Sample records for accident diagrams

  1. Stereo Diagrams

    NSDL National Science Digital Library

    Dexter Perkins

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

  2. Velocity diagrams

    NASA Technical Reports Server (NTRS)

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

    1972-01-01

    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.

  3. Lucidchart: Diagramming

    NSDL National Science Digital Library

    2012-08-24

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

  4. Venn Diagrams

    NSDL National Science Digital Library

    2011-05-24

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

  5. Venn Diagrams

    NSDL National Science Digital Library

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

  6. Venn Diagrams

    NSDL National Science Digital Library

    2011-05-23

    This lesson is designed to introduce students to sorting objects/elements using Venn diagrams. This lesson provides links to discussions and activities related to Venn diagrams as well as suggested ways to integrate them into the lesson. Finally, the lesson provides links to follow-up lessons designed for use in succession with the current one.

  7. Venn diagrams

    NSDL National Science Digital Library

    National Science Digital Library (NSDL) Middle School Portal Staff

    2008-03-10

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

  8. Phase Diagrams

    NSDL National Science Digital Library

    Dexter Perkins

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

  9. Nuclear accidents

    NSDL National Science Digital Library

    Iowa Public Television. Explore More Project

    2004-01-01

    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.

  10. Free Body Diagrams

    NSDL National Science Digital Library

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

  11. Nuclear accidents.

    PubMed

    Mobley, J A

    1982-05-01

    A nuclear accident with radioactive contamination can happen anywhere in the world. Because expert nuclear emergency teams may take several hours to arrive at the scene, local authorities must have a plan of action for the hours immediately following an accident. The site should be left untouched except to remove casualties. Treatment of victims includes decontamination and meticulous wound debridement. Acute radiation syndrome may be an overwhelming sequela. PMID:7072574

  12. Aesthetics of Class Diagrams

    Microsoft Academic Search

    Holger Eichelberger

    2002-01-01

    Visualization of object-oriented programs by class dia- grams is a widely used technique. So far no commonly agreed aesthetic criteria have been recorded in order to standardize and measure the quality of class diagrams. In this paper we focus on UML class diagrams, the standard notation for class diagrams in software engineering. We propose some aesthetic criteria which reflect the

  13. AFM Diagram Quiz

    NSDL National Science Digital Library

    Dexter Perkins

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

  14. Tree Diagrams and Probability

    NSDL National Science Digital Library

    2011-01-20

    This lesson is designed to develop students' ability to create tree diagrams and figure probabilities of events based on those diagrams. This lesson provides links to discussions and activities related to tree diagrams as well as suggested ways to work them into the lesson. Finally, the lesson provides links to follow-up lessons designed for use in succession with the current one.

  15. 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.

  16. A Diagramming Software for UML Class Diagrams

    Microsoft Academic Search

    Carsten Gutwengerl; Michael Jünger; Karsten Kleinl; Joachim Kupkel; Sebastian Leipert; Petra Mutzel

    \\u000a UML diagrams have become increasingly important in the engineering and reengineering processes for software systems. Of particular\\u000a interest are UML class diagrams whose purpose is to display class hierarchies (generalizations), associations, aggregations,\\u000a and compositions in one picture. The combination of hierarchical and non-hierarchical relations poses a special challenge\\u000a to a graph layout tool.

  17. Venn Diagram Shape Sorter

    NSDL National Science Digital Library

    2010-01-01

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

  18. PHASE DIAGRAMS Phase Rule

    E-print Network

    Subramaniam, Anandh

    diagram demarcates regions of existence of various phases. This is similar to a map which demarcates regions based on political, geographical, ecological etc. criteria. Phase diagrams are maps* Thorough) are extensively used in materials science and will be considered in detail in this chapter. Also, we shall

  19. Xilinx State Diagram

    E-print Network

    Izadi, Baback

    Xilinx State Diagram Tutorial Department of Electrical and Computer Engineering State University of New York ­ New Paltz © Fall 2006 Baback Izadi #12;Start a new Project Next. #12;This opens the New Project Dialog box. Click on New Source. Select State Diagram and give

  20. A framework for the assessment of severe accident management strategies

    SciTech Connect

    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

    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.

  1. A case study of electrostatic accidents in the process of oil-gas storage and transportation

    NASA Astrophysics Data System (ADS)

    Hu, Yuqin; Wang, Diansheng; Liu, Jinyu; Gao, Jianshen

    2013-03-01

    Ninety nine electrostatic accidents were reviewed, based on information collected from published literature. All the accidents over the last 30 years occurred during the process of oil-gas storage and transportation. Statistical analysis of these accidents was performed based on the type of complex conditions where accidents occurred, type of tanks and contents, and type of accidents. It is shown that about 85% of the accidents occurred in tank farms, gas stations or petroleum refineries, and 96% of the accidents included fire or explosion. The fishbone diagram was used to summarize the effects and the causes of the effects. The results show that three major reasons were responsible for accidents, including improper operation during loading and unloading oil, poor grounding and static electricity on human bodies, which accounted for 29%, 24% and 13% of the accidents, respectively. Safety actions are suggested to help operating engineers to handle similar situations in the future.

  2. The geometry of polynomial diagrams

    E-print Network

    Maksim Alennikov

    2015-02-18

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

  3. Diagram of Computer Keyboard

    NSDL National Science Digital Library

    Dr. Charles Ward

    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.

  4. Satellite Venn Diagram

    NSDL National Science Digital Library

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

  5. Phase Diagrams in Vivo

    NSDL National Science Digital Library

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

  6. Weyl Card Diagrams

    E-print Network

    Gregory C. Jones; John E. Wang

    2005-06-02

    To capture important physical properties of a spacetime we construct a new diagram, the card diagram, which accurately draws generalized Weyl spacetimes in arbitrary dimensions by encoding their global spacetime structure, singularities, horizons, and some aspects of causal structure including null infinity. Card diagrams draw only non-trivial directions providing a clearer picture of the geometric features of spacetimes as compared to Penrose diagrams, and can change continuously as a function of the geometric parameters. One of our main results is to describe how Weyl rods are traversable horizons and the entirety of the spacetime can be mapped out. We review Weyl techniques and as examples we systematically discuss properties of a variety of solutions including Kerr-Newman black holes, black rings, expanding bubbles, and recent spacelike-brane solutions. Families of solutions will share qualitatively similar cards. In addition we show how card diagrams not only capture information about a geometry but also its analytic continuations by providing a geometric picture of analytic continuation. Weyl techniques are generalized to higher dimensional charged solutions and applied to generate perturbations of bubble and S-brane solutions by Israel-Khan rods. This paper is a condensed and simplified presentation of the card diagrams in hep-th/0409070.

  7. Weyl card diagrams

    SciTech Connect

    Jones, Gregory [Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States); Wang, John E. [Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States); Department of Physics, National Taiwan University, Taipei 106, Taiwan (China); National Center for Theoretical Sciences, Taiwan, National Taiwan University, Taipei 10617, Taiwan (China)

    2005-06-15

    To capture important physical properties of a spacetime we construct a new diagram, the card diagram, which accurately draws generalized Weyl spacetimes in arbitrary dimensions by encoding their global spacetime structure, singularities, horizons, and some aspects of causal structure including null infinity. Card diagrams draw only nontrivial directions providing a clearer picture of the geometric features of spacetimes as compared to Penrose diagrams, and can change continuously as a function of the geometric parameters. One of our main results is to describe how Weyl rods are traversable horizons and the entirety of the spacetime can be mapped out. We review Weyl techniques and as examples we systematically discuss properties of a variety of solutions including Kerr-Newman black holes, black rings, expanding bubbles, and recent spacelike-brane solutions. Families of solutions will share qualitatively similar cards. In addition we show how card diagrams not only capture information about a geometry but also its analytic continuations by providing a geometric picture of analytic continuation. Weyl techniques are generalized to higher dimensional charged solutions and applied to generate perturbations of bubble and S-brane solutions by Israel-Khan rods.

  8. Nuclear Power Plant Accidents

    MedlinePLUS

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

  9. Time- temperature- transformation- diagrams for DWPF projected glass compositions

    SciTech Connect

    Marra, S.L.; Andrews, M.K.; Cicero, C.A.

    1993-03-01

    The Department of Energy`s Waste Acceptance Product Specifications (WAPS) require that time-temperature-transformation diagrams be developed for each of the DWPF high-level waste glass compositions. This information will be useful in understanding the crystallization behavior during melter idling, accident scenarios, and storage. Simulated high level waste glass samples were annealed at temperatures varying from 400-1100{degrees}C for times varying from 45 minutes to 32 days. The glasses were characterized by x-ray diffraction to identify and quantify the crystalline phases present. The results were used to construct the diagrams.

  10. Scrutinizing UML Activity Diagrams

    NASA Astrophysics Data System (ADS)

    Al-Fedaghi, Sabah

    Building an information system involves two processes: conceptual modeling of the “real world domain” and designing the software system. Object-oriented methods and languages (e.g., UML) are typically used for describing the software system. For the system analysis process that produces the conceptual description, object-oriented techniques or semantics extensions are utilized. Specifically, UML activity diagrams are the “flow charts” of object-oriented conceptualization tools. This chapter proposes an alternative to UML activity diagrams through the development of a conceptual modeling methodology based on the notion of flow.

  11. Diblock copolymer phase diagram

    NSDL National Science Digital Library

    Iacovella, Christopher R.

    2006-11-20

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

  12. Flow diagram analysis of electrical fatalities in construction industry.

    PubMed

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

    2012-01-01

    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

  13. 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.

  14. Venn Diagrams and Logic

    NSDL National Science Digital Library

    2011-01-04

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

  15. Plagioclase Phase Diagram

    NSDL National Science Digital Library

    Dexter Perkins

    This is a short exercise aimed at evaluating whether students understand how to interpret the Ab-An phase diagram. If students know what is going on, it takes about 10 minutes to complete. This active learning exercise makes a good break from lecture. It is best done as a group activity.

  16. Understanding Network Diagrams.

    ERIC Educational Resources Information Center

    Waller, Robert

    A survey of a range of introductory university level textbooks in the social sciences found little use of network diagrams (NDs), i.e., graphic representations of processes, organizations, systems, and mechanisms. NDs can be viewed as a text/picture hybrid medium with titles and captions serving to qualify and identify the meaning and status of…

  17. Impulse-Momentum Diagrams

    ERIC Educational Resources Information Center

    Rosengrant, David

    2011-01-01

    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…

  18. An Introduction to Tree Diagrams

    NSDL National Science Digital Library

    Stu Cork

    2014-01-01

    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.

  19. Linking diagrams for free

    E-print Network

    Dominic J. D. Hughes

    2008-05-11

    Linking diagrams with path composition are ubiquitous, for example: Temperley-Lieb and Brauer monoids, Kelly-Laplaza graphs for compact closed categories, and Girard's multiplicative proof nets. We construct the category Link=Span(iRel), where iRel is the category of injective relations (reversed partial functions) and show that the aforementioned linkings, as well as Jones-Martin partition monoids, reside inside Link. Path composition, including collection of loops, is by pullback. Link contains the free compact closed category on a self-dual object (hence also the looped Brauer and Temperly-Lieb monoids), and generalises partition monoids with partiality (vertices in no partition) and empty- and infinite partitions. Thus we obtain conventional linking/partition diagrams and their composition "for free", from iRel.

  20. Hertzsprung-Russell Diagram

    NSDL National Science Digital Library

    Hackworth, Martin

    Authored by Martin Hackworth of Idaho State University, This lab asks students to construct two Hertzsprung-Russell diagrams, one for the Pleiades Cluster and the other for the Trapezium Cluster. Students should then to be able to recognize the evolution process of all stars depending on their mass. The page features objectives, equipment, discussion, procedure, and exercises. The lesson plan is outlined in an understandable format for translation into almost any curriculum. The resource is available in a pdf format.

  1. UML class diagram metrics tool

    Microsoft Academic Search

    Moheb R. Girgis; T. M. Mahmoud; Rehab R. Nour

    2009-01-01

    Many of the object-oriented (OO) metrics that have been proposed over the last decade can be applied to measure internal quality attributes of class diagrams. This paper describes a tool that automates the computation of the important metrics that are applicable to the UML class diagrams. The tool collects information by parsing the XMI format of the class diagram to

  2. On web diagrams Jun Murakami

    E-print Network

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

  3. Modeling process flow using diagrams

    Microsoft Academic Search

    Benjamin Kemper; Jeroen de Mast; Michel Mandjes

    2010-01-01

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

  4. Nuclear criticality accidents.

    PubMed

    Smith, D R

    1991-01-01

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

  5. Laser accidents: Being Prepared

    SciTech Connect

    Barat, K

    2003-01-24

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

  6. LES ACCIDENTS DE DECOMPRESSION

    E-print Network

    Jacquet, Stéphan

    LES ACCIDENTS DE DECOMPRESSION LES EFFETS DE L'IMMERSION SUR LE PLONGEUR LES ACCIDENTS DE DECOMPRESSION LE TRAITEMENT IMMEDIAT : POURQUOI ? CONCLUSION #12;EFFETS DE L'IMMERSION SUR LE PLONGEUR : 1- SUR DECOMPRESSION : 1- LES LOIS PHYSIQUES : RAPPELS 2- LA MALADIE DE DECOMPRESSION 3- LES FORMES CLINIQUES DES ADD

  7. Civil aircraft accident investigation.

    PubMed

    Haines, Daniel

    2013-01-01

    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

  8. The Tokaimura Nuclear Accident

    NSDL National Science Digital Library

    Michael E. Ryan

    2001-09-01

    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

  9. Traffic dynamics around weaving section influenced by accident: Cellular automata approach

    NASA Astrophysics Data System (ADS)

    Kong, Lin-Peng; Li, Xin-Gang; Lam, William H. K.

    2015-07-01

    The weaving section, as a typical bottleneck, is one source of vehicle conflicts and an accident-prone area. Traffic accident will block lanes and the road capacity will be reduced. Several models have been established to study the dynamics around traffic bottlenecks. However, little attention has been paid to study the complex traffic dynamics influenced by the combined effects of bottleneck and accident. This paper presents a cellular automaton model to characterize accident-induced traffic behavior around the weaving section. Some effective control measures are proposed and verified for traffic management under accident condition. The total flux as a function of inflow rates, the phase diagrams, the spatial-temporal diagrams, and the density and velocity profiles are presented to analyze the impact of accident. It was shown that the proposed control measures for weaving traffic can improve the capacity of weaving section under both normal and accident conditions; the accidents occurring on median lane in the weaving section are more inclined to cause traffic jam and reduce road capacity; the capacity of weaving section will be greatly reduced when the accident happens downstream the weaving section.

  10. Warped penguin diagrams

    SciTech Connect

    Csaki, Csaba; Grossman, Yuval; Tanedo, Philip; Tsai, Yuhsin [Institute for High Energy Phenomenology, Newman Laboratory of Elementary Particle Physics, Cornell University, Ithaca, New York 14853 (United States)

    2011-04-01

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

  11. Impact decision support diagrams

    NASA Astrophysics Data System (ADS)

    Boslough, Mark

    2014-10-01

    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).

  12. Argument Diagramming: The Araucaria Project

    NASA Astrophysics Data System (ADS)

    Rowe, Glenn; Reed, Chris

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

  13. Persistence of airline accidents.

    PubMed

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

    2010-10-01

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

  14. Generating function for web diagrams

    E-print Network

    A. A. Vladimirov

    2014-09-06

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

  15. Program Synthesizes UML Sequence Diagrams

    NASA Technical Reports Server (NTRS)

    Barry, Matthew R.; Osborne, Richard N.

    2006-01-01

    A computer program called "Rational Sequence" generates Universal Modeling Language (UML) sequence diagrams of a target Java program running on a Java virtual machine (JVM). Rational Sequence thereby performs a reverse engineering function that aids in the design documentation of the target Java program. Whereas previously, the construction of sequence diagrams was a tedious manual process, Rational Sequence generates UML sequence diagrams automatically from the running Java code.

  16. FATAL ACCIDENT REPORTING SYSTEM (FARS)

    EPA Science Inventory

    The Fatal Accident Reporting System (FARS) database consist of three relational tables, containing data on automobile accidents on public U.S. roads that resulted in the death of one or more people within 30 days of the accident. Truck and trailer accidents are also included....

  17. Accidents Involving Handicapped Drivers.

    ERIC Educational Resources Information Center

    Negri, D. Barry; Ibison, Richard A.

    1979-01-01

    The article presents a brief overview of the history of driving by the handicapped, surveys the literature on the record of handicapped drivers and accidents, and relates a New York State study on the subject. (PHR)

  18. Accident resistant transport container

    DOEpatents

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

    1980-01-01

    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.

  19. Physiology Flow-Diagram Models

    NSDL National Science Digital Library

    PhD Sandra J Bruner (Polk Community College Biology)

    2005-10-04

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

  20. Perturbations to the Hubble diagram

    E-print Network

    Thomas Schucker; Ilhem ZouZou

    2005-11-17

    We compute the linear responses of the Hubble diagram to small scalar perturbations in the Robertson-Walker metric and to small peculiar velocities of emitter and receiver. We discuss the monotonicity constraint of the Hubble diagram in the light of these responses.

  1. Summarization of Diagrams in Documents

    Microsoft Academic Search

    Robert P. Futrelle

    1999-01-01

    Documents are composed of text and graphics. There is substantial work on automated text summarization but almost none on the automated summarization of graphics. Four examples of diagrams from the scientific literature are used to indicate the problems and possible solutions: a table of images, a flow chart, a set of x,y data plots, and a block diagram. Manual summaries

  2. Sets and the Venn Diagram

    NSDL National Science Digital Library

    2011-05-23

    This lesson is designed to introduce students to sets, terms used with sets, and Venn diagrams. This lesson provides links to discussions and activities related to sets and Venn diagrams as well as suggested ways to integrate them into the lesson. Finally, the lesson provides links to follow-up lessons designed for use in succession with the current one.

  3. Architecture flow diagrams under Teamwork

    Microsoft Academic Search

    Tom Nicinski

    1992-01-01

    The Teamwork CASE tool allows data flow diagrams (DFDs) to be maintained for structured analysis. Fermilab has extended Teamwork under UNIX 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.

  4. Time-Based Voronoi Diagram

    Microsoft Academic Search

    D. T. Lee; Chung-Shou Liao; Wei-Bung Wang

    We consider a variation of Voronoi diagram, or time-based Voronoi diagram, for a set S of points in the presence of transportation lines or highways in the plane. A shortest time-distance path from a query point to any given point in S is a path that takes the least travelling time. The travelling speeds and hence travelling times of the

  5. Accident management information needs

    SciTech Connect

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

    1990-04-01

    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.

  6. Transformations of triangle ladder diagrams

    E-print Network

    Igor Kondrashuk; Alvaro Vergara

    2010-02-13

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

  7. Helicopter accident survivability.

    PubMed

    Vyrnwy-Jones, P; Thornton, R

    1984-10-01

    Army Air Corps accident and fatality rates have now reached levels which compare favourably with data from other civilian and military sources. This improvement is the result of enhanced helicopter design and parallel progress in aircrew training. The introduction of new generations of turbine powered rotor craft has largely eliminated mechanical failure as the cause of accident. As a result 75% of Army Air Corps accidents are due to pilot error. This contribution is likely to increase in the future as the pilot's task is made more difficult by the incumberance of personal equipment. Methods whereby occupant protection and aircraft crashworthiness can be improved are reviewed and it is concluded that it would make sound economic sense to implement some of these well proven design features. PMID:6527344

  8. The Hertzsprung-Russell Diagram.

    ERIC Educational Resources Information Center

    Woodrow, Janice

    1991-01-01

    Describes a classroom use of the Hertzsprung-Russell diagram to infer not only the properties of a star but also the star's probable stage in evolution, life span, and age of the cluster in which it is located. (ZWH)

  9. Formulae and Flow-Diagrams

    ERIC Educational Resources Information Center

    Willson, William Wynne

    1977-01-01

    The author recommends the use of flow charting to help students understand the manipulation of algebraic formulae. He identifies some problems with flow charts and suggests an alternative method of constructing flow diagrams. (SD)

  10. Nuclear-station post-accident liquid-sampling system: developed by Duke Power Company

    SciTech Connect

    Burton, D.A.; Birch, M.L.; Orth, W.C.

    1981-01-01

    The accident at Three Mile Island showed that means must be provided to determine the radioactivity levels in high activity liquid and gaseous systems of a nuclear power plant without undue radiation exposure to personnel. The Duke Power Post Accident Liquid Sampling System provides the means for obtaining diluted liquid samples and diluted dissolved gas samples following a reactor accident involving substantial core damage. Their approach yields a straightforward engineering solution at a fraction of the cost of other systems. A description of the system, general design criteria, and color coded flow diagrams are included.

  11. Bringing class diagrams to life

    Microsoft Academic Search

    Luís Soares Barbosa; Sun Meng

    2010-01-01

    Research in formal methods emphasizes a fundamental interconnection between modeling, calculation and prototyping, made possible\\u000a by a common unambiguous, mathematical semantics. This paper, building on a broader research agenda on coalgebraic semantics\\u000a for Unified Modeling Language diagrams, concentrates on class diagrams and discusses how such a coalgebraic perspective can\\u000a be of use not only for formalizing their specification, but also

  12. Interpreting T-X Diagrams

    NSDL National Science Digital Library

    Dexter Perkins

    This short problem set works well as a group activity that can be completed in class. The purpose of the exercise is for students to begin to think about T-X phase diagrams and how they are interpreted. Along the way, students learn that text book authors sometimes make mistakes. The figure in the handout is from Winter's Petrology. But, Winter goofed and left some reactions off of the phase diagram.

  13. Changing Perceptions of Animated Diagrams

    Microsoft Academic Search

    Richard Lowe

    2006-01-01

    \\u000a While the educational effectiveness of static diagrams is underpinned by a long heritage of manipulating visuospatial characteristics\\u000a of the depicted content to improve explanatory power, no corresponding evolution has occurred regarding temporal manipulation\\u000a of animated diagrams. When complex dynamic subject matter is presented using animations that depict temporal information in\\u000a a behaviorally realistic manner, the perceptual properties of the display

  14. Transportation Accidents Involving Radioactive Materials

    MedlinePLUS

    ... withstand damage. What are the main dangers of transportation accidents involving radiation? The main dangers of transportation ... the transport container. http://emergency.cdc.gov/radiation TRANSPORTATION ACCIDENTS If you believe you have been exposed, ...

  15. Hypothetical Reactor Accident Study

    E-print Network

    for the accidents described are those given in WASH-1400. The analyses are based on the tesident population as given in a Typical BWR and in a typical PWR. Comparison with WASH-1400 by C F . Højerup 202 APPENDIX 3. Calculation

  16. Challenger accident after launch

    NASA Technical Reports Server (NTRS)

    1986-01-01

    These photographs of the Space Shuttle Challenger accident January 28, 1986 were taken by a 70mm tracking camera at UCS 15 south of Pad 39B, at 11:39:16.795 EST and 11:39:19.261 EST. The Kennedy Space Center alternative photo numbers are 108-KSC-86PC-149 and 151

  17. Challenger accident after launch

    NASA Technical Reports Server (NTRS)

    1986-01-01

    This photograph of the Space Shuttle Challenger accident January 28, 1986 was taken by a 70mm tracking camera at UCS 15 south of Pad 39B, at 11:39:40.061 est. Notice the smoke trails caused by flying debris. The Kennedy Space Center alternative photo number is 108-KSC-86PC-155.

  18. Challenger accident after launch

    NASA Technical Reports Server (NTRS)

    1986-01-01

    These photographs of the Space Shuttle Challenger accident January 28, 1986 was taken by a 70mm tracking camera at UCS 15 south of Pad 39B, at 11:39:28.161 EST and 11:39:29.094. Notice the smoke trails caused by flying debris (10177). The Kennedy Space Center alternative photo numbers are 108-KSC-86PC-152 and 153.

  19. Challenger accident after launch

    NASA Technical Reports Server (NTRS)

    1986-01-01

    This photograph of the Space Shuttle Challenger accident January 28, 1986 was taken by a 70mm tracking camera at UCS 15 south of Pad 39B, at 11:39:40.861 est. Notice the smoke trails caused by flying debris. The Kennedy Space Center alternative photo number is 108-KSC-86PC-156.

  20. Challenger accident after launch

    NASA Technical Reports Server (NTRS)

    1986-01-01

    This photograph of the Space Shuttle Challenger accident January 28, 1986 was taken by a 70mm tracking camera at UCS 15 south of Pad 39B, at 11:39:29.927 est. Notice the smoke trails caused by flying debris. The Kennedy Space Center alternative photo number is 108-KSC-86PC-154.

  1. Challenger accident after launch

    NASA Technical Reports Server (NTRS)

    1986-01-01

    This photograph of the Space Shuttle Challenger accident January 28, 1986 was taken by a 70mm tracking camera at UCS 15 south of Pad 39B, at 11:39:16.061 est. One of the solid rocket boosters can be seen at the top of the view. The Kennedy Space Center alternative photo number is 108-KSC-86PC-147.

  2. Stress, violations and accidents

    Microsoft Academic Search

    L. R. Hartley; J. El Hassani

    1994-01-01

    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

  3. [Drugs and occupational accident].

    PubMed

    Bratzke, H; Albers, C

    1996-02-01

    In a case of a fatal occupational accident (construction worker, fall from roof, urine test positive for cocaine and THC, e.g. cannabis) the question arised to what extent those drug-related occupational accidents occur. In the literature only few cases, mainly dealing with cannabis influence, have been reported, however, a higher number is suspected. Cocaine and other stimulating drugs (amphetamine) are more often used to increase physical fitness. By direct or indirect interference with vigilance these compounds may provoke accidents. Due to the lack of a legal basis proving of the influence of drugs at the working place is still very limited, although highly sensitive chemical-toxicological assay procedures are available to detect even the chronic abuse (in hair). In the general conditions of accident insurances a compensation is excluded when alcohol is involved, but drugs are not mentioned. It is indeed difficult to establish a concentration limit for drugs like that existing for alcohol (1.1%). In each case the assay of the drug involved and exact knowledge of its specific effects is in an essential prerequisite to prove the causal relationship. PMID:8852068

  4. A. Syntax Diagrams A-1 Appendix A

    E-print Network

    Brass, Stefan

    A. Syntax Diagrams A-1 Appendix A: Syntax Diagrams References: · Kathleen Jensen/Niklaus Wirth A is a short introduction to syntax diagrams. · Don Chamberlin: A Complete Guide to DB2 Universal Database. Morgan Kaufmann, 1998. Section 1.1.2 is a very quick introduction to syntax diagrams. Stefan Brass

  5. Automatically Assessing Graph-Based Diagrams

    ERIC Educational Resources Information Center

    Thomas, Pete; Smith, Neil; Waugh, Kevin

    2008-01-01

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

  6. CONTEXTEXPLOITING SHAPES FOR DIAGRAM TRANSFORMATION Frank Drewes

    E-print Network

    Drewes, Frank

    with editors for control flow diagrams, Nassi­Shneiderman diagrams, message sequence charts, state charts primitives, and reduces them to dia­ gram symbols, like assignments and branches in a control flow diagramCONTEXT­EXPLOITING SHAPES FOR DIAGRAM TRANSFORMATION Frank Drewes Institutionen fË?or Datavetenskap

  7. Applying STAMP in Accident Analysis

    NASA Technical Reports Server (NTRS)

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

    2003-01-01

    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.

  8. Aircraft accidents : method of analysis

    NASA Technical Reports Server (NTRS)

    1931-01-01

    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.

  9. NAAP HR Diagram Explorer 1/9 HR Diagram Student Guide

    E-print Network

    Farritor, Shane

    Name: NAAP ­ HR Diagram Explorer 1/9 HR Diagram ­ Student Guide Background Information Work through Orionis O9 Radius (R) Temperature (T) Luminosity (L) 1 1 1 2 1 9 1 1/2 #12;NAAP ­ HR Diagram Explorer 2 Diagram Explorer Open the HR Diagram Explorer. Begin by familiarizing yourself with the capabilities

  10. Accident prevention manual

    SciTech Connect

    Not Available

    1996-06-01

    Among our many common needs and goals are the safety and well-being of our families, ourselves, our fellow employees, and the continuing success of our organization. To these ends--minimizing human suffering and economic waste--the Bonneville Power Administration (BPA) Accident Prevention Program and this Accident Prevention Manual (APM) are dedicated. The BPA Accident Prevention Program is revised as necessary to ensure compliance with relevant Federal safety and health standards. The mandatory rules herein express minimum requirements for dealing with the principal hazards inherent in daily work activities. These and other written requirements, which neither can nor should provide complete coverage of all work situations, must be continually reinforced through the sound and mature safety judgments of all workers on each assigned task. The APM is divided into two distinct sections: (1) Rules, and (2) Switching and Clearance Procedure (Operating Bulletin No. 2). For added awareness, the life-or-death Safety Rules are captioned in red; both in the index and throughout the text.

  11. Dynamic programming and influence diagrams

    Microsoft Academic Search

    JOSEPH A. TATMAN; ROSS D. SHACHTER

    1990-01-01

    The concept of a super value node is developed to extend the theory of influence diagrams to allow dynamic programming to be performed within this graphical modeling framework. The operations necessary to exploit the presence of these nodes and efficiently analyze the models are developed. The key result is that by representing value function separability in the structure of the

  12. 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

  13. Causal diagrams for empirical research

    Microsoft Academic Search

    JUDEA PEARL

    1995-01-01

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

  14. Phase Diagrams for Sonoluminescing Bubbles

    Microsoft Academic Search

    Sascha Hilgenfeldt; Detlef Lohse; Michael P. Brenner

    1996-01-01

    Sound driven gas bubbles in water can emit light pulses. This phenomenon is called sonoluminescence (SL). Two different phases of single bubble SL have been proposed: diffusively stable and diffusively unstable SL. We present phase diagrams in the gas concentration vs forcing pressure state space and also in the ambient radius vs gas concentration and vs forcing pressure state spaces.

  15. Precipitation and the Sounding Diagram

    NSDL National Science Digital Library

    John Nielsen-Gammon

    1996-01-01

    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.

  16. Using influence diagrams for PERT

    Microsoft Academic Search

    A. Jenzarli

    1997-01-01

    Summary form only given. We describe a new method for explicit modeling of decisions that bear on activity times in a project. This method extends the PERT belief network (PBN) model to include decisions variables. The resulting network is called PERT Influence Diagram (PID). A PID is a PBN that includes decision variables, where arrows into decision nodes mean that

  17. Voronoi Diagrams and Spring Rain

    ERIC Educational Resources Information Center

    Perham, Arnold E.; Perham, Faustine L.

    2011-01-01

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

  18. Index of Animated Phase Diagrams

    NSDL National Science Digital Library

    Kenneth E Windom

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

  19. Concrete and Abstract Voronoi Diagrams

    Microsoft Academic Search

    Rolf Klein

    1989-01-01

    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

  20. Telesynergy V3 Wiring Diagram

    Cancer.gov

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

  1. Policy Specification Using Sequence Diagrams

    E-print Network

    Stølen, Ketil

    of Information Science and Media Studies and at the Faculty of Social Sciences at the Uni- versity of BergenPolicy Specification Using Sequence Diagrams Applied to Trust Management Bjørnar Solhaug which was funded by the Research Council of Norway. The ENFORCE project was a joint initiative between

  2. State diagrams of linear sequential machines

    E-print Network

    English, Linda Sue

    1977-01-01

    14 37 38 LIST OF FIGURFS FIGURE Page 1. State Diagram M . 2. Diagram of Example l. 3. Diagram of Example 2. 4. Diagram of Example 3. 5. State Diagram of a Linear Sequential Machine. 6. State Diagram of a Sequential Machine . 24 26 35 36.... A sequential machine N is a five-tuple &S, I, s, 6, x& where S is a set of states, I is a set of input symbols, A is a set of output symbols, s is the transition function, and ~ is the output function. A particular three-state machine h1=&S, I, a...

  3. Generation of powder compaction response diagrams

    SciTech Connect

    Matsumoto, R.L.K.

    1986-10-01

    The effect of elastic compliances in the testing system is shown to have a considerable influence on the compaction diagram generated via an automatic procedure. Proper accounting of this effect allows rapid and accurate diagrams to be made.

  4. The Butterfly Diagram Internal Structure

    NASA Astrophysics Data System (ADS)

    Ternullo, Maurizio

    2013-06-01

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

  5. Reasoning on UML class diagrams

    Microsoft Academic Search

    Daniela Berardi; Diego Calvanese; Giuseppe De Giacomo

    2005-01-01

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

  6. Reasoning on UML Class Diagrams

    Microsoft Academic Search

    Daniela Berardi; Andrea Cal; Diego Calvanese; Giuseppe De Giacomo

    2003-01-01

    UML is the de-facto standard formalism for software design and analysis. To support the design of large-scale industrial applications, sophisticated CASE tools are available on the market, that provide a user-friendly environment for editing, storing, and accessing multiple UML diagrams. It would be highly desirable to equip such CASE tools with automated reasoning capabilities in order to detect relevant formal

  7. T-X Phase Diagrams

    NSDL National Science Digital Library

    Dexter Perkins

    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.

  8. Phase Diagrams and Chemographic Projections

    NSDL National Science Digital Library

    Dexter Perkins

    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.

  9. Online Diagnosis Using Influence Diagrams

    Microsoft Academic Search

    Baldramino Morales Sánchez; Pablo H. Ibargüengoytia

    2004-01-01

    \\u000a This paper presents the utilization of influence diagrams in the diagnosis of industrial processes. The diagnosis in this\\u000a context signifies the early detection of abnormal behavior, and the selection of the best recommendation for the operator\\u000a in order to correct the problem or minimize the effects. A software architecture is presented, based on the Elvira package, including the connection with

  10. Algorithm Discovery with Venn Diagrams

    NSDL National Science Digital Library

    2011-05-23

    This lesson is designed to develop students' abilities to create algorithms or a set of directions to solve a problem. In this lesson, the problem is to determine the rules in a Venn diagram. This lesson provides links to discussions and activities related to the topic as well as suggested ways to integrate them into the lesson. Finally, the lesson provides links to follow-up lessons designed for use in succession with the current one.

  11. INCONEL 718: A solidification diagram

    NASA Astrophysics Data System (ADS)

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

    1989-10-01

    As part of a program studying weldability of Ni-base superalloys, results of an integrated analytical approach are used to generate a constitution diagram for INCONEL 718* in the temperature range associated with solidification. Differential thermal analysis of wrought material and optical and scanning electron microscopy, electron probe microanalysis, and analytical electron microscopy of gas tungsten arc welds are used in conjunction with solidification theory to generate data points for this diagram. The important features of the diagram are an austenite (?)/Laves phase eutectic which occurs at ?19.1 wt pct Nb between austenite containing ?9.3 wt pct Nb and a Laves phase which contains ?22.4 wt pct Nb. The distribution coefficient for Nb was found to be ?0.5. The solidification sequence of INCONEL 718 was found to be (1) proeutectic ?, followed by (2) a ?/NbC eutectic at ?1250°C, followed by (3) continued ? solidification, followed by (4) a ?/Laves phase eutectic at ?1200°C. An estimate of the volume fraction eutectic is made using the Scheil solidification model, and the fraction of each phase in the eutectic is calculated via the lever rule. These are compared with experimentally determined values and found to be in good agreement.

  12. 2IW05 Software Specification Class Diagrams

    E-print Network

    Mousavi, Mohammad

    2IW05 ­ Software Specification Class Diagrams Mohammad Mousavi Formal Systems Analysis (FSA) Model-Driven Software Engineering Department of Computer Science TU/Eindhoven September 7, 2012 #12;News 1 Send me specification: 1 Class diagram: data types, their operations and dependencies (extended ERDs) 2 Package diagram

  13. On Class Diagrams, Crossings and Metrics

    Microsoft Academic Search

    Holger Eichelberger

    2005-01-01

    UML class diagrams, internationally specified and widely used in software engineering, are a great challenge in automatic drawing of graphs. Due to the complex nature of UML class diagrams and the requirements of software engineers, who need to read these diagrams, layout rules and algo- rithms for general graphs can not be applied without adaptions, extensions and modifications. In this

  14. Diagrams in Biology1 Laura Perini

    E-print Network

    McBurney, Peter

    , as biologists plan experiments with flow charts, and draw models to represent hypotheses for consideration representational features of diagrams. Analysis of the relation between the forms and contents of diagrams1 Diagrams in Biology1 Laura Perini Department of Philosophy Pomona College Abstract Biologists

  15. Semantics of the Domain of Flow Diagrams

    Microsoft Academic Search

    John C. Reynolds

    1977-01-01

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

  16. A Layout Algorithm for Data Flow Diagrams

    Microsoft Academic Search

    Carlo Batini; Enrico Nardelli; Roberto Tamassia

    1986-01-01

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

  17. A Formal Semantics of Data Flow Diagrams

    Microsoft Academic Search

    Peter Gorm Larsen; Nico Plat; Hans Toetenel

    1994-01-01

    This document presents a full version of the formal semantics of data ow diagrams reported in [Larsen&93]. Data Flow Diagrams are used in Structured Analysis and are based on an abstract model for data flow transformations. The semantics consists of a collection of VDM functions, transforming an abstract syntax representation of a data flow diagram into an abstract syntax representation

  18. Retrieving Information from Data Flow Diagrams

    Microsoft Academic Search

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

    1995-01-01

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

  19. Probability of spent fuel transportation accidents

    SciTech Connect

    McClure, J. D.

    1981-07-01

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

  20. 48 CFR 836.513 - Accident prevention.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

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

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

    ERIC Educational Resources Information Center

    Py, Dominique; Auxepaules, Ludovic; Alonso, Mathilde

    2013-01-01

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

  2. First Responders and Criticality Accidents

    SciTech Connect

    Valerie L. Putman; Douglas M. Minnema

    2005-11-01

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

  3. Cernavoda CANDU severe accident evaluation

    Microsoft Academic Search

    Gheorghe Negutt; Adrian Marin

    1997-01-01

    The papers present the activities dedicated to Romania Cernavoda Nuclear Power Plant first CANDU Unit severe accident evaluation. This activity is part of more general PSA assessment activities. CANDU specific safety features are calandria moderator and calandria vault water capabilities to remove the residual heat in the case of severe accidents, when the conventional heat sinks are no more available.

  4. EDMS 894435 INTERNAL ACCIDENT REPORT

    E-print Network

    McDonald, Kirk

    .Lettry/AB-ATB ............................................................................................................................................................................. Information on the above accident 1 Description of the accident (summary of facts & circumstances) As foreseen in the overall schedule of the experiment, the emptying of the mercury inventory from the experimental equipment in an overflow. This overflow allowed mercury spillage into the surrounding retention containers and partly

  5. Industrial accidents triggered by lightning

    Microsoft Academic Search

    Elisabetta Renni; Elisabeth Krausmann; Valerio Cozzani

    2010-01-01

    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

  6. German aircraft accident statistics, 1930

    NASA Technical Reports Server (NTRS)

    Weitzmann, Ludwig

    1932-01-01

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

  7. Industrial accidents triggered by lightning.

    PubMed

    Renni, Elisabetta; Krausmann, Elisabeth; Cozzani, Valerio

    2010-12-15

    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

  8. Origin and use of crystallization phase diagrams.

    PubMed

    Rupp, Bernhard

    2015-03-01

    Crystallization phase diagrams are frequently used to conceptualize the phase relations and also the processes taking place during the crystallization of macromolecules. While a great deal of freedom is given in crystallization phase diagrams owing to a lack of specific knowledge about the actual phase boundaries and phase equilibria, crucial fundamental features of phase diagrams can be derived from thermodynamic first principles. Consequently, there are limits to what can be reasonably displayed in a phase diagram, and imagination may start to conflict with thermodynamic realities. Here, the commonly used `crystallization phase diagrams' are derived from thermodynamic excess properties and their limitations and appropriate use is discussed. PMID:25760697

  9. [Prevention of bicycle accidents].

    PubMed

    Zwipp, H; Barthel, P; Bönninger, J; Bürkle, H; Hagemeister, C; Hannawald, L; Huhn, R; Kühn, M; Liers, H; Maier, R; Otte, D; Prokop, G; Seeck, A; Sturm, J; Unger, T

    2015-04-01

    For a very precise analysis of all injured bicyclists in Germany it would be important to have definitions for "severely injured", "seriously injured" and "critically injured". By this, e.g., two-thirds of surgically treated bicyclists who are not registered by the police could become available for a general analysis. Elderly bicyclists (>?60 years) are a minority (10?%) but represent a majority (50?%) of all fatalities. They profit most by wearing a helmet and would be less injured by using special bicycle bags, switching on their hearing aids and following all traffic rules. E-bikes are used more and more (145?% more in 2012 vs. 2011) with 600,000 at the end of 2011 and are increasingly involved in accidents but still have a lack of legislation. So even for pedelecs 45 with 500?W and a possible speed of 45?km/h there is still no legislative demand for the use of a protecting helmet. 96?% of all injured cyclists in Germany had more than 0.5?‰ alcohol in their blood, 86?% more than 1.1?‰ and 59?% more than 1.7?‰. Fatalities are seen in 24.2?% of cases without any collision partner. Therefore the ADFC calls for a limit of 1.1?‰. Some virtual studies conclude that integrated sensors in bicycle helmets which would interact with sensors in cars could prevent collisions or reduce the severity of injury by stopping the cars automatically. Integrated sensors in cars with opening angles of 180° enable about 93?% of all bicyclists to be detected leading to a high rate of injury avoidance and/or mitigation. Hanging lamps reduce with 35?% significantly bicycle accidents for children, traffic education for children and special trainings for elderly bicyclists are also recommended as prevention tools. As long as helmet use for bicyclists in Germany rates only 9?% on average and legislative orders for using a helmet will not be in force in the near future, coming up campaigns seem to be necessary to be promoted by the Deutscher Verkehrssicherheitsrat as, e.g., "Helmets are cool". Also, spots in TV should be broadcasted like "The 7th sense" or "Traffic compass", which were warning car drivers many years ago of moments of danger but now they could be used to warn bicyclists of life-threatening situations in traffic. PMID:25874397

  10. Training rail accident investigators in UK

    Microsoft Academic Search

    Stephen Watson

    2004-01-01

    In the UK a number of high severity rail accidents, combined with structural change in the rail industry led to the need for revised accident investigation procedures. The revised procedure addressed identified issues with accident investigation, but to ensure maximum benefit in terms of identification of underlying causes of accidents and the production of good recommendations, training for rail industry

  11. A layout algorithm for data flow diagrams

    SciTech Connect

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

    1986-04-01

    A layout algorithm is presented that allows the automatic drawing of data flow diagrams, a diagrammatic representation widely used in the functional analysis of information systems. A grid standard is defined for such diagrams, and aesthetics for a good readability are identified. The layout algorithm receives as input an abstract graph, specifying connectivity relations between the elements of the diagram, and produces as output a corresponding diagram according to the aesthetics. The basic strategy is to build incrementally the layout; first, a good topology is constructed with few crossings between edges; subsequently, the shape of the diagram is determined in terms of angles appearing along edges; and finally, dimensions are given to the graph, obtaining a grid skeleton for the diagram.

  12. Aircraft accidents : method of analysis

    NASA Technical Reports Server (NTRS)

    1929-01-01

    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)

  13. Columbia Accident Probe Widens

    NASA Technical Reports Server (NTRS)

    Covault, Craig

    2003-01-01

    The Columbia Accident Investigation Board has identified about a dozen shuttle program safety concerns it will address in its final report, in addition to foam shedding from the Lockheed Martin external tank-believed by many board members to be the direct cause for the loss of Columbia and her crew. As new evidence narrows the location of Columbia's left-wing breach to a lower corner of reinforced carbon-carbon (RCC) Panel 8 and its adjoining T-seal, the board is broadening its penetration of other shuttle safety issues. As the board works in Houston, United Space Alliance technicians here at Kennedy last week sent the first six of 22 RCC panels from the orbiter Atlantis left wing to Vought Aircraft Industries Inc. in Dallas for extensive testing to assess their integrity. The move is a key step toward both returning the shuttle to flight with Atlantis and obtaining more data on RCC panels subjected to fewer flights, and less exposure to the weather, than the older panels used on Columbia.

  14. An Aircraft Accident Investigation: Revisited

    Microsoft Academic Search

    S. K. Bhaumik

    2008-01-01

    Aircraft accidents are usually complex, and hence their investigation requires expertise from several fields. The challenge\\u000a for an investigating team is to analyze the bits and pieces of information gathered in the course of the investigation through\\u000a background information, interrogation, and material evidence and stitch them into a descriptive picture to arrive at the possible\\u000a cause(s) of the accident. During

  15. Spine Immobilizer for Accident Victims

    NASA Technical Reports Server (NTRS)

    Vykukal, H. C.; Lampson, K.

    1983-01-01

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

  16. Nonverbal Poetry: Family Life-Space Diagrams

    Microsoft Academic Search

    Donald R. Bardill

    2001-01-01

    The purpose of this article is to examine life-space diagrams as a form of nonverbal poetry. Family life-space diagrams, by their very nature, are a nonverbal blend of lyrical, narrative, and dramatic poetry. The life-space diagram taps personal feelings, tells a story, and characterizes a particular life situation. The human memory process, with its multilevel consciousness, provides the basis for

  17. Variable stars across the observational HR diagram

    Microsoft Academic Search

    Laurent Eyer; Nami Mowlavi

    2008-01-01

    An overview of pulsating variable stars across the observational Hertzprung-Russel (HR) diagram is presented, together with a summary of their global properties. The HR diagram is presented with a third colour-coded dimension, visualizing the fraction of variable, the amplitude of variability or the period of variability. The distribution of variable stars in the other observational diagrams, such as the Period-Amplitude

  18. Object Flow Definition for Refined Activity Diagrams

    Microsoft Academic Search

    Stefan Jurack; Leen Lambers; Katharina Mehner; Gabriele Taentzer; Gerd Wierse

    2009-01-01

    Activity diagrams are a well-known means to model the control flow of system behavior. Their expressiveness can be enhanced\\u000a by using their object flow notation. In addition, we refine activities by pairs of pre- and post-conditions formulated by\\u000a interrelated object diagrams. To define a clear semantics for refined activity diagrams with object flow, we use a graph transformation\\u000a approach. Control

  19. Variable stars across the observational HR diagram

    E-print Network

    Laurent Eyer; Nami Mowlavi

    2007-12-21

    An overview of pulsating variable stars across the observational Hertzprung-Russel (HR) diagram is presented, together with a summary of their global properties. The HR diagram is presented with a third colour-coded dimension, visualizing the fraction of variable, the amplitude of variability or the period of variability. The distribution of variable stars in the other observational diagrams, such as the Period-Amplitude diagram, is also presented. Some of the progresses performed in the field of variable stars during the last decade are briefly summarized, and future projects that will improve our knowledge of variable stars are mentioned.

  20. Hofstadter Butterfly Diagram in Noncommutative Space

    E-print Network

    Hidenori Takahashi; Masanori Yamanaka

    2006-06-23

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

  1. Phase diagram of ammonium nitrate

    NASA Astrophysics Data System (ADS)

    Dunuwille, Mihindra; Yoo, Choong-Shik

    2013-12-01

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

  2. Hubble's diagram and cosmic expansion

    NASA Astrophysics Data System (ADS)

    Kirshner, Robert P.

    2004-01-01

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

  3. [Accidents of fulguration].

    PubMed

    Virenque, C; Laguerre, J

    1976-01-01

    Fulguration, first electric accident in which the man was a victim, is to day better known. A clap of thunder is decomposed in two elements: lightning, and thunder. Lightning is caused by an electrical discharge, either within a cloud, or between two clouds, or, above all, between a cloud and the surface of the ground. Experimental equipments owned by the French Electricity Company and by the Atomic Energy Commission, have allowed to photograph lightnings and to measure certain physical characteristics (Intensity variable between 25 to 100 kA, voltage variable between 20 to 1 000 kV). The frequency of storms was learned: the isokeraunic level, in France, is about 20, meaning that thunder is heard twenty days during one year. Man may be stricken by thunder by direct hit, by sudden bursting, by earth current, or through various conductors. The electric charge which reached him may go to the earth directly by contact with the ground or may dissipate in the air through a bony promontory (elbow). The total number of victims, "wounded" or deceased, is not now known by statistics. Death comes by insulation breakdown of one of several anatomic cephalic formations: skull, meninx, brain. Many various lesions may happen in survivors: loss of consciousness, more or less long, sensorial or motion deficiencies. All these signs are momentary and generally reversible. Besides one may observe much more intense lesions on the skin: burns and, over all, characteristic aborescence (skin effect by high frequency current). The heart is protected, contrarily to what happens with industrial electrocution. The curative treatment is merely symptomatic : reanimation, surgery for burns or associated traumatic lesions. A prevention is researched to help the lonely man, in the country or in the mountains in the houses (lightning conductor, Faraday cage), in vehicles (aircraft, cars, ships). The mysterious and unforseeable character of lightning still stays, leaving a door opened for numerous investigations. PMID:1008283

  4. Accident Tolerant Fuel Analysis

    SciTech Connect

    Curtis Smith; Heather Chichester; Jesse Johns; Melissa Teague; Michael Tonks; Robert Youngblood

    2014-09-01

    Safety is central to the design, licensing, operation, and economics of Nuclear Power Plants (NPPs). Consequently, the ability to better characterize and quantify safety margin holds the key to improved decision making about light water reactor design, operation, and plant life extension. A systematic approach to characterization of safety margins and the subsequent margins management options represents a vital input to the licensee and regulatory analysis and decision making that will be involved. The purpose of the Risk Informed Safety Margin Characterization (RISMC) Pathway research and development (R&D) is to support plant decisions for risk-informed margins management by improving economics and reliability, and sustaining safety, of current NPPs. Goals of the RISMC Pathway are twofold: (1) Develop and demonstrate a risk-assessment method coupled to safety margin quantification that can be used by NPP decision makers as part of their margin recovery strategies. (2) Create an advanced “RISMC toolkit” that enables more accurate representation of NPP safety margin. In order to carry out the R&D needed for the Pathway, the Idaho National Laboratory is performing a series of case studies that will explore methods- and tools-development issues, in addition to being of current interest in their own right. One such study is a comparative analysis of safety margins of plants using different fuel cladding types: specifically, a comparison between current-technology Zircaloy cladding and a notional “accident-tolerant” (e.g., SiC-based) cladding. The present report begins the process of applying capabilities that are still under development to the problem of assessing new fuel designs. The approach and lessons learned from this case study will be included in future Technical Basis Guides produced by the RISMC Pathway. These guides will be the mechanism for developing the specifications for RISMC tools and for defining how plant decision makers should propose and evaluate margin recovery strategies.

  5. ACCIDENT TOLERANT FUEL ANALYSIS

    SciTech Connect

    Smith, Curtis [Idaho National Laboratory; Chichester, Heather [Idaho National Laboratory; Johns, Jesse [Texas A& M University; Teague, Melissa [Idaho National Laboratory; Tonks, Michael Idaho National Laboratory; Youngblood, Robert [Idaho National Laboratory

    2014-09-01

    Safety is central to the design, licensing, operation, and economics of Nuclear Power Plants (NPPs). Consequently, the ability to better characterize and quantify safety margin holds the key to improved decision making about light water reactor design, operation, and plant life extension. A systematic approach to characterization of safety margins and the subsequent margins management options represents a vital input to the licensee and regulatory analysis and decision making that will be involved. The purpose of the Risk Informed Safety Margin Characterization (RISMC) Pathway research and development (R&D) is to support plant decisions for risk-informed margins management by improving economics and reliability, and sustaining safety, of current NPPs. Goals of the RISMC Pathway are twofold: (1) Develop and demonstrate a risk-assessment method coupled to safety margin quantification that can be used by NPP decision makers as part of their margin recovery strategies. (2) Create an advanced “RISMC toolkit” that enables more accurate representation of NPP safety margin. In order to carry out the R&D needed for the Pathway, the Idaho National Laboratory is performing a series of case studies that will explore methods- and tools-development issues, in addition to being of current interest in their own right. One such study is a comparative analysis of safety margins of plants using different fuel cladding types: specifically, a comparison between current-technology Zircaloy cladding and a notional “accident-tolerant” (e.g., SiC-based) cladding. The present report begins the process of applying capabilities that are still under development to the problem of assessing new fuel designs. The approach and lessons learned from this case study will be included in future Technical Basis Guides produced by the RISMC Pathway. These guides will be the mechanism for developing the specifications for RISMC tools and for defining how plant decision makers should propose and evaluate margin recovery strategies.

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

    SciTech Connect

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

    1998-11-01

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

  7. A tutorial on flow diagrams: A tool for developing the structure of multicomponent phase diagrams

    Microsoft Academic Search

    R. G. Connell

    1994-01-01

    The tabular form of multiphase equilibria in temperature- or pressure-ordered sequence, often referred to as flow diagrams,\\u000a shows the interrelations that exist among the various types or classes of equilibria in a system. These interrelations establish\\u000a the structures of the various forms of phase diagrams. Flow diagrams have been used to simplify the presentation of complex\\u000a ternary phase diagrams. However,

  8. Labeled floor diagrams for plane curves

    Microsoft Academic Search

    Sergey Fomin; Grigory Mikhalkin

    2009-01-01

    Floor diagrams are a class of weighted oriented graphs introduced by E. Brugalle and the second author. Tropical geometry arguments lead to combinatorial descriptions of (ordinary and relative) Gromov-Witten invariants of projective spaces in terms of floor diagrams and their generalizations. In a number of cases, these descriptions can be used to obtain explicit (direct or recursive) formulas for the

  9. Empirical Validation of Class Diagram Metrics

    Microsoft Academic Search

    Marcela Genero; Mario Piattini; Coral Calero

    2002-01-01

    As a key early artefact in the development of OO software, the quality of class diagrams is crucial for all later design work and could be a major determinant for the quality of the software product that is finally delivered. Quantitative measurement instruments are useful to assess class diagram quality in an objective way, thus avoiding bias in the quality

  10. Activity Diagrams Patterns for Modeling Business Processes

    E-print Network

    André, Étienne

    on Software Engineering Research, Management and Applications (SERA 2013). The final publication is available consider in this paper the UML since it offers also many other diagrams (classes, state ma- chine, etc so as to build complex activity diagrams. Our ap- proach also takes classes into account. We have

  11. Timing Diagrams: Formalization and Algorithmic Verification

    E-print Network

    Fisler, Kathryn

    generated by B¨uchi automata in timing diagram languages is decidable. The result relies on a correlation foundation for both reasoning and theoretical analyses. This paper presents a timing dia­ gram logicTiming Diagrams: Formalization and Algorithmic Verification Kathi Fisler \\Lambda Department

  12. DECISION DIAGRAMS AND PASS TRANSISTOR LOGIC SYNTHESIS

    E-print Network

    De Micheli, Giovanni

    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

  13. Resummation of Cactus Diagrams in Lattice QCD

    E-print Network

    H. Panagopoulos; E. Vicari

    1998-06-08

    We show how to perform a resummation, to all orders in perturbation theory, of a certain class of gauge invariant diagrams in Lattice QCD. These diagrams are often largely responsible for lattice artifacts. Our resummation leads to an improved perturbative expansion. Applied to a number of cases of interest, this expansion yields results remarkably close to corresponding nonperturbative estimates.

  14. THE QCD PHASE DIAGRAM AT FINITE DENSITY.

    SciTech Connect

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

    2005-07-25

    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.

  15. Penrose diagram for a transient black hole

    Microsoft Academic Search

    James Lindesayand; Paul Sheldon

    2010-01-01

    A Penrose diagram is constructed for a spatially coherent black hole that smoothly begins an accretion, and then excretes symmetrically as measured by a distant observer, with the initial and final states described by a metric of the Minkowski form. Coordinate curves on the diagram are computationally derived. Causal relationships between spacetime regions are briefly discussed. The life cycle of

  16. Building Path Diagrams for Multilevel Models

    ERIC Educational Resources Information Center

    Curran, Patrick J.; Bauer, Daniel J.

    2007-01-01

    Multilevel models have come to play an increasingly important role in many areas of social science research. However, in contrast to other modeling strategies, there is currently no widely used approach for graphically diagramming multilevel models. Ideally, such diagrams would serve two functions: to provide a formal structure for deriving the…

  17. Formalizing Spider Diagrams Joseph (Yossi) Gil

    E-print Network

    Kent, University of

    ]. The Swiss mathemati- cian Leonhard Euler (1707-1783) introduced the notation we now call Euler circles (or- lar and intuitive Venn diagrams and Euler circles. The language design emphasized scalability Euler diagrams) [1] to illus- trate relations between sets. This notation uses the topo- logical

  18. Simplifying computation of dynamic influence diagrams

    Microsoft Academic Search

    Hong-Liang Yao; Hao Wang; You-Sheng Zhang; Xue-Gang Hu; Bao-Fu Fang

    2004-01-01

    Influence diagrams (EDs) are based on Bayesian networks (BNs) and decision theory, and they are powerful tools for representing and processing problems of agents. An approach of decomposition and incorporation is developed to solve problems of multi-agent system based on influence diagrams and dynamic Bayesian networks (DBNs) that is intractable for exact calculation. In additional, we discuss realizing decision of

  19. Abstract Voronoi Diagrams Revisited Elmar Langetepe

    E-print Network

    Klein, Rolf

    bisectors have infinitely many intersections, so that it was not covered by the existing AVD theory Voronoi Diagrams (AVDs) were introduced by the first author in [20], as a unifying concept for both, structure theory and algorithmic computation. The basic observation behind AVDs was that Voronoi diagrams

  20. A Formal Semantics of Data Flow Diagrams

    Microsoft Academic Search

    semantics Abstract. This paper presents a formal semantics of data flow diagrams as used in Structured Analysis, based on an abstract model for data flow transformations. The semantics consists of a collection of VDM functions, transforming an abstract syntax representation of a data flow diagram into an abstract syntax representation of a VDM specification. Since this transformation is executable, it

  1. Local helioseismology using ring diagram analysis

    Microsoft Academic Search

    H. M. Antia; S. Basu

    2007-01-01

    Ring diagram analysis is an extension of global helioseismology that is applied to small areas on the Sun. It can be used to infer the horizontal components of large scale flows as well as the structure, and variations thereof, in the outer convection zone. We describe below the ring-diagram analysis technique, and some results obtained using this technique.

  2. Architecture flow diagrams under teamwork reg sign

    Microsoft Academic Search

    Nicinski

    1992-01-01

    The Teamwork CASE tool allows Data Flow Diagrams (DFDs) to be maintained for structured analysis. Fermilab has extended teamwork under UNIX{trademark} to permit Hatley and Pirbhai Architecture Flow Diagrams (AFDs) to be associated with DFDs and subsequently maintained. This extension, called TWKAFD, allows a user to open an AFD, graphically edit it, and replace it into a TWKAFD maintained library.

  3. HMI ring diagram analysis II. Data products

    Microsoft Academic Search

    R. S. Bogart; C. Baldner; S. Basu; D. A. Haber; M. C. Rabello-Soares

    2011-01-01

    The combination of high resolution, spatial coverage, and continuity of photospheric Doppler and other data from HMI has allowed us to embark on a program of systematic exploration of solar subsurface flows and thermal structure variations using the technique of ring-diagram analysis on an unprecedented scale. There are two ring-diagrams pipelines, as described in [1]. In this paper we discuss

  4. Chord Diagrams and Coxeter Links Eriko Hironaka

    E-print Network

    Hironaka, Eriko

    Chord Diagrams and Coxeter Links Eriko Hironaka April 23, 2003 Abstract This paper presents a construction of #12;bered links (K; #6;) out of chord diagrams L. Let be the incidence graph of L. Under; S). Lehmer's problem is solved for the monodromy of these Coxeter links. 1 1 Introduction A chord

  5. Chord Diagrams and Coxeter Links Eriko Hironaka

    E-print Network

    Aluffi, Paolo

    Chord Diagrams and Coxeter Links Eriko Hironaka February 28, 2003 Abstract This paper presents a construction of #12;bered links (K; #6;) out of chord diagrams L. Let be the incidence graph of L. Under; S). Lehmer's problem is solved for the monodromy of these Coxeter links. 1 1 Introduction A chord

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

    NASA Technical Reports Server (NTRS)

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

    2012-01-01

    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.

  7. Reading fitness landscape diagrams through HSAB concepts

    NASA Astrophysics Data System (ADS)

    Vigneresse, Jean-Louis

    2014-10-01

    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.

  8. Phase diagram of ammonium nitrate

    SciTech Connect

    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

    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.

  9. The morphological diagram of spinels

    SciTech Connect

    Ziolkowski, J. [Institute of Catalysis and Surface Chemistry, Krakow (Poland)] [Institute of Catalysis and Surface Chemistry, Krakow (Poland)

    1996-02-01

    Catalytic anisotropy in mild oxidation reactions results from the varying activity of different crystal faces. Here, spinels exposing (100), (110), and (111) faces have been considered and their Curie-Wulff plots have been drawn, admitting that the relative G(hkl) surface free energies may change in a wide range as a function of composition, inversion, and segregation degree. The normalized free surface energies are defined as A = G(100)/G(111), B = G(110)/G(111), and C = G(111)/G(111) = 1 = const. This made it possible to construct bidimensional morphological diagrams (morphology = f(A,B) at C = const) in the exposed-face-type, solid-type, and exposure-percentage versions. Eleven morphological habits of grains have been identified, including (100)-cube, (110)-dodecahedron, (111)-hexagons, 18-hedron, 20-hedron, and up to 26-hedra bordered with (i) 6 (100)-octagons, 12 (110)-rectangles, and 8 (111)-hexagons, (ii) 6 (100)-squares, 12 (110)-rectangles, and 8 (111)-triangles, or (iii) 6 (100)-squares, 12 (110)-octagons, and 8 (100)-triangles. The analysis is valid for all compounds crystallizing in the cubic system and preferentially exposing the three enumerated faces.

  10. Towards the QCD phase diagram

    E-print Network

    Philippe de Forcrand; Owe Philipsen

    2006-11-22

    We summarize our recent results on the phase diagram of QCD with N_f=2+1 quark flavors, as a function of temperature T and quark chemical potential \\mu. Using staggered fermions, lattices with temporal extent N_t=4, and the exact RHMC algorithm, we first determine the critical line in the quark mass plane (m_{u,d},m_s) where the finite temperature transition at \\mu=0 is second order. We confirm that the physical point lies on the crossover side of this line. Our data are consistent with a tricritical point at (m_{u,d},m_s) = (0,\\sim 500) MeV. Then, using an imaginary chemical potential, we determine in which direction this second-order line moves as the chemical potential is turned on. Contrary to standard expectations, we find that the region of first-order transitions shrinks in the presence of a chemical potential, which is inconsistent with the presence of a QCD critical point at small chemical potential. The emphasis is put on clarifying the translation of our results from lattice to physical units, and on discussing the apparent contradiction of our findings with earlier lattice studies.

  11. Investigation of the Challenger Accident

    NASA Technical Reports Server (NTRS)

    1986-01-01

    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.

  12. Severe accident analysis using dynamic accident progression event trees

    Microsoft Academic Search

    Aram P. Hakobyan

    2006-01-01

    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

  13. The amplituhedron from momentum twistor diagrams

    NASA Astrophysics Data System (ADS)

    Bai, Yuntao; He, Song

    2015-02-01

    We propose a new diagrammatic formulation of the all-loop scattering amplitudes/Wilson loops in planar = 4 SYM, dubbed the "momentum-twistor diagrams". These are on-shell-diagrams obtained by gluing trivalent black and white vertices 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 the latter involve isolated bubble-structures for loop variables arising from forward limits, or the entangled removal of particles. From each diagram, the generalized "boundary measurement" directly gives the C, D matrices, thus a cell in the amplituhedron associated with the amplitude, and we expect that our diagrammatic representations of the amplitude provide triangulations of the amplituhedron. To demonstrate the computational power of the formalism, we give explicit results for general two-loop integrands, and the cells of the amplituhedron for two-loop MHV amplitudes.

  14. Breviz: Visualizing Spreadsheets using Dataflow Diagrams

    E-print Network

    Hermans, Felienne; van Deursen, Arie

    2011-01-01

    Spreadsheets are used extensively in industry, often for business critical purposes. In previous work we have analyzed the information needs of spreadsheet professionals and addressed their need for support with the transition of a spreadsheet to a colleague with the generation of data flow diagrams. In this paper we describe the application of these data flow diagrams for the purpose of understanding a spreadsheet with three example cases. We furthermore suggest an additional application of the data flow diagrams: the assessment of the quality of the spreadsheet's design.

  15. Auto Accidents: Reducing Frequency, Increasing Recovery.

    ERIC Educational Resources Information Center

    Comeaux, Linda Atkins

    1988-01-01

    Careful hiring, monitoring, training, discipline, and safety policies will reduce school automobile and bus accidents. Guidelines are offered for accident reporting, claim handling, and dealing with insurance adjusters. (MLF)

  16. 29 CFR 1926.200 - Accident prevention signs and tags.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 2010-07-01 false Accident prevention signs and tags. 1926.200 Section...Barricades § 1926.200 Accident prevention signs and tags. (a) General...locations.html. (h) Accident prevention tags. (1) Accident...

  17. Driving Circumstances and Accidents Among Novice Drivers

    Microsoft Academic Search

    S. Laapotti; E. Keskinen; M. Hatakka; K. Hernetkoski; A. Katila; M. Peräaho; I. Salo

    2006-01-01

    Objective. The study evaluated the accident risk of certain driving circumstances and driving motives among novice drivers.Methods. Self-reported exposure and accidents according to driving circumstances and driving motives were compared between young (n = 6,847) and middle-aged (n = 942) male and female novice drivers. For young drivers, self-reported accidents were further compared to fatal accidents (n = 645) in

  18. Time Slows Down during Accidents

    PubMed Central

    Arstila, Valtteri

    2012-01-01

    The experienced speed of the passage of time is not constant as time can seem to fly or slow down depending on the circumstances we are in. Anecdotally accidents and other frightening events are extreme examples of the latter; people who have survived accidents often report altered phenomenology including how everything appeared to happen in slow motion. While the experienced phenomenology has been investigated, there are no explanations about how one can have these experiences. Instead, the only recently discussed explanation suggests that the anecdotal phenomenology is due to memory effects and hence not really experienced during the accidents. The purpose of this article is (i) to reintroduce the currently forgotten comprehensively altered phenomenology that some people experience during the accidents, (ii) to explain why the recent experiments fail to address the issue at hand, and (iii) to suggest a new framework to explain what happens when people report having experiences of time slowing down in these cases. According to the suggested framework, our cognitive processes become rapidly enhanced. As a result, the relation between the temporal properties of events in the external world and in internal states becomes distorted with the consequence of external world appearing to slow down. That is, the presented solution is a realist one in a sense that it maintains that sometimes people really do have experiences of time slowing down. PMID:22754544

  19. The Inoculation Accident at Mulkowal

    Microsoft Academic Search

    Ronald Ross

    1907-01-01

    I SHOULD like to Direct the attention of your readers to this matter. The evidence regarding the unfortunate Mulkowal accident, as given in the Lancet and the British Medical Journal for February 2, and in the Journal of Tropical Medicine for February 1, shows that on October 30, 1902, nineteen persons were inoculated from a single bottle of Haffkine's prophylactic

  20. NASA Medical Response to Human Spacecraft Accidents

    NASA Technical Reports Server (NTRS)

    Patlach, Robert

    2010-01-01

    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.

  1. 48 CFR 36.513 - Accident prevention.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 2010-10-01 false Accident prevention. 36.513 Section 36.513 Federal...Contract Clauses 36.513 Accident prevention. (a) The contracting officer shall...the clause at 52.236-13, Accident Prevention, in solicitations and...

  2. ConcepTest: Relative Time Diagram #3

    NSDL National Science Digital Library

    Match the features in the relative time diagram below with the events described in the short sentence. Assume all rocks are sedimentary unless otherwise indicated. Which unit is composed of granite and older than ...

  3. A Phase Diagram for Solar Flares

    NASA Astrophysics Data System (ADS)

    Balasubramaniam, K. S.; Winter, Lisa; Pernak, Rick

    2015-04-01

    Using the data from the NOAA/GOES X-ray observations of ~50,000 flares, we develop a Phase Diagram for solar flares. Such a Solar Flare Phase Diagram helps to trace the underlying energy structure of solar flares, and provides a prediction framework. The temperature (maximum ratio of short (0.5 – 4 A) to long band (1-8 A) band) and background solar x-ray radiation (at 1-8 A band) forms the basis of the phase diagram. Using the phase diagram and relevant statistical analysis, we derive insights into the eruptive nature of flares during the solar-cycle ramp (ramp up to and ramp down from solar maximum) phases and peak phase of the solar cycle.

  4. Architecture flow diagrams under teamwork reg sign

    SciTech Connect

    Nicinski, T.

    1992-02-01

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

  5. Sequential Influence Diagrams: A Unified Asymmetry Framework

    E-print Network

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

    2004-10-01

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

  6. An Improved Mnemonic Diagram for Thermodynamic Relationships.

    ERIC Educational Resources Information Center

    Rodriguez, Joaquin; Brainard, Alan J.

    1989-01-01

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

  7. Voronoi diagram generation on the ellipsoidal earth

    NASA Astrophysics Data System (ADS)

    Hu, Hai; Liu, XiaoHang; Hu, Peng

    2014-12-01

    Voronoi diagram on the earth surface is a powerful tool to study spatial proximity at continental or global scale. However, its computation remains challenging because geospatial features have complex shapes. This paper presents a raster-based algorithm to generate Voronoi diagrams on earth's surface. The algorithm approximates the exact point-to-point geographical distances using the cell-to-cell geographical distances calculated by a geographical distance transform. The result is a distance image on which Voronoi diagram is delineated. Compared to existing methods, the proposed algorithm calculates geographical distances based on an earth ellipsoid and allows Voronoi generators to take complex shapes. Most importantly, its approximation error is bounded thus enabling users to control the accuracy of the Voronoi diagram through grid resolution.

  8. Sloan Digital Sky Survey - Hubble Diagram

    NSDL National Science Digital Library

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

  9. Minimum Energy Diagrams for Multieffect Distillation Arrangements

    E-print Network

    Skogestad, Sigurd

    Minimum Energy Diagrams for Multieffect Distillation Arrangements Hilde K. Engelien and Sigurd distillation arrangements for separating a ternary mixture have been considered. The focus is on a heat-integrated complex distillation configuration, called a multieffect prefractionator arrangement. The comparison

  10. Attribute Reduction Based on Property Pictorial Diagram

    PubMed Central

    Wan, Qing; Wei, Ling

    2014-01-01

    This paper mainly studies attribute reduction which keeps the lattice structure in formal contexts based on the property pictorial diagram. Firstly, the property pictorial diagram of a formal context is defined. Based on such diagram, an attribute reduction approach of concept lattice is achieved. Then, through the relation between an original formal context and its complementary context, an attribute reduct of complementary context concept lattice is obtained, which is also based on the property pictorial diagram of the original formal context. Finally, attribute reducts in property oriented concept lattice and object oriented concept lattice can be acquired by the relations of attribute reduction between these two lattices and concept lattice of complementary context. In addition, a detailed illustrative example is presented. PMID:25247200

  11. Interfaces for creating quantitative conceptual diagrams

    E-print Network

    Stewart, Robin S. (Robin Scott)

    2008-01-01

    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 ...

  12. Fluctuations and the QCD phase diagram

    SciTech Connect

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

    2012-06-15

    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.

  13. Steps toward a radio HR diagram

    Microsoft Academic Search

    Frazer Owen

    We discuss the possibility of establishing a set of observational parameters for radio galaxies which could be used to study radio source evolution in the same way that the Hertzsprung-Russell diagram is used to understand stellar evolution. As a first step towards a radio H-R diagram, we show that the FRI\\/II break is a function of both radio and optical

  14. Algebraic decision diagrams and their applications

    Microsoft Academic Search

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

    1993-01-01

    In this paper we present theory and experiments on the AlgebraicDecision Diagrams (ADD's). These diagrams extend BDD'sby allowing values from an arbitrary finite domain to be associatedwith the terminal nodes. We present a treatment foundedin boolean algebras and discuss algorithms and results in applicationslike matrix multiplication and shortest path algorithms.Furthermore, we outline possible applications of ADD's to logicsynthesis, formal verification,

  15. A universal structured-design diagramer

    NASA Technical Reports Server (NTRS)

    1981-01-01

    Program (FLOWCHARTER) generates standardized flowcharts and concordances for development and debugging of programs in any language. User describes programming-language grammar, providing syntax rules in Backus-Naur form (BNF), list of semantic rules, and set of concordance rules. Once grammar is described, user supplies only source code of program to be diagrammed. FLOWCHARTER automatically produces flow diagram and concordance. Source code for program is written for PASCAL Release 2 compiler, as distributed by University of Minnesota.

  16. Implications of Cladistics: Understanding Branching Diagrams

    NSDL National Science Digital Library

    This site explains how a cladogram is formed and its implications. The cladogram is compared to a family tree, however unlike family trees, ancestors in cladistics ideally give rise to only two descendent species. Also unlike family trees, new species form from splitting of old species. Three possible diagrams showing the relationship between humans, gorillas, baboons, and chimpanzees are demonstrated. The author explains why one diagram is favored and also explains the meaning of nodes and clades.

  17. Reliability computation from reliability block diagrams

    NASA Technical Reports Server (NTRS)

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

    1971-01-01

    A method and a computer program are presented to calculate probability of system success from an arbitrary reliability block diagram. The class of reliability block diagrams that can be handled include any active/standby combination of redundancy, and the computations include the effects of dormancy and switching in any standby redundancy. The mechanics of the program are based on an extension of the probability tree method of computing system probabilities.

  18. Drawing conformal diagrams for a fractal landscape

    Microsoft Academic Search

    Sergei Winitzki; Sergei

    2005-01-01

    Generic models of cosmological inflation and the recently proposed scenarios of a recycling universe and the string theory landscape predict spacetimes whose global geometry is a stochastic, self-similar fractal. To visualize the complicated causal structure of such a universe, one usually draws a conformal (Carter-Penrose) diagram. I develop a new method for drawing conformal diagrams, applicable to arbitrary 1+1-dimensional spacetimes.

  19. Sets and The Venn Diagram (Beginner)

    NSDL National Science Digital Library

    2011-05-23

    This lesson is designed to introduce students to sets, what it means to be part of a set, and how Venn diagrams relate to sets. This lesson provides links to discussions and activities related to sets and Venn diagrams as well as suggested ways to integrate them into the lesson. Finally, the lesson provides links to follow-up lessons designed for use in succession with the current one.

  20. Class diagram based evaluation of software performance

    NASA Astrophysics Data System (ADS)

    Pham, Huong V.; Nguyen, Binh N.

    2013-03-01

    The evaluation of software performance in the early stages of the software life cycle is important and it has been widely studied. In the software model specification, class diagram is the important object-oriented software specification model. The measures based on a class diagram have been widely studied to evaluate quality of software such as complexity, maintainability, reuse capability, etc. However the software performance evaluation based on Class model has not been widely studied, especially for object-oriented design of embedded software. Therefore, in this paper we propose a new approach to directly evaluate the software performance based on class diagrams. From a class diagram, we determine the parameters which are used to evaluate and build formula of the measures such as Size of Class Variables, Size of Class Methods, Size of Instance Variables, Size of Instance Methods, etc. Then, we do analysis of the dependence of performance on these measures and build the performance evaluation function from class diagram. Thereby we can choose the best class diagram based on this evaluation function.

  1. Single pilot IFR accident data analysis

    NASA Technical Reports Server (NTRS)

    Harris, D. F.

    1983-01-01

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

  2. Commercial driver accident research survey

    Microsoft Academic Search

    M U Mir; J Razzak; K Ahmad

    2010-01-01

    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

  3. Accident/Mishap Investigation System

    NASA Technical Reports Server (NTRS)

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

    2007-01-01

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

  4. Coherently Explaining UML Statechart and Collaboration Diagrams by Graph Transformations

    E-print Network

    Gogolla, Martin - Fachbereich 3

    use case, class, object, and sequence diagrams as well. The statechart and collaboration diagrams describe the operations of the underlying class diagram and include OCL expressions as guards and parts in [Kuske et al., 2002] for class, object and statechart diagrams. Since this approach does not cover

  5. Diagrams Based on Structural Object Perception Pourang Irani

    E-print Network

    New Hampshire, University of

    (506) 453-4566 cware@omg.unb.ca ABSTRACT Most diagrams, particularly those used in software engineering attention on a common class of diagrams technically called graphs in computer science, and also sometimes called a node-link diagram. This category of diagrams includes software structure charts [14], entity

  6. Coverage Criteria for Testing of Object Interactions in Sequence Diagrams

    E-print Network

    Rountev, Atanas "Nasko"

    engineering, both for class diagrams and for sequence diagrams. In addition, several static analyses proposed of collaborating objects. The cri- teria are based on UML sequence diagrams that are reverse-engineered from the previous work that proposes such approaches. With the help of reverse-engineering tools, sequence diagrams

  7. Coverage Criteria for Testing of Object Interactions in Sequence Diagrams

    E-print Network

    Sawin, Jason

    of collaborating objects. The cri- teria are based on UML sequence diagrams that are reverse-engineered from work that proposes such approaches. With the help of reverse-engineering tools, sequence diagrams can, both for class diagrams and for sequence diagrams. In addition, several static analyses proposed

  8. Javelin Diagrams: A Graphical Tool for Probabilistic Sensitivity Analysis

    E-print Network

    Hazen, Gordon

    of a probabilistic sensitivity analysis. Here we introduce an analog of tornado diagrams for probabilistic sensitivity analysis, which we call javelin diagrams. Javelin diagrams are graphical augmentations of tornado). For instance, Clemen (1996, Ch.5) illustrates how tornado diagrams (e.g., Howard 1988) can be used to determine

  9. Evolution of HR Diagrams So as a cluster ages, the

    E-print Network

    Barnes, Joshua Edward

    Evolution of HR Diagrams So as a cluster ages, the main sequence `burns down' in order. lifetime Diagram to Determine the Age of a Star Cluster #12;Evolution of HR Diagrams So as a cluster ages, the main of plotting stars, we represent them with a line of constant age. Using the H-R Diagram to Determine the Age

  10. Science Visual Literacy: Learners' Perceptions and Knowledge of Diagrams

    ERIC Educational Resources Information Center

    McTigue, Erin M.; Flowers, Amanda C.

    2011-01-01

    Constructing meaning from science texts relies not only on comprehending the words but also the diagrams and other graphics. The goal of this study was to explore elementary students' perceptions of science diagrams and their skills related to diagram interpretation. 30 students, ranging from second grade through middle school, completed a diagram

  11. 49 CFR 1152.10 - System diagram map.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false System diagram map. 1152.10 Section 1152.10 Transportation...Diagram § 1152.10 System diagram map. (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...

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

    ERIC Educational Resources Information Center

    Clary, Renee; Wandersee, James

    2010-01-01

    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…

  13. 49 CFR 1152.10 - System diagram map.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 false System diagram map. 1152.10 Section 1152.10 Transportation...Diagram § 1152.10 System diagram map. (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...

  14. 49 CFR 1152.10 - System diagram map.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 false System diagram map. 1152.10 Section 1152.10 Transportation...Diagram § 1152.10 System diagram map. (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...

  15. 49 CFR 1152.10 - System diagram map.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 false System diagram map. 1152.10 Section 1152.10 Transportation...Diagram § 1152.10 System diagram map. (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...

  16. 49 CFR 1152.10 - System diagram map.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

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

  17. Timed Data Flow Diagrams Jurgen Symanzik and Albert L. Baker

    E-print Network

    Symanzik, Jürgen

    Timed Data Flow Diagrams J¨urgen Symanzik and Albert L. Baker TR #96--23 December 1996 Keywords, Formalized Data Flow Diagrams, Timed Petri Nets. c fl Copyright 1996 by J¨urgen Symanzik and Albert L. Baker, Iowa 50011--1040, USA #12; 1 1 TIMED DATA FLOW DIAGRAMS Abstract Data Flow Diagrams (DFD's) are widely

  18. Timed Data Flow Diagrams Jurgen Symanzik and Albert L. Baker

    E-print Network

    Symanzik, Jürgen

    Timed Data Flow Diagrams Jurgen Symanzik and Albert L. Baker TR 96 23 December 1996 Keywords, Formalized Data Flow Diagrams, Timed Petri Nets. c Copyright 1996 by Jurgen Symanzik and Albert L. Baker. All 1040, USA #12;1 1 TIMED DATA FLOW DIAGRAMS Abstract Data Flow Diagrams DFD's are widely used

  19. Abstracting Business Level UML Diagrams from Web Applications

    Microsoft Academic Search

    Giuseppe Antonio Di Lucca; Anna Rita Fasolino; Porfirio Tramontana; Ugo De Carlini

    2003-01-01

    In this paper, a reverse engineering approach for reconstructing UML diagrams at business level of the application domain of a Web application is presented. In particular, the approach allows the reconstruction of the UML class diagram providing an object-oriented conceptual model of the application domain, sequence diagrams modeling the interactions among the identified business objects and use case diagrams modeling

  20. On phase diagrams of magnetic reconnection

    SciTech Connect

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

    2013-06-15

    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.

  1. Measurement of Eye Diagrams and Constellation Diagrams of Optical Sources Using Linear Optics and Waveguide Technology

    Microsoft Academic Search

    C. Dorrer; Christopher Richard Doerr; I. Kang; Roland Ryf; J. Leuthold; P. J. Winzer

    2005-01-01

    We demonstrate the characterization of optical sources with high sensitivity, high temporal resolution, and phase sensitivity using linear optical sampling. Eye diagrams and constellation diagrams are reconstructed using the interference of the source under test with a train of sampling pulses. This concept is implemented using a waveguide optical hybrid, which splits and recombines the sources and adjusts the phase

  2. Evaluating data flow diagrams and class diagrams in usability laboratory experiments (CADPRO Pilot #2)

    Microsoft Academic Search

    SHINGO TAKADA; LOUISE SCOTT; ANDY BROOKS

    This paper reports on a second pilot experiment for the CADPRO project taking into account a number of the recommendations arising from the first pilot. Three subjects produced data flow diagrams and class diagrams in a usability laboratory setting. Characteristics of subjects' solutions are discussed and the usefulness of profiles of product delivery and constraint activations against time is determined.

  3. Transformation from Data Flow Diagram to UML2.0 activity diagram

    Microsoft Academic Search

    Fanchao Meng; Dianhui Chu; Dechen Zhan

    2010-01-01

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

  4. The Butterfly diagram leopard skin pattern

    NASA Astrophysics Data System (ADS)

    Ternullo, Maurizio

    2011-08-01

    A time-latitude diagram where spotgroups are given proportional relevance to their area is presented. The diagram reveals that the spotted area distribution is higly dishomogeneous, most of it being concentrated in few, small portions (``knots'') of the Butterfly Diagram; because of this structure, the BD may be properly described as a cluster of knots. The description, assuming that spots scatter around the ``spot mean latitude'' steadily drifting equatorward, is challenged. Indeed, spots cluster around at as many latitudes as knots; a knot may appear at either lower or higher latitudes than previous ones, in a seemingly random way; accordingly, the spot mean latitude abruptly drifts equatorward or even poleward at any knot activation, in spite of any smoothing procedure. Preliminary analyses suggest that the activity splits, in any hemisphere, into two or more distinct ``activity waves'', drifting equatorward at a rate higher than the spot zone as a whole.

  5. 1-loop color structures and sunny diagrams

    NASA Astrophysics Data System (ADS)

    Kol, Barak; Shir, Ruth

    2015-02-01

    The space of tree level color structures for gluon scattering was determined recently along with its transformation properties under permutations. Here we generalize the discussion to loops, demonstrating a reduction of an arbitrary color diagram to its vacuum skeleton plus rays. For 1-loop there are no residual relations and we determine the space of color structures both diagrammatically and algebraically in terms of certain sunny diagrams. We present the generating function for the characteristic polynomials and a list of irreducible representations for 3 ? n ? 9 external legs. Finally we present a new proof for the 1-loop shuffle relations based on the cyclic shuffle and split operations.

  6. Fusion Diagrams in the - and - Systems

    NASA Astrophysics Data System (ADS)

    Asadov, M. M.; Akhmedova, N. A.

    2014-10-01

    A calculation model of the Gibbs energy of ternary oxide compounds from the binary components was used. Thermodynamic properties of -- ternary systems in the condensed state were calculated. Thermodynamic data of binary and ternary compounds were used to determine the stable sections. The probability of reactions between the corresponding components in the -- system was estimated. Fusibility diagrams of systems - and - were studied by physical-chemical analysis. The isothermal section of the phase diagram of -- at 298 K is built, as well as the projection of the liquid surface of --.

  7. Supplemental national crash severity study accident reconstruction

    NASA Astrophysics Data System (ADS)

    Segal, D. J.; McGrath, M. T.; Balasubramanian, N.

    1980-09-01

    Accident data was collected that allows determination of the relationships between occupant injury and accident severity. The measure of severity most commonly used to characterize an accident is the velocity change experienced by the passenger compartment during the collision. In some 52 percent of the accidents contained in the pre-April 1978 National Crash Severity Study (NCSS) data file, these velocity changes were established with the CRASH computer program. A substantial number of the remaining cases were reconstructable with other methods. Procedures were developed to estimate velocity changes in two car accidents in which the damage to 484 additional accidents from the pre-April 1978 NCSS file were reconstructed to the point of having velocity change estimates for the vehicles involved.

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

    PubMed

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

    2014-01-01

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

  9. Aircraft Loss-of-Control Accident Analysis

    NASA Technical Reports Server (NTRS)

    Belcastro, Christine M.; Foster, John V.

    2010-01-01

    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.

  10. [Fatal accidents at train intersections in Denmark].

    PubMed

    Kejlaa, G

    1990-01-01

    Material was collected concerning fatal level-crossing accidents in Denmark during the period 1.1.1980 to 31.12.1987. The epidemiological and traumatic circumstances are illustrated. A total of 51 fatal level-crossing accidents occurred which corresponds to 1% of all the annual traffic deaths in Denmark. The majority of the accidents occurred in good weather conditions and between 12 noon and 3.59 pm. Single-person accidents constituted 75%. The majority of the persons killed belonged to the local population and were familiar with the local conditions. The majority of the accidents were the local conditions. The majority of the accidents were due to poor visual conditions and lack of attention. In level-crossings with a keeper, the commonest causes were blinding by the sun and fog. The majority of the accidents occurred in level-crossings marked by light and sound signals. The risk for accidents in these crossings is six times as great as in crossings with half barriers. Private cars were most frequently involved and the persons killed in these died of head and cerebral injuries because the train buffers hit them at head height. Derailing of the trains was only seen on three occasions where the obstructing vehicles were heavy lorries. The fact that more derailings did not occur must be due to the low rate of the trains in the railway sidings where the majority of accidents occurred. A few proposals are made for prophylactic measures. PMID:2296808

  11. HTGR severe accident sequence analysis

    SciTech Connect

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

    1982-01-01

    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.

  12. Constructing Causal Diagrams to Learn Deliberation

    ERIC Educational Resources Information Center

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

    2009-01-01

    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…

  13. Fog Machines, Vapors, and Phase Diagrams

    ERIC Educational Resources Information Center

    Vitz, Ed

    2008-01-01

    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…

  14. Testability Analysis of a UML Class Diagram

    Microsoft Academic Search

    Benoit Baudry; Yves Le Traon; Gerson Sunyé

    2002-01-01

    Design-for-testability is a very important issue in software engineering. It becomes crucial in the case of OO designs where control flows are generally not hierarchical, but are diffuse and distributed over the whole architecture. In this paper, we concentrate on detecting, pinpointing and suppressing potential testability weaknesses of a UML class diagram. The attribute significant from design testability is called

  15. Students' different understandings of class diagrams

    Microsoft Academic Search

    Jonas Boustedt

    2012-01-01

    The software industry needs well-trained software designers and one important aspect of software design is the ability to model software designs visually and understand what visual models represent. However, previous research indicates that software design is a difficult task to many students. This article reports empirical findings from a phenomenographic investigation on how students understand class diagrams, Unified Modeling Language

  16. Automatically Extracting Class Diagrams from Spreadsheets

    Microsoft Academic Search

    Felienne Hermans; Martin Pinzger; Arie van Deursen

    2010-01-01

    The use of spreadsheets to capture information is widespread in in- dustry. Spreadsheets can thus be a wealthy source of domain information. We propose to automatically extract this information and transform it into class di- agrams. The resulting class diagram can be used by software engineers to un- derstand, refine, or re-implement the spreadsheet's functionality. To enable the transformation into

  17. Nice class diagrams admit good design?

    Microsoft Academic Search

    Holger Eichelberger; Am Hubland

    2003-01-01

    Analysis and design of programs by using tools has emerged to a standard technique in object-oriented software engineering. Many of these tools claim to implement methods according to the UML standard and some of the tools provide automatic layout of the diagrams drawn by the user or generated automatically from source code. In this paper we propose a set of

  18. Empirical Validation of Class Diagram Complexity Metrics

    Microsoft Academic Search

    Marcela Genero; Mario Piattini; Luis Jiménez

    2001-01-01

    One of the principal objectives of software engineering is to improve the quality of software products. It is widely recognised that the quality assurance of software products must be guaranteed from the early phases of development. As a key artifact produced in the early development of object-oriented (OO) information systems (OOISs), class diagram quality has a great impact on the

  19. Drawing conformal diagrams for a fractal landscape

    SciTech Connect

    Winitzki, Sergei [Department of Physics, Ludwig-Maximilians University, Theresienstr. 37, 80333 Munich (Germany)

    2005-06-15

    Generic models of cosmological inflation and the recently proposed scenarios of a recycling universe and the string theory landscape predict spacetimes whose global geometry is a stochastic, self-similar fractal. To visualize the complicated causal structure of such a universe, one usually draws a conformal (Carter-Penrose) diagram. I develop a new method for drawing conformal diagrams, applicable to arbitrary 1+1-dimensional spacetimes. This method is based on a qualitative analysis of intersecting lightrays and thus avoids the need for explicit transformations of the spacetime metric. To demonstrate the power and simplicity of this method, I present derivations of diagrams for spacetimes of varying complication. I then apply the lightray method to three different models of an eternally inflating universe (scalar-field inflation, recycling universe, and string theory landscape) involving the nucleation of nested asymptotically flat, de Sitter and/or anti-de Sitter bubbles. I show that the resulting diagrams contain a characteristic fractal arrangement of lines.

  20. Phase Diagram of a Charged Bose Gas

    Microsoft Academic Search

    J. P. Hansen; B. Jancovici; Daniel Schiff

    1972-01-01

    The phase diagram of a charged Bose gas is drawn. We discuss the domains of existence of the solid, fluid, and superfluid phases. It is predicted that superdense helium can be superfluid at densities higher than 106 g\\/cm3.

  1. Fat Voronoi Diagrams Gary L. Miller

    E-print Network

    Miller, Gary L.

    quadtree form a good aspect ratio Voronoi diagram. Figure 1: Right: A fat Voronoi cell can have arbitrarily aspect ratio. The cell on the right is fat but it does not have good aspect ratio. The dual complex. A Voronoi cell, Vor(v), is -fat if Rv rv . The classic definition of a good aspect ratio Voronoi cell

  2. New developments in understanding the HR diagram

    Microsoft Academic Search

    Cesare Chiosi; Gianpaolo Bertelli; Alessandro Bressan

    1992-01-01

    Results of recent research efforts aimed at the interpretation and reproduction of the Hertzsprung-Russell diagram are reviewed. In particular, attention is given to basic stellar evolution; nuclear reactions, opacities, and stellar winds; semiconduction and convective overshoot; and old star clusters. The discussion also covers intermediate age clusters and Cepheid stars and supergiant stars in the Milky Way and LMC.

  3. The granulation boundary in the HR diagram

    Microsoft Academic Search

    David F. Gray; Thomas Nagel

    1989-01-01

    A granulation boundary in the H-R diagram is found. The boundary runs smoothly from spectral type G1 Ib to near F0 on the main sequence. On the cool side of the boundary, the spectral line bisectors are of the classical type associated with granulation. On the hot side the bisectors show a reversed slope and curvature indicative of some other

  4. Synthetic HR-diagrams for massive stars

    Microsoft Academic Search

    E. Nasi; C. Forieri

    1990-01-01

    Observations of luminous stars are compared to synthetic HR diagrams generated from three sets of evolutionary models with different treatment of mass loss, convective overshoot, and considering or not variations in the opacity due to heavy elements. We take into account also different values for the slope of the initial mass function, and the possibility that a fraction of the

  5. Complexities of One-Component Phase Diagrams

    ERIC Educational Resources Information Center

    Ciccioli, Andrea; Glasser, Leslie

    2011-01-01

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

  6. Phase diagram of spiking neural networks.

    PubMed

    Seyed-Allaei, Hamed

    2015-01-01

    In computer simulations of spiking neural networks, often it is assumed that every two neurons of the network are connected by a probability of 2%, 20% of neurons are inhibitory and 80% are excitatory. These common values are based on experiments, observations, and trials and errors, but here, I take a different perspective, inspired by evolution, I systematically simulate many networks, each with a different set of parameters, and then I try to figure out what makes the common values desirable. I stimulate networks with pulses and then measure their: dynamic range, dominant frequency of population activities, total duration of activities, maximum rate of population and the occurrence time of maximum rate. The results are organized in phase diagram. This phase diagram gives an insight into the space of parameters - excitatory to inhibitory ratio, sparseness of connections and synaptic weights. This phase diagram can be used to decide the parameters of a model. The phase diagrams show that networks which are configured according to the common values, have a good dynamic range in response to an impulse and their dynamic range is robust in respect to synaptic weights, and for some synaptic weights they oscillates in ? or ? frequencies, independent of external stimuli. PMID:25788885

  7. Phase diagram of spiking neural networks

    PubMed Central

    Seyed-allaei, Hamed

    2015-01-01

    In computer simulations of spiking neural networks, often it is assumed that every two neurons of the network are connected by a probability of 2%, 20% of neurons are inhibitory and 80% are excitatory. These common values are based on experiments, observations, and trials and errors, but here, I take a different perspective, inspired by evolution, I systematically simulate many networks, each with a different set of parameters, and then I try to figure out what makes the common values desirable. I stimulate networks with pulses and then measure their: dynamic range, dominant frequency of population activities, total duration of activities, maximum rate of population and the occurrence time of maximum rate. The results are organized in phase diagram. This phase diagram gives an insight into the space of parameters – excitatory to inhibitory ratio, sparseness of connections and synaptic weights. This phase diagram can be used to decide the parameters of a model. The phase diagrams show that networks which are configured according to the common values, have a good dynamic range in response to an impulse and their dynamic range is robust in respect to synaptic weights, and for some synaptic weights they oscillates in ? or ? frequencies, independent of external stimuli. PMID:25788885

  8. Dynamic Tactile Diagram Simplification on Refreshable Displays

    ERIC Educational Resources Information Center

    Rastogi, Ravi; Pawluk, Dianne T. V.

    2013-01-01

    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,…

  9. Orphan-Free Anisotropic Voronoi Diagrams

    E-print Network

    Canas, Guillermo D

    2011-01-01

    We describe conditions under which an appropriately-defined anisotropic Voronoi diagram of a set of sites in Euclidean space is guaranteed to be composed of connected cells in any number of dimensions. These conditions are natural for problems in optimization and approximation, and algorithms already exist to produce sets of sites that satisfy them.

  10. Composition inference for UML class diagrams

    Microsoft Academic Search

    Ana Milanova

    2007-01-01

    ABSTRACT Knowing which associations are compositions is important in a tool for the reverse engineering of UML class diagrams. Firstly, recovery of composition relationships bridges the gap between design and code. Secondly, since composition relationships explicitly state a requirement that certain representations cannot be exposed, it is important to determine if this requirement is met by component,code. Verifying that compositions

  11. Embedding Wellformed Euler Diagrams Peter Rodgers1

    E-print Network

    Kent, University of

    "Northern Ireland". The zone that is in the contour "Ireland" but not in the contour "United Kingdom (non-empty) regions are called zones. For example, Figure 1 has a contour with label "Ireland" contains the item "Republic of Ireland". The demonstrable popularity of Euler diagrams lies in their wide

  12. Linear-size approximate voronoi diagrams

    Microsoft Academic Search

    Sunil Arya; Theocharis Malamatos

    2002-01-01

    Given a set S of n points in IRd, a (t, ?)-approximate Voronoi diagram (AVD) is a partition of space into constant complexity cells, where each cell c is associated with t representative points of S, such that for any point in c, one of the associated representatives approximates the nearest neighbor to within a factor of (1 + ?).

  13. The Binary Temperature-Composition Phase Diagram

    ERIC Educational Resources Information Center

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

    2006-01-01

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

  14. Ring-Diagram Analysis: Status and Perspectives

    Microsoft Academic Search

    F. Hill

    1999-01-01

    Ring diagram analysis is now more than a decade old. While the details of the technique are still evolving, the application of the method to MDI, TON, Mt. Wilson, HLH, and GONG data is providing intriguing results. Thanks to the work of many people, it is now becoming possible to observationally infer the complicated dynamics in the outer 15 Mm

  15. Subsurface flows from ring diagram analysis

    Microsoft Academic Search

    Irene González Hernández

    2008-01-01

    Since it was introduced, almost 20 years ago, ring-diagram analysis, a local helioseismology technique, has provided a variety of results, from large-scale motions on the Sun, such as differential rotation and meridional circulation, to the more localized studies of flows associated to active regions and filaments. This paper presents some relevant results obtained by several authors using this method that

  16. Multimedia presentation design using data flow diagrams

    Microsoft Academic Search

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

    1997-01-01

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

  17. On the Reliability of Ring Diagram Analysis

    Microsoft Academic Search

    I. Gonzalez Hernandez; J. Patron; Dean-Yi Chou

    1998-01-01

    A comparison between the results of applying a ring diagram analysis to two data sets is described in order to check the quality of the two sets and the reliability of the method. The series used have been obtained with two different helioseismological instruments with the same spatial resolution. A section of 30 × 30 deg2 about the disk center

  18. Subsurface flows from ring diagram analysis

    Microsoft Academic Search

    Irene Gonzalez Hernandez

    Since it was introduced, almost 20 years ago, ring-diagram analysis, a local helioseismology technique, has provided a variety of results, from large-scale motions on the Sun, such as dierential rotation and meridional circulation, to the more localized studies of flows associated to active regions and filaments. This paper presents some relevant results obtained by several authors using this method that

  19. Meridional Flows from Ring Diagram Analysis

    Microsoft Academic Search

    I. González Hernández; J. Patrón; R. S. Bogart

    1999-01-01

    In order to search for meridional circulation in the solar envelope, we have applied ring diagram analysis to a set of small regions over the surface. The helioseismic data consist of Solar Oscillation Investigation\\/Michelson Doppler Imager Dopplergrams taken over a time span of about 50 hr (~3000 images) on 1998 June 20-22. The regions studied cover 115 deg in latitude

  20. Nonverbal Poetry: Family Life-Space Diagrams.

    ERIC Educational Resources Information Center

    Bardill, Donald R.

    2001-01-01

    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…

  1. An AGN Hertzsprung-Russell Diagram

    E-print Network

    Peter Barthel

    2002-01-07

    Detailed examination of the balance between star-formation and nuclear activity in AGN and starburst galaxies leads to the composition of an Hertzsprung-Russell diagram in which possible evolutionary tracks can be drawn. It is likely that these tracks also relate to the level of obscuration.

  2. Near Earth Objects Program: Orbit Diagrams

    NSDL National Science Digital Library

    NASA JPL Near Earth Object Program

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

  3. Visualizing hyperbolic Voronoi diagrams Frank Nielsen

    E-print Network

    Nielsen, Frank

    -nearest neighbor classification rules. The Hyperbolic geometry [2] is a non-Euclidean geome- try where simultaneously the diagram in the five standard models of hyperbolic geometry: Namely, the Poincar´e disk for the Euclidean distance D(P, Q) = pC -qC , where pC and qC denote the Cartesian coordinates of P and Q

  4. Effects of the Chernobyl accident on public perceptions of nuclear plant accident risks

    Microsoft Academic Search

    Michael K. Lindell; Ronald W. Perry

    1990-01-01

    Assessments of public perceptions of the characteristics of a nuclear power plant accident and affective responses to its likelihood were conducted 5 months before and 1 month after the Chernobyl accident. Analyses of data from 69 residents of southwestern Washington showed significant test-retest correlations for only 10 of 18 variables--accident likelihood, three measures of impact characteristics, three measures of affective

  5. [Multiple injuries in mass accidents].

    PubMed

    Wondrák, E

    1984-01-01

    The treatment starts with reanimation, managing the shock, followed by life-saving surgery on the central nervous system, chest, abdomen, large blood vessels and the uropoietic system. From the very beginning the therapy should be conducted on an intradisciplinary basis, first with the anaesthesiologist, later with other specialists as required. Once the patient's life has been saved, treatment of eyes, hands and systematic attention to extremities should follow. Shock has to be managed within 24 hours. Luxations of large joints should be reposed on the date of injury, open fractures closed, all fractures immobilized in favourable position. No extension should be applied in patients suffering from brain injuries; fractures of the femur should be fixed surgically by a second team in the course of the neurosurgical operation. A stomatologist's assistance makes general anaesthesia possible even with fractures of the jaw. In mass accidents the therapeutic plan for the polytraumatized should be fixed on the following day. A mass accident involving 35 injured treated within two and a half hours demonstrates this procedure in 7 polytraumatized persons. PMID:6741324

  6. Bifurcation Diagrams and Generalized Bifurcation Diagrams for a rotational model of an oblate satellite

    E-print Network

    Tarnopolski, Mariusz

    2013-01-01

    This paper presents bifurcation and generalized bifurcation diagrams for a rotational model of an oblate satellite. Special attention is paid to parameter values describing one of Saturn's moons, Hyperion. For various oblateness the largest Lyapunov Characteristic Exponent (LCE) is plotted. The largest LCE in the initial condition as well as in the mixed parameter-initial condition space exhibits a fractal structure, for which the fractal dimension was calculated. It results from the bifurcation diagrams of which most of the parameter values for preselected initial conditions lead to chaotic rotation. The First Recurrence Time (FRT) diagram provides an explanation of the birth of chaos and the existence of quasi-periodic windows occuring in the bifurcation diagrams.

  7. Visualizing Flow Diagrams in WebSphere Studio Using SHriMP Views (Visualizing Flow Diagrams)

    Microsoft Academic Search

    Derek Rayside; Marin Litoiu

    Abstract: This paper describes the integration of an information visualization tool, called SHriMPViews, with IBM WebSphere Studio Application Developer Integration Edition, whichwas developed with Eclipse technology. Although SHriMP was originally developedfor visualizing programs, it is content-independent. We have re-targeted SHriMP forvisualizing flow diagrams. Flow diagrams, as supported by WebSphere Studio ApplicationDeveloper Integration Edition, can be hierarchically composed, thus...

  8. 49 CFR 840.3 - Notification of railroad accidents.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

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

  9. 49 CFR 840.3 - Notification of railroad accidents.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 false Notification of railroad accidents. 840.3 Section 840.3...BOARD RULES PERTAINING TO NOTIFICATION OF RAILROAD ACCIDENTS § 840.3 Notification of railroad accidents. The operator of a...

  10. 49 CFR 840.3 - Notification of railroad accidents.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

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

  11. 49 CFR 840.3 - Notification of railroad accidents.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 false Notification of railroad accidents. 840.3 Section 840.3...BOARD RULES PERTAINING TO NOTIFICATION OF RAILROAD ACCIDENTS § 840.3 Notification of railroad accidents. The operator of a...

  12. 49 CFR 840.3 - Notification of railroad accidents.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

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

  13. 43 CFR 15.13 - Report of accidents.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...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...

  14. 43 CFR 15.13 - Report of accidents.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...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...

  15. 43 CFR 15.13 - Report of accidents.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...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...

  16. 43 CFR 15.13 - Report of accidents.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...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...

  17. 43 CFR 15.13 - Report of accidents.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...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...

  18. 10 CFR 835.1304 - Nuclear accident dosimetry.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...2012-01-01 2012-01-01 false Nuclear accident dosimetry. 835.1304 ...Situations § 835.1304 Nuclear accident dosimetry. (a) Installations...individuals to radiation from a nuclear accident is possible, shall...

  19. 10 CFR 835.1304 - Nuclear accident dosimetry.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Nuclear accident dosimetry. 835.1304 ...Situations § 835.1304 Nuclear accident dosimetry. (a) Installations...individuals to radiation from a nuclear accident is possible, shall...

  20. 10 CFR 835.1304 - Nuclear accident dosimetry.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...2014-01-01 2014-01-01 false Nuclear accident dosimetry. 835.1304 ...Situations § 835.1304 Nuclear accident dosimetry. (a) Installations...individuals to radiation from a nuclear accident is possible, shall...

  1. 10 CFR 835.1304 - Nuclear accident dosimetry.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...2011-01-01 2011-01-01 false Nuclear accident dosimetry. 835.1304 ...Situations § 835.1304 Nuclear accident dosimetry. (a) Installations...individuals to radiation from a nuclear accident is possible, shall...

  2. 10 CFR 835.1304 - Nuclear accident dosimetry.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...2013-01-01 2013-01-01 false Nuclear accident dosimetry. 835.1304 ...Situations § 835.1304 Nuclear accident dosimetry. (a) Installations...individuals to radiation from a nuclear accident is possible, shall...

  3. BLANKET STUDENT ACCIDENT AND SICKNESS INSURANCE

    E-print Network

    Suzuki, Masatsugu

    BLANKET STUDENT ACCIDENT AND SICKNESS INSURANCE Especially Designed for Students of your resources and benefits under the plan of insurance sponsored by your school. It is not a contract of insurance. Your coverage is governed by a policy of student accident and sickness insurance underwritten

  4. BLANKET STUDENT ACCIDENT AND SICKNESS INSURANCE

    E-print Network

    Suzuki, Masatsugu

    BLANKET STUDENT ACCIDENT AND SICKNESS INSURANCE Especially Designed for the Dependents Abroad. This brochure is a summary of your benefits under the plan of insurance sponsored by your school. It is not a contract of insurance. Your coverage is governed by a policy of student accident and sickness insurance

  5. The hermeneutics of accidents and safety

    Microsoft Academic Search

    DONALD H. TAYLOR

    1981-01-01

    The engineering aspects of road safety have now become so sophisticated that road accidents have seemingly reached an asymptotic level. Unfortunately this level is well above zero, and the remaining accidents seem to be due not so much to faults in the environmental interface as to carelessness and perversity. Mechanistic models of man are not well equipped to deal with

  6. Exact Location : Date of Accident : AM PM

    E-print Network

    Swaddle, John

    SSN Cell Phone Home Phone Work Phone Exact Location : Date of Accident : AM PM Date accident. Send this completed form to Carole Shaver, Human Resources Phone : 757-221-3160 or Name of Witness : Was safety equipment used? Describe nature of Injury and describe body part affected (to include right

  7. A Serious Game for Traffic Accident Investigators

    ERIC Educational Resources Information Center

    Binsubaih, Ahmed; Maddock, Steve; Romano, Daniela

    2006-01-01

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

  8. A serious game for traffic accident investigators

    Microsoft Academic Search

    Ahmed Binsubaih; Steve Maddock; Daniela Romano

    2006-01-01

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

  9. Commuting road traffic accidents in Croatia

    Microsoft Academic Search

    I Kolcic; A V Jovic; U Rodin; I Brkic Bilos; N Antoljak; O Polasek

    2010-01-01

    The aim of the study was to investigate risk factors associated with commuting road traffic accidents (RTA) in Croatia. A total of 1138 persons hospitalised for various accidents were surveyed in this cross-sectional study. Data were collected from 23 hospitals from all parts of Croatia during March–May 2008. The questionnaire encompassed personal data, socioeconomic status, lifestyle determinants and health status

  10. Aircraft accidents.method of analysis

    NASA Technical Reports Server (NTRS)

    1937-01-01

    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.

  11. The economics of nuclear accident law

    Microsoft Academic Search

    Michael Trebilcock; Ralph A. Winter

    1997-01-01

    Statutes restrict the application of common tort law to accidents at nuclear power plants in Canada, the U.S., and other countries. The statutes transfer to the operator of a nuclear plant liability that would otherwise be placed on input suppliers and in return limit the liability of the operator. This essay addresses the impact on safety incentives of nuclear accident

  12. An Investigation of the Therac-25 Accidents

    E-print Network

    Yang, Junfeng

    for life-critical systems comes from small firms, especially in the medical device industry; firms that fit in accidents. Some of the most widely cited software-related accidents in safety-critical systems involved. As Frank Houston of the US Food and Drug Admin- istration (FDA) said, "A significant amount of software

  13. Normal Accident at Three Mile Island.

    ERIC Educational Resources Information Center

    Perrow, Charles

    1981-01-01

    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)

  14. Diffuse Neck Swelling after Car Accident

    Microsoft Academic Search

    HUAN-WU CHEN; SHENG-CHAU HUANG; HUAN-WEN CHEN; KOU-MOU HUANG

    2005-01-01

    The neck connects the head with the trunk, and is easily injuried due to trauma. Herein we reported a case with diffuse neck swelling after car accident. She suffered from progressive dyspnea and cyanosis 3 hours after the accident and needed airway main- tenance with tracheostomy. A plain lateral radi- ograph and computed tomography scan of the neck showed diffuse

  15. Risk Advisor for Car Accidents Javier Larrosa

    E-print Network

    Larrosa, Javier

    Risk Advisor for Car Accidents Javier Larrosa LSI­UPC 1 Description of the Problem The purpose of this project is to design a Bayesian Network modeling the risk of having a car accident, when planing a trip. -- Distance of the trip. -- Road conditions. -- Weather -- Car age -- Car equipment -- Car type -- Driver

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

    E-print Network

    Johnson, Peter D.

    1 TRAVEL ACCIDENT INSURANCE PLAN 01-01-2012 The Travel Accident Insurance Plan provides 24-hour. Please note that the Employer reserves the right to amend or terminate this Travel Accident Insurance Plan at any time and for any reason. WHO IS ELIGIBLE FOR THE TRAVEL ACCIDENT INSURANCE PLAN? Active

  17. On the Role of Activity Diagrams in UML Institut fr Informatik, Technische Universitt Mnchen

    E-print Network

    object-oriented diagrams like class and statechart diagrams. In this paper we propose to use activity diagrams as a bridge between use case diagrams and class diagrams. This gives three benefits: a smooth and incremental class diagram development. Keywords Analysis and Design, Use Cases, Activity Diagram 1

  18. The Fukushima Daiichi Accident Study Information Portal

    SciTech Connect

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

    2012-11-01

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

  19. [Thromboembolic accident after mitral valve replacement].

    PubMed

    Drissa, Habiba; Ben Salah, Faten; Ben Romdhane, Seddika; Zaouali, Romdhane Mohsen

    2004-03-01

    Between January 1981 and December 2000, we report 112 cases of mitral valvular replacement with bileaflet prothesis. Saint Jude prosthesis was implanted in 71% of cases. With a mean follow-up of 110 months we report a thromboembolic accident in 7 cases (6.2%). The linear rate of thromboembolic accident is 0.69% A/P. This complication was concerned 5 women and 5 men. The mean age is 54 years (43-65 years). An embolic accident without prosthesis thrombosis is noted in 6 cases. We report only one case of prosthesis occlusive thrombosis with urgent chirurgical intervention. Par rapport au RVM, l'ATE est survenue dans uns délai moyen de 129 months (86-168 months). Left atrium size, embolic antecedent, and bad anticoagulation are the predicted factors of thromboembolic accidents in our study. Patient age and sex, atrial fibrillation, type of bileaflet prosthesis don't influence the occurrence of thromboembolic accident. PMID:15382464

  20. Commercial SNF Accident Release Fractions

    SciTech Connect

    J. Schulz

    2004-11-05

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

  1. Generating random values using Binary Decision Diagrams and Convex Polyhedra

    E-print Network

    Paris-Sud XI, Université de

    Generating random values using Binary Decision Diagrams and Convex Polyhedra Erwan Jahier Pascal Introduction 3 2 BDD and convex polyhedra 3 2.1 Binary Decision Diagram (BDD) . . . . . . . . . . . . . . . . . . 3 2.2 Convex Polyhedra . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 The resolution

  2. Proof test diagrams for Zerodur glass-ceramic

    NASA Technical Reports Server (NTRS)

    Tucker, D. S.

    1991-01-01

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

  3. Teaching Verbal Chains Using Flow Diagrams and Texts

    ERIC Educational Resources Information Center

    Holliday, William G.

    1976-01-01

    A discussion of the recent diagram and attention theory and research surprisingly suggests that a single flow diagram with instructive questions constitutes an effective learning medium in terms of verbal chaining. (Author)

  4. Enriched model categories and diagram categories

    E-print Network

    Guillou, Bertrand

    2011-01-01

    We collect in one place a variety of known and folklore results in enriched model category theory and add a few new twists. One twist is a new perspective on equivariant model categories. A central theme is a general procedure for constructing a Quillen adjunction, often a Quillen equivalence, between a given V-model category and a category of diagrams in V, where V is any good enriching category. From this perspective, we rederive the result of Schwede and Shipley that reasonable stable model categories are Quillen equivalent to diagram categories of spectra (alias categories of module spectra). The general theory will be applied to G-spectra in a sequel, and for that we need quite a few technical improvements and modifications of general model categorical results. We collect those here. They are bound to have applications in a variety of other contexts.

  5. 1-loop Color structures and sunny diagrams

    E-print Network

    Barak Kol; Ruth Shir

    2014-06-05

    Recently the space of tree level color structures for gluon scattering was determined in arXiv:1403.6837 together with its transformation properties under permutations. Here we generalize the discussion to loops, demonstrating a reduction of an arbitrary color diagram to its vacuum skeleton plus rays. For 1-loop there are no residual relations and we determine the space of color structures both diagrammatically and algebraically in terms of certain sunny diagrams. We present the generating function for the characteristic polynomials and a list of irreducible representations for $3 \\le n \\le 9$ external legs. Finally we present a new proof for the 1-loop shuffle relations based on the cyclic shuffle and split operations.

  6. Krajewski diagrams and the Standard Model

    E-print Network

    Christoph A. Stephan

    2008-09-30

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

  7. Reheating Phase Diagram for Higgs Inflation

    E-print Network

    Cai, Rong-Gen; Wang, Shao-Jiang

    2015-01-01

    We investigate the impact on the inflationary predictions from various reheating histories which are characterized by an e-folding number $N_{\\mathrm{reh}}$ and an effective equation-of-state parameter $w_{\\mathrm{reh}}$ during reheating process. For Higgs inflation with a non-minimal coupling to gravity, the predictions are obtained on the $N_{\\mathrm{reh}}\\!\\!-\\!w_{\\mathrm{reh}}$ reheating phase diagram. We find that the predictions are insensitive to reheating phase. Within the $1\\sigma$ region of the scalar spectral index $n_s$ reported by Planck 2014 Preliminary, almost all possible reheating histories are allowed on the reheating phase diagram, where Higgs inflation with canonical reheating history $w_{\\mathrm{reh}}=0$ lies near the upper edge of the $1\\sigma$ range of $n_s$. Future measurements of $n_s$ with high precision will identify the reheating physics of Higgs inflation.

  8. Loop series expansion with propagation diagrams

    E-print Network

    Yusuke Watanabe; Kenji Fukumizu

    2008-11-13

    The Bethe approximation is a successful method for approximating partition functions of probabilistic models associated with a graph. Recently, Chertkov and Chernyak derived an interesting formula called Loop Series Expansion, which is an expansion of the partition function. The main term of the series is the Bethe approximation while other terms are labelled by subgraphs called generalized loops. In this paper, we derive a loop series expansion of binary pairwise Markov random fields with propagation diagrams, which describe rules how first messages and secondary messages propagate. Our approach allows to express the Loop Series in the form of a polynomial with coefficients positive integers. Using the propagation diagrams, we establish a new formula that shows a relation between the exact marginal probabilities and their Bethe approximations.

  9. Extracting parameters from Colour-Magnitude Diagrams

    E-print Network

    Bonatto, C; Kepler, S O; Bica, E

    2015-01-01

    We present a simple approach for obtaining robust values of astrophysical parameters from the observed colour-magnitude diagrams (CMDs) of star clusters. The basic inputs are the Hess diagram built with the photometric measurements of a star cluster and a set of isochrones covering wide ranges of age and metallicity. In short, each isochrone is shifted in apparent distance modulus and colour excess until it crosses over the maximum possible Hess density. Repeating this step for all available isochrones leads to the construction of the solution map, in which the optimum values of age and metallicity - as well as foreground/background reddening and distance from the Sun - can be searched for. Controlled tests with simulated CMDs show that the approach is efficient in recovering the input values. We apply the approach to the open clusters M\\,67, NGC\\,6791, and NGC\\,2635, which are characterised by different ages, metallicities and distances from the Sun.

  10. Modeling the state diagrams of ternary reciprocal systems

    NASA Astrophysics Data System (ADS)

    Khaldoyanidi, K. A.

    2014-12-01

    A model p-T diagram of a eutectic-type ternary reciprocal system is presented. An isobaric cross section in the form of a projection onto a concentration diagram is shown. Isothermic and polythermic cross sections of a eutectic-type ternary reciprocal fusibility diagram with swept faces of a tetrahedral prism are created. A projection of the diagram of a ternary reciprocal system with solid solutions based on initial components with a ternary nonstoichiometric intermediate phase is considered.

  11. Massive basketball diagram for a thermal scalar field theory

    NASA Astrophysics Data System (ADS)

    Andersen, Jens O.; Braaten, Eric; Strickland, Michael

    2000-08-01

    The ``basketball diagram'' is a three-loop vacuum diagram for a scalar field theory that cannot be expressed in terms of one-loop diagrams. We calculate this diagram for a massive scalar field at nonzero temperature, reducing it to expressions involving three-dimensional integrals that can be easily evaluated numerically. We use this result to calculate the free energy for a massive scalar field with a ?4 interaction to three-loop order.

  12. Sufficient Criteria for Consistent Behavior Modeling with Refined Activity Diagrams

    Microsoft Academic Search

    Stefan Jurack; Leen Lambers; Katharina Mehner; Gabriele Taentzer

    2008-01-01

    In use case-driven approaches to requirements modeling, UML ac- tivity diagrams are a wide-spread means for refining the functional view of use cases. Early consistency validation of activity diagrams is therefore desirable but difficult due to the semi-formal nature of activity diagrams. In this paper, we specify well-structured activity diagrams and define activities more precisely by pre- and post- conditions.

  13. Diagramming Aesthetics: Modernism and Architecture in the 21 st Century

    Microsoft Academic Search

    Mark Clayton

    In architectural design, diagramming has an equally important role in functional studies and in aesthetic studies. Diagrams\\u000a are used to create and explore alternative schemes at the very early stages. They are also used to explain concepts once a\\u000a project is completed. Learning to diagram is an important part of architectural education. A particular diagramming vocabulary\\u000a can help to guide

  14. Post-accident radiation monitors

    SciTech Connect

    Laughlin, G.J.; Kathren, R.L.

    1982-01-01

    Under contract to the Nuclear Safety Analysis Center of the Electric Power Research Institute, technical information and specifications were obtained for commercially available radiological monitoring instrumentation designed for use as post-accident monitors. The information was collated and published in the NSAC Handbook of Postaccident Instrumentation (Kathren and Laughlin 1981), and included such data as range, accuracy, precision, sensitivity, and energy dependence of the detector, environmental and seismic limitations of the equipment, the testing program performed to evaluate the equipment, a list of references where the instrumentation is currently installed, and a list of features and accessories available with the monitoring systems. The information presented in this section reveals that, even though a number of vendors claim to be able to meet the guidance of Regulatory Guide 1.97 (USNRC 1980), few have actually conducted tests to verify that their equipment does indeed satisfy the guidance of this Regulatory Guide, and that some of the guidance may in fact be unrealistic.

  15. Towards Aspect-Oriented Class Diagrams

    Microsoft Academic Search

    Gefei Zhang

    2005-01-01

    While aspect-oriented modeling has been recognized as a useful means of improving the modularity of software de- sign, the de facto standard modeling language UML lacks first-class model elements representing aspects and does not provide genuine support for aspect-oriented modeling. We propose a simple extension of UML class diagrams which contains a very generic pointcut and advice language and facilitates

  16. Helping Software Engineers Reusing UML Class Diagrams

    Microsoft Academic Search

    Paulo Gomes; Pedro Gandola; Joel Cordeiro

    2007-01-01

    Software development is a knowledge-intensive task, with an increasing demand for higher productivity. During the design phase,\\u000a the use of visual modelling languages like UML (Unified Modeling Language) are wide spread across the software industry. In\\u000a this paper we present a CBR tool that helps the software engineers to reuse UML diagrams. We describe our system, REBUILDER\\u000a UML, and present

  17. Using Diagrams and Models: 2.75

    NSDL National Science Digital Library

    2012-09-26

    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.

  18. Instability regions in the upper HR diagram

    Microsoft Academic Search

    Cornelis de Jager; Alex Lobel; Hans Nieuwenhuijzen; Richard Stothers

    2001-01-01

    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 winds (where vwind=vsound) are situated inside the photospheres, at a

  19. Thread-Based Analysis of Sequence Diagrams

    Microsoft Academic Search

    Haitao Dan; Robert M. Hierons; Steve Counsell

    2007-01-01

    Sequence Diagrams (SDs) offer an intuitive and visual way of describing expected behaviour of Object Oriented (OO) software.\\u000a They focus on modelling the method calls among participants of a software system at runtime. This is an essential difference\\u000a from its ancestor, basic Message Sequence Charts (bMSCs), which are mainly used to model the exchange of asynchronous messages.\\u000a Since method calls

  20. Representing the Study Site in a Diagram

    NSDL National Science Digital Library

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

    2003-08-01

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

  1. Mechanical phase diagram of shrinking cylindrical gels

    NASA Astrophysics Data System (ADS)

    Boudaoud, Arezki; Chaïeb, Sahraoui

    2003-08-01

    When polymer gels are subjected to an external stimulus such as temperature or solvent change, they undergo a phase transition often driving pattern formation. In this paper, we use an elastic model to investigate the linear stability of shrinking cylindrical NIPA gels. This model exhibits bubble and bamboo patterns. The wavelengths of these patterns and their phase diagram are in agreement with the experiment of Matsuo and Tanaka [Nature (London) 358, 482 (1992)].

  2. A flow phase diagram for helium superfluids

    Microsoft Academic Search

    L. Skrbek

    2004-01-01

    The existence of the flow phase diagram predicted by Volovik [JETP Lett. 78, 553 (2003)] is discussed based on the available experimental data for He II and 3He-B. The effective temperature-dependent but scale-independent Reynolds number Reeff?1\\/q?(1???)\\/?, where ? and ?? are the mutual friction parameters, and the superfluid Reynolds number characterizing the circulation\\u000a of the superfluid component in units of

  3. Meridional Flows From Ring Diagram Analysis

    Microsoft Academic Search

    I. González Hernández; J. Patron; R. S. Bogart

    1998-01-01

    Meridional circulation from the equator to the poles is found by applying ring diagram analysis to helioseismic data. The data are SOI\\/MDI Dopplergrams taken every minute during its Dynamics Program in 1996. The time span used in this work is about 50 hours (~3000 images). Studying sections of 15x15 degrees over the solar surface centered at latitudes 0-circ, plus or

  4. Mixed wasted integrated program: Logic diagram

    SciTech Connect

    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

    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).

  5. [Iodine prophylaxis following nuclear accidents].

    PubMed

    Jaworska, Alicja

    2007-01-01

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

  6. The Critical Importance of Russell's Diagram

    NASA Astrophysics Data System (ADS)

    Gingerich, O.

    2013-04-01

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

  7. Nonthermal Radio Emission and the HR Diagram

    NASA Technical Reports Server (NTRS)

    Gibson, D. M.

    1985-01-01

    Perhaps the most reliable indicator of non-radiative heating/momentum in a stellar atmosphere is the presence of nonthermal radio emission. To date, 77 normal stellar objects have been detected and identified as nonthermal sources. These stellar objects are tabulated herein. It is apparent that non-thermal radio emission is not ubiquitous across the HR diagram. This is clearly the case for the single stars; it is not as clear for the binaries unless the radio emission is associated with their late-type components. Choosing to make this association, the single stars and the late-type components are plotted together. The following picture emerges: (1) there are four locations on the HR diagram where non-thermal radio stars are found; (2) the peak incoherent 5 GHz luminosities show a suprisingly small range for stars within each class; (3) the fraction of stellar energy that escapes as radio emission can be estimated by comparing the integrated maximum radio luminosity to the bolometric luminosity; (4) there are no apparent differences in L sub R between binaries with two cool components, binaries with one hot and one cool component, and single stars for classes C and D; and (5) The late-type stars (classes B, C, and D) are located in parts of the HR diagram where there is reason to suspect that the surfaces of the stars are being braked with respect to their interiors.

  8. Scalable Consistency Checking between Diagrams The VIEWINTEGRA Approach Alexander Egyed

    E-print Network

    Egyed, Alexander

    The Unified Modeling Language (UML) supports a wide range of diagrams for modeling software develop- ment description of a system [2]. The major drawback of "diagram-centric" software en- gineering. If a set of issues about a software system is investi- gated, each through its own set of diagrams

  9. Reasoning on UML Class Diagrams using Description Logic Based Systems

    E-print Network

    De Giacomo, Giuseppe

    Reasoning on UML Class Diagrams using Description Logic Based Systems Daniela Berardi, Diego- agrams. The ability of reasoning automatically on UML class diagrams makes it possible to provide, the reasoning capabilities of such systems can be used to reason on UML class diagrams. However, we report some

  10. Interactive Exploration of UML Sequence Diagrams Richard Sharp

    E-print Network

    Rountev, Atanas "Nasko"

    in software systems. Reverse-engineered sequence diagrams, which are constructed from existing code method max in class java.math.BigDecimal. opment [8], reverse-engineering of sequence diagrams-world se- quence diagrams in order to gain insights about the behav- ior of the underlying software. We

  11. A Design of an Assessment System for UML Class Diagram

    Microsoft Academic Search

    Noraida Haji Ali; Z. Shukur; S. Idris

    2007-01-01

    The Unified Modeling Language (UML) is probably the most widely known and used notation for object- oriented analysis and design. UML consists of various graphical notations, which capture the static system structures (class diagrams), system component behaviors (state transition diagrams) and system component interactions (collaboration and sequence diagrams). UML notations can be produced with the help of CASE (Computer-aided software

  12. Reveal: A Tool to Reverse Engineer Class Diagrams

    E-print Network

    Malloy, Brian

    Reveal: A Tool to Reverse Engineer Class Diagrams Sarah Matzko, Peter J. Clarke, Tanton H. Gibbs- gineer a class diagram from the C++ source code representation of the software. In Re- veal, we remain to three other tools that reverse-engineer class diagrams, for both compliance to the UML standard

  13. Reasoning on UML Class Diagrams using Description Logic Based Systems

    E-print Network

    Calvanese, Diego

    Reasoning on UML Class Diagrams using Description Logic Based Systems Daniela Berardi, Diego­ agrams. The ability of reasoning automatically on UML class diagrams makes it possible to provide, the reasoning capabilities of such systems can be used to reason on UML class diagrams. However, we report some

  14. Agent UML Class Diagrams Revisited Marc-Philippe Huget

    E-print Network

    Atkinson, Katie

    . In UML, objects which are the main element in the software are represented by class diagrams. SinceAgent UML Class Diagrams Revisited Marc-Philippe Huget Agent ART Group University of Liverpool and objects are not exactly the same, one can guess that the UML class diagram has to be changed

  15. Assessing the Comprehension of UML Class Diagrams via Eye Tracking

    Microsoft Academic Search

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

    2007-01-01

    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

  16. Extracting Sequence Diagrams from Execution Traces using Interactive Visualization

    E-print Network

    Montréal, Université de

    . Keywords-reverse engeneering; sequence diagrams; visual- ization; I. INTRODUCTION The reverse engineering automat- ing the reverse-engineering process of sequence diagrams, we propose a semi-automated processExtracting Sequence Diagrams from Execution Traces using Interactive Visualization Hassen Grati

  17. Finite Satisfiability of UML Class Diagrams with Constrained Class Hierarchy

    E-print Network

    Balaban, Mira

    24 Finite Satisfiability of UML Class Diagrams with Constrained Class Hierarchy MIRA BALABAN for efficient powerful methods for verifying model correctness. Class diagram is the central language within UML of finite satisfiability of class diagrams with class hierarchy constraints and generalization

  18. Automatic Code Generation From UML Class and Statechart Diagrams

    E-print Network

    Tanaka, Jiro

    of the classes is represented by a set of statechart diagrams. To facilitate the software development processAutomatic Code Generation From UML Class and Statechart Diagrams Graduate School of Systems From UML Class and Statechart Diagrams Iftikhar Azim Niaz November 2005 A dissertation submitted

  19. Checking Data Integrity via the UML Class Diagram

    Microsoft Academic Search

    Ahmad Alsaadi

    2006-01-01

    The class diagram is the most important UML diagram of an object-oriented software system. It includes both the static and behavioral aspects of its system. This can serve as a pattern for a persistent collection of objects, or as a scheme for a database system, and as a set of communication diagrams at the same time. Different types of behavioral

  20. Reveal: A Tool to Reverse Engineer Class Diagrams

    E-print Network

    Malloy, Brian

    Reveal: A Tool to Reverse Engineer Class Diagrams Sarah Matzko, Peter J. Clarke, Tanton H. Gibbs present a tool, Reveal, to reverse engineer a class diagram from the C + + source code representa- tion of the software. In Reveal, we remain faithful to the UML standard definition of a class diagram wher- ever

  1. Dinosaur Extinction: Causal Loop Diagram of Earth Feedback System

    NSDL National Science Digital Library

    Dewey M. McLean

    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.

  2. The Use of Semantic Constraints on Diagram Editors

    Microsoft Academic Search

    J. Artur Serrano

    1995-01-01

    Current software tools supporting diagramming notations are not satisfactory. Editors for diagramming notations such as State Transition Networks, Petri Nets or the Entity-Relationship data model, are always confronted with a problem: how much guidance should be given to the user throughout the editing task? Not enough guidance allows the diagram to evolve to non plausible configurations and may provoke the

  3. Translating Wigmore Diagrams Glenn ROWE and Chris REED

    E-print Network

    Reed, Chris

    of Toulmin and standard argument diagrams is facilitated by the use of Araucaria [4], a software package. Araucaria has recently been extended to version 3.1, which now allows Wigmore diagrams to be created from marked-up text. Araucaria allows translation between Wigmore diagrams and both standard and Toulmin

  4. MAGNETIC FIELDS IN THE HR DIAGRAM Jeffrey L. Linsky

    E-print Network

    Linsky, Jeffrey L.

    MAGNETIC FIELDS IN THE HR DIAGRAM Jeffrey L. Linsky JILA/University of Colorado and NIST Solar. What are the consequences of this behavior in a dynamic atmosphere? 1 A Tour Through the HR Diagram of the HR Diagram. Questions to ask during our tour: ffl What direct or indirect techniques can measure

  5. The HR Diagram of Globular Clusters: Theorist' view(s)

    E-print Network

    D'Antona, Francesca

    The HR Diagram of Globular Clusters: Theorist' view(s) F. D'Antona Osservatorio Astronomico di Roma, Italy Abstract: I list the characteristic features of Globular Cluster (GC) HR diagrams which provide by looking at the composite HR diagram of the GC NGC 6397 shown in figure 1, and illustrated in figure 2

  6. 30 CFR 256.8 - Leasing maps and diagrams.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 false Leasing maps and diagrams. 256.8 Section 256...Management, General § 256.8 Leasing maps and diagrams. (a) Any area... (b) The MMS shall prepare leasing maps and official protraction diagrams of...

  7. Describing Use-Case Relationships with Sequence Diagrams

    Microsoft Academic Search

    Jesús Manuel Almendros-jiménez; Luis Iribarne

    2007-01-01

    One of the key tools of the unified modelling language for behaviour modelling is the use-case model. The behaviour of a use case can be described by means of interaction diagrams (sequence and collaboration diagrams), activity charts and state diagrams or by pre-conditions and post- conditions, as well as natural language text, where appropriate. This article explains a technique to

  8. A Comparison of Petri Net and Activity Diagram Variants

    Microsoft Academic Search

    Rik EshuisRoel Wieringa

    2001-01-01

    Petri net variants are widely used as a work- flow modelling technique. Recently, UML ac- tivity diagrams are used for the same pur- pose, even though the syntax and semantics of activity diagrams has not been yet fully worked out. Nevertheless, activity diagrams seem very similar to Petri nets and on the surface, one may think that they are vari-

  9. The Problem of Labels in E-Assessment of Diagrams

    ERIC Educational Resources Information Center

    Jayal, Ambikesh; Shepperd, Martin

    2009-01-01

    In this article we explore a problematic aspect of automated assessment of diagrams. Diagrams have partial and sometimes inconsistent semantics. Typically much of the meaning of a diagram resides in the labels; however, the choice of labeling is largely unrestricted. This means a correct solution may utilize differing yet semantically equivalent…

  10. Oak Ridge National Laboratory Technology Logic Diagram. Executive Summary

    SciTech Connect

    Not Available

    1993-06-30

    This executive summary contains a description of the logic diagram format; some examples from the diagram (Vol. 2) and associated technology evaluation data sheets (Vol. 3); a complete (albeit condensed) listing of the RA, D&D, and WM problems at ORNL; and a complete listing of the technology rankings for all the areas covered by the diagram.

  11. 30 CFR 256.8 - Leasing maps and diagrams.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Leasing maps and diagrams. 256.8 Section 256...Management, General § 256.8 Leasing maps and diagrams. (a) Any area... (b) The MMS shall prepare leasing maps and official protraction diagrams of...

  12. 30 CFR 556.8 - Leasing maps and diagrams.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 2012-07-01 false Leasing maps and diagrams. 556.8 Section 556...Management, General § 556.8 Leasing maps and diagrams. (a) Any area...Act. (b) BOEM shall prepare leasing maps and official protraction diagrams of...

  13. 30 CFR 556.8 - Leasing maps and diagrams.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

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

  14. 30 CFR 556.8 - Leasing maps and diagrams.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...2014-07-01 2014-07-01 false Leasing maps and diagrams. 556.8 Section 556...Management, General § 556.8 Leasing maps and diagrams. (a) Any area...Act. (b) BOEM shall prepare leasing maps and official protraction diagrams of...

  15. Using Functional Flow Diagrams to Enhance Technical Systems Understanding.

    ERIC Educational Resources Information Center

    Satchwell, Richard E.

    1997-01-01

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

  16. Stochastic Analysis of Periodic Timed Data Flow Diagrams

    E-print Network

    Symanzik, Jürgen

    Stochastic Analysis of Periodic Timed Data Flow Diagrams with Markovian Transition Times Jurgen Symanzik TR 96 24 December 1996 Keywords: Statistical Software Engineering, Formalized Data Flow Diagrams University Ames, Iowa 50011 1040, USA #12;1 1 STOCHASTIC ANALYSIS OF PERIODIC TIMED DATA FLOW DIAGRAMS

  17. Stochastic Analysis of Periodic Timed Data Flow Diagrams

    E-print Network

    Symanzik, Jürgen

    Stochastic Analysis of Periodic Timed Data Flow Diagrams with Markovian Transition Times J¨urgen Symanzik TR #96--24 December 1996 Keywords: Statistical Software Engineering, Formalized Data Flow Diagrams University Ames, Iowa 50011--1040, USA #12; 1 1 STOCHASTIC ANALYSIS OF PERIODIC TIMED DATA FLOW DIAGRAMS

  18. Formalized Data Flow Diagrams and Their Relation to

    E-print Network

    Symanzik, Jürgen

    Formalized Data Flow Diagrams and Their Relation to Other Computational Models Jurgen Symanzik FLOW DIAGRAMS AND THEIR RELATION TO OTHER COMPUTATIONAL MODELS Abstract One approachto the formalizationofDataFlowDiagramsDFD'sis presented by Coleman Col91 , CB94 and Leavens, et al., LWBL96

  19. Compilation of Flow Diagrams into Target Code for Embedded Systems

    Microsoft Academic Search

    Achim Rettberg; Edwin Erpenbach; Jürgen Tacken; Carsten Rust; Bernd Kleinjohann

    In this paper we describe a part of our work on the automatic generation of target code from Stateflow models. We focus on the flow diagrams from the Stateflow component of MATLAB and describe how flow diagram models can be compiled into target code for embedded systems. Moreover, the paper describes a method for analyzing flow diagrams, allowing an efficient

  20. Non Atomic Components of Data Flow Diagrams: Stores, Persistent Flows,

    E-print Network

    Symanzik, Jürgen

    Non Atomic Components of Data Flow Diagrams: Stores, Persistent Flows, and Tests for Empty Flows #12;1 1 NON ATOMIC COMPONENTS OF DATA FLOW DIAGRAMS: STORES, PERSISTENT FLOWS, AND TESTS FOR EMPTY FLOWS Abstract It has been shown in SB96 that a particular subclass of Formalized Data Flow Diagrams

  1. Formalized Data Flow Diagrams and Their Relation to

    E-print Network

    Symanzik, Jürgen

    Formalized Data Flow Diagrams and Their Relation to Other Computational Models J¨urgen Symanzik FORMALIZED DATA FLOW DIAGRAMS AND THEIR RELATION TO OTHER COMPUTATIONAL MODELS Abstract One approach to the formalization of Data Flow Diagrams (DFD's) is presented by Coleman ([Col91], [CB94]) and Leavens, et al., [LWBL

  2. Subclasses of Formalized Data Flow Diagrams: Monogeneous, Linear, and

    E-print Network

    Symanzik, Jürgen

    Subclasses of Formalized Data Flow Diagrams: Monogeneous, Linear, and Topologically Free Choice 1040, USA #12;1 1 SUBCLASSES OF FORMALIZED DATA FLOW DIAGRAMS: MONOGENEOUS, LINEAR, AND TOPOLOGICALLY FREE CHOICE RDFD'S Abstract FormalizedData Flow DiagramsFDFD's and, especially, Reduced Data Flow

  3. Differential Cognitive and Affective Responses to Flow Diagrams in Science

    ERIC Educational Resources Information Center

    Holliday, William G.; And Others

    1977-01-01

    Describes a study in which tenth-grade biology students who were low verbal performers scored significantly higher on achievement tests when provided with picture-word diagrams of biological concepts than when provided with block-word diagrams. Students and teachers also preferred picture-word diagrams as indicated by a questionnaire. (MLH)

  4. Control Flow Analysis for Reverse Engineering of Sequence Diagrams

    E-print Network

    Rountev, Atanas "Nasko"

    Control Flow Analysis for Reverse Engineering of Sequence Diagrams Atanas Rountev Olga Volgin exchanged among them. The diagram may also contain additional in- formation about the flow of control during,volgin,reddoch}@cis.ohio-state.edu ABSTRACT Reverse engineering of UML sequence diagrams plays an im- portant role in iterative development

  5. Subclasses of Formalized Data Flow Diagrams: Monogeneous, Linear, and

    E-print Network

    Symanzik, Jürgen

    Subclasses of Formalized Data Flow Diagrams: Monogeneous, Linear, and Topologically Free Choice, Iowa 50011--1040, USA #12; 1 1 SUBCLASSES OF FORMALIZED DATA FLOW DIAGRAMS: MONOGENEOUS, LINEAR, AND TOPOLOGICALLY FREE CHOICE RDFD'S Abstract Formalized Data Flow Diagrams (FDFD's) and, especially, Reduced Data

  6. M.Gregory Forest The weak shear kinetic phase diagram

    E-print Network

    Zhou, Ruhai

    of Doi (1981), focusing on the anomalous slow flow regime. We provide the kinetic phase diagram, to provide the kinetic flow-phase diagram of Doi theory in the weak shear regime, 0 Æ Shear flow Æ Phase diagram Æ Rheology Rheol Acta (2004) 43: 17­37 DOI 10.1007/s00397

  7. A Logical Framework for Sequence Diagram with Combined Fragments

    E-print Network

    Texas at San Antonio, University of

    of messages. The Combined Fragments of UML Sequence Diagram permit various types of control flow among Diagram comprehension and analysis. This paper introduces an approach to formalizing the semantics, and deadlock-free. Keywords Modeling ­ Formal Analysis ­ Sequence Diagram ­ Concurrency & Communication

  8. Spatial disorientation in general aviation accidents.

    PubMed

    Kirkham, W R; Collins, W E; Grape, P M; Simpson, J M; Wallace, T F

    1978-09-01

    Spatial disorientation (SD) was the third highest "cause" of fatal accidents in small, fixed-wing aircraft and closely related to the second highest "cause"--"continued VFR flight into adverse weather." SD was a cause or factor in 16% of all fatal accidents. When SD was ascribed as a cause or factor in an accident, 90% of the time that accident involved fatalities. Small, fixed-wing aircraft under 12,500 lb (570 kg) accounted for 97.3% of all SD accidents. Inclement weather was associated with 42% of all fatal accidents, and SD was a cause or factor in 35.6% of these. Flight was initiated into and continued into adverse weather in 19.7 and 68.7%, respectively, of SD weather-related fatal accidents. Fog (56.8%) and rain (41.8%) were the most prevalent adverse weather conditions. These and other data attest to the importance of this psychophysiological phenomenon in flight safety. PMID:697670

  9. An analysis of aircraft accidents involving fires

    NASA Technical Reports Server (NTRS)

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

    1975-01-01

    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.

  10. Development of severe accident procedures for Ringhals

    SciTech Connect

    Lutz, R.J.; Frantz, E.; Prokopovich, S.R. (Westinghouse Electric Corp., Pittsburgh, PA (USA)); Bastien, R. (Westinghouse Electric Corp., Brussels (BE))

    1988-01-01

    Symptom based procedures have been developed for Ringhals to improve the ability of nuclear power plant operators to respond to severe accident transients leading to core melt and reactor vessel failure. These severe accident procedures, together with the existing Ringhals emergency operating procedures, constitute an integrated package of consistent operator actions for dealing with severe accidents in both the short term and long term. The impact of the recommended operator actions evaluated based on Ringhals specific analyses performed with the MAAP 3.0 version B computer code.

  11. Impact of nuclear accidents on marine biota.

    PubMed

    Vives i Batlle, Jordi

    2011-07-01

    The accident at the Fukushima Daiichi nuclear power plant, precipitated by the earthquake and subsequent tsunami that struck the northeastern coast of Japan in March 2011, has raised concerns about the potential impact to marine biota posed by the release of radioactive water and radionuclide particles into the environment. The Fukushima accident is the only major nuclear accident that has resulted in the direct discharge of radioactive materials into a coastal environment. This article briefly summarizes what is currently understood about the effects of radioactive wastewaters and radionuclides to marine life. PMID:21608110

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

    NASA Technical Reports Server (NTRS)

    Evans, Joni K.

    2007-01-01

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

  13. 76 FR 63654 - Outer Continental Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-13

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

  14. Mobility-Related Accidents Experienced by People with Visual Impairment

    E-print Network

    Manduchi, Roberto

    in the survey focused on the frequency, nature, and causes of head-level and fall accidents, as well as on other, other types of accidents (e.g., traffic-related accidents) are also important and should be addressedMobility-Related Accidents Experienced by People with Visual Impairment Roberto Manduchi, PhD* Sri

  15. Use of Human Factors Analysis for Wildland Fire Accident Investigations

    Microsoft Academic Search

    Michelle Ryerson; Chuck Whitlock

    2005-01-01

    Accident investigators at any level are challenged with identifying causal factors and making preventative recommendations. This task can be particularly complicated considering that 70-80% of accidents are associated with human error. Due to complexities of the wildland fire environment, this is especially challenging when investigating a wildland fire-related accident. Upon reviewing past accident investigations within the United States Federal wildland

  16. State-Transition Diagrams for Biologists

    PubMed Central

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

    2012-01-01

    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

  17. Characterization of a nuclear accident dosimeter

    E-print Network

    Burrows, Ronald Allen

    1995-01-01

    National Laboratories' (SNL) personal nuclear accident dosimeter (PNAD). Two separate critical assemblies, SHEBA and Godiva, were used to generate seven separate neutron spectra for use in dose comparisons. SNL's PNAD measured absorbed doses that were...

  18. A Humanoid Robot to Prevent Children Accidents

    Microsoft Academic Search

    Altion Simo; Yoshifumi Nishida; Koichi Nagashima

    2006-01-01

    We describe in this paper the implementation and experimentation of a humanoid robot system, aimed at the prevention of children accidents in everyday indoor activities. The main focus of this research work is placed on the \\

  19. Chernobyl accident: A comprehensive risk assessment

    SciTech Connect

    Vargo, G.J.; Poyarkov, V.; Baryakhtar, V.; Kukhar, V.; Los, I.

    1999-01-01

    The authors, all of whom are Ukrainian and Russian scientists involved with Chernobyl nuclear power plant since the April 1986 accident, present a comprehensive review of the accident. In addition, they present a risk assessment of the remains of the destroyed reactor and its surrounding shelter, Chernobyl radioactive waste storage and disposal sites, and environmental contamination in the region. The authors explore such questions as the risks posed by a collapse of the shelter, radionuclide migration from storage and disposal facilities in the exclusion zone, and transfer from soil to vegetation and its potential regional impact. The answers to these questions provide a scientific basis for the development of countermeasures against the Chernobyl accident in particular and the mitigation of environmental radioactive contamination in general. They also provide an important basis for understanding the human health and ecological risks posed by the accident.

  20. Chernobyl accident: A comprehensive risk assessment

    SciTech Connect

    Vargo, G.J.; Poyarkov, V.; Baryakhtar, V.; Kukhar, V.; Los, I.

    1999-11-01

    The authors, all of whom are Ukrainian and Russian scientists involved with Chernobyl nuclear power plant since the April 1986 accident, present a comprehensive review of the accident. In addition, they present a risk assessment of the remains of the destroyed reactor and its surrounding shelter, Chernobyl radioactive waste storage and disposal sites, and environmental contamination in the region. The authors explore such questions as the risks posed by a collapse of the shelter, radionuclide migration from storage and disposal facilities in the exclusion zone, and transfer from soil to vegetation and its potential regional impact. The answers to these questions provide a scientific basis for the development of countermeasures against the Chernobyl accident in particular and the mitigation of environmental radioactive contamination in general. They also provide an important basis for understanding the human health and ecological risks posed by the accident.

  1. Designing for post-accident radiological conditions

    SciTech Connect

    Lahti, G.P.; Brtis, J.S.; Davidson, G.R.; Gill, C.F.

    1980-12-01

    Nuclear power plant design efforts have previously tacitly assumed that in the event of an accident, all actions necessary to bring the plant to a cold shutdown could be accomplished from a well-protected control room. However, the incident at Three Mile Island, Unit 2 (TMI-2), showed that access to the balance-of-plant is desirable, and perhaps even necessary, to determine the past and future course of an accident and its consequences. The present report reviews the in-plant radiological consequences of the TMI-2 accident and formulates radiation protection design criteria for the balance-of-plant which would minimize post-accident in-plant radiation exposure.

  2. 22 CFR 102.8 - Reporting accidents.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... If a scheduled United States air carrier is involved the airline representatives concerned will probably...first to be informed of the accident...telephone number of representatives of any United States airline engaged...

  3. 22 CFR 102.8 - Reporting accidents.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... If a scheduled United States air carrier is involved the airline representatives concerned will probably...first to be informed of the accident...telephone number of representatives of any United States airline engaged...

  4. 22 CFR 102.8 - Reporting accidents.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... If a scheduled United States air carrier is involved the airline representatives concerned will probably...first to be informed of the accident...telephone number of representatives of any United States airline engaged...

  5. 22 CFR 102.8 - Reporting accidents.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... If a scheduled United States air carrier is involved the airline representatives concerned will probably...first to be informed of the accident...telephone number of representatives of any United States airline engaged...

  6. 22 CFR 102.8 - Reporting accidents.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... If a scheduled United States air carrier is involved the airline representatives concerned will probably...first to be informed of the accident...telephone number of representatives of any United States airline engaged...

  7. A systems approach to food accident analysis

    E-print Network

    Helferich, John D

    2011-01-01

    Food borne illnesses lead to 3000 deaths per year in the United States. Some industries, such as aviation, have made great strides increasing safety through careful accident analysis leading to changes in industry practices. ...

  8. Containment leakage during severe accident conditions

    SciTech Connect

    Hofmayer, C.H.; Bagchi, G.; Noonan, V.S.

    1984-01-01

    An alternate to the THRESHOLD model used in most severe accident risk assessments has been investigated. One reference plant for each of six containment types has been studied to determine the magnitude of containment leakage that would result from the pressures and temperatures associated with severe accident conditions. Containment penetrations having the greatest potential for early containment leakage are identified. The studies indicate that containment leakage through penetrations prior to reaching containment threshold pressures (currently reported containment shell failure pressures) should be considered in severe accident risk assessments. Failure of non-metallic seals for containment penetrations can be a significant source of containment leakage under severe accident pressure and temperature conditions. Although studies of containment types are useful in identifying sources of containment leakage, final conclusions may need to be plant specific. Recommendations concerning future studies to better develop the use of continuous leakage models are provided. 9 references, 4 figures, 2 tables.

  9. Mean-Curvature Flow of Voronoi Diagrams

    NASA Astrophysics Data System (ADS)

    Elsey, Matt; Slep?ev, Dejan

    2015-02-01

    We study the evolution of grain boundary networks by the mean-curvature flow under the restriction that the networks are Voronoi diagrams for a set of points. For such evolution we prove a rigorous universal upper bound on the coarsening rate. The rate agrees with the rate predicted for the evolution by mean-curvature flow of the general grain boundary networks, namely that the typical grain area grows linearly in time. We perform a numerical simulation which provides evidence that the dynamics achieves the rate of coarsening that agrees with the upper bound in terms of scaling.

  10. Diagram of Saturn V Launch Vehicle

    NASA Technical Reports Server (NTRS)

    1971-01-01

    This is a good cutaway diagram of the Saturn V launch vehicle showing the three stages, the instrument unit, and the Apollo spacecraft. The chart on the right presents the basic technical data in clear detail. The Saturn V is the largest and most powerful launch vehicle in the United States. The towering 363-foot Saturn V was a multistage, multiengine launch vehicle standing taller than the Statue of Liberty. Altogether, the Saturn V engines produced as much power as 85 Hoover Dams. Development of the Saturn V was the responsibility of the Marshall Space Flight Center at Huntsville, Alabama, directed by Dr. Wernher von Braun.

  11. Shape diagram of vesicles in Poiseuille flow.

    PubMed

    Coupier, Gwennou; Farutin, Alexander; Minetti, Christophe; Podgorski, Thomas; Misbah, Chaouqi

    2012-04-27

    Soft bodies flowing in a channel often exhibit parachutelike shapes usually attributed to an increase of hydrodynamic constraint (viscous stress and/or confinement). We show that the presence of a fluid membrane leads to the reverse phenomenon and build a phase diagram of shapes-which are classified as bullet, croissant, and parachute-in channels of varying aspect ratio. Unexpectedly, shapes are relatively wider in the narrowest direction of the channel. We highlight the role of flow patterns on the membrane in this response to the asymmetry of stress distribution. PMID:22680911

  12. Shape Diagram of Vesicles in Poiseuille Flow

    NASA Astrophysics Data System (ADS)

    Coupier, Gwennou; Farutin, Alexander; Minetti, Christophe; Podgorski, Thomas; Misbah, Chaouqi

    2012-04-01

    Soft bodies flowing in a channel often exhibit parachutelike shapes usually attributed to an increase of hydrodynamic constraint (viscous stress and/or confinement). We show that the presence of a fluid membrane leads to the reverse phenomenon and build a phase diagram of shapes—which are classified as bullet, croissant, and parachute—in channels of varying aspect ratio. Unexpectedly, shapes are relatively wider in the narrowest direction of the channel. We highlight the role of flow patterns on the membrane in this response to the asymmetry of stress distribution.

  13. Calculation of superalloy phase diagrams: Part III

    Microsoft Academic Search

    Larry Kaufman; Harvey Nesor

    1975-01-01

    Previously computed descriptions of binary systems have been employed to calculate isothermal sections in the Ni-Nb-W, Nb-Cr-Ti,\\u000a Cr-Ti-Fe and Nb-Ni-Al systems which compare favorably with limited experimental data. Explicit descriptions of the Co-Mo,\\u000a Co-W, Co-Ti, Co-Nb, Co-Al and Co-Cr systems have been developed in line with lattice stability, thermochemical and phase diagram\\u000a data to permit calculation of cobalt-base superalloy systems.

  14. Shape diagram of vesicles in Poiseuille flow

    E-print Network

    Gwennou Coupier; Alexander Farutin; Christophe Minetti; Thomas Podgorski; Chaouqi Misbah

    2012-03-20

    Soft bodies flowing in a channel often exhibit parachute-like shapes usually attributed to an increase of hydrodynamic constraint (viscous stress and/or confinement). We show that the presence of a fluid membrane leads to the reverse phenomenon and build a phase diagram of shapes --- which are classified as bullet, croissant and parachute --- in channels of varying aspect ratio. Unexpectedly, shapes are relatively wider in the narrowest direction of the channel. We highlight the role of flow patterns on the membrane in this response to the asymmetry of stress distribution.

  15. The QCD Phase Diagram with Effective Theories

    E-print Network

    Ydalia Delgado; Hans Gerd Evertz; Christof Gattringer; Daniel Göschl

    2011-11-03

    We study two effective theories for QCD at non-zero temperature and finite chemical potential, using local Polyakov loops as the degrees of freedom. The sign problem is solved by exactly mapping the partition function to a sum over flux and monomer variables with only real and positive weights, making the two models accessible to Monte Carlo simulation techniques. We use generalized worm algorithms and a local Metropolis update to perform the simulations and determine the phase diagram as a function of the temperature and the chemical potential.

  16. Iodine prophylaxis and nuclear accidents.

    PubMed

    Frani?, Z

    1999-06-01

    Due to high volatility and environmental mobility, radioactive isotopes of iodine pose a serious risk in the acute phases of a nuclear accident. The critical organ for iodine is the thyroid. A number of studies dealing with thyroid protection from exposure to radioiodine have shown that radioiodine uptake by the thyroid can be effectively blocked by administration of stable iodine, usually in the form of potassium iodide (KI) pills. However, unless perfectly timed, this protective action may be counterproductive. The International Atomic Energy Agency recommends potassium iodide prophylaxis in cases when an avertable thyroid dose by protective action exceeds 100 mGy. This paper reviews experiences and practices with potassium iodide in the thyroid protection. This kind of information should serve as the basis for discussion and decision making on KI prophylactic programmes in nuclear emergency situations in Croatia. If Croatia adopts such programme, it will still have to develop the most effective way of KI stockpiling and distribution or predistribution. PMID:10566200

  17. Structural assessment of accident loads

    SciTech Connect

    Wagenblast, G.R., Westinghouse Hanford

    1996-05-28

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

  18. Shuttle accident stalls science plans

    NASA Astrophysics Data System (ADS)

    Katzoff, Judith A.

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

  19. Risk of accidents in drivers with epilepsy

    Microsoft Academic Search

    J Taylor; D Chadwick; T Johnson

    1996-01-01

    OBJECTIVE--To estimate the risks of road traffic accidents over a period of three years in drivers with a history of single seizures or epilepsy, and to compare them with a cohort of drivers followed up by the Transport Research Laboratory (TRL). DESIGN--A retrospective survey of driving and accident experience by self-completion questionnaire. SUBJECTS--16,958 drivers with a previous history of epilepsy

  20. Severe accident testing of electrical penetration assemblies

    SciTech Connect

    Clauss, D.B. (Sandia National Labs., Albuquerque, NM (USA))

    1989-11-01

    This report describes the results of tests conducted on three different designs of full-size electrical penetration assemblies (EPAs) that are used in the containment buildings of nuclear power plants. The objective of the tests was to evaluate the behavior of the EPAs under simulated severe accident conditions using steam at elevated temperature and pressure. Leakage, temperature, and cable insulation resistance were monitored throughout the tests. Nuclear-qualified EPAs were produced from D. G. O'Brien, Westinghouse, and Conax. Severe-accident-sequence analysis was used to generate the severe accident conditions (SAC) for a large dry pressurized-water reactor (PWR), a boiling-water reactor (BWR) Mark I drywell, and a BWR Mark III wetwell. Based on a survey conducted by Sandia, each EPA was matched with the severe accident conditions for a specific reactor type. This included the type of containment that a particular EPA design was used in most frequently. Thus, the D. G. O'Brien EPA was chosen for the PWR SAC test, the Westinghouse was chosen for the Mark III test, and the Conax was chosen for the Mark I test. The EPAs were radiation and thermal aged to simulate the effects of a 40-year service life and loss-of-coolant accident (LOCA) before the SAC tests were conducted. The design, test preparations, conduct of the severe accident test, experimental results, posttest observations, and conclusions about the integrity and electrical performance of each EPA tested in this program are described in this report. In general, the leak integrity of the EPAs tested in this program was not compromised by severe accident loads. However, there was significant degradation in the insulation resistance of the cables, which could affect the electrical performance of equipment and devices inside containment at some point during the progression of a severe accident. 10 refs., 165 figs., 16 tabs.

  1. All-terrain vehicle accidents in Maine.

    PubMed

    Margolis, J L

    1988-03-01

    All-terrain vehicles (ATV) are designed for off-road vocational or recreational use. Their popularity has increased steadily, but only recently has information accumulated concerning morbidity and mortality associated with the use of these vehicles. The 221 ATV accidents reported in Maine during 1985 are reviewed to more fully characterize the trauma associated with ATV accidents. These data are compared with reports from other geographical areas and recommendations made regarding ATV use. PMID:3351997

  2. Anthropotechnological analysis of industrial accidents in Brazil.

    PubMed Central

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

    1999-01-01

    The Brazilian Ministry of Labour has been attempting to modify the norms used to analyse industrial accidents in the country. For this purpose, in 1994 it tried to make compulsory use of the causal tree approach to accident analysis, an approach developed in France during the 1970s, without having previously determined whether it is suitable for use under the industrial safety conditions that prevail in most Brazilian firms. In addition, opposition from Brazilian employers has blocked the proposed changes to the norms. The present study employed anthropotechnology to analyse experimental application of the causal tree method to work-related accidents in industrial firms in the region of Botucatu, São Paulo. Three work-related accidents were examined in three industrial firms representative of local, national and multinational companies. On the basis of the accidents analysed in this study, the rationale for the use of the causal tree method in Brazil can be summarized for each type of firm as follows: the method is redundant if there is a predominance of the type of risk whose elimination or neutralization requires adoption of conventional industrial safety measures (firm representative of local enterprises); the method is worth while if the company's specific technical risks have already largely been eliminated (firm representative of national enterprises); and the method is particularly appropriate if the firm has a good safety record and the causes of accidents are primarily related to industrial organization and management (multinational enterprise). PMID:10680249

  3. Low level waste shipment accident lessons learned

    SciTech Connect

    Rast, D.M.; Rowe, J.G.; Reichel, C.W.

    1995-02-01

    On October 1, 1994 a shipment of low-level waste from the Fernald Environmental Management Project, Fernald, Ohio, was involved in an accident near Rolla, Missouri. The accident did not result in the release of any radioactive material. The accident did generate important lessons learned primarily in the areas of driver and emergency response communications. The shipment was comprised of an International Standards Organization (ISO) container on a standard flatbed trailer. The accident caused the low-level waste package to separate from the trailer and come to rest on its top in the median. The impact of the container with the pavement and median inflicted relatively minor damage to the container. The damage was not substantial enough to cause failure of container integrity. The success of the package is attributable to the container design and the packaging procedures used at the Fernald Environmental Management Project for low-level waste shipments. Although the container survived the initial wreck, is was nearly breached when the first responders attempted to open the ISO container. Even though the container was clearly marked and the shipment documentation was technically correct, this information did not identify that the ISO container was the primary containment for the waste. The lessons learned from this accident have DOE complex wide applicability. This paper is intended to describe the accident, subsequent emergency response operations, and the lessons learned from this incident.

  4. Automatic Construction of Timing Diagrams from UML/MARTE Models for Real-Time Embedded Software

    E-print Network

    Jee, Eunkyoung

    Automatic Construction of Timing Diagrams from UML/MARTE Models for Real-Time Embedded Software sequence diagrams and state machine diagrams with MARTE annotations. The proposed approach enables de--Methodologies Keywords UML, MARTE, timing diagram, state machine diagram, se- quence diagram, real-time embedded software

  5. Critical point analysis of phase envelope diagram

    SciTech Connect

    Soetikno, Darmadi; Siagian, Ucok W. R. [Department of Petroleum Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132 (Indonesia); Kusdiantara, Rudy, E-mail: rkusdiantara@s.itb.ac.id; Puspita, Dila, E-mail: rkusdiantara@s.itb.ac.id; Sidarto, Kuntjoro A., E-mail: rkusdiantara@s.itb.ac.id; Soewono, Edy; Gunawan, Agus Y. [Department of Mathematics, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132 (Indonesia)

    2014-03-24

    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.

  6. Critical point analysis of phase envelope diagram

    NASA Astrophysics Data System (ADS)

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

    2014-03-01

    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.

  7. Instability Regions in the Upper HR Diagram

    NASA Technical Reports Server (NTRS)

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

    2001-01-01

    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.

  8. Phase diagram of electron-doped dichalcogenides

    NASA Astrophysics Data System (ADS)

    Rösner, M.; Haas, S.; Wehling, T. O.

    2014-12-01

    Using first-principle calculations, we examine the sequence of phases in electron-doped dichalcogenides, such as recently realized in field-gated MoS2. Upon increasing the electron-doping level, we observe a succession of semiconducting, metallic, superconducting, and charge density wave regimes, i.e., in different order compared to the phase diagram of metallic dichalcogenides, such as TiSe2. Both instabilities trace back to a softening of phonons, which couple the electron populated conduction band minima. The superconducting dome, calculated using Eliashberg theory, is found to fit the experimentally observed phase diagram, obtained from resistivity measurements. The charge density wave phase at higher electron doping concentrations as predicted from instabilities in the phonon modes is further corroborated by detecting the accompanying lattice deformation in density-functional-based supercell relaxations. Upon charge density wave formation, doped MoS2 remains metallic but undergoes a Lifschitz transition, where the number of Fermi pockets is reduced.

  9. Revisiting the phase diagram of hard ellipsoids.

    PubMed

    Odriozola, Gerardo

    2012-04-01

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

  10. Magnetic phase diagrams of UNiGe

    SciTech Connect

    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

    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

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

    ERIC Educational Resources Information Center

    de Freitas, Elizabeth

    2012-01-01

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

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

    SciTech Connect

    Billings, A; Tommy Edwards, T

    2009-03-03

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

  13. Lockout/tagout accident investigation.

    PubMed

    White, James R

    2014-08-01

    When I was in boot camp, our drill instructor told us that assume makes an ass out of u and me. It was true then, and it is true today. In this instance, assumptions came into play several times, both by the worker and by the companies involved. The good news is that it did not result in a fatality, but that does not relieve the pain and suffering that the employee had to endure. This same type of scenario is likely repeated at many job sites throughout the United States. Multiple contractors, dozens--maybe hundreds--of workers, power system equipment and devices; all of these have to be taken into consideration when performing maintenance activities. It can become a blur. People are people, and people make mistakes. That is why we have OSHA regulations, NFPA 70E, company procedures, policies, etc. Most if not all of us have either been involved in accidents or know people who have been. It's not like it's a secret that people make mistakes, but talk to some and they seem to think only others have that failing. Safety is not about just any one procedure or rule. It's about slowing down, making a plan, and executing that plan. There are plenty of tools available to help us: policies, procedures, codes, standards, federal regulations, and state and local laws. I am not about to say that the worker involved in this incident was not taking safety seriously, but he failed to follow some fundamental safety rules like test-before-touch. If he had taken just that one step, there would be nothing to write about. PMID:25188988

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

    NASA Astrophysics Data System (ADS)

    Jian, Yu-Cin; Wu, Chao-Jung

    2015-02-01

    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.

  15. Aerosol Monitoring and Early Detection of Pre-Accident and Accident Situations

    Microsoft Academic Search

    P. A. Aleksandrov; V. I. Kalechits; O. Yu. Maslakov

    2000-01-01

    The possibility of using the instrumentation methods and methodological approachs, developed for clean-room technology, in systems for early detection of accidents and for diagnostics of pre-accident situations by monitoring the aerosol composition of room air is analyzed. The results of experimental investigations of the dynamics of the variation of the number density and dispersion composition of aerosol particles, produced during

  16. Duals of Orphan-Free Anisotropic Voronoi Diagrams are Triangulations

    E-print Network

    Canas, Guillermo D

    2011-01-01

    We show that, under mild conditions on the underlying metric, duals of appropriately defined anisotropic Voronoi diagrams are embedded triangulations. Furthermore, they always triangulate the convex hull of the vertices, and have other properties that parallel those of ordinary Delaunay triangulations. These results apply to the duals of anisotropic Voronoi diagrams of any set of vertices, so long as the diagram is orphan-free.

  17. A Controlled Experiment for Validating Class Diagram Structural Complexity Metrics

    Microsoft Academic Search

    Marcela Genero; Luis Jiménez; Mario Piattini

    2002-01-01

    Measuring quality is the key to developing high-quality software, and it is widely recognised that quality assurance of software\\u000a products must be assessed focusing on early artifacts, such as class diagrams. After having thoroughly reviewed existing OO\\u000a measures applicable to class diagrams at a high-level design stage, a set of metrics for the structural complexity of class\\u000a diagrams obtained using

  18. 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

  19. 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

  20. 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

  1. On Earthquake Predictability Measurement: Information Score and Error Diagram

    NASA Astrophysics Data System (ADS)

    Kagan, Yan Y.

    2007-10-01

    We discuss two methods for measuring the effectiveness of earthquake prediction algorithms: The information score based on the likelihood ratio and error diagrams. For both of these methods, closed form expressions are obtained for the renewal process based on the gamma and lognormal distributions. The error diagram is more informative than the likelihood ratio and uniquely specifies the information score. We derive an expression connecting the information score and error diagrams. We then obtain the estimate of the region bounds in the error diagram for any value of the information score. We discuss how these preliminary results can be extended for more realistic models of earthquake occurrence.

  2. Massive basketball diagram for a thermal scalar field theory

    SciTech Connect

    Andersen, Jens O. [Physics Department, Ohio State University, Columbus, Ohio 43210 (United States)] [Physics Department, Ohio State University, Columbus, Ohio 43210 (United States); Braaten, Eric [Physics Department, Ohio State University, Columbus, Ohio 43210 (United States)] [Physics Department, Ohio State University, Columbus, Ohio 43210 (United States); Strickland, Michael [Physics Department, University of Washington, Seattle, Washington 98195-1560 (United States)] [Physics Department, University of Washington, Seattle, Washington 98195-1560 (United States)

    2000-08-15

    The ''basketball diagram'' is a three-loop vacuum diagram for a scalar field theory that cannot be expressed in terms of one-loop diagrams. We calculate this diagram for a massive scalar field at nonzero temperature, reducing it to expressions involving three-dimensional integrals that can be easily evaluated numerically. We use this result to calculate the free energy for a massive scalar field with a {phi}{sup 4} interaction to three-loop order. (c) 2000 The American Physical Society.

  3. Visualization design and verification of Ada tasking using timing diagrams

    NASA Technical Reports Server (NTRS)

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

    1986-01-01

    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.

  4. Pattern of accident distribution in the telecommunications industry.

    PubMed Central

    Davis, P R; Sheppard, N J

    1980-01-01

    Examination of the accident records from the telecommunication industry covering some 100 000 engineers over a 12-month period showed that 25% of accidents resulting in more than three days' sick leave gave rise to back injuries. Handling accidents and falls accounted for 65% of three-day-plus accidents; handling accidents alone gave rise to 65% of back injuries. The absolute numbers of accidents have been compared with the total population of engineers to estimate the effects of age or occupation on levels of hazard; certain occupations constituting 33% of the engineers' population suffered 70% of all three-day-plus accidents. Accidents occurred most frequently in the group aged from 31 to 48 years. Other significant factors affecting the occurrence of accidents were time of year and duty experience of the workers. PMID:7426467

  5. Phase diagram of nondegenerate twisted mass fermions

    NASA Astrophysics Data System (ADS)

    Horkel, Derek P.; Sharpe, Stephen R.

    2014-11-01

    We determine the phase diagram and pion spectrum for Wilson and twisted-mass fermions in the presence of nondegeneracy between the up and down quarks and discretization errors, using Wilson and twisted-mass chiral perturbation theory. We find that the C P -violating phase of the continuum theory (which occurs for sufficiently large nondegeneracy) is continuously connected to the Aoki phase of the lattice theory with degenerate quarks. We show that discretization effects can, in some cases, push simulations with physical masses closer to either the C P -violating phase or another phase not present in the continuum, so that at sufficiently large lattice spacings physical-point simulations could lie in one of these phases.

  6. Bayesian Image Reconstruction Based on Voronoi Diagrams

    E-print Network

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

    2007-12-26

    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.

  7. Cuts and coproducts of massive triangle diagrams

    E-print Network

    Abreu, Samuel; Grönqvist, Hanna

    2015-01-01

    Relations between multiple unitarity cuts and coproducts of Feynman integrals are extended to allow for internal masses. These masses introduce new branch cuts, whose discontinuities can be derived by placing single propagators on shell and identified as particular entries of the coproduct. First entries of the coproduct are then seen to include mass invariants alone, as well as threshold corrections for external momentum channels. As in the massless case, the original integral can possibly be recovered from its cuts by starting with the known part of the coproduct and imposing integrability contraints. We formulate precise rules for cuts of diagrams, and we gather evidence for the relations to coproducts through a detailed study of one-loop triangle integrals with various combinations of external and internal masses.

  8. Improving perturbation theory with cactus diagrams

    E-print Network

    Constantinou, M; Skouroupathis, A; Constantinou, Martha; Panagopoulos, Haralambos; Skouroupathis, Apostolos

    2006-01-01

    We study a systematic improvement of perturbation theory for gauge fields on the lattice [hep-lat/0606001]; the improvement entails resumming, to all orders in the coupling constant, a dominant subclass of tadpole diagrams. This method, originally proposed for the Wilson gluon action, is extended here to encompass all possible gluon actions made of closed Wilson loops; any fermion action can be employed as well. The effect of resummation is to replace various parameters in the action (coupling constant, Symanzik and clover coefficient) by ``dressed'' values; the latter are solutions to certain coupled integral equations, which are easy to solve numerically. Some positive features of this method are: a) It is gauge invariant, b) it can be systematically applied to improve (to all orders) results obtained at any given order in perturbation theory, c) it does indeed absorb in the dressed parameters the bulk of tadpole contributions. Two different applications are presented: The additive renormalization of fermio...

  9. $J/?$ suppression and QCD phase diagram

    E-print Network

    A. K. Chaudhuri; Partha Pratim Bhaduri

    2012-04-03

    QCD phase diagram is obtained by analysing centrality dependence of $J/\\psi$ suppression in $\\snn$=17.3 Pb+Pb and $\\snn$=200 GeV Au+Au collisions. $J/\\psi$'s produced in initial interactions are assumed to dissolve if local temperature exceeds a threshold temperature. The threshold temperature depends on the (local) fluid temperature and baryonic chemical potential, which are obtained, under certain assumptions, from experimentally determined quantities e.g. rapidity density, net baryon density. QCD critical line with curvature parameter $\\kappa\\approx 0.018-0.23$ is consistent with experimental $J/\\psi$ data. $\\kappa$ is factor of $\\sim$3 larger than in lattice QCD calculations.

  10. Continuous phase diagrams of complex material systems

    NASA Astrophysics Data System (ADS)

    Yoo, Young-Kook K.

    High throughput and systematic study of complex material systems is described. Initial efforts using thin film discrete material chips are briefly reviewed in perspective of material discovery and optimization. We then focus our discussion to the experimental technique of epitaxial thin film growth "continuous phase diagram" (CPD) and mapping its physical properties in two different material systems; perovskite manganese oxides and Ni1-xFe x metal alloy. In the former, we discuss the results of mapping optical, electrical, and magnetic properties of manganese oxides as functions of doping concentration, ionic radius, etc. We discuss the surprising evidences that suggest various electronic phase transitions, such as orbital orderings and smectic phase formation, in this highly correlated electronic system. In Ni 1-xFex metal alloy, we discuss a different application of CPD to describe the structure-property relation of a traditional materials science.

  11. Band diagrams of layered plasmonic metamaterials

    NASA Astrophysics Data System (ADS)

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

    2014-11-01

    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.

  12. NASA Medical Response to Human Spacecraft Accidents

    NASA Technical Reports Server (NTRS)

    Patlach, Robert

    2011-01-01

    This slide presentation reviews NASA's role in the response to spacecraft accidents that involve human fatalities or injuries. Particular attention is given to the work of the Mishap Investigation Team (MIT), the first response to the accidents and the interface to the accident investigation board. The MIT does not investigate the accident, but the objective of the MIT is to gather, guard, preserve and document the evidence. The primary medical objectives of the MIT is to receive, analyze, identify, and transport human remains, provide assistance in the recovery effort, and to provide family Casualty Coordinators with latest recovery information. The MIT while it does not determine the cause of the accident, it acts as the fact gathering arm of the Mishap Investigation Board (MIB), which when it is activated may chose to continue to use the MIT as its field investigation resource. The MIT membership and the specific responsibilities and tasks of the flight surgeon is reviewed. The current law establishing the process is also reviewed.

  13. Accidents and injuries in patients with epilepsy.

    PubMed

    Beghi, Ettore

    2009-02-01

    People with pilepsy are thought to be at an increased risk of accidents and injuries. This results in stigmatization of patients with epilepsy and contributes to a number of limitations in their daily living activities. However, even with differing results, several observational studies (including a large multicenter European survey) report that most accidental injuries are minor and are mostly caused by an epileptogenic clinical condition, an associated handicap or the recurrence of seizures. Domestic, street and work accidents are, in decreasing order, the most common places for such injuries to occur. Contusions and wounds are the most common injuries, followed by abrasions, fractures, brain concussions, sprains/strains and burns. Associated handicaps and comorbidity, where present, as well as antiepileptic drugs, may cause accidents and injuries by impairing cognitive functions and increasing the patient's susceptibility to suffer from the complications of injuries. Patients with epilepsy are also at a slightly higher risk of accidental death than the general population; accidental causes include fires and flames, drowning, suffocation, foreign bodies, falls, suicide and transport accidents. When epileptogenic conditions and seizure-related events are excluded, patients with epilepsy are only at a slightly greater risk of accidents and injuries than the general population. PMID:19210202

  14. Single pilot IFR accident data analysis

    NASA Technical Reports Server (NTRS)

    Harris, D. F.; Morrisete, J. A.

    1982-01-01

    The aircraft accident data recorded and maintained by the National Transportation Safety Board for 1964 to 1979 were analyzed to determine what problems exist in the general aviation single pilot instrument flight rules environment. A previous study conducted in 1978 for the years 1964 to 1975 provided a basis for comparison. The purpose was to determine what changes, if any, have occurred in trends and cause-effect relationships reported in the earlier study. The increasing numbers have been tied to measures of activity to produce accident rates which in turn were analyzed in terms of change. Where anomalies or unusually high accident rates were encountered, further analysis was conducted to isolate pertinent patterns of cause factors and/or experience levels of involved pilots. The bulk of the effort addresses accidents in the landing phase of operations. A detailed analysis was performed on controlled/uncontrolled collisions and their unique attributes delineated. Estimates of day vs. night general aviation activity and accident rates were obtained.

  15. Under-reporting of maritime accidents.

    PubMed

    Psarros, George; Skjong, Rolf; Eide, Magnus Strandmyr

    2010-03-01

    The majority of current maritime regulations has been developed following a reactive approach, often as ad-hoc response to serious accidents, and are characterised as being prescriptive leaving limited space for adapting equivalent solutions rather those described in the regulations. On the premise of providing a more proactive approach for the proposal or the evaluation of regulations, the Formal Safety Assessment (FSA) has been introduced. In the context of FSA, the analysis of accident data is considered to be very important for providing potential input on developing more balanced, proactive and cost-effective regulations. However, it has been argued that the validity of historical data may be undermined by uncertainties. This paper is aimed at showing evidence on serious under-reporting in accident databases, which can be considered as the main contributor to questioning the direct and uncritical use of historical data. By analysing the 10-year tanker accident data from the Lloyd's Register FairPlay (LRFP) and the Norwegian Maritime Directorate (NMD) for vessels registered in Norway, it is found that the reporting performance has an upper bound of 41% for NMD and 30% for LRFP. Furthermore, based on comparison between LRFP data and self-assessment by Flag States, it is seen that accidents reported by the Flag States are also incomplete. PMID:20159087

  16. The three essentials for accident prevention.

    PubMed

    Eastman, Crystal

    2014-01-01

    This article was written by Crystal Eastman when she was Secretary of the New York Commission on Employers' Liability and Causes of Industrial Accidents, Unemployment, and Lack of Farm Labor. It was published in July of 1911, in Volume 38, Number 1 of the Annals of the American Academy of Political and Social Science, pages 98-107. The issue title was "Risks in Modern Industry." Eastman calls for the prevention of workplace accidents through three essentials: injury surveillance/reporting (with annual public reporting of the data); government enforcement of accident prevention laws, via departments with well-paid and well-trained officials and inspectors, fines that are high enough to be a deterrence to employers, and the power to have police shut down a factory if preventive measures are not installed; and a workers' compensation system-"a system of liability by which an employer can reduce his accident costs, not by hiring a more unscrupulous attorney and a more hard-hearted claim agent, but only by reducing his accidents." PMID:25261022

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

    SciTech Connect

    Fellows, R.L. [ed.

    1993-02-26

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

  18. A Review of Criticality Accidents 2000 Revision

    SciTech Connect

    Thomas P. McLaughlin; Shean P. Monahan; Norman L. Pruvost; Vladimir V. Frolov; Boris G. Ryazanov; Victor I. Sviridov

    2000-05-01

    Criticality accidents and the characteristics of prompt power excursions are discussed. Sixty accidental power excursions are reviewed. Sufficient detail is provided to enable the reader to understand the physical situation, the chemistry and material flow, and when available the administrative setting leading up to the time of the accident. Information on the power history, energy release, consequences, and causes are also included when available. For those accidents that occurred in process plants, two new sections have been included in this revision. The first is an analysis and summary of the physical and neutronic features of the chain reacting systems. The second is a compilation of observations and lessons learned. Excursions associated with large power reactors are not included in this report.

  19. Workshop on iodine releases in reactor accidents

    SciTech Connect

    Not Available

    1980-11-01

    Principal conclusions from the workshop can be summarized: Observed environmental releases of iodine from actual reactor accidents are several factors of 10 smaller than those predicted by licensing bases. The presence of water apparently prevents large fractions of iodine released from fuel from being airborne, either inside or outside containments or other enclosures. There is evidence that with fuel overheating in a loss-of-coolant accident iodine will be released mainly as cesium iodide, a thermodynamically stable substance which dissolves in water. Exaggerated estimates of potential accident releases can contribute to unfounded actions by public officials and unwarranted physical and mental stress damage to the public. Ten presentations were made at the workshop. These presentations are summarized and the viewographs used are given in this document. Separate abstracts were prepared for three presentations. (DCL)

  20. Nuclear fuel in a reactor accident.

    PubMed

    Burns, Peter C; Ewing, Rodney C; Navrotsky, Alexandra

    2012-03-01

    Nuclear accidents that lead to melting of a reactor core create heterogeneous materials containing hundreds of radionuclides, many with short half-lives. The long-lived fission products and transuranium elements within damaged fuel remain a concern for millennia. Currently, accurate fundamental models for the prediction of release rates of radionuclides from fuel, especially in contact with water, after an accident remain limited. Relatively little is known about fuel corrosion and radionuclide release under the extreme chemical, radiation, and thermal conditions during and subsequent to a nuclear accident. We review the current understanding of nuclear fuel interactions with the environment, including studies over the relatively narrow range of geochemical, hydrological, and radiation environments relevant to geological repository performance, and discuss priorities for research needed to develop future predictive models. PMID:22403382

  1. Predicting road accidents: Structural time series approach

    NASA Astrophysics Data System (ADS)

    Junus, Noor Wahida Md; Ismail, Mohd Tahir

    2014-07-01

    In this paper, the model for occurrence of road accidents in Malaysia between the years of 1970 to 2010 was developed and throughout this model the number of road accidents have been predicted by using the structural time series approach. The models are developed by using stepwise method and the residual of each step has been analyzed. The accuracy of the model is analyzed by using the mean absolute percentage error (MAPE) and the best model is chosen based on the smallest Akaike information criterion (AIC) value. A structural time series approach found that local linear trend model is the best model to represent the road accidents. This model allows level and slope component to be varied over time. In addition, this approach also provides useful information on improving the conventional time series method.

  2. Bundled automobile insurance coverage and accidents.

    PubMed

    Li, Chu-Shiu; Liu, Chwen-Chi; Peng, Sheng-Chang

    2013-01-01

    This paper investigates the characteristics of automobile accidents by taking into account two types of automobile insurance coverage: comprehensive vehicle physical damage insurance and voluntary third-party liability insurance. By using a unique data set in the Taiwanese automobile insurance market, we explore the bundled automobile insurance coverage and the occurrence of claims. It is shown that vehicle physical damage insurance is the major automobile coverage and affects the decision to purchase voluntary liability insurance coverage as a complement. Moreover, policyholders with high vehicle physical damage insurance coverage have a significantly higher probability of filing vehicle damage claims, and if they additionally purchase low voluntary liability insurance coverage, their accident claims probability is higher than those who purchase high voluntary liability insurance coverage. Our empirical results reveal that additional automobile insurance coverage information can capture more driver characteristics and driving behaviors to provide useful information for insurers' underwriting policies and to help analyze the occurrence of automobile accidents. PMID:23200441

  3. Assessment of CRBR core disruptive accident energetics

    SciTech Connect

    Theofanous, T.G.; Bell, C.R.

    1984-03-01

    The results of an independent assessment of core disruptive accident energetics for the Clinch River Breeder Reactor are presented in this document. This assessment was performed for the Nuclear Regulatory Commission under the direction of the CRBR Program Office within the Office of Nuclear Reactor Regulation. It considered in detail the accident behavior for three accident initiators that are representative of three different classes of events; unprotected loss of flow, unprotected reactivity insertion, and protected loss of heat sink. The primary system's energetics accommodation capability was realistically, yet conservatively, determined in terms of core events. This accommodation capability was found to be equivalent to an isentropic work potential for expansion to one atmosphere of 2550 MJ or a ramp rate of about 200 $/s applied to a classical two-phase disassembly.

  4. Structural aspects of the Chernobyl accident

    SciTech Connect

    Murray, R.C.; Cummings, G.E.

    1988-09-02

    On April 26, 1986 the world's worst nuclear power plant accident occurred at the Unit 4 of the Chernobyl Nuclear Power Station in the USSR. This paper presents a discussion of the design of the Chernobyl Power Plant, the sequence of events that led to the accident and the damage caused by the resulting explosion. The structural design features that contributed to the accident and resulting damage will be highlighted. Photographs and sketches obtained from various worldwide news agencies will be shown to try and gain a perspective of the extent of the damage. The aftermath, clean-up, and current situation will be discussed and the important lessons learned for the structural engineer will be presented. 15 refs., 10 figs.

  5. Reconfigurable mobile manipulation for accident response

    SciTech Connect

    ANDERSON,ROBERT J.; MORSE,WILLIAM D.; SHIREY,DAVID L.; CDEBACA,DANIEL M.; HOFFMAN JR.,JOHN P.; LUCY,WILLIAM E.

    2000-06-06

    The need for a telerobotic vehicle with hazard sensing and integral manipulation capabilities has been identified for use in transportation accidents where nuclear weapons are involved. The Accident Response Mobile Manipulation System (ARMMS) platform has been developed to provide remote dexterous manipulation and hazard sensing for the Accident Response Group (ARG) at Sandia National Laboratories. The ARMMS' mobility platform is a military HMMWV [High Mobility Multipurpose Wheeled Vehicle] that is teleoperated over RF or Fiber Optic communication channels. ARMMS is equipped with two high strength Schilling Titan II manipulators and a suite of hazardous gas and radiation sensors. Recently, a modular telerobotic control architecture call SMART (Sandia Modular Architecture for Robotic and Teleoperation) has been applied to ARMMS. SMART enables input devices and many system behaviors to be rapidly configured in the field for specific mission needs. This paper summarizes current SMART developments applied to ARMMS.

  6. The Chernobyl accident and its consequences.

    PubMed

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

    2011-05-01

    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 estimated quickly. Even though some studies have now been ongoing for 25 years and have provided a better understanding of the situation, these are yet neither complete nor comprehensive enough to determine the long-term risk. A true assessment can only be provided after following the observed population for their natural lifespan. Here we review the technical aspects of the accident and provide relevant information on radioactive releases that resulted in exposure of this large population to radiation. A number of different groups of people were exposed to radiation: workers involved in the initial clean-up response, and members of the general population who were either evacuated from the settlements in the Chernobyl nuclear power plant vicinity shortly after the accident, or continued to live in the affected territories of Belarus, Russia and Ukraine. Through domestic efforts and extensive international co-operation, essential information on radiation dose and health status for this population has been collected. This has permitted the identification of high-risk groups and the use of more specialised means of collecting information, diagnosis, treatment and follow-up. Because radiation-associated thyroid cancer is one of the major health consequences of the Chernobyl accident, a particular emphasis is placed on this malignancy. The initial epidemiological studies are reviewed, as are the most significant studies and/or aid programmes in the three affected countries. PMID:21345660

  7. Accident progression event tree analysis for postulated severe accidents at N Reactor

    SciTech Connect

    Wyss, G.D.; Camp, A.L.; Miller, L.A.; Dingman, S.E.; Kunsman, D.M. (Sandia National Labs., Albuquerque, NM (USA)); Medford, G.T. (Science Applications International Corp., Albuquerque, NM (USA))

    1990-06-01

    A Level II/III probabilistic risk assessment (PRA) has been performed for N Reactor, a Department of Energy (DOE) production reactor located on the Hanford reservation in Washington. The accident progression analysis documented in this report determines how core damage accidents identified in the Level I PRA progress from fuel damage to confinement response and potential releases the environment. The objectives of the study are to generate accident progression data for the Level II/III PRA source term model and to identify changes that could improve plant response under accident conditions. The scope of the analysis is comprehensive, excluding only sabotage and operator errors of commission. State-of-the-art methodology is employed based largely on the methods developed by Sandia for the US Nuclear Regulatory Commission in support of the NUREG-1150 study. The accident progression model allows complex interactions and dependencies between systems to be explicitly considered. Latin Hypecube sampling was used to assess the phenomenological and systemic uncertainties associated with the primary and confinement system responses to the core damage accident. The results of the analysis show that the N Reactor confinement concept provides significant radiological protection for most of the accident progression pathways studied.

  8. Accident tolerant fuels for LWRs: A perspective

    NASA Astrophysics Data System (ADS)

    Zinkle, S. J.; Terrani, K. A.; Gehin, J. C.; Ott, L. J.; Snead, L. L.

    2014-05-01

    The motivation for exploring the potential development of accident tolerant fuels in light water reactors to replace existing Zr alloy clad monolithic (U, Pu) oxide fuel is outlined. The evaluation includes a brief review of core degradation processes under design-basis and beyond-design-basis transient conditions. Three general strategies for accident tolerant fuels are being explored: modification of current state-of-the-art zirconium alloy cladding to further improve oxidation resistance (including use of coatings), replacement of Zr alloy cladding with an alternative oxidation-resistant high-performance cladding, and replacement of the monolithic ceramic oxide fuel with alternative fuel forms.

  9. The medical investigation of airship accidents.

    PubMed

    Stahl, C J; McMeekin, R R; Ruehle, C J; Canik, J J

    1988-07-01

    A review of the autopsy reports for 18 of 21 victims in 3 of the 4 nonrigid Navy airship accidents during the period 1955 to 1966 revealed that the patterns of injury, complicated by postcrash entrapment, immersion, or fire, are similar to the injuries observed in the low-speed, low-altitude crashes of rigid airships and of light aircraft. With the renewed interest in the development of airships for military purposes, there is a need for improved design related to crashworthiness and to aircrew habitability, safety, restraint, and egress in order to enhance the chance for survival in the event of an accident. PMID:3171506

  10. Dose estimates from the Chernobyl accident

    SciTech Connect

    Lange, R.; Dickerson, M.H.; Gudiksen, P.H.

    1987-11-01

    The Lawrence Livermore National Laboratory Atmospheric Release Advisory Capability (ARAC) responded to the Chernobyl nuclear reactor accident in the Soviet Union by utilizing long-range atmospheric dispersion modeling to estimate the amount of radioactivity released (source term) and the radiation dose distribution due to exposure to the radioactive cloud over Europe and the Northern Hemisphere. In later assessments, after the release of data on the accident by the Soviet Union, the ARAC team used their mesoscale to regional scale model to focus in on the radiation dose distribution within the Soviet Union and the vicinity of the Chernobyl plant. 22 refs., 5 figs., 5 tabs.

  11. LESSONS LEARNED FROM A RECENT LASER ACCIDENT

    SciTech Connect

    Woods, Michael; /SLAC

    2011-01-26

    A graduate student received a laser eye injury from a femtosecond Ti:sapphire laser beam while adjusting a polarizing beam splitter optic. The direct causes for the accident included failure to follow safe alignment practices and failure to wear the required laser eyewear protection. Underlying root causes included inadequate on-the-job training and supervision, inadequate adherence to requirements, and inadequate appreciation for dimly visible beams outside the range of 400-700nm. This paper describes how the accident occurred, discusses causes and lessons learned, and describes corrective actions being taken.

  12. Representational Correspondence as a Basic Principle of Diagram Design

    Microsoft Academic Search

    Christopher F. Chabris; Stephen M. Kosslyn

    2005-01-01

    The timeworn claim that a picture is worth a thousand words is generally well-supported by empirical evidence, suggesting that diagrams and other information graphics can enhance human cognitive capacities in a wide range of contexts and applications. But not every picture is worth the space it occupies. What qualities make a diagram an effective and efficient conduit of information to

  13. Diagrams in Mathematics: To Draw or Not to Draw?

    ERIC Educational Resources Information Center

    Mudaly, Vimolan

    2012-01-01

    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…

  14. Using Cabri3D Diagrams for Teaching Geometry

    ERIC Educational Resources Information Center

    Accascina, Giuseppe; Rogora, Enrico

    2006-01-01

    Cabri3D is a potentially very useful software for learning and teaching 3D geometry. The dynamic nature of the digital diagrams produced with it provides a useful aid for helping students to better develop concept images of geometric concepts. However, since any Cabri3D diagram represents three-dimensional objects on the two dimensional screen of…

  15. Application of quaternary phase diagrams to compound semiconductor processing

    SciTech Connect

    Sinclair, R.

    1994-10-01

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

  16. UML Class Diagrams - State of the Art in Layout Techniques

    Microsoft Academic Search

    Holger Eichelberger

    Even if the standard for specifying software, the Unified Modeling Language, is known in different versions to every- body, CASE tool vendors did not implement all basic fea- tures. Even with class diagrams, many features of the stan- dard are ignored. Applying the layout algorithms of these CASE tools to the user defined diagrams, usually horrible results are produced, because

  17. Using UML Collaboration Diagrams for Static Checking and Test Generation

    E-print Network

    Offutt, Jeff

    diagrams. The most novel aspect of this is that tests can be generated automatically from the softwareUsing UML Collaboration Diagrams for Static Checking and Test Generation Aynur Abdurazik and Jeff Modeling Language (UML '00), pages 383--395, York, UK, October 2000. Abstract. Software testing can only

  18. Program comprehension: A method of generating visualized UML class diagram

    Microsoft Academic Search

    GuHui; WangHui

    2010-01-01

    Program comprehension is an important research content of software engineering. This paper presents a Program comprehension visualization method of using UML class diagram. This method has two parts, first, The program source code is abstracted into database table, the form used to summarize and express program structure and key information, Then, the table was transformed into UML class diagrams, The

  19. Composition Inference for UML Class Diagrams Ana Milanova

    E-print Network

    Bystroff, Chris

    in a tool for the reverse engineering of UML class diagrams. Firstly, recovery of composition relationshipsComposition Inference for UML Class Diagrams Ana Milanova Department of Computer Science Rensselaer-driven development. Categories and Subject Descriptors D.2.7 [Software Engineering]: Distribution, Maintenance

  20. Finite Model Reasoning on UML Class Diagrams Via Constraint Programming

    Microsoft Academic Search

    Marco Cadoli; Diego Calvanese; Giuseppe De Giacomo; Toni Mancini

    2007-01-01

    Finite model reasoning in UML class diagrams is an important task for assessing the quality of the analysis phase in the development of software applications in which it is assumed that the number of objects of the domain is finite. In this paper, we show how to encode finite model reasoning in UML class diagrams as a constraint satisfaction problem

  1. Removing Redundancies and Deducing Equivalences in UML Class Diagrams

    E-print Network

    Balaban, Mira

    TesterComputerTester 0..* 2 Evaluation EngineTransmission Feasible-Model (b) A tight class diagram, equivalent to FigRemoving Redundancies and Deducing Equivalences in UML Class Diagrams Azzam Maraee1,2 and Mira. The emerging Model-driven Engineering approach puts mod- els at the heart of the software development process

  2. A Comparative Evaluation of Tests Generated from Different UML Diagrams

    E-print Network

    Offutt, Jeff

    such as UML diagrams. When deriving tests from model-based descriptions of the software, the test engineer, Thailand supaporn.k@psu.ac.th Jeff Offutt, Aynur Abdurazik, Andrea Baldini Software Engineering George software. Sequence diagrams capture time dependent (temporal) sequences of interactions between objects

  3. An Empirical Study to Validate Metrics for Class Diagrams

    Microsoft Academic Search

    Marcela Genero; Mario Piattini; Coral Calero

    2002-01-01

    One of the principal objectives of software engineering is to improve the quality of software products. Quality assurance must be guaranteed from the early stages of the software development life cycle, focusing on high-level design artifacts like class diagrams. Indeed, class diagrams constitute the backbone of object- oriented information systems (OOIS) so, their quality has a great impact on the

  4. TIMING DIAGRAMS REQUIREMENTS MODELING USING EVENT-B FORMAL METHODS

    E-print Network

    Southampton, University of

    -B [5] is a UML-like graphical front-end for Event-B. The UML-B uses Class diagrams and Statemachines], and SynaptiCAD [10]. In general, those editors are engineering computer-aided design (CAD) software toolTIMING DIAGRAMS REQUIREMENTS MODELING USING EVENT-B FORMAL METHODS Tossaporn Joochim, Colin F

  5. A comparison of metrics for UML class diagrams

    Microsoft Academic Search

    Tong Yi; Fangjun Wu; Chengzhi Gan

    2004-01-01

    Currently, more and more research results on measuring class diagrams have been developed in literatures. In order to study these metrics systematically and deeply, this paper analyzes and compares some typical metrics for UML class diagrams from different viewpoints, different types of relationships, different types of metric values, complexity, and theoretical and empirical validation. Finally, the authors discuss their advantages

  6. Improving Students' Diagram Comprehension with Classroom Instruction

    ERIC Educational Resources Information Center

    Cromley, Jennifer G.; Perez, Tony C.; Fitzhugh, Shannon L.; Newcombe, Nora S.; Wills, Theodore W.; Tanaka, Jacqueline C.

    2013-01-01

    The authors tested whether students can be taught to better understand conventional representations in diagrams, photographs, and other visual representations in science textbooks. The authors developed a teacher-delivered, workbook-and-discussion-based classroom instructional method called Conventions of Diagrams (COD). The authors trained 1…

  7. Explore QCD Phase Diagram in High-Energy Nuclear Collisions

    E-print Network

    , Seminar, December 8th, 2009 Phase Diagram: Water Phase diagram: A map shows that, at given degrees, Seminar, December 8th, 2009 13 Bird's View of PHENIX EMCAL MuID MuTrk RICH PCs TEC/TRD DC TOF BBC MVD ZDC

  8. Adding Value to Force Diagrams: Representing Relative Force Magnitudes

    ERIC Educational Resources Information Center

    Wendel, Paul

    2011-01-01

    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…

  9. Irradiation distribution diagrams and their use for estimating collectable energy

    Microsoft Academic Search

    M Rönnelid; B Karlsson

    1997-01-01

    A method for summarising annual or seasonal solar irradiation data in irradiation distribution diagrams including both direct and diffuse irradiation is outlined. The practical use of irradiation distribution diagrams is discussed in the paper. Examples are given for the calculation of collectable irradiation on flat plate collectors or trough-like concentrators like the compound parabolic concentrator (CPC), and for the calculation

  10. Diagram, Gesture, Agency: Theorizing Embodiment in the Mathematics Classroom

    ERIC Educational Resources Information Center

    de Freitas, Elizabeth; Sinclair, Nathalie

    2012-01-01

    In this paper, we use the work of philosopher Gilles Chatelet to rethink the gesture/diagram relationship and to explore the ways mathematical agency is constituted through it. We argue for a fundamental philosophical shift to better conceptualize the relationship between gesture and diagram, and suggest that such an approach might open up new…

  11. Detecting Credit Card Fraud with Hybrid Influence Diagrams

    Microsoft Academic Search

    Barry R. Cobb

    2009-01-01

    A hybrid influence diagram is a compact graphical and numerical representation of a decision problem under uncertainty that includes both discrete and continuous chance variables. These models can be used by businesses to detect online credit card transactions that may be potentially fraudulent. By creating decision rules based on merchandise value and additional address and product characteristics, the influence diagram

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

    ERIC Educational Resources Information Center

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

    2012-01-01

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

  13. HR diagrams derived from the Michigan Spectral Catalogue

    Microsoft Academic Search

    N. Houk; R. Fesen

    1978-01-01

    The data used for the HR diagrams are taken from a volume prepared by Houk and Cowley (1975) and a second volume prepared by Houk (1978). The absolute magnitudes were taken mainly from the Landolt-Boernstein tables. The graphs provided include HR diagrams for normal stars of quality 1 and 2, and errors in HD magnitudes as a function of p.e.

  14. An explanation of the ‘granulation boundary’ in the HR diagram

    Microsoft Academic Search

    Cornelis Jager

    1990-01-01

    The granulation boundary is a line running in the HR diagram from about F0V stars to G1Ib. It divides the HR diagram in two regions in which the ‘spectral line bisector’ behaves differently. To the right (cooler stars) the Fraunhofer lines in stellar spectra show the characteristics typical for convective motions. For hot stars it indicates the presence of large

  15. Diagram This Headline in One Minute, if You Can

    ERIC Educational Resources Information Center

    Landecker, Heidi

    2009-01-01

    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…

  16. CROSSING CHANGES AND MINIMAL DIAGRAMS ISABEL K. DARCY

    E-print Network

    Darcy, Isabel K.

    CROSSING CHANGES AND MINIMAL DIAGRAMS ISABEL K. DARCY The unknotting number of a knot is the minimal number of crossing changes needed to convert the knot into the unknot where the minimum is taken crossing changes in order to change it to the unknot. Thus, by looking only at the minimal diagram of 108

  17. Symmetry detection and dynamic variable ordering of decision diagrams

    Microsoft Academic Search

    Shipra Panda; Fabio Somenzi; Bernard F. Plessier

    1994-01-01

    Knowing that some variables are symmetric in a function has numerous applications; in particular, it can help produce better variable orders for Binary Decision Diagrams (BDDs) and related data structures (e.g., Algebraic Decision Diagrams). It has been conjectured that there always exists an optimum order for a BBD wherein symmetric variables are contiguous. We propose a new algorithm for the

  18. Diversions: Spatial Thinking Tasks--Cube Diagrams and Drawings

    ERIC Educational Resources Information Center

    Gough, John

    2009-01-01

    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,…

  19. RAMANUJAN MASTER THEOREM APPLIED TO THE EVALUATION OF FEYNMAN DIAGRAMS

    E-print Network

    Moll, Victor H.

    is referred to [9] for a description of these and other methods for the evaluation of Feynman diagrams method for the evaluation of some Feynman diagrams. It is based on the classical Ramanujan Master Theorem f(x) dx may be evaluated by one of Ramanujan's favorite tools; the so-called Ramanujan Master

  20. The duality diagram in data analysis: Examples of modern applications

    Microsoft Academic Search

    Omar De la Cruz; Susan Holmes

    2011-01-01

    Today’s data-heavy research environment requires the integration of different sources of information into structured data sets that can not be analyzed as simple matrices. We introduce an old technique, known in the European data analyses circles as the Duality Diagram Approach, put to new uses through the use of a variety of metrics and ways of combining different diagrams together.

  1. Phase Diagram and Scattering Intensity of Binary Amphiphilic Systems

    E-print Network

    Schwarz, Ulrich

    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

  2. Argument Diagramming and Critical Thinking in Introductory Philosophy

    ERIC Educational Resources Information Center

    Harrell, Maralee

    2011-01-01

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

  3. An Introductory Idea for Teaching Two-Component Phase Diagrams

    ERIC Educational Resources Information Center

    Peckham, Gavin D.; McNaught, Ian J.

    2011-01-01

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

  4. Automatic layout of UML class diagrams in orthogonal style

    Microsoft Academic Search

    Markus Eiglsperger; Carsten Gutwenger; Michael Kaufmann; Joachim Kupke; Michael Jünger; Sebastian Leipert; Karsten Klein; Petra Mutzel; Martin Siebenhaller

    2004-01-01

    Unified modelling language (UML) diagrams have become increasingly important in engineering and re-engineering processes for software systems. Of particular interest are UML class diagrams whose purpose is to display generalizations, associations, aggregations, and compositions in one picture. The combination of directed and undirected relations poses a special challenge to a graph layout tool. Current approaches for the automatic layout of

  5. Technical Note - A Proposal to Simplify Data Flow Diagrams

    Microsoft Academic Search

    Ido Millet

    1999-01-01

    This technical note presents an adaptation of the data flow diagram (DFD) technique whereby each data store symbol represents a database rather than a single table. It is conjectured that this modification makes DFDs easier to create, understand, and maintain. It also reduces an overlap with the entity-relationship diagram technique by curtailing graphical manifestations of the data model in the

  6. Data flow diagrams: reverse engineering production and animation

    Microsoft Academic Search

    G. Canfora; L. Sansone; G. Visaggio

    1992-01-01

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

  7. Automated Analysis of Doppler Ultrasound Velocity Flow Diagrams

    Microsoft Academic Search

    Juerg Tschirren; Ronald M. Lauer; Milan Sonka

    2001-01-01

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

  8. Fundamental Diagram Modelling and Analysis Based NGSIM Data

    E-print Network

    Horowitz, Roberto

    Fundamental Diagram Modelling and Analysis Based NGSIM Data X. Y. Lu*, P. Varaiya**, and R-wise flow-density (or equivalently speed-density) relationship which is traditionally called Fundamental Diagram (FD) over a stretch of homogeneous freeway section using the microscopic NGSIM data. Particularly

  9. Formal semantics for SA style data flow diagram specification languages

    Microsoft Academic Search

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

    1999-01-01

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

  10. HMI ring diagram analysis I. The processing pipeline

    Microsoft Academic Search

    R. S. Bogart; C. Baldner; S. Basu; D. A. Haber; M. C. Rabello-Soares

    2011-01-01

    The combination of high resolution, spatial coverage, and continuity of photospheric Doppler and other data from HMI has allowed us to embark on a program of systematic exploration of solar subsurface flows and thermal structure variations using the technique of ring-diagram analysis on an unprecedented scale. Two ring-diagrams pipelines exist: a synoptic program aimed at mapping the evolution of the

  11. Architecture flow diagrams under teamwork{reg_sign}

    Microsoft Academic Search

    Nicinski

    1992-01-01

    The Teamwork CASE tool allows Data Flow Diagrams (DFDs) to be maintained for structured analysis. Fermilab has extended teamwork under UNIX{trademark} to permit Hatley and Pirbhai Architecture Flow Diagrams (AFDs) to be associated with DFDs and subsequently maintained. This extension, called TWKAFD, allows a user to open an AFD, graphically edit it, and replace it into a TWKAFD maintained library.

  12. 49 CFR Appendix B to Part 230 - Diagrams and Drawings

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 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...

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

    ERIC Educational Resources Information Center

    Glasser, L.

    2004-01-01

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

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

    Microsoft Academic Search

    L. Glasser

    2004-01-01

    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.

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

    ERIC Educational Resources Information Center

    Goodwin, Alan

    2002-01-01

    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)

  16. The dual Voronoi diagrams with respect to representational Bregman divergences

    E-print Network

    Nielsen, Frank

    , Frank Nielsen -- p. 2/32 #12;Voronoi diagram in abstract geometries Birth of non-Euclidean geometries half-space, Conformal Poincaré disk, Non-conformal Klein disk, Pseudo-sphere in Euclidean geometry, etc | D(X, Pi) D(X, Pj) j {1, ..., n}}. Ordinary Voronoi diagram in Euclidean geometry defined for D

  17. [Epidemiologic analysis of occupational accidents using data of the Swiss National Accident Insurance].

    PubMed

    Gressot, M; Rey, P

    1982-09-01

    The present study is aimed to relate occupational accidents, as recorded by SAIF for 1974, to several risk factors among which the size of industrial enterprises. The results seem to demonstrate that very small enterprises (of less than ten employees) produce the highest rate of occupational accidents and accumulate risk factors. Nevertheless, before going very much further in the comment of results, the authors emphasize the limitations of the available statistical material. Further limitation in planning an ergonomical prevention programme on the basis of those records is to be related to the parameters chosen to explain the genesis of occupational accidents. PMID:7136290

  18. Finite calculation of divergent self-energy diagrams

    NASA Astrophysics Data System (ADS)

    Aste, A.; Trautmann, D.

    2003-12-01

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

  19. Calculation of Gallium-metal-Arsenic phase diagrams

    NASA Technical Reports Server (NTRS)

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

    1991-01-01

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

  20. Particle-hole ring diagrams for fermions in two dimensions

    E-print Network

    N. Kaiser

    2014-08-28

    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 $\\bar E(k_f)$ are calculated in 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 $\\alpha$ 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 $S_n(g)$ associated to the $n$-th order ring diagrams is derived for arbitrary spin-degeneracy $g$.