Sample records for schematic wiring diagram

  1. View southwest of carousel displaying schematic diagrams of electrical system; ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View southwest of carousel displaying schematic diagrams of electrical system; carousel has been rotated 180 degrees to show schematics on opposite side; operators console switchboard #1 is at lower right of photograph - Thirtieth Street Station, Power Director Center, Thirtieth & Market Streets in Amtrak Railroad Station, Philadelphia, Philadelphia County, PA

  2. View southwest of carousel displaying schematic diagrams of electrical system; ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View southwest of carousel displaying schematic diagrams of electrical system; operators console switchboard #1 is at lower right of photograph - Thirtieth Street Station, Power Director Center, Thirtieth & Market Streets in Amtrak Railroad Station, Philadelphia, Philadelphia County, PA

  3. A Procedure for the Format of Schematic Diagrams for Design, Construction, and Maintenance

    Microsoft Academic Search

    Tom B. Smith

    1971-01-01

    Electrical schematic diagrams serve many functions in industry. A continuous process manufacturing plant has unique requirements not always satisfied by existing formats. The varied applications of schematic diagrams are discussed from the stand-point of an industrial user. References to current industry standards are cited and several additional features are explained. A detailed procedure for the format of a schematic is

  4. Telesynergy V3 Wiring Diagram

    Cancer.gov

    Extron 8 port Video/Audio Switch WAVE Camera Telesynergy v3 Wiring Diagram ISDN T1/PRI Module CTRLR 0 Legend: S-Video Audio VGA DVI USB RS-232 Serial Microphone Ethernet Planar C5i AMD Exam Cam Canon Document Camera Olympus BX51 Sony DVD Recorder JVC

  5. TI 101C Sampler Wiring Diagrams TABLE OF CONTENTS

    E-print Network

    Fischer, Emily V.

    ........................................................ 12 Figure 9 IC1 Independent Controller Version 1 Electrical Schematic ........................... 13 Figure 10 IC1L Independent Controller Version 1 with Lock-Out Relay Electrical Schematic.................................................................................................................4 4.1 Satellite Sampling Module Wiring Schematic

  6. AUXILIARY TRACK SCHEMATIC DIAGRAM FOR PIEDMONT, WV (3.2 MILES WEST), ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    AUXILIARY TRACK SCHEMATIC DIAGRAM FOR PIEDMONT, WV (3.2 MILES WEST), MOUNTED AT WEST END OF OPERATOR?S DESK. ROTARY ELECTRICAL SWITCHES CONTROL TURNOUTS AND SIGNALS AT PIEDMONT. - Baltimore & Ohio Railroad, Z Tower, State Route 46, Keyser, Mineral County, WV

  7. Commutation classes of double wiring diagrams

    E-print Network

    Dukes, Patrick

    2010-01-01

    We describe a new method for computing the graph of commutation classes of double wiring diagrams. Using these methods we compute the graph for five strings or less which allows us to confirm a positivity conjecture of Fomin and Zelevinsky when n is less than five .

  8. December 2009 | 31 (a) Energy diagram of CARS. (b) Schematic of instrument. (c) Raman spectra of DNA and RNA

    E-print Network

    Boppart, Stephen

    December 2009 | 31 '09 (a) Energy diagram of CARS. (b) Schematic of instrument. (c) Raman spectra for Coherent Raman Imaging Joseph B. Geddes III, Daniel L. Marks and Stephen A. Boppart One objective of nonlinear mi- croscopy is to image endogenous properties of samples, particularly bio- logical ones

  9. Iron silicides grown by solid phase epitaxy on a Si(111) surface: Schematic phase diagram

    SciTech Connect

    Kataoka, K. [Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192 (Japan); Hattori, K.; Daimon, H. [Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192 (Japan); CREST-JST, Kawaguchi, Saitama 332-0012 (Japan); Miyatake, Y. [UNISOKU Co., Ltd., Hirakata, Osaka 573-0131 (Japan)

    2006-10-15

    We have determined the schematic phase diagram in detail with high reliability for Fe silicides grown by solid phase epitaxy (SPE) on a Si(111)7x7 surface at wide Fe coverage (0.2-56 monolayers) and subsequent annealing temperatures from 300 to 800 deg. C. In the SPE growth, {delta}-7x7, 1x1, bcc-Fe(111)1x1, 2x2, c(8x4), 3D-2x2 ({alpha}-FeSi{sub 2}), {radical}(3)x{radical}(3)-R30 deg., {beta}-FeSi{sub 2}, and fine polycrystalline phases are formed on the Si(111) surface depending on Fe coverage and annealing temperature. We have characterized the surface periodic structures and morphologies of all the above Fe silicide phases using low-energy electron diffraction and scanning tunneling microscopy. Reflection high-energy electron diffraction also has been used to determine three-dimensional structures. Based on the overall view regarding the formations and changes of Fe silicide phases on a Si(111) surface, we discuss the growth mechanisms.

  10. THE OPERAD OF WIRING DIAGRAMS: FORMALIZING A GRAPHICAL LANGUAGE FOR DATABASES,

    E-print Network

    Spivak, David

    represents (whether it be a digital circuit, an agency in the brain, a mathematical relation, etc-AND-PLAY CIRCUITS DAVID I. SPIVAK Abstract. Wiring diagrams, as seen in digital circuits, can be nested hierarchi databases. We give the example of circuit diagrams as a special case. We move on to show how plug

  11. 1. (30 points) (a) (6 points) Use both the atom (ball) electron pair schematic and band diagram to illustrate n-

    E-print Network

    California at San Diego, University of

    connectors to n- and p-side, respectively, please draw the energy band diagram under applied biases of VAB the energy band diagram under applied biases of VAB = -10V, 0V, and +10V at 0K, 300K, and 600K (total 9

  12. Systematic study of surface magnetism in Si(111)-Fe system grown by solid phase epitaxy: In situ schematic magnetic phase diagram of Si(111)-Fe

    NASA Astrophysics Data System (ADS)

    Hattori, Azusa N.; Hattori, Ken; Kataoka, Keita; Takematsu, Emi; Ishii, Akira; Komori, Fumio; Daimon, Hiroshi

    2014-08-01

    We have studied in situ structures and magnetic properties for several iron silicides grown on Si(111)7×7 clean surfaces by the solid phase epitaxy (SPE) method: deposition of Fe at 40 K and subsequently annealing, and summarized almost all silicide phases depending on the deposition thickness and the annealing temperature as a “schematic magnetic phase diagram”. In the SPE growth, bcc-Fe(111)1×1, c-FeSi(111)1×1, 2×2, and c(4×8), ?-FeSi2(112)2×2, ?-FeSi(111)?3 ×? 3-R30°, ?-FeSi2(101)/(110) and polycrystalline phases are formed on Si(111)7×7 surfaces depending on Fe coverage (0.15-10.0 nm) and annealing temperature (470-1070 K). The structures and magnetic properties of all the above Fe silicide phases have been characterized by using in situ reflection high-energy electron diffraction, scanning tunneling microscopy, and surface magneto-optical Kerr effect. Bulk-unstable c-FeSi phases showed ferromagnetic property at 40 K and this ferromagnetism remained even after air exposure. For the c-FeSi(111)/Si(111) system, the large spin polarization was proposed at the Fe interface atoms in the B5-type interface structure between the c-FeSi(111) ultra-thin film and the Si(111) substrate by first-principle calculations.

  13. Fluctuation diagrams for hot-wire anemometry in subsonic compressible flows

    NASA Technical Reports Server (NTRS)

    Stainback, P. C.; Nagabushana, K. A.

    1991-01-01

    The concept of using 'fluctuation diagrams' for describing basic fluctuations in compressible flows was reported by Kovasznay in the 1950's. The application of this technique, for the most part, was restricted to supersonic flows. Recently, Zinovev and Lebiga published reports where they considered the fluctuation diagrams in subsonic compressible flows. For the above studies, the velocity and density sensitivities of the heated wires were equal. However, there are considerable data, much taken in the 1950's, which indicate that under some conditions the velocity and density sensitivities are not equal in subsonic compressible flows. Therefore, possible fluctuation diagrams are described for the cases where the velocity and density sensitivities are equal and the more general cases where they are unequal.

  14. MIDAS, prototype Multivariate Interactive Digital Analysis System, phase 1. Volume 3: Wiring diagrams

    NASA Technical Reports Server (NTRS)

    Kriegler, F. J.; Christenson, D.; Gordon, M.; Kistler, R.; Lampert, S.; Marshall, R.; Mclaughlin, R.

    1974-01-01

    The Midas System is a third-generation, fast, multispectral recognition system able to keep pace with the large quantity and high rates of data acquisition from present and projected sensors. A principal objective of the MIDAS Program is to provide a system well interfaced with the human operator and thus to obtain large overall reductions in turn-around time and significant gains in throughput. The hardware and software generated in Phase I of the overall program are described. The system contains a mini-computer to control the various high-speed processing elements in the data path and a classifier which implements an all-digital prototype multivariate-Gaussian maximum likelihood decision algorithm operating at 2 x 100,000 pixels/sec. Sufficient hardware was developed to perform signature extraction from computer-compatible tapes, compute classifier coefficients, control the classifier operation, and diagnose operation. The MIDAS construction and wiring diagrams are given.

  15. Actuator Response of Improved Two-Way Memory TiNi Wires Evaluated by Weight Fraction Diagrams

    NASA Astrophysics Data System (ADS)

    Urbina, C.; De la Flor, S.; Gispert-Guirado, F.; Ferrando, F.

    2014-05-01

    This paper experimentally studies the improvement in the actuator response of TiNi shape memory wires brought about by thermal treatments. Heat-treated TiNi wires were thermally cycled at zero stress before being trained by constant stress to develop the two-way shape memory effect. Subsequently, the work output of these two-way memory TiNi shape memory alloys are measured during repeated thermomechanical cycling under various levels of constant stress. Changes in the phase transformation behavior in two-way memory and thermomechanically cycled TiNi shape memory alloy wires are quantified by x-ray diffraction as a function of temperature. The weight fraction diagrams of TiNi wires thermally cycled at zero stress before they were trained suggests that during constant stress training they develop a lower quantity of R-phase than samples that have not been thermally cycled at zero stress before being trained. This gives thermally cycled TiNi samples higher levels of transformation strain and work output during thermomechanical cycling than samples that have not been thermally cycled before training. These results suggest that for the best material performance—that is, significant transformation strain and, consequently, substantial work output—the TiNi wire should be thermally cycled at zero stress before training.

  16. Foundational model of structural connectivity in the nervous system with a schema for wiring diagrams, connectome, and basic plan architecture

    PubMed Central

    Swanson, Larry W.; Bota, Mihail

    2010-01-01

    The nervous system is a biological computer integrating the body's reflex and voluntary environmental interactions (behavior) with a relatively constant internal state (homeostasis)—promoting survival of the individual and species. The wiring diagram of the nervous system's structural connectivity provides an obligatory foundational model for understanding functional localization at molecular, cellular, systems, and behavioral organization levels. This paper provides a high-level, downwardly extendible, conceptual framework—like a compass and map—for describing and exploring in neuroinformatics systems (such as our Brain Architecture Knowledge Management System) the structural architecture of the nervous system's basic wiring diagram. For this, the Foundational Model of Connectivity's universe of discourse is the structural architecture of nervous system connectivity in all animals at all resolutions, and the model includes two key elements—a set of basic principles and an internally consistent set of concepts (defined vocabulary of standard terms)—arranged in an explicitly defined schema (set of relationships between concepts) allowing automatic inferences. In addition, rules and procedures for creating and modifying the foundational model are considered. Controlled vocabularies with broad community support typically are managed by standing committees of experts that create and refine boundary conditions, and a set of rules that are available on the Web. PMID:21078980

  17. Napkin schematics studio

    Microsoft Academic Search

    Nathan Seidle

    2011-01-01

    In the Napkin Schematics Studio, tangible interaction designers who have basic experience with microcontrollers (for example, Arduino) will brainstorm about project design and development with the guidance of an experienced electronics designer. Then, working in small groups, the participants will build working prototypes of selected designs from the brainstorming session.

  18. Band-edge diagrams for strained III-V semiconductor quantum wells, wires, and dots

    NASA Astrophysics Data System (ADS)

    Pryor, C. E.; Pistol, M.-E.

    2005-11-01

    We have calculated band-edge energies for most combinations of zinc blende AlN, GaN, InN, GaP, GaAs, InP, InAs, GaSb, and InSb in which one material is strained to the other. Calculations were done for three different geometries (quantum wells, wires, and dots) and mean effective masses were computed in order to estimate confinement energies. For quantum wells, we have also calculated band-edges for ternary alloys. Energy gaps, including confinement, may be easily and accurately estimated using band energies and a simple effective mass approximation, yielding excellent agreement with experimental results. By calculating all material combinations we have identified interesting material combinations, such as artificial donors, that have not been experimentally realized. The calculations were perfomed using strain-dependent k•p theory and provide a comprehensive overview of band structures for strained heterostructures.

  19. A Functional Schematic Interpreter: an environment for Model Design

    Microsoft Academic Search

    T. R. Addis; J. J. Townsend Addis

    1998-01-01

    There are two major reasons for the value of a functional schematic interpreter as a new programming language for constructing models. These reasons are the capacity of a functional language to express knowledge that has a formal representation on a computer and the rich informal semantics that can be attached to a set of diagrams (a schema). It is this

  20. Language, Perception, and the Schematic Representation of Spatial Relations

    ERIC Educational Resources Information Center

    Amorapanth, Prin; Kranjec, Alexander; Bromberger, Bianca; Lehet, Matthew; Widick, Page; Woods, Adam J.; Kimberg, Daniel Y.; Chatterjee, Anjan

    2012-01-01

    Schemas are abstract nonverbal representations that parsimoniously depict spatial relations. Despite their ubiquitous use in maps and diagrams, little is known about their neural instantiation. We sought to determine the extent to which schematic representations are neurally distinguished from language on the one hand, and from rich perceptual…

  1. Schematic displays for the Space Shuttle Orbiter multifunction cathode-ray-tube display system

    NASA Technical Reports Server (NTRS)

    Weiss, W.

    1979-01-01

    A standardized procedure for developing cathode ray tube displayed schematic diagrams. The displaying of Spacelab information on the space shuttle orbiter multifunction cathode ray tube display system is used to illustrate this procedure. Schematic displays with the equivalent tabular displays are compared.

  2. A Phase Diagram for Morphology and Properties of Low Temperature Deposited Polycrystalline Silicon Grown by Hot-wire Chemical Vapor

    E-print Network

    Atwater, Harry

    A Phase Diagram for Morphology and Properties of Low Temperature Deposited Polycrystalline Silicon 91125, U.S.A ABSTRACT The fabrication of low temperature polycrystalline silicon with internal surface polycrystalline silicon photovoltaics. To achieve high lifetimes, large grains with passivated low- angle grain

  3. Radial Distribution Function (RDF) schematic

    NSDL National Science Digital Library

    Iacovella, Christopher R.

    2006-09-28

    Schematic of the Radial Distribution Function (RDF). The radial distribution function, also known as RDF, g(r), or the pair correlation function, is a measure to determine the correlation between particles within a system. Specifically, it is a measure of, on average, the probability of finding a particle at a distance of r away from a given reference particle, relative to that for an ideal gas. The general algorithm involves determining how many particles are within a distance of r and r+dr away from a particle. This general theme is depicted in the schematic, where the red particle is our reference particle, and blue particles are those which are within the circular shell, dotted in red.

  4. GRASP: a grammar-based schematic parser

    Microsoft Academic Search

    Cyrus Bamji; Jonathan Allen

    1989-01-01

    The process of verifying that a circuit's schematic netlist obeys a particular design methodology is formalized. Circuit correctness is tied to a rigorous set of context free grammar composition rules. These rules define how a small set of module symbols may be combined for circuits adhering to the design methodology. Schematic netlists are represented as graphs, and composition rules are

  5. TELESYNERGY v3 Wiring Diagram

    Cancer.gov

    Audio In Mic 1 Mic 2 M ic 3 1 2 3 4 5-AU X 6-VCR 1 2-AU X 3-VCR Aud io Ou t Video In 1 2 3 4 1 2 3 4 Vide o Out V GA I n VGA O ut 1 2 3 4 ISDN BRI N et Ethe rnet ISDN BRI 5 6 E1/ T1 1 2 Data 1 D ata 2 50-60Hz REMOT E 100-240 ~ 1.3A L R + _ + _ OUT

  6. Buncher Schematics & CAD Model based on MICE

    E-print Network

    McDonald, Kirk

    , gradient 15 MV/m. · Cavity length 0.5m, Coil length 0.15m Two Cells Be coated #12;Cooling Section CAD Model · 100 normal conducting RF cavities and 100 superconducting coils · Cavities RF frequency 201.25 MHz. Coupling coil cross section as schematic .15m x .15m Bellows required between each cavity / coil module

  7. Platform-independent method for computer aided schematic drawings

    DOEpatents

    Vell, Jeffrey L. (Slingerlands, NY); Siganporia, Darius M. (Clifton Park, NY); Levy, Arthur J. (Fort Lauderdale, FL)

    2012-02-14

    A CAD/CAM method is disclosed for a computer system to capture and interchange schematic drawing and associated design information. The schematic drawing and design information are stored in an extensible, platform-independent format.

  8. Rossby waves and the jet Schematic from Vallis

    E-print Network

    Frierson, Dargan

    Rossby waves and the jet Schematic from Vallis: #12;Rossby waves and the jet Schematic from latitude #12;Rossby Wave Absorption in a Barotropic Model From Held and Phillips (1987): A Rossby wave speed c Zonal wind U at 200 hPa #12;Schematic of Wave Absorption Wave propagates until critical

  9. Wire Maze

    NSDL National Science Digital Library

    K-12 Outreach Office,

    Students gain a basic understanding of electrical circuits. They build wire circuits and pass paperclips through the mazes, trying not to touch the wires. Touching a wire with a paperclip causes the circuit to close, which activates an indicator.

  10. Wire Weight

    USGS Multimedia Gallery

    Wire weight is lowered to water surface to measure stage at a site. Levels are made to the wire weights elevation from known benchmarks to ensure correct readings. This wire weight is located along the Missouri River in Bismarck, ND....

  11. Browsing schematics: Query-filtered graphs with context nodes

    NASA Technical Reports Server (NTRS)

    Ciccarelli, Eugene C.; Nardi, Bonnie A.

    1988-01-01

    The early results of a research project to create tools for building interfaces to intelligent systems on the NASA Space Station are reported. One such tool is the Schematic Browser which helps users engaged in engineering problem solving find and select schematics from among a large set. Users query for schematics with certain components, and the Schematic Browser presents a graph whose nodes represent the schematics with those components. The query greatly reduces the number of choices presented to the user, filtering the graph to a manageable size. Users can reformulate and refine the query serially until they locate the schematics of interest. To help users maintain orientation as they navigate a large body of data, the graph also includes nodes that are not matches but provide global and local context for the matching nodes. Context nodes include landmarks, ancestors, siblings, children and previous matches.

  12. A GIS Tool for simulating Nitrogen transport along schematic Network

    NASA Astrophysics Data System (ADS)

    Tavakoly, A. A.; Maidment, D. R.; Yang, Z.; Whiteaker, T.; David, C. H.; Johnson, S.

    2012-12-01

    An automated method called the Arc Hydro Schematic Processor has been developed for water process computation on schematic networks formed from the NHDPlus and similar GIS river networks. The sechemtaic network represents the hydrologic feature on the ground and is a network of links and nodes. SchemaNodes show hydrologic features, such as catchments or stream junctions. SchemaLinks prescripe the connections between nodes. The schematic processor uses the schematic network to pass informatin through a watershed and move water or pollutants dwonstream. In addition, the schematic processor has a capability to use additional programming applied to the passed and/or received values and manipulating data trough network. This paper describes how the schemtic processor can be used to simulate nitrogen transport and transformation on river networks. For this purpose the nitrogen loads is estimated on the NHDPlus river network using the Schematic Processor coupled with the river routing model for the Texas Gulf Coast Hydrologic Region.

  13. Basic Wiring.

    ERIC Educational Resources Information Center

    Kaltwasser, Stan; And Others

    This module is the first in a series of three wiring publications; it serves as the foundation for students enrolled in a wiring program. It is a prerequisite to either "Residential Wiring" or "Commercial and Industrial Wiring." The module contains 16 instructional units that cover the following topics: occupational introduction; general safety;…

  14. The Effect of Conceptual Diagrams on Aviation Mechanics' Technical Systems Understanding.

    ERIC Educational Resources Information Center

    Satchwell, Richard E.; Johnson, Scott D.

    A quasi-experimental study explored the effect of functional flow diagrams on technical system understanding. An individualized field training package which contained schematic diagrams that illustrated an aircraft's electrical system was complimented with functional flow diagrams. In a 4-week treatment, a control group of 10 students enrolled in…

  15. Wire Maze

    NSDL National Science Digital Library

    Worcester Polytechnic Institute

    2013-01-01

    Learners create an electrical-circuit maze out of wire, then try to pass a paperclip through the maze without touching the wire. If the paper clip touches the wire, it closes the circuit, causing a light to come on or a buzzer to sound. This activity requires a basic understanding of how to build an electrical circuit.

  16. Bering Strait Moorings to be deployed in 2008 Schematic of Bering Strait region

    E-print Network

    Bering Strait Moorings to be deployed in 2008 Schematic of Bering Strait region showing topography locations Detail of Bering Strait Region, schematically marking: - major currents (SCC = Siberian Coastal

  17. Lighting the Way: Electrical Circuits and Lamp Wiring

    NSDL National Science Digital Library

    This self-paced unit for students in grades 6-9 provides an opportunity to explore basic electrical circuits and demonstrate the new knowledge by wiring a lamp, explaining the components of the lamp that are important for the flow of electricity, and completing a schematic of the lamp circuitry.

  18. Venn Diagrams

    NSDL National Science Digital Library

    2011-05-24

    In this activity, students are given a Venn diagram with certain rules and an element. They must then determine where in the Venn diagram the element belongs. This activity allows students to practice placing elements in Venn diagrams as well as reviewing mathematical terms associated with the different rules. This activity includes supplemental materials, including background information about the topics covered, a description of how to use the application, and exploration questions for use with the java applet.

  19. Carroll Diagrams

    NSDL National Science Digital Library

    NRICH team

    2012-01-01

    In this number sorting activity students must use a Carroll Diagram to determine which two categories each number fits into. This activity can be completed in pairs or groups on printable versions or it can be completed as a whole class using the interactive white board (IWB). Included with this resource are printable versions of the Carroll Diagrams, guiding questions, extension and support suggestions, and a link to more challenging "More Carroll Diagrams".

  20. Schematic Driven Layout for Analog and MixedSignal Design Page 1 of 6 Schematic Driven Layout Using the MOSIS Design Kit for

    E-print Network

    Stan, Mircea R.

    Schematic Driven Layout for Analog and Mixed­Signal Design Page 1 of 6 Schematic Driven Layout of Virginia ­ Department of Electrical Engineering, Charlottesville, VA 29903 1. currently with Maxim increases the probability of human error. Schematic­driven lay­ out (SDL) has proven to be a powerful tool

  1. Wire Wise.

    ERIC Educational Resources Information Center

    Swanquist, Barry

    1998-01-01

    Discusses how today's technology is encouraging schools to invest in furnishings that are adaptable to computer use and telecommunications access. Explores issues concerning modularity, wiring management, ergonomics, durability, price, and aesthetics. (GR)

  2. Overview of wire bonding using copper wire or insulated wire

    Microsoft Academic Search

    Z. W. Zhong

    2011-01-01

    Wire bonding using copper or insulated wire leads to many advantages and new challenges. Research is intensively performed worldwide, leading to many new findings and solutions. This article reviews recent advances in wire bonding using copper wire or insulated wire for advanced microelectronics packaging. Journal articles, conference articles and patents published or issued recently are reviewed. The benefits and problems\\/challenges

  3. Stretching Wires

    NSDL National Science Digital Library

    University of Illinois Urbana-Champaign

    2013-01-04

    In this activity, learners determine the elastic and plastic properties of different types of metal wires. Learners discover that wires of the same gauge, but made of different metals, typically support different loads (masses) before going through the elastic to plastic transition. Learners also learn the difference between elastic deformation, which is recoverable after the load is removed, and plastic deformation, which is not recoverable. Note: one way to save time on this lab is to have different groups test different metals.

  4. A Transformation Algorithm of Ladder Diagram into Instruction List Based on AOV Digraph and Binary Tree

    Microsoft Academic Search

    Ge Fen; Wu Ning

    2006-01-01

    Ladder diagram (LD) and instruction list (IL) have been widely used in industries as programming languages for PLC (programmable logic controller). The LD is similar to the electrical schematic diagram, and can represent control logic explicitly. However, LD programs can not be executed directly by PLC. On the other hand the IL which is similar to the assemble language can

  5. Visual Navigation with Schematic Maps Steffen Bogen1

    E-print Network

    Brandes, Ulrik

    Visual Navigation with Schematic Maps Steffen Bogen1 , Ulrik Brandes2 , and Hendrik Ziezold2 1 Art approach blends art history and computer science, and is based on a systematic, operational perspective, visual, tactile, or even multi-modal form. The most common tool to explore navigational opportunities

  6. The Schematic Structure of Computer Science Research Articles

    Microsoft Academic Search

    Santiago Posteguillo

    1999-01-01

    This paper presents a linguistic description of the schematic organisation of research articles in the field of computer science. Forty articles from three different academic journals in computing research have been analysed; the results indicate that the IMRD (introduction-methods-results-discussion) pattern cannot be applied to research articles in computer science systematically. Introductory and concluding sections, however, are used in more instances.

  7. VLSI Lab Tutorial 1 Cadence Virtuoso Schematic Composer Introduction

    E-print Network

    Mahmoodi, Hamid

    fundamental concepts of creating CMOS schematics, symbols and layouts, simulating circuits, performing layout verification and parasitic extraction from layout using cadence. Please refer to the online documentation information can be found under the Custom IC and Deep Submicron Design category. Under Design entry

  8. Cloud Diagram

    NSDL National Science Digital Library

    This interactive diagram shows the various types of clouds and the relative altitudes at which they occur. Users can roll their mice over each cloud type and see a photo and a brief written description of each type.

  9. Knowledge-Based Schematics Drafting: Aesthetic Configuration as a Design Task

    E-print Network

    Valdes-Perez, Raul E.

    Depicting an electrical circuit by a schematic is a tedious task that is a good candidate for automation. Programs that draft schematics with the usual algorithmic approach do not fully exploit knowledge of circuit function, ...

  10. Venn diagrams

    NSDL National Science Digital Library

    National Science Digital Library (NSDL) Middle School Portal Staff

    2008-03-10

    These online resources offer varied opportunities to work with Venn diagrams, one of many tools used in logic and reasoning. Their use is especially helpful in learning foundational notions of definition and set theory. One of the five Process Standards promoted by NCTM, Reasoning and Proof requires middle school students to sharpen such skills as they learn to develop mathematical argument.

  11. Phase Diagrams

    NSDL National Science Digital Library

    Dexter Perkins

    This handout and problem set is a stand alone tutorial that introduces students to the basics of phase diagrams and the phase rule. It is a rather lengthy exercise, suitable as a homework assignment. It can replace lectures and yields superior learning.

  12. Mechanical verification of a schematic Byzantine clock synchronization algorithm

    NASA Technical Reports Server (NTRS)

    Shankar, Natarajan

    1991-01-01

    Schneider generalizes a number of protocols for Byzantine fault tolerant clock synchronization and presents a uniform proof for their correctness. The authors present a machine checked proof of this schematic protocol that revises some of the details in Schneider's original analysis. The verification was carried out with the EHDM system developed at the SRI Computer Science Laboratory. The mechanically checked proofs include the verification that the egocentric mean function used in Lamport and Melliar-Smith's Interactive Convergence Algorithm satisfies the requirements of Schneider's protocol.

  13. Phase Diagram

    NASA Astrophysics Data System (ADS)

    Walker, Matthew S.; Fruehan, Richard J.

    2014-08-01

    The thermodynamics of several aspects of the carbothermic reduction of alumina have been examined. In Part I, the results of measuring the evolved CO from the reaction between Al2O3 and C mixtures were used to determine the temperature and carbon contents for carbide formation at alumina saturation and at carbide saturation in the Al2O3-Al4C3 system. In this part of the paper, results are presented for a thermogravimetric study of the reactions of Al2O3 with carbon, as well as those for the determination of the Al2O3 liquidus line and the Al2O3-Al4O4C eutectic in the Al2O3-Al4C3 phase diagram. The critical temperature for Al2O3 and C to react, producing gas at 1 atm., was in agreement with that predicted from thermodynamics and measured in Part I of this paper. However, the Al2O3 liquidus appeared to be steeper and the eutectic temperature lower than the predicted phase diagram.

  14. Venn Diagrams

    NSDL National Science Digital Library

    Jiminez, Alfredo

    Unions, intersections, and differences: This can all be quite confusing to students trying to enter the potentially tricky world of Venn Diagrams. Fortunately, Alfredo Jiminez of Pennsylvania State University, Hazleton has created this handy Flash-enabled teaching application designed to provide students with an engaging way to learn about this subject. The project is party of the Digital Classroom Resources at the MAA Mathematical Sciences Digital Library, and visitors will find this particular learning activity quite easy to use. The interactive tool contains seven sections, including those dealing with the principles of union and intersection, distributive properties, and De Morgan's laws. Within each section, visitors can try their hand with a series of short questions and then take advantage of some review materials and, of course, a few basic tests.

  15. Facial features in perceived intensity of schematic facial expressions.

    PubMed

    Hasegawa, Hisa; Unuma, Hideyuki

    2010-02-01

    Facial expressions may be perceived continuously or categorically, i.e., perception of facial expressions may be explained by feature-based models or holistic models. A linear additive model is proposed, with weightings for facial features to reflect configural spatial relationships or distances of features from each other. Predictions from the model regarding the perception of affect intensities (e.g., of anger and sadness) were tested using schematic faces, with three facial features, eyebrows, eyes, and mouth as predictors. Model predictions, based on multiple regression analyses, corresponded well with rating judgments of anger and sadness in three experiments. The results suggest not only the limit of feature-configural models of facial expression perception but the feature-selective configuration of facial features and continuous perception of facial expressions. Findings also indicate that the salience or weight of each feature varies with the emotion perceived by observers. PMID:20391879

  16. REVERSE FISHBONE DIAGRAM: A TOOL IN AID OF DESIGN FOR PRODUCT RETIREMENT

    Microsoft Academic Search

    Kosuke Ishii; Burton Lee

    1996-01-01

    This paper describes a schematic representation of product retirement specification that aids in design for recycling and reuse. In the past decade, graphical representation of assembly process called the assembly fishbone diagram, has effectively assisted engineers to conduct design for assembly (DFA) and process failure modes and effects analysis (FMEA). On the other hand, environmentally conscious manufacturing requires engineers to

  17. Free Body Diagrams

    NSDL National Science Digital Library

    This website from the University of Guelph's physics department offers a tutorial on free body diagrams. The tutorial includes an explanation of what free body diagrams are, example problems, a self-test, and a free body diagram java applet.

  18. A Comparison of Schematic Processes in Memory for a Television, Text, and Radio Story.

    ERIC Educational Resources Information Center

    Lehrer, Ariella; Pezdek, Kathy

    A study examined the nature of the schematic processes for a story presented in television, text, and radio form and for a story presented to above average and average readers. The story was parsed according to J. M. Mandler and N. S. Johnson's story grammar. Schematic processing was inferred from the pattern of node memorability for the different…

  19. Schematic characterization of human health impact of toxic chemicals for sustainable design and manufacturing

    Microsoft Academic Search

    Chris Y. Yuan; David Dornfeld

    2009-01-01

    A schematic method to characterize the human health impact of toxic chemicals is presented. This schematic method uses a streamlined three-tiered hierarchy process which includes intake, toxicity and persistence of a chemical release for its impact characterization. The human health impact of a chemical is represented by its position in a two-dimensional characterization plot, which enables the benchmarking of chemicals

  20. Xilinx Schematic Simulation Procedures 1. Double-click on the Xilinx Foundation Project Manager icon.

    E-print Network

    Fonoberov, Vladimir

    window. On the upper right-hand pane, you can find a box - Design Entry. Click on the rightmost icon Manager icon. 2. You will get the Getting Started window. Click on Create a New Project and then click OK which has the shape of an AND gate (icon for the schematic editor). You now see the schematic editor

  1. From Activity Diagrams to Class Diagrams

    Microsoft Academic Search

    Joao Paulo Barros; Luis Gomes

    2000-01-01

    A translation from activity diagrams to class diagrams, with executable code, is presented. The translation is amenable to b e made with o r without automating tools. An illustrative a pplication example is also b riefly p resented: Activity diagrams are used in the modelling and implementation of graphical user interfaces, more precisely in the c ontroller part of the

  2. Computer-aided design and fabrication of wire-wrap (trademark) type circuit boards: A new symbolism and its implementation

    Microsoft Academic Search

    B. Montminy; R. Carbonneau; A. Laflamme; M. Lessard; A. Blanchard

    1982-01-01

    We define here an encoding symbolism that permits, with a minimum of statements, a thorough description of the numerous interconnections of complex electronic circuitry. This symbolism has been integrated at the Defence Research Establishment Valcartier in a computer-aided method that considerably eases the passage between an engineering electronic schematic and the related interconnection matrix required for Wire-Wrap (Trademark) hardware. Electronics

  3. Wire Test Grip Fixture

    NASA Technical Reports Server (NTRS)

    Burke, Christopher S.

    2011-01-01

    Wire-testing issues, such as the gripping strains imposed on the wire, play a critical role in obtaining clean data. In a standard test frame fitted with flat wedge grips, the gripping action alone creates stresses on the wire specimen that cause the wire to fail at the grip location. A new test frame, which is outfitted with a vacuum chamber, negated the use of any conventional commercially available wire test fixtures, as only 7 in. (17.8 cm) existed between the grip faces. An innovative grip fixture was designed to test thin gauge wire for a variety of applications in an existing Instron test frame outfitted with a vacuum chamber.

  4. About the Work of Art Unlimited Possibilities celebrates Iowa State's future as a premier land-

    E-print Network

    Mayfield, John

    in celestial images as well as images of more earthy nature: bits of schematics from electrical diagrams. The female student at the top is drawing on a large scale computer screen filled with an electrical wiring schematic. She is wor

  5. Wire harness twisting aid

    NASA Technical Reports Server (NTRS)

    Casey, E. J.; Commadore, C. C.; Ingles, M. E.

    1980-01-01

    Long wire bundles twist into uniform spiral harnesses with help of simple apparatus. Wires pass through spacers and through hand-held tool with hole for each wire. Ends are attached to low speed bench motor. As motor turns, operator moves hand tool away forming smooth twists in wires between motor and tool. Technique produces harnesses that generate less radio-frequency interference than do irregularly twisted cables.

  6. The future of wires

    Microsoft Academic Search

    R. Ho; K. W. Mai; M. A. Horowitz

    1991-01-01

    Concern about the performance of wires in scaled technologies has led to research exploring other communication methods. This paper examines wire and gate delays as technologies migrate from 0.18-m to 0.035-m feature sizes to better understand the magni-tude of the wiring problem. Wires that shorten in length as technolo-gies scale have delays that either track gate delays or grow slowly

  7. Laser Wire Stripper

    NASA Technical Reports Server (NTRS)

    1983-01-01

    NASA-developed space shuttle technology is used in a laser wire stripper designed by Raytheon Company. Laser beams cut through insulation on a wire without damaging conductive metal, because laser radiation that melts plastic insulation is reflected by the metal. The laser process is fast, clean, precise and repeatable. It eliminates quality control problems and the expense of rejected wiring.

  8. Quantum wire junctions breaking time-reversal invariance

    NASA Astrophysics Data System (ADS)

    Bellazzini, Brando; Mintchev, Mihail; Sorba, Paul

    2009-12-01

    We explore the possibility to break time-reversal invariance at the junction of quantum wires. The universal features in the bulk of the wires are described by the anyon Luttinger liquid. A simple necessary and sufficient condition for the breaking of time-reversal invariance is formulated in terms of the scattering matrix at the junction. The phase diagram of a junction with generic number of wires is investigated in this framework. We give an explicit classification of those critical points, which can be reached by bosonization and study the interplay between their stability and symmetry content.

  9. A Schematic Method for Sustainable Material Selection of Toxic Chemicals in Design and Manufacturing

    E-print Network

    Yuan, Chris Yingchun; David Dornfeld

    2010-01-01

    products in both design and manufacturing processes. In this paper, a schematic methodMethod for Sustainable Material Selection of Toxic Chemicals in Design and Manufacturing Toxic chemicals used in product

  10. Policy capturing versus a schematic interpretation on rater reaction to applicant resumes 

    E-print Network

    Cardenas, Terese Yolande

    1985-01-01

    similar finding was reported by Fiske & Kinder (1978). These researcherS found that subjects who had been provided schematic lead-ins to accounts of political turmoil in a foreign country were more confident in their predictions when compared...

  11. Native American Center -UM Schematic Landscape Design Plan 4-3-08

    E-print Network

    Vonessen, Nikolaus

    Native American Center - UM Schematic Landscape Design Plan 4-3-08 Planting Ring - group species of landscape development on the east portion of the site will help make caring for the plantings simpler

  12. Wire-Free Tactile Sensing Element Based on Optical Connection *Kouichi Yamada, **Kenji Goto, *Yoshiki Nakajima, *Nobuyoshi Koshida,

    E-print Network

    Shinoda, Hiroyuki

    interval in a soft artificial robot finger. The transparent robot skin allows optical connection between the sensor chip and the optical transmitter/receiver located inside the finger. Each sensor chip operates detector Wireless sensing chip Nail Power supply 2mm Fig. 1: Schematic diagram of a sensor skin using

  13. The Line Sequence Diagram

    Microsoft Academic Search

    Calvin R. Srock

    1966-01-01

    This paper describes the symbols and techniques used to construct and apply a line sequence diagram. A line sequence diagram, as the name implies, describes the sequence of operations for an electrical control circuit.

  14. AFM Diagram Quiz

    NSDL National Science Digital Library

    Dexter Perkins

    This exercise should be used after you think students know what AFM diagrams are and how they work. This is sort of a quiz - to see if they can properly interpret the diagrams. There is no point moving on to real projects that involve AFM diagrams if the students don't understand the basics.

  15. Lingual straight wire method.

    PubMed

    Takemoto, Kyoto; Scuzzo, Giuseppe; Lombardo, L U C A; Takemoto, Y U I

    2009-12-01

    The mushroom arch-wire is mainly used in lingual orthodontic treatment but the complicated wire bending it requires affects both the treatment results and the time spent at the chair. The author proposes a new lingual straight wire method (LSW) in order to facilitate arch coordination and simplify the mechanics. The attention paid to the set-up model and bracket positioning and bonding plus the use of the new LSW method will also improve patient comfort. PMID:20303920

  16. Sintered wire annode

    DOEpatents

    Falce, Louis R. (Surprise, AZ); Ives, R. Lawrence (Saratoga, CA)

    2007-12-25

    A plurality of high atomic number wires are sintered together to form a porous rod that is parted into porous disks which will be used as x-ray targets. A thermally conductive material is introduced into the pores of the rod, and when a stream of electrons impinges on the sintered wire target and generates x-rays, the heat generated by the impinging x-rays is removed by the thermally conductive material interspersed in the pores of the wires.

  17. 1998 wire development workshop proceedings

    SciTech Connect

    NONE

    1998-04-01

    This report consists of vugraphs of the presentations at the conference. The conference was divided into the following sessions: (1) First Generation Wire Development: Status and Issues; (2) First Generation Wire in Pre-Commercial Prototypes; (3) Second Generation Wire Development: Private Sector Progress and Issues; (4) Second Generation Wire Development: Federal Laboratories; and (5) Fundamental Research Issues for HTS Wire Development.

  18. xVis: a web server for the schematic visualization and interpretation of crosslink-derived spatial restraints

    PubMed Central

    Grimm, Maximilian; Zimniak, Tomasz; Kahraman, Abdullah; Herzog, Franz

    2015-01-01

    The identification of crosslinks by mass spectrometry has recently been established as an integral part of the hybrid structural analysis of protein complexes and networks. The crosslinking analysis determines distance restraints between two covalently linked amino acids which are typically summarized in a table format that precludes the immediate and comprehensive interpretation of the topological data. xVis displays crosslinks in clear schematic representations in form of a circular, bar or network diagram. The interactive graphs indicate the linkage sites and identification scores, depict the spatial proximity of structurally and functionally annotated protein regions and the evolutionary conservation of amino acids and facilitate clustering of proteins into subcomplexes according to the crosslink density. Furthermore, xVis offers two options for the qualitative assessment of the crosslink identifications by filtering crosslinks according to identification scores or false discovery rates and by displaying the corresponding fragment ion spectrum of each crosslink for the manual validation of the mass spectrometric data. Our web server provides an easy-to-use tool for the fast topological and functional interpretation of distance information on protein complex architectures and for the evaluation of crosslink fragment ion spectra. xVis is available under a Creative Commons Attribution-ShareAlike 4.0 International license at http://xvis.genzentrum.lmu.de/. PMID:25956653

  19. xVis: a web server for the schematic visualization and interpretation of crosslink-derived spatial restraints.

    PubMed

    Grimm, Maximilian; Zimniak, Tomasz; Kahraman, Abdullah; Herzog, Franz

    2015-07-01

    The identification of crosslinks by mass spectrometry has recently been established as an integral part of the hybrid structural analysis of protein complexes and networks. The crosslinking analysis determines distance restraints between two covalently linked amino acids which are typically summarized in a table format that precludes the immediate and comprehensive interpretation of the topological data. xVis displays crosslinks in clear schematic representations in form of a circular, bar or network diagram. The interactive graphs indicate the linkage sites and identification scores, depict the spatial proximity of structurally and functionally annotated protein regions and the evolutionary conservation of amino acids and facilitate clustering of proteins into subcomplexes according to the crosslink density. Furthermore, xVis offers two options for the qualitative assessment of the crosslink identifications by filtering crosslinks according to identification scores or false discovery rates and by displaying the corresponding fragment ion spectrum of each crosslink for the manual validation of the mass spectrometric data. Our web server provides an easy-to-use tool for the fast topological and functional interpretation of distance information on protein complex architectures and for the evaluation of crosslink fragment ion spectra. xVis is available under a Creative Commons Attribution-ShareAlike 4.0 International license at http://xvis.genzentrum.lmu.de/. PMID:25956653

  20. Wire Weight with Housing

    USGS Multimedia Gallery

    Wire weight is lowered to water surface to measure stage at a site. Levels are made to the wire weights elevation from known benchmarks to ensure correct readings. In the background there is housing protected with dikes along the Missouri River in Mandan, ND....

  1. PBGA wire bonding development

    Microsoft Academic Search

    W. K. Shu

    1996-01-01

    In a PBGA package, the existence of a glass transition temperature of 170~215°C for PCB substrate puts an upper ceiling to the usable wire bond temperature. The low thermal conductivity of PCB substrate and the need for a thicker material make fine pad pitch wire bonding even more difficult to do. To compensate for the limitation in thermal energy, high

  2. Wire tension versus wire frequency: an experimental Ilizarov frame study.

    PubMed

    La Russa, Valentina; Skallerud, Bjørn; Klaksvik, Jomar; Foss, Olav A

    2010-08-26

    Stability of an Ilizarov frame highly depends on maintenance of adequate tension in the wires. Wire tension should be measured accurately in experimental laboratory studies when new types of wire fixators are tested. In this study, 20 wires were tested using two different wire fixators. The wires were sequentially tensioned from 0 to 1275 N in 50 N intervals. For each tension value, corresponding vibration frequency was recorded. We then described the relationship between wire tension and wire vibration frequency in an empirical equation (R(2)=99.8). Wire vibration frequency can also be described theoretically by the Euler-Bernoulli equation for a thin beam. Theoretical frequencies were calculated and compared with corresponding experimental frequencies. A close agreement was found (95% limits of agreement, +/-3.2 Hz). This empirical equation represents a simple tool, applicable when investigating the effect of new wire fixators, pre-tensioning and frame constructions on wire tension. PMID:20472242

  3. 30 CFR 75.1003 - Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Mineral Resources 1 2011-07-01 2011-07-01 false Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley wires and trolley feeder wires. 75.1003 Section 75.1003 Mineral...

  4. 30 CFR 75.1003 - Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Mineral Resources 1 2010-07-01 2010-07-01 false Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley wires and trolley feeder wires. 75.1003 Section 75.1003 Mineral...

  5. 30 CFR 77.1802 - Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley...

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Mineral Resources 1 2011-07-01 2011-07-01 false Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley wires and trolley feeder wires. 77.1802 Section 77.1802 Mineral...

  6. 30 CFR 77.1802 - Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley...

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Mineral Resources 1 2010-07-01 2010-07-01 false Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley wires and trolley feeder wires. 77.1802 Section 77.1802 Mineral...

  7. Effects of display luminance, stimulus meaningfulness, and probe duration on visible and schematic persistence.

    PubMed

    Dixon, P; Di Lollo, V

    1991-03-01

    Partial report performance is conceived of as consisting of two independent sources of information: visible persistence and schematic persistence. Following the work of Di Lollo and Dixon (1988), these two sources of information were separated experimentally by varying interstimulus interval and stimulus onset asynchrony independently. In the present experiment we asked whether visible persistence and schematic persistence would be affected by display luminance, stimulus meaningfulness, or probe duration. The results were fit accurately by an extension of the Di Lollo and Dixon independent-decay model in which display luminance affected visible persistence but stimulus meaningfulness and probe duration affected neither form of persistence directly. PMID:2044022

  8. Venn Diagram Shape Sorter

    NSDL National Science Digital Library

    2010-01-01

    In this activity, students practice placing big and small shapes into Venn diagrams depending on the rules of the diagram. Students can either specify these rules or have the applet assign the rules so they can try to figure them out by placing shapes in the diagram. This activity allows students to explore Venn diagrams and the terms associated with set theory. This activity includes supplemental materials, including background information about the topics covered, a description of how to use the application, and exploration questions for use with the java applet.

  9. Orbiter Kapton wire operational requirements and experience

    NASA Technical Reports Server (NTRS)

    Peterson, R. V.

    1994-01-01

    The agenda of this presentation includes the Orbiter wire selection requirements, the Orbiter wire usage, fabrication and test requirements, typical wiring installations, Kapton wire experience, NASA Kapton wire testing, summary, and backup data.

  10. Towards plant wires.

    PubMed

    Adamatzky, Andrew

    2014-08-01

    In experimental laboratory studies we evaluate a possibility of making electrical wires from living plants. In scoping experiments we use lettuce seedlings as a prototype model of a plant wire. We approximate an electrical potential transfer function by applying direct current voltage to the lettuce seedlings and recording output voltage. We analyse oscillation frequencies of the output potential and assess noise immunity of the plant wires. Our findings will be used in future designs of self-growing wetware circuits and devices, and integration of plant-based electronic components into future and emergent bio-hybrid systems. PMID:24928068

  11. Advanced copper wire bonding technology

    Microsoft Academic Search

    Hong Meng Ho

    2010-01-01

    Wire bonding is the most dominant form of first-level chip interconnects in microelectronics with gold wire bonding taking the lead for the past few decades. Today, it is evident that the shift from gold to copper wire bonding is genuinely picking up, due to both a surge in gold prices and recent developments in copper wire bonding technology. The course

  12. Large-Deflection Beam Model for Schematic-Based Behavioral Simulation in NODAS

    Microsoft Academic Search

    Qi Jing; Tamal Mukherjee; Gary K. Fedder

    MEMS design in NODAS is based on a geometrically intuitive schematic representation of MEMS using a small set of atomic elements (anchors, beams, plates and electro- static gaps), each of which is associated with a geometri- cally parameterized lumped behavioral model. A linear beam model is unsuitable for simulation of devices where the beam deflection is large or where axial

  13. Science Highlight October 2010 Figure 1. Schematic process for the fabrication

    E-print Network

    Wechsler, Risa H.

    substrate is peeled off the mould. b, Scanning electron micrographs of micro-structured PDMS films. These micro-structures are replicated with high fidelity over the full size of a silicon wafer. #12;Figure 2Science Highlight ­ October 2010 Figure 1. Schematic process for the fabrication of micro

  14. Fig.1a. Schematic picture of ITER tokamak, showing the toroidal main chamber,

    E-print Network

    Lin, Zhihong

    Fig.1a. Schematic picture of ITER tokamak, showing the toroidal main chamber, material wall, and the small divertor chamber at the bottom of the main chamber Gyrokinetic particle simulation of neoclassical and b). The wall plates in the divertor chamber are periodically replaced, giving the main wall a much

  15. Perceptual Grouping, Not Emotion, Accounts for Search Asymmetries with Schematic Faces

    ERIC Educational Resources Information Center

    Becker, Stefanie I.; Horstmann, Gernot; Remington, Roger W.

    2011-01-01

    Several different explanations have been proposed to account for the search asymmetry (SA) for angry schematic faces (i.e., the fact that an angry face target among friendly faces can be found faster than vice versa). The present study critically tested the perceptual grouping account, (a) that the SA is not due to emotional factors, but to…

  16. Science Highlight January 2012 Figure 1. a, Schematic of the "solution-shearing" printing

    E-print Network

    Wechsler, Risa H.

    Science Highlight ­ January 2012 Figure 1. a, Schematic of the "solution-shearing" printing-polarized) of solution- sheared TIPS-pentacene thin films, fabricated at different printing speeds. The printing speed. Copyright Nature Publishing Group 2011. Enhanced Charge Transport in Printed Small Organic Semiconductor

  17. The development of the dialogue scripts of the graphical schematic editor of \\

    Microsoft Academic Search

    Olexandr Markelov

    2002-01-01

    The necessity of the further development of the dialogue systems model for CAD development is proved. Creation of the user dialogue scripts interaction and the electrical schematic graphic editor and its basic components are carried out. The systematic search of objects, elements in programming and links between them (an interaction matrix method) is done. The usage of the systematically analyzed

  18. Identifying Schematized Views of Self With Significant Others: Convergence of Quantitative and Clinical Methods

    Microsoft Academic Search

    Sandra L. Tunis; Bram M. Fridhandler; Mardi J. Horowitz

    1990-01-01

    This study was designed to bring together quantitative and clinical methods to describe schematized views of self. A hierarchical cluster analysis was conducted on a single subject's ratings of self in nine contexts. Descriptors had been generated by the subject (seen in therapy for social phobia) in dream reports, interviews, and projective test responses. The four-cluster solution revealed that her

  19. Mask versus Schematic - an enhanced design-verification flow for first silicon success

    Microsoft Academic Search

    Tseng-Chin Luo; Eric Leong; Mango C.-T. Chao; Philip A. Fisher; Wen-Hsiang Chang

    2010-01-01

    Layout versus Schematic (LVS) is a commonly used technique employed at the design stage to insure the correctness of physical layout. However, as process technologies continually advance, increasingly complex boolean operations are required to produce the desired on-mask patterns, which are frequently optimized to enhance transistor performance and process margin. Design layout which has been verified by LVS may undergo

  20. Cartographic Review of Indian Land Tenure and Territoriality: A Schematic Approach.

    ERIC Educational Resources Information Center

    Sutton, Imre

    2002-01-01

    Provides students of American Indian affairs with a schematic map survey in 10 subject areas that demonstrate stages in the history of Indian land tenure and territoriality. Pulls together relevant map sources and indicates their cartographic utility. Contains references in extensive notes. (SV)

  1. Algorithmic phase diagrams

    NASA Technical Reports Server (NTRS)

    Hockney, Roger

    1987-01-01

    Algorithmic phase diagrams are a neat and compact representation of the results of comparing the execution time of several algorithms for the solution of the same problem. As an example, the recent results are shown of Gannon and Van Rosendale on the solution of multiple tridiagonal systems of equations in the form of such diagrams. The act of preparing these diagrams has revealed an unexpectedly complex relationship between the best algorithm and the number and size of the tridiagonal systems, which was not evident from the algebraic formulae in the original paper. Even so, for a particular computer, one diagram suffices to predict the best algorithm for all problems that are likely to be encountered the prediction being read directly from the diagram without complex calculation.

  2. Splicing Wires Permanently With Explosives

    NASA Technical Reports Server (NTRS)

    Bement, Laurence J.; Kushnick, Anne C.

    1990-01-01

    Explosive joining process developed to splice wires by enclosing and metallurgically bonding wires within copper sheets. Joints exhibit many desirable characteristics, 100-percent conductivity and strength, no heat-induced annealing, no susceptibility to corrosion in contacts between dissimilar metals, and stability at high temperature. Used to join wires to terminals, as well as to splice wires. Applicable to telecommunications industry, in which millions of small wires spliced annually.

  3. An automatic generation of schematic maps to display Flight Routes for Air Traffic Controllers: structure and color optimization

    E-print Network

    Paris-Sud XI, Université de

    An automatic generation of schematic maps to display Flight Routes for Air Traffic Controllers Aircraft must follow strict Air Traffic Control (ATC) rules. One of these rules is that aircraft haveD picture of a schematic maps view for Air Traffic Control. Second, we propose to investigate

  4. 30 CFR 77.1802 - Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Resources 1 2013-07-01 2013-07-01 false Insulation of trolley wires, trolley feeder wires and bare signal wires...MINES Trolley Wires and Trolley Feeder Wires § 77.1802 Insulation of trolley wires, trolley feeder wires and bare signal...

  5. 30 CFR 75.1003 - Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Resources 1 2014-07-01 2014-07-01 false Insulation of trolley wires, trolley feeder wires and bare signal wires...MINES Trolley Wires and Trolley Feeder Wires § 75.1003 Insulation of trolley wires, trolley feeder wires and bare signal...

  6. 30 CFR 77.1802 - Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Resources 1 2012-07-01 2012-07-01 false Insulation of trolley wires, trolley feeder wires and bare signal wires...MINES Trolley Wires and Trolley Feeder Wires § 77.1802 Insulation of trolley wires, trolley feeder wires and bare signal...

  7. 30 CFR 77.1802 - Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley...

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Resources 1 2014-07-01 2014-07-01 false Insulation of trolley wires, trolley feeder wires and bare signal wires...MINES Trolley Wires and Trolley Feeder Wires § 77.1802 Insulation of trolley wires, trolley feeder wires and bare signal...

  8. 30 CFR 75.1003 - Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley...

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Resources 1 2012-07-01 2012-07-01 false Insulation of trolley wires, trolley feeder wires and bare signal wires...MINES Trolley Wires and Trolley Feeder Wires § 75.1003 Insulation of trolley wires, trolley feeder wires and bare signal...

  9. 30 CFR 75.1003 - Insulation of trolley wires, trolley feeder wires and bare signal wires; guarding of trolley...

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Resources 1 2013-07-01 2013-07-01 false Insulation of trolley wires, trolley feeder wires and bare signal wires...MINES Trolley Wires and Trolley Feeder Wires § 75.1003 Insulation of trolley wires, trolley feeder wires and bare signal...

  10. The geometry of polynomial diagrams

    E-print Network

    Maksim Alennikov

    2015-02-18

    In this paper we introduce the concept of polynomial diagrams and its area for special polynomials.We study the properties of polynomial area diagrams. The formula for the area of an arbitrary polynomial diagram.

  11. Pitfalls and solutions of replacing gold wire with palladium coated copper wire in IC wire bonding

    Microsoft Academic Search

    Lei-Jun Tang; Hong-Meng Ho; Wei Koh; Yue-Jia Zhang; Kay-Soon Goh; Chun-Shu Huang; Yung-Tsan Yu

    2011-01-01

    There is a growing interest in copper wire bonding for IC interconnection due to the cost savings and better material properties. Recently, palladium-coated copper (Pd-Cu) wire has emerged as the preferred choice over bare Cu wire in fine wire diameter applications, especially with BGA packages. The application of Pd-Cu wire is a solution to prevent copper oxidation during the bonding

  12. Phase Diagrams in Vivo

    NSDL National Science Digital Library

    This activity uses three experiments for students to construct a phase diagram; the experiments have been videotaped and can be seen online. The purpose of this laboratory as designed is to gain familiarity with simple phase diagrams, their construction, and their applications to the understanding of geological and environmental problems. Subsidiary objectives include development of strategies for data processing including evaluation of assumptions and sources of errors, as well as honing of computer, spreadsheet, presentation (tabular and graphical), and report writing skills.

  13. Dielectric coated wire antennas

    NASA Technical Reports Server (NTRS)

    Richmond, J. H.; Newman, E. H.

    1976-01-01

    An electrically thin dielectric insulating shell on an antenna composed of electrically thin circular cylindrical wires is examined. A moment method solution is obtained, and the insulating shell is modeled by equivalent volume polarization currents. These polarization currents are related in a simple manner to the surface charge density on the wire antenna. In this way the insulating shell causes no new unknowns to be introduced, and the size of the impedance matrix is the same as for the uninsulated wires. The insulation is accounted for entirely through a modification of the symmetric impedance matrix. This modification influences the current distribution, impedance, efficiency, field patterns, and scattering properties. The theory is compared with measurement for dielectric coated antennas in air.

  14. Wire brush fastening device

    DOEpatents

    Meigs, R.A.

    1995-09-19

    A fastening device is provided which is a variation on the conventional nut and bolt. The bolt has a longitudinal axis and threading helically affixed thereon along the longitudinal axis. A nut having a bore extending therethrough is provided. The bore of the nut has a greater diameter than the diameter of the bolt so the bolt can extend through the bore. An array of wire bristles are affixed within the bore so as to form a brush. The wire bristles extend inwardly from the bore and are constructed and arranged of the correct size, length and stiffness to guide the bolt within the bore and to restrain the bolt within the bore as required. A variety of applications of the wire brush nut are disclosed, including a bolt capture device and a test rig apparatus. 13 figs.

  15. Wire brush fastening device

    DOEpatents

    Meigs, Richard A. (East Concord, NY)

    1995-01-01

    A fastening device is provided which is a variation on the conventional nut and bolt. The bolt has a longitudinal axis and threading helically affixed thereon along the longitudinal axis. A nut having a bore extending therethrough is provided. The bore of the nut has a greater diameter than the diameter of the bolt so the bolt can extend through the bore. An array of wire bristles are affixed within the bore so as to form a brush. The wire bristles extend inwardly from the bore and are constructed and arranged of the correct size, length and stiffness to guide the bolt within the bore and to restrain the bolt within the bore as required. A variety of applications of the wire brush nut are disclosed, including a bolt capture device and a test rig apparatus.

  16. Advanced EMU Portable Life Support System (PLSS) and Shuttle/ISS EMU Schematics, a Comparison

    NASA Technical Reports Server (NTRS)

    Campbell, Colin

    2012-01-01

    In order to be able to adapt to differing vehicle interfaces such as suitport and airlock, adjust to varying vehicle pressure schedules, tolerate lower quality working fluids, and adapt to differing suit architectures as dictated by a range of mission architectures, the next generation space suit requires more adaptability and robustness over that of the current Shuttle/ISS Extra-vehicular Mobility Unit (EMU). While some features have been added to facilitate interfaces to differing vehicle and suit architectures, the key performance gains have been made via incorporation of new technologies such as the variable pressure regulators, Rapid Cycle Amine swing-bed, and Suit Water Membrane Evaporator. This paper performs a comparison between the Shuttle/ISS EMU PLSS schematic and the Advanced EMU PLSS schematic complete with a discussion for each difference.

  17. Wire bonding with Pd-coated copper wire

    Microsoft Academic Search

    Horst Clauberg; Bob Chylak; Nelson Wong; Johnny Yeung; Eugen Milke

    2010-01-01

    The last three years have seen an aggressive implementation of fine-pitch copper wire bonding in face of ever-increasing gold prices. Numerous technical hurdles associated with copper wire bonding have mostly been overcome. However, achieving process robustness equivalent to gold wire bonding is still challenging and requires enhanced manufacturing control procedures. Although the 2nd bond in copper wire bonding is generally

  18. Model schematics of carbon-nanotube-based-nanomechanical-tuner using piezoelectric strain

    NASA Astrophysics Data System (ADS)

    Won Kang, Jeong; Kim, Ki-Sub; Ryang Byun, Ki; Kang, Eu-Seok; Lee, Junha; Kuen Kwon, Oh; Gyu Choi, Young; Hwang, Ho Jung

    2010-05-01

    Model schematics of a carbon-nanotube-based frequency tuner are presented and their vibration frequencies are analyzed by theoretical approaches such as classical molecular dynamics simulations and the continuum model equation. Outertube’s position displacement by a piezoelectric strain of a piezoelectric material induces the change of the vibrating carbon nanotube length. The desired frequencies are achieved by manipulating the electric potential applied to the piezoelectric material.

  19. Composable Behavioral Models and Schematic-Based Simulation of Electrokinetic Lab-on-a-Chip Systems

    Microsoft Academic Search

    Yi Wang; Qiao Lin; Tamal Mukherjee

    2006-01-01

    This paper presents composable behavioral models and a schematic-based simulation methodology to enable top-down design of electrokinetic (EK) lab-on-a-chip (LoC). Complex EK LoCs are shown to be decomposable into a system of elements with simple geometry and specific function. Parameterized and analytical models are developed to describe the electric and biofluidic behavior within each element. Electric and biofluidic pins at

  20. Policy capturing versus a schematic interpretation on rater reaction to applicant resumes

    E-print Network

    Cardenas, Terese Yolande

    1985-01-01

    and achievement highlights. Resumes serve to introduce the applicant to the employer in hopes of securing an employment interview. It is this growing importance of resumes that provides the justification for the research proposed in this study. While... of some stimulus domain. A research question addressed the issue of whether a policy capturing model or a schematic interpretation would better explain the information processing of raters' evaluations of appli- cant resumes. In addition, a hypothesis...

  1. Icon: A Tool for Design at Schematic, Virtual Grid, and Layout Levels

    Microsoft Academic Search

    Dwight D. Hill

    1984-01-01

    The design of a custom VLSI chip requires work at several levels of abstraction. For example, random logic is naturally described as schematics, hand-entered layouts are naturally entered on a virtual grid, and machine-generated or compacted layouts are edited on an accurate, geometrically fixed grid. Icon is a new computer-aided design tool that allows these aspects of design to be

  2. OrchidWire

    NSDL National Science Digital Library

    Kozak, Theresa

    Created by orchid enthusiasts Wendell and Theresa Kozak of Vancouver Island, Canada, OrchidWire website is a great resource for anyone interested in orchids. This site is an online orchid resource directory with links to 3911 images and 1184 sites in 51 countries. Site visitors can peruse orchid resources by using an alphabetical appendix or by selecting from different categories like Wild, Culture, Geographic, Genera, and many more. Specific orchid listings or images can be located by using the site search engine. Site users can also submit suggestions for addition to the OrchidWire database.

  3. Basic Wiring. Second Edition.

    ERIC Educational Resources Information Center

    Kaltwasser, Stan; And Others

    This guide is designed to assist teachers conducting a foundation course to prepare students for additional courses of training for entry-level employment in either the residential or commercial and industrial wiring trades. Included in the guide are 17 instructional units and the following sections of information for teachers: guidelines in using…

  4. BookWire

    NSDL National Science Digital Library

    BookWire, "the first place to look for book information on the world wide web," offers many literary and publishing sites, including the Hungry Mind Review and the Boston Book Review, as well as links to publishers, authors, and booksellers.

  5. Debate: Wired versus Wireless.

    ERIC Educational Resources Information Center

    Meeks, Glenn; Nair, Prakash

    2000-01-01

    Debates the issue of investing in wiring schools for desktop computer networks versus using laptops and wireless networks. Included are cost considerations and the value of technology for learning. Suggestions include using wireless networks for existing schools, hardwiring computers for new construction, and not using computers for elementary…

  6. Wires by Patchy Particles

    NSDL National Science Digital Library

    Zhang, Zhenli

    2005-01-31

    Simulation Software: Glotzer Group Code Simulation Method: Brownian Dynamics A system of 80 spherical particles with two patches at a concentration of 0.20, was run starting at an effectively infinite temperature then instantaneously quenched to a temperature of 0.5. The final equillibrium structure is wires or chains. Simulation Model: United Atom Rigid Body with Lennard-Jones

  7. WIRE BOARD PROTOTYPING METHOD

    Microsoft Academic Search

    E. Kussul

    2006-01-01

    The modern development of new electronic devices requires rapid manufacturing of their prototypes. Printed circuit boards (PCB) used for this purpose are expensive and, as a rule, time consuming. PCB milling machines are also expensive. Here we propose a wire board manufacturing method that could be used in any laboratory for rapid prototyping of electronic devices. This method allows us

  8. Reliable Wiring Harness

    NASA Technical Reports Server (NTRS)

    Gaspar, Kenneth C.

    1987-01-01

    New harness for electrical wiring includes plugs that do not loosen from vibration. Ground braids prevented from detaching from connectors and constrained so braids do not open into swollen "birdcage" sections. Spring of stainless steel encircles ground braid. Self-locking connector contains ratchet not only preventing connector from opening, but tightens when vibrated.

  9. WiredSafety

    NSDL National Science Digital Library

    The Internet has afforded hundreds of millions of people the opportunity to access thousands of sites on almost every topic imaginable, and has created a myriad of new employment opportunities, interest groups, and cybercommunities. Regrettably, not every person merging onto the information superhighway is there for such laudable reasons. Stepping into the fray of n'er-do wells is the WiredSafety website, headed by Perry Aftab, an international cyberspace privacy and security lawyer and children's advocate. Registered as a non-profit organization, WiredSafety offers help for online victims of cybercrime and harassment, educational materials about cybercrime, and assistance for law enforcement worldwide on preventing and investigating cybercrimes. A good place to start on the site is Parry's Internet Safety Guide for Parents, which offers a number of helpful tips for parents about monitoring their children's interactions with others over the Internet. WiredSafety also offers Wired-Ed, which is offered free of charge and allows users to learn more about surfing the net safely. Also featured is a wide range of other online courses.

  10. 1997 wire development workshop: Proceedings

    SciTech Connect

    NONE

    1997-04-01

    This conference is divided into the following sections: (1) First Generation Wires I; (2) First Generation Wires II; (3) Coated conductors I; and (4) Coated conductors II. Applications of the superconducting wires include fault current limiters, superconducting motors, transformers, and power transmission lines.

  11. Approximations to wire grid inductance.

    SciTech Connect

    Warne, Larry Kevin; Johnson, William Arthur; Merewether, Kimball O.

    2004-06-01

    By using a multipole-conformal mapping expansion for the wire currents we examine the accuracy of approximations for the transfer inductance of a one dimensional array of wires (wire grid). A simple uniform fit is constructed by introduction of the decay factor from bipolar coordinates into existing formulas for this inductance.

  12. Low temperature gold wire bonding

    Microsoft Academic Search

    Y. M. Cheung; S. W; S. Ching

    1999-01-01

    We demonstrated that the bonding of gold wires for COB application was feasible at temperatures ~100°C or below by using a wedge bonder with a high frequency ultrasonic transducer (~138 kHz). An automatic rotary bondhead wedge bonder equipped with the transducer was employed to perform wire bonding. Bonding of gold wires was conducted on the aluminum pads of a test

  13. Heat-dissipating aluminum wire

    NASA Technical Reports Server (NTRS)

    Doyle, J. D.; Stringer, E. J.

    1978-01-01

    Surface area, and consequently heat dissipation, is increased by using star-shaped, rather than round cross section, for aluminum wire. When used with modern high-temperature insulating materials, pointed-star wire is suitable for applications where low-cost light-weight wire is required.

  14. Wire vibration, bowing, and breakage in wire electrical discharge machining

    NASA Astrophysics Data System (ADS)

    Arunachalam, C.; Aulia, M.; Bozkurt, B.; Eubank, P. T.

    2001-04-01

    This article provides an analysis of the wire electrical discharge machining (EDM) process. The causes of wire vibration, bowing, and breakage are identified. The cross sectional configuration of an eroded wire is derived from basic physics under the assumption that the erosion rate is constant. This configuration is verified experimentally with further explanation as to why numerous experimental studies have yielded different configurations. A computational model has been developed that can evaluate the systematic effects that lead to wire breakage by determining the stress induced by wire erosion and the stress induced by the sparks during the operation of a wire-cutting EDM machine. This model is also capable of determining the extent of wire bowing and vibrations in these machines but only in the frontal direction. The model is supported by data from experiments performed on an AGIECUT 612 wire machine cutting a 10 mm high copper bar with a 0.15 mm brass wire to acquire wire breakage data. The nearly parabolic shape of the bowed wire agrees with the results of other authors making more restrictive assumptions.

  15. Diblock copolymer phase diagram

    NSDL National Science Digital Library

    Iacovella, Christopher R.

    2006-11-20

    Adaptation of the Matsen and Bates BCP phase diagram predicted using Mean-field Theory. * Matsen MW, Bates FS, ''http://pubs3.acs.org/acs/journals/doilookup?in_doi=10.1021/ma951138i Unifying weak- and strong-segregation block copolymer theories. Diblock copolymer phase diagram as calculated using Mean-field Theory by Matsen and Bates, where fA is the Block fraction, ? is the Flory-Huggins Chi Parameter, and N is the length of the block.

  16. Numerical simulations of heavily polluted fine-grained sediment remobilization using 1D, 1D+, and 2D channel schematization.

    PubMed

    Kaiglová, Jana; Langhammer, Jakub; Ji?inec, Petr; Janský, Bohumír; Chalupová, Dagmar

    2015-03-01

    This article used various hydrodynamic and sediment transport models to analyze the potential and the limits of different channel schematizations. The main aim was to select and evaluate the most suitable simulation method for fine-grained sediment remobilization assessment. Three types of channel schematization were selected to study the flow potential for remobilizing fine-grained sediment in artificially modified channels. Schematization with a 1D cross-sectional horizontal plan, a 1D+ approach, splitting the riverbed into different functional zones, and full 2D mesh, adopted in MIKE by the DHI modeling suite, was applied to the study. For the case study, a 55-km stretch of the Bílina River, in the Czech Republic, Central Europe, which has been heavily polluted by the chemical and coal mining industry since the mid-twentieth century, was selected. Long-term exposure to direct emissions of toxic pollutants including heavy metals and persistent organic pollutants (POPs) resulted in deposits of pollutants in fine-grained sediments in the riverbed. Simulations, based on three hydrodynamic model schematizations, proved that for events not exceeding the extent of the riverbed profile, the 1D schematization can provide comparable results to a 2D model. The 1D+ schematization can improve accuracy while keeping the benefits of high-speed simulation and low requirements of input DEM data, but the method's suitability is limited by the channel properties. PMID:25687259

  17. Voronoi Diagrams Delaunay Triangulations

    E-print Network

    Kazhdan, Michael

    Voronoi Diagrams and Delaunay Triangulations O'Rourke, Chapter 5 #12;Lloyd's Algorithm (Uniform,1 2 where , = min | - |. #12;Lloyd's Algorithm (Uniform) Approach: 1. Initialize the points;Lloyd's Algorithm (Uniform) #12;Largest Empty Circle Claim: The largest empty (interior) circle within

  18. Alloy phase diagrams

    Microsoft Academic Search

    L. H. Bennett; B. C. Giessen; T. B. Massalski

    1984-01-01

    These proceedings collect papers presented at a symposium on alloy phase diagrams. Topics include: Crystal phase transformations; order-disorder transformations; crystal lattices; metallic glasses; metastable states; solubility; binary alloy systems; and alloys of iron, tantalum, silicon, aluminum, germanium, palladium, copper, and nickel.

  19. Venn Diagrams and Logic

    NSDL National Science Digital Library

    2011-01-04

    This math lesson from Illuminations uses Venn diagrams to illustrate direct, indirect and transitive reasoning. Students will learn the definitions of direct, indirect and transitive reasoning and give examples of each. Several student activity sheets are included. The material is intended for grades 9-12 and should require 2 and a half class periods to complete.

  20. Superconducting magnet wire

    DOEpatents

    Schuller, Ivan K. (Woodridge, IL); Ketterson, John B. (Evanston, IL); Banerjee, Indrajit (San Jose, CA)

    1986-01-01

    A superconducting tape or wire with an improved critical field is formed of alternating layers of a niobium-containing superconductor such as Nb, NbTi, Nb.sub.3 Sn or Nb.sub.3 Ge with a thickness in the range of about 0.5-1.5 times its coherence length, supported and separated by layers of copper with each copper layer having a thickness in the range of about 170-600 .ANG..

  1. Understanding Guitar Wiring

    NSDL National Science Digital Library

    This zipped file provides a number of documents which will help students understand the particulars of guitar wiring. The documents cover the three-way toggle switch, the 5-way lever-action switch, magnetic pick-ups, mini toggle switches, output jacks, selector switches and other details. Once the zipped file is downloaded, the documents (which are in Microsoft Word doc file format) may be viewed.

  2. Wiring for aerospace applications

    NASA Technical Reports Server (NTRS)

    Christian, J. L., Jr.; Dickman, J. E.; Bercaw, R. W.; Myers, I. T.; Hammoud, A. N.; Stavnes, M.; Evans, J.

    1992-01-01

    In this paper, the authors summarize the current state of knowledge of arc propagation in aerospace power wiring and efforts by the National Aeronautics and Space Administration (NASA) towards the understanding of the arc tracking phenomena in space environments. Recommendations will be made for additional testing. A database of the performance of commonly used insulating materials will be developed to support the design of advanced high power missions, such as Space Station Freedom and Lunar/Mars Exploration.

  3. Dual wire welding torch and method

    DOEpatents

    Diez, Fernando Martinez (Peoria, IL); Stump, Kevin S. (Sherman, IL); Ludewig, Howard W. (Groveland, IL); Kilty, Alan L. (Peoria, IL); Robinson, Matthew M. (Peoria, IL); Egland, Keith M. (Peoria, IL)

    2009-04-28

    A welding torch includes a nozzle with a first welding wire guide configured to orient a first welding wire in a first welding wire orientation, and a second welding wire guide configured to orient a second welding wire in a second welding wire orientation that is non-coplanar and divergent with respect to the first welding wire orientation. A method of welding includes moving a welding torch with respect to a workpiece joint to be welded. During moving the welding torch, a first welding wire is fed through a first welding wire guide defining a first welding wire orientation and a second welding wire is fed through a second welding wire guide defining a second welding wire orientation that is divergent and non-coplanar with respect to the first welding wire orientation.

  4. Wire detecting apparatus and method

    SciTech Connect

    Kronberg, J.W.

    1991-12-31

    This invention is comprised of an apparatus and method that combines a signal generator and a passive signal receiver to detect and record the path of partially or completely concealed electrical wiring without disturbing the concealing surface. The signal generator applies a series of electrical pulses to the selected wiring of interest. The applied pulses create a magnetic field about the wiring that can be detected by a coil contained within the signal receiver. An audible output connected to the receiver and driven by the coil reflects the receiver`s position with respect to the wiring. The receiver`s audible signal is strongest when the receiver is directly above the wiring and the long axis of the receiver`s coil is parallel to the wiring. A marking means is mounted on the receiver to mark the location of the wiring as the receiver is directed over the wiring`s concealing surface. Numerous marks made on various locations of the concealing surface will trace the path of the wiring of interest.

  5. Manually Operated Welding Wire Feeder

    NASA Technical Reports Server (NTRS)

    Rybicki, Daniel J. (Inventor)

    2001-01-01

    A manual welding wire feeder apparatus comprising a bendable elongate metal frame with a feed roller mounted at the center thereof for rotation about an axis transverse to the longitudinal axis of the frame. The frame ends are turned up as tabs and each provided with openings in alignment with each other and the mid-width center of the roller surface. The tab openings are sized to accommodate welding wire and each extends to a side edge of the tab, both opening on the same side of the frame, whereby welding wire can be side-loaded onto the frame. On the side of the frame, opposite the roller a lock ring handle is attached tangentially and is rotatable about the attachment point and an axis perpendicular to the frame. The device is grasped in the hand normally used to hold the wire. A finger is placed through the loop ring and the frame positioned across the palm and lower fingers. The thumb is positioned atop the wire so it can be moved from the back of the frame across the roller, and towards the front. In doing so, the wire is advanced at a steady rate in axial alignment with the tab openings and roller. To accommodate different wire diameters the frame is bendable about its center in the plane of the frame axis and wire so as to keep the wire in sufficient tension against the roller and to keep the wire fixed when the frame is tilted and thumb pressure released.

  6. Reduction in wire tension caused by wire clamping and wire tensioner removal: an experimental Ilizarov frame study.

    PubMed

    La Russa, Valentina; Skallerud, Bjørn; Klaksvik, Jomar; Foss, Olav A

    2011-03-01

    The stability of an external ring fixator mainly depends on wire tension. Wire fixators should maintain the tension during both wire clamping to the ring and removal of the tensioner device. In the present study the loss in wire tension related to fixator clamping and wire tensioner removal using three different wire fixator designs was studied. The fixators were based on two different cannulated bolts and a washer. Effects from two different pretension levels in combination with three different bolt torque levels upon loss in wire tension were described. Emitted wire vibration frequency was used to assess the corresponding wire tension. Wire tension was determined after each wire fixator tightening and after the removal of the wire tensioner. Increased bolt torque led to a small decrease in tension for both pretension levels. A considerable higher tension loss was measured when removing the wire tensioner. In all cases, the combination of a new cannulated bolt and a washer maintained the highest tension. PMID:21485324

  7. Metering Wheel-Wire Track Wire Boom Deployment Mechanism

    NASA Technical Reports Server (NTRS)

    Granoff, Mark S.

    2014-01-01

    The NASA MMS Spin Plane Double Probe (SDP) Deployer utilizes a helical path, rotating Metering Wheel and a spring loaded Wire "Holding" Track to pay out a "fixed end" 57 meter x 1.5 mm diameter Wire Boom stored between concentric storage cylinders. Unlike rotating spool type storage devices, the storage cylinders remain stationary, and the boom wire is uncoiled along the length of the cylinder via the rotation of the Metering Wheel. This uncoiling action avoids the need for slip-ring contacts since the ends of the wire can remain stationary. Conventional fixed electrical connectors (Micro-D type) are used to terminate to operational electronics.

  8. A Feynman Diagram Analyser DIANA

    E-print Network

    M. Tentyukov; J. Fleischer

    1999-04-07

    A C-program DIANA (DIagram ANAlyser) for the automatic Feynman diagram evaluation is presented. It consists of two parts: the analyzer of diagrams and the interpreter of a special text manipulating language. This language is used to create a source code for analytical or numerical evaluations and to keep the control of the process in general.

  9. On web diagrams Jun Murakami

    E-print Network

    On web diagrams Jun Murakami Department of Mathematics, Graduate School of Science, Osaka­ tive invariant is defined in the space of web diagrams, and it includes the Casson­ Walker invariant of the mapping class groups. (cf. [9], [10]) 2. Web space 2.1. Web diagram. To explain the universal perturbative

  10. Energy Diagram Explorer

    NSDL National Science Digital Library

    Zollman, Dean

    This resource illustrates classical energy diagrams for 1D motion. It simulates an experiment where the energy of a cart with a magnet can be changed by putting magnets along a track. The resultant potential and kinetic energy are shown, along with the motion of the cart. The positions and polarities of the track magnets, and the position, total energy, mass, and friction of the cart can all be changed.

  11. Review of wire chamber aging

    SciTech Connect

    Va'Vra, J.

    1986-02-01

    This paper makes an overview of the wire chamber aging problems as a function of various chamber design parameters. It emphasizes the chemistry point of view and many examples are drawn from the plasma chemistry field as a guidance for a possible effort in the wire chamber field. The paper emphasizes the necessity of variable tuning, the importance of purity of the wire chamber environment, as well as it provides a practical list of presently known recommendations. In addition, several models of the wire chamber aging are qualitatively discussed. The paper is based on a summary talk given at the Wire Chamber Aging Workshop held at LBL, Berkeley on January 16-17, 1986. Presented also at Wire Chamber Conference, Vienna, February 25-28, 1986. 74 refs., 18 figs., 11 tabs.

  12. 30 CFR 75.701-4 - Grounding wires; capacity of wires.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Grounding § 75.701-4 Grounding wires; capacity of wires. Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if: (a) The...

  13. 30 CFR 75.701-4 - Grounding wires; capacity of wires.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Grounding § 75.701-4 Grounding wires; capacity of wires. Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if: (a) The...

  14. 30 CFR 75.701-4 - Grounding wires; capacity of wires.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Grounding § 75.701-4 Grounding wires; capacity of wires. Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if: (a) The...

  15. 30 CFR 75.701-4 - Grounding wires; capacity of wires.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Grounding § 75.701-4 Grounding wires; capacity of wires. Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if: (a) The...

  16. 30 CFR 75.701-4 - Grounding wires; capacity of wires.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...Grounding § 75.701-4 Grounding wires; capacity of wires. Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if: (a) The...

  17. Texture development in Galfenol wire

    NASA Astrophysics Data System (ADS)

    Boesenberg, A. J.; Restorff, J. B.; Wun-Fogle, M.; Sailsbury, H.; Summers, E.

    2013-05-01

    Galfenol (Fe-Ga alloy) wire fabrication provides a low cost alternative to directional solidification methods. This work evaluates the compositional dependence of the wire drawing suitability of Fe-Ga and characterizes the microstructural and magnetic properties of these wires. Wire has been produced with Ga contents between 10 at. % and 17 at. % to allow determination of the ductile to brittle transition (DTBT) in wire manufacture. Published results on chill cast bend specimens indicated that a DTBT occurs at roughly 15 at. % Ga. This DTBT was observed under tensile loading with a corresponding change in fracture behavior from transverse fracture to intergranular fracture. For improved magnetostrictive performance, higher Ga contents are desired, closer to the 17 at. % Ga evaluated in this work. Electron backscattered diffraction B-H loop and resonance measurements as a function of magnetic field (to determine modulus and coupling factor) are presented for as-drawn, furnace, and direct current (DC) annealed wire. Galfenol wire produced via traditional drawing methods is found to have a strong <110> (?) texture parallel to the drawing direction. As-drawn wire was observed to have a lower magnetic permeability and larger hysteresis than DC annealed wire. This is attributed to the presence of a large volume of crystalline defects; such as vacancies and dislocations.

  18. Subminiature Hot-Wire Probes

    NASA Technical Reports Server (NTRS)

    Westphal, R. V.; Lemos, F. R.; Ligrani, P. M.

    1989-01-01

    Class of improved subminiature hot-wire flow-measuring probes developed. Smaller sizes yield improved resolution in measurements of practical aerodynamic flows. Probe made in one-wire, two-perpendicular-wire, and three-perpendicular-wire version for measurement of one, two, or all three components of flow. Oriented and positioned on micromanipulator stage and viewed under microscope during fabrication. Tested by taking measurements in constant-pressure turbulent boundary layer. New probes give improved measurements of turbulence quantities near surfaces and anisotropies of flows strongly influence relative errors caused by phenomena related to spatial resolution.

  19. Plasma Formation Around Single Wires

    NASA Astrophysics Data System (ADS)

    Duselis, Peter U.; Kusse, Bruce R.

    2002-12-01

    At Cornell's Laboratory of Plasma Studies, single wires of various metals were exploded using a ˜250 ns pulser with a rise time of ˜20 A/ns. It was found that the wires first experience a resistive heating phase that lasts 50-80 ns before a rapid collapse of voltage. From that point on, the voltage across the wire was negligible while the current through the wire continued to increase. We attribute this voltage collapse to the formation of plasma about the wire. Further confirmation of this explanation will be presented along with new experimental data describing preliminary spectroscopy results, the expansion rate of the plasma, and current flow along the wire as a function of radius. The resistance of the wire-electrode connection will be shown to significantly affect the energy deposition. Various diagnostics were used to obtain these experiments. Ultraviolet sensitive vacuum photodiodes and a framing camera with an 8 ns shutter were used to detect and measure the width of the visible light emitted by the plasma. A special wire holder was constructed that allowed the transfer of current from the wire to the surrounding plasma to be observed.

  20. The challenges of copper wire bonding

    Microsoft Academic Search

    C. T.-h. Lu

    2010-01-01

    Advantages of Cu wire bonding, such as less wire sweep, better performance for analog devices, are interpreted by its material properties. Alternative aspect from material properties on Cu wire bonding parameters is proposed to reflect the fact that Cu wire bonding may not necessarily damage the existing under-pad structure of integrated circuit designed for Au wire bonding. The challenge of

  1. Two-Wire to Four-Wire Audio Converter

    NASA Technical Reports Server (NTRS)

    Talley, G. L., Jr; Seale, B. L.

    1983-01-01

    Simple circuit provides interface between normally incompatible voicecommunication lines. Circuit maintains 40 dB of isolation between input and output halves of four-wire line permitting two-wire line to be connected. Balancing potentiometer, Rg, adjusts gain of IC2 to null feed through from input to output. Adjustment is done on workbench just after assembly.

  2. Improved superconducting magnet wire

    DOEpatents

    Schuller, I.K.; Ketterson, J.B.

    1983-08-16

    This invention is directed to a superconducting tape or wire composed of alternating layers of copper and a niobium-containing superconductor such as niobium of NbTi, Nb/sub 3/Sn or Nb/sub 3/Ge. In general, each layer of the niobium-containing superconductor has a thickness in the range of about 0.05 to 1.5 times its coherence length (which for Nb/sub 3/Si is 41 A) with each copper layer having a thickness in the range of about 170 to 600 A. With the use of very thin layers of the niobium composition having a thickness within the desired range, the critical field (H/sub c/) may be increased by factors of 2 to 4. Also, the thin layers of the superconductor permit the resulting tape or wire to exhibit suitable ductility for winding on a magnet core. These compositions are also characterized by relatively high values of critical temperature and therefore will exhibit a combination of useful properties as superconductors.

  3. Northern Pacific Railroad Bridge and Wire Weight

    USGS Multimedia Gallery

    Wire weight is lowered to water surface to measure stage at a site. Levels are made to the wire weights elevation from known benchmarks to ensure correct readings. This wire weight is located along the Missouri River in Bismarck, ND....

  4. Figure 1. Schematic of a coplanar-waveguide fed quarter-wavelength monopole antenna.

    E-print Network

    Papapolymerou, Ioannis "John"

    . SURFACE MICROMACHINED ELECTROMAGNETICALLY RADIATING RF MEMS Y.-K. Yoon, B. Pan, P. Kirby, J. Papapolymerou collision detection, imaging, and indoor local communication [2, 3]. One of the key components, mutual coupling with substrate, and surface wave perturbation [4]. Meanwhile, although wire antennas

  5. Wire Stripper Holds Insulation Debris

    NASA Technical Reports Server (NTRS)

    Cook, Allen D.; Morris, Henry S.; Bauer, Laverne

    1994-01-01

    Attachment to standard wire-stripping tool catches bits of insulation as they are removed from electrical wire and retains them for proper disposal. Prevents insulation particles from falling at random, contaminating electronic equipment and soiling workspace. Commercial tool modified by attaching small collection box to one of the jaws.

  6. The Current in a Wire

    ERIC Educational Resources Information Center

    Thompson, Keith

    2009-01-01

    This little problem arose because I was frustrated with the standard electromagnetism texts, which show the magnetic field due to a current-bearing wire outside the wire [proportional to] 1/r and inside [proportional to] r. However, they never point out that the moving electrons must be influenced by the magnetic field created by the other moving…

  7. A wire bond reliability model

    Microsoft Academic Search

    T. L. Heleine; R. M. Murcko; S.-C. Wang

    1991-01-01

    A defect modeling approach is developed which allows the determination of the true failure rate with a minimal sample size. A model was developed using the proposed approach to estimate the failure rate of an aluminium\\/1% silicon wire ultrasonically bonded to aluminum and to gold pads. For this reliability model the variable was wire-bond width. Dependent upon the width of

  8. Wire bonds over active circuits

    Microsoft Academic Search

    Gail Heinen; Roger J. Stierman; Darvin Edwards; L. Nye

    1994-01-01

    A reliable process-for wire bonding over active integrated circuits, which are subsequently assembled in plastic packages, has been developed. This technology accommodates reducing the silicon die area required for bond pads and for on-chip bussing. Further, it supports area array wire bonding by allowing larger bond pads with relaxed pitch without sacrificing silicon area. This is accomplished by processing an

  9. Failure Analysis of Wire Bonds

    Microsoft Academic Search

    Harry A. Schafft

    1973-01-01

    Failure analysis of wire bonds has an important part to play in determining the causes of microelectronic device failure and ways for making and using devices to achieve greater reliability. Several tests and procedures used in the failure analysis of wire bonds are reviewed. Some of the inferences. about possible causes of permanent or intermittent failure that can be drawn

  10. Device to extrude indium wires

    Microsoft Academic Search

    M. Ece; R. Devito; G. Vidali

    1986-01-01

    A homemade, versatile, low-cost device to extrude indium wire for vacuum seals is described. It has the advantage that no boule of indium has to be made in advance, thereby reducing the amount of poisonous indium vapors, and that wires of different sizes can be made.

  11. Device to extrude indium wires

    NASA Astrophysics Data System (ADS)

    Ece, M.; DeVito, R.; Vidali, G.

    1986-12-01

    A homemade, versatile, low-cost device to extrude indium wire for vacuum seals is described. It has the advantage that no boule of indium has to be made in advance, thereby reducing the amount of poisonous indium vapors, and that wires of different sizes can be made.

  12. Internal wire guide for GTAW welding

    NASA Technical Reports Server (NTRS)

    Morgan, Gene E. (inventor); Dyer, Gerald E. (inventor)

    1989-01-01

    A welding torch for gas tungsten arc welding apparatus has a filler metal wire guide positioned within the torch, and within the shielding gas nozzle. The wire guide is adjacent to the tungsten electrode and has a ceramic liner through which the wire is fed. This reduces the size of the torch and eliminates the outside clearance problems that exit with external wire guides. Additionally, since the wire is always within the shielding gas, oxidizing of the wire is eliminated.

  13. Electrode carrying wire for GTAW welding

    NASA Technical Reports Server (NTRS)

    Morgan, Gene E. (inventor); Dyer, Gerald E. (inventor)

    1990-01-01

    A welding torch for gas tungsten arc welding apparatus has a hollow tungsten electrode including a ceramic liner and forms the filler metal wire guide. The wire is fed through the tungsten electrode thereby reducing the size of the torch to eliminate clearance problems which exist with external wire guides. Since the wire is preheated from the tungsten more wire may be fed into the weld puddle, and the wire will not oxidize because it is always within the shielding gas.

  14. Human life support during interplanetary travel and domicile. II - Generic Modular Flow Schematic modeling

    NASA Technical Reports Server (NTRS)

    Farral, Joseph F.; Seshan, P. K.; Rohatgi, Naresh K.

    1991-01-01

    This paper describes the Generic Modular Flow Schematic (GMFS) architecture capable of encompassing all functional elements of a physical/chemical life support system (LSS). The GMFS can be implemented to synthesize, model, analyze, and quantitatively compare many configurations of LSSs, from a simple, completely open-loop to a very complex closed-loop. The GMFS model is coded in ASPEN, a state-of-the-art chemical process simulation program, to accurately compute the material, heat, and power flow quantities for every stream in each of the subsystem functional elements (SFEs) in the chosen configuration of a life support system. The GMFS approach integrates the various SFEs and subsystems in a hierarchical and modular fashion facilitating rapid substitutions and reconfiguration of a life support system. The comprehensive ASPEN material and energy balance output is transferred to a systems and technology assessment spreadsheet for rigorous system analysis and trade studies.

  15. Open-Source Semantic and Schematic Mediation in Hydrogeologic Spatial Data Infrastructures

    NASA Astrophysics Data System (ADS)

    Boisvert, E.; Brodaric, B.

    2008-12-01

    A common task in cyber-based data environments, hydrogeologic or otherwise, is an initial search for data amongst distributed heterogeneous sources, followed by amalgamation of the multiple results into a single file organized using a common structure and perhaps standard content. For example, querying water well databases to obtain a list of the rock materials that occur beyond a certain ground depth, represented in some specific XML dialect. This task is often achieved with the aid of open geospatial technologies (OGC), which conveniently enable interoperability at the system and syntax levels by providing standard web service interfaces (WMS, WFS, WCS) and a standard data transfer language (GML). However, at present such technologies, which are mainly non-open source, provide minimal support for interoperating at the schematic and semantic levels, meaning it is difficult to query the data sources and obtain results in a common data structure populated with standard content. Classical data integration systems provide mediator and wrapper middleware to address this issue: mediators dispatch queries to distributed data repositories and integrate query results, while wrappers perform translation to common standards for both queries and results, and these actions are typically supported by ontologies. Under this classical scenario existing open geospatial services can be considered wrappers with minimal translation capacity, thus requiring a mediator to both integrate and translate. Consequently, we have used open source components to develop a re-usable mediator that operates as a virtual open geospatial web service (WFS), one that integrates and translates both query requests and results from OGC-wrapped data sources to common standards. The mediator is designed as a customizable XML processing pipeline that operates on declarative descriptions that support schematic and semantic translation. It is being implemented in virtual environments for hydrogeology to enhance knowledge of Canada's watersheds, as well as in environments aimed at the delivery of geologic information. Discussed will be the role and design of the mediator and its implementation in a distributed groundwater information context.

  16. Warped penguin diagrams

    NASA Astrophysics Data System (ADS)

    Csáki, Csaba; Grossman, Yuval; Tanedo, Philip; Tsai, Yuhsin

    2011-04-01

    We present an analysis of the loop-induced magnetic dipole operator in the Randall-Sundrum model of a warped extra dimension with anarchic bulk fermions and an IR brane-localized Higgs. These operators are finite at one-loop order and we explicitly calculate the branching ratio for ??e? using the mixed position/momentum space formalism. The particular bound on the anarchic Yukawa and Kaluza-Klein (KK) scales can depend on the flavor structure of the anarchic matrices. It is possible for a generic model to either be ruled out or unaffected by these bounds without any fine-tuning. We quantify how these models realize this surprising behavior. We also review tree-level lepton flavor bounds in these models and show that these are on the verge of tension with the ??e? bounds from typical models with a 3 TeV Kaluza-Klein scale. Further, we illuminate the nature of the one-loop finiteness of these diagrams and show how to accurately determine the degree of divergence of a five-dimensional loop diagram using both the five-dimensional and KK formalism. This power counting can be obfuscated in the four-dimensional Kaluza-Klein formalism and we explicitly point out subtleties that ensure that the two formalisms agree. Finally, we remark on the existence of a perturbative regime in which these one-loop results give the dominant contribution.

  17. Manufacture and quality control of interconnecting wire hardnesses, Volume 1

    NASA Technical Reports Server (NTRS)

    1972-01-01

    A standard is presented for manufacture, installation, and quality control of eight types of interconnecting wire harnesses. The processes, process controls, and inspection and test requirements reflected are based on acknowledgment of harness design requirements, acknowledgment of harness installation requirements, identification of the various parts, materials, etc., utilized in harness manufacture, and formulation of a typical manufacturing flow diagram for identification of each manufacturing and quality control process, operation, inspection, and test. The document covers interconnecting wire harnesses defined in the design standard, including type 1, enclosed in fluorocarbon elastomer convolute, tubing; type 2, enclosed in TFE convolute tubing lines with fiberglass braid; type 3, enclosed in TFE convolute tubing; and type 5, combination of types 3 and 4. Knowledge gained through experience on the Saturn 5 program coupled with recent advances in techniques, materials, and processes was incorporated.

  18. Nano-storage wires.

    PubMed

    Lee, Dong Jun; Kim, Eunji; Kim, Daesan; Park, Juhun; Hong, Seunghun

    2013-08-27

    We report the development of "nano-storage wires" (NSWs), which can store chemical species and release them at a desired moment via external electrical stimuli. Here, using the electrodeposition process through an anodized aluminum oxide template, we fabricated multisegmented nanowires composed of a polypyrrole segment containing adenosine triphosphate (ATP) molecules, a ferromagnetic nickel segment, and a conductive gold segment. Upon the application of a negative bias voltage, the NSWs released ATP molecules for the control of motor protein activities. Furthermore, NSWs can be printed onto various substrates including flexible or three-dimensional structured substrates by direct writing or magnetic manipulation strategies to build versatile chemical storage devices. Since our strategy provides a means to store and release chemical species in a controlled manner, it should open up various applications such as drug delivery systems and biochips for the controlled release of chemicals. PMID:23859333

  19. Diagram spaces and symmetric spectra

    Microsoft Academic Search

    Steffen Sagave; Christian Schlichtkrull

    2011-01-01

    We present a general homotopical analysis of structured diagram spaces and discuss the relation to symmetric spectra. The main motivating examples are the I-spaces, which are diagrams indexed by finite sets and injections, and J-spaces, which are diagrams indexed by the Grayson-Quillen construction on the category of finite sets and bijections. We show that the category of I-spaces provides a

  20. Farthest line segment Voronoi diagrams

    Microsoft Academic Search

    Franz Aurenhammer; Robert L. Scot Drysdale; Hannes Krasser

    2006-01-01

    The farthest line segment Voronoi diagram shows properties different from both the closest-segment Voronoi diagram and the farthest-point Voronoi diagram. Surprisingly, this structure did not receive attention in the computational geometry literature. We analyze its combinatorial and topological properties and outline an O(nlogn) time construction algorithm that is easy to im- plement. No restrictions are placed upon the n input

  1. Metastable phases and phase diagrams

    Microsoft Academic Search

    M. Baricco; M. Palumbo; E. Bosco; L. Battezzati

    2004-01-01

    In this paper, the basic features of the novel field of the use of phase diagrams for the description of metastability will be outlined. Examples of experimental determination and calculation of metastable phase diagrams will be presented. In particular, metastable phase diagrams will be used to describe phase selection in cast iron (Fe-C) and stainless steels (Fe-Ni-Cr), showing the effect

  2. Generating function for web diagrams

    E-print Network

    A. A. Vladimirov

    2014-09-06

    We present the description of the exponentiated diagrams in terms of generating function within the universal diagrammatic technique. In particular, we show the exponentiation of the gauge theory amplitudes involving products of an arbitrary number of Wilson lines of arbitrary shapes, which generalizes the concept of web diagrams. The presented method gives a new viewpoint on the web diagrams and proves the non-Abelian exponentiation theorem.

  3. Diagonal Slices of 3D Young Diagrams in the Approach of Maya Diagrams

    NASA Astrophysics Data System (ADS)

    Cai, Li-Qiang; Wang, Li-Fang; Wu, Ke; Yang, Jie

    2014-09-01

    According to the correspondence between 2D Young diagrams and Maya diagrams and the relation between 2D and 3D Young diagrams, we construct 3D Young diagrams in the approach of Maya diagrams. Moreover, we formulate the generating function of 3D Young diagrams, which is the MacMahon function in terms of Maya diagrams.

  4. Identification of Rayleigh and ``breathing'' modes for a cylindrical wire

    NASA Astrophysics Data System (ADS)

    Molinero, I.; de Billy, M.; Quentin, G.

    1986-09-01

    We describe an experimental confirmation of the existence of Rayleigh and ``breathing'' modes in the case of an infinite elastic wire immersed in water. The resonance isolation and identification method initiated by G. Maze and J. Ripoche [Rev. Phys. Appl. 18, 319 (1983)] is used. The different parameters related to the use of this method are adjusted to take into account the dimensions of the target and the attenuation of each mode. The polar diagrams of the amplitude of the resonating part of the received signal confirm the existence of (n,1) and (0,1) modes.

  5. Development and testing of laser Doppler system components for wake vortex monitoring. Volume 2: Scanner operations manual

    NASA Technical Reports Server (NTRS)

    Edwards, B. B.; Coffey, E. W.

    1974-01-01

    The theory and operation of the scanner portion of the laser Doppler system for detecting and monitoring aircraft trailing vortices in an airport environment are discussed. Schematics, wiring diagrams, component values, and operation and checkout procedures are included.

  6. Electrician Job Number: 45112537

    E-print Network

    Heller, Barbara

    , solid state circuitry, electronics, electrical-mechanical devices, transmission systems, interface units, AC/DC motors, wiring diagrams and schematics, computers, inspection and digital devices possess an interest in and an aptitude for mechanics, electronics, and electrical. #12;

  7. WIRE Mishap Investigation Board Report

    E-print Network

    Rhoads, James

    § Attitude Control/Dynamics Analysis............................................................. 14 § Pyro Electronics Analysis: Failure Mechanism Determination.................... 17 § Summary of the Mishap Diagram ......................................................... 209 H. Pegasus Attitude Disturbance

  8. Figure 1. Schematic drawing showing the components of a Li-ion battery cell and the information that can be

    E-print Network

    Figure 1. Schematic drawing showing the components of a Li-ion battery cell and the information on electron and ionic transfer across solid­solid and solid­liquid interfaces and within each-phase reaction or an interface between the conducting electrode and the electrolyte. The largest and most

  9. Electron photodetachment in the presence of a static electric field via correlation functions: revisitation of a very schematic atomic model

    Microsoft Academic Search

    G. P. Arrighini; N. Durante; C. Guidotti

    1995-01-01

    The photodetachment cross section of an electron from a negative atomic ion in the presence of a strong, static, electric field has been evaluated as a function of the frequency of the electromagnetic radiation according to a very schematic model previously considered by other authors. Emphasis is placed on the quality of the results obtained by approximating the quantum mechanical

  10. Fig 1. Schematic of the TCM scheme employed with a depiction of the signal set partitioning and selection

    E-print Network

    Park, Namkyoo

    Fig 1. Schematic of the TCM scheme employed with a depiction of the signal set partitioning M. Sathish Kumar1 , Hosung Yoon2 and Namkyoo Park1 1 School of Electrical Engineering and ComputerDPSK. TCM, a spectrally efficient error control coding scheme[4] used successfully in electrical

  11. Differences in Aspects of Preschoolers' Race Schema: Race Schematization, Race-Based Peer Preferences, and Memory for Racially Stereotyped Drawings.

    ERIC Educational Resources Information Center

    Levy, Gary D.; Katz, Phyllis A.

    This study applied a schema-based, social information processing model to examine the development of social cognitive aspects of preschoolers' racial stereotyping and stereotype beliefs (i.e., preschoolers' race schemas). The study examined developmental and individual differences in preschoolers' race schematization (salience of the race…

  12. Computer-aided design and fabrication of wire-wrap (trademark) type circuit boards: A new symbolism and its implementation

    NASA Astrophysics Data System (ADS)

    Montminy, B.; Carbonneau, R.; Laflamme, A.; Lessard, M.; Blanchard, A.

    1982-02-01

    We define here an encoding symbolism that permits, with a minimum of statements, a thorough description of the numerous interconnections of complex electronic circuitry. This symbolism has been integrated at the Defence Research Establishment Valcartier in a computer-aided method that considerably eases the passage between an engineering electronic schematic and the related interconnection matrix required for Wire-Wrap (Trademark) hardware. Electronics prototyping has been dramatically speeded up with this technique because of the time savings in the preparatory reduction of interconnection data.

  13. Service life of corrosion-damaged wire

    Microsoft Academic Search

    A. A. Filip'ev

    1975-01-01

    obtained of the effect of corrosion damage on the fatigue life of wire and wire products, since in tests of this type the corrosion damage incurred before or in the first stages of service is usually neglected. The fatigue properties of the wire corroded under stress are usually also neglected. In our tests we used a high-strength steel wire [GOST

  14. Fine pitch copper wire bonding — Why now?

    Microsoft Academic Search

    Bernd K. Appelt; Andy Tseng; Yi-Shao Lai

    2009-01-01

    Fine pitch Cu wire bonding is at the cusp of becoming main stream. Many challenges had to be overcome when making the transition from fine pitch Au wire bonding to fine pitch Cu wire bonding in a high volume manufacturing environment. The challenges for Cu wire bonding arise from the inherent properties of Cu: propensity to oxidize, increased hardness, slow

  15. 29 CFR 1919.79 - Wire rope.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 7 2011-07-01 2011-07-01 false Wire rope. 1919.79 Section 1919.79 Labor Regulations...Shore-Based Material Handling Devices § 1919.79 Wire rope. (a) Wire rope and replacement wire rope shall be of the...

  16. 29 CFR 1919.79 - Wire rope.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 7 2010-07-01 2010-07-01 false Wire rope. 1919.79 Section 1919.79 Labor Regulations...Shore-Based Material Handling Devices § 1919.79 Wire rope. (a) Wire rope and replacement wire rope shall be of the...

  17. Spring control of wire harness loops

    NASA Technical Reports Server (NTRS)

    Curcio, P. J.

    1979-01-01

    Negator spring control guides wire harness between movable and fixed structure. It prevents electrical wire harness loop from jamming or being severed as wire moves in response to changes in position of aircraft rudder. Spring-loaded coiled cable controls wire loop regardless of rudder movement.

  18. Potential-pH Diagrams.

    ERIC Educational Resources Information Center

    Barnum, Dennis W.

    1982-01-01

    Potential-pH diagrams show the domains of redoxpotential and pH in which major species are most stable. Constructing such diagrams provides students with opportunities to decide what species must be considered, search literature for equilibrium constants and free energies of formation, and practice in using the Nernst equation. (Author/JN)

  19. Physiology Flow-Diagram Models

    NSDL National Science Digital Library

    PhD Sandra J Bruner (Polk Community College Biology)

    2005-10-04

    A set of physiology flow-diagrams for the cardiovascular system, cardiac auto-rhythmic cell, cardiac contractile cell, respiratory system, coagulation/hemostasis, digestive system, excretion, and autonomic nervous system. These flow-diagrams show cause-and-effect markup and have accompanying tutorials.

  20. Time Temperature Transformation (TTT) Diagrams

    E-print Network

    Cambridge, University of

    isothermal transformation diagram Definition: TTT diagrams give the kinetics of isothermal transformations. 2 measurement, dilatometry (Fig. 3), electrical resistivity method, magnetic permeability, in situ diffraction-temperature salt-bath for isothermal treatment. Fig. 1 : Salt bath I -austenitisation heat treatment. 4 #12;Fig . 3

  1. Demonstrating Forces between Parallel Wires.

    ERIC Educational Resources Information Center

    Baker, Blane

    2000-01-01

    Describes a physics demonstration that dramatically illustrates the mutual repulsion (attraction) between parallel conductors using insulated copper wire, wooden dowels, a high direct current power supply, electrical tape, and an overhead projector. (WRM)

  2. Schematic Diagram of Physical and Chemical Steps to extract Al and Be from Quartz-bearing rocks Quartz separation and pre-

    E-print Network

    Bookhagen, Bodo

    % HF + 1%HNO3 acid mixture on hot-dog rollers or in ultrasonic tanks B.2 heavy- liquid separation Part A: Quartz separation and pre- treatment in the mineral separation laboratory optional A.1 rock crushing A.1 sieving to 1.5 mm A.2 magnetic separation (Frantz

  3. Forest Research Schematic diagram of the life cycle of Agrilus biguttatus on native oak trees in Britain -from egg to adult

    E-print Network

    () enabling eggs to be placed deep in bark cracks. START year 1 In warmer climates development may in Britain - from egg to adult The Research Agency of the Forestry Commission© Crown Copyright 2011 FR overwintering period Eggs hatch and larvae feed on the cambial tissues creating sinuous galleries. Females lay

  4. Izzo et al. New Phytologist 2005 Supplemental figures Figure S1. Schematic diagram of sample design. a. Plot distribution across the 4-ha

    E-print Network

    Silver, Whendee

    . a. Plot distribution across the 4-ha compartment. Each point represents a plot located in an Abies. Bjelland 61 (AY011014) 86%/151 90 AY702739 Ascomycota8 206 Otidea grandis (AF072096) 94%/35 43 AY702740

  5. Transformations of triangle ladder diagrams

    E-print Network

    Igor Kondrashuk; Alvaro Vergara

    2010-02-13

    It is shown how dual space diagrammatic representation of momentum integrals corresponding to triangle ladder diagrams with an arbitrary number of rungs can be transformed to half-diamonds. In paper arXiv:0803.3420 [hep-th] the half-diamonds were related by conformal integral substitution to the diamonds which represent the dual space image of four-point ladder integrals in the four-dimensional momentum space. Acting in the way described in the present paper we do not need to use the known result for diamond (four-point) diagrams as an external input in deriving relations of arXiv:0803.3420 [hep-th], however, that result for the diamond diagram arises in the present proof as an intermediate consequence in a step-by-step diagrammatic transformation from the triangle ladder diagram to the half-diamond diagrams.

  6. Copper wire bond investigation on multiple surface finishes - enabling wire bond packages without gold

    Microsoft Academic Search

    Mustafa Oezkoek; Nigel White; Horst Clauberg

    2011-01-01

    During the past two years, fine pitch copper wire bonding has finally entered high volume production. It is estimated that nearly 15% of all wire bonders used in production are now equipped for copper wire bonding. Most of these are used exclusively for copper wire bonding. In terms of pitch, copper wire is only barely lagging behind the most advanced

  7. Silicon Ingot Wire Cutting Animation

    NSDL National Science Digital Library

    This Quicktime animation is of a single wire slicing the silicon ingot into thin wafers. By using a thinner wire, and by cutting all wafers at that same time, this minimizes material loss. This animation is the third in a series showing silicon wafer production process after it has been ground to the correct diameter.The previous animation showing silicon ingot rod grinding can be seen here.The next animation in this sequence about silicon wafer lapping can be seen here.

  8. Smart Wire Grid: Resisting Expectations

    SciTech Connect

    Ramsay, Stewart; Lowe, DeJim

    2014-03-03

    Smart Wire Grid's DSR technology (Discrete Series Reactor) can be quickly deployed on electrical transmission lines to create intelligent mesh networks capable of quickly rerouting electricity to get power where and when it's needed the most. With their recent ARPA-E funding, Smart Wire Grid has been able to move from prototype and field testing to building out a US manufacturing operation in just under a year.

  9. Method of manufacturing superconductor wire

    DOEpatents

    Motowidlo, Leszek

    2014-09-16

    A method for forming Nb.sub.3Sn superconducting wire is provided. The method employs a powder-in-tube process using a high-tin intermetallic compound, such as MnSn.sub.2, for producing the Nb.sub.3Sn. The use of a high-tin intermetallic compound enables the process to perform hot extrusion without melting the high-tin intermetallic compound. Alternatively, the method may entail drawing the wire without hot extrusion.

  10. Integrating UML diagrams for production control systems

    Microsoft Academic Search

    Hans J. Köhler; Ulrich Nickel; Jörg Niere; Albert Zündorf

    2000-01-01

    This paper proposes to use SDL block diagrams, UML class diagrams, and UML behavior diagrams like collaboration diagrams, activity diagrams, and statecharts as a visual programming language. We describe a modeling approach for flexible, autonomous production agents, which are used for the decentralization of production control systems. In order to generate a (Java) implementation of a production control system from

  11. Vibrating wires for beam diagnostics

    E-print Network

    Arutunian, S G; Wittenburg, Kay

    2015-01-01

    A new approach to the technique of scanning by wires is developed. Novelty of the method is that the wire heating quantity is used as a source of information about the number of interacting particles. To increase the accuracy and sensitivity of measurements the wire heating measurement is regenerated as a change of wire natural oscillations frequency. By the rigid fixing of the wire ends on the base an unprecedented sensitivity of the frequency to the temperature and to the corresponding flux of colliding particles. The range of used frequencies (tens of kHz) and speed of processes of heat transfer limit the speed characteristics of proposed scanning method, however, the high sensitivity make it a perspective one for investigation of beam halo and weak beam scanning. Traditional beam profile monitors generally focus on the beam core and loose sensitivity in the halo region where a large dynamic range of detection is necessary. The scanning by a vibrating wire can be also successfully used in profiling and det...

  12. HTS Wire Development Workshop: Proceedings

    SciTech Connect

    Not Available

    1994-07-01

    The 1994 High-Temperature Superconducting Wire Development Workshop was held on February 16--17 at the St. Petersburg Hilton and Towers in St. Petersburg, Florida. The meeting was hosted by Florida Power Corporation and sponsored by the US Department of Energy`s Superconductivity Program for Electric Power Systems. The meeting focused on recent high-temperature superconducting wire development activities in the Department of Energy`s Superconductivity Systems program. The meeting opened with a general discussion on the needs and benefits of superconductivity from a utility perspective, the US global competitiveness position, and an outlook on the overall prospects of wire development. The meeting then focused on four important technology areas: Wire characterization: issues and needs; technology for overcoming barriers: weak links and flux pinning; manufacturing issues for long wire lengths; and physical properties of HTS coils. Following in-depth presentations, working groups were formed in each technology area to discuss the most important current research and development issues. The working groups identified research areas that have the potential for greatly enhancing the wire development effort. These areas are discussed in the summary reports from each of the working groups. This document is a compilation of the workshop proceedings including all general session presentations and summary reports from the working groups.

  13. Historical evolution of a micro-tidal lagoon simulated by a 2-D schematic model

    NASA Astrophysics Data System (ADS)

    Bonaldo, D.; Di Silvio, G.

    2013-11-01

    Coastal transitional environments such as estuaries, coastal inlets and tidal lagoons are the result of the interaction of several exogenous forcing factors (e.g. tidal regime, local wind and wave climate, sea-level rise, sediment supply) many of which are, in principle, variable in time over historical and geological timescales. Besides the natural variability of the external constraints, human interventions in some components of the system can either directly or indirectly affect long-term sediment dynamics in the whole system. In this paper the evolution of a schematic tidal basin, with non-uniform sediments and subject to geological and anthropogenic processes, is reproduced by means of a two dimensional morphodynamic model and qualitatively compared to the events which historically took place in the Venice Lagoon during the last four centuries; the trend for the next 200 years is also investigated. In particular, the effect on both morphology and bottom composition of river diversion, jetty construction, human-induced subsidence and channel dredging are presented and discussed.

  14. Schematic designs for penetration seals for a repository in Richton Dome. [Richton Dome

    SciTech Connect

    Kelsall, P.C.; Case, J.B.; Meyer, D.; Franzone, J.G.; Coons, W.E.

    1985-12-01

    The isolation of radioactive wastes in geologic repositories requires that human-made penetrations such as shafts, tunnels, or boreholes are adequately sealed. This report describes schematic seal designs for a repository in dome salt referenced to the geology of the Richton Dome in Mississippi. The designs are presented for extensive peer review and will be updated as conceptual designs if the Richton Dome is selected as a candidate repository site. The principal components of the seal system are concrete bulkheads and dense earth backfill placed in salt and anhydrite horizons in the shafts and in the tunnels in the shaft pillar. Crushed salt backfill is placed throughout the disposal areas. Close to the waste, this backfill should consolidate in response to closure of the rooms, resulting in effective encapsulation of the waste within a period of about 1000 years. Analyses based on a limited amount of laboratory testing indicate that consolidation rates will be relatively slow at locations further removed from the waste. Rates of consolidation are slow because of the slow-creeping properties of the Richton Dome salt and because of the relatively shallow (1900 feet) repository depth.

  15. A LAMP-based schematic prototype instrument for detection of microorganisms in human outer space activities

    NASA Astrophysics Data System (ADS)

    Hu, Yongfei; Liu, Zhiheng; Li, Junxiong; Zhu, Baoli

    One of the main tasks of human outer space exploration is to detect signs of life. Based on meteoritic evidence, common ancestry hypothesis has been posed. Therefore, searching for the fundamental molecules (DNA, RNA, and proteins) that constitute life as we know on Earth is feasible and now the typical approach. To achieve this goal, portable, robust, and highly sensitive instrument is also needed. In this study, based on Loop mediated isothermal amplification (LAMP) technique that targets life information storage molecular, DNA, we designed a schematic prototype instrument for microorganism detection. First, we designed LAMP primers used for amplification of DNA markers of Bacteria, Archaea, and Fungus; then, we optimized the LAMP reaction system for space using; and finally, we designed a prototype instrument and operating software system that are compatible with the LAMP reaction system. The results of simulation experiments showed that our instrument performed well for detecting representative microorganisms and the device can achieve semi-automatization. The detection process, from sample preparation to signal visualization, was completed in 1.5 hour. Our study provides a new method and corresponding device for detection of DNA molecular, which has great potential for applications in outer space exploration. Besides, the instrument we designed can also been used for monitoring changes of terrestrial microorganisms in outer space, for example in aircraft.

  16. Particles, Feynman Diagrams and All That

    ERIC Educational Resources Information Center

    Daniel, Michael

    2006-01-01

    Quantum fields are introduced in order to give students an accurate qualitative understanding of the origin of Feynman diagrams as representations of particle interactions. Elementary diagrams are combined to produce diagrams representing the main features of the Standard Model.

  17. Phase diagram of polypeptide chains

    NASA Astrophysics Data System (ADS)

    Auer, Stefan

    2011-11-01

    We use a coarse grained protein model that enables us to determine the equilibrium phase diagram of natively folded ?-helical and unfolded ?-sheet forming peptides. The phase diagram shows that there are only two thermodynamically stable peptide phases, the peptide solution and the bulk fibrillar phase. In addition, it reveals the existence of various metastable peptide phases. The liquidlike oligomeric phases are metastable with respect to the fibrillar phases, and there is a hierarchy of metastability. The presented phase diagram provides a solid basis for understanding the assembly of polypeptide chains into the phases formed in their natively folded and unfolded conformations.

  18. Plasma arc torch with coaxial wire feed

    DOEpatents

    Hooper, Frederick M (Albuquerque, NM)

    2002-01-01

    A plasma arc welding apparatus having a coaxial wire feed. The apparatus includes a plasma arc welding torch, a wire guide disposed coaxially inside of the plasma arc welding torch, and a hollow non-consumable electrode. The coaxial wire guide feeds non-electrified filler wire through the tip of the hollow non-consumable electrode during plasma arc welding. Non-electrified filler wires as small as 0.010 inches can be used. This invention allows precision control of the positioning and feeding of the filler wire during plasma arc welding. Since the non-electrified filler wire is fed coaxially through the center of the plasma arc torch's electrode and nozzle, the wire is automatically aimed at the optimum point in the weld zone. Therefore, there is no need for additional equipment to position and feed the filler wire from the side before or during welding.

  19. Coulomb interaction effects on the Majorana states in quantum wires.

    PubMed

    Manolescu, A; Marinescu, D C; Stanescu, T D

    2014-04-30

    The stability of the Majorana modes in the presence of a repulsive interaction is studied in the standard semiconductor wire-metallic superconductor configuration. The effects of short-range Coulomb interaction, which is incorporated using a purely repulsive ?-function to model the strong screening effect due to the presence of the superconductor, are determined within a Hartree-Fock approximation of the effective Bogoliubov-De Gennes Hamiltonian that describes the low-energy physics of the wire. Through a numerical diagonalization procedure we obtain interaction corrections to the single particle eigenstates and calculate the extended topological phase diagram in terms of the chemical potential and the Zeeman energy. We find that, for a fixed Zeeman energy, the interaction shifts the phase boundaries to a higher chemical potential, whereas for a fixed chemical potential this shift can occur either at lower or higher Zeeman energies. These effects can be interpreted as a renormalization of the g-factor due to the interaction. The minimum Zeeman energy needed to realize Majorana fermions decreases with the increasing strength of the Coulomb repulsion. Furthermore, we find that in wires with multi-band occupancy this effect can be enhanced by increasing the chemical potential, i.e. by occupying higher energy bands. PMID:24722427

  20. Computer calculation of distribution diagrams.

    PubMed

    Maggiore, R; Musumeci, S; Sammartano, S

    1976-01-01

    A simple computer program (DISDI) has been developed for obtaining the distribution diagrams of the species in solutions containing up to one metal and two ligands. It has been compared with the programs COMICS and EQUIL. PMID:18961796

  1. Nitrogen–Oxygen Phase Diagram

    Microsoft Academic Search

    C. S. Barrett; Lothar Meyer; Sandra C. Greer; J. Wasserman

    1968-01-01

    We have determined the phase diagram for the notrogen–oxygen system by examining the x-ray diffraction patterns of polycrystalline samples of the solidified mixtures over the temperature range 21°–50°K. The diagram exhibits a surprising complexity: a eutectic line divides the liquid and the two-phase region of (?-O2 + ?-N2), and a peritectoid line separates this two-phase region and a new phase,

  2. Z diagrams of composite objects

    Microsoft Academic Search

    T. Jaroszewicz; Stanley J. Brodsky

    1991-01-01

    We examine the effect of particle compositeness on the importance of ``Z diagrams'', i.e., virtual particle-antiparticle states appearing in scattering processes. The examples of positronium in QED, and of the nucleon in the QCD-based quark model, are discussed in detail. Generally, if the composite particle consists of N constituents, its Z-diagram amplitude involves creation and annihilation of N constituent-anticonstituent pairs.

  3. Diagram Designer 1.23

    NSDL National Science Digital Library

    Vinther, Michael

    Turning out flowcharts and diagrams for presentations can be quite a hassle, so it's nice to lean about the Diagram Designer application. With the program's interface, visitors can take advantage of the customizable object palette, slide show viewer, and the ability to plot mathematical expressions. This version also allows users to import various image file formats, such as jpeg and gif files. This version is compatible with computers running Windows 98 and newer.

  4. False Recall Is Reduced by Damage to the Ventromedial Prefrontal Cortex: Implications for Understanding the Neural Correlates of Schematic Memory

    PubMed Central

    Jones, Samuel H.; Duff, Melissa C.; Tranel, Daniel

    2014-01-01

    Schematic memory, or contextual knowledge derived from experience (Bartlett, 1932), benefits memory function by enhancing retention and speeding learning of related information (Bransford and Johnson, 1972; Tse et al., 2007). However, schematic memory can also promote memory errors, producing false memories. One demonstration is the “false memory effect” of the Deese–Roediger–McDermott (DRM) paradigm (Roediger and McDermott, 1995): studying words that fit a common schema (e.g., cold, blizzard, winter) often produces memory for a nonstudied word (e.g., snow). We propose that frontal lobe regions that contribute to complex decision-making processes by weighting various alternatives, such as ventromedial prefrontal cortex (vmPFC), may also contribute to memory processes by weighting the influence of schematic knowledge. We investigated the role of human vmPFC in false memory by combining a neuropsychological approach with the DRM task. Patients with vmPFC lesions (n = 7) and healthy comparison participants (n = 14) studied word lists that excluded a common associate (the critical item). Recall and recognition tests revealed expected high levels of false recall and recognition of critical items by healthy participants. In contrast, vmPFC patients showed consistently reduced false recall, with significantly fewer intrusions of critical items. False recognition was also marginally reduced among vmPFC patients. Our findings suggest that vmPFC increases the influence of schematically congruent memories, a contribution that may be related to the role of the vmPFC in decision making. These novel neuropsychological results highlight a role for the vmPFC as part of a memory network including the medial temporal lobes and hippocampus (Andrews-Hanna et al., 2010). PMID:24872571

  5. Wires for Shape Memory Actuators

    NASA Astrophysics Data System (ADS)

    Casati, R.; Vedani, M.; Gialanella, S.; Tuissi, A.

    2014-07-01

    The effect of non-conventional electrical pulse treatment on microstructure and shape memory response of Ni49Ti51 wires was studied. High-power rapid current square pulses were applied to cold-drawn wires of 25 µm diameter. The TEM microstructures showed equiaxial recrystallization, with average grain size in the 100 nm range, after a double current pulse lasting 10 ms. Rapid current pulse treatment in Ti-rich NiTi induces shape memory effect with reduced thermal hysteresis and high recovery strain values. This novel treatment might replace conventional pre-device shape setting/training of the wire with a post-device shape setting with promising industrial advantages.

  6. Antenna coupled photonic wire lasers.

    PubMed

    Kao, Tsung-Yu; Cai, Xiaowei; Lee, Alan W M; Reno, John L; Hu, Qing

    2015-06-29

    Slope efficiency (SE) is an important performance metric for lasers. In conventional semiconductor lasers, SE can be optimized by careful designs of the facet (or the modulation for DFB lasers) dimension and surface. However, photonic wire lasers intrinsically suffer low SE due to their deep sub-wavelength emitting facets. Inspired by microwave engineering techniques, we show a novel method to extract power from wire lasers using monolithically integrated antennas. These integrated antennas significantly increase the effective radiation area, and consequently enhance the power extraction efficiency. When applied to wire lasers at THz frequency, we achieved the highest single-side slope efficiency (~450 mW/A) in pulsed mode for DFB lasers at 4 THz and a ~4x increase in output power at 3 THz compared with a similar structure without antennas. This work demonstrates the versatility of incorporating microwave engineering techniques into laser designs, enabling significant performance enhancements. PMID:26191717

  7. Designing potentials by sculpturing wires

    E-print Network

    Leonardo Della Pietra; Simon Aigner; Christoph vom Hagen; Sönke Groth; Israel Bar-Joseph; Henri J. Lezec; Jörg Schmiedmayer

    2008-02-12

    Magnetic trapping potentials for atoms on atom chips are determined by the current flow in the chip wires. By modifying the shape of the conductor we can realize specialized current flow patterns and therefore micro-design the trapping potentials. We have demonstrated this by nano-machining an atom chip using the focused ion beam technique. We built a trap, a barrier and using a BEC as a probe we showed that by polishing the conductor edge the potential roughness on the selected wire can be reduced. Furthermore we give different other designs and discuss the creation of a 1D magnetic lattice on an atom chip.

  8. Wire Detection Algorithms for Navigation

    NASA Technical Reports Server (NTRS)

    Kasturi, Rangachar; Camps, Octavia I.

    2002-01-01

    In this research we addressed the problem of obstacle detection for low altitude rotorcraft flight. In particular, the problem of detecting thin wires in the presence of image clutter and noise was studied. Wires present a serious hazard to rotorcrafts. Since they are very thin, their detection early enough so that the pilot has enough time to take evasive action is difficult, as their images can be less than one or two pixels wide. Two approaches were explored for this purpose. The first approach involved a technique for sub-pixel edge detection and subsequent post processing, in order to reduce the false alarms. After reviewing the line detection literature, an algorithm for sub-pixel edge detection proposed by Steger was identified as having good potential to solve the considered task. The algorithm was tested using a set of images synthetically generated by combining real outdoor images with computer generated wire images. The performance of the algorithm was evaluated both, at the pixel and the wire levels. It was observed that the algorithm performs well, provided that the wires are not too thin (or distant) and that some post processing is performed to remove false alarms due to clutter. The second approach involved the use of an example-based learning scheme namely, Support Vector Machines. The purpose of this approach was to explore the feasibility of an example-based learning based approach for the task of detecting wires from their images. Support Vector Machines (SVMs) have emerged as a promising pattern classification tool and have been used in various applications. It was found that this approach is not suitable for very thin wires and of course, not suitable at all for sub-pixel thick wires. High dimensionality of the data as such does not present a major problem for SVMs. However it is desirable to have a large number of training examples especially for high dimensional data. The main difficulty in using SVMs (or any other example-based learning method) is the need for a very good set of positive and negative examples since the performance depends on the quality of the training set.

  9. New insulation constructions for aerospace wiring applications

    NASA Technical Reports Server (NTRS)

    Slenski, George

    1994-01-01

    Outlined in this presentation is the background to insulation constructions for aerospace wiring applications, the Air Force wiring policy, the purpose and contract requirements of new insulation constructions, the test plan, and the test results.

  10. 30 CFR 56.12047 - Guy wires.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Electricity § 56.12047 Guy wires. Guy wires of poles supporting high-voltage transmission lines shall meet the...

  11. 30 CFR 57.12047 - Guy wires.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12047 Guy wires. Guy wires of poles supporting high-voltage...

  12. 30 CFR 56.12047 - Guy wires.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Electricity § 56.12047 Guy wires. Guy wires of poles supporting high-voltage transmission lines shall meet the...

  13. 30 CFR 56.12047 - Guy wires.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Electricity § 56.12047 Guy wires. Guy wires of poles supporting high-voltage transmission lines shall meet the...

  14. 30 CFR 57.12047 - Guy wires.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12047 Guy wires. Guy wires of poles supporting high-voltage...

  15. 30 CFR 57.12047 - Guy wires.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12047 Guy wires. Guy wires of poles supporting high-voltage...

  16. 30 CFR 57.12047 - Guy wires.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-UNDERGROUND METAL AND NONMETAL MINES Electricity Surface and Underground § 57.12047 Guy wires. Guy wires of poles supporting high-voltage...

  17. 30 CFR 56.12047 - Guy wires.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Electricity § 56.12047 Guy wires. Guy wires of poles supporting high-voltage transmission lines shall meet the...

  18. 46 CFR 111.60-11 - Wire.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...60-11 Section 111.60-11 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) ELECTRICAL ENGINEERING ELECTRIC SYSTEMS-GENERAL REQUIREMENTS Wiring Materials and Methods § 111.60-11 Wire....

  19. Wire Capture Programs for Macintosh and IBM.

    ERIC Educational Resources Information Center

    Wiley, Gale

    1989-01-01

    Discusses wire capture programs (computer programs which gather and process wire services such as the Associated Press or United Press) for computer labs in journalism departments. Describes details of such programs for Macintosh, IBM, and IBM clones. (SR)

  20. Illumination system for wire bonding inspection

    NASA Astrophysics Data System (ADS)

    Perng, Der-Baau; Chou, Cheng-Chuan; Lee, Shu-Ming

    2007-02-01

    A novel lighting system was devised for 3D defect inspection in the wire bonding process. Gold wires of 20 ?m in diameter were bonded to connect the integrated circuit (IC) chip with the substrate. Bonding wire defects can be classified as 2D type and 3D type. The 2D-type defects include missed, shifted, or shorted wires. These defects can be inspected from a 2D top-view image of the wire. The 3D-type bonding wire defects are sagging wires, and are difficult to inspect from a 2D top-view image. A structured lighting system was designed and developed to facilitate all 2D-type and 3D-type defect inspection. The devised lighting system can be programmed to turn the structured LEDs on or off independently. Experiments show that the devised illumination system is effective for wire bonding inspection and will be valuable for further applications.

  1. Wire mesh isolator protects sensitive electronic components

    NASA Technical Reports Server (NTRS)

    Kerley, J. J., Jr.

    1965-01-01

    Sensitive electronic components are enclosed in wire mesh for protection. The wire mesh isolates the component from shock and vibration. It acts as a heat sink and as a screen against RF interference.

  2. Quality control of microelectronic wire bonds

    NASA Technical Reports Server (NTRS)

    Thiel, R. A.; Schmidt, G. D.

    1975-01-01

    Report evaluates ultrasonic bonding of small-diameter aluminum wire joined to ceramic substrates metalized with thin-film and thick-film gold. Quick testing technique for nondestructive location of poor wire bonds is also presented.

  3. Two-dimensional line space Voronoi Diagram

    Microsoft Academic Search

    Stéphane Rivière; Dominique Schmitt

    2007-01-01

    Given a set of points called sites, the Voronoi diagram is a partition of the plane into sets of points having the same closest site. Several generalizations of the Voronoi diagram have been studied, mainly Voronoi diagrams for different distances (other than the Euclidean one), and Voronoi diagrams for sites that are not necessarily points (line segments for example). In

  4. DRAWING DIAGRAMS IN AN ONLINE EXAMINATION

    Microsoft Academic Search

    Pete Thomas

    This paper describes a study into the drawing of diagrams in an online examination. The diagrams were produced by students during an on-line examination using a simple drawing tool. The students' examination answers, which included a diagram, were submitted over the Internet to an automatic marking tool for grading and feedback. This paper describes the diagram drawing tool and discusses

  5. Automatically Assessing Graph-Based Diagrams

    ERIC Educational Resources Information Center

    Thomas, Pete; Smith, Neil; Waugh, Kevin

    2008-01-01

    To date there has been very little work on the machine understanding of imprecise diagrams, such as diagrams drawn by students in response to assessment questions. Imprecise diagrams exhibit faults such as missing, extraneous and incorrectly formed elements. The semantics of imprecise diagrams are difficult to determine. While there have been…

  6. 21 CFR 870.1330 - Catheter guide wire.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Catheter guide wire. 870.1330 Section 870...Cardiovascular Diagnostic Devices § 870.1330 Catheter guide wire. (a) Identification. A catheter guide wire is a coiled wire that is...

  7. 30 CFR 57.12053 - Circuits powered from trolley wires.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Circuits powered from trolley wires. 57.12053 Section 57.12053... § 57.12053 Circuits powered from trolley wires. Ground wires for lighting circuits powered from trolley wires shall be connected securely to...

  8. 30 CFR 57.12053 - Circuits powered from trolley wires.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Circuits powered from trolley wires. 57.12053 Section 57.12053... § 57.12053 Circuits powered from trolley wires. Ground wires for lighting circuits powered from trolley wires shall be connected securely to...

  9. Shape-Memory Wires Switch Rotary Actuator

    NASA Technical Reports Server (NTRS)

    Brudnicki, Myron J.

    1992-01-01

    Thermomechanical rotary actuator based on shape-memory property of alloy composed of equal parts of titanium and nickel. If alloy stretched while below transition temperature, it reverts to original length when heated above transition temperature. Two capstans on same shaft wrapped with shape-memory wires. As one wire heated, it contracts and stretches opposite wire. Wires heated in alternation so they switch shaft between two extreme angular positions; "on" and "off" positions of rotary valve.

  10. Further Studies Of Hot-Wire Anemometry

    NASA Technical Reports Server (NTRS)

    Mckenzie, Robert; Logan, Pamela; Bershader, Daniel

    1990-01-01

    Report discusses factors affecting readings of hot-wire anemometer in turbulent supersonic boundary layer. Represents extension of work described in "Hot-Wire Anemometry Versus Laser-Induced Fluorescence" (ARC-11802). Presents theoretical analysis of responses of hot-wire probe to changes in flow; also compares measurements by hot-wire probe with measurements of same flows by laser-induced fluorescence (LIF).

  11. NEMA wire and cable standards development programs

    NASA Technical Reports Server (NTRS)

    Baird, Robert W.

    1994-01-01

    The National Electrical Manufacturers Association (NEMA) is the nation's largest trade association for manufacturers of electrical equipment. Its member companies produce components, end-use equipment and systems for the generation, transmission, distribution, control and use of electricity. The wire and cable division is presented in 6 sections: building wire and cable, fabricated conductors, flexible cords, high performance wire and cable, magnet wire, and power and control cable. Participating companies are listed.

  12. Force on a Current Carrying Wire

    NSDL National Science Digital Library

    VU Bioengineering RET Program, School of Engineering,

    Students use a simple set up consisting of a current carrying wire and a magnet to explore the forces which enable biomedical imaging. In doing so, students run a current through a wire and then hold magnets in various positions to establish and explore the magnetic force acting on the wire. They move the magnets and change the current in the wire to explore how the force changes.

  13. Moving Large Wiring-Harness Boards

    NASA Technical Reports Server (NTRS)

    Shepherd, Samuel D.; Gurman, Isaac

    1990-01-01

    Carrier for wiring-harness fabrication boards enables lone operator to move board easily and safely. Holds harness while operator fabricating, while being stored, and being transported to equipment frame for mounting. When positioned for assembly of wiring harness, board and carrier give operator easy and convenient access to wires and cables, when positioned for transfer of wiring harness to or from storage area, carrier holds board securely while moved by one person.

  14. Evaluation of wire bonding performance, process conditions, and metallurgical integrity of chip on board wire bonds

    Microsoft Academic Search

    Daniel T. Rooney; Deepak Nager; David Geiger; Dongkai Shanguan

    2005-01-01

    Chip on board wire bonding presents challenges to modern wire bonding technology which include smaller, closely spaced wire bond pads; bonding to soft substrates without special processing and pad construction; and diverse first bond and second bond metallurgies. These challenges are addressed by extensive bonding accuracy tests, a design of experiments approach for optimizing wire bond process parameters, reliability testing,

  15. Wire bonding of Cu and Pd coated Cu wire: Bondability, reliability, and IMC formation

    Microsoft Academic Search

    Ivy Qin; Hui Xu; Horst Clauberg; Ray Cathcart; Viola L. Acoff; Bob Chylak; Cuong Huynh

    2011-01-01

    Wire bonding with bare Cu and Pd coated Cu (PdCu) wire have been adopted quickly as a mainstream packaging technology for high pin count and fine pitch devices. The differences between Au and Cu wire bonding are well understood as a result of extensive research. However, the differences between Cu and PdCu wire have not been investigated in as much

  16. Transport Through Carbon Nanotube Wires

    NASA Technical Reports Server (NTRS)

    Anantram, M. P.; Kwak, Dochan (Technical Monitor)

    2001-01-01

    This viewgraph presentation deals with the use of carbon nanotubes as a transport system. Contact, defects, tubular bend, phonons, and mechanical deformations all contribute to reflection within the nanotube wire. Bragg reflection, however, is native to an ideal energy transport system. Transmission resistance depends primarily on the level of energy present. Finally, the details regarding coupling between carbon nanotubes and simple metals are presented.

  17. Vocational Preparation Curriculum: Electrical Wiring.

    ERIC Educational Resources Information Center

    Usoro, Hogan

    This document is a curriculum guide for instructors teaching vocational preparation for electrical wiring to special needs students. The purpose of the curriculum guide is to provide minimum skills for disadvantaged and handicapped students entering the mainstream; to supplement vocational skills of those students already in a regular training…

  18. Fabrication of tungsten wire needles

    SciTech Connect

    Roder, A.

    1983-02-01

    Fine point needles for field emissoin are conventionally produced by electrolytically or chemically etching tungsten wire. Points formed in this manner have a typical tip radius of about 0.5 microns and a cone angle of some 30 degrees. The construction of needle matrix detector chambers has created a need for tungsten needles whose specifications are: 20 mil tungsten wire, 1.5 inch total length, 3 mm-long taper (resulting in a cone angle of about 5 degrees), and 25 micron-radius point (similar to that found on sewing needles). In the process described here for producing such needles, tungsten wire, immersed in a NaOH solution and in the presence of an electrode, is connected first to an ac voltage and then to a dc supply, to form a taper and a point on the end of the wire immersed in the solution. The process parameters described here are for needles that will meet the above specifications. Possible variations will be discussed under each approprite heading.

  19. Health care's 100 most wired.

    PubMed

    Solovy, A; Serb, C

    1999-02-01

    They're wired all right, and America's 100 most techno-savvy hospitals and health systems share one more thing: a commitment to using technology to link with employees, patients, suppliers, and insurers. "We want to be a health care travel agency for our community," says one chief information officer. "And we see Internet technology as a key." PMID:10081454

  20. Failure mechanisms in wire ropes

    Microsoft Academic Search

    C. R. Chaplin

    1995-01-01

    The inevitable attrition of wire rope in service is discussed with an overview of the consequences in terms of inspection and replacement criteria. Details are presented of specific degradation mechanisms observed in three different applications: a mine hoist rope operating on a drum winder, a mooring rope for an offshore structure and a spin-resistant single-fall offshore crane rope. In each

  1. Coulomb drag between quantum wires

    NASA Astrophysics Data System (ADS)

    Klesse, Rochus; Stern, Ady

    2000-12-01

    We study Coulomb drag in a pair of parallel one-dimensional electron systems within the framework of the Tomonaga-Luttinger model. We find that Coulomb coupling has a much stronger effect on one-dimensional wires than on two-dimensional layers: At zero temperature the transresistivity diverges, due to the formation of locked charge density waves. At temperature well above a crossover temperature T* the transresistivity follows a power law ?~Tx, where the interaction-strength dependent exponent x is determined by the Luttinger liquid parameter Kc- of the relative charge mode. At temperature below T* relative charge displacements are enabled by solitonic excitations, reflected by an exponential temperature dependence. The crossover temperature T* depends sensitively on the wire width, interwire distance, Fermi wavelength and the effective Bohr radius. For wire distances d¯>>k-1F it is exponentially suppressed with T*/EF~exp[-d¯kF/(1-Kc-)]. The behavior changes drastically if each of the two wires develop spin gaps. In this case we find that the transresistivity vanishes at zero temperature. We discuss our results in view of possible experimental realizations in GaAs-AlxGa1-xAs semiconductor structures.

  2. Locating Hidden Hazards in Electrical Wiring

    Microsoft Academic Search

    Paul K. Kuhn

    2006-01-01

    Hazardous electrical wiring has been identified as an area of critical national and international concern. Faulty and improperly installed electrical wiring is a leading cause of fires in homes and commercial buildings. Wiring is also responsible for numerous problems in consumer product safety, vehicular safety\\/reliability, safety of nuclear facilities, reliability of power distribution systems, reliability of communication systems, and others.

  3. Dwell times of thin exploding wires

    Microsoft Academic Search

    Antonios E. Vlasto´s

    1973-01-01

    Equations describing the dependence of the dwell times on the applied voltage of thin exploding wires whose restrikes are initiated at the exterior or the interior of the exploded wire are derived, using the energy equation for the ionized gas surrounding the wire and the Paschen law for the sparking potential, respectively. A comparison of the computed and the experimentally

  4. Development of a robot car wiring system

    Microsoft Academic Search

    Kyong-mo Koo; Xin Jiang; Kohei Kikuchi; A. Konno; M. Uchiyama

    2008-01-01

    In this paper, the development of a robot car wiring system is addressed. It is designed to be used for automatically assembling wire harness into a car body. This operation is among the most difficult tasks of vehicle assembly and is not yet automated. Based on an analysis of the requirements for a robot car wiring system, we propose a

  5. Industrial electromagnetic checkout of armored wiring

    NASA Astrophysics Data System (ADS)

    Ferre, J.

    1983-03-01

    A method for testing whether armored wiring can withstand EMP's caused by nuclear explosions is described. The wires are checked in their production cases, using a strip line antenna as pulse source. Only one measurement per connector is made, with the connector conductors in parallel. The method is quick, repeatable, and does not damage the wiring.

  6. Getting "Wired" for McLuhan's Cyberculture.

    ERIC Educational Resources Information Center

    McMurdo, George

    1995-01-01

    Examines the introduction of the computing magazine, "Wired", into the United Kingdom's (UK) market. Presents conversations with the founder and editorial staff of the UK edition, and discusses the accessibility of "Wired" via the World Wide Web. Describes 10 articles from United States "Wired" back-issues and presents critiques of a utopian…

  7. Thermosonic Gold Wire Bonding to Copper Conductors

    Microsoft Academic Search

    VERNON A. PITT; CHRISTOPHER R. S. NEEDES

    1982-01-01

    The use of thick film copper conductors in hybrid microcircuitry requires that wire bonding to their surfaces be demonstrated as a feasible and reliable interconnection technique. Previous work has shown that acceptable and reliable ultrasonic aluminum wire bonds can be made to copper. The conditions necessary to make successful thermosonic gold wire bonds to copper are described. Items covered are

  8. Home and School Technology: Wired versus Wireless.

    ERIC Educational Resources Information Center

    Van Horn, Royal

    2001-01-01

    Presents results of informal research on smart homes and appliances, structured home wiring, whole-house audio/video distribution, hybrid cable, and wireless networks. Computer network wiring is tricky to install unless all-in-one jacketed cable is used. Wireless phones help installers avoid pre-wiring problems in homes and schools. (MLH)

  9. Lourie-Love No OIT Wiring

    E-print Network

    1942 1941 Lourie-Love 1922 1940 58 No OIT Wiring Building Wiring Type Category 3 or Mixed Category 5 Enhanced Category 5 Building Wiring Speed Not Gigabit Gigabit Gigabit & All 100Mb Connections Outdoor WiFi Area Full WiFi Coverage N (EduRoam Capable) Wireless Network Outdoor WiFi Area (Edu

  10. Development of copper wire bonding application technology

    Microsoft Academic Search

    KENJI TOYOZAWA; KAZUYA FUJITA; SYOZO MINAMIDE; TAKAMICHI MAEDA

    1990-01-01

    The continuous forming of oxide-free, stable, spherical copper balls which has been realized by blowing a reducing gas over the copper wire during copper ball formation (sparkling) is described. The prevention of chip damage resulting from hard copper wire, including underpad cracking and silicon cratering, by the double-load wire bonding technology is discussed; this technology can minimize chip damage from

  11. Wire-bonder-assisted integration of non-bondable SMA wires into MEMS substrates

    NASA Astrophysics Data System (ADS)

    Fischer, A. C.; Gradin, H.; Schröder, S.; Braun, S.; Stemme, G.; van der Wijngaart, W.; Niklaus, F.

    2012-05-01

    This paper reports on a novel technique for the integration of NiTi shape memory alloy wires and other non-bondable wire materials into silicon-based microelectromechanical system structures using a standard wire-bonding tool. The efficient placement and alignment functions of the wire-bonding tool are used to mechanically attach the wire to deep-etched silicon anchoring and clamping structures. This approach enables a reliable and accurate integration of wire materials that cannot be wire bonded by traditional means.

  12. 30 CFR 75.1003-1 - Other requirements for guarding of trolley wires and trolley feeder wires.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Other requirements for guarding of trolley wires and trolley feeder wires. 75.1003-1 Section 75.1003-1...MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Trolley Wires and Trolley Feeder Wires §...

  13. 30 CFR 75.1003-1 - Other requirements for guarding of trolley wires and trolley feeder wires.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Other requirements for guarding of trolley wires and trolley feeder wires. 75.1003-1 Section 75.1003-1...MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Trolley Wires and Trolley Feeder Wires §...

  14. Using Diagram Generation Software to Improve Diagram Recognition: A Case Study of Music Notation

    Microsoft Academic Search

    Dorothea Blostein; Lippold Haken

    1999-01-01

    Diagrams are widely used in society to transmit information such as circuit designs, music, mathematical formulae, architectural plans, and molecular structure. Computers must process diagrams both as images (marks on paper) and as information. A diagram recognizer translates from image to information and a diagram generator translates from information to image. Current technology for diagram generation is ahead of the

  15. Arc tracking properties of the aging wires in aircraft

    Microsoft Academic Search

    Wang Yongxing; Dong Enyuan; Cong Jiyuan; Zou Jiyan; Dieter Koenig

    2008-01-01

    A modern commercial aircraft contains hundreds of miles of wiring. This vastly increased use of wiring, in conjunction with decreased insulation thickness, has increased the incidence of wire-related aircraft safety problems. Due to thermal, electrical, mechanical and chemical overstress, the aircraft wiring will be aged and the wire insulation will be decreased. Microscopic cracking occurs in wire insulation as the

  16. Pseudohaptic interaction with knot diagrams

    NASA Astrophysics Data System (ADS)

    Weng, Jianguang; Zhang, Hui

    2012-07-01

    To make progress in understanding knot theory, we need to interact with the projected representations of mathematical knots, which are continuous in three dimensions (3-D) but significantly interrupted in the projective images. One way to achieve such a goal is to design an interactive system that allows us to sketch two-dimensional (2-D) knot diagrams by taking advantage of a collision-sensing controller and explore their underlying smooth structures through a continuous motion. Recent advances of interaction techniques have been made that allow progress in this direction. Pseudohaptics that simulate haptic effects using pure visual feedback can be used to develop such an interactive system. We outline one such pseudohaptic knot diagram interface. Our interface derives from the familiar pencil-and-paper process of drawing 2-D knot diagrams and provides haptic-like sensations to facilitate the creation and exploration of knot diagrams. A centerpiece of the interaction model simulates a physically reactive mouse cursor, which is exploited to resolve the apparent conflict between the continuous structure of the actual smooth knot and the visual discontinuities in the knot diagram representation. Another value in exploiting pseudohaptics is that an acceleration (or deceleration) of the mouse cursor (or surface locator) can be used to indicate the slope of the curve (or surface) of which the projective image is being explored. By exploiting these additional visual cues, we proceed to a full-featured extension to a pseudohaptic four-dimensional (4-D) visualization system that simulates the continuous navigation on 4-D objects and allows us to sense the bumps and holes in the fourth dimension. Preliminary tests of the software show that main features of the interface overcome some expected perceptual limitations in our interaction with 2-D knot diagrams of 3-D knots and 3-D projective images of 4-D mathematical objects.

  17. Data management system CIU and DIU. Appendix A: CIU and DIU schematics

    NASA Technical Reports Server (NTRS)

    1975-01-01

    The Computer Interface Unit (CIU) and the Data Interface Unit (DIU) of the Data Management System (DMS) were described as to their functional location, purpose and function. This describes the CIU and DIU at the unit level illustrating their interface thru the Data Bus (DBUS) and to other DMS units. All unit level interfaces are defined as to function and characteristics. The controls, indicators, test points and connectors are listed and function, location and application are described for each. The mechanical configuration is defined and illustrated to provide card and component location for modification or repair purposes. Unique disassembly and assembly requirements are outlined where applicable. A unit internal functional block diagram level description is provided.

  18. Frequency response in short thermocouple wires

    NASA Astrophysics Data System (ADS)

    Forney, L. J.; Meeks, E. L.; Ma, J.; Fralick, G. C.

    1992-10-01

    Theoretical expressions are derived for the steady state frequency response of a thermocouple wire. In particular, the effects of axial heat conduction are demonstrated for a nonuniform wire with unequal material properties and wire diameters across the junction. The amplitude ratio at low frequency omega approaches 0 agrees with the results of Scadron and Warshawsky (1952) for a steady state temperature distribution. Moreover, the frequency response for a nonuniform wire in the limit of infinite length l approaches infinity is shown to reduce to a simple expression that is analogous to the classic first order solution for a thermocouple wire with uniform properties. Theoretical expressions are also derived for the steady state frequency response of a supported thermocouple wire. In particular, the effects of axial heat conduction are demonstrated for both a supported one material wire and a two material wire with unequal material properties across the junction. For the case of a one material supported wire, an exact solution is derived which compares favorably with an approximate expression that only matches temperatures at the support junction. Moreover, for the case of a two material supported wire, an analytical expression is derived that closely correlates numerical results. Experimental measurements are made for the steady state frequency response of a supported thermocouple wire. In particular, the effects of axial heat conduction are demonstrated for both a supported one material wire (type K) and a two material wire (type T) with unequal material properties across the junction. The data for the amplitude ratio and phase angle are correlated to within 10 pct. with the theoretical predictions of Forney and Fralick (1991). This is accomplished by choosing a natural frequency omega sub n for the wire data to correlate the first order response at large gas temperature frequencies. It is found that a large bead size, however, will increase the amplitude ratio at low frequencies but decrease the natural frequency of the wire. The phase angle data are also distorted for imperfect junctions.

  19. Frequency response in short thermocouple wires

    NASA Technical Reports Server (NTRS)

    Forney, L. J.; Meeks, E. L.; Ma, J.; Fralick, G. C.

    1992-01-01

    Theoretical expressions are derived for the steady state frequency response of a thermocouple wire. In particular, the effects of axial heat conduction are demonstrated for a nonuniform wire with unequal material properties and wire diameters across the junction. The amplitude ratio at low frequency omega approaches 0 agrees with the results of Scadron and Warshawsky (1952) for a steady state temperature distribution. Moreover, the frequency response for a nonuniform wire in the limit of infinite length l approaches infinity is shown to reduce to a simple expression that is analogous to the classic first order solution for a thermocouple wire with uniform properties. Theoretical expressions are also derived for the steady state frequency response of a supported thermocouple wire. In particular, the effects of axial heat conduction are demonstrated for both a supported one material wire and a two material wire with unequal material properties across the junction. For the case of a one material supported wire, an exact solution is derived which compares favorably with an approximate expression that only matches temperatures at the support junction. Moreover, for the case of a two material supported wire, an analytical expression is derived that closely correlates numerical results. Experimental measurements are made for the steady state frequency response of a supported thermocouple wire. In particular, the effects of axial heat conduction are demonstrated for both a supported one material wire (type K) and a two material wire (type T) with unequal material properties across the junction. The data for the amplitude ratio and phase angle are correlated to within 10 pct. with the theoretical predictions of Forney and Fralick (1991). This is accomplished by choosing a natural frequency omega sub n for the wire data to correlate the first order response at large gas temperature frequencies. It is found that a large bead size, however, will increase the amplitude ratio at low frequencies but decrease the natural frequency of the wire. The phase angle data are also distorted for imperfect junctions.

  20. The Quasar SED Mixing Diagram

    NASA Astrophysics Data System (ADS)

    Hao, Heng; Elvis, M.; Civano, F.

    2011-05-01

    We present a useful new diagram for characterizing the quasar-host-reddening mixture for AGN SEDs. This "mixing diagram" is based on a detailed study of 413 X-ray selected Type 1 AGN SEDs from the XMM-COSMOS Survey (Elvis, Hao, et al., 2011). The mixing diagram plots the near-IR (1-3micron) spectral slope against the optical (0.3-1micron) slope to form a generalized 'color-color' diagram. A pure AGN continuum (Elvis et al., 1994, E94) and pure host galaxies are located at clear and distinct positions on the mixing diagram. The lines joining them indicate the fraction of host contribution to each AGN. The reddening vector is almost perpendicular to these mixing lines, and so is easily measured independently. The mixing diagram shows that 90% of the AGNs lie on mixing curves between the mean E94 AGN SED and a host galaxy, with only modest reddening [E(B-V)=0.1-0.2] (Hao et al., 2011a). Lower luminosity and lower Eddington ratio AGNs have a larger host galaxy fraction, as expected. Optically selected samples (SDSS) have smaller host galaxy fractions. There is some intrinsic scatter around the E94 mean SED. A substantial minority, 10%, of the XMM-COSMOS AGNs are inconsistent with any AGN+host+reddening mix. These AGNs have weak or non-existent near-IR bumps, suggesting a lack of the hot dust characteristic of AGNs (Hao et al., 2010). A similar fraction of these "hot dust poor" (HDP) quasars are found in the Elvis et al. 1994 (BQS) and Richards et al. 2006 (SDSS) samples (Hao et al., 2011b). The fraction of "hot dust poor" AGNs grows to 20% at z>2 (Hao et al. 2010). The proposed 'cosmic cycle' of SMBH and galaxy co-evolution (e.g. Hopkins et al., 2006) can be shown as tracks on the mixing diagram. The mixing diagram definition could also be expanded to other wavelengths.

  1. Figure S1.Technical diagram of the 1-by-3 tandem differential mobility analyzer (cf. schematic diagram shown in Figure 1). Relative humidity sensors are located at positions RH,

    E-print Network

    the evolution of the number size distribution of sodium chloride particles inside the 1×3-TDMA. The three columns respectively show the distribution at RH0 prior to entering DMAmono (cf. Figure 1), after exiting mobility diameter. Distributions having aqueous particles are shown in red and those having solid particles

  2. Wire Crimp Connectors Verification using Ultrasonic Inspection

    NASA Technical Reports Server (NTRS)

    Cramer, K. Elliott; Perey, Daniel F.; Yost, William T.

    2007-01-01

    The development of a new ultrasonic measurement technique to quantitatively assess wire crimp connections is discussed. The amplitude change of a compressional ultrasonic wave propagating through the junction of a crimp connector and wire is shown to correlate with the results of a destructive pull test, which previously has been used to assess crimp wire junction quality. Various crimp junction pathologies (missing wire strands, incorrect wire gauge, incomplete wire insertion in connector) are ultrasonically tested, and their results are correlated with pull tests. Results show that the ultrasonic measurement technique consistently (as evidenced with pull-testing data) predicts good crimps when ultrasonic transmission is above a certain threshold amplitude level. A physics-based model, solved by finite element analysis, describes the compressional ultrasonic wave propagation through the junction during the crimping process. This model is in agreement within 6% of the ultrasonic measurements. A prototype instrument for applying the technique while wire crimps are installed is also presented.

  3. Wire diameter and length effects on wire sweep performance of multi-tier copper and gold wire bonding in plastic ball grid array packages

    Microsoft Academic Search

    Serene Teh Seoh Hian; Foong Chee Seng; Teng Seng Kiong; Navas Khan Oratti Kalandar

    2011-01-01

    As the semiconductor packaging industry continues to lower its manufacturing costs, concerted efforts in the supply chain focusing on using copper (Cu) as wire bond interconnects has intensified to an unprecedented level. In our previous study we showed that Cu wire has significantly higher wire sweep compared to gold (Au) wire after molding. In this study, wire sweep performance was

  4. Charge state of the fast gate in chloride channels: Insights from electrostatic calculations in a schematic model

    NASA Astrophysics Data System (ADS)

    Wijesinghe, Rajiv; Coorey, Nathan; Kuyucak, Serdar

    2007-11-01

    Fast gating is a unique property of chloride channels, where a permeating Cl- ion acts as its own ligand in opening the channel. The glutamate residue implicated in fast gating normally carries a unit negative charge. Whether this charge needs to be protonated to enable permeation of a Cl- ion is an important question that will affect how models of chloride channels are constructed. We investigate the energetic consequences of the charge state of this glutamate residue from continuum electrostatics using a schematic cylindrical channel model. Both analytical solutions of the Poisson equation for an infinite cylinder and numerical ones for a finite cylinder are employed in the calculations.

  5. INCONEL 718: A solidification diagram

    Microsoft Academic Search

    G. A. Knorovsky; M. J. Cieslak; T. J. Headley; A. D. Romig; W. F. Hammetter

    1989-01-01

    As part of a program studying weldability of Ni-base superalloys, results of an integrated analytical approach are used to generate a constitution diagram for INCONEL 718* in the temperature range associated with solidification. Differential thermal analysis of wrought material and optical and scanning electron microscopy, electron probe microanalysis, and analytical electron microscopy of gas tungsten arc welds are used in

  6. Venn Diagram Warm-Up

    NSDL National Science Digital Library

    M Johnson

    2013-10-02

    This response answers a posted question, "What is your favorite warm-up suited for all grade levels?". The response details a Venn Diagram warm-up that can be used with any grade level and modified to fit most math topics.

  7. Causal diagrams for empirical research

    Microsoft Academic Search

    JUDEA PEARL

    1995-01-01

    The primary aim of this paper is to show how graphical models can be used as a mathematical language for integrating statistical and subject-matter information. In particular, the paper develops a principled, nonparametric framework for causal inference, in which diagrams are queried to determine if the assumptions available are sufficient for identifying causal effects from nonexperimental data. If so the

  8. Voronoi Diagrams and Spring Rain

    ERIC Educational Resources Information Center

    Perham, Arnold E.; Perham, Faustine L.

    2011-01-01

    The goal of this geometry project is to use Voronoi diagrams, a powerful modeling tool across disciplines, and the integration of technology to analyze spring rainfall from rain gauge data over a region. In their investigation, students use familiar equipment from their mathematical toolbox: triangles and other polygons, circumcenters and…

  9. Index of Animated Phase Diagrams

    NSDL National Science Digital Library

    Kenneth E Windom

    This is a collection of animated phase diagrams by Kenneth Windom at Iowa State University. These short Power Point animations can be used to illustrate equilibrium crystallization concepts. There are slide shows for plagioclase feldspars (albite and anorthite); forsterite, diopside and anorthite; forsterite, enstatite and silica; and diopside and anorthite.

  10. ccsd00000445, Making diagrams speak,

    E-print Network

    raised by the presence of diagrams in a VIIth century Sanskrit mathematical com- mentary. Exploring di- agrammes dans un commentaire math#19;ematique en langue sanskrite datant du VII#18;eme si#18;ecle: A. Keller is a French CNRS researcher working on medieval sanskrit mathematics but also

  11. Reduced-Wiring Tactile Sensor

    NASA Technical Reports Server (NTRS)

    Ohm, Timothy R.

    1991-01-01

    Proposed tactile sensor on robot finger puts out multiplexed analog signals transmitted to control computer on fewer wires than needed to transmit equivalent digital signals. Analog output represents data on contact area of object being gripped, on position of object, and on direction and rate of slippage if any. Consists of chains of normally open switches and resistors on surface of finger. Each resistance double preceding resistance in each chain. Constant-current sources supply power to chains.

  12. Wiring the new COMPASS Drift Chamber

    NASA Astrophysics Data System (ADS)

    Medlock, Lacey; Compass Dc5 Team

    2014-09-01

    COMPASS, a fixed-target experiment at CERN, will examine the first ever polarized Drell-Yan events that may illuminate how the quark angular momentum contributes to the spin of the proton. A new drift chamber must be constructed to replace an older straw chamber that is currently in use. In order to construct the drift chamber 4616 gold-plated tungsten wires are used, half are 100 micron (field wires) which provide an electrical field and half are 20 micron (sense wires) which measure position. Because of the difference in wire width, two very different stringing techniques had to be developed. The 20 micron sense wire was too fragile and thin to be handled in the same manner as the 100 micron field wire, so different tools had to be used in order to ensure the stability and efficacy of the chamber. Additionally, different soldering techniques had to be used for the two different types of wires to guarantee both that the field wires did not slip out of their solder joints during the process of stringing the sense wires and that both types of wires had smooth, even solder joints that would not require repair. This poster will detail several aspects of wire stringing, including how to string different widths of wire and how to overcome difficulties arising from using two different types of wire during the stringing process. COMPASS, a fixed-target experiment at CERN, will examine the first ever polarized Drell-Yan events that may illuminate how the quark angular momentum contributes to the spin of the proton. A new drift chamber must be constructed to replace an older straw chamber that is currently in use. In order to construct the drift chamber 4616 gold-plated tungsten wires are used, half are 100 micron (field wires) which provide an electrical field and half are 20 micron (sense wires) which measure position. Because of the difference in wire width, two very different stringing techniques had to be developed. The 20 micron sense wire was too fragile and thin to be handled in the same manner as the 100 micron field wire, so different tools had to be used in order to ensure the stability and efficacy of the chamber. Additionally, different soldering techniques had to be used for the two different types of wires to guarantee both that the field wires did not slip out of their solder joints during the process of stringing the sense wires and that both types of wires had smooth, even solder joints that would not require repair. This poster will detail several aspects of wire stringing, including how to string different widths of wire and how to overcome difficulties arising from using two different types of wire during the stringing process. This research was supported in part by the DOE under Grant Number DE-FG03-94ER40860.

  13. Thermal energy scavenger (rotating wire modules)

    SciTech Connect

    Hochstein, P.A.; Milton, H.W.; Pringle, W.L.

    1980-11-04

    A thermal energy scavenger assembly is is described including a plurality of temperature-sensitive wires made of material which exhibits shape memory due to a thermoelastic, martensitic phase transformation. The wires are placed in tension between fixed and movable plates which are, in turn, supported by a pair of wheels which are rotatably supported by a housing for rotation about a central axis. A pair of upper and lower cams are fixed to the housing and cam followers react with the respective cams. Each cam transmits forces through a pair of hydraulic pistons. One of the pistons is connected to a movable plate to which one end of the wires are connected whereby a stress is applied to the wires to strain the wires during a first phase and whereby the cam responds to the unstraining of the wires during a second phase. A housing defines fluid compartments through which hot and cold fluid passes and flows radially through the wires whereby the wires become unstrained and shorten in length when subjected to the hot fluid for causing a reaction between the cam followers and the cams to effect rotation of the wheels about the central axis of the assembly, which rotation of the wheels is extracted through beveled gearing. The wires are grouped into a plurality of independent modules with each module having a movable plate, a fixed plate and the associated hydraulic pistons and cam follower. The hydraulic pistons and cam follower of a module are disposed at ends of the wires opposite from the ends of the wires at which the same components of the next adjacent modules are disposed so that the cam followers of alternate modules react with one of the cams and the remaining cam followers of the remaining modules react with the other cam. There is also included stress limiting means in the form of coil springs associated with alternate ends of the wires for limiting the stress or strain in the wires.

  14. Collectivity of the pygmy dipole resonance within schematic Tamm-Dancoff approximation and random-phase approximation models

    NASA Astrophysics Data System (ADS)

    Baran, V.; Palade, D. I.; Colonna, M.; Di Toro, M.; Croitoru, A.; Nicolin, A. I.

    2015-05-01

    Within schematic models based on the Tamm-Dancoff approximation and the random-phase approximation with separable interactions, we investigate the physical conditions that may determine the emergence of the pygmy dipole resonance in the E 1 response of atomic nuclei. By introducing a generalization of the Brown-Bolsterli schematic model with a density-dependent particle-hole residual interaction, we find that an additional mode will be affected by the interaction, whose energy centroid is closer to the distance between two major shells and therefore well below the giant dipole resonance (GDR). This state, together with the GDR, exhausts all the transition strength in the Tamm-Dancoff approximation and all the energy-weighted sum rule in the random-phase approximation. Thus, within our scheme, this mode, which could be associated with the pygmy dipole resonance, is of collective nature. By relating the coupling constants appearing in the separable interaction to the symmetry energy value at and below saturation density we explore the role of density dependence of the symmetry energy on the low-energy dipole response.

  15. MULTI-TERMINAL BINARY DECISION DIAGRAMS AND

    E-print Network

    Clarke, Edmund M.

    . Bryant and Chen have proposed binary moment diagrams (BMDs) for rep- resenting the class of functions with several hundred variables. Recently, Bryant and Chen [5] have proposed binary moment diagrams (BMDs

  16. Wire ablation dynamics model and its application to imploding wire arrays of different geometries.

    PubMed

    Esaulov, A A; Kantsyrev, V L; Safronova, A S; Velikovich, A L; Shrestha, I K; Williamson, K M; Osborne, G C

    2012-10-01

    The paper presents an extended description of the amplified wire ablation dynamics model (WADM), which accounts in a single simulation for the processes of wire ablation and implosion of a wire array load of arbitrary geometry and wire material composition. To investigate the role of wire ablation effects, the implosions of cylindrical and planar wire array loads at the university based generators Cobra (Cornell University) and Zebra (University of Nevada, Reno) have been analyzed. The analysis of the experimental data shows that the wire mass ablation rate can be described as a function of the current through the wire and some coefficient defined by the wire material properties. The aluminum wires were found to ablate with the highest rate, while the copper ablation is the slowest one. The lower wire ablation rate results in a higher inward velocity of the ablated plasma, a higher rate of the energy coupling with the ablated plasma, and a more significant delay of implosion for a heavy load due to the ablation effects, which manifest the most in a cylindrical array configuration and almost vanish in a single-planar array configuration. The WADM is an efficient tool suited for wire array load design and optimization in wide parameter ranges, including the loads with specific properties needed for the inertial confinement fusion research and laboratory astrophysics experiments. The data output from the WADM simulation can be used to simplify the radiation magnetohydrodynamics modeling of the wire array plasma. PMID:23214697

  17. Pressure-enthalpy diagrams for alternative refrigerants

    Microsoft Academic Search

    J. Chen; H. Kruse

    1996-01-01

    Thermodynamic diagrams, particularly log(p)-h diagrams, have become very convenient tools for refrigeration and air-conditioning industries. To promote alternative refrigerants-related development and application, it is urgently required to provide the industries with reliable engineering diagrams for the most promising candidate refrigerants. A computer program has been developed for automatically producing log(p)-h diagrams for alternative refrigerants. The Lee Kesler Ploecker (LKP) equation

  18. guidelines for binary phase diagram assessment

    Microsoft Academic Search

    H. Okamoto; T. B. Massalski

    1993-01-01

    The recent publication of Binary Alloy Phase Diagrams,2nd ed, [90Mas] and our extensive screening of phase diagram graphics\\u000a for this edition has revealed many phase diagram features, which while not explicitly violating phase diagram rules, are to\\u000a a lesser or greater extent unlikely to represent thermodynamically acceptable conditions. In two previous papers, several\\u000a thermodynamically improbable features or boundaries in binary

  19. Phase diagram of trivalent and pentavalent patchy particles This article has been downloaded from IOPscience. Please scroll down to see the full text article.

    E-print Network

    Sciortino, Francesco

    of structures (micelles [9], wires, sheets [12] or two- [11], and three-dimensional crystals) arising from-density crystal structures which compete with the fluid phase. The phase diagram of the five-patch model shows re and a stable, high-density liquid. The three-patch model shows a stable gas­liquid critical point and

  20. The Butterfly Diagram Internal Structure

    NASA Astrophysics Data System (ADS)

    Ternullo, Maurizio

    2013-06-01

    A time-latitude diagram, where the spotgroup area is taken into account, is presented for cycles 12 through 23. The results show that the spotted area is concentrated in few, small portions ("knots") of the Butterfly Diagram (BD). The BD may be described as a cluster of knots. Knots are distributed in the butterfly wings in a seemingly randomly way. A knot may appear at either lower or higher latitudes than previous ones, in spite of the prevalent tendency to appear at lower and lower latitudes. Accordingly, the spotted area centroid, far from continuously drifting equatorward, drifts poleward or remains stationary in any hemisphere for significant fractions (? 1/3) of the cycle total duration. In a relevant number of semicycles, knots seem to form two roughly parallel, oblique "chains", separated by an underspotted band. This picture suggests that two (or more) "activity streams" approach the equator at a rate higher than the spot zone as a whole.

  1. Arrows in Comprehending and Producing Mechanical Diagrams

    ERIC Educational Resources Information Center

    Heiser, Julie; Tversky, Barbara

    2006-01-01

    Mechanical systems have structural organizations--parts, and their relations--and functional organizations--temporal, dynamic, and causal processes--which can be explained using text or diagrams. Two experiments illustrate the role of arrows in diagrams of mechanical systems. In Experiment 1, people described diagrams with or without arrows,…

  2. DRAWING ENVIRONMENT DIAGRAMS COMPUTER SCIENCE 61A

    E-print Network

    California at Berkeley, University of

    line at a time. 1 #12;DISCUSSION : DRAWING ENVIRONMENT DIAGRAMS Page 2 0.3 When you EncounterDRAWING ENVIRONMENT DIAGRAMS COMPUTER SCIENCE 61A February 6, 2013 0.1 Background · A frame frames will not end up with frame numbers. 0.2 Starting Your Diagram · First draw the global frame

  3. Treatment of Diagrams in Document Image Analysis

    Microsoft Academic Search

    Dorothea Blostein; Edward Lank; Richard Zanibbi

    2000-01-01

    Document image analysis is the study of converting documents from paper form to an electronic form that captures the information content of the document. Necessary processing includes recognition of document layout (to determine reading order, and to distinguish text from diagrams), recognition of text (called Optical Character Recognition, OCR), and processing of diagrams and photographs. The processing of diagrams has

  4. Generating Textual Diagrams and Diagrammatic Texts

    Microsoft Academic Search

    Donia Scott; Richard Power

    1998-01-01

    Abstract. There are obvious ways in which text and diagrams within a document should be coordinated: for instance, the placement of a diagram might influence the wording of the text. However, there is a more subtle interaction between text and diagrams, which has emerged from work on generating technical documents,that make extensive use of layout. Constituents that would normally be

  5. Causal Reasoning with Neuron Diagrams Martin Erwig

    E-print Network

    Erwig, Martin

    Causal Reasoning with Neuron Diagrams Martin Erwig Oregon State University erwig- losophy for over two millennia. Modern philosophers often rely on "neuron diagrams", a domain itself. In this paper we formalize the syntax and semantics of neuron diagrams. We discuss existing

  6. Constant life diagrams — a historical review

    Microsoft Academic Search

    G. P. Sendeckyj

    2001-01-01

    A historical review of the early development of constant life diagrams (variously referred to as Goodman, Smith, Haigh, etc. diagrams) is presented. It is shown that there were two distinct approaches to the formulation of constant life diagrams for fatigue design purposes. The first one was based on Wöhler's fatigue experiments and involved engineering curve fits of the fatigue endurance

  7. Interactive Exploration of UML Sequence Diagrams

    Microsoft Academic Search

    Richard Sharp; Atanas Rountev

    2005-01-01

    Sequence diagrams are commonly used to represent ob- ject interactions in software systems. Reverse-engineered sequence diagrams, which are constructed from existing code, are becoming widely available to more program- mers through modern commercial and research UML tools. However, due to their large size and inefficient spatial de- sign, such diagrams can easily become useless. We discuss the visual limitations of

  8. Integrating Model Information in UML Sequence Diagrams

    Microsoft Academic Search

    Aliki Tsiolakis

    2001-01-01

    In a UML model, dierent aspects of a system are covered by dierent types of diagrams. Nevertheless, it is important to provide means to check the consistency and completeness of the UML model. This problem is addressed in this paper by integrating the information specified in class and statechart diagrams into se- quence diagrams. The representation as constraints attached to

  9. Monitoring with Behavior View Diagrams for Debugging

    Microsoft Academic Search

    Donglin Liang; Kai Xu

    2005-01-01

    UML sequence diagrams are widely used during require- ments analysis and design for specifying the expected mes- sage exchanges among a set of objects in various scenarios for the program to perform a certain task. In this paper, we present the behavior view diagrams, a type of extended se- quence diagrams, to facilitate execution monitoring durin g debugging. Using a

  10. Designing UML diagrams for technical documentation

    Microsoft Academic Search

    Neil MacKinnon; Steve Murphy

    2003-01-01

    This paper presents a framework for improving the presentation of Unified Modeling Language (UML) diagrams, as applied in technical documentation produced at the IBM Toronto Software Laboratory. UML diagrams are a key part of program design. They can enhance understanding of complex programming concepts, and assist in problem analysis and solution design. In turn, UML diagrams can add significant value

  11. A Layout Algorithm for Data Flow Diagrams

    Microsoft Academic Search

    Carlo Batini; Enrico Nardelli; Roberto Tamassia

    1986-01-01

    A layout algorithm is presented that allows the automatic drawing of data flow diagrams, a diagrammatic representation widely used in the functional analysis of information systems. A grid standard is defined for such diagrams, and aesthetics for a good readability are identified. The layout algorithm receives as input an abstract graph, specifying connectivity relations between the elements of the diagram,

  12. Signal propagation in long wire chambers

    NASA Astrophysics Data System (ADS)

    Bock, P.; Engelfried, J.; Friedrich, T.; Heintze, J.; Lennert, P.; Russ, M.; Zimmer, M.

    2012-09-01

    The propagation of signals in long proportional counters or multi-wire tracking chambers is simulated, using numerical solutions of the multi-wire telegraph equations. The results are compared to experimental data, recorded with a proportional counter and a multi-wire test chamber. The signal shape, the charge division ratio and, in the case of the drift chamber, also the cross talk between the wires, are well reproduced. Similar shapes for signals and their cross talk can be obtained with a properly chosen electrical termination. It is shown how data from a multi-wire chamber can then be corrected for cross talk. The effects limiting the precision of position measurements along the wires with the charge division method are discussed. The simulation was applied to the reconstruction of tracks measured with the OPAL JET chamber.

  13. Phase diagram of coupled ladders

    Microsoft Academic Search

    T. F. A. Müller; T. M. Rice

    1998-01-01

    The two-leg t-J ladder forms a spin liquid at half filling that evolves to a Luther-Emery liquid upon doping. Our aim is to obtain a complete phase diagram for isotropic coupling (i.e., rungs and legs equal) as a function of electron density n and the ratio J\\/t. Two known limiting cases are n<12, which is a single band Luttinger liquid,

  14. Reasoning on UML class diagrams

    Microsoft Academic Search

    Daniela Berardi; Diego Calvanese; Giuseppe De Giacomo

    2005-01-01

    UML is the de-facto standard formalism for software design and analysis. To sup- port the design of large-scale industrial applications, sophisticated CASE tools are available on the market, that provide a user-friendly environment for editing, stor- ing, and accessing multiple UML diagrams. It would be highly desirable to equip such CASE tools with automated reasoning capabilities, such as those studied

  15. INCONEL 718: A solidification diagram

    Microsoft Academic Search

    G. A. Knorovsky; M. J. Cieslak; T. J. Headley; A. D. Romig; W. F. Hammetter

    1989-01-01

    As part of a program studying weldability of Ni-base superalloys, results of an integrated analytical approach are used to\\u000a generate a constitution diagram for INCONEL 718* in the temperature range associated with solidification. Differential thermal analysis of wrought material and optical and\\u000a scanning electron microscopy, electron probe microanalysis, and analytical electron microscopy of gas tungsten arc welds are\\u000a used in

  16. Printed wiring board design and manufacture in Electronic Instrumentation Department 8450

    SciTech Connect

    Hardin, D.J.; Schoeppe, H.E.; Franssen, R.L.; Kirchner, G.W. (Sandia National Labs., Livermore, CA (United States))

    1991-05-01

    In order to successfully and efficiently produce printed wiring boards, the full progression from design concept through fabrication must be understood. Within Department 8450, this includes the utilization of Valid Logic Systems Computer-Aided Engineering (CAE) tools to perform schematic capture, circuit simulation, and board layout. If the appropriate functions are not performed in the proper sequence, or if the essential materials are not available when needed, the time required to produce a printed wiring board will grow inordinately. This report details the process flow within Department 8450, starting with the initial design requirements and concluding with a completely fabricated and tested circuit board. Recommendations for improving the system are also presented. Design are manufacturing considerations that impact the process are identified, as are the input and output requirements for each stage. With this information as a guide, a design engineer will be able to utilize the CAE tools available for circuit board design more effectively and minimize the time interval from concept to final product. 10 figs.

  17. Bobbin stresses generated by wire winding

    SciTech Connect

    Metzinger, K.; Attaway, S.; Mello, F.

    1991-01-01

    The prediction of bobbin stresses generated by wire winding is now possible by combining a finite element structural code and a rigid body motion code. In this combination of computer codes, the bobbin and the individual wire wraps are considered to be axisymmetric. Each wire wrap is modeled with a single one-node element that has stiffness, mass and radius. The distributed radial load that a wire wrap exerts on the bobbin or other wires is calculated by using a relationship developed for a thin ring with a circular cross section. In this analysis, a layer of wire wraps with a specified tension is applied to a bobbin. The bobbin contracts radially until an equilibrium position is reached. When a second layer is added, the bobbin and each wire in the first layer reach a new equilibrium position. The tensions and the distributed radial loads associated with each displaced wire in the first layer change accordingly. As additional layers are added, the tensions and the distributed radial loads for all the previously applied wires are adjusted to reflect their new positions. The stresses in the bobbin can be determined for any number of wire layers. Bobbin fixturing during winding can be simulated by imposing suitable boundary conditions on the bobbin's finite element mesh. A simple test problem is presented, providing a comparison between the finite element results and a closed-form solution. Quantitative results for bobbin stresses and wire tensions and then presented for more realistic coils. The impact of bobbin fixturing and wire packing structure on the stresses in the bobbin are also discussed. 3 refs.

  18. Gold wire bonding onto flexible polymeric substrates

    Microsoft Academic Search

    Elizabeth Hall; Alan M. Lyons; John D. Weld

    1995-01-01

    Copper clad polymeric materials were examined as potential substrates for wire bonded chip-on-flex circuits. New thermoplastic flex and a PTFE\\/woven glass substrate were evaluated along with polyimides using high temperature copper laminate adhesives and adhesiveless constructions. Initial wire bond pull tests indicated all the materials were suitable for high temperature gold wire bonding. Similarly, conventional glob top encapsulants were found

  19. Wrapped Wire Detects Rupture Of Pressure Vessel

    NASA Technical Reports Server (NTRS)

    Hunt, James B.

    1990-01-01

    Simple, inexpensive technique helps protect against damage caused by continuing operation of equipment after rupture or burnout of pressure vessel. Wire wrapped over area on outside of vessel where breakthrough most likely. If wall breaks or burns, so does wire. Current passing through wire ceases, triggering cutoff mechanism stopping flow in vessel to prevent further damage. Applied in other situations in which pipes or vessels fail due to overpressure, overheating, or corrosion.

  20. Nondestructive Evaluation of Aircraft and Spacecraft Wiring

    NASA Technical Reports Server (NTRS)

    White, John E.; Tucholski, Edward J.; Green, Robert E., Jr.

    2004-01-01

    Spacecraft, and especially aircraft, often fry well past their original design lives and, therefore, the need to develop nondestructive evaluation procedures for inspection of vital structures in these craft is extremely important. One of the more recent problems is the degradation of wiring and wiring insulation. The present paper describes several nondestructive characterization methods which afford the possibility to detect wiring and insulation degradation in-situ prior to major problems with the safety of aircraft and spacecraft.

  1. Class 180°C polyurethane magnet wire insulation

    Microsoft Academic Search

    J. J. Harber; R. J. Beeckman; D. F. Hobbs

    1997-01-01

    There has been increased customer interest in a Class 180°C magnet wire insulation which possesses the thermal wire properties of a Class 180°C solderable polyester-imide product (MW 77C), yet which has solderability characteristics of a conventional polyurethane insulation (MW 79, 80). A developed polymeric insulation fulfills this need for the fine wire market. The unique combination of properties of this

  2. 30 CFR 75.906 - Trailing cables for mobile equipment, ground wires, and ground check wires.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... false Trailing cables for mobile equipment, ground wires, and...906 Trailing cables for mobile equipment, ground wires, and...Provisions] Trailing cables for mobile equipment shall contain...circuit or other no less effective device approved by the Secretary...

  3. Diagram, a Learning Environment for Initiation to Object-Oriented Modeling with UML Class Diagrams

    ERIC Educational Resources Information Center

    Py, Dominique; Auxepaules, Ludovic; Alonso, Mathilde

    2013-01-01

    This paper presents Diagram, a learning environment for object-oriented modelling (OOM) with UML class diagrams. Diagram an open environment, in which the teacher can add new exercises without constraints on the vocabulary or the size of the diagram. The interface includes methodological help, encourages self-correcting and self-monitoring, and…

  4. Measuring the elastic properties of fine wire.

    PubMed

    Fallen, C T; Costello, J; Crawford, G; Schmidt, J A

    2001-01-01

    The elastic moduli of fine wires made from MP35N and 304SS used in implantable biomedical devices are assumed to be the same as those published in the literature. However, the cold working required to manufacture the wire significantly alters the elastic moduli of the material. We describe three experiments performed on fine wire made from MP35N and 304SS. The experimentally determined Young's and shear modulus of both wire types were significantly less than the moduli reported in the literature. Young's modulus differed by as much as 26%, and the shear modulus differed by as much as 14% from reported values. PMID:11745523

  5. Adjustable Bracket For Entry Of Welding Wire

    NASA Technical Reports Server (NTRS)

    Gilbert, Jeffrey L.; Gutow, David A.

    1993-01-01

    Wire-entry bracket on welding torch in robotic welding system provides for adjustment of angle of entry of welding wire over range of plus or minus 30 degrees from nominal entry angle. Wire positioned so it does not hide weld joint in view of through-the-torch computer-vision system part of robot-controlling and -monitoring system. Swiveling bracket also used on nonvision torch on which wire-feed-through tube interferes with workpiece. Angle simply changed to one giving sufficient clearance.

  6. Temperature measurement of fine wires by photothermal radiometry

    Microsoft Academic Search

    T. Borca-Tasciuc; G. Chen

    1997-01-01

    Wire drawing is a common industrial process and in situ temperature measurement techniques can be used for the quality control of the process. The temperature measurement of wire-type materials, however, is not easy because of ~1! the small diameter of the wire and ~2! the wire motion and vibration during the drawing process. Due to the motion of the wire,

  7. The technology of testing the safety of steel wire ropes

    Microsoft Academic Search

    Xiaochun Zhang; Caiwen Hu

    2005-01-01

    To estimate the security of steel wire rope, the broken wire condition, the capability of the rope to bear weight and the state of stress balance of each wire in the steel wire rope were investigated. The wavelet translation method was applied to analyze the signals of magnetic field leakage from the steel wire rope. The result of the time-frequency

  8. Processing a printed wiring board by single bath electrodeposition

    DOEpatents

    Meltzer, Michael P. (Oakland, CA); Steffani, Christopher P. (Livermore, CA); Gonfiotti, Ray A. (Livermore, CA)

    2010-12-07

    A method of processing a printed wiring board. Initial processing steps are implemented on the printed wiring board. Copper is plated on the printed wiring board from a bath containing nickel and copper. Nickel is plated on the printed wiring board from a bath containing nickel and copper and final processing steps are implemented on the printed wiring board.

  9. Processing A Printed Wiring Board By Single Bath Electrodeposition

    DOEpatents

    Meltzer, Michael P. (Oakland, CA); Steffani, Christopher P. (Livermore, CA); Gonfiotti, Ray A. (Livermore, CA)

    2003-04-15

    A method of processing a printed wiring board by single bath electrodeposition. Initial processing steps are implemented on the printed wiring board. Copper is plated on the printed wiring board from a bath containing nickel and copper. Nickel is plated on the printed wiring board from the bath containing nickel and copper and final processing steps are implemented on the printed wiring board.

  10. Developments in fine pitch copper wire bonding production

    Microsoft Academic Search

    Bob Chylak

    2009-01-01

    Copper wire bonding has huge cost advantages over gold wire bonding. Wire bonding and materials companies have invested heavily in R&D in the last 2 or 3 years and are starting to see the fruits of their labor. Low pin count, heavy wire packages have already been converted to copper wire and many companies are in high volume production. An

  11. Quantitative Inspection of Broken Wire in Wire Ropes: Method and Apparatus.

    PubMed

    Hongjian; Kechong; Shuzi

    1996-01-01

    This paper introduces a complete system for automatic inspecting broken wire in wire ropes. The development of this technique is reviewed. It is followed by a description of the hardware and software of the apparatus. The hardware uses magnetic concentrators and Hall effect sensors. Signal analysis is based on wavelet processing. Quantitative identification of broken wire in wire ropes is based on a pattern recognition approach of the neural network. PMID:10602576

  12. Transport Through Carbon Nanotube Wires

    NASA Technical Reports Server (NTRS)

    Anantram, M. P.; Yan, Jerry (Technical Monitor)

    2000-01-01

    This viewgraph presentation gives an overview of the the current carrying capacity of nanotube wires. Information is given on the motivation for the research, models and assumptions, Bragg reflection and Zener tunneling effects, and the influence of defects. Results show that dI/dv versus V does not increase in a manner commensurate with the increase in the number of subbands; in small diameter nanotubes, Zener tunneling is ineffective; Zener tunneling contributes to current with increase in nanotube diameter; and the increase in dI/dV with bias is much smaller than the increase in the number of subbands.

  13. Wired.

    ERIC Educational Resources Information Center

    Conklin, Aaron R.

    1998-01-01

    Discusses technology's impact on scoreboard design: the development of the light-emitting diode (LED) display. How the LED system works is explained, as are the advantages and disadvantages of LED compared with incandescent lamp boards. Final comments address deciding on materials for scoreboard casings. (GR)

  14. Wired

    NASA Astrophysics Data System (ADS)

    Carlowicz, Michael

    Every American grade school and library ought to have free access to the Internet, and universities and institutions ought to have better access, according to the Clinton Administration.In an October 10 speech in Knoxville, Tennessee, President Clinton proposed that all of the nation's 100,000 public schools and 9,000 libraries receive a two-tiered E-rate (education rate) for access to Internet services. All schools and libraries should receive basic connections for free, as well as deep discounts on video conferencing and highspeed connections (with prices influenced by how much the school can afford to pay). The basic connections (and part of the cost of the more sophisticated connections) would be paid from a special federal fund that currently provides below-cost phone service to households in poor and rural areas. That fund is currently drawn from fees assessed on local and long-distance telephone providers; the Clinton Administration would have cable operators and cellular service providers contribute as well. Companies that provide Internet services would be paid at the best available commercial rate.

  15. Optimization of Stranded-Wire Windings and Comparison with Litz Wire on the Basis of Cost and Loss.

    E-print Network

    -evident that the individual copper strands that constitute litz wire should be insulated to prevent circulating currents and to effect the function of litz wire in reducing losses, stranded wire with uninsulated strands, which we of litz wire in [2]. Previous work on loss calculation in stranded wire is reviewed in Section I

  16. 78 FR 7452 - Steel Wire Garment Hangers From Vietnam; Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-01

    ...731-TA-1198 (Final)] Steel Wire Garment Hangers From Vietnam; Determinations...injured by reason of imports of steel wire garment hangers from Vietnam, provided for in...antidumping duty orders on steel wire garment hangers from...

  17. 30 CFR 56.12053 - Circuits powered from trolley wires.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Electricity § 56.12053 Circuits powered from trolley wires. Ground wires for lighting circuits powered from trolley wires...

  18. 30 CFR 56.12053 - Circuits powered from trolley wires.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Electricity § 56.12053 Circuits powered from trolley wires. Ground wires for lighting circuits powered from trolley wires...

  19. 30 CFR 56.12053 - Circuits powered from trolley wires.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...DEPARTMENT OF LABOR METAL AND NONMETAL MINE SAFETY AND HEALTH SAFETY AND HEALTH STANDARDS-SURFACE METAL AND NONMETAL MINES Electricity § 56.12053 Circuits powered from trolley wires. Ground wires for lighting circuits powered from trolley wires...

  20. Stiffness Corrections for the Vibration Frequency of a Stretched Wire

    ERIC Educational Resources Information Center

    Hornung, H. G.; Durie, M. J.

    1977-01-01

    Discusses the need of introducing corrections due to wire stiffness arising from end constraints and wire axis distribution curvature in the measurement of ac electrical frequency by exciting transverse standing waves in a stretched steel wire. (SL)

  1. Wiring harnesses documented by punched-card technique

    NASA Technical Reports Server (NTRS)

    Hicks, W. W.; Kloezeman, W. G.

    1970-01-01

    Cards representing a connector are punched, sorted, and then used to printout wiring documentation for that connector. When wiring changes are made, new cards are punched and the wiring documentation is reprinted to reflect the latest configuration.

  2. 30 CFR 77.701-3 - Grounding wires; capacity.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...MINES Grounding § 77.701-3 Grounding wires; capacity. Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if: (a)...

  3. 30 CFR 77.701-3 - Grounding wires; capacity.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...MINES Grounding § 77.701-3 Grounding wires; capacity. Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if: (a)...

  4. 30 CFR 77.701-3 - Grounding wires; capacity.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...MINES Grounding § 77.701-3 Grounding wires; capacity. Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if: (a)...

  5. 30 CFR 77.701-3 - Grounding wires; capacity.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...MINES Grounding § 77.701-3 Grounding wires; capacity. Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if: (a)...

  6. 30 CFR 77.701-3 - Grounding wires; capacity.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...MINES Grounding § 77.701-3 Grounding wires; capacity. Where grounding wires are used to ground metallic sheaths, armors, conduits, frames, casings, and other metallic enclosures, such grounding wires will be approved if: (a)...

  7. 30 CFR 75.510 - Energized trolley wires; repair.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Energized trolley wires; repair. 75.510 Section...Equipment-General § 75.510 Energized trolley wires; repair. [Statutory Provisions] Energized trolley wires may be repaired only by a...

  8. 30 CFR 56.12050 - Installation of trolley wires.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Installation of trolley wires. 56.12050 Section 56.12050 Mineral...MINES Electricity § 56.12050 Installation of trolley wires. Trolley wires shall be installed at least seven feet...

  9. 30 CFR 75.510 - Energized trolley wires; repair.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Energized trolley wires; repair. 75.510 Section...Equipment-General § 75.510 Energized trolley wires; repair. [Statutory Provisions] Energized trolley wires may be repaired only by a...

  10. 30 CFR 57.12050 - Installation of trolley wires.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Installation of trolley wires. 57.12050 Section 57.12050 Mineral...and Underground § 57.12050 Installation of trolley wires. Trolley wires shall be installed at least seven feet...

  11. 30 CFR 57.12086 - Location of trolley wire.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Location of trolley wire. 57.12086 Section 57.12086 Mineral...Electricity Underground Only § 57.12086 Location of trolley wire. Trolley and trolley feeder wire shall be installed...

  12. 30 CFR 56.12050 - Installation of trolley wires.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Installation of trolley wires. 56.12050 Section 56.12050 Mineral...MINES Electricity § 56.12050 Installation of trolley wires. Trolley wires shall be installed at least seven feet...

  13. Phase diagram of coupled ladders

    Microsoft Academic Search

    T. F. A. Muller; T. M. Rice

    1998-01-01

    The 2-leg t-J ladder forms a spin liquid at half-filling which evolves to a\\u000aLuther-Emery liquid upon doping. Our aim is to obtain a complete phase diagram\\u000afor isotropic coupling (i.e. rungs and legs equal) as a function of electron\\u000adensity n and the ratio J\\/t (>0). Two known limiting cases are: n<1\\/2 which is\\u000aa single band Luttinger liquid

  14. Wire ageing with the TEA photocathode

    SciTech Connect

    Va`vra, J.

    1996-06-01

    Recently several RICH protypes successfully tested a gaseous TEA photocathode. However, its wire ageing behavior is unknown. In principle, TEA is a more strongly bonded molecule than TMAE, and, as a result, one would expect better wire ageing behavior. This paper explores this question.

  15. Ultrasonic aluminum wire bonding. Final report

    SciTech Connect

    Sim, J.R.

    1980-09-01

    An aluminum wire bonding process was developed. Techniques were developed for bonding large diameter wire to a power transistor and evaporated gold. Bond schedules were made to be used in producing hybrid microcircuits. Calibration techniques utilizing an elctromagnetic transducer to measure tool movement proved successful. The magnetic transducer is best suited as a trouble-shooting tool.

  16. The Eulerian buckling test for orthodontic wires

    Microsoft Academic Search

    R. De Santis; F. Dolci; A. Laino; R. Martina; L. Ambrosio; L. Nicolais

    2008-01-01

    SUMMARY Orthodontic treatment is mainly dependent on the loads developed by metal wires. The load developed by a buckled orthodontic wire is of great concern for molar distalization and cannot be simply derived from mechanical properties measured through classical tests (i.e. tensile, torsion, and bending). A novel testing method, based on the Eulerian approach of a simple supported beam, has

  17. The Compatible Technologies of Wire and Radio

    Microsoft Academic Search

    Ivan Coggeshall

    1962-01-01

    During the 50-year history of the Institute of Radio Engineers the respective technologies of wire and submarine cable telegraphy and telephony, on the one hand, and mobile and point-to-point radio, broadcasting, and television, on the other, have been commingled in an ever increasing degree. Initial contributions leading to the mutuality of the wire and radio branches of applied science came

  18. Stimulated emission in semiconductor quantum wire heterostructures

    Microsoft Academic Search

    E. Kapon; D. M. Hwang; R. Bhat

    1989-01-01

    We report the first observation of stimulated emission in quasi-one-dimensional semiconductor quantum wires. Amplified spontaneous emission and stimulated emission spectra of the GaAs\\/AlGaAs quantum wires exhibit fine structure arising from transitions between lateral, one-dimensional electron and hole subbands. The observed subband separations, ~10 meV, are consistent with the calculated ones.

  19. Coaxial Wiring Structures in Printed Circuit Boards

    Microsoft Academic Search

    Masahiro Aoyagi; Katsuya Kikuchi; K. Shibata; H. Nakagawa; S. Imai; T. Wada; H. Fujita

    2008-01-01

    We have developed a printed circuit board (PCB) technology with coaxial wiring structures. The coaxial PCB was designed for a prototype model in order to verify the high frequency and high-speed signal transmission characteristics of the coaxial wiring, where high frequency low loss dielectric material was used as insulation layer. It was fabricated by buildup PCB process, additionally using NC

  20. Technology update I: Wiring prognostic tools

    Microsoft Academic Search

    C. Teal; W. Larsen

    2003-01-01

    Current wire system inspection processes do not compliment aircraft electrical and electronic systems technology nor do many proposed or existing systems. The volt\\/ohm meter, the meg\\/ohm meter, and visual techniques can represent the wire inspection tools in common use today. These two meters only measure conductivity, connectivity, and voltage breakdown strength of the insulation. Visual techniques (mirror and flashlight methods)

  1. Butt welder for fine gage wire

    NASA Technical Reports Server (NTRS)

    Kabana, W. B.

    1970-01-01

    Device welds fine gage wire 0.001-in. in diameter. It permits welding of thermocouple junctions of the same size with straight sections adjacent to the junctions. Electrode arrangement provides constant pressure on the joint during welding while fully supporting the wires to prevent buckling or movement.

  2. Design Considerations for Wire Bonding Power Hybrids

    Microsoft Academic Search

    Gary Silverberg; Mike McKeown

    1997-01-01

    This paper will discuss the package design issues that Engineers should consider when developing a large aluminum wire wedge bonding process for use in power hybrid packages. With electronic power packages getting denser and thermal management more critical, the interconnection aspects must be fully proven and have higher reliability characteristics than ever before. Wire bonding is one of the main

  3. Crack mechanism in wire bonding joints

    Microsoft Academic Search

    S. Ramminger; P. Türkes; G. Wachutka

    1998-01-01

    High voltage and high current power modules are key components for traction applications. While the modules are exposed to harsh stress conditions all over their lifetime, high reliability is of decisive importance in this field of application. In power electronic packages wire bonding is used for the electrical interconnection from the chips to the output pins. Wire bond lift-off and

  4. Twisted Pair Of Insulated Wires Senses Moisture

    NASA Technical Reports Server (NTRS)

    Laue, Eric G.; Stephens, James B.

    1989-01-01

    Sensitivity of electronic moisture sensor to low levels of moisture increased by new electrode configuration. Moisture-sensing circuit described in "Low-Cost Humidity Sensor" (NPO-16544). New twisted pair of wires takes place of flat-plate capacitor in circuit. Configuration allows for thermal expansion and contraction of polymer while maintaining nearly constant area of contact between polymer and wires.

  5. Lansce Wire Scanning Diagnostics Device Mechanical Design

    SciTech Connect

    Rodriguez Esparza, Sergio [Los Alamos National Laboratory; Batygin, Yuri K. [Los Alamos National Laboratory; Gilpatrick, John D. [Los Alamos National Laboratory; Gruchalla, Michael E. [Los Alamos National Laboratory; Maestas, Alfred J. [Los Alamos National Laboratory; Pillai, Chandra [Los Alamos National Laboratory; Raybun, Joseph L. [Los Alamos National Laboratory; Sattler, F. D. [Los Alamos National Laboratory; Sedillo, James Daniel [Los Alamos National Laboratory; Smith, Brian G. [Los Alamos National Laboratory

    2011-01-01

    The Accelerator Operations & Technology Division at Los Alamos National Laboratory operates a linear particle accelerator which utilizes 110 wire scanning diagnostics devices to gain position and intensity information of the proton beam. In the upcoming LANSCE improvements, 51 of these wire scanners are to be replaced with a new design, up-to-date technology and off-the-shelf components. This document outlines the requirements for the mechanical design of the LANSCE wire scanner and presents the recently developed linac wire scanner prototype. Additionally, this document presents the design modifications that have been implemented into the fabrication and assembly of this first linac wire scanner prototype. Also, this document will present the design for the second, third, and fourth wire scanner prototypes being developed. Prototypes 2 and 3 belong to a different section of the particle accelerator and therefore have slightly different design specifications. Prototype 4 is a modification of a previously used wire scanner in our facility. Lastly, the paper concludes with a plan for future work on the wire scanner development.

  6. Tagging Herring With Coded-wire Microtags

    E-print Network

    Tagging Herring With Coded-wire Microtags KENNETH J. KRIEGER Introduction An efficient method of marking large numbers of herring. Clupea harengus, has application in separating stocks. de- scribing) ABSTRACT- A coded-wire microtag sys- tem can be used to tag Pacific herring. C1upea harengus pallasi. Adult

  7. Motion control of the accumulator flying wires

    SciTech Connect

    Wang, X.Q.

    1990-04-23

    Flying wire systems for the Fermilab Accumulator are being constructed in order to measure the transverse beam profiles during stacking. Each device passes a 25 micron carbon filament through the beam transversely at a constant velocity of 10 m/s. Collisions between the beam particles and the wire produce secondary particle cascades, which in turn produce photons in a scintillator. A photomultiplier tube is used to measure the light intensity while the wire position is determined by an optical encoder. There are six Accumulator flying wire systems. Four of them are to be used in normal stacking operation: two horizontal and two vertical flying wires are in the AP40 high dispersion section, covering the core orbit and the extraction orbit respectively. The other two horizontal wires are for measuring the momentum distribution of the beam on the central orbit at the Accumulator transition energy. At the AP40 high dispersion region a wire covers the central orbit, the other is in the AP30 low dispersion section. The operation and control of the flying wire system is discussed in this paper. 11 figs.

  8. Motion control of the accumulator flying wires

    Microsoft Academic Search

    1990-01-01

    Flying wire systems for the Fermilab Accumulator are being constructed in order to measure the transverse beam profiles during stacking. Each device passes a 25 micron carbon filament through the beam transversely at a constant velocity of 10 m\\/s. Collisions between the beam particles and the wire produce secondary particle cascades, which in turn produce photons in a scintillator. A

  9. LANSCE-R WIRE-SCANNER SYSTEM

    SciTech Connect

    Gruchalla, Michael E. [Los Alamos National Laboratory

    2011-01-01

    The National Instruments cRIO platform is used for the new LANSCE-R wire-scanner systems. All wire-scanner electronics are integrated into a single BiRa BiRIO 4U cRIO chassis specifically designed for the cRIO crate and all interface electronics. The BiRIO chassis, actuator and LabVIEW VIs provide a complete wire-scanner system integrated with EPICS. The new wire-scanner chassis includes an 8-slot cRIO crate with Virtex-5 LX 110 FPGA and Power-PC real-time controller, the LANL-developed cRIO 2-axis wire-sensor analog interface module (AFE), NI9222 cRIO 4-channel 16-bit digitizer, cRIO resolver demodulator, cRIO event receiver, front-panel touch panel display, motor driver, and all necessary software, interface wiring, connectors and ancillary components. This wirescanner system provides a complete, turn-key, 2-axis wire-scanner system including 2-channel low-noise sensewire interface with variable DC wire bias and wireintegrity monitor, 16-bit signal digitizers, actuator motor drive and control, actuator position sensing, limit-switch interfaces, event receiver, LabVIEW and EPICS interface, and both remote operation and full stand-alone operation using the touch panel.

  10. Wire-antenna designs using genetic algorithms

    Microsoft Academic Search

    Edward E. Altshuler; Derek S. Linden

    1997-01-01

    There is a large class of electromagnetic radiators designated as wire antennas. As a rule, an inductive process is used to design these antennas. Either an integral equation is formulated or a simulator is used that gives the current distributions on the wires of the antenna, from which the electromagnetic properties of the antenna can then be determined. Once the

  11. Method of preparing composite superconducting wire

    DOEpatents

    Verhoeven, John D. (Ames, IA); Gibson, Edwin D. (Ames, IA); Finnemore, Douglas K. (Ames, IA); Ostenson, Jerome E. (Ames, IA); Schmidt, Frederick A. (Ames, IA); Owen, Charles V. (Ames, IA)

    1985-08-06

    An improved method of preparing composite multifilament superconducting wire of Nb.sub.3 Sn in a copper matrix which eliminates the necessity of coating the drawn wire with tin. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb.sub.3 Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.

  12. Cratering on thermosonic copper wire ball bonding

    NASA Astrophysics Data System (ADS)

    Wei, Tan Chee; Daud, Abdul Razak

    2002-06-01

    Copper wire bonding offers several mechanical and electrical advantages as well as cost saving compared to its gold wire predecessor. Despite these benefits, silicon cratering, which completes the fracture and removal of bond pad underlayers, has been a major hurdle to overcome in copper wire bonding. Copper wire is harder than gold, and thus needs greater ultrasonic power and bond force to bond it onto metal pads such as aluminum. This paper reports a study on the influence of wire materials, bond pad hardness, and bonding-machine parameters (i.e., ultrasonic power and bond force) on silicon cratering phenomenon. Ultrasonic power and z-axis bond force were identified as the most critical bonding machine parameters in silicon cratering defects. A combination of greater bond force and lower ultrasonic power avoids silicon cratering and gives the desired effects. Results also show that a harder bond pad provides relatively good protection from silicon cratering.

  13. Wire and Cable Cold Bending Test

    NASA Technical Reports Server (NTRS)

    Colozza, Anthony

    2010-01-01

    One of the factors in assessing the applicability of wire or cable on the lunar surface is its flexibility under extreme cold conditions. Existing wire specifications did not address their mechanical behavior under cold, cryogenic temperature conditions. Therefore tests were performed to provide this information. To assess this characteristic 35 different insulated wire and cable pieces were cold soaked in liquid nitrogen. The segments were then subjected to bending and the force was recorded. Any failure of the insulation or jacketing was also documented for each sample tested. The bending force tests were performed at room temperature to provide a comparison to the change in force needed to bend the samples due to the low temperature conditions. The results from the bending tests were plotted and showed how various types of insulated wire and cable responded to bending under cold conditions. These results were then used to estimate the torque needed to unroll the wire under these low temperature conditions.

  14. Provision of IR-UWB wireless and baseband wired services over a WDM-PON.

    PubMed

    Pan, Shilong; Yao, Jianping

    2011-12-12

    A simple scheme to simultaneously generate an on-off keying or bi-phase modulation (BPM) impulse radio ultra wideband (IR-UWB) signal and a baseband wired signal in the optical domain using a dual-drive modulator is proposed and demonstrated. Although the two signals have spectral overlap in the optical spectrum, they are located at different frequency bands when converted to electrical signals at a photodetector (PD), which can be well separated by an electrical filter. An experiment is carried out. Eye diagrams, electrical spectra and BER measurements show that the co-channel interference between the UWB and the wired signals is small for a single-channel 36-km fiber link to provide 1.25-Gb/s UWB wireless and 1.25-Gb/s baseband wired services. The inter-channel interference is also small and negligible when the link is operated together with two other 1.25 Gb/s baseband wired links, which demonstrates that a conventional WDM-PON can be upgraded to provide additional UWB services without affecting the existing services by modifying the modulators in the center office and inserting UWB antennas in the optical network units. PMID:22274021

  15. 49 CFR 234.239 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...and interference of wires or tags with signal apparatus. 234.239 Section 234...DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS...and interference of wires or tags with signal apparatus. Each wire shall be...

  16. 49 CFR 236.76 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...and interference of wires or tags with signal apparatus. 236.76 Section 236...INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES...and interference of wires or tags with signal apparatus. Each wire shall be...

  17. 49 CFR 234.239 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...and interference of wires or tags with signal apparatus. 234.239 Section 234...TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING SIGNAL SYSTEMS, STATE ACTION PLANS, AND EMERGENCY...and interference of wires or tags with signal apparatus. Each wire shall be...

  18. 49 CFR 236.76 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...and interference of wires or tags with signal apparatus. 236.76 Section 236...INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES...and interference of wires or tags with signal apparatus. Each wire shall be...

  19. 49 CFR 234.239 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...and interference of wires or tags with signal apparatus. 234.239 Section 234...DEPARTMENT OF TRANSPORTATION GRADE CROSSING SIGNAL SYSTEM SAFETY AND STATE ACTION PLANS...and interference of wires or tags with signal apparatus. Each wire shall be...

  20. 49 CFR 236.76 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...and interference of wires or tags with signal apparatus. 236.76 Section 236...INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES...and interference of wires or tags with signal apparatus. Each wire shall be...

  1. 49 CFR 236.76 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...and interference of wires or tags with signal apparatus. 236.76 Section 236...INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES...and interference of wires or tags with signal apparatus. Each wire shall be...

  2. 49 CFR 234.239 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...and interference of wires or tags with signal apparatus. 234.239 Section 234...TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING SIGNAL SYSTEMS, STATE ACTION PLANS, AND EMERGENCY...and interference of wires or tags with signal apparatus. Each wire shall be...

  3. 49 CFR 234.239 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...and interference of wires or tags with signal apparatus. 234.239 Section 234...TRANSPORTATION GRADE CROSSING SAFETY, INCLUDING SIGNAL SYSTEMS, STATE ACTION PLANS, AND EMERGENCY...and interference of wires or tags with signal apparatus. Each wire shall be...

  4. 49 CFR 236.76 - Tagging of wires and interference of wires or tags with signal apparatus.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...and interference of wires or tags with signal apparatus. 236.76 Section 236...INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES...and interference of wires or tags with signal apparatus. Each wire shall be...

  5. Motor Modulation of Afferent Somatosensory Circuits SooHyun Lee, George E. Carvell, and Daniel J. Simons

    E-print Network

    Simons, Dan

    by electrical stimulation of presynaptic fibers. Three possible scenarios can explain the late component. One;2 Supplementary Figure 2. Schematic diagram of implantation method of whisker follicle stimulating wires. 1. The wires were led out from the skin immediately adjacent to the targeted whisker corresponding

  6. The Improvement of Sweep Stiffness and Thermomechanical Properties of Wire Bonds for Pure Gold Wire with Dopant

    Microsoft Academic Search

    Huang-Kuang Kung; Hung-Shyong Chen; Jeng-Nan Lee; Yun-Ping Sun

    2007-01-01

    The materials used in this study were three types of gold wire: SR-Y, high-loop wire; FA type, middle-loop wire; and GL-2, low-loop wire. All of these wires are composed of high-purity gold with various dopants added to obtain greater strength and stiffness. The three types of gold wire are gold alloys of 99.99% purity with less than 100 ppm of

  7. Study of 6 mil Cu Wire Replacing 10–15 mil Al Wire for Maximizing Wire-Bonding Process on Power ICs

    Microsoft Academic Search

    Yingwei Jiang; Ronglu Sun; Youmin Yu; Zhijie Wang

    2010-01-01

    Copper (Cu) wire-bonding with its advantage in cost, mechanical enhanced characteristic, and better electrical performance is a developing alternative interconnection technology to replace gold (Au) and aluminum (Al) wires in IC packaging manufacturing. This paper discussed the experimental study of using 6-mil Cu wire on an ASM wire bonder to replace 10-15 mil Al wire in a power IC device.

  8. Single wire drift chamber design

    SciTech Connect

    Krider, J.

    1987-03-30

    This report summarizes the design and prototype tests of single wire drift chambers to be used in Fermilab test beam lines. The goal is to build simple, reliable detectors which require a minimum of electronics. Spatial resolution should match the 300 ..mu..m rms resolution of the 1 mm proportional chambers that they will replace. The detectors will be used in beams with particle rates up to 20 KHz. Single track efficiency should be at least 99%. The first application will be in the MT beamline, which has been designed for calibration of CDF detectors. A set of four x-y modules will be used to track and measure the momentum of beam particles.

  9. Majoranas in Noisy Kitaev Wires

    E-print Network

    Ying Hu; Zi Cai; Mikhail A. Baranov; Peter Zoller

    2015-06-23

    Robustness of edge states and non-Abelian excitations of topological states of matter promises quantum memory and quantum processing, which is naturally immune against microscopic imperfections such as static disorder. However, topological properties will not in general protect quantum system from time-dependent disorder or noise. Here we take the example of a network of Kitaev wires with Majorana edge modes storing qubits to investigate the effects of classical noise in the crossover from the quasi-static to the fast fluctuation regime. We present detailed results for the Majorana edge correlations, and fidelity of braiding operations for both global and local noise sources preserving parity symmetry, such as random chemical potentials and phase fluctuations. While in general noise will induce heating and dephasing, we identify examples of long-lived quantum correlations in presence of fast noise due to motional narrowing, where external noise drives the system rapidly between the topological and non-topological phases.

  10. Binary alloy phase diagrams requiring further studies

    Microsoft Academic Search

    H. Okamoto; T. B. Massalski

    1994-01-01

    Binary Alloy Phase Diagrams , 2nd ed. 90Mas, covering ?3000 systems and ?2200 phase diagrams, is the most current compilation of binary systems. However,\\u000a ?500 of them include thermodynamically unlikely features. These problems are classified into more than 30 groups, and a few\\u000a typical examples are shown for each group. If a phase diagram shows an improbable feature, it implies

  11. The box diagram in Yukawa theory

    E-print Network

    Bernard L. G. Bakker; Jorn K. Boomsma; Chueng-Ryong Ji

    2006-10-30

    We present a light-front calculation of the box diagram in Yukawa theory. The covariant box diagram is finite for the case of spin-1/2 constituents exchanging spin-0 particles. In light-front dynamics, however, individual time-ordered diagrams are divergent. We analyze the corresponding light-front singularities and show the equivalence between the light-front and covariant results by taming the singularities.

  12. Talley, L.D. 2013. Closure of the global overturning circulation through the Indian, Pacific, and Southern Oceans: Schematics and transports. Oceanography 26(1):8097,

    E-print Network

    Talley, Lynne D.

    , Pacific, and Southern Oceans: Schematics and transports. Oceanography 26(1):80­97, http://dx.doi.org/10 in Oceanography, Volume 26, Number 1, a quarterly journal of e Oceanography Society. Copyright 2013 by e Oceanography Society. All rights reserved. USAGE Permission is granted to copy this article for use in teaching

  13. Exploring Verbal, Visual and Schematic Learners' Static and Dynamic Mental Images of Scientific Species and Processes in Relation to Their Spatial Ability

    ERIC Educational Resources Information Center

    Al-Balushi, Sulaiman M.; Coll, Richard Kevin

    2013-01-01

    The current study compared different learners' static and dynamic mental images of unseen scientific species and processes in relation to their spatial ability. Learners were classified into verbal, visual and schematic. Dynamic images were classified into: appearing/disappearing, linear-movement, and rotation. Two types of scientific…

  14. Classical 3-loop 2-body diagrams

    E-print Network

    Barak Kol; Ruth Shir

    2013-07-30

    As part of the study of the two-body problem in Einstein's gravity, the fourth post-Newtonian order (4PN) of the two-body effective action is being computed presently by both effective field theory (EFT) methods and others. Diagrams with 3 (or 4) classical loops appear to be a significant obstacle. In this paper we develop a method to compute such 3-loop diagrams and demonstrate it through a specific diagram. We reduce the classical diagrams through shrinking the body worldlines to a form more familiar in Quantum Field Theory. A key ingredient in the evaluation is the Integration By Parts method for Feynman integrals.

  15. Hofstadter Butterfly Diagram in Noncommutative Space

    E-print Network

    Hidenori Takahashi; Masanori Yamanaka

    2006-06-23

    We study an energy spectrum of electron moving under the constant magnetic field in two dimensional noncommutative space. It take place with the gauge invariant way. The Hofstadter butterfly diagram of the noncommutative space is calculated in terms of the lattice model which is derived by the Bopp's shift for space and by the Peierls substitution for external magnetic field. We also find the fractal structure in new diagram. Although the global features of the new diagram are similar to the diagram of the commutative space, the detail structure is different from it.

  16. Development of a precision wire feeder for small-diameter wire

    SciTech Connect

    Brandon, E.D.

    1995-03-01

    At Sandia National Laboratories in Albuquerque, the author designed and fabricated a precision wire feeder to be used with high energy density (electron beam and laser beam) welding for weld joints where filler wire might be needed to fill a gap or to adjust the chemical composition so that a crack-free weld could be made. The wire feeder incorporates a 25,000 step-per-revolution motor to power a urethane-coated drive roll. A microprocessor-based controller provides precise control of the motor and allows both continuous and pulsed feeding of the wire. A unidirectional 0.75-in.-dia ball bearing is used to press the wire against the drive roll. A slight constant backward tension is maintained on the wire spool by a Bodine torque motor. A Teflon tube is used to guide the wire from the drive roll to the vicinity of the weld, where a hypodermic needle is used to aim the wire into the weld pool. The operation of the wire feeder was demonstrated by feeding a 10-mil-dia, Type 304 stainless steel wire into a variety of CO{sub 2} laser beam welds. The resulting welds are smooth and continuous, and the welds are considered to be completely satisfactory for a variety of applications.

  17. Wire Crimp Termination Verification Using Ultrasonic Inspection

    NASA Technical Reports Server (NTRS)

    Perey, Daniel F.; Cramer, K. Elliott; Yost, William T.

    2007-01-01

    The development of a new ultrasonic measurement technique to quantitatively assess wire crimp terminations is discussed. The amplitude change of a compressional ultrasonic wave propagating through the junction of a crimp termination and wire is shown to correlate with the results of a destructive pull test, which is a standard for assessing crimp wire junction quality. Various crimp junction pathologies such as undercrimping, missing wire strands, incomplete wire insertion, partial insulation removal, and incorrect wire gauge are ultrasonically tested, and their results are correlated with pull tests. Results show that the nondestructive ultrasonic measurement technique consistently (as evidenced with destructive testing) predicts good crimps when ultrasonic transmission is above a certain threshold amplitude level. A physics-based model, solved by finite element analysis, describes the compressional ultrasonic wave propagation through the junction during the crimping process. This model is in agreement within 6% of the ultrasonic measurements. A prototype instrument for applying this technique while wire crimps are installed is also presented. The instrument is based on a two-jaw type crimp tool suitable for butt-splice type connections. Finally, an approach for application to multipin indenter type crimps will be discussed.

  18. 30 CFR 75.517 - Power wires and cables; insulation and protection.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...Power wires and cables; insulation and protection. [Statutory Provisions] Power wires and cables, except trolley wires, trolley feeder wires, and bare signal wires, shall be insulated adequately and fully...

  19. 30 CFR 75.517 - Power wires and cables; insulation and protection.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...Power wires and cables; insulation and protection. [Statutory Provisions] Power wires and cables, except trolley wires, trolley feeder wires, and bare signal wires, shall be insulated adequately and fully...

  20. Magnetic field-assisted synthesis of wire-like Co{sub 3}O{sub 4} nanostructures: Electrochemical and photocatalytic studies

    SciTech Connect

    Zhao, Xiubin; Pang, Zhanwen [Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials, Anhui University, Hefei 230039 (China)] [Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials, Anhui University, Hefei 230039 (China); Wu, Mingzai, E-mail: mingzaiwu@gmail.com [Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials, Anhui University, Hefei 230039 (China) [Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials, Anhui University, Hefei 230039 (China); Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui (China); Liu, Xiansong; Zhang, Hui; Ma, Yongqing; Sun, Zhaoqi [Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials, Anhui University, Hefei 230039 (China)] [Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials, Anhui University, Hefei 230039 (China); Zhang, Lide [Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui (China)] [Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui (China); Chen, Xiaoshuang [The Shanghai Institute of Technical Physics of the Chinese Academy of Sciences, Shanghai 200083 (China)] [The Shanghai Institute of Technical Physics of the Chinese Academy of Sciences, Shanghai 200083 (China)

    2013-01-15

    Graphical abstract: Schematic illustration for the magnetic field-assisted growth of wire-like Co{sub 3}O{sub 4} nanostructure. Display Omitted Highlights: ? Co{sub 3}O{sub 4} nanowires are prepared by magnetic field hydrothermal reduction and annealing. ? These Co{sub 3}O{sub 4} nanowires possess enhanced capacitance. ? The Co{sub 3}O{sub 4} nanowires have a good photocatalytic activity for methyl orange. -- Abstract: Wire-like Co{sub 3}O{sub 4} nanostructures were prepared by the combination of magnetic field-assisted hydrothermal reduction of cobalt ions and the subsequent ambient annealing at 500 °C. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize the structure and morphological evolution of the products. The results show that the wire-like nanostructures possess diameters about 250 nm and lengths over 10 ?m. The possible formation mechanism of the wire-like Co{sub 3}O{sub 4} nanostructures is also proposed based on the SEM results. Galvanostatic methods were used to characterize the electrochemical properties. The measurements indicate that the wire-like Co{sub 3}O{sub 4} nanostructures show larger discharge and charge capacities than that of spherical Co{sub 3}O{sub 4} nanoparticles prepared in the absence of magnetic field. In addition, the photocatalytic activity of the products was investigated by measuring the photodegradation of methyl orange solution under ultraviolet radiation, which shows that both the wire-like and spherical products have a good photocatalytic activity.

  1. Phase Diagram of Optimal Paths

    E-print Network

    Alex Hansen; Janos Kertesz

    2004-02-17

    We show that choosing appropriate distributions of the randomness, the search for optimal paths links diverse problems of disordered media like directed percolation, invasion percolation, directed and non-directed spanning polymers. We also introduce a simple and efficient algorithm, which solves the d-dimensional model numerically in order N^(1+d_f/d) steps where d_f is the fractal dimension of the path. Using extensive simulations in two dimensions we identify the phase boundaries of the directed polymer universality class. A new strong-disorder phase occurs where the optimum paths are self-affine with parameter-dependent scaling exponents. Furthermore, the phase diagram contains directed and non-directed percolation as well as the directed random walk models at specific points and lines.

  2. Hubble's diagram and cosmic expansion

    PubMed Central

    Kirshner, Robert P.

    2004-01-01

    Edwin Hubble's classic article on the expanding universe appeared in PNAS in 1929 [Hubble, E. P. (1929) Proc. Natl. Acad. Sci. USA 15, 168–173]. The chief result, that a galaxy's distance is proportional to its redshift, is so well known and so deeply embedded into the language of astronomy through the Hubble diagram, the Hubble constant, Hubble's Law, and the Hubble time, that the article itself is rarely referenced. Even though Hubble's distances have a large systematic error, Hubble's velocities come chiefly from Vesto Melvin Slipher, and the interpretation in terms of the de Sitter effect is out of the mainstream of modern cosmology, this article opened the way to investigation of the expanding, evolving, and accelerating universe that engages today's burgeoning field of cosmology. PMID:14695886

  3. Failure analysis of explanted sternal wires.

    PubMed

    Shih, Chun-Ming; Su, Yea-Yang; Lin, Shing-Jong; Shih, Chun-Che

    2005-05-01

    To classify and understand the mechanisms of surface damages and fracture mechanisms of sternal wires, explanted stainless steel sternal wires were collected from patients with sternal dehiscence following open-heart surgery. Surface alterations and fractured ends of sternal wires were examined and analyzed. Eighty fractured wires extracted from 25 patients from January 1999 to December 2003, with mean implantation interval of 55+/-149 days (range 5-729 days) after cardiac surgery, were studied by various techniques. The extracted wires were cleaned and the fibrotic tissues were removed. Irregularities and fractured ends were assayed by a scanning electron microscopy. After stereomicroscopy and documentation, the explants were cleaned with 1% sodium hypochlorite to remove the blood and tissues and was followed by cleaned with deionized water and alcohol. The explants were examined by stereomicroscopy, and irregularities on surface and fracture surfaces of sternal wires were assayed by scanning electron microscopy, energy dispersive X-ray analysis (EDAX) and X-ray mapping. The explants with surrounding fibrotic tissue were stained and examined with stereomicroscopy and transmission electronic microscopy. Corrosion pits were found on the surface of explanted sternal wires. EDAX and X-ray mapping examinations revealed diminution of nickel concentration in the severely corroded pits on sternal wires. A feature of transgranular cracking was observed for stress corrosion cracking and striation character for typical corrosion fatigue was also identified. TEM examination of tissue showed the metallic particles in phagolysosomes of macrophages inside the surrounding sternal tissue. The synergic effect of hostile environment and the stress could be the precursors of failures for sternal wires. PMID:15576179

  4. Total recall: an update on orthodontic wires.

    PubMed

    Jyothikiran, H; Shantharaj, Ravi; Batra, Panchali; Subbiah, Pradeep; Lakshmi, Bhagya; Kudagi, Vishal

    2014-01-01

    Orthodontic therapy is a force management procedure largely based on use of arch wires for storing and distributing biologically tolerable forces by means of which position of teeth is altered. Advances in material science and technology has resulted in an array of newer arch wire materials, opening new vistas, in orthodontic treatment. Materials with widely diverging properties are in the market today and their usage has profound implications on appliance mechanics, and are very much different from stainless steel which is popular even today. The dentists who practise orthodontics have to therefore clearly outline the phases of treatment and select the arch wire most suited for attaining specific treatment goals. PMID:25745725

  5. Transport in partially equilibrated inhomogeneous quantum wires.

    SciTech Connect

    Levchenko, A.; Micklitz, T.; Rech, J.; Matveev, K. A.; Materials Science Division; Freie Univ. Berlin; Centre de Physique Theorique

    2010-01-01

    We study transport properties of weakly interacting one-dimensional electron systems including on an equal footing thermal equilibration due to three-particle collisions and the effects of large-scale inhomogeneities. We show that equilibration in an inhomogeneous quantum wire is characterized by the competition of interaction processes which reduce the electrons total momentum and such which change the number of right- and left-moving electrons. We find that the combined effect of interactions and inhomogeneities can dramatically increase the resistance of the wire. In addition, we find that the interactions strongly affect the thermoelectric properties of inhomogeneous wires and calculate their thermal conductance, thermopower, and Peltier coefficient.

  6. Plastic Deformation of 2D Crumpled Wires

    E-print Network

    M A F Gomes; V P Brito; A S O Coelho; C C Donato

    2008-11-17

    When a single long piece of elastic wire is injected trough channels into a confining two-dimensional cavity, a complex structure of hierarchical loops is formed. In the limit of maximum packing density, these structures are described by several scaling laws. In this paper it is investigated this packing process but using plastic wires which give origin to completely irreversible structures of different morphology. In particular, it is studied experimentally the plastic deformation from circular to oblate configurations of crumpled wires, obtained by the application of an axial strain. Among other things, it is shown that in spite of plasticity, irreversibility, and very large deformations, scaling is still observed.

  7. Fabrication of FFTF fuel pin wire wrap

    SciTech Connect

    Epperson, E.M.

    1980-06-01

    Lateral spacing between FFTF fuel pins is required to provide a passageway for the sodium coolant to flow over each pin to remove heat generated by the fission process. This spacing is provided by wrapping each fuel pin with type 316 stainless steel wire. This wire has a 1.435mm (0.0565 in.) to 1.448mm (0.0570 in.) diameter, contains 17 +- 2% cold work and was fabricated and tested to exacting RDT Standards. About 500 kg (1100 lbs) or 39 Km (24 miles) of fuel pin wrap wire is used in each core loading. Fabrication procedures and quality assurance tests are described.

  8. Detectors Ensure Function, Safety of Aircraft Wiring

    NASA Technical Reports Server (NTRS)

    2013-01-01

    Pedro Medelius waited patiently in his lab at Kennedy Space Center. He had just received word that a colleague was bringing over a cable from a Space Shuttle solid rocket booster to test Medelius new invention. Medelius was calm until his colleague arrived, with about 30 other people. "Talk about testing under pressure," says Medelius. "There were people there from the Navy, the Air Force, and the Federal Aviation Administration." After the group s arrival, Medelius took a deep breath and connected his Standing Wave Reflectometer (SWR) to the cable. He wiggled the cable around, and the display showed a fault (a short or open circuit in wire) about an inch and a half inside the connector on the cable. His colleague questioned the results, because he had already checked that area on the cable. Medelius used the SWR to check again but got the same result. "That is when we took the cable apart and looked inside," Medelius says. "Lo and behold, that was exactly where the fault was." The impetus for Medelius new wire inspection technology came about in 1999 when one of the space shuttles lost power due to a fault somewhere in its more than 200 miles of electrical wiring. "The backup circuit was activated and prevented a major dysfunction, but nevertheless, there was a problem with the wiring," Medelius describes. Even though technicians used a device called a multimeter to measure the electrical current to find which wire had a fault, it could not pinpoint exactly where on the wire the fault was located. For that, technicians had to visually inspect the wire. "Sometimes they would have to remove the whole wire assembly and visually inspect every single wire. It was a very tedious operation because the wires are behind cabinets. They go all over the place in the shuttle," says Medelius. "NASA needed an instrument capable of telling them exactly where the faults were occurring." To meet NASA s needs for a highly precise device to inspect electrical power bundles, wires, and connectors, Medelius devised the SWR. "It came down to what was affected when a wire is short circuited or opened," he says. "We worked out a few equations based on physical principles." The SWR proved very sensitive, and the technology was patented.

  9. Fast wire scanner for intense electron beams

    NASA Astrophysics Data System (ADS)

    Moore, T.; Agladze, N. I.; Bazarov, I. V.; Bartnik, A.; Dobbins, J.; Dunham, B.; Full, S.; Li, Y.; Liu, X.; Savino, J.; Smolenski, K.

    2014-02-01

    We have developed a cost-effective, fast rotating wire scanner for use in accelerators where high beam currents would otherwise melt even carbon wires. This new design uses a simple planetary gear setup to rotate a carbon wire, fixed at one end, through the beam at speeds in excess of 20 m/s. We present results from bench tests, as well as transverse beam profile measurements taken at Cornell's high-brightness energy recovery linac photoinjector, for beam currents up to 35 mA.

  10. Bright Core-Shell Semiconductor Quantum Wires

    PubMed Central

    Liu, Yi-Hsin; Wang, Fudong; Hoy, Jessica; Wayman, Virginia L.; Steinberg, Lindsey K.; Loomis, Richard A.; Buhro, William E.

    2012-01-01

    Colloidal CdTe quantum wires are reported having ensemble photoluminescence efficiencies as high as 25% under low excitation-power densities. High photoluminescence efficiencies are achieved by formation of a monolayer CdS shell on the CdTe quantum wires. Like other semiconductor nanowires, the CdTe quantum wires may contain frequent wurtzite–zinc-blende structural alternations along their lengths. The present results demonstrate that the optical properties, emission-peak shape and photoluminescence efficiencies, are independent of the presence or absence of such structural alternations. PMID:23095017

  11. Drafting. Advanced Print Reading--Electrical.

    ERIC Educational Resources Information Center

    Oregon State Dept. of Education, Salem.

    This document is a workbook for drafting students learning advanced print reading for electricity applications. The workbook contains seven units covering the following material: architectural working drawings; architectural symbols and dimensions; basic architectural electrical symbols; wiring symbols; riser diagrams; schematic diagrams; and…

  12. Optimal Design of Shape Memory Alloy Wire Bundle Actuators

    Microsoft Academic Search

    Kathryn J. De Laurentis; Avi Fisch; Jason Nikitczuk; Constantinos Mavroidis

    2002-01-01

    This research studied the optimal design of Shape Memory Alloy (SMA) muscle wire bundle actuators. Current literature describes the use of multiple muscle wires placed in parallel to increase the lifting capabilities of an SMA actuator, which however, is limited to wires of like -diameter. A constrained optimization problem was formulated, with constraints on the maximum number of wires, voltage

  13. What's in the Walls: Copper, Fiber, or Coaxial Wiring?

    ERIC Educational Resources Information Center

    Weiss, Andrew M.

    1995-01-01

    Presents planning guidelines for wiring specifications for K-12 schools by reviewing advantages and disadvantages of using copper, fiber-optic, and coaxial wire. Addresses the future of network wiring and educational technology, and makes recommendations. A sidebar describes the physical appearance of different types of wire and a table compares…

  14. Copper wire bonding challenges and solutions of small outline packages

    Microsoft Academic Search

    Nicole Lin; C. E. Tan; Y. J. Pan

    2010-01-01

    Moving towards next level of major cost saving in small outline packages, conversion from gold wire to copper wire became necessary action. With normal production expectations of fast bonding and good quality performance on flimsy leadframe, copper wire challenges of small outline packages were incredible. Furthermore, situation became worse when new copper wire process was found requiring additional bonding time

  15. Reliability of copper wire bonding in humidity environment

    Microsoft Academic Search

    Hai Liu; Zhenqing Zhao; Qiang Chen; Jianwei Zhou; Maohua Du; Senyun Kim; Jonghyun Chae; Myungkee Chung

    2011-01-01

    Copper wire bonding is being developed rapidly in recent years to replace expensive gold wire for electronic packaging. However, one issue about reliability in humidity environment causes risk in its application. The copper wire-aluminum pad interface degradation usually leads to electrical open failure. Present paper studied all the 5 factors including pad finish of chip, molding compound, wire bonding parameters,

  16. Diamagnetism in wire medium metamaterials: theory and experiment

    E-print Network

    Yagupov, Ilya; Kosulnikov, Sergei; Hasan, Mehedi; Iorsh, Ivan; Belov, Pavel

    2015-01-01

    Strong diamagnetic response of wire medium with finite wire radius is reported. Contrary to the previous works where it was assumed that the wire medium exhibits only the electric response, we show that the non-zero magnetic susceptibility has to be taken into account for proper effective medium description of the wire medium. Analytical and numerical results are supported by the experimental measurements.

  17. Spectral Characteristics of Exploding Wires for Optical Maser Excitation

    Microsoft Academic Search

    M. J. Stevenson; W. Reuter; N. Braslau; P. P. Sorokin; A. J. Landon

    1963-01-01

    As pulsed light sources, exploding wires can be used to provide intense narrow spectral lines as well as the characteristic continuum of very high temperature blackbodies. The surface brightness depends on the wire material and conditions under which the wire is exploded. Optimum conditions for 100–500-?sec long light pulses from wires exploded in air have been found for tungsten, tantalum,

  18. Optimization of copper wire bonding on Al-Cu metallization

    Microsoft Academic Search

    Luu T. Nguyen; David McDonald; Anselm R. Danker; Peter Ng

    1995-01-01

    This paper reports the successful implementation of copper wire ball bonding for selected TO-220 devices on a high volume commercial scale. Since August 1992, copper wire bonding has been used in production at National Semiconductor Corp. The development of copper wire ball bonding involves a three-prong approach: optimum pad metal composition, modifications to the wire bonder and optimization of the

  19. Fine pitch Cu wire bonding — As good as gold

    Microsoft Academic Search

    Bernd K. Appelt; William T. Chen; Andy Tseng; Yi-Shao Lai

    2010-01-01

    Fine pitch gold wire bonding is the pre-eminent technology for die interconnection and has been advanced to very fine wire diameters. Copper wire bonding has been used for many years as well but was relegated to large wire diameters in automotive and power applications. The surge in gold commodity prices to more than 1,000 USD has fueled great interest in

  20. Reliability of Cu Wire Bonding to Al Metallization

    Microsoft Academic Search

    L. England; T. Jiang

    2007-01-01

    The use of Cu wire for thermosonic ball bonding presents several advantages over Au wire. These advantages include significant cost savings due to cheaper raw material cost, higher electrical conductivity for faster die functionality, and much slower intermetallic compound (IMC) growth than Au wire. There are still some challenges that must be overcome, however, before Cu wire bonding can be

  1. Effects of plasma cleaning on the reliability of wire bonding

    Microsoft Academic Search

    J. M. Nowful; S. C. Lok; S.-W. Ricky Lee

    2001-01-01

    The yield of wire bonding predominantly depends on the surface characteristics of wire bond pads. The contamination on bond pads may result in low ball shear\\/wire pull strength and poor strength uniformity. Therefore, it is essential to remove the contaminants from the bond pad surface prior to wire bonding. In the present study, the effects of plasma cleaning on the

  2. Effect of the Properties of Gold Wire on the Ability of Low-looped Wire Bonding

    Microsoft Academic Search

    Xiu-Lan Cheng; Yu-Cai Huang

    2006-01-01

    With the advents and applications of modern packages that employ very thin, die stacking or multi-tiered technologies, low-looped wire bonding with conventional gold wire attracted more attentions. The effect of the size and type of gold wire on the bonding quality, low-looped ability were studied and analyzed. After the serial experiments, such as ball pull test, ball shear test, HAZ

  3. Quench dynamics and parity blocking in Majorana wires

    NASA Astrophysics Data System (ADS)

    Hegde, Suraj; Shivamoggi, Vasudha; Vishveshwara, Smitha; Sen, Diptiman

    2015-05-01

    We theoretically explore quench dynamics in a finite-sized topological fermionic p-wave superconducting wire with the goal of demonstrating that topological order can have marked effects on such non-equilibrium dynamics. In the case studied here, topological order is reflected in the presence of two (nearly) isolated Majorana fermionic end bound modes together forming an electronic state that can be occupied or not, leading to two (nearly) degenerate ground states characterized by fermion parity. Our study begins with a characterization of the static properties of the finite-sized wire, including the behavior of the Majorana end modes and the form of the tunnel coupling between them; a transfer matrix approach to analytically determine the locations of the zero energy contours where this coupling vanishes; and a Pfaffian approach to map the ground state parity in the associated phase diagram. We next study the quench dynamics resulting from initializing the system in a topological ground state and then dynamically tuning one of the parameters of the Hamiltonian. For this, we develop a dynamic quantum many-body technique that invokes a Wick’s theorem for Majorana fermions, vastly reducing the numerical effort given the exponentially large Hilbert space. We investigate the salient and detailed features of two dynamic quantities—the overlap between the time-evolved state and the instantaneous ground state (adiabatic fidelity) and the residual energy. When the parity of the instantaneous ground state flips successively with time, we find that the time-evolved state can dramatically switch back and forth between this state and an excited state even when the quenching is very slow, a phenomenon that we term ‘parity blocking’. This parity blocking becomes prominently manifest as non-analytic jumps as a function of time in both dynamic quantities.

  4. Counting planar diagrams with various restrictions

    Microsoft Academic Search

    Gerard't Hooft

    1999-01-01

    Explicit expressions are considered for the generating functions concerning the number of planar diagrams with given numbers of 3- and 4-point vertices. It is observed that planar renormalization theory requires diagrams with restrictions, in the sense that one wishes to omit ‘tadpole’ insertions and ‘seagull’ insertions; at a later stage also self-energy insertions are to be removed, and finally also

  5. On the convergence of planar diagram expansions

    Microsoft Academic Search

    Gerard't Hooft

    1982-01-01

    Renormalizable quantum field theories whose perturbation expansions are described by planar Feynman diagrams only, such as SU(8) gauge theory, are considered in 4 dimensional Euclidean space. For studying asymptotic properties of the perturbation series one might wish to isolate first all those planar diagrams that do not contain any ultraviolet divergent subgraphs. In this paper it is proved that this

  6. User applications of alloy phase diagrams

    Microsoft Academic Search

    V. Raghavan

    2009-01-01

    the Schaeffler diagram. Apart from Cr and Ni, other intentionally added or residual alloying elements in stainless steels are usually present in smaller concentrations. The empirical diagrams take these into account by using either a chromium equivalent or a nickel equivalent, depending on whether the alloying element stabilizes ferrite or austenite. Fixed values of the equivalents obtained from a limited

  7. Towards Flexible Graphical Communication Using Adaptive Diagrams

    Microsoft Academic Search

    Kim Marriott; Bernd Meyer; Peter J. Stuckey

    2004-01-01

    Unlike today where the majority of diagrams are static, life- less objects reflecting their origin in print media, the computer of the near future will provide more flexible visual computer interfaces in which di- agrams adapt to their viewing context, support interactive exploration and provide semantics-based retrieval and adaptation. We provide an overview of the Adaptive Diagram Research Project whose

  8. Combinatorial Gelfand Models for Diagram Algebras

    E-print Network

    Halverson, Tom

    Combinatorial Gelfand Models for Diagram Algebras Tom Halverson Department of Mathematics, Statistics, and Computer Science MACALESTER COLLEGE January 11, 2013 JMM San Diego Tom Halverson (Macalester appears with multiplicity exactly 1. Tom Halverson (Macalester College) Diagram Models 1/11/2013 2 / 16

  9. MCS 360 L-5 use case diagram

    E-print Network

    Verschelde, Jan

    MCS 360 L-5 1 Sep 2010 an online phone book use case diagram encapsulating a file Command Line phonebook.h and phonebook.cpp the main program MCS 360 Lecture 5 Introduction to Data Structures Jan Verschelde, 1 September 2010 #12;MCS 360 L-5 1 Sep 2010 an online phone book use case diagram encapsulating

  10. MCS 360 L5 use case diagram

    E-print Network

    Verschelde, Jan

    MCS 360 L­5 1 Sep 2010 an online phone book use case diagram encapsulating file Command Line phonebook.h and phonebook.cpp the main program MCS 360 Lecture 5 Introduction to Data Structures Jan Verschelde, 1 September 2010 MCS 360 L­5 1 Sep 2010 an online phone book use case diagram encapsulating file

  11. Phase diagram of a random tiling quasicrystal

    Microsoft Academic Search

    Weixiong Li; Michael Widom

    1992-01-01

    We study the phase diagram of a two-dimensional random tiling model for quasicrystals. At proper concentrations the model has 8-fold rotational symmetry. Landau theory correctly gives most of the qualitative features of the phase diagram, which is in turn studied in detail numerically using a transfer matrix approach. We find that the system can enter the quasicrystal phase from many

  12. A Monitoring Profile for UML Sequence Diagrams

    Microsoft Academic Search

    Kai Xu; Donglin Liang

    UML sequence diagrams are widely used during require- ments analysis and design for specifying the expected behaviors of a system. In this paper, we present a monitoring profile that extends se- quence diagrams to facilitate the comparison between the actual behav- iors and expected behaviors of a system. With the profile, the developers can precisely specify the runtime objects to

  13. Sematics of UML Sequence Diagrams in PVS

    Microsoft Academic Search

    Demissie B. Aredo

    In this paper, we present formal semantics of UML (Unified Modeling Language) sequence diagrams using the PVS (Prototype Ver- ification System) (8) as an underlying semantic foundation. We give a formal definition of a trace-based semantics (5) of UML sequence dia- grams; i.e. a sequence diagram is interpreted as a set of traces of events that may occur in the

  14. Fundamental Traffic Diagrams of Elementary Road Networks

    Microsoft Academic Search

    N. Farhi; M. Goursat; J. P. Quadrat

    The fundamental traffic diagram gives the relation between the flow and the density of vehicles on a road. This diagram has been obtained for one circular road in the deterministic and stochastic cases. In this paper we revisit the simplest example of two roads and one crossing given in (2) and we study the interaction between crossings on a system

  15. Evaluation of Wiring Constructions for Space Applications

    NASA Technical Reports Server (NTRS)

    Hammoud, Ahmad N.; Stavnes, Mark W.; Dickman, John E.; Burkhardt, Linda A.; Woodford, Lynn M.; Ide, James R.; Muegge, ED

    1994-01-01

    A NASA Office of Safety and Mission Assurance (OS&MA) program to develop lightweight, reliable, and safe wiring insulations for aerospace applications is being performed by the NASA Lewis Research Center (LeRC). As part of this effort, a new wiring construction utilizing high strength PTFE (poly tetrafluoroethylene) as the insulation has been tested and compared with the existing military standard polyimide-based MIL-W-81381 wire construction. Electrical properties which were investigated included ac corona inception and extinction voltages (sea level and 60,000 feet), time/current to smoke, and wire fusing time. The two constructions were also characterized in terms of their mechanical properties of flexural strength, abrasion resistance (23 C and 150 C), and dynamic cut-through (23 C and 200 C). The results obtained in this testing effort are presented and discussed in this paper.

  16. An advanced arc track resistant airframe wire

    NASA Technical Reports Server (NTRS)

    Beatty, J.

    1995-01-01

    Tensolite, a custom cable manufacturer specializing in high temperature materials as the dielectric medium, develops an advance arc track resistant airframe wire called Tufflite 2000. Tufflite 2000 has the following advantages over the other traditional wires: lighter weight and smaller in diameter; excellent wet and dry arc track resistance; superior dynamic cut-through performance even at elevated temperatures; flight proven performance on Boeing 737 and 757 airplanes; and true 260 C performance by utilizing Nickel plated copper conductors. This paper reports the different tests performed on Tufflite 2000: accelerated aging, arc resistance (wet and dry), dynamic cut through, humidity resistance, wire-to-wire abrasion, flammability, smoke, weight, notch sensitivity, flexibility, and markability. It particularly focuses on the BSI (British Standards Institute) dry arc resistance test and BSI wet arc tracking.

  17. Superconducting wire for NMR-tomography

    SciTech Connect

    Filkin, V.Y.; Plashkin, E.I.; Salunin, N.I.; Morozova, T.A.; Zelenskiy, G.K.; Vlasova, L.V.; Drobyshev, V.A.; Zinovev, V.G.; Yakovlev, B.V. (All-Union Scientific and Research Inst. of Inorganic Materials, 123060 Moscow (SU))

    1992-01-01

    The paper discusses the fabrication of Nb-Ti base superconducting wires having the superconductor packing factor of 15-20% and superconducting filaments 70-80 {mu}m dia. Three methods of precursor fabrication were tried. The NbTi-50 alloy base superconducting wire was fabricated to be used for the magnet system of a NMR-tomograph; the wire diameter is 0.85 mm; the packing factor is 16%; the maximum length of a single piece is 29 km{sub 2}. The critical current density is 6.1 {times} 10{sup 5} A/cm{sup 2} in the magnetic field of 1 T. The paper also presents the superconducting properties of similar wire on the NbTi-55 alloy base.

  18. t matrix of metallic wire structures

    SciTech Connect

    Zhan, T. R., E-mail: phystrzhan@gmail.com; Chui, S. T., E-mail: chui@bartol.udel.edu [Bartol Research Institute, University of Delaware, Newark, Delaware 19716 (United States)

    2014-04-14

    To study the electromagnetic resonance and scattering properties of complex structures of which metallic wire structures are constituents within multiple scattering theory, the t matrix of individual structures is needed. We have recently developed a rigorous and numerically efficient equivalent circuit theory in which retardation effects are taken into account for metallic wire structures. Here, we show how the t matrix can be calculated analytically within this theory. We illustrate our method with the example of split ring resonators. The density of states and cross sections for scattering and absorption are calculated, which are shown to be remarkably enhanced at resonant frequencies. The t matrix serves as the basic building block to evaluate the interaction of wire structures within the framework of multiple scattering theory. This will open the door to efficient design and optimization of assembly of wire structures.

  19. Frequency Responses Of Hot-Wire Anemometers

    NASA Technical Reports Server (NTRS)

    Watmuff, Jonathan H.

    1992-01-01

    Report describes theoretical study of frequency response of constant-temperature hot-wire anemometer, with view toward increasing frequency response while maintaining stable operation in supersonic flow. Effects of various circuit parameters discussed.

  20. Improvements to Existing Jefferson Lab Wire Scanners

    SciTech Connect

    McCaughan, Michael D. [JLAB; Tiefenback, Michael G. [JLAB; Turner, Dennis L. [JLAB

    2013-06-01

    This poster will detail the augmentation of selected existing CEBAF wire scanners with commercially available hardware, PMTs, and self created software in order to improve the scanners both in function and utility.

  1. Side wire feed for welding apparatus

    NASA Technical Reports Server (NTRS)

    Arnett, J. C.

    1974-01-01

    Coaxial electrode arrangement has solid central electrode, insulated outer electrode, and transverse channel for feeding wire through tip of electrode assembly. Polymeric insulation is thrust aside by pressure, which is provided by separately operated mechanism acting through central electrode.

  2. Development of tunable terahertz wire lasers

    E-print Network

    Hu, Qing

    We report a novel tuning mechanism based on a “wire-laser” with subwavelength transverse dimensions(w??). By manipulating the waveguided mode propagating outside the cavity, frequency tuning of ?137GHz (3.6%) is demonstrated ...

  3. t matrix of metallic wire structures

    NASA Astrophysics Data System (ADS)

    Zhan, T. R.; Chui, S. T.

    2014-04-01

    To study the electromagnetic resonance and scattering properties of complex structures of which metallic wire structures are constituents within multiple scattering theory, the t matrix of individual structures is needed. We have recently developed a rigorous and numerically efficient equivalent circuit theory in which retardation effects are taken into account for metallic wire structures. Here, we show how the t matrix can be calculated analytically within this theory. We illustrate our method with the example of split ring resonators. The density of states and cross sections for scattering and absorption are calculated, which are shown to be remarkably enhanced at resonant frequencies. The t matrix serves as the basic building block to evaluate the interaction of wire structures within the framework of multiple scattering theory. This will open the door to efficient design and optimization of assembly of wire structures.

  4. An advanced arc track resistant airframe wire

    NASA Astrophysics Data System (ADS)

    Beatty, J.

    1995-11-01

    Tensolite, a custom cable manufacturer specializing in high temperature materials as the dielectric medium, develops an advance arc track resistant airframe wire called Tufflite 2000. Tufflite 2000 has the following advantages over the other traditional wires: lighter weight and smaller in diameter; excellent wet and dry arc track resistance; superior dynamic cut-through performance even at elevated temperatures; flight proven performance on Boeing 737 and 757 airplanes; and true 260 C performance by utilizing Nickel plated copper conductors. This paper reports the different tests performed on Tufflite 2000: accelerated aging, arc resistance (wet and dry), dynamic cut through, humidity resistance, wire-to-wire abrasion, flammability, smoke, weight, notch sensitivity, flexibility, and markability. It particularly focuses on the BSI (British Standards Institute) dry arc resistance test and BSI wet arc tracking.

  5. Systems Analysis Teaching: The Kengor Wire Company

    ERIC Educational Resources Information Center

    Kennedy, W. J., Jr.; Derrick, L. R.

    1976-01-01

    Describes a group of systems analysis courses which utilizes a computer model of a company which makes house wire to provide a realistic representation of the complexities involved in industrial management. (CP)

  6. Endstates in multichannel spinless p-wave superconducting wires

    NASA Astrophysics Data System (ADS)

    Rieder, M.-T.; Kells, G.; Duckheim, M.; Meidan, D.; Brouwer, P. W.

    2012-09-01

    Multimode spinless p-wave superconducting wires with a width W much smaller than the superconducting coherence length ? are known to have multiple low-energy subgap states localized near the wire's ends. Here we compare the typical energies of such endstates for various terminations of the wire: A superconducting wire coupled to a normal-metal stub, a weakly disordered superconductor wire and a wire with smooth confinement. Depending on the termination, we find that the energies of the subgap states can be higher or lower than for the case of a rectangular wire with hard-wall boundaries.

  7. Air flow sensing using micro-wire-bonded hair-like hot-wire anemometry

    NASA Astrophysics Data System (ADS)

    Sadeghi, M. M.; Peterson, R. L.; Najafi, K.

    2013-08-01

    We introduce a novel, low-cost and high-performance hot-wire air flow sensor which utilizes a bond-wire as the sensing element. Standard wire-bonding methods are used to form the hot-wire sensor, similar to those used in post-process integrated circuit (IC) packaging, so sensor fabrication is IC-compatible. The bond-wire extends above the surface of the substrate, saving the valuable chip area and allowing the formation of dense arrays of sensors for this and other applications such as inertial sensors. This hair-like hot-wire anemometer offers high accuracy, high sensitivity and wide dynamic range. Fabricated aluminum and platinum wire flow sensors have a measurement range from 1 cm s-1 to 17.5 m s-1, with an accuracy of 0.06% (platinum wire, 3.3 V) in the low flow regime (<50 cm s-1) and 2.5% (aluminum wire, 3.3 V) in the high flow regime (>2 m s-1).

  8. A Magnetic Sensor with Amorphous Wire

    PubMed Central

    He, Dongfeng; Shiwa, Mitsuharu

    2014-01-01

    Using a FeCoSiB amorphous wire and a coil wrapped around it, we have developed a sensitive magnetic sensor. When a 5 mm long amorphous wire with the diameter of 0.1 mm was used, the magnetic field noise spectrum of the sensor was about 30 pT/?Hz above 30 Hz. To show the sensitivity and the spatial resolution, the magnetic field of a thousand Japanese yen was scanned with the magnetic sensor. PMID:24940865

  9. Image beam from a wire laser

    NASA Astrophysics Data System (ADS)

    Orlova, E. E.; Hovenier, J. N.; de Visser, P. J.; Gao, J. R.

    2015-05-01

    We demonstrate the formation of a narrow beam from a long (L ?? ) laser with subwavelength transverse dimensions (wire laser) as an image of the subwavelength laser waveguide formed by a spherical lens. The beam is linearly diverging with the angle determined by the ratio of the wavelength to the lens radius, while the minimum beam spot size is the same as that of the image of a point source. We realize such a beam experimentally using a terahertz quantum cascade wire laser.

  10. Multiple crossovers in interacting quantum wires

    NASA Astrophysics Data System (ADS)

    Kindermann, M.; Brouwer, P. W.

    2006-09-01

    We study tunneling of electrons into and between interacting wires in the spin-incoherent regime subject to a magnetic field. The tunneling currents follow power laws of the applied voltage with exponents that depend on whether the electron spins at the relevant length scales are polarized or disordered. The crossover length (or energy) scale is exponential in the applied field. In a finite-size wire multiple crossovers can occur.

  11. Problems with aging wiring in Naval aircraft

    NASA Technical Reports Server (NTRS)

    Campbell, Frank J.

    1994-01-01

    The Navy is experiencing a severe aircraft electrical wiring maintenance problem as a result of the extensive use of an aromatic polyimide insulation that is deteriorating at a rate that was unexpected when this wire was initially selected. This problem has significantly affected readiness, reliability, and safety and has greatly increased the cost of ownership of Naval aircraft. Failures in wire harnesses have exhibited arcing and burning that will propagate drastically, to the interruption of many electrical circuits from a fault initiated by the failure of deteriorating wires. There is an urgent need for a capability to schedule aircraft rewiring in an orderly manner with a logically derived determination of which aircraft have aged to the point of absolute necessity. Excessive maintenance was demonstrated to result from the accelerated aging due to the parameters of moisture, temperature, and strain that exist in the Naval Aircraft environment. Laboratory studies have demonstrated that MIL-W-81381 wire insulation when aged at high humidities followed the classical Arrhenius thermal aging relationship. In an extension of the project a multifactor formula was developed that is now capable of predicting life under varying conditions of these service parameters. An automated test system has also been developed to analyze the degree of deterioration that has occurred in wires taken from an aircraft in order to obtain an assessment of remaining life. Since it is both physically and financially impossible to replace the wiring in all the Navy's aircraft at once, this system will permit expedient scheduling so that those aircraft that are most probable to have wiring failure problems can be overhauled first.

  12. Fabrication of terahertz wire-grid polarizers.

    PubMed

    Partanen, Anni; Väyrynen, Juha; Hassinen, Sami; Tuovinen, Hemmo; Mutanen, Jarkko; Itkonen, Tommi; Silfsten, Pertti; Pääkkönen, Pertti; Kuittinen, Markku; Mönkkönen, Kari; Venäläinen, Tapani

    2012-12-10

    Wire-grid polarizers for terahertz region were fabricated by manufacturing triangular grating using a ruling-based, ultraprecision diamond machining process and replicating the pattern into polymethylpentene (TPX) and cyklo-olefin copolymer (COC) sheets using hot embossing. On top of the imprinted structures, aluminum was evaporated in an oblique angle, forming an aluminum wire grid. The achieved extinction rate was over 150 for TPX polarizers and near 1000 for COC polarizers. PMID:23262530

  13. Free abrasive wire saw machining of ceramics

    Microsoft Academic Search

    C. Y. Hsu; C. S. Chen; C. C. Tsao

    2009-01-01

    Currently, many kinds of ceramics are used in advanced industrial fields due to their superior mechanical properties, such\\u000a as thermal, wear, corrosion resistance, and lightweight features. Wire saw machining ceramic (Al2O3) was investigated by ultrasonic vibration in this study. Taguchi approach is a powerful design tool for high-quality systems.\\u000a Material removal rate, wafer surface roughness, steel wire wear, kerf width,

  14. Gold wire bonding onto flexible polymeric substrates

    Microsoft Academic Search

    E. Hall; A. M. Lyons; J. D. Weld

    1996-01-01

    As part of a program to develop very thin, low cost packages using available technology, copper clad polymeric materials were examined as potential substrates for high temperature wire bonded chip-on-flex circuits. New thermoplastic flex and a PTFE\\/woven glass substrate were evaluated along with polyimides using high temperature copper laminate adhesives and adhesiveless constructions. Initial wire bond pull tests indicated all

  15. Exploiting level sensitive latches in wire pipelining 

    E-print Network

    Seth, Vikram

    2005-02-17

    interconnect delay allowed between two flip-flops is T -Tsetup - Tprop -Tskew. Hence, the minimal latency uv for flip-flop based pipelined wire (u,v) is give by: 1 -= skewpropsetup uv uv TTTT tl (1) When latches... in one cycle. Then the only delay overhead in addition to the interconnect delay will be the propagation delay T?prop of a latch. Therefore, the minimal feasible latency ?uv for latched based pipelined wire (u,v) is: 7 1...

  16. Tracking with wire chambers at the SSC

    SciTech Connect

    Hanson, G.G.; Gundy, M.C.; Palounek, A.P.T.

    1989-07-01

    Limitations placed on wire chambers by radiation damage and rate requirements in the SSC environment are reviewed. Possible conceptual designs for wire chamber tacking systems that meet these requirements are discussed. Computer simulation studies of tracking in such systems are presented. Simulations of events from interesting physics at the SSC, including hits from minimum bias background events, are examined. Results of some preliminary pattern recognition studies are given. 13 refs., 11 fig., 1 tab.

  17. Wireless Extensions of Wired Industrial Communications Networks

    Microsoft Academic Search

    Gianluca Cena; Adriano Valenzano; Stefano Vitturi

    2007-01-01

    Wireless (sub)networks are becoming appealing for their characteristics also for the industrial automation and manufacturing scenarios. Since they cannot be considered as a total replacement for more traditional wired communications, at least in the short\\/mid-term, it is worth focusing on their integration with popular industrial wired solutions in order to achieve efficiency and performance for the overall networked system. This

  18. Optical interconnect on printed wiring board

    Microsoft Academic Search

    Mikko Karppinen; Jukka-Tapani Makinen; Kari Kataja; Antti Tanskanen; Teemu Alajoki; Pentti Karioja; Marika Immonen; Jorma Kivilahti

    2004-01-01

    Integration of high-speed parallel optical interconnects into printed wiring boards (PWB) is studied. The aim is a hybrid optical-electrical board including both electrical wiring and embedded polymer waveguides. Robust optical coupling between the waveguide and the emitter\\/detector should be achieved by the use of automated pick-and-place assembly. Different coupling schemes were analyzed by combining non-sequential ray tracing with Monte-Carlo tolerance

  19. Embedded optical interconnect on printed wiring board

    Microsoft Academic Search

    Mikko Karppinen; Jukka-Tapani Makinen; Kari Kataja; Antti Tanskanen; Teemu Alajoki; Pentti Karioja; Marika Immonen; Jorma Kivilahti

    2004-01-01

    Integration of high-speed parallel optical interconnects into printed wiring boards (PWB) is studied. The aim is a hybrid optical-electrical board including both electrical wiring and embedded polymer waveguides. Robust optical coupling between the waveguide and the emitter\\/detector should be achieved by the use of automated pick-and-place assembly. Different coupling schemes were analyzed by combining non-sequential ray tracing with Monte-Carlo tolerance

  20. Recognition of On-Line Handwritten Commutative Diagrams

    Microsoft Academic Search

    Andreas Stoffel; Ernesto Tapia; Ra ´ ul Rojas

    2009-01-01

    We present a method for the recognition of on-line hand- written commutative diagrams. Diagrams are formed with arrows that join relatively simple mathematical expressions. Diagram recognition consists in grouping isolated symbols into simple expressions, recognizing the arrows that join such expressions, and finding the layout that best describes the diagram. We model the layout of the diagram with a grid

  1. INCOMING WIRE/ACH University units expecting to receive funds via wire or ACH (Automated Clearing House) should inform the

    E-print Network

    Arnold, Jonathan

    INCOMING WIRE/ACH University units expecting to receive funds via wire or ACH (Automated Clearing form. The Bursar's Office cannot properly record there funds until University units provide deposit Transmittal and fax the completed form to 706-583-0832. OUTGOING WIRES University units needing to wire funds

  2. Needleless electrospinning with twisted wire spinneret.

    PubMed

    Holopainen, Jani; Penttinen, Toni; Santala, Eero; Ritala, Mikko

    2015-01-16

    A needleless electrospinning setup named 'Needleless Twisted Wire Electrospinning' was developed. The polymer solution is electrospun from the surface of a twisted wire set to a high voltage and collected on a cylindrical collector around the wire. Multiple Taylor cones are simultaneously self-formed on the downward flowing solution. The system is robust and simple with no moving parts aside from the syringe pump used to transport the solution to the top of the wire. The structure and process parameters of the setup and the results on the preparation of polyvinyl pyrrolidone (PVP), hydroxyapatite (HA) and bioglass fibers with the setup are presented. PVP fiber sheets with areas of 40 × 120 cm(2) and masses up to 1.15 g were prepared. High production rates of 5.23 g h(-1) and 1.40 g h(-1) were achieved for PVP and HA respectively. The major limiting factor of the setup is drying of the polymer solution on the wire during the electrospinning process which will eventually force to interrupt the process for cleaning of the wire. Possible solutions to this problem and other ways to develop the setup are discussed. The presented system provides a simple way to increase the production rate and area of fiber sheet as compared with the conventional needle electrospinning. PMID:25513842

  3. Needleless electrospinning with twisted wire spinneret

    NASA Astrophysics Data System (ADS)

    Holopainen, Jani; Penttinen, Toni; Santala, Eero; Ritala, Mikko

    2015-01-01

    A needleless electrospinning setup named ‘Needleless Twisted Wire Electrospinning’ was developed. The polymer solution is electrospun from the surface of a twisted wire set to a high voltage and collected on a cylindrical collector around the wire. Multiple Taylor cones are simultaneously self-formed on the downward flowing solution. The system is robust and simple with no moving parts aside from the syringe pump used to transport the solution to the top of the wire. The structure and process parameters of the setup and the results on the preparation of polyvinyl pyrrolidone (PVP), hydroxyapatite (HA) and bioglass fibers with the setup are presented. PVP fiber sheets with areas of 40 × 120 cm2 and masses up to 1.15 g were prepared. High production rates of 5.23 g h?1 and 1.40 g h?1 were achieved for PVP and HA respectively. The major limiting factor of the setup is drying of the polymer solution on the wire during the electrospinning process which will eventually force to interrupt the process for cleaning of the wire. Possible solutions to this problem and other ways to develop the setup are discussed. The presented system provides a simple way to increase the production rate and area of fiber sheet as compared with the conventional needle electrospinning.

  4. Wiring design for the control of electromagnetic interference (EMI)

    NASA Technical Reports Server (NTRS)

    Kopasakis, George

    1995-01-01

    Wiring design is only one important aspect of EMI control. Other important areas for EMI are: circuit design, filtering, grounding, bonding, shielding, lighting, electrostatic discharge (ESD), transient suppression, and electromagnetic pulse (EMP). Topics covered include: wire magnetic field emissions at low frequencies; wire radiated magnetic field emissions at frequencies; wire design guidelines for EMI control; wire design guidelines for EMI control; high frequency emissions from cables; and pulse frequency spectra.

  5. Phase diagram of coupled ladders

    NASA Astrophysics Data System (ADS)

    Müller, T. F. A.; Rice, T. M.

    1998-08-01

    The two-leg t-J ladder forms a spin liquid at half filling that evolves to a Luther-Emery liquid upon doping. Our aim is to obtain a complete phase diagram for isotropic coupling (i.e., rungs and legs equal) as a function of electron density n and the ratio J/t. Two known limiting cases are n<12, which is a single band Luttinger liquid, and small hole doping ?<<1 for J/t-->0, which is a Nagaoka ferromagnet. Using Lanczos techniques we examine the region between the Nagaoka and Luther-Emery phases for 1>n>12. We find evidences for gapless behavior in both spin and charge channels for J/t<0.3, consistent with Luttinger liquids in both bonding and antibonding bands (i.e., C2S2). This proposal is based on the behavior of spin and charge correlation functions. For example, the hole-hole correlation function that displays hole pairing at larger J/t shows hole-hole repulsion in this region. As a further test, we examined the dependence of the energy on a relative phase shift between bonding and antibonding bands. For J/t<0.3 this is very weak, indicating a lack of pairing between these channels.

  6. A Hubble Diagram for Quasars

    E-print Network

    Risaliti, Guido

    2015-01-01

    We present a new method to test the cosmological model, and to estimate the cosmological parameters, based on the non-linear relation between ultraviolet and X-ray luminosity of quasars. We built a data set of ~1,250 quasars by merging several literature samples with X-ray measurements at 2 keV and SDSS photometry, which was used to estimate the extinction-corrected 2500~\\AA\\ flux. We obtained three main results: (1) we checked the non-linear relation between X-ray and UV luminosities in small redshift bins up to z~6, confirming that it holds at all redshifts with the same slope; (2) we built a Hubble diagram for quasars up to z~6, which is well matched to that of supernovae in the common z=0-1.4 redshift interval, and extends the test of the cosmological model up to z~6; (3) we showed that this non-linear relation is a powerful tool to estimate cosmological parameters. With present data, assuming a $\\Lambda$CDM model, we obtain $\\Omega_M$=0.21$^{+0.08}_{-0.10}$ and $\\Omega_\\Lambda$=0.95$^{+0.30}_{-0.20}$ ($\\...

  7. The Amplituhedron from Momentum Twistor Diagrams

    E-print Network

    Yuntao Bai; Song He

    2014-08-11

    We propose a new diagrammatic formulation of the all-loop scattering amplitudes/Wilson loops in planar N=4 SYM, dubbed the "momentum-twistor diagrams". These are on-shell-diagrams obtained by gluing trivalent black and white vertices defined in momentum twistor space, which, in the reduced diagram case, are known to be related to diagrams in the original twistor space. The new diagrams are manifestly Yangian invariant, and they naturally represent factorization and forward-limit contributions in the all-loop BCFW recursion relations in momentum twistor space, in a fashion that is completely different from those in momentum space. We show how to construct and evaluate momentum-twistor diagrams, and how to use them to obtain tree-level amplitudes and loop-level integrands; in particular for the latter we identify an isolated bubble-structure for each loop variable, arising from a forward limit, or entangled removal of particles. From a given diagram one can directly read off the C, D matrices via a generalized "boundary measurement"; this in turn determines a cell in the amplituhedron associated with the amplitude, and our diagrammatic representations of the amplitude can provide triangulations of the amplituhedron with generally very intricate geometries. To demonstrate the computational power of the formalism, we give explicit results for general two-loop integrands, and the cells of the complete amplituhedron for two-loop MHV amplitudes.

  8. Ensuring Wire Alignment for the New COMPASS Drift Chamber

    NASA Astrophysics Data System (ADS)

    Cromis, Megan; Compass Dc5 Team

    2014-09-01

    COMPASS is a fixed-target experiment at CERN investigating the internal structure of the proton. Polarized Drell-Yan measurements at COMPASS will explore how the quark orbital angular momentum contributes to the spin of the proton. To enable this measurement, several straw tube chambers need to be replaced due to long term wear. One of the replacement chambers, drift chamber DC5, is being built at Old Dominion University based on a prototype from UIUC and existing COMPASS drift chambers. DC5 consists of 4 wire planes with 513 wires (256 [20 ?m] sense wires and 257 [100 ?m] field wires alternating) and 4 wire planes at a 10 degree offset with 641 wires each. Each of these 4616 wires need to be aligned within either 100 ?m (sense wire) or 200 ?m (field wire) of the center of the solder pad to ensure the accuracy of the drift chamber. Problems that arose during stringing include initial alignment of the wire and efficient soldering techniques. Also, because the field wires charged at -1750 volts will be 4 mm from the sense wires, there should be no gaps or points in the solder to prevent arcing. This poster will discuss the alignment techniques, soldering methods, testing, and repair process for the wires. COMPASS is a fixed-target experiment at CERN investigating the internal structure of the proton. Polarized Drell-Yan measurements at COMPASS will explore how the quark orbital angular momentum contributes to the spin of the proton. To enable this measurement, several straw tube chambers need to be replaced due to long term wear. One of the replacement chambers, drift chamber DC5, is being built at Old Dominion University based on a prototype from UIUC and existing COMPASS drift chambers. DC5 consists of 4 wire planes with 513 wires (256 [20 ?m] sense wires and 257 [100 ?m] field wires alternating) and 4 wire planes at a 10 degree offset with 641 wires each. Each of these 4616 wires need to be aligned within either 100 ?m (sense wire) or 200 ?m (field wire) of the center of the solder pad to ensure the accuracy of the drift chamber. Problems that arose during stringing include initial alignment of the wire and efficient soldering techniques. Also, because the field wires charged at -1750 volts will be 4 mm from the sense wires, there should be no gaps or points in the solder to prevent arcing. This poster will discuss the alignment techniques, soldering methods, testing, and repair process for the wires. This research was supported in part by the DOE under Grant Number DE-FG03-94ER40860.

  9. Method for constructing theoretical phase diagrams for tetramethylammonium family crystals

    NASA Astrophysics Data System (ADS)

    Sannikov, D. G.

    2012-11-01

    A method for constructing theoretical phase diagrams for tetramethylammonium family crystals is proposed. Temperature-pressure phase diagrams are constructed for different crystals of this family and compared with experimental diagrams. The assumptions and approximations of the method are discussed.

  10. Fundamental Diagram Calibration: A Stochastic Approach to Linear Fitting

    E-print Network

    Horowitz, Roberto

    Fundamental Diagram Calibration: A Stochastic Approach to Linear Fitting Brian Phegley Department methodology is proposed for characterizing and identifying key parameters of the fundamental diagram on traffic data obtained from a vehicle detection station. The proposed fundamental diagram characterization

  11. 30 CFR 75.906 - Trailing cables for mobile equipment, ground wires, and ground check wires.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Trailing cables for mobile equipment, ground wires, and ground...Circuits § 75.906 Trailing cables for mobile equipment, ground wires, and ground...Statutory Provisions] Trailing cables for mobile equipment shall contain one or more...

  12. Investigation of Thermosonic Wire Bonding Resistance of Gold Wire Onto Copper Pad

    Microsoft Academic Search

    Yeau-Ren Jeng; Sang-Mao Chiu; Pay-Yau Huang; Shiuh-Hwa Shyu

    2010-01-01

    This paper discusses the electric performance for thermosonic wire bonding of gold wire onto copper pads. Various methods normally used to improve bondability were investigated including the bare copper pads with argon shielding gas and the copper pads with cupric oxide film, cuprous oxide film, and silver film. The micro-contact theory was used to determine the effective contact area. The

  13. Cost comparison for flip chip, gold wire bond, and copper wire bond packaging

    Microsoft Academic Search

    Chet A. Palesko; E. Jan Vardaman

    2010-01-01

    When the cost of gold was $500 per ounce, the lowest cost packaging choice was clear-it was always gold wire bonding. However, with the cost of gold at more than $1,000 per ounce and significant cost decreases in flip chip package fabrication and assembly, the lowest cost packaging choice is no longer obvious. Gold wire bonding is one of the

  14. Thermosonic wire bonding of gold wire onto copper pad using the saturated interfacial phenomena

    Microsoft Academic Search

    Yeau-Ren Jeng; Jong-Hing Aoh; Chang-Ming Wang

    2001-01-01

    Copper has been used to replace conventional aluminium interconnection to improve the performance of deep submicron integrated circuits. This study used the saturated interfacial phenomena found in thermosonic ball bonding of gold wire onto aluminium pad to investigate thermosonic ball bonding of gold wire onto copper pad. The effects of preheat temperatures and ultrasonic powers on the bonding force were

  15. STRS SpaceWire FPGA Module

    NASA Technical Reports Server (NTRS)

    Lux, James P.; Taylor, Gregory H.; Lang, Minh; Stern, Ryan A.

    2011-01-01

    An FPGA module leverages the previous work from Goddard Space Flight Center (GSFC) relating to NASA s Space Telecommunications Radio System (STRS) project. The STRS SpaceWire FPGA Module is written in the Verilog Register Transfer Level (RTL) language, and it encapsulates an unmodified GSFC core (which is written in VHDL). The module has the necessary inputs/outputs (I/Os) and parameters to integrate seamlessly with the SPARC I/O FPGA Interface module (also developed for the STRS operating environment, OE). Software running on the SPARC processor can access the configuration and status registers within the SpaceWire module. This allows software to control and monitor the SpaceWire functions, but it is also used to give software direct access to what is transmitted and received through the link. SpaceWire data characters can be sent/received through the software interface, as well as through the dedicated interface on the GSFC core. Similarly, SpaceWire time codes can be sent/received through the software interface or through a dedicated interface on the core. This innovation is designed for plug-and-play integration in the STRS OE. The SpaceWire module simplifies the interfaces to the GSFC core, and synchronizes all I/O to a single clock. An interrupt output (with optional masking) identifies time-sensitive events within the module. Test modes were added to allow internal loopback of the SpaceWire link and internal loopback of the client-side data interface.

  16. Dust Devil Schematic

    NASA Technical Reports Server (NTRS)

    1997-01-01

    This graphic illustrates the wind pattern in a dust devil, and presents the characteristic pressure and wind speed signatures expected if a dust devil were to pass directly over the lander. A dust devil is driven by warm air rising from the surface which is heated by the sun. If one passes over the lander, strong winds are expected first from one direction and then from the opposite direction. Surface pressure should also fall to a minimum at the center of the dust devil.

  17. Investigation of factors affecting the heater wire method of calibrating fine wire thermocouples

    NASA Technical Reports Server (NTRS)

    Keshock, E. G.

    1972-01-01

    An analytical investigation was made of a transient method of calibrating fine wire thermocouples. The system consisted of a 10 mil diameter standard thermocouple (Pt, Pt-13% Rh) and an 0.8 mil diameter chromel-alumel thermocouple attached to a 20 mil diameter electrically heated platinum wire. The calibration procedure consisted of electrically heating the wire to approximately 2500 F within about a seven-second period in an environment approximating atmospheric conditions at 120,000 feet. Rapid periodic readout of the standard and fine wire thermocouple signals permitted a comparison of the two temperature indications. An analysis was performed which indicated that the temperature distortion at the heater wire produced by the thermocouple junctions appears to be of negligible magnitude. Consequently, the calibration technique appears to be basically sound, although several practical changes which appear desirable are presented and discussed. Additional investigation is warranted to evaluate radiation effects and transient response characteristics.

  18. Selected developments in laser wire stripping. [cutting insulation from aerospace-type wires and cables

    NASA Technical Reports Server (NTRS)

    1977-01-01

    The operation of mechanical and thermal strippers and the early development of laser wire strippers are reviewed. NASA sponsored development of laser wire stripping for space shuttle includes bench-type strippers as well as an advanced portable hand-held stripper which incorporates a miniaturized carbon dioxide laser and a rotating optics unit with a gas-jet assist and debris exhaust. Drives and controls girdle the wire and slit the remaining slug without manual assistance. This unit can strip wire sizes 26 through 12 gage. A larger-capacity hand-held unit for wire sizes through 1/0 gage was built using a neodynium-doped yttrium aluminum garnet (Nd:YAG) laser. The hand-held units have a flexible umbilical cable to an accompanying cart that carries the power supply, gas supply, cooling unit, and the controls.

  19. Frequency response of a thermocouple wire: Effects of axial conduction

    NASA Technical Reports Server (NTRS)

    Forney, L. J.; Fralick, G. C.

    1990-01-01

    Theoretical expressions are derived for the steady-state frequency response of a thermocouple wire. In particular, the effects of axial heat conduction are demonstrated for both a uniform thermocouple wire and a nonuniform wire with unequal material properties and wire diameters across the junction. For the case of a uniform wire, the amplitude ratio and phase angle compare favorably with the series solution of Scadron and Warshawsky (1952) except near the ends of the wire. For the case of a non-uniform wire, the amplitude ratio at low frequency omega yields 0 agrees with the results of Scadron and Warshawsky for a steady-state temperature distribution. Moreover, the frequency response for a non-uniform wire in the limit of infinite length l yields infinity is shown to reduce to a simple expression that is analogous to the classic first order solution for a thermocouple wire with uniform properties.

  20. Reliable commercial HTS wire for power applications

    NASA Astrophysics Data System (ADS)

    Kellers, Jürgen; Masur, Lawrence J.

    2002-08-01

    The production of HTS wire for power applications is increasingly maturing into industrial dimensions. The most widely considered manufacturing method for this conductor is the BSCCO-2223-OPIT route, used internationally by many organizations, including American Superconductor. Significant advances in HTS wire technology have been made in the past years, with currently a guaranteed minimum critical current performance of 115 A at 77 K over commercial long length. For the HTS wire itself this is equivalent to an engineering current density of 13.5 kA/cm 2. During the past 18 months, American Superconductor increased its HTS wire manufacturing capacity in its Westborough operations from 250 to 500 km/year to meet the increased demand for development and demonstration purposes. While this level of quality and quantity is sufficient to demonstrate technical feasibility and reliability of prototype power applications, it cannot satisfy fully commercial requirements for economic viability. To address broader markets with a commercially viable product, a price level of $50/(kA m) is possible with BSCCO-2223-OPIT when manufactured in much larger quantities. Therefore, American Superconductor is currently siting a new facility dedicated solely to the manufacturing of BSCCO-OPIT-2223 wire in quantities of 10,000 km/year. Key initial applications for this wire are power transmission cables, industrial motors and electrical generators. This paper will report on the performance and reliability testing of BSCCO-2223 wires. We will discuss the electrical, bending, tensile, and fatigue testing results of wires manufactured for applications such as American Superconductor's 5000 hp ultra-compact motor. Due to their compactness, these motors will be less expensive to manufacture compared with conventional motors and will be more energy efficient. We will also review the stringent electrical, mechanical, and environmental testing developed jointly by American Superconductor and Pirelli Cables and Systems for simulating the behavior of HTS wires under the actual operating conditions for an underground power cable. Also, we will give an update of the status of our new manufacturing plant which is planned to be operational in 2002.

  1. Wire scanner software and firmware issues

    SciTech Connect

    Gilpatrick, John Doug [Los Alamos National Laboratory

    2008-01-01

    The Los Alamos Neutron Science Center facility presently has 110 slow wire scanning profile measurement instruments located along its various beam lines. These wire scanners were developed and have been operating for at least 30 years. While the wire scanners solved many problems to operate and have served the facility well they have increasingly suffered from several problems or limitations, such as maintenance and reliability problems, antiquated components, slow data acquisition, and etc. In order to refurbish these devices, these wire scanners will be replaced with newer versions. The replacement will consist of a completely new beam line actuator, new cables, new electronics and brand new software and firmware. This note describes the functions and modes of operation that LabVIEW VI software on the real time controller and FPGA LabVIEW firmware will be required. It will be especially interesting to understand the overall architecture of these LabVIEW VIs. While this note will endeavor to describe all of the requirements and issues for the wire scanners, undoubtedly, there will be missing details that will be added as time progresses.

  2. Phase diagram to design passive nanostructures

    E-print Network

    Lee, Jeng Yi

    2015-01-01

    A phase diagram, defined by the amplitude square and phase of scattering coefficients for absorption cross-section in each individual channel, is introduced as a universal map on the electromagnetic properties for passive scatterers. General physical bounds are naturally revealed based on the intrinsic power conservation in a passive scattering system, entailing power competitions among scattering, absorption, and extinction. Exotic scattering and absorption phenomena, from resonant scattering, invisible cloaking, coherent perfect absorber, and subwavelength superscattering can all be illustrated in this phase diagram. With electrically small core-shell scatterers as an example, we demonstrate a systematic method to design field-controllable structures based on the allowed trajectories in the phase diagram. The proposed phase diagram not only provides a simple tool to design optical devices but also promotes a deep understanding on Mie's scattering theory.

  3. x DYNAMIC INFLUENCE DIAGRAMS: APPLICATIONS TO

    E-print Network

    Hazen, Gordon

    hip arthroplasty. CHN.1 INTRODUCTION Influence diagrams are well-known graphical tools for formulating, including a previously published cost-effectiveness analysis for total hip replacement. Keywords: Influence

  4. Sequential influence diagrams: A unified asymmetry framework

    E-print Network

    Jensen, Finn V.; Nielsen, Thomas D.; Shenoy, Prakash P.

    2006-05-01

    We describe a new graphical language for specifying asymmetric decision problems. The language is based on a filtered merge of several existing languages including sequential valuation networks, asymmetric influence diagrams, and unconstrained...

  5. ConcepTest: Relative Time Diagram #4

    NSDL National Science Digital Library

    Match the features in the relative time diagram below with the events described in the short sentence. Assume all rocks are sedimentary unless otherwise indicated. Which sedimentary unit did not experience contact ...

  6. A Feynman diagram analyzer DIANA: recent development

    E-print Network

    M. Tentyukov; J. Fleischer

    2002-10-11

    New developments concerning the extension of the Feynman diagram analyzer DIANA are presented. We discuss new graphic facilities, application of DIANA to processes with Majorana fermions and different approaches to automation of momenta distribution.

  7. Communicating Phylogeny: Evolutionary Tree Diagrams in Museums

    E-print Network

    MacDonald, Teresa; Wiley, Edward O.

    2012-01-01

    Tree of life diagrams are graphic representations of phylogeny—the evolutionary history and relationships of lineages—and as such these graphics have the potential to convey key evolutionary ideas and principles to a variety of audiences. Museums...

  8. Architecture flow diagrams under teamwork reg sign

    SciTech Connect

    Nicinski, T.

    1992-02-01

    The Teamwork CASE tool allows Data Flow Diagrams (DFDs) to be maintained for structured analysis. Fermilab has extended teamwork under UNIX{trademark} to permit Hatley and Pirbhai Architecture Flow Diagrams (AFDs) to be associated with DFDs and subsequently maintained. This extension, called TWKAFD, allows a user to open an AFD, graphically edit it, and replace it into a TWKAFD maintained library. Other aspects of Hatley and Pirbhai's methodology are supported. This paper presents a quick tutorial on Architecture Diagrams. It then describes the user's view of TWKAFD, the experience incorporating it into teamwork, and the successes with using the Architecture Diagram methodology along with the shortcomings of using the teamwork/TWKAFD tool. 8 refs.

  9. ConcepTest: Relative Time Diagram #1

    NSDL National Science Digital Library

    Match the features in the relative time diagram below with the events described in the short sentence. Assume all rocks are sedimentary unless otherwise indicated. Which is the oldest rock unit? a. A b. B c. C d. D ...

  10. Revised Diagnostic Diagrams for Planetary Nebulae

    E-print Network

    H. Riesgo; J. A. López

    2006-02-08

    Diagnostic diagrams of electron density - excitation for a sample of 613 planetary nebulae are presented. The present extensive sample allows the definition of new statistical limits for the distribution of planetary nebulae in the log [Ha/[SII

  11. A Smart Thermal Block Diagram Tool

    NASA Technical Reports Server (NTRS)

    Tsuyuki, Glenn; Miyake, Robert; Dodge, Kyle

    2008-01-01

    The presentation describes a Smart Thermal Block Diagram Tool. It is used by JPL's Team X in studying missions during the Pre-Phase A. It helps generate cost and mass estimates using proprietary data bases.

  12. ConcepTest: Relative Time Diagram #2

    NSDL National Science Digital Library

    Match the features in the relative time diagram below with the events described in the short sentences. Assume all rocks are sedimentary unless otherwise indicated. Which unit was formed before A but after E? a. C ...

  13. Attribute Reduction Based on Property Pictorial Diagram

    PubMed Central

    Wan, Qing; Wei, Ling

    2014-01-01

    This paper mainly studies attribute reduction which keeps the lattice structure in formal contexts based on the property pictorial diagram. Firstly, the property pictorial diagram of a formal context is defined. Based on such diagram, an attribute reduction approach of concept lattice is achieved. Then, through the relation between an original formal context and its complementary context, an attribute reduct of complementary context concept lattice is obtained, which is also based on the property pictorial diagram of the original formal context. Finally, attribute reducts in property oriented concept lattice and object oriented concept lattice can be acquired by the relations of attribute reduction between these two lattices and concept lattice of complementary context. In addition, a detailed illustrative example is presented. PMID:25247200

  14. Sequential Influence Diagrams: A Unified Asymmetry Framework

    E-print Network

    Jensen, Finn V.; Nielsen, Thomas D.; Shenoy, Prakash P.

    2004-10-01

    We describe a new graphical language for specifying asymmetric decision problems. The language is based on a filtered merge of several existing languages including sequential valuation networks, asymmetric influence diagrams, ...

  15. Context Aware On-line Diagramming Recognition

    Microsoft Academic Search

    Mudit Agrawal; Alexander Zotov; Ming Ye; Sashi Raghupathy

    2010-01-01

    This paper presents a context aware, online immediate-mode diagramming recognition and beautification software for hand-sketched diagrams. The system is independent of stroke-order, -number, -direction and is invariant to scaling, translation and rotation. In our stroke-based recognition model, we propose convexity features along with spatial and temporal proximity features to prune the combinatorial search space of possible stroke configurations to form

  16. Campbell diagrams of weakly anisotropic flexible rotors

    Microsoft Academic Search

    Oleg N. Kirillov

    2009-01-01

    We consider an axi-symmetric rotor perturbed by dissipative, conservative,\\u000aand non-conservative positional forces originated at the contact with the\\u000aanisotropic stator. The Campbell diagram of the unperturbed system is a\\u000amesh-like structure in the frequency-speed plane with double eigenfrequencies\\u000aat the nodes. The diagram is convenient for the analysis of the traveling waves\\u000ain the rotating elastic continuum. Computing sensitivities

  17. Campbell diagrams of weakly anisotropic flexible rotors

    Microsoft Academic Search

    O. N. Kirillov

    2009-01-01

    We consider an axi-symmetric rotor perturbed by dissipative, conservative, and non-conservative positional forces originated at the contact with the anisotropic stator. The Campbell diagram of the unperturbed system is a mesh-like structure in the frequency-speed plane with double eigenfrequencies at the nodes. The diagram is convenient for the analysis of the traveling waves in the rotating elastic continuum. Computing sensitivities

  18. Diffusion and phase diagram in binary alloys

    Microsoft Academic Search

    J. Mimkes; M. Wuttig

    1996-01-01

    The relationship betwwen diffusion and phase diagram is discussed in more detail for Ag?Au and Au?Ni alloys. For each alloy tracer diffusion and interdiffusion data have been compared with the corresponding phase diagram.Tracer diffusion is related to the solid-liquid phase transition. Ag and Au tracer diffusivities D?(x) in Ag?Au alloys and melting temperature Tm(x) of Ag?Au show opposite curvatures. The

  19. Reliability computation from reliability block diagrams

    NASA Technical Reports Server (NTRS)

    Chelson, P. O.; Eckstein, R. E.

    1971-01-01

    A method and a computer program are presented to calculate probability of system success from an arbitrary reliability block diagram. The class of reliability block diagrams that can be handled include any active/standby combination of redundancy, and the computations include the effects of dormancy and switching in any standby redundancy. The mechanics of the program are based on an extension of the probability tree method of computing system probabilities.

  20. Algebraic decision diagrams and their applications

    Microsoft Academic Search

    R. Iris Bahar; Erica A. Frohm; Charles M. Gaona; Gary D. Hachtel; Enrico Macii; Abelardo Pardo; Fabio Somenzi

    1993-01-01

    In this paper we present theory and experiments on the AlgebraicDecision Diagrams (ADD's). These diagrams extend BDD'sby allowing values from an arbitrary finite domain to be associatedwith the terminal nodes. We present a treatment foundedin boolean algebras and discuss algorithms and results in applicationslike matrix multiplication and shortest path algorithms.Furthermore, we outline possible applications of ADD's to logicsynthesis, formal verification,