Rocky Mountains, Colorado: A new seismotectonic evaluation  

SciTech Connect

Quaternary faults in the central Rocky Mountain of CO exhibit normal displacement, are generally parallel to the strike of pre-existing Larmide structures, and typically occur in the hanging walls of Laramide thrust faults. These observations are consistent with models in which Mesozoic thrust faults are being reactivated as normal faults in the contemporary extensional tectonic setting. To assess the seismogenic potential of these faults, the authors evaluated the recency of fault movement and style of deformation via aerial reconnaissance, interpretation of aerial photography and field mapping of selected sites. The 82-km-long Red Rocks-Climarron fault zone shows evidence of late Quaternary displacement and may be capable of producing an M[>=]6.75 earthquake based on its total fault length and inferred fault width. Earthquake hypocenters indicate that the thickness of the seismogence crust in CO is similar to much of the western US (ca. 15 km). In additional to tectonic deformation, numerous faults and lineaments have been identified in the Paradox Basin and along the southern Grand Hogback monocline that are active due to diapiric movement of halite. In particular, active deformation along the Grand Hogback is limited to portions of the structure underlain by a 3-km-deep Pennsylvania halite basin. Because Quaternary deformation along and near these large Laramide structures is due to the movement of halite rather than deep-seated tectonism, the maximum size of a potential earthquake is limited by the down-dip width and lateral extent of fault planes within brittle rocks overlying the halite. The authors infer that the maximum depth of brittle faulting due to diapiric halite flow is 6 km, and the earthquakes larger than M 5 are unlikely to occur on faults associated with the Grand Hogback and salt anticlines of the Paradox Basin. The 1984 Carbondale earthquake swarm (M[<=]3.2) may have been the result of such faulting.

Unruh, J.R.; Noller, J.S.; Lettis, W.R. (William Lettis and Association, Inc., Oakland, CA (United States)); Wong, I.G.; Sawyer, T.L.; Bott, J.D.J. (Woodward-Clyde Federal Services, Oakland, CA (United States))

1993-04-01T23:59:59.000Z

372

Behavior of Repeating Earthquake Sequences in Central California and the Implications for Subsurface Fault Creep  

SciTech Connect

Repeating earthquakes (REs) are sequences of events that have nearly identical waveforms and are interpreted to represent fault asperities driven to failure by loading from aseismic creep on the surrounding fault surface at depth. We investigate the occurrence of these REs along faults in central California to determine which faults exhibit creep and the spatio-temporal distribution of this creep. At the juncture of the San Andreas and southern Calaveras-Paicines faults, both faults as well as a smaller secondary fault, the Quien Sabe fault, are observed to produce REs over the observation period of March 1984-May 2005. REs in this area reflect a heterogeneous creep distribution along the fault plane with significant variations in time. Cumulative slip over the observation period at individual sequence locations is determined to range from 5.5-58.2 cm on the San Andreas fault, 4.8-14.1 cm on the southern Calaveras-Paicines fault, and 4.9-24.8 cm on the Quien Sabe fault. Creep at depth appears to mimic the behaviors seen of creep on the surface in that evidence of steady slip, triggered slip, and episodic slip phenomena are also observed in the RE sequences. For comparison, we investigate the occurrence of REs west of the San Andreas fault within the southern Coast Range. Events within these RE sequences only occurred minutes to weeks apart from each other and then did not repeat again over the observation period, suggesting that REs in this area are not produced by steady aseismic creep of the surrounding fault surface.

Templeton, D C; Nadeau, R; Burgmann, R

2007-07-09T23:59:59.000Z

373

Novel 4-Way Refrigerant Reversing Valve for Heat Pumps  

SciTech Connect

This project is nearing completion. Since the last progress report (November, 1999), all experimental tests have been completed. Preliminary analysis shows the refrigerant pressure drops through the reversing valve were reduced by an average of about 60{percent}, when compared to traditional reversing valves. Also, the prototype reversing valve reduced the overall coefficient of performance (COP) by an average of only 0.45{percent}.

Darin W. Nutter

2000-02-17T23:59:59.000Z

374

Systems analysis approach to probabilistic modeling of fault trees  

SciTech Connect

A method of probabilistic modeling of fault tree logic combined with stochastic process theory (Markov modeling) has been developed. Systems are then quantitatively analyzed probabilistically in terms of their failure mechanisms including common cause/common mode effects and time dependent failure and/or repair rate effects that include synergistic and propagational mechanisms. The modeling procedure results in a state vector set of first order, linear, inhomogeneous, differential equations describing the time dependent probabilities of failure described by the fault tree. The solutions of this Failure Mode State Variable (FMSV) model are cumulative probability distribution functions of the system. A method of appropriate synthesis of subsystems to form larger systems is developed and applied to practical nuclear power safety systems.

Bartholomew, R.J.; Qualls, C.R.

1985-01-01T23:59:59.000Z

375

Testing of 3-meter Prototype Fault Current Limiting Cables  

SciTech Connect

Two 3-m long, single-phase cables have been fabricated by Ultera from second generation (2G) superconductor supplied by American Superconductor. The first cable was made with two layers of 2G tape conductor and had a critical current of 5,750 A while the second cable had four layers and a critical current of 8,500 A. AC loss was measured for both cables at ac currents of up to 4 kArms. Ultera performed initial fault current studies of both cables in Denmark with limited currents in the range from 9.1 to 44 kA. Results from these tests will provide a basis for a 25-m long, three-phase, prototype cable to be tested at ORNL early next year and a 300-m long, fault current limiting, superconducting cable to be installed in a ConEd substation in New York City.

Gouge, Michael J [ORNL] [ORNL; Duckworth, Robert C [ORNL] [ORNL; Demko, Jonathan A [ORNL] [ORNL; Rey, Christopher M [ORNL] [ORNL; Thompson, James R [ORNL] [ORNL; Lindsay, David T [ORNL] [ORNL; Tolbert, Jerry Carlton [ORNL] [ORNL; Willen, Dag [Ultera] [Ultera; Lentge, Heidi [Ultera] [Ultera; Thidemann, Carsten [Ultera] [Ultera; Carter, Bill [AMSC] [AMSC

2009-01-01T23:59:59.000Z

376

9 - Superconducting fault current limiters and power cables  

Science Journals Connector (OSTI)

Abstract: This chapter addresses the technology of superconducting power cables and superconducting fault current limiters (FCL). The first part of the chapter is a general summary of the electric power grid. This sets the stage for a discussion of the historical development of superconducting AC and DC cables, which begins with low temperature superconductor (LTS)-based systems. It then describes the present status of superconducting cable technology and summarizes some of the major programs around the world. Whereas power cables may be thought of as a replacement for conventional power system components, \\{FCLs\\} and fault current controllers (FCC) have no conventional equivalent in the power grid. Several conceptually different FCL designs are described. The status of their development and installation on the power grid are described.

W. Hassenzahl

2013-01-01T23:59:59.000Z

377

Dynamic simulation of a reverse Brayton refrigerator  

SciTech Connect

A test refrigerator based on the modified Reverse Brayton cycle has been developed in the Chinese Academy of Sciences recently. To study the behaviors of this test refrigerator, a dynamic simulation has been carried out. The numerical model comprises the typical components of the test refrigerator: compressor, valves, heat exchangers, expander and heater. This simulator is based on the oriented-object approach and each component is represented by a set of differential and algebraic equations. The control system of the test refrigerator is also simulated, which can be used to optimize the control strategies. This paper describes all the models and shows the simulation results. Comparisons between simulation results and experimental data are also presented. Experimental validation on the test refrigerator gives satisfactory results.

Peng, N.; Xiong, L. Y.; Dong, B.; Liu, L. Q. [State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, CAS, Beijing, 100190 (China); Lei, L. L.; Tang, J. C. [State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, CAS, Beijing, 100190 China and Graduate University of Chinese Academy of Sciences, Beijing, 100190 (China)

2014-01-29T23:59:59.000Z

378

Direct observation of time reversal violation  

SciTech Connect

A direct evidence for Time Reversal Violation (TRV) means an experiment that, considered by itself, clearly shows TRV independent of, and unconnected to, the results for CP Violation. No existing result before the recent BABAR experiment with entangled neutral B mesons had demonstrated TRV in this sense. There is a unique opportunity for a search of TRV with unstable particles thanks to the Einstein-Podolsky-Rosen (EPR) Entanglement between the two neutral mesons in B, and PHI, Factories. The two quantum effects of the first decay as a filtering measurement and the transfer of information to the still living partner allow performing a genuine TRV asymmetry with the exchange of 'in' and 'out' states. With four independent TRV asymmetries, BABAR observes a large deviation of T-invariance with a statistical significance of 14 standard deviations, far more than needed to declare the result as a discovery. This is the first direct observation of TRV in the time evolution of any system.

Bernabeu, J. [Department of Theoretical Physics, University of Valencia, and IFIC, Joint Centre Univ. Valencia-CSIC (Spain)

2013-06-12T23:59:59.000Z

379

Detailed study of DFIG-based wind turbines to overcome the most severe grid faults  

Science Journals Connector (OSTI)

Abstract This paper studies the effects of voltage sags caused by faults on doubly-fed induction generators to overcome grid faults. A wide range of sag duration and depth values is considered. It is observed that sag duration influence is periodical. Sag effects depend on duration and depth and on the fault-clearing process as well. Two approaches of the model are compared: the most accurate approach, discrete sag, considers that the fault is cleared in the successive natural fault-current zeros of affected phases, leading to a voltage recovery in several steps; the least accurate approach, abrupt sag, considers that the fault is cleared instantaneously in all affected phases, leading to a one-step voltage recovery. Comparison between both sag models reveals that the fault-clearing process smoothes sag effects. The study assumes that the rotor-side converter can keep constant the transformed rotor current in the synchronous reference frame, thus providing insights into wind turbine fault ride-through capability. The voltage limit of the rotor-side converter is considered to show the situations where the rotor current can be controlled. Finally, a table and a 3D figure summarizing the effects of the most severe grid faults on the rotor-side converter to overcome the most severe faults are provided.

Alejandro Roln; Joaqun Pedra; Felipe Crcoles

2014-01-01T23:59:59.000Z

380

Control of magnetization reversal in oriented strontium ferrite thin films  

SciTech Connect

Oriented Strontium Ferrite films with the c axis orientation were deposited with varying oxygen partial pressure on Al{sub 2}O{sub 3}(0001) substrate using Pulsed Laser Deposition technique. The angle dependent magnetic hysteresis, remanent coercivity, and temperature dependent coercivity had been employed to understand the magnetization reversal of these films. It was found that the Strontium Ferrite thin film grown at lower (higher) oxygen partial pressure shows Stoner-Wohlfarth type (Kondorsky like) reversal. The relative importance of pinning and nucleation processes during magnetization reversal is used to explain the type of the magnetization reversal with different oxygen partial pressure during growth.

Roy, Debangsu, E-mail: debangsu@physics.iisc.ernet.in; Anil Kumar, P. S. [Department of Physics, Indian Institute of Science, Bangalore 560012 (India)

2014-02-21T23:59:59.000Z

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


381

Magnetic Vortex Core Reversal by Low-Field Excitations  

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

Magnetic Vortex Core Reversal by Low-Field Excitations Print In micrometer-sized magnetic thin films, the magnetization typically adopts an in-plane, circular configuration known...

382

Ethanol separation from molasses based fermentation broth by reverse osmosis  

Science Journals Connector (OSTI)

Irradiated styrene-grafted cellulose acetate membrane was used for the separation of ethanol by reverse osmosis. Ethanol separation from molasses based fermentation broth...

J. P. Choudhury; P. Ghosh; B. K. Guha

1986-10-01T23:59:59.000Z

383

Molecular dynamics simulations of osmosis and reverse osmosis in solutions  

Science Journals Connector (OSTI)

Computer simulation studies using the method of molecular dynamics have been carried out to investigate osmosis and reverse osmosis in solutions separated by semi-permeable membranes....

S. Murad

1996-01-01T23:59:59.000Z

384

Structures of cellulose acetate membranes for reverse osmosis  

Science Journals Connector (OSTI)

Studies under the scanning electron microscope have shown that the cellulose acetate membranes used for reverse osmosis are high-molecular-weight condensation structures of...

I. N. Vlodavets; G. Z. Nefedova

1977-01-01T23:59:59.000Z

385

Reversible mechanism for spin crossover in transition-metal cyanides  

E-Print Network (OSTI)

We report the mechanisms for reversible and repeatable spin transition in a Prussian blue analog crystal, KCo[Fe(CN)[subscript 6

Kabir, Mohammad Mukul

386

Photochromic Metal-Organic Frameworks: Reversible Control of...  

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

Photochromic Metal-Organic Frameworks: Reversible Control of Singlet Oxygen Generation Previous Next List Jihye Park, Dawei Feng, Shuai Yuan and Hong-Cai Zhou, Angew. Chem. Int....

387

Development of Reversible Fuel Cell Systems at Proton Energy...  

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

at Proton Energy Presentation by Everett Anderson, PROTON ON SITE, at the NREL Reversible Fuel Cells Workshop, April 19, 2011 revfcwkshpanderson.pdf More Documents &...

388

Reverse audio engineering for active listening and other applications.  

E-Print Network (OSTI)

??This work deals with the problem of reverse audio engineering for active listening. The format under consideration corresponds to the audio CD. The musical content (more)

Gorlow, Stasnislaw

2013-01-01T23:59:59.000Z

389

Energy-efficient reverse osmosis desalination process  

Science Journals Connector (OSTI)

Abstract A novel energy-efficient reverse osmosis (EERO) process is proposed for which the retentate from single-stage reverse osmosis (SSRO) serves as the feed to a countercurrent membrane cascade with recycle (CMCR). The 3-stage EERO process employs two, whereas the 4-stage EERO process employs three stages in the CMCR. The EERO process is advantageous because of four features: (i) coupling SSRO with a CMCR; (ii) countercurrent retentate and permeate flow; (iii) permeate recycling; and (iv) retentate self-recycling owing to the use of one or more nanofiltration stages. The EERO process was compared to conventional SSRO for both processes operating at the thermodynamic limit and employing an energy-recovery device. For the same overall recovery the osmotic pressure differential is reduced by 33% and 50% relative to SSRO for the 3- and 4-stage ERRO processes, respectively. There is a critical recovery above which the EERO process also can reduce the specific energy consumption (SEC) relative to SSRO for the same recovery. For a typical seawater feed of 35g/L the 3-stage EERO process can achieve a 75% recovery at a net SEC of 2.746kWh/m3, an 11.0% reduction in the SEC relative to SSRO for the same recovery. The 4-stage EERO process can achieve a 75% recovery at the same net SEC as SSRO (3.086kWh/m3). Accounting for the additional membrane area required for the EERO process increases its cost relative to that for SSRO by at most 8%. An additional benefit of the EERO process relative to SSRO is the highly concentrated retentate that reduces the brine disposal volume or can be used to greatly increase the draw potential to harvest its osmotic potential energy via the pressure-retarded osmosis process.

Tzyy Haur Chong; Siew-Leng Loo; William B. Krantz

2015-01-01T23:59:59.000Z

390

Fault Detection, Diagnostics and Optimmization using BIG Data Analytics  

E-Print Network (OSTI)

111, Duke Street, Suite 3800 Montreal (Quebec) H3C 2M1 CANADA Tel : +1-514-866-5159 Fax : +1-514-866-2047 Fault Detection, diagnostics and optimization using BIG data analytics Presenter: IFCS Inc., Quebec, CANADA The past decade has seen... Joule AnalytiX management framework Unified Collector ? Syslog Events/SNMP ? Diagnostic Agent for Building Operations ? Performance Data ? System Health Data ? Feedback from BMS ? Johnson Controls ? Delta Controls ? Trane ? Siemens...

Bonifay, X.

2013-01-01T23:59:59.000Z

391

An expert system for fault detection and diagnosis  

E-Print Network (OSTI)

Major Subject: Electrical Engineering AN EXPERT SYSTEM FOR I AIJLT DETECTION AND DIAGNOSIS A Thesis by PREDRAG SPASOJEVIC Approv d as to style and content by; (, . I Mladen Kezunovic (Chair of ommitt R. Don Russell Ali Abur (Member) / /$t...:l~. , ~ 1 /z Karan L. Watson (Member) Wil iam M. Li y (Member . W. Howze (Head of Department) August 1992 ABSTRACT An Expert System 1' or Fault Detection and Diagnosis. (August 1992) Preclrag Spasojevic, Dipl. Ing. , University of Sarajevo Chair...

Spasojevic, Predrag

1992-01-01T23:59:59.000Z

392

Experimental characterization of faults on low-voltage systems  

E-Print Network (OSTI)

INTRODUCTION . Page II EXISTING DETECTION SCHEMES AND RESEARCH OBJECTIVES 8 Existing Detection Schemes Research Objectives III THEORY OF ARCS AND ARCING FAULTS 8 15 17 Formation of Spark Arc Chracteristics 17 18 IV FIELD TEST INSTRUMENTATION... EQUIPMENT . , V DESCRIPTION OF TESTS VI FIELD TESTS - GENERAL . . 30 VII DATA ANALYSIS, OBSERVATION AND SUMMARY . . 43 Time Domain Analysis . Frequency Domain Analysis Comparison with 15 kV Systems . Summary of Results . 44 56 67 72 REFERENCES...

Ahmed, Jubayer

1992-01-01T23:59:59.000Z

393

Small-scale faulting in the Upper Cretaceous of the Groningen block (The Netherlands): 3D seismic interpretation, fault plane analysis and regional paleostress  

Science Journals Connector (OSTI)

Over the last years, field-based studies have shown that fault surfaces can exhibit a considerable self-affine topography. It is reasonable to assume that similar undulations are also present in fault interpretations from 3D reflection seismic data, however both the interpretation uncertainty and geophysical resolution limits hinder their analysis. This study analyses a set of small-scale, non-reactivated faults in the Upper Cretaceous Chalk Group (Upper Ommelanden Formation) of the NW-part of the Groningen Block, the Netherlands, in a high quality Pre Stack Depth Migrated 3D seismic data set. The studied faults are fully contained inside the Chalk Group, in an area located between the major tectonic-bounding faults of the NW Groningen Block. Over 200 faults, with offsets in the order of 3050m, were interpreted across an area of ca. 150km2, showing a clear preferential orientation for strike, dip and dip-direction. Detailed interpretations and 3D fault plane analyses show undulations on the fault plane. We show that these undulations are not an interpretation or gridding artefact, and interpret these to indicate direction of fault slip. These results were used to calculate a paleostress tensor, using all faults to calculate a single stress tensor for the entire study area by Numerical Dynamic Analysis. Based on the orientation, position and a thickness analysis, it is interpreted that these faults formed due to the tectonic reactivation of salt structures in the Latest Cretaceous. The calculated paleostress state shows a general NWSE-extension, with a vertical maximum principle stress, and a stress ratio of about 0.3, indicating that the studied faults are not the result of dewatering. This interpretation agrees both with a nearby salt-tectonic reconstruction, as well as field-based paleostress results from the UK, Belgium and France. A first look at other surveys from the Dutch sector indicates that similar faults are present in other areas, with different orientations. We propose that a dedicated analysis of these faults across on- and offshore Europe would allow extending the stress map of the Late Cretaceous into areas where the Chalk is not outcropping.

Heijn van Gent; Stefan Back; Janos L. Urai; Peter Kukla

2010-01-01T23:59:59.000Z

394

Automatic fault detection on BIPV systems without solar irradiation data  

E-Print Network (OSTI)

BIPV systems are small PV generation units spread out over the territory, and whose characteristics are very diverse. This makes difficult a cost-effective procedure for monitoring, fault detection, performance analyses, operation and maintenance. As a result, many problems affecting BIPV systems go undetected. In order to carry out effective automatic fault detection procedures, we need a performance indicator that is reliable and that can be applied on many PV systems at a very low cost. The existing approaches for analyzing the performance of PV systems are often based on the Performance Ratio (PR), whose accuracy depends on good solar irradiation data, which in turn can be very difficult to obtain or cost-prohibitive for the BIPV owner. We present an alternative fault detection procedure based on a performance indicator that can be constructed on the sole basis of the energy production data measured at the BIPV systems. This procedure does not require the input of operating conditions data, such as solar ...

Leloux, Jonathan; Luna, Alberto; Desportes, Adrien

2014-01-01T23:59:59.000Z

395

Detachment Faulting and Geothermal Resources - An Innovative Integrated  

Open Energy Info (EERE)

Detachment Faulting and Geothermal Resources - An Innovative Integrated Detachment Faulting and Geothermal Resources - An Innovative Integrated Geological and Geophysical Investigation in Fish Lake Valley, Nevada Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Detachment Faulting and Geothermal Resources - An Innovative Integrated Geological and Geophysical Investigation in Fish Lake Valley, Nevada Project Type / Topic 1 Recovery Act: Geothermal Technologies Program Project Type / Topic 2 Validation of Innovative Exploration Technologies Project Description This program is designed to provide valuable new subsurface information about one of the Nation's arguably most promising high-temperature geothermal targets. Until now, the Emigrant Geothermal Prospect has been tested by only shallow and relatively shallow thermal-gradient boreholes and a small number of exploration wells, all of which have lacked any detailed 2-D or 3-D structural context. The applicants propose to conduct an innovative integration of detailed 2- D and 3-D structural reconstructions (structural mapping and reflection/refraction source seismology integrated with available data).

396

A Circuit Level Fault Model for Resistive Bridges ZHUO LI, XIANG LU, WANGQI QIU, WEIPING SHI and D. M. H. WALKER  

E-Print Network (OSTI)

A Circuit Level Fault Model for Resistive Bridges ZHUO LI, XIANG LU, WANGQI QIU, WEIPING SHI and D. M. H. WALKER Texas A&M University Delay faults are an increasingly important test challenge. Modeling bridge faults as delay faults helps delay tests to detect more bridge faults. Traditional bridge

Walker, Duncan M. "Hank"

397

Modeling fault-zone guided waves of microearthquakes in a geothermal  

Open Energy Info (EERE)

fault-zone guided waves of microearthquakes in a geothermal fault-zone guided waves of microearthquakes in a geothermal reservoir Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Modeling fault-zone guided waves of microearthquakes in a geothermal reservoir Details Activities (1) Areas (1) Regions (0) Abstract: Fault-zone guided waves have been identified in microearthquake seismograms recorded at the Coso Geothermal Field, California. The observed guided waves have particle motions and propagation group velocities similar to Rayleigh wave modes. A numerical method has been employed to simulate the guided-wave propagation through the fault zone. By comparing observed and synthetic waveforms the fault-zone width and its P- and S-wave velocity structure have been estimated. It is suggested here that the identification

398

High-Resolution Aeromagnetic Survey to Image Shallow Faults, Dixie Valley  

Open Energy Info (EERE)

Resolution Aeromagnetic Survey to Image Shallow Faults, Dixie Valley Resolution Aeromagnetic Survey to Image Shallow Faults, Dixie Valley Geothermal Field, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: High-Resolution Aeromagnetic Survey to Image Shallow Faults, Dixie Valley Geothermal Field, Nevada Abstract N/A Author V. J. S. Grauch Published U.S. Geological Survey, 2002 Report Number 02-384 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for High-Resolution Aeromagnetic Survey to Image Shallow Faults, Dixie Valley Geothermal Field, Nevada Citation V. J. S. Grauch. 2002. High-Resolution Aeromagnetic Survey to Image Shallow Faults, Dixie Valley Geothermal Field, Nevada. (!) : U.S. Geological Survey. Report No.: 02-384. Retrieved from "http://en.openei.org/w/index.php?title=High-Resolution_Aeromagnetic_Survey_to_Image_Shallow_Faults,_Dixie_Valley_Geothermal_Field,_Nevada&oldid=682601"

399

A High-Resolution Aeromagnetic Survey to Identify Buried Faults at Dixie Valley, Nevada  

SciTech Connect

Preliminary results from a high-resolution aeromagnetic survey (200m line spacing) acquired in Dixie Valley early in 2002 provide confirmation of intra-basin faulting based on subtle surface indications. In addition the data allow identification of the locations and trends of many faults that have not been recognized at the surface, and provide a picture of intrabasin faulting patterns not possible using other techniques. The data reveal a suite of northeasterly-trending curving and branching faults that surround a relatively coherent block in the area of Humboldt Salt Marsh, the deepest part of the basin. The producing reservoir occurs at the north end of this coherent block, where rampart faults from the northwest side of the valley merge with anthithetic faults from the central and southeast parts of the valley.

Smith, Richard Paul; Grauch, V. J. S.; Blackwell, David D.

2002-09-01T23:59:59.000Z

400

Interpretive geophysical fault map across the central block of Yucca Mountain, Nevada  

SciTech Connect

Geophysical data collected along 29 traverses across the central block of Yucca Mountain in southwest Nevada reveal anomalies associated with known fault sand indicate a number of possible concealed faults beneath the eastern flank of Yucca Mountain. Geophysical interpretations indicate that Midway Valley is characterized by several known and previously unknown faults, that the existence of the Yucca Wash fault is equivocal, and that the central part of the eastern flank of Yucca Mountain is characterized by numerous low-amplitude anomalies that probably reflect numerous small-scale faults. Gravity and magnetic data also reveal several large-amplitude anomalies that reflect larger-scale faulting along the margins of the central block.

Ponce, D.A.

1996-12-31T23:59:59.000Z

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


401

An integrated technique for fault location and section identification in distribution systems  

Science Journals Connector (OSTI)

Abstract This paper proposes an integrated impedance and transient-based formulation for fault location in distribution systems. The technique uses an extended apparent impedance analysis in order to estimate the fault distance, taking into account the unbalanced operation, intermediate loads, laterals, and time-varying load profile of distribution systems. The fault distance information is used in calculating characteristic frequencies associated to each possible fault location. A transient analysis is proposed to evaluate the spectral content of the fault-generated traveling wave, thus identifying its most significant frequency components. Based on the timefrequency correlation it is possible to eliminate the multiple estimates obtained from the impedance-based method, thus resulting in a single fault location. Aiming to verify the application of the proposed methodology, simulations were carried out in the ATP/EMTP Software considering a real distribution feeder with 3472 buses.

D.S. Gazzana; G.D. Ferreira; A.S. Bretas; A.L. Bettiol; A. Carniato; L.F.N. Passos; A.H. Ferreira; J.E.M. Silva

2014-01-01T23:59:59.000Z

402

Effect of HVDC line faults on transient torsional torques of turbine-generator shafts  

SciTech Connect

This paper investigates the effects of HVdc line faults, line de-energization, and line re-energization on the transient torsional stresses of steam turbine-generator (T-G) units. The studies are conducted on a bipole HVdc system which connects a T-G set to a large ac system. The shaft transient stresses of the T-G set as a result of HVac line fault, fault clearing, and automatic reclosure are also determined when the HVdc transmission system is replaced by an equivalent double-line HVac system. The EMTDC program is used for the simulation studies. The studies conclude that transient shaft stresses as a result of HVdc line fault and its subsequent switching events are (1) significantly less severe than those of HVac faults and subsequent switchings, and (2) not sensitive to the fault location and disturbance duration.

Shi, W. (Xi'an Jiaotong Univ. (China). Dept. of Electrical Engineering); Iravani, M.R. (Univ. of Toronto, Ontario (Canada). Dept. of Electrical Engineering)

1994-08-01T23:59:59.000Z

403

FDD Algorithm for an AHU Reverse-Return System  

E-Print Network (OSTI)

- effect rules for fault diagnosis, five operation faults were tested. Finally, the cause-effect rules for these ESL-IC-08-10-51 Proceedings of the Eighth International Conference for Enhanced Building Operations, Berlin, Germany, October 20-22, 2008... located across the riser taps at the most remote AHU, the one marked in Figure 1. ESL-IC-08-10-51 Proceedings of the Eighth International Conference for Enhanced Building Operations, Berlin, Germany, October 20-22, 2008 ?' 'rr ..Ll.~ .' ~>~f...

Djuric, N.; Novakovic, V.

404

Distributed Bayesian Algorithms for Fault-Tolerant Event Region Detection in Wireless Sensor Networks  

E-Print Network (OSTI)

We propose a distributed solution for a canonical task in wireless sensor networks---the binary detection of interesting environmental events. We explicitly take into account the possibility of sensor measurement faults and develop a distributed Bayesian algorithm for detecting and correcting such faults. Theoretical analysis and simulation results show that 85-95 percent of faults can be corrected using this algorithm, even when as many as 10 percent of the nodes are faulty.

Bhaskar Krishnamachari; Sitharama Iyengar

2004-01-01T23:59:59.000Z

405

Slip rate variations on normal faults during glacialinterglacial changes in surface loads  

Science Journals Connector (OSTI)

... Here we use finite-element models to investigate why four parallel normal faultsthe Wasatch, West Valley, Oquirrh and Stansbury faults in the eastern Basin and Range Province, Utahhave experienced ... We now test whether the Late Pleistocene/Holocene increase in slip rates of the Wasatch, West Valley, Oquirrh and Stansbury normal faults may be due to isostatic rebound caused by the ...

Ralf Hetzel; Andrea Hampel

2005-05-05T23:59:59.000Z

406

Structural character of the northern segment of the Paintbrush Canyon fault, Yucca Mountain, Nevada  

SciTech Connect

Detailed mapping of exposed features along the northern part of the Paintbrush Canyon fault was initiated to aid in construction of the computer-assisted three-dimensional lithostratigraphic model of Yucca Mountain, to contribute to kinematic reconstruction of the tectonic history of the Paintbrush Canyon fault, and to assist in the interpretation of geophysical data from Midway Valley. Yucca Mountain is segmented into relatively intact blocks of east-dipping Miocene volcanic strata, bounded by north-striking, west-dipping high-angle normal faults. The Paintbrush Canyon fault, representing the easternmost block-bounding normal fault, separates Fran Ridge from Midway Valley and continues northward across Yucca Wash to at least the southern margin of the Timber Mountain Caldera complex. South of Yucca Wash, the Paintbrush Canyon Fault is largely concealed beneath thick Quaternary deposits. Bedrock exposures to the north reveal a complex fault, zone, displaying local north- and west-trending grabens, and rhombic pull-apart features. The fault scarp, discontinuously exposed along a mapped length of 8 km north of Yucca Wash, dips westward by 41{degrees} to 74{degrees}. Maximum vertical offset of the Rhyolite of Comb Peak along the fault measures about 210 m in Paintbrush Canyon and, on the basis of drill hole information, vertical offset of the Topopoah Spring Tuff is about 360 m near the northern part of Fran Ridge. Observed displacement along the fault in Paintbrush Canyon is down to the west with a component of left-lateral oblique slip. Unlike previously proposed tectonic models, strata adjacent to the fault dip to the east. Quaternary deposits do not appear displaced along the fault scarp north of Yucca Wash, but are displaced in trenches south of Yucca Wash.

Dickerson, R.P. [Science Applications International Corp., Golden, CO (United States); Spengler, R.W. [Geological Survey, Denver, CO (United States)

1994-12-31T23:59:59.000Z

407

Tests of time reversal in neutron?nucleus scattering  

Science Journals Connector (OSTI)

Experiments to test time?reversal invariance are discussed. The experiments are based on observables constructed from the momentum and spin vectors of epithermal neutrons and from the spin of an aligned or polarized target. It is shown that the proposed tests are detailed balance tests of time?reversal invariance. The status of the experiments is briefly reviewed.

J. David Bowman

1988-01-01T23:59:59.000Z

408

Reducing current reversal time in electric motor control  

DOE Patents (OSTI)

The time required to reverse current flow in an electric motor is reduced by exploiting inductive current that persists in the motor when power is temporarily removed. Energy associated with this inductive current is used to initiate reverse current flow in the motor.

Bredemann, Michael V

2014-11-04T23:59:59.000Z

409

Hydrogenation of Magnesium Nickel Boride for Reversible Hydrogen Storage  

Science Journals Connector (OSTI)

Hydrogenation of Magnesium Nickel Boride for Reversible Hydrogen Storage ... Use of hydrogen for transportation applications requires materials that not only store hydrogen at high density but that can operate reversibly at temperatures and pressures below approximately 100 C and 10 bar, respectively. ... This composition is based on assuming the following complete hydrogenation reaction:which stores 2.6 wt % hydrogen. ...

Wen Li; John J. Vajo; Robert W. Cumberland; Ping Liu; Son-Jong Hwang; Chul Kim; Robert C. Bowman, Jr.

2009-11-06T23:59:59.000Z

410

Reverse Ecology: From Systems to Environments and Back  

E-Print Network (OSTI)

Chapter 15 Reverse Ecology: From Systems to Environments and Back Roie Levy and Elhanan Borenstein the environments in which they evolved and are adapted to. Re- verse Ecology--an emerging new frontier's ecology. The Reverse Ecology framework facilitates the translation of high-throughput genomic data

Borenstein, Elhanan

411

Synthesis of the Optimal 4-bit Reversible Circuits  

E-Print Network (OSTI)

Optimal synthesis of reversible functions is a non-trivial problem. One of the major limiting factors in computing such circuits is the sheer number of reversible functions. Even restricting synthesis to 4-bit reversible functions results in a huge search space (16!~2^44 functions). The output of such a search alone, counting only the space required to list Toffoli gates for every function, would require over 100 terabytes of storage. In this paper, we present an algorithm that synthesizes an optimal circuit for any 4-bit reversible specification. We employ several techniques to make the problem tractable. We report results from several experiments, including synthesis of random 4-bit permutations, optimal synthesis of all 4-bit linear reversible circuits, synthesis of existing benchmark functions, and distribution of optimal circuits. Our results have important implications for the design and optimization of quantum circuits, testing circuit synthesis heuristics, and performing experiments in the area of quantum information processing.

Oleg Golubitsky; Sean M. Falconer; Dmitri Maslov

2010-03-09T23:59:59.000Z

412

Linear multistep methods for integrating reversible differential equations  

E-Print Network (OSTI)

This paper studies multistep methods for the integration of reversible dynamical systems, with particular emphasis on the planar Kepler problem. It has previously been shown by Cano & Sanz-Serna that reversible linear multisteps for first-order differential equations are generally unstable. Here, we report on a subset of these methods -- the zero-growth methods -- that evade these instabilities. We provide an algorithm for identifying these rare methods. We find and study all zero-growth, reversible multisteps with six or fewer steps. This select group includes two well-known second-order multisteps (the trapezoidal and explicit midpoint methods), as well as three new fourth-order multisteps -- one of which is explicit. Variable timesteps can be readily implemented without spoiling the reversibility. Tests on Keplerian orbits show that these new reversible multisteps work well on orbits with low or moderate eccentricity, although at least 100 steps/radian are required for stability.

Wyn Evans; Scott Tremaine

1999-06-24T23:59:59.000Z

413

Plant experience with temporary reverse osmosis makeup water systems  

SciTech Connect

Pacific Gas and Electric (PG and E) Company's Diablo Canyon Power Plant (DCPP), which is located on California's central coast, has access to three sources of raw water: creek water, well water, and seawater. Creek and well water are DCPP's primary sources of raw water; however, because their supply is limited, these sources are supplemented with seawater. The purpose of this paper is to discuss the temporary, rental, reverse osmosis systems used by PG and E to process DCPP's raw water into water suitable for plant makeup. This paper addresses the following issues: the selection of reverse osmosis over alternative water processing technologies; the decision to use vendor-operated temporary, rental, reverse osmosis equipment versus permanent PG and E-owned and -operated equipment; the performance of DCPP's rental reverse osmosis systems; and, the lessons learned from DCPP's reverse osmosis system rental experience that might be useful to other plants considering renting similar equipment.

Polidoroff, C.

1986-01-01T23:59:59.000Z

414

Data Acquisition-Manipulation At San Jacinto Fault Geothermal Area (1982) |  

Open Energy Info (EERE)

Fault Geothermal Area (1982) Fault Geothermal Area (1982) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Data Acquisition-Manipulation At San Jacinto Fault Geothermal Area (1982) Exploration Activity Details Location San Jacinto Fault Geothermal Area Exploration Technique Data Acquisition-Manipulation Activity Date 1982 Usefulness useful DOE-funding Unknown Exploration Basis Develop parameters to identify geothermal region Notes Statistical methods are outlined to separate spatially, temporally, and magnitude-dependent portions of both the random and non-random components of the seismicity. The methodology employed compares the seismicity distributions with a generalized Poisson distribution. Temporally related events are identified by the distribution of the interoccurrence times.

415

E-Print Network 3.0 - automatical adaptive fault Sample Search...  

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

Abstract. In robotics, exogenous fault detection is the process ... Source: Birattari, Mauro - Computer and Decision Engineering Department, Universit Libre de Bruxelles; Libre...

416

E-Print Network 3.0 - adaptive fault detection Sample Search...  

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

through which one robot detects faults... that occur in other, ... Source: Birattari, Mauro - Computer and Decision Engineering Department, Universit Libre de Bruxelles; Libre...

417

E-Print Network 3.0 - active fault detection Sample Search Results  

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

the adjudged or hypothesized cause... of an error. A fault is active ... Source: Powell, David - Laboratoire d'Analyse et d'Architecture des Systmes du CNRS Collection:...

418

Critical behaviour and the evolution of fault strength during earthquake cycles  

Science Journals Connector (OSTI)

... the surrounding fault area. As this area accumulates further slip, it will strengthen and roughen as asperities are selected for. d, Cumulative slip for 10 smaller aftershocks. ...

Moritz Heimpel

1997-08-28T23:59:59.000Z

419

E-Print Network 3.0 - algorithmic fault tree Sample Search Results  

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

Computer Technologies and Information Sciences 13 A Methodology for Stochastic Fault Simulation in VLSI Processor Architectures Christian J. Hescott, Drew C. Ness, David J....

420

E-Print Network 3.0 - automated fault detection Sample Search...  

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

Computer Science, Massachusetts Institute of Technology (MIT) Collection: Engineering 13 Modeling Consumer-Perceived Web Application Fault Severities for Testing Summary: a fully...

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


421

FAULT DETECTION IN NUCLEAR POWER PLANTS COMPONENTS BY A COMBINATION OF STATISTICAL METHODS  

E-Print Network (OSTI)

FAULT DETECTION IN NUCLEAR POWER PLANTS COMPONENTS BY A COMBINATION OF STATISTICAL METHODS Independent Component Analysis nc Normal conditions NPP Nuclear Power Plant PCA Principal Component Analysis

Paris-Sud XI, Université de

422

SciTech Connect: Development of Asset Fault Signatures for Prognostic...  

Office of Scientific and Technical Information (OSTI)

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...

423

C-testability of a ripple carry adder under multiple faults  

E-Print Network (OSTI)

. Fault Types IV FAULT SIMULATION AND EXPERIMENT . A. Physical Line Fault Simulation . 1. Layout 2. Simulation B. Functional Fault Simulation and Experiment . 1. Probability of Un-detection 2. Efficiency of the Test Vectors and Reduced Test V...'hey proposed a, shortened near-minimal set of test vectors for an ILA under SCFM. Further improvements to the problem of testing ILAs under MCFM were pro- vided by Cheng and Patel in [2]. This paper derives the necessary and sufficient conditions of a...

Bommena, Manoher V.

2012-06-07T23:59:59.000Z

424

Fault Detection and Diagnosis for Brine to Water Heat Pump Systems.  

E-Print Network (OSTI)

?? This research project is part of a wider project called Smart Fault Detection and Diagnosis for HeatPump Systems currently under development by the Royal (more)

Vecchio, Daniel

2014-01-01T23:59:59.000Z

425

Power System Feedback from High-Tc Superconductor Shielded Core Fault Current Limiter  

Science Journals Connector (OSTI)

The shielded core fault current limiter is attractive with high critical temperature superconductors. ... acts during normal operation as an ideally shorted current transformer; the secondary superconducting loop...

J. Gerhold

1998-01-01T23:59:59.000Z

426

Stepover or Relay Ramp in Normal Fault Zones | Open Energy Information  

Open Energy Info (EERE)

Multiple intersections between the overlapping fault strands results in increased fracture density that enhances hydrothermal fluid flow. Other definitions:Wikipedia Reegle...

427

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

SciTech Connect

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.

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

2011-03-01T23:59:59.000Z

428

Novel Coupled Thermochronometric and Geochemical Investigation of Blind Geothermal Resources in Fault-Controlled Dilational Corners  

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

Novel Coupled Thermochronometric and Geochemical Investigation of Blind Geothermal Resources in Fault-Controlled Dilational Corners presentation at the April 2013 peer review meeting held in Denver, Colorado.

429

A History of Research in Fault Tolerant Computing at SRI International  

Science Journals Connector (OSTI)

This paper offers a history of the research in fault-tolerant computing at the Computer Science Laboratory of SRI International. This research program, one of several...

Jack Goldberg

1987-01-01T23:59:59.000Z

430

Fault-Based Attack of RSA Authentication Andrea Pellegrini, Valeria Bertacco and Todd Austin  

E-Print Network (OSTI)

a straightforward design architecture that en- tails a small silicon footprint and low-power profile. Our research enviromental manipulations. Our fault-based attack can be succ

Austin, Todd M.

431

BIMETALLIC LITHIUM BOROHYDRIDES TOWARD REVERSIBLE HYDROGEN STORAGE  

SciTech Connect

Borohydrides such as LiBH{sub 4} have been studied as candidates for hydrogen storage because of their high hydrogen contents (18.4 wt% for LiBH{sub 4}). Limited success has been made in reducing the dehydrogenation temperature by adding reactants such as metals, metal oxides and metal halides. However, full rehydrogenation has not been realized because of multi-step decomposition processes and the stable intermediate species produced. It is suggested that adding second cation in LiBH{sub 4} may reduce the binding energy of B-H. The second cation may also provide the pathway for full rehydrogenation. In this work, several bimetallic borohydrides were synthesized using wet chemistry, high pressure reactive ball milling and sintering processes. The investigation found that the thermodynamic stability was reduced, but the full rehydrogenation is still a challenge. Although our experiments show the partial reversibility of the bimetallic borohydrides, it was not sustainable during dehydriding-rehydriding cycles because of the accumulation of hydrogen inert species.

Au, M.

2010-10-21T23:59:59.000Z

432

Liquid suspensions of reversible metal hydrides  

DOE Patents (OSTI)

The reversibility of the process M + x/2 H/sub 2/ ..-->.. MH/sub x/, where M is a metal hydride former that forms a hydride MH/sub x/ in the presence of H/sub 2/, generally used to store and recall H/sub 2/, is found to proceed under a liquid, thereby to reduce contamination, provide better temperature control and provide in situ mobility of the reactants. Thus, a slurry of particles of a metal hydride former with an inert solvent is subjected to temperature and pressure controlled atmosphere containing H/sub 2/, to store hydrogen (at high pressures) and to release (at low pressures) previously stored hydrogen. The direction of the flow of the H/sub 2/ through the liquid is dependent upon the H/sub 2/ pressure in the gas phase at a given temperature. When the former is above the equilibrium absorption pressure of the respective hydride the reaction proceeds to the right, i.e., the metal hydride is formed and hydrogen is stored in the solid particle. When the H/sub 2/ pressure in the gas phase is below the equilibrium dissociation pressure of the respective hydride the reaction proceeds to the left, the metal hydride is decomposed and hydrogen is released into the gas phase.

Reilly, J.J.; Grohse, E.W.; Winsche, W.E.

1983-12-08T23:59:59.000Z

433

POLAR FIELD REVERSAL OBSERVATIONS WITH HINODE  

SciTech Connect

We have been monitoring yearly variation in the Sun's polar magnetic fields with the Solar Optical Telescope aboard Hinode to record their evolution and expected reversal near the solar maximum. All magnetic patches in the magnetic flux maps are automatically identified to obtain the number density and magnetic flux density as a function of the total magnetic flux per patch. The detected magnetic flux per patch ranges over four orders of magnitude (10{sup 15}-10{sup 20} Mx). The higher end of the magnetic flux in the polar regions is about one order of magnitude larger than that of the quiet Sun, and nearly that of pores. Almost all large patches ({>=}10{sup 18} Mx) have the same polarity, while smaller patches have a fair balance of both polarities. The polarity of the polar region as a whole is consequently determined only by the large magnetic concentrations. A clear decrease in the net flux of the polar region is detected in the slow rising phase of the current solar cycle. The decrease is more rapid in the north polar region than in the south. The decrease in the net flux is caused by a decrease in the number and size of the large flux concentrations as well as the appearance of patches with opposite polarity at lower latitudes. In contrast, we do not see temporal change in the magnetic flux associated with the smaller patches (<10{sup 18} Mx) and that of the horizontal magnetic fields during the years 2008-2012.

Shiota, D. [Advanced Science Institute, RIKEN (Institute of Physics and Chemical Research), Wako, Saitama 351-0198 (Japan); Tsuneta, S.; Shimojo, M.; Orozco Suarez, D.; Ishikawa, R. [National Astronomical Observatory of Japan (NAOJ), Mitaka, Tokyo 181-8588 (Japan); Sako, N., E-mail: shiota@riken.jp [Department of Astronomical Science, The Graduate University for Advanced Studies, Mitaka, Tokyo 181-8588 (Japan)

2012-07-10T23:59:59.000Z

434

Durability Evaluation of Reversible Solid Oxide Cells  

SciTech Connect

An experimental investigation on the performance and durability of single solid oxide cells (SOCs) is under way at the Idaho National Laboratory. Reversible operation of SOCs includes electricity generation in the fuel cell mode and hydrogen generation in the electrolysis mode. Degradation is a more significant issue when operating SOCs in the electrolysis mode. In order to understand and mitigate the degradation issues in high temperature electrolysis, single SOCs with different configurations from several manufacturers have been evaluated for initial performance and long-term durability. A new test apparatus for single cell and small stack tests has been developed for this purpose. Cells were obtained from four industrial partners. Cells from Ceramatec Inc. and Materials and Systems Research Inc. (MSRI) showed improved durability in electrolysis mode compared to previous stack tests. Cells from Saint Gobain Advanced Materials Inc. (St. Gobain) and SOFCPower Inc. demonstrated stable performance in the fuel cell mode, but rapid degradation in the electrolysis mode, especially at high current density. Electrolyte-electrode delamination was found to have a significant impact on degradation in some cases. Enhanced bonding between electrolyte and electrode and modification of the electrode microstructure helped to mitigate degradation. Polarization scans and AC impedance measurements were performed during the tests to characterize cell performance and degradation.

Xiaoyu Zhang; James E. O'Brien; Robert C. O'Brien; Gregory K. Housley

2013-11-01T23:59:59.000Z

435

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

SciTech Connect

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. #15; 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.

Panda, Dhabaleswar Kumar [The Ohio State University; Beckman, Pete

2011-07-01T23:59:59.000Z

436

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)

The further exploration and development of Pabst Gas Field with faulted sand reservoirs require an understanding of the properties and roles of faults, particularly Low Throw near Vertical Faults (LTNVFs), in gas migration and accumulation at a...

Li, Yuqian

2006-08-16T23:59:59.000Z

437

Microstructural characterization of high-manganese austenitic steels with different stacking fault energies  

SciTech Connect

Microstructures of tensile-deformed high-manganese austenitic steels exhibiting twinning-induced plasticity were analyzed by electron backscatter diffraction pattern observation and X-ray diffraction measurement to examine the influence of differences in their stacking fault energies on twinning activity during deformation. The steel specimen with the low stacking fault energy of 15 mJ/m{sup 2} had a microstructure with a high population of mechanical twins than the steel specimen with the high stacking fault energy (25 mJ/m{sup 2}). The <111> and <100> fibers developed along the tensile axis, and mechanical twinning occurred preferentially in the <111> fiber. The Schmid factors for slip and twinning deformations can explain the origin of higher twinning activity in the <111> fiber. However, the high stacking fault energy suppresses the twinning activity even in the <111> fiber. A line profile analysis based on the X-ray diffraction data revealed the relationship between the characteristics of the deformed microstructures and the stacking fault energies of the steel specimens. Although the variation in dislocation density with the tensile deformation is not affected by the stacking fault energies, the effect of the stacking fault energies on the crystallite size refinement becomes significant with a decrease in the stacking fault energies. Moreover, the stacking fault probability, which was estimated from a peak-shift analysis of the 111 and 200 diffractions, was high for the specimen with low stacking fault energy. Regardless of the difference in the stacking fault energies of the steel specimens, the refined crystallite size has a certain correlation with the stacking fault probability, indicating that whether the deformation-induced crystallite-size refinement occurs depends directly on the stacking fault probability rather than on the stacking fault energies in the present steel specimens. - Highlights: {yields} We studied effects of stacking fault energies on deformed microstructures of steels. {yields} Correlations between texture and occurrence of mechanical twinning are discussed. {yields} Evolutions of dislocations and crystallite are analyzed by line profile analysis.

Sato, Shigeo, E-mail: s.sato@imr.tohoku.ac.jp [Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan); Kwon, Eui-Pyo [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan); Imafuku, Muneyuki [Faculty of Engineering, Tokyo City University, Tokyo 158-8557 (Japan); Wagatsuma, Kazuaki [Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan); Suzuki, Shigeru [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan)

2011-08-15T23:59:59.000Z

438

A comparison of ROChem reverse osmosis and spiral wound reverse osmosis membrane modules  

SciTech Connect

Testing of the ROChem Disc Tube[reg sign] reverse osmosis (RO) module's performance on biologically active feed waters has been completed. Both the ROChem module (using Filmtec standard-rejection seawater membranes) and the Filmtec spiral-wound membrane module (using Filmtec high-rejection seawater membranes) were tested with stimulant solutions containing typical bacteria and metal hydroxide levels found in the F/H Effluent Treatment Facility (ETF) influent. Results indicate that the ROChem module gave superior performance over the spiral-wound module. Water flux losses were reduced by over 30% for water recoveries above 40%.

Siler, J.L.

1992-01-31T23:59:59.000Z

439

A comparison of ROChem reverse osmosis and spiral wound reverse osmosis membrane modules  

SciTech Connect

Testing of the ROChem Disc Tube{reg_sign} reverse osmosis (RO) module`s performance on biologically active feed waters has been completed. Both the ROChem module (using Filmtec standard-rejection seawater membranes) and the Filmtec spiral-wound membrane module (using Filmtec high-rejection seawater membranes) were tested with stimulant solutions containing typical bacteria and metal hydroxide levels found in the F/H Effluent Treatment Facility (ETF) influent. Results indicate that the ROChem module gave superior performance over the spiral-wound module. Water flux losses were reduced by over 30% for water recoveries above 40%.

Siler, J.L.

1992-01-31T23:59:59.000Z

440

On elongated stacking fault loops in TiAl  

SciTech Connect

Depending upon strain, load orientation, alloy composition and test temperature, the deformation microstructure of TiAl contains a varied density of stacking faults ribbons. The presence of these ribbons is correlated with that of superdislocations with 1/2{l_angle}112[square bracket] Burgers vector. They are elongated along any of the {l_angle}011[square bracket] directions. The present paper focuses on their formation mechanism, especially on the reasons which make that such dipolar defects, though intrinsically unstable, tend to exhibit a reasonably constant width.

Hug, G.; Veyssiere, P. [CNRS-ONERA, Chatillon (France)

1995-12-31T23:59:59.000Z

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


441

Analysis of transmission system faults in the phase domain  

E-Print Network (OSTI)

the zero, positive and negative sequences. d) Calculate the post-fault line current ij 2 2 2 ij j ij z VI ?= (2.15) where ij is the primitive impedance element between nodes i and j. After all these sequence quantities... in Figure 5. The data of this system is listed in Tables 1, 2, and 3. Figure 5. System diagram for the 3-bus system Table 1 Generator data (3 Bus system) Generator impedance(p.u.) # Gen. connection P N Z 1 Y-grounded 0.05j 0.05j 0.15j 2...

Zhu, Jun

2004-11-15T23:59:59.000Z

442

Superconducting fault-current limiter and inductor design  

SciTech Connect

A superconducting fault current limiter (SFCL) that uses a biased superconducting inductor in a diode or thyristor bridge circuit was analyzed for transmission systems in 69, 138, and 230 rms kV utility transmission systems. The limiter was evaluated for costs with all components - superconducting coil, diode and/or SCR power electronics, high voltage insulation, high voltage bushings and vapor cooled leads, dewar, and refrigerator - included. A design was undertaken for the superconducting cable and coils for both diode and SCR 69 kV limiter circuits.

Rogers, J.D.; Boenig, H.J.; Chowdhuri, P.; Schermer, R.I.; Wollan, J.J.; Weldon, D.M.

1982-01-01T23:59:59.000Z

443

Argonne CNM Highlight: Reverse Chemical Switching of a Ferroelectric Film  

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

Reverse Chemical Switching of a Ferroelectric Film Reverse Chemical Switching of a Ferroelectric Film Reverse Chemmical Switching of a Ferroelectric Film Ferroelectric materials display a spontaneous electric polarization below the Curie temperature that can be reoriented, typically by applying an electric field. In this study, researchers from Argonne, Northern Illinois University, and The University of Pennsylvania have demonstrated that the chemical environment can control the polarization orientation in an ultrathin ferroelectric film. This is complementary to recent predictions that polarization can affect surface chemistry and illuminates potential applications in sublithographic patterning and electrically tunable catalysts. In situ synchrotron X-ray scattering measurements showed that high or low

444

Biphase turbine for reverse osmosis desalination. Final report  

SciTech Connect

A new hydraulic reaction turbine was designed to recover the power available in the high-pressure waste-brine stream of reverse osmosis desalination systems. A reaction turbine sized for reverse-osmosis systems producing 600 gph was built and tested. The turbine performed well driving either a variable-speed pump or an electrical generator. Measured turbine efficiency (shaft power divided by available power) was 63%, compared with a prediction of 67%. The turbine can be built with larger capacity to reduce the size, weight and power consumption of reverse osmosis desalination systems. Efficiency of larger units is predicted to lie in the range of 65 to 70%.

Limburg, P.L.

1982-12-01T23:59:59.000Z

445

Frictional behaviour of halite/muscovite fault gouge analogues: Effects of sliding velocity and of stepwise acceleration from sub- to co-seismic slip rates.  

E-Print Network (OSTI)

??Investigating the (transient) frictional behaviour of fault rock from low to high velocities is required in experimental research on the stability of faults and earthquake (more)

Buijze, A.J.L.

2010-01-01T23:59:59.000Z

446

Purication of reghting water containing a uorinated surfactant by reverse osmosis coupled to  

E-Print Network (OSTI)

Purication of reghting water containing a uorinated surfactant by reverse osmosis coupled. Reverse osmosis of pretreated pilot reghting water and concentrated model solutions of pretreated reghting. The concentrate from reverse osmosis could be recycled in electrocoagulation-ltration. Experimental results

Paris-Sud XI, Université de

447

Fouling of reverse osmosis membranes by hydrocarbonated and fluorinated surfactants contained in firefighting water  

E-Print Network (OSTI)

Title: Fouling of reverse osmosis membranes by hydrocarbonated and fluorinated surfactants osmosis efficiently treated the water from fire extinguishment. In this work we focused on the reverse surfactants [1]. Experimental results indicated that electrocoagulation and filtration followed by reverse

Paris-Sud XI, Université de

448

Removal of radionuclides in drinking water by membrane treatment using ultrafiltration, reverse osmosis and electrodialysis reversal  

Science Journals Connector (OSTI)

A pilot plant had been built to test the behaviour of ultrafiltration (UF), reverse osmosis (RO), and electrodialysis reversal (EDR) in order to improve the quality of the water supplied to Barcelona metropolitan area from the Llobregat River. This paper presents results from two studies to reduce natural radioactivity. The results from the pilot plant with four different scenarios were used to design the full-scale treatment plant built (SJD WTP). The samples taken at different steps of the treatment were analysed to determine gross alpha, gross beta and uranium activity. The results obtained revealed a significant improvement in the radiological water quality provided by both membrane techniques (RO and EDR showed removal rates higher than 60%). However, UF did not show any significant removal capacity for gross alpha, gross beta or uranium activities. RO was better at reducing the radiological parameters studied and this treatment was selected and applied at the full scale treatment plant. The RO treatment used at the SJD WTP reduced the concentration of both gross alpha and gross beta activities and also produced water of high quality with an average removal of 95% for gross alpha activity and almost 93% for gross beta activity at the treatment plant.

M. Montaa; A. Camacho; I. Serrano; R. Devesa; L. Matia; I. Valls

2013-01-01T23:59:59.000Z

449

A hybrid system for fault detection and sensor fusion based on fuzzy clustering and artificial immune systems  

E-Print Network (OSTI)

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...

Jaradat, Mohammad Abdel Kareem Rasheed

2007-04-25T23:59:59.000Z

450

Detection and diagnosis of faults and energy monitoring of HVAC systems with least-intrusive power analysis  

E-Print Network (OSTI)

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 ...

Luo, Dong, 1966-

2001-01-01T23:59:59.000Z

451

Development, Updating and Long-Term Operations of a 10.5 kV HTS Fault Current Limiter  

Science Journals Connector (OSTI)

There are many irreplaceable advantages of high temperature superconducting (HTS) fault current limiter, applying in electric utilities. It is expected to be able to solve excessive fault current problems and to ...

J. Zhang; S. Dai; Y. Teng; D. Zhang; N. Song

2014-10-01T23:59:59.000Z

452

Study On Magnetic Shielding Type Superconducting Fault Current Limiter Using Bi-Sr-Ca-Cu-O Cylinder  

Science Journals Connector (OSTI)

The power application of a superconductor to restrain a fault current has been researched. A superconducting fault current limiter using a Bi-Sr-Ca-Cu-O cylinder has been developed. This limiter consists of the p...

Michiharu Ichikawa; Hiroyuki Kado; Kunikazu Izumi

1994-01-01T23:59:59.000Z

453

A Conceptual Design of Superconducting Fault Current Limiter with Bi2223 in 6.6 kV Distribution System  

Science Journals Connector (OSTI)

We have proposed a new type fault current limiter, which consists of a flux-lock reactor...c...superconducting (HTS) element and ac magnetic field coil (Flux-Lock Type Fault Current Limiter: FLT-FCL). This paper ...

Yu-Hong Guo; Toshiyuki Uchii; Yasunobu Yokomizu

1998-01-01T23:59:59.000Z

454

Monitoring overburden layer changes and fault movements from time-lapse seismic data on the Valhall Field  

Science Journals Connector (OSTI)

......growth fault in the Frio formation, Texas Gulf Coast, Geophysics, 54, 426-439...surface faulting in the Houston-Galveston area, Texas related to deep fluid withdrawal...hydrocarbon production, southeastern Texas coast, J. Coastal Res., 13......

Thomas Rste; Martin Landr; Paul Hatchell

2007-09-01T23:59:59.000Z

455

Fault Wear by Damage Evolution During Steady-State Slip VLADIMIR LYAKHOVSKY,1  

E-Print Network (OSTI)

, the wear leads to the establishment of gouge and cataclasite zones (Fig. 1b) that range in thickness fromFault Wear by Damage Evolution During Steady-State Slip VLADIMIR LYAKHOVSKY,1 AMIR SAGY,1 YUVAL BONEH,2 and ZE'EV RECHES 3 Abstract--Slip along faults generates wear products such as gouge layers

Lyakhovsky, Vladimir

456

Improving Model-Based Gas Turbine Fault Diagnosis Using Multi-Operating Point Method  

Science Journals Connector (OSTI)

A comprehensive gas turbine fault diagnosis system has been designed using a full nonlinear simulator developed in Turbotec company for the V94.2 industrial gas turbine manufactured by Siemens AG. The methods used for detection and isolation of faulty ... Keywords: monitoring, fault diagnosis, extended Kalman filter, gas turbine, simulator

Amin Salar; Seyed Mehrdad Hosseini; Behnam Rezaei Zangmolk; Ali Khaki Sedigh

2010-11-01T23:59:59.000Z

457

A Fully Automated Fault-tolerant System for Distributed Video Processing and Off-site Replication  

E-Print Network (OSTI)

A Fully Automated Fault-tolerant System for Distributed Video Processing and Off-site Replication been a failure-prone tedious operation with an operator needed to babysit the processing and off-site, off-site replication, fault-tolerance, grid, educational research. 1. INTRODUCTION In different fields

Wisconsin at Madison, University of

458

Resistive Bridge Fault Modeling,Simulationand Test Generation Vijay R. Sar-Dessai  

E-Print Network (OSTI)

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

Walker, Duncan M. "Hank"

459

Computation of the split factor of earth fault currents by considering the proximity effects  

Science Journals Connector (OSTI)

To determine a safe substation grounding grid in power systems, it is important to compute the split factor for earth fault current including the proximity influences among the grid and the earthing systems of the incoming/outgoing transmission lines' ... Keywords: earth fault currents, grounding grid design, proximity effects, split factor, touch and step voltages

N. Ramezani; S. M. Shahrtash

2010-06-01T23:59:59.000Z

460

A Smart Algorithm for the Diagnosis of Short-Circuit Faults in a Photovoltaic Generator  

E-Print Network (OSTI)

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

Paris-Sud XI, Université de

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


461

Fault Models and Test Generation for Hardware-Software Covalidation Ian G. Harris  

E-Print Network (OSTI)

use of hardware-software systems in cost-critical and life-critical applications has led to heightenedFault Models and Test Generation for Hardware-Software Covalidation £ Ian G. Harris Department: Hardware-Software Covalidation, Design Validation, Test Generation, Fault Models Abstract The increasing

Harris, Ian G.

462

Erosion, fault initiation and topographic growth of the North Qilian Shan (northern Tibetan Plateau)  

Science Journals Connector (OSTI)

...faulting broadly conforms to the step-wise growth model of plateau formation (Tapponnier...stage of orogenisis. Unlike the step-wise model, we suggest that the late Miocene...fault throw. We thank Lindsey Hedges, Alison Duvall, Peter Molnar, and support by...

Dewen Zheng; Marin K. Clark; Peizhen Zhang; Wenjun Zheng; Kenneth A. Farley

463

Model Checking a Fault-Tolerant Startup Algorithm: From Design Exploration To  

E-Print Network (OSTI)

automated using a simulator or rapid prototype and such automation may increase the number of scenarios rapidly and eventually becomes infeasible as the size of the model grows, so that abstractionModel Checking a Fault-Tolerant Startup Algorithm: From Design Exploration To Exhaustive Fault

Pfeifer, Holger

464

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

465

Power saving and fault-tolerance in real-time critical embedded systems  

Science Journals Connector (OSTI)

In this paper, a method with the double purpose of reducing the consumption of energy and giving a deterministic guarantee on the fault tolerance of real-time embedded systems operating under the Rate Monotonic discipline is presented. A lower bound ... Keywords: Embedded systems, Energy-aware, Fault-tolerance, Real-time

Rodrigo M. Santos; Jorge Santos; Javier D. Orozco

2009-02-01T23:59:59.000Z

466

Integrated Fault Detection and Isolation: Application to a Winery's Wastewater Treatment Plant  

Science Journals Connector (OSTI)

In this paper, an integrated object-oriented fuzzy logic fault detection and isolation (FDI) module for a biological wastewater treatment process is presented. The defined FDI strategy and the software implementation are detailed. Using experimental ... Keywords: anaerobic digestion, fuzzy logic, object-oriented programming, on-line fault detection and isolation (FDI), wastewater treatment

Antoine Genovesi; Jrme Harmand; Jean-Philippe Steyer

2000-07-01T23:59:59.000Z

467

Automated Analysis of Fault-Tolerance in Distributed Systems Scott D. Stoller y  

E-Print Network (OSTI)

Automated Analysis of Fault-Tolerance in Distributed Systems #3; Scott D. Stoller y Computer satisfy in speci#12;ed failure scenarios. Our analysis method is to compute, for each failure scenario for which the user speci#12;ed a fault-tolerance requirement, an MFG representing the system's communication

Schneider, Fred B.

468

Incorporating Fault Tolerance in Analog-to-Digital Converters (ADCs) Mandeep Singh  

E-Print Network (OSTI)

systems can be increased by applying a two-step procedure start- ing with sensitivity analysis followed transients are discussed. 1. Introduction Critical systems used in space, avionics and biomed- ical the improve- ment in the reliability of the system. Fault sensitivity analysis involves injection of faults

Koren, Israel

469

Geological investigation of a lineated massif at the Kane Transform Fault: implications for oceanic core complexes  

Science Journals Connector (OSTI)

...al. 1998; Blackman et al. 1998) and marine multichannel seismic data (White et al...or as striations formed by abrasional wear along a fault surface (Cann et al. 1997...they are not the products of abrasional wear on frictional fault zones, they need not...

1999-01-01T23:59:59.000Z

470

The Functional Design on Fault Recorder of C / OS-II-based Intelligent Substation  

Science Journals Connector (OSTI)

Regarding the functional requirements for smart substation in fault recorder, this paper introduced C / OSII, an embedded real-time multitasking operating system as the functional design. The program works with the embedded operating system, the ... Keywords: intelligent substation, fault recorder, embedded operating systems, the ?C / OS-II, state machine

Zhang Yihui; Hu Wenqiang; Liu Shiming; Wang Huabin; Zhang Haiyan

2012-04-01T23:59:59.000Z

471

The role of the digital fault recorder in the automated substation  

SciTech Connect

This paper addresses the role of the digital fault recorder in the automated substation. The topics of the paper include distributed architecture, the substation LAN and reduced installation costs, multiple functions, improved substation intelligence, record generation and record merging, fault summaries, master station software, and future considerations.

Brandt, J.D. [Hathaway Corp., Littleton, CO (United States)

1996-10-01T23:59:59.000Z

472

A compiler-based infrastructure for fault-tolerant co-design  

Science Journals Connector (OSTI)

The protection of processor-based systems to mitigate the harmful effects of transient faults (hardening) is gaining importance as technology shrinks. Hybrid hardware/software hardening approaches are promising alternatives in the design of such ... Keywords: co-design, fault-tolerance, hardening, single event effect (SEE), single event upset (SEU)

Felipe Restrepo-Calle; Antonio Martnez-lvarez; Hiplito Guzmn-Miranda; F. R. Palomo; M. A. Aguirre; Sergio Cuenca-Asensi

2010-06-01T23:59:59.000Z

473

Embryonics: A Bio-Inspired Cellular Architecture with Fault-Tolerant Properties  

Science Journals Connector (OSTI)

This paper details and expands the work on Embryonics, a recently proposed fault-tolerant cellular architecture with reconfiguration properties inspired by the ontogenetic development of multicellular systems. The design of a selector-based embryonic ... Keywords: FPGAs, bio-inspired systems, embryonics, fault-tolerant systems, reliability models

Cesar Ortega-Sanchez; Daniel Mange; Steve Smith; Andy Tyrrell

2000-07-01T23:59:59.000Z

474

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

SciTech Connect

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.

Faunt, C.C.

1997-12-31T23:59:59.000Z

475

Mechanical fault detection in induction motor drives through stator current monitoring -Theory  

E-Print Network (OSTI)

. Common failures occurring in electrical drives can be roughly classified into: Electrical faults: stator in the load part of the drive) A reliability survey on large electric motors (>200 HP) revealed that most drive including the load, but they show that mechanical fault detection is of great concern in electric

Paris-Sud XI, Université de

476

An On-line Method for Stator Fault Detection in Multi-phase PMSM Drives  

E-Print Network (OSTI)

An On-line Method for Stator Fault Detection in Multi-phase PMSM Drives Fabien Meinguet*, Eric deals with an on-line fault detection method for multi-phase PMSM drives. The method is based have been investigated for transport applications such as hybrid electric vehicle [1], [2] and ship

Paris-Sud XI, Université de

477

Fault Tolerant Photodiode and Photogate Active Pixel Sensors , Glenn H. Chapmana  

E-Print Network (OSTI)

Fault Tolerant Photodiode and Photogate Active Pixel Sensors Cory Junga , Glenn H. Chapmana, this design can correct for most defects allowing for higher production yields. Fault tolerant photodiode and photogate APS' were fabricated in 0.18-micron technology. Testing showed that the photodiode APS could

Chapman, Glenn H.

478

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

E-Print Network (OSTI)

-scale power converter WT concept, the DFIG offers some advantages, such as reduced inverter and output filterHigh-Order Sliding Mode Control for DFIG-Based Wind Turbine Fault Ride-Through Mohamed Benbouzid with the Fault Ride-Through (FRT) capability assessment of a Doubly-Fed Induction Generator (DFIG)-based Wind

Paris-Sud XI, Université de

479

Impact of VSC faults on dynamic performance and low voltage ride through of DFIG  

Science Journals Connector (OSTI)

Abstract A doubly-fed induction generators (DFIGs) sensitivity to external faults has motivated researchers to investigate the impact of various grid disturbances, such as voltage sags and short circuit faults, on its low-voltage ride-through (LVRT) capability. However, no attention has been paid to the impact of internal faults in voltage source converters (VSCs), that interface a DFIG with the grid, on the dynamic performance of the machine. This paper investigates the impacts of various VSC faults, on the dynamic performance and LVRT capability of a DFIG. Faults such as open and short circuit within VSC switches and across the DC-link capacitor are considered in this paper. The impact of internal VSC faults when they occur within the grid side converter (GSC) and rotor side converter (RSC) is investigated. Compliance of the voltage profiles of a DFIG with the \\{LVRTs\\} specified in the recent grid codes of the USA, Spain, Mexico, Denmark, Ireland, Germany, Quebec and the UK are examined for the faults studied. The simulation results show that these faults should be considered in designs of protection systems aimed at avoiding any catastrophic failure of the converter switches or wind turbine.

A.F. Abdou; A. Abu-Siada; H.R. Pota

2015-01-01T23:59:59.000Z

480

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

E-Print Network (OSTI)

DFIG Driven Wind Turbine Grid Fault-Tolerance Using High-Order Sliding Mode Control Mohamed (DFIG), control, second-order sliding mode, grid fault-tolerance. Nomenclature WT = Wind Turbine; DFIG increased currents, which may lead to converter failure. Achieving ride-through requirement for DFIG

Boyer, Edmond

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481

Exact Computation of Maximally Dominating Faults and Its Application to -Detection Tests  

E-Print Network (OSTI)

Exact Computation of Maximally Dominating Faults and Its Application to -Detection Tests Ilia, IN 47907, USA Abstract £ -detection test sets for stuck-at faults have been shown to be useful in detecting an important role in controlling the increase in the size of an £ -detection test set as £ is increased

Polian, Ilia

482

nD-RAPID: a multidimensional scalable fault-tolerant optoelectronic  

E-Print Network (OSTI)

nD-RAPID: a multidimensional scalable fault-tolerant optoelectronic interconnection for high of faults. We propose a multidimen- sional optoelectronic architecture, nD-RAPID (reconfigurable, and latency [4­7]. In this paper, we propose a novel optoelectronic architecture nD-RAPID (n Dimen- sional

Louri, Ahmed

483

A Probability Extension of PCA to Detect and Diagnose Sensor Faults in Air Handling Units  

E-Print Network (OSTI)

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...

Li, Z.

2011-01-01T23:59:59.000Z

484

Extractable organic material in fault zones as a tool to1 investigate frictional stress2  

E-Print Network (OSTI)

by measuring modern heat flow in boreholes in the vicinity of the San Andreas37 Fault [Brune et al., 1969 the temperature of a fault immediately after a large earthquake [Kano et al., 2006;44 Tanaka et al., 2001], however, no project to date has succeeded in drilling fast and deep enough45 with sufficient repeated

Polissar, Pratigya J.

485

First-principles calculations of twin-boundary and stacking-fault energies in magnesium  

E-Print Network (OSTI)

First-principles calculations of twin-boundary and stacking-fault energies in magnesium Y. Wang and stacking faults in metal magnesium have been calculated using first-principles supercell approach. Four. Keywords: Magnesium; Interfaces; Twinning; First-principles calculation Magnesium alloys are increasingly

Chen, Long-Qing

486

An on-line fault detection technique based on embedded debug features  

Science Journals Connector (OSTI)

An increasing number of applications require being able to detect possible faults arising during the normal activity of the electronic system: for this reason, on-line fault detection is a hot topic today. This paper proposes a new technique which is ...

M. Grosso; M. Sonza Reorda; M. Portela-Garcia; M. Garcia-Valderas; C. Lopez-Ongil; L. Entrena

2010-07-01T23:59:59.000Z

487

Miocene faulting at plate tectonic velocity in the Himalaya of central Nepal  

E-Print Network (OSTI)

Miocene faulting at plate tectonic velocity in the Himalaya of central Nepal Matthew J. Kohna, Tri-Chandra Campus, Ghantaghar, Kathmandu, Nepal, United States Received 7 April 2004; received (MCT) and affiliated faults in central Nepal. Inferred rates were 1.5F0.9 cm/yr (Langtang Thrust, ~19

488

Modeling and simulation of a reformate supplied PEM fuel cell stack, application to fault detection  

E-Print Network (OSTI)

Modeling and simulation of a reformate supplied PEM fuel cell stack, application to fault detection exchange membrane (PEM) fuel cells are the main type of fuel cell developed for ground vehicle applications tool for thermal characteristic and fault detection of a PEM fuel cell stack. The fuel cell stack model

Paris-Sud XI, Université de

489

System for detecting and limiting electrical ground faults within electrical devices  

DOE Patents (OSTI)

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.

Gaubatz, Donald C. (Cupertino, CA)

1990-01-01T23:59:59.000Z

490

Lossy Electric Transmission Line Soft Fault Diagnosis: an Inverse Scattering Approach  

E-Print Network (OSTI)

1 Lossy Electric Transmission Line Soft Fault Diagnosis: an Inverse Scattering Approach Huaibin transmission lines is studied through the inverse scattering approach. The considered soft faults are modeled as continuous spatial variations of distributed characteristic parameters of transmission lines. The diagnosis

Paris-Sud XI, Université de

491

Hydrogeological aspects of fault zones on various scales in the Roer Valley Rift System  

E-Print Network (OSTI)

at the location of the fault zone. Finally, on a regional scale, hydraulic head patterns around the lignite mining to regional groundwater flow patterns. D 2003 Elsevier Science B.V. All rights reserved. Keywords: Faults B.V. All rights reserved. doi:10.1016/S0375-6742(03)00031-1 * Corresponding author. Fax: +31

Bense, Victor

492

Online Model-based Diagnosis for Multiple, Intermittent and Interaction Faults  

E-Print Network (OSTI)

convert, move and process materials or objects. Examples of such systems are printers, refineries. An interaction fault is present if a set of components operating on the same object, damage the object even though each component alone produces non noticeable damage. Introducing interaction faults is much

de Kleer, Johan

493

Arcing fault identification using combined Gabor Transform-neural network for transmission lines  

Science Journals Connector (OSTI)

Abstract This paper presents an intelligent identification scheme for transient faults in transmission systems using Gabor Transform (GT) and Artificial Neural Network (ANN). The successful discrimination between arcing and permanent faults can be then utilized for realize a reliable operation of autoreclosure systems. The proposed algorithm employs the GT as a signal processing technique and the ANN for pattern recognition and classification processes. The use of GT is motivated by the fact that the Gabor elementary functions have distinctive an optimal localization property in the joint time and frequency domains, which leads to an optimal feature extraction. The extracted GT coefficients are used as the inputs to a three layer feedforward ANN. The generalization capabilities of neural networks together with the GT are expected to discriminate between arcing and permanent fault cases successfully. The fault behavior is simulated by ATP/EMTP where the arc model is realized using universal arc representation. Finally, the possibility of hardware implementation of the proposed scheme is visualized in order to verify its practicality and suitability for real field operation. The results show that combining of GT along with \\{ANNs\\} achieves an excellent performance to discriminate between arcing and permanent faults with eliminating the impacts of fault resistance, fault location and fault inception angle as compared with conventional discriminators.

Tamer A. Kawady; Nagy I. Elkalashy; Ayman E. Ibrahim; Abdel-Maksoud I. Taalab

2014-01-01T23:59:59.000Z

494

A nested invocation suppression mechanism for active replication fault-tolerant CORBA  

E-Print Network (OSTI)

1 A nested invocation suppression mechanism for active replication fault-tolerant CORBA Deron Liang. The redundant nested invocation (RNI) problem arises when servers in a replicated group issues nested a mechanism to perform auto-suppression of redundant nested invocation in an active replication fault

Chen, Sheng-Wei

495

Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems  

E-Print Network (OSTI)

Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems. Introduction Model-based evaluation of the reliability of distributed systems has traditionally required expert- proach to analyze the reliability of fault-tolerant distributed systems. More in particular, we want

Newcastle upon Tyne, University of

496

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

E-Print Network (OSTI)

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

Henderson, Gideon

497

Fault-tolerant Holonomic Quantum Computation in Surface Codes  

E-Print Network (OSTI)

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.

Yi-Cong Zheng; Todd A. Brun

2015-02-04T23:59:59.000Z

498

Fault current limiter and alternating current circuit breaker  

DOE Patents (OSTI)

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.

Boenig, H.J.

1998-03-10T23:59:59.000Z

499

Fault current limiter and alternating current circuit breaker  

SciTech Connect

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.

Boenig, Heinrich J. (Los Alamos, NM)

1998-01-01T23:59:59.000Z

500

Restoration and testing of an HTS fault current controller  

SciTech Connect

A three-phase, 1200 A, 12.5 kV fault current controller using three HTS 4 mH coils, was built by industry and tested in 1999 at the Center Substation of Southern California Edison in Norwalk, CA. During the testing, it appeared that each of the three single-phase units had experienced a voltage breakdown, one externally and two internally. Los Alamos National Laboratory (LANL) was asked by DOE to restore the operation of the fault current controller provided the HTS coils had not been damaged during the initial substation tests. When the internally-failed coil vacuum vessels were opened it became evident that in these two vessels, a flashover had occurred at the high voltage bus section leading to the terminals of the superconducting coil. An investigation into the failure mechanism resulted in six possible causes for the flashover. Based on these causes, the high voltage bus was completely redesigned. Single-phase tests were successfully performed on the modified unit at a 13.7 kV LANL substation. This paper presents the postulated voltage flashover failure mechanisms, the new high voltage bus design which mitigates the failure mechanisms, the sequence of tests used to validate the new design, and finally, the results of variable load and short-circuit tests with the single-phase unit operating on the LANL 13.7 kV substation.

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

2002-01-01T23:59:59.000Z