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1

Schematic diagram of (VDT) - open throat design  

NASA Technical Reports Server (NTRS)

Schematic diagram of Variable-Density Tunnel (VDT) - open throat design. Eastman Jacobs and Ira Abbott note in NACA TR 416 (p. 305) that a serious fire destroyed the tunnel (not the steel shell) in August 1927. The original design had a closed-throat test section five feet in diameter. After the fire it was decided to convert to an open throat design as depicted here. Jacobs and Abbott reported that this design was not satisfactory. 'The difficulties, which included excessive vibration, unsteady velocity at the test section, a rather large pressure gradient along the axis of the test section, and excessive effects of extraneous air currents on the balance, were overcome by rebuilding parts of the tunnel.' L2742.03: After a fire in August 1927 destroyed the VDT (not the steel shell), engineers decided to replace the original closed throat design with an open throat test section. This was wholly unsatisfactory and was immediately replaced with a new closed-throat design. Eastman Jacobs and Ira Abbott wrote: 'The whole interior structure was changed to the closed-throat type. A new exit cone having a smaller divergence angle and a new entrance cone having a better form were built. The synchronous-drive motor was replaced by a direct-current motor. These changes were completed in December, 1930.' (NACA TR No. 416, p. 305)

1928-01-01

2

On the history of meridional overturning circulation schematic diagrams  

Microsoft Academic Search

Recent global warming caused by humans and the prediction of a reduced Atlantic Ocean meridional overturning circulation in the future has increased interest in the role of the overturning circulation in climate change. A schematic diagram of the overturning circulation called the “Great Ocean Conveyor Belt,” published by Wallace Broecker in 1987, has become a popular image that emphasizes the

Philip L. Richardson

2008-01-01

3

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

4

NUCPLOT: a program to generate schematic diagrams of protein-nucleic acid interactions.  

PubMed Central

Proteins that bind to DNA are found in all areas of genetic activity within the cell. To help understand how these proteins perform their various functions, it is useful to analyse which residues are involved in binding to the DNA and how they interact with the bases and sugar-phosphate backbone of nucleic acids. Here we describe a program called NUCPLOT which can automatically identify these interactions from the 3D atomic coordinates of the complex from a PDB file and generate a plot that shows all the interactions in a schematic manner. The program produces a PostScript output file representing hydrogen, van der Waals and covalent bonds between the protein and the DNA. The resulting diagram is both clear and simple and allows immediate identification of important interactions within the structure. It also facilitates comparison of binding found in different structures. NUCPLOT is a completely automatic program, which can be used for any protein-DNA complex and will also work for certain protein-RNA structures.

Luscombe, N M; Laskowski, R A; Thornton, J M

1997-01-01

5

Predicting Allostery Wiring Diagrams within Motor Proteins  

NASA Astrophysics Data System (ADS)

Motor proteins are intricate molecular machines that make use of allostery as a basis of their function. Fundamental questions in trying to understand the operational mechanism of the motors is, therefore, how allostery communicated is within the proteins, what are the pathways that transmit allosteric signals, how to model and predict them. We have proposed a normal-mode analysis based perturbation model that predicts the pathways based on the structure and chemical composition of the molecules. We use the model to investigate allosteric pathways (allostery wiring diagrams) within motor proteins myosin V and VI.

Tehver, Riina

2013-03-01

6

61. THREE LINE WIRING DIAGRAM, 33 KV & NO. 1 ...  

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

61. THREE LINE WIRING DIAGRAM, 33 KV & NO. 1 TRANS BANK, SANTA ANA NO. 1 HYDRO PLANT, OCTOBER 27, 1958. SCE drawing no. 428058-1. - Santa Ana River Hydroelectric System, SAR-1 Powerhouse, Redlands, San Bernardino County, CA

7

Network Legos: Building Blocks of Cellular Wiring Diagrams  

Microsoft Academic Search

ABSTRACT Publicly available datasets provide detailed and large-scale information,on multiple types of molecular,interaction networks,in a number,of model,organisms. The wiring diagrams composed,of these interaction networks,capture a static view of cellular state. An important challenge,in systems,biology,is obtaining,a dynamic,perspective on these networks,by integrating,them,with gene,expression,measurements,taken,under,multiple,conditions. We present a top-down,computational,approach,to identify building blocks of molecular interaction networks,by: (i) integrating gene,expression,measurements,for a particular disease state (e.g.,

T. M. Murali; Corban G. Rivera

2008-01-01

8

Network legos: building blocks of cellular wiring diagrams.  

PubMed

Publicly available datasets provide detailed and large-scale information on multiple types of molecular interaction networks in a number of model organisms. The wiring diagrams composed of these interaction networks capture a static view of cellular state. An important challenge in systems biology is obtaining a dynamic perspective on these networks by integrating them with gene expression measurements taken under multiple conditions. We present a top-down computational approach to identify building blocks of molecular interaction networks by: (i) integrating gene expression measurements for a particular disease state (e.g., leukemia) or experimental condition (e.g., treatment with growth serum) with molecular interactions to reveal an active network, which is the network of interactions active in the cell in that disease state or condition; and (ii) systematically combining active networks computed for different experimental conditions using set-theoretic formulae to reveal network legos, which are modules of coherently interacting genes and gene products in the wiring diagram. We propose efficient methods to compute active networks, systematically mine candidate legos, assess the statistical significance of these candidates, arrange them in a directed acyclic graph (DAG), and exploit the structure of the DAG to identify true network legos. We describe methods to assess the stability of our computations to changes in the input and to recover active networks by composing network legos. We analyze two human datasets using our method. A comparison of three leukemias demonstrates how a biologist can use our system to identify specific differences between these diseases. A larger-scale analysis of 13 distinct stresses illustrates our ability to compute the building blocks of the interaction networks activated in response to these stresses. Source code implementing our algorithms is available under version 2 of the GNU General Public License at http://bioinformatics.cs.vt.edu/ murali/software/network-lego. PMID:18707557

Murali, T M; Rivera, Corban G

2008-09-01

9

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)

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.

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

2014-08-01

10

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

NASA Technical Reports Server (NTRS)

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.

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

1974-01-01

11

Nano-Resolution X-ray Tomography for Deciphering Wiring Diagram of Mammalian Brain  

NASA Astrophysics Data System (ADS)

Neural circuits in the central nervous system are the substrate of various high-order brain functions. However, little is known about the mechanisms underlying neuronal information processing in the brain. Anatomical and functional graph structures of neural networks with actual connections will provide us with perspectives to elucidate the brain complexity. Here, we aim to develop a three-dimensional mouse brain atlas of neural circuits using nano-resolution x-ray tomography by synchrotron radiation. In addition to identifying a large number of synapses, our research will also clarify the structure of neuronal networks for understanding the most complex organ in the body. In this study, we observed metal-stained biological tissues of the mouse brain using hard x-ray Zernike-type phase-contrast microscopy with 60-nm resolution at SPring-8. As a result, the nano-resolution hard x-ray phase-contrast microscope revealed nerve fibers and organelles including mitochondria and synapses in the neural tissue. In the near future, this information will be utilized to begin deciphering the wiring diagram of the brain by using nano-resolution x-ray tomography.

Mizutani, H.; Sagara, H.; Takeuchi, A.; Ohigashi, T.; Yashiro, W.; Uesugi, K.; Suzuki, Y.; Momose, A.; Takagi, T.

2011-09-01

12

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

NASA Astrophysics Data System (ADS)

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.

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

2014-05-01

13

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

PubMed Central

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.

Swanson, Larry W.; Bota, Mihail

2010-01-01

14

NASA Bioreactor Schematic  

NASA Technical Reports Server (NTRS)

The schematic depicts the major elements and flow patterns inside the NASA Bioreactor system. Waste and fresh medium are contained in plastic bags placed side-by-side so the waste bag fills as the fresh medium bag is depleted. The compliance vessel contains a bladder to accommodate pressure transients that might damage the system. A peristolic pump moves fluid by squeezing the plastic tubing, thus avoiding potential contamination. The work is sponsored by NASA's Office of Biological and Physical Research. The bioreactor is managed by the Biotechnology Cell Science Program at NASA's Johnson Space Center (JSC). NASA-sponsored bioreactor research has been instrumental in helping scientists to better understand normal and cancerous tissue development. In cooperation with the medical community, the bioreactor design is being used to prepare better models of human colon, prostate, breast and ovarian tumors. Cartilage, bone marrow, heart muscle, skeletal muscle, pancreatic islet cells, liver and kidney are just a few of the normal tissues being cultured in rotating bioreactors by investigators.

2001-01-01

15

Bifurcation Diagram and Pattern Formation of Phase Slip Centers in Superconducting Wires Driven with Electric Currents  

Microsoft Academic Search

We provide here new insights into the classical problem of a one-dimensional superconducting wire exposed to an applied electric current using the time-dependent Ginzburg-Landau model. The most striking feature of this system is the well-known appearance of oscillatory solutions exhibiting phase slip centers (PSC's) where the order parameter vanishes. Retaining temperature and applied current as parameters, we present a simple

J. Rubinstein; P. Sternberg; Q. Ma

2007-01-01

16

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

NASA Technical Reports Server (NTRS)

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.

Weiss, W.

1979-01-01

17

Threshold States in Schematic Model.  

National Technical Information Service (NTIS)

In an extended Brown-Bolsterli schematic model the possibility of strength decoupling from the giant dipole resonance is shown. A part of the particle-hole excited states, the threshold states are supposed to have lower energy than the other normal states...

L. P. Csernai

1977-01-01

18

Radial Distribution Function (RDF) schematic  

NSDL National Science Digital Library

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.

Iacovella, Christopher R.

2006-09-28

19

Gender Schematic Development within the Family Context.  

ERIC Educational Resources Information Center

Organizing the world into masculine and feminine categories is a process called "gender schematicity." High gender schematicity has been linked with children's inclination to self-select out of certain learning opportunities that they deem gender-inappropriate. This study examined gender schematicity among kindergartners and fourth-graders and…

Sokal, Laura; Seifert, Kelvin; Piotrowski, Caroline

20

Assessing Schematic Knowledge of Introductory Probability Theory  

ERIC Educational Resources Information Center

The ability to identify schematic knowledge is an important goal for both assessment and instruction. In the current paper, schematic knowledge of statistical probability theory is explored from the declarative-procedural framework using multiple methods of assessment. A sample of 90 undergraduate introductory statistics students was required to…

Birney, Damian P.; Fogarty, Gerard J.; Plank, Ashley

2005-01-01

21

Schematic modeling for meaningful learning of physics  

Microsoft Academic Search

Schematic modeling is presented as an epistemologic al framework for physics instruction. According to schematic modeling, models comprise the content core of scientific knowledge, and modeling is a major process for constructing and employing this knowledge. A model is defined by its composition and structure, and situated in a theory by its domain and organization. Modeling involves model selection, construction,

Ibrahim Halloun

1996-01-01

22

Schematic driven layout of Reed Solomon encoders  

NASA Technical Reports Server (NTRS)

Two Reed Solomon error correcting encoders are presented. Schematic driven layout tools were used to create the encoder layouts. Special consideration had to be given to the architecture and logic to provide scalability of the encoder designs. Knowledge gained from these projects was used to create a more flexible schematic driven layout system.

Arave, Kari; Canaris, John; Miles, Lowell; Whitaker, Sterling

1992-01-01

23

Schematic modeling for meaningful learning of physics  

NSDL National Science Digital Library

Schematic modeling is presented as an epistemologic framework for physics instruction. According to schematic modeling, models comprise the content core of scientific knowledge, and modeling is a major process for constructing and employing this knowledge. A model is defined by its composition and structure and is situated in a theory by its domain and organization. Modeling involves model selection, construction, validation, analysis, and deployment. Two groups of Lebanese high school and college students participated in problem-solving tutorials that followed a schematic modeling approach. Both groups improved significantly in problem-solving performance, and course achievement of students in the college group was significantly better than that of their control peers.

Halloun, Ibrahim

2005-11-23

24

Phase diagram of multiply connected superconductors: A thin-wire loop and a thin film with a circular hole  

Microsoft Academic Search

The phase diagram of a thin superconducting film with a circular hole in axial magnetic field is presented. The result is obtained by solving numerically the nonlinear Ginzburg-Landau (GL) equation in the limit of a thin film with large kappaeff=lambdaeff\\/xi (where lambdaeff=lambda2\\/d is the effective screening length for a film of thickness d). First-order phase transitions between localized (around the

A. Bezryadin; A. Buzdin; B. Pannetier

1995-01-01

25

Schematic model of nuclear spin excitations  

SciTech Connect

A simple model to estimate the strength of spin and nonspin collective states is presented. The model was inspired by early schematic models based on energy-weighted sum rules and is a useful tool for interpreting experimental data without the complexities of realistic microscopic calculations. The strength of collective states is calculated by assuming that a single collective state completely exhausts the energy-weighted sum rule. 19 refs.

Boucher, P.M.

1990-01-01

26

Platform-independent method for computer aided schematic drawings  

DOEpatents

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.

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

2012-02-14

27

Using Functional Flow Diagrams to Enhance Technical Systems Understanding.  

ERIC Educational Resources Information Center

A treatment group of 20 aviation students used training manuals that presented functional flow diagrams before schematic diagrams. Comparison of data from 10 controls on a card-sort task showed that functional flow diagrams enhanced understanding of technical systems. (SK)

Satchwell, Richard E.

1997-01-01

28

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

29

Schematic concepts for schematic models of the real world: The Newtonian concept of force  

NSDL National Science Digital Library

High school and college students often carry out of traditional physics courses loose bundles of vague and undifferentiated concepts about physical objects and their properties. Within the framework of schematic modeling, a scientific concept can be defined explicitly with five schematic dimensions: domain, organization, quantification, expression, and employment. Based on the level of commensurability between scientific concepts and individual students' own concepts, students' cognitive evolution into the scientific realm can take different directions ranging from reinforcing existing concepts to constructing novel ones on completely new foundations. Such evolution is promoted in a student-centered, model-based instruction. The newtonian concept of force is discussed for illustration, along with the results of tutoring two groups of Lebanese students to develop this concept in a schematic modeling approach.

Halloun, Ibrahim

2005-11-23

30

Browsing schematics: Query-filtered graphs with context nodes  

NASA Technical Reports Server (NTRS)

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.

Ciccarelli, Eugene C.; Nardi, Bonnie A.

1988-01-01

31

ISS EPS Orbital Replacement Unit Block Diagrams  

NASA Technical Reports Server (NTRS)

The attached documents are being provided to Switching Power Magazine for information purposes. This magazine is writing a feature article on the International Space Station Electrical Power System, focusing on the switching power processors. These units include the DC-DC Converter Unit (DDCU), the Bi-directional Charge/Discharge Unit (BCDU), and the Sequential Shunt Unit (SSU). These diagrams are high-level schematics/block diagrams depicting the overall functionality of each unit.

Schmitz, Gregory V.

2001-01-01

32

Dilepton production in schematic causal viscous hydrodynamics  

SciTech Connect

Assuming that in the hot dense matter produced in relativistic heavy-ion collisions, the energy density, entropy density, and pressure as well as the azimuthal and space-time rapidity components of the shear tensor are uniform in the direction transversal to the reaction plane, we derive a set of schematic equations from the Isreal-Stewart causal viscous hydrodynamics. These equations are then used to describe the evolution dynamics of relativistic heavy-ion collisions by taking the shear viscosity to entropy density ratio of 1/4{pi} for the initial quark-gluon plasma (QGP) phase and of 10 times this value for the later hadron-gas (HG) phase. Using the production rate evaluated with particle distributions that take into account the viscous effect, we study dilepton production in central heavy-ion collisions. Compared with results from the ideal hydrodynamics, we find that although the dilepton invariant mass spectra from the two approaches are similar, the transverse momentum spectra are significantly enhanced at high transverse momenta by the viscous effect. We also study the transverse momentum dependence of dileptons produced from QGP for a fixed transverse mass, which is essentially absent in the ideal hydrodynamics, and find that this so-called transverse mass scaling is violated in the viscous hydrodynamics, particularly at high transverse momenta.

Song, Taesoo [Cyclotron Institute, Texas A and M University, College Station, Texas 77843-3366 (United States); Han, Kyong Chol; Ko, Che Ming [Cyclotron Institute and Department of Physics and Astronomy, Texas A and M University, College Station, Texas 77843-3366 (United States)

2011-02-15

33

Dilepton production in schematic causal viscous hydrodynamics  

NASA Astrophysics Data System (ADS)

Assuming that in the hot dense matter produced in relativistic heavy-ion collisions, the energy density, entropy density, and pressure as well as the azimuthal and space-time rapidity components of the shear tensor are uniform in the direction transversal to the reaction plane, we derive a set of schematic equations from the Isreal-Stewart causal viscous hydrodynamics. These equations are then used to describe the evolution dynamics of relativistic heavy-ion collisions by taking the shear viscosity to entropy density ratio of 1/4? for the initial quark-gluon plasma (QGP) phase and of 10 times this value for the later hadron-gas (HG) phase. Using the production rate evaluated with particle distributions that take into account the viscous effect, we study dilepton production in central heavy-ion collisions. Compared with results from the ideal hydrodynamics, we find that although the dilepton invariant mass spectra from the two approaches are similar, the transverse momentum spectra are significantly enhanced at high transverse momenta by the viscous effect. We also study the transverse momentum dependence of dileptons produced from QGP for a fixed transverse mass, which is essentially absent in the ideal hydrodynamics, and find that this so-called transverse mass scaling is violated in the viscous hydrodynamics, particularly at high transverse momenta.

Song, Taesoo; Han, Kyong Chol; Ko, Che Ming

2011-02-01

34

Stereo Diagrams  

NSDL National Science Digital Library

This exercise is an introduction to stereo diagrams. Students draw stereo diagrams for various models, determine the point group and crystal system of certain crystal shapes, and determine which block models match given stereo diagrams.

Perkins, Dexter

35

Development and application of a rubric for analysis of novice students' laboratory flow diagrams  

Microsoft Academic Search

The purpose of this study was to develop and apply a scheme for the analysis of flow diagrams. The flow diagrams in question are a schematic representation of written instructions that require students to process the text of their practical manual. It was hoped that an analysis of the flow diagrams would provide insight into students' understanding of the manual.

Bette Davidowitz; Marissa Rollnick; Cynthia Fakudze

2005-01-01

36

Development and Application of a Rubric for Analysis of Novice Students' Laboratory Flow Diagrams  

ERIC Educational Resources Information Center

The purpose of this study was to develop and apply a scheme for the analysis of flow diagrams. The flow diagrams in question are a schematic representation of written instructions that require students to process the text of their practical manual. It was hoped that an analysis of the flow diagrams would provide insight into students'…

Davidowitz, Bette; Rollnick, Marissa; Fakudze, Cynthia

2005-01-01

37

Application note : using open source schematic capture tools with Xyce.  

SciTech Connect

The development of the XyceTM Parallel Electronic Simulator has focused entirely on the creation of a fast, scalable simulation tool, and has not included any schematic capture or data visualization tools. This application note will describe how to use the open source schematic capture tool gschem and its associated netlist creation tool gnetlist to create basic circuit designs for Xyce, and how to access advanced features of Xyce that are not directly supported by either gschem or gnetlist.

Russo, Thomas V.

2013-08-01

38

Venn Diagrams  

NSDL National Science Digital Library

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.

2010-01-01

39

Lucidchart: Diagramming  

NSDL National Science Digital Library

For all those who have wrestled with creating charts and diagrams in word processors, the Google Chrome application Lucidchart may be a long-awaited answer. Users can start using the intuitive drag-and-drop interface right away, although a free signup is required to save diagrams. By sharing a link with coworkers, project collaborators can work on the same diagram at the same time. This application is compatible with all computers running Google Chrome.

2012-08-24

40

Carroll Diagrams  

NSDL National Science Digital Library

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".

Team, Nrich

2012-01-01

41

The Schematic Structure of Computer Science Research Articles  

Microsoft Academic Search

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.

Santiago Posteguillo

1999-01-01

42

10. Photograph of a line drawing. 'PROCESS FLOW SCHEMATIC, GAS ...  

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

10. Photograph of a line drawing. 'PROCESS FLOW SCHEMATIC, GAS PRODUCER PROCESS, BUILDING 10A.' Holston Army Ammunition Plant, Holston Defense Corporation. August 29, 1974. Delineator: G. A. Horne. Drawing # SK-1942. - Holston Army Ammunition Plant, Producer Gas Plant, Kingsport, Sullivan County, TN

43

Modeling biomass competition and invasion in a schematic wetland  

Microsoft Academic Search

Plants growing along hydrologic gradients adjust their biomass allocation and distribution in response to interspecific competition. Furthermore, susceptibility of a community to invasion is to some extent mediated by differences in growth habit, including root architecture and canopy hight. With reference to the study of a schematic wetland, the aim of this paper is (1) to test, via numerical modeling,

N. Ursino

2010-01-01

44

Health-Promoting School Indicators: Schematic Models from Students  

ERIC Educational Resources Information Center

Purpose: The purpose of this paper is to outline a three-stage process for engaging with students to develop school level indicators of health in sequential class groups students first generated, then categorised indicators and finally developed schematic representations of their analyses. There is a political and practical need to develop…

Gabhainn, Saoirse Nic; Sixsmith, Jane; Delaney, Ellen-Nora; Moore, Miriam; Inchley, Jo; O'Higgins, Siobhan

2007-01-01

45

Venn Diagrams  

NSDL National Science Digital Library

This interactive problem provides an opportunity for children to become familiar with Venn diagrams, while reinforcing knowledge of number properties. Students must place the numbers from 1 to 40 into a Venn diagram of two sets with an intersection. The Teachers' Notes page offers rationale, suggestions for implementation, discussion questions, ideas for extension and support.

2007-09-01

46

Digital wires  

Microsoft Academic Search

We study hardware implementations of cellular automata as reliable, adjustable, and secure commication lines. We discuss energy efficient digital wires on a nano-scale, all-optical digital wires, and digital wires as power lines and present performance data of a prototype digital wire, a six cells wide and ten cells long Boolean network. We show that digital wires have the following advantages:

Alfred Hübler

2009-01-01

47

Hovmoller Diagrams  

NSDL National Science Digital Library

Hovmoller diagrams are great for displaying large amounts of data in a meaningful and understandable form. The image on the left graphical shows the El Nino signal in the equatorial Pacific (100 W to 140 E ...

48

Wire Maze  

NSDL National Science Digital Library

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.

K-12 Outreach Office,

49

CDRP - TeleSynergy(R) - Wiring Diagrams  

Cancer.gov

Home About CDRP Background The Challenge Ahead Health Disparities Cooperative Planning Grant Objective and Scope U56 Award Mechanism Target Populations Funded Institutions Funded Institutions Programs' Presentations CDRP Symposium Presentations Clinical

50

Venn diagrams  

NSDL National Science Digital Library

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.

National Science Digital Library (NSDL) Middle School Portal Staff

2008-03-10

51

Educational Diagrams.  

ERIC Educational Resources Information Center

According to Peirce, diagrammatic constructions are represented by words in a sentence, an algebraic formula, or a graphic display. They are the basis of all valid reasoning and provide significant means for discovering unexpected truths. Sources and uses of diagrams in education are discussed in relation to Peirce's ideas. Nineteen references are…

Moxley, Roy

1983-01-01

52

Mechanical verification of a schematic Byzantine clock synchronization algorithm  

NASA Technical Reports Server (NTRS)

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.

Shankar, Natarajan

1991-01-01

53

Digital Wires  

NASA Astrophysics Data System (ADS)

We study hardware implementations of cellular automata as reliable, adjustable, and secure commication lines. We discuss energy efficient digital wires on a nano-scale, all-optical digital wires, and digital wires as power lines and present performance data of a prototype digital wire, a six cells wide and ten cells long Boolean network. We show that digital wires have the following advantages: (i) Fixed pulse shape (pulses have a rectangular shape with a constant height and a constant width and produce no echos); (ii) Robust against electric smog. Digital wires based on semiconductor technology are effectively inert against electro-magnetic radiation, except for low-frequency radiation (heat) and high frequency radiation (X-rays). Digital wires based on plasma technology have in addition a very high tolerance for heat and X-rays. In digital wire the pulse speed can be rapidly adjusted. Signals on digital wires can be encrypted. Some digital wires can be used as general purpose computers. The data and the code are the input of the wire. Then both travel along the wire and `collide'. The collision is the computation. The result travels to the end of the wire, for further processing, as parallel input by a CPU, an actuator, or another digital wire.

Brown, Benny; Hubler, Alfred

2009-03-01

54

Wire Maze  

NSDL National Science Digital Library

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.

Institute, Worcester P.

2005-01-01

55

Venn Diagrams  

NSDL National Science Digital Library

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.

Jiminez, Alfredo

56

Venn Diagrams  

NSDL National Science Digital Library

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.

Jiminez, Alfredo

2007-09-13

57

When reasoning modifies memory: Schematic assimilation triggered by analogical mapping.  

PubMed

Analogical mapping highlights shared relations that link 2 situations, potentially at the expense of information that does not fit the dominant pattern of correspondences. To investigate whether analogical mapping can alter subsequent recognition memory for features of a source analog, we performed 2 experiments with 4-term proportional analogies (A:B::C:D), using problems based on cartoon figures varying on 4 visual dimensions. The source analog (A:B) was encoded before the reasoner was told which dimension was relevant to the analogy. After encoding, the A:B pair disappeared, 1 randomly selected dimension was specified as the basis for an analogical decision, and the target (C:D) was presented. A decision about the validity of the analogy was then made, after which memory for the A:B pair was assessed by a recognition test. In Experiment 1, we found that participants' recognition memory was reduced for lures involving a feature change on a dimension initially inconsistent with the analogical decision relative to a change on a dimension that had been consistent with it. The results of Experiment 2 revealed that this memory decrement occurred only when the change in the initially inconsistent feature caused the lure to be coherent with the overall schematic pattern of relational correspondences. These findings suggest that analogical reasoning can trigger changes in the memory representation of a source analog stored in memory such that subsequent recognition is guided by a relational schema. (PsycINFO Database Record (c) 2014 APA, all rights reserved). PMID:24707788

Vendetti, Michael S; Wu, Aaron; Rowshanshad, Ebi; Knowlton, Barbara J; Holyoak, Keith J

2014-07-01

58

Technological Literacy Learning with Cumulative and Stepwise Integration of Equations into Electrical Circuit Diagrams  

ERIC Educational Resources Information Center

Technological literacy education involves the teaching of basic engineering principles and problem solving, including elementary electrical circuit analysis, to non-engineering students. Learning materials on circuit analysis typically rely on equations and schematic diagrams, which are often unfamiliar to non-engineering students. The goal of…

Ozogul, G.; Johnson, A. M.; Moreno, R.; Reisslein, M.

2012-01-01

59

Plated wire memory subsystem  

NASA Technical Reports Server (NTRS)

The design, construction, and test history of a 4096 word by 18 bit random access NDRO Plated Wire Memory for use in conjunction with a spacecraft input/output and central processing unit is reported. A technical and functional description is given along with diagrams illustrating layout and systems operation. Test data is shown on the procedures and results of system level and memory stack testing, and hybrid circuit screening. A comparison of the most significant physical and performance characteristics of the memory unit versus the specified requirements is also included.

Carpenter, K. H.

1974-01-01

60

Residential Wiring.  

ERIC Educational Resources Information Center

The second in a series of three curriculum packages on wiring, these materials for a five-unit course were developed to prepare postsecondary students for entry-level employment in the residential wiring trade. The five units are: (1) blueprint reading and load calculations; (2) rough-in; (3) service; (4) trim out and troubleshooting; and (5) load…

Taylor, Mark

61

16 CFR Figure 4 to Subpart A of... - Flooring Radiant Panel Tester Schematic Low Flux End, Elevation  

Code of Federal Regulations, 2010 CFR

...2010-01-01 false Flooring Radiant Panel Tester Schematic Low Flux End, Elevation 4 Figure 4 to Subpart A of Part 1209 Commercial...A of Part 1209âFlooring Radiant Panel Tester Schematic Low Flux End, Elevation...

2010-01-01

62

16 CFR Figure 4 to Subpart A of... - Flooring Radiant Panel Tester Schematic Low Flux End, Elevation  

Code of Federal Regulations, 2010 CFR

...2009-01-01 false Flooring Radiant Panel Tester Schematic Low Flux End, Elevation 4 Figure 4 to Subpart A of Part 1209 Commercial...A of Part 1209âFlooring Radiant Panel Tester Schematic Low Flux End, Elevation...

2009-01-01

63

Wire Wise.  

ERIC Educational Resources Information Center

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)

Swanquist, Barry

1998-01-01

64

LeView: automatic and interactive generation of 2D diagrams for biomacromolecule/ligand interactions  

PubMed Central

2D diagrams are widely used in the scientific literature to represent interactions between ligands and biomacromolecules. Such schematic diagrams are very helpful to better understand the chemical interactions and biological processes in which ligands are involved. Here, a new tool for automatic and interactive generation of 2D diagrams for biomacromolecule/ligand interactions is presented. LeView (Ligand-Environment Viewer) produces customised and high-quality figures, with a good compromise between a faithful representation of the 3D data (structures and interactions) and aesthetic criteria. LeView can be freely downloaded at http://www.pegase-biosciences.com/tools/leview/.

2013-01-01

65

University Wire  

NSDL National Science Digital Library

University Wire is a daily Internet news service for college newspapers. Included are a story of the day, a large list of pointers to Internet resources in topics such as current headlines, politics, medicine and health, and women's resources; a "Kopyedit Korner," with pointers to writing reference materials; a placement center with job openings lists for college journalists; a large selection of pointers to college newspapers; and pointers to general circulation newspapers. Pointers to student and professional journalism organizations, as well as a calendar of journalism related events, are also provided. University Wire is a service of The Main Quad.

1997-01-01

66

Space Station Freedom secondary power wiring requirements  

NASA Technical Reports Server (NTRS)

Secondary power is produced by DDCU's (direct current to direct current converter units) and routed to and through secondary power distribution assemblies (SPDA's) to loads or tertiary distribution assemblies. This presentation outlines requirements of Space Station Freedom (SSF) EEE (electrical, electronic, and electromechanical) parts wire and the approved electrical wire and cable. The SSF PDRD (Program Definition and Requirements Document) language problems and resolution are reviewed. The cable routing to and from the SPDA's is presented as diagrams and the wire recommendations and characteristics are given.

Sawyer, C. R.

1994-01-01

67

Hertzsprung-Russell Diagram  

NSDL National Science Digital Library

This is a lecture that introduces the HR diagram. The HR diagram is a plot of luminosity in solar units on the Y axis and stellar temperature on the X axis. The HR diagram is a key tool in tracing the evolution of stars. The lecture discusses the location of different stars on the diagram. It also includes a discussion of thermonuclear fusion and the neutrino problem. A quiz follows the lecture.

Schombert, Jim

2008-12-15

68

Generalized Block Diagrams  

Microsoft Academic Search

The conventions and rules for generalized block diagram representation are developed and the relationships between generalized block diagrams and network graphs discussed. The generalized block diagram as developed here should prove of value in the computer-aided study of complex systems.

A. G. J. MACFARLANE

1967-01-01

69

Phase Equilibria Diagrams Database  

National Institute of Standards and Technology Data Gateway

SRD 31 NIST/ACerS Phase Equilibria Diagrams Database (PC database for purchase)   The Phase Equilibria Diagrams Database contains commentaries and more than 21,000 diagrams for non-organic systems, including those published in all 21 hard-copy volumes produced as part of the ACerS-NIST Phase Equilibria Diagrams Program (formerly titled Phase Diagrams for Ceramists): Volumes I through XIV (blue books); Annuals 91, 92, 93; High Tc Superconductors I & II; Zirconium & Zirconia Systems; and Electronic Ceramics I. Materials covered include oxides as well as non-oxide systems such as chalcogenides and pnictides, phosphates, salt systems, and mixed systems of these classes.

70

Crossover behavior and multistep relaxation in a schematic model of the cut-off glass transition  

Microsoft Academic Search

We study a schematic mode-coupling model in which the ideal glass transition is cut off by a decay of the quadratic coupling constant in the memory function. (Such a decay, on a time scale tauI , has been suggested as the likely consequence of activated processes.) If this decay is complete, so that only a linear coupling remains at late

M. J. Greenall; M. E. Cates

2007-01-01

71

Spider phobics more easily see a spider in morphed schematic pictures  

Microsoft Academic Search

BACKGROUND: Individuals with social phobia are more likely to misinterpret ambiguous social situations as more threatening, i.e. they show an interpretive bias. This study investigated whether such a bias also exists in specific phobia. METHODS: Individuals with spider phobia or social phobia, spider aficionados and non-phobic controls saw morphed stimuli that gradually transformed from a schematic picture of a flower

Iris-Tatjana Kolassa; Arlette Buchmann; Romy Lauche; Stephan Kolassa; Ivailo Partchev; Wolfgang HR Miltner; Frauke Musial

2007-01-01

72

An owl's eye: Schematic optics and visual performance in Strix aluco L  

Microsoft Academic Search

The schematic eye ofStrix aluco, a nocturnal owl species, is described. A comparative and ecological context is used to examine the relationships between optical parameters of the eye and its light gathering and resolving powers. It is concluded that the essentially ‘nocturnal’ feature of the owl eye does not lie in either its light gathering power or the sensitivity of

Graham R. Martin

1982-01-01

73

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

ERIC Educational Resources Information Center

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)

Sutton, Imre

2002-01-01

74

Intruder States in the Cadmium Isotopes and a Simple Schematic Calculation.  

National Technical Information Service (NTIS)

Angular correlation studies of sup 118 sup 120 Cd at TRISTAN have allowed the discovery and identification in each nucleus of two new 0 exp + states and their respective E2 decay properties. The results have been interpreted in terms of a simple schematic...

A. Aprahamian D. S. Brenner R. F. Casten K. Heyde

1984-01-01

75

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

ERIC Educational Resources Information Center

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…

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

2011-01-01

76

Infants' Perception of Natural and Distorted Arrangements of a Schematic Face.  

ERIC Educational Resources Information Center

One- and two-month-old infants were shown schematic drawings of a human face with features arranged (1) naturally, (2) symmetrically but scrambled, and (3) asymmetrically and scrambled. Two-month-olds discriminated among all arangements and preferred the natural arrangement; one-month-olds showed no discrimination or preference. (Author/DB)

Maurer, Daphne; Barrera, Maria

1981-01-01

77

Recognition of Schematic Facial Displays of Emotion in Parents of Children with Autism  

ERIC Educational Resources Information Center

Performance on an emotional labeling task in response to schematic facial patterns representing five basic emotions without the concurrent presentation of a verbal category was investigated in 40 parents of children with autism and 40 matched controls. "Autism fathers" performed worse than "autism mothers," who performed worse than controls in…

Palermo, Mark T.; Pasqualetti, Patrizio; Barbati, Giulia; Intelligente, Fabio; Rossini, Paolo Maria

2006-01-01

78

Memory for Schematic and Categorical Information: A Replication and Extension of Rabinowitz and Mandler (1983)  

Microsoft Academic Search

Rabinowitz and Mandler (1983) found that information organized schematically is better recalled than the same information organized categorically. This was taken as evidence that interitem connections are richer in a schema than in a category. The present experiment replicated this finding and revealed a confound in Rabinowitz and Mandler’s studies. Specifically, their schema list was easier to remember than their

Mustaq Khan; Allan Paivio

1988-01-01

79

SUPPORT SYSTEM FOR IMPROVEMENT AND PREDICTION OF THE ENERGY PERFORMANCE OF AN APARTMENT ENVELOPE IN SCHEMATIC DESIGN  

Microsoft Academic Search

Establishing the appropriate measure for estimating and improving the energy performance of a new building is very important at Schematic Design. As an initial attempt toward this end, this research sought to determine at Schematic Design if the designed apartment envelop structure ensured proper energy conservation performance and to develop a support system that could suggest for the envelop structure

Yu Young-Dong; Woo Sae-Jin; Suh Hye-Soo

80

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

Microsoft Academic Search

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

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

1982-01-01

81

Revise Through Diagrams: Physics  

Microsoft Academic Search

This is a 72 page book organized in seven major sections covering the present GCSE physics syllabuses and the physics component of the present GCSE double-award science syllabuses. Each page consists of several boxed features covering the key aspects of a single topic within each section. Each feature box contains one or more diagrams and related text. The diagrams are

Jim Breithaupt

1997-01-01

82

Compact explosion diagrams  

Microsoft Academic Search

This paper presents a system to automatically generate compact explosion diagrams. Inspired by handmade illustrations, our approach reduces the complexity of an explosion diagram by rendering an exploded view only for a subset of the assemblies of an object. However, the exploded views are chosen so that they allow inference of the remaining unexploded assemblies of the entire 3D model.

Markus Tatzgern; Denis Kalkofen; Dieter Schmalstieg

2010-01-01

83

Diagrams in the Mind?  

Microsoft Academic Search

Clearly we can solve problems by thinking about them. Sometimes we have the impression that in doing so we use words, at other times diagrams or images. Often we use both. What is going on when we use mental diagrams or images? This question is addressed in relation to the more general multi-pronged question: what are representations, what are they

Aaron Sloman

84

Mollier Diagram for Nitrogen.  

National Technical Information Service (NTIS)

Thermodynamic data for nitrogen are presented in Mollier diagram form covering the temperature range of 30K to 15,000K and the density range of 0.0000001 to 1000 amagat. Data for the solid and liquid regions are included. The diagram contains all availabl...

C. H. Piper R. L. Humphrey

1967-01-01

85

Hertzsprung-Russell Diagram  

NSDL National Science Digital Library

This activity teaches students about the Hertzsprung-Russell diagram. The students will first describe differences between near and bright stars. Then they will discern a relationship between temperature and brightness. Finally they will correlate the evolution of stars to plotting the H-R diagram.

Slater, Tim P.

2004-07-16

86

Wiring optimization can relate neuronal structure and function  

PubMed Central

We pursue the hypothesis that neuronal placement in animals minimizes wiring costs for given functional constraints, as specified by synaptic connectivity. Using a newly compiled version of the Caenorhabditis elegans wiring diagram, we solve for the optimal layout of 279 nonpharyngeal neurons. In the optimal layout, most neurons are located close to their actual positions, suggesting that wiring minimization is an important factor. Yet some neurons exhibit strong deviations from “optimal” position. We propose that biological factors relating to axonal guidance and command neuron functions contribute to these deviations. We capture these factors by proposing a modified wiring cost function.

Chen, Beth L.; Hall, David H.; Chklovskii, Dmitri B.

2006-01-01

87

Places Wire  

NSDL National Science Digital Library

Are you curious to learn more about cities? You'd do well to make a beeline for the Places Wire site, which offers a cornucopia of material on urban parks, public policy, architecture, planning, and other topics. In sum total, the site is a "curated feed of news and commentary on architecture, landscape and urbanism." The site has partnered with 20 different organizations to provide new content on a daily basis. Some of the recent articles that have found their way to the site include "9 Suggestions for Changing DC's Height Limit" and "The Demise of the Public Hearing." Visitors can also use the drop-down View tab to scroll through the last few hours or days, as the content is quite dynamic. One gem that should not be missed is the archived appearance of Frank Lloyd Wright as a guest on the 1950s television program "What's My Line?"

88

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

NASA Technical Reports Server (NTRS)

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.

Campbell, Colin

2012-01-01

89

Wire Chamber Aging and Wire Material  

Microsoft Academic Search

Recent studies on wire chamber aging has shown surprising results indicating that anode wire material may have a strong influence on the useful life-time of a chamber or counter. The aging process discussed here is related to changes in the surface characteristics of the anode wires. Those changes may be due to an oxidation process involving molecules produced from the

Muzaffer Atac

1987-01-01

90

Crossover behavior and multistep relaxation in a schematic model of the cut-off glass transition  

Microsoft Academic Search

We study a schematic mode-coupling model in which the ideal glass transition\\u000ais cut off by a decay of the quadratic coupling constant in the memory\\u000afunction. (Such a decay, on a time scale tau_I, has been suggested as the\\u000alikely consequence of activated processes.) If this decay is complete, so that\\u000aonly a linear coupling remains at late times,

M. J. Greenall; M. E. Cates

2007-01-01

91

The Ideal Self: Schematic Processing of Perfectionistic Content in Dysphoric University Students  

Microsoft Academic Search

This study assessed ideal-self-schematic processing, recall of perfectionistic content rated as not descriptive of the actual self or ideal self, and content-specific processing as a function of dysphoria. College students (n = 219) made structural (ST), ideal-self (IS), and actual-self (AS) ratings on perfectionistic, negative, and neutral words, and completed an incidental recall task. Words rated with the IS task

Paul L. Hewitt; Myles Genest

1990-01-01

92

Ratings of gender appropriateness of sports participation: Effects of gender-based schematic processing  

Microsoft Academic Search

The domain of sports and physical activity has traditionally been considered to be appropriate for men and not compatible with the feminine role. Because gender-based schematic processing has been shown to affect attitudes and behavior, there might be differences in the categorization of sports as masculine or feminine, between sex-typed and non-sex-typed individuals. The findings in this study, including 104

Nathalie Koivula

1995-01-01

93

Bibliographic Notes on Voronoi Diagrams.  

National Technical Information Service (NTIS)

The paper presents a comprehensive annotated bibliography on various theoretical and algorithmic aspects of Voronoi diagrams and related diagrams. Bibliographic notes on the relationship between Voronoi diagrams and solutions to the Euclidean traveling sa...

J. Bernal

1993-01-01

94

Satellite Venn Diagram  

NSDL National Science Digital Library

In this activity, students will use the background information they have read to organize a list of sources and objects, putting each item given in the appropriate part of the Venn diagram, depending on which instrument will study that item. Students will demonstrate their understanding of spectra, astronomical observations, and have read the background material on Chandra, Astro-E and the microcalorimeter, and the Constellation X-ray Observatory. They will write a five minute summary of the capabilities of the three observatories, based on their Venn diagram. Students' understanding of the background material will be evaluated based on the accuracy of their Venn diagrams and the interpretation of the information on the Venn diagrams from their closure paper.

2007-03-24

95

Diagram of Computer Keyboard  

NSDL National Science Digital Library

This is a line drawing of a Windows PC keyboard complete with labels for each key. This diagram is used on tests where students are asked to circle the keys that would be used to perform various functions.

Ward, Charles

2011-01-21

96

Network Legos: Building Blocks of Cellular Wiring Diagrams  

Microsoft Academic Search

Publicly-available data sets provide detailed and large-scale information on multiple types of molecular interaction networks in a number of model organisms. These multi-modal universal networks cap- ture a static view of cellular state. An important challenge in systems biology is obtaining a dynamic perspective on these networks by inte- grating them with gene expression measurements taken under multiple conditions. We

T. M. Murali; Corban G. Rivera

2007-01-01

97

Servo Motor Diagramming and Wiring Lab (Instructor Guide)  

NSDL National Science Digital Library

This lab activity was completed as part of an NSF-funded externship program administered by the High Tech Workforce Initiative at Maricopa Community Colleges. Students will apply their knowledge of electrical power, servo control systems and servo motor properties to real-world scenarios. This lab is part of a servo systems course in an Industrial Operations Technology AAS program, using Amatrol curriculum and equipment. It can be done in conjunction with, or as an adaptation or replacement of, Lab Experiments 4-2 and 4-3 in the Amatrol Electro Servo Learning System materials.

Perry, Clyde

2012-12-25

98

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.

99

Venn Diagram Shape Sorter  

NSDL National Science Digital Library

This interactive Java applet helps students explore attributes of objects by sorting different sized, colored, shapes into Venn Diagrams. The user chooses the type of Venn Diagram including 2 intersecting circles, 2 non-intersecting circles, or a single circle. Two modes include "make the rule," where users create the rules of the circles and then sort, or "guess the rule," where users attempt to sort the shapes into the circles in order to guess the rule the computer has chosen.

2005-01-01

100

Temporal Verification Diagrams  

Microsoft Academic Search

. Most formal approaches to the verification of temporal propertiesof reactive programs infer temporal conclusions from verificationconditions that are state formulas, i.e., contain no temporal operators.These proofs can often be effectively presented by the use of verification diagrams. In this paper, we present a self-contained presentation ofverification diagrams for proving various temporal properties.Beginning with safety properties, we present WAIT-FOR and

Zohar Manna; Amir Pnueli

1994-01-01

101

Ternary diagram plots  

SciTech Connect

A ternary diagram uses an equilateral triangle to graphically depict the relationship among three data values which sum to a constant value. Geologists in many fields use ternary diagrams for a variety of purposes: identification and classification of sedimentary, igneous, and metamorphic rocks; classification of soils; chemical and molecular representation of minerals; representation of the fractional crystallization of igneous rock-forming minerals. Traditionally, constructing a ternary diagram involves calculating the normalized values from the raw data for the three components to be plotted, then plotting the point that represents these values on an equilateral triangle. This can be a tedious and time-consuming process, especially if many samples must be plotted, or many combinations of components represented. Ternary is a program that allows manipulation of large amounts of data to create accurate ternary diagrams. The program allows input of data for hundreds of samples, each containing up to 20 components, any three of which can be combined to form a ternary diagram. Each component can be given a label up to five characters long for ease in identification. Data are entered in raw form (i.e. parts per million, percentages, real or whole numbers), normalized internally to 100, and plotted on a ternary diagram that can be printed to the screen or dot matrix printer.

Scott, A.J.; Guth, P.L.

1987-11-01

102

Optimal wiring between rectangles  

Microsoft Academic Search

We consider the problem of wiring together two parallel rows of points under a variety of conditions. The options include whether we allow the rows to slide relative to one another, whether we use only rectilinear wires or arbitrary wires, and whether we can use wires in one layer or several layers. In almost all of these combinations of conditions,

Danny Dolev; Kevin Karplus; Alan Siegel; Alex Strong; Jeffrey D. Ullman

1981-01-01

103

Decision-Making Through Performance Simulation and Code Compliance from the Early, Schematic Phases of Building Design.  

National Technical Information Service (NTIS)

This paper is about the merging of two software applications that allows building decision makers to consider code compliance and to use performance simulation tools from the early, schematic phases of building design. By making the capabilities of a code...

G. Reichard K. Papamichael

2005-01-01

104

Textured powder wires  

US Patent & Trademark Office Database

A method for fabricating a wire from textured powder includes compressing a powder comprising a plurality of particles into a ribbon. The method further includes encasing the ribbon between two foil sheets to create a sheet of encased ribbon. The method additionally includes rolling the encased ribbon into a substantially cylindrical undrawn wire. The method further includes drawing the undrawn wire to create a substantially cylindrical wire having a diameter less than a diameter of the substantially cylindrical undrawn wire.

2013-11-26

105

Upgrading Diagnostic Diagrams  

NASA Astrophysics Data System (ADS)

Diagnostic diagrams of forbidden lines have been a useful tool for observers in astrophysics for many decades now. They are used to obtain information on the basic physical properties of thin gaseous nebulae. Moreover they are also the initial tool to derive thermodynamic properties of the plasma from observations to get ionization correction factors and thus to obtain proper abundances of the nebulae. Some diagnostic diagrams are in wavelengths domains which were difficult to take either due to missing wavelength coverage or low resolution of older spectrographs. Thus they were hardly used in the past. An upgrade of this useful tool is necessary because most of the diagrams were calculated using only the species involved as a single atom gas, although several are affected by well-known fluorescence mechanisms as well. Additionally the atomic data have improved up to the present time. The new diagnostic diagrams are calculated by using large grids of parameter space in the photoionization code CLOUDY. For a given basic parameter the input radiation field is varied to find the solutions with cooling-heating-equilibrium. Empirical numerical functions are fitted to provide formulas usable in e.g. data reduction pipelines. The resulting diagrams differ significantly from those used up to now and will improve the thermodynamic calculations.

Proxauf, B.; Kimeswenger, S.; Öttl, S.

2014-04-01

106

Decomposition of Data Flow Diagrams  

Microsoft Academic Search

Data flow diagrams are an important design aid in system development. CASE tools allow data flow diagram construction and modification to be automated. Decomposition is the top-down development of a data flow diagram starting with the system inputs and the system outputs. Decomposition may also be automated, resulting in an interactive process for data flow diagram design. Adler (1988) described

Timothy Arndt; Angela Guercio

1992-01-01

107

Crossover behavior and multistep relaxation in a schematic model of the cut-off glass transition.  

PubMed

We study a schematic mode-coupling model in which the ideal glass transition is cut off by a decay of the quadratic coupling constant in the memory function. (Such a decay, on a time scale tau I , has been suggested as the likely consequence of activated processes.) If this decay is complete, so that only a linear coupling remains at late times, then the alpha relaxation shows a temporal crossover from a relaxation typical of the unmodified schematic model to a final strongly slower-than-exponential relaxation. This crossover, which differs somewhat in form from previous schematic models of the cutoff glass transition, resembles light-scattering experiments on colloidal systems, and can exhibit a "slower-than- alpha " relaxation feature hinted at there. We also consider what happens when a similar but incomplete decay occurs, so that a significant level of quadratic coupling remains for t>tau I . In this case the correlator acquires a third, weaker relaxation mode at intermediate times. This empirically resembles the beta process seen in many molecular glass formers. It disappears when the initial as well as the final quadratic coupling lies on the liquid side of the glass transition, but remains present even when the final coupling is only just inside the liquid (so that the alpha relaxation time is finite, but too long to measure). Our results are suggestive of how, in a cutoff glass, the underlying "ideal" glass transition predicted by mode-coupling theory can remain detectable through qualitative features in dynamics. PMID:17677069

Greenall, M J; Cates, M E

2007-05-01

108

The projection diagram  

NASA Astrophysics Data System (ADS)

We describe a diagram, named the projection diagram (PD), that can be used for the interpretation of fringe projection operations in a similar way as the Holodiagram is used in holography and other branches in optics. It is obtained as a Moiré pattern between two spoke targets that mimic central projections, the same as those in a projection and observation system or two projection systems. N. Abramson [Academic, London (1981)] has already proposed its use in systems with two observation points (i.e., stereoscopic observation). By using this PD, several interesting features dealing with fringe projection are highlighted. Information on the sensitivity vector and the geometry of the contouring surfaces can be straightforwardly obtained in a graphical way. The effect of defocusing can also be included in the diagram.

Muramatsu, Mikaya; Torroba, Patricia; Cap, Nelly; Rabal, Hector

2003-08-01

109

Minkowski Diagram Model  

NSDL National Science Digital Library

The Minkowski Diagram model displays the spacetime diagrams for two inertial observers. One or two events may be displayed and moved with the mouse. Optionally, the corresponding light cones may be shown, as well as the simultaneity lines in both reference frames. The spacetime interval is automatically computed. The simulation may be used to discuss simultaneity and causality in special relativity. You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting "Open Ejs Model" from the pop-up menu item. The Minkowski Diagram model was created using the Easy Java Simulations (Ejs) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_ehu_special_relativity_minkowski.jar file will run the program if Java is installed. Please note that this resource requires at least version 1.5 of Java (JRE).

Aguirregabiria, Juan

2011-09-09

110

Schematic baryon models, their tight binding description and their microwave realization  

NASA Astrophysics Data System (ADS)

A schematic model for baryon excitations is presented in terms of a symmetric Dirac gyroscope, a relativistic model solvable in closed form, that reduces to a rotor in the non-relativistic limit. The model is then mapped on a nearest neighbour tight binding model. In its simplest one-dimensional form this model yields a finite equidistant spectrum. This is experimentally implemented as a chain of dielectric resonators under conditions where their coupling is evanescent and a good agreement with the prediction is achieved.

Sadurní, E.; Franco-Villafañe, J. A.; Kuhl, U.; Mortessagne, F.; Seligman, T. H.

2013-12-01

111

Diblock copolymer phase diagram  

NSDL National Science Digital Library

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, Ï is the Flory-Huggins Chi Parameter, and N is the length of the block.

Iacovella, Christopher R.

2006-11-20

112

Wire Test Grip Fixture  

NASA Technical Reports Server (NTRS)

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.

Burke, Christopher S.

2011-01-01

113

Homoepitaxial growth of catalyst-free GaN wires on N-polar substrates  

NASA Astrophysics Data System (ADS)

The shape of c-oriented GaN nanostructures is found to be directly related to the crystal polarity. As evidenced by convergent beam electron diffraction applied to GaN nanostructures grown by metal-organic vapor phase epitaxy on c-sapphire substrates: wires grown on nitridated sapphire have the N-polarity ([0001]) whereas pyramidal crystals have Ga-polarity ([0001]). In the case of homoepitaxy, the GaN wires can be directly selected using N-polar GaN freestanding substrates and exhibit good optical properties. A schematic representation of the kinetic Wulff's plot points out the effect of surface polarity.

Chen, X. J.; Perillat-Merceroz, G.; Sam-Giao, D.; Durand, C.; Eymery, J.

2010-10-01

114

Controlled localized buckling responses of orthodontic arch wires.  

PubMed

The orthodontic arch wire is often activated locally, in transverse bending and/or longitudinal torsion, to engage an individual malaligned tooth. Arch wires with substantial flexibilities and elastic ranges in bending are available. Several clinical reports of distal displacements of molars with appliances activated by locally buckling the arch wire have appeared in the recent published literature. This article contains an explanation of buckling or "column" action and the postbuckling response of a wire, and a report of the results of a controlled, in-vitro study of a sample of 256 wire segments subjected to activation-deactivation, buckling-postbuckling-unbuckling cycles. Continuous force-displacement diagrams were obtained from mechanical tests run at oral temperature. Four orthodontics-relevant, mechanical characteristics were quantified from each diagram, and each specimen was subjected to posttest evaluation for inelastic behavior. Although the deformation of the buckled wire is, in fact, bending, the force-displacement diagrams obtained differed substantially from their familiar counterparts generated in transverse bending. Judging from the force magnitudes induced as the deactivation half-cycles commenced as well as the deactivation rates, not all of the 8 wires seem to be clinically suitable for activation initiated by buckling. Magnitudes of springback were substantial from activations as large as 6 mm, and only 2 of the 8 wires exhibited full deactivations less than 80% of their activating displacements. This relatively new mode of arch wire activation that enables delivery to the dentition of mesiodistal pushing forces has substantial potential for clinical application from several biomechanical standpoints. PMID:10474103

Nikolai, R J; Chung, A Y

1999-09-01

115

NOTES ON FEYNMAN DIAGRAMS  

Microsoft Academic Search

We introduce in a pedagogical manner how to compute probability amplitudes from Feynman diagrams, starting with 4 model. We introduce the notion of renormalization in this model at the one-loop level. Then we review the Dirac equation, and introduce QED. We then perform several example calculations in QED. The appendices gives a survey of Gamma matrices and use of Feynman

ALEX NELSON

2009-01-01

116

Hierarchical Hybrid Block Diagrams  

Microsoft Academic Search

Block diagram languages are now commonly used to design and even implement embedded systems. In the design phase, they are used to model both plant and controller, typically with continuous and discrete modeling respectively. The semantics of these lan- guages are often vague and\\/or complex, which is fine for some users but leaves others puzzled by the behav- iors they

Ben Denckla; Pieter J. Mosterman

117

Venn Diagrams and Logic  

NSDL National Science Digital Library

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.

2011-01-04

118

Interactive Molecular Orbital Diagrams  

NSDL National Science Digital Library

Here is an application for constructing the molecular orbital electron configurations of heteronuclear diatomic molecules. Energy level diagrams are given for the two different cases encountered in heteronuclear diatomics of the first short period (Li2 - Ne2). This is a useful tool for having students explore questions of bond order, magnetic properties and numbers of unpaired electrons.

119

A knowledge-based system for the schematic design of passive solar buildings  

SciTech Connect

A knowledge-based computer-aided architectural design system (KB-CAAD) for the schematic design and evaluation of passive solar buildings is presented. The KB-CAAD system is based on the integration of knowledge-based and procedural simulation methods with any available CAAD system for building representation. The knowledge base contains the heuristic rules for the design of passive solar buildings. Whenever possible, the knowledge base guides the designer through the decision-making process. However, if the rules of thumb are not acceptable for the particular design problem, the KB-CAAD system guides the architect by using a procedural stimulation model. At present, the development of the KB-CAAD system for the schematic-conceptual design phase of energy-conscious building has been implemented. Hence, the system in its present state is capable of handling the geometrical parameters in the design. The authors demonstrate, by a case study, not only that the KB-CAAD system leads to the design of better solar buildings, but that it takes less time and manpower to introduce the geometrical data that would be needed for a regular nonsolar building representation.

Shaviv, E. (Technion-Israel Inst. of Technology, Haifa (IL)); Peleg, U.J. (Computer Applications in Architecture, ACA-Architecture and Computer Aids Ltd., Ramat Gan (IL))

1990-01-01

120

Cable Bundle Wire Derating  

NASA Technical Reports Server (NTRS)

The allowable operating currents of electrical wiring when used in the space vacuum environment is predominantly determined by the maximum operating temperature of the wire insulation. For Kapton insulated wire this value is 200 C. Guidelines provided in the Goddard Space Flight Center (GSFC) Preferred Parts List (PPL) limit the operating current of wire within vacuum to ensure the maximum insulation temperature is not exceeded. For 20 AWG wire, these operating parameters are: 3.7 amps per wire, bundle of 15 or more wires, 70 C environment, and vacuum of 10(exp -5) torr or less. To determine the behavior and temperature of electrical wire at different operating conditions, a thermal vacuum test was performed on a representative electrical harness of the Hubble Space Telescope (HST) power distribution system. This paper describes the test and the results.

Lundquist, Ray A.; Leidecker, Henning

1998-01-01

121

Cable Bundle Wire Derating  

NASA Technical Reports Server (NTRS)

The allowable operating currents of electrical wiring when used in the space vacuum environment is predominantly determined by the maximum operating temperature of the wire insulation. For Kapton insulated wire this value is 200 C. Guidelines provided in the Goddard Space Flight Center (GSFC) Preferred Parts List (PPL) limit the operating current of wire within vacuum to ensure the maximum insulation temperature is not exceeded. For 20 AWG wire, these operating parameters are: (1) 3.7 amps per wire; (2) bundle of 15 or more wires; (3) 70 C environment: and (4) vacuum of 10(exp -5) torr or less. To determine the behavior and temperature of electrical wire at different operating conditions, a thermal vacuum test was performed on a representative electrical harness of the Hubble Space Telescope (HST) power distribution system. This paper describes the test and the results.

Lundquist, Ray A.; Leidecker, Henning

1998-01-01

122

Simultaneity Spacetime Diagram Model  

NSDL National Science Digital Library

The Simultaneity Spacetime Diagram model uses light-trajectories to show the effect of relative motion when observing (recording) events in special relativity. In the default scenario, an explosion (an event) at the center of a right-moving stick occurs at t=0 and the arrival of the explosion light signal at each end is recorded. The arrival event at the left end occurs before the arrival event at the right end because the stick is moving. How do the location and time of these events change if they are observed in a reference frame (the Other Frame) in which the stick is stationary?   The Simultaneity Spacetime Diagram model was written for the study of special relativity the Lorentz transformation using spacetime diagrams and is a supplemental simulation for an article by Sebastien Cromier and Richard Steinberg "The Twin Twin Paradox: Exploring Student Approaches to Understanding Relativistic Concepts" in the The Physics Teacher 48 (9), 598-601 (2010). Initial conditions, such as the locations of the explosion and the detectors, can be adjusted by dragging before the simulation is run. The slider can be used to change the speed of the stick. A third view shows the stick and the wavefront in space. More importantly, a checkbox allows users to compare the predictions of Galilean and special relativity in order to observe how the assumption of a constant speed of light leads to the relativity of simultaneity.   The Simultaneity Spacetime Diagram model was created using the Easy Java Simulations (EJS) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_sr_SimultaneitySpacetimeDiagram.jar file will run the program if Java is installed.

Christian, Wolfgang

2010-10-07

123

Slide the wire  

NSDL National Science Digital Library

The animation shows a top view of four wires in a conducting loop and a galvanometer. Determine the direction of the magnetic field, Bz(x), passing through the wires at various postions by click-dragging the black wire back and forth and observing the galvanometer reading.

Christian, Wolfgang; Belloni, Mario

2008-02-09

124

Flying wires at Fermilab  

Microsoft Academic Search

Transverse beam profile measurement systems called flying wires have been installed and made operational in the Fermilab Main Ring and Tevatron accelerators. A flying wire is a device that passes (flies) a 25-?m carbon filament through a particle beam, transversely, at a constant velocity of between 2 and 5 m\\/s. Collisions between the beam particles and the wire produce secondary

J. Gannon; C. Crawford; D. Finley; R. Flora; T. Groves; M. MacPherson

1989-01-01

125

An Introduction to Tree Diagrams  

NSDL National Science Digital Library

This brief article describes the use of tree diagrams in calculating probabilities. The author provides examples of how tree diagrams are used to calculate specific probabilities and why the language chosen relates to the operations used to find the probability.

Cork, Stu

2014-01-01

126

Pattern Recognition of Logic Diagrams.  

National Technical Information Service (NTIS)

This paper presents the development of line following and line analysis pattern recognition routines to automatically computer read hand-drawn logic diagrams. The decision criterion used was based on a tree analysis of segmented lines. The logic diagrams ...

D. A. Naegele

1973-01-01

127

TEP process flow diagram  

Microsoft Academic Search

This presentation describes the development of the proposed Process Flow Diagram (PFD) for the Tokamak Exhaust Processing System (TEP) of ITER. A brief review of design efforts leading up to the PFD is followed by a description of the hydrogen-like, air-like, and waterlike processes. Two new design values are described; the mostcommon and most-demanding design values. The proposed PFD is

R Scott Wilms; Bryan Carlson; James Coons; William Kubic

2008-01-01

128

Conventions for Block Diagram Representations  

Microsoft Academic Search

Although the use of block diagrams to represent various systems is very widespread, there are no standard conventions for the drawing of block diagrams. This is particularly true when such diagrams are used to represent complex nonlinear systems, and most practical systems of interest are of this type. The purpose of this paper is to suggest an approach to the

A. Bose; P. M. Anderson; C. Concordia; A. A. Fouad; P. Kundur; R. P. Schulz

1986-01-01

129

Modeling process flow using diagrams  

Microsoft Academic Search

In the practice of process improvement, tools such as the flowchart, the value-stream map (VSM), and a variety of ad hoc variants of such diagrams are commonly used. The purpose of this paper is to present a clear, precise, and consistent framework for the use of such flow diagrams in process improvement projects. The paper finds that traditional diagrams, such

Benjamin Kemper; Jeroen de Mast; Michel Mandjes

2010-01-01

130

Gold wire stress analysis of wire feed system in automatic wire bonder  

Microsoft Academic Search

The wire feed system is an important subsystem of typical automatic wire bonder. The resistance control of wire transmission and tensile force control are the key technologies of the wire feed system, which has a strong impact on the bonding quality. This paper describes the stress analysis of gold wire in the automatic wire bonder. The analysis is useful in

Yuetao Liu; Yanjie Liu; Lining Sun; Ji Li

2009-01-01

131

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

NASA Technical Reports Server (NTRS)

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.

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

1991-01-01

132

Schematic way to find solution of the outcoupled matter wave with a source term  

SciTech Connect

We propose a schematic way to obtain solution of the outcoupled atom laser beam wave function in the presence of a source term where the beam is influenced by gravity. In this case, we only focus on the external potentials inside the region of Bose-Einstein condensate that are generated by electromagnetic source and gravity. Since the evolution of the atom laser beam can be portrayed through the ordinary Schrödinger equation with a source, we are allowed to express the general solution as the superposition of the homogeneous solution and particular solution. With the given external potentials and ansatz solutions, we attain that the obtained energy depends on the parameter constituting to the ratio between the longitudinal frequency and transverse frequency.

Prayitno, T. B. [Physics Department, Faculty of Mathematics and Natural Science, Universitas Negeri Jakarta, Jl. Pemuda Rawamangun No. 10, Jakarta, 13220 (Indonesia)] [Physics Department, Faculty of Mathematics and Natural Science, Universitas Negeri Jakarta, Jl. Pemuda Rawamangun No. 10, Jakarta, 13220 (Indonesia)

2013-09-09

133

Conservative generalized bifurcation diagrams  

NASA Astrophysics Data System (ADS)

Bifurcation cascades in conservative systems are shown to exhibit a generalized diagram, which contains all relevant informations regarding the location of periodic orbits (resonances), their width (island size), irrational tori and the infinite higher-order resonances, showing the intricate way they are born. Contraction rates for islands sizes, along period-doubling bifurcations, are estimated to be ?I?3.9. Results are demonstrated for the standard map and for the continuous Hénon-Heiles potential. The methods used here are very suitable to find periodic orbits in conservative systems, and to characterize the regular, mixed or chaotic dynamics as the nonlinear parameter is varied.

Manchein, Cesar; Beims, Marcus W.

2013-04-01

134

Thin wire pointing method  

NASA Astrophysics Data System (ADS)

A method is described for forming sharp tips on thin wires, in particular phosphor bronze wires of diameters such as one-thousandth inch used to contact micron size Schottky barrier diodes, which enables close control of tip shape and which avoids the use of highly toxic solutions. The method includes dipping an end of a phosphor bronze wire into a dilute solution of sulfamic acid and applying a current through the wire to electrochemically etch it. The humidity in the room is controlled to a level of less than 50%, and the voltage applied between the wire and another electrode in the solutions is a half wave rectified voltage. The current through the wire is monitored, and the process is stopped when the current falls to a predetermined low level.

Green, G.; Mattauch, R. J.

1983-03-01

135

Thin wire pointing method  

NASA Technical Reports Server (NTRS)

A method is described for forming sharp tips on thin wires, in particular phosphor bronze wires of diameters such as one-thousandth inch used to contact micron size Schottky barrier diodes, which enables close control of tip shape and which avoids the use of highly toxic solutions. The method includes dipping an end of a phosphor bronze wire into a dilute solution of sulfamic acid and applying a current through the wire to electrochemically etch it. The humidity in the room is controlled to a level of less than 50%, and the voltage applied between the wire and another electrode in the solutions is a half wave rectified voltage. The current through the wire is monitored, and the process is stopped when the current falls to a predetermined low level.

Green, G.; Mattauch, R. J. (inventors)

1983-01-01

136

Most wired 2011.  

PubMed

Hospitals made steady progress over the past year in their use of information technology, but federal criteria for meaningful use have thrown a bit of a monkey wrench in those efforts. H&HN's annual Most Wired Survey shows how far the field has come and where it must sharpen its focus. The 2011 Most Wired list includes 154 organizations. We also name the Most Improved, Most Wired-Small and Rural and the Innovators. PMID:21834435

Weinstock, Matthew; Hoppszallern, Suzanna

2011-07-01

137

Sintered wire annode  

DOEpatents

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.

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

2007-12-25

138

Concealed wire tracing apparatus  

DOEpatents

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 is disclosed. 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 receivers position with respect to the wiring. The receivers audible signal is strongest when the receiver is directly above the wiring and the long axis of the receivers 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. 4 figs.

Kronberg, J.W.

1994-05-31

139

Influences of Source-Item Contingency and Schematic Knowledge on Source Monitoring: Tests of the Probability-Matching Account  

ERIC Educational Resources Information Center

The authors investigated conditions under which judgments in source-monitoring tasks are influenced by prior schematic knowledge. According to a probability-matching account of source guessing (Spaniol & Bayen, 2002), when people do not remember the source of information, they match source-guessing probabilities to the perceived contingency…

Bayen, Ute J.; Kuhlmann, Beatrice G.

2011-01-01

140

Schematization and Sentence Processing by Foreign Language Learners: A Reading-Time Experiment and a Stimulated-Recall Analysis  

ERIC Educational Resources Information Center

This article examines how learners of English as a foreign language process reduced relative clauses (RRCs) from the perspective of usage-based language learning, which posits that language knowledge forms a hierarchy from item-based knowledge consisting only of entrenched frequent exemplars to more advanced schematized knowledge. Twenty-eight…

Tode, Tomoko

2012-01-01

141

Effects of Analogical vs. Schematic Illustrations on Initial Learning and Retention of Technical Material by Eighth-Grade Students.  

ERIC Educational Resources Information Center

The effects of analogical and schematic illustrations on the comprehension and retention of expository prose were compared. The population was 191 eighth-grade students at Mahomet Junior High School, Illinois; 134 students' scores were used. Subjects were assigned to two groups through the random distribution of treatment booklets that included a…

McAlister, Brian K.

142

Using a Schematic Model to Represent Influences on, and Relationships between, Teachers'Problem-Solving Beliefs and Practices  

ERIC Educational Resources Information Center

Schematic models have been used extensively in educational research to represent relationships between variables diagrammatically, including the interrelationships between factors associated with teachers' beliefs and practices. A review of such models informed the development of a new model that was used to plan an investigation into primary…

Anderson, Judy; White, Paul; Sullivan, Peter

2005-01-01

143

Lubrication Basics for Wire Ropes  

Microsoft Academic Search

Wire rope forms an important part of many machines and structures. It is comprised of continuous wire strands wound around a central core. There are many kinds of wire rope designed for different applications. Most of them are steel wires made into strands wound with each other. The core can be made of steel, rope or even plastics. Wire ropes

Jeffrey E. Turner; Christopher Barnes

144

Failure of crane wire rope  

Microsoft Academic Search

A failure analysis of a broken multi strand wire rope from a crane was performed. The fracture of the steel wires in the wire rope showed characteristics of fatigue. On the wire surface were observed decarburised cracks which act as initiation sites for fatigue crack propagation during the application of the wire rope. The main reasons for the failure of

M. Torkar; B. Arzenšek

2002-01-01

145

Tripodal schematic design of the control architecture for the service robot PSR  

Microsoft Academic Search

This paper describes a control architecture design and a system integration strategy for the autonomous service robot PSR(Public Service Robot). The PSR is under development at the KIST(Korea Institute of Science and Technology) for service tasks in public spaces such as office buildings and hospitals. The proposed control architecture is designed by tripodal frameworks, which are layered functionality diagram, class

Gunhee Kim; Woojin Chung; Munsang Kim; Chongwon Lee

2003-01-01

146

Wire Array Photovoltaics  

NASA Astrophysics Data System (ADS)

Over the past five years, the cost of solar panels has dropped drastically and, in concert, the number of installed modules has risen exponentially. However, solar electricity is still more than twice as expensive as electricity from a natural gas plant. Fortunately, wire array solar cells have emerged as a promising technology for further lowering the cost of solar. Si wire array solar cells are formed with a unique, low cost growth method and use 100 times less material than conventional Si cells. The wires can be embedded in a transparent, flexible polymer to create a free-standing array that can be rolled up for easy installation in a variety of form factors. Furthermore, by incorporating multijunctions into the wire morphology, higher efficiencies can be achieved while taking advantage of the unique defect relaxation pathways afforded by the 3D wire geometry. The work in this thesis shepherded Si wires from undoped arrays to flexible, functional large area devices and laid the groundwork for multijunction wire array cells. Fabrication techniques were developed to turn intrinsic Si wires into full p-n junctions and the wires were passivated with a-Si:H and a-SiNx:H. Single wire devices yielded open circuit voltages of 600 mV and efficiencies of 9%. The arrays were then embedded in a polymer and contacted with a transparent, flexible, Ni nanoparticle and Ag nanowire top contact. The contact connected >99% of the wires in parallel and yielded flexible, substrate free solar cells featuring hundreds of thousands of wires. Building on the success of the Si wire arrays, GaP was epitaxially grown on the material to create heterostructures for photoelectrochemistry. These cells were limited by low absorption in the GaP due to its indirect bandgap, and poor current collection due to a diffusion length of only 80 nm. However, GaAsP on SiGe offers a superior combination of materials, and wire architectures based on these semiconductors were investigated for multijunction arrays. These devices offer potential efficiencies of 34%, as demonstrated through an analytical model and optoelectronic simulations. SiGe and Ge wires were fabricated via chemical-vapor deposition and reactive ion etching. GaAs was then grown on these substrates at the National Renewable Energy Lab and yielded ns lifetime components, as required for achieving high efficiency devices.

Turner-Evans, Dan

147

Argument Diagramming: The Araucaria Project  

NASA Astrophysics Data System (ADS)

Formal arguments, such as those used in science, medicine and law to establish a conclusion by providing supporting evidence, are frequently represented by diagrams such as trees and graphs. We describe the software package Araucaria which allows textual arguments to be marked up and represented as standard, Toulmin or Wigmore diagrams. Since each of these diagramming techniques was devised for a particular domain or argumentation, we discuss some of the issues involved in translating between diagrams. The exercise of translating between different diagramming types illustrates that any one diagramming system often cannot capture all of the nuances inherent in an argument. Finally, we describe some areas, such as critical thinking courses in colleges and universities and the analysis of evidence in court cases, where Araucaria has been put to practical use.

Rowe, Glenn; Reed, Chris

148

Construct Validity of the BEM Sex Role Inventory (BSRI): Does the BSRI Distinguish between Gender-Schematic and Gender-Aschematic Individuals?  

ERIC Educational Resources Information Center

Factor analyses were performed on the masculine, feminine, and neutral items of the Bem Sex Role Inventory (BSRI) for gender-schematic and gender-aschematic individuals separately. Results support the BSRI as a valid measure for distinguishing gender-schematic from gender-aschematic individuals. (FMW)

Schmitt, Bernd H.; Millard, Robert T.

1988-01-01

149

Fuse Wire Arc Tester.  

National Technical Information Service (NTIS)

To compare the viability of the new fuse wire arc test (FWAT) as a substitute for the comparative tracking index (CTI) for determining surface resistance to electrical tracking, the Bureau of Mines constructed a fuse wire arc tester and undertook a detail...

P. G. Kovalchik

1987-01-01

150

Commercial and Industrial Wiring.  

ERIC Educational Resources Information Center

This module is the third in a series of three wiring publications, includes additional technical knowledge and applications required for job entry in the commercial and industrial wiring trade. The module contains 15 instructional units that cover the following topics: blueprint reading and load calculations; tools and equipment; service;…

Kaltwasser, Stan; Flowers, Gary

151

Wire Bond Temperature Sensor  

Microsoft Academic Search

This work reports the first demonstration of a bond pad test structure with embedded thermopile sensors for the measurement of the transient temperature response during the wire bonding operation. This paper will present the design and operation of the bond pad test structure and show and discuss temperature measurements during the wire bonding operation. The test structure can be used

Shivesh Suman; Michael Gaitan; Yogendra Joshi; George Harman

152

Behind the folding funnel diagram.  

PubMed

This Commentary clarifies the meaning of the funnel diagram, which has been widely cited in papers on protein folding. To aid in the analysis of the funnel diagram, this Commentary reviews historical approaches to understanding the mechanism of protein folding. The primary role of free energy in protein folding is discussed, and it is pointed out that the decrease [corrected] in the configurational entropy as the native state is approached hinders folding, rather than guiding it. Diagrams are introduced that provide a less ambiguous representation of the factors governing the protein folding reaction than the funnel diagram. PMID:21685880

Karplus, Martin

2011-07-01

153

Army Wire Rope Inspection Program.  

National Technical Information Service (NTIS)

This report covers an investigation into the Army's wire rope nondestructive inspection procedures and needs. Major Army users of wire rope were located and surveyed for information on their wire rope inspection procedures. The Navy has conducted an inves...

K. S. Chapman

1983-01-01

154

Customized schematic eye model for refraction correction design based on ocular wavefront and corneal topography measurements  

NASA Astrophysics Data System (ADS)

The subject of this paper relates to the ocular optical design and vision analysis of refractive correction of the eye. After the purpose statement and the assumption list, the concept of the schematic eye matching a particular (measured) wavefront is introduced. This concept is based on the fact that the ocular wavefront, together with the corneal topography, can be seen as the mathematical global representation of the eye working in monochromatic light and having a foveal vision. The discussed design technique, including an iterative optimization method, could be applied in any ocular correction that utilizes cornea topography and/or ocular wavefront, e.g. contact lens or intra-corneal implant. However, the application this paper refers to is the ocular refractive correction by a procedure using the LADARVISION. It consists of surgical removal and subsequent replacement of a corneal flap on a stromal surface whose shape has been changed by laser ablation of the tissue. Subsequent sections of this paper are dedicated to establishing the limits of possible refractive correction, the influences of the flap and corneal topography into the refractive correction calculation. Finally a realistic evaluation of the results and a list of possible developments of this new optical design method are discussed.

Curatu, Eugene O.; Pettit, George H.; Campin, John A.

2002-06-01

155

Morphodynamic reaction of a schematic river to sediment input changes: Analytical approaches  

NASA Astrophysics Data System (ADS)

The paper investigates the morphodynamic reaction of a schematic river to a perturbation of the sediment input imposed at its upstream end. The consequent evolution of the initially equilibrium river can be studied by means of various models (0-dimensional; 1-D parabolic and 1-D hyperbolic with uniform sediments; 1-D hyperbolic with graded sediments), depending on the more or less simplified differential equations applied for describing the water and sediment motion. The paper discusses a number of analytical solutions obtained with two types of boundary conditions, namely: (i) stepwise change of the sediment input, very often connected to anthropogenic actions, and (ii) sinusoidal input variation with prescribed period, typically associated to the meteorological cycles (short period) or to the geological and climate change (long period). The solutions provide an explicit expression for the Response Time of the river for the condition (i) and the Attenuation Length of the river for the condition (ii). The two quantities as defined in this paper do have a specific physical meaning, strictly connected with the corresponding boundary conditions, which measures the reactivity of the river to external disturbances. A comparative application of the analytical solutions to various (prevalently large) rivers of the world is given, together with a final discussion.

Di Silvio, G.; Nones, M.

2014-06-01

156

Wire breakage in SLC wire profile monitors.  

National Technical Information Service (NTIS)

Wire scanning beam profile monitors are used at the Stanford Linear Collider (SLC) for emittance preservation control and beam optics optimization. Twenty such scanners have proven most useful for this purpose and have performed a total of 1.5 million sca...

C. Field, D. McCormick, P. Raimondi, M. Ross

1998-01-01

157

Physiology Flow-Diagram Models  

NSDL National Science Digital Library

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.

PhD Sandra J Bruner (Polk Community College Biology)

2005-10-04

158

Potential-pH Diagrams.  

ERIC Educational Resources Information Center

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)

Barnum, Dennis W.

1982-01-01

159

Next Generation Wiring  

NASA Technical Reports Server (NTRS)

Wiring is a major operational component on aerospace hardware that accounts for substantial weight and volumetric space. Over time wire insulation can age and fail, often leading to catastrophic events such as system failure or fire. The next generation of wiring must be reliable and sustainable over long periods of time. These features will be achieved by the development of a wire insulation capable of autonomous self-healing that mitigates failure before it reaches a catastrophic level. In order to develop a self-healing insulation material, three steps must occur. First, methods of bonding similar materials must be developed that are capable of being initiated autonomously. This process will lead to the development of a manual repair system for polyimide wire insulation. Second, ways to initiate these bonding methods that lead to materials that are similar to the primary insulation must be developed. Finally, steps one and two must be integrated to produce a material that has no residues from the process that degrades the insulating properties of the final repaired insulation. The self-healing technology, teamed with the ability to identify and locate damage, will greatly improve reliability and safety of electrical wiring of critical systems. This paper will address these topics, discuss the results of preliminary testing, and remaining development issues related to self-healing wire insulation.

Medelius, Petro; Jolley, Scott; Fitzpatrick, Lilliana; Vinje, Rubiela; Williams, Martha; Clayton, LaNetra; Roberson, Luke; Smith, Trent; Santiago-Maldonado, Edgardo

2007-01-01

160

Distribution of wire deformation within strands of wire ropes  

Microsoft Academic Search

Using ANSYS software, we developed a modeling program for several kinds of wire ropes with metal cores and built a geometric model for the 6×19 IWS wire rope. Through proper grid partitioning, a finite element model for calculating the deformation of wire rope was obtained. Completely constraining one end of the wire rope and applying an axial force to the

Jun MA; Shi-rong GE; De-kun ZHANG

2008-01-01

161

Influences of Source - Item Contingency and Schematic Knowledge on Source Monitoring: Tests of the Probability-Matching Account  

PubMed Central

The authors investigated conditions under which judgments in source-monitoring tasks are influenced by prior schematic knowledge. According to a probability-matching account of source guessing (Spaniol & Bayen, 2002), when people do not remember the source of information, they match source guessing probabilities to the perceived contingency between sources and item types. When they do not have a representation of a contingency, they base their guesses on prior schematic knowledge. The authors provide support for this account in two experiments with sources presenting information that was expected for one source and somewhat unexpected for another. Schema-relevant information about the sources was provided at the time of encoding. When contingency perception was impeded by dividing attention, participants showed schema-based guessing (Experiment 1). Manipulating source - item contingency also affected guessing (Experiment 2). When this contingency was schema-inconsistent, it superseded schema-based expectations and led to schema-inconsistent guessing.

Bayen, Ute J.; Kuhlmann, Beatrice G.

2010-01-01

162

75 FR 4584 - Wire Decking From China  

Federal Register 2010, 2011, 2012, 2013

...wire rack decking,'' ``wire mesh decking,'' ``bulk storage shelving...decking.'' Wire decking consists of wire mesh that is reinforced with structural supports...structural supports, that reinforce the wire mesh and that are welded or otherwise...

2010-01-28

163

Orbiter Kapton wire operational requirements and experience  

NASA Technical Reports Server (NTRS)

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.

Peterson, R. V.

1994-01-01

164

False recall is reduced by damage to the ventromedial prefrontal cortex: implications for understanding the neural correlates of schematic memory.  

PubMed

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

Warren, David E; Jones, Samuel H; Duff, Melissa C; Tranel, Daniel

2014-05-28

165

An exploration of the two-factor schematization of relation meaning and emotions among professional rugby union players  

Microsoft Academic Search

The aim of this paper was to explore Lazarus's two-factor schematization of losses and gains and the emotions generated in response to loss (threat and harm) and gain (challenge and benefit) relational meanings. Participants were 10 professional rugby union players aged between 24 and 35 years (M age?=?26.8 years, SD?=?5.92). The results revealed that at different times, the same stressor

Adam R. Nicholls; Andrew R. Levy; Leigh Jones; Malathy Rengamani; Remco C. J. Polman

2011-01-01

166

Discrete Wire Effects on Wire Array Instability  

NASA Astrophysics Data System (ADS)

We extend earlier theory (F.S. Felber, N. Rostoker. Phys. Fluids, v. 24, p. 1049 (1981).) ( A.A. Samokhin. J. Appl. Mech. Techn. Physics, v. 29, p. 243 (1988).) of wire array Z-pinch instability in the limit of wire radius, r, small compared to interwire spacing, d, to arbitrary azimuthal and axial mode structure. We assume scales <<<< array radius so the array curvature is neglected. We find the dominant growth rate approaches the classical Rayleigh-Taylor (RT) value for a thin shell once d/r becomes less than ~ 10. We also examine flow effects on instability. Recent calculations (see poster by D. B. Reisman in this session) show that the plasma is composed of high density cores surrounded by low density plasma until well into the main current pulse. Plasma flows from the RT unstable region near the cores into the interwire gap. We will estimate the effect of the flow on RT growth.

Hammer, James H.; Ruytuv, D.; Tabak, Max; Toor, A.; Liberman, M.; Reisman, D.; Degroot, J. S.

1998-11-01

167

Fluctuation of probe beam in thermolens schematics as potential indicator of cell metabolism, apoptosis, necrosis and laser impact  

NASA Astrophysics Data System (ADS)

Recently we discovered that in developed integrated flow cytometry using combination high resolution transmission and two beam (pump-probe) of photothermal microscopy with flow module the temporal fluctuation of probe beam even without pump laser pulse are very sensitive to functional states of single cells (e.g. with 2-3 differences in average fluctuation amplitude for live and dead cells). In this paper we are focusing on theoretical and experimental studies of these new phenomena using thermolens schematics with highly stabilized continuous-wave He-Ne laser and photodiode/photomultiplier with pinhole. This scheme allows to study both random and laser-induced thermolens effects in passive and active mode including short and long term monitoring of scattered light fluctuation in trans-illumination mode at single cellular and even sub-cellular levels in vitro, and in vivo. We demonstrate these schematics has some potential to monitor intracellular dynamics including change in cell metabolism, and necrosis, especially, under pump laser impacts in vitro in stationary condition. Besides, we present some relevant data obtained with other similar schematics, including evaluation of bacterial motility by dynamic light scattering. We discuss further potential developing this approach for flow cytometry with fast speed photodetector and digital camera and the multi- wavelength statistical and correlation analysis of speckle-related signals in applications to analysis of complex motions and functional properties of cells in bioflows including the evaluation of the rotational and translational components of the motion of individual live and dead cells.

Zharov, Vladimir P.; Menyaev, Yulian A.; Shashkov, Evgeny V.; Galanzha, Ekaterina I.; Khlebtsov, Boris N.; Scheludko, Andrei V.; Zimnyakov, Dmitry A.; Tuchin, Valery V.

2006-03-01

168

Deconstructing the concept of the healthy eater self-schematic: relations to dietary intake, weight and eating cognitions.  

PubMed

This study investigated differences in dietary intake, weight status, food preoccupation, and attributions about healthy eating lapses between individuals classified as healthy eater self-schematics and nonschematics. The study also assessed whether the separate dimensions of the self-schema construct (self-description as a healthy eater and perceived importance of being a healthy eater to self-image) are related to these health outcomes. College students (N=125; 82% female) completed questionnaires assessing healthy eater self-schema status, dietary intake, weight status, food preoccupation, and lapse attributions. Results revealed that females who were classified as healthy eater self-schematics ate more fruits and vegetables, ate less junk food and had lower BMIs than nonschematics. Healthy eater self-schematics also engaged in more positive thoughts and fewer negative thoughts about food, made less stable attributions about lapses in healthy eating and endorsed more personal control over lapses. When the two dimensions of the self-schema were examined separately, self-description appeared to be more related to these outcomes than perceived importance. PMID:22365791

Holub, Shayla C; Haney, Ann M; Roelse, Holly

2012-04-01

169

Wire Rope Slings.  

National Technical Information Service (NTIS)

Safe working load tables, in metric units, were prepared for the Divisional Accident Prevention Advisory Committee. At the same time an investigation was made into the possibility of preparing a Divisional Standard for wire rope slings. It is recommended ...

P. J. Bramhill

1972-01-01

170

Wire Object Detection Study.  

National Technical Information Service (NTIS)

An analytic study and an experimental feasibility demonstration of the detection of wire objects has been completed. The techniques employed were based upon the geometric compatibility of the object to be detected and the sensor used, which in this instan...

R. Kleehammer

1978-01-01

171

Axial Fatigue of Wire Rope.  

National Technical Information Service (NTIS)

Axial fatigue tests in air were conducted on wire rope, strand, and single wires under the same load spectrum with an Amsler Vibrophore machine. The wire rope tests permitted a comparison of lang and regular construction with independent wire rope core (I...

F. Matanzo S. R. Heller

1971-01-01

172

Cryogenic Pressure Seal for Wires  

NASA Technical Reports Server (NTRS)

High-pressure-seal formed by forcing polyurethane into space surrounding wire or cable in special fitting. Wire or cable routed through fitting then through a tightly fitting cap. Wire insulation left intact. Cap filled with sealant and forced onto the fitting: this pushes sealant into fitting so it seals wire or cable in fitting as well as in cap.

Ciana, J. J.

1984-01-01

173

Dual wire weld feed proportioner  

NASA Technical Reports Server (NTRS)

Dual feed mechanism enables proportioning of two different weld feed wires during automated TIG welding to produce a weld alloy deposit of the desired composition. The wires are fed into the weld simultaneously. The relative feed rates of the wires and the wire diameters determine the weld deposit composition.

Nugent, R. E.

1968-01-01

174

New Working Diagram for Membrane Separation Processes.  

National Technical Information Service (NTIS)

First a short presentation of the work diagram for rectification processes (McCabe-Thiele-diagram) is given. Then a new work diagram suitable for membrane separation processes is developed. The application in pervaporation and gas separation under cross f...

K. Hattenbach

1985-01-01

175

Particles, Feynman Diagrams and All That  

ERIC Educational Resources Information Center

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.

Daniel, Michael

2006-01-01

176

Splicing Wires Permanently With Explosives  

NASA Technical Reports Server (NTRS)

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.

Bement, Laurence J.; Kushnick, Anne C.

1990-01-01

177

Theory of superconducting wire networks and Josephson-junction arrays in magnetic fields  

Microsoft Academic Search

In this paper we study the superconducting-normal phase boundaries of a variety of wire networks and Josephson-junction arrays. We have obtained the mean-field phase diagrams for a number of geometries and compared them to the corresponding experimental data. We have introduced an analytical approach to the analysis of the structures present in the phase diagrams. We have shown in great

Qian Niu; Franco Nori

1989-01-01

178

Liquid ``Wires" for Microfluidics  

NASA Astrophysics Data System (ADS)

We demonstrate liquid ``wires'' in a simple solution measurement device. This device highlights the possibility of fabricating liquid circuits. These ``wires'' were formed by filling micro-milled PMMA channels with 5M NaCl solution. Wires were connected to these salt solution channels; the impedance of a test channel filled with solution was measured by an HP 4294A Impedance Analyzer. Deionized water, 2-propanol, and 5M NaCl were measured. Numerical simulations were performed on the channel cross-section to determine the predicted impedance of the device. The simulated results were compared to the experimental data. Graphs of simulations and experiments are presented for the frequency range 1 KHz to 110 MHz. The data show electrode polarization at the electrode-electrolyte interface, as well as parasitic capacitance inherent in the experimental arrangement.

Kellis, Nathan; Mazzeo, Aaron; Mazzeo, Brian

2009-10-01

179

Flying wires at Fermilab  

SciTech Connect

Transverse beam profile measurement systems called ''Flying Wires'' have been installed and made operational in the Fermilab Main Ring and Tevatron accelerators. These devices are used routinely to measure the emittance of both protons and antiprotons throughout the fill process, and for emittance growth measurements during stores. In the Tevatron, the individual transverse profiles of six proton and six antiproton bunches are obtained simultaneously, with a single pass of the wire through the beam. Essential features of the hardware, software, and system operation are explained in the rest of the paper. 3 refs., 4 figs.

Gannon, J.; Crawford, C.; Finley, D.; Flora, R.; Groves, T.; MacPherson, M.

1989-03-01

180

Molecular photonic wire  

SciTech Connect

We felt that an appropriate synthetic array of pigments could function as a molecular photonic wire. The structure of the molecular photonic wire is shown. A boron-dipyrromethene dye provides an optical input at one end, a linear array of three zinc porphyrins is employed as a signal transmission element, and a free base porphyrin provides an optical output at the other end. The synthesis combines modular building blocks in a stepwise manner using coupling reactions similar to those in our synthesis of multi-porphyrin light-harvesting arrays. 14 refs., 2 figs.

Wagner, R.W.; Lindsey, J.S. (Carnegie Mellon Univ., Pittsburgh, PA (United States))

1994-10-10

181

Wiring and Cabling  

NSDL National Science Digital Library

Created by Work-Ready Electronics, a project of the Advanced Technological Education program, this module introduces students to wiring and cabling principles, including transmission lines, computer network and wireless systems, and troubleshooting. The Knowledge Probes allow students to answer open-ended questions covering the content of the module, and the Learning Resources present activities, laboratories, and games to further solidify the material. The Notebook function allows visitors to take notes and review them at any time. This is an excellent resource for vocational electronics educators as a ready-made classroom introduction to wiring and cabling.

2008-12-08

182

Development and Testing of Laser Doppler System Components for Wake Vortex Monitoring. Volume 2: Scanner Operations Manual.  

National Technical Information Service (NTIS)

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 procedur...

B. B. Edwards E. W. Coffey

1974-01-01

183

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

NASA Technical Reports Server (NTRS)

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.

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

1974-01-01

184

Automatically Assessing Graph-Based Diagrams  

ERIC Educational Resources Information Center

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…

Thomas, Pete; Smith, Neil; Waugh, Kevin

2008-01-01

185

DRAWING DIAGRAMS IN AN ONLINE EXAMINATION  

Microsoft Academic Search

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

Pete Thomas

186

Steps towards a GPSS block diagram system  

Microsoft Academic Search

We first note that block diagrams have been important for the learning of GPSS and have been used in most GPSS text books. The full value of block diagrams is obtained first when they can be automatically generated from program code and that block diagrams in turn can generate code. The computer generation of block diagrams requires, however, very exact

Ingolf Ståhl

2006-01-01

187

Internal jugular vein valve morphology in the patients with chronic cerebrospinal venous insufficiency (CCSVI); angiographic findings and schematic demonstrations.  

PubMed

Chronic cerebrospinal venous insufficiency (CCSVI) is a syndrome recently described in multiple sclerosis patients. It is characterized by abnormal venous hemodynamics resulting from numerous obstacles in the main veins draining the central nervous system, usually: the internal jugular veins and the azygous vein. Internal jugular vein is the most commonly vein affected. Most of the abnormalities in this vein are located at the level of jugular valve. The aim of this review is to give venographic and schematic descriptions of the most common valvular and perivalvular anomalies found in the lower part of internal jugular vein. PMID:22338622

Al-Omari, Ma'moon Hasan; Al-Bashir, Areen

2012-05-01

188

One hundred angstrom niobium wire  

NASA Technical Reports Server (NTRS)

Composite of fine niobium wires in copper is used to study the size and proximity effects of a superconductor in a normal matrix. The niobium rod was drawn to a 100 angstrom diameter wire on a copper tubing.

Cline, H. E.; Rose, R. M.; Wulff, J.

1968-01-01

189

Improved wire chamber  

DOEpatents

An improved gas mixture for use with proportional counter devices, such as Geiger-Mueller tubes and drift chambers. The improved gas mixture provides a stable drift velocity while eliminating wire aging caused by prior art gas mixtures. The new gas mixture is comprised of equal parts argon and ethane gas and having approximately 0.25% isopropyl alcohol vapor. 2 figs.

Atac, M.

1987-05-12

190

Wires by Patchy Particles  

NSDL National Science Digital Library

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

Zhang, Zhenli

2005-01-31

191

NewsWire, 2002.  

ERIC Educational Resources Information Center

This document presents the 3 2002 issues of the newsletter "NewsWire," (volume 5). Issue Number One focuses on collaborative Web projects. This issue begins with descriptions of four individual projects: "iEARN"; "Operation RubyThroat"; "Follow the Polar Huskies!"; and "Log in Your Animal Roadkill!" Features that follow include: "Bringing the…

Byrom, Elizabeth, Ed.; Bingham, Margaret, Ed.; Bowman, Gloria, Ed.; Shoemaker, Dan, Ed.

2002-01-01

192

Polyphosphazene Wire Coverings.  

National Technical Information Service (NTIS)

A 2:3 ((C6H5O)2PN- (4-C2H5C6H4O)2PN)n copolymer was selected from several candidates for compounding studies to develop fire-retardant electrical wire insulation. All formulations prepared did not contain halogen either in the polymer or in the filler sys...

K. A. Reynard J. C. Vicic

1976-01-01

193

Reliable Wiring Harness  

NASA Technical Reports Server (NTRS)

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.

Gaspar, Kenneth C.

1987-01-01

194

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.

195

Residential Wiring. Second Edition.  

ERIC Educational Resources Information Center

This guide is designed to assist teachers conducting a course to prepare students for entry-level employment in the residential wiring trade. Included in the guide are six instructional units and the following sections of information for teachers: guidelines in using the unit components; academic and workplace skills classifications and…

Taylor, Mark; And Others

196

Basic Wiring. Second Edition.  

ERIC Educational Resources Information Center

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…

Kaltwasser, Stan; And Others

197

Stress controlling superconductor wire  

Microsoft Academic Search

This patent describes a superconductor wire. It comprises a thin-walled tube extending from a first end to a second end; superconductor filaments disposed within the lumen of the tube for transmitting electricity from the first end to the second end of the tube; and a solid filler contained in the tube and surrounding the filaments to provide support for the

R. L. Creedon; Y. H. L. Hsu

1991-01-01

198

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.

199

Coated Antenna Wire.  

National Technical Information Service (NTIS)

The object of this project was to develop a method for coating high modulus steel and tungsten wires with a material containing a stable high atomic number particulate filler. Since the matrix material in this composite coating is sacrificed during use a ...

D. M. Bigg M. M. Epstein R. E. Maringer

1976-01-01

200

Pseudohaptic interaction with knot diagrams  

NASA Astrophysics Data System (ADS)

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.

Weng, Jianguang; Zhang, Hui

2012-07-01

201

Semiautomatic labeling of small wires  

NASA Technical Reports Server (NTRS)

Semi-automatic-wire labeling equipment installs heat-shrink identification sleeves on small-diameter wires for moderate-size production runs. Supply reel contains wire of desired diameter and is cut into lengths set on the measuring rolls. Required number of identification sleeves are slipped over wire, which is then placed through sleeve-releasing mechanism. Sleeves are shrunk at 350 degrees F in an infrared oven.

David, L. P.; Heisman, R. M.; Keir, A. R.

1977-01-01

202

Wire EDM for Refractory Materials  

NASA Technical Reports Server (NTRS)

In an attempt to reduce fabrication time and costs, Wire Electrical Discharge Machine (Wire EDM) method was investigated as tool for fabricating matched blade roots and disk slots. Eight high-strength nickel-base superalloys were used. Computer-controlled Wire EDM technique provided high quality surfaces with excellent dimensional tolerances. Wire EDM method offers potential for substantial reductions in fabrication costs for "hard to machine" alloys and electrically conductive materials in specific high-precision applications.

Zellars, G. R.; Harris, F. E.; Lowell, C. E.; Pollman, W. M.; Rys, V. J.; Wills, R. J.

1982-01-01

203

Potential risk of sternal wires  

Microsoft Academic Search

Objective: To understand the potential fracture mechanism of sternal wires, we collected extracted stainless steel sternal wires from patients with sternal dehiscence following open-heart operations. Surface alterations and fractured ends of sternal wires were inspected and analyzed. Methods: Eight fractured and 12 non-fractured wires extracted from five patients (closure method: figure-of-eight or straight twisted; two without and three with mediastinitis)

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

2004-01-01

204

Potential risk of sternal wires  

Microsoft Academic Search

Objective: To understand the potential fracture mechanism of sternal wires, we collected extracted stainless steel sternal wires from patients with sternal dehiscence following open-heart operations. Surface alterations and fractured ends of sternal wires were inspected and analyzed. Methods: Eight fractured and 12 non-fractured wires extracted from five patients (closure method: figure-of-eight or straight twisted; two without and three with mediastinitis)

Chun-Che Shih; Chun-Ming Shih; Yea-Yang Sua; Shing-Jong Lina

2010-01-01

205

49 CFR 234.231 - Fouling wires.  

Code of Federal Regulations, 2013 CFR

...when the train detection circuit is shunted. Installation of a single duplex wire with single plug acting as fouling wires is prohibited. Existing installations having single duplex wires with a single plug for fouling wires may be continued in...

2013-10-01

206

Extending wire rope service life  

SciTech Connect

Selecting the proper wire rope is not a simple procedure. Wire rope is a precision mining machine with scores of moving parts. It is therefore important for mining equipment users to know wire rope and how it is designed and constructed. Good lubrication and regular inspection is important for a safe and long service life.

Not Available

1982-06-01

207

Resonance of metallic wire structures  

Microsoft Academic Search

Metallic wire structures form a common class of physical systems. We illustrate how to understand the general physics of the wire systems with a specific example, the split ring resonantor. We derived simple polynomial equations to determine the entire resonance spectra of split ring structures, which can be analytically solved in the limit of narrow wires. A resonance spectrum very

Lei Zhou; Y. Zhang; Siu Tat Chui

2008-01-01

208

Nano wires by self assembly  

Microsoft Academic Search

We present a technique to fabricate nano wires on silicon substrates without any lithography. The wires are 50 nm or less in width, but their lengths can be 10 s of micro meters. They can be formed by a single or multiple layers of metals. The wires can be designed to form a network which can be partially released from

Taher Saif; Erdem Alaca; Huseyin Sehitoglu

2003-01-01

209

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

NASA Astrophysics Data System (ADS)

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.

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

2001-04-01

210

Voronoi Diagrams and Spring Rain  

ERIC Educational Resources Information Center

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…

Perham, Arnold E.; Perham, Faustine L.

2011-01-01

211

INCONEL 718: A solidification diagram  

Microsoft Academic Search

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

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

1989-01-01

212

Hubble's diagram and cosmic expansion  

Microsoft Academic Search

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

Robert P. Kirshner

2004-01-01

213

Concrete and Abstract Voronoi Diagrams  

Microsoft Academic Search

The Voronoi diagram of a set of sites is a partition of the plane into regions, one to each site, such that the region of each site contains all points of the plane that are closer to this site than to the other ones. Such partitions are of great importance to computer science and many other fields. The challenge is

Rolf Klein

1989-01-01

214

Normalization of the Delano Diagram.  

National Technical Information Service (NTIS)

A normalization of the Delano y, y bar diagram is proposed in which the y heights are normalized by the entrance pupil height, the y bar heights by the image height. The normalization constants are expressed in terms of the system parameters, and it is se...

F. J. Lopez-Lopez

1970-01-01

215

Magnetic Force Three Wires Model  

NSDL National Science Digital Library

The Magnetic Force Three Wires model investigates the force between long straight current-carrying wires. Initially, the simulation shows a cross-section view of three long straight parallel wires, each on the corner of an equilateral triangle. The wires carry currents that have different magnitudes, and the currents are directed either into or out of the page. The task in this simulation is to rank the wires based on the magnitude of their currents, from largest to smallest. The Magnetic Force Three Wires model was created using the Easy Java Simulations (EJS) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_bu_Three_Wires.jar file will run the program if Java is installed. This is part of a collection of similar tutorial simulations created by the author.

Duffy, Andrew

2009-10-20

216

Absorption in atomic wires  

SciTech Connect

The transfer matrix formalism is implemented in the form of the multiple collision technique to account for dissipative transmission processes by using complex potentials in several models of atomic chains. The absorption term is rigorously treated to recover unitarity for the non-Hermitian Hamiltonians. In contrast to other models of parametrized scatterers we assemble explicit potentials profiles in the form of delta arrays, Poeschl-Teller holes, and complex Scarf potentials. The techniques developed provide analytical expressions for the scattering and absorption probabilities of arbitrarily long wires. The approach presented is suitable for modeling molecular aggregate potentials and also supports new models of continuous disordered systems. The results obtained also suggest the possibility of using these complex potentials within disordered wires to study the loss of coherence in the electronic localization regime due to phase-breaking inelastic processes.

Cervero, Jose M.; Rodriguez, Alberto [Fisica Teorica, Facultad de Ciencias, Universidad de Salamanca, 37008 Salamanca (Spain)

2004-11-01

217

Wire insulation defect detector  

NASA Technical Reports Server (NTRS)

Wiring defects are located by detecting a reflected signal that is developed when an arc occurs through the defect to a nearby ground. The time between the generation of the signal and the return of the reflected signal provides an indication of the distance of the arc (and therefore the defect) from the signal source. To ensure arcing, a signal is repeated at gradually increasing voltages while the wire being tested and a nearby ground are immersed in a conductive medium. In order to ensure that the arcing occurs at an identifiable time, the signal whose reflection is to be detected is always made to reach the highest potential yet seen by the system.

Greulich, Owen R. (Inventor)

2004-01-01

218

Dental Arch Wire  

NASA Technical Reports Server (NTRS)

Straightening teeth is an arduous process requiring months, often years, of applying corrective pressure by means of arch wires-better known as brace-which may have to be changed several times in the course of treatment. A new method has been developed by Dr. George Andreasen, orthodontist and dental scientist at the University of Iowa. The key is a new type of arch wire material, called Nitinol, with exceptional elasticity which helps reduce the required number of brace changes. An alloy of nickel and titanium, Nitinol was originally developed for aerospace applications by the Naval Ordnance Laboratory, now the Naval Surface Weapons Laboratory, White Oaks, Maryland. NASA subsequently conducted additional research on the properties of Nitinol and on procedures for processing the metal.

1979-01-01

219

Plated wire memory subsystem  

NASA Technical Reports Server (NTRS)

The work performed entailed the design, development, construction and testing of a 4000 word by 18 bit random access, NDRO plated wire memory for use in conjunction with a spacecraft imput/output unit and central processing unit. The primary design parameters, in order of importance, were high reliability, low power, volume and weight. A single memory unit, referred to as a qualification model, was delivered.

Reynolds, L.; Tweed, H.

1972-01-01

220

Superconducting magnet wire  

DOEpatents

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..

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

1986-01-01

221

Manually Operated Welding Wire Feeder  

NASA Technical Reports Server (NTRS)

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.

Rybicki, Daniel J. (Inventor)

2001-01-01

222

Reliability computation from reliability block diagrams  

NASA Technical Reports Server (NTRS)

Computer program computes system reliability for very general class of reliability block diagrams. Four factors are considered in calculating probability of system success: active block redundancy, standby block redundancy, partial redundancy, and presence of equivalent blocks in the diagram.

Chelson, P. O.; Eckstein, E. Y.

1975-01-01

223

Dual wire welding torch and method  

DOEpatents

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.

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

224

Calculation of Ceramic Phase Diagrams.  

National Technical Information Service (NTIS)

A data base is being developed for calculation of quasibinary and quasiternary phase diagrams of oxide and oxynitride ceramic systems. The current base covers combinations of Cr2O3, MgO, Al2O3, Fe2O3, Fe3O4, FeO, CaO, SiO2, Si3N4 and AlN. Lattice Stabilit...

L. Kaufman

1979-01-01

225

Phase Diagrams and Chemographic Projections  

NSDL National Science Digital Library

This exercise is a good way to get students thinking about the phase rule, metastable and stable reactions and phase diagrams. The exercise contains a lot of reading, and is suitable for in-class work or for homework. The idea is that students can do this on their own with little help from their instructor. The students only answer a few questions making this is more of a tutorial than a worksheet.

Perkins, Dexter

226

INCONEL 718: A solidification diagram  

Microsoft Academic Search

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

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

1989-01-01

227

Twistor Diagrams and Quantum Field Theory.  

NASA Astrophysics Data System (ADS)

Available from UMI in association with The British Library. Requires signed TDF. This thesis uses twistor diagram theory, as developed by Penrose (1975) and Hodges (1990c), to try to approach some of the difficulties inherent in the standard quantum field theoretic description of particle interactions. The resolution of these issues is the eventual goal of the twistor diagram program. First twistor diagram theory is introduced from a physical view-point, with the aim of studying larger diagrams than have been typically explored. Methods are evolved to tackle the double box and triple box diagrams. These lead to three methods of constructing an amplitude for the double box, and two ways for the triple box. Next this theory is applied to translate the channels of a Yukawa Feynman diagram, which has more than four external states, into various twistor diagrams. This provides a test of the skeleton hypothesis (of Hodges, 1990c) in these cases, and also shows that conformal breaking must enter into twistor diagrams before the translation of loop level Feynman diagrams. The issue of divergent Feynman diagrams is then considered. By using a twistor equivalent of the sum-over -states idea of quantum field theory, twistor translations of loop diagrams are conjectured. The various massless propagator corrections and vacuum diagrams calculated give results consistent with Feynman theory. Two diagrams are also found that give agreement with the finite parts of the Feynman "fish" diagrams of phi^4 -theory. However it is found that a more rigorous translation for the time-like fish requires new boundaries to be added to the twistor sum-over-states. The twistor diagram obtained is found to give the finite part of the relevant Feynman diagram.

O'Donald, Lewis

228

Cut diagrams for high energy scatterings  

SciTech Connect

A new approach is introduced to study QCD amplitudes at high energy and comparatively small momentum transfer. Novel cut diagrams, representing the resummation of Feynman diagrams, are used to simplify the calculation and to avoid delicate cancellations encountered in the usual approach. An explicit calculation to the sixth order is carried out to demonstrate the advantage of cut diagrams over Feynman diagrams. {copyright} {ital 1996 The American Physical Society.}

Feng, Y.J.; Hamidi-Ravari, O.; Lam, C.S. [Department of Physics, McGill University, 3600 University St., Montreal, P.Q., H3A 2T8 (CANADA)] [Department of Physics, McGill University, 3600 University St., Montreal, P.Q., H3A 2T8 (CANADA)

1996-09-01

229

Causal diagrams in systems epidemiology  

PubMed Central

Methods of diagrammatic modelling have been greatly developed in the past two decades. Outside the context of infectious diseases, systematic use of diagrams in epidemiology has been mainly confined to the analysis of a single link: that between a disease outcome and its proximal determinant(s). Transmitted causes ("causes of causes") tend not to be systematically analysed. The infectious disease epidemiology modelling tradition models the human population in its environment, typically with the exposure-health relationship and the determinants of exposure being considered at individual and group/ecological levels, respectively. Some properties of the resulting systems are quite general, and are seen in unrelated contexts such as biochemical pathways. Confining analysis to a single link misses the opportunity to discover such properties. The structure of a causal diagram is derived from knowledge about how the world works, as well as from statistical evidence. A single diagram can be used to characterise a whole research area, not just a single analysis - although this depends on the degree of consistency of the causal relationships between different populations - and can therefore be used to integrate multiple datasets. Additional advantages of system-wide models include: the use of instrumental variables - now emerging as an important technique in epidemiology in the context of mendelian randomisation, but under-used in the exploitation of "natural experiments"; the explicit use of change models, which have advantages with respect to inferring causation; and in the detection and elucidation of feedback.

2012-01-01

230

INCONEL 718: A solidification diagram  

NASA Astrophysics Data System (ADS)

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 conjunction with solidification theory to generate data points for this diagram. The important features of the diagram are an austenite (?)/Laves phase eutectic which occurs at ?19.1 wt pct Nb between austenite containing ?9.3 wt pct Nb and a Laves phase which contains ?22.4 wt pct Nb. The distribution coefficient for Nb was found to be ?0.5. The solidification sequence of INCONEL 718 was found to be (1) proeutectic ?, followed by (2) a ?/NbC eutectic at ?1250°C, followed by (3) continued ? solidification, followed by (4) a ?/Laves phase eutectic at ?1200°C. An estimate of the volume fraction eutectic is made using the Scheil solidification model, and the fraction of each phase in the eutectic is calculated via the lever rule. These are compared with experimentally determined values and found to be in good agreement.

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

1989-10-01

231

Reasoning on temporal class diagrams: Undecidability results  

Microsoft Academic Search

This paper introduces a temporal class diagram language useful to model temporal varying data. The atemporal portion of the language contains the core constructors available in both EER diagrams and UML class diagrams. The temporal part of the language is able to distin- guish between temporal and atemporal constructs, and it has the ability to represent dynamic constraints between classes.

Alessandro Artale

2006-01-01

232

Unjustified Assumptions Based on Diagrams in Geometry  

ERIC Educational Resources Information Center

We investigated unjustified assumptions made by students when proving geometric statements. Geometric statements can be presented with a diagram or without. Diagrams can be accurate or sketchy. Unjustified assumptions may originate in an accompanying diagram. We thus asked whether the way in which a statement is presented has an effect on…

Dvora, Tali; Dreyfus, Tommy

2004-01-01

233

Ion potential diagrams for electrochromic devices  

Microsoft Academic Search

Ion potential diagrams can facilitate the description of systems in which ionic species are mobile. They depict qualitatively the spatial dependence of the potential energy for mobile ions, somewhat akin to band diagrams for electrons. The authors construct ion potential diagrams for the mixed conducting (oxide), optically active electrodes of five-layer electrochromic devices, based on reversible Li{sup +} intercalation. These

Francesca Varsano; D. Cahen; F. Decker; J. F. Guillemoles; E. Masetti

1998-01-01

234

Guelph Physics Tutorials: Free Body Diagrams  

NSDL National Science Digital Library

This website offers a tutorial on free body diagrams. The tutorial includes an introduction to free body diagrams, example problems, a series of self-paced questions, and a free body diagram java applet. This is part of series of tutorials on physics and mathematics used in physics classes.

2007-04-23

235

Extending Reliability Block Diagrams to Software Architectures  

Microsoft Academic Search

Reliability block diagrams focus on components and connectors as do software architectures. However, some architectural styles possess characteristics which make traditional reliability block diagrams unusable as an analysis technique. In order to use the diagrams, they must be extended to reflect common architectural choices such as concurrency, distribution, dynamism, and implicit connectors.

Ahmed Abd-Allah

1997-01-01

236

Flow Diagram Simulator for the Cement Industry  

Microsoft Academic Search

The most important aspect of work performed in a process engineering department is the development of process flow diagrams. These diagrams display the results of energy and material balances and equipment rating calculations for a complex process plant. The development, features, and implementation of a computerized flow diagram simulation program named Fuller's interactive simulator for process engineering calculations (FISPEC) are

Bruce S. Knoll; William J. Berry

1984-01-01

237

Semantics of the Domain of Flow Diagrams  

Microsoft Academic Search

A domain of flow diagrams similar to that proposed by Scott, a domain of linear flow diagrams proposed by Goguen et al , a domain of decision table diagrams involving mfimtary branching, and a domain of processes based on the ideas of Milner and Beklc are each provided with a direct semantics, closely related to partial-function semantics, and a continuation

John C. Reynolds

1977-01-01

238

Retrieving Information from Data Flow Diagrams  

Microsoft Academic Search

For reverse engineering, we need tools that can extract information from documents written before routine digital storage was feasible. Documents contain both text and diagrams; data flow diagrams play a prominent role in software documents. Using current techniques, it is possible to recover the information in a data flow diagram by scanning the printed document and processing the data obtained.

Gregory Butler; Peter Grogono; Rajjan Shinghal; Indra A. Tjandra

1995-01-01

239

Novel quantum wire infrared photodetectors  

Microsoft Academic Search

This paper describes novel semiconductor quantum wire infrared photodetectors in the long- and very long-wavelength regions. The infrared photodetectors are based on intersubband transitions in semiconductor quantum wires and have the potential for higher operational temperature, increased signal-to-noise ratio, reduced dark current, wider spectral range and sensitivity to normal incident radiation. The quantum wire IR detectors are implemented using a

Biswajit Das; Pavan Singaraju

2005-01-01

240

On-Wire Lithography  

NASA Astrophysics Data System (ADS)

We report a high-throughput procedure for lithographically processing one-dimensional nanowires. This procedure, termed on-wire lithography, combines advances in template-directed synthesis of nanowires with electrochemical deposition and wet-chemical etching and allows routine fabrication of face-to-face disk arrays and gap structures in the range of five to several hundred nanometers. We studied the transport properties of 13-nanometer gaps with and without nanoscopic amounts of conducting polymers deposited within by dip-pen nanolithography.

Qin, Lidong; Park, Sungho; Huang, Ling; Mirkin, Chad A.

2005-07-01

241

Stress controlling superconductor wire  

SciTech Connect

This patent describes a superconductor wire. It comprises a thin-walled tube extending from a first end to a second end; superconductor filaments disposed within the lumen of the tube for transmitting electricity from the first end to the second end of the tube; and a solid filler contained in the tube and surrounding the filaments to provide support for the filaments. The filler being a solder selected from the group consisting of alloys of lead bismuth, silver, indium or mixtures thereof and the filler being a material capable of being heated to a liquified state within the tube.

Creedon, R.L.; Hsu, Y.H.L.

1991-02-05

242

NetNewsWire  

NSDL National Science Digital Library

Keeping tabs on the news (or anything else) online can be a bit overwhelming, so it's nice to know that NetNewsWire can help out. While this RSS reader can perform the usual tasks of fetching and displaying news from thousands of different websites and weblogs, it also includes a weblog editor that allows users to post to a host of different popular blogging sites. The program also features an integrated podcast manager, which will automatically send new podcasts to a selected music jukebox. This version is compatible with computers running Mac OS X 10.4 or greater.

2008-01-01

243

Doping molecular wires.  

PubMed

The concept of doping inorganic semiconductors enabled their successful application in electronic devices. Furthermore, the discovery of metal-like conduction in doped polymers started the entire field of organic electronics. In the present theoretical study, we extend the concept of doping to monomolecular wires suspended between two metal electrodes. Upon doping, the conductivity of representative model systems is found to increase by 2 orders of magnitude. More importantly, by providing a thorough understanding of the underlying mechanisms, our results pave the way for the development of novel molecular components envisioned as functional units in nanoscale devices. PMID:19505133

Heimel, Georg; Zojer, Egbert; Romaner, Lorenz; Brédas, Jean-Luc; Stellacci, Francesco

2009-07-01

244

Diagnostics for exploding wires (abstract)  

NASA Astrophysics Data System (ADS)

Two diagnostics, capable of imaging fast, high temperature, plasmas were used on exploding wire experiments at UC Irvine. An atmospheric pressure nitrogen laser (?=337.1 nm) was used to generate simultaneous shadow and shearing interferogram images with a temporal resolution of ~1 ns and a spatial resolution of 10 ?m. An x-ray backlighter imaged the exploding wire 90° with respect to the laser and at approximately the same instant in time. The backlighter spatial resolution as determined by geometry and film resolution was 25 ?m. Copper wires of diameters (25, 50, and 100 ?m) and steel wire d=25 ?m were exploded in vacuum (10-5 Torr) at a maximum current level of 12 kA, by a rectified marx bank at a voltage of 50 kV and a current rise time (quarter period) of 900 ns. Copper wires which were cleaned and then resistively heated under vacuum to incandescence for several hours prior to high current initiation, exhibited greater expansion velocities at peak current than wires which had not been heated prior to discharge. Axial variations on the surface of the wire observed with the laser were found to correlate with bulk axial mass differences from x-ray backlighting. High electron density, measured near the opaque surface of the exploding wire, suggests that much of the current is shunted outward away from the bulk of the wire.

Moosman, B.; Bystritskii, Vitaly; Wessel, F. J.; van Drie, A.

1999-01-01

245

Texture development in Galfenol wire  

NASA Astrophysics Data System (ADS)

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.

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

2013-05-01

246

Subminiature Hot-Wire Probes  

NASA Technical Reports Server (NTRS)

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.

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

1989-01-01

247

Improved superconducting magnet wire  

DOEpatents

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.

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

1983-08-16

248

WIRE, SOFIA and SIRTF  

NASA Technical Reports Server (NTRS)

WIRE, SOFIA and SIRTF are three planned NASA missions for infrared astronomy. Each will make significant contributions to the study of exo-zodiacal dust, planetary debris disks, and/or the zodiacal material within our own solar system. These missions and their measurement and scientific capabilities are synopsized. The principal contribution of these missions to this field of study will be to establish and strengthen its intellectual foundations rather than to pinpoint specific targets for planetary searches. This is consistent with their relatively near-term availability. Moreover, this intellectual understanding can assure that subsequent missions approach this subject from a sound scientific perspective which will yield valuable results independent of the success of a particular planet finding strategy. Each of these missions - most urgently WIRE with its Fall, 1998 launch date - would make good use of a list of candidate target stars for exo-zodiacal/planet-finding studies. The preparation of such a list was one of the recommendations of the exo-zodiacal workshop.

Werner, Michael

1998-01-01

249

Manufacture and quality control of interconnecting wire hardnesses, Volume 1  

NASA Technical Reports Server (NTRS)

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.

1972-01-01

250

Optical generation of Voronoi diagram.  

PubMed

We present results of experiments of diffraction by an amplitude screen, made of randomly distributed circular holes. By careful selection of the experimental parameters we obtain an intensity pattern strongly connected to the Voronoi diagram (VD) generated by the centers of the apertures. With the help of simulations we give a description of the observed phenomenon and elucidate the optimal parameters for its observation. Finally, we also suggest how it can be used for a fast, all-optical generation of VDs. PMID:18542580

Giavazzi, F; Cerbino, R; Mazzoni, S; Giglio, M; Vailati, A

2008-03-31

251

Event-related potentials when identifying or color-naming threatening schematic stimuli in spider phobic and non-phobic individuals  

Microsoft Academic Search

BACKGROUND: Previous studies revealed increased parietal late positive potentials (LPPs) in response to spider pictures in spider phobic individuals. This study searched for basic features of fear-relevant stimuli by investigating whether schematic spider images are sufficient to evoke differential behavioral as well as differential early and late ERP responses in spider phobic, social phobic (as a clinical control group), and

Iris-Tatjana Kolassa; Frauke Musial; Stephan Kolassa; Wolfgang HR Miltner

2006-01-01

252

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

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…

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

2013-01-01

253

Qualitative Spatial Interpretation of Course-of-Action Diagrams.  

National Technical Information Service (NTIS)

This paper demonstrates qualitative spatial reasoning techniques in a real-world diagrammatic reasoning task: Course-of-Action (COA) diagrams. COA diagrams are military planning diagrams that depict unit movements and tasks in a given region. COA diagrams...

J. R. Rasch K. D. Forbus R. W. Ferguson W. Turmel

2000-01-01

254

The effect of cross-section geometry of bonding wire on wire sweep for semiconductor packages  

Microsoft Academic Search

Wire diameter reduction is an effective way to reduce cost, as gold content accounts for the majority of bonding wire costs. Replacing gold wire with copper wire is another way to reduce cost. The advantages of using Cu instead of Au wire are the lower price and the higher electrical conductivity. However, the oxidation problem of copper wire during the

Huang-Kuang Kung; Bo-Wun Huang; Hsiang-Chen Hsu

2010-01-01

255

Wire and Packing Tape Sandwiches  

ERIC Educational Resources Information Center

In this article, the author describes how students can combine craft wire with clear packing tape to create a two-dimensional design that can be bent and twisted to create a three-dimensional form. Students sandwich wire designs between two layers of tape. (Contains 1 online resource.)

Rabinowitz, Sandy

2009-01-01

256

Wire Detection Algorithms for Navigation.  

National Technical Information Service (NTIS)

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. S...

R. Kasturi, O. I. Camps

2002-01-01

257

Wire Detection Algorithms for Navigation  

Microsoft Academic Search

Abstract 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

Rangachar Kasturi Sup; I Octavia; Ying Huang; Anand Narasimhamurthy; Nitin Pande

258

MT75 Wire Rope Tester.  

National Technical Information Service (NTIS)

This report summarizes the ability of the MT75 Rope Tester to detect wire rope defects both externally and internally. The test instrument performed well in its ability to detect defects purposely inplanted into test wire rope samples. However, in an actu...

K. S. Chapman

1982-01-01

259

Wire detecting apparatus and method  

Microsoft Academic Search

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

Kronberg

1991-01-01

260

Brake-By-Wire Program.  

National Technical Information Service (NTIS)

Two design iterations for electric calipers and two systems (full brake by wire and hybrid brakes) were developed for use on a ground vehicle. The program demonstrated a fully integrated-rated electric caliper and full brake- by-wire system on a sports ut...

R. J. Bowman P. F. Flanagan E. S. Baumgartner

2003-01-01

261

The Current in a Wire  

ERIC Educational Resources Information Center

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…

Thompson, Keith

2009-01-01

262

Aircraft wiring program status report  

Microsoft Academic Search

In this Naval Air Warfare Center (NAWC) Aircraft Division status report, the general and wire and cable component activities, the systems engineering activities, the aircraft wiring lead maintenance activities, the NAVAIR\\/NASA interface activities, and the Base Realignment and Closure (BRAC) Commission recommendations are presented.

Rex Beach

1995-01-01

263

Aircraft wiring program status report  

NASA Technical Reports Server (NTRS)

In this Naval Air Warfare Center (NAWC) Aircraft Division status report, the general and wire and cable component activities, the systems engineering activities, the aircraft wiring lead maintenance activities, the NAVAIR/NASA interface activities, and the Base Realignment and Closure (BRAC) Commission recommendations are presented.

Beach, Rex

1995-01-01

264

Welding wire pressure sensor assembly  

NASA Technical Reports Server (NTRS)

The present invention relates to a device which is used to monitor the position of a filler wire relative to a base material being welded as the filler wire is added to a welding pool. The device is applicable to automated welding systems wherein nonconsumable electrode arc welding processes are utilized in conjunction with a filler wire which is added to a weld pool created by the electrode arc. The invention senses pressure deviations from a predetermined pressure between the filler wire and the base material, and provides electrical signals responsive to the deviations for actuating control mechanisms in an automatic welding apparatus so as to minimize the pressure deviation and to prevent disengagement of the contact between the filler wire and the base material.

Morris, Timothy B. (inventor); Milly, Peter F., Sr. (inventor); White, J. Kevin (inventor)

1994-01-01

265

Back to the Future: Past and Future Era-Based Schematic Support and Associative Memory for Prices in Younger and Older Adults  

PubMed Central

Older adults typically display various associative memory deficits, but these deficits can be reduced when conditions allow for the use of prior knowledge or schematic support. To determine how era-specific schematic support and future simulation might influence associative memory, we examined how younger and older adults remember prices from the past as well as the future. Younger and older adults were asked to imagine the past or future, and then studied items and prices from approximately 40 years ago (market value prices from the 1970s) or 40 years in the future. In Experiment 1, all items were common items (e.g., movie ticket, coffee) and the associated prices reflected the era in question, whereas in Experiment 2, some item-price pairs were specific to the time period (e.g., typewriter, robot maid), to test different degrees of schematic support. After studying the pairs, participants were shown each item and asked to recall the associated price. In both experiments, older adults showed similar performance as younger adults in the past condition for the common items, whereas age-related differences were greater in the future condition and for the era-specific items. The findings suggest that in order for schematic support to be effective, recent (and not simply remote) experience is needed in order to enhance memory. Thus, whereas older adults can benefit from “turning back the clock,” younger adults better remember future-oriented information compared with older adults, outlining age-related similarities and differences in associative memory and the efficient use of past and future-based schematic support.

Castel, Alan D.; McGillivray, Shannon; Worden, Kendell M.

2014-01-01

266

Nano-storage wires.  

PubMed

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

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

2013-08-27

267

The forefront of practical superconducting wires  

Microsoft Academic Search

On the practical superconducting wires, such as Nb–Ti alloy wires, Nb3Sn compound wires, and bismuth system superconducting wires, the workability of long wire, transport critical current density, AC losses and mechanical properties were investigated. Practical superconducting wires of Nb–Ti alloy and Nb3Sn compound have already been used as DC superconducting windings, and are expected to be used for AC applications.

Yasuzo Tanaka

2000-01-01

268

A layout algorithm for data flow diagrams  

SciTech Connect

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, and produces as output a corresponding diagram according to the aesthetics. The basic strategy is to build incrementally the layout; first, a good topology is constructed with few crossings between edges; subsequently, the shape of the diagram is determined in terms of angles appearing along edges; and finally, dimensions are given to the graph, obtaining a grid skeleton for the diagram.

Batini, C.; Nardelli, E.; Tamassia, R.

1986-04-01

269

Process Flow Diagrams for Training and Operations  

Microsoft Academic Search

\\u000a This paper focuses on the use of process flow diagrams for training first responders who execute search and seizure warrants\\u000a at electronic crime scenes. A generic process flow framework is presented, and the design goals and layout characteristics\\u000a of process flow diagrams are discussed. An evaluation of the process flow diagrams used in training courses indicates that\\u000a they are beneficial

Jacobus Venter

2006-01-01

270

Plasma chemistry in wire chambers  

SciTech Connect

The phenomenology of wire chamber aging is discussed and fundamentals of proportional counters are presented. Free-radical polymerization and plasma polymerization are discussed. The chemistry of wire aging is reviewed. Similarities between wire chamber plasma (>1 atm dc-discharge) and low-pressure rf-discharge plasmas, which have been more widely studied, are suggested. Construction and use of a system to allow study of the plasma reactions occurring in wire chambers is reported. A proportional tube irradiated by an {sup 55}Fe source is used as a model wire chamber. Condensable species in the proportional tube effluent are concentrated in a cryotrap and analyzed by gas chromatography/mass spectrometry. Several different wire chamber gases (methane, argon/methane, ethane, argon/ethane, propane, argon/isobutane) are tested and their reaction products qualitatively identified. For all gases tested except those containing methane, use of hygroscopic filters to remove trace water and oxygen contaminants from the gas resulted in an increase in the average molecular weight of the products, consistent with results from low-pressure rf-discharge plasmas. It is suggested that because water and oxygen inhibit polymer growth in the gas phase that they may also reduce polymer deposition in proportional tubes and therefore retard wire aging processes. Mechanistic implications of the plasma reactions of hydrocarbons with oxygen are suggested. Unresolved issues in this work and proposals for further study are discussed.

Wise, J.

1990-05-01

271

Phase diagram of ammonium nitrate.  

PubMed

Ammonium Nitrate (AN) is a fertilizer, yet becomes an explosive upon a small addition of chemical impurities. The origin of enhanced chemical sensitivity in impure AN (or AN mixtures) is not well understood, posing significant safety issues in using AN even today. To remedy the situation, we have carried out an extensive study to investigate the phase stability of AN and its mixtures with hexane (ANFO-AN mixed with fuel oil) and Aluminum (Ammonal) at high pressures and temperatures, using diamond anvil cells (DAC) and micro-Raman spectroscopy. The results indicate that pure AN decomposes to N2, N2O, and H2O at the onset of the melt, whereas the mixtures, ANFO and Ammonal, decompose at substantially lower temperatures. The present results also confirm the recently proposed phase IV-IV' transition above 17 GPa and provide new constraints for the melting and phase diagram of AN to 40 GPa and 400°C. PMID:24320387

Dunuwille, Mihindra; Yoo, Choong-Shik

2013-12-01

272

Phase diagram of ammonium nitrate  

NASA Astrophysics Data System (ADS)

Ammonium Nitrate (AN) has often subjected to uses in improvised explosive devices, due to its wide availability as a fertilizer and its capability of becoming explosive with slight additions of organic and inorganic compounds. Yet, the origin of enhanced energetic properties of impure AN (or AN mixtures) is neither chemically unique nor well understood -resulting in rather catastrophic disasters in the past1 and thereby a significant burden on safety in using ammonium nitrates even today. To remedy this situation, we have carried out an extensive study to investigate the phase stability of AN at high pressure and temperature, using diamond anvil cells and micro-Raman spectroscopy. The present results confirm the recently proposed phase IV-to-IV' transition above 17 GPa2 and provide new constraints for the melting and phase diagram of AN to 40 GPa and 400 °C.

Dunuwille, M.; Yoo, C. S.

2014-05-01

273

Hubble's diagram and cosmic expansion  

NASA Astrophysics Data System (ADS)

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.

Kirshner, Robert P.

2004-01-01

274

Symmetric Monotone Venn Diagrams with Seven Curves  

NASA Astrophysics Data System (ADS)

An n-Venn diagram consists of n curves drawn in the plane in such a way that each of the 2 n possible intersections of the interiors and exteriors of the curves forms a connected non-empty region. A k-region in a diagram is a region that is in the interior of precisely k curves. A n-Venn diagram is symmetric if it has a point of rotation about which rotations of the plane by 2?/n radians leaves the diagram fixed; it is polar symmetric if it is symmetric and its stereographic projection about the infinite outer face is isomorphic to the projection about the innermost face. A Venn diagram is monotone if every k-region is adjacent to both some (k - 1)-region (if k > 0) and also to some k + 1 region (if k < n). A Venn diagram is simple if at most two curves intersect at any point. We prove that the "Grünbaum" encoding uniquely identifies monotone simple symmetric n-Venn diagrams and describe an algorithm that produces an exhaustive list of all of the monotone simple symmetric n-Venn diagrams. There are exactly 23 simple monotone symmetric 7-Venn diagrams, of which 6 are polar symmetric.

Cao, Tao; Mamakani, Khalegh; Ruskey, Frank

275

Ion potential diagrams for electrochromic devices  

SciTech Connect

Ion potential diagrams can facilitate the description of systems in which ionic species are mobile. They depict qualitatively the spatial dependence of the potential energy for mobile ions, somewhat akin to band diagrams for electrons. The authors construct ion potential diagrams for the mixed conducting (oxide), optically active electrodes of five-layer electrochromic devices, based on reversible Li{sup +} intercalation. These serve to analyze stability problems that arise in these systems. The authors then use them as building blocks to arrive at ion diagrams for complete devices. This allows analyses of (dis)coloration kinetics.

Varsano, F. [Weizmann Inst. of Science, Rehovot (Israel). Dept. of Materials and Interfaces]|[Univ. di Roma La Sapienza, Rome (Italy). Dipt. di Chimica; Cahen, D. [Weizmann Inst. of Science, Rehovot (Israel). Dept. of Materials and Interfaces; Decker, F. [Univ. di Roma La Sapienza, Rome (Italy). Dipt. di Chimica; Guillemoles, J.F. [Weizmann Inst. of Science, Rehovot (Israel). Dept. of Materials and Interfaces]|[CNRS, Paris (France). Lab. d`Electrochimie; Masetti, E. [ENEA, Rome (Italy). Sezione Dispositivi Ottici

1998-12-01

276

Atomic and molecular wires  

NASA Astrophysics Data System (ADS)

The study of molecular electronics has an ambitious but realistic goal: the use of synthesis, assembly and miniaturation on the molecular level to achieve a huge density of devices such as molecular wires, rectifiers, switches, transistors and memories. With a characteristic length about one nanometer, the molecules are also expected to provide unprecendented confined systems for the study of quantum confinement effects and single electron tunneling effects. This thesis describes work on the electronic transport properties of conjugated molecules. The experimental system relies on a thermodynamically driven self-assembling process to attach molecules onto gold surfaces. We describe two techniques, called a "break junction" and a "nanopore", to connect the molecules to macroscopic leads. Pronounced conductance quantization using break junctions is reported, indicating that an atomic scale metallic quantum point contact is formed in such structures. Deposition of benzene-1,4-dithiol is demonstrated to change the current-voltage characteristics of the junction dramatically, indicative of molecules bridging the tunneling gap between the two gold electrodes. The "nanopore" technique is developed to construct intrinsically stable metal/self-assembled monolayer/metal sandwich structures. This technique enables low temperature transport studies on the molecular junctions and therefore the critical transport mechanisms can be determined. The so-called gated transport due to conformation changes is also observed for one type of molecules.

Zhou, Chongwu

1999-10-01

277

Demonstrating Forces between Parallel Wires.  

ERIC Educational Resources Information Center

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)

Baker, Blane

2000-01-01

278

Smart Wire Grid: Resisting Expectations  

ScienceCinema

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.

Ramsay, Stewart; Lowe, DeJim

2014-04-09

279

The 100 most wired 2004.  

PubMed

Even as they speed ahead in their quest to improve quality and operations, the top IT hospitals are shifting gears away from a fascination with whiz-bang technology to the nitty-gritty work that ensures success. In the foldout, you'll find the 100 Most Wired, Innovator Award winners, Most Wired-Small and Rural, Most Wireless and Most Improved. PMID:15303684

Solovy, Alden

2004-07-01

280

29 CFR 1919.79 - Wire rope.  

Code of Federal Regulations, 2013 CFR

...Labor 7 2013-07-01 2013-07-01 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...

2013-07-01

281

Partial Discharge Detection of Continuous Length Wire  

Microsoft Academic Search

The ability to eliminate or minimize defects in high voltage wire can help in extending system reliability by eliminating or minimizing sources of partial discharge. Partial discharge testing of single conductor wire is traditionally performed on discrete lengths of wire or wires terminated to connectors. However, when excessive partial discharge is detected in completed assemblies, expensive rework is the result.

J. L. Rush

2006-01-01

282

New Bonding Wire for Fine Pitch Applications  

Microsoft Academic Search

Over the past few years the trend in bonding wire applications has been characterized by the minimisation of assembling components, and has in turn led to thinner wire and finer pad and pitch size. In particular for gold bonding thinner wire means less expense for precious metal. The requirements for such small wire diameters can only partially be met by

E. Milke; T. Mueller; A. Bischoff

2007-01-01

283

47 CFR 32.2431 - Aerial wire.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Aerial wire. 32.2431 Section 32.2431...Balance Sheet Accounts § 32.2431 Aerial wire. (a) This account shall include...cost of drop and block wires served by aerial wire shall be included in Account...

2013-10-01

284

The voronoi diagram of three lines  

Microsoft Academic Search

We give a complete description of the Voronoi diagram of three lines in R3. In particular, we show that the topology of the Voronoi diagram is invariant for three lines in general position, that is, that are pairwise skew and not all parallel to a common plane. The tri- sector consists of four unbounded branches of either a non-singular quartic

Hazel Everett; Sylvain Lazard; Daniel Lazard; Mohab Safey El Din

2007-01-01

285

Model Checking Activity Diagrams in TCM  

Microsoft Academic Search

We give a brief description of our (prototype) implementation in TCM [4] of an execution al-gorithm for activity diagrams. The execution algorithm translates an activity diagram into its corresponding execution structure. This execution structure is input for a model checker. With a model checker, requirements on the execution structure can be verified. Currently, we only use our own variant of

Rik Eshuis

286

Towards the Automatic Generation of Software Diagrams  

Microsoft Academic Search

The authors formulate the criteria for drawing dataflow diagrams and describe the placement and routing algorithms used in a system called MONDRIAN. A generalized approach to the question of software diagrams is proposed based on the authors' experience with MONDRIAN and a metasystem approach to the creation of CASE (computer-aided software engineering) environments. A formal approach to the definition of

L. Beth Protsko; Paul G. Sorenson; J. Paul Tremblay; Douglas A. Schaefer

1991-01-01

287

Understanding Machines from Text and Diagrams.  

National Technical Information Service (NTIS)

Instructional materials typically use both text and diagrams to explain how machines work. In this paper we give an account of what information is involved in understanding a mechanical device and the role that diagrams might play in communicating this in...

M. Hegarty M. A. Just

1987-01-01

288

Free-Body Diagrams: Necessary or Sufficient?  

Microsoft Academic Search

The Rutgers PAER group is working to help students develop various scientific abilities. One of the abilities is to create, understand and learn to use for qualitative reasoning and problem solving different representations of physical processes such as pictorial representations, motion diagrams, free-body diagrams, and energy bar charts. Physics education literature indicates that using multiple representations is beneficial for student

David Rosengrant; Alan van Heuvelen; Eugenia Etkina

2005-01-01

289

Phase diagram of a random tiling quasicrystal  

Microsoft Academic Search

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

Weixiong Li; Michael Widom

1992-01-01

290

On hardware description from block diagrams  

Microsoft Academic Search

In this paper, we present a systematic way to describe the logical architecture of the system implementing a given algorithm by means of an extended block diagram, and develop a standard notation to describe each block. We then show a technique for correctly transforming a block diagram into a physical circuit description by introducing the notion of time into the

H. Jagadish; T. Kailath; J. Newkirk; R. Mathews

1984-01-01

291

Towards IEC 61499 function blocks diagrams verification  

Microsoft Academic Search

After having sketched the different techniques enabling to check properties of discrete event systems control software, we present in this article a formal method for IEC 61499 function blocks diagrams verification. This method is based on a formal representation of the behaviour of function blocks diagrams and takes benefit of verification tools developed from the SIGNAL synchronous language.

C. Schnakenbourg; J.-M. Faure; J.-J. Lesage

2002-01-01

292

Compiling Data Flow Diagrams into Functional Programs  

Microsoft Academic Search

We suggest a method for compiling an arbitrary visual language V data flow diagrams with loops into a parallel functional language Sisal functions based on token propagation over the diagram and loop collapsing into a system of (mutually) recursive functions. This com- pilation algorithm preserves a concurrence potentially present in the data flow graph.

Mikhail Auguston; Ravindra Mathur

293

Block diagram modeling of quantum laser sources  

Microsoft Academic Search

The paper presents a method for modeling quantum laser sources. Quantum cascaded (QC), quantum dot (QD) and quantum dot cascaded (QDC) lasers are studied. Their block diagram models are devised. VisSim environment is used to achieve this purpose. Block diagram simulation results are validated against experimental published work and full agreements are obtained. Using of graphical user interface allows a

Imbaby I. Mahmoud

2010-01-01

294

Electron transport in molecular wires  

NASA Astrophysics Data System (ADS)

A molecular wire is defined to be a single molecule which is connected to metallic leads and acts as a conductor for electrons. It is a physically interesting system since it functions on a size scale where the quantum wave nature of the current carriers is important. Because of their size, molecular wires may also be of technological importance as future replacements for conventional solid-state devices. This thesis details theoretical work done on electron transport through molecular wires. The transport problem was studied by developing several methods based on Landauer theory which relates the electrical current to the transmission probability for a single electron to scatter through the molecule. Problems of current interest that were addressed include: current-voltage characteristics of 1,4 benzene-dithiolate bonded to gold electrodes, conductance characteristics of antiresonances in molecular wires, atomic orbital non-orthogonality, electron standing wave formation in atomic chains, inelastic electron scattering in molecular wires and a molecular wire transistor.

Emberly, Eldon Glenn

295

HTS Wire Development Workshop: Proceedings  

SciTech Connect

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.

Not Available

1994-07-01

296

1 mil gold bond wire study.  

SciTech Connect

In microcircuit fabrication, the diameter and length of a bond wire have been shown to both affect the current versus fusing time ratio of a bond wire as well as the gap length of the fused wire. This study investigated the impact of current level on the time-to-open and gap length of 1 mil by 60 mil gold bond wires. During the experiments, constant current was provided for a control set of bond wires for 250ms, 410ms and until the wire fused; non-destructively pull-tested wires for 250ms; and notched wires. The key findings were that as the current increases, the gap length increases and 73% of the bond wires will fuse at 1.8A, and 100% of the wires fuse at 1.9A within 60ms. Due to the limited scope of experiments and limited data analyzed, further investigation is encouraged to confirm these observations.

Huff, Johnathon; McLean, Michael B.; Jenkins, Mark W.; Rutherford, Brian Milne

2013-05-01

297

Free-Body Diagrams: Necessary or Sufficient?  

NSDL National Science Digital Library

The Rutgers PAER group is working to help students develop various scientific abilities. One of the abilities is to create, understand and learn to use for qualitative reasoning and problem solving different representations of physical processes such as pictorial representations, motion diagrams, free-body diagrams, and energy bar charts. Physics education literature indicates that using multiple representations is beneficial for student understanding of physics ideas and for problem solving. We developed a special approach to construct and utilize free-body diagrams for representing physical phenomena and for problem solving. We will examine whether students draw free-body diagrams in solving problems when they know they will not receive credit for it; the consistency of their use in different conceptual areas; and if students who use free-body diagrams while solving problems in different areas of physics are more successful then those who do not.

Rosengrant, David; Van Heuvelen, A.; Etkina, Eugenia

2009-11-30

298

Human life support during interplanetary travel and domicile. VI - Generic modular flow schematic for hybrid physical/chemical-biological life support systems  

NASA Technical Reports Server (NTRS)

An extension is proposed for the NASA Space Exploration Initiative's Generic Modular Flow Schematics for physical/chemical life support systems which involves the addition of biological processes. The new system architecture includes plant, microbial, and animal habitat, as well as the human habitat subsystem. Major Feedstock Production and Food Preparation and Packaging components have also been incorporated. Inedible plant, aquaculture, microbial, and animal solids are processed for recycling.

Ganapathi, Gani B.; Seshan, P. K.; Ferrall, Joseph; Rohatgi, Naresh

1992-01-01

299

Phase diagram of ammonium nitrate  

SciTech Connect

Ammonium Nitrate (AN) is a fertilizer, yet becomes an explosive upon a small addition of chemical impurities. The origin of enhanced chemical sensitivity in impure AN (or AN mixtures) is not well understood, posing significant safety issues in using AN even today. To remedy the situation, we have carried out an extensive study to investigate the phase stability of AN and its mixtures with hexane (ANFO–AN mixed with fuel oil) and Aluminum (Ammonal) at high pressures and temperatures, using diamond anvil cells (DAC) and micro-Raman spectroscopy. The results indicate that pure AN decomposes to N{sub 2}, N{sub 2}O, and H{sub 2}O at the onset of the melt, whereas the mixtures, ANFO and Ammonal, decompose at substantially lower temperatures. The present results also confirm the recently proposed phase IV-IV{sup ?} transition above 17 GPa and provide new constraints for the melting and phase diagram of AN to 40 GPa and 400°C.

Dunuwille, Mihindra; Yoo, Choong-Shik, E-mail: csyoo@wsu.edu [Department of Chemistry and Institute for Shock Physics, Washington State University, Pullman, Washington 99164 (United States)] [Department of Chemistry and Institute for Shock Physics, Washington State University, Pullman, Washington 99164 (United States)

2013-12-07

300

Coulomb interaction effects on the Majorana states in quantum wires  

NASA Astrophysics Data System (ADS)

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.

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

2014-04-01

301

Biological processes, properties and molecular wiring diagrams of candidate low-penetrance breast cancer susceptibility genes  

Microsoft Academic Search

BACKGROUND: Recent advances in whole-genome association studies (WGASs) for human cancer risk are beginning to provide the part lists of low-penetrance susceptibility genes. However, statistical analysis in these studies is complicated by the vast number of genetic variants examined and the weak effects observed, as a result of which constraints must be incorporated into the study design and analytical approach.

Núria Bonifaci; Antoni Berenguer; Javier Díez; Oscar Reina; Ignacio Medina; Joaquín Dopazo; Víctor Moreno; Miguel Angel Pujana

2008-01-01

302

Wire chambers revisited.  

PubMed

Detectors used for radioisotope imaging have, historically, been based on scintillating crystal/photomultiplier combinations in various forms. From the rectilinear scanner through to modern gamma cameras and positron cameras, the basic technology has remained much the same. Efforts to overcome the limitations of this form of technology have foundered on the inability to reproduce the required sensitivity, spatial resolution and sensitive area at acceptable cost. Multiwire proportional chambers (MWPCs) have long been used as position-sensitive charged particle detectors in nuclear and high-energy physics. MWPCs are large-area gas-filled ionisation chambers in which large arrays of fine wires are used to measure the position of ionisation produced in the gas by the passage of charged particles. The important properties of MWPCs are high-spatial-resolution, large-area, high-count-rate performance at low cost. For research applications, detectors several metres square have been built and small-area detectors have a charged particle resolution of 0.4 mm at a count rate of several million per second. Modification is required to MWPCs for nuclear medicine imaging. As gamma rays or X-rays cannot be detected directly, they must be converted into photo- or Compton scatter electrons. Photon-electron conversion requires the use of high atomic number materials in the body of the chamber. Pressurised xenon is the most useful form of "gas only" photon-electron convertor and has been used successfully in a gamma camera for the detection of gamma rays at energies below 100 keV. This camera has been developed specifically for high-count-rate first-pass cardiac imaging. This high-pressure xenon gas MWPC is the key to a highly competitive system which can outperform scintillator-based systems. The count rate performance is close to a million counts per second and the intrinsic spatial resolution is better than the best scintillator-based camera. The MWPC camera produces quantitative ejection fraction information of the highest quality. The detection of higher energy gamma rays has proved more problematical, needing a solid photon-electron convertor to be incorporated into the chamber. Several groups have been working on this problem with modest success so far. The only clinical detectors have been developed for positron emission tomography, where thin lead or lead-glass can provide an acceptable convertor for 511 keV photons. Two MWPC positron cameras have been evaluated clinically and one is now in routine use in clinical oncology. The problems of detection efficiency have not been solved by these detectors although reliability and large-area PET imaging have been proven.(ABSTRACT TRUNCATED AT 400 WORDS) PMID:8491229

Ott, R J

1993-04-01

303

Physics Classroom: Drawing Free-Body Diagrams  

NSDL National Science Digital Library

This tutorial explains how free body diagrams are used in solving problems involving Newton's Second Law. This tutorials demonstrates how to draw free body diagrams, what the diagram means to Physics, and includes practice problems for the student. This tutorial also includes other tutorials, animations, and student activities in other concepts of Physics. The Physics Classroom is a set of resources created for learners and teachers of high school physics. It includes comprehensive tutorials, problem sets with solutions, extra help for struggling students, Shockwave animations, multimedia learning modules, labs, and photo gallery.

Henderson, Tom

2011-10-03

304

Near threshold expansion of Feynman diagrams  

SciTech Connect

The near threshold expansion of Feynman diagrams is derived from their configuration space representation, by performing all x integrations. The general scalar Feynman diagram is considered, with an arbitrary number of external momenta, an arbitrary number of internal lines and an arbitrary number of loops, in n dimensions and all masses may be different. The expansions are considered both below and above threshold. Rules, giving real and imaginary part, are derived. Unitarity of a sunset diagram with I internal lines is checked in a direct way by showing that its imaginary part is equal to the phase space integral of I particles.

Mendels, E. [Schenkkade 221, The Hague, 2595 AT Den Haag (Netherlands)

2005-07-01

305

Plasma arc torch with coaxial wire feed  

DOEpatents

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.

Hooper, Frederick M (Albuquerque, NM)

2002-01-01

306

The Art of Free-Body Diagrams.  

ERIC Educational Resources Information Center

Discusses the difficulty of drawing free-body diagrams which only show forces exerted on a body from its neighbors. Presents three ways a body may be modeled: a particle, rigid extended, and nonrigid extended. (MKR)

Puri, Avinash

1996-01-01

307

A Smart Thermal Block Diagram Tool  

NASA Technical Reports Server (NTRS)

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.

Tsuyuki, Glenn; Miyake, Robert; Dodge, Kyle

2008-01-01

308

Sloan Digital Sky Survey - Hubble Diagram  

NSDL National Science Digital Library

This website, containing information from the Sloan Digital Sky Survey, provides projects and activities for advanced astronomy students. In this particular one, the user retraces Edwin Hubble's steps to discover that the Universe is expanding, by making a Hubble Diagram.

2010-01-07

309

EEBHub Building 101 Sankey Diagram Energy Analysis.  

National Technical Information Service (NTIS)

The Energy Efficient Buildings Hub (EEBHub) uses Sankey diagrams to visually analyze energy use in the building of its headquarters, Building 101 (B101). This report describes B101 energy consumption and passive energy exchanges with the surrounding envir...

A. J. Simon S. Singer

2013-01-01

310

An Improved Mnemonic Diagram for Thermodynamic Relationships.  

ERIC Educational Resources Information Center

Considers pressure, volume, entropy, temperature, Helmholtz free energy, Gibbs free energy, enthalpy, and internal energy. Suggests the mnemonic diagram is for use with simple systems that are defined as macroscopically homogeneous, isotropic, uncharged, and chemically inert. (MVL)

Rodriguez, Joaquin; Brainard, Alan J.

1989-01-01

311

Veitch diagram plotter simplifies Boolean functions  

NASA Technical Reports Server (NTRS)

This device for simplifying the plotting of a Veitch diagram consists of several overlays for blocking out the unwanted squares. This method of plotting the various input combinations to a computer is used in conjunction with the Boolean functions.

Rubin, D. K.

1964-01-01

312

Peculiarities of Wire Array Implosion  

SciTech Connect

The results of the experiments on Z-pinch produced from wire arrays performed on the facility Angara-5-1 are presented. The models of liner implosion, i.e. prolonged plasma production have found their confirmation. Estimation based on our experimental data show that W wire cores are heterogeneous. The velocity of core expansion is determined by energy deposited at the first nanoseconds after current start. The effect of the inner array on the current distribution in the region between the arrays has been revealed. The ?lost mass ? was measured at initial radius of array at the moment of X-ray pulse maximum.

Aleksandrov, V.V.; Volkov, G.S.; Grabovski, E.V.; Zaitsev, V.I.; Zukakishvili, G.G.; Medovschikov, S.F.; Mitrofanov, K.N.; Nedoseev, S.L.; Oleinik, G.M.; Porofeev, I.Yu.; Samokhin, A.A.; Smirnov, V.P.; Frolov, I.N.; Fedulov, M. V. [SRC RF TRINITI, Troitsk, Moscow Reg., 142190 (Russian Federation); Sasorov, P.V. [Institute of Theoretical and Experimental Physics, Moscow, 142190 (Russian Federation)

2006-01-05

313

Designing potentials by sculpturing wires  

SciTech Connect

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 microdesign 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 Bose-Einstein Condensate 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 one-dimensional magnetic lattice on an atom chip.

Della Pietra, Leonardo; Aigner, Simon; Groth, Soenke [Physikalisches Institut, Universitaet Heidelberg, 69120 Heidelberg (Germany); Hagen, Christoph von; Schmiedmayer, Joerg [Physikalisches Institut, Universitaet Heidelberg, 69120 Heidelberg (Germany); Atominstitut der Oesterreichischen Universitaeten, TU-Wien, A-1020 Vienna (Austria); Bar-Joseph, Israel [Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 7600 (Israel); Lezec, Henri J. [ISIS, Universite Louis Pasteur, 8 Allee Gaspard Monge, 67083 Strasbourg (France)

2007-06-15

314

The Voronoi Diagram of Three Lines  

Microsoft Academic Search

We give a complete description of the Voronoi diagram, in ?3, of three lines in general position, that is, that are pairwise skew and not all parallel to a common plane. In particular,\\u000a we show that the topology of the Voronoi diagram is invariant for three such lines. The trisector consists of four unbounded\\u000a branches of either a nonsingular quartic

Hazel Everett; Daniel Lazard; Sylvain Lazard

2009-01-01

315

Spectroscopic Determination of Ternary Phase Diagrams  

Microsoft Academic Search

Ternary phase diagrams describe phase equilibria among three components as a function of composition at constant temperature and pressure. The system of n-propanol, n-heptane, and water exhibits a simple ternary diagram with two well-demarcated regions. One region represents complete liquid miscibility at high proportions of n-propanol. The second region delineates the compositions where two immiscible liquid phases coexist--a water-rich layer

Kerry K. Karukstis; Sara K. Avrantinis; Stephanie L. Boegeman; Jeanie N. Conner; Blaine M. Hackman; Jennifer M. Lindsay; Alexander L. Mandel; Elizabeth J. Miller

2000-01-01

316

Generalized Local Voronoi Diagram of Visible Region  

Microsoft Academic Search

A circular robot in unknown environment, populated by non-overlapping obstacles is considered. The robot is equipped with a discrete scanner e.g. laser range scanner. We present a method for local construction of a one-dimensional structure, similar to the generalized Voronoi diagram. We call this structure a generalized local Voronoi diagram (GLVD). GLVD is constructed from scan points of the visible

Rajko Mahkovic; Tomaz Slivnik

1998-01-01

317

Algebraic decision diagrams and their applications  

Microsoft Academic Search

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,

R. Iris Bahar; Erica A. Frohm; Charles M. Gaona; Gary D. Hachtel; Enrico Macii; Abelardo Pardo; Fabio Somenzi

1993-01-01

318

Enhancing wire-composite bond strength of bonded retainers with wire surface treatment.  

PubMed

Bonded orthodontic retainers with wires embedded in composite resin are commonly used for orthodontic retention. The purpose of this study was to test, in vitro, various wire surface treatments to determine the optimal method of enhancing the wire-composite bond strength. Coaxial wires and stainless steel wires with different surface treatments were bonded to bovine enamel and then pulled along their long axes with an Instron universal testing machine. Wire surface treatments included placing a right-angle bend in the wire, microetching the wire, and treating the wire with adhesion promoters; combinations of treatments were also examined. The results demonstrated a 24-fold increase in the wire-composite bond strength of wire that was microetched (sandblasted), compared with that of untreated straight wire. The difference between the amount of force required to break the bond produced by microetching alone (246.1 +/- 46.0 MPa) and that required for the bonds produced by the retentive bend (87.8 +/- 16.3 MPa), the adhesion promoters (silane, 11.0 +/- 3.1 MPa; Metal Primer, 28.5 +/- 15.8 MPa), or for any combination of surface treatments, was statistically significant. Microetching a stainless steel wire produced a higher wire-composite bond strength than that obtained from a coaxial wire (113.5 +/- 27.5 MPa). The results of this study indicate that microetching or sandblasting a stainless steel wire significantly increases the strength of the wire-composite bond. PMID:11395707

Oesterle, L J; Shellhart, W C; Henderson, S

2001-06-01

319

Quantitative assessment of tension in wires of fine-wire external fixators.  

PubMed

Fine-wire fixators are widely used in fracture management. Stable fixation requires the wires maintaining tension throughout the treatment. Clinical experience indicates that wire site complications relate to wire tension. However, there lacks a method to assess wire tension quantitatively in the clinic. The objective of this study was to develop a quantitative assessment method for in situ wire tension and to investigate the factors that influence the assessment. An apparatus was developed based on a linear variable differential transformer (LVDT) displacement transducer that measured the deflection of the testing wire with respect to a parallel reference wire when a constant transverse force of 30N was applied to the testing wire. The wire deflection measured was correlated with the wire tension measured by the force transducer. The experiment was performed under different conditions to assess the effect of bone-clamp distance, reference wire tension, number of wires, and fracture stiffness. The results showed that there was a significant and negative correlation between wire tension and deflection and the bone-clamp distance was the most important factor that affected the wire tension-deflection relationship. The assessment method makes it possible to investigate the relationship between wire tension and wire site complications in the clinic. PMID:15604006

Dong, Yin; Saleh, Micheal; Yang, Lang

2005-01-01

320

New insulation constructions for aerospace wiring applications  

NASA Astrophysics Data System (ADS)

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.

Slenski, George

1994-09-01

321

New insulation constructions for aerospace wiring applications  

NASA Technical Reports Server (NTRS)

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.

Slenski, George

1994-01-01

322

Wire mesh isolator protects sensitive electronic components  

NASA Technical Reports Server (NTRS)

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.

Kerley, J. J., Jr.

1965-01-01

323

Printed Wiring Assembly and Interconnection Reliability.  

National Technical Information Service (NTIS)

This report presents reliability prediction models for printed wiring assemblies, solderless wrap assemblies, wrapped and soldered assemblies, and discrete wiring assemblies w/electroless deposited PTH for inclusion in MIL-HDBK-217. Collected field failur...

D. W. Coit

1981-01-01

324

Ultrasonic Aluminum Wire Bonding. Final Report.  

National Technical Information Service (NTIS)

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...

J. R. Sim

1980-01-01

325

30 CFR 56.12047 - Guy wires.  

Code of Federal Regulations, 2013 CFR

...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...

2013-07-01

326

30 CFR 57.12047 - Guy wires.  

Code of Federal Regulations, 2013 CFR

...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...

2013-07-01

327

Quality control of microelectronic wire bonds  

NASA Technical Reports Server (NTRS)

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.

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

1975-01-01

328

Electrical wire insulation and electromagnetic coil  

DOEpatents

An electromagnetic coil for high temperature and high radiation application in which glass is used to insulate the electrical wire. A process for applying the insulation to the wire is disclosed which results in improved insulation properties.

Bich, George J. (Penn Hills, PA); Gupta, Tapan K. (Monroeville, PA)

1984-01-01

329

Failure mechanisms in wire ropes  

Microsoft Academic Search

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

C. R. Chaplin

1995-01-01

330

Wire line soil sampler apparatus  

Microsoft Academic Search

A wire-line coring apparatus is described. The apparatus has a head assembly having a latch body with extendable latches for engaging the latch seat of a drill stem. A latch release member extends into the latch body to retract the latches. A fitting is mounted by the latch body. A locking ring axially movable on the fitting a limited amount

J. R. Cooper; W. W. Svendsen

1975-01-01

331

Fabrication of tungsten wire needles  

SciTech Connect

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.

Roder, A.

1983-02-01

332

Breakdown testing of wiring insulation  

NASA Technical Reports Server (NTRS)

The dielectric strength of potential wiring insulation, recommended by NASA Lewis Research Center to replace existing M81381 (polyimide), was evaluated at high temperature. Results, given in view-graph format, show that their is no dependence of breakdown strength on temperature for the constructions tested and that their was little effect of frequency on the breakdown characteristics.

Laghari, Javaid R.

1994-01-01

333

Light rail systems without wires?  

Microsoft Academic Search

For over 110 years, the use of overhead wires to power streetcars and more recently their successors, light rail vehicles, has been considered unsightly and undesirable by politicians and the general public alike. At the turn of the century many cities passed ordinances against them and many alternative power feed concepts were attempted, the most successful being the slot or

J. D. Swanson

2003-01-01

334

Flexible substrate for printed wiring  

NASA Technical Reports Server (NTRS)

A very flexible substrate for printed wiring is disclosed which is composed of a blend of phenoxy resin-polyisocyanate-brominated epoxy resin in which the equivalent ration of the functional groups is hydroxyl grouped: isocyanate group: epoxy group = 1:0.2 to 2:0.5 to 3. The product has outstanding solder resistance and is applied to metal without using adhesives.

Asakura, M.; Yabe, K.; Tanaka, H.; Soda, A.

1982-01-01

335

REACH. Residential Electrical Wiring Units.  

ERIC Educational Resources Information Center

As a part of the REACH (Refrigeration, Electro-Mechanical, Air-Conditioning, Heating) electromechanical cluster, this student manual contains individualized instructional units in the area of residential electrical wiring. The instructional units focus on grounded outlets, service entrance, and blueprint reading. Each unit follows a typical format…

Ansley, Jimmy; Ennis, Mike

336

Health care's 100 most wired.  

PubMed

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

Solovy, A; Serb, C

1999-02-01

337

Plated wire random access memories  

NASA Technical Reports Server (NTRS)

A program was conducted to construct 4096-work by 18-bit random access, NDRO-plated wire memory units. The memory units were subjected to comprehensive functional and environmental tests at the end-item level to verify comformance with the specified requirements. A technical description of the unit is given, along with acceptance test data sheets.

Gouldin, L. D.

1975-01-01

338

Troubleshooting plated-wire memories  

NASA Technical Reports Server (NTRS)

Faults in plated wire memories are identified and located from outside of system by applying electrical impulses and analyzing their reflectance in technique of Time-Domain Reflectometry (TDR). Intermittent faults are easier to find because memory system is not disturbed by probing or disassembly.

Baker, C. M.; Bright, T. M.; Constable, R. C.

1979-01-01

339

Method of Producing Fine Wire.  

National Technical Information Service (NTIS)

Invention consists of a method of obtaining thin wire, for Ex., of the diameter of 0.001 mm, by drawing a bimetallic billet with subsequent scouring of the outer surface which is distinguished by the fact that for the purpose of getting a constant section...

L. A. Lysenko N. S. Agushevich

1964-01-01

340

Shape-Memory Wires Switch Rotary Actuator  

NASA Technical Reports Server (NTRS)

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.

Brudnicki, Myron J.

1992-01-01

341

Force on a Current Carrying Wire  

NSDL National Science Digital Library

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.

VU Bioengineering RET Program, School of Engineering,

342

Study of Holding Power of Wire Rope Clips in a Wire Rope Loop.  

National Technical Information Service (NTIS)

This report presents the results of tests performed on 3/8, 1/2, and 5/8 inch independent wire rope core (IWRC) wire rope, and 3/8, 1/2, and 5/8 inch fiber core wire rope. The test samples consisted of end-over-end wire rope loops held together with vario...

E. Jackson D. Skoneczka

1978-01-01

343

Gold nanoparticle wire and integrated wire array for electronic detection of chemical and biological molecules  

Microsoft Academic Search

Nanoparticle wire and integrated nanoparticle wire array have been prepared through a green technique: discontinuous vertical evaporation-driven colloidal deposition. The conducting gold nanoparticle wire made by this technique shows ability for the sensitive electronic detection of chemical and biological molecules due to its high surface to volume ratio. Furthermore, we also demonstrate a potential usage of integrated gold nanoparticle wire

J. J. Diao; Qing Cao

2011-01-01

344

Rupture failure and mechanical strength of the electrode wire used in wire EDM  

Microsoft Academic Search

In the application of wire EDM, wire rupture is very troublesome and impedes further increase of cutting speed. Instead of the spark characteristics or the temperature distribution, the rupture mechanism and the mechanical strength of the wire are the focus of this investigation. Wire rupture is a mechanical failure in essence, although the process heat has significant influence on the

Y. F. Luo

1999-01-01

345

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

Microsoft Academic Search

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

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

2011-01-01

346

Fluxgate effect in twisted magnetic wire  

Microsoft Academic Search

In this paper a novel kind of fluxgate is presented. The sensor is based on helical anisotropy of the ferromagnetic layer, electrodeposited on copper wire. The saturating field is provided by current flowing in the wire, and the output voltage is measured directly at the terminations of the wire. Therefore no coils are necessary, making possible high miniaturization of the

M. Butta; P. Ripka; S. Atalay; F. E. Atalay; X. P. Li

2008-01-01

347

[Super-elastic wire used in orthodontics].  

PubMed

The Authors describe the unusual super-elastic property of the Japanese NiTi alloy wire. They examine the clinical applications in relation to the relatively constant force delivered during the deactivation and in relation to the new possibility to shape wire which are offered by the Archmate Wire Bender. PMID:2074888

Laino, A; Boscaino, F; Michelotti, A

1990-01-01

348

49 CFR 234.231 - Fouling wires.  

Code of Federal Regulations, 2010 CFR

...234.231 Fouling wires. Each set of fouling wires in a highway-rail grade crossing train detection circuit shall consist...apparatus when the train detection circuit is shunted...Installation of a single duplex wire with single plug...

2009-10-01

349

GRYFFIN TALOS taut wire perimeter detection system  

Microsoft Academic Search

Perimeter security utilising a taut wire fence sensor system has been available for the last 30 years. There are a number of features which make such systems attractive for security applications. These include resistance to environmental affects, low nuisance alarm rate and high probability of detection. A taut wire fence constructed of barbed wire also acts as a deterrent, adding

G. Hellard

1998-01-01

350

Trip wire detection using polarimetric IR  

Microsoft Academic Search

In this paper we present a method for passive stand off detection of trip wires. The concept described has the ability to detect trip wires camouflaged in a wide variety of natural backgrounds. The system includes an IR camera using the 3-5 micron band and a polarizing filter. A simple software algorithm is used to dewarp the trip wire in

Jesper Storm; Tommy Geisler

2000-01-01

351

Wire detection using single-slit diffraction  

Microsoft Academic Search

This paper presents a wire detection method using single-slit diffraction. A laser head generates the light beam, and an optical slit is introduced in the path of light source to a wire, so that diffraction pattern generated by the slit will be projected to the receiving screen, and irradiance loss could be observed, due to the presence of a wire.

Yong Xiao; Kuanyi Zhu; Chi Zhang

2011-01-01

352

49 CFR 234.231 - Fouling wires.  

Code of Federal Regulations, 2010 CFR

...234.231 Fouling wires. Each set of fouling wires in a highway-rail grade crossing train detection circuit shall consist...apparatus when the train detection circuit is shunted...Installation of a single duplex wire with single plug...

2010-10-01

353

Guided Waves in Uniaxial Wire Medium Slab.  

National Technical Information Service (NTIS)

Guided waves in a wire medium slab are studied. The wire medium is considered as a continuous medium described in terms of uniaxial permittivity dyadic. Nonlocal model of the wire medium, taken into account spatial dispersion, is used in our analysis. Dif...

2003-01-01

354

Braided cerclage wires: A biomechanical study  

Microsoft Academic Search

BackgroundOne of the drawbacks that makes many surgeons reluctant to use cerclage wires is the risk of periosteal vascular compromise. A new, easily applied braided wire configuration has been developed to improve mechanical wire gripping and to decrease the contact area between the hardware and the bony surface.

Ely L. Steinberg; Ronen Shavit

2011-01-01

355

'Most wired' hospitals widen gap over others.  

PubMed

More than 90% of most wired conduct return-on-investment analyses to justify expenditures. Computerized physician order entry is 10 times more likely to be used at most wired organizations than at least wired facilities. Information technology education of staff takes high priority at hospitals ranking high in survey. PMID:15537068

2004-10-01

356

Last Progress in Underwater Electrical Wire Explosion  

Microsoft Academic Search

The results of the investigation of the underwater electrical wire explosions using a high power nanosecond timescale generator are reported. The spectroscopic analysis of the emitted radiation has unveiled no evidence for the formation of shunting plasma channel. The latter appears in vacuum and gas wire explosions and causes to the seizure of energy deposition into an exploding wire material.

Alon Grinenko; Arkady Sayapin; Sergey Efimov; Alexander Fedotov; Yakov E. Krasik

2008-01-01

357

Wire sweep during molding of integrated circuits  

Microsoft Academic Search

The conditions that lead to wire sweep during transfer molding of plastic packages are examined. The parameters investigated include the material flow properties, the mold cavity\\/leadframe aspect ratio, the wire modulus, and the wire bond configuration (e.g. diameter, length, and orientation). Flow visualization with a clear silicone fluid and actual molding with an epoxy compound were carried out in order

L. T. Nguyen; F. J. Lim

1990-01-01

358

Integrated taut wire sensor alarm monitoring system  

Microsoft Academic Search

For many years mechanical taut wire intrusion detection systems have played a key role in protecting high risk facilities. The taut wire sensor has the advantage that it combines a physical barrier with an intrusion sensor, a useful feature where no fence is installed or planned. However, mechanical taut wire sensors have proven to have several major disadvantages, including: no

J. B. Morgan; M. R. Tennefoss

1986-01-01

359

MODELLING CORED WIRE INJECTION IN STEEL MELTS  

Microsoft Academic Search

Cored wire injection is an essential feature of liquid steel processing. An estimation of the time for melting of the wire sheath (casing) and the subsequent release of the filling material cannot be done without resorting to an elaborate mathematical model due to the complexity of the heat transfer from the bath to the wire. In particular, the formation of

Sarbendu Sanyal; Sanjay Chandra; Amreekh Singh; G G Roy

360

Magnetic Force on a Current-carrying Wire  

NSDL National Science Digital Library

This is an inquiry-based lab for AP or Honors high school physics, designed to let students explore the effect of an external field on a current-carrying wire in that field. Detailed background information and tips for teachers accompany the lesson, along with photos and diagrams of the lab set-up. It is expected that students would have some prior experience with the fundamentals of magnetism but would not have studied the topic prior to the lab. This resource is part of a larger collection of inquiry-based labs developed by the NSF-funded Center for Nanoscale Systems Institute for Physics Teachers. SEE RELATED ITEMS on this page for a link to the full collection.

2007-07-30

361

Wiring Viterbi decoders (splitting deBruijn graphs)  

NASA Technical Reports Server (NTRS)

A new Viterbi decoder, capable of decoding convolutional codes with constraint lengths up to 15, is under development for the Deep Space Network (DSN). A key feature of this decoder is a two-level partitioning of the Viterbi state diagram into identical subgraphs. The larger subgraphs correspond to circuit boards, while the smaller subgraphs correspond to Very Large Scale Integration (VLSI) chips. The full decoder is built from identical boards, which in turn are built from identical chips. The resulting system is modular and hierarchical. The decoder is easy to implement, test, and repair because it uses a single VLSI chip design and a single board design. The partitioning is completely general in the sense that an appropriate number of boards or chips may be wired together to implement a Viterbi decoder of any size greater than or equal to the size of the module.

Collins, O.; Pollara, F.; Dolinar, S.; Statman, J.

1989-01-01

362

Dynamic tactile diagram simplification on refreshable displays.  

PubMed

The increasing use of visual diagrams in educational and work environments, and even our daily lives, has created obstacles for individuals who are blind or visually impaired to independently access the information they represent. Although physical tactile pictures can be created to convey the visual information, it is typically a slow, cumbersome, and costly process. Refreshable haptic displays, which interact with computers, promise to make this access quicker, easier, and cheaper. One important aspect in converting visual to tactile diagrams is to simplify the diagram as otherwise it can be too difficult to interpret with touch. Enabling this to be under user control in an interactive environment, such as with refreshable displays, could allow users to avoid being overwhelmed by the diagrams at any instant in time while still retaining access to all information in "storage". Through this article the authors investigate whether two types of diagram simplification--boundary simplification and contextual simplification--showed potential utility in an interactive environment. Boundary simplification was found to be significantly helpful in answering general questions about borders on a geographic map, and contextual simplification was helpful in answering relational questions, as compared to using the original map unchanged. PMID:23527429

Rastogi, Ravi; Pawluk, Dianne T V

2013-01-01

363

On phase diagrams of magnetic reconnection  

SciTech Connect

Recently, “phase diagrams” of magnetic reconnection were developed to graphically organize the present knowledge of what type, or phase, of reconnection is dominant in systems with given characteristic plasma parameters. Here, a number of considerations that require caution in using the diagrams are pointed out. First, two known properties of reconnection are omitted from the diagrams: the history dependence of reconnection and the absence of reconnection for small Lundquist number. Second, the phase diagrams mask a number of features. For one, the predicted transition to Hall reconnection should be thought of as an upper bound on the Lundquist number, and it may happen for considerably smaller values. Second, reconnection is never “slow,” it is always “fast” in the sense that the normalized reconnection rate is always at least 0.01. This has important implications for reconnection onset models. Finally, the definition of the relevant Lundquist number is nuanced and may differ greatly from the value based on characteristic scales. These considerations are important for applications of the phase diagrams. This is demonstrated by example for solar flares, where it is argued that it is unlikely that collisional reconnection can occur in the corona.

Cassak, P. A. [Department of Physics, West Virginia University, Morgantown, West Virginia 26506 (United States)] [Department of Physics, West Virginia University, Morgantown, West Virginia 26506 (United States); Drake, J. F. [IREAP, University of Maryland, College Park, Maryland 20742-3511 (United States)] [IREAP, University of Maryland, College Park, Maryland 20742-3511 (United States)

2013-06-15

364

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false System diagram map. 1152.10 Section 1152.10 Transportation...Diagram § 1152.10 System diagram map. (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...

2013-10-01

365

Block diagram generation and parsing based on graph grammar  

Microsoft Academic Search

A block diagram is a graphical model with which it is possible to concisely visualize a system structure and is widely used in control engineering and other fields. However, there are few studies that try to formulate a syntax of block diagrams. In this research, we define a block diagram grammar which generates block diagrams by means of subgraph rewriting

Koushi Anzai; Yoshihiro Adachi; Suguru Kobayashi; Kensei Tsuchida

1997-01-01

366

Fishbone Diagrams: Organize Reading Content with a "Bare Bones" Strategy  

ERIC Educational Resources Information Center

Fishbone diagrams, also known as Ishikawa diagrams or cause-and-effect diagrams, are one of the many problem-solving tools created by Dr. Kaoru Ishikawa, a University of Tokyo professor. Part of the brilliance of Ishikawa's idea resides in the simplicity and practicality of the diagram's basic model--a fish's skeleton. This article describes how…

Clary, Renee; Wandersee, James

2010-01-01

367

Transformation from Data Flow Diagram to UML2.0 activity diagram  

Microsoft Academic Search

Model transformations are frequently applied in business process modeling to bridge between languages on a different level of abstraction and formality This paper proposes a model transformation from Data Flow Diagrams (DFD) which have been used widely in structure requirement analysis phase to UML Activity Diagrams (UML-AD) which have been used widely in various phases of Object Oriented Development Method.

Fanchao Meng; Dianhui Chu; Dechen Zhan

2010-01-01

368

Frequency response in short thermocouple wires  

NASA Technical Reports Server (NTRS)

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.

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

1992-01-01

369

Wire rope and method of making same  

SciTech Connect

A wire rope, particularly a non-twistable wire rope, wherein an annulus of outer strands surrounds a wire rope center with a central strand and one or more annuli of neighboring strands surrounding the central strand. The wires of the strands in the center do not intersect each other. The entire center or at least some of its strands are densified prior to or during application of the outer strands. Alternatively, or in addition to such densification, at least some strands of the center are assembled of wires having an other than circular outline to thereby reduce the combined cross-sectional area of voids in the center.

Verreet, R.

1984-06-19

370

Investigating seawater intrusion due to groundwater pumping with schematic model simulations: The example of the Dar es Salaam coastal aquifer in Tanzania  

NASA Astrophysics Data System (ADS)

Water supply requirements in Dar es Salaam city (Tanzania) are rising rapidly by population growth and groundwater is increasingly used to fullfill the needs. The groundwater is taken from the Dar es Salaam Quaternary coastal aquifer (DQCA), stretching inland from the coastline. As thousands of wells have been drilled in the coastal strip and pumping rates are uncontrolled, seawater intrusion is deteriorating the quality of fresh groundwater. To investigate the response of the fresh/salt water interface to coastal pumping, simulations with a schematic two-dimensional cross-sectional model have been done. Depending on the depth of the wells in the 150 m thick DQCA and their distance from the coastline, different pathways of seawater intrusion and shifts of the interface can be recognized. The local presence of a semi-pervious layer can have a significant impact on the fresh/salt water distribution. Although the modeled section is not related to a specific location along the coastline but rather represents an average aquifer buildup, the results of the simulations can be used to formulate recommendations when drilling new wells and for a better monitoring of the salinisation process along the coast. It proves that even simple schematic models can give meaningful contributions.

Van Camp, Marc; Mtoni, Yohana; Mjemah, Ibrahimu C.; Bakundukize, Charles; Walraevens, Kristine

2014-08-01

371

An algebra approach to the deduction of data flow diagrams and object oriented diagrams from a set of specifications  

Microsoft Academic Search

The Software Engineering processes usually lack formal mathematical foundations. This paper presents a formal approach for the development of Specifications, Data Flow Diagrams and Object Oriented Diagrams using algebraic theory. The use of algebraic theory allows the check for completeness and consistency and the generation of automatic procedures for translating specifications into Data Flow Diagrams or Object Oriented Diagrams.

Federico Vazquez

1995-01-01

372

An algebra approach to the deduction of data flow diagrams and object oriented diagrams from algebraic specifications  

Microsoft Academic Search

The Software Engineering procedures usually lack formal mathematical foundations. This paper presents a formal approach for the development of Specifications, Data Flow Diagrams and Object Oriented Diagrams using algebraic theory. The use of algebraic theory allows the check for completeness and consistency and the generation of automatic procedures for translating specifications into Data Flow Diagrams or Object Oriented Diagrams.

Federico Vazquez

1996-01-01

373

Plasma formation in metallic wire Z pinches  

SciTech Connect

Plasma formation in metallic wire Z pinches is modeled using a two-dimensional resistive magnetohydrodynamics code. Modified Thomas-Fermi equations of state and dense plasma transport coefficients allow the phase transitions from solid to plasma to be approximated. Results indicate the persistence of a two-component structure with a cold, dense core embedded within a much hotter, low density, m=0 unstable corona. Extensive benchmark testing against data from a number of single-wire experiments is presented. Artificial laser schlieren and x-ray back-lighting images generated from the code data are compared directly to experimental results. The results were found to be insensitive to inaccuracies in the equations of state and transport coefficients. Simulations of individual wires in a wire array show different behavior to that observed experimentally due to the absence of three-dimensional effects. Simulations with similar conditions to wires in an array show a general trend in the plasma structure at start of implosion from discrete wires with large m=0 perturbation amplitudes to partially merged wires with smaller perturbation amplitudes as the number of wires is increased. Results for a wire number scan with aluminum wire arrays on the SATURN generator suggest that the observed sharp transition to high x-ray power at around 40 wires corresponds to a sharp decrease in m=0 perturbation amplitude and hence a sharp decrease in the seed perturbation for the Rayleigh-Taylor instability. (c) 2000 The American Physical Society.

Chittenden, J. P. [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom)] [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom); Lebedev, S. V. [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom)] [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom); Ruiz-Camacho, J. [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom)] [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom); Beg, F. N. [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom)] [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom); Bland, S. N. [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom)] [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom); Jennings, C. A. [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom)] [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom); Bell, A. R. [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom)] [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom); Haines, M. G. [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom)] [Blackett Laboratory, Imperial College, London SW7 2BZ, (United Kingdom); Pikuz, S. A. [P. N. Lebedev Physical Institute, Moscow 121433, Russia (Russian Federation)] [P. N. Lebedev Physical Institute, Moscow 121433, Russia (Russian Federation); Shelkovenko, T. A. [P. N. Lebedev Physical Institute, Moscow 121433, Russia (Russian Federation)] [P. N. Lebedev Physical Institute, Moscow 121433, Russia (Russian Federation)

2000-04-01

374

A pseudo-haptic knot diagram interface  

NASA Astrophysics Data System (ADS)

To make progress in understanding knot theory, we will need to interact with the projected representations of mathematical knots which are of course continuous in 3D but significantly interrupted in the projective images. One way to achieve such a goal would be to design an interactive system that allows us to sketch 2D 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 to be made in this direction. Pseudo-haptics that simulates haptic effects using pure visual feedback can be used to develop such an interactive system. This paper outlines one such pseudo-haptic knot diagram interface. Our interface derives from the familiar pencil-and-paper process of drawing 2D 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 pseudo-haptics 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 whom the projective image is being explored. By exploiting these additional visual cues, we proceed to a full-featured extension to a pseudo-haptic 4D visualization system that simulates the continuous navigation on 4D 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 2D knot diagrams of 3D knots and 3D projective images of 4D mathematical objects.

Zhang, Hui; Weng, Jianguang; Hanson, Andrew J.

2011-01-01

375

Composite wire plasma formation and evolution  

SciTech Connect

The detailed understanding of the formation and evolution of plasma from rapidly heated metallic wires is a long-standing challenge in the field of plasma physics and in exploding wire engineering. This physical process is made even more complicated if the wire material is composed of a number of individual layers. The authors have successfully developed both optical and x-ray backlighting diagnostics. In particular, the x-ray backlighting technique has demonstrated the capability for quantitative determination of the plasma density over a wide range of densities. This diagnostic capability shows that the process of plasma formation is composed of two separate phases: first, current is passed through a cold wire and the wire is heated ohmically, and, second, the heated wire evolves gases that break down and forms a low-density plasma surrounding the wire.

Spielman, R.B.

2000-01-01

376

High speed aluminum wire anodizing and process  

SciTech Connect

A high speed aluminum wire anodizing machine and process are provided which includes anodizing aluminum wire in an anodizer tank having wire ingress and egress openings. At least two adjacent rotatable wire accumulator drums are provided in the tank, preferably with means for producing a flow of anodizing electrolytes into each of the drums through an end hub thereof and out of the sidewalls of the drums passed circumferential wire separators. An anode is located proximal to the wire ingress opening, preferably in a contact cell which has an adjustable wire egress window. At least one cathode is provided in the tank. The cathode is preferably either between the drums or a pair of cathodes are provided above and below the drums adjacent to the sidewalls thereof, or both.

Carr, D.

1984-09-11

377

Wire Crimp Connectors Verification using Ultrasonic Inspection  

NASA Technical Reports Server (NTRS)

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.

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

2007-01-01

378

NASA wiring for space applications program  

NASA Technical Reports Server (NTRS)

An overview of the NASA Wiring for Space Applications Program and its relationship to NASA's space technology enterprise is given in viewgraph format. The mission of the space technology enterprise is to pioneer, with industry, the development and use of space technology to secure national economic competitiveness, promote industrial growth, and to support space missions. The objectives of the NASA Wiring for Space Applications Program is to improve the safety, performance, and reliability of wiring systems for space applications and to develop improved wiring technologies for NASA flight programs and commercial applications. Wiring system failures in space and commercial applications have shown the need for arc track resistant wiring constructions. A matrix of tests performed versus wiring constructions is presented. Preliminary data indicate the performance of the Tensolite and Filotex hybrid constructions are the best of the various candidates.

Schulze, Norman

1995-01-01

379

Preparation of uncladded YBCO wires  

NASA Astrophysics Data System (ADS)

Wires of YBCO, 1-5 mm in diameter, have been obtained by extrusion of an oxalate derived powder mixed with polyvinyl butyral (PVB) and two phthalate plasticizers. The densification and transport properties of the wires were investigated at various organic loading conditions. For YBCO powder prepared by oxalate coprecipitation and calcined at 930°C, the maximal strength, relative density and Jc were 20MPa, 92% and 400A/cm 2, respectively. Results show that after a 4-hour sintering at 955°C the tensile strength, density, and Jc are all maximized at a binder content of 3-4 wt.%. The loading of up to 10 wt.% dibutyl phthalate (DBP) plasticizer (in the binder) has little effect on the properties. Beyond this loading a drastic drop in Jc is observed. The densification was very poor for sinterings below 950°C, which was reflected by a lower critical current.

Grader, G.; Cadoche, L.; Shter, G.

1993-04-01

380

B-Fe-U Phase Diagram  

NASA Astrophysics Data System (ADS)

The liquidus projection of the U-rich corner of the B-Fe-U phase diagram is proposed based on X-ray powder diffraction measurements, differential thermal analysis, and scanning electron microscopy observations complemented with energy- and wavelength-dispersive X-ray spectroscopies. Two ternary reactions in this U-rich region were observed and their approximate temperatures were established. In addition, an overview of the complete phase diagram is given, including the liquidus projection; isothermal sections at 1053 K, 1223 K, and 1373 K (780 °C, 950 °C, and 1100 °C); and a U:(Fe,B) = 1:5 isopleth.

Dias, Marta; Carvalho, Patrícia Almeida; Mardolcar, Umesh Vinaica; Tougait, Olivier; Noël, Henri; Gonçalves, António Pereira

2014-04-01

381

Period Analyses Without O-C Diagrams  

NASA Astrophysics Data System (ADS)

We present a versatile method appropriate for the period analyses of observations containing phase information of all kinds of periodic or nearly periodic variable stars on the basis of phenomenological modelling of their phase curves and phase functions. The approach is based on rigorous application of a non-linear weighted least-squares method exploiting all available observational data and does not need an O-C diagram as an intermediate stage for period analyses. However, this approach enables us to determine precise times of extrema of light curves, to calculate ephemerides and construct plausible O-C diagrams. We substantiate the general applicability of the method on eclipsing binaries research.

Mikulášek, Zden?k; Zejda, Miloslav; Janík, Jan

2012-04-01

382

Minkowski diagram in relativity and holography.  

PubMed

Now that ultrashort laser pulses can be used in holography, the temporal and spatial resolution approach the same order of magnitude. In that case the limited speed of light sometimes causes large measuring errors if correction methods are not introduced. Therefore, we want to revive the Minkowski diagram, which was invented in 1908 to visualize relativistic relations between time and space. We show how this diagram in a modified form can be used to derive both the static holodiagram, used for conventional holography, including ultrahigh-speed recordings of wavefronts, and a dynamic holodiagram used for studying the apparent distortions of objects recorded at relativistic speeds. PMID:20531662

Abramson, N

1988-05-01

383

Asymmetric Wings of the Butterfly Diagram  

NASA Astrophysics Data System (ADS)

We analyze hemispheric asymmetry in the sunspot distribution over a solar cycle. Butterfly diagrams as plots of the latitudes of emerging sunspots against time are studied in order to find similarities and differences between Northern and Southern hemispheres. Long-term anticorrelations between time lags in hemispheric leading and "magnetic equator" shifts are found. The secular variability of the North-South asynchrony on the order of 90 years is identified. The asymmetry of butterfly diagrams just before and during the Global Minimums is discussed.

Zolotova, N. V.; Ponyavin, D. I.

2008-09-01

384

Reduced-Wiring Tactile Sensor  

NASA Technical Reports Server (NTRS)

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.

Ohm, Timothy R.

1991-01-01

385

Pin Wire Coating Trip Report  

SciTech Connect

A meeting to discuss the current pin wire coating problems was held at the Reynolds plant in Los Angeles on 2MAR04. The attendance list for Reynolds personnel is attached. there was an initial presentation which gave a brief history and the current status of pin wire coating at Reynolds. There was a presentation by Lori Primus on the requirements and issues for the coating. There was a presentation by Jim Smith of LANL on the chemistry and to some extent process development done to date. There was a long session covering what steps should be taken in the short term and, to a lesser extent, the long term. The coating currently being used is a blend of two polymers, polyethersulfone and polyparabanic acid (PPA) and some TiO2 filler. This system was accepted and put into production when the pin wire coating was outsourced to another company in 1974. When that company no longer was interested, the wire coating was brought in-house to Reynolds. At that time polyparabanic acid was actually a commercial product available from Exxon under the trade name Tradlon. However, it appears that the material used at Reynolds was synthesized locally. Also, it appears that a single large batch was synthesized in that time period and used up to 1997 when the supply ran out. The reason for the inclusion of TiO2 is not known although it does act as a rheological thickener. However, a more controlled thickening can be obtained with materials such as fumed silica. This material would have less likelihood of causing point imperfections in the coatings. Also, the mixing technique being used for all stages of the process is a relatively low shear ball mill process and the author recommends a high shear process such as a three roll paint mill, at least for the final mixing. Since solvent is added to the powder at Reynolds, it may be that they need to have the paint mill there.

Spellman, G P

2004-03-18

386

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

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

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

2011-01-01

387

Optical-electrical wiring board, mounted board and method of manufacturing optical-electrical wiring board  

US Patent & Trademark Office Database

Disclosed is an optical-electrical wiring board, comprising an electrical wiring board having a through-hole formed therein and an optical wiring layer laminated on the board and including a core and a clad surrounding the core. The electrical wiring board includes an electrical wiring formed on one surface of the board and pads on which optical parts are mounted. The pads are electrically connected to the electrical wiring and arranged on one surface of the electrical wiring board in the vicinity of a through-hole. The core includes a horizontal waveguide for propagating the light beam in a horizontal direction along the electrical wiring board and a vertical waveguide having a part arranged inside the through-hole and crossing the horizontal waveguide. The vertical waveguide propagates the light beam in a direction perpendicular to the electrical wiring board.

2004-10-12

388

Study flow diagrams in Cochrane systematic review updates: an adapted PRISMA flow diagram  

PubMed Central

Cochrane systematic reviews are conducted and reported according to rigorous standards. A study flow diagram must be included in a new review, and there is clear guidance from the PRISMA statement on how to do this. However, for a review update, there is currently no guidance on how study flow diagrams should be presented. To address this, a working group was formed to find a solution and produce guidance on how to use these diagrams in review updates. A number of different options were devised for how these flow diagrams could be used in review updates, and also in cases where multiple searches for a review or review update have been conducted. These options were circulated to the Cochrane information specialist community for consultation and feedback. Following the consultation period, the working group refined the guidance and made the recommendation that for review updates an adapted PRISMA flow diagram should be used, which includes an additional box with the number of previously included studies feeding into the total. Where multiple searches have been conducted, the results should be added together and treated as one set of results. There is no existing guidance for using study flow diagrams in review updates. Our adapted diagram is a simple and pragmatic solution for showing the flow of studies in review updates.

2014-01-01

389

Study flow diagrams in Cochrane systematic review updates: an adapted PRISMA flow diagram.  

PubMed

Cochrane systematic reviews are conducted and reported according to rigorous standards. A study flow diagram must be included in a new review, and there is clear guidance from the PRISMA statement on how to do this. However, for a review update, there is currently no guidance on how study flow diagrams should be presented. To address this, a working group was formed to find a solution and produce guidance on how to use these diagrams in review updates.A number of different options were devised for how these flow diagrams could be used in review updates, and also in cases where multiple searches for a review or review update have been conducted. These options were circulated to the Cochrane information specialist community for consultation and feedback. Following the consultation period, the working group refined the guidance and made the recommendation that for review updates an adapted PRISMA flow diagram should be used, which includes an additional box with the number of previously included studies feeding into the total. Where multiple searches have been conducted, the results should be added together and treated as one set of results.There is no existing guidance for using study flow diagrams in review updates. Our adapted diagram is a simple and pragmatic solution for showing the flow of studies in review updates. PMID:24886533

Stovold, Elizabeth; Beecher, Deirdre; Foxlee, Ruth; Noel-Storr, Anna

2014-01-01

390

Computer-Generated Diagrams for the Classroom.  

ERIC Educational Resources Information Center

Describes 10 computer programs used to draw diagrams usually drawn on chalkboards, such as addition of three vectors, vector components, range of a projectile, lissajous figures, beats, isotherms, Snell's law, waves passing through a lens, magnetic field due to Helmholtz coils, and three curves. Several programming tips are included. (JN)

Carle, Mark A.; Greenslade, Thomas B., Jr.

1986-01-01

391

Segmenting dot patterns by voronoi diagram concavity.  

PubMed

This correspondence defines a signed distance, called ``internal concavity,'' on paths of the Voronoi diagram of a dot pattern. An algorithm using internal concavity to segment dot patterns is described. The segmentation algorithm produces subsets of the Dirichlet tessellation (Delaunay triangulation) of the dot pattern. PMID:21869092

Fairfield, J

1983-01-01

392

Construction of Lax operators from weight diagrams  

SciTech Connect

We show that cyclic weight diagrams corresponding to representations of affine Lie algebras allow one to read-off the associated Lax operator. The resultant Lax pair generates the modified KdV equations, and have been shown in some cases to produce acceptable solutions of the string equation of matrix models.

Carbon, S.L.; Piard, E.J.

1991-05-01

393

A pseudo-haptic knot diagram interface  

Microsoft Academic Search

To make progress in understanding knot theory, we will need to interact with the projected representations of mathematical knots which are of course continuous in 3D but significantly interrupted in the projective images. One way to achieve such a goal would be to design an interactive system that allows us to sketch 2D knot diagrams by taking advantage of a

Hui Zhang; Jianguang Weng; Andrew J. Hanson

2011-01-01

394

Complexities of One-Component Phase Diagrams  

ERIC Educational Resources Information Center

For most materials, the solid at and near the triple-point temperature is denser than the liquid with which it is in equilibrium. However, for water and certain other materials, the densities of the phases are reversed, with the solid being less dense. The profound consequences for the appearance of the "pVT" diagram of one-component materials…

Ciccioli, Andrea; Glasser, Leslie

2011-01-01

395

The Binary Temperature-Composition Phase Diagram  

ERIC Educational Resources Information Center

The equations for the liquid and gas lines in the binary temperature-composition phase diagram are derived by approximating that delta(H)[subscript vap] of the two liquids are equal. It is shown that within this approximation, the resulting equations are not too difficult to present in an undergraduate physical chemistry lecture.

Sanders, Philip C.; Reeves, James H.; Messina, Michael

2006-01-01

396

Dynamic Tactile Diagram Simplification on Refreshable Displays  

Microsoft Academic Search

The increasing use of visual diagrams in educational and work environments, and even our daily lives, has created obstacles for individuals who are blind or visually impaired to independently access the information they represent. Although physical tactile pictures can be created to convey the visual information, it is typically a slow, cumbersome and costly process. Refreshable haptic displays, which interact

Ravi Rastogi; Dianne T. V Pawluk

2012-01-01

397

Shockwave Physics Studios: Free Body Diagrams  

NSDL National Science Digital Library

This interactive activity, part of The Physics Classroom tutorial collection, provides self-directed practice in constructing free-body diagrams. Twelve descriptions of physical situations are presented; the goal is to determine the type and relative magnitude of the forces acting upon the described object. Additional help is provided with one click on "Web Help".

Henderson, Tom

2011-09-27

398

Fog Machines, Vapors, and Phase Diagrams  

ERIC Educational Resources Information Center

A series of demonstrations is described that elucidate the operation of commercial fog machines by using common laboratory equipment and supplies. The formation of fogs, or "mixing clouds", is discussed in terms of the phase diagram for water and other chemical principles. The demonstrations can be adapted for presentation suitable for elementary…

Vitz, Ed

2008-01-01

399

The Starfish Diagram: Statistical visualization tool  

NASA Astrophysics Data System (ADS)

The Starfish Diagram is a statistical visualization tool that simultaneously displays the properties of an individual and its parent sample through a series of histograms. The code is useful for large datasets for which one needs to understand the standing or significance of a single entry.

Konstantopoulos, Iraklis S.

2014-07-01

400

Dependability Assessment using Binary Decision Diagrams (BDDs)  

Microsoft Academic Search

Presents the DREDD (Dependability and Risk Evaluation using Decision Diagrams) algorithm which incorporates coverage modeling into a BDD solution of a combinatorial model. BDDs, which do not use cutsets to generate system unreliability, can be used to find exact solutions for extremely large systems. The DREDD algorithm takes advantage of the efficiency of the BDD solution approach and increases the

Stacy A. Doyle; Joanne Bechta Dugan

1995-01-01

401

Expected Linear 3-Dimensional Voronoi Diagram Algorithm.  

National Technical Information Service (NTIS)

Let S be a set of n sites chosen independently from a uniform distribution in a cube in 3-dimensional Euclidean space. In the paper, an expected O(n) algorithm for constructing the Voronoi diagram for S together with numerical results obtained from an imp...

J. Bernal

1990-01-01

402

An extensible system for drawing block diagrams  

Microsoft Academic Search

This paper describes a system whose purpose is to accept input in a variety of languages and to produce block diagrams, such as flowcharts, as output. A special feature of the system is its use of syntax directed compilation techniques to process the various input languages. Through the use of incremental compilation, the system is able to offer extensibility of

H. E. Kulsrud

1972-01-01

403

Visualizing cognitive systems: getting past block diagrams  

Microsoft Academic Search

Visualisations play an important part in the development of ideas. They make ingredients and relations explicit, guide thinking processes of the designer or scientist, and support communications, often across the boundaries of disciplines. In the fields of cognitive psychology and human-machine interaction, block diagrams have been a dominant means for representing cognitive systems. However, we believe that this form of

Pieter Jan Stappers; John M. Flach

2004-01-01

404

Multistate Block Diagrams and Fault Trees  

Microsoft Academic Search

This paper shows how to model a multistate system with multistate components using binary variables. This modeling technique allows current binary algorithms for block diagrams and fault trees to be applied to multistate systems. Several multistate examples are presented, and some cases in which computational efficiency can be enhanced are discussed.

Alan P. Wood

1985-01-01

405

Fission stability diagram of sup 240 Pu  

SciTech Connect

We have used an axially symmetric deformed Thomas-Fermi model to evaluate the fission barrier of {sup 240}Pu as a function of the quadrupole moment {ital Q}{sub 2} for different values of the angular momentum {ital L} and temperature {ital T}. The fission stability diagram of this nucleus is investigated.

Garcias, F.; Barranco, M.; Wio, H.S. (Departament de Fisica, Universitat de ses Illes Balears, E-07071 Palma de Mallorca, Spain (ES)); Ngo, C. (Laboratoire National Saturne, F-91191 Gif-sur-Yvette, France); Nemeth, J. (Institute of Theoretical Physics, Eotvos University, H-1088 Budapest, Hungary)

1989-09-01

406

Asymmetric Wings of the Butterfly Diagram  

Microsoft Academic Search

We analyze hemispheric asymmetry in the sunspot distribution over a solar cycle. Butterfly diagrams as plots of the latitudes of emerging sunspots against time are studied in order to find similarities and differences between Northern and Southern hemispheres. Long-term anticorrelations between time lags in hemispheric leading and \\

N. V. Zolotova; D. I. Ponyavin

2008-01-01

407

Identification of complete data flow diagrams  

Microsoft Academic Search

The Structure Design is generated with Data Flow Diagrams (DFD). DFD have been used for more than ten years, and they are still popular. The main drawback of DFD is the lack of mathematical foundation. The great demand for bigger and more sophisticated computer systems makes necessary the formulation of a formal theory for DFD. This theory will provide a

Federico Vazquez

1994-01-01

408

Flow Diagram Decomposition Using Graph Transformations  

Microsoft Academic Search

The key challenge of model transformations in model-driven development is in transforming higher-level abstract models into more concrete ones that can be used to generate implementation level models, including executable business process representations and program code. Many of the modelling languages (like UML Activity Diagrams or BPMN) use unstructured flow graphs to describe the operation sequence of a business process.

A. Rensink; M. V. Zimakova

2009-01-01

409

Multimedia presentation design using data flow diagrams  

Microsoft Academic Search

Structured analysis\\/design methodology has been used in software development for many years. We propose a revised data flow diagram technique and system based on the structured analysis methodology. The system allows a multimedia presentation designer to stepwise refine his\\/her presentation toward an interactive Petri net, which defines the temporal behaviour of the presentation. The generated presentation can mutate itself at

Timothy K. Shih; C. H. Kuo; H. C. Keh; Y. H. Wang; C. S. Wang; S. K. C. Lo; Shuo-Chih Hsu

1997-01-01

410

Weight diagram construction of Lax operators  

SciTech Connect

We review and expand methods introduced in our previous paper. It is proved that cyclic weight diagrams corresponding to representations of affine Lie algebras allow one to construct the associated Lax operator. The resultant Lax operator is in the Miura-like form and generates the modified KdV equations. The algorithm is extended to the super-symmetric case.

Carbon, S.L.; Piard, E.J.

1991-10-01

411

Study of Phase Diagrams of Ternary Semiconductors.  

National Technical Information Service (NTIS)

In this three-year project on the theoretical studies of Hg-Cd-Te phase diagram, the liquidus and solidus have been calculated using the conditions to thermal coexistence of the liquid and solid. The pair approximation of the cluster variation method is u...

R. Kikuchi

1983-01-01

412

A generalized reliability block diagram (RBD) simulation  

Microsoft Academic Search

The authors demonstrate a computer simulation yielding reliability and maintainability information for any system based on the failure and repair distributions of the individual components. The information needed to link the various components together is taken directly from the reliability block diagram (RBD), thereby negating the need for writing specialized programs. Final results display 90% confidence intervals for four key

K. D. Figiel; D. R. Sule

1990-01-01

413

The Iron-Praseodymium Phase Diagram.  

National Technical Information Service (NTIS)

A phase diagram is proposed for the iron-praseodymium alloy system. Only one intermediate phase, Pr2Fe17, was observed in the system. Invariant points are the Pr2Fe17 peritectic point at 1105 plus or minus 8C and 89.5 at. % Fe and the eutectic point at 65...

A. E. Ray

1969-01-01

414

Near Earth Objects Program: Orbit Diagrams  

NSDL National Science Digital Library

This page provides access to diagrams of the orbits of a very large number of objects in the asteroid belt as well as comets that cross Earth's orbit. The collection is searchable by object name or designation and users can also browse through an extensive list of potentially hazardous asteroids.

Program, Nasa J.; Nasa

415

Nonverbal Poetry: Family Life-Space Diagrams.  

ERIC Educational Resources Information Center

Examines life-space diagrams as a form of nonverbal poetry which taps personal feelings, tells a story, and characterizes a particular life situation, forming a useful therapy technique that provides a family the opportunity to examine its internal family relationships. Offers two case studies, discusses five levels of knowing and awareness, and…

Bardill, Donald R.

2001-01-01

416

Method and apparatus for laying wire arrays  

DOEpatents

Wire arrays (11) having a continuous wire (12) which is formed into a predetermined pattern and adhered to a backing material or substrate (13) are fabricated by applying adhesive material (16a, 16b) along opposite edge portions (17, 18) of the substrate, positioning a row of winding spools (21) along each of the edge portions and repeatedly extending the wire between and around successive spools at the opposite edge portions. The wound wire is then traveled along each spool toward the substrate and into contact with the adhesive. The spools are then removed and a coating of hardenable material (54) is applied to secure the wound wire to the substrate. Tension in the wire is relieved prior to contact of the wire with the adhesive and a small amount of slack is introduced into the wire before the final coating step. Mechanism (32) is provided for lifting the spools away from the substrate without disturbing the wound wire. The method and apparatus enable manufacture of precisely configured wire arrays without complex or costly equipment and do not require structural alterations in the substrate for the purpose of accommodating to fabrication equipment.

Horowitz, Seymour M. (6525 Swainland Dr., Oakland, CA 94611); Nesbitt, Dale D. (1712 Marin Ave., Berkeley, CA 94707)

1986-01-01

417

Impersonal parameters from Hertzsprung-Russell diagrams  

NASA Astrophysics Data System (ADS)

An objective process for estimation of star cluster parameters from Hertzsprung-Russell (HR) diagrams is introduced, with direct inclusion of multiple stars, a least-squares fitting criterion, and standard error estimates. No role is played by conventional isochrones. Instead the quantity compared between observation and theory is the density of points (areal ) as it varies over the diagram. With as the effective observable quantity, standard parameter adjustment theory can be brought to bear on HR diagram analysis. Here we use the method of differential corrections with a least-squares fitting criterion, but any of the many known fitting methods should be applicable to comparison of observed and theoretical distributions. Diverse numerical schemes were developed to make the overall algorithm workable, including two that improve differentiability of by rendering point distributions effectively equivalent to continuous distributions in certain respects. Statistics of distributions are handled not via Monte Carlo methods but by the Functional Statistics Algorithm (hereafter FSA), a statistical algorithm that has been developed for HR diagram fitting but should serve as an alternative to Monte Carlo in many other applications. FSA accomplishes the aims of Monte Carlo with orders of magnitude less computation. Analysis of luminosity functions is included within the HR diagram algorithm as a special case. Areal density analysis of HR diagrams is acceptably fast because we handle stellar evolution via approximation functions, whose output also is more precisely differentiable than that of a full stellar evolution program. Evolution by approximation functions is roughly a million times as fast as full evolution and has virtually no numerical noise. The algorithmic ideas that lead to objective solutions can be applied to many kinds of HR diagram analysis that are now done subjectively. The present solution program is limited by speed considerations to use of one evolution program and exploration of variations in evolutionary physics is left for future versions. The program has miscellaneous refinements, such as allowing for distributions of chemical composition and interstellar extinction, as well as inclusion of binary star evolution, but so far not all have been tried in solutions. An algorithm is described for dealing with field stars directly in terms of , but has not yet been actively implemented. A synthetic globular cluster with known properties is analysed to demonstrate parameter convergence, solution consistency and comparison with known answers.

Wilson, R. E.; Hurley, Jarrod R.

2003-10-01

418

Thermal energy scavenger (rotating wire modules)  

SciTech Connect

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.

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

1980-11-04

419

A Legal Negotiatiton Support System Based on A Diagram  

NASA Astrophysics Data System (ADS)

We present an overview of a legal negotiation support system, ANS (Argumentation based Negotiation support System). ANS consists of a user interface, three inference engines, a database of old cases, and two decision support modules. The ANS users negotiates or disputes with others via a computer network. The negotiation status is managed in the form of the negotiation diagram. The negotiation diagram is an extension of Toulmin’s argument diagram, and it contains all arguments insisted by participants. The negotiation protocols are defined as operations to the negotiation diagram. By exchanging counter arguments each other, the negotiation diagram grows up. Nonmonotonic reasoning using rule priorities are applied to the negotiation diagram.

Nitta, Katsumi; Shibasaki, Masato; Yasumura, Yoshiaki; Hasegawa, Ryuzo; Fujita, Hiroshi; Koshimura, Miyuki; Inoue, Katsumi; Shirai, Yasuyuki; Komatsu, Hiroshi

420

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

NASA Astrophysics Data System (ADS)

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.

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

2012-10-01

421

Signal propagation in long wire chambers  

NASA Astrophysics Data System (ADS)

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.

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

2012-09-01

422

Spectroscopic research of underwater electrical wire explosion  

SciTech Connect

Results of spectroscopic research in the visible range of light of the radiation generated by underwater electrical wire explosions (UEWE) are presented. A pulsed generator with an output voltage of {approx}110 kV, current of {approx}70 kA, and rise time of {approx}60 ns was used for electrical explosion of Cu wires 0.1 mm in diameter and 50 mm in length. It was shown that UEWE is not governed by the 'polarity' effect, which plays an important role in electrical wire explosions in vacuum. The results of detailed space- and time-resolved spectroscopic measurements show that the radiation spectrum differs significantly of the spectrum expected from the exploding wire. A model is suggested based on the formation of a few {mu}m 'water' plasma layer in the vicinity of the exploding wire plasma which efficiently absorbs the radiation of the exploding wire.

Fedotov, A.; Sheftman, D.; Gurovich, V. Tz.; Efimov, S.; Bazilitski, G.; Krasik, Ya. E. [Physics Department, Technion-Israel Institute of Technology, 32000 Haifa (Israel); Oreshkin, V. I. [Institute of High Current Electronics, RAS, Tomsk (Russian Federation)

2008-08-15

423

Wired.  

ERIC Educational Resources Information Center

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)

Conklin, Aaron R.

1998-01-01

424

Electron Transport in Molecular Wires  

NASA Astrophysics Data System (ADS)

Numerical simulations have been performed to study the influence of ?-orbital interactions and molecule-metal coupling strength (?1=?2=?i) on the electronic transport properties of molecular assembly system. The model involves 1,4-dithiolbenzene (DTB) molecules stacked in one dimension ordered structure. The results show that the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) gap (HLG) is reduced when decreasing the intermolecular distance d and increasing the number of DTB molecular units N. The influences of the geometric and coupling-strength parameters d, N, ?-orbital, and ?i on the current-voltage (I-V) or the conductance-voltage (G-V) characteristics are investigated. It is found that the conductance gap depends on the HLG. The system in the regime of strong ?-interactions shows shorter conductance gap. The conductance gap for a wire made of two DTB molecular units decreases by 2.4 V when d changes from 6.9 to 3.3 Å, while it sharply decreases by 3.3 V when the molecular structure goes from a single molecule to a wire made of six molecular units. The results indicate also that ?i is an important factor in determining the current flow. The saturation current for a wire containing four molecular units increases by 150 ?A when ?i changes from 0.2 to 0.4 eV. In fact, the main factors that determine the I-V or G-V characteristics are clearly related to the magnitude of the HLG, ?i and the position of the energy levels of the molecule relative to the Fermi energy contacts.

Boudjella, Aissa; Gougam, Adel B.; Alizadeh, Hossein

2008-06-01

425

Evaluating Extinction Values using Wire Impactor Data  

NASA Technical Reports Server (NTRS)

The purpose of the study was to compare the extinctions calculated from data obtained with the Ames Wire Impactor to extinctions measured with the SAGE H satellite system. The comparison was intended to serve as a validation of the extinctions obtained using the wire impactor data. It was felt that if the extinctions obtained by the two diverse methods agreed well, it would be an indication that the number densities measured on the wires were correct.

1998-01-01

426

Origins of acoustic emission in superconducting wires  

SciTech Connect

Origins of acoustic emission (AE) in superconducting wires have been investigated. Our experimental results indicate that wire motion is a dominant source of AE in current carrying wires, both superconducting and nonsuperconducting. Furthermore, the results show that flux motion, except during flux jumping, produces no discernable acoustic signals. Both of these conclusions differ from the conclusions of earlier AE results, which attributed the major source of AE signals in superconductors and superconducting magnets to flux motion.

Tsukamoto, O.; Sinclair, M.W.; Steinhoff, M.F.; Iwasa, Y.

1981-05-01

427

On Wire Failures in Microelectronic Packages  

Microsoft Academic Search

At present, over 95% of the manufactured packages are still being wire-bonded. Due to the ongoing trend of miniaturization, material changes, and cost reduction, wire-bond-related failures are becoming increasingly important. Different finite-element (FE) techniques are explored for their ability to describe the thermomechanical behavior of the wire embedded in the electronic package. The developed nonlinear and parametric FE models are

Willem D. van Driel; Richard B. R. van Silfhout; G. Q. Zhang

2009-01-01

428

Nondestructive Evaluation of Aircraft and Spacecraft Wiring  

NASA Technical Reports Server (NTRS)

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.

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

2004-01-01

429

Corrosion of silver soldered orthodontic wires.  

PubMed

The amounts of metals liberated from silver soldered stainless steel and cobalt-chromium orthodontic wires were measured. Measurements were taken after 3 days and 24 days immersion in 0.9% sodium chloride solution. High amounts of copper and zinc and some cadmium from the silver solder were found. The silver soldered stainless steel wire corroded more than the cobalt-chromium type, and liberated more nickel and chromium than did the cobalt-chromium wires. PMID:6125077

Berge, M; Gjerdet, N R; Erichsen, E S

1982-01-01

430

Induced EMF in a coil of wire  

NSDL National Science Digital Library

Students use a simple set up consisting of a coil of wire and a magnet to visualize induced EMF. First, students move a coil of wire near a magnet and observe the voltage that results. They then experiment with moving the wire, magnet, and a second, current carrying coil. Students connect the coil to a circuit and the current from the induced EMF charges a conductor.

VU Bioengineering RET Program, School of Engineering,

431

Wire frame to MOVIE. BYU transfer program  

SciTech Connect

At SNLA, the primary computer-aided drafting tool is the Applicon Graphics System (AGS). The data base for mechanical parts on the AGS is a wire frame model. This report summarizes a method of adding surface information to the wire frame and passing this information up stream to MOVIE.BYU which is on a VAX computer and is used to produce shaded graphics pictures of the AGS wire frame model on a RAMTEK 9400 display terminal.

Robbins, D.; Byers, L.D.; Benner, M.S.

1982-12-01

432

Signal propagation in long wire chambers  

Microsoft Academic Search

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

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

2012-01-01

433

Conductance of a biomolecular wire  

PubMed Central

Carotenoids (Car) act as “wires” that discharge unwanted electrons in the reaction center of higher plants. One step in this “side-path” electron conduction is thought to be mediated by Car oxidation. We have carried out direct measurements of the conductance of single-Car molecules under potential control in a membrane-mimicking environment, and we found that when Car are oxidized conductance is enhanced and the electronic decay constant (?) is decreased. However, the neutral molecule may already be conductive enough to account for observed electron transfer rates.

Visoly-Fisher, Iris; Daie, Kayvon; Terazono, Yuichi; Herrero, Christian; Fungo, Fernando; Otero, Luis; Durantini, Edgardo; Silber, Juana J.; Sereno, Leonides; Gust, Devens; Moore, Thomas A.; Moore, Ana L.; Lindsay, Stuart M.

2006-01-01

434

Coordinating Communities and Building Governance in the Development of Schematic and Semantic Standards: the Key to Solving Global Earth and Space Science Challenges in the 21st Century.  

NASA Astrophysics Data System (ADS)

The Information Age in Science is being driven partly by the data deluge as exponentially growing volumes of data are being generated by research. Such large volumes of data cannot be effectively processed by humans and efficient and timely processing by computers requires development of specific machine readable formats. Further, as key challenges in earth and space sciences, such as climate change, hazard prediction and sustainable development resources require a cross disciplinary approach, data from various domains will need to be integrated from globally distributed sources also via machine to machine formats. However, it is becoming increasingly apparent that the existing standards can be very domain specific and most existing data transfer formats require human intervention. Where groups from different communities do try combine data across the domain/discipline boundaries much time is spent reformatting and reorganizing the data and it is conservatively estimated that this can take 80% of a project's time and resources. Four different types of standards are required for machine to machine interaction: systems, syntactic, schematic and semantic. Standards at the systems (WMS, WFS, etc) and at the syntactic level (GML, Observation and Measurement, SensorML) are being developed through international standards bodies such as ISO, OGC, W3C, IEEE etc. In contrast standards at the schematic level (e.g., GeoSciML, LandslidesML, WaterML, QuakeML) and at the semantic level (ie ontologies and vocabularies) are currently developing rapidly, in a very uncoordinated way and with little governance. As the size of the community that can machine read each others data depends on the size of the community that has developed the schematic or semantic standards, it is essential that to achieve global integration of earth and space science data, the required standards need to be developed through international collaboration using accepted standard proceedures. Once developed the standards also require some form of governance to maintain and then extend the standard as the science evolves to meet new challenges. A standard that does have some governance is GeoSciML, a data transfer standard for geoscience map data. GeoSciML is currently being developed by a consortium of 7 countries under the auspices of the Commission for the Management of and Application of Geoscience Information (CGI), a commission of the International Union of Geological Sciences. Perhaps other `ML' or ontology and vocabulary development `teams' need to look to their international domain specific specialty societies for endorsement and governance. But the issue goes beyond Earth and Space Sciences, as increasingly cross and intra disciplinary science requires machine to machine interaction with other science disciplines such as physics, chemistry and astronomy. For example, for geochemistry do we develop GeochemistryML or do we extend the existing Chemical Markup Language? Again, the question is who will provide the coordination of the development of the required schematic and semantic standards that underpin machine to machine global integration of science data. Is this a role for ICSU or CODATA or who? In order to address this issue, Geoscience Australia and CSIRO established the Solid Earth and Environmental Grid Community website to enable communities to `advertise' standards development and to provide a community TWIKI where standards can be developed in a globally `open' environment.

Wyborn, L. A.

2007-12-01

435

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

Code of Federal Regulations, 2013 CFR

...SAFETY AND HEALTH MANDATORY SAFETY STANDARDS-UNDERGROUND COAL MINES Underground Low- and Medium-Voltage Alternating Current Circuits § 75.906 Trailing cables for mobile equipment, ground wires, and ground check wires....

2013-07-01

436

Superconducting-wire fabrication. Final report  

SciTech Connect

Experiments were done leading to the fabrication of high-temperature superconducting composite wire. Bulk superconductor was characterized by using optical microscopy, scanning electron microscopy, and energy-dispersive x-ray spectroscopy. The chemical compatibility of superconducting materials with a number of metal sheathing candidates was tested, with silver offering the best compatibility. Wire was fabricated by drawing 0.250-inch-diameter silver tubing packed with superconducting powder. Single core wires were drawn to 0.037-inch diameter. The best critical current performance (660 A/cm2) for leaded bismuth 2-2-2-3 material was achieved by flattening single-core wire before heat treatment.

Glad, W.E.; Chase, G.G.

1990-05-01

437

49 CFR 393.28 - Wiring systems.  

Code of Federal Regulations, 2013 CFR

...Transportation (Continued) FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL MOTOR CARRIER SAFETY REGULATIONS PARTS...Truck-Tractor, Trailer, and Motor Coach Wiring, October 1981,...

2013-10-01

438

49 CFR 393.28 - Wiring systems.  

Code of Federal Regulations, 2010 CFR

...Transportation (Continued) FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL MOTOR CARRIER SAFETY REGULATIONS PARTS...Truck-Tractor, Trailer, and Motor Coach Wiring, October 1981,...

2009-10-01

439

49 CFR 393.28 - Wiring systems.  

Code of Federal Regulations, 2010 CFR

...Transportation (Continued) FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION FEDERAL MOTOR CARRIER SAFETY REGULATIONS PARTS...Truck-Tractor, Trailer, and Motor Coach Wiring, October 1981,...

2010-10-01

440

K-Wire position in tension band wiring of the Olecranon — A comparison of two techniques  

Microsoft Academic Search

Tension band wiring is a recognised standard treatment for olecranon fractures. We studied the effect of K-wire position on backing out of the wire in a group of 80 patients with closed transverse olecranon fractures with a minimum follow-up time of 9 months. The rate of wires backing out as seen on X-ray was three times greater in patients who

J. H. Mullett; F. Shannon; J. Noel; G. Lawlor; T. C. Lee; S. K O’Rourke

2000-01-01

441

Proof Test Diagrams for Zerodur Glass-Ceramic.  

National Technical Information Service (NTIS)

Proof test diagrams for Zerodur glass-ceramics are calculated from available fracture mechanics data. It is shown that the environment has a large effect on minimum time-to-failure as predicted by proof test diagrams.

D. S. Tucker

1991-01-01

442

Proof test diagrams for Zerodur glass-ceramic  

NASA Technical Reports Server (NTRS)

Proof test diagrams for Zerodur glass-ceramics are calculated from available fracture mechanics data. It is shown that the environment has a large effect on minimum time-to-failure as predicted by proof test diagrams.

Tucker, D. S.

1991-01-01

443

TOWER SECOND FLOOR INTERIOR, LOOKING WEST, SHOWING OVERHEAD TRACK DIAGRAM, ...  

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

TOWER SECOND FLOOR INTERIOR, LOOKING WEST, SHOWING OVERHEAD TRACK DIAGRAM, OPERATING LEVERS (BEING PULLED BY OPERATOR TOM HARTMAN), AND AUXILIARY TRACK DIAGRAM ABOVE DESK AT LEFT. - Baltimore & Ohio Railroad, Z Tower, State Route 46, Keyser, Mineral County, WV

444

Penguin diagrams for improved staggered fermions  

SciTech Connect

We calculate, at the one-loop level, penguin diagrams for improved staggered fermion operators constructed using various fat links. The main result is that diagonal mixing coefficients with penguin operators are identical between the unimproved operators and the improved operators using such fat links as Fat7, Fat7+Lepage, Fat7, HYP (I) and HYP (II). In addition, it turns out that the off-diagonal mixing vanishes for those constructed using fat links of Fat7, Fat7 and HYP (II). This is a consequence of the fact that the improvement by various fat links changes only the mixing with higher dimension operators and off-diagonal operators. The results of this paper, combined with those for current-current diagrams, provide complete matching at the one-loop level with all corrections of O(g{sup 2}) included.

Lee, Weonjong [School of Physics, Seoul National University, Seoul, 151-747 (Korea, Republic of)

2005-01-01

445

Modeling the Round Earth through Diagrams  

NASA Astrophysics Data System (ADS)

Earlier studies have found that students, including adults, have problems understanding the scientifically accepted model of the Sun-Earth-Moon system and explaining day-to-day astronomical phenomena based on it. We have been examining such problems in the context of recent research on visual-spatial reasoning. Working with middle school students in India, we have developed a pedagogical sequence to build the mental model of the Earth and tried it in three schools for socially and educationally disadvantaged students. This pedagogy was developed on the basis of (1) a reading of current research in imagery and visual-spatial reasoning and (2) students' difficulties identified during the course of pretests and interviews. Visual-spatial tools such as concrete (physical) models, gestures, and diagrams are used extensively in the teaching sequence. The building of a mental model is continually integrated with drawing inferences to understand and explain everyday phenomena. The focus of this article is inferences drawn with diagrams.

Padalkar, Shamin; Ramadas, Jayashree

446

Ring-Diagram Analysis: Status and Perspectives  

NASA Astrophysics Data System (ADS)

Ring diagram analysis is now more than a decade old. While the details of the technique are still evolving, the application of the method to MDI, TON, Mt. Wilson, HLH, and GONG data is providing intriguing results. Thanks to the work of many people, it is now becoming possible to observationally infer the complicated dynamics in the outer 15 Mm of the solar convection zone, investigate the depth dependence of meridional flow, and get a closer look at zonal jet-stream structures in the mid-latitudes. We may soon be able to similarly investigate the spatio-temporal distribution of scalar fields. As ring diagrams and other local helioseismology methods such as time-distance and acoustic imaging continue to mature, the comparison of results from different techniques on common data sets will provide a useful reality check.

Hill, F.

447

Study of constitution diagram aluminum-tantalum  

SciTech Connect

Alloys of aluminum with tantalum were for the first time obtained by aluminothermic method in 1868 by Moriniak. Later these alloys were studied in the works of Schirmeister (1915) and Brouwer (1938), moreover Brouwer established that tantalum with aluminum forms the chemical compound TaA1, which has tetragonal crystal lattice with parameters a=5.422 angstroms and c=8.536 angstroms (1). However despite the fact that alloys of aluminum with tantalum long ago are obtained already, constitution diagram of this system is not studied until recently. In connection with the application of tantalum as the modifying additive in aluminum alloys an emergency in the construction of this diagram, without the knowledge by which it is not possible to give the correct explanation of the mechanism of the very process of the modification of primary grain. For this purpose was undertaken this work. Russian translations.

Glazov, V.M.; Mal'tsev, M.V.; Chistyakov, Y.D.

1988-10-20

448

Phase diagram of model Cn >= 70 fullerenes  

NASA Astrophysics Data System (ADS)

Recent studies have confirmed that model C60 has a stable liquid phase confined to a rather narrow temperature range; in this letter we determine the phase diagram of model C70 and show that also this fullerene possesses a liquid phase whose existence range is wider than that of C60. A "corresponding state"behaviour of C60 and C70, emerging from a description in terms of reduced quantities of both the interaction potential and the phase diagrams' parameters, is then extended to higher-order fullerenes. Critical- and triple-point densities and temperatures of C76, C84 and C92 are thereby predicted. The decreasing accuracy of such a representation of Cn > 70 phase behaviour with increasing n is discussed in relation to the model potential features.

Abramo, M. C.; Caccamo, C.; Costa, D.; Pellicane, G.

2001-05-01

449

Krajewski diagrams and the standard model  

NASA Astrophysics Data System (ADS)

This paper provides a complete list of Krajewski diagrams representing the standard model of particle physics. We will give the possible representations of the algebra and the anomaly free lifts which provide the representation of the standard model gauge group on the fermionic Hilbert space. The algebra representations following from the Krajewski diagrams are not complete in the sense that the corresponding spectral triples do not necessarily obey to the axiom of Poincaré duality. This defect may be repaired by adding new particles to the model, i.e., by building models beyond the standard model. The aim of this list of finite spectral triples (up to Poincaré duality) is therefore to provide a basis for model building beyond the standard model.

Stephan, Christoph A.

2009-04-01

450

Processing a printed wiring board by single bath electrodeposition  

DOEpatents

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.

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

2010-12-07

451

Temperature measurement of fine wires by photothermal radiometry  

Microsoft Academic Search

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,

T. Borca-Tasciuc; G. Chen

1997-01-01

452

Nanoscale wires and related devices  

US Patent & Trademark Office Database

The present invention relates generally to sub-microelectronic circuitry, and more particularly to nanometer-scale articles, including nanoscale wires which can be selectively doped at various locations and at various levels. In some cases, the articles may be single crystals. The nanoscale wires can be doped, for example, differentially along their length, or radially, and either in terms of identity of dopant, concentration of dopant, or both. This may be used to provide both n-type and p-type conductivity in a single item, or in different items in close proximity to each other, such as in a crossbar array. The fabrication and growth of such articles is described, and the arrangement of such articles to fabricate electronic, optoelectronic, or spintronic devices and components. For example, semiconductor materials can be doped to form n-type and p-type semiconductor regions for making a variety of devices such as field effect transistors, bipolar transistors, complementary inverters, tunnel diodes, light emitting diodes, sensors, and the like.

2007-11-27

453

The mechanical behavior of a wire rope with an independent wire rope core  

Microsoft Academic Search

A new model for simulating the mechanical response of a wire rope with an independent wire rope core is presented. The rope is subjected to both an axial load and an axial torque. In contrast with previous models that consider the effective response of wound strands, the present model fully considers the double-helix configuration of individual wires within the wound

D. Elata; R. Eshkenazy; M. P. Weiss

2004-01-01

454

Wire-rod type electrohydrodynamic gas pumps with and without insulation cover over corona wire  

Microsoft Academic Search

The effect of an insulation cover on a corona wire for a wire–rod type electrohydrodynamic (EHD) gas pump was experimentally investigated and onedimensional cross sectional averaged analyses were performed. The insulation cover over the corona wire causes a fluctuation of the discharge current, resulting in fluctuations of the EHD gas flow. The insulation cover also changes the EHD force distribution,

Nozomi Takeuchi; Koichi Yasuoka; Jen-Shih Chang

2011-01-01

455

Surface temperature profiles of the corona wire in a plate-wire type electrostatic precipitator  

Microsoft Academic Search

The corona wire surface temperature profiles in a plate-wire-type electrostatic precipitator have been measured by an IR thermal image technique and thermocouples under both DC positive and negative corona discharge conditions. The results show that: the corona wire surface temperature profiles under positive coronas are more uniform than those of the negative coronas, where the differences between maximum and minimum

T. OhkuboU; J. S. Chang; A. A. Berezin; Y. Nomoto; T. Adachi

1992-01-01

456

Evaluation of wire bond integrity through force detected wire vibration analysis  

Microsoft Academic Search

This paper studies the feasibility of using force measurement to detect wire vibration for the evaluation of wire bond integrity. In this system, a tapping probe sends a single pulse or multiple pulses of controlled motion to the substrate adjacent to a bond end. This mechanical shock induces vibration propagation to the wire along and through the neighbouring materials. Another

H. Luo; Z. Lu; J. H. Nam; P. C. Y. Chen; W. Lin

2009-01-01

457

Fixed abrasive diamond wire machining—part I: process monitoring and wire tension force  

Microsoft Academic Search

The process monitoring and mechanics of fixed abrasive diamond wire saw machining are investigated in this study. New techniques to affix diamond particles to a steel wire core have advanced to make this process feasible for the machining of ceramics, wood, and foam materials. Developments in fixed abrasive diamond wire machining are first reviewed. Advantages of using fixed abrasive diamond

W. I. Clark; A. J. Shih; C. W. Hardin; R. L. Lemaster; S. B. McSpadden

2003-01-01

458

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

SciTech Connect

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.

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

459

Neural network design using Voronoi diagrams.  

PubMed

A novel approach is proposed which determines the number of layers, the number of neurons in each layer, and their connection weights for a particular implementation of a neural network, with the multilayer feedforward topology, designed to classify patterns in the multidimensional feature space. The approach is based on construction of a Voronoi diagram over the set of points representing patterns in feature space and this finds added usefulness in deriving alternate neural network structures for realizing the desired pattern classification. PMID:18276507

Bose, N K; Garga, A K

1993-01-01

460

Outlier Detection Based on Voronoi Diagram  

Microsoft Academic Search

Outlier mining is an important branch of data mining and has attracted much attention recently. The density-based method LOF\\u000a is widely used in application. However, selecting MinPts is non-trivial, and LOF is very sensitive to its parameters MinPts. In this paper, we propose a new outlier detection method based on Voronoi diagram, which we called Voronoi based Outlier\\u000a Detection (VOD).

Jilin Qu

2008-01-01

461

Sloan Digital Sky Survey: The Hubble Diagram  

NSDL National Science Digital Library

This section of the Sloan Digital Sky Survey's website provides an excellent explanation of how Astronomers are able to use red-shift to explain the expansion of the universe. An activity is provided for a user to retrace Edwin Hubble's steps of measuring magnitudes and calculating redshifts to make a Hubble Diagram. These pages are part of a large set of projects and activities provided by the Sloan Digital Sky Survey for advanced astronomy students.

2005-05-15

462

Breaking bad news--a flow diagram.  

PubMed

Breaking bad news is neither an easy nor a popular task. Properly handled, however, it can be given in a positive way that the individual can both accept and understand. There may be a range of emotions and concerns following the telling of bad news. These need to be explored and worked through with each individual. This flow diagram describes the steps in this important process. PMID:8081554

Faulkner, A; Maguire, P; Regnard, C

1994-01-01

463

Representing the Study Site in a Diagram  

NSDL National Science Digital Library

The purpose of this resource is to help students learn the skills and value of the translating complex interactions among Earth System components into a simplified diagram. Students visit a study site, where they observe and recall their existing knowledge of air, water, soil, and living things to make a list of interconnections among the four Earth system components. They make predictions about the effects of a change in a system, inferring ways these changes affect the characteristics of other related components.

The GLOBE Program, University Corporation for Atmospheric Research (UCAR)

2003-08-01

464

Pore formation phase diagrams for lipid membranes  

NASA Astrophysics Data System (ADS)

Critical lateral pressure for a pore formation and phase diagram of porous membrane are derived analytically as functions of the microscopic parameters of the lipid chains. The derivation exploits path-integral calculation of the free energy of the ensembles of semi-flexible strings and rigid rods that mimic the hydrophobic tails of lipids in the lipid bilayers and bolalipid membranes respectively. Analytical expressions for the area stretch/compressibility moduli of the membranes are derived in both models.

Mukhin, S. I.; Kheyfets, B. B.

2014-05-01

465

Using Diagrams and Models: 2.75  

NSDL National Science Digital Library

This article discusses the importance of abstraction and generalization in being able to use models and diagrams effectively, whether children are creating their own models to represent a situation and explain their thinking, or interpreting a provided model. The resource offers examples to illustrate these ideas as well as teaching strategies and activities in the areas of parity, mental addition, equivalent fractions, and multi-digit multiplication.

2012-09-26

466

Mixed wasted integrated program: Logic diagram  

SciTech Connect

The Mixed Waste Integrated Program Logic Diagram was developed to provide technical alternative for mixed wastes projects for the Office of Technology Development`s Mixed Waste Integrated Program (MWIP). Technical solutions in the areas of characterization, treatment, and disposal were matched to a select number of US Department of Energy (DOE) treatability groups represented by waste streams found in the Mixed Waste Inventory Report (MWIR).

Mayberry, J.; Stelle, S. [Science Applications International Corp., Idaho Falls, ID (United States); O`Brien, M. [Univ. of Arizona, Tucson, AZ (United States); Rudin, M. [Univ. of Nevada, Las Vegas, NV (United States); Ferguson, J. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States); McFee, J. [I.T. Corp., Albuquerque, NM (United States)

1994-11-30

467

From Farey sequences to resonance diagrams  

NASA Astrophysics Data System (ADS)

Farey sequences were discovered in the beginning of the nineteenth century proving very useful in number theory. These series are found to be tightly related to tune resonance diagrams in accelerators. So far, no connection has been made between these two fields. This paper aims to serve as a bridge between these two areas of knowledge introducing the concept of resonance sequences for the most efficient exploration of the tune space.

Tomás, R.

2014-01-01

468

Interval Diagrams: Increasing Efficiency of Symbolic Real-Time Verification  

Microsoft Academic Search

In this paper, we suggest interval diagram techniques for formal verification of real-time systems modeled by means of timed au- tomata. Interval diagram techniques are based on interval deci- sion diagrams (IDDs)—representing sets of system configurations of, e.g., timed automata—and interval mapping diagrams(IMDs)— modeling their transition behavior. IDDs are canonical rep resenta- tions of Boolean functions and allow for their

Karsten Strehl; Timed Automata

1999-01-01

469

The Critical Importance of Russell's Diagram  

NASA Astrophysics Data System (ADS)

The idea of dwarf and giants stars, but not the nomenclature, was first established by Eijnar Hertzsprung in 1905; his first diagrams in support appeared in 1911. In 1913 Henry Norris Russell could demonstrate the effect far more strikingly because he measured the parallaxes of many stars at Cambridge, and could plot absolute magnitude against spectral type for many points. The general concept of dwarf and giant stars was essential in the galactic structure work of Harlow Shapley, Russell's first graduate student. In order to calibrate the period-luminosity relation of Cepheid variables, he was obliged to fall back on statistical parallax using only 11 Cepheids, a very sparse sample. Here the insight provided by the Russell diagram became critical. The presence of yellow K giant stars in globular clusters credentialed his calibration of the period-luminosity relation by showing that the calibrated luminosity of the Cepheids was comparable to the luminosity of the K giants. It is well known that in 1920 Shapley did not believe in the cosmological distances of Heber Curtis' spiral nebulae. It is not so well known that in 1920 Curtis' plot of the period-luminosity relation suggests that he didn't believe it was a physical relation and also he failed to appreciate the significance of the Russell diagram for understanding the large size of the Milky Way.

Gingerich, O.

2013-04-01

470

The Eulerian buckling test for orthodontic wires.  

PubMed

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 been developed in order to measure the load due to buckling of orthodontic wires. Elastic titanium molybdenum alloy (TMA; SDS Ormco) and superelastic Nitinol (3M Unitek) and copper nickel-titanium (NiTi; SDS Ormco) wires, each having a rectangular cross section of 0.016 x 0.022 square inches (0.41 x 0.56 mm(2)), were used. The wires were activated and deactivated by loading and unloading. In order to analyse thermo-mechanical properties in buckling, mechanical tests were assisted by calorimetric measurements through differential scanning calorimetry (DSC). Statistical analysis to determine differences between the samples was undertaken using two-way analysis of variance (ANOVA) and Tukey's post hoc test, and one-way ANOVA to assess differences between the tested wires under similar conditions and different materials. The results suggest that the load due to buckling depends on material composition, wire length, the amount of activation, temperature, and deformation rate. The results can be considered as the lower bound for the loads experienced by teeth as far as a buckled wire is concerned. At a temperature higher than the austenite finish transition temperature, superelastic wires were strongly dependent on temperature and deformation rate. The effect due to an increase of deformation rate was similar to that of a decrease of temperature. Load variations due to temperature of a superelastic wire with a length of 20 mm were estimated to be approximately 4 g/degrees C. The high performance of an applied superelastic wire may be related to the high dynamics of the load in relation to temperature. PMID:18263890

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

2008-04-01

471

Exciton gas compression and metallic condensation in a single semiconductor quantum wire.  

PubMed

We study the metal-insulator transition in individual self-assembled quantum wires and report optical evidence of metallic liquid condensation at low temperatures. First, we observe that the temperature and power dependence of the single nanowire photoluminescence follow the evolution expected for an electron-hole liquid in one dimension. Second, we find novel spectral features that suggest that in this situation the expanding liquid condensate compresses the exciton gas in real space. Finally, we estimate the critical density and critical temperature of the phase transition diagram at n{c} approximately 1 x 10;{5} cm;{-1} and T{c} approximately 35 K, respectively. PMID:18764504

Alén, B; Fuster, D; Muñoz-Matutano, G; Martínez-Pastor, J; González, Y; Canet-Ferrer, J; González, L

2008-08-01

472

A 1Gb\\/s Optical Transceiver Array Chipset for Automotive Wired Interconnects  

Microsoft Academic Search

A 4-channel 1Gb\\/s optical transceiver chipset is realized in a 0.18-mum standard CMOS technology for the wired networks in automotive vehicles. The transmitter (LD driver) operates for 1-Gb\\/s LVDS\\/CML signals with AMC and APC loops. The output optical eye-diagrams demonstrate 0.2UI jitter characteristics with max. 80mApp modulation currents for 1-Gb\\/s 211 $1 input PRBS. Meanwhile, the receiver (TIA) demonstrates 76.6dBOmega

Boo-young Choi; Jung-won Han; Sung Min Park; Kang Yeob Park; Won-S. Oh; J.-C. Choi

2007-01-01

473

30 CFR 556.8 - Leasing maps and diagrams.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Leasing maps and diagrams. 556.8 Section 556...Management, General § 556.8 Leasing maps and diagrams. (a) Any area...Act. (b) BOEM shall prepare leasing maps and official protraction diagrams of...

2013-07-01

474

Surveillance area as a multiplicatively weighted Voronoi diagram  

Microsoft Academic Search

This paper presents the surveillance area as an ordered order-k multiplicatively weighted Voronoi diagram in R2. The boundaries between adjacent radars are the edges of the diagram, defined by the range ratio of radars taken pairwise. The radar range equation is used to describe the proximity rule necessary to generate the diagram. The proximity between a target and a radar

J. N. Portela; M. S. Alencar

2006-01-01

475

Generating Feynman diagrams and amplitudes with FeynArts 3  

Microsoft Academic Search

This paper describes the Mathematica package FeynArts used for the generation and visualization of Feynman diagrams and amplitudes. The main features of version 3 are: generation of diagrams in three levels, user-definable model files, support for supersymmetric models, and publication-quality Feynman diagrams in PostScript or LaTeX.

Thomas Hahn

2001-01-01

476

A high-level block-diagram signal processing language  

Microsoft Academic Search

The model of discrete-time computation underlying most block diagram languages makes them inappropriate for many important signal processing algorithms. A conceptual framework for a general high-level block diagram programming system is proposed. This framework, the closure model, is motivated by the representation of functions used in applicative languages such as LISP. An experimental block diagram language, BDL, based on this

G. Kopec

1979-01-01

477

AN ALGEBRAIC APPROACH TO CONSISTENCY CHECKING BETWEEN CLASS DIAGRAMS  

Microsoft Academic Search

There are several diagram methods for data modeling like a class diagram. It is very hard to describe a big data model of a large enterprise system into on e diagram. A large set of partial data models are used during designing an information system for a l arge enterprise. The skill of modelers makes fluctuation and discrepancy among data

HIDEKAZU ENJO; MOTONARI TANABU; JUNICHI IIJIMA

478

Improved Superconducting Wire for Wind Generators: Superconducting Wires for Direct-Drive Wind Generators  

SciTech Connect

REACT Project: Brookhaven National Laboratory will develop a low-cost superconducting wire that could be used in high-power wind generators. Superconducting wire currently transports 600 times more electric current than a similarly sized copper wire, but is significantly more expensive. Brookhaven National Laboratory will develop a high-performance superconducting wire that can handle significantly more electrical current, and will demonstrate an advanced manufacturing process that has the potential to yield a several-fold reduction in wire costs while using a using negligible amount of rare earth material. This design has the potential to make a wind turbine generator lighter, more powerful, and more efficient, particularly for offshore applications.

None

2012-01-01

479

SpaceWire Architectures: Present and Future  

NASA Technical Reports Server (NTRS)

A viewgraph presentation on current and future spacewire architectures is shown. The topics include: 1) Current Spacewire Architectures: Swift Data Flow; 2) Current SpaceWire Architectures : LRO Data Flow; 3) Current Spacewire Architectures: JWST Data Flow; 4) Current SpaceWire Architectures; 5) Traditional Systems; 6) Future Systems; 7) Advantages; and 8) System Engineer Toolkit.

Rakow, Glen Parker

2006-01-01

480

Multipoint, packed wire, and monolithic armatures  

Microsoft Academic Search

There are three types of nonarcing solid armatures that have been experimented with in railguns: multipoint armatures in which the faces of the armatures in sliding electrical contact with the rails consist of many more or less independent contact points or small patches; packed wire armatures in which the contact faces consist of very many packed wire ends; and monolithic

R. A. Marshall

1995-01-01

481

EXPERIMENTS WITH A DC WIRE IN RHIC  

SciTech Connect

A DC wire has been installed in RHIC to explore the long-range beam-beam effect, and test its compensation. We report on experiments that measure the effect of the wire's electro-magnetic field on the beam's lifetime and tune distribution, and accompanying simulations.

FISCHER,W.; CALAGA, R.; DORDA, U.; KOUTCHOUK, J.-P.; ZIMMERMANN, F.; SEN, T.

2007-06-25

482

Strength and Fatigue Life of Wire Rope  

Microsoft Academic Search

A method is presented that predicts the fatigue life of a large diameter wire rope, from test data for small diameter rope. Dimensional analysis and the technique of interpolation and extrapolation are employed. The method is applied first to study size effects on the breaking strength of wire ropes and then to predict fatigue strength. Results are compared with experimental

Chi-Hui Chien; Raymond A. LeClair; George A. Costello

1988-01-01

483

LANSCE-R WIRE-SCANNER SYSTEM  

SciTech Connect

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.

Gruchalla, Michael E. [Los Alamos National Laboratory

2011-01-01

484

Lansce Wire Scanning Diagnostics Device Mechanical Design  

SciTech Connect

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.

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

485

Diffraction-based small wire detection  

Microsoft Academic Search

This paper proposes a method of small wire detec- tion based on diffraction. The light beam is generated by a laser head with its focus on the central of a photosensitive element, and an electronic detection and switching module is developed to detect whether a wire or the like supplied to an operation machine is present. In response to a

Yong Xiao; Chi Zhang; Kuanyi Zhu

2011-01-01

486

Thirteen tesla magnet constructed with MJR wire  

Microsoft Academic Search

The authors have constructed an insert booster superconducting magnet of 20 mm clear bore and outside diameter of 100 mm and height 130 mm, wound and reacted from the Teledyne patented foraminous layered foil (jelly roll) wire fabricated by low cost, non-rebundled reduction to wire. This magnet was placed inside the 101 mm bore of a NbTi wound solenoid which

M. Siddall; W. McDonald; K. Efferson

1983-01-01

487

Experiments with a DC wire in RHIC.  

National Technical Information Service (NTIS)

A DC wire has been installed in RHIC to explore the long-range beam-beam effect, and test its compensation. We report on experiments that measure the effect of the wire's electro-magnetic field on the beam's lifetime and tune distribution, and accompanyin...

A. Kabel, F. Zimmerman, G. Robert-Demolaize, H. J. Kim, J. Qiang, J. P. Koutchouk, N. Abreu, R. Calaga, T. Sen, U. Dorda, W. Fischer

2007-01-01

488

Current Distribution for Wire Exploded in Vacuum.  

National Technical Information Service (NTIS)

This investigation explores the current sheath surrounding an exploding copper wire in vacuum. Rogovski coils are used to map the current sheath. The results are plotted as a function of time and radius. Soon after the transplosion of the wire, the curren...

D. C. Chern T. Korneff

1968-01-01

489

Ultrasonic aluminum wire bonding. Final report  

SciTech Connect

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.

Sim, J.R.

1980-09-01

490

Coaxial Wiring Structures in Printed Circuit Boards  

Microsoft Academic Search

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

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

2008-01-01

491

Superconducting wire with improved strain characteristics  

DOEpatents

A superconducting wire comprising a superconducting filament and a beryllium strengthened bronze matrix in which the addition of beryllium to the matrix permits a low volume matrix to exhibit reduced elastic deformation after heat treating which increases the compression of the superconducting filament on cooling and thereby improves the strain characteristics of the wire.

Luhman, Thomas (Westhampton Beach, NY); Klamut, Carl J. (E. Patchogue, NY); Suenaga, Masaki (Bellport, NY); Welch, David (Stony Brook, NY)

1982-01-01

492

Superconducting wire with improved strain characteristics  

DOEpatents

A superconducting wire comprising a superconducting filament and a beryllium strengthened bronze matrix in which the addition of beryllium to the matrix permits a low volume matrix to exhibit reduced elastic deformation after heat treating which increases the compression of the superconducting filament on cooling and thereby improve the strain characteristics of the wire.

Luhman, Thomas (Westhampton Beach, NY); Klamut, Carl J. (East Patchogue, NY); Suenaga, Masaki (Bellport, NY); Welch, David (Stony Brook, NY)

1982-01-01

493

Ultra-flexible biomedical electrodes and wires  

NASA Technical Reports Server (NTRS)

Soft, flexible electrode conforms to body contour during body motion. It is fabricated from an elastomer impregnated with a conductive powder which can be configured into any required shape, including a wire shape to connect the electrode directly to an electrical instrument or to a conventional metallic wire.

Rositano, S. A.

1970-01-01

494

Microfabricated wire arrays for Z-pinch.  

SciTech Connect

Microfabrication methods have been applied to the fabrication of wire arrays suitable for use in Z. Self-curling GaAs/AlGaAs supports were fabricated as an initial route to make small wire arrays (4mm diameter). A strain relief structure that could be integrated with the wire was designed to allow displacements of the anode/cathode connections in Z. Electroplated gold wire arrays with integrated anode/cathode bus connections were found to be sufficiently robust to allow direct handling. Platinum and copper plating processes were also investigated. A process to fabricate wire arrays on any substrate with wire thickness up to 35 microns was developed. Methods to handle and mount these arrays were developed. Fabrication of wire arrays of 20mm diameter was demonstrated, and the path to 40mm array fabrication is clear. With some final investment to show array mounting into Z hardware, the entire process to produce a microfabricated wire array will have been demonstrated.

Spahn, Olga Blum; Rowen, Adam M.; Cich, Michael Joseph; Peake, Gregory Merwin; Arrington, Christian L.; Nash, Thomas J.; Klem, John Frederick; Romero, Dustin Heinz

2008-10-01

495

Vibrating wire field-measuring technique  

Microsoft Academic Search

The technique described here is dedicated to the problem of alignment of quadrupole magnets, a very important issue for particle accelerators. The technique is based on the excitation of the harmonics of a wire vibration by Lorenz forces between current in a wire and the surrounding magnetic field. Theoretical analyses show that knowing the amplitude and the phase of the

Alexander Temnykh

1997-01-01

496

Wire-antenna designs using genetic algorithms  

Microsoft Academic Search

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

Edward E. Altshuler; Derek S. Linden

1997-01-01

497

49 CFR 236.723 - Circuit, double wire; line.  

Code of Federal Regulations, 2013 CFR

... 2013-10-01 2013-10-01 false Circuit, double wire; line. 236.723 Section...AND APPLIANCES Definitions § 236.723 Circuit, double wire; line. An electric circuit not employing a common return wire; a...

2013-10-01

498

Stiffness Corrections for the Vibration Frequency of a Stretched Wire  

ERIC Educational Resources Information Center

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)

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

1977-01-01

499

Long-Wearing Wire Guide For Welding Torch  

NASA Technical Reports Server (NTRS)

Insert for wire-guide tube on tungsten/inert-gas welding apparatus extends life of guide tube and increases accuracy of weld. Hardened insert resists wear by sliding tungsten wire. Chamfer guides wire into insert.

Gutow, David A.; Burley, Richard K.; Gilbert, Jeffrey L.; Fogel, Irving

1992-01-01

500

30 CFR 77.705 - Guy wires; grounding.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Guy wires; grounding. 77.705 Section 77...OF UNDERGROUND COAL MINES Grounding § 77.705 Guy wires; grounding. Guy wires from poles...securely connected to the system ground or be provided...

2013-07-01