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1

Influence diagrams and decision trees for severe accident management.  

National Technical Information Service (NTIS)

A review of relevant methodologies based on Influence Diagrams (IDs), Decision Trees (DTs), and Containment Event Trees (CETs) was conducted to assess the practicality of these methods for the selection of effective strategies for Severe Accident Manageme...

W. W. J. Goetz

1996-01-01

2

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

3

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

4

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

5

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

6

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

7

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 ...

8

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

9

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

10

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

11

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

12

Accident investigation  

NASA Technical Reports Server (NTRS)

Aircraft accident investigations are discussed with emphasis on those accidents that involved weather as a contributing factor. The organization of the accident investigation board for air carrier accidents is described along with the hearings, and formal report preparation. Statistical summaries of the investigations of general aviation accidents are provided.

Brunstein, A. I.

1979-01-01

13

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

14

Accident investigation  

NASA Technical Reports Server (NTRS)

The National Transportation Safety Board (NTSB) has attributed wind shear as a cause or contributing factor in 15 accidents involving transport-categroy airplanes since 1970. Nine of these were nonfatal; but the other six accounted for 440 lives. Five of the fatal accidents and seven of the nonfatal accidents involved encounters with convective downbursts or microbursts. Of other accidents, two which were nonfatal were encounters with a frontal system shear, and one which was fatal was the result of a terrain induced wind shear. These accidents are discussed with reference to helping the aircraft to avoid the wind shear or if impossible to help the pilot to get through the wind shear.

Laynor, William G. Bud

1987-01-01

15

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

16

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.

17

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

18

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

19

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

20

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

21

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

22

Highchair accidents.  

PubMed

In order to establish guidelines for highchair accident prevention we investigated causes, mode and complications of highchair accidents by the following methods: The charts of 103 children attending our Accident & Emergency department for highchair related injuries were studied retrospectively. Questionnaires were sent to the parents to obtain detailed information about the mode of accident. They were also asked to suggest preventive measures. In addition, a random sample survey was performed with 163 families inquiring about the rate of highchair use and the incidence of highchair related accidents. Of the 103 infants, 15.5% had sustained a skull fracture, 13.6% a brain concussion, 2.0% limb fractures and 68.9% a simple contusion of the head or lacerations to the scalp or face. The questionnaires were fully completed by 61.2% of parents. Every second family reported that their infant had tried to stand up in the highchair before falling off (only one child had been wearing a restraint). In a further 14.3% of accidents the highchair tipped over. Eighty-seven percent of parents would appreciate a pre-installation of restraints, 54.0% requested more informative instructions for users, and 33.3% asked for products with better stability. The random sample survey revealed a highchair use rate of 92%; 18% of families used highchairs equipped with restraints, and 6% reported highchair accidents sustained by their children. We conclude that most highchair accidents occur when unrestrained infants try to stand up. Pre-installed child restraints, better manuals for users and increased highchair stability should be recommended as promising accident prevention strategies. PMID:10229045

Mayr, J M; Seebacher, U; Schimpl, G; Fiala, F

1999-03-01

23

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

24

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

25

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

26

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.

27

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

28

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

29

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

30

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

31

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

32

Nuclear accident  

Microsoft Academic Search

A malfunctioning valve at the Three Mile Island power plant in Pennsylvania was the prelude to the worst nuclear accident in U.S. history. Despite assurances that radiation leaked from the plant posed no immediate threat, the population around the plant dwindled as unforced weekend evacuations grew common. Radiation at the power plant site reached 30 mrem\\/hr on March 30. While

T. Mathews; S. Agrest; G. Borger; M. Lord; W. D. Marbach; W. J. Cook; M. Sheils

1979-01-01

33

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

34

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

35

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

36

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

37

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

38

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

39

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.

40

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

41

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

42

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

43

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

44

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

45

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

46

Radiation accidents.  

PubMed

It is essential that emergency physicians understand ways to manage patients contaminated by radioactive materials and/or exposed to external radiation sources. Contamination accidents require careful surveys to identify the metabolic pathway of the radionuclides to guide prognosis and treatment. The level of treatment required will depend on careful surveys and meticulous decontamination. There is no specific therapy for the acute radiation syndrome. Prophylactic antibodies are desirable. For severely exposed patients treatment is similar to the supportive care given to patients undergoing organ transplantation. For high-dose extremity injury, no methods have been developed to reverse the fibrosing endarteritis that eventually leads to tissue death so frequently found with this type of injury. Although the Three Mile Island episode of March 1979 created tremendous public concern, there were no radiation injuries. The contamination outside the reactor building and the release of radioiodine were negligible. The accidental fuel element meltdown at Chernobyl, USSR, resulted in many cases of acute radiation syndrome. More than 100,000 people were exposed to high levels of radioactive fallout. The general principles outlined here are applicable to accidents of that degree of severity. PMID:3526994

Saenger, E L

1986-09-01

47

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

48

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

49

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

50

Preliminary Master Logic Diagram for ITER operation  

SciTech Connect

This paper describes the work performed to develop a Master Logic Diagram (MLD) for the operations phase of the International Thermonuclear Experimental Reactor (ITER). The MLD is a probabilistic risk assessment tool used to identify the broad set of potential initiating events that could lead to an offsite radioactive or toxic chemical release from the facility under study. The MLD described here is complementary to the failure modes and effects analyses (FMEAs) that have been performed for ITER`s major plant systems in the engineering evaluation of the facility design. While the FMEAs are a bottom-up or component level approach, the MLD is a top-down or facility level approach to identifying the broad spectrum of potential events. Strengths of the MLD are that it analyzes the entire plant, depicts completeness in the accident initiator process, provides an independent method for identification, and can also identify potential system interactions. MLDs have been used successfully as a hazard analysis tool. This paper describes the process used for the ITER MLD to treat the variety of radiological and toxicological source terms present in the ITER design. One subtree of the nineteen page MLD is shown to illustrate the levels of the diagram.

Cadwallader, L.C. [INEEL, Idaho Falls, ID (United States); Taylor, N.P.; Poucet, A.E. [ITER San Diego Joint Work Site, La Jolla, CA (United States)

1998-04-01

51

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

52

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

53

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

54

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

55

ITER reference accidents  

Microsoft Academic Search

Reference accidents are selected to envelope possible accident sequences to confirm the adequacy of ITER's safety design. Analyses of ITER reference accidents were carried out starting from postulated initiating events (PIE) to all consequential failures including environmental releases, if any. In case of plasma control malfunctioning, up to 3.3GW of fusion power can be reached transiently, however, no radiological consequence

H.-W. Bartels; A. Poucet; G. Cambi; C. Gordon; M. Gaeta; W. Gulden; T. Honda; M. Iseli; H. Jahn; J. Koonce; O. Kveton; B. Merrill; N. Mitchell; R. L. Moore; D. Petti; S. Polkinghorne; M. T. Porfiri; J. Raeder; G. Saji; E. Stubbe; S. J. Piet; L. Topilski; N. Uckan; W. VanHove

1998-01-01

56

Nuclear criticality accidents  

Microsoft Academic Search

Criticality occurs when a sufficient quantity of fissionable material is accumulated, and it results in the liberation of nuclear energy. All process accidents have involved plutonium or highly enriched uranium, as have most of the critical experiment accidents. Slightly enriched uranium systems require much larger quantities of material to achieve criticality. An appreciation of criticality accidents should be based on

1991-01-01

57

Learning in accident reduction  

Microsoft Academic Search

Accidents of street car and motor coach operators show a reduction as on-the-job learning takes place. For 60 street car motormen and 34 motor coach operators, most of the improvements in reduction in the number of accidents was accomplished by the sixth or seventh month of employment. By the end of the seventeenth month the accident rate was reduced more

Edwin E. Ghiselli; Clarence W. Brown

1947-01-01

58

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

59

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

60

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

61

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

62

Nuclear criticality accidents.  

PubMed

Criticality occurs when a sufficient quantity of fissionable material is accumulated, and it results in the liberation of nuclear energy. All process accidents have involved plutonium or highly enriched uranium, as have most of the critical experiment accidents. Slightly enriched uranium systems require much larger quantities of material to achieve criticality. An appreciation of criticality accidents should be based on an understanding of factors that influence criticality, which are discussed in this article. PMID:1962246

Smith, D R

1991-01-01

63

Laser accidents: Being Prepared  

SciTech Connect

The goal of the Laser Safety Officer and any laser safety program is to prevent a laser accident from occurring, in particular an injury to a person's eyes. Most laser safety courses talk about laser accidents, causes, and types of injury. The purpose of this presentation is to present a plan for safety offices and users to follow in case of accident or injury from laser radiation.

Barat, K

2003-01-24

64

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

65

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

66

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

67

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

68

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

69

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

70

The Tokaimura Nuclear Accident  

NSDL National Science Digital Library

The 1999 accident at the Tokaimura nuclear fuel processing plant near Tokyo is the context for a student discussion on nuclear power and the consequences of a nuclear accident. The case covers issues ranging from chemical process safety to risk management

Ryan, Michael E.

2001-09-01

71

Civil aircraft accident investigation.  

PubMed

This talk reviews some historic aircraft accidents and some more recent. It reflects on the division of accident causes, considering mechanical failures and aircrew failures, and on aircrew training. Investigation results may lead to improved aircraft design, and to appropriate crew training. PMID:24057309

Haines, Daniel

2013-01-01

72

[Accidents and injuries at work].  

PubMed

In the case of an accident at work, the person concerned is insured by law according to the guidelines of the Sozialgesetzbuch VII as far as the injuries have been caused by this accident. The most important source of information on the incident in question is the accident report that has to be sent to the responsible institution for statutory accident insurance and prevention by the employer, if the accident of the injured person is fatal or leads to an incapacity to work for more than 3 days (= reportable accident). Data concerning accidents like these are sent to the Deutsche Gesetzliche Unfallversicherung (DGUV) as part of a random sample survey by the institutions for statutory accident insurance and prevention and are analyzed statistically. Thus the key issues of accidents can be established and used for effective prevention. Although the success of effective accident prevention is undisputed, there were still 919,025 occupational accidents in 2011, with clear gender-related differences. Most occupational accidents involve the upper and lower extremities. Accidents are analyzed comprehensively and the results are published and made available to all interested parties in an effort to improve public awareness of possible accidents. Apart from reportable accidents, data on the new occupational accident pensions are also gathered and analyzed statistically. Thus, additional information is gained on accidents with extremely serious consequences and partly permanent injuries for the accident victims. PMID:24863704

Standke, W

2014-06-01

73

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

74

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

75

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

76

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

77

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

78

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

79

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

80

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

81

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

82

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

83

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

84

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

85

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

86

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

87

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

88

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

89

Persistence of airline accidents.  

PubMed

This paper expands on air travel accident research by examining the relationship between air travel accidents and airline traffic or volume in the period from 1927-2006. The theoretical model is based on a representative airline company that aims to maximise its profits, and it utilises a fractional integration approach in order to determine whether there is a persistent pattern over time with respect to air accidents and air traffic. Furthermore, the paper analyses how airline accidents are related to traffic using a fractional cointegration approach. It finds that airline accidents are persistent and that a (non-stationary) fractional cointegration relationship exists between total airline accidents and airline passengers, airline miles and airline revenues, with shocks that affect the long-run equilibrium disappearing in the very long term. Moreover, this relation is negative, which might be due to the fact that air travel is becoming safer and there is greater competition in the airline industry. Policy implications are derived for countering accident events, based on competition and regulation. PMID:20618386

Barros, Carlos Pestana; Faria, Joao Ricardo; Gil-Alana, Luis Alberiko

2010-10-01

90

Accident resistant transport container  

DOEpatents

The invention relates to a container for the safe air transport of plutonium having several intermediate wood layers and a load spreader intermediate an inner container and an outer shell for mitigation of shock during a hypothetical accident.

Andersen, John A. (Albuquerque, NM); Cole, James K. (Albuquerque, NM)

1980-01-01

91

Criticality accident alarm system.  

National Technical Information Service (NTIS)

The American National Standard ANSI/ANS-8.3-1986, Criticality Accident Alarm System provides guidance for the establishment and maintenance of an alarm system to initiate personnel evacuation in the event of inadvertent criticality. In addition to identif...

R. E. Malenfant

1991-01-01

92

Accidents en radiothérapie : un historique  

Microsoft Academic Search

Radiotherapy accidents are exceedingly rare. However, they may have major negative consequences : for health (and sometimes life) of victims as well as for the trust that patients put in radiotherapy and radiation oncologists. Each accident must be pointed out, analysed and reported, in order to allow preventive actions, avoiding repetitive accidents. Through examples of majors accidents occurred all over the

J. M Cosset; P Gourmelon

2002-01-01

93

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

94

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

95

Maritime accident investigation methodologies.  

PubMed

Whenever a naval disaster occurs, a public outcry is heard to a full investigation into the causes of the event. Although the maritime industry has an outstanding reputation in accident investigation, such investigations are hardly conducted in inland shipping or leisure craft sailing. Due to a number of serious accidents in the maritime sector and increasing interest by public and media, the philosophy of independent investigations has gained interest at a policy making level in the European Union and with international NGO's, such as the International Maritime Organization IMO. The purpose of this paper is to discuss the application of this methodology in all segments of shipping. The paper elaborates a conceptual model, principle processes and available techniques as a common orientation to safety-focused investigations. Accident investigation reports of Dutch investigative agencies are benchmarked to this model assessing the potential of the approach to all segments of shipping. It shows the applicability to minor as well as major accidents and the importance of independence. Systemic deficiencies at all levels in safety of shipping are identified and a generic applicability is demonstrated. It is concluded that independent accident investigation provides a powerful diagnostic tool for reducing the peril of drowning. PMID:14664367

Stoop, J A

2003-12-01

96

[Accidents affecting potato harvesters].  

PubMed

During industrialization in agriculture, many farming machines have been introduced. It is well-known that farming is a dangerous workplace and that farm machinery cause many serious accidents every year. Four cases of accidents with potato harvesters are discussed. In three of four cases the farmers were injured while cleaning the machine without stopping it, which probably was the main cause of the accidents. Farmers are in general not careful enough when using farm machinery. Every year, farmers in Denmark are severely invalided in accidents with potato harvesters. A strategy to lower the accidents is proposed: 1. Information of farmers, farmer schools, machine constructors and importers about mechanisms of injury. 2. A better education of farmers in using potato harvesters (and other farming machines). 3. Better fencing of the potato harvesters. 4. If possibly constructional changes in the potato harvesters so things will not get stuck, or so that the machine will stop if things stuck. 5. Installation of switches on potato harvesters, which can be reached from all positions, stopping the machines immediately, or a remote switch control carried by the farmer. PMID:8212405

Hansen, J U

1993-09-27

97

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

98

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

99

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

100

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

101

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

102

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

103

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

104

Criticality accident alarm system  

SciTech Connect

The American National Standard ANSI/ANS-8.3-1986, Criticality Accident Alarm System provides guidance for the establishment and maintenance of an alarm system to initiate personnel evacuation in the event of inadvertent criticality. In addition to identifying the physical features of the components of the system, the characteristics of accidents of concern are carefully delineated. Unfortunately, this ANSI Standard has led to considerable confusion in interpretation, and there is evidence that the minimum accident of concern'' may not be appropriate. Furthermore, although intended as a guide, the provisions of the standard are being rigorously applied, sometimes with interpretations that are not consistent. Although the standard is clear in the use of absorbed dose in free air of 20 rad, at least one installation has interpreted the requirement to apply to dose in soft tissue. The standard is also clear in specifying the response to both neutrons and gamma rays. An assembly of uranyl fluoride enriched to 5% {sup 235}U was operated to simulate a potential accident. The dose, delivered in a free run excursion 2 m from the surface of the vessel, was greater than 500 rad, without ever exceeding a rate of 20 rad/min, which is the set point for activating an alarm that meets the standard. The presence of an alarm system would not have prevented any of the five major accidents in chemical operations nor is it absolutely certain that the alarms were solely responsible for reducing personnel exposures following the accident. Nevertheless, criticality alarm systems are now the subject of great effort and expense. 13 refs.

Malenfant, R.E.

1991-01-01

105

Accidents and Aging.  

National Technical Information Service (NTIS)

Elderly people incur a high rate of accidental injuries and fatalities (a death rate more than twice that of the population at large). Empirical evidence to substantiate the seriousness of product-related accidents for people over age 55 was analyzed. Thi...

S. J. Czaja, K. Hammond, C. C. Drury

1982-01-01

106

Physics in Accident Investigations.  

ERIC Educational Resources Information Center

Describes physics formulas which can be used by law enforcement officials to determine the possible velocity of vehicles involved in traffic accidents. These include, among others, the slide to stop-level road, slide to stop-sloping roadway, and slide to stop-two different surfaces formulas. (JN)

Brake, Mary L.

1981-01-01

107

Factbook on U.S. Pedestrian Accidents.  

National Technical Information Service (NTIS)

Three sets of accident data files have been analyzed to obtain a greater understanding of the personal, situational, and vehicle-related factors involved in pedestrian accidents. These include all fatal pedestrian accidents contained in the Fatal Accident...

A. C. Wolfe J. O'Day

1981-01-01

108

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

109

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

110

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

111

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

112

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

113

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

114

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

115

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

116

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

117

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

118

Determinants of Ship Accident Seaworthiness  

Microsoft Academic Search

This study investigates determinants of the seaworthiness of ships involved in accidents, utilizing detailed data of individual tanker, container and bulk ship (U.S. and foreign) accidents investigated by the U.S. Coast Guard. Ordered probit estimation results suggest that ship accident seaworthiness: 1) increases with ship size; 2) is greater if the ship is classified by the American Bureau of Shipping

Wayne K Talley

1999-01-01

119

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

120

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

121

Applying STAMP in Accident Analysis  

NASA Technical Reports Server (NTRS)

Accident models play a critical role in accident investigation and analysis. Most traditional models are based on an underlying chain of events. These models, however, have serious limitations when used for complex, socio-technical systems. Previously, Leveson proposed a new accident model (STAMP) based on system theory. In STAMP, the basic concept is not an event but a constraint. This paper shows how STAMP can be applied to accident analysis using three different views or models of the accident process and proposes a notation for describing this process.

Leveson, Nancy; Daouk, Mirna; Dulac, Nicolas; Marais, Karen

2003-01-01

122

Laser accidents: occurrence and response.  

PubMed

The goal of the laser safety officer and any laser safety program is to prevent a laser accident from occurring, in particular, one that causes an injury to a person's eyes. Most laser safety courses "in-house commercial" discuss laser accidents, causes, and types of injury. Many do not address appropriate actions to be taken if such an accident occurs. This article reviews a sampling of laser accidents that have occurred and provides a quick overview of the appropriate steps to take when a laser accident occurs. PMID:12751200

Barat, Ken

2003-05-01

123

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

124

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

125

[Risk factors in traffic accidents].  

PubMed

Traffic accidents, which influence to every age group people, are an important public health. This study to determine which condition it has happened more, which days, months and years it has happened, what things have caused to happen traffic accidents. The study was made in Erciyes University Medical School Emergency Department. 31,550 patients applied to emergency department in a period of twelve months in 1998. 7098 (22%) cases of these were traffic accidents. It has done on 710 patients who have been brought to emergency by traffic accidents, and 10% systematic sampling of 7098 people. 504 (71%) of patients were male, 206 (29%) of them were female, the average age was 26.0 (min-max: 1-85). It was observed that traffic accidents occurred during peak times 1200-1800 p.m. The number of traffic accidents was higher during the weekends and in may and June than other times. All the accidents occurred in the same way both within and outside urban area. But the drivers hit the pedestrians more in the urban area. Although it has been seen 'the cars' in the accidents the most. The most mortality has been occurred in bus, minibus and motorbike accidents. The first treatment place of the casualties of 80.5% was at university emergency department. 619 all of the casualties who were admitted the university emergency department was simple injured. They all left the hospital with cure. 52 of casualties lost their life. As a result, some risk factors increase incidence of traffic accidents. Considering these risk factors in taking measures is of great importance in prevention of traffic accidents. Morbidity and mortality are affected by place where accidents occur, time of accident, properties of motor vehicles, and quality of medical care performed following the incident. PMID:11813478

Sözüer, M; Yildirim, C; Senol, V; Unalan, D; Naçar, M; Günay, O

2000-10-01

126

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

127

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

128

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

129

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

130

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

131

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

132

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

133

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

134

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

135

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

136

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

137

Mort User's Manual: For use with the Management Oversight and Risk Tree analytical logic diagram  

SciTech Connect

This report contains the User's Manual for MORT (Management Oversight and Risk Tree), a logic diagram in the form of a work sheet'' that illustrates a long series of interrelated questions. MORT is a comprehensive analytical procedure that provides a disciplined method for determining the causes and contributing factors of major accidents. Alternatively, it serves as a tool to evaluate the quality of an existing system. While similar in many respects to fault tree analysis, MORT is more generalized and presents over 1500 specific elements of an ideal universal'' management program for optimizing environment, safety and health, and other programs. This User's Manual is intended to be used with the MORT diagram dated February 1992.

Knox, N.W.; Eicher, R.W.

1992-02-01

138

Contributive factors to aviation accidents.  

PubMed

The objective of the study was to compare the results of aviation accident analyses performed by the Center for Investigation and Prevention of Aviation Accidents (CENIPA) with the method Human Factors Analysis and Classification System (HFACS). The final reports of thirty-six general aviation accidents occurring between 2000 and 2005 in the State of São Paulo, Southeastern Brazil were analyzed and compared. CENIPA reports mentioned 163 contributive factors, while HFACS identified 370 factors. It was concluded that CENIPA reports did not contemplate the organizational factors associated with aviation accidents. PMID:21344127

Fajer, Marcia; Almeida, Ildeberto Muniz de; Fischer, Frida Marina

2011-04-01

139

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

140

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

141

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

142

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

143

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

144

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

145

First Responders and Criticality Accidents  

SciTech Connect

Nuclear criticality accident descriptions typically include, but do not focus on, information useful to first responders. We studied these accidents, noting characteristics to help (1) first responders prepare for such an event and (2) emergency drill planners develop appropriate simulations for training. We also provide recommendations to help people prepare for such events in the future.

Valerie L. Putman; Douglas M. Minnema

2005-11-01

146

Deterministic accident analysis for RBMK  

Microsoft Academic Search

Within the framework of an European Commission sponsored activity, an assessment of the deterministic safety technology of the ‘post-Chernobyl modernized’ Reactor Bolshoy Moshchnosty Kipyashiy (RBMK) has been completed. The accident analysis, limited to the area of Design Basis Accident, constituted the key subject for the study; events not including the primary circuit were not considered, as well as events originated

F. D’Auria; B. Gabaraev; S. Soloviev; O. Novoselsky; A. Moskalev; E. Uspuras; G. M. Galassi; C. Parisi; A. Petrov; V. Radkevich; L. Parafilo; D. Kryuchkov

2008-01-01

147

TMI2 accident evaluation program  

Microsoft Academic Search

This report establishes the basis and scope of work for the Three Mile Island Unit No. 2 (TMI-2) Accident Evaluation Program sponsored by the Department of Energy (DOE). The current understanding of the TMI-2 accident is reviewed, with emphasis on the end-state distribution of important radioisotopes and the progression of core damage leading to gross core failure and fuel migration

E. L. Tolman; J. M. Broughton; R. K. McCardell; S. Langer; R. R. Hobbins; W. F. Domenico; P. R. Davis

1986-01-01

148

German aircraft accident statistics, 1930  

NASA Technical Reports Server (NTRS)

The investigation of all serious accidents, involving technical defects in the airplane or engine, is undertaken by the D.V.L. in conjunction with the imperial traffic minister and other interested parties. All accidents not clearly explained in the reports are subsequently cleared up.

Weitzmann, Ludwig

1932-01-01

149

49 CFR 801.32 - Accident reports.  

Code of Federal Regulations, 2010 CFR

...AVAILABILITY OF INFORMATION Accident Investigation Records § 801.32 Accident reports. (a) The...S. civil transportation accidents, in accordance with 49...inspection in the NTSB's public reference room and/or on the...

2010-10-01

150

22 CFR 102.8 - Reporting accidents.  

Code of Federal Regulations, 2010 CFR

...be expected to report the accident to the Foreign Service...Aeronautics Administration, any accident occurring to a scheduled...and have on file for ready reference, the address and telephone...promptly to the Department accidents to any United...

2009-04-01

151

22 CFR 102.8 - Reporting accidents.  

Code of Federal Regulations, 2010 CFR

...be expected to report the accident to the Foreign Service...Aeronautics Administration, any accident occurring to a scheduled...and have on file for ready reference, the address and telephone...promptly to the Department accidents to any United...

2010-04-01

152

49 CFR 801.32 - Accident reports.  

Code of Federal Regulations, 2010 CFR

...AVAILABILITY OF INFORMATION Accident Investigation Records § 801.32 Accident reports. (a) The...S. civil transportation accidents, in accordance with 49...inspection in the NTSB's public reference room and/or on the...

2009-10-01

153

Probability of spent fuel transportation accidents  

SciTech Connect

The transported volume of spent fuel, incident/accident experience and accident environment probabilities were reviewed in order to provide an estimate of spent fuel accident probabilities. In particular, the accident review assessed the accident experience for large casks of the type that could transport spent (irradiated) nuclear fuel. This review determined that since 1971, the beginning of official US Department of Transportation record keeping for accidents/incidents, there has been one spent fuel transportation accident. This information, coupled with estimated annual shipping volumes for spent fuel, indicated an estimated annual probability of a spent fuel transport accident of 5 x 10/sup -7/ spent fuel accidents per mile. This is consistent with ordinary truck accident rates. A comparison of accident environments and regulatory test environments suggests that the probability of truck accidents exceeding regulatory test for impact is approximately 10/sup -9//mile.

McClure, J. D.

1981-07-01

154

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

155

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

156

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

157

[Traffic accidents in alcoholic intoxication].  

PubMed

A study of group comprising all road accidents caused by drivers of private cars who were under the influence of alcohol (BAC > = 0.3 g/kg; X = 1.56 +/- 0.62 g/kg) that occurred in a defined area over the span of one calendar year (n = 625) was compared with a randomly selected control group of 718 road accidents in which the drivers had not been under the influence of alcohol. The drivers in the study group were marginally younger than the ones in the control group. However, there was no evidence of an alcohol related increase in the risk of an accident associated with younger age. The sex ratio in the study group corresponded to that, generally found amongst people driving under the influence of alcohol. In the study group there was no evidence of a restricted manner and extent of car use, based on the distances between the sites of the accidents and the offenders' homes. However, the proportion of accidents occurring out of towns was greater in the study group. Alcohol associated accidents occurred more frequently in the evenings and at night, which reflects habitual drinking patterns. Therefore these accidents occurred mainly in darkness and twilight. Surprisingly, unfavorable weather conditions such as rain or ice did not lead to an increase in accidents due to alcohol. In fact, in the study group, proportionally fewer accidents occurred on icy roads. Both injury to persons and damage to property were more severe in the study group. While no relationship between accident severity and blood alcohol concentration could be proven within the study group, the risk of death or severe injury was 3 to 4 times greater in this group than in the control group. PMID:8679133

Erath, D; Haffner, H T

1996-03-01

158

[Occupational accidents in temporary work].  

PubMed

In 2000 in Italy about 470,000 workers found jobs provided by Temporary Work Agencies, i.e., more than twice the number in 1999. Temporary Work is an expanding phenomenon since it well suits the flexibility requirements of business: 77% of Temporary Work is in the manufacturing industry, involving mostly unskilled workers. The young age, low level of qualification, poor training, and lack of knowledge of the working environment are factors that can favour occupational accidents. There are studies that relate the frequency of labour accidents to the level of training and job experience. There are no data in the literature about occupational accidents during temporary work. Our study concerns sixteen temporary work Agencies that employed more than 250,000 manual workers in 2000. From the occupational accident registers of these agencies, we analysed all accidents concerning manual workers employed during 2000, with reference to: the number of accidents with up to three days prognosis, age, sex, nationality, prognosis pattern and cause. The agencies supplied data regarding the number of hours worked during 2000. We considered 5259 accidents: the overall frequency index (FI) was 92.1, with a considerable difference between the three main agencies (87.5) and the others. The mean age accident was 27.8 years, mean duration of sick leave 13.7 days, and the main causes were work tools (51.5%); 76% of the accidents concerned unskilled manual workers. The above indexes are definitely higher than those provided by INAIL (italian compulsory insurances) for the metalworking (38.1), construction (47.7) and mining (58.8) sectors during 1997. There is evidence that temporary work is related to an increased risk of occupational accidents. Further studies are required to confirm this evidence. PMID:11676190

Nola, A; Cattaneo, G; Maiocchi, A; Gariboldi, C; Rocchi, R; Cavallaro, S; Loreto, B; Lanfredini, L; Bassino, P

2001-01-01

159

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

160

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

161

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

162

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

163

[The radiation accident].  

PubMed

The reactor accident of Chernobyl in April 1986 has shown us all the dangers which are inherent ever in the peaceful use of atomic energy. The effects of exposure to ionizing radiation are dependent on biological effectiveness, on dose, on duration of exposure and on the age of the exposed person (the younger the graver). Acute ionizing radiation of the whole body leads to radiation disease or radiation syndrome of different stages of severity according to dosage. If the patient survives other consequences of ionizing radiation may arise: non-stochastic effects such as cataracts, keloid formation, fibrosis of the lungs and infertility) and stochastic effects (oncogenesis and mutagenesis). The sensitivity to ionizing radiation is especially high in childhood because of the high velocity of cell metabolism and cell growth, the large body-surface area and because their repair mechanism following radiation damage is not yet. PMID:3188527

Stögmann, W

1988-08-26

164

Transport aircraft accident dynamics  

NASA Technical Reports Server (NTRS)

A study was carried out of 112 impact survivable jet transport aircraft accidents (world wide) of 27,700 kg (60,000 lb.) aircraft and up extending over the last 20 years. This study centered on the effect of impact and the follow-on events on aircraft structures and was confined to the approach, landing and takeoff segments of the flight. The significant characteristics, frequency of occurrence and the effect on the occupants of the above data base were studied and categorized with a view to establishing typical impact scenarios for use as a basis of verifying the effectiveness of potential safety concepts. Studies were also carried out of related subjects such as: (1) assessment of advanced materials; (2) human tolerance to impact; (3) merit functions for safety concepts; and (4) impact analysis and test methods.

Cominsky, A.

1982-01-01

165

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

166

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

167

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

168

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

169

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

170

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

171

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

172

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

173

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

174

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

175

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

176

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

177

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

178

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

179

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

180

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

181

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

182

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

183

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

184

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

185

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

186

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

187

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

188

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

189

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

190

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

191

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

192

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

193

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

194

A review of criticality accidents  

SciTech Connect

Criticality accidents and the characteristics of prompt power excursions are discussed. Forty-one accidental power transients are reviewed. In each case where available, enough detail is given to help visualize the physical situation, the cause or causes of the accident, the history and characteristics of the transient, the energy release, and the consequences, if any, to personnel and property. Excursions associated with large power reactors are not included in this study, except that some information on the major accident at the Chernobyl reactor in April 1986 is provided in the Appendix. 67 refs., 21 figs., 2 tabs.

Stratton, W R; Smith, D R

1989-03-01

195

Industrial accidents triggered by flood events: analysis of past accidents.  

PubMed

Industrial accidents triggered by natural events (NaTech accidents) are a significant category of industrial accidents. Several specific elements that characterize NaTech events still need to be investigated. In particular, the damage mode of equipment and the specific final scenarios that may take place in NaTech accidents are key elements for the assessment of hazard and risk due to these events. In the present study, data on 272 NaTech events triggered by floods were retrieved from some of the major industrial accident databases. Data on final scenarios highlighted the presence of specific events, as those due to substances reacting with water, and the importance of scenarios involving consequences for the environment. This is mainly due to the contamination of floodwater with the hazardous substances released. The analysis of process equipment damage modes allowed the identification of the expected release extents due to different water impact types during floods. The results obtained were used to generate substance-specific event trees for the quantitative assessment of the consequences of accidents triggered by floods. PMID:19913354

Cozzani, Valerio; Campedel, Michela; Renni, Elisabetta; Krausmann, Elisabeth

2010-03-15

196

A grounded theory model for analysis of marine accidents.  

PubMed

The purpose of this paper was to design a conceptual model for analysis of marine accidents. The model is grounded on large amounts of empirical data, i.e. the Swedish Maritime Administration database, which was thoroughly studied. This database contains marine accidents organized by ship and variable. The majority of variables are non-metric and some have never been analyzed because of the large number of values. Summary statistics were employed in the data analysis. In order to develop a conceptual model, the database variables were clustered into eleven main categories or constructs, which were organized according to their properties and connected with the path diagram of relationships. For demonstration purposes, one non-metric and five metric variables were selected, namely fatality, ship's properties (i.e. age, gross register tonnage, and length), number of people on board, and marine accidents. These were analyzed using the structural equation modeling (SEM) approach. The combined prediction power of the 'ship's properties' and 'number of people on board' independent variables accounted for 65% of the variance of the fatality. The model development was largely based on the data contained in the Swedish database. However, as this database shares a number of variables in common with other databases in the region and the world, the model presented in this paper could be applied to other datasets. The model has both theoretical and practical values. Recommendations for improvements in the database are also suggested. PMID:21545894

Mullai, Arben; Paulsson, Ulf

2011-07-01

197

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

198

49 CFR 837.3 - Published reports, material contained in the public accident investigation dockets, and accident...  

Code of Federal Regulations, 2013 CFR

...accident investigation dockets, and accident database data. 837.3 Section 837.3 ...accident investigation dockets, and accident database data. (a) Demands for material...investigations, or its computerized accident database(s) shall be submitted, in...

2013-10-01

199

Aircraft accidents : method of analysis  

NASA Technical Reports Server (NTRS)

This report on a method of analysis of aircraft accidents has been prepared by a special committee on the nomenclature, subdivision, and classification of aircraft accidents organized by the National Advisory Committee for Aeronautics in response to a request dated February 18, 1928, from the Air Coordination Committee consisting of the Assistant Secretaries for Aeronautics in the Departments of War, Navy, and Commerce. The work was undertaken in recognition of the difficulty of drawing correct conclusions from efforts to analyze and compare reports of aircraft accidents prepared by different organizations using different classifications and definitions. The air coordination committee's request was made "in order that practices used may henceforth conform to a standard and be universally comparable." the purpose of the special committee therefore was to prepare a basis for the classification and comparison of aircraft accidents, both civil and military. (author)

1929-01-01

200

TMI-2 accident evaluation program  

SciTech Connect

This report establishes the basis and scope of work for the Three Mile Island Unit No. 2 (TMI-2) Accident Evaluation Program sponsored by the Department of Energy (DOE). The current understanding of the TMI-2 accident is reviewed, with emphasis on the end-state distribution of important radioisotopes and the progression of core damage leading to gross core failure and fuel migration into the lower plenum regions of the reactor vessel. Unresolved technical issues related to core damage progression and fission product behavior in hypothesized reactor accidents are identified. The role of TMI-2 accident research in addressing these unresolved issues is developed and discussed. Data needs from TMI-2 and supporting analysis requirements to interpret the data are identified that will improve our understanding of the important physical processes and parameters controlling core damage progression and the resulting fission product behavior. 48 refs.

Tolman, E.L.; Broughton, J.M.; McCardell, R.K.; Langer, S.; Hobbins, R.R.; Domenico, W.F.; Davis, P.R.

1986-02-01

201

The TMI2 accident evaluation program  

Microsoft Academic Search

The accident at the Three Mile Island Unit 2 (TMI-2) reactor, now 10 years old, remains as the United States' worst commercial nuclear reactor accident. Although the consequences of the accident were restricted primarily to the plant itself, the potential consequences of the accident, should it have progressed further, are large enough to warrant close scrutiny of all aspects of

D. J. Osetek; J. M. Broughton; R. R. Hobbins

1989-01-01

202

Two-lane traffic simulations with a blockage induced by an accident car  

NASA Astrophysics Data System (ADS)

Based on the two-lane traffic model proposed by Chowdhury et al., a highway traffic model with a blockage induced by an accident car is proposed, in which both symmetric lane changing rules and asymmetric lane changing rules are adopted. The fundamental diagrams and spatial-temporal profiles are presented after the numerical simulation and the jam transition is studied. It is shown that the accident car not only causes a local jam behind the accident car, but also causes vehicles to cluster in the bypass lane. The asymmetric lane changing rules are more advantageous in reducing the local jam than the symmetric lane changing rules when the accident car is in the right lane, and the symmetric lane changing rules are superior when the accident car is in the left lane. Furthermore the curves of lane-changing frequency against the total density are given. It is found that the vehicles will change lane more frequently when traffic is inhomogeneous with different types of vehicle or with an accident car.

Zhu, H. B.; Lei, L.; Dai, S. Q.

2009-07-01

203

An evaluation of spindle-shaft seizure accident sequences for the Schenck Dynamic Balancer  

SciTech Connect

This study was conducted at the request of the USDOE/AL Dynamic Balancer Project Team to develop a set of representative accident sequences initiated by rapid seizure of the spindle shaft of the Schenck dynamic balancing machine used in the mass properties testing activities in Bay 12-60 at the Pantex Plant. This Balancer is used for balancing reentry vehicles. In addition, the study identified potential causes of possible spindle-shaft seizure leading to a rapid deceleration of the rotating assembly. These accident sequences extend to the point that the reentry vehicle either remains in stable condition on the balancing machine or leaves the machine with some translational and rotational motion. Fault-tree analysis was used to identify possible causes of spindle-shaft seizure, and failure modes and effects analysis identified the results of shearing of different machine components. Cause-consequence diagrams were used to help develop accident sequences resulting from the possible effects of spindle-shaft seizure. To make these accident sequences physically reasonable, the analysts used idealized models of the dynamics of rotating masses. Idealized physical modeling also was used to provide approximate values of accident parameters that lead to branching down different accident progression paths. The exacerbating conditions of balancing machine over-speed and improper assembly of the fixture to the face plate are also addressed.

Bott, T.F.; Fischer, S.R.

1998-11-01

204

Spine Immobilizer for Accident Victims  

NASA Technical Reports Server (NTRS)

Proposed conformal bladder filled with tiny spheres called "microballoons," enables spine of accident victim to be rapidly immobilized and restrained and permit victim to be safely removed from accident scene in extremely short time after help arrives. Microballoons expand to form rigid mass when pressure within bladder is less than ambient. Bladder strapped to victim is also strapped to rescue chair. Void between bladder and chair is filled with cloth wedges.

Vykukal, H. C.; Lampson, K.

1983-01-01

205

Recent PCB accidents in Finland.  

PubMed Central

Twenty-eight polychlorinated biphenyl (PCB) accidents were recorded during a 1-year period in Finland. They comprised leaks, fires or explosions of capacitors. Some of the explosions and fires gave rise to high concentrations of PCBs in air and of PCBs and tetrachlorodibenzofurans (TCDFs), including 2,3,7,8-TCDF, on surfaces. One large explosion is described in detail, and biomedical data and findings of this case are compared with those of smaller accidents in Finland.

Elo, O; Vuojolahti, P; Janhunen, H; Rantanen, J

1985-01-01

206

Severe accident analysis using dynamic accident progression event trees  

NASA Astrophysics Data System (ADS)

In present, the development and analysis of Accident Progression Event Trees (APETs) are performed in a manner that is computationally time consuming, difficult to reproduce and also can be phenomenologically inconsistent. One of the principal deficiencies lies in the static nature of conventional APETs. In the conventional event tree techniques, the sequence of events is pre-determined in a fixed order based on the expert judgments. The main objective of this PhD dissertation was to develop a software tool (ADAPT) for automated APET generation using the concept of dynamic event trees. As implied by the name, in dynamic event trees the order and timing of events are determined by the progression of the accident. The tool determines the branching times from a severe accident analysis code based on user specified criteria for branching. It assigns user specified probabilities to every branch, tracks the total branch probability, and truncates branches based on the given pruning/truncation rules to avoid an unmanageable number of scenarios. The function of a dynamic APET developed includes prediction of the conditions, timing, and location of containment failure or bypass leading to the release of radioactive material, and calculation of probabilities of those failures. Thus, scenarios that can potentially lead to early containment failure or bypass, such as through accident induced failure of steam generator tubes, are of particular interest. Also, the work is focused on treatment of uncertainties in severe accident phenomena such as creep rupture of major RCS components, hydrogen burn, containment failure, timing of power recovery, etc. Although the ADAPT methodology (Analysis of Dynamic Accident Progression Trees) could be applied to any severe accident analysis code, in this dissertation the approach is demonstrated by applying it to the MELCOR code [1]. A case study is presented involving station blackout with the loss of auxiliary feedwater system for a pressurized water reactor. The specific plant analyzed is the Zion Nuclear Power Plant, which is a Westinghouse-designed system that has been decommissioned.

Hakobyan, Aram P.

207

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

208

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

209

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

210

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

211

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

212

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.

213

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

214

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

215

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

216

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

217

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

218

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

219

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

220

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

221

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

222

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

223

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

224

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

225

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

226

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

227

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

228

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

229

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

230

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

231

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

232

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

233

The TMI-2 accident evaluation program  

SciTech Connect

The accident at the Three Mile Island Unit 2 (TMI-2) reactor, now 10 years old, remains as the United States' worst commercial nuclear reactor accident. Although the consequences of the accident were restricted primarily to the plant itself, the potential consequences of the accident, should it have progressed further, are large enough to warrant close scrutiny of all aspects of the event. TMI-2 accident research is being conducted by the US Department of Energy (DOE) to provide the basis for more accurate calculations of source terms for postulated severe accidents. Research objectives supporting this goal include developing a comprehensive and consistent understanding of the mechanisms that controlled the progression of core damage and subsequent fission product behavior during the TMI-2 accident, and applying that understanding to the resolution of important severe accident safety issues. Developing a best-estimate scenario of the core melt progression during the accident is the focal point of the research and involves analytical work to interpret and integrate: (1) data recorded during the accident from plant instrumentation, (2) the post-accident state of the core, (3) results of the examination of material from the damaged core, and (4) related severe-accident research results. This paper summarizes the TMI-2 Accident Evaluation Program that is being conducted for the USDOE and briefly describes the important results that have been achieved. The Program is divided into four parts: Sample Acquisition and Plant Examination, Accident Scenario, Standard Problem Exercise, and Information and Industry Coordination.

Osetek, D.J.; Broughton, J.M.; Hobbins, R.R.

1989-01-01

234

A CANDU Severe Accident Analysis  

SciTech Connect

As interest in severe accident studies has increased in the last years, we have developed a set of simple models to analyze severe accidents for CANDU reactors that should be integrated in the EU codes. The CANDU600 reactor uses natural uranium fuel and heavy water (D2O) as both moderator and coolant, with the moderator and coolant in separate systems. We chose to analyze accident development for a LOCA with simultaneous loss of moderator cooling and the loss of emergency core cooling system (ECCS). This type of accident is likely to modify the reactor geometry and will lead to a severe accident development. When the coolant temperatures inside a pressure tube reaches 10000 deg C, a contact between pressure tube and calandria tube occurs and the residual heat is transferred to the moderator. Due to the lack of cooling, the moderator eventually begins to boil and is expelled, through the calandria vessel relief ducts, into the containment. Therefore the calandria tubes (fuel channels) will be uncovered, then will disintegrate and fall down to the calandria vessel bottom. After all the quantity of moderator is vaporized and expelled, the debris will heat up and eventually boil. The heat accumulated in the molten debris will be transferred through the calandria vessel wall to the shield tank water, which normally surrounds the calandria vessel. The phenomena described above are modelled, analyzed and compared with the existing data. The results are encouraging. (authors)

Negut, Gheorghe; Catana, Alexandru [Institute for Nuclear Research, 1, Compului Str., Mioveni, PO Box 78, 0300 Pitesti (Romania); Prisecaru, Ilie [University Politehnica Bucharest (Romania)

2006-07-01

235

State-transition diagrams for biologists.  

PubMed

It is clearly in the tradition of biologists to conceptualize the dynamical evolution of biological systems in terms of state-transitions of biological objects. This paper is mainly concerned with (but obviously not limited too) the immunological branch of biology and shows how the adoption of UML (Unified Modeling Language) state-transition diagrams can ease the modeling, the understanding, the coding, the manipulation or the documentation of population-based immune software model generally defined as a set of ordinary differential equations (ODE), describing the evolution in time of populations of various biological objects. Moreover, that same UML adoption naturally entails a far from negligible representational economy since one graphical item of the diagram might have to be repeated in various places of the mathematical model. First, the main graphical elements of the UML state-transition diagram and how they can be mapped onto a corresponding ODE mathematical model are presented. Then, two already published immune models of thymocyte behavior and time evolution in the thymus, the first one originally conceived as an ODE population-based model whereas the second one as an agent-based one, are refactored and expressed in a state-transition form so as to make them much easier to understand and their respective code easier to access, to modify and run. As an illustrative proof, for any immunologist, it should be possible to understand faithfully enough what the two software models are supposed to reproduce and how they execute with no need to plunge into the Java or Fortran lines. PMID:22844438

Bersini, Hugues; Klatzmann, David; Six, Adrien; Thomas-Vaslin, Véronique

2012-01-01

236

State-Transition Diagrams for Biologists  

PubMed Central

It is clearly in the tradition of biologists to conceptualize the dynamical evolution of biological systems in terms of state-transitions of biological objects. This paper is mainly concerned with (but obviously not limited too) the immunological branch of biology and shows how the adoption of UML (Unified Modeling Language) state-transition diagrams can ease the modeling, the understanding, the coding, the manipulation or the documentation of population-based immune software model generally defined as a set of ordinary differential equations (ODE), describing the evolution in time of populations of various biological objects. Moreover, that same UML adoption naturally entails a far from negligible representational economy since one graphical item of the diagram might have to be repeated in various places of the mathematical model. First, the main graphical elements of the UML state-transition diagram and how they can be mapped onto a corresponding ODE mathematical model are presented. Then, two already published immune models of thymocyte behavior and time evolution in the thymus, the first one originally conceived as an ODE population-based model whereas the second one as an agent-based one, are refactored and expressed in a state-transition form so as to make them much easier to understand and their respective code easier to access, to modify and run. As an illustrative proof, for any immunologist, it should be possible to understand faithfully enough what the two software models are supposed to reproduce and how they execute with no need to plunge into the Java or Fortran lines.

Bersini, Hugues; Klatzmann, David; Six, Adrien; Thomas-Vaslin, Veronique

2012-01-01

237

Investigation of the Challenger Accident  

NASA Technical Reports Server (NTRS)

The work of the Presidential Commission on the Space Shuttle Challenger Accident (hereafter referred to as the Rogers Commission) and the work of the National Aeronautics and Space Administration in investigating the causes of the accident were reviewed. In addition to reviewing the five volumes of the Rogers Commission, the entire direct on-line Rogers Commission data base, which included full-text and document retrieval capability was also reviewed. The findings and recommendations contained also include materials submitted for the record, staff investigations, interviews, and trips.

1986-01-01

238

Aircraft accident construction set: performance engineering applied to accident reconstruction  

NASA Astrophysics Data System (ADS)

For some time aircraft accident investigation has been a reverse engineering procedure. Failure analysis has taken a strict engineering approach, disregarding many of the alternatives relating to cause. As aircraft become automated, many relating factors will need to be considered in order to build an accurate reconstruction of an accident. The Aircraft Accident Construction Set will provide the investigator with the opportunity to investigate 'What if?' questions relating to causal factors. The system addressed both the vehicle and the human elements of performance. Significant integration of engineering principles and human factors probability data enhance the outcomes assessment. The pictorial display provides a near real- time image of the vehicle as supported by the engineering data, rather than the more traditional approach of line graphs and interpolative tables. This enables the investigator to consider far more data at a given time than in the past. Interaction between the workstation and the investigator is through a menu system derived from data tables and displayed as ICON symbology. Relational database operations and a user toolbox round out the system. Presentation of this system will provide a fundamental understanding of the capabilities of the system, and an actual air carrier accident will be examined briefly.

Blanchard, James W.

1992-06-01

239

Urban Cluster Layout Based on Voronoi Diagram  

NASA Astrophysics Data System (ADS)

The optimum layout of urban system is one of important contents in urban planning. To make regional urban system planning more suitable to the requirements of urbanization development, this paper tests a quantitative method based on GIS & Voronoi diagram. Its workflows include calculating city competitiveness data, spreading the city competitiveness analysis by aid of spatial analysis and data mining functions in GIS, getting the structural characteristics of urban system, and proposing the corresponding optimum scheme of the allocation. This method is tested using the data collected from Shandong Province, China.

Xinqi, Zheng; Shuqing, Wang; Meichen, Fu; Lu, Zhao; Shujia, Yang

240

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

241

Acceptance diagrams for curved neutron guides  

NASA Astrophysics Data System (ADS)

The method of acceptance diagrams is used to obtain analytic expressions for the intensity and spatial and angular distributions of the neutrons transmitted along a one-dimensional curved guide, provided that the length of the guide is greater than the minimum length necessary to eliminate direct radiation. The acceptance area for curved guides is parabolic in shape, and shows the asymmetry in the spatial distribution of the transmitted neutrons. From these formulations the average number of reflections can be determined as a function of wavelength.

Mildner, D. F. R.

1990-05-01

242

The Astronomer's H-R diagram  

NASA Astrophysics Data System (ADS)

Most people who've taken an astronomy course are familiar with the Hertzsprung-Russell diagram. It was developed to show the relationships between the temperature (or colour) of a star and its luminosity. Following this premise and an original idea by Stuart Lowe, we asked ourselves if american astronomer as a group have a "Main Career Sequence" in the space of Peer Reviewed papers and "absolute" Google index. Here we expand on Stuart's original idea examining several cuts in publication and Google parameter space with the help of proper ADS data

Conti, Alberto; Lowe, S.; Accomazzi, A.; Di Milia, G.

2011-01-01

243

76 FR 63654 - Outer Continental Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer...  

Federal Register 2010, 2011, 2012, 2013

...Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer Continental...Official Protraction Diagram (OPD), Lease Maps, and Supplemental Official OCS Block Diagrams...OCS Official Protraction Diagram, Lease Maps, and Supplemental Official OCS Shelf...

2011-10-13

244

76 FR 2919 - Outer Continental Shelf Official Protraction Diagram and Supplemental Official Outer Continental...  

Federal Register 2010, 2011, 2012, 2013

...Supplemental Official Outer Continental Shelf Block Diagrams AGENCY: Bureau of Ocean Energy...Supplemental Official Outer Continental Shelf Block Diagrams...Diagram (OPD) and Supplemental Official OCS Block Diagrams (SOBDs) located in the...

2011-01-18

245

Effects of quenched randomness induced by car accidents on traffic flow in a cellular automata model  

NASA Astrophysics Data System (ADS)

In this paper we numerically study the impact of quenched disorder induced by car accidents on traffic flow in the Nagel-Schreckenberg (NS) model. Car accidents occur when the necessary conditions proposed by [Boccara J. Phys. A 30, 3329 (1997)] are satisfied. Two realistic situations of cars involved in car accidents have been considered. Model A is presented to consider that the accident cars become temporarily stuck. Our studies exhibit the “inverse- ? form” or the metastable state for traffic flow in the fundamental diagram and wide-moving waves of jams in the space-time pattern. Model B is proposed to take into account that the “wrecked” cars stay there forever and the cars behind will pass through the sites occupied by the “wrecked” cars with a transmission rate. Four-stage transitions from a maximum flow through a sharp decrease phase and a density-independent phase to a high-density jamming phase for traffic flow have been observed. The density profiles and the effects of transmission rate and probability of the occurrence of car accidents in model B are also discussed.

Yang, Xian-Qing; Ma, Yu-Qiang; Zhao, Yue-Min

2004-10-01

246

Type Airman Certification as Related to Accidents.  

National Technical Information Service (NTIS)

An analysis of 1964 aircraft accidents, using type of airman certificate as a measure of pilot proficiency, is presented. Data show that student pilots generally have a better accident record than any other of the certification groups. Analysis confirmed ...

E. J. Veregge

1967-01-01

247

Instability Regions in the Upper HR Diagram  

NASA Technical Reports Server (NTRS)

The following instability regions for blueward evolving supergiants are outlined and compared: (1) Areas in the Hertzsprung-Russell(HR) diagram where stars are dynamically unstable. (2) Areas where the effective acceleration in the upper part of the photospheres is negative, hence directed outward. (3) Areas where the sonic points of the stellar wind (Where wind velocity = sound velocity) are situated inside the photospheres, at a level deeper than tau(sub Ross) = 0.01. We compare the results with the positions of actual stars in the HR diagram and we find evidence that the recent strong contraction of the yellow hypergiant HR8752 was initiated in a period during which (g(sub eff)) is less than 0, whereupon the star became dynamically unstable. The instability and extreme shells around IRC+10420 are suggested to be related to three factors: (g(sub eff)) is less than 0; the sonic point is situated inside the photosphere; and the star is dynamically unstable.

deJager, Cornelis; Lobel, Alex; Nieuwenhuijzen, Hans; Stothers, Richard; Hansen, James E. (Technical Monitor)

2001-01-01

248

Critical point analysis of phase envelope diagram  

NASA Astrophysics Data System (ADS)

Phase diagram or phase envelope is a relation between temperature and pressure that shows the condition of equilibria between the different phases of chemical compounds, mixture of compounds, and solutions. Phase diagram is an important issue in chemical thermodynamics and hydrocarbon reservoir. It is very useful for process simulation, hydrocarbon reactor design, and petroleum engineering studies. It is constructed from the bubble line, dew line, and critical point. Bubble line and dew line are composed of bubble points and dew points, respectively. Bubble point is the first point at which the gas is formed when a liquid is heated. Meanwhile, dew point is the first point where the liquid is formed when the gas is cooled. Critical point is the point where all of the properties of gases and liquids are equal, such as temperature, pressure, amount of substance, and others. Critical point is very useful in fuel processing and dissolution of certain chemicals. Here in this paper, we will show the critical point analytically. Then, it will be compared with numerical calculations of Peng-Robinson equation by using Newton-Raphson method. As case studies, several hydrocarbon mixtures are simulated using by Matlab.

Soetikno, Darmadi; Kusdiantara, Rudy; Puspita, Dila; Sidarto, Kuntjoro A.; Siagian, Ucok W. R.; Soewono, Edy; Gunawan, Agus Y.

2014-03-01

249

Recent Results in Ring-Diagram Analysis  

NASA Astrophysics Data System (ADS)

The ring-diagram technique was developed by Frank Hill 25 years ago and matured quickly during the late 1990s. It is nowadays one of the most commonly used techniques in local helioseismology. The method consists in the power spectral analysis of solar acoustic oscillations on small regions (2° to 30°) of the solar surface. The power spectrum resembles a set of trumpets nested inside each other and for a given frequency, it looks like a ring, hence the technique's name. It provides information on the horizontal flow field and thermodynamic structure in the layers immediately below the photosphere. With data regularly provided by MDI, GONG, and more recently HMI, many important results have been achieved. In recently years, these results include estimations of the meridional circulation and its evolution with solar cycle; flows associated with active regions, as well as, flow divergence and vorticity, and thermal structure beneath and around active regions. Much progress is expected with data now provided by HMI's high spatial resolution observations and high duty cycle. There are two data processing pipelines (GONG and HMI) providing free access to the data and the results of the ring-diagram analysis. Here we will discuss the most recent results and improvements in the technique, as well as, the many challenges that still remain.

Rabello-Soares, M. C.

2013-12-01

250

Colour Magnitude Diagrams of Transiting Exoplanets  

NASA Astrophysics Data System (ADS)

Colour-Magnitude diagrams form a traditional way of representing luminous objects in the Universe and compare them to each others. Here, the photometric distances of 44 transiting exoplanetary systems were estimated. For seven of those, parallaxes confirm the methodology. From the combination of those measurements with fluxes obtained while planets were occulted by their host stars, colour-magnitude diagrams are composed in the near and mid IR. When possible, planets are plotted with field brown dwarfs who often have similar sizes and equilibrium temperatures, thus offering a natural empirical comparison sample. Exoplanets are also compared to the expected loci of pure blackbodies. In general planets do not agree with the brown dwarfs sequences, and neither do they match blackbodies. It is however possible to affirm that they are not featureless and that they display an increasing diversity in colour with decreasing intrinsic luminosity. A missing source of absorption within the [4.5 ?m] band, for some planets, would generally reconcile hot Jupiters with brown dwarfs’ cool atmospheres. Alternatively, measuring the emission of gas giants cooler than 1 000 K would disentangle whether planets’ atmospheres behave like brown dwarfs’ atmospheres, like blackbodies, or whether they form their own sequence.

Triaud, Amaury H. M. J.

2014-06-01

251

Isolated pulsar spin evolution on the diagram  

NASA Astrophysics Data System (ADS)

We look at two contrasting spin-down models for isolated radio pulsars and, accounting for selection effects, synthesize observable populations. While our goal is to reproduce all of the observable characteristics, in this paper we pay particular attention to the form of the spin period versus period derivative () diagram and its dependence on various pulsar properties. We analyse the initial spin period, the braking index, the magnetic field, various beaming models as well as the pulsar's luminosity. In addition to considering the standard magnetic dipole model for pulsar spin-down, we also consider the recent hybrid model proposed by Contopoulos and Spitkovsky. The magnetic dipole model, however, does a better job of reproducing the observed pulsar population. We conclude that random alignment angles and period-dependent luminosity distributions are essential to reproduce the observed diagram. We also consider the time decay of alignment angles and attempt to reconcile various models currently being studied. We conclude that in order to account for recent evidence for the alignment found by Weltevrede and Johnston, the braking torque on a neutron star should not depend strongly on the inclination. Our simulation code is publicly available and includes a web-based interface to examine the results and make predictions for yields of current and future surveys.

Ridley, J. P.; Lorimer, D. R.

2010-05-01

252

Revisiting the phase diagram of hard ellipsoids.  

PubMed

In this work, the well-known Frenkel-Mulder phase diagram of hard ellipsoids of revolution [D. Frenkel and B. M. Mulder, Mol. Phys. 55, 1171 (1985)] is revisited by means of replica exchange Monte Carlo simulations. The method provides good sampling of dense systems and so, solid phases can be accessed without the need of imposing a given structure. At high densities, we found plastic solids and fcc-like crystals for semi-spherical ellipsoids (prolates and oblates), and SM2 structures [P. Pfleiderer and T. Schilling, Phys. Rev. E 75, 020402 (2007)] for x : 1-prolates and 1 : x-oblates with x ? 3. The revised fluid-crystal and isotropic-nematic transitions reasonably agree with those presented in the Frenkel-Mulder diagram. An interesting result is that, for small system sizes (100 particles), we obtained 2:1- and 1.5:1-prolate equations of state without transitions, while some order is developed at large densities. Furthermore, the symmetric oblate cases are also reluctant to form ordered phases. PMID:22482570

Odriozola, Gerardo

2012-04-01

253

Aircraft Accidents by Older Persons.  

National Technical Information Service (NTIS)

During 1965 there were 450,494 certificated general aviation pilots in the United States, of which 9,826 were over sixty years old. Within this group there were 108 accidents, 17 of which were fatal. Statistical analysis (chi square) revealed that these o...

S. R. Mohler R. H. S. Bedell A. Ross E. J. Veregge

1967-01-01

254

Notes on Road Accident Statistics.  

National Technical Information Service (NTIS)

The Road Research Laboratory has organised courses in traffic and safety for the benefit of police officers and highway engineerings for a number of years. The notes for one of the lectures, dealing with accident statistics form the basis of the report. I...

H. D. Johnson F. Garwood

1971-01-01

255

Road Accident Facts 1984, Ireland.  

National Technical Information Service (NTIS)

The report gives detailed classifications of accidents on Irish Roads reported to the Garda Siochana in 1984. Some comment is also given on the interpretation of the classifications. In a number of the more detailed tables which are included in the report...

1984-01-01

256

Road Accident Tabulation Language (Rattle).  

National Technical Information Service (NTIS)

A suite of programs has been written for ICL System 4 computers to enable tabular reports from the annual road accident statistics files to be extracted with a minimum of effort. Requests for analysis are written in the form of simple language statements ...

P. Harris

1971-01-01

257

Assessment of Severe Accident Risks  

Microsoft Academic Search

\\u000a This chapter deals with the Risk Assessment Task within CETP. This task addressed the comparative assessment of accidents\\u000a risks associated with the various electricity supply options. The full account of the work carried out within this task is\\u000a provided in the technical report (Hirschberg et al., 2003a).

Stefan Hirschberg; Peter Burgherr; Gerard Spiekerman; Erik Cazzoli; Jirina Vitazek; Lulian Cheng

258

The Physics of Traffic Accidents  

ERIC Educational Resources Information Center

Shows how physics can be used to analyze and prevent traffic accidents by determining critical speeds on curves, the behavior of motor cycles and stability of articulated vehicles, and the visibility that is needed to make a minor road junction safe. (MLH)

Knight, Peter

1975-01-01

259

The Diagram as Story: Unfolding the Event-Structure of the Mathematical Diagram  

ERIC Educational Resources Information Center

This paper explores the role of narrative in decoding diagrams. I focus on two fundamental facets of narrative: (1) the recounting of causally related sequences of events, and (2) the positioning of the narrator through point-of-view and voice. In the first two sections of the paper I discuss philosophical and semiotic frameworks for making sense…

de Freitas, Elizabeth

2012-01-01

260

Learning from Accident Analysis: The Dynamics Leading Up to a Rafting Accident.  

ERIC Educational Resources Information Center

Analysis of a case study of a whitewater rafting accident reveals that such accidents tend to result from multiple actions. Many events leading up to such accidents include procedural and process factors, suggesting that hard-skills technical training is an insufficient approach to accident prevention. Contains 26 references. (SAS)

Hovelynck, Johan

1998-01-01

261

Development of a new chemical process-industry accident database to assist in past accident analysis  

Microsoft Academic Search

Past accident analysis (PAA) is one of the most potent and oft-used exercises for gaining insights into the reasons why accidents occur in chemical process industry (CPI) and the damage they cause. PAA provides invaluable ‘wisdom of hindsight’ with which strategies to prevent accidents or cushion the impact of inevitable accidents can be developed.A number of databases maintain record of

S. M. Tauseef; Tasneem Abbasi; S. A. Abbasi

2011-01-01

262

A model of fishing vessel accident probability  

Microsoft Academic Search

Problem: Commercial fishing is one of the least safe occupations. Method: The researchers develop a fishing vessel accident probability model for fishing areas off the northeastern United States using logit regression and daily data from 1981 to 1993. Results: The results indicate that fishing vessel accident probability declined over the study period. Higher wind speed is associated with greater accident

Di Jin; Hauke L. Kite-Powell; Eric Thunberg; Andrew R. Solow; Wayne K. Talley

2002-01-01

263

NASA Medical Response to Human Spacecraft Accidents  

NASA Technical Reports Server (NTRS)

Manned space flight is risky business. Accidents have occurred and may occur in the future. NASA's manned space flight programs, with all their successes, have had three fatal accidents, one at the launch pad and two in flight. The Apollo fire and the Challenger and Columbia accidents resulted in a loss of seventeen crewmembers. Russia's manned space flight programs have had three fatal accidents, one ground-based and two in flight. These accidents resulted in the loss of five crewmembers. Additionally, manned spacecraft have encountered numerous close calls with potential for disaster. The NASA Johnson Space Center Flight Safety Office has documented more than 70 spacecraft incidents, many of which could have become serious accidents. At the Johnson Space Center (JSC), medical contingency personnel are assigned to a Mishap Investigation Team. The team deploys to the accident site to gather and preserve evidence for the Accident Investigation Board. The JSC Medical Operations Branch has developed a flight surgeon accident response training class to capture the lessons learned from the Columbia accident. This presentation will address the NASA Mishap Investigation Team's medical objectives, planned response, and potential issues that could arise subsequent to a manned spacecraft accident. Educational Objectives are to understand the medical objectives and issues confronting the Mishap Investigation Team medical personnel subsequent to a human space flight accident.

Patlach, Robert

2010-01-01

264

Study of severe accident mitigation systems  

Microsoft Academic Search

This study has been performed as part of the Severe Accident Risk Reduction Program (SARRP) to investigate the feasibility and costs of installing various systems designed to mitigate the effects of severe accidents in light water reactors (LWRs). The primary function of the systems is to maintain the integrity of the reactor containment in the event of a severe accident

R. Cherdack; C. Hess; K. Lee; D. Miller

1987-01-01

265

Profile of an Accident Flying Squad  

PubMed Central

An analysis of 184 accident flying squad calls and of 280 patients injured in road accidents and treated by a flying squad based on an accident department inclusive from 1967 to 1971 has shown that such a service can provide an efficient system without disrupting the routine work of the hospital.

Little, Keith

1972-01-01

266

Road Accident Recording Systems in Southern Africa.  

National Technical Information Service (NTIS)

The report contains a review of present road accident recording system in the SADCC-countries and recommends a new, improved road accident recording system. It is recommended to report each individual accident to a central unit which prepares and compiles...

T. Vaaje

1987-01-01

267

School Bus Accidents and Driver Age.  

ERIC Educational Resources Information Center

The study examines the rates and types of school bus accidents according to the age of the school bus driver. Accident rates in North Carolina for the school year 1971-72 were analyzed using three sources of data: accident reports, driver and mileage data, and questionnaires administered to a sample of school bus drivers. Data were obtained on…

McMichael, Judith

268

On Linear-Sized Farthest-Color Voronoi Diagrams  

NASA Astrophysics Data System (ADS)

Given a collection of k sets consisting of a total of n points in the plane, the distance from any point in the plane to each of the sets is defined to be the minimum among distances to each point in the set. The farthest-color Voronoi diagram is defined as a generalized Voronoi diagram of the k sets with respect to the distance functions for each of the k sets. The combinatorial complexity of the diagram is known to be ?(kn) in the worst case. This paper initiates a study on farthest-color Voronoi diagrams having O(n) complexity. We introduce a realistic model, which defines a certain class of the diagrams with desirable geometric properties observed. We finally show that the farthest-color Voronoi diagrams under the model have linear complexity.

Bae, Sang Won

269

Multi-input\\/multi-output block diagram grammar  

Microsoft Academic Search

A multi-input\\/multi-output block diagram grammar for a block diagram with multiple inputs and\\/or multiple outputs is formalized in terms of a context-sensitive graph grammar. This grammar is defined by adding to the single-input, single-output block diagram grammar we proposed previously dummy nodes and new productions for dealing with multiple inputs and\\/or multiple outputs. A parser based on the multi-input\\/multi-output block

Yoshihiro Adachi; Suguru Kobayashi; Kensei Tsuchida

1998-01-01

270

Formalization of the data flow diagram rules for consistency check  

Microsoft Academic Search

In system development life cycle (SDLC), a system model can be developed\\u000ausing Data Flow Diagram (DFD). DFD is graphical diagrams for specifying,\\u000aconstructing and visualizing the model of a system. DFD is used in defining the\\u000arequirements in a graphical view. In this paper, we focus on DFD and its rules\\u000afor drawing and defining the diagrams. We then

Rosziati Ibrahim; Siow Yen yen

2010-01-01

271

Semantics-Based Weaving of UML Sequence Diagrams  

Microsoft Academic Search

In this paper we briefly introduce an aspect language that can define cross-cutting effects on a set of UML 2.0 sequence diagrams.\\u000a Our main contribution is to weave aspects and sequence diagrams at the model level. By basing the weaving upon a formal trace\\u000a model for sequence diagrams, we ensure that the weaving is semantics-based. To avoid the intractability of

Roy Grønmo; Fredrik Sørensen; Birger Møller-pedersen; Stein Krogdahl

2008-01-01

272

Single pilot IFR accident data analysis  

NASA Technical Reports Server (NTRS)

The aircraft accident data recorded by the National Transportation and Safety Board (NTSR) for 1964-1979 were analyzed to determine what problems exist in the general aviation (GA) single pilot instrument flight rule (SPIFR) environment. A previous study conducted in 1978 for the years 1964-1975 provided a basis for comparison. This effort was generally limited to SPIFR pilot error landing phase accidents but includes some SPIFR takeoff and enroute accident analysis as well as some dual pilot IFR accident analysis for comparison. Analysis was performed for 554 accidents of which 39% (216) occurred during the years 1976-1979.

Harris, D. F.

1983-01-01

273

Perturbation theory without diagrams: the polaron case.  

PubMed

Higher-order perturbative calculations in quantum (field) theory suffer from the factorial increase of the number of individual diagrams. Here I describe an approach which evaluates the total contribution numerically for finite temperature from the cumulant expansion of the corresponding observable followed by an extrapolation to zero temperature. This method (originally proposed by Bogolyubov and Plechko) is applied to the calculation of higher-order terms for the ground-state energy of the polaron. Using state-of-the-art multidimensional integration routines two new coefficients are obtained corresponding to a four- and five-loop calculation. Several analytical and numerical procedures have been implemented which were crucial for obtaining reliable results. PMID:19257164

Rosenfelder, R

2009-01-01

274

Analysis of Japanese banks’ historical tree diagram  

NASA Astrophysics Data System (ADS)

By using the historical data from the Japanese banks’ database at “The Bankers Library” of Japanese Banker Association, we analyze the historical network of banks from 1868 to 2006. Firstly, we define a bank every year by a particle and draw a space-time evolution process of merger, division, establishment, and failure by a tree diagram structure. We found that the distribution of the tree basin size of real data and simulation result are mostly fitting well. Secondly, we analyze the raw data of financial statements of banks collected by the National Diet library. We confirm that the distributions of the amount of deposits have fat-tail every year, however, small deviations are observed relating to governmental policy.

Ueno, Hiromichi; Mizuno, Takayuki; Takayasu, Misako

2007-09-01

275

Phase diagram of chirally imbalanced QCD matter  

SciTech Connect

We compute the QCD phase diagram in the plane of the chiral chemical potential and temperature using the linear sigma model coupled to quarks and to the Polyakov loop. The chiral chemical potential accounts for effects of imbalanced chirality due to QCD sphaleron transitions which may emerge in heavy-ion collisions. We found three effects caused by the chiral chemical potential: the imbalanced chirality (i) tightens the link between deconfinement and chiral phase transitions; (ii) lowers the common critical temperature; (iii) strengthens the order of the phase transition by converting the crossover into the strong first order phase transition passing via the second order end point. Since the fermionic determinant with the chiral chemical potential has no sign problem, the chirally imbalanced QCD matter can be studied in numerical lattice simulations.

Chernodub, M. N. [CNRS, Laboratoire de Mathematiques et Physique Theorique, Universite Francois-Rabelais Tours, Federation Denis Poisson, Parc de Grandmont, Tours, 37200 (France); Department of Physics and Astronomy, University of Gent, Krijgslaan 281, S9, B-9000 Gent (Belgium); Nedelin, A. S. [Department of Physics and Astronomy, Uppsala University, P. O. Box 803, Uppsala, S-75108 (Sweden); Institute for Theoretical and Experimental Physics, B. Cheremushkinskaya 25, Moscow (Russian Federation)

2011-05-15

276

Calculation of multicomponent ceramic phase diagrams  

NASA Astrophysics Data System (ADS)

A data base is being developed for calculation of quasi-binary and quasi-ternary phase diagrams of ceramic systems. Previous segments of this base cover combinations of Cr 2O 3, MgO, Al 2O 3, SiO 2, CaO, Si 3N 4, AlN, BeO, Y 2O 3 and Ce 2O 3. Lattice stability, solution and compound phase parameters have been derived covering the liquid, spinel, corundum, periclase, crystobalite, tridymite, quartz, hexagonal and beta prime phases which appear in the binary systems composed of pairs of these compounds. Compound phases formed from specific binary combinations of these compounds (i.e. MgO·Cr 2O 3) have been characterized. This description is based on observed thermochemistry and phase diagrams for the binary systems of interest. Selected ternary systems have been computed using the foregoing data base for comparison with experimental sections in order to illustrate the usefulness of the data base. To date, 66 quasi-binary and 19 quasi-ternary systems have been calculated. The most recent set of papers extend the base to cover GeO 2, HfO 2, ZrO 2 and TiO 2. The components are the particular interest in recent developments of structural high temperature ceramics and applications requiring unusual toughness. The current work deals with four quasi-binary systems and four quasi-ternary systems which have been calculated over a wide range of temperatures. These samples demonstrate the capability of the data base and computational model for dealing with phase equilibria in multicomponent oxide systems over a wide range of conditions and compositions of practical interest.

Kaufman, Larry

1988-05-01

277

An improved Voronoi diagram model based on fuzzy interval theory  

NASA Astrophysics Data System (ADS)

Considering that the application of traditional Voronoi diagram in spatial division ignores the impact of road hierarchy, speed, road-block, one-way and some other influential factors on proximity, an improved Voronoi diagram model based on fuzzy interval theory is proposed in this paper by introducing different influential factors into the construction of Voronoi diagram in order to enhance the accuracy of spatial division and to meet application requirements. The idea of our improved Voronoi diagram model can be summarized as follows: Firstly, initial Voronoi diagram is built via point by point insertion algorithm. Secondly, fuzzy interval on all Voronoi edges is generated via geometric algorithm and is further used to represent each edge of Voronoi polygons. The size of fuzzy interval is determined by taking all influential factors into consideration. Thirdly, an improved Voronoi diagram with fuzzy boundaries is provided in which the proximity relationships between points in the fuzzy interval and the sites of Voronoi polygons which own a public edge are all proposed to be the nearest. Finally, the validity and performance of our improved Voronoi diagram is demonstrated through a typical application in emergency response system, in which the actual path distance is acted as influential factor. Experimental results show that with our improved Voronoi diagram optimal attendance station can be localized quickly and emergency response efficiency can be enhanced obviously. Besides, classification accuracy can be increased more than 20% compared with traditional Voronoi diagram.

Yan, Beibei; Shao, Zhenfeng; Zhou, Yang; Cheng, Qimin

2009-10-01

278

Visualization design and verification of Ada tasking using timing diagrams  

NASA Technical Reports Server (NTRS)

The use of timing diagrams is recommended in the design and testing of multi-task Ada programs. By displaying the task states vs. time, timing diagrams can portray the simultaneous threads of data flow and control which characterize tasking programs. This description of the system's dynamic behavior from conception to testing is a necessary adjunct to other graphical techniques, such as structure charts, which essentially give a static view of the system. A series of steps is recommended which incorporates timing diagrams into the design process. Finally, a description is provided of a prototype Ada Execution Analyzer (AEA) which automates the production of timing diagrams from VAX/Ada debugger output.

Vidale, R. F.; Szulewski, P. A.; Weiss, J. B.

1986-01-01

279

55. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ...  

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

55. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ONE COMPLETE CYCLE - Kennecott Copper Corporation, On Copper River & Northwestern Railroad, Kennicott, Valdez-Cordova Census Area, AK

280

54. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ...  

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

54. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ONE COMPLETE CYCLE - Kennecott Copper Corporation, On Copper River & Northwestern Railroad, Kennicott, Valdez-Cordova Census Area, AK

281

53. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ...  

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

53. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ONE COMPLETE CYCLE - Kennecott Copper Corporation, On Copper River & Northwestern Railroad, Kennicott, Valdez-Cordova Census Area, AK

282

TIME-TEMPERATURE-TRANSFORMATION DIAGRAMS FOR THE SLUDGE BATCH 3 - FRIT 418 GLASS SYSTEM  

SciTech Connect

As a part of the Waste Acceptance Product Specifications (WAPS) for Vitrified High-Level Waste Forms defined by the Department of Energy - Office of Environmental Management, the phase stability must be determined for each of the projected high-level waste (HLW) types at the Savannah River Site (SRS). Specifically, WAPS 1.4.1 requires the glass transition temperature (Tg) to be defined and time-temperature-transformation (TTT) diagrams to be developed. The Tg of a glass is an indicator of the approximate temperature where the supercooled liquid converts to a solid on cooling or conversely, where the solid begins to behave as a viscoelastic solid on heating. A TTT diagram identifies the crystalline phases that can form as a function of time and temperature for a given waste type or more specifically, the borosilicate glass waste form. In order to assess durability, the Product Consistency Test (PCT) was used and the durability results compared to the Environmental Assessment (EA) glass. The measurement of glass transition temperature and the development of TTT diagrams have already been performed for the seven Defense Waste Processing Facility (DWPF) projected compositions as defined in the Waste Form Compliance Plan (WCP). These measurements were performed before DWPF start-up and the results were incorporated in Volume 7 of the Waste Form Qualification Report (WQR). Additional information exists for other projected compositions, but overall these compositions did not consider some of the processing scenarios now envisioned for DWPF to accelerate throughput. Changes in DWPF processing strategy have required this WAPS specification to be revisited to ensure that the resulting phases have been bounded. Frit 418 was primarily used to process HLW Sludge Batch 3 (SB3) at 38% waste loading (WL) through the DWPF. The Savannah River National Laboratory (SRNL) fabricated a cache of glass from reagent grade oxides to simulate the SB3-Frit 418 system at a 38 wt % WL for glass transition temperature measurement and TTT diagram development. The glass transition temperature (Tg) was measured using differential scanning calorimetry (DSC) and was recorded to be 443 {+-} 3 C. Using the previous TTT diagrams as guidance, subsamples of the glass were isothermally heat treated for 0.5 to 768 hours at temperatures between 400 C to 1100 C. Each of the 56 heat treated samples, along with quenched and centerline canister cooled (CCC) treated samples, were analyzed using Xray diffraction (XRD) and the PCT. Crystallization was detected only in samples treated at 600 C for more than 192 hours, and 700, 800, and 900 C for more than 48 hours. Phases crystallized were similar in composition if not the same as those found in the previous TTT studies. Six different crystalline phases were detected, including nepheline, acmite, lithium silicate, trevorite, krinovite, and albite. Overall, phases were spinel (iron) based, lithium metasilicate, sodium aluminosilicate or sodium transition metal silicate in composition. No new crystalline families were detected. Durability, as measured by the PCT, decreased when lithium silicate or nepheline crystals were present. Only one heat treated sample had a measured PCT response exceeding the benchmark EA glass, which was a sample treated at 600 C for 768 hours. During normal processing at the DWPF these conditions would be highly unlikely to occur, even in an extreme accident scenario. In order to continue to meet the requirements of the WCP, a simplified strategy is suggested for the generation of future TTT diagrams. A strategy has been developed that would require completing two more TTT diagrams for two averaged, future, predicted waste types. By creating diagrams for the resulting glass compositions of encompassing waste types, it will give insight to the crystallization regions possible for those averages. As discussed in the report, 'Initial MAR Assessments to Access the Impact of Al-Dissolution on DWPF Operating Windows' (WSRC-STI 2007-00688), the majority of waste compositions could be grouped into two futu

Billings, A; Tommy Edwards, T

2009-03-03

283

VennDiagram: a package for the generation of highly-customizable Venn and Euler diagrams in R  

Microsoft Academic Search

BACKGROUND: Visualization of orthogonal (disjoint) or overlapping datasets is a common task in bioinformatics. Few tools exist to automate the generation of extensively-customizable, high-resolution Venn and Euler diagrams in the R statistical environment. To fill this gap we introduce VennDiagram, an R package that enables the automated generation of highly-customizable, high-resolution Venn diagrams with up to four sets and Euler

Hanbo Chen; Paul C. Boutros

2011-01-01

284

Oak Ridge K-25 Site Technology Logic Diagram. Volume 2, Technology Logic Diagrams  

SciTech Connect

The Oak Ridge K-25 Technology Logic Diagram (TLD), a decision support tool for the K-25 Site, was developed to provide a planning document that relates envirorunental restoration and waste management problems at the Oak Ridge K-25 Site to potential technologies that can remediate these problems. The TLD technique identifies the research necessary to develop these technologies to a state that allows for technology transfer and application to waste management, remedial action, and decontamination and decommissioning activities. The TLD consists of four separate volumes-Vol. 1, Vol. 2, Vol. 3A, and Vol. 3B. Volume 1 provides introductory and overview information about the TLD. This volume, Volume 2, contains logic diagrams with an index. Volume 3 has been divided into two separate volumes to facilitate handling and use.

Fellows, R.L. [ed.

1993-02-26

285

Accident/Mishap Investigation System  

NASA Technical Reports Server (NTRS)

InvestigationOrganizer (IO) is a Web-based collaborative information system that integrates the generic functionality of a database, a document repository, a semantic hypermedia browser, and a rule-based inference system with specialized modeling and visualization functionality to support accident/mishap investigation teams. This accessible, online structure is designed to support investigators by allowing them to make explicit, shared, and meaningful links among evidence, causal models, findings, and recommendations.

Keller, Richard; Wolfe, Shawn; Gawdiak, Yuri; Carvalho, Robert; Panontin, Tina; Williams, James; Sturken, Ian

2007-01-01

286

Distribution feeder one-line diagrams automatic generation from geographic diagrams based on GIS  

Microsoft Academic Search

Geographic information systems (GIS) are computer-based systems designed to support the capture, management, manipulation, analysis, and modeling of spatially referenced data. At present, GIS has been extensively used in the energy management system and provides visualized platform to electrical distribution system analysis, design and operation, that is, AM\\/FM\\/GIS. One-line diagrams are widely used to represent the electrical distribution system current

Xianqi Li; Xiaoliang Feng; Zhiyuan Zeng; Xuejun Xu; Yonschuan Zhang

2008-01-01

287

Students' Perceptions of Roundhouse Diagramming: A Middle-School Viewpoint.  

ERIC Educational Resources Information Center

Explores the effects in a multiple case study of Roundhouse diagram construction and use on meaningful learning of science concepts in a 6th grade classroom. Concludes that the students typically gained a greater understanding of science explanations by constructing the diagrams. (Author/MM)

Ward, Robin E.; Wandersee, James H.

2002-01-01

288

The Effect of Causal Diagrams on Text Learning  

ERIC Educational Resources Information Center

We examined the effect of studying a causal diagram on comprehension of causal relationships from an expository science text. A causal diagram is a type of visual display that explicitly represents cause-effect relationships. In Experiment 1, readers between conditions did not differ with respect to memory for main ideas, but the readers who…

McCrudden, Matthew T.; Schraw, Gregory; Lehman, Stephen; Poliquin, Anne

2007-01-01

289

Drawing Euler Diagrams with Circles: The Theory of Piercings.  

PubMed

Euler diagrams are effective tools for visualizing set intersections. They have a large number of application areas ranging from statistical data analysis to software engineering. However, the automated generation of Euler diagrams has never been easy: given an abstract description of a required Euler diagram, it is computationally expensive to generate the diagram. Moreover, the generated diagrams represent sets by polygons, sometimes with quite irregular shapes which make the diagrams less comprehensible. In this paper we address these two issues by developing the theory of piercings, where we define single piercing curves and double piercing curves. We prove that if a diagram can be built inductively by successively adding piercing curves under certain constraints then it can be drawn with circles, which are more aesthetically pleasing than arbitrary polygons. The theory of piercings is developed at the abstract level. In addition, we present a Java implementation that, given an inductively pierced abstract description, generates an Euler diagram consisting only of circles within polynomial time. PMID:20855916

Stapleton, Gem; Zhang, Leishi; Howse, John; Rodgers, Peter

2010-09-01

290

Application of quaternary phase diagrams to compound semiconductor processing  

SciTech Connect

Isobaric, isothermal phase diagrams are a molar representation of condensed phases in equilibrium with each other at a fixed temperature, pressure, and composition. Since three or four elements are usually involved at a fabricated interface in a semiconductor device, knowledge of the appropriate ternary or quaternary phase diagram is important for optimizing the processing parameters and designing long term stability of devices. While the use of phase diagrams is well-established in the fields of metallurgy, ceramics and mineralogy, only recently have phase diagrams been employed to provide a framework for understanding thin film reactions on a substrate, encountered in semiconductor processing. Even though there are many examples of applications of ternary phase diagrams in the semiconductor literature (for instance, metallization of GaAs, the use of refractory metal silicides for metallization layers in VLSI devices and oxidation of III-V compounds), the same is not true for quaternary phase diagrams. To date, the only application is oxidation of mercury cadmium telluride. This lack of examples is not warranted, as four elements are often involved at a critical interface in compound semiconductor processing and devices. This paper reports on the progress made to remedy this situation by considering the application of quaternary phase diagrams to understanding and predicting the behavior of II-VI thin film interfaces in photovoltaic devices under annealing conditions. Moreover, for the first time, solid solubility is taken into account for quaternary phase diagrams of semiconductor systems.

Sinclair, R.

1994-10-01

291

Do students use and understand free-body diagrams?  

NSDL National Science Digital Library

Physics education literature recommends using multiple representations to help students understand concepts and solve problems. However, there is little research concerning why students use the representations and whether those who use them are more successful. This study addresses these questions using free-body diagrams (diagrammatic representations used in problems involving forces) as a type of representation. We conducted a two-year quantitative and qualitative study of studentsâ use of free-body diagrams while solving physics problems. We found that when students are in a course that consistently emphasizes the use of free-body diagrams, the majority of them do use diagrams on their own to help solve exam problems even when they receive no credit for drawing the diagrams. We also found that students who draw diagrams correctly are significantly more successful in obtaining the right answer for the problem. Lastly, we interviewed students to uncover their reasons for using free-body diagrams. We found that high achieving students used the diagrams to help solve the problems and as a tool to evaluate their work while low achieving students only used representations as aids in the problem-solving process.

Rosengrant, David; Van Heuvelen, Alan; Etkina, Eugenia

2014-03-31

292

Do students use and understand free-body diagrams?  

NSDL National Science Digital Library

Physics education literature recommends using multiple representations to help students understand concepts and solve problems. However, there is little research concerning why students use the representations and whether those who use them are more successful. This study addresses these questions using free-body diagrams (diagrammatic representations used in problems involving forces) as a type of representation. We conducted a two-year quantitative and qualitative study of studentsâ use of free-body diagrams while solving physics problems. We found that when students are in a course that consistently emphasizes the use of free-body diagrams, the majority of them do use diagrams on their own to help solve exam problems even when they receive no credit for drawing the diagrams. We also found that students who draw diagrams correctly are significantly more successful in obtaining the right answer for the problem. Lastly, we interviewed students to uncover their reasons for using free-body diagrams. We found that high achieving students used the diagrams to help solve the problems and as a tool to evaluate their work while low achieving students only used representations as aids in the problem-solving process.

Rosengrant, David; Van Heuvelen, Alan; Etkina, Eugenia

2010-06-29

293

Doniach diagram for ordered, disordered and underscreened Kondo lattices  

Microsoft Academic Search

The Doniach's diagram has been originally proposed to describe the competition between the local Kondo effect and the inter-site RKKY interactions in cerium compounds. Here we discuss the extension of this diagram to different variations of Kondo lattice model. We consider (a) ordered cerium compounds where the competition between magnetic order and Kondo effect plays an important role, as in

B. Coqblin; J. R. Iglesias; N. B. Perkins; S. G. Magalhães; F. M. Zimmer

2008-01-01

294

Pourbaix ("E"-pH-M) Diagrams in Three Dimensions  

ERIC Educational Resources Information Center

"E"-pH (Pourbaix) diagrams provide an important graphical link between the thermodynamic calculations of potential, pH, equilibrium constant, concentration, and changes in Gibbs energy and the experimentally observed behavior of species in aqueous solutions. The utility of "E"-pH diagrams is extended with the introduction of an additional…

Pesterfield, Lester L.; Maddox, Jeremy B.; Crocker, Michael S.; Schweitzer, George K.

2012-01-01

295

Water, Water, Everywhere: Phase Diagrams of Ordinary Water Substance  

Microsoft Academic Search

A three-dimensional phase diagram for ordinary water substance, with its solid, liquid, and vapor phases, based on fitted authentic experimental data is presented. Such an authentic diagram appears not to have been presented for water before, and may improve the understanding of its phase relationships. The nature of the IAPWS-95 equations, fitted to data, is discussed.

L. Glasser

2004-01-01

296

Water, Water Everywhere: Phase Diagrams of Ordinary Water Substance  

ERIC Educational Resources Information Center

The full phase diagram of water in the form of a graphical representation of the three-dimensional (3D) PVT diagram using authentic data is presented. An interesting controversy regarding the phase behavior of water was the much-touted proposal of a solid phase of water, polywater, supposedly stable under atmospheric conditions.

Glasser, L.

2004-01-01

297

Knot symbols: A tool to describe and simplify knot diagrams  

SciTech Connect

A convenient representation of knot diagrams by abstract symbols is introduced. A set of simple moves, which are convenient combinations of the classic Reidemeister moves, is also introduced. These moves can be applied directly to the symbols to obtain simplified symbols (and therefore simplified diagrams) for the knot.

Bruschi, M. [Universita La Sapienza, Rome (Italy)]|[INFN, Rome (Italy)

1996-04-01

298

An Introductory Idea for Teaching Two-Component Phase Diagrams  

ERIC Educational Resources Information Center

The teaching of two-component phase diagrams has attracted little attention in this "Journal," and it is hoped that this article will make a useful contribution. Current physical chemistry textbooks describe two-component phase diagrams adequately, but do so in a piecemeal fashion one section at a time; first solid-liquid equilibria, then…

Peckham, Gavin D.; McNaught, Ian J.

2011-01-01

299

Argument Diagramming and Critical Thinking in Introductory Philosophy  

ERIC Educational Resources Information Center

In a multi-study naturalistic quasi-experiment involving 269 students in a semester-long introductory philosophy course, we investigated the effect of teaching argument diagramming (AD) on students' scores on argument analysis tasks. An argument diagram is a visual representation of the content and structure of an argument. In each study, all of…

Harrell, Maralee

2011-01-01

300

Heuristic Diagrams as a Tool to Teach History of Science  

ERIC Educational Resources Information Center

The graphic organizer called here heuristic diagram as an improvement of Gowin's Vee heuristic is proposed as a tool to teach history of science. Heuristic diagrams have the purpose of helping students (or teachers, or researchers) to understand their own research considering that asks and problem-solving are central to scientific activity. The…

Chamizo, Jose A.

2012-01-01

301

Block Diagrams and Transfer Functions of the Synchronous Machine  

Microsoft Academic Search

The synchronous machine can be represented by a simple and easily surveyed block diagram from which can be derived all possible transfer functions. Because of the introduction of complex representation of input and output quantities, this block diagram is valid for the positive as well as for the negative-sequence system of the stator. These transfer functions for the positive and

I. M. Canay

1966-01-01

302

Functional block diagrams and automated construction of event trees  

Microsoft Academic Search

Functional block diagrams are introduced as graphical representations of the function of a system. A functional block provides the output of a system as the outcome of a joint event defined by the inputs to the system and its various states. Functional blocks corresponding to different subsystems are combined together to form a functional block diagram representing the functional characteristics

Ioannis A. Papazoglou

1998-01-01

303

BLOCKER: A block diagram editing utility, release notes  

Microsoft Academic Search

The BLOCKER block diagram utility was written in the interest of promoting better software documentation. It allows the user to easily create block diagrams which can be stored within software source text files and printed out with standard line printing devices. In this way, sketches which are often drawn on paper during software coding can be kept in an organized

1986-01-01

304

Dynamic Reliability Block Diagrams VS Dynamic Fault Trees  

Microsoft Academic Search

Reliability block diagrams (RBD), and fault trees (FT) are the most widely used formalisms in system reliability modeling. They implement two different approaches: in a reliability block diagram, the system is represented by components connected according to their function or reliability relationships, while fault trees show which combinations of the components failures will result in a system failure. Although RBD

Salvatore Distefano; Antonio Puliafito

2007-01-01

305

Block diagram-based modeling of manufacturing systems using  

Microsoft Academic Search

A novel approach to modeling of manufacturing systems is proposed. The model is based on block diagrams. The block can be a single machine, a single part or a factory. The interconnection of blocks in the block diagram correspond to routing of parts and resources through the manufacturing subsystems. The model is hierarchial - a network of blocks can be

Aleksey Imaev; Robert P. Judd

2009-01-01

306

Block Diagrams: A Tutorial Alternative to Dynamical Analogies  

Microsoft Academic Search

Educational advantages and disadvantages of dynamical analogy and block-diagram models for interdisciplinary systems are discussed. If the system equations are known, a block-diagram is a useful tutorial alternative to the conventional dynamical analogy. It is easily drawn and yields a direct, graphical representation of the system equations with block elements that are not required to be physical elements of a

D. Preis

1976-01-01

307

Data flow diagrams: reverse engineering production and animation  

Microsoft Academic Search

The authors propose the use of interactive animation techniques as a support to reverse engineering processes oriented to the synthesis of semantic abstractions. Starting from data flow diagrams, a formal model, called dynamic data flow diagrams (DDFDs), has been defined, which can be used for the production of executable models of a software system. A strategy for the DDFD interactive

G. Canfora; L. Sansone; G. Visaggio

1992-01-01

308

Formal semantics for SA style data flow diagram specification languages  

Microsoft Academic Search

Using operational semantic techniques, we present a formal semantics for an extended variant of structured analysis style data flow diagrams. This semantics is intended to serve as a semantic foundation for many different specification languages that specify concurrent systems using a graphical notation similar to data flow diagrams. Besides allowing one to specify how information is processed, it allows one

Gary T. Leavens; Tim Wahls; Albert L. Baker

1999-01-01

309

Automated Analysis of Doppler Ultrasound Velocity Flow Diagrams  

Microsoft Academic Search

A highly automated method for the identification and quantization of maximum blood velocity curves from Doppler ultrasound flow diagrams is presented. The method uses an image processing scheme to analyze video-recorded image sequences of flow diagrams. The sequences are acquired, a sequence of images relating to chronological cardiac cycles is extracted, and a maximum blood velocity envelope is determined and

Juerg Tschirren; Ronald M. Lauer; Milan Sonka

2001-01-01

310

Features of Fatigue Diagrams under Fretting-Corrosion Conditions.  

National Technical Information Service (NTIS)

The peculiarities of a fatigue diagram under fretting-corrosion conditions are examined: a method of the accelerated construction of the diagram is proposed, based on the known criteria of cyclic strength and also on the results on an investigation made f...

V. N. Stepanov

1969-01-01

311

Using a Spreadsheet To Explore Melting, Dissolving and Phase Diagrams.  

ERIC Educational Resources Information Center

Compares phase diagrams relating to the solubilities and melting points of various substances in textbooks with those generated by a spreadsheet using data from the literature. Argues that differences between the diagrams give rise to new chemical insights. (Author/MM)

Goodwin, Alan

2002-01-01

312

The new interconversion algorithm between ladder diagram and instruction list  

Microsoft Academic Search

In the application of PLC (Programmable Logic Controller), ladder diagram is visual and easy to control by engineering staff, besides, instruction list is easily convert into assembly language program, so they are favored by technicians, so that the research of interconversion between ladder diagram and instruction list become a key technique in development of PLC. The conversion algorithm in present

Li Dandan; Cai Qixian; Pei Feng

2010-01-01

313

Diagrams in Mathematics: To Draw or Not to Draw?  

ERIC Educational Resources Information Center

This paper describes the use of diagrams as self-explanatory tools. It considers the use of diagrams, in general, and more specifically, examines research that is currently being undertaken in the broad field of visualisation. The research participants referred to in this article were Advanced Certificate of Education students and the paper…

Mudaly, Vimolan

2012-01-01

314

Symbol-and-Arrow Diagrams in Teaching Pharmacokinetics.  

ERIC Educational Resources Information Center

Symbol-and-arrow diagrams are helpful adjuncts to equations derived from pharmacokinetic models. Both show relationships among dependent and independent variables. Diagrams show only qualitative relationships, but clearly show which variables are dependent and which are independent, helping students understand complex but important functional…

Hayton, William L.

1990-01-01

315

Vesicle computers: Approximating a Voronoi diagram using Voronoi automata  

NASA Astrophysics Data System (ADS)

Irregular arrangements of vesicles filled with excitable and precipitating chemical systems are imitated by Voronoi automata --- finite-state machines defined on a planar Voronoi diagram. Every Voronoi cell takes four states: resting, excited, refractory and precipitate. A resting cell excites if it has at least one excited neighbour; the cell precipitates if a ratio of excited cells in its neighbourhood to its number of neighbours exceed certain threshold. To approximate a Voronoi diagram on Voronoi automata we project a planar set onto automaton lattice, thus cells corresponding to data-points are excited. Excitation waves propagate across the Voronoi automaton, interact with each other and form precipitate in result of the interaction. Configuration of precipitate represents edges of approximated Voronoi diagram. We discover relation between quality of Voronoi diagram approximation and precipitation threshold, and demonstrate feasibility of our model in approximation Voronoi diagram of arbitrary-shaped objects and a skeleton of a planar shape.

Adamatzky, Andrew; de Lacy Costello, Ben; Holley, Julian; Gorecki, Jerzy; Bull, Larry

2011-07-01

316

Efficient Computation of 3D Clipped Voronoi Diagram  

NASA Astrophysics Data System (ADS)

The Voronoi diagram is a fundamental geometry structure widely used in various fields, especially in computer graphics and geometry computing. For a set of points in a compact 3D domain (i.e. a finite 3D volume), some Voronoi cells of their Voronoi diagram are infinite, but in practice only the parts of the cells inside the domain are needed, as when computing the centroidal Voronoi tessellation. Such a Voronoi diagram confined to a compact domain is called a clipped Voronoi diagram. We present an efficient algorithm for computing the clipped Voronoi diagram for a set of sites with respect to a compact 3D volume, assuming that the volume is represented as a tetrahedral mesh. We also describe an application of the proposed method to implementing a fast method for optimal tetrahedral mesh generation based on the centroidal Voronoi tessellation.

Yan, Dong-Ming; Wang, Wenping; Lévy, Bruno; Liu, Yang

317

Calculation of Gallium-metal-Arsenic phase diagrams  

NASA Technical Reports Server (NTRS)

Electrical contacts and metallization to GaAs solar cells must survive at high temperatures for several minutes under specific mission scenarios. The determination of which metallizations or alloy systems that are able to withstand extreme thermal excursions with minimum degradation to solar cell performance can be predicted by properly calculated temperature constitution phase diagrams. A method for calculating a ternary diagram and its three constituent binary phase diagrams is briefly outlined and ternary phase diagrams for three Ga-As-X alloy systems are presented. Free energy functions of the liquid and solid phase are approximated by the regular solution theory. Phase diagrams calculated using this method are presented for the Ga-As-Ge and Ga-As-Ag systems.

Scofield, J. D.; Davison, J. E.; Ray, A. E.; Smith, S. R.

1991-01-01

318

Operator approach to analytical evaluation of Feynman diagrams  

SciTech Connect

The operator approach to analytical evaluation of multiloop Feynman diagrams is proposed. We show that the known analytical methods of evaluation of massless Feynman integrals, such as the integration-by-parts method and the method of 'uniqueness' (which is based on the star-triangle relation), can be drastically simplified by using this operator approach. To demonstrate the advantages of the operator method of analytical evaluation of multiloop Feynman diagrams, we calculate ladder diagrams for the massless {phi}{sup 3} theory (analytical results for these diagrams are expressed in terms of multiple polylogarithms). It is shown how operator formalism can be applied to calculation of certain massive Feynman diagrams and investigation of the Lipatov integrable chain model.

Isaev, A. P., E-mail: isaevap@theor.jinr.r [Joint Institute for Nuclear Research, Bogolyubov Laboratory of Theoretical Physics (Russian Federation)

2008-05-15

319

Failure diagrams for unidirectional fiber metal-matrix composites  

SciTech Connect

Pertinent failure processes in unidirectional fiber metal-matrix composites (MMCs) have been identified and analyzed. The critical conditions for interface delamination in several composites are compared with the theoretical delamination diagram proposed by He and Hutchinson, in which interface delamination and fiber fracture are delineated on the basis of their relative toughness values. It is shown that the delamination diagram does not provide information about the extent of interface cracking or the onset of fiber bridging. An alternative failure diagram that depicts composite fracture processes, such as matrix yielding followed by fiber fracture, interface cracking, and fiber bridging, is proposed. Development of the composite failure diagram via micromechanical modeling of individual mechanisms is presented together with experimental results from the literature. Good correlation between theory and experiment suggests that the composite failure diagram might be used for tailoring composite properties through control of the dominant fracture mechanism.

Chan, K.S. (Southwest Research Inst., San Antonio, TX (United States))

1993-07-01

320

Finite calculation of divergent self-energy diagrams  

NASA Astrophysics Data System (ADS)

Using dispersive techniques, it is possible to avoid ultraviolet divergences in the calculation of Feynman diagrams, making subsequent regularization of divergent diagrams unnecessary. We give a simple introduction to the most important features of such dispersive techniques in the framework of the so-called finite causal perturbation theory. The method is also applied to the "divergent" general massive two-loop sunrise self-energy diagram, where it leads directly to an analytic expression for the imaginary part of the diagram in accordance with the literature, whereas the real part can be obtained by a single integral dispersion relation. It is pointed out that dispersive methods have been known for decades and have been applied to several nontrivial Feynman diagram calculations.

Aste, A.; Trautmann, D.

2003-12-01

321

Molecular crystal global phase diagrams. I. Method of construction.  

PubMed

A method is described to produce global phase diagrams for single-component molecular crystals with separable internal and external modes. The phase diagrams present the equilibrium crystalline phase as a function of the coefficients of a general intermolecular potential based on rotational symmetry-adapted basis functions. It is assumed that phase transitions are driven by orientational ordering of molecules with a fixed time-averaged shape. The mean-field approximation is utilized and the process begins in a high-temperature disordered reference state, then spontaneous symmetry-breaking phase transitions and phase structure information at lower temperature are sought. The information is mapped onto phase diagrams using the intermolecular expansion coefficients as independent variables. This is illustrated by global phase diagrams for molecules having tetrahedral symmetry (e.g. carbon tetrachloride, adamantane and white phosphorus). Uses of global phase diagrams include crystal structure data mining, guidance for crystal design and enumeration of likely or missing polymorphic structures. PMID:15507746

Mettes, Jonathan A; Keith, J Brandon; McClurg, Richard B

2004-11-01

322

Stability diagram for the forced Kuramoto model.  

PubMed

We analyze the periodically forced Kuramoto model. This system consists of an infinite population of phase oscillators with random intrinsic frequencies, global sinusoidal coupling, and external sinusoidal forcing. It represents an idealization of many phenomena in physics, chemistry, and biology in which mutual synchronization competes with forced synchronization. In other words, the oscillators in the population try to synchronize with one another while also trying to lock onto an external drive. Previous work on the forced Kuramoto model uncovered two main types of attractors, called forced entrainment and mutual entrainment, but the details of the bifurcations between them were unclear. Here we present a complete bifurcation analysis of the model for a special case in which the infinite-dimensional dynamics collapse to a two-dimensional system. Exact results are obtained for the locations of Hopf, saddle-node, and Takens-Bogdanov bifurcations. The resulting stability diagram bears a striking resemblance to that for the weakly nonlinear forced van der Pol oscillator. PMID:19123638

Childs, Lauren M; Strogatz, Steven H

2008-12-01

323

Stability diagram for the forced Kuramoto model  

NASA Astrophysics Data System (ADS)

We analyze the periodically forced Kuramoto model. This system consists of an infinite population of phase oscillators with random intrinsic frequencies, global sinusoidal coupling, and external sinusoidal forcing. It represents an idealization of many phenomena in physics, chemistry, and biology in which mutual synchronization competes with forced synchronization. In other words, the oscillators in the population try to synchronize with one another while also trying to lock onto an external drive. Previous work on the forced Kuramoto model uncovered two main types of attractors, called forced entrainment and mutual entrainment, but the details of the bifurcations between them were unclear. Here we present a complete bifurcation analysis of the model for a special case in which the infinite-dimensional dynamics collapse to a two-dimensional system. Exact results are obtained for the locations of Hopf, saddle-node, and Takens-Bogdanov bifurcations. The resulting stability diagram bears a striking resemblance to that for the weakly nonlinear forced van der Pol oscillator.

Childs, Lauren M.; Strogatz, Steven H.

2008-12-01

324

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

325

Community detection by graph Voronoi diagrams  

NASA Astrophysics Data System (ADS)

Accurate and efficient community detection in networks is a key challenge for complex network theory and its applications. The problem is analogous to cluster analysis in data mining, a field rich in metric space-based methods. Common to these methods is a geometric, distance-based definition of clusters or communities. Here we propose a new geometric approach to graph community detection based on graph Voronoi diagrams. Our method serves as proof of principle that the definition of appropriate distance metrics on graphs can bring a rich set of metric space-based clustering methods to network science. We employ a simple edge metric that reflects the intra- or inter-community character of edges, and a graph density-based rule to identify seed nodes of Voronoi cells. Our algorithm outperforms most network community detection methods applicable to large networks on benchmark as well as real-world networks. In addition to offering a computationally efficient alternative for community detection, our method opens new avenues for adapting a wide range of data mining algorithms to complex networks from the class of centroid- and density-based clustering methods.

Deritei, Dávid; Lázár, Zsolt I.; Papp, István; Járai-Szabó, Ferenc; Sumi, Róbert; Varga, Levente; Ravasz Regan, Erzsébet; Ercsey-Ravasz, Mária

2014-06-01

326

The Dy-Zn phase diagram  

NASA Astrophysics Data System (ADS)

The dysprosium-zinc phase diagram has been investigated over its entire composition range by using differential thermal analysis, (DTA) metallographic analysis, X-ray powder diffraction, and electron probe microanalysis (EPMA). Seven intermetallic phases have been found and their structures confirmed. DyZn, DyZn2, Dy13Zn58, and Dy2Zn17 melt congruently at 1095 °C, 1050 °C, 930 °C, and 930 °C, respectively. DyZn3, Dy3Zn11, and DyZn12 form through peritectic reactions at 895 °C, about 900 °C and 685 °C, respectively. Four eutectic reactions occur at 850 °C and 30.0 at pct Zn (between (Dy) and DyZn), 990 °C and 60.0 at pct Zn (between DyZn and DyZn2), 885 °C and 76.0 at pct Zn (between DyZn3 and Dy3Zn11), and 875 °C and 85.0 at pct Zn (involving Dy13Zn58 and Dy2Zn17). The Dy-rich end presents a catatectic equilibrium; a degenerate invariant effect has been found in the Zn-rich region. The phase equilibria of the Dy-Zn alloys are discussed and compared with those of the other known RE-Zn systems (RE=rare earth metal) in view of the regular change in the relative stabilities of the phases across the lanthanide series

Saccone, A.; Cardinale, A. M.; Delfino, S.; Ferro, R.

2003-03-01

327

Diagram of Cell to Cell Communication  

NASA Technical Reports Server (NTRS)

Diagram depicts the importance of cell-cell communication as central to the understanding of cancer growth and progression, the focus of the NASA bioreactor demonstration system (BDS-05) investigation. Microgravity studies will allow us to unravel the signaling and communication between these cells with the host and potential development of therapies for the treatment of cancer metastasis. The NASA Bioreactor provides a low turbulence culture environment which promotes the formation of large, three-dimensional cell clusters. Due to their high level of cellular organization and specialization, samples constructed in the bioreactor more closely resemble the original tumor or tissue found in the body. The Bioreactor is rotated to provide gentle mixing of fresh and spent nutrient without inducing shear forces that would damage the cells. 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. Credit: Emory University.

2002-01-01

328

MELCOR analysis of the TMI-2 accident  

SciTech Connect

The MELCOR computer code has been used to analyze the first 174 minutes of the TMI-2 accident. MELCOR is being developed at Sandia National Laboratories for the US Nuclear Regulatory Commission for the purpose of analyzing severe accidents in nuclear power plants. Comparison of the code predictions to the available data shows that MELCOR is capable of modeling the key events of the TMI-2 accident and reasonable agreement with the available data is obtained. In particular, the core degradation and hydrogen generation models agree with best-estimate information available for this phase of the accident. While the code uses simplified modeling, all important characteristics of the reactor system and the accident phenomena could be modeled. This exercise demonstrates that MELCOR is applicable to severe accident analysis. 6 refs., 7 figs., 2 tabs.

Boucheron, E.A.; Kelly, J.E.

1988-01-01

329

Tako-tsubo cardiomyopathy after automobile accident  

Microsoft Academic Search

A 53-year-old woman was involved in a traffic accident while driving her car. She had chest oppressive sensation 6 h after the accident, and was admitted to our hospital.On admission, she had no external injury. She was fully conscious, and felt anxiety about the accident. Twelve-lead electrocardiogram showed mild ST-segment elevation in leads II, III, aVF and V2-5. Chest X-ray did

Satoshi Kurisu; Ichiro Inoue; Takuji Kawagoe; Masaharu Ishihara; Yuji Shimatani; Yasuharu Nakama; Keisuke Ohkawa; Tatsuya Maruhashi; Eisuke Kagawa; Kazuoki Dai; Toshiyuki Aokage

2007-01-01

330

Aircraft Accident Reports - Brief Format, U.S. Civil Aviation, Issue Number 2 of 1981 Accidents.  

National Technical Information Service (NTIS)

The publication contains selected aircraft accident reports, in brief format, occurring in U.S. civil aviation operations during calendar year 1981. The 299 General Aviation accidents contained in this publication represent a random selection. This public...

1982-01-01

331

Aircraft Accident Reports - Brief Format, U.S. Civil Aviation, Issue Number 4 of 1981 Accidents.  

National Technical Information Service (NTIS)

The publication contains selected aircraft accident reports, in brief format, occurring in U.S. civil aviation operations during calendar year 1981. The 297 General Aviation accidents contained in this publication represent a random selection. This public...

1982-01-01

332

Aircraft Accidents Reports, Brief Format, U.S. Civil Aviation Issue Number 13 of 1979 Accidents.  

National Technical Information Service (NTIS)

This publication contains selected aircraft accident reports, in brief format, occurring in U.S. civil aviation operations during calendar year 1979. The 300 General Aviation accidents contained in this publication represent a random selection. This publi...

1981-01-01

333

COMMERCIAL SNF ACCIDENT RELEASE FRACTIONS  

SciTech Connect

The purpose of this design analysis is to specify and document the total and respirable fractions for radioactive materials that are released from an accident event at the Monitored Geologic Repository (MGR) involving commercial spent nuclear fuel (CSNF) in a dry environment. The total and respirable release fractions will be used to support the preclosure licensing basis for the MGR. The total release fraction is defined as the fraction of total CSNF assembly inventory, typically expressed as an activity inventory (e.g., curies), of a given radionuclide that is released to the environment from a waste form. The radionuclides are released from the inside of breached fuel rods (or pins) and from the detachment of radioactive material (crud) from the outside surfaces of fuel rods and other components of fuel assemblies. The total release fraction accounts for several mechanisms that tend to retain, retard, or diminish the amount of radionuclides that are available for transport to dose receptors or otherwise can be shown to reduce exposure of receptors to radiological releases. The total release fraction includes a fraction of airborne material that is respirable and could result in inhalation doses. This subset of the total release fraction is referred to as the respirable release fraction. Potential accidents may involve waste forms that are characterized as either bare (unconfined) fuel assemblies or confined fuel assemblies. The confined CSNF assemblies at the MGR are contained in shipping casks, canisters, or disposal containers (waste packages). In contrast to the bare fuel assemblies, the container that confines the fuel assemblies has the potential of providing an additional barrier for diminishing the total release fraction should the fuel rod cladding breach during an accident. However, this analysis will not take credit for this additional bamer and will establish only the total release fractions for bare unconfined CSNF assemblies, which may however be conservatively applied to confined CSNF assemblies.

S.O. Bader

1999-10-18

334

Thermal hydraulic features of the TMI accident  

NASA Astrophysics Data System (ADS)

The Three Mile island (TMI)-2 accident resulted in extensive core damage and recent data confirms that the reactor vessel was challenged from molten core materials. A hypothesized TMI accident scenario is presented that consistently explains the TMI data and is also consistent with research findings from independent severe fuel damage experiments. The TMI data will prove useful in confirming our understanding of severe core damage accidents under realistic reactor systems conditions. This understanding will aid in addressing safety and regulatory issues related to severe core damage accidents in light water reactors.

Tolman, B.

1985-10-01

335

The determinants of fishing vessel accident severity.  

PubMed

The study examines the determinants of fishing vessel accident severity in the Northeastern United States using vessel accident data from the U.S. Coast Guard for 2001-2008. Vessel damage and crew injury severity equations were estimated separately utilizing the ordered probit model. The results suggest that fishing vessel accident severity is significantly affected by several types of accidents. Vessel damage severity is positively associated with loss of stability, sinking, daytime wind speed, vessel age, and distance to shore. Vessel damage severity is negatively associated with vessel size and daytime sea level pressure. Crew injury severity is also positively related to the loss of vessel stability and sinking. PMID:24473412

Jin, Di

2014-05-01

336

Systematics of Reconstructed Process Facility Criticality Accidents  

SciTech Connect

The systematics of the characteristics of twenty-one criticality accidents occurring in nuclear processing facilities of the Russian Federation, the United States, and the United Kingdom are examined. By systematics the authors mean the degree of consistency or agreement between the factual parameters reported for the accidents and the experimentally known conditions for criticality. The twenty-one reported process criticality accidents are not sufficiently well described to justify attempting detailed neutronic modeling. However, results of classic hand calculations confirm the credibility of the reported accident conditions.

Pruvost, N.L.; McLaughlin, T.P.; Monahan, S.P.

1999-09-19

337

Biorhythmic Cycles and the Incidence of Industrial Accidents  

ERIC Educational Resources Information Center

The biorhythm theory of accident explanation that has been increasingly popularized in the business press was empirically examined. Municipal employees involved in work-related vehicular accidents and in on-the-job accidents provided the data. Each accident was analyzed to determine whether or not the accident occurred on a biorhythmically…

Carvey, Davis W.; Nibler, Roger G.

1977-01-01

338

The high-z quasar Hubble Diagram  

NASA Astrophysics Data System (ADS)

Two recent discoveries have made it possible for us to begin using high-z quasars as standard candles to construct a Hubble Diagram (HD) at z > 6. These are (1) the recognition from reverberation mapping that a relationship exists between the optical/UV luminosity and the distance of line-emitting gas from the central ionizing source. Thus, together with a measurement of the velocity of the line-emitting gas, e.g., via the width of BLR lines, such as Mg II, a single observation can therefore in principle provide a determination of the black hole's mass; and (2) the identification of quasar ULAS J1120+0641 at z = 7.085, which has significantly extended the redshift range of these sources, providing essential leverage when fitting theoretical luminosity distances to the data. In this paper, we use the observed fluxes and Mg II line-widths of these sources to show that one may reasonably test the predicted high-z distance versus redshift relationship, and we assemble a sample of 20 currently available high-z quasars for this exercise. We find a good match between theory and observations, suggesting that a more complete, high-quality survey may indeed eventually produce an HD to complement the highly-detailed study already underway (e.g., with Type Ia SNe, GRBs, and cosmic chronometers) at lower redshifts. With the modest sample we have here, we show that the Rh = ct Universe and ?CDM both fit the data quite well, though the smaller number of free parameters in the former produces a more favorable outcome when we calculate likelihoods using the Akaike, Kullback, and Bayes Information Criteria. These three statistical tools result in similar probabilities, indicating that the Rh = ct Universe is more likely than ?CDM to be correct, by a ratio of about 85% to 15%.

Melia, Fulvio

2014-01-01

339

Research principles and the construction of mnemonic diagrams  

NASA Technical Reports Server (NTRS)

Mnemonic diagrams are defined as a variety of information display devices, the essential element of which is conventional graphical presentation of technological or functional-operational links in a controlled system or object. Graphically displaying the operational structure of an object, the interd dependence between different parameters, and the interdependence between indicators and control organs, the mneomonic diagram reduces the load on the operator's memory and facilitates perception and reprocessing of information and decision making, while at the same time playing the role of visual support to the information activity of the operator. The types of mnemonic diagrams are listed.

Venda, V. F.; Mitkin, A. A.

1973-01-01

340

Denitrifying sulfide removal by enriched microbial consortium: Kinetic diagram.  

PubMed

Denitrifying sulfide removal (DSR) process simultaneously removes nitrate, sulfide and organic matters in the same reactor. This study isolated eight DSR strains and composed a microbial consortium to reveal the stoichiometry and kinetics of autotrophic, heterotrophic and mixotrophic denitrification (DSR). A novel kinetic diagram based on mass and electron balances was proposed to graphically interpret the system kinetics and identify the accessible regime where DSR reactions can be applied. Demonstration of the use of the proposed diagram showed the easy assessment of DSR system performance by the status on the diagram. PMID:24874878

Lee, Duu-Jong; Wong, Biing-Teo

2014-07-01

341

Sloan Digital Sky Survey - H-R Diagram  

NSDL National Science Digital Library

This website, containing information from the Sloan Digital Sky Survey, provides students with the opportunity to make a H-R Diagram for different star systems. It goes through the relation between the color of a star and its surface temperature, in order to obtain a preliminary diagram. Then, using data from the Hipparcos probe, and the Pleiades system, the student is able to calculate the distance to several stars, which leads to the final version of the Diagram. The same concept is applied to Globular Clusters, and the student is able to tell the age of it by looking at its color.

2009-09-16

342

Physics of high contrast gratings: a band diagram insight  

NASA Astrophysics Data System (ADS)

We generalize the theoretical modelling of high contrast gratings (HCGs) to arbitrary incidence angle. We unveil the HCG band diagram with HCG supermode formulism, and present the intriguing connections between HCG and 1D photonic crystal (PhC). We show, for the first time, HCG and PhC can be unified in the same theoretical analysis architecture. They differentiate themselves by operating at different regimes in the band diagram. The HCG band diagram not only provides a powerful tool to study both HCG and PhC, but also to design various optical components with different functionalities on the HCG-based optoelectronics platform.

Yang, Weijian; Chang-Hasnain, Connie J.

2013-03-01

343

Feynman-Goldstone diagrams in a time-dependent basis  

NASA Astrophysics Data System (ADS)

A generalization of many-fermion Feynman-Goldstone diagrams is derived based on a time-dependent unperturbed Hamiltonian along with a time-dependent reference state. In lowest order, the time-dependent Hartree-Fock equations follow immediately from the same arguments which lead to static Hartree-Fock when the basis is time independent. Systematic corrections to the time-dependent Hartree-Fock mean-field approximation are obtained through higher order diagrams. [NUCLEAR STRUCTURE Generalization of Feynman-Goldstone diagrams to a time-dependent reference state. Diagrammatic derivation of the time-dependent Hartree-Fock equations and their systematic corrections.

Baranger, Michel; Zahed, Ismail

1984-03-01

344

Cu-Zn binary phase diagram and diffusion couples  

NASA Technical Reports Server (NTRS)

The objectives of this paper are to learn: (1) what information a binary phase diagram can yield; (2) how to construct and heat treat a simple diffusion couple; (3) how to prepare a metallographic sample; (4) how to operate a metallograph; (5) how to correlate phases found in the diffusion couple with phases predicted by the phase diagram; (6) how diffusion couples held at various temperatures could be used to construct a phase diagram; (7) the relation between the thickness of an intermetallic phase layer and the diffusion time; and (8) the effect of one species of atoms diffusing faster than another species in a diffusion couple.

Mccoy, Robert A.

1992-01-01

345

47 CFR 80.867 - Ship station tools, instruction books, circuit diagrams and testing equipment.  

Code of Federal Regulations, 2013 CFR

...false Ship station tools, instruction books, circuit diagrams and testing equipment...867 Ship station tools, instruction books, circuit diagrams and testing equipment...tools, testing equipment, instruction books and circuit diagrams to enable...

2013-10-01

346

Handle With Care: 10 Common School Accidents  

ERIC Educational Resources Information Center

Accidents, mishaps, injuries can happen in any classroom, cafeteria, gym, hallway, playground and the teacher is probably the first adult to arrive on the scene. These guidelines on how to respond to 10 common school accidents explain what steps to take. (Author/RK)

Bryer, Judith E.

1978-01-01

347

Electrical accidents in mining (1980-85)  

Microsoft Academic Search

The U.S. Bureau of Mines has compiled data on the major causes of fatal and nonfatal electrical accidents relating to mining, and their associated costs, for the 1980-85 period. Specific electrical problem areas were identified, allowing future research to be focused on reducing the number of electrical accidents and injuries are provided. The four mining sectors for which data were

Oyler

1990-01-01

348

MELCOR analyses for accident progression issues  

Microsoft Academic Search

Results of calculations performed with MELCOR and HECTR in support of the NUREG-1150 study are presented in this report. The analyses examined a wide range of issues. The analyses included integral calculations covering an entire accident sequence, as well as calculations that addressed specific issues that could affect several accident sequences. The results of the analyses for Grand Gulf, Peach

S. E. Dingman; C. J. Shaffer; A. C. Payne; M. K. Carmel

1991-01-01

349

MELCOR analysis of the TMI2 accident  

Microsoft Academic Search

This paper describes the analysis of the Three Mile Island-2 (TMI-2) standard problem that was performed with MELCOR. The MELCOR computer code is being developed by Sandia National Laboratories for the Nuclear Regulatory Commission for the purpose of analyzing severe accident in nuclear power plants. The primary role of MELCOR is to provide realistic predictions of severe accident phenomena and

Boucheron

1990-01-01

350

MELCOR accident consequence code system (MACCS)  

Microsoft Academic Search

Currently, the usefulness of reactor accident consequence assessments for providing guidance for planning and decision making is limited by the poor definition of uncertainties in predicted results. The MELCOR Accident Consequence Code System has been structured to facilitate performing uncertainty and sensitivity analyses. MACCS incorporates improved modeling capabilities in the treatment of variable or long duration releases, deposition modeling, dosimetry,

D. J. Alpert; D. I. Chanin; J. C. Helton; R. M. Ostmeyer; L. T. Ritchie

1985-01-01

351

Light-water reactor accident classification  

SciTech Connect

The evolution of existing classifications and definitions of light-water reactor accidents is considered. Licensing practice and licensing trends are examined with respect to terms of art such as Class 8 and Class 9 accidents. Interim definitions, consistent with current licensing practice and the regulations, are proposed for these terms of art.

Washburn, B.W.

1980-02-01

352

A Serious Game for Traffic Accident Investigators  

ERIC Educational Resources Information Center

In Dubai, traffic accidents kill one person every 37 hours and injure one person every 3 hours. Novice traffic accident investigators in the Dubai police force are expected to "learn by doing" in this intense environment. Currently, they use no alternative to the real world in order to practice. This paper argues for the use of an alternative…

Binsubaih, Ahmed; Maddock, Steve; Romano, Daniela

2006-01-01

353

Childhood accidents, family size and birth order  

Microsoft Academic Search

The relationship between accidents and number of children in the household was assessed in 10,394 children surveyed at ages 5 and 10 years. The analyses suggest that living in a household with 3 or more children during the presschool period increases a child's risk of experiencing accidents that result in hospitalization; and that living in a household with 4 or

Polly E. Bijur; Jean Golding; Matthew Kurzon

1988-01-01

354

Accident risks in nuclear-power plants  

Microsoft Academic Search

The paper presents the results of estimates of nuclear-power plant safety based on probabilistic safety analyses and discusses the means used to decrease core damage factors, large release frequency and cancer deaths due to nuclear accidents. Estimates made for new nuclear power plants show that these risks are negligibly small. The radiological effects of the Chernobyl accident are discussed and

A. Strupczewski

2003-01-01

355

Analysis of accidents during instrument approaches.  

PubMed

General aviation and air taxi approach phase accidents, which occurred during Visual and Instrument Flight Rules (VFR and IFR, respectively) over the last 25 years, were analyzed. The data suggest that there is a 204% higher risk during the approach and landing phase of VFR flights, than during similar IFR operations (14.82 vs. 7.27 accidents/100,000 approaches). Alarmingly, the night single pilot IFR (SPIFR) accident rate is almost 8 times the rate of day IFR, 35.43 vs. 4.47 accidents/100,000 approaches, and two and a half times that of day VFR approaches, 35.43 vs. 14.82 accidents/100,000 approaches. Surprisingly, the overall SPIFR accident rates are not much higher than dual-pilot IFR (DPIFR), 7.27 vs. 6.48 accidents/100,000 approaches. The generally static ratio of the statistics for SPIFR/DPIFR accident rates may be accounted for by little or no change in general aviation cockpit technology during the last 25 years, and because IFR operational flight task management training has not kept pace. PMID:1610333

Bennett, C T; Schwirzke, M

1992-04-01

356

Injury reduction by the airbag in accidents  

Microsoft Academic Search

Today an increasing number of automobiles are being equipped with additional passive safety devices: driver and passenger airbags. To examine the efficiency of the airbag in real road traffic accidents, a collective study was conducted from 181 traumatology centres throughout Germany. The inquiry was answered by 81 per cent of the medical centres contacted. From the evaluation of 122 accident

E. H. Kuner; W. Schlickewei; D. Oltmanns

1996-01-01

357

Squeal Those Tires! Automobile-Accident Reconstruction.  

ERIC Educational Resources Information Center

Methods use to reconstruct traffic accidents provide settings for real life applications for students in precalculus, mathematical analysis, or trigonometry. Described is the investigation of an accident in conjunction with the local Highway Patrol Academy integrating physics, vector, and trigonometry. Class findings were compared with those of…

Caples, Linda Griffin

1992-01-01

358

Understanding the TMI2 accident: an overview  

Microsoft Academic Search

The accident at Three Mile Island Unit 2 (TMI-2) on March 28, 1979 has had a profound impact on the nuclear power industry despite the fact that the health consequences to the public were insignificant. There is considerable benefit to the nuclear power industry in understanding the progression of this severe core damage accident and its relationship to the very

R. R. Hobbins; J. M. Broughton; C. M. Allison

1986-01-01

359

Use of Accident Experience in Developing Criteria for Teleoperator Equipment.  

National Technical Information Service (NTIS)

The 1961 SL-1 reactor accident in Idaho and the Recuplex accident at Hanford are reviewed to identify problems common to emergency situations, lessons learned from accidents, criteria for emergency equipment, and recommendations for using robotics to solv...

E. J. Vallario J. M. Selby

1985-01-01

360

10 CFR 835.1304 - Nuclear accident dosimetry.  

Code of Federal Regulations, 2010 CFR

...2009-01-01 false Nuclear accident dosimetry. 835.1304 Section 835.1304...Situations § 835.1304 Nuclear accident dosimetry. (a) Installations possessing...possible, shall provide nuclear accident dosimetry for those individuals. (b)...

2009-01-01

361

32 CFR 634.29 - Traffic accident investigation reports.  

Code of Federal Regulations, 2013 CFR

...pertaining to accidents investigated by military police that resulted in a fatality, personal injury, or estimated damage to Government vehicles... (ii) The accident involves no personal injury. (iii) The accident involves only...

2013-07-01

362

22 CFR 102.17 - Reports on accident.  

Code of Federal Regulations, 2010 CFR

...2009-04-01 false Reports on accident. 102.17 Section 102.17 ...ECONOMIC AND OTHER FUNCTIONS CIVIL AVIATION United States Aircraft Accidents Abroad Foreign Aircraft Accidents Involving United States Persons...

2009-04-01

363

22 CFR 102.17 - Reports on accident.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Reports on accident. 102.17 Section 102.17 ...ECONOMIC AND OTHER FUNCTIONS CIVIL AVIATION United States Aircraft Accidents Abroad Foreign Aircraft Accidents Involving United States Persons...

2010-04-01

364

14 CFR 420.59 - Launch site accident investigation plan.  

Code of Federal Regulations, 2010 CFR

...false Launch site accident investigation plan. 420.59 Section 420...59 Launch site accident investigation plan. (a) General. A licensee...implement a launch site accident investigation plan that contains the...

2009-01-01

365

14 CFR 420.59 - Launch site accident investigation plan.  

Code of Federal Regulations, 2010 CFR

...false Launch site accident investigation plan. 420.59 Section 420...59 Launch site accident investigation plan. (a) General. A licensee...implement a launch site accident investigation plan that contains the...

2010-01-01

366

The neodymium-gold phase diagram  

SciTech Connect

The Nd-Au phase diagram was studied in the 0 to 100 at. pct Au composition range by differential thermal analysis (DTA), X-ray diffraction (XRD), optical microscopy (LOM), scanning electron microscopy (SEM), and electron probe microanalysis (EPMA). Six intermetallic phases were identified, the crystallographic structures were determined or confirmed, and the melting behavior was determined, as follows: Nd{sub 2}Au, orthorhombic oP12-Co{sub 2}Si type, peritectic decomposition at 810 C; NdAu, R.T. form, orthorhombic oP8-FeB type, H.T. forms, orthorhombic oC8-CrB type and, at a higher temperature, cubic cP2-CsCl type, melting point 1470 C; Nd{sub 3}Au{sub 4}, trigonal hR42-Pu{sub 3}Pd{sub 4} type, peritectic decomposition at 1250 C; Nd{sub 17}Au{sub 36}, tetragonal tP106-Nd{sub 17}Au{sub 36} type, melting point 1170 C; Nd{sub 14}Au{sub 51}, hexagonal hP65-Gd{sub 14}Ag{sub 51} type, melting point 1210 C; and NdAu{sub 6}, monoclinic mC28-PrAu{sub 6} type, peritectic decomposition at 875 C. Four eutectic reactions were found, respectively, at 19.0 at. pct Au and 655 C, at 63.0 at. pct Au and 1080 C, at 72.0 at. pct Au and 1050 C, and, finally, at 91.0 at. pct Au and 795 C. A catatectic decomposition of the ({beta}Nd) phase, at 825 C and {approx}1 at. pct Au, was also found. The results are briefly discussed and compared to those for the other rare earth-gold (R-Au) systems. A short discussion of the general alloying behavior of the coinage metals (Cu, Ag, and Au) with the rare-earth metals is finally presented.

Saccone, A.; Maccio, D.; Delfino, S.; Ferro, R. [Sezione di Chimica Inorganicae Metallurgia, Genova (Italy)

1999-05-01

367

An Empirical HR Diagram for WN Stars  

NASA Astrophysics Data System (ADS)

The one-dimensional WN classification defined by Smith (1968, MNRAS 138, 109), based primarily on the relative strengths of Nsiii -- Nsv lines, has been described as unsuccessful because it fails to define a unique luminosity and temperature for a given spectral type (e.g. Conti ea 1983, ApJ 268, 228). Part of the problem lies in the lumping of ``weak'' and ``strong'' lined stars (Hiltner & Schild 1966, ApJ 143,770 ``A'' and ``B'' types) into the same spectral bins. Recently Hamann, Koesterke, & Wessolowski (1993, AA 274, 397) (HKW) have determined the luminosities and temperatures for 60% of the 71 apparently single WN stars in the updated Sixth Galactic WR Catalog of van der Hucht ea (1988, AA 199, 217), from the equivalent widths (EW) of Hesiilam 5412 and Hesilam 5876. I use their data to plot the EW_{lambda 5412} as a function of the ratio EW_{lambda 5412} / EW_{lambda 5876}. This plot shows a clear separation between ``weak'' lined and ``strong'' lined WN stars with a dividing line at EW_{lambda 5412} = --35 Angstroms. Both the strong and weak line sequences follow the N ionization classification along their respective curves. There is also a hint of a further bifurcation in the weak line sequence. I argue that this is an empirical HR diagram for the WN stars because for each sequence (weak and strong); there is a linear correlation between temperature and the equivalent width ratio, and an inverse linear correlation between the absolute visual magnitude and the EW_{lambda 5412}. (This second correlation is just the ``Baldwin Effect'' for WR stars; noted by Morris ea 1993, ApJ 414, L25). I will discuss a similar classification system by Smith, Shara, & Moffat (1995, IAUSymp 163, 48) who have suggested using the FWHM of Hesiilam 4686 in place of EW_{lambda 5412} and an additional third dimension measuring the H/He abundance ratio. I will also discuss the use of alternate luminosity (EW_{lambda 4686}) and temperature (EW_{lambda 4686} / EW_{lambda 10830}) indicators. This work has been supported by NAG5-619.

McCandliss, Stephan R.

1995-05-01

368

Geometrical Approach to the Evaluation of Multileg Feynman Diagrams  

NASA Astrophysics Data System (ADS)

A connection between one-loop N-point Feynman diagrams and certain geometrical quantities in non-Euclidean geometry is discussed. A geometrical way to calculate the corresponding Feynman integrals is considered.

Davydychev, Andrei I.; Delbourgo, Robert

1998-10-01

369

8. Photocopy of top half of an 1855 organizational diagram ...  

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

8. Photocopy of top half of an 1855 organizational diagram of the New York and Erie Railroad. Original in the collections of the Library of Congress. - Erie Railway, New Jersey, New York, Pennsylvania, Deposit, Broome County, NY

370

9. Photocopy of bottom half of an 1855 organizational diagram ...  

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

9. Photocopy of bottom half of an 1855 organizational diagram of the New York and Erie Railroad. Original in the collections of the Library of Congress. - Erie Railway, New Jersey, New York, Pennsylvania, Deposit, Broome County, NY

371

22. Power plant engine pipingcompressed air piping diagram and sections, ...  

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

22. Power plant engine piping-compressed air piping diagram and sections, sheet 81 of 130 - Naval Air Station Fallon, Power Plant, 800 Complex, off Carson Road near intersection of Pasture & Berney Roads, Fallon, Churchill County, NV

372

TOPICAL REVIEW: The Hopf algebra approach to Feynman diagram calculations  

Microsoft Academic Search

The Hopf algebra structure underlying Feynman diagrams which governs the process of renormalization in perturbative quantum field theory is reviewed. Recent progress is briefly summarized with an emphasis on further directions of research.

Kurusch Ebrahimi-Fard; Dirk Kreimer

2005-01-01

373

Exercises in Drawing and Utilizing Free-Body Diagrams.  

ERIC Educational Resources Information Center

Finds that students taking algebra-based introductory physics have difficulty with one- and two-body problems in particle mechanics. Provides graded exercises for drawing and utilizing free-body diagrams. (CCM)

Fisher, Kurt

1999-01-01

374

High-temperature phase diagram of sodium chloride  

NASA Astrophysics Data System (ADS)

The critical point is calculated and a high-temperature phase diagram is constructed for sodium chloride with allowance for the structural phase transition between B1 and B2 polymorphs of NaCl crystal.

Savintsev, A. P.; Gavasheli, Yu. O.

2011-11-01

375

Airbus A320 Braking as Predicate-Action Diagrams  

Microsoft Academic Search

We use the Predicate-Action Diagrams of Lamport to express the de- scription of the operation of the Airbus A320 braking systems contained in the Flight Crew Operating Manual. This helps identify ambiguities and incompleteness.

Peter B. Ladkin

376

Temperature control in continuous furnace by structural diagram method  

NASA Technical Reports Server (NTRS)

The fundamentals of the structural diagram method for distributed parameter systems (DPSs) are presented and reviewed. An example is given to illustrate the application of this method for control design.

Xia, Lei; Hartley, Tom T.

1991-01-01

377

Heuristic Diagrams as a Tool to Teach History of Science  

NASA Astrophysics Data System (ADS)

The graphic organizer called here heuristic diagram as an improvement of Gowin's Vee heuristic is proposed as a tool to teach history of science. Heuristic diagrams have the purpose of helping students (or teachers, or researchers) to understand their own research considering that asks and problem-solving are central to scientific activity. The left side originally related in Gowin's Vee with philosophies, theories, models, laws or regularities now agrees with Toulmin's concepts (language, models as representation techniques and application procedures). Mexican science teachers without experience in science education research used the heuristic diagram to learn about the history of chemistry considering also in the left side two different historical times: past and present. Through a semantic differential scale teachers' attitude to the heuristic diagram was evaluated and its usefulness was demonstrated.

Chamizo, José A.

2012-05-01

378

Influence diagrams as oil spill decision science tools  

EPA Science Inventory

Making inferences on risks to ecosystem services (ES) from ecological crises can be more reliably handled using decision science tools. Influence diagrams (IDs) are probabilistic networks that explicitly represent the decisions related to a problem and evidence of their influence...

379

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

380

Workshop on Applications of Phase Diagrams in Metallurgy and Ceramics.  

National Technical Information Service (NTIS)

A workshop was held at the National Bureau of Standards, Gaithersburg, Md., January 10-12, 1977, to assess the current national and international status of phase diagram determinations and evaluations for alloys, ceramics and semiconductors; to determine ...

L. H. Bennett G. C. Carter

1977-01-01

381

Zeroes of Wronskians of Hermite polynomials and Young diagrams  

Microsoft Academic Search

For a certain class of partitions, a simple relation is observed between the\\u000ashape of the Young diagram and the pattern of zeroes of the Wronskian of the\\u000acorresponding Hermite polynomials.

G. Felder; A. D. Hemery; A. P. Veselov

2010-01-01

382

75 FR 61512 - Outer Continental Shelf Official Protraction Diagrams  

Federal Register 2010, 2011, 2012, 2013

...publication, the following NAD 83-based Outer Continental Shelf Official Protraction Diagrams (OPDs) located within Atlantic Ocean areas, with revision dates as indicated, are now available. The BOEMRE in accordance with its authority and...

2010-10-05

383

Commercial SNF Accident Release Fractions  

SciTech Connect

The purpose of this analysis is to specify and document the total and respirable fractions for radioactive materials that could be potentially released from an accident at the repository involving commercial spent nuclear fuel (SNF) in a dry environment. The total and respirable release fractions are used to support the preclosure licensing basis for the repository. The total release fraction is defined as the fraction of total commercial SNF assembly inventory, typically expressed as an activity inventory (e.g., curies), of a given radionuclide that is released to the environment from a waste form. Radionuclides are released from the inside of breached fuel rods (or pins) and from the detachment of radioactive material (crud) from the outside surfaces of fuel rods and other components of fuel assemblies. The total release fraction accounts for several mechanisms that tend to retain, retard, or diminish the amount of radionuclides that are available for transport to dose receptors or otherwise can be shown to reduce exposure of receptors to radiological releases. The total release fraction includes a fraction of airborne material that is respirable and could result in inhalation doses; this subset of the total release fraction is referred to as the respirable release fraction. Accidents may involve waste forms characterized as: (1) bare unconfined intact fuel assemblies, (2) confined intact fuel assemblies, or (3) canistered failed commercial SNF. Confined intact commercial SNF assemblies at the repository are contained in shipping casks, canisters, or waste packages. Four categories of failed commercial SNF are identified: (1) mechanically and cladding-penetration damaged commercial SNF, (2) consolidated/reconstituted assemblies, (3) fuel rods, pieces, and debris, and (4) nonfuel components. It is assumed that failed commercial SNF is placed into waste packages with a mesh screen at each end (CRWMS M&O 1999). In contrast to bare unconfined fuel assemblies, the container that confines the fuel assemblies could provide an additional barrier for diminishing the total release fraction should the fuel rod cladding breach during an accident. This analysis, however, does not take credit for the additional barrier and establishes only the total release fractions for bare unconfined intact commercial SNF assemblies, which may be conservatively applied to confined intact commercial I SNF assemblies.

J. Schulz

2004-11-05

384

The Fukushima Daiichi Accident Study Information Portal  

SciTech Connect

This paper presents a description of The Fukushima Daiichi Accident Study Information Portal. The Information Portal was created by the Idaho National Laboratory as part of joint NRC and DOE project to assess the severe accident modeling capability of the MELCOR analysis code. The Fukushima Daiichi Accident Study Information Portal was created to collect, store, retrieve and validate information and data for use in reconstructing the Fukushima Daiichi accident. In addition to supporting the MELCOR simulations, the Portal will be the main DOE repository for all data, studies and reports related to the accident at the Fukushima Daiichi nuclear power station. The data is stored in a secured (password protected and encrypted) repository that is searchable and accessible to researchers at diverse locations.

Shawn St. Germain; Curtis Smith; David Schwieder; Cherie Phelan

2012-11-01

385

Ethnic differences in accident rates at work.  

PubMed Central

The accidents at work of 4482 employees in a car engine machining and assembly plant in south east England were studied retrospectively over a 12 month period. The study population was composed of Asian (22%), white (66%), and West Indian employees (12%). The crude accident rates differed among the groups, the means being Asians 1.58, white 1.23, and West Indians 1.28. There was, however, no consistent ethnic difference after adjustment for other factors such as age, type of job, and duration of service. Accident rates were higher in those employees who were younger, newly employed, and in production jobs. The findings of this research imply that accident prevention programmes should be directed to those factors known to relate to accidents and not to any specific ethnic group.

Baker, C C

1987-01-01

386

Human Factors in Cabin Accident Investigations  

NASA Technical Reports Server (NTRS)

Human factors has become an integral part of the accident investigation protocol. However, much of the investigative process remains focussed on the flight deck, airframe, and power plant systems. As a consequence, little data has been collected regarding the human factors issues within and involving the cabin during an accident. Therefore, the possibility exists that contributing factors that lie within that domain may be overlooked. The FAA Office of Accident Investigation is sponsoring a two-day workshop on cabin safety accident investigation. This course, within the workshop, will be of two hours duration and will explore relevant areas of human factors research. Specifically, the three areas of discussion are: Information transfer and resource management, fatigue and other physical stressors, and the human/machine interface. Integration of these areas will be accomplished by providing a suggested checklist of specific cabin-related human factors questions for investigators to probe following an accident.

Chute, Rebecca D.; Rosekind, Mark R. (Technical Monitor)

1996-01-01

387

The Life Cycle of the Star/H-R Diagram  

NSDL National Science Digital Library

This is a great resources with online lessons providing student inquiry as they learn about the life cycle of the star as well as the usages of the H-R diagram. The images provide students a conceptual understanding of the life cycle of the star and how it applies to the H-R diagram. My students enjoyed the interactive lab tools as well as the online formative assessment questions.

Http://www.cpet.ufl.edu/sift/

2011-10-14

388

CUEMAP: A tool for generating hierarchical charts and dataflow diagrams  

SciTech Connect

CUEMAP is a preprocessor to the MAPPER program, which generates report quality visual aids. CUEMAP uses text blocks, symbols, and line connectors to lay out hierarchical charts and dataflow diagrams. A grid is specified as a reference point on which the labels and symbols can be placed. Connectors are added to complete the diagram. Modifications and enhancements require knowledge of the MAPPER syntax. 1 ref., 2 figs.

Lee, J.W.

1987-12-01

389

Evaluation of multi-box diagrams in six dimensions  

NASA Astrophysics Data System (ADS)

We present a simple method which simplifies the evaluation of the on-shell multiple box diagrams reducing them to triangle type ones. For the L-loop diagram one gets the expression in terms of Feynman parameters with 2 L-fold integration. As examples we consider the 2 and 3 loops cases, the numerical integration up to six loops is also presented. The method is valid in six dimensions where neither UV not IR divergences appear.

Kazakov, D. I.

2014-04-01

390

Towards a Cosmological Hubble Diagram for Type II-PSupernovae  

Microsoft Academic Search

We present the first high-redshift Hubble diagram for Type II-P supernovae (SNe II-P) based upon five events at redshift upto z â0.3. This diagram was constructed using photometry from the Canada-France-Hawaii Telescope Supernova Legacy Survey and absorption line spectroscopy from the Keck observatory. The method used to measure distances to these supernovae is based on recent work by Hamuy&Pinto (2002)

Peter Nugent; Mark Sullivan; Richard Ellis; Avishay Gal-Yam; Douglas C. Leonard; D. Andrew Howell; Pierre Astier; Raymond G. Carlberg; Alex Conley; Sebastien Fabbro; Dominique Fouchez; James D. Neill; Reynald Pain; Kathy Perrett; Chris J. Pritchet; Nicolas Regnault

2006-01-01

391

Toward a Cosmological Hubble Diagram for Type IIP Supernovae  

Microsoft Academic Search

We present the first high-redshift Hubble diagram for Type II-P supernovae (SNe II-P) based on five events at redshift up to z~0.3. This diagram was constructed using photometry from the Canada-France-Hawaii Telescope Supernova Legacy Survey and absorption-line spectroscopy from the Keck Observatory. The method used to measure distances to these supernovae is based on recent work by Hamuy & Pinto

Peter Nugent; Mark Sullivan; Richard Ellis; Avishay Gal-Yam; Douglas C. Leonard; D. Andrew Howell; Pierre Astier; Raymond G. Carlberg; Alex Conley; Sebastien Fabbro; Dominique Fouchez; James D. Neill; Reynald Pain; Kathy Perrett; Chris J. Pritchet; Nicolas Regnault

2006-01-01

392

A spinor technique in symbolic Feynman diagram calculation mesons  

SciTech Connect

The authors present a recursive diagrammatic method for evaluating tree-level Feynman diagrams involving multi-fermions which interact through gauge bosons (gluons or photons). Based on this method, a package called COMPUTE, which can generate and calculate all the possible Feynman diagrams for exclusive processes in perturbative QCD, has been developed (available in both Mathematics and Maple). As an example, a calculation of the nucleon Compton scattering amplitude is given.

A. Pang; C. Ji

1994-02-17

393

Blockm-a block diagram modelling interface and its applications  

Microsoft Academic Search

A MATLAB-based menu-driven multi-input multi-output linear system block diagram modeling program called BLOCKM is presented. This program can be used very easily to enter complicated models described in block diagram form. The state-space representation of the system can then easily be found and processed in the MATLAB environment. The F-14 benchmark problem is used as an example to show the

D. Xue; D. P. Atherton

1992-01-01

394

Selecting samples for paleointensity measurements with FORC diagrams  

Microsoft Academic Search

Paleointensity data are vital for a better knowledge of deep-earth processes. The paleointensity database is limited by the high failure rate of paleointensity analysis. Excluding thermal alteration, failure is usually caused by the presence of multi-domain (MD) grains and interactions among grains, two properties that can be identified using first-order reversal curve (FORC) diagrams. We measured FORC diagrams on about

C. Carvallo; A. Roberts; R. Leonhardt; C. Laj; C. Kissel; M. Perrin; P. Camps

2005-01-01

395

Semantic specification and verification of data flow diagrams  

Microsoft Academic Search

Data Flow Diagram (DFD) has been widely used in Software Engineering as means of requirement analysis and system specification.\\u000a However, one defect of DFD approach remains untackled: the lack of formal semantics has brought about a lot of problems. In\\u000a this paper, we model Data Flow Diagram as networks of concurrent processes. With the use of temporal logic language XYZ\\/E,

Tong Liu; C. S. Tang

1991-01-01

396

Modelling the phase diagram of magnetic shape memory Heusler alloys  

Microsoft Academic Search

We have modelled the phase diagram of magnetic shape memory alloys of the Heusler type by using the phenomenological Ginzburg–Landau theory. When fixing the parameters by realistic values taken from experiment we are able to reproduce most details of, for example, the phase diagram of Ni2+xMn1?xGa in the (T, x) plane. We present the results of ab initio calculations of

P Entel; V D Buchelnikov; V V Khovailo; A T Zayak; W A Adeagbo; M E Gruner; H C Herper; E F Wassermann

2006-01-01

397

Transport Phase Diagram of Homogeneously Disordered Superconducting Thin Films  

Microsoft Academic Search

We have constructed a phase diagram in temperature-magnetic field-disorder space for homogeneously disordered superconducting tantalum thin films. Phases are phenomenologically identified by the nonlinear transport characteristics that are unique in each phase. The resulting phase diagram shows that a direct superconductor-insulator transition is prohibited at any disorder because the superconducting phase is completely surrounded by the intervening metallic phase.

Yize Li; Carlos L. Vicente; Jongsoo Yoon

2009-01-01

398

Multivectors: Nine components represented on a ternary diagram  

NASA Astrophysics Data System (ADS)

Methods of graphical representation of data need to keep pace with increasingly complex data manipulation. Conventional ternary diagrams allow the presentation of three components as a point in a plane. Multivector diagrams allow plotting of up to nine components in one ternary diagram by representing compositions not as points but as vectors sharing a "triple-point". The triple point represents the composition of three sets of three components (triads). The vector arms represent the composition within triads. Multivector diagrams can be used to illustrate individual samples or multiple samples. The techniques for computing, plotting, reading and interpreting multiple vectors follow the same rules as a conventional ternary diagram such that any of the nine components or groups of components can be compared directly or with the aid of simple projections. Although the mathematical and statistical implications of this graphical representation are not presented, it is demonstrated that the technique is useful for visual assessment of compositions and key compositional ratios. Multivector diagrams can be applied to any system where a graphical representation of up to nine components may be useful. Multivectors are applied to examples from whole rock geochemistry, whole rock modal mineralogy, mineral alteration, chemical weathering and groundwater chemistry.

Smith, John V.; Beermann, Eberhard

2006-04-01

399

49 CFR 837.3 - Published reports, material contained in the public accident investigation dockets, and accident...  

Code of Federal Regulations, 2010 CFR

...investigation dockets, and accident database data. 837.3 Section... PRODUCTION OF RECORDS IN LEGAL PROCEEDINGS § 837.3...investigation dockets, and accident database data. (a) Demands for...or its computerized accident database(s) shall be...

2010-10-01

400

49 CFR 837.3 - Published reports, material contained in the public accident investigation dockets, and accident...  

Code of Federal Regulations, 2010 CFR

...investigation dockets, and accident database data. 837.3 Section... PRODUCTION OF RECORDS IN LEGAL PROCEEDINGS § 837.3...investigation dockets, and accident database data. (a) Demands for...or its computerized accident database(s) shall be...

2009-10-01

401

[Iodine prophylaxis following nuclear accidents].  

PubMed

Radioactive iodine isotopes may be released to air to a varying degree during accidents with nuclear reactors. Iodine tablets, taken before or shortly after such release, protect against intake of radioactive iodine isotopes, but not against other radionuclides. Iodine prophylaxis can be a relevant countermeasure in Norway and will be implemented according to recommendations from the Crisis Committee for Nuclear and Radiological Emergencies. The Chernobyl accident confirmed that the risk for radiogenic thyroid cancer is much higher for foetuses and children and adolescents under 18 years. An epidemiological study showed that intake of iodine tablets could reduce the risk for thyroid cancer by a factor of three. For children, the WHO has therefore recommended a 10 mGy avertable dose to the thyroid. The Norwegian Radiation Protection Authority acknowledge the WHO guidelines and advise that the first priority of all emergency preparedness planning for potential releases that can cause dispersion of radioactive iodine, should be given to the protection of pregnant and breast-feeding women, newborns and children under 18 years. Iodine tablets should be taken immediately (preferably not later than a few hours) in situations where inhalation of radioactive iodine may occur. It should be underlined that iodine prophylaxis is one of several emergency countermeasures; other measures are sheltering and evacuation. The latter two countermeasures will protect not only from intake of radioactive iodine, but also against other radionuclides that may be released. Based on the present risk assessment in Norway, iodine tablets have been distributed to the counties north of Salten. In addition, there is an emergency stockpile of iodine tablets in Oslo. PMID:17205086

Jaworska, Alicja

2007-01-01

402

[A study on fall accident].  

PubMed

The study was conducted from November 1995 to May 1996 at the one general hospital in Seoul. The total subjects of this study were 412 patients who have the experience of fall accident, among them 31 was who have fallen during hospitalization and 381 was who visited emergency room and out patient clinic. The purposes of this study were to determine the characteristics, risk factors and results of fall accident and to suggest the nursing strategies for prevention of fall. Data were collected by reviewing the medical records and interviewing with the fallers and their family members. For data analysis spss/pc+ program was utilized for descriptive statistics, adjusted standardized X2-test. The results of this study were as follows: 1) Total subjects were 412 fallers, of which 245 (59.5%) were men and 167 (40.5%) were women. Age were 0-14 years 79 (19.2%), 15-44 years 125 (30.4%), 45-64 years 104 (25.2%), over 65 years 104 (25.2%). 2) There was significant association between age and the sexes (X2 = 39.17, P = 0.00). 3) There was significant association between age and history of falls (X2 = 44.41, P = .00). And history of falls in the elderly was significantly associated with falls. 4) There was significant association with age and medical diagnosis (X2 = 140.66, P = .00), chief medical diagnosis were hypertension (34), diabetes mellitus (22), arthritis (11), stroke (8), fracture (7), pulmonary tuberculosis (6), dementia (5) and cataract (5). 5) There was significant association between age and intrinsic factors: cognitive impairment, mobility impairment, insomnia, emotional problems, urinary difficulty, visual impairments, hearing impairments, use of drugs (sedatives, antihypertensive drugs, diuretics, antidepressants) (P < 0.05). But there was no significant association between age and dizziness (X2 = 2.87, P = .41). 6) 15.3% of total fallers were drunken state when they were fallen. 7) Environmental factors of fall accident were unusual posture (50.9%), slips (35.2%), trips (9.5%) and collision (4.4%). 8) Most of falls occurred during the day time, peak frequencies of falls occurred from 1 pm to 6 pm and 7 am to 12 am. 9) The places of fall accident were roads (22.6%), house-stairs (16.7%), rooms, floors, kitchen (11.2%), the roof-top, veranda, windows (10.9%), hospital (7.5%), ice or snowy ways (5.8%), bathroom (4.9%), playground, park (4.9%), subway-stairs (4.4%) and public-bathrooms (2.2%). 10) Activities at the time of fall accident were walking (37.6%), turning around or reaching for something (20.9%), going up or down stairs (19.2%), exercise, working (17.4%), up or down from a bed (2.7%), using wheelchair or walking aids, standing up or down from a chair (2.2%) and standing still (2.2%). 11) Anatomical locations of injuries by falls were head, face, neck (31.3%), lower extremities (29.9%), upper extremities (20.6%), spine, thorax, abdomen or pelvic contents (11.4%) and unspecified (2.9%). 12) Types of injures were fracture (47.6%), bruises (13.8%), laceration (13.3%), sprains (9.0%), headache (6.6%), abrasions (2.9%), intracranial hemorhage (2.4%) and burns (0.5%). 13) 41.5% of the fallers were hospitalized and average of hospitalization was 22.3 days. 14) The six fallers (1.46%) died from fall injuries. The two fallers died from intracranial hemorhage and the four fallers died of secondary infection; pneumonia (2), sepsis (1) and cellulitis (1). It is suggested that 1) Further study is needed with larger sample size to identify the fall risk factors. 2) After the fall accident, comprehensive nursing care and regular physical exercise should be emphasized for the elderly person. 3) Safety education and safety facilities of the public place and home is necessary for fall prevention. PMID:10437605

Lee, H S; Kim, M J

1997-01-01

403

What can we learn by comparing students' diagram-construction processes with the mathematical conceptions inferred from their explanations with completed diagrams?  

NASA Astrophysics Data System (ADS)

Despite recent research interest in student-created diagrams, little research has systematically investigated students' diagram-construction processes, meaning the order and manner in which students create markings as they physically generate diagrams. In this study, we characterize the various processes students use to create diagrams that represent a quadratic motion situation involving increasing speed, and we explore how these diagram-construction processes are related to students' conceptions of speed as inferred from their explanations with their completed diagrams. Previous literature suggests contrasting predictions regarding whether or not students' diagram-construction processes are closely related (from our perspective as researchers) to students' inferred conceptions. We see the study as having value for research and practice by raising new questions related to diagram-construction processes, pointing to the potential formative assessment value of attending to diagram-construction processes, and demonstrating the need for the development of theory to explain the relationships identified by this study.

Lobato, Joanne; Hohensee, Charles; Diamond, Jaime Marie

2014-01-01

404

OntoDiagram: automatic diagram generation for congenital heart defects in pediatric cardiology.  

PubMed

In pediatric cardiology as well as many other medical specialties, the accurate portrayal of a large volume of patient information is crucial to providing good patient care. Our research aims at utilizing clinical and spatial ontologies representing the human heart, to automatically generate a Mullins-like diagram based on a patient's information in the cardiology databases. Our ontology allows an intuitive way of modeling congenital defects with the structure of the human heart. A prototype system has been implemented using Protege and the Java Advanced Imaging package , and is currently under testing at the Children's Mercy Hospitals and Clinics. A pilot study showed the diagrammatical representation and characterization of congenital heart defects can be used to facilitate a better understanding of a complex congenital heart defects. PMID:16779141

Vishwanath, Kartik; Viswanath, Venkatesh; Drake, William; Lee, Yugyung

2005-01-01

405

MORT User's Manual for use with the Management Oversight and Risk Tree analytical logic diagram. [Contains a list of System Safety Development Center publications  

SciTech Connect

This report contains the User's Manual for MORT (Management Oversight and Risk Tree), a logic diagram in the form of a work sheet'' that illustrates a long series of interrelated questions. MORT is a comprehensive analytical procedure that provides a disciplined method for determining the causes and contributing factors of major accidents. Alternatively, it serves as a tool to evaluate the quality of an existing system. While similar in many respects to fault tree analysis, MORT is more generalized and presents over 1,500 specific elements of an ideal universal'' management program for optimizing environment, safety and health, and other programs. This User's Manual is intended to be used with the MORT diagram dated February 1992.

Knox, N.W.; Eicher, R.W.

1992-02-01

406

An analysis of aircraft accidents involving fires  

NASA Technical Reports Server (NTRS)

All U. S. Air Carrier accidents between 1963 and 1974 were studied to assess the extent of total personnel and aircraft damage which occurred in accidents and in accidents involving fire. Published accident reports and NTSB investigators' factual backup files were the primary sources of data. Although it was frequently not possible to assess the relative extent of fire-caused damage versus impact damage using the available data, the study established upper and lower bounds for deaths and damage due specifically to fire. In 12 years there were 122 accidents which involved airframe fires. Eighty-seven percent of the fires occurred after impact, and fuel leakage from ruptured tanks or severed lines was the most frequently cited cause. A cost analysis was performed for 300 serious accidents, including 92 serious accidents which involved fire. Personal injury costs were outside the scope of the cost analysis, but data on personnel injury judgements as well as settlements received from the CAB are included for reference.

Lucha, G. V.; Robertson, M. A.; Schooley, F. A.

1975-01-01

407

Childhood accidents: epidemiology, trends, and prevention.  

PubMed Central

Accidents are the most common cause of death in children over one year of age. Prevention remains a high priority. We have reviewed the current epidemiology of childhood accidents and their prevention, and made recommendations for the future. In 1992, 559 children died in United Kingdom as a result of an accidents--240 from road traffic accidents and 100 from burns and scalds. Every year 50 children drown. Accidents cause significant disability to children. Many children, up to one in four of the population in urban areas, attend accident and emergency departments, and 5-10% of these are admitted to hospital. Accident risk factors include low social class, psychosocial stress, an unsafe environment, and child developmental disorders. Research has shown that prevention is best achieved by making the child's environment safer, often through legislation. Insufficient resources have been put into both research into childhood injuries and preventive work in communities. Collaboration between health authorities, NHS trusts, local authorities and community networks is vital if success is to be achieved. A national safety agenda for children would focus the attention that this problem deserves.

Kemp, A; Sibert, J

1997-01-01

408

Evaluation of a severe accident management strategy for boiling water reactors -- Drywell flooding  

SciTech Connect

Flooding of the drywell has been suggested as a strategy to prevent reactor vessel and containment failure in boiling water reactors. To evaluate the candidate strategy, this study considers accident management as a decision problem ( drywell flooding'' versus do nothing'') and develops a decision-oriented framework, namely, the influence diagram approach. This analysis chooses the long-term station blackout sequence for a Mark 1 nuclear power plant (Peach Bottom), and an influence diagram with a single decision node is constructed. The node probabilities in the influence diagram are obtained from US Nuclear Regulatory Commission reports or estimated by probabilistic risk assessment methodology. In assessing potential benefits compared with adverse effects, this analysis uses two consequence measures, i.e., early and late fatalities, as decision criteria. The analysis concludes that even though potential adverse effects exist, such as ex-vessel steam explosions and containment isolation failure, the drywell flooding strategy is preferred to do nothing'' when evaluated in terms of these consequence measures.

Yu, D.; Xing, L.; Kastenberg, W.E.; Okrent, D. (Univ. of California, Los Angeles, CA (United States). Mechanical, Aerospace, and Nuclear Engineering Dept.)

1994-05-01

409

ARAMIS project: a more explicit demonstration of risk control through the use of bow-tie diagrams and the evaluation of safety barrier performance.  

PubMed

Over the last two decades a growing interest for risk analysis has been noted in the industries. The ARAMIS project has defined a methodology for risk assessment. This methodology has been built to help the industrialist to demonstrate that they have a sufficient risk control on their site. Risk analysis consists first in the identification of all the major accidents, assuming that safety functions in place are inefficient. This step of identification of the major accidents uses bow-tie diagrams. Secondly, the safety barriers really implemented on the site are taken into account. The barriers are identified on the bow-ties. An evaluation of their performance (response time, efficiency, and level of confidence) is performed to validate that they are relevant for the expected safety function. At last, the evaluation of their probability of failure enables to assess the frequency of occurrence of the accident. The demonstration of the risk control based on a couple gravity/frequency of occurrence is also possible for all the accident scenarios. During the risk analysis, a practical tool called risk graph is used to assess if the number and the reliability of the safety functions for a given cause are sufficient to reach a good risk control. PMID:16107301

de Dianous, Valérie; Fiévez, Cécile

2006-03-31

410

1995 Accident Sequence Precursor (ASP) Program results  

SciTech Connect

The Accident Sequence Precursor (ASP) Program involves the systematic review and evaluation of operational events that have occurred at light-water reactors to identify and categorize precursors to potential severe core damage accident sequences. The results of the ASP Program are published in an annual report. The most recent report, which contains the precursors for 1995, is NUREG/CR-4674, Volume 23, Precursors to Potential Severe Core Damage Accidents: 1995, A Status Report, published in April 1997. This article provides an overview of the ASP review and evaluation process and a summary of the results for 1995.

Muhlheim, M.D.; Belles, R.J.; Cletcher, J.W.; Copinger, D.A. [Oak Ridge National Lab., TN (United States); O`Reilly, P.D. [Nuclear Regulatory Commission, Washington, DC (United States); Dolan, B.W.; Minarick, J.W. [Science Applications International Corp., Oak Ridge, TN (United States)

1997-01-01

411

Warning: accident at Three Mile Island  

SciTech Connect

A reporter and an engineer reconstruct the events leading up to and following the March, 1979 accident at the Three Mile Island Reactor Number Two. They begin with the compromises and work pace required in designing, siting, and building a nuclear reactor and the warnings from incidents involving other reactors. The authors give a chronological report of the events and responses during the days following the accident. They view Three Mile Island as a warning that all the safety systems may not work in a future accident. 7 figures. (DCK)

Gray, M.; Rosen, I.

1982-01-01

412

Mine accident liabilities: a Pandora's box  

SciTech Connect

Mine accidents continue to occur despite countless thousands of man-hours devoted to their prevention by company safety professionals, operational personnel and federal and state regulators. They occur because mining is conducted in a hostile environment where there is little margin for error. This article discusses the potential liabilities following a mine accident, including employee or survivor claims, suits by non-employees affected by the accident, losses of production and mining equipment, exposure of the company to federal and state-imposed mine closure, and exposure of the company and its supervisory employees to civil or criminal penalties for violation of federal and state mining laws.

Biddle, T.M.

1985-10-01

413

An Application of CICCT Accident Categories to Aviation Accidents in 1988-2004  

NASA Technical Reports Server (NTRS)

Interventions or technologies developed to improve aviation safety often focus on specific causes or accident categories. Evaluation of the potential effectiveness of those interventions is dependent upon mapping the historical aviation accidents into those same accident categories. To that end, the United States civil aviation accidents occurring between 1988 and 2004 (n=26,117) were assigned accident categories based upon the taxonomy developed by the CAST/ICAO Common Taxonomy Team (CICTT). Results are presented separately for four main categories of flight rules: Part 121 (large commercial air carriers), Scheduled Part 135 (commuter airlines), Non-Scheduled Part 135 (on-demand air taxi) and Part 91 (general aviation). Injuries and aircraft damage are summarized by year and by accident category.

Evans, Joni K.

2007-01-01

414

Incremental recognition in gesture-based and syntax-directed diagram editors  

Microsoft Academic Search

Diagram editing is an attractive application of gestural interfaces and pen-based computers which promise a new input paradigm where users communicate with computers in diagram languages by using gestures. A key problem in building gesture-based diagram editors is the recognition of handsketched diagrams. Existing approaches concentrate either on gesture recognition or on parsing visual languages, there has been a lack

Rui Zhao; Siemens Nixdorf

1993-01-01

415

A DIAGRAM APPROACH TO AUTOMATIC GENERATION OF JSP\\/SERVLET WEB APPLICATIONS  

Microsoft Academic Search

We defined diagrams called Web transition diagrams to rep- resent overall behavior of Web applications. Using these diagrams, we can generate server program type Web ap- plications such as CGI-based Web applications, and server page type Web applications such as ASP-based Web appli- cations. The purpose of this paper is to design Web transi- tion diagrams to represent wider class

Kornkamol Jamroendararasame; Tetsuya Suzuki; Takehiro Tokuda

416

Improvement of EMC by applying ambiguity and environmental diagrams to the design of radar waveforms  

Microsoft Academic Search

A technique for improving the electromagnetic compatibility of a radar system with respect to its operating electromagnetic environment and to assess RF spectrum usage is presented. The technique involves the use of the ambiguity diagram derived from the waveform and the construction of environmental diagrams for the radar. Overlays of the ambiguity diagram upon the environmental diagram, along desired target

M. D. Aasen

1976-01-01

417

Improvement of EMC by Applying Ambiguity and Environmental Diagrams to the Design of Radar Waveforms  

Microsoft Academic Search

A technique for improving the electromagnetic compatibility of a radar system with respect to its operating electromagnetic environment and to assess RF spectrum usage is presented. The technique involves the use of the ambiguity diagram derived from the waveform and the construction of environinental diagrams for the radar. Overlays of the ambiguity diagram upon the environmental diagram, along desired target

Marvin Aasen

1976-01-01

418

Analysis of Energy Consumption in 159 Countries by Triangular Pyramid Diagram  

Microsoft Academic Search

We use a triangular diagram (also known as a ternary diagram) and triangular pyramid diagram (TPD) to analyze energy consumption data by energy type. To consider the energy problem, it is important to understand the energy type breakdown of the energy consumption. A triangular diagram is effective for the analysis of data of three different energy types. We can classify

Kotoh Hiroshi; Yanai Hiroshi

419

Shuttle accident stalls science plans  

NASA Astrophysics Data System (ADS)

Plans to make 1986 a uniquely productive year for U.S. space science activities ended in one horrible moment with the January 28, 1986, explosion of the space shuttle Challenger. The joyless scene at Cape Canaveral, Fla., stood in sharp contrast to the overwhelming success of Voyager 2 in its encounter with Uranus 4 days earlier. (Scientific details of that encounter will follow in upcoming issues of Eos.)Of the 15 space shuttle flights planned for fiscal year 1986, beginning October 1, 1985, a total of seven were to have carried scientific payloads for the National Aeronautics and Space Administration (NASA). The remaining eight flights were evenly divided between missions for the U.S. Department of Defense and commercial missions for NASA's paying customers. The explosion caused NASA to put its entire space shuttle program on hold to allow time for engineers to find the cause of the accident and for NASA to implement corrective measures. As Eos went to press, NASA acting administrator William R. Graham had not yet released the names of those who would serve on the formal investigative panel. “I think everybody's agreed that it will take weeks to months to unravel,” said Alexander Dessler, director of the space science laboratory at NASA's Marshall Space Flight Center near Huntsville, Ala. Dessler speculated that investigators would begin with a list of hundreds of possible causes for the explosion.

Katzoff, Judith A.

420

Structural assessment of accident loads  

SciTech Connect

Structural assessments were made for specific accident loads for specific catch, receiver, and storage tanks. The evaluation herein represents level-of-effort order-of-magnitude estimates of limiting loads that would lead to collapse or rupture of the tank and unmitigated loss of confinement for the waste. Structural capacities were established using failure criteria. Compliance with codes such as ACI, ASCE, ASME, RCRA, UBC, WAC, and DOE Orders was `NOT` maintained. Normal code practice is to prevent failure with margins consistent with expected variations in loads and strengths and confidence in analysis techniques. The evaluation herein represent estimates of code limits without code load factors or code strength reduction factors, and loading beyond such a limit is considered as an onset of some failure mode. The exact nature of the failure mode and its relation to a safe condition is a judgment of the analyst. Consequently, these `RESULTS SHALL NOT BE USED TO ESTABLISH OPERATING OR SAFETY LOAD LIMITS FOR THESE TANKS`.

Wagenblast, G.R., Westinghouse Hanford

1996-05-28

421

Loss of Coolant Accident Testing Round Robin.  

National Technical Information Service (NTIS)

A loss of coolant accident (LOCA) round robin test program was conducted to evaluate experimental variations and experimental practices associated with the post quench ductility and breakaway oxidation testing techniques. A common set of high level parame...

B. Dunn D. Lutz D. J. Park E. Perez-Fero H. K. Yueh M. LeSaux R. J. Comstock Y. Yan Y. P. Lin

2013-01-01

422

Ethical considerations in accident and emergency research  

Microsoft Academic Search

This is the third paper on research in accident and emergency medicine. It discusses the ethical issues in emergency medicine with particular regard to informed consent and the privacy of subjects and patients.

P A Nee; R D Griffiths

2002-01-01

423

Aircraft Accidents Investigation and Prevention: Selected References.  

National Technical Information Service (NTIS)

The listing of references was compiled at the request of the Transportation Safety Institute, Aeronautical Center. It up-dates the Library's Bibliographic List No. 1 of aircraft accident references dated January, 1964. Indexes and bibliographic lists thro...

1971-01-01

424

MELCOR analysis of the TMI-2 accident  

SciTech Connect

This paper describes the analysis of the Three Mile Island-2 (TMI-2) standard problem that was performed with MELCOR. The MELCOR computer code is being developed by Sandia National Laboratories for the Nuclear Regulatory Commission for the purpose of analyzing severe accident in nuclear power plants. The primary role of MELCOR is to provide realistic predictions of severe accident phenomena and the radiological source team. The analysis of the TMI-2 standard problem allowed for comparison of the model predictions in MELCOR to plant data and to the results of more mechanistic analyses. This exercise was, therefore valuable for verifying and assessing the models in the code. The major trends in the TMI-2 accident are reasonably well predicted with MELCOR, even with its simplified modeling. Comparison of the calculated and measured results is presented and, based on this comparison, conclusions can be drawn concerning the applicability of MELCOR to severe accident analysis. 5 refs., 10 figs., 3 tabs.

Boucheron, E.A.

1990-01-01

425

Columbia Accident Investigation Board Report. Volume Six.  

National Technical Information Service (NTIS)

In the course of its inquiry into the February 1, 2003 destruction of the Space Shuttle Columbia, the Columbia Accident Investigation Board conducted a series of public hearings at Houston, Texas; Cape Canaveral, Florida; and Washington, DC. Testimony fro...

D. W. Deal G. S. Hubbard H. W. Gehmann J. L. Barry J. M. Logsdon J. N. Hallock K. W. Hess R. E. Tetrault S. A. Turcotte S. B. Wallace S. E. Widnall S. K. Ride

2003-01-01

426

Review of models applicable to accident aerosols  

SciTech Connect

Estimations of potential airborne-particle releases are essential in safety assessments of nuclear-fuel facilities. This report is a review of aerosol behavior models that have potential applications for predicting aerosol characteristics in compartments containing accident-generated aerosol sources. Such characterization of the accident-generated aerosols is a necessary step toward estimating their eventual release in any accident scenario. Existing aerosol models can predict the size distribution, concentration, and composition of aerosols as they are acted on by ventilation, diffusion, gravity, coagulation, and other phenomena. Models developed in the fields of fluid mechanics, indoor air pollution, and nuclear-reactor accidents are reviewed with this nuclear fuel facility application in mind. The various capabilities of modeling aerosol behavior are tabulated and discussed, and recommendations are made for applying the models to problems of differing complexity.

Glissmeyer, J.A.

1983-07-01

427

Accident Avoidance Skill Training and Performance Testing.  

National Technical Information Service (NTIS)

The purpose of the study was to determine the feasibility of training drivers to acquire skills needed to avoid critical conflict motor vehicle accidents, and to develop the procedures and materials necessary for such training. Basic data were derived fro...

G. R. Hatterick J. R. Bathurst

1976-01-01

428

Historical Survey Of Flight-Testing Accidents  

NASA Technical Reports Server (NTRS)

Report presents study of flight-testing accidents, with emphasis on limitations imposed by human factors. Covers history of flight testing from early lighter-than-air craft (including balloons) to vertical take-off airplanes to space shuttle.

Anderson, Seth B.

1995-01-01

429

Severe Accident Testing of Electrical Penetration Assemblies.  

National Technical Information Service (NTIS)

Tests of three different full-size electrical penetration assemblies (EPAs) were conducted to evaluate their behavior under severe accident conditions that were simulated using steam at elevated temperature and pressure. Leakage, temperature, and cable in...

D. B. Clauss

1989-01-01

430

Modular Telerobot Control System for Accident Response.  

National Technical Information Service (NTIS)

The Accident Response Mobile Manipulator System (ARMMS) is a teleoperated emergency response vehicle that deploys two hydraulic manipulators, five cameras, and an array of sensors to the scene of an incident. It is operated from a remote base station that...

R. J. Anderson D. L. Shirey

1999-01-01

431

Texas Skid Initiated Accident Reduction Program.  

National Technical Information Service (NTIS)

This report details the conception, design and implementation of the Texas Skid Accident Reduction Program. The primary objective was to develop a system which would help each District identify highway segments that are over-represented in wet weather acc...

D. L. Ivey L. I. Griffin J. R. Lock D. L. Bullard

1992-01-01

432

Abnormal Glucose Levels Found in Transportation Accidents.  

National Technical Information Service (NTIS)

The Federal Aviation Administration's Office of Aviation Medicine (OAM) is responsible for the certification of pilots with diabetic conditions. Therefore, it is essential for OAM to monitor pilots involved in fatal accidents for abnormal glucose levels, ...

D. V. Canfield A. K. Chaturvedi H. K. Boren S. J. H. Veronneau V. L. White

2000-01-01

433

Oranges and Peaches: Understanding Communication Accidents in the Reference Interview.  

ERIC Educational Resources Information Center

Librarians often have communication "accidents" with reference questions as initially presented. This article presents linguistic analysis of query categories, including: simple failures of hearing, accidents involving pronunciation or homophones, accidents where users repeat earlier misinterpretations to librarians, and accidents where users…

Dewdney, Patricia; Michell, Gillian

1996-01-01

434

PNNL Results from 2010 CALIBAN Criticality Accident Dosimeter Intercomparison Exercise  

Microsoft Academic Search

This document reports the results of the Hanford personnel nuclear accident dosimeter (PNAD) and fixed nuclear accident dosimeter (FNAD) during a criticality accident dosimeter intercomparison exercise at the CEA Valduc Center on September 20-23, 2010. Pacific Northwest National Laboratory (PNNL) participated in a criticality accident dosimeter intercomparison exercise at the Commissariat a Energie Atomique (CEA) Valduc Center near Dijon, France

Robin L. Hill; Matthew M. Conrady

2011-01-01

435

Accident prediction model for railway-highway interfaces  

Microsoft Academic Search

Considerable past research has explored relationships between vehicle accidents and geometric design and operation of road sections, but relatively little research has examined factors that contribute to accidents at railway-highway crossings. Between 1998 and 2002 in Korea, about 95% of railway accidents occurred at highway-rail grade crossings, resulting in 402 accidents, of which about 20% resulted in fatalities. These statistics

Jutaek Oh; Simon P. Washington; Doohee Nam

2006-01-01

436

Accident proneness among street car motormen and motor coach operators  

Microsoft Academic Search

The accident records of 59 trolley car motormen and 34 motor coach operators were studied over a period of 18 months. The correlation coefficients between various types of accidents are small. Therefore, the theory that accident proneness is a general trait of an individual is not substantiated since a high rate of accidents of one kind does not indicate necessarily

Clarence W. Brown; Edwin E. Ghiselli

1948-01-01

437

Accident prediction models for urban roads.  

PubMed

This paper describes some of the main findings from two separate studies on accident prediction models for urban junctions and urban road links described in [Uheldsmodel for bygader-Del1: Modeller for 3-og 4-benede kryds. Notat 22, The Danish Road Directorate, 1995; Uheldsmodel for bygader- Del2: Modeller for straekninger. Notat 59, The Danish Road Directorate, 1998] (Greibe and Hemdorff, 1995, 1988). The main objective for the studies was to establish simple, practicable accident models that can predict the expected number of accidents at urban junctions and road links as accurately as possible. The models can be used to identify factors affecting road safety and in relation to 'black spot' identification and network safety analysis undertaken by local road authorities. The accident prediction models are based on data from 1036 junctions and 142 km road links in urban areas. Generalised linear modelling techniques were used to relate accident frequencies to explanatory variables. The estimated accident prediction models for road links were capable of describing more than 60% of the systematic variation ('percentage-explained' value) while the models for junctions had lower values. This indicates that modelling accidents for road links is less complicated than for junctions, probably due to a more uniform accident pattern and a simpler traffic flow exposure or due to lack of adequate explanatory variables for junctions. Explanatory variables describing road design and road geometry proved to be significant for road link models but less important in junction models. The most powerful variable for all models was motor vehicle traffic flow. PMID:12504148

Greibe, Poul

2003-03-01

438

Environmental measurements during the TMI-2 accident  

SciTech Connect

Although the environmental consequences of the TMI accident were relatively insignificant, it was a major test of the ability of the involved state and federal radiological agencies to make a coordinated environmental monitoring response. This was accomplished largely on an ad hoc basis under the leadership of DOE. With some fine tuning, it is the basis for today's integrated FRMAP monitoring plan, which would be put into operation should another major accident occur at a US nuclear facility.

Hull, A.P.

1988-01-01

439

Core loss during a severe accident (COLOSS)  

Microsoft Academic Search

The core loss during a severe accident (COLOSS) project is a 3-year shared-cost action which started in February 2000. The project is concerned with the consequences that core degradation, occurring under severe accident conditions, may have on H2 production, melt generation and the source term. Unresolved in-vessel risk-relevant issues are studied, through a large number of experiments such as (a)

B Adroguer; P Chatelard; J. P Van Dorsselaere; C Duriez; N Cocuaud; L Bellenfant; D Bottomley; V Vrtilkova; K Mueller; W Hering; C Homann; W Krauss; A Miassoedov; M Steinbrück; J Stuckert; Z Hozer; G Bandini; J Birchley; T. v Berlepsch; M Buck; J. A. F Benitez; E Virtanen; S Marguet; G Azarian; H Plank; M Veshchunov; Y Zvonarev; A Goryachev

2003-01-01

440

Assessing economic consequences of radiation accidents  

SciTech Connect

This project reviewed the literature on the economic consequences of accidents to determine the availability of assessment methods and data and their applicability to the high-level radioactive waste (HLW) disposal system before closure; determined needs for expansion, revision, or adaptation of methods and data for modeling economic consequences of accidents of the scale projected for the disposal system; and gathered data that might be useful for the needed revisions. 8 refs., 1 tab.

Rowe, M.D.; Lee, J.C.; Grimshaw, C.A.; Kalb, P.D.

1987-01-01

441

Delay in ambulance dispatch to road accidents.  

PubMed

When a road accident occurs, the police communications officer, or 911 operator, generally receives the first call. If the caller reports injuries, the emergency medical services dispatcher is notified immediately; but if the caller is uncertain of injuries, the operator may wait. Most often an ambulance is not needed. However, in nearly 20% of fatal road accidents in Missouri, waiting for confirmation of need resulted in a delay of 5 minutes or more in the dispatch of an ambulance. PMID:1585968

Brodsky, H

1992-06-01

442

The phase diagram of a bilayer Ising model  

NASA Astrophysics Data System (ADS)

The phase diagram of a quasi-2D two-layer Ising lattice, with a variable inter-layer interaction parameter, is determined by phenomenological order-disorder, mean-field (MF), and simplified renormalization group (RG) approaches. Bethe approximation is used to determine phase diagrams of bond-diluted bilayer lattices, exhibiting non-trivial behavior in the presence of short-range correlations between the bonds. The critical behavior is discussed and the problem is shown to belong to the 2D-Ising universality class, for any given value of the inter-layer interaction. The phase diagram is verified by comparison to earlier results, obtained by computer simulations, perturbation series expansion, Bethe-tree approximation and other methods.

Sloutskin, E.; Gitterman, M.

2007-03-01

443

Global phase diagram for binary alloys with one magnetic component  

NASA Astrophysics Data System (ADS)

We describe the global mean-field phase diagram for a binary alloy that contains one magnetic component. We obtain 12 types of system phase diagrams, each of which displays a different interaction of chemical (segregration or ordering) and magnetic (ferromagnetic or antiferromagnetic) long-range order. Our results follow from the known features of the phase diagrams along the symmetric sections of Griffiths's three-component (spin-1) model when both uniform and sublattice ordered states are considered. The multiple-phase coexistence and associated multicritical states of the spin-1 model appear in alloy language linked to previously unknown features such as first-order magnetic to paramagnetic transitions within chemically ordered phases, phase segregation among two magnetically ordered states, and first-order field-induced transitions.

Talanquer, V.; Varea, C.; Robledo, A.

1989-04-01

444

Activated sludge process control--development of operational diagrams.  

PubMed

Hindered batch settling experiments were performed on activated sludge generated from dairy wastewater and combined (Dairy-Domestic mixture 1:3) wastewater for different initial Mixed Liquor Suspended Solids (MLSS) concentrations from 2g/L to 20 g/L for varied Mean Cell Residence Time (MCRT) for 5 to 15 days. Bio kinetic coefficients of combined wastewater were determined using a bench scale Continues Flow Stirred Tank Reactor (CFSTR). Vesilind parameters were also determined experimentally. Operational diagrams for long-term fluctuations in plant inflow and substrate concentration have been prepared. The allowable overflow rate to prevent process failure can be predicted from the chart. The adjustments to be made in recycling ratio and MCRT in case of fluctuations could also be predicted from the operational diagrams. From the operating diagrams plotted for both dairy and combined wastewater, it was noticed that, combined wastewater treatment provide greater operational flexibility than treating dairy waste separately. PMID:17365299

Jeyanthi, J; Saseetharan, M K

2007-02-15

445

Generalized internal multiple imaging (GIMI) using Feynman-like diagrams  

NASA Astrophysics Data System (ADS)

Single scattering events recorded in surface seismic data do not fully illuminate the subsurface structure, especially if it is complicated. In such cases, multiple internal scatterings (internal multiples) can help improve the illumination. We devise a generalized internal multiple imaging (GIMI) procedure that maps internal multiple energy to their true location with a relatively mild addition to the computational cost. GIMI theory relies heavily on seismic interferometry, which often involves cumbersome algebra, especially when one is dealing with high-order terms in the perturbation series. To make the derivations, and inference of the results easier, we introduce Feynman-like diagrams to represent different terms of the perturbation series (solution to the Lippman-Schwinger equation). The rules we define for the diagrams allow operations like convolution and cross-correlation in the series to be compressed in diagram form. The application of the theory to a double scattering example demonstrates the power of the method.

Zuberi, M. A. H.; Alkhalifah, Tariq

2014-06-01

446

The three dimensionality of triple quantum dot stability diagrams  

NASA Astrophysics Data System (ADS)

We present the full three dimensionality of an electrostatically calculated stability diagram for triple quantum dots. The stability diagram maps out the favored charge configuration of the system as a function of potential shifts due to gate voltages. For triple dots only a three-dimensional visualization allows for the complete identification of all its components. Those are most notably the so-called quadruple points where four electronic configurations are degenerate, and quantum cellular automata processes. The exact positions of these features within the stability diagram are now revealed. Furthermore, the influence on transport is studied by comparing the model with a two-path triple quantum dot made with local anodic oxidation. The two-path setup allows us to study the influence of the dots' arrangement.

Rogge, M. C.; Haug, R. J.

2009-11-01

447

Project Management Plan for the INEL technology logic diagrams  

SciTech Connect

This Project Management Plan (PjMP) describes the elements of project planning and control that apply to activities outlined in Technical Task Plan (TTP) ID-121117, ``Technology Logic Diagrams For The INEL.`` The work on this project will be conducted by personnel in EG&G Idaho, Inc.`s Waste Technology Development Program. Technology logic diagrams represent a formal methodology to identify technology gaps or needs within Environmental Restoration/Waste Management Operations, which will focus on Office of Environmental Restoration and Waste Management (EM-50) research and development, demonstration, test, and evaluation efforts throughout the US Department of Energy complex. This PjMP describes the objectives, organization, roles and responsibilities, workscope and processes for implementing and managing the technology logic diagram for the Idaho National Engineering Laboratory project.

Rudin, M.J.

1992-10-01

448

Project Management Plan for the INEL technology logic diagrams  

SciTech Connect

This Project Management Plan (PjMP) describes the elements of project planning and control that apply to activities outlined in Technical Task Plan (TTP) ID-121117, Technology Logic Diagrams For The INEL.'' The work on this project will be conducted by personnel in EG G Idaho, Inc.'s Waste Technology Development Program. Technology logic diagrams represent a formal methodology to identify technology gaps or needs within Environmental Restoration/Waste Management Operations, which will focus on Office of Environmental Restoration and Waste Management (EM-50) research and development, demonstration, test, and evaluation efforts throughout the US Department of Energy complex. This PjMP describes the objectives, organization, roles and responsibilities, workscope and processes for implementing and managing the technology logic diagram for the Idaho National Engineering Laboratory project.

Rudin, M.J.

1992-10-01

449

Interpretation of the Hubble diagram in a nonhomogeneous universe  

NASA Astrophysics Data System (ADS)

In the standard cosmological framework, the Hubble diagram is interpreted by assuming that the light emitted by standard candles propagates in a spatially homogeneous and isotropic spacetime. However, the light from “point sources”—such as supernovae—probes the Universe on scales where the homogeneity principle is no longer valid. Inhomogeneities are expected to induce a bias and a dispersion of the Hubble diagram. This is investigated by considering a Swiss-cheese cosmological model, which (1) is an exact solution of the Einstein field equations, (2) is strongly inhomogeneous on small scales, but (3) has the same expansion history as a strictly homogeneous and isotropic universe. By simulating Hubble diagrams in such models, we quantify the influence of inhomogeneities on the measurement of the cosmological parameters. Though significant in general, the effects reduce drastically for a universe dominated by the cosmological constant.

Fleury, Pierre; Dupuy, Hélène; Uzan, Jean-Philippe

2013-06-01

450

Phase diagrams of two-lane driven diffusive systems  

NASA Astrophysics Data System (ADS)

We consider a large class of two-lane driven diffusive systems in contact with reservoirs at their boundaries and develop a stability analysis of mean-field profiles as a method to derive the phase diagrams of such systems. We illustrate the method by deriving phase diagrams for the asymmetric exclusion process coupled to various second lanes: a diffusive lane, an asymmetric exclusion process with advection in the same direction as the first lane, and an asymmetric exclusion process with advection in the opposite direction. The competing currents on the two lanes naturally lead to a very rich phenomenology and we find a variety of phase diagrams. It is shown that the stability analysis is equivalent to an 'extremal current principle' for the total current in the two lanes. We also point to classes of models where the analysis fails due to the lack of a dynamically stable current-density relation.

Evans, M. R.; Kafri, Y.; Sugden, K. E. P.; Tailleur, J.

2011-06-01

451

Generation of finite life distributional Goodman diagrams for reliability prediction  

NASA Technical Reports Server (NTRS)

The methodology of developing finite life distributional Goodman diagrams and surfaces is described for presenting allowable combinations of alternating stress and mean stress to the design engineer. The combined stress condition is that of an alternating bending stress and a constant shear stress. The finite life Goodman diagrams and surfaces are created from strength distributions developed at various ratios of alternating to mean stress at particular cycle life values. The conclusions indicate that the Von Mises-Hencky ellipse, for cycle life values above 1000 cycles, is an adequate model of the finite life Goodman diagram. In addition, suggestions are made which reduce the number of experimental data points required in a fatigue data acquisition program.

Kececioglu, D.; Guerrieri, W. N.

1971-01-01

452

Fast Formal Analysis of Requirements via "Topoi Diagrams"  

NASA Technical Reports Server (NTRS)

Early testing of requirements can decrease the cost of removing errors in software projects. However, unless done carefully, that testing process can significantly add to the cost of requirements analysis. We show here that requirements expressed as topoi diagrams can be built and tested cheaply using our SP2 algorithm, the formal temporal properties of a large class of topoi can be proven very quickly, in time nearly linear in the number of nodes and edges in the diagram. There are two limitations to our approach. Firstly, topoi diagrams cannot express certain complex concepts such as iteration and sub-routine calls. Hence, our approach is more useful for requirements engineering than for traditional model checking domains. Secondly, out approach is better for exploring the temporal occurrence of properties than the temporal ordering of properties. Within these restrictions, we can express a useful range of concepts currently seen in requirements engineering, and a wide range of interesting temporal properties.

Menzies, Tim; Powell, John; Houle, Michael E.; Kelly, John C. (Technical Monitor)

2001-01-01

453

Phase diagram of supercooled water confined to hydrophilic nanopores  

NASA Astrophysics Data System (ADS)

We present a phase diagram for water confined to cylindrical silica nanopores in terms of pressure, temperature, and pore radius. The confining cylindrical wall is hydrophilic and disordered, which has a destabilizing effect on ordered water structure. The phase diagram for this class of systems is derived from general arguments, with parameters taken from experimental observations and computer simulations and with assumptions tested by computer simulation. Phase space divides into three regions: a single liquid, a crystal-like solid, and glass. For large pores, radii exceeding 1 nm, water exhibits liquid and crystal-like behaviors, with abrupt crossovers between these regimes. For small pore radii, crystal-like behavior is unstable and water remains amorphous for all non-zero temperatures. At low enough temperatures, these states are glasses. Several experimental results for supercooled water can be understood in terms of the phase diagram we present.

Limmer, David T.; Chandler, David

2012-07-01

454

Low pressure phase diagram of CeCoGe3  

NASA Astrophysics Data System (ADS)

We have performed measurements of the Hall magnetization and electrical resistivity on a pressure-induced antiferromagnetic heavy fermion superconductor CeCoGe3 at pressures up to ~1.7 GPa, which crystallizes in the tetragonal BaNiSn3-type structure without inversion symmetry. We have clarified that five successive phase transitions appear at ambient pressure. As pressure is applied, these transitions approach one another until ~1.2 GPa, and then separate again. We have also found another phase transition emerges above ~0.5 GPa, which is consistent with a recent Co-NQR study. From these results, we propose a low pressure P-T phase diagram, which contains at least eight ordered phases below ~2 GPa. This phase diagram is consistent with a recent reported high pressure phase diagram.

Mizoo, Masakazu; Nishioka, Takashi; Kato, Harukazu; Matsumura, Masahiro

2011-01-01

455

Phase diagram of supercooled water confined to hydrophilic nanopores.  

PubMed

We present a phase diagram for water confined to cylindrical silica nanopores in terms of pressure, temperature, and pore radius. The confining cylindrical wall is hydrophilic and disordered, which has a destabilizing effect on ordered water structure. The phase diagram for this class of systems is derived from general arguments, with parameters taken from experimental observations and computer simulations and with assumptions tested by computer simulation. Phase space divides into three regions: a single liquid, a crystal-like solid, and glass. For large pores, radii exceeding 1 nm, water exhibits liquid and crystal-like behaviors, with abrupt crossovers between these regimes. For small pore radii, crystal-like behavior is unstable and water remains amorphous for all non-zero temperatures. At low enough temperatures, these states are glasses. Several experimental results for supercooled water can be understood in terms of the phase diagram we present. PMID:22852633

Limmer, David T; Chandler, David

2012-07-28

456

Anthropotechnological analysis of industrial accidents in Brazil.  

PubMed Central

The Brazilian Ministry of Labour has been attempting to modify the norms used to analyse industrial accidents in the country. For this purpose, in 1994 it tried to make compulsory use of the causal tree approach to accident analysis, an approach developed in France during the 1970s, without having previously determined whether it is suitable for use under the industrial safety conditions that prevail in most Brazilian firms. In addition, opposition from Brazilian employers has blocked the proposed changes to the norms. The present study employed anthropotechnology to analyse experimental application of the causal tree method to work-related accidents in industrial firms in the region of Botucatu, São Paulo. Three work-related accidents were examined in three industrial firms representative of local, national and multinational companies. On the basis of the accidents analysed in this study, the rationale for the use of the causal tree method in Brazil can be summarized for each type of firm as follows: the method is redundant if there is a predominance of the type of risk whose elimination or neutralization requires adoption of conventional industrial safety measures (firm representative of local enterprises); the method is worth while if the company's specific technical risks have already largely been eliminated (firm representative of national enterprises); and the method is particularly appropriate if the firm has a good safety record and the causes of accidents are primarily related to industrial organization and management (multinational enterprise).

Binder, M. C.; de Almeida, I. M.; Monteau, M.

1999-01-01

457

Truck accident involving unirradiated nuclear fuel  

SciTech Connect

In the early morning of Dec. 16, 1991, a severe accident occurred when a passenger vehicle traveling in the wrong direction collided with a tractor trailer carrying 24 nuclear fuel assemblies in 12 containers on Interstate 1-91 in Springfield, Massachusetts. This paper documents the mechanical circumstances of the accident and the physical environment to which the containers were exposed and the response of the containers and their contents. The accident involved four impacts where the truck was struck by the car, impacted on the center guardrail, impacted on the outer concrete barrier and came to rest against the center guardrail. The impacts were followed by a fire that began in the engine compartment, spread to the.tractor and cab, and eventually spread to the trailer and payload. The fire lasted for about three hours and the packages were involved in the fire for about two hours. As a result of the fire, the tractor-trailer was completely destroyed and the packages were exposed to flames with temperatures between 1300[degrees]F and 1800[degrees]F. The fuel assemblies remained intact during the accident and there was no release of any radioactive material during the accident. This was a very severe accident; however, the injuries were minor and at no time was the public health and safety at risk.

Carlson, R.W.; Fischer, L.E.

1992-07-01

458

Truck accident involving unirradiated nuclear fuel  

SciTech Connect

In the early morning of Dec. 16, 1991, a severe accident occurred when a passenger vehicle traveling in the wrong direction collided with a tractor trailer carrying 24 nuclear fuel assemblies in 12 containers on Interstate 1-91 in Springfield, Massachusetts. This paper documents the mechanical circumstances of the accident and the physical environment to which the containers were exposed and the response of the containers and their contents. The accident involved four impacts where the truck was struck by the car, impacted on the center guardrail, impacted on the outer concrete barrier and came to rest against the center guardrail. The impacts were followed by a fire that began in the engine compartment, spread to the.tractor and cab, and eventually spread to the trailer and payload. The fire lasted for about three hours and the packages were involved in the fire for about two hours. As a result of the fire, the tractor-trailer was completely destroyed and the packages were exposed to flames with temperatures between 1300{degrees}F and 1800{degrees}F. The fuel assemblies remained intact during the accident and there was no release of any radioactive material during the accident. This was a very severe accident; however, the injuries were minor and at no time was the public health and safety at risk.

Carlson, R.W.; Fischer, L.E.

1992-07-01

459

Influence Diagram Use With Respect to Technology Planning and Investment  

NASA Technical Reports Server (NTRS)

Influence diagrams are relatively simple, but powerful, tools for assessing the impact of choices or resource allocations on goals or requirements. They are very general and can be used on a wide range of problems. They can be used for any problem that has defined goals, a set of factors that influence the goals or the other factors, and a set of inputs. Influence diagrams show the relationship among a set of results and the attributes that influence them and the inputs that influence the attributes. If the results are goals or requirements of a program, then the influence diagram can be used to examine how the requirements are affected by changes to technology investment. This paper uses an example to show how to construct and interpret influence diagrams, how to assign weights to the inputs and attributes, how to assign weights to the transfer functions (influences), and how to calculate the resulting influences of the inputs on the results. A study is also presented as an example of how using influence diagrams can help in technology planning and investment. The Space Propulsion Synergy Team (SPST) used this technique to examine the impact of R&D spending on the Life Cycle Cost (LCC) of a space transportation system. The question addressed was the effect on the recurring and the non-recurring portions of LCC of the proportion of R&D resources spent to impact technology objectives versus the proportion spent to impact operational dependability objectives. The goals, attributes, and the inputs were established. All of the linkages (influences) were determined. The weighting of each of the attributes and each of the linkages was determined. Finally the inputs were varied and the impacts on the LCC determined and are presented. The paper discusses how each of these was accomplished both for credibility and as an example for future studies using influence diagrams for technology planning and investment planning.

Levack, Daniel J. H.; DeHoff, Bryan; Rhodes, Russel E.

2009-01-01

460

Pocket extraction on proteins via the Voronoi diagram of spheres.  

PubMed

Proteins consist of atoms. Given a protein, the automatic recognition of depressed regions, called pockets, on the surface of proteins is important for protein-ligand docking and facilitates fast development of new drugs. Recently, computational approaches have emerged for recognizing pockets from the geometrical point of view. Presented in this paper is a geometric method for the pocket recognition which is based on the Voronoi diagram for atoms. Given a Voronoi diagram, the proposed algorithm transforms the atomic structure to meshes which contain the information of the proximity among atoms, and then recognizes depressions on the surface of a protein using the meshes. PMID:18023220

Kim, Donguk; Cho, Cheol-Hyung; Cho, Youngsong; Ryu, Joonghyun; Bhak, Jonghwa; Kim, Deok-Soo

2008-04-01

461

Homework on Volcanic Rock Chemistry and Binary Phase Diagrams  

NSDL National Science Digital Library

This homework has 2 main parts: In the first part, students are given bulk compositions for 6 volcanic rocks and asked to classify them, think about their normative compositions, and given likely tectonic settings for three of them. In the second part, they work with a complex binary phase diagram. In this part, they must think about components vs. phases, the lever rule, behavior at a peritectic point, and fractional removal of a phase. After completing this homework, I find that students are comfortable working with any binary diagram I give them.

Selverstone, Jane

462

Magnetic phase diagrams for models of synthetic antiferromagnets  

NASA Astrophysics Data System (ADS)

Phenomenological macrospin models have been studied to elucidate the field-driven reorientation transitions in antiferromagnetically coupled magnetic thin-film elements with uniaxial anisotropy. For planar bilayer systems, there are four topologically different phase diagrams depending on the ratio of anisotropy to exchange energy. Only for weak anisotropies, the usual phase diagram of antiferromagnets with a spin flop is realized. Analytic and numeric results are presented for a model of a synthetic antiferromagnet composed of four layers, where two ferromagnetically coupled bilayers are coupled antiferromagnetically. Applied fields may stabilize collinear ferrimagnetic and canted phases in these four-layer systems for certain ranges of the ratio between ferromagnetic exchange and antiferromagnetic exchange.

Rößler, U. K.; Bogdanov, A. N.

2007-05-01

463

Triple quantum dots: Two path transport and electrostatic stability diagram  

NASA Astrophysics Data System (ADS)

We present analysis of measurements on a triple quantum dot with a two path setup. The electron transport along both paths is recorded as well as charging data measured with a quantum point contact. The results are compared with an electrostatic model. This model allows for the full visualization of the three dimensional stability diagram for triple quantum dots. It is found that this diagram contains a central diamond shaped plane at which one specific quantum cellular automata (QCA) process occurs. Moreover quadruple points are found with four degenerate charge configurations. The QCA process defines the quadruple points and limits their number to six.

Rogge, M. C.; Haug, R. J.

2010-02-01

464

Boston University Physics Easy Java Simulation: Free Body Diagrams  

NSDL National Science Digital Library

This simulation offers users the opportunity to sketch free-body diagrams relating to a one-dimensional situation. Two boxes are stacked one atop the other. The bottom box rests on the floor of an elevator, which may be at rest, moving with constant velocity, or accelerating. The task for the user is to sketch free-body diagrams for the top box, the bottom box, and the two-box system. This applet was created with EJS, Easy Java Simulations, a modeling tool that allows users without formal programming experience to generate computer models and simulations.

Duffy, Andrew

2009-10-22

465

Helioseismic Ring-diagram Diagnostics of Solar Fares.  

NASA Astrophysics Data System (ADS)

Flares are known to excite waves in the solar atmosphere. Maurya et al. (2009), using a local analysis (ring diagrams) of the 2003 Halloween flare, also showed they excite p-modes. We confirm and extend here these results by:-applying the same analysis to other locations on the Sun at the time of the Halloween flare-analyzing another event also showing a signature of p-mode excitation-looking in details at the results of the ring diagrams analysis in terms of noise fitting.The Halloween flare present an apparent localized excitation of p-modes, similar to what is observed for the other event analyzed.

Leibacher, John W.; Baudin, Frédéric

2014-06-01

466

Managing family problems in advanced disease--a flow diagram.  

PubMed

The interaction between patient, family and professional team can sometimes make difficult situations worse rather than better. This flow diagram attempts to clarify the process by which a professional assesses situations and suggests ways in which people can gain understanding about their difficulties. Once everyone has a greater understanding of what is or is not happening, the diagram points to ways in which professionals can use questions to help patient and family create a solution that is workable both for them and for the professionals. PMID:8287199

Smith, N; Regnard, C

1993-01-01

467

Theoretical phase diagrams for solid H{sub 2}  

SciTech Connect

Possible phase diagrams for solid molecular para-hydrogen in the 0-200 GPa pressure regime are constructed on the basis of ab initio calculations. Structures for the broken symmetry phase (BSP) and H-A phase have recently been proposed under the assumption that the molecules are centered on sites of a hexagonal close-packed lattice with the ideal c/a ratio, i.e., only molecular orientational and electronic changes are allowed. Symmetry considerations then dictate the simplest phase diagrams consistent with experimental observations, although the possibility of additional transitions cannot be ruled out. A simple model is introduced to describe the BSP and H-A transitions.

Surh, M.P.; Runge, K.J.

1993-07-01

468

Drudgery, accidents and injuries in Indian agriculture.  

PubMed

The Indian farming employs 225 million workforce to cover 140 million hectares of total cultivated land. In spite of rapid farm mechanization (e.g., 149 million farm machinery), the vast resource-poor family farming has primary dependence on traditional methods (e.g., 520 million hand tools and 37 million animal-drawn implements are in operation). The work drudgery, the traumatic accidents and injuries are the major concerns to examine options for ergonomics intervention and betterment of work in crop production activities. This review summarizes human energy expenditure in crop production activities, to assess the job severity, tools and machinery, and formulate the basis to reorganize work and work methods. While the farm mechanization is more in the northern India, the accidents were more in the villages in southern India. On average of the four regions, the tractor incidents (overturning, falling from the tractor, etc.) were highest (27.7%), followed by thresher (14.6%), sprayer/duster (12.2%), sugarcane crusher (8.1%) and chaff cutter (7.8%) accidents. Most of the fatal accidents resulted from the powered machinery, with the annual fatality rate estimated as 22 per 100,000 farmers. The hand tools related injuries (8% of the total accidents) were non-fatal in nature. In spite of the enactment of legislation, the shortcomings in production and monitoring of the machinery in field use may be responsible for the high rate of accidents (e.g., 42 thresher accidents/1,000 mechanical threshers/year in southern India). Due to the lack of technical capability of the local artisans, adhering to safety and design standards is impractical to the implements fabricated in the rural areas. The analysis emphasizes that the effective safety and health management may be possible through legislative enabling of the local infra-structure, such as block development authority and primary health services, to permeate occupational health and safe work practices in the farming sector. PMID:15128164

Nag, Pranab Kumar; Nag, Anjali

2004-04-01

469

Preliminary evaluation of the Accident Response Mobile Manipulation System for accident site salvage operations  

SciTech Connect

This paper describes and evaluates operational experiences with the Accident Response Mobile Manipulation System (ARMMS) during simulated accident site salvage operations which might involve nuclear weapons. The ARMMS is based upon a teleoperated mobility platform with two Schilling Titan 7F Manipulators.

Trujillo, J.M. [New Mexico Univ., Albuquerque, NM (United States); Morse, W.D.; Jones, D.P. [Sandia National Labs., Albuquerque, NM (United States)

1994-10-01

470

Validation of COSTA on Predicting Core Damage Accident Progression with the TMI2 Accident Data  

Microsoft Academic Search

COSTA (A Computerized Support System for the Emergency Technical Advisory Body in Japan) has been developed by the Japan Atomic Energy Research Institute to provide national response capability during radiological accident emergencies. COSTA can be used to identify plant status and predict accident progression based on emergency data reported by the utility of an affected plant. To assess the capability

Tsutomu ISHIGAMI

1995-01-01

471

[An analysis of industrial accidents in the working field with a particular emphasis on repeated accidents].  

PubMed

The present study is based on an analysis of routinely submitted reports of occupational accidents experienced by the workers of industrial enterprises under the jurisdiction of Kagoshima Labor Standard Office during a 5-year period 1983 to 1987. Officially notified injuries serious enough to keep employees away from their job for work at least 4 days were utilized in this study. Data was classified so as to give an observed frequency distribution for workers having any specified number of accidents. Also, the accident rate which is an indicator of the risk of accident was compared among different occupations, between age groups and between the sexes. Results obtained are as follows; 1) For the combined total of 6,324 accident cases for 8 types of occupation (Construction, Transportation, Mining & Quarrying, Forestry, Food manufacture, Lumber & Woodcraft, Manufacturing industry and Other business), the number of those who had at least one accident was 6,098, of which 5,837 were injured only once, 208 twice, 21 three times and 2 four times. When occupation type was fixed, however, the number of workers having one, two, three and four times of accidents were 5,895, 182, 19 and 2, respectively. This suggests that some workers are likely to have experienced repeated accidents in more than one type of occupation.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:2131982

Wakisaka, I; Yanagihashi, T; Tomari, T; Sato, M

1990-03-01

472

Javelin diagrams: applications in veterinary medical decision analysis  

Microsoft Academic Search

This paper introduces javelin diagrams as an innovative way for depicting the results of medical decision analyses. The methods were used to determine whether, and at which values, blood lactate in Belgian White and Blue or maximum tidal volumes in Holstein calves should be measured before deciding to treat or not a calf suffering from the bovine respiratory disease complex.

Johann C. Detilleux

2004-01-01

473

Expected Complexity of the 3-Dimensional Voronoi Diagram.  

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, work by Bentley, Weide and Yao is extended to show that the Voronoi diagram for S has an expected O(n) number of faces. A ...

J. Bernal

1990-01-01

474

Expected Complexity of the 3-Dimensional Voronoi Diagram.  

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. Work by Bentley, Weide and Yao is extended to show that the Voronoi diagram for S has an expected O(n) number of faces. A consequence of...

J. Bernal

1989-01-01

475

Bi-phase transition diagrams of metallic thin multilayers  

SciTech Connect

Phase transitions of metallic multilayers induced by differences in interface energy are considered thermodynamically, based on a thermodynamic model for interface energy and the Goldschmidt premise for lattice contraction. Bi-phase transition diagrams of Co/Cr, Zr/Nb, Ti/Nb and Ti/Al multilayers are constructed, which are in agreement with experimental results.

Li, J.C. [Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University, 142 RenMin Street, Changchun 130025 (China); Liu, W. [Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University, 142 RenMin Street, Changchun 130025 (China); Jiang, Q. [Key Laboratory of Automobile Materials, Ministry of Education, and Department of Materials Science and Engineering, Jilin University, 142 RenMin Street, Changchun 130025 (China)]. E-mail: jiangq@jlu.edu.cn

2005-02-01

476

Respiratory gas exchange using a triaxial alveolar gas diagram  

Microsoft Academic Search

A triaxial alveolar gas diagram to depict fractional concentration of oxygen, carbon dioxide and nitrogen is described, in which the R = 1 line is always implicit. Although it is not claimed that this representation leads to new insights into respiratory physiology, a method of plotting on a triaxial coordinate system has been found to be well suited to many

J F Fuster; T Pages; L Palacios

1993-01-01

477

Block diagrams of the radar interface and control unit  

NASA Technical Reports Server (NTRS)

The Interface and Control Unit is the heart of the radar module, which occupies one complex channel of the High-Speed Data Acquisition System of the Goldstone Solar System Radar. Block diagrams of the interface unit are presented as an aid to understanding its operation and interconnections to the rest of the radar module.

Collier, J. W.

1989-01-01

478

A martensite boundary on the WRC-1992 diagram  

SciTech Connect

The upper martensite boundary line from the Schaeffler diagram for stainless steel weld metals can be transposed to the WRC-1992 diagram. However, magnetic measurements and longitudinal face bend tests of weld metals do not show good correspondence to this boundary. Many deposit compositions of lower chromium and nickel equivalents than those along Schaeffler`s transposed martensite boundary show no martensite as-deposited and pass a 2T longitudinal face bend test. Based upon magnetic measurements and bend tests of about 100 weld metal compositions, obtained as single-pass submerged arc deposits on ASTM A36 mild steel, a new martensite boundary is proposed for addition to the WRC-1992 diagram. This boundary separates compositions that exhibit no magnetic response attributable to martensite and pass a 2T longitudinal face bend test from compositions that have magnetic response that indicates the presence of as-deposited martensite and fail the bend test. Because manganese is part of neither the chromium equivalent nor the nickel equivalent on the WRC-1992 diagram, the line is specific to the Mn level considered in the tests--approximately 1%--that is suitable for most stainless steel cladding and dissimilar metal joining situations. It is probably conservative for deposits of much higher Mn content.

Kotecki, D.J. [Lincoln Electric Co., Cleveland, OH (United States)

1999-05-01

479

Cognitive Activities in Complex Science Text and Diagrams  

ERIC Educational Resources Information Center

Ainsworth's (2006) DeFT framework posits that different representations may lead learners to use different strategies. We wanted to investigate whether students use different strategies, and more broadly, different cognitive activities in diagrams vs. in running text. In order to do so, we collected think-aloud protocol and other measures from 91…

Cromley, Jennifer G.; Snyder-Hogan, Lindsey E.; Luciw-Dubas, Ulana A.

2010-01-01

480

Using Tree Diagrams as an Assessment Tool in Statistics Education  

ERIC Educational Resources Information Center

This study examines the potential of the tree diagram, a type of graphic organizer, as an assessment tool to measure students' knowledge structures in statistics education. Students' knowledge structures in statistics have not been sufficiently assessed in statistics, despite their importance. This article first presents the rationale and method…

Yin, Yue

2012-01-01

481

The Phase Diagram of KNO3 to 40 Kbars.  

National Technical Information Service (NTIS)

The phase diagram of KNO3 was determined by differential thermal analysis to 40 kbars and 600C. Three new polymorphs, KNO3 V, VI, VII, were found. The melting curve passes through a broad maximum at 6.4 kbars, possibly through a second one at 11 kbars, an...

E. Rapoport G. C. Kennedy

1965-01-01

482

Feynman diagrams and the KdV hierarchy  

Microsoft Academic Search

The generating series of the intersection numbers of the stable cohomology classes on moduli spaces of curves satisfies the string equation and a KdV hierarchy. We give a proof of this classical Kontsevich-Witten result completely in terms of Feynman diagrams.

Domenico Fiorenza

2001-01-01

483

Pairs of Pulsars in the Diagram P dot Versus P.  

National Technical Information Service (NTIS)

Pairs of pulsars (PSR) selected by Vladimirskii (1984) are distributed in 3 groups of PSR found by applying discriminant analysis to the diagram P dot vs P. Evolutive implications of the isochrone t = 1 million yr are discussed. A list of pairs was select...

M. Fracassini P. Maggi L. E. Pasinetti G. Raffaelli

1986-01-01

484

Do students use and understand free-body diagrams?  

Microsoft Academic Search

Physics education literature recommends using multiple representations to help students understand concepts and solve problems. However, there is little research concerning why students use the representations and whether those who use them are more successful. This study addresses these questions using free-body diagrams (diagrammatic representations used in problems involving forces) as a type of representation. We conducted a two-year quantitative

David Rosengrant; Alan van Heuvelen; Eugenia Etkina

2009-01-01

485

The Use of Kruskal-Newton Diagrams for Differential Equations  

SciTech Connect

The method of Kruskal-Newton diagrams for the solution of differential equations with boundary layers is shown to provide rapid intuitive understanding of layer scaling and can result in the conceptual simplification of some problems. The method is illustrated using equations arising in the theory of pattern formation and in plasma physics.

T. Fishaleck and R.B. White

2008-02-19

486

Software Tool Integrating Data Flow Diagrams and Petri Nets  

NASA Technical Reports Server (NTRS)

Data Flow Diagram - Petri Net (DFPN) is a software tool for analyzing other software to be developed. The full name of this program reflects its design, which combines the benefit of data-flow diagrams (which are typically favored by software analysts) with the power and precision of Petri-net models, without requiring specialized Petri-net training. (A Petri net is a particular type of directed graph, a description of which would exceed the scope of this article.) DFPN assists a software analyst in drawing and specifying a data-flow diagram, then translates the diagram into a Petri net, then enables graphical tracing of execution paths through the Petri net for verification, by the end user, of the properties of the software to be developed. In comparison with prior means of verifying the properties of software to be developed, DFPN makes verification by the end user more nearly certain, thereby making it easier to identify and correct misconceptions earlier in the development process, when correction is less expensive. After the verification by the end user, DFPN generates a printable system specification in the form of descriptions of processes and data.

Thronesbery, Carroll; Tavana, Madjid

2010-01-01

487

Symbolic Boolean manipulation with ordered binary-decision diagrams  

Microsoft Academic Search

Ordered Binary-Decision Diagrams (OBDDs) represent Boolean functions as directed acyclic graphs. They form a canonical representation, making testing of functional properties such as satisfiability and equivalence straightforward. A number of operations on Boolean functions can be implemented as graph algorithms on OBDD data structures. Using OBDDs, a wide variety of problems can be solved through symbolic analysis. First, the possible

Randal E. Bryant

1992-01-01

488

Dataflow diagram representation of biological process: DNA, RNA, and protein  

Microsoft Academic Search

In this paper, we introduce a new method of modeling tool for a biological process -central dogma. The data-flow diagram is used as a representation of the whole data input and output, which enables us to simulate, analyze, and manipulate (in the future) at our disposal. From DNA to protein via RNA is the one of most well-known biological process,

Joe W. Yeol; W. Samarrai; I. Barjis; Y. S. Ryu

2005-01-01

489

Calculation of forming limit diagrams using Hill's 1993 yield criterion  

Microsoft Academic Search

Based on the analysis proposed by Jones and Gillis (JG), forming limit diagrams (FLDs) are calculated from idealization of sheet deformation into three stages: (I) homogeneous deformation up to maximum load, (II) deformation localization under constant load, and (III) local necking with precipitous drop in load. In the calculation, Hill's 1993 yield criterion is used. Using this yield criterion and

A. Rezaee-Bazzaz; H. Noori; R. Mahmudi

2011-01-01

490

Forming limit diagrams of tubular materials by bulge tests  

Microsoft Academic Search

This study uses bulge tests to establish the forming limit diagram (FLD) of tubular material AA6011. A self-designed bulge forming apparatus of fixed bulge length and a hydraulic test machine with axial feeding are used to carry out the bulge tests. Loading paths corresponding to the strain paths with a constant strain ratio at the pole of the bulging tube

Yeong-Maw Hwang; Yi-Kai Lin; Han-Chieh Chuang

2009-01-01

491

Equations of State and Phase Diagrams of Ammonia  

ERIC Educational Resources Information Center

We present equations of state relating the phases and a three-dimensional phase diagram for ammonia with its solid, liquid, and vapor phases, based on fitted authentic experimental data and including recent information on the high-pressure solid phases. This presentation follows similar articles on carbon dioxide and water published in this…

Glasser, Leslie

2009-01-01

492

Activity Diagram Patterns for Modeling Quality Constraints in Business Processes  

Microsoft Academic Search

Quality management is an important aspect of business processes. Organizations must implement quality requirements, e.g., according to standards like ISO 9001. Existing approaches on business process modeling provide no explicit means to enforce such requirements. UML Activity Diagrams are a well recognized way of representing those business processes. In this paper, we present an approach for enforcing quality requirements in

Alexander Foerster; Gregor Engels; Tim Schattkowsky

2005-01-01

493

Nearest Neighbourhood Operations with Generalized Voronoi Diagrams: A Review  

Microsoft Academic Search

An ordinary geographical information system has a collection of nearest neighbourhood operations, such as generating a buffer zone and searching for the nearest facility from a given location, and this collection serves as a useful tool box for spatial analysis. Computationally, these operations are undertaken through the ordinary Voronoi diagram. This paper extends this tool box by generalizing the ordinary

Atsuyuki Okabe; Barry Boots; Kokichi Sugihara

1994-01-01

494

Catastrophe Theory, Caustics and Traveltime Diagrams in Seismology,  

National Technical Information Service (NTIS)

A commonly used technique in the analysis of body wave seismograms is to display the times of arrival of geometric rays as a function of position. When caustics are present, these traveltime diagrams are multivalued functions of the position coordinate. C...

M. G. Brown F. D. Tappert

1987-01-01

495

Phase stabilities at a glance: Stability diagrams of nickel dipnictides  

SciTech Connect

In the course of the recent advances in chemical structure prediction, a straightforward type of diagram to evaluate phase stabilities is presented based on an expedient example. Crystal structures and energetic stabilities of dipnictides NiPn{sub 2} (Pn = N, P, As, Sb, Bi) are systematically investigated by first principles calculations within the framework of density functional theory using the generalized gradient approximation to treat exchange and correlation. These dipnictides show remarkable polymorphism that is not yet understood systematically and offers room for the discovery of new phases. Relationships between the concerned structures including the marcasite, the pyrite, the arsenopyrite/CoSb{sub 2}, and the NiAs{sub 2} types are highlighted by means of common structural fragments. Electronic stabilities of experimentally known and related AB{sub 2} structure types are presented graphically in so-called stability diagrams. Additionally, competing binary phases are taken into consideration in the diagrams to evaluate the stabilities of the title compounds with respect to decomposition. The main purpose of the stability diagrams is the introduction of an image that enables the estimation of phase stabilities at a single glance. Beyond that, some of the energetically favored structure types can be identified as potential new phases.

Bachhuber, F. [University of Regensburg, Institute of Inorganic Chemistry, Universitätsstr. 31, 93040 Regensburg (Germany) [University of Regensburg, Institute of Inorganic Chemistry, Universitätsstr. 31, 93040 Regensburg (Germany); School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland (New Zealand); Rothballer, J.; Weihrich, R., E-mail: richard.weihrich@chemie.uni-r.de [University of Regensburg, Institute of Inorganic Chemistry, Universitätsstr. 31, 93040 Regensburg (Germany); Söhnel, T. [School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland (New Zealand) [School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland (New Zealand); Centre for Theoretical Chemistry and Physics, The New Zealand Institute for Advanced Study, Massey University Auckland, Auckland (New Zealand)

2013-12-07

496

Riparian Sediment Delivery Ratio: Stiff Diagrams and Artifical Neural Networks  

EPA Science Inventory

Various methods are used to estimate sediment transport through riparian buffers and grass jilters with the sediment delivery ratio having been the most widely applied. The U.S. Forest Service developed a sediment delivery ratio using the stiff diagram and a logistic curve to int...

497

Phase Diagram of a - Mixture in a Square Lattice  

NASA Astrophysics Data System (ADS)

We calculate the mean-field phase diagram for an attractive interacting Fermi mixture of Lithium-6 () and Potassium-40 () atoms in a two-dimensional optical lattice at finite temperatures. The polarization versus temperature diagrams show that there are three phases: the Sarma phase (in which the condensed pairs have zero net momentum), the Fulde-Ferrell (FF) phase (in which the pairs have non-zero net momentum), and the normal phase (in which the Helmholtz free energy is minimized for gapless phase). The zero polarization line is the conventional Bardeen-Cooper-Schrieffer state. The phase diagram contains a Lifshitz point. When the interaction strength is increased, the Lifshitz point moves toward the higher temperatures and larger polarizations. Moreover, contrary to the phase diagram of population-imbalanced Fermi gas, where the phase separation appears for low polarizations, we found the existence of a polarization window for the FF phase. This means that as soon as the system is polarized it goes into the FF phase if the temperature is low enough. This polarization window is larger for a majority of atoms compared to the majority of atoms. We also find that the largest polarization that the system can support before it becomes a normal fluid is larger for majority of atoms.

Pahl, Shanna; Koinov, Zlatko

2014-07-01

498

Visualising Knowledge from Chat Debates in Argument Diagrams  

ERIC Educational Resources Information Center

This study investigates whether combining chat discussion and construction of an argument diagram stimulates students to formulate new ideas in practising argumentation. In this study, 16 secondary school students discussed vivisection and gender equality in pairs using both free and structured chat tools. In structured chat, the students selected…

Salminen, T.; Marttunen, M.; Laurinen, L.

2010-01-01

499

Analysis of Reliability Block Diagrams by Boolean Techniques  

Microsoft Academic Search

A reliability block diagram for complex systems is often analyzed by applying the series\\/parallel product laws or, where this is not possible, by using a conditional probability result (Bayes theorem). In both cases, the analysis is conducted in the probabilistic domain and, for complex systems, is lengthy. An alternative method is to consider the component reliability parameters to be Boolean

R. G. Bennetts

1982-01-01

500

DRBD: DYNAMIC RELIABILITY BLOCK DIAGRAMS FOR SYSTEM RELIABILITY MODELLING  

Microsoft Academic Search

With the rapid advances of computer-based technology in mission- critical domains such as aerospace, military, and power industries, critical systems exhibit more complex, dependent, and dynamic behaviours. Such dynamic system behaviours cannot be fully captured by existing reliability modelling tools. In this paper, we introduce a new reliability modelling tool, called dynamic reliability block diagrams (DRBD), to model dynamic relationships

H. Xu; L. Xing; R. Robidoux

2009-01-01