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1

Velocity diagrams  

NASA Technical Reports Server (NTRS)

The selection and design of velocity diagrams for axial flow turbines are considered. Application is treated in two parts which includes: (1) mean-section diagrams, and (2) radial variation of diagrams. In the first part, the velocity diagrams occurring at the mean section are assumed to represent the average conditions encountered by the turbine. The different types of diagrams, their relation to stage efficiency, and their selection when staging is required are discussed. In the second part, it is shown that in certain cases the mean-section diagrams may or may not represent the average flow conditions for the entire blade span. In the case of relatively low hub- to tip-radius ratios, substantial variations in the velocity diagrams are encountered. The radial variations in flow conditions and their effect on the velocity diagrams are considered.

Whitney, W. J.; Stewart, W. L.

1972-01-01

2

Phase Diagrams  

NSDL National Science Digital Library

This problem set challenges students to interpret a simplified temperature-composition phase diagram for the system enstatite (Mg2Si2O6) - diopside (CaMgSi2O6), which are common constituents of peridotites, gabbros, and basalts. Students are provided with the phase diagram and asked to answer 13 questions about it.

3

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

4

True Phase Diagrams  

NASA Astrophysics Data System (ADS)

With the use of today's computer softwares, phase diagrams can readily be plotted with a wide choice of variables on the axes. Hillert defined a true phase diagram as a diagram where each point uniquely defines the stable phases. He also showed that not all choices of axis variables give true phase diagrams. In this note we will demonstrate that although the rules stated by Hillert are necessary they are not sufficient to have true phase diagrams.

Ågren, John; Schmid-Fetzer, Rainer

2014-10-01

5

Simplified Voronoi Diagrams  

E-print Network

The Voronoi diagram has proved to be a useful tool in a variety of contexts in computational geometry. Our interest here is in using the diagram to simplify the planning of collision-free paths for a robot among ...

Canny, John

1987-04-01

6

Simplified Voronoi Diagrams  

Microsoft Academic Search

We are interested in Voronoi diagrams as a tool in robot path planning, where thesearch for a path in an r dimensional space may be simplified to a search on an r - 1dimensional Voronoi diagram. We define a Voronoi diagram V based on a measure ofdistance which is not a true metric. This formulation has lower algebraic complexity thanthe

John F. Canny; Bruce Randall Donald

1988-01-01

7

AFM Diagram Quiz  

NSDL National Science Digital Library

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

Perkins, Dexter

8

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.

9

Accident liability.  

PubMed Central

The idea of accident proneness, which originated in the early 1900s, has proved to be ineffectual as an operational concept. Discrete econometric methods may be useful to find out which factors are at work in the process that leads to accidents and whether there are individuals who are more liable to accidents than others. PMID:3986144

Kune, J B

1985-01-01

10

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

11

Venn Diagram Shape Sorter  

NSDL National Science Digital Library

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

2010-01-01

12

Formalizing Spider Diagrams  

Microsoft Academic Search

Geared to complement UML and to the specification of large software systems by non-mathematicians,spider di- agrams are a visual language that generalizes the popu- lar and intuitive Venn diagrams and Euler circles. The language design emphasized scalability and expressiveness while retaining intuitiveness. In this extended abstract we describe spider diagrams from a mathematical standpoint and show how their formal semantics

Joseph Gil; John Howse; Stuart Kent

1999-01-01

13

Lenses and Ray Diagrams  

NSDL National Science Digital Library

This is the first time that students will draw technical ray diagrams (in previous experiments, they simply sketched the rays). They need a little instruction in drawing ray diagrams before they can do it, so the activity is not purely inquiry. But it is

Horton, Michael

2009-05-30

14

Radiotherapy Accidents  

NASA Astrophysics Data System (ADS)

A major benefit of a Quality Assurance system in a radiotherapy centre is that it reduces the likelihood of an accident. For over 20 years I have been the interface in the UK between the Institute of Physics and Engineering in Medicine and the media — newspapers, radio and TV — and so I have learned about radiotherapy accidents from personal experience. In some cases, these accidents did not become public and so the hospital cannot be identified. Nevertheless, lessons are still being learned.

Mckenzie, Alan

15

Nuclear accidents  

NSDL National Science Digital Library

Accidents at nuclear power plants can be especially devastating to people and the environment. This article, part of a series about the future of energy, introduces students to nuclear accidents at Chernobyl, Three Mile Island, and Tokaimura. Students explore the incidents by examining possible causes, environmental impacts, and effects on life.

Project, Iowa P.

2004-01-01

16

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

17

Voronoi Diagrams and Arrangements  

Microsoft Academic Search

We propose a uniform and general framework for defining and dealing with Voronoi diagrams. In this framework a Voronoi diagram is a partition of a domainD induced by a finite number of real valued functions onD. Valuable insight can be gained when one considers how these real valued functions partitionD ×R. With this view it turns out that the standard

Herbert Edelsbrunner; Raimund Seidel

1986-01-01

18

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

19

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

20

Carbon Cycle Diagram  

NSDL National Science Digital Library

This diagram illustrates some of the most abundant stores of carbon and identifies some of the pathways in the carbon cycle along which carbon is transferred from one form to another. Long-term sinks of carbon are labelled in black; shorter-term fluxes are labelled in purple. Amounts are in billions of tons.

2011-07-12

21

Impulse-Momentum Diagrams  

ERIC Educational Resources Information Center

Multiple representations are a valuable tool to help students learn and understand physics concepts. Furthermore, representations help students learn how to think and act like real scientists. These representations include: pictures, free-body diagrams, energy bar charts, electrical circuits, and, more recently, computer simulations and…

Rosengrant, David

2011-01-01

22

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.

23

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

24

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

25

Voronoi diagrams for planar shapes  

Microsoft Academic Search

Although many algorithms compute Voronoi diagrams for polygons, few do so for shapes bounded by arbitrary closed curves. The paper presents an algorithm which does this. It also traces the diagrams directly from their differential properties

J. J. Chou

1995-01-01

26

Impulse-Momentum Diagrams  

Microsoft Academic Search

Multiple representations are a valuable tool to help students learn and understand physics concepts.1 Furthermore, representations help students learn how to think and act like real scientists.2 These representations include: pictures, free-body diagrams,3 energy bar charts,4 electrical circuits, and, more recently, computer simulations and animations.5 However, instructors have limited choices when they want to help their students understand impulse and

David Rosengrant

2011-01-01

27

Feynman diagram drawing made easy  

NASA Astrophysics Data System (ADS)

We present a drawing package optimised for Feynman diagrams. These can be constructed interactively with a mouse-driven graphical interface or from a script file, more suitable to work with a diagram generator. It provides most features encountered in Feynman diagrams and allows to modify every part of a diagram after its creation. Special attention has been paid to obtain a high quality printout as easily as possible. This package is written in Tcl/Tk and in C.

Baillargeon, Marc; Nogueira, P.

1997-02-01

28

Flow diagram analysis of electrical fatalities in construction industry.  

PubMed

The current study reanalyzed 250 electrical fatalities in the construction industry from 1996 to 2002 into seven patterns based on source of electricity (power line, energized equipment, improperly installed or damaged equipment), direct contact or indirect contact through some source of injury (boom vehicle, metal bar or pipe, and other conductive material). Each fatality was coded in terms of age, company size, experience, performing tasks, source of injury, accident cause and hazard pattern. The Chi-square Automatic Interaction Detector (CHAID) was applied to the coded data of the fatal electrocution to find a subset of predictors that might derive meaningful classifications or accidents scenarios. A series of Flow Diagrams was constructed based on CHAID result to illustrate the flow of electricity travelling from electrical source to human body. Each of the flow diagrams can be directly linked with feasible prevention strategies by cutting the flow of electricity. PMID:22317293

Chi, Chia-Fen; Lin, Yuan-Yuan; Ikhwan, Mohamad

2012-01-01

29

Impact decision support diagrams  

NASA Astrophysics Data System (ADS)

One way to frame the job of planetary defense is to “find the optimal approach for finding the optimal approach” to NEO mitigation. This requires a framework for defining in advance what should be done under various circumstances. The two-dimensional action matrix from the recent NRC report “Defending Planet Earth” can be generalized to a notional “Impact Decision Support Diagram” by extending it into a third dimension. The NRC action matrix incorporated two important axes: size and time-to-impact, but probability of impact is also critical (it is part of the definitions of both the Torino and Palermo scales). Uncertainty has been neglected, but is also crucial. It can be incorporated by subsuming it into the NEO size axis by redefining size to be three standard deviations greater than the best estimate, thereby providing a built-in conservative margin. The independent variable is time-to-impact, which is known with high precision. The other two axes are both quantitative assessments of uncertainty and are both time dependent. Thus, the diagram is entirely an expression of uncertainty. The true impact probability is either one or zero, and the true size does not change. The domain contains information about the current uncertainty, which changes with time (as opposed to reality, which does not change).

Boslough, Mark

2014-10-01

30

(?, ?) uniform-scale chromaticity diagram  

NASA Astrophysics Data System (ADS)

The non-uniformity of scale in the usual chromaticity diagrams is a very old problem in colour measurements. This program computes the transformation from the CIE 1931 ( x, y) chromaticity diagram to the recent uniform scale (?, ?) diagram and vice-versa. Moreover the program evaluates the most important colorimetric quantities for a comparison with the experimental data. Finally the chromatic gamut needed for TV applications is shown.

Oleari, Claudio; Formaleoni, Guido

1992-02-01

31

Generating function for web diagrams  

NASA Astrophysics Data System (ADS)

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

Vladimirov, A. A.

2014-09-01

32

Box diagram in Yukawa theory  

SciTech Connect

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

Bakker, Bernard L. G.; Boomsma, Jorn K. [Department of Physics and Astrophysics, Vrije Universiteit, De Boelelaan 1081, NL-1081 HV Amsterdam (Netherlands); Ji, Chueng-Ryong [Department of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202 (United States)

2007-03-15

33

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

NASA Astrophysics Data System (ADS)

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

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

2014-09-01

34

A framework for the assessment of severe accident management strategies  

SciTech Connect

Severe accident management can be defined as the use of existing and/or altemative resources, systems and actors to prevent or mitigate a core-melt accident. For each accident sequence and each combination of severe accident management strategies, there may be several options available to the operator, and each involves phenomenological and operational considerations regarding uncertainty. Operational uncertainties include operator, system and instrumentation behavior during an accident. A framework based on decision trees and influence diagrams has been developed which incorporates such criteria as feasibility, effectiveness, and adverse effects, for evaluating potential severe accident management strategies. The framework is also capable of propagating both data and model uncertainty. It is applied to several potential strategies including PWR cavity flooding, BWR drywell flooding, PWR depressurization and PWR feed and bleed.

Kastenberg, W.E. [ed.; Apostolakis, G.; Dhir, V.K. [California Univ., Los Angeles, CA (United States). Dept. of Mechanical, Aerospace and Nuclear Engineering] [and others

1993-09-01

35

Geometric Relations Among Voronoi Diagrams  

Microsoft Academic Search

Two general classes of Voronoi diagrams are introduced and, along with their modifications to higher order, are shown to be geometrically related. This geometric background, on one hand, serves to analyze the size and the combinatorial structure, and on the other hand, implies general and efficient methods of construction, for various important types of Voronoi diagrams considered in the literature.

Franz Aurenhammer; Hiroshi Imai

1987-01-01

36

Voronoi diagrams and Delaunay triangulations  

Microsoft Academic Search

IntroductionThe Voronoi diagram of a set of sites partitions space into regions, one per site; theregion for a site s consists of all points closer to s than to any other site. The dual ofthe Voronoi diagram, the Delaunay triangulation, is the unique triangulation so thatthe circumsphere of every triangle contains no sites in its interior. Voronoi diagramsand Delaunay triangulations

Steven Fortune

1995-01-01

37

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

38

Spider Diagrams: A Diagrammatic Reasoning System  

Microsoft Academic Search

Spider diagrams combine and extend Venn diagrams and Euler circles to express constraints on sets and their relationships with other sets. These diagrams can be used in conjunction with object-oriented modelling notations such as the Unified Modelling Language. This paper summarises the main syntax and semantics of spider diagrams. It also introduces inference rules for reasoning with spider diagrams and

John Howse; Fernando Molina; John Taylor; Stuart Kent; JOSEPH YOSSI GIL

2001-01-01

39

Concrete and abstract Voronoi diagrams  

SciTech Connect

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 to compute Voronoi diagrams quickly. The problem is that their structure depends on the notion of distance and the sort of site. In this book the author proposes a unifying approach by introducing abstract Voronoi diagrams. These are based on the concept of bisecting curves which are required to have some simple properties that are actually possessed by most bisectors of concrete Voronoi diagrams. Abstract Voronoi diagrams can be computed efficiently and there exists a worst-case efficient algorithm of divide-and-conquer type that applies to all abstract Voronoi diagrams satisfying a certain constraint. The author shows that this constraint is fulfilled by the concrete diagrams based no large classes of metrics in the plane.

Klein, R. (Universitat-Gesamthochschule Essen (DE))

1989-01-01

40

[Pedestrian accidents].  

PubMed

The epidemiology of non-traffic-related, pedestrian injuries in the winter sports resort of Arosa (Switzerland) between 1968 and 1995 (beginning december to end april) was studied. A total of 2813 patients (1140 male and 1673 female patients) with 3010 injuries was surveyed in a general practice. The study showed in the examined period not only an increasing number of injuries and a culmination in February, but also a higher risk for females (60 versus 40 per cent) and an increasing incidence with age. 6% of all patients had more than one injury and 5% required hospitalization. Most pedestrians had injuries of the upper and lower extremity; fracture of the distal radius was the most often diagnosed injury, followed by distortions of the foot and wrist and fractures of the ankle. For accident prevention it is important, that the authorities do not abstain from mechanical cleaning of walking surfaces as soon as they become slippery and from giving out warnings via the mass media. For outdoor walking we postulate boots for ankle protection. The results are discussed and compared with already existing publications. PMID:9887668

Bugmann, I; Röthlisberger, M; Friederich, N F; Müller, W

1998-12-01

41

Quantum Diagrams and Quantum Networks  

E-print Network

This paper is an introduction to diagrammatic methods for representing quantum processes and quantum computing. We review basic notions for quantum information and quantum computing. We discuss topological diagrams and some issues about using category theory in representing quantum computing and teleportation. We analyze very carefully the diagrammatic meaning of the usual representation of the Mach-Zehnder interferometer, and we show how it can be generalized to associate to each composition of unitary transformations a "laboratory quantum diagram" such that particles moving though the many alternate paths in this diagram will mimic the quantum process represented by the composition of unitary transformations. This is a finite dimensional way to think about the Feynman Path Integral. We call our representation result the Path Theorem. Then we go back to the basics of networks and matrices and show how elements of quantum measurement can be represented with network diagrams.

Louis H. Kauffman; Samuel J. Lomonaco Jr

2014-04-17

42

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

43

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

44

Designing an Experimental "Accident"  

ERIC Educational Resources Information Center

Describes an experimental "accident" that resulted in much student learning, seeks help in the identification of nematodes, and suggests biology teachers introduce similar accidents into their teaching to stimulate student interest. (PEB)

Picker, Lester

1974-01-01

45

Nuclear Power Plant Accidents  

MedlinePLUS

NUCLEAR POWER PLANT ACCIDENTS Nuclear power plants have safety and security procedures in place and are closely monitored ... a plume). What are the main dangers of nuclear power plant accidents? Radioactive materials in the plume from ...

46

Interpreting Accident Statistics  

E-print Network

Accident statistics have often been used to support the argument that an abnormally small proportion of drivers account for a large proportion of the accidents. This paper compares statistics developed from six-year data ...

Ferreira, Joseph Jr.

47

Phase diagrams and crystal growth  

NASA Astrophysics Data System (ADS)

Phase diagrams are briefly treated as generalized property-composition relationships, with respect to crystal technology optimization. The treatment is based on mutual interaction of three systems related to semiconductors: (a) the semiconducting material systems, (b0 the data bank, (c) the system of crystallization methods. A model is proposed enabling optimatization on the path from application requirements to the desired material. Further, several examples of the selection as to the composition of LED and laser diode material are given. Some of molten-solution-zone methods are being successfully introduced for this purpose. Common features of these methods, the application of phase diagrams, and their pecularities compared with other crystallization methods are illustrated by schematic diagrams and by examples. LPE methods, particularly the steady-state LPE methods such as Woodall's ISM and Nishizawa's TDM-CVP, and the CAM-S (Crystallization Method Providing Composition Autocontrol in Situ) have been chosen as examples. Another approach of exploiting phase diagrams for optimal material selection and for determination of growth condition before experimentation through a simple calculation is presented on InP-GaP solid solutions. Ternary phase diagrams are visualized in space through calculation and constructions based on the corresponding thermodynamic models and anaglyphs. These make it easy to observe and qualitatively analyze the crystallization of every composition. Phase diagrams can be also used as a powerful tool for the deduction of new crystallization methods. Eutectic crystallization is an example of such an approach where a modified molten-solution-zone method can give a sandwich structure with an abrupt concentration change. The concentration of a component can range from 0 to 100% in the different solid phases.

Venkrbec, Jan

1980-04-01

48

Time intervals between accidents  

Microsoft Academic Search

Much of the evidence in favor of the commonly accepted hypothesis of individual differences in accident proneness of individuals is not affected by accidents in which they are involved. The validity of this assumption is investigated in terms of a study of time intervals between consecutive accidents of a number of taxi-drivers. Some features of the relevant mathematical theory of

Alexander Mintz

1954-01-01

49

Group Accident Insurance Certificate  

E-print Network

Group Accident Insurance Certificate Regents of the University of New Mexico #12;#12;Life Insurance Company GROUP ACCIDENT CERTIFICATE THIS CERTIFICATE PROVIDES LIMITED COVERAGE. PLEASE READ YOUR. THIS CERTIFICATE IS ISSUED UNDER AN ACCIDENT ONLY POLICY. IT DOES NOT PAY BENEFITS FOR LOSS CAUSED BY SICKNESS. GA

New Mexico, University of

50

Laws of accident causation  

Microsoft Academic Search

This paper suggests that the influence of a number of important risk factors on road accidents can be described in terms of a few highly general statistical regularities that determine the shape of the relationship between the risk factors and accident occurrence. The statistical regularities are referred to as “laws of accident causation”. The following “laws” are proposed:1.The universal law

Rune Elvik

2006-01-01

51

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

52

Higher Order City Voronoi Diagrams  

E-print Network

We investigate higher-order Voronoi diagrams in the city metric. This metric is induced by quickest paths in the L1 metric in the presence of an accelerating transportation network of axis-parallel line segments. For the structural complexity of kth-order city Voronoi diagrams of n point sites, we show an upper bound of O(k(n - k) + kc) and a lower bound of {\\Omega}(n + kc), where c is the complexity of the transportation network. This is quite different from the bound O(k(n - k)) in the Euclidean metric. For the special case where k = n - 1 the complexity in the Euclidean metric is O(n), while that in the city metric is {\\Theta}(nc). Furthermore, we develop an O(k^2(n + c) log n)-time iterative algorithm to compute the kth-order city Voronoi diagram and an O(nc log^2(n + c) log n)-time divide-and-conquer algorithm to compute the farthest-site city Voronoi diagram.

Gemsa, Andreas; Liu, Chih-Hung; Wagner, Dorothea

2012-01-01

53

The Hubble diagram for supernovae  

Microsoft Academic Search

The distribution of 47 type I and 13 type II supernovae (SN) in the Hubble diagram is presented and evaluated. Values of the parameter Mpg(100) and the dispersion are determined by least-squares fits to various data subsets, and the results are compared with those of previous studies. Sources of scatter are considered, specifically inaccurate corrections for interstellar extinction in the

D. Branch; C. Bettis

1978-01-01

54

Precipitation and the Sounding Diagram  

NSDL National Science Digital Library

This undergraduate meteorology tutorial deals with the interplay between the vertical temperature structure of the atmosphere and the temperature of the ascending air in the formation of precipitation. Students learn about the dry and moist adiabatic lapse rates, reading and interpreting sounding diagrams, and determining the change in temperature as air parcels rise or sink.

Nielsen-Gammon, John

1996-01-01

55

Animated Diagram: Sedimentary Rock Identification  

NSDL National Science Digital Library

This Flash-enabled diagram provides a scheme for sedimentary rock identification accompanied by pop-up images of the rocks. Rolling the mouse over highlighted boxes links texture, grain size, composition, and map symbols to images of a variety of sedimentary rocks. The animation is downloadable.

56

Index of Animated Phase Diagrams  

NSDL National Science Digital Library

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

Windom, Kenneth E.; University, Iowa S.

57

ccsd00000445, Making diagrams speak,  

E-print Network

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

58

Hero's journey in bifurcation diagram  

NASA Astrophysics Data System (ADS)

The hero's journey is a narrative structure identified by several authors in comparative studies on folklore and mythology. This storytelling template presents the stages of inner metamorphosis undergone by the protagonist after being called to an adventure. In a simplified version, this journey is divided into three acts separated by two crucial moments. Here we propose a discrete-time dynamical system for representing the protagonist's evolution. The suffering along the journey is taken as the control parameter of this system. The bifurcation diagram exhibits stationary, periodic and chaotic behaviors. In this diagram, there are transition from fixed point to chaos and transition from limit cycle to fixed point. We found that the values of the control parameter corresponding to these two transitions are in quantitative agreement with the two critical moments of the three-act hero's journey identified in 10 movies appearing in the list of the 200 worldwide highest-grossing films.

Monteiro, L. H. A.; Mustaro, P. N.

2012-06-01

59

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

60

T-X Phase Diagrams  

NSDL National Science Digital Library

This is a 15 page tutorial and problem set designed to get students familiar with T-X diagrams, their implications, and uses. Students start by reading but, after 10-15 minutes, the room becomes noisy as they work their way through the questions at the end. Often there are "Eureka" moments as they all of a sudden grasp some fundamental principles. It is also interesting to hear them try to explain these insights to others.

Perkins, Dexter

61

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. PMID:22429606

2012-01-01

62

Designing UML diagrams for technical documentation  

Microsoft Academic Search

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

Neil MacKinnon; Steve Murphy

2003-01-01

63

Arrows in Comprehending and Producing Mechanical Diagrams  

ERIC Educational Resources Information Center

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

Heiser, Julie; Tversky, Barbara

2006-01-01

64

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

65

Liftings of diagrams of semilattices by diagrams of dimension groups  

E-print Network

We investigate categorical and amalgamation properties of the functor Idc assigning to every partially ordered abelian group G its semilattice of compact ideals Idc G. Our main result is the following. Theorem 1. Every diagram of finite Boolean semilattices indexed by a finite dismantlable partially ordered set can be lifted, with respect to the Idc functor, by a diagram of pseudo-simplicial vector spaces. Pseudo-simplicial vector spaces are a special kind of finite-dimensional partially ordered vector spaces (over the rationals) with interpolation. The methods introduced make it also possible to prove the following ring-theoretical result. Theorem 2. For any countable distributive join-semilattices S and T and any field K, any (v,0)-homomorphism $f: S\\to T$ can be lifted, with respect to the Idc functor on rings, by a homomorphism $f: A\\to B$ of K-algebras, for countably dimensional locally matricial algebras A and B over K. We also state a lattice-theoretical analogue of Theorem 2 (with respect to the Conc functor, and we provide counterexamples to various related statements. In particular, we prove that the result of Theorem 1 cannot be achieved with simplicial vector spaces alone.

Jiri Tuma; Friedrich Wehrung

2005-01-22

66

Liftings of diagrams of semilattices by diagrams of dimension groups.  

E-print Network

We investigate categorical and amalgamation properties of the functor Idc assigning to every partially ordered abelian group G its semilattice of compact ideals Idc G. Our main result is the following. Theorem 1. Every diagram of finite Boolean semilattices indexed by a finite dismantlable partially ordered set can be lifted, with respect to the Idc functor, by a diagram of pseudo-simplicial vector spaces. Pseudo-simplicial vector spaces are a special kind of finite-dimensional partially ordered vector spaces (over the rationals) with interpolation. The methods introduced make it also possible to prove the following ring-theoretical result. Theorem 2. For any countable distributive join-semilattices S and T and any field K, any (v,0)-homomorphism $f: S\\to T$ can be lifted, with respect to the Idc functor on rings, by a homomorphism $f: A\\to B$ of K-algebras, for countably dimensional locally matricial algebras A and B over K. We also state a lattice-theoretical analogue of Theorem 2 (with respect to the Conc functor, and we provide counterexamples to various related statements. In particular, we prove that the result of Theorem 1 cannot be achieved with simplicial vector spaces alone.

Jiri Tuma (MFF-UK); Friedrich Wehrung (LMNO).; no. 3 (2003) 1--28

67

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

68

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

69

HANARO thermal hydraulic accident analysis.  

National Technical Information Service (NTIS)

For the safety assessment of HANARO, accident analyses for the anticipated operational transients, accident scenarios and limiting accident scenarios were conducted. To do this, the commercial nuclear reactor system code. RELAP5/MOD2 was modified to RELAP...

B. Y. Lee, C. Park, H. I. Kim, S. Y. Lee

1996-01-01

70

Phase diagrams of polyelectrolyte solutions  

NASA Astrophysics Data System (ADS)

We study the phase diagram of polyelectrolyte solutions in salt and salt-free environments. We examine the phase behavior of polyelectrolyte solutions, in the semidilute regime, using different physical models, namely the Random Phase Approximation (RPA) and the cross-linked model. In the RPA, we calculate the electrostatic free energy by summing all the fluctuations of the chains and all present ionic species. Within this approximation, the phase diagrams of salt-free polyelectrolyte solutions show phase separation even without including short-range attractions or ion condensation. We find that the phase behavior of large chains resembles the phase diagram of polymer network solutions. That is, the equilibrium is established between a network phase and a chain-free phase. Upon the addition of salt, the dissociated ions increase the entropy of the system and overcome the energy from the electrostatic fluctuations. When the short-range attraction between monomers is included in the model, the free energy predicts phase segregation for all salt valences at high salt concentrations (1 mol/l and higher). The phenomenon is called salting-out and occurs simply because the addition of salt reduces the quality of the solvent and induces precipitation. However, phase segregation in the presence of multivalent ions in polyelectrolyte solutions occurs at low salt concentrations (less than 1 mol/l). We propose that this phase separation is due to polyions cross-linked by multivalent ions. We constructed a phenomenological two-state model to examine this phenomenon. The two phases coexisting in the solution are a network-like phase and a polymer-free phase. The polymer-free phase is modeled using Debye-Huckel theory. In the cross-linked phase, each condensed multivalent ion attracts an equal number of monomers creating a neutral cluster. The energy of the cluster is evaluated by a simple Coulombic energy. The bare monomer charges between the linkages are treated as line of charges. The cross-linked model solves self-consistently for the fraction of multivalent ions and counterions condensed along the polyions. The calculated phase diagram predicts the precipitation found experimentally; however, it fails to predict the redissolution transition at higher salt concentrations.

Mahdi, Khaled A.

71

Managing nuclear accidents  

SciTech Connect

An accident at a nuclear power plant can pose a serious threat to surrounding populations. If people and their government are poorly prepared, as was the case at Windscale, England in 1957, Three Mile Island (TMI) in the United States in 1979, and Chernobyl in the Soviet Union in 1986, substantial exposure to radiation could occur. Much has been done since the 1979 TMI accident to prepare for a future accident in the United States. The federal government now requires approved emergency plans for all nuclear plants and has established minimum specifications for such plans. This paper reports that major questions remain regarding the effectiveness of these plans in an actual nuclear accident, although they have performed well in non-nuclear incidents. Because serious nuclear accidents occur only very infrequently, the plans have not been tested in real circumstances.

Golding, D.; Kasperson, J.X.; Kasperson, R.E.; Goble, R.; Seley, J.E.; Thompson, G.; Wolf, C.P.

1992-01-01

72

TIPS ON ACCIDENT/INCIDENT REPORTING Accident Reporting Why?  

E-print Network

TIPS ON ACCIDENT/INCIDENT REPORTING Accident Reporting ­ Why? Obligation to report Health Care of the accident ­ if not, the organization (i.e. the department) can be fined Obligation under Section 51, 52 happened? When did it happen? (Date, Time and Place) When was the accident/incident reported? Any

Lennard, William N.

73

Process Flow Diagrams for Training and Operations  

NASA Astrophysics Data System (ADS)

This paper focuses on the use of process flow diagrams for training first responders who execute search and seizure warrants at electronic crime scenes. A generic process flow framework is presented, and the design goals and layout characteristics of process flow diagrams are discussed. An evaluation of the process flow diagrams used in training courses indicates that they are beneficial to first responders performing searches and seizures, and they speed up investigations, including those conducted by experienced personnel.

Venter, Jacobus

74

Hubble's diagram and cosmic expansion  

PubMed Central

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

Kirshner, Robert P.

2004-01-01

75

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

76

PHASE DIAGRAMS and MACROMOLECULAR STABILITY  

E-print Network

. Shifts in second derivative UV peak position as a function of pH and temperature. 17 Figure 3. Phase diagram created using high- resolution second derivative UV spectroscopy data. 4 5 6 7 8 pH 10 20 30 40 50 T Ricin- - 2nd Derivative UV Figure 4....25 ?g/mL, circles) and aggregate (19.17 ?g/mL, triangles) species in 25 mM Tris, 300 mM NaCl, 4 mM CaCl2, pH 7 Grillo et al. Biochemistry, 40 (2), 586 -595, 2001 53 (A) Effect of temperature on rhFVIII fluorescence emission intensity at 330 nm. (B...

Middaugh, C. Russell

2006-10-26

77

Some remarks about underused Loedel diagrams  

NASA Astrophysics Data System (ADS)

We emphasize that it can be didactically very useful for students to realize how a space-time diagram of an observer, moving with a constant velocity with respect to another observer, can be obtained easily by means of a standard matrix of rotation, without recourse to imaginary axes and angles. These diagrams were introduced for the first time by Loedel and their main advantage over Minkowski diagrams is that a scale factor is not necessary to convert the units of an observer to those of another observer. We show this well-known property of Loedel diagrams using a new geometric approach.

Benedetto, E.; Capriolo, M.; Feoli, A.; Tucci, D.

2013-01-01

78

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

79

Accident management information needs  

SciTech Connect

In support of the US Nuclear Regulatory Commission (NRC) Accident Management Research Program, a methodology has been developed for identifying the plant information needs necessary for personnel involved in the management of an accident to diagnose that an accident is in progress, select and implement strategies to prevent or mitigate the accident, and monitor the effectiveness of these strategies. This report describes the methodology and presents an application of this methodology to a Pressurized Water Reactor (PWR) with a large dry containment. A risk-important severe accident sequence for a PWR is used to examine the capability of the existing measurements to supply the necessary information. The method includes an assessment of the effects of the sequence on the measurement availability including the effects of environmental conditions. The information needs and capabilities identified using this approach are also intended to form the basis for more comprehensive information needs assessment performed during the analyses and development of specific strategies for use in accident management prevention and mitigation. 3 refs., 16 figs., 7 tabs.

Hanson, D.J.; Ward, L.W.; Nelson, W.R.; Meyer, O.R. (EG and G Idaho, Inc., Idaho Falls, ID (USA))

1990-04-01

80

DECISION DIAGRAMS AND PASS TRANSISTOR LOGIC SYNTHESIS  

E-print Network

DECISION DIAGRAMS AND PASS TRANSISTOR LOGIC SYNTHESIS V. Bertacco S. Minato P. Verplaetse L. Benini by ARPA, under grant No. DABT63-95-C-0049. #12;Decision Diagrams and Pass Transistor Logic Synthesis V transistors and domino logic. The synthesis of these cells is based on BDD and ZBDD representations

De Micheli, Giovanni

81

THE QCD PHASE DIAGRAM AT FINITE DENSITY.  

SciTech Connect

We study the density of states method to explore the phase diagram of the chiral transition on the temperature and quark chemical potential plane. Four quark flavours are used in the analysis. Though the method is quite expensive small lattices show an indication for a triple-point connecting three different phases on the phase diagram.

SCHMIDT, C.; FODOR, Z.; KATZ, S.

2005-07-25

82

Voronoi diagrams based on convex distance functions  

Microsoft Academic Search

We present an “expanding waves” view of Voronoi diagrams that allows such diagrams to be defined for very general metrics and for distance measures that do not qualify as metrics. If a pebble is dropped into a still pond, circular waves move out from the point of impact. If n pebbles are dropped simultaneously, the places where wave fronts meet

L. Paul Chew

1985-01-01

83

Locational optimization problems solved through Voronoi diagrams  

Microsoft Academic Search

This paper reviews a class of continuous locational optimization problems (where an optimal location or an optimal configuration of facilities is found in a continuum on a plane or a network) that can be solved through the Voronoi diagram. Eight types of continuous locational optimization problems are formulated, and these problems are solved through the ordinary Voronoi diagram, the farthest-point

Atsuyuki Okabe; Atsuo Suzuki

1997-01-01

84

A sweepline algorithm for Voronoi diagrams  

Microsoft Academic Search

We present a transformation that can be used to compute Voronoi diagrams with a sweepline technique. The transformation is used to obtain simple algorithms for computing the Voronoi diagram of point sites, of line segment sites, and of weighted point sites. All algorithms have &Ogr;(n log n) worst case running time and use &Ogr;(n) space.

Steven Fortune

1986-01-01

85

Feynman Diagrams and the Quantum Stochastic Calculus  

E-print Network

We present quantum stochastic calculus in terms of diagrams taking weights in the algebra of observables of some quantum system. In particular, we note the absence of non-time-consecutive Goldstien diagrams. We review recent results in Markovian limits in these terms.

John Gough

2004-11-09

86

Visualizing hyperbolic Voronoi diagrams Frank Nielsen  

E-print Network

Visualizing hyperbolic Voronoi diagrams Frank Nielsen Sony Computer Science Laboratories, Japan simultaneously the diagram in the five standard models of hyperbolic geometry: Namely, the Poincar�e disk for personal or classroom use is granted without fee provided that copies are not made or distributed

Nielsen, Frank

87

Operations space diagram for ECRH and ECCD  

NASA Astrophysics Data System (ADS)

A Clemmov-Mullaly-Allis (CMA) type diagram, the ECW-CMA diagram, for representing the operational possibilities of electron cyclotron heating and current drive (ECRH/ECCD) systems for fusion plasmas is presented. In this diagram, with normalized density and normalized magnetic field coordinates, the parameter range in which it is possible to achieve a given task (e.g. O-mode current drive for stabilizing a neoclassical tearing mode) appears as a region. With also the Greenwald density limit shown, this diagram condenses the information on operational possibilities, facilitating the overview required at the design phase. At the operations phase it may also prove useful in setting up experimental scenarios by showing operational possibilities, avoiding the need for survey type ray-tracing at the initial planning stages. The diagram may also serve the purpose of communicating operational possibilities to non-experts. JET and ITER like plasmas are used, but the method is generic.

Bindslev, Henrik

2004-07-01

88

Reading fitness landscape diagrams through HSAB concepts  

NASA Astrophysics Data System (ADS)

Fitness landscapes are conceived as range of mountains, with local peaks and valleys. In terms of potential, such topographic variations indicate places of local instability or stability. The chemical potential, or electronegativity, its value changed of sign, carries similar information. In addition to chemical descriptors defined through hard-soft acid-base (HSAB) concepts and computed through density functional theory (DFT), the principles that rule chemical reactions allow the design of such landscape diagrams. The simplest diagram uses electrophilicity and hardness as coordinates. It allows examining the influence of maximum hardness or minimum electrophilicity principles. A third dimension is introduced within such a diagram by mapping the topography of electronegativity, polarizability or charge exchange. Introducing charge exchange during chemical reactions, or mapping a third parameter (f.i. polarizability) reinforces the information carried by a simple binary diagram. Examples of such diagrams are provided, using data from Earth Sciences, simple oxides or ligands.

Vigneresse, Jean-Louis

2014-10-01

89

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

90

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

91

[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

92

Accidents in Childhood  

PubMed Central

The causes of injury to 17,141 children brought to the emergency department of a large pediatric hospital in one year were studied. The leading causes of injury were: falls, 5682; cuts or piercings, 1902; poisonings, 1597; and transportation accidents, 1368. Included in these are 587 falls on or down stairs, 401 cuts due to glass, 630 poisonings from household or workshop substances, 510 poisonings from salicylate tablets, and 449 accidents involving bicycles or tricycles. Other findings included 333 injuries to fingers or hands in doors, usually car doors; 122 instances of pulled arms; 384 ingestions and 53 inhalations of foreign bodies; 60 alleged sexual assaults, 58 chemical burns, 127 wringer injuries, and four attempted suicides. A rewarding opportunity in accident prevention exists for hospitals that undertake to compile and distribute pertinent source data. PMID:14201260

Keddy, J. Arthur

1964-01-01

93

Injuries are not accidents  

PubMed Central

Injuries are the result of an acute exposure to exhort of energy or a consequence of a deficiency in a vital element that exceeds physiological thresholds resulting threatens life. They are classified as intentional or unintentional. Injuries are considered a global health issue because they cause more than 5 million deaths per year worldwide and they are an important contributor to the burden of disease, especially affecting people of low socioeconomic status in low- and middle-income countries. A common misconception exists where injuries are thought to be the same as accidents; however, accidents are largely used as chance events, without taken in consideration that all these are preventable. This review discusses injuries and accidents in the context of road traffic and emphasizes injuries as preventable events. An understanding of the essence of injuries enables the standardization of terminology in public use and facilitates the development of a culture of prevention among all of us. PMID:25386040

Gutierrez, Maria Isabel

2014-01-01

94

The Amplituhedron from Momentum Twistor Diagrams  

E-print Network

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

Yuntao Bai; Song He

2014-08-11

95

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

96

ProofFlow: Flow Diagrams for Proofs  

E-print Network

We present a light formalism for proofs that encodes their inferential structure, along with a system that transforms these representations into flow-chart diagrams. Such diagrams should improve the comprehensibility of proofs. We discuss language syntax, diagram semantics, and our goal of building a repository of diagrammatic representations of proofs from canonical mathematical literature. The repository will be available online in the form of a wiki at proofflow.org, where the flow chart drawing software will be deployable through the wiki editor. We also consider the possibility of a semantic tagging of the assertions in a proof, to permit data mining.

Kieffer, Steven A

2012-01-01

97

Stress, violations and accidents  

Microsoft Academic Search

Sources of stress among Western Australian car and truck drivers were investigated using an extended version of the Driver Behaviour Inventory (DBI) developed by Gulian et a\\/(1989). The associations between reported stress and drivers' accident or violation records were also examined. The DBI was mailed to two groups each of 500 truck drivers with 'high' or 'low' traffic violation involvements

L. R. Hartley; J. El Hassani

1994-01-01

98

The epistemics of accidents  

Microsoft Academic Search

Human intervention has played a critical role in the causes of many major accidents. At Three Mile Island, the operators isolated a reactor from its heat sink. The pilots of the Boeing 737 at Kegworth managed to shut down their one functioning engine. Staff continued to allow trains to deposit passengers in Kings’ Cross after the fire had started. In

C. W. Johnson

1997-01-01

99

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

100

Occupational accidents aboard merchant ships  

PubMed Central

Objectives: To investigate the frequency, circumstances, and causes of occupational accidents aboard merchant ships in international trade, and to identify risk factors for the occurrence of occupational accidents as well as dangerous working situations where possible preventive measures may be initiated. Methods: The study is a historical follow up on occupational accidents among crew aboard Danish merchant ships in the period 1993–7. Data were extracted from the Danish Maritime Authority and insurance data. Exact data on time at risk were available. Results: A total of 1993 accidents were identified during a total of 31 140 years at sea. Among these, 209 accidents resulted in permanent disability of 5% or more, and 27 were fatal. The mean risk of having an occupational accident was 6.4/100 years at sea and the risk of an accident causing a permanent disability of 5% or more was 0.67/100 years aboard. Relative risks for notified accidents and accidents causing permanent disability of 5% or more were calculated in a multivariate analysis including ship type, occupation, age, time on board, change of ship since last employment period, and nationality. Foreigners had a considerably lower recorded rate of accidents than Danish citizens. Age was a major risk factor for accidents causing permanent disability. Change of ship and the first period aboard a particular ship were identified as risk factors. Walking from one place to another aboard the ship caused serious accidents. The most serious accidents happened on deck. Conclusions: It was possible to clearly identify work situations and specific risk factors for accidents aboard merchant ships. Most accidents happened while performing daily routine duties. Preventive measures should focus on workplace instructions for all important functions aboard and also on the prevention of accidents caused by walking around aboard the ship. PMID:11850550

Hansen, H; Nielsen, D; Frydenberg, M

2002-01-01

101

49 CFR 195.50 - Reporting accidents.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Reporting accidents. 195.50 Section 195.50 ...HAZARDOUS LIQUIDS BY PIPELINE Annual, Accident, and Safety-Related Condition Reporting § 195.50 Reporting accidents. An accident report is...

2011-10-01

102

49 CFR 195.50 - Reporting accidents.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Reporting accidents. 195.50 Section 195.50 ...HAZARDOUS LIQUIDS BY PIPELINE Annual, Accident, and Safety-Related Condition Reporting § 195.50 Reporting accidents. An accident report is...

2012-10-01

103

49 CFR 195.50 - Reporting accidents.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Reporting accidents. 195.50 Section 195.50 ...HAZARDOUS LIQUIDS BY PIPELINE Annual, Accident, and Safety-Related Condition Reporting § 195.50 Reporting accidents. An accident report is...

2010-10-01

104

Architecture flow diagrams under teamwork reg sign  

SciTech Connect

The Teamwork CASE tool allows Data Flow Diagrams (DFDs) to be maintained for structured analysis. Fermilab has extended teamwork under UNIX{trademark} to permit Hatley and Pirbhai Architecture Flow Diagrams (AFDs) to be associated with DFDs and subsequently maintained. This extension, called TWKAFD, allows a user to open an AFD, graphically edit it, and replace it into a TWKAFD maintained library. Other aspects of Hatley and Pirbhai's methodology are supported. This paper presents a quick tutorial on Architecture Diagrams. It then describes the user's view of TWKAFD, the experience incorporating it into teamwork, and the successes with using the Architecture Diagram methodology along with the shortcomings of using the teamwork/TWKAFD tool. 8 refs.

Nicinski, T.

1992-02-01

105

Free energy diagrams for protein function.  

PubMed

Simplified representations can be powerful. Two common examples are sequence logos and ribbon diagrams. Both have been extraordinarily successful in capturing complex static features of sequences and structures. Capturing function is challenging, since activation involves triggered dynamic shifts between ON and OFF states. Here, we show that simple funnel drawings can capture and usefully portray proteins by their cellular triggering mechanism. The funnel shape around the proteins' native states can describe mechanisms of upstream signal integration and downstream response. "Function diagrams" are important: they can combine diverse biochemical data to visually distinguish among activation (or recruitment) mechanisms and tag proteins in cellular networks, clarifying their mechanism at a glance. We create templates for function classification and suggest that they can extend signaling pathway maps. Of note, the diagrams describe free energy landscapes; thus, they can be quantified. We name our dynamic free-energy diagrams dFEDs. PMID:24508196

Nussinov, Ruth; Tsai, Chung-Jung

2014-03-20

106

Recognition of hand drawn chemical diagrams  

E-print Network

Chemists often use hand-drawn structural diagrams to capture and communicate ideas about organic compounds. However, the software available today for specifying these structures to a computer relies on a traditional mouse ...

Ouyang, Tom Yu

2007-01-01

107

Interfaces for creating quantitative conceptual diagrams  

E-print Network

Modern chart-making, illustration, and mathematical tools poorly support the use of conceptual components in quantitative graphs such as Economics diagrams. The substantial time those tools require to achieve the desired ...

Stewart, Robin S. (Robin Scott)

2008-01-01

108

Attribute Reduction Based on Property Pictorial Diagram  

PubMed Central

This paper mainly studies attribute reduction which keeps the lattice structure in formal contexts based on the property pictorial diagram. Firstly, the property pictorial diagram of a formal context is defined. Based on such diagram, an attribute reduction approach of concept lattice is achieved. Then, through the relation between an original formal context and its complementary context, an attribute reduct of complementary context concept lattice is obtained, which is also based on the property pictorial diagram of the original formal context. Finally, attribute reducts in property oriented concept lattice and object oriented concept lattice can be acquired by the relations of attribute reduction between these two lattices and concept lattice of complementary context. In addition, a detailed illustrative example is presented.

Wan, Qing; Wei, Ling

2014-01-01

109

TREE FAILURES AND ACCIDENTS IN  

E-print Network

TREE FAILURES AND ACCIDENTS IN RECREATION AREAS : A Guide to Data Management for Hazard Control.DEPARTMENT O F AGRICULTURE GENERAL TECHNICAL REPORT PSW- 24 #12;TREE FAILURES AND ACCIDENTS IN RECREATION and accidents in recreation areas: A guide to data management for hazard control. Gen. Tech. Rep. PSW-24, 30 p

Standiford, Richard B.

110

UWO Vehicle ACCIDENT REPORTING FORM  

E-print Network

UWO Vehicle ­ ACCIDENT REPORTING FORM To be completed at the scene. (Important: Do not admit a detailed description of the accident and record all relevant information on this form. File this report, 1001 Brydges Street London, if necessary. Date of Accident:_______________________________ Time

Sinnamon, Gordon J.

111

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

112

On the Construction of Abstract Voronoi Diagrams  

Microsoft Academic Search

We show that the abstract Voronoi diagram ofn sites in the plane can be constructed in timeO(n logn) by a randomized algorithm. This yields an alternative, but simpler,O(n logn) algorithm in many previously considered cases and the firstO(n logn) algorithm in some cases, e.g., disjoint convex sites with the Euclidean distance function. Abstract Voronoi diagrams are\\u000a given by a family

Kurt Mehlhorn; Stefan Meiser; Colm Ó'dúnlaing

1991-01-01

113

A Sweepline Algorithm for Voronoi Diagrams  

Microsoft Academic Search

We introduce a geometric transformation that allows Voronoi diagrams to be computed using a sweepline technique. The transformation\\u000a is used to obtain simple algorithms for computing the Voronoi diagram of point sites, of line segment sites, and of weighted\\u000a point sites. All algorithms haveO(n logn) worst-case running time and useO(n) space.

Steven Fortune

1987-01-01

114

Fluctuations and the QCD phase diagram  

SciTech Connect

In this contribution the role of quantum fluctuations for the QCD phase diagram is discussed. This concerns in particular the importance of the matter back-reaction to the gluonic sector. The impact of these fluctuations on the location of the confinement/deconfinement and the chiral transition lines as well as their interrelation are investigated. Consequences of our findings for the size of a possible quarkyonic phase and location of a critical endpoint in the phase diagram are drawn.

Schaefer, B.-J., E-mail: bernd-jochen.schaefer@uni-graz.at [Karl-Franzens-Universitaet, Institut fuer Physik (Austria)

2012-06-15

115

Preliminary Study of Impulse-Momentum Diagrams  

NSDL National Science Digital Library

In this paper we present a new representation to help students learn about momentum, impulse and conservation of momentum which we call an Impulse-Momentum Diagram. We include a description of this diagram as well as examples of how instructors can use them in the classroom. Next we present preliminary quantitative and qualitative data of a study we conducted where students used these representations. Our final analysis shows how students benefited from these representations.

Rosengrant, David; Mzoughi, Taha

2009-01-24

116

An analysis of Newton's projectile diagram  

NASA Astrophysics Data System (ADS)

Newton's famous mountain projectile diagram, reproduced in countless science books, is analysed in detail - mathematically, graphically, and historically - perhaps for the first time. A study of the relationship between this diagram from Newton's On the System of the World and the written texts on projectile motion in this book and in the Principia reveals an ambiguity in Newton's presentation. We propose an explanation of the ambiguity based on an exploration of its roots in Newton's thought.

Topper, D.; Vincent, D. E.

1999-01-01

117

Use of Frequency-Conversion Diagrams  

Microsoft Academic Search

The mathematical difficulties involved in analytical treatment of single-mesh mixer circuits with diodes and crystals lead us to consider other methods for the determination of important mixer characteristics. This paper briefly reviews the rectification-diagram method as applied to large-signal detectors, and presents for consideration the Chaffee conversion-diagram method, which treats mixer circuits in the same way as large-signal detector circuits.

H. Stockman

1944-01-01

118

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

119

Elementary diagrams in nuclear and neutron matter  

SciTech Connect

Variational calculations of nuclear and neutron matter are currently performed using a diagrammatic cluster expansion with the aid of nonlinear integral equations for evaluating expectation values. These are the Fermi hypernetted chain (FHNC) and single-operator chain (SOC) equations, which are a way of doing partial diagram summations to infinite order. A more complete summation can be made by adding elementary diagrams to the procedure. The simplest elementary diagrams appear at the four-body cluster level; there is one such E{sub 4} diagram in Bose systems, but 35 diagrams in Fermi systems, which gives a level of approximation called FHNC/4. We developed a novel technique for evaluating these diagrams, by computing and storing 6 three-point functions, S{sub xyz}(r{sub 12}, r{sub 13}, r{sub 23}), where xyz (= ccd, cce, ddd, dde, dee, or eee) denotes the exchange character at the vertices 1, 2, and 3. All 35 Fermi E{sub 4} diagrams can be constructed from these 6 functions and other two-point functions that are already calculated. The elementary diagrams are known to be important in some systems like liquid {sup 3}He. We expect them to be small in nuclear matter at normal density, but they might become significant at higher densities appropriate for neutron star calculations. This year we programmed the FHNC/4 contributions to the energy and tested them in a number of simple model cases, including liquid {sup 3}He and Bethe`s homework problem. We get reasonable, but not exact agreement with earlier published work. In nuclear and neutron matter with the Argonne v{sub 14} interaction these contributions are indeed small corrections at normal density and grow to only 5-10 MeV/nucleon at 5 times normal density.

Wiringa, R.B.

1995-08-01

120

Bifurcation diagrams for two substrate oscillatory systems  

NASA Astrophysics Data System (ADS)

The bifurcation diagrams for the Mn 2+-malonic acid-H 2SO 4-KBrO 3 an Mn 2--oxaloacetic acid-H 2SO 4-KBrO 3 systems have been studied in a stirred tank reactor. Complex oscillations associated with a period-doubling bifurcation were found. Bifurcation diagrams for the two substrate malonic-citric and malonic-oxaloacetic acid systems were also determined.

Mase?ko, Jerzy

1983-08-01

121

Phase diagram of the excitonic insulator  

Microsoft Academic Search

Motivated by recent experiments, which give strong evidence for an excitonic insulating phase in TmSe0.45Te0.55, we developed a scheme to quantitatively construct, for generic two-band models, the phase diagram of an excitonic insulator. As a first application of our approach, we calculated the phase diagram for an effective mass two-band model with long-range Coulomb interaction. The shielded potential approximation is

B. Hülsen; F. X. Bronold; H. Fehske; K. Yonemitsu

2006-01-01

122

Diagrams in Architecture: An Examination of Diagram Based Design Methods in Contemporary Urban Architecture Projects.  

E-print Network

??This research explores the relationship between the use of diagrams in architectural production and an architectural outcome which redefines conventional relationships between urban built form… (more)

Shields, Fraser

2012-01-01

123

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

124

Aircraft accidents : method of analysis  

NASA Technical Reports Server (NTRS)

The revised report includes the chart for the analysis of aircraft accidents, combining consideration of the immediate causes, underlying causes, and results of accidents, as prepared by the special committee, with a number of the definitions clarified. A brief statement of the organization and work of the special committee and of the Committee on Aircraft Accidents; and statistical tables giving a comparison of the types of accidents and causes of accidents in the military services on the one hand and in civil aviation on the other, together with explanations of some of the important differences noted in these tables.

1931-01-01

125

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

126

On phase diagrams of magnetic reconnection  

NASA Astrophysics Data System (ADS)

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.; Drake, J. F.

2013-06-01

127

ASSESSING DIAGRAM QUALITY: MAKING A DIFFERENCE TO REPRESENTATION  

Microsoft Academic Search

The effectiveness of a diagram in problem solving is dependent on its utility as a cognitive tool. In order to develop students' ability to use diagrams as cognitive tools, teachers need to assess the quality of students' diagrams and provide them with the necessary support. However assessing the quality of diagrams is problematic. This paper discusses how theoretical prototypes and

Carmel M Diezmann

128

The Hardness-Duration Diagram of Gamma-Ray Bursts  

Microsoft Academic Search

The hardness-duration diagram for gamma-ray bursts still contains undiscovered important information about the intrinsic properties of these phenomena. We analyze these diagrams for the PHEBUS and BATSE experiments. First, we show that the BATSE diagram is very similar to that for PHEBUS when we restrict the BATSE data set to events observable by PHEBUS. In this case, both diagrams present

J. P. Dezalay; J. P. Lestrade; C. Barat; R. Talon; R. Sunyaev; O. Terekhov; A. Kuznetsov

1996-01-01

129

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

130

The Use of Computational Diagrams and Nomograms in Higher Education.  

ERIC Educational Resources Information Center

The use of computational diagrams and nomographs for the calculations that frequently occur in college administration is examined. Steps in constructing a nomograph and a four-dimensional computational diagram are detailed, and uses of three- and four-dimensional diagrams are covered. Diagrams and nomographs are useful in the following cases: (1)…

Brandenburg, Richard K.; Simpson, William A.

1984-01-01

131

Use of Affinity Diagrams as Instructional Tools in Inclusive Classrooms.  

ERIC Educational Resources Information Center

This article describes how the affinity diagram, a tool for gathering information and organizing it into natural groupings, can be used in inclusive classrooms. It discusses how students can be taught to use an affinity diagram, how affinity diagrams can be used to reflect many voices, and how affinity diagrams can be used to plan class projects.…

Haselden, Polly G.

2003-01-01

132

Picturing Probability: the poverty of Venn diagrams, the richness of  

E-print Network

's name deserves to be attached to these diagrams. Venn diagrams visually ground symbolic logic book Symbolic Logic Venn makes much use of these diagrams, yet in his book on probability, The Logic 1 It is true that Venn's probability book predates his symbolic logic book, however the diagrams

Oldford, R.W.

133

[Chernobyl nuclear power plant accident and Tokaimura criticality accident].  

PubMed

It is clear from inspection of historical incidents that the scale of disasters in a nuclear power plant accident is quite low level overwhelmingly compared with a nuclear explosion in nuclear war. Two cities of Hiroshima and Nagasaki were destroyed by nuclear blast with about 20 kt TNT equivalent and then approximately 100,000 people have died respectively. On the other hand, the number of acute death is 30 in the Chernobyl nuclear reactor accident. In this chapter, we review health hazards and doses in two historical nuclear incidents of Chernobyl and Tokaimura criticality accident and then understand the feature of the radiation accident in peaceful utilization of nuclear power. PMID:22514916

Takada, Jun

2012-03-01

134

A Geometric Diagram of Separable States  

E-print Network

This paper present a geometric diagram of a separable state: If a mixed state $\\sigma $ is separable, there are $2^{nS(\\sigma)}$ linearly independant product vectors which span the same Hilbert space as the $2^{nS(\\sigma)}$ ``likely'' strings of $\\sigma ^{\\otimes n}$ do. This diagram results in a criterion for separability which is strictly stronger than the inorder criterion in [M.A. Nielsen and J. Kempe, Phys. Rev. Lett. 86, 5184 (2001)]. This means that the number of product bases of states of a system has close link to the nonlocality of the system.

Ping Xing Chen; Cheng Zu Li

2004-03-02

135

49 CFR 835.11 - Obtaining Board accident reports, factual accident reports, and supporting information.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Obtaining Board accident reports, factual accident reports, and supporting information. 835...BOARD EMPLOYEES § 835.11 Obtaining Board accident reports, factual accident reports, and...

2011-10-01

136

49 CFR 835.11 - Obtaining Board accident reports, factual accident reports, and supporting information.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Obtaining Board accident reports, factual accident reports, and supporting information. 835...BOARD EMPLOYEES § 835.11 Obtaining Board accident reports, factual accident reports, and...

2012-10-01

137

49 CFR 835.11 - Obtaining Board accident reports, factual accident reports, and supporting information.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Obtaining Board accident reports, factual accident reports, and supporting information. 835...BOARD EMPLOYEES § 835.11 Obtaining Board accident reports, factual accident reports, and...

2010-10-01

138

Segmenting Dot Patterns by Voronoi Diagram Concavity  

Microsoft Academic Search

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.

John Fairfield

1983-01-01

139

Neural network design using Voronoi diagrams  

Microsoft Academic Search

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

N. K. Bose; Amulya K. Garga

1993-01-01

140

Evaluating formal properties of feature diagram languages  

Microsoft Academic Search

Feature diagrams (FDs) are a family of popular modelling languages, mainly used for managing variability in software product lines. FDs were first introduced by Kang et al. as part of the feature-oriented domain analysis (FODA) method back in 1990. Since then, various extensions of FODA FDs were devised to compensate for purported ambiguity and lack of precision and expressiveness. Recently,

Patrick Heymans; Pierre-yves Schobbens; Jean-christophe Trigaux; Yves Bontemps; Raimundas Matulevicius; Andreas Classen

2008-01-01

141

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

142

Bregman Voronoi Diagrams: Properties, Algorithms and Applications  

E-print Network

entropy of distributions. We define several types of Bregman diagrams, establish correspondences between and Object Modeling -- Geometric algorithms, languages, and systems; F.2.2 [Anal- ysis of Algorithms on Discrete Algorithms (SODA), pp. 746-755, 2007. Related materials are available online at http://www.csl.sony

Nielsen, Frank

143

Ferromagnetic phase diagram of neutron matter  

E-print Network

The magnetic properties of matter under extreme conditions are of particular importance to understanding the neutron star interior. One contributing factor to the magnetic field of a neutron star could be the ferromagnetic phase of nuclear matter. In this letter we present a self-consistent, relativistic description of ferromagnetism in dense matter, within which the ferromagnetic phase diagram for neutron matter is calculated.

J. P. W. Diener; F. G. Scholtz

2010-06-29

144

NFHS Court and Field Diagram Guide.  

ERIC Educational Resources Information Center

This guide contains a comprehensive collection of diagrams and specifications of playing fields and courts used in interscholastic and recreational sports, along with information on how to set up various formats of tournament drawings, how to compute golf handicaps, and how to convert metric-to-English distances. Lists are provided of national…

Gillis, John, Ed.

145

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

146

Revised state diagram of Laponite dispersions  

Microsoft Academic Search

We propose a state diagram of charged disk-like mineral particle (Laponite) dispersions as a function of the Laponite concentration (C) and the concentration of added salt (Cs), based on simple observation and light-scattering measurements. At low C or high Cs the dispersions separate into two domains due to sedimentation of Laponite aggregates, while at high C and low Cs they

Philippe Mongondry; Jean François Tassin; Taco Nicolai

2005-01-01

147

Shared Variables Interaction Diagrams Rajeev Alur  

E-print Network

of an SVID, an action corresponds to, possibly multiple, reading/writing of shared variables. The actions that the problem can be solved in linear-time when all the variables are read-shared but write- exclusive. BenefitsShared Variables Interaction Diagrams Rajeev Alur Department of Computer and Information Science

Grosu, Radu

148

The Keynesian Diagram: A Cross to Bear?  

ERIC Educational Resources Information Center

In elementary economics courses students are often introduced to the basic concepts of macroeconomics through very simplified static models, and the concept of a macroeconomic equilibrium is generally explained with the help of an aggregate demand/aggregate supply (AD/AS) model and an income/expenditure model (via the Keynesian cross diagram).…

Fleck, Juergen

149

One Parameter Bifurcation Diagram for Chua's Circuit  

E-print Network

One Parameter Bifurcation Diagram for Chua's Circuit MIREILLE E. BROUCKE Abstract -The objective of this letter is to report on the usefulness of a l-dimensional map for characterizing the dynamics of a third-order piece- wise-linear circuit. The map is used to reproduce period-doubling birfurca- tions

Broucke, Mireille E.

150

Testing for monotonicity in the Hubble diagram  

E-print Network

General relativistic kinematics and the cosmological principle alone imply a monotonicity constraint in the Hubble diagram, which we confront to present-day supernova data. We use the running gradient method of statistical inference by Hall & Heckman (2000). We find no significant departure from monotonicity. The method seems well adapted and we recommend its use with future data.

Nicolai Meinshausen; John Rice; Thomas Schücker

2006-12-19

151

Dynamic Tactile Diagram Simplification on Refreshable Displays  

ERIC Educational Resources Information Center

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,…

Rastogi, Ravi; Pawluk, Dianne T. V.

2013-01-01

152

Recognition of Hand Drawn Chemical Diagrams  

Microsoft Academic Search

Chemists often use hand-drawn structural diagrams to capture and communicate ideas about organic com- pounds. However, the software available today for spec- ifying these structures to a computer relies on a tra- ditional mouse and keyboard interface, and as a re- sult lacks the ease of use, naturalness, and speed of drawing on paper. In response, we have developed a

Tom Y. Ouyang; Randall Davis

2007-01-01

153

Constructing Causal Diagrams to Learn Deliberation  

ERIC Educational Resources Information Center

Policy problems like "What should we do about global warming?" are ill-defined in large part because we do not agree on a system to represent them the way we agree Algebra problems should be represented by equations. As a first step toward building a policy deliberation tutor, we investigated: (a) whether causal diagrams help students learn to…

Easterday, Matthew W.; Aleven, Vincent; Scheines, Richard; Carver, Sharon M.

2009-01-01

154

Extended Activity Diagrams for Adaptive Workflow Modelling  

Microsoft Academic Search

Activity diagrams are a recognized form of modelling real time systems and have been included in the list of UML techniques for modelling the dynamic aspects of object oriented systems. In this paper, we explain how workflow techniques can be used for developing models of larger chunks of systems. These chunks are expressed through the use of worklets. This can

Elizabeth Chang; E. Gautama; Tharam S. Dillon

2001-01-01

155

Spectrum Analyzer Basics Simplified Block Diagram  

E-print Network

Spectrum Analyzer Basics Simplified Block Diagram Major Controls Frequency Sweep Set Start { Hit MKR-> in the MARKER/LINE CURSOR group. { Use the softkeys to move the marker to the maximum and the CONTmode (it sometimes gets confused and stuck in a single-sweep mode) { If the analyzer complains about

Kuhn, William B.

156

NTNU Java: Free-Body Force Diagram  

NSDL National Science Digital Library

This applet illustrates the forces on a block on an inclined plane. A free-body diagram shows the gravitational, normal, frictional and net force vectors. The weight, angle of the plane, and coefficient of friction can be changed by the user. The user can also apply an external force to the block. The motion resulting from the forces is not shown.

Hwang, Fu-Kwun

2005-02-07

157

Towards Flexible Graphical Communication Using Adaptive Diagrams  

E-print Network

, life- less objects reflecting their origin in print media, the computer of the near future will provide their origin in print media, the computer of the near future will provide more flexible visual computer. There are five main differences between the old print media based view of diagrams and this new view based

Marriott, Kimbal

158

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

159

APRICODD: Approximate Policy Construction Using Decision Diagrams  

Microsoft Academic Search

We propose a method of approximate dynamic programming for Markov decision processes (MDPs) using algebraic decision diagrams (ADDs). We produce near-optimal value functions and policies with much lower time and space requirements than exact dynamic programming. Our method reduces the sizes of the intermediate value functions generated during value iteration by replacing the values at the terminals of the ADD

Robert St-aubin; Jesse Hoey; Craig Boutilier

2000-01-01

160

Rear-end accident victims. Importance of understanding the accident.  

PubMed Central

Family physicians regularly treat victims of rear-end vehicle accidents. This article describes how taking a detailed history of the accident and understanding the significance of the physical events is helpful in understanding and anticipating patients' morbidity and clinical course. Eight questions to ask patients are suggested to help physicians understand the severity of injury. PMID:8495140

Sehmer, J. M.

1993-01-01

161

Stress in accident and post-accident management at Chernobyl  

Microsoft Academic Search

The effects of the Chernobyl nuclear accident on the psychology of the affected population have been much discussed. The psychological dimension has been advanced as a factor explaining the emergence, from 1990 onwards, of a post-accident crisis in the main CIS countries affected. This article presents the conclusions of a series of European studies, which focused on the consequences of

Philippe Girard; Gilles Heriard Dubreuil

1996-01-01

162

Expert-control accident mitigation  

Microsoft Academic Search

An effective accident mitigation system (AMS) combines technologies from several different areas. The end product allows the operator to select a rational course of action in a limited time. The system is comparable to having process, cost and maintenance engineers observing the process 24 hours a day. By implementing an AMS, operators will be able to reduce accidents and plant

Stacklin

1989-01-01

163

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

164

Credible investigation of air accidents  

Microsoft Academic Search

Within the United Kingdom the Air Accidents Investigation Branch (AAIB) has been used as a model for the other transport modes accident investigation bodies. Government Ministers considered that the AAIB’s approach had established the trust of the public and the aviation industry in its ability to conduct independent and objective investigations. The paper will examine the factors that are involved

K Smart

2004-01-01

165

49 CFR 230.22 - Accident reports.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 2012-10-01 false Accident reports. 230.22 Section 230.22 Transportation... Recordkeeping Requirements § 230.22 Accident reports. In the case of an accident due to failure, from any cause, of...

2012-10-01

166

49 CFR 230.22 - Accident reports.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 2011-10-01 false Accident reports. 230.22 Section 230.22 Transportation... Recordkeeping Requirements § 230.22 Accident reports. In the case of an accident due to failure, from any cause, of...

2011-10-01

167

49 CFR 845.40 - Accident report.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Accident report. 845.40 Section 845...RULES OF PRACTICE IN TRANSPORTATION; ACCIDENT/INCIDENT HEARINGS AND REPORTS Board Reports § 845.40 Accident report. (a) The Board will...

2012-10-01

168

49 CFR 195.54 - Accident reports.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Accident reports. 195.54 Section 195...HAZARDOUS LIQUIDS BY PIPELINE Annual, Accident, and Safety-Related Condition Reporting § 195.54 Accident reports. (a) Each operator...

2012-10-01

169

49 CFR 845.40 - Accident report.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Accident report. 845.40 Section 845...RULES OF PRACTICE IN TRANSPORTATION; ACCIDENT/INCIDENT HEARINGS AND REPORTS Board Reports § 845.40 Accident report. (a) The Board will...

2011-10-01

170

49 CFR 195.54 - Accident reports.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Accident reports. 195.54 Section 195...HAZARDOUS LIQUIDS BY PIPELINE Annual, Accident, and Safety-Related Condition Reporting § 195.54 Accident reports. (a) Each operator...

2011-10-01

171

28 CFR 301.106 - Repetitious accidents.  

Code of Federal Regulations, 2012 CFR

... 2012-07-01 false Repetitious accidents. 301.106 Section 301.106 ...INC., DEPARTMENT OF JUSTICE INMATE ACCIDENT COMPENSATION General § 301.106 Repetitious accidents. If an inmate worker is involved...

2012-07-01

172

28 CFR 301.106 - Repetitious accidents.  

Code of Federal Regulations, 2011 CFR

... 2011-07-01 false Repetitious accidents. 301.106 Section 301.106 ...INC., DEPARTMENT OF JUSTICE INMATE ACCIDENT COMPENSATION General § 301.106 Repetitious accidents. If an inmate worker is involved...

2011-07-01

173

32 CFR 644.532 - Reporting accidents.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2011-07-01 true Reporting accidents. 644.532 Section 644.532 ...Improvements § 644.532 Reporting accidents. Immediately upon receipt of information of an accident involving, or appearing to...

2012-07-01

174

49 CFR 195.54 - Accident reports.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Accident reports. 195.54 Section 195...HAZARDOUS LIQUIDS BY PIPELINE Annual, Accident, and Safety-Related Condition Reporting § 195.54 Accident reports. (a) Each operator...

2010-10-01

175

32 CFR 644.532 - Reporting accidents.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 true Reporting accidents. 644.532 Section 644.532 ...Improvements § 644.532 Reporting accidents. Immediately upon receipt of information of an accident involving, or appearing to...

2010-07-01

176

49 CFR 230.22 - Accident reports.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 2010-10-01 false Accident reports. 230.22 Section 230.22 Transportation... Recordkeeping Requirements § 230.22 Accident reports. In the case of an accident due to failure, from any cause, of...

2010-10-01

177

48 CFR 36.513 - Accident prevention.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Accident prevention. 36.513 Section 36...CONTRACTS Contract Clauses 36.513 Accident prevention. (a) The contracting...shall insert the clause at 52.236-13, Accident Prevention, in...

2010-10-01

178

22 CFR 102.8 - Reporting accidents.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Reporting accidents. 102.8 Section 102.8 Foreign Relations... CIVIL AVIATION United States Aircraft Accidents Abroad § 102.8 Reporting accidents. (a) To airline and Civil...

2010-04-01

179

49 CFR 845.40 - Accident report.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Accident report. 845.40 Section 845...RULES OF PRACTICE IN TRANSPORTATION; ACCIDENT/INCIDENT HEARINGS AND REPORTS Board Reports § 845.40 Accident report. (a) The Board will...

2010-10-01

180

28 CFR 301.106 - Repetitious accidents.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false Repetitious accidents. 301.106 Section 301.106 ...INC., DEPARTMENT OF JUSTICE INMATE ACCIDENT COMPENSATION General § 301.106 Repetitious accidents. If an inmate worker is involved...

2010-07-01

181

Generalized Voronoi Diagrams for a Ladder: II. Efficient Construction of the Diagram  

Microsoft Academic Search

We present a collection of algorithms, all running in timeO(n\\u000a 2 logn ? (n)\\u000a o(?(n)3)) for some fixed integers(where ?(n) is the inverse Ackermann's function), for constructing a skeleton representation of a suitably generalized “Voronoi diagram”\\u000a for a ladder moving in a two-dimensional space bounded by polygonal barriers consisting ofn line segments. This diagram, which is a two-dimensional subcomplex of

Colm Ó'dúnlaing; Micha Sharir; Chee-keng Yap

1987-01-01

182

Industrial accidents triggered by lightning.  

PubMed

Natural disasters can cause major accidents in chemical facilities where they can lead to the release of hazardous materials which in turn can result in fires, explosions or toxic dispersion. Lightning strikes are the most frequent cause of major accidents triggered by natural events. In order to contribute towards the development of a quantitative approach for assessing lightning risk at industrial facilities, lightning-triggered accident case histories were retrieved from the major industrial accident databases and analysed to extract information on types of vulnerable equipment, failure dynamics and damage states, as well as on the final consequences of the event. The most vulnerable category of equipment is storage tanks. Lightning damage is incurred by immediate ignition, electrical and electronic systems failure or structural damage with subsequent release. Toxic releases and tank fires tend to be the most common scenarios associated with lightning strikes. Oil, diesel and gasoline are the substances most frequently released during lightning-triggered Natech accidents. PMID:20817399

Renni, Elisabetta; Krausmann, Elisabeth; Cozzani, Valerio

2010-12-15

183

The geometry of on-shell diagrams  

NASA Astrophysics Data System (ADS)

The fundamental role of on-shell diagrams in quantum field theory has been recently recognized. On-shell diagrams, or equivalently bipartite graphs, provide a natural bridge connecting gauge theory to powerful mathematical structures such as the Grassmannian. We perform a detailed investigation of the combinatorial and geometric objects associated to these graphs. We mainly focus on their relation to polytopes and toric geometry, the Grassmannian and its stratification. Our work extends the current understanding of these connections along several important fronts, most notably eliminating restrictions imposed by planarity, positivity, reducibility and edge removability. We illustrate our ideas with several explicit examples and introduce concrete methods that considerably simplify computations. We consider it highly likely that the structures unveiled in this article will arise in the on-shell study of scattering amplitudes beyond the planar limit. Our results can be conversely regarded as an expansion in the understanding of the Grassmannian in terms of bipartite graphs.

Franco, Sebastián; Galloni, Daniele; Mariotti, Alberto

2014-08-01

184

More on phase diagram of Laponite  

E-print Network

The phase diagram of a charged colloidal system (Laponite) has been investigated by dynamic light scattering in a previously unexplored range of salt and clay concentrations. Specifically the clay weight and salt molar concentrations have been varied in the ranges Cw=0.004- 0.025, Cs=(1x 10^-3- 5x 10^-3) M respectively. As in the case of free salt water samples (Cs= 1x 10^-4 M) an aging dynamics towards two different arrested phases is found in the whole examined Cw and Cs range. Moreover a transition between these two different regimes is found for each investigated salt concentration. It is clear from these measurements that a revision of the phase diagram is necessary and a new "transition" line between two different arrested states is drawn.

B. Ruzicka; L. Zulian; G. Ruocco

2005-09-09

185

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

186

Persistence diagrams of cortical surface data.  

PubMed

We present a novel framework for characterizing signals in images using techniques from computational algebraic topology. This technique is general enough for dealing with noisy multivariate data including geometric noise. The main tool is persistent homology which can be encoded in persistence diagrams. These diagrams visually show how the number of connected components of the sublevel sets of the signal changes. The use of local critical values of a function differs from the usual statistical parametric mapping framework, which mainly uses the mean signal in quantifying imaging data. Our proposed method uses all the local critical values in characterizing the signal and by doing so offers a completely new data reduction and analysis framework for quantifying the signal. As an illustration, we apply this method to a 1D simulated signal and 2D cortical thickness data. In case of the latter, extra homological structures are evident in an control group over the autistic group. PMID:19694279

Chung, Moo K; Bubenik, Peter; Kim, Peter T

2009-01-01

187

Voronoi Diagrams for Pure 1-qubit Quantum States  

E-print Network

1-qubit quantum states form a space called the three-dimensional Bloch ball. To compute Holevo capacity, Voronoi diagrams in the Bloch ball with respect to the quantum divergence have been used as a powerful tool. These diagrams basically treat mixed quantum states corresponding to points in the interior of the Bloch ball. Due to the existence of logarithm in the quantum divergence, the diagrams are not defined on pure quantum states corresponding to points on the two-dimensional sphere. This paper first defines the Voronoi diagrams for pure quantum states on the Bloch sphere by the Fubini-Study distance and the Bures distance. We also introduce other Voronoi diagrams on the sphere obtained by taking a limit of Voronoi diagrams for mixed quantum states by the quantum divergences in the Bloch ball. These diagrams are shown to be equivalent to the ordinary Voronoi diagram on the sphere.

Kimikazu Kato; Mayumi Oto; Hiroshi Imai; Keiko Imai

2006-04-14

188

The phase diagram YF-GdF  

Microsoft Academic Search

The binary phase diagram YF-GdF was studied by differential scanning calorimetry (DSC). Yttrium fluoride and gadolinium fluoride show complete miscibility in all three phases (orthorhombic room temperature phase, trigonal or hexagonal high temperature phase, liquid). The transformations between room temperature and high temperature phases are of first order and occur at 1338.6 K (YF) or 1174.8 K (GdF). Melting points

D. Klimm; I. M. Ranieri; R. Bertram; S. L. Baldochi

2008-01-01

189

Communicating Phylogeny: Evolutionary Tree Diagrams in Museums  

E-print Network

History Museum 5 Address: University of Kansas, Lawrence, KS 66045-7593, USA 6 7 Second Author: E. O. Wiley 8 Institution: Ecology & Evolutionary Biology and Biodiversity Institute 9 Address: University of Kansas, Lawrence, KS 66045...IN PRESS (EVOLUTION: EDUCATION AND OUTREACH) 1 Title: Communicating Phylogeny: Evolutionary tree diagrams in museums 2 Running Head: Communicating Phylogeny 3 First Author: Teresa MacDonald 4 Institution: University of Kansas Natural...

MacDonald, Teresa; Wiley, Edward O.

2012-01-01

190

Displaying multimedia environmental partitioning by triangular diagrams  

SciTech Connect

It is suggested that equilateral triangular diagrams are a useful method of depicting the equilibrium partitioning of organic chemicals among the three primary environmental media of the atmosphere, the hydrosphere, and the organosphere (natural organic matter and biotic lipids and waxes). The technique is useful for grouping chemicals into classes according to their partitioning tendencies, for depicting the incremental effects of substituents such as alkyl groups and chlorine, and for showing how partitioning changes in response to changes in temperature.

Lee, S.C.; Mackay, D. [Univ. of Toronto, Ontario (Canada). Dept. of Chemical Engineering and Applied Chemistry

1995-11-01

191

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

192

Reentrant phase diagram for granular superconductors  

SciTech Connect

The mean-field phase diagram of the self-charging model of a granular superconductor is calculated using the functional-integral formulation. A pronounced reentrance is obtained in quantitative agreement with a previous calculation, involving 2..pi..-antiperiodic eigenstates of the Mathieu equation. It is argued that low-lying, odd-electron-number excitations play a significant role in the thermodynamics of Josephson-junction arrays, for which the Feynman functional-integral formulation holds.

Simanek, E.

1985-07-01

193

Stability diagrams for coupled Mathieu-equations  

Microsoft Academic Search

A method is described for determining stability diagrams for coupled Mathieu-equations. The boundary curves are found by searching for those almost-periodic solutions of the differential equations for which the real part of the characteristic exponent changes from zero to a non-zero value. The method derives analytic expressions for the involved determinants and is able to find the transition curves even

J. Hansen

1985-01-01

194

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

195

The plutonium-oxygen phase diagram  

SciTech Connect

Identification of products formed by the reaction of plutonium metal with liquid water at 23{degree}C indicates that the plutonium-oxygen phase diagram is similar to the cerium-oxygen and praseodymium-oxygen diagrams. Quantitative measurements of H{sub 2} formation and analytical data suggest that a sequence of hydrolysis reactions produces oxide hydrides of trivalent plutonium, Pu{sub 2}O{sub 3}, mixed-valent oxides and PuO{sub 2}. The intermediate oxides are the n {equals} 7, 9, 10 and 12 members of the Pu{sub n}O{sub 2n{minus}2} homologous series. Properties of the residue formed by thermal decomposition of the initial hydrolysis product, plutonium monoxide monhydride (PuOH), are consistent with the formation of metastable plutonium monoxide. Crystal-chemical, thermodynamic, and kinetic factors are evaluated, but definitive assignment of the equilibrium Pu-O diagram is not possible. 22 refs., 6 figs., 1 tab.

Haschke, J.M.

1990-01-01

196

Recognition and processing of logic diagrams  

NASA Astrophysics Data System (ADS)

In this paper we present a vision system that is capable of interpreting schematic logic diagrams, i.e. determine the output as a logic function of the inputs. The system is composed of a number of modules each designed to perform a specific subtask. Each module bears a minor contribution in the form of a new mixture of known algorithms or extensions to handle actual real life image imperfections which researchers tend to ignore when they develop their theoretical foundations. The main contribution, thus, is not in any individual module, it is rather in their integration to achieve the target job. The system is organized more or less in a classical fashion. Aside from the image acquisition and preprocessing modules, interesting modules include: the segmenter, the identifier, the connector and the grapher. A good segmentation output is one reason for the success of the presented system. Several novelties exist in the presented approach. Following segmentation the type of each logic gate is determined and its topological connectivity. The logic diagram is then transformed to a directed acyclic graph in which the final node is the output logic gate. The logic function is then determined by backtracking techniques. The system is not only aimed at recognition applications. In fact its main usage may be to target other processing applications such as storage compression and graphics modification and manipulation of the diagram as is explained.

Darwish, Ahmed M.; Bashandy, Ahmed R.

1996-03-01

197

Table of Feynman diagrams of the interacting Fermion Green's function  

NASA Astrophysics Data System (ADS)

The Feynman diagrams of the Green's function expansion of fermions interacting with a nonrelativistic 2-body interaction are displayed in first, second, and third perturbative order of the interaction as 2, 10, and 74 diagrams, respectively. A name convention for the diagrams is proposed and then used to tabulate the diagrams of fourth to seventh order. The Hartree-Fock approximation summons up 2, 8, 40, and 224 of them in first through fourth order.

Mathar, Richard J.

198

Algorithms in electric power system one-line diagram creation  

Microsoft Academic Search

This paper analyzes various algorithms for the automatic generation of electric power system one-line diagrams. Historically these one-line diagrams were created manually. As these diagrams can be large, their manual creation takes a lot of time and resources, and it is also prone to errors. One possible solution to this problem is the automatic generation of one-line diagrams. Automatic visualization

Imre Lendak; Aleksandar Erdeljan; Darko Capko; Srdan Vukmirovic

2010-01-01

199

Indicator diagram of a high pressure pump for cryogenic liquid  

Microsoft Academic Search

sure cycles. The indicator diagram provides a basis for deriving quantitative relationships between pump parameters. To this end we determined experimentally the indicator diagram of a series-produced pump type NZhA-.22M and developed a method of constructing a calculated indicator diagram. It is ,difficult to produce indicator diagrams for high-pressure pumps operating on liquefied gas: ordinary general purpose indicators are unsuitable

E. N. Smirnov; V. I. Epifanova

1969-01-01

200

Voronoi Diagrams of Moving Points in the Plane  

Microsoft Academic Search

Consider a set of n points in the Euclidean plane each of which is continuously moving along a given trajectory. At each instant in time, the points define a Voronoi diagram. As the points move, the Voronoi diagram changes continuously, but at certain critical instants in time, topological events occur that cause a change in the Delaunay diagram. In this

Leonidas J. Guibas; Joseph S. B. Mitchell; Thomas Roos

1991-01-01

201

Symbolic Reasoning with Weighted and Normalized Decision Diagrams  

Microsoft Academic Search

Several variants of Bryant's ordered binary decision diagrams have been suggested in the literature to reason about discrete functions. In this paper, we introduce a generic notion of weighted decision diagrams that captures many of them and present criteria for canonic- ity. As a special instance of such weighted diagrams, we introduce a new BDD-variant for real-valued functions, called normalized

Jörn Ossowski; Christel Baier

2006-01-01

202

A vector diagram of Maxwell's equations for chiral media  

Microsoft Academic Search

A vector diagram of Maxwell's time-harmonic equations in homogeneous isotropic media is proposed and derived to include chiral media. This diagram may be used to obtain a number of common relationships between fields, potentials and sources by equating appropriate components of the vectors in it. The construction of the diagram is based on the formal similarity between many theorems of

S. Uckun

1998-01-01

203

Assessing the Comprehension of UML Class Diagrams via Eye Tracking  

Microsoft Academic Search

Eye-tracking equipment is used to assess how well a subject comprehends UML class diagrams. The results of a study are presented in which eye movements are captured in a non-obtrusive manner as users performed various comprehension tasks on UML class diagrams. The goal of the study is to identify specific characteristics of UML class diagrams, such as layout, color, and

Shehnaaz Yusuf; Huzefa H. Kagdi; Jonathan I. Maletic

2007-01-01

204

The Family Diagram and Genogram: Comparisons and Contrasts  

Microsoft Academic Search

The family diagram and its derivative the genogram are widely used in marriage and family therapy, other mental health disciplines, and family medicine. After a brief history of the origins of the family diagram and genogram, several different areas are compared in order to help distinguish differences between family diagrams and genograms. The results of these evaluations illustrate some similarities

John F. Butler

2008-01-01

205

The Classroom as Rhizome: New Strategies for Diagramming Knotted Interactions  

ERIC Educational Resources Information Center

This article calls attention to the unexamined role of diagrams in educational research and offers examples of alternative diagramming practices or tools that shed light on classroom interaction as a rhizomatic process. Drawing extensively on the work of Latour, Deleuze and Guattari, and Chatelet, this article explores the power of diagramming as…

de Freitas, Elizabeth

2012-01-01

206

Density-Enthalpy Phase Diagram 0D Boiler Simulation  

E-print Network

Density-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research Finite Transitions #12;Density-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research;Density-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research Goal

Vuik, Kees

207

DARLS: Differencing and Merging Diagrams Using Dual View, Animation,  

E-print Network

DARLS: Differencing and Merging Diagrams Using Dual View, Animation, Re-Layout, Layers, Animation, Re-Layout, Layers and a Storyboard, short "DARLS". It is targeted at diagrams where node and edge. It presents the union of nodes and edges in figure 1. DARLS showing two versions of a diagram, which

Stürzlinger, Wolfgang

208

Dinosaur Extinction: Causal Loop Diagram of Earth Feedback System  

NSDL National Science Digital Library

This site features a causal loop diagram from system dynamics methodology showing the solar-earth-space energy flow system (the dominant flow system driving earth's surficial systems, including the biosphere) and interactive natural earthly processes that influence it. Also included is a discussion of the diagram, and a link to a page that explains how to read causal loop diagrams.

Mclean, Dewey M.; Tech, Virginia

209

Modelling network problems with power flow equations and diagrams  

Microsoft Academic Search

This paper focuses on the modelling of electrical utility networks, their problems and solutions in a network-planning environment. Equivalent single-line diagrams, vector diagrams and power flow diagrams are derived and used for each specific problem within a specific network

F. J. Rossouw; H. J. Beukes; J. H. R. Enslin

1999-01-01

210

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

211

49 CFR 382.303 - Post-accident testing.  

Code of Federal Regulations, 2010 CFR

...the vehicle, if the accident involved the loss of...local law for a moving traffic violation arising from the accident, if the accident involved...local law for a moving traffic violation arising from the accident, if the accident...

2010-10-01

212

Underreporting of maritime accidents to vessel accident databases.  

PubMed

Underreporting of maritime accidents is a problem not only for authorities trying to improve maritime safety through legislation, but also to risk management companies and other entities using maritime casualty statistics in risk and accident analysis. This study collected and compared casualty data from 01.01.2005 to 31.12.2009, from IHS Fairplay and the maritime authorities from a set of nations. The data was compared to find common records, and estimation of the true number of occurred accidents was performed using conditional probability given positive dependency between data sources, several variations of the capture-recapture method, calculation of best case scenario assuming perfect reporting, and scaling up a subset of casualty information from a marine insurance statistics database. The estimated upper limit reporting performance for the selected flag states ranged from 14% to 74%, while the corresponding estimated coverage of IHS Fairplay ranges from 4% to 62%. On average the study results document that the number of unreported accidents makes up roughly 50% of all occurred accidents. Even in a best case scenario, only a few flag states come close to perfect reporting (94%). The considerable scope of underreporting uncovered in the study, indicates that users of statistical vessel accident data should assume a certain degree of underreporting, and adjust their analyses accordingly. Whether to use correction factors, a safety margin, or rely on expert judgment, should be decided on a case by case basis. PMID:21819835

Hassel, Martin; Asbjørnslett, Bjørn Egil; Hole, Lars Petter

2011-11-01

213

CANDU safety under severe accidents.  

National Technical Information Service (NTIS)

The characteristics of the CANDU reactor relevant to severe accidents are set first by the inherent properties of the design, and second by the Canadian safety/licensing approach. Probabilistic safety assessment studies have been performed on operating CA...

V. G. Snell, J. Q. Howieson, S. Alikhan, G. M. Frescura, F. King

1988-01-01

214

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

215

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

Code of Federal Regulations, 2011 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...

2011-10-01

216

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

Code of Federal Regulations, 2012 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...

2012-10-01

217

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

218

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

Code of Federal Regulations, 2010 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...

2010-10-01

219

Analysis of commercial mini-bus accidents  

Microsoft Academic Search

This paper presents a study of mini-bus traffic accidents aimed at gaining insight into the factors affecting accident occurrence and severity. Understanding these factors can help to bring forth realistic strategies to improve the safety of these buses. Two disaggregate models related to the time until accident occurrence and the number of accident injuries were specified and estimated. The models

Mohammad M. Hamed; A. S. Jaradat; Said M. Easa

1998-01-01

220

Risk and protection factors in fatal accidents  

Microsoft Academic Search

This paper aims at addressing the interest and appropriateness of performing accident severity analyses that are limited to fatal accident data. Two methodological issues are specifically discussed, namely the accident-size factors (the number of vehicles in the accident and their level of occupancy) and the comparability of the baseline risk. It is argued that – although these two issues are

Emmanuelle Dupont; Heike Martensen; Eleonora Papadimitriou; George Yannis

2010-01-01

221

Object-Oriented Bayesian Networks (OOBN) for Aviation Accident Modeling and Technology Portfolio Impact Assessment  

NASA Technical Reports Server (NTRS)

The concern for reducing aviation safety risk is rising as the National Airspace System in the United States transforms to the Next Generation Air Transportation System (NextGen). The NASA Aviation Safety Program is committed to developing an effective aviation safety technology portfolio to meet the challenges of this transformation and to mitigate relevant safety risks. The paper focuses on the reasoning of selecting Object-Oriented Bayesian Networks (OOBN) as the technique and commercial software for the accident modeling and portfolio assessment. To illustrate the benefits of OOBN in a large and complex aviation accident model, the in-flight Loss-of-Control Accident Framework (LOCAF) constructed as an influence diagram is presented. An OOBN approach not only simplifies construction and maintenance of complex causal networks for the modelers, but also offers a well-organized hierarchical network that is easier for decision makers to exploit the model examining the effectiveness of risk mitigation strategies through technology insertions.

Shih, Ann T.; Ancel, Ersin; Jones, Sharon M.

2012-01-01

222

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. PMID:3928359

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

1985-01-01

223

y? Diagram, a powerful optical design method for laser systems.  

PubMed

We present a new method for synthesizing and analyzing laser systems based on the use of the y? diagram. The diagram is commonly used to represent two rays, the marginal and the chief rays, as they propagate through an optical system. Since a Gaussian beam can be represented by two rays, it is possible to use the y? diagram to represent these rays. This results in a representation of the beam as a single ray line on the y? diagram with simple graphic interpretations for the beam parameters. An equivalent representation of the Gaussian beam on the u? diagram is also presented and discussed. Complex design problems may be reduced to simple graphic problems, which often lead directly to algebraic solutions. Examples of y? diagrams are given for beam transfer through simple optical systems, including gradient optics. Diagram transformations are discussed and design examples are given of a three-element afocal system and a three-element collimator. PMID:20725196

Kessler, D; Shack, R V

1992-05-20

224

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. PMID:22844438

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

2012-01-01

225

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.

226

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

227

More on the Phase Diagram of Laponite  

Microsoft Academic Search

The phase diagram of a charged colloidal system (Laponite) has been\\u000ainvestigated by dynamic light scattering in a previously unexplored range of\\u000asalt and clay concentrations. Specifically the clay weight and salt molar\\u000aconcentrations have been varied in the ranges Cw=0.004- 0.025, Cs=(1x 10^-3- 5x\\u000a10^-3) M respectively. As in the case of free salt water samples (Cs= 1x 10^-4

B. Ruzicka; L. Zulian; G. Ruocco

2006-01-01

228

The QCD Phase Diagram: Expectations and Challenges  

E-print Network

A survey is given of recent QCD theory advances concerning the phase diagram, in particular the indications for a critical point and adjacent first order phase transition at high baryo-chemical potential, and the new ideas concerning a further phase at high $\\mu_{B}$, the quarkyonic matter phase. The latter state might finally explain the hadro-chemical equilibrium freeze-out points from A+A collisions at energies below SPS energy. We review several event-by-event fluctuation signals that promise to shed a light on the existence of a critical point, and we discuss its possible reflection in recent lattice QCD calculations.

Reinhard Stock

2009-09-03

229

The efficiency and effectiveness of utilizing diagrams in interviews: an assessment of participatory diagramming and graphic elicitation  

PubMed Central

Background This paper focuses on measuring the efficiency and effectiveness of two diagramming methods employed in key informant interviews with clinicians and health care administrators. The two methods are 'participatory diagramming', where the respondent creates a diagram that assists in their communication of answers, and 'graphic elicitation', where a researcher-prepared diagram is used to stimulate data collection. Methods These two diagramming methods were applied in key informant interviews and their value in efficiently and effectively gathering data was assessed based on quantitative measures and qualitative observations. Results Assessment of the two diagramming methods suggests that participatory diagramming is an efficient method for collecting data in graphic form, but may not generate the depth of verbal response that many qualitative researchers seek. In contrast, graphic elicitation was more intuitive, better understood and preferred by most respondents, and often provided more contemplative verbal responses, however this was achieved at the expense of more interview time. Conclusion Diagramming methods are important for eliciting interview data that are often difficult to obtain through traditional verbal exchanges. Subject to the methodological limitations of the study, our findings suggest that while participatory diagramming and graphic elicitation have specific strengths and weaknesses, their combined use can provide complementary information that would not likely occur with the application of only one diagramming method. The methodological insights gained by examining the efficiency and effectiveness of these diagramming methods in our study should be helpful to other researchers considering their incorporation into qualitative research designs. PMID:18691410

Umoquit, Muriah J; Dobrow, Mark J; Lemieux-Charles, Louise; Ritvo, Paul G; Urbach, David R; Wodchis, Walter P

2008-01-01

230

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

231

Accurate phase diagram of tetravalent DNA nanostars  

E-print Network

We evaluate, by means of molecular dynamics simulations employing a realistic DNA coarse-grained model, the phase behaviour and the structural and dynamic properties of tetravalent DNA nanostars, i.e. nanoconstructs completely made of DNA. We find that, as the system is cooled down, tetramers undergo a gas--liquid phase separation in a region of concentrations which, if the difference in salt concentration is taken into account, is comparable with the recently measured experimental phase diagram [S. Biffi \\textit{et al}, Proc. Natl. Acad. Sci, \\textbf{110}, 15633 (2013)]. We also present a mean-field free energy for modelling the phase diagram based on the bonding contribution, derived by Wertheim in its studies of associating liquids, combined with mass action law expressions appropriate for DNA binding and a numerically evaluated reference free energy. The resulting free energy qualitatively reproduces the numerical data. Finally, we report information on the nanostar structure, e.g. geometry and flexibility of the single tetramer and of the collective behaviour, providing a useful reference for future small angle scattering experiments, for all investigated temperatures and concentrations.

Lorenzo Rovigatti; Francesca Bomboi; Francesco Sciortino

2014-01-13

232

Magnetic phase diagrams of UNiGe  

SciTech Connect

UNiGe undergoes two magnetic transitions in zero field. Here, the magnetic diagrams of UNiGe for B {parallel} b and B {parallel} c are reported. We performed temperatures scans of the magnetization in static magnetic fields up to 19.5T applied along the b and c axes. For both orientations 3 magnetic phases have been identified in the B-T diagrams. We confirmed the previously reported phase boundaries for B {parallel} c, and in addition we determined the location of the phase boundaries for B {parallel} b. We discuss a possible relationship of the two zero-field antiferromagnetic phases (commensurate: T<42K; incommensurate: 42K

Nakotte, H. [Los Alamos National Lab., NM (United States); Hagmusa, I.H.; Klaasse, J.C.P. [Univ. of Amsterdam (Netherlands). Van der Waals-Zeeman Inst.; Nakotte, H.; Lacerda, A.H. [Los Alamos National Lab., NM (United States); Hagmusa, I.H.; Klaasse, J.C.P. [Univ. of Amsterdam (Netherlands). Van der Waals-Zeeman Institute] [and others

1997-11-01

233

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

234

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

235

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

236

Revisiting the phase diagram of hard ellipsoids  

NASA Astrophysics Data System (ADS)

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.

Odriozola, Gerardo

2012-04-01

237

Nuclear accident dosimetry intercomparison studies.  

PubMed

Twenty-two nuclear accident dosimetry intercomparison studies utilizing the fast-pulse Health Physics Research Reactor at the Oak Ridge National Laboratory have been conducted since 1965. These studies have provided a total of 62 different organizations a forum for discussion of criticality accident dosimetry, an opportunity to test their neutron and gamma-ray dosimetry systems under a variety of simulated criticality accident conditions, and the experience of comparing results with reference dose values as well as with the measured results obtained by others making measurements under identical conditions. Sixty-nine nuclear accidents (27 with unmoderated neutron energy spectra and 42 with eight different shielded spectra) have been simulated in the studies. Neutron doses were in the 0.2-8.5 Gy range and gamma doses in the 0.1-2.0 Gy range. A total of 2,289 dose measurements (1,311 neutron, 978 gamma) were made during the intercomparisons. The primary methods of neutron dosimetry were activation foils, thermoluminescent dosimeters, and blood sodium activation. The main methods of gamma dose measurement were thermoluminescent dosimeters, radiophotoluminescent glass, and film. About 68% of the neutron measurements met the accuracy guidelines (+/- 25%) and about 52% of the gamma measurements met the accuracy criterion (+/- 20%) for accident dosimetry. PMID:2777549

Sims, C S

1989-09-01

238

Using Eye Tracking to Investigate Semantic and Spatial Representations of Scientific Diagrams During Text-Diagram Integration  

NASA Astrophysics Data System (ADS)

We investigated strategies used by readers when reading a science article with a diagram and assessed whether semantic and spatial representations were constructed while reading the diagram. Seventy-one undergraduate participants read a scientific article while tracking their eye movements and then completed a reading comprehension test. Our results showed that the text-diagram referencing strategy was commonly used. However, some readers adopted other reading strategies, such as reading the diagram or text first. We found all readers who had referred to the diagram spent roughly the same amount of time reading and performed equally well. However, some participants who ignored the diagram performed more poorly on questions that tested understanding of basic facts. This result indicates that dual coding theory may be a possible theory to explain the phenomenon. Eye movement patterns indicated that at least some readers had extracted semantic information of the scientific terms when first looking at the diagram. Readers who read the scientific terms on the diagram first tended to spend less time looking at the same terms in the text, which they read after. Besides, presented clear diagrams can help readers process both semantic and spatial information, thereby facilitating an overall understanding of the article. In addition, although text-first and diagram-first readers spent similar total reading time on the text and diagram parts of the article, respectively, text-first readers had significantly less number of saccades of text and diagram than diagram-first readers. This result might be explained as text-directed reading.

Jian, Yu-Cin; Wu, Chao-Jung

2014-10-01

239

Road characteristics and bicycle accidents.  

PubMed

In Umeå, Sweden, defects in the physical road surface contributed to nearly half of the single bicycle accidents. The total social cost of these injuries to people amount to at least SEK 20 million (SEK 60,000 or about USD 8,500 per accident), which corresponds to the estimated loss of "eight life equivalents a year". Improved winter maintenance seems to have the greatest injury prevention potential and would probably reduce the number of injuries considerably, whereas improved road quality and modification of kerbs would reduce the most severe injuries. A local traffic safety program should try to prevent road accidents instead of handling the consequences of them. In accordance with Parliament decisions on traffic we would like to see increased investment in measures favoring bicycle traffic, where cycling is seen as a solution, not as a problem. PMID:8983101

Nyberg, P; Björnstig, U; Bygren, L O

1996-12-01

240

A Replacement for Voronoi Diagrams of Near Linear Size  

Microsoft Academic Search

Abstract: For a set P of n points in R^d, we define a new type of space decomposition. The new diagram provides an ε-approximation to the distance function associated with the Voronoi diagram of P, while being of near linear size, for d ≥ 2. This contrasts with the standard Voronoi diagram that has complexity Ω(n^⌈d\\/2⌉) in the worst case.

Sariel Har-peled

2001-01-01

241

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

242

Basic primitives for molecular diagram sketching  

PubMed Central

A collection of primitive operations for molecular diagram sketching has been developed. These primitives compose a concise set of operations which can be used to construct publication-quality 2 D coordinates for molecular structures using a bare minimum of input bandwidth. The input requirements for each primitive consist of a small number of discrete choices, which means that these primitives can be used to form the basis of a user interface which does not require an accurate pointing device. This is particularly relevant to software designed for contemporary mobile platforms. The reduction of input bandwidth is accomplished by using algorithmic methods for anticipating probable geometries during the sketching process, and by intelligent use of template grafting. The algorithms and their uses are described in detail. PMID:20923555

2010-01-01

243

Energy Level Diagrams for Black Hole Orbits  

E-print Network

A spinning black hole with a much smaller black hole companion forms a fundamental gravitational system, like a colossal classical analog to an atom. In an appealing if imperfect analogy to atomic physics, this gravitational atom can be understood through a discrete spectrum of periodic orbits. Exploiting a correspondence between the set of periodic orbits and the set of rational numbers, we are able to construct periodic tables of orbits and energy level diagrams of the accessible states around black holes. We also present a closed form expression for the rational q, thereby quantifying zoom-whirl behavior in terms of spin, energy, and angular momentum. The black hole atom is not just a theoretical construct, but corresponds to extant astrophysical systems detectable by future gravitational wave observatories.

Janna Levin

2009-07-29

244

Bianchi I meets the Hubble diagram  

E-print Network

We improve existing fits of the Bianchi I metric to the Hubble diagram of supernovae and find an intriguing yet non-significant signal for anisotropy that should be verified or falsified in the near future by the Large Synoptic Survey Telescope. Since the literature contains two different formulas for the apparent luminosity as a function of time of flight in Bianchi I metrics, we present an independent derivation confirming the result by Saunders (1969). The present fit differs from earlier ones by Koivisto & Mota and by Campanelli et al. in that we use Saunders' formula, a larger sample of supernovae, Union 2 and JLA, and we use the general Bianchi I metric with three distinct eigenvalues.

Schucker, Thomas; Valent, Galliano

2014-01-01

245

Thermal phase diagrams of columnar liquid crystals  

E-print Network

In order to understand the possible sequence of transitions from the disordered columnar phase to the helical phase in hexa(hexylthio)triphenylene (HHTT), we study a three-dimensional planar model with octupolar interactions inscribed on a triangular lattice of columns. We obtain thermal phase diagrams using a mean-field approximation and Monte Carlo simulations. These two approaches give similar results, namely, in the quasi one-dimensional regime, as the temperature is lowered, the columns order with a linear polarization, whereas helical phases develop at lower temperatures. The helicity patterns of the helical phases are determined by the exact nature of the frustration in the system, itself related to the octupolar nature of the molecules.

G. Lamoureux; A. Caillé; D. Sénéchal

1998-01-07

246

Bayesian Image Reconstruction Based on Voronoi Diagrams  

E-print Network

We present a Bayesian Voronoi image reconstruction technique (VIR) for interferometric data. Bayesian analysis applied to the inverse problem allows us to derive the a-posteriori probability of a novel parameterization of interferometric images. We use a variable Voronoi diagram as our model in place of the usual fixed pixel grid. A quantization of the intensity field allows us to calculate the likelihood function and a-priori probabilities. The Voronoi image is optimized including the number of polygons as free parameters. We apply our algorithm to deconvolve simulated interferometric data. Residuals, restored images and chi^2 values are used to compare our reconstructions with fixed grid models. VIR has the advantage of modeling the image with few parameters, obtaining a better image from a Bayesian point of view.

G. F. Cabrera; S. Casassus; N. Hitschfeld

2007-12-26

247

Bianchi I meets the Hubble diagram  

NASA Astrophysics Data System (ADS)

We improve existing fits of the Bianchi I metric to the Hubble diagram of supernovae and find an intriguing yet non-significant signal for anisotropy that should be verified or falsified in the near future by the Large Synoptic Survey Telescope. Since the literature contains two different formulas for the apparent luminosity as a function of time of flight in Bianchi I metrics, we present an independent derivation confirming the result by Saunders. The present fit differs from earlier ones by Koivisto & Mota and by Campanelli et al. in that we use Saunders' formula, a larger sample of supernovae, Union 2 and Joint Light curve Analysis, and we use the general Bianchi I metric with three distinct eigenvalues.

Schücker, Thomas; Tilquin, André; Valent, Galliano

2014-11-01

248

Road Traffic Accidents in Kazakhstan  

PubMed Central

Background: The article provides the analysis of death rates in road traffic accidents in Kazakhstan from 2004 to 2010 and explores the use of sanitary aviation. Methods: Data of fatalities caused by road traffic accidents were collected and analysed. Descriptive and analytical methods of epidemiology and biomedical statistics were applied. Results: Totaly 27,003 people died as a result of road traffic accidents in this period. The death rate for the total population due to road traffic accidents was 25.0±2.10/0000. The death rate for men was (38.3±3.20/0000), which was higher (P<0.05) than that for women (12.6±1.10/0000). High death rates in the entire male population were identified among men of 30–39 years old, whereas the highest rates for women were attributed to the groups of 50–59 years old and 70–79 years old. In time dynamics, death rates tended to decrease: the total population (Tdec=?2.4%), men (Tdec=?2.3%) and women (Tdec=?1.4%). When researching territorial relevance, the rates were established as low (to 18.30/0000), average (between 18.3 and 24.00/0000) and high (from 24.00/0000 and above). Thus, the regions with high rates included Akmola region (24.30/0000), Mangistau region (25.90/0000), Zhambyl region (27.30/0000), Almaty region (29.30/0000) and South Kazakhstan region (32.40/0000). Conclusion: The identified epidemiological characteristics of the population deaths rates from road traffic accidents should be used in integrated and targeted interventions to enhance prevention of injuries in accidents. PMID:23641400

AUBAKIROVA, Alma; KOSSUMOV, Alibek; IGISSINOV, Nurbek

2013-01-01

249

Band diagrams of layered plasmonic metamaterials  

NASA Astrophysics Data System (ADS)

We introduce a method to map the band diagrams, or equipotential contours (EPCs), of any layered plasmonic metamaterial using a general expression for the Poynting vector in a lossy layered medium of finite extent under plane-wave illumination. Unlike conventional methods to get band diagrams by solving the Helmholtz equation using the Floquet-Bloch theorem (an approach restricted to infinite, periodic, lossless media), our method adopts a bottom-up philosophy based on spatial-frequency decomposition of the electric and magnetic fields (an approach applicable to finite, lossy media). Equipotential contours are used to visualize phase and group velocities in a wide range of layered plasmonic systems, including the basic building block of a thin metallic layer and more complex multi-layers with unique optical properties such as negative phase velocity, super-resolution imaging, canalization, and far-field imaging. We show that a thin metallic layer can mimic a left-handed electromagnetic response at the surface plasmon resonance and that stacks of metal and dielectric layers can do the same provided that the dielectric layer is sufficiently thin. We also use EPCs to estimate resolution limits of both Pendry's silver slab lens and the Veselago lens and show that the image location and lateral image resolution of metal-dielectric layered flat lenses can be described (and tailored) by the concavity and spectral reach of the dominant band in their EPCs. Homogenization methods for describing the effective optical properties of various layered systems are validated by the extent to which they accurately mimic features in their EPCs.

Al Shakhs, Mohammed H.; Ott, Peter; Chau, Kenneth J.

2014-11-01

250

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

251

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

252

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

253

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

254

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

255

Onsite response to the accident at Chernobyl (accident management)  

Microsoft Academic Search

In summarizing the information provided in the USSR report on plant stabilization shortly after the accident at Chernobyl and on the early response measures, the following three main stages can be identified: (1) the building fire-fighting actions and measures (techniques) undertaken and their effectiveness in controlling and finally extinguishing the fire; (2) the short-term stabilization of the plant immediately following

M. W. Jankowski; D. A. Powers; T. S. Kress

2009-01-01

256

Traffic accidents on a single-lane road with multi-slowdown sections  

NASA Astrophysics Data System (ADS)

In this paper, an extended cellular automaton model is proposed to simulate the complex characteristics of traffic flow and the probability of the occurrence of traffic accidents by considering the modified conditions for determining whether traffic accidents happen and the effect of multi-slowdown sections on a highway. The simulation results show that the multi-slowdown sections can lead to multiphase coexistences (i.e. free flow phase, congestion phase and saturation phase) in traffic system. The fundamental diagram shows that the number of slowdown section does not influence the mean velocity and the mean flow under the periodic boundary condition, but the existence of slowdown sections can effectively reduce the occurrence of traffic accident. In particular, it is found that the probability of car accidents to occur is the largest at the joint of the normal-speed section and slowdown section, and the underlying mechanism is analyzed. In addition, to design the appropriate limited speed and reduce the differences between the normal speed and limited speed will alleviate traffic congestion and reduce the occurrence of traffic accidents obviously.

Li, Xingli; Kuang, Hua; Fan, Yanhong; Zhang, Guoxin

2014-02-01

257

Socioeconomic consequences of nuclear reactor accidents  

SciTech Connect

This report identifies and characterizes the off-site socioeconomic consequences that would likely result from a severe radiological accident at a nuclear power plant. The types of impacts that are addressed include economic impacts, health impacts, social/psychological impacts and institutional impacts. These impacts are identified for each of several phases of a reactor accident - from the warning phase through the post-resettlement phase. The relative importance of the impact during each accident phase and the degree to which the impact can be predicted are indicated. The report also examines the methods that are currently used for assessing nuclear reactor accidents, including development of accident scenarios and the estimating of socioeconomic accident consequences with various models. Finally, a critical evaluation is made regarding the use of impact analyses in estimating the contribution of socioeconomic consequences to nuclear accident reactor accident risk. 116 references, 7 figures, 15 tables.

Tawil, J.J.; Callaway, J.W.; Coles, B.L.; Cronin, F.J.; Currie, J.W.; Imhoff, K.L.; Lewis, P.M.; Nesse, R.J.; Strenge, D.L.

1984-06-01

258

Analysis of accidents during flashing operations  

E-print Network

. In this thesis, the relative impacts of flashing signal operation versus regular signal operation were evaluated in several cities and towns in the State of Texas. Analysis were conducted to determine whether an increase in accidents and accident severity...

Obermeyer, Michael Edward

2012-06-07

259

EDMS 894435 INTERNAL ACCIDENT REPORT  

E-print Network

.McDonald/Princeton University-USA A. Fabich AB/ATB MERIT Exp. Spokespersons Subject: ACCIDENT FIRE POLLUTION "NEAR MISS immediately after the occurrence. 3 Material damage or pollution Total volume of mercury spillage was approximately 200 ml. Of that volume, approximately 50ml made it to the retention plastic, and a smaller

McDonald, Kirk

260

Multidisciplinary perspective on accident investigation  

Microsoft Academic Search

The increasing complexity of many computer-controlled application processes is placing increasing demands on the investigation of adverse events. At the same time, there is a growing realisation that accident investigators must consider a wider range of contributory and contextual factors that help to shape human behaviour in the causes of safety-related incidents. A range of techniques have been developed to

S. Basnyata

261

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

262

Accident Procedure Outline the procedures for accidents involving University of Michigan (U-M) vehicles.  

E-print Network

Accident Procedure Objective Outline the procedures for accidents involving University of Michigan. An accident is defined as any incident that causes damage to people or property. 2. In the event of an accident, secure the occupants and vehicle to prevent further incident. 3. Contact the local police agency

Kirschner, Denise

263

No Silver Bullet Essence and Accidents  

E-print Network

No Silver Bullet Essence and Accidents of Software Engineering TR86-020 September 1986 Frederick P. #12;No Silver Bullet Essence and Accidents of Software Engineering September, 1986 Doc. 860905 fpb TR Hill, North Carolina 27514 #12;NO SILVER BULLET - ESSENCE AND ACCIDENTS OF SOFTWARE ENGINEERING

North Carolina at Chapel Hill, University of

264

Dynamic Multitasking: Accidents Lead to Nonlinear Contracts  

E-print Network

Dynamic Multitasking: Accidents Lead to Nonlinear Contracts Agostino Capponi Department of Applied allocates his resources on two tasks of different types: effort and accident pre- vention. We explicitly. In contrast to the linear incentive scheme for effort, accident prevention leads to a sublinear punish- ment

Frei, Christoph

265

ASSESSING CAUSAL FACTORS IN INDIVIDUAL ROAD ACCIDENTS  

E-print Network

ASSESSING CAUSAL FACTORS IN INDIVIDUAL ROAD ACCIDENTS: COLLECTIVE RESPONSIBILITY IN FREEWAY REAR accident report: Happened on I-94 in downtown Minneapolis Happened during the afternoon peak period Vehicle" is a "condition or event" such that "had the condition or event been prevented...the accident would not occur

Minnesota, University of

266

MELCOR accident analysis for ARIES-ACT  

E-print Network

MELCOR accident analysis for ARIES-ACT Paul Humrickhouse Brad Merrill INL Fusion Safety Program · Ultimate decay heat removal in an accident is removed via natural circulation in the water loop, which runs Flow Flow #12;Fusion Safety Program · MELCOR is a code originally designed to model severe accident

California at San Diego, University of

267

48 CFR 836.513 - Accident prevention.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Accident prevention. 836.513 Section 836...CONTRACTS Contract Clauses 836.513 Accident prevention. The contracting officer must insert the clause at 852.236-87, Accident Prevention, in solicitations and...

2012-10-01

268

48 CFR 836.513 - Accident prevention.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Accident prevention. 836.513 Section 836...CONTRACTS Contract Clauses 836.513 Accident prevention. The contracting officer must insert the clause at 852.236-87, Accident Prevention, in solicitations and...

2011-10-01

269

ASSESSMENT OF TWO ACCIDENTS INVOLVING SAFETY DEVICES  

E-print Network

98-14 ASSESSMENT OF TWO ACCIDENTS INVOLVING SAFETY DEVICES J.F. Lechaudel. S. Bauchet INERIS Verneuil-en-Halatte, France. ABSTRACT This paper mainly aims at describing and analysing two accidents : an ammonia leakage and an explosion in a chemical unit. These accidents are in connection with safety

Paris-Sud XI, Université de

270

Aviation accident aetiology: catastrophe theory perspective  

Microsoft Academic Search

Human error is often cited as a major contributing factor or cause of incidents and accidents. Incident surveys in aviation have attributed 70 per cent of incidents to crew error. Although a large proportion of the accidents can be attributed to human error, Reason proposes a view that many accidents are catalyzed by persons not present at the time of

A. J. Masys

2004-01-01

271

A multiple discriminant analysis of vessel accidents  

Microsoft Academic Search

A large sample of 936 vessel accident cases occurring between 1979 and 1987 on the lower Mississippi River were cluster analyzed to generate four groups relatively unique in their respective attribute values. The attributes used to cluster the accidents included participation in the U.S. Coast Guard's New Orleans Vessel Traffic Service (NOLA-VTS), type of accident, river stage, traffic level, system

Louis A. Le Blanc; Conway T. Rucks

1996-01-01

272

Dynamic analysis of the Chernobyl accident  

Microsoft Academic Search

On April 26, 1986, the worst accident in the nuclear industry occurred at the Chernobyl Unit 4 reactor in the USSR. Initially, many causes were postulated for the accident; ultimately, a reactivity transient was identified as the driver for the power buildup leading to the core disruptive event. After the accident, the Hanford N-Reactor was put under close scrutiny to

H. Toffer; R. W. Twitchell

1987-01-01

273

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

274

The radiological impact of the Chernobyl accident  

Microsoft Academic Search

The purpose of this paper is to summarize the international assessments of the radiological impact of the Chernobyl accident. The Chernobyl accident was a technological disaster that went beyond the most pessimistic scenarios of nuclear engineers. It was more sever than a maximum credible accident to which nuclear engineers referred before it happened. In spite of its severity, the consequences

L. V. Konstantinov; A. J. Gonzalez

1988-01-01

275

The Chernobyl Accident and its Consequences  

Microsoft Academic Search

The accident at the Chernobyl nuclear power plant was the worst industrial accident of the last century that involved radiation. The unprecedented release of multiple different radioisotopes led to radioactive contamination of large areas surrounding the accident site. The exposure of the residents of these areas was varied and therefore the consequences for health and radioecology could not be reliably

V. Saenko; V. Ivanov; A. Tsyb; T. Bogdanova; M. Tronko; Yu. Demidchik; S. Yamashita

2011-01-01

276

48 CFR 836.513 - Accident prevention.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Accident prevention. 836.513 Section 836...CONTRACTS Contract Clauses 836.513 Accident prevention. The contracting officer must insert the clause at 852.236-87, Accident Prevention, in solicitations and...

2010-10-01

277

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

278

Electric field phase diagram of thiourea determined by optical birefringence  

E-print Network

L-123 Electric field phase diagram of thiourea determined by optical birefringence J. P. Jamet de pre- mier ordre. Abstract. 2014 The phase diagram of thiourea : SC(ND2)2 in the (E, T) plane has, Classification Physics Abstracts 77.80B 1. Introduction. - Thiourea (SC(ND2)2) has been the subject of many

Paris-Sud XI, Université de

279

Segmentation of Page Images Using the Area Voronoi Diagram  

Microsoft Academic Search

This paper presents a method of page segmentation based on the approximated area Voronoi diagram. The characteristics of the proposed method are as follows: (1) The Voronoi diagram enables us to obtain the candidates of boundaries of document components from page images with non-Manhattan layout and a skew. (2) The candidates are utilized to estimate the intercharacter and interline gaps

Koichi Kise; Akinori Sato; Motoi Iwata

1998-01-01

280

Voronoi diagrams of set-theoretic solid models  

Microsoft Academic Search

The definition of a Voronoi diagram is extended to arbitrary set-theoretic solid models. A method for approximating such diagrams using recursive subdivision is described. The method relies on octrees, which have been used for computing the distances between whole solid models. Two- and three-dimensional images generated using the algorithm are presented

David Lavender; A. Bowyer; J. Davenport; A. Wallis; J. Woodwark

1992-01-01

281

The Pathway Tools cellular overview diagram and Omics Viewer  

Microsoft Academic Search

The Pathway Tools cellular overview diagram is a visual representation of the biochemical network of an organism. The overview is automatically created from a Pathway\\/Genome Database descri- bing that organism. The cellular overview includes metabolic, transport and signaling pathways, and other membrane and periplasmic proteins. Pathway Tools supports interrogation and exploration of cellular biochemical networks through the overview diagram. Furthermore,

Suzanne M. Paley; Peter D. Karp

2006-01-01

282

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

283

Adding Value to Force Diagrams: Representing Relative Force Magnitudes  

ERIC Educational Resources Information Center

Nearly all physics instructors recognize the instructional value of force diagrams, and this journal has published several collections of exercises to improve student skill in this area. Yet some instructors worry that too few students perceive the conceptual and problem-solving utility of force diagrams, and over recent years a rich variety of…

Wendel, Paul

2011-01-01

284

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

285

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

286

49 CFR Appendix B to Part 230 - Diagrams and Drawings  

Code of Federal Regulations, 2010 CFR

... 4 2010-10-01 2010-10-01 false Diagrams and Drawings B Appendix B to Part 230 Transportation Other Regulations... Pt. 230, App. B Appendix B to Part 230—Diagrams and Drawings ER17No99.015 ER17No99.016 ER17No99.017...

2010-10-01

287

Diversions: Spatial Thinking Tasks--Cube Diagrams and Drawings  

ERIC Educational Resources Information Center

This article illustrates spatial thinking tasks through cube diagrams and drawings. The author talks about the pentacube diagram that is based on the principle that a vertical cube-edge is shown "vertically". The author describes how to extend isometric drawing to include triangular wedges that are made by slicing single cubes, bi-cubes,…

Gough, John

2009-01-01

288

Discrete-time random walks on diagrams (graphs) with cycles.  

PubMed

After a review of the diagram method for continuous-time random walks on graphs with cycles, the method is extended to discrete-time random walks. The basic theorems carry over formally from continuous time to discrete time. Three problems in tennis probabilities are used to illustrate random walks on discrete-time diagrams with cycles. PMID:3041408

Hill, T L

1988-08-01

289

CD2Alloy: Class Diagrams Analysis Using Alloy Revisited  

E-print Network

CD2Alloy: Class Diagrams Analysis Using Alloy Revisited Shahar Maoz , Jan Oliver Ringert present CD2Alloy, a novel, powerful translation of UML class diagrams (CDs) to Alloy. Unlike existingAlloy uses a deeper embedding strategy. Rather than mapping each CD construct to a semantically

Maoz, Shahar

290

Phase Diagram and Scattering Intensity of Binary Amphiphilic Systems  

E-print Network

Phase Diagram and Scattering Intensity of Binary Amphiphilic Systems G. Gompper and Ulrich S parameter, which describe the con- centration and orientation of the amphiphile, respectively, is used to study the phase diagram and the scattering intensity of binary amphiphilic systems. With increasing

Schwarz, Ulrich

291

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

292

The Equivalence of Reliability Diagrams and Fault-Tree Analysis  

Microsoft Academic Search

Many practicing engineers model their systems using reliability diagrams, while others use fault-tree analysis. The theoretical equivalence of the two techniques is described. System reliability can be expressed in two ways: probability of success and probability of failure approach, in terms of the tie-sets (forward paths) of a reliability diagram. Similarly, one can write two other expressions in terms of

Martin L. Shooman

1970-01-01

293

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

294

Authoring Diagram-Based CBA with CourseMarker  

ERIC Educational Resources Information Center

The CourseMarker system has been used to assess free-response computer based assessment (CBA) exercises since 1998. The aim of the studies reported here was to evaluate the feasibility and usefulness of developing and deploying diagram-based exercises using DATsys, an authoring environment for diagram-based CBA, together with CourseMarker.…

Higgins, Colin A.; Bligh, Brett; Symeonidis, Pavlos; Tsintsifas, Athanasios

2009-01-01

295

Heuristic Diagrams as a Tool to Teach History of Science  

Microsoft Academic Search

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

José A. Chamizo

2011-01-01

296

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

297

DYNAMIC BIFURCATION DIAGRAMS FOR SOME MODELS IN ECONOMICS AND BIOLOGY  

Microsoft Academic Search

A method to determine the static bifurcation diagram (sbd) and dynamical bifurcation diagram (dbd) is proposed and the results for a few concrete problems are shown. 1. Historical premises For a long time, we were working in hydrodynamic stability theory (hsth) (1), just the period during which this field was quickly moving from an analytical towards a geometric and topological

Adelina Georgescu

298

Diagram This Headline in One Minute, if You Can  

ERIC Educational Resources Information Center

Say "sentence diagramming" to people of a certain age, and one gets different reactions. Say it to most college students, and one gets a blank look. But not from the 24 students in Lucy Ferriss's "Constructing Thought," a half-credit course in the English department at Trinity College. They know how to diagram a sentence--and they are passionate…

Landecker, Heidi

2009-01-01

299

Particle-hole ring diagrams for fermions in two dimensions  

NASA Astrophysics Data System (ADS)

The set of particle-hole ring diagrams for a many-fermion system in two dimensions is studied. The complex-valued polarization function is derived in detail and shown to be expressible in terms of square-root functions. For a contact-interaction the perturbative contributions to the energy per particle ?(kf) are calculated in a closed analytical form from third up to twelfth order. The resummation of the particle-hole ring diagrams to all orders is studied and a pronounced dependence on the dimensionless coupling parameter ? is found. There is a substantial difference between the complete ring-sum with all exchange-type diagrams included and the standard resummation of the leading n-ring diagrams only. The spin factor Sn(g) associated to the nth order ring diagrams is derived for arbitrary spin-degeneracy g.

Kaiser, N.

2014-11-01

300

ANN queries: covering Voronoi diagram with hyperboxes  

E-print Network

Given a set $S$ of $n$ points in $d$-dimensional Euclidean metric space $X$ and a small positive real number $\\epsilon$, we present an algorithm to preprocess $S$ and answer queries that require finding a set $S' \\subseteq S$ of $\\epsilon$-approximate nearest neighbors (ANNs) to a given query point $q \\in X$. The following are the characteristics of points belonging to set $S'$: - $\\forall s \\in S'$, $\\exists$ a point $p \\in X$ such that $|pq| \\le \\epsilon$ and the nearest neighbor of $p$ is $s$, and - $\\exists$ a $s' \\in S'$ such that $s'$ is a nearest neighbor of $q$. During the preprocessing phase, from the Voronoi diagram of $S$ we construct a set of box trees of size $O(4^d\\frac{V}{\\delta}(\\frac{\\pi}{\\epsilon})^{d-1})$ which facilitate in querying ANNs of any input query point in $O(\\frac{1}{d}lg \\frac{V}{\\delta} + (\\frac{\\pi}{\\epsilon})^{d-1})$ time. Here $\\delta$ equals to $(\\frac{\\epsilon}{2\\sqrt{d}})^d$, and $V$ is the volume of a large bounding box that contains all the points of set $S$. The averag...

Inkulu, Rajasekhar

2011-01-01

301

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

302

Microstructure and phase diagrams of polymer gels  

NASA Astrophysics Data System (ADS)

Recently we developed [Panyukov and Rabin, Macromolecules 29 (1996) 7960] a phenomenological theory of randomly cross-linked polymer networks, based on the separation of solid-like and liquid-like degrees of freedom and taking into account the frozen inhomogeneity of network structure. We calculated the scattering spectra of weakly charged, randomly cross-linked polymer gels in good, poor and in ? solvents [Panyukov and Rabin, Macromolecules 29 (1996) 8530; Rabin and Panyukov, Macromolecules 30 (1996) 301]. For some values of the thermodynamic parameters, the competition between poor solubility, electrostatics and network elasticity leads to the divergence of the structure factor at a wave vector q ?, signaling the onset of microphase separation in the gel. Depending on the choice of thermodynamic parameters, the characteristic wavelength 1/q ? varies from microscopic to macroscopic length scales. We have shown that the presence of long range elastic interactions in the network affects the phase diagrams of polymer gels in poor solvent. Weakly charged gels deswell continuously upon decreasing the quality of solvent. At intermediate degrees of ionization the gel undergoes a first order volume transition between two homogeneous states, which takes place at the spinodal. Strong hysteresis is predicted for the swelling and the deswelling transitions in this regime. Further increase of the charge on the gel leads to the formation of an anisotropically deformed phase on the surface of the isotropic bulk phase.

Panyukov, Sergei; Rabin, Yitzhak

303

Effects of Three Diagram Instruction Methods on Transfer of Diagram Comprehension Skills: The Critical Role of Inference While Learning  

ERIC Educational Resources Information Center

Can students be taught to better comprehend the diagrams in their textbooks? Can such teaching transfer to uninstructed diagrams in the same domain or even in a new domain? What methods work best for these goals? Building on previous research showing positive results compared to control groups in both laboratory studies and short-term…

Cromley, Jennifer G.; Bergey, Bradley W.; Fitzhugh, Shannon; Newcombe, Nora; Wills, Theodore W.; Shipley, Thomas F.; Tanaka, Jacqueline C.

2013-01-01

304

The Concept of Accident Proneness: A Review  

PubMed Central

The term accident proneness was coined by psychological research workers in 1926. Since then its concept—that certain individuals are always more likely than others to sustain accidents, even though exposed to equal risk—has been questioned but seldom seriously challenged. This article describes much of the work and theory on which this concept is based, details the difficulties encountered in obtaining valid information and the interpretative errors that can arise from the examination of imperfect data, and explains why accident proneness became so readily accepted as an explanation of the facts. A recent hypothesis of accident causation, namely that a person's accident liability may vary from time to time, is outlined, and the respective abilities of this and of accident proneness to accord with data from the more reliable literature are examined. The authors conclude that the hypothesis of individual variation in liability is more realistic and in better agreement with the data than is accident proneness. PMID:14106130

Froggatt, Peter; Smiley, James A.

1964-01-01

305

Expert-control accident mitigation  

SciTech Connect

An effective accident mitigation system (AMS) combines technologies from several different areas. The end product allows the operator to select a rational course of action in a limited time. The system is comparable to having process, cost and maintenance engineers observing the process 24 hours a day. By implementing an AMS, operators will be able to reduce accidents and plant downtime, both in frequency and severity. This will also lessen the liability that a company has to investors, workers and the public. An automated AMS can be used as an operating aid when quick decisions are needed. It accomplishes this by presenting alternatives and diagnostics to the operator, quickly. Each solution is weighted by probabilistic and economic factors. In addition, the system determines the time that the operator must react to a situation. The AMS combines artificial intelligence, risk assessment and dynamic simulation into real-time control. An overview of the system is presented in this article.

Stacklin, C.A. (Fluor Daniel, Inc., Irvine, CA (US))

1989-10-01

306

Magnetic phase diagram of F2PNNNO  

NASA Astrophysics Data System (ADS)

2-[2',6',-difluoro-4'-(N-tert-butyl-N-oxyamino)phenyl]-4,4,5,5-tetramethyl-4,5- dihydro-1H-imidazol-1-oxyl 3-oxide, F2PNNNO for short, is an organic molecule containing two unpaired electrons. Residing in the N-tert-butyl nitroxide and nitronyl nitroxide groups, the two S=1/2 spins of these electrons are ferromagnetically coupled with an exchange constant of 407 K. In a crystal, two neighboring F2PNNNO molecules form a pair in which the nitronyl-nitroxide spins are coupled antiferromagnetically with an exchange constant of 67 K. The magnetism of F2PNNNO is that of the spin tetramers of these molecular pairs, which in turn are antiferromagnetically coupled with an exchange constant of 7.4 K [1]. Specific-heat and magnetocaloric-effect measurements reveal a highly symmetric boundary of the ordered phase in the phase diagram, with a lower critical field of Hc1=9.46 T and an upper critical field of Hc2=15.37 T. The ordering temperature Tc obeys a power law Tc ˜(H-Hc1)^? near Hc1, with the exponent ? approaching 2/3 in the low-temperature limit, indicative of a Bose-Einstein condensation (BEC) of |S, Sz>=|1,1> tetramers. Near the upper critical field Hc2, where one expects a BEC of singlet |0,0> tetramers in the ``vacuum'' comprising |1,1> tetramers, the corresponding power-law exponent remains around 0.4. Remarkably, the temperature dependence of the specific heat indicates that the magnon dispersion is independent of magnetic field between the two critical fields. This work is in collaboration with H. Tsujii, B. Andraka, Y. Hosokoshi, and K. Inoue. [1] Y. Hosokoshi et al., Phys. Rev. B 60, 12924 (1999).

Takano, Yasu

2007-03-01

307

Energetic Studies and Phase Diagram of Thioxanthene  

NASA Astrophysics Data System (ADS)

The molecular stability of thioxanthene, a key species from which very important compounds with industrial relevance are derived, has been studied by a combination of several experimental techniques and computational approaches. The standard (p° = 0.1 MPa) molar enthalpy of formation of crystalline thioxanthene (117.4 ± 4.1 kJ·mol-1) was determined from the experimental standard molar energy of combustion, in oxygen, measured by rotating-bomb combustion calorimetry at T = 298.15 K. The enthalpy of sublimation was determined by a direct method, using the vacuum drop microcalorimetric technique, and also by an indirect method, using a static apparatus, where the vapor pressures at different temperatures were measured. The latter technique was used for both crystalline and undercooled liquid samples, and the phase diagram of thioxanthene near the triple point was obtained (triple point coordinates T = 402.71 K and p = 144.7 Pa). From the two methods, a mean value for the standard (p° = 0.1 MPa) molar enthalpy of sublimation, at T = 298.15 K (101.3 ± 0.8 kJ·mol-1), was derived. From the latter value and from the enthalpy of formation of the solid, the standard (p° = 0.1 MPa) enthalpy of formation of gaseous thioxanthene was calculated as 218.7 ± 4.2 kJ·mol-1. Standard ab initio molecular orbital calculations were performed using the G3(MP2)//B3LYP composite procedure and several homodesmotic reactions in order to derive the standard molar enthalpy of formation of thioxanthene. The ab initio results are in excellent agreement with the experimental data.

Freitas, Vera L. S.; Monte, Manuel J. S.; Santos, Luís M. N. B. F.; Gomes, José R. B.; Ribeiro da Silva, Maria D. M. C.

2009-10-01

308

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

309

The High-z Quasar Hubble Diagram  

E-print Network

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 R_h=ct Universe and LCDM 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 R_h=ct Universe is more likely than LCDM to be correct, by a ratio of about 85% to 15%.

Fulvio Melia

2013-12-20

310

Diagrams of States in Quantum Information: an Illustrative Tutorial  

E-print Network

We present "Diagrams of States", a way to graphically represent and analyze how quantum information is elaborated during the execution of quantum circuits. This introductory tutorial illustrates the basics, providing useful examples of quantum computations: elementary operations in single-qubit, two-qubit and three-qubit systems, immersions of gates on higher dimensional spaces, generation of single and multi-qubit states, procedures to synthesize unitary, controlled and diagonal matrices. To perform the analysis of quantum processes, we directly derive diagrams of states from physical implementations of quantum circuits associated to the processes. Complete diagrams are then rearranged into simplified diagrams, to visualize the overall effects of computations. Conversely, diagrams of states help to conceive new quantum algorithms, by schematically describing desired manipulations of quantum information with intuitive diagrams and then by guessing the equivalent complete diagrams, from which the corresponding quantum circuit is obtained effortlessly. Related examples and analysis of complex algorithms will be provided in future works, for whose comprehension this first tutorial offers the necessary introduction.

Sara Felloni; Alberto Leporati; Giuliano Strini

2009-04-17

311

Commercial driver accident research survey  

Microsoft Academic Search

BackgroundRoad traffic incidents (RTIs) are on the rise in Pakistan with a disproportionately higher number of accidents involving commercial vehicles.ObjectivesTo estimate the prevalence of driver related causes potentially contributing to the occurrence of RTIs involving commercial vehicles in Pakistan, including driving behaviours, fatigue, sleep inadequacy, substance abuse and other risky practices while driving.MethodsA cross sectional survey in Rawalpindi using Time

M U Mir; J Razzak; K Ahmad

2010-01-01

312

Accident analysis and DOE criteria  

SciTech Connect

In analyzing the radiological consequences of major accidents at DOE facilities one finds that many facilities fall so far below the limits of DOE Order 6430 that compliance is easily demonstrated by simple analysis. For those cases where the amount of radioactive material and the dispersive energy available are enough for accident consequences to approach the limits, the models and assumptions used become critical. In some cases the models themselves are the difference between meeting the criteria or not meeting them. Further, in one case, we found that not only did the selection of models determine compliance but the selection of applicable criteria from different chapters of Order 6430 also made the difference. DOE has recognized the problem of different criteria in different chapters applying to one facility, and has proceeded to make changes for the sake of consistency. We have proposed to outline the specific steps needed in an accident analysis and suggest appropriate models, parameters, and assumptions. As a result we feed DOE siting and design criteria will be more fairly and consistently applied.

Graf, J.M.; Elder, J.C.

1982-01-01

313

Use of bifurcation diagrams as fingerprints of chemical mechanisms  

SciTech Connect

Various chemical reagents were fed continuously into a continuously stirred tank reactor to perturb the Belousov-Zhabotinskii system. The resulting bifurcation diagrams each contain multiple curves separating regions with different types of dynamical behavior. These very complex diagrams can be used as fingerprints of the perturbing chemical mechanism. Essentially the same bifurcation structures were observed under the addition of formaldehyde and sodium bromite, indicating the same mechanism. The effect of bromomalonic and hypobromous acids was also found to be nearly identical; the slight differences between their fingerprints is explained by the effect of bromine, which contaminates the HOBr. Finally, the effect of added bromide is shown in another bifurcation diagram.

Noszticzius, Z.; McCormick, W.D.; Swinney, H.L. (Univ. of Texas, Austin (USA))

1989-04-06

314

Phase diagrams of single-domain ferroelectric-dielectric superlattices  

NASA Astrophysics Data System (ADS)

Using the thermodynamic theory, the authors developed misfit strain-temperature phase diagrams of single-domain ferroelectric-dielectric superlattices grown on cubic substrates. Owing to internal electric fields appearing in such multilayers, the superlattice diagrams are expected to be very different from phase maps of homogeneous ferroelectric films. The calculations show, however, that this electrostatic effect does not change relative positions of phase transition lines. It only shifts the diagram as a whole along the line separating stability ranges of paraelectric phase and in-plane polarization state. The magnitude of this shift is governed by the capacitance of dielectric layer and the thickness of ferroelectric one.

Urtiev, F. A.; Kukhar, V. G.; Pertsev, N. A.

2007-06-01

315

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

316

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

317

To use or not to use diagrams: The effect of drawing a diagram in solving introductory physics problems  

NSDL National Science Digital Library

Drawing appropriate diagrams is a useful problem solving heuristic that can transform a given problem into a representation that is easier to exploit for solving it. A major focus while helping introductory physics students learn problem solving is to help them appreciate that drawing diagrams facilitates problem solution. We conducted an investigation in which 111 students in an algebra-based introductory physics course were subjected to two different interventions during recitation quizzes throughout the semester. They were either (1) asked to solve problems in which the diagrams were drawn for them or (2) explicitly told to draw a diagram. A comparison group was not given any instruction regarding diagrams. We developed a rubric to score the problem-solving performance of students in different intervention groups. We investigated two problems involving electric field and electric force and found that students who draw expert-like diagrams are more successful problem solvers and that a higher level of detail in a studentâs diagram corresponds to a better score.

Maries, Alexandru; Singh, Chandralekha

2013-07-17

318

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

319

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...

320

Verification of Arithmetic Functions with Binary Moment Diagrams  

E-print Network

, either expressed or implied, of Wright Laboratory or the United States Government. #12; Keywords: Formal Diagrams (BDDs) represent Boolean functions. Within the class of linear functions, we can embed arbitary

Bryant, Randal E.

321

30 CFR 256.8 - Leasing maps and diagrams.  

Code of Federal Regulations, 2010 CFR

...MANAGEMENT SERVICE, DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER CONTINENTAL SHELF Outer Continental Shelf Oil, Gas, and Sulphur Management, General § 256.8 Leasing maps and diagrams....

2010-07-01

322

Using ordered partial decision diagrams for manufacture test generation  

E-print Network

Because of limited tester time and memory, a primary goal of digital circuit manufacture test generation is to create compact test sets. Test generation programs that use Ordered Binary Decision Diagrams (OBDDs) as their primary functional...

Cobb, Bradley Douglas

2004-09-30

323

Architecture flow diagrams under teamwork{reg_sign}  

SciTech Connect

The Teamwork CASE tool allows Data Flow Diagrams (DFDs) to be maintained for structured analysis. Fermilab has extended teamwork under UNIX{trademark} to permit Hatley and Pirbhai Architecture Flow Diagrams (AFDs) to be associated with DFDs and subsequently maintained. This extension, called TWKAFD, allows a user to open an AFD, graphically edit it, and replace it into a TWKAFD maintained library. Other aspects of Hatley and Pirbhai`s methodology are supported. This paper presents a quick tutorial on Architecture Diagrams. It then describes the user`s view of TWKAFD, the experience incorporating it into teamwork, and the successes with using the Architecture Diagram methodology along with the shortcomings of using the teamwork/TWKAFD tool. 8 refs.

Nicinski, T.

1992-02-01

324

Flame Deflector Section, Elevation, Water Supply Flow Diagram, Exploded ...  

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

Flame Deflector - Section, Elevation, Water Supply Flow Diagram, Exploded Deflector Manifolds, and Interior Perspective - Marshall Space Flight Center, F-1 Engine Static Test Stand, On Route 565 between Huntsville and Decatur , Huntsville, Madison County, AL

325

The topological characteristics of liquid-vapor phase diagrams  

Microsoft Academic Search

The existing forms of the rule of azeotropy are reviewed and a new form applicable to distillation (reactive distillation)\\u000a diagrams and their fragments, which are simplicial complexes of arbitrary dimensions, is presented.

Yu. A. Pisarenko

2008-01-01

326

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2010 CFR

...Other Regulations Relating to Transportation (Continued) SURFACE TRANSPORTATION BOARD, DEPARTMENT OF TRANSPORTATION RULES...system diagram map shall also identify, and shall be drawn to a scale sufficient to depict clearly, the location of: (1)...

2010-10-01

327

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

328

Fast computation of Generalized Voronoi Diagrams Using Graphics Hardware  

Microsoft Academic Search

We demonstrate a new approach for computing generalized 2D and 3D Voronoi diagrams using interpolation-based polygon rasterization hardware. We compute a discrete Voronoi diagram by rendering a three dimensional distance mesh for each Voronoi site. The polygonal mesh is a bounded-error approximation of a (possibly) non-linear function of the distance between a site and a 2D planar grid of sample

Kenneth E. Hoff III; Tim Culver; John Keyser; Dinesh Manocha; Ming C. Lin

2000-01-01

329

Voronoi diagrams and offset curves of curvilinear polygons  

Microsoft Academic Search

This paper studies the practical generation of Voronoi diagrams and offset curves of simply-connected planar areas bounded by straight lines and circular arcs. We present and analyze a wavefront-propagation algorithm for the generation of Voronoi diagrams and compare it experimentally to a tuned version of Lee's divide-and-conquer algorithm. Key performance parameters of these two algorithms are compared based on machine-generated

Martin Held

1998-01-01

330

Two-Dimensional Voronoi Diagrams in the L p Metric  

Microsoft Academic Search

The Voronoi diagram, also known as the Thiessen diagram, for a set of N points in the Cartesian plane in which the L,-metnc is the distance measure, where p is a real number between 1 and 0o inclusive, is defined, and an algorithm for constructing the dmgram m O(NlogN) tune is presented This algonthm uses the divide-and-conquer technique. Many proximity

D. T. Lee

1980-01-01

331

A Hubble diagram of distant type IA supernovae  

Microsoft Academic Search

We have constructed Hubble diagrams in B and V for 13 Type Ia supernovae (SNe Ia) found in the course of the Calan\\/Tololo survey covering an unprecedented range in redshift (0.01 less than Z less than 0.1). As opposed to other published Hubble diagrams, these are solely based on light curves obtained with CCDs, which have been carefully reduced in

Mario Hamuy; M. M. Phillips; Jose Maza; Nicholas B. Suntzeff; R. A. Schommer; R. Aviles

1995-01-01

332

Differential Reduction Techniques for the Evaluation of Feynman Diagrams  

E-print Network

Stable reduction methods will be important in the evaluation of high-order perturbative diagrams appearing in QCD and mixed QCD-electroweak radiative corrections at the LHC. Differential reduction techniques are useful for relating hypergeometric functions with shifted values of the parameters. We present a proposition relating the number of master integrals in the expansion of a Feynman diagram to the number of derivatives in a differential reduction.

S. A. Yost; V. V. Bytev; M. Yu. Kalmykov; B. A. Kniehl; B. F. L. Ward

2011-01-12

333

State diagram and water adsorption isotherm of raspberry ( Rubus idaeus)  

Microsoft Academic Search

Thermal transitions of freeze-dried raspberry powder (Rubus idaeus) were analyzed by using differential scanning calorimetry. Freeze-dried raspberry powders containing unfreezable and freezable water were examined to develop the state diagram of raspberry. The state diagram of freeze-dried raspberry powders included the glass line; glass transition temperature versus solids content, freezing curve; initial freezing point versus solids content; end point of

Roopesh M. Syamaladevi; Shyam S. Sablani; Juming Tang; Joseph Powers; Barry G. Swanson

2009-01-01

334

Higher-Dimensional Voronoi Diagrams in Linear Expected Time  

Microsoft Academic Search

A general method is presented for determining the mathematical expectation of the combinatorial complexity and other properties\\u000a of the Voronoi diagram ofn independent and identically distributed points. The method is applied to derive exact asymptotic bounds on the expected number\\u000a of vertices of the Voronoi diagram of points chosen from the uniform distribution on the interior of ad-dimensional ball; it

Rex A. Dwyer

1991-01-01

335

Heuristic Diagrams as a Tool to Teach History of Science  

Microsoft Academic Search

The graphic organizer called here heuristic diagram as an improvement of Gowin’s Vee heuristic is proposed as a tool to teach\\u000a history of science. Heuristic diagrams have the purpose of helping students (or teachers, or researchers) to understand their\\u000a own research considering that asks and problem-solving are central to scientific activity. The left side originally related\\u000a in Gowin’s Vee with

José A. Chamizo

336

State Diagram of Date Flesh Using Differential Scanning Calorimetry (DSC)  

Microsoft Academic Search

The state diagram of date flesh was developed by measuring its freezing points, glass transition temperatures, maximal-freeze-concentration condition ( and ), and solute melting points (or decomposition temperature) by Differential Scanning Calorimetry (DSC). The freezing curve and glass transition lines were developed using Clausius-Clapeyron equation by incorporating concept of unfrozen water, and Gordon-Taylor equation, respectively. The developed state diagram of

M. Shafiur Rahman

2004-01-01

337

CALCULATING ASTEROSEISMIC DIAGRAMS FOR SOLAR-LIKE OSCILLATIONS  

SciTech Connect

With the success of the Kepler and CoRoT missions, the number of stars with detected solar-like oscillations has increased by several orders of magnitude; for the first time we are able to perform large-scale ensemble asteroseismology of these stars. In preparation for this golden age of asteroseismology we have computed expected values of various asteroseismic observables from models of varying mass and metallicity. The relationships between these asteroseismic observables, such as the separations between mode frequencies, are able to significantly constrain estimates of the ages and masses of these stars. We investigate the scaling relation between the large frequency separation, {Delta}{nu}, and mean stellar density. Furthermore we present model evolutionary tracks for several asteroseismic diagrams. We have extended the so-called C-D diagram beyond the main sequence to the subgiants and the red giant branch. We also consider another asteroseismic diagram, the {epsilon} diagram, which is more sensitive to variations in stellar properties at the subgiant stages and can aid in determining the correct mode identification. The recent discovery of gravity-mode period spacings in red giants forms the basis for a third asteroseismic diagram. We compare the evolutionary model tracks in these asteroseismic diagrams with results from pre-Kepler studies of solar-like oscillations and early results from Kepler.

White, Timothy R.; Bedding, Timothy R.; Stello, Dennis; Huber, Daniel [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006 (Australia); Christensen-Dalsgaard, Jorgen; Kjeldsen, Hans, E-mail: t.white@physics.usyd.edu.au [Danish AsteroSeismology Centre (DASC), Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark)

2011-12-20

338

STUDY OF INTERSECTION ACCIDENTS BY MANEUVER TYPE  

Microsoft Academic Search

Studies dealing with the effect of road geometry on accidents by vehicle maneuvers have been reported, mostly for western countries and a few for Asia. However, no such studies have been reported for Singapore. Traffic accidents arising from head-to-side and head-to-rear maneuvers at four-legged signalized intersections in Singapore were investigated. Based on accident data at intersections in the southwestern part

Sudeshna Mitra; Hoong Chor Chin; Mohammed Quddus

2002-01-01

339

SRS's production reactor severe-accident issues  

Microsoft Academic Search

Severe accident behavior in Al-U metal-fueled production reactors is sufficiently different from commercial oxide-fueled reactors that an ongoing research and development (R and D) effort is needed to resolve issues specific to metal-fueled systems. The severe-accident program at the Savannah River Site (SRS) is based on light water reactor (LWR) technology when appropriate. A direct application of severe-accident phenomena technology

P. G. Ellison; M. L. Hyder; P. R. Monson; M. J. Ades

1991-01-01

340

Calculation notes that support accident scenario and consequence development for the subsurface leak remaining subsurface accident  

SciTech Connect

This document supports the development and presentation of the following accident scenario in the TWRS Final Safety Analysis Report: Subsurface Leak Remaining Subsurface. The calculations needed to quantify the risk associated with this accident scenario are included within.

Ryan, G.W., Westinghouse Hanford

1996-07-12

341

Calculation notes that support accident scenario and consequence development for the subsurface leak remaining subsurface accident  

SciTech Connect

This document supports the development and presentation of the following accident scenario in the TWRS Final Safety Analysis Report: Subsurface Leak Remaining Subsurface. The calculations needed to quantify the risk associated with this accident scenario are included within.

Ryan, G.W., Westinghouse Hanford

1996-09-19

342

HTGR severe accident sequence analysis  

SciTech Connect

Thermal-hydraulic, fission product transport, and atmospheric dispersion calculations are presented for hypothetical severe accident release paths at the Fort St. Vrain (FSV) high temperature gas cooled reactor (HTGR). Off-site radiation exposures are calculated for assumed release of 100% of the 24 hour post-shutdown core xenon and krypton inventory and 5.5% of the iodine inventory. The results show conditions under which dose avoidance measures would be desirable and demonstrate the importance of specific release characteristics such as effective release height. 7 tables.

Harrington, R.M.; Ball, S.J.; Kornegay, F.C.

1982-01-01

343

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

2014-09-01

344

Probabilistic analysis of air carrier accidents  

NASA Technical Reports Server (NTRS)

In order to estimate the potential risks due to carbon fibers (CF) released from aircraft accidents, it was necessary to quantify the probability of an accident or incident at a major hub airport. This probability was contingent upon various conditions surrounding the incident including the phase of operation, aircraft type, and the weather conditions. The type of accident predicted was categorized according to its location relative to the runway and the severity of damage sustained. The methodology utilized to estimate the probability of a specific type of accident is outlined and the various models that were developed in the course of this work are described.

1979-01-01

345

Aircraft Loss-of-Control Accident Analysis  

NASA Technical Reports Server (NTRS)

Loss of control remains one of the largest contributors to fatal aircraft accidents worldwide. Aircraft loss-of-control accidents are complex in that they can result from numerous causal and contributing factors acting alone or (more often) in combination. Hence, there is no single intervention strategy to prevent these accidents. To gain a better understanding into aircraft loss-of-control events and possible intervention strategies, this paper presents a detailed analysis of loss-of-control accident data (predominantly from Part 121), including worst case combinations of causal and contributing factors and their sequencing. Future potential risks are also considered.

Belcastro, Christine M.; Foster, John V.

2010-01-01

346

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

347

Safety Management of Traffic Accident Scene Based on System Dynamics  

Microsoft Academic Search

Traffic system is a dynamic complicated one which is constituted of some factors. Traffic accident will happen if these factors mismatch with each other. Safety level of traffic accident scene affects occurrence rate of secondary accident. In order to evaluate safety level of traffic accident scene, prevent from secondary accident happening and protect the policemen, crowds by the scene and

Wen-hui Zhang; Hong-guo Xu; Biao Wu; Sheng-qin Li

2008-01-01

348

Date of Accident: _____/_____/________ Day of Week: __________________ Hour: _____:______ AM / PM TIME VEHICLE ACCIDENT REPORT  

E-print Network

motor vehicle accidents involving State employees, vehicles, equipment or where highways could result in claim against State. For reports of non-motor vehicle accidents and occurrence that could result-Vehicle." THIS REPORT IS NOT a substitute for Motor Vehicle Department's required "Motor Vehicle Accident Report

Farritor, Shane

349

Injury and Illness Prevention Programs Investigation of Accidents, Injuries and Illnesses INVESTIGATION OF ACCIDENTS,  

E-print Network

Injury and Illness Prevention Programs Investigation of Accidents, Injuries and Illnesses 1 INVESTIGATION OF ACCIDENTS, INJURIES AND ILLNESSES AG TOOL 1 I. Purpose Investigations are conducted to find out the cause of accidents, injuries and illnesses, and to prevent similar events from happening in the future

Leistikow, Bruce N.

350

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

351

GESTION DES PRESQUE ACCIDENTS ET ACCIDENTS MAJEURS : PREMIER BILAN D'UNE ENQUETE SUR DES SITES SEVESO  

E-print Network

GESTION DES PRESQUE ACCIDENTS ET ACCIDENTS MAJEURS : PREMIER BILAN D'UNE ENQUETE SUR DES SITES sur la gestion des presque accidents. Les presque accidents sont associés à la thématique des précurseurs et des signaux faibles, ces signaux qui sont rendus évident seulement une fois que l'accident est

Boyer, Edmond

352

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

353

Perceived health change in the aftermath of a petrochemical accident: an examination of pre-accident, within-accident, and post-accident variables  

PubMed Central

Background Little research has been conducted on changes in perceived health after an industrial accident. Using data from an ongoing survey on stress and health in a petrochemical complex in Texas City, Texas, the associations of a petrochemical accident with perceived health changes were examined. Methods The mean changes in perceived mental and physical health across pre-accident, within-accident, and post-accident categories were compared. The association of these categorical variables with the change in perceived mental and physical health using multiple regression was also examined. Results Significant declines in both perceived mental and physical health were observed for the sample. Regression analyses showed that middle age, lower education level and reported damage in the neighbourhood were associated with decreases in perceived mental health. Lower education level, explosion impact, and distance from the explosion site were associated with decreases in perceived physical health. Conclusions These results indicate that both pre-accident and within-accident variables, such as education level and explosion impact, are associated with decreases in perceived physical and mental health. Even a modest event within the range of accidents and disasters was shown to be associated with negative health outcomes for a population-based sample. PMID:18192597

Peek, M K; Cutchin, M P; Freeman, D H; Perez, N A; Goodwin, J S

2013-01-01

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

Normal Accident at Three Mile Island.  

ERIC Educational Resources Information Center

Discusses some aspects of the accident at the Three Mile Island nuclear power plant. Explains a number of factors involved including the type of accident, warnings, design and equipment failure, operator error, and negative synergy. Presents alternatives to systems with catastrophic potential. (MK)

Perrow, Charles

1981-01-01

356

Accident hazards of nuclear power plants  

Microsoft Academic Search

Nuclear power plant safety questions are examined for both the concerned citizen and the nuclear reactor expert. The author describes the three major type of reactors being used and developed in the United States, including the Liquid Metal Fast Breeder, and the accident hazards they present. He explains the uncertainties in theoretical predictions about the potential and probability of accidents

Webb

1976-01-01

357

Nuclear power plant Severe Accident Research Plan  

Microsoft Academic Search

The Severe Accident Research Plan (SARP) will provide technical information necessary to support regulatory decisions in the severe accident area for existing or planned nuclear power plants, and covers research for the time period of January 1982 through January 1986. SARP will develop generic bases to determine how safe the plants are and where and how their level of safety

J. T. Larkins; M. A. Cunningham

1983-01-01

358

An Investigation of the Therac-25 Accidents  

E-print Network

in accidents. Some of the most widely cited software-related accidents in safety-critical systems involved the profile of those resistant to or uninformed of the principles of either system safety or software-of-the-art software-engineering procedures. Many companies building safety-critical software are not using proper

Yang, Junfeng

359

Cognitive failure analysis for aircraft accident investigation  

Microsoft Academic Search

The present studies were undertaken to investigate the applicability of an information processing approach to human failure in the aircraft cockpit. Using data obtained from official aircraft accident investigation reports, a database of accidents and incidents involving New Zealand civil aircraft between 1982 and 1991 was compiled. In the first study, reports were coded into one of three error stages

DAVID OHARE; MARK WIGGINS; RICHARD BATT; DIANNE MORRISON

1994-01-01

360

Consequence calculations for PPCS bounding accidents  

Microsoft Academic Search

A ‘worst case’ assessment of the radiologically significant environmental source term, based on bounding accident analysis of a single blanket cooling loop loss of cooling accident (LOCA), has been performed for Fusion Plant Models A and B of the Power Plant Conceptual Study (PPCS). This paper describes the calculations of ensuing material mobilisation, transport in the containment, release to the

W. E. Han

2005-01-01

361

Accident motivates scholarship April 3, 2012  

E-print Network

- 1 - Accident motivates scholarship recipient April 3, 2012 Scholarship recipient not deterred by accident, inspired to help others October 26, 2010, started out as just another day for Escalante High as a springboard to a career in exercise science and physical therapy. Leyba recently received a Senator Pete

362

49 CFR 229.17 - Accident reports.  

Code of Federal Regulations, 2011 CFR

...report shall state the nature of the accident, number of persons killed or seriously...location at which the locomotive or the affected parts may be inspected by the FRA...the part or parts affected by the accident shall be preserved intact by...

2011-10-01

363

Mine accident liabilities: a Pandora's box  

Microsoft Academic Search

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

Biddle

1985-01-01

364

49 CFR 229.17 - Accident reports.  

Code of Federal Regulations, 2010 CFR

...report shall state the nature of the accident, number of persons killed or seriously...location at which the locomotive or the affected parts may be inspected by the FRA...the part or parts affected by the accident shall be preserved intact by...

2010-10-01

365

The Bhopal accident and methyl isocyanate toxicity  

Microsoft Academic Search

The Bhopal accident, the world's worst industrial disaster, in which nearly 40 metric tons of methyl isocyanate (MIC) was released from the Union Carbide pesticide plant, occurred nearly 10 yr ago during the night of December 2 and 3, 1984. Over 3000 people residing in areas adjacent to the plant died of pulmonary edema within 3 d of the accident.

Daya R. Varma; Ian Guest

1993-01-01

366

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

367

Aircraft accidents.method of analysis  

NASA Technical Reports Server (NTRS)

This report is a revision of NACA-TR-357. It was prepared by the Committee on Aircraft Accidents. The purpose of this report is to provide a basis for the classification and comparison of aircraft accidents, both civil and military.

1937-01-01

368

Analysis of accidents during instrument approaches  

NASA Technical Reports Server (NTRS)

General aviation and air taxi approach phase accidents, which occurred during VFR and IFR, respectively over the last 25 years, were analyzed. The data suggest that there is a 204 percent 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.

Bennett, C. T.; Schwirzke, M.

1992-01-01

369

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

370

10 CFR 835.1304 - Nuclear accident dosimetry.  

Code of Federal Regulations, 2013 CFR

...2013-01-01 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)...

2013-01-01

371

10 CFR 835.1304 - Nuclear accident dosimetry.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 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)...

2010-01-01

372

10 CFR 835.1304 - Nuclear accident dosimetry.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 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)...

2012-01-01

373

10 CFR 835.1304 - Nuclear accident dosimetry.  

...2014-01-01 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)...

2014-01-01

374

10 CFR 835.1304 - Nuclear accident dosimetry.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 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)...

2011-01-01

375

43 CFR 15.13 - Report of accidents.  

Code of Federal Regulations, 2010 CFR

...accidents. 15.13 Section 15.13 Public Lands: Interior Office of the Secretary of the Interior KEY LARGO CORAL REEF PRESERVE § 15.13 Report of accidents. Accidents involving injury to life or property shall be reported as...

2010-10-01

376

43 CFR 15.13 - Report of accidents.  

Code of Federal Regulations, 2013 CFR

...accidents. 15.13 Section 15.13 Public Lands: Interior Office of the Secretary of the Interior KEY LARGO CORAL REEF PRESERVE § 15.13 Report of accidents. Accidents involving injury to life or property shall be reported as...

2013-10-01

377

43 CFR 15.13 - Report of accidents.  

Code of Federal Regulations, 2012 CFR

...accidents. 15.13 Section 15.13 Public Lands: Interior Office of the Secretary of the Interior KEY LARGO CORAL REEF PRESERVE § 15.13 Report of accidents. Accidents involving injury to life or property shall be reported as...

2012-10-01

378

43 CFR 15.13 - Report of accidents.  

Code of Federal Regulations, 2011 CFR

...accidents. 15.13 Section 15.13 Public Lands: Interior Office of the Secretary of the Interior KEY LARGO CORAL REEF PRESERVE § 15.13 Report of accidents. Accidents involving injury to life or property shall be reported as...

2011-10-01

379

49 CFR 225.11 - Reporting of accidents/incidents.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Reporting of accidents/incidents. 225.11 Section 225...DEPARTMENT OF TRANSPORTATION RAILROAD ACCIDENTS/INCIDENTS: REPORTS CLASSIFICATION...INVESTIGATIONS § 225.11 Reporting of accidents/incidents. (a) Each...

2012-10-01

380

49 CFR 195.52 - Immediate notice of certain accidents.  

Code of Federal Regulations, 2012 CFR

... false Immediate notice of certain accidents. 195.52 Section 195.52 Transportation...HAZARDOUS LIQUIDS BY PIPELINE Annual, Accident, and Safety-Related Condition Reporting...195.52 Immediate notice of certain accidents. (a) Notice...

2012-10-01

381

14 CFR 294.40 - Aircraft accident liability insurance requirements.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Aircraft accident liability insurance requirements. ...Requirements § 294.40 Aircraft accident liability insurance requirements. ...carrier has and maintains in effect aircraft accident liability coverage that meets...

2011-01-01

382

46 CFR 196.30-5 - Accidents to machinery.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Accidents to machinery. 196.30-5 Section...RESEARCH VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 196.30-5 Accidents to machinery. (a) In the event...

2011-10-01

383

46 CFR 326.4 - Reports of accidents and occurrences.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 false Reports of accidents and occurrences. 326.4 Section...AGREEMENTS WITH AGENTS § 326.4 Reports of accidents and occurrences. The Agent shall report every accident or occurrence of a P&I...

2011-10-01

384

46 CFR 97.30-5 - Accidents to machinery.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Accidents to machinery. 97.30-5 Section...MISCELLANEOUS VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 97.30-5 Accidents to machinery. (a) In the event...

2011-10-01

385

49 CFR 225.11 - Reporting of accidents/incidents.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Reporting of accidents/incidents. 225.11 Section 225...DEPARTMENT OF TRANSPORTATION RAILROAD ACCIDENTS/INCIDENTS: REPORTS CLASSIFICATION...INVESTIGATIONS § 225.11 Reporting of accidents/incidents. (a) Each...

2011-10-01

386

33 CFR 173.55 - Report of casualty or accident.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Report of casualty or accident. 173.55 Section 173.55 Navigation...BOATING SAFETY VESSEL NUMBERING AND CASUALTY AND ACCIDENT REPORTING Casualty and Accident Reporting § 173.55 Report of...

2011-07-01

387

14 CFR 415.41 - Accident investigation plan.  

Code of Federal Regulations, 2012 CFR

...2012-01-01 2012-01-01 false Accident investigation plan. 415.41 Section...a Federal Launch Range § 415.41 Accident investigation plan. An applicant must file an accident investigation plan (AIP), that...

2012-01-01

388

14 CFR 291.22 - Aircraft accident liability insurance requirement.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Aircraft accident liability insurance requirement. 291...Transportation § 291.22 Aircraft accident liability insurance requirement...carrier has and maintains in effect aircraft accident liability coverage that meets the...

2011-01-01

389

48 CFR 852.236-87 - Accident prevention.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Accident prevention. 852.236-87 ...Provisions and Clauses 852.236-87 Accident prevention. As prescribed in...insert the following clause: Accident Prevention (SEP 1993)...

2011-10-01

390

49 CFR 801.30 - Records from accident investigations.  

Code of Federal Regulations, 2011 CFR

... 2011-10-01 false Records from accident investigations. 801.30 Section... PUBLIC AVAILABILITY OF INFORMATION Accident Investigation Records § 801.30 Records from accident investigations. Upon completion...

2011-10-01

391

46 CFR 78.33-5 - Accidents to machinery.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Accidents to machinery. 78.33-5 Section...PASSENGER VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 78.33-5 Accidents to machinery. (a) In the event...

2011-10-01

392

14 CFR 420.59 - Launch site accident investigation plan.  

Code of Federal Regulations, 2012 CFR

... 2012-01-01 false Launch site accident investigation plan. 420.59 Section...a Licensee § 420.59 Launch site accident investigation plan. (a) General...shall develop and implement a launch site accident investigation plan that contains...

2012-01-01

393

46 CFR 78.33-5 - Accidents to machinery.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Accidents to machinery. 78.33-5 Section...PASSENGER VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 78.33-5 Accidents to machinery. (a) In the event...

2012-10-01

394

41 CFR 101-39.401 - Reporting of accidents.  

Code of Federal Regulations, 2012 CFR

... 2012-07-01 false Reporting of accidents. 101-39.401 Section 101-39...39-INTERAGENCY FLEET MANAGEMENT SYSTEMS 39.4-Accidents and Claims § 101-39.401 Reporting of accidents. (a) The operator of the...

2012-07-01

395

41 CFR 101-39.401 - Reporting of accidents.  

Code of Federal Regulations, 2011 CFR

... 2007-07-01 true Reporting of accidents. 101-39.401 Section 101-39...39-INTERAGENCY FLEET MANAGEMENT SYSTEMS 39.4-Accidents and Claims § 101-39.401 Reporting of accidents. (a) The operator of the...

2011-07-01

396

48 CFR 852.236-87 - Accident prevention.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Accident prevention. 852.236-87 ...Provisions and Clauses 852.236-87 Accident prevention. As prescribed in...insert the following clause: Accident Prevention (SEP 1993)...

2012-10-01

397

14 CFR 420.59 - Launch site accident investigation plan.  

Code of Federal Regulations, 2011 CFR

... 2011-01-01 false Launch site accident investigation plan. 420.59 Section...a Licensee § 420.59 Launch site accident investigation plan. (a) General...shall develop and implement a launch site accident investigation plan that contains...

2011-01-01

398

33 CFR 173.55 - Report of casualty or accident.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Report of casualty or accident. 173.55 Section 173.55 Navigation...BOATING SAFETY VESSEL NUMBERING AND CASUALTY AND ACCIDENT REPORTING Casualty and Accident Reporting § 173.55 Report of...

2012-07-01

399

14 CFR 415.41 - Accident investigation plan.  

Code of Federal Regulations, 2011 CFR

...2011-01-01 2011-01-01 false Accident investigation plan. 415.41 Section...a Federal Launch Range § 415.41 Accident investigation plan. An applicant must file an accident investigation plan (AIP), that...

2011-01-01

400

49 CFR 801.30 - Records from accident investigations.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false Records from accident investigations. 801.30 Section... PUBLIC AVAILABILITY OF INFORMATION Accident Investigation Records § 801.30 Records from accident investigations. Upon completion...

2012-10-01

401

46 CFR 196.30-5 - Accidents to machinery.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Accidents to machinery. 196.30-5 Section...RESEARCH VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 196.30-5 Accidents to machinery. (a) In the event...

2012-10-01

402

49 CFR 840.3 - Notification of railroad accidents.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Notification of railroad accidents. 840.3 Section 840.3 Transportation...RULES PERTAINING TO NOTIFICATION OF RAILROAD ACCIDENTS § 840.3 Notification of railroad accidents. The operator of a railroad...

2012-10-01

403

46 CFR 97.30-5 - Accidents to machinery.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Accidents to machinery. 97.30-5 Section...MISCELLANEOUS VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 97.30-5 Accidents to machinery. (a) In the event...

2012-10-01

404

50 CFR 25.72 - Reporting of accidents.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Reporting of accidents. 25.72 Section 25.72 Wildlife and Fisheries...PROVISIONS Safety Regulations § 25.72 Reporting of accidents. Accidents involving damage to property, injury to...

2011-10-01

405

50 CFR 25.72 - Reporting of accidents.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Reporting of accidents. 25.72 Section 25.72 Wildlife and Fisheries...PROVISIONS Safety Regulations § 25.72 Reporting of accidents. Accidents involving damage to property, injury to...

2012-10-01

406

22 CFR 102.17 - Reports on accident.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 2012-04-01 false Reports on accident. 102.17 Section 102.17 Foreign Relations...FUNCTIONS CIVIL AVIATION United States Aircraft Accidents Abroad Foreign Aircraft Accidents Involving United States Persons Or...

2012-04-01

407

22 CFR 102.17 - Reports on accident.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 2011-04-01 false Reports on accident. 102.17 Section 102.17 Foreign Relations...FUNCTIONS CIVIL AVIATION United States Aircraft Accidents Abroad Foreign Aircraft Accidents Involving United States Persons Or...

2011-04-01

408

49 CFR 840.3 - Notification of railroad accidents.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Notification of railroad accidents. 840.3 Section 840.3 Transportation...RULES PERTAINING TO NOTIFICATION OF RAILROAD ACCIDENTS § 840.3 Notification of railroad accidents. The operator of a railroad...

2011-10-01

409

46 CFR 326.4 - Reports of accidents and occurrences.  

Code of Federal Regulations, 2012 CFR

... 2012-10-01 false Reports of accidents and occurrences. 326.4 Section...AGREEMENTS WITH AGENTS § 326.4 Reports of accidents and occurrences. The Agent shall report every accident or occurrence of a P&I...

2012-10-01

410

41 CFR 101-39.401 - Reporting of accidents.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 true Reporting of accidents. 101-39.401 Section 101-39...39-INTERAGENCY FLEET MANAGEMENT SYSTEMS 39.4-Accidents and Claims § 101-39.401 Reporting of accidents. (a) The operator of the...

2010-07-01

411

46 CFR 78.33-5 - Accidents to machinery.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Accidents to machinery. 78.33-5 Section...PASSENGER VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 78.33-5 Accidents to machinery. (a) In the event...

2010-10-01

412

14 CFR 415.41 - Accident investigation plan.  

Code of Federal Regulations, 2010 CFR

...2010-01-01 2010-01-01 false Accident investigation plan. 415.41 Section...a Federal Launch Range § 415.41 Accident investigation plan. An applicant must file an accident investigation plan (AIP), that...

2010-01-01

413

49 CFR 225.11 - Reporting of accidents/incidents.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Reporting of accidents/incidents. 225.11 Section 225...DEPARTMENT OF TRANSPORTATION RAILROAD ACCIDENTS/INCIDENTS: REPORTS CLASSIFICATION...INVESTIGATIONS § 225.11 Reporting of accidents/incidents. Each railroad...

2010-10-01

414

14 CFR 420.59 - Launch site accident investigation plan.  

Code of Federal Regulations, 2010 CFR

... 2010-01-01 false Launch site accident investigation plan. 420.59 Section...a Licensee § 420.59 Launch site accident investigation plan. (a) General...shall develop and implement a launch site accident investigation plan that contains...

2010-01-01

415

50 CFR 25.72 - Reporting of accidents.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Reporting of accidents. 25.72 Section 25.72 Wildlife and Fisheries...PROVISIONS Safety Regulations § 25.72 Reporting of accidents. Accidents involving damage to property, injury to...

2010-10-01

416

49 CFR 233.5 - Accidents resulting from signal failure.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Accidents resulting from signal failure. 233...REPORTING REQUIREMENTS § 233.5 Accidents resulting from signal failure. ...whenever it learns of the occurrence of an accident/incident arising from the...

2010-10-01

417

33 CFR 173.55 - Report of casualty or accident.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 false Report of casualty or accident. 173.55 Section 173.55 Navigation...BOATING SAFETY VESSEL NUMBERING AND CASUALTY AND ACCIDENT REPORTING Casualty and Accident Reporting § 173.55 Report of...

2010-07-01

418

22 CFR 102.17 - Reports on accident.  

Code of Federal Regulations, 2010 CFR

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

2010-04-01

419

48 CFR 852.236-87 - Accident prevention.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Accident prevention. 852.236-87 ...Provisions and Clauses 852.236-87 Accident prevention. As prescribed in...insert the following clause: Accident Prevention (SEP 1993)...

2010-10-01

420

49 CFR 801.30 - Records from accident investigations.  

Code of Federal Regulations, 2010 CFR

... 2010-10-01 false Records from accident investigations. 801.30 Section... PUBLIC AVAILABILITY OF INFORMATION Accident Investigation Records § 801.30 Records from accident investigations. Upon completion...

2010-10-01

421

49 CFR 840.3 - Notification of railroad accidents.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Notification of railroad accidents. 840.3 Section 840.3 Transportation...RULES PERTAINING TO NOTIFICATION OF RAILROAD ACCIDENTS § 840.3 Notification of railroad accidents. The operator of a railroad...

2010-10-01

422

46 CFR 97.30-5 - Accidents to machinery.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Accidents to machinery. 97.30-5 Section...MISCELLANEOUS VESSELS OPERATIONS Reports of Accidents, Repairs, and Unsafe Equipment § 97.30-5 Accidents to machinery. (a) In the event...

2010-10-01

423

36 CFR 1004.4 - Report of motor vehicle accident.  

Code of Federal Regulations, 2010 CFR

... Report of motor vehicle accident. 1004.4 Section 1004...PRESIDIO TRUST VEHICLES AND TRAFFIC SAFETY § 1004.4 Report of motor vehicle accident. (a) The operator of a motor vehicle involved in an accident resulting in property...

2010-07-01

424

36 CFR 4.4 - Report of motor vehicle accident.  

Code of Federal Regulations, 2010 CFR

... Report of motor vehicle accident. 4.4 Section 4.4...THE INTERIOR VEHICLES AND TRAFFIC SAFETY § 4.4 Report of motor vehicle accident. (a) The operator of a motor vehicle involved in an accident resulting in property...

2010-07-01

425

A Theoretical Framework for Diagrams and Information Graphics in Research and Education.  

ERIC Educational Resources Information Center

Information graphics or diagrams are two-dimensional maps of relationships that present information. Creators and interpreters of diagrams need to know what makes some diagrams more effective in communicating information. This paper suggests a theoretical framework for diagram classification to make this possible. This framework consists of two…

Hardin, Pris

426

Ambiguity in Visual Language Theory and Its Role in Diagram Parsing  

Microsoft Academic Search

To take advantage of the ever-increasing volume of diagrams in electronic form, it is crucial that we have methods for parsing diagrams. Once a structured, content-based description is built for a diagram, it can be indexed for search, retrieval, and use. Whenever broad- coverage grammars are built to parse a wide range of objects, whether natural language or diagrams, the

Robert P. Futrelle

1999-01-01

427

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

428

Quality of Service Beyond the Traditional Fundamental Diagram 1July 2008 Ruhr-University Bochum  

E-print Network

Quality of Service Beyond the Traditional Fundamental Diagram 1July 2008 Ruhr-University Bochum THE TRADITIONAL FUNDAMENTAL DIAGRAM #12;Quality of Service Beyond the Traditional Fundamental Diagram 2July 2008;Quality of Service Beyond the Traditional Fundamental Diagram 3July 2008 Requirements: Description

Bertini, Robert L.

429

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

430

TRAVEL ACCIDENT INSURANCE PLAN 01-01-2012 The Travel Accident Insurance Plan provides 24-hour Accident coverage while on Authorized  

E-print Network

1 TRAVEL ACCIDENT INSURANCE PLAN 01-01-2012 The Travel Accident Insurance Plan provides 24-hour Accident coverage while on Authorized Business Travel. Coverage begins at the actual starting point. Please note that the Employer reserves the right to amend or terminate this Travel Accident Insurance

Johnson, Peter D.

431

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

432

Sequential Voronoi diagram calculations using simple chemical reactions  

E-print Network

In our recent paper [de Lacy Costello et al. 2010] we described the formation of complex tessellations of the plane arising from the various reactions of metal salts with potassium ferricyanide and ferrocyanide loaded gels. In addition to producing colourful tessellations these reactions are naturally computing generalised Voronoi diagrams of the plane. The reactions reported previously were capable of the calculation of three distinct Voronoi diagrams of the plane. As diffusion coupled with a chemical reaction is responsible for the calculation then this is achieved in parallel. Thus an increase in the complexity of the data input does not utilise additional computational resource. Additional benefits of these chemical reactions is that a permanent record of the Voronoi diagram calculation (in the form of precipitate free bisectors) is achieved, so there is no requirement for further processing to extract the calculation results. Previously it was assumed that the permanence of the results was also a potenti...

Costello, Ben de Lacy; Adamatzky, Andy

2012-01-01

433

Photon capture cones and embedding diagrams of the Ernst spacetime  

E-print Network

The differences between the character of the Schwarzschild and Ernst spacetimes are illustrated by comparing the photon capture cones, and the embedding diagrams of the $t=\\mathrm{const}$ sections of the equatorial planes of both the ordinary and optical reference geometry of these spacetimes. The non-flat asymptotic character of the Ernst spacetime reflects itself in two manifest facts: the escape photon cones correspond to purely outward radial direction, and the embedding diagrams of both the ordinary and optical geometry shrink to zero radius asymptotically. Using the properties of the embedding diagrams, regions of these spacetimes which could have similar character are estimated, and it is argued that they can exist for the Ernst spacetimes with a sufficiently low strength of the magnetic field.

Zden?k Stuchlík; Stanislav Hledík

2008-03-17

434

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

435

[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

436

Potential-pH diagrams for iron in supercritical water  

SciTech Connect

Potential-pH diagrams for the iron-water system were extended into the supercritical temperature range using thermodynamic data generated by the quasi-thermodynamic model of Helgeson, et al. For subcritical temperatures (T < 374 C), the diagrams agreed well with those available in the literature. The domain of thermodynamic immunity of iron decreased significantly with increasing T, particularly > 300 C. The domain of possible protection of iron by formation of a thermodynamically stable passive oxide layer shifted to lower pH values with increasing T.

Kriksunov, L.B.; Macdonald, D.D. [Pennsylvania State Univ., University Park, PA (United States). Center for Advanced Materials

1997-08-01

437

Using Dynamic Master Logic Diagram for component partial failure analysis  

SciTech Connect

A methodology using the Dynamic Master Logic Diagram (DMLD) for the evaluation of component partial failure is presented. Since past PRAs have not focused on partial failure effects, the reliability of components are only based on the binary state assumption, i.e. defining a component as fully failed or functioning. This paper is to develop an approach to predict and estimate the component partial failure on the basis of the fuzzy state assumption. One example of the application of this methodology with the reliability function diagram of a centrifugal pump is presented.

Ni, T. [Halliburton NUS Corp., Gaithersburg, MD (United States); Modarres, M. [Univ. of Maryland, College Park, MD (United States). Center for Reliability Engineering

1996-12-01

438

A preliminary ferritic-martensitic stainless steel constitution diagram  

SciTech Connect

This paper describes preliminary research to develop a constitution diagram that will more accurately predict the microstructure of ferritic and martensitic stainless steel weld deposits. A button melting technique was used to produce a wide range of compositions using mixtures of conventional ferritic and martensitic stainless steels, including types 403, 409, 410, 430, 439 and 444. These samples were prepared metallographically, and the vol-% ferrite and martensite was determined quantitatively. In addition, the hardness and ferrite number (FN) were measured. Using this data, a preliminary constitution diagram is proposed that provides a more accurate method for predicting the microstructures of arc welds in ferritic and martensitic stainless steels.

Balmforth, M.C.; Lippold, J.C. [Ohio State Univ., Columbus, OH (United States). Welding and Joining Metallurgy Group

1998-01-01

439

Phase diagram of mechanically stretched DNA: The salt effect  

E-print Network

The cations, in form of salt, present in the solution containing DNA play a crucial role in the opening of two strands of DNA. We use a simple non linear model and investigate the role of these cations on the mechanical unzipping of DNA. The Hamiltonian is modified to incoporate the solvent effect and the cations present in the solution. We calculate the melting temperature as well as the critical force that is required to unzip the DNA molecule as a function of salt concentration of the solution. The phase diagrams are found to be in close agreement with the experimental phase diagrams.

Amar Singh; Navin Singh

2014-09-05

440

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

441

Phase diagram of the Ising square lattice with competing interactions  

NASA Astrophysics Data System (ADS)

We restudy the phase diagram of the 2D-Ising model with competing interactions J1 on nearest neighbour and J2 on next-nearest neighbour bonds via Monte-Carlo simulations. We present the finite temperature phase diagram and introduce computational methods which allow us to calculate transition temperatures close to the criticalpoint at J2 = J1/2. Further on we investigate the character of the different phase boundariesand find that the transition is weakly first order formoderate J2 > J1/2.

Kalz, A.; Honecker, A.; Fuchs, S.; Pruschke, T.

2008-10-01

442

The phase diagram of the staggered row model for magnetism  

E-print Network

THE PHASE DIAGRAM OF THE STAGGERED ROW MODEL FOR IvIAGNETISM A Thesis by WEIMIN ZHANG Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August... Ground State for rl ) 0 2 2 Ground State for 0 & 0 2. 3 Further Study 5 6 8 12 III MEAN FIELD THEORY 3. 1 Mean Field Equations for rl ) 0 3. 2 Mean Field Equations for rl & 0 14 15 16 IV PHASE DIAGRAM 4. 1 Spiral Phase 4. 2 AFt Phase 4. 3...

Zhang, Weimin

2012-06-07

443

Exploring the phase diagram of QCD with complex Langevin simulations  

E-print Network

Simulations of QCD with a finite chemical potential typically lead to a severe sign problem, prohibiting any standard Monte Carlo approach. Complex Langevin simulations provide an alternative to sample path integrals with oscillating weight factors and therefore potentially enable the determination of the phase diagram of QCD. Here we present results for QCD in the limit of heavy quarks and show evidence that the phase diagram can be mapped out by direct simulation. We apply adaptive step-size scaling and adaptive gauge cooling to ensure the convergence of these simulations.

Aarts, Gert; Jäger, Benjamin; Seiler, Erhard; Sexty, Denes; Stamatescu, Ion-Olimpiu

2014-01-01

444

Exploring the phase diagram of QCD with complex Langevin simulations  

E-print Network

Simulations of QCD with a finite chemical potential typically lead to a severe sign problem, prohibiting any standard Monte Carlo approach. Complex Langevin simulations provide an alternative to sample path integrals with oscillating weight factors and therefore potentially enable the determination of the phase diagram of QCD. Here we present results for QCD in the limit of heavy quarks and show evidence that the phase diagram can be mapped out by direct simulation. We apply adaptive step-size scaling and adaptive gauge cooling to ensure the convergence of these simulations.

Gert Aarts; Felipe Attanasio; Benjamin Jäger; Erhard Seiler; Denes Sexty; Ion-Olimpiu Stamatescu

2014-11-10

445

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

446

Phase diagram of epidemic spreading — unimodal vs. bimodal probability distributions  

NASA Astrophysics Data System (ADS)

Disease spreading on complex networks is studied in SIR model. Simulations on empirical complex networks reveal two specific regimes of disease spreading: local containment and epidemic outbreak. The variables measuring the extent of disease spreading are in general characterized by a bimodal probability distribution. Phase diagrams of disease spreading for empirical complex networks are introduced. A theoretical model of disease spreading on m-ary tree is investigated both analytically and in simulations. It is shown that the model reproduces qualitative features of phase diagrams of disease spreading observed in empirical complex networks. The role of tree-like structure of complex networks in disease spreading is discussed.

Lan?i?, Alen; Antulov-Fantulin, Nino; Šiki?, Mile; Štefan?i?, Hrvoje

2011-01-01

447

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

448

Colour-Magnitude Diagrams from microlensing projects and galactic structure  

E-print Network

The results, obtained with the stellar population synthesis technique, are summarized for galactic structure and stellar population studies of our Galaxy. Emphasis is put on the analysis (extinction, disc structure, bar population) of the OGLE colour-magnitude diagram from Baade's Window.

Y. K. Ng

1996-07-18

449

Cloud computing and hyperbolic Voronoi diagrams on the sphere  

E-print Network

In this work we study the minimization problem for the total distance in a cloud computing network on the sphere. We give a solution to this problem in terms of hyperbolic Voronoi diagrams on the sphere. We present results of computer simulations illustrating the solution.

Bleher, Pavel

2012-01-01

450

Motion planning in a plane using generalized Voronoi diagrams  

Microsoft Academic Search

An algorithm for planning a collision-free path for a rectangle in a planar workspace populated with polygonal obstacles is presented. Heuristic techniques are used to plan the motion along a nominal path obtained from a generalized Voronoi diagram (GVD). The algorithm was demonstrated to be quite fast with execution times comparable to, or exceeding, those of the freeway method. Unlike

O. Takahashi; R. J. Schilling

1989-01-01

451

Randomized Incremental Construction of Delaunay and Voronoi Diagrams  

Microsoft Academic Search

In this paper we give a new randomized incremental algorithm for the construction of planar Voronoi diagrams and Delaunay triangulations. The new algorithm is more online than earlier similar methods, takes expected time O(n log n) and space O(n), and is eminently practical to implement. The analysis of the algorithm is also interesting in its own right and can serve

Leonidas J. Guibas; Donald E. Knuth; Micha Sharir

1990-01-01

452

Power-aware FPGA logic synthesis using binary decision diagrams  

Microsoft Academic Search

Power consumption in field programmable gate arrays (FPGAs) has become an important issue as the FPGA market has grown to include mobile platforms. In this work we present a power-aware logic optimization tool that is specialized to facilitate subsequent power-aware technology mapping. Our synthesis framework uses binary decision diagram (BDD) based collapsing and decomposition techniques in conjunction with signal switching

Kevin Oo Tinmaung; David Howland; Russell Tessier

2007-01-01

453

DIAGRAMMING, ARGUMENTATION SCHEMES AND CRITICAL QUESTIONS Douglas Walton  

E-print Network

stereotypical patterns of reasoning. This paper is part of a project on the formalization of argumentation, so that it can be taught in the classroom, and applied by students # fine­grained, so that it can, for example, works to support not only computer representation, but also diagramming and classroom teaching

Reed, Chris

454

DIAGRAMMING, ARGUMENTATION SCHEMES AND CRITICAL QUESTIONS Douglas Walton  

E-print Network

stereotypical patterns of reasoning. This paper is part of a project on the formalization of argumentation, so that it can be taught in the classroom, and applied by students fine-grained, so that it can, for example, works to support not only computer representation, but also diagramming and classroom teaching

Reed, Chris

455

Spacing of Munsell Renotations in MacAdam's Geodesic Diagram.  

PubMed

The results of a brief experiment are described in which the perception of certain color intervals is compared with their corresponding intervals as computed from MacAdam's geodesic chromaticity diagram, the Munsell renotation system, using the Godlove formula and the 1964 CIE color-difference formula. PMID:20119337

Witzel, R F

1972-10-01

456

Time Exceptions in Sequence Diagrams Oddleif Halvorsen1  

E-print Network

. We give a for- mal definition of time exceptions in sequence diagrams and show that the concepts Both the UML 2.1 simple time model (Sect. 2.1) and the UML profile for Schedulability, Performance and Time (Sect. 2.2) introduce concepts and no- tations for defining time constraints, but do not consider

Runde, Ragnhild Kobro

457

Representing Embedded System Sequence Diagrams as a Formal Language  

Microsoft Academic Search

Sequence Diagrams (SDs) have proven useful for describing transaction-oriented systems, and can form a basis for creating statecharts. However, distributed embedded systems require special support for branching, state information, and composing SDs. Actors must traverse many SDs when using a complex embedded system. Current techniques are insufficiently rich to represent the behavior of real systems, such as elevators, without augmentation,

Elizabeth Latronico; Philip Koopman

2001-01-01

458

Student's misunderstanding in using a ray diagram in light refraction  

Microsoft Academic Search

This paper shows the results of an investigation in conceptual understanding of light refraction of 261 Thai high- school students. The students of grades 11-12 were asked to explain a simple refraction phenomenon. They were asked to draw a ray diagram to indicate the position of an image of a light bulb which was located under the water. The results

Kreetha Keawkhong; Narumon Emarat; Kwan Arayathanitkul; Chernchok Soankwan; Ratchapak Chitaree

2008-01-01

459

Phase Diagram for the Kf-YF3 System.  

National Technical Information Service (NTIS)

Differential thermal analysis measurements were used to characterize a phase diagram for the KF-YF3 system at compositions between 0 and 60 molepercent YF3. A congruent melting point compound was observed at 3KF-YF3, which melts at 965C and undergoes soli...

B. Porter, R. E. Meaker, P. R. Bremner

1969-01-01

460

VORONOI DIAGRAMS AND ORNAMENTAL DESIGN Craig S. Kaplan  

E-print Network

with pinpoints of different coloured bacteria. The bacteria grow outward, the radius of each one's territory receiving the colour of the first bacteria to reach it (which is simply the one that happened to be closest Voronoi diagrams in a series of recursive steps [9]. Here, I present some further results in the use

Kaplan, Craig S.

461

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

462

Technical Note Kitagawa-Takahashi diagrams define the limiting conditions  

E-print Network

Technical Note Kitagawa-Takahashi diagrams define the limiting conditions for cyclic fatigue Abstract: As cyclic fatigue is considered to be a major cause of clinical tooth fractures, achieving fatigue) loading, rather than a single trau- matic loading event.2,3 Cyclic stresses play a simi- larly

Ritchie, Robert

463

Phase shifts of the paired wings of butterfly diagrams  

NASA Astrophysics Data System (ADS)

Sunspot groups observed by the Royal Greenwich Observatory/US Air Force/NOAA from 1874 May to 2008 November and the Carte Synoptique solar filaments from 1919 March to 1989 December are used to investigate the relative phase shift of the paired wings of butterfly diagrams of sunspot and filament activities. Latitudinal migration of sunspot groups (or filaments) does asynchronously occur in the northern and southern hemispheres, and there is a relative phase shift between the paired wings of their butterfly diagrams in a cycle, making the paired wings spatially asymmetrical on the solar equator. It is inferred that hemispherical solar activity strength should evolve in a similar way within the paired wings of a butterfly diagram in a cycle, demonstrating the paired wings phenomenon and showing the phase relationship between the northern and southern hemispherical solar activity strengths, as well as a relative phase shift between the paired wings of a butterfly diagram, which should bring about almost the same relative phase shift of hemispheric solar activity strength.

Li, Ke-Jun; Liang, Hong-Fei; Feng, Wen

2010-11-01

464

Computer-Generated Phase Diagrams for Binary Mixtures.  

ERIC Educational Resources Information Center

Computer programs that generate projections of thermodynamic phase surfaces through computer graphics were used to produce diagrams representing properties of water and steam and the pressure-volume-temperature behavior of most of the common equations of state. The program, program options emphasizing thermodynamic features of interest, and…

Jolls, Kenneth R.; And Others

1983-01-01

465

XML Based Representation of DFD Removal of Diagramming Ambiguity  

Microsoft Academic Search

In the world of Information Technology, the working of a information system is well explained with the use of Data Flow Diagrams (DFD). DFDs are one of the three essential perspectives of the Structured Systems Analysis and Design Method (SSADM). [3]The sponsor of a project and the end users are briefed and consulted throughout all stages of a system's evolution.

Swapna Salil Kolhatkar

2011-01-01

466

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

467

Architectural Framework for Generic Modeling and Diagramming in the Cloud  

Microsoft Academic Search

This paper is aimed at presenting a concept of a flexible diagramming framework for building engineering and educational applications. The framework was designed to serve as a platform for online services and collaborative environments where users typically work on remotely stored, shared data through a browser-based user interface. The paper summarizes the common requirements towards such services, overviews related approaches

Laszlo Juracz; Larry Howard

468

Mobius Transformations, Power Diagrams, Lombardi Drawings, and Soap Bubbles  

E-print Network

M¨obius Transformations, Power Diagrams, Lombardi Drawings, and Soap Bubbles David Eppstein Euro of degree four) has a planar Lombardi drawing We also use it to characterize the graphs of planar soap bubble clusters: they are exactly the bridgeless 3-regular planar graphs #12;Inversion through a circle

Eppstein, David

469

33. Historic photo of section diagram of Building 202, April ...  

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

33. Historic photo of section diagram of Building 202, April 30, 1958. On file at NASA Plumbrook Research Center, Sandusky, Ohio. NASA photo number C-47807. - Rocket Engine Testing Facility, GRC Building No. 202, NASA Glenn Research Center, Cleveland, Cuyahoga County, OH

470

Higher-dimensional Voronoi diagrams in linear expected time  

Microsoft Academic Search

This work is the first to validate theoretically the suspicions of many researchers — that the “average” Voronoi diagram is combinatorially quite simple and can be constructed quickly. Specifically, assuming that dimension d is fixed, and that n input points are chosen independently from the uniform distribution on the unit d-ball, it is proved thatthe expected number of simplices of

Rex A. Dwyer

1989-01-01

471

Automatic Code Generation From UML Class and Statechart Diagrams  

E-print Network

Fariha and our children, Rameen and Sarmad for their love, encouragement and support #12;1 Abstract of automated software tools that facilitate the development process from analysis through coding. In UML of the classes is represented by a set of statechart diagrams. To facilitate the software development process

Tanaka, Jiro

472

Modelling of CCT diagrams for engineering and constructional steels  

Microsoft Academic Search

The paper presents the methodology of modelling using the neural networks and regression method of the relationship between the chemical composition and austenitizing temperature, and the supercooled austenite transformation kinetics during the continuous cooling. The worked out model makes possible to calculate a CCT diagram for the steel with a known chemical composition and analysis of the influence of particular

J. Trzaska; L. A. Dobrza?ski

2007-01-01

473

Integrating Mathematics and Science: Ecology and Venn Diagrams  

ERIC Educational Resources Information Center

Efforts to integrate mathematics and science have been widely recognized by mathematics and science educators. However, successful integration of these two important school disciplines remains a challenge. In this article, a mathematics and science activity extends the use of Venn diagrams to a life science context and then circles back to a…

Leszczynski, Eliza; Munakata, Mika; Evans, Jessica M.; Pizzigoni, Francesca

2014-01-01

474

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

475

Diagram of the Apollo 15 & 16 Gamma-ray Detector  

NSDL National Science Digital Library

This is a diagram of the Apollo 15 & 16 Gamma-ray Detector from the NASA website. Primarily intended to study the Moon's radioactivity, it made measurements of the cosmic gamma-ray background during its trip. It shows measurements in millimeters.

2010-05-05

476

The BPM to UML activity diagram transformation using XSLT  

E-print Network

business processes of an organization. Problems con- nected with a complexity of notation and missing, 118 00, Praha 1, Czech Republic karel.richta@mff.cuni.cz Abstract. The Business Process Model represented as a diagram in Business Process Modeling Notation (BPMN) is a commonly used way how to describe

477

A fault tree analysis strategy using binary decision diagrams  

Microsoft Academic Search

The use of binary decision diagrams (BDDs) in fault tree analysis provides both an accurate and efficient means of analysing a system. There is a problem, however, with the conversion process of the fault tree to the BDD. The variable ordering scheme chosen for the construction of the BDD has a crucial effect on its resulting size and previous research

Karen A. Reay; John D. Andrews

2002-01-01

478

Phase diagram of compressively strained nickelate thin films  

NASA Astrophysics Data System (ADS)

The complex phase diagrams of strongly correlated oxides arise from the coupling between physical and electronic structure. This can lead to a renormalization of the phase boundaries when considering thin films rather than bulk crystals due to reduced dimensionality and epitaxial strain. The well-established bulk RNiO3 phase diagram shows a systematic dependence between the metal-insulator transition and the perovskite A-site rare-earth ion, R. Here, we explore the equivalent phase diagram for nickelate thin films under compressive epitaxial strain. We determine the metal-insulator phase diagram for the solid solution of Nd1-yLayNiO3 thin films within the range 0 ? y ? 1. We find qualitative similarity between the films and their bulk analogs, but with an overall renormalization in the metal-insulator transition to lower temperature. A combination of x-ray diffraction measurements and soft x-ray absorption spectroscopy indicates that the renormalization is due to increased Ni-O bond hybridization for coherently strained thin films.

Disa, A. S.; Kumah, D. P.; Ngai, J. H.; Specht, E. D.; Arena, D. A.; Walker, F. J.; Ahn, C. H.

2013-09-01

479

Ternary Phase Diagrams that Relate to the Plutonium Immobilization Ceramic.  

National Technical Information Service (NTIS)

The plutonium immobilization ceramic consists primarily of a pyrochlore titanate phase of the approximate composition Ca0.97Hf0.17Pu0.22U0.39Gd0.24 Ti2O7. In this study, a series of ternary phase diagrams was constructed to evaluate the relationship of va...

B. B. Ebbinghaus, O. H. Krikorian, E. R. Vance

2001-01-01

480

Galaxy emission line classification using 3D line ratio diagrams  

E-print Network

Two-dimensional (2D) line ratio diagnostic diagrams have become a key tool in understanding the excitation mechanisms of galaxies. The curves used to separate the different regions - HII-like or else excited by an active galactic nucleus (AGN) - have been refined over time but the core technique has not evolved significantly. However, the classification of galaxies based on their emission line ratios really is a multi-dimensional problem. Here we exploit recent software developments to explore the potential of three-dimensional (3D) line ratio diagnostic diagrams. We introduce a specific set of 3D diagrams, the ZQE diagrams, which separate the oxygen abundance and the ionisation parameter of HII region-like spectra, and which also enable us to probe the excitation mechanism of the gas. By examining these new 3D spaces interactively, we define a new set of 2D diagnostics, the ZE diagnostics, which can provide the metallicity of objects excited by hot young stars, and which cleanly separate HII region-like obje...

Vogt, Frédéric P A; Kewley, Lisa J; Sutherland, Ralph S; Scharwaechter, Julia; Basurah, Hassan M; Ali, Alaa; Amer, Morsi A

2014-01-01

481

Study on execution time of ladder diagram in programmable controller  

Microsoft Academic Search

In this paper, we propose the simple experimental method to realize the execution time of ladder diagram (LD) in programmable controllers (PCs). Characteristics of the execution time of a LD are examined experimentally by using the fundamental LD with repetition. Moreover, we establish the estimation method of the execution time of LD. Thus, the relationship between the execution time and

Yoshiaki Itoh; Iko Miyazawa; Takashi Sekiguchi

1998-01-01

482

Diagrams: Useful Tools for Investigating a Student's Understanding of Buoyancy  

ERIC Educational Resources Information Center

Sometimes it is difficult to decide whether a student has a true understanding of a physics concept or whether they are very good at rote learning key words and phrases. Sometimes, when you are marking exams, you feel you have to give the student full marks because everything is there, even though it is not quite "right". This is where a diagram

Creagh, Christine

2008-01-01

483

An Efficient Exhaustive Anytime Sampling Algorithm for Influence Diagrams  

E-print Network

An Efficient Exhaustive Anytime Sampling Algorithm for Influence Diagrams Daniel Garcia-Sanchez and Marek J. Druzdzel Decision Systems Laboratory, School of Information Sciences and Intelligent Systems an efficient sampling algorithm for solving influence dia- grams that achieves its efficiency by testing

Druzdzel, Marek J.

484

AIAA-2005-0196 OPTIMIZED GOODMAN DIAGRAM FOR THE  

E-print Network

Goodman diagram for a fiberglass composite that is a typical wind turbine blade material of Aeronautics and Astronautics 2 a = Amplitude of the stress cycle m = Mean stress of the fatigue cycle min a detailed description of the fatigue load spectra and the fatigue behavior of the blade material. The latter

485

Model Checking Synchronous Timing Diagrams , E. Allen Emerson1  

E-print Network

Model Checking Synchronous Timing Diagrams Nina Amla1 , E. Allen Emerson1 , Robert P. Kurshan2 , and Kedar S. Namjoshi2 1 Department of Computer Sciences, University of Texas at Austin {namla,emerson}@cs.utexas.edu http://www.cs.utexas.edu/users/{namla,emerson} 2 Bell Laboratories, Lucent Technologies {k

Namjoshi, Kedar

486

Energy Diagrams for Enzyme-Catalyzed Reactions: Concepts and Misconcepts  

ERIC Educational Resources Information Center

Despite the utility that energy diagrams have as a teaching and learning tool, a survey of their use, in seven popular Biochemistry textbooks, reveals that there is certain confusion around this topic. In our opinion, this confusion arises from the reluctance of authors to consider and indicate the conditions under which the reaction being…

Aledo, J. Carlos; Lobo, Carolina; del Valle, Alicia Esteban

2003-01-01

487

Phase diagram and influence of defects in the double perovskites  

Microsoft Academic Search

The phase diagram of the double perovskites of the type Sr2-xLaxFeMoO6 is analyzed, with and without disorder due to antisites. In addition to an homogeneous half metallic ferrimagnetic phase in the absence of doping and disorder, we find antiferromagnetic phases at large dopings, and other ferrimagnetic phases with lower saturation magnetization, in the presence of disorder.

J. L. Alonso; L. A. Fernández; F. Guinea; F. Lesmes; V. Martín-Mayor

2003-01-01

488

Composition Inference for UML Class Diagrams Ana Milanova  

E-print Network

-to analysis, reverse engineering, ownership 1. INTRODUCTION In modern software development design recovery through reverse engineering is performed often; in a typical iterative development process reverse in a tool for the reverse engineering of UML class diagrams. Firstly, recovery of composition relationships

Bystroff, Chris

489

The Translation of Star Schema into Entity-Relationship Diagrams  

Microsoft Academic Search

The star schema is widely accepted as a proper underlying table structure for data warehouses, but enterprise data is frequently defined in terms of entity-relationship diagrams. A key issue for data warehouse designers is how to move from legacy OLTP designs into the star schema. In this paper, we examine the semantics and constraints of the star schema in some

Michael Krippendorf; Il-yeol Song

1997-01-01

490

Graphic elicitation: using research diagrams as interview stimuli  

Microsoft Academic Search

Diagrams are effective instruments of thought and a valuable tool in conveying those thoughts to others. As such, they can be usefully employed as representations of a research domain and act as stimulus materials in interviews. This process of graphic elicitation may encourage contributions from interviewees that are difficult to obtain by other means. By representing concepts and relationships that

NATHAN CRILLY; ALAN F BLACKWELL; P JOHN CLARKSON

2006-01-01

491

Strength diagrams of fibrous composites with unidirectional structure  

NASA Technical Reports Server (NTRS)

The dependence of the composite strength on the volume proportion of fiber and the transfer factor is analyzed. Four types of diagrams are constructed for the strength of composites as a function of the volume proportion of fibers and the transfer factor.

Ivanova, V. S.; Ustinov, L. M.

1982-01-01

492

Phase diagram of the disordered Bose-Hubbard model  

SciTech Connect

We establish the phase diagram of the disordered three-dimensional Bose-Hubbard model at unity filling which has been controversial for many years. The theorem of inclusions, proven by Pollet et al. [Phys. Rev. Lett. 103, 140402 (2009)] states that the Bose-glass phase always intervenes between the Mott insulating and superfluid phases. Here, we note that assumptions on which the theorem is based exclude phase transitions between gapped (Mott insulator) and gapless phases (Bose glass). The apparent paradox is resolved through a unique mechanism: such transitions have to be of the Griffiths type when the vanishing of the gap at the critical point is due to a zero concentration of rare regions where extreme fluctuations of disorder mimic a regular gapless system. An exactly solvable random transverse field Ising model in one dimension is used to illustrate the point. A highly nontrivial overall shape of the phase diagram is revealed with the worm algorithm. The phase diagram features a long superfluid finger at strong disorder and on-site interaction. Moreover, bosonic superfluidity is extremely robust against disorder in a broad range of interaction parameters; it persists in random potentials nearly 50 ({exclamation_point}) times larger than the particle half-bandwidth. Finally, we comment on the feasibility of obtaining this phase diagram in cold-atom experiments, which work with trapped systems at finite temperature.

Gurarie, V. [Department of Physics, University of Colorado, Boulder, Colorado 80309 (United States); Pollet, L. [Physics Department, Harvard University, Cambridge, Massachusetts 02138 (United States); Prokof'ev, N. V.; Svistunov, B. V. [Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003 (United States); Russian Research Center, 'Kurchatov Institute', 123182 Moscow (Russian Federation); Troyer, M. [Theoretische Physik, ETH Zurich, 8093 Zurich (Switzerland)

2009-12-01

493

Cloud computing and hyperbolic Voronoi diagrams on the sphere  

E-print Network

In this work we study the minimization problem for the total distance in a cloud computing network on the sphere. We give a solution to this problem in terms of hyperbolic Voronoi diagrams on the sphere. We present results of computer simulations illustrating the solution.

Pavel Bleher; Caroline Shouraboura

2012-03-13

494

Analysing Collisions Using Minkowski Diagrams in Momentum Space  

ERIC Educational Resources Information Center

Momentum space and Minkowski diagrams are powerful tools for interpreting and analysing relativistic collisions in one or two spatial dimensions. All relevant quantities that characterize a collision, including the mass, velocity, momentum and energy of the interacting particles, both before and after collision, can be directly seen from a single…

Bokor, Nandor

2011-01-01

495

Energy Diagram for the Catalytic Decomposition of Hydrogen Peroxide  

ERIC Educational Resources Information Center

Drawing a schematic energy diagram for the decomposition of H[subscript 2]O[subscript 2] catalyzed by MnO[subscript 2] through a simple thermometric measurement outlined in this study is intended to integrate students' understanding of thermochemistry and kinetics of chemical reactions. The reaction enthalpy, delta[subscript r]H, is…

Tatsuoka, Tomoyuki; Koga, Nobuyoshi

2013-01-01

496

An Efficient Algorithm for Shielding Electromagnetic Topological Diagram  

Microsoft Academic Search

An electromagnetic topology method used to analyze interactions between electronic systems and electromagnetic environment is presented. Combining electromagnetic topology model with the graph theory, an efficient algorithm is obtained. The algorithm can find out all the paths which have a lower shielding coefficient than the given threshold K in the shielding electromagnetic topological diagram.

Yongfeng Wang; Chengda Yu; Chaowei Zhang

2010-01-01

497

51. Photocopy of diagram (from Station 'L' office files, Portland, ...  

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

51. Photocopy of diagram (from Station 'L' office files, Portland, Oregon) General Electric Company pamphlet, c.1923 SECTIONAL ARRANGEMENT OF THE 6,000 KW TURBINE GENERATOR BUILDING L1 - Portland General Electric Company, Station "L", 1841 Southeast Water Street, Portland, Multnomah County, OR

498

54. Photocopy of diagram (from Station 'L' office files, Portland, ...  

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

54. Photocopy of diagram (from Station 'L' office files, Portland, Oregon) General Electric Company pamphlet, c.1930 SECTIONAL ELEVATION OF THE 35,000 KW GENERATOR BUILDING L5 - Portland General Electric Company, Station "L", 1841 Southeast Water Street, Portland, Multnomah County, OR

499

53. Photocopy of diagram (from Station 'L' office files, Portland, ...  

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

53. Photocopy of diagram (from Station 'L' office files, Portland, Oregon) General Electric Company pamphlet, c.1925 SECTIONAL ELEVATION OF THE 20,000 KW GENERATOR BUILDING L1 - Portland General Electric Company, Station "L", 1841 Southeast Water Street, Portland, Multnomah County, OR

500

55. Photocopy of scale diagram (from Station 'L' office files, ...  

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

55. Photocopy of scale diagram (from Station 'L' office files, Portland, Oregon) Portland General Electric in house drawing, 1926 PLAN DEPICTING THE LOCATION OF THE CONDENSATE UNITS BUILDING L1 - Portland General Electric Company, Station "L", 1841 Southeast Water Street, Portland, Multnomah County, OR