Sample records for accident diagrams

  1. Use of an influence diagram and fuzzy probability for evaluating accident management in a boiling water reactor

    SciTech Connect

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

    1994-06-01

    A new approach is presented for evaluating the uncertainties inherent in severe accident management strategies. At first, this analysis considers accident management as a decision problem (i.e., applying a strategy compared with do nothing) and uses an influence diagram. To evaluate imprecise node probabilities in the influence diagram, the analysis introduces the concept of a fuzzy probability. When fuzzy logic is applied, fuzzy probabilities are easily propagated to obtain results. In addition, the results obtained provide not only information similar to the classical approach, which uses point-estimate values, but also additional information regarding the impact of using imprecise input data. As an illustrative example, the proposed methodology is applied to the evaluation of the drywell flooding strategy for a long-term station blackout sequence at the Peach Bottom nuclear power plant. The results show that the drywell flooding strategy is beneficial for preventing reactor vessel breach. It is also effective for reducing the probability of containment failure for both liner melt-through and late overpressurization. Even though uncertainty exists in the results, flooding is preferred to do nothing when evaluated in terms of two risk measures: early and late fatalities.

  2. 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.

  3. Carroll Diagrams

    NSDL National Science Digital Library

    NRICH team

    2012-01-01

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

  4. Cloud Diagram

    NSDL National Science Digital Library

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

  5. 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.

  6. 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.

  7. Bicycle accidents.

    PubMed

    Lind, M G; Wollin, S

    1986-01-01

    Information concerning 520 bicycle accidents and their victims was obtained from medical records and the victims' replies to questionnaires. The analyzed aspects included risk of injury, completeness of accident registrations by police and in hospitals, types of injuries and influence of the cyclists' age and sex, alcohol, fatigue, hunger, haste, physical disability, purpose of cycling, wearing of protective helmet and other clothing, type and quality of road surface, site of accident (road junctions, separate cycle paths, etc.) and turning manoeuvres. PMID:3461642

  8. 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.

  9. Nuclear accidents

    Microsoft Academic Search

    Mobley

    1982-01-01

    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.

  10. Phase Diagram

    NASA Astrophysics Data System (ADS)

    Walker, Matthew S.; Fruehan, Richard J.

    2014-08-01

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

  11. Venn Diagrams

    NSDL National Science Digital Library

    Jiminez, Alfredo

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

  12. 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.

  13. From Activity Diagrams to Class Diagrams

    Microsoft Academic Search

    Joao Paulo Barros; Luis Gomes

    2000-01-01

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

  14. Nuclear accident

    Microsoft Academic Search

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

    1979-01-01

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

  15. [Snowboarding accidents].

    PubMed

    Müller, R; Brügger, O; Mathys, R; Stüssi, E

    2000-12-01

    The present review summarises the related literature of the last ten years with request to snowboarding accidents. Sport accident statistics of snowboarding show high and increasing numbers of injuries. Already snowboarding ranks third of all sport accidents in Switzerland. According to the literature the injury risk in snowboarding is twice that of skiing, although the injuries are less serious. About 50% of the injured snowboarders are beginners. Beginners have a higher risk of injury than more advanced snowboarders. Additionally, and a relative large part of them are injured the first day of their snowboard career. The pattern of injury has changed over the last years. Today, injuries to the lower extremities account no longer for more than 50% but are now decreased to about 25%. Nowadays, wrist, knee, ankle, and shoulder are the most frequently injured body parts. It is the authors opinion that with up-to-date protectors, release bindings, and training of falling techniques the numbers and seriousness of injuries could be reduced, in particular injuries to the wrist and ankle. PMID:11199401

  16. Radiation accidents.

    PubMed

    Saenger, E L

    1986-09-01

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

  17. Radiation accidents

    SciTech Connect

    Saenger, E.L.

    1986-09-01

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

  18. The Line Sequence Diagram

    Microsoft Academic Search

    Calvin R. Srock

    1966-01-01

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

  19. 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.

  20. Reducing commercial vehicle accidents through accident databases

    Microsoft Academic Search

    Will Murray; Tony Whiteing

    1995-01-01

    Commercial vehicle accidents impose very significant costs on industry and society but for a variety of reasons the full costs are often poorly understood. Advocates that vehicle operators should undertake a full and systematic analysis of accident levels, causes and costs. Introduces the CCSM model of vehicle accident reduction. By undertaking analysis based on this approach, most vehicle operators should

  1. Accident information needs

    SciTech Connect

    Hanson, D.J.; Arcieri, W.C.; Ward, L.W.

    1992-12-31

    A Five-step methodology has been developed to evaluate information needs for nuclear power plants under accident conditions and the availability of plant instrumentation during severe accidents. Step 1 examines the credible accidents and their relationships to plant safety functions. Step 2 determines the information personnel involved in accident management will need to understand plant behavior. Step 3 determines the capability of the instrumentation to function properly under severe accident conditions. Step 4 determines the conditions expected during the identified severe accidents. Step 5 compares the instrument capabilities and the severe accident conditions to evaluate the availability of the instrumentation to supply needed plant information.

  2. Accident information needs

    SciTech Connect

    Hanson, D.J.; Arcieri, W.C.; Ward, L.W.

    1992-01-01

    A Five-step methodology has been developed to evaluate information needs for nuclear power plants under accident conditions and the availability of plant instrumentation during severe accidents. Step 1 examines the credible accidents and their relationships to plant safety functions. Step 2 determines the information personnel involved in accident management will need to understand plant behavior. Step 3 determines the capability of the instrumentation to function properly under severe accident conditions. Step 4 determines the conditions expected during the identified severe accidents. Step 5 compares the instrument capabilities and the severe accident conditions to evaluate the availability of the instrumentation to supply needed plant information.

  3. 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.

  4. 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.

  5. Algorithmic phase diagrams

    NASA Technical Reports Server (NTRS)

    Hockney, Roger

    1987-01-01

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

  6. Designing an Experimental "Accident"

    ERIC Educational Resources Information Center

    Picker, Lester

    1974-01-01

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

  7. Interpreting Accident Statistics

    E-print Network

    Ferreira, Joseph Jr.

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

  8. 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.

  9. 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.

  10. The Chernobyl Accident: About the Accident

    Cancer.gov

    On April 26, 1986 an accident occurred at the Chernobyl nuclear power plant in Ukraine. The accident happened during a routine test, intended to demonstrate how long the turbines would spin after a power loss. Prior to the test, the automatic shutdown mechanisms were disabled. Coolant water was reduced and the power output was increased. The operator tried to shut down the reactor but a flaw in the design caused a large power surge.

  11. 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.

  12. Accident mortality among children

    PubMed Central

    Swaroop, S.; Albrecht, R. M.; Grab, B.

    1956-01-01

    The authors present statistics on mortality from accidents, with special reference to those relating to the age-group 1-19 years. For a number of countries figures are given for the proportional mortality from accidents (the number of accident deaths expressed as a percentage of the number of deaths from all causes) and for the specific death-rates, per 100 000 population, from all causes of death, from selected causes, from all causes of accidents, and from various types of accident. From these figures it appears that, in most countries, accidents are becoming relatively increasingly prominent as a cause of death in childhood, primarily because of the conquest of other causes of death—such as infectious and parasitic diseases, which formerly took a heavy toll of children and adolescents—but also to some extent because the death-rate from motor-vehicle accidents is rising and cancelling out the reduction in the rate for other causes of accidental death. In the authors' opinion, further epidemiological investigations into accident causation are required for the purpose of devising quicker and more effective methods of accident prevention. PMID:13383361

  13. [Accidents with the "paraglider"].

    PubMed

    Lang, T H; Dengg, C; Gabl, M

    1988-09-01

    With a collective of 46 patients we show the details and kinds of accidents caused by paragliding. The base for the casuistry of the accidents was a questionnaire which was answered by most of the injured persons. These were questions about the theoretical and practical training, the course of the flight during the different phases, and the subjective point of view of the course of the accident. The patterns of the injuries showed a high incidence of injuries of the spinal column and high risks for the ankles. At the end, we give some advice how to prevent these accidents. PMID:3242158

  14. 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.

  15. Anatomy of an Accident.

    ERIC Educational Resources Information Center

    Mobley, Michael

    1984-01-01

    The findings of industrial safety engineers in the areas of accident causation and prevention are wholly applicable to adventure programs. Adventure education instructors can use safety engineering concepts to assess the risk in a particular activity, understand factors that cause accidents, and intervene to minimize injuries and damages if…

  16. 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

  17. Voronoi Diagrams Delaunay Triangulations

    E-print Network

    Kazhdan, Michael

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

  18. Alloy phase diagrams

    Microsoft Academic Search

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

    1984-01-01

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

  19. Venn Diagrams and Logic

    NSDL National Science Digital Library

    2011-01-04

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

  20. Accidents on hospital wards.

    PubMed Central

    Levene, S; Bonfield, G

    1991-01-01

    Eight hospitals reported 781 non-iatrogenic accidents occurring to patients and visitors under 16 years of age during an 18 month period up to October 1989. Accidents more often involved boys and children aged 3 to 5 years old. Falls from a height, slips, and striking accidents were common by day and falls by night. A total of 41% of accidents to inpatients occurred when parents were present. Only three accidents were serious. Altogether 27% involved beds and cots, and only one consequent injury was more than minor. Data collected routinely in case of medicolegal action can be presented in a form that may facilitate preventative work. Potentially remediable causes for concern include falls from beds and cots and the use of makeshift equipment. PMID:1929510

  1. UNIVERSITY OF TRENTO ACCIDENT INSURANCE

    E-print Network

    1 UNIVERSITY OF TRENTO ACCIDENT INSURANCE POLICY This document reflects the contractual conditions; · accidents resulting from popular uproars, acts of terrorism, malicious damages, act of violence, kidnaps

  2. 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.

  3. 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

  4. A Feynman Diagram Analyser DIANA

    E-print Network

    M. Tentyukov; J. Fleischer

    1999-04-07

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

  5. 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

  6. Energy Diagram Explorer

    NSDL National Science Digital Library

    Zollman, Dean

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

  7. 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....

  8. The Chernobyl Accident: Oversight

    Cancer.gov

    Skip to Main Content at the National Institutes of Health | www.cancer.gov What's Inside Home About the Accident Studies Ukrainian Thyroid Study Belarusian Thyroid Study Leukemia Study Dosimetry Selected Publications Research Staff Collaborators Oversight Research

  9. 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.

  10. Hang-gliding accidents

    Microsoft Academic Search

    R Margreiter; L J Lugger

    1978-01-01

    Seventy-five known hang-gliding accidents causing injury to the pilot occurred in the Tyrol during 1973-6. Most occurred in May, June, or September and between 11 am and 3 pm, when unfavourable thermic conditions are most likely. Thirty-four accidents happened during launching, 13 during flight, and 28 during landing, and most were caused by human errors--especially deficient launching technique; incorrect estimation

  11. 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.

  12. Warped penguin diagrams

    NASA Astrophysics Data System (ADS)

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

    2011-04-01

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

  13. Diagram spaces and symmetric spectra

    Microsoft Academic Search

    Steffen Sagave; Christian Schlichtkrull

    2011-01-01

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

  14. Farthest line segment Voronoi diagrams

    Microsoft Academic Search

    Franz Aurenhammer; Robert L. Scot Drysdale; Hannes Krasser

    2006-01-01

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

  15. Metastable phases and phase diagrams

    Microsoft Academic Search

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

    2004-01-01

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

  16. 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.

  17. 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

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

    NASA Astrophysics Data System (ADS)

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

    2014-09-01

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

  19. [Travel and accidents].

    PubMed

    Cha, Olivier

    2015-04-01

    Traumatic pathologies are the most frequent medical events to be observed among French travellers. Accidents on the public highway by lack of respect of the fundamental rules of road security, particularly abroad, traffic conditions in bad repair in numerous emergent countries, usually the destination of mass tourism and underdeveloped organization of health care and local urgency help. Sports activities are also a source of accidents. A good physical training is essential. Drowning is a real plague, especially among children due to a lack of vigilance. Preventive measures are simple, keep them constantly in mind and apply them carefully so as to have beautiful memories of our trip back home. PMID:26058199

  20. Occupational accidents aboard merchant ships

    PubMed Central

    Hansen, H; Nielsen, D; Frydenberg, M

    2002-01-01

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

  1. Accident reconstruction methods

    Microsoft Academic Search

    Hermann Steffan

    2009-01-01

    While reconstructing a car accident, there are several questions that must be answered, such as the movement of all the vehicles involved or of other people involved, or of objects from the point of first visual contact to their rest positions. Time history of velocities, positions as well as crash-related data such as velocity changes, deformation energies, or passenger loads

  2. The Chernobyl Accident: Studies

    Cancer.gov

    The Chernobyl nuclear power plant accident in the former Soviet Union in 1986 exposed large numbers of people in Ukraine, Belarus and Russia to radioactive iodines, principally I-131 which concentrates in the thyroid gland (Hatch, et al. 2005; Cardis and Hatch, 2011).

  3. Physics in Auto Accidents

    Microsoft Academic Search

    George Barnes

    1960-01-01

    This article concerns a particular application of the fundamentals of physics with which most physicists have little contact. Some elementary physics commonly used by our law enforcement officers in the reconstruction of automobile accidents is reviewed. In particular, formulas for the determination of (a) vehicle speed through skid marks, (b) minimum speed for a vehicle skidding off-course while turning a

  4. Physics in Accident Investigations.

    ERIC Educational Resources Information Center

    Brake, Mary L.

    1981-01-01

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

  5. Managing nuclear accidents

    Microsoft Academic Search

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

    1992-01-01

    An accident at a nuclear power plant can pose a serious threat to surrounding populations. If people and their government are poorly prepared, as was the case at Windscale, England in 1957, Three Mile Island (TMI) in the United States in 1979, and Chernobyl in the Soviet Union in 1986, substantial exposure to radiation could occur. Much has been done

  6. Potential-pH Diagrams.

    ERIC Educational Resources Information Center

    Barnum, Dennis W.

    1982-01-01

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

  7. 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.

  8. Time Temperature Transformation (TTT) Diagrams

    E-print Network

    Cambridge, University of

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

  9. EPR accident scenarios and provisions

    Microsoft Academic Search

    Dietmar Bittermann; Ulrich Krugmann; Garo Azarian

    2001-01-01

    For the EPR an improved defence-in-depth concept is applied. In an evolutionary way, accident control is developed from existing French and German PWR designs, thereby achieving a high safety level quantified by probabilistic safety assessment. Independent of that, severe accidents are considered in the design. By a robust containment and severe accident mitigation measures, the need for offsite emergency response

  10. 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.

  11. Integrating UML diagrams for production control systems

    Microsoft Academic Search

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

    2000-01-01

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

  12. [Heliogeophysical factors and aviation accidents].

    PubMed

    Komarov, F I; Oraevski?, V N; Sizov, Iu P; Tsirul'nik, L B; Kanonidi, Kh D; Ushakov, I B; Shalimov, P M; Kimlyk, M V; Glukhov, D V

    1998-01-01

    It was shown by two independent methods that there is a certain correlation between the number of aviation accidents and heliogeophysical factors. The statistical and spectral analyses of time series of heliogeomagnetic factors and the number of aviation accidents in 1989-1995 showed that, of 216 accidents, 58% are related to sudden geomagnetic storms. A similar relation was revealed for aviation catastrophes (64% out of 86 accidents) and emergencies (54% out of 130 accidents) that coincided in time with heliogeomagnetic storms. General periodicities of the series were revealed by the method of spectral analysis, namely, cycles of 30, 42, 46, 64, 74, 83, 99, 115, 143, 169, 339 days, which confirms the causative relation between the number of aviation accidents and heliogeomagnetic factors. It is assumed that some aviation accidents that coincided in time with geomagnetic storms, are due to changes in professional abilities of pilots that were in the zone of storms. PMID:9783079

  13. Particles, Feynman Diagrams and All That

    ERIC Educational Resources Information Center

    Daniel, Michael

    2006-01-01

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

  14. Phase diagram of polypeptide chains

    NASA Astrophysics Data System (ADS)

    Auer, Stefan

    2011-11-01

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

  15. The Chernobyl Accident: Collaborators

    Cancer.gov

    A special note is made of the extraordinary leadership of the late Dr. Elaine Ron, who helped shape and oversee the conduct of the NCI-Chernobyl program. The late Dr. Geoffrey Howe of Columbia University also made invaluable contributions to this research. We also wish to acknowledge Drs. Gilbert Beebe, Jacob Robbins, and Terry Thomas, who were involved from the earliest days following the accident and continued to provide scientific input until the time of their respective deaths.

  16. Computer calculation of distribution diagrams.

    PubMed

    Maggiore, R; Musumeci, S; Sammartano, S

    1976-01-01

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

  17. Nitrogen–Oxygen Phase Diagram

    Microsoft Academic Search

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

    1968-01-01

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

  18. Z diagrams of composite objects

    Microsoft Academic Search

    T. Jaroszewicz; Stanley J. Brodsky

    1991-01-01

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

  19. Diagram Designer 1.23

    NSDL National Science Digital Library

    Vinther, Michael

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

  20. Nuclear accident dosimetry intercomparison studies

    Microsoft Academic Search

    C. S. Sims

    1989-01-01

    Twenty-two nuclear accident dosimetry intercomparison studies utilizing the fast-pulse Health Physics Research Reactor at the Oak Ridge National Laboratory have been conducted since 1965. These studies have provided a total of 62 different organizations a forum for discussion of criticality accident dosimetry, an opportunity to test their neutron and gamma-ray dosimetry systems under a variety of simulated criticality accident conditions,

  1. Credible investigation of air accidents.

    PubMed

    Smart, K

    2004-07-26

    Within the United Kingdom the Air Accidents Investigation Branch (AAIB) has been used as a model for the other transport modes accident investigation bodies. Government Ministers considered that the AAIB's approach had established the trust of the public and the aviation industry in its ability to conduct independent and objective investigations. The paper will examine the factors that are involved in establishing this trust. They include: the investigation framework; the actual and perceived independence of the accident investigating body; the aviation industry's safety culture; the qualities of the investigators and the quality of their liaison with bereaved families those directly affected by the accidents they investigate. PMID:15231355

  2. Trends in gender differences in accidents mortality

    Microsoft Academic Search

    Ingrid Waldron; Christopher McCloskey; Inga Earle

    2005-01-01

    This study tests five hypotheses concerning trends in gender differences in accidents mortality and accident-related behavior, using data for the US, UK, France, Italy, and Japan, 1950-98. As predicted by the Convergence Hypothesis, gender differences have decreased for amount of driving, motor vehicle accidents mortality, and occupational accidents mortality. However, for many types of accidents mortality, gender differences were stable

  3. Two-dimensional line space Voronoi Diagram

    Microsoft Academic Search

    Stéphane Rivière; Dominique Schmitt

    2007-01-01

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

  4. DRAWING DIAGRAMS IN AN ONLINE EXAMINATION

    Microsoft Academic Search

    Pete Thomas

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

  5. Automatically Assessing Graph-Based Diagrams

    ERIC Educational Resources Information Center

    Thomas, Pete; Smith, Neil; Waugh, Kevin

    2008-01-01

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

  6. Accident characterization methodology

    SciTech Connect

    Camp, A.L.; Harper, F.T.

    1986-01-01

    The Nuclear Regulatory Commission (NRC) is preparing NUREG-1150 to examine the risk from a selected group of nuclear power plants. NUREG-1150 will provide technical bases for comparison of NRC research to industry results and resolution of numerous severe accident issues. In support of NUREG-1150, Sandia National Laboratories has directed the production of Level 3 Probabilistic Risk Assessments (PRAs) for the Surry, Sequoyah, Peach Bottom, and Grand Gulf nuclear power plants. The Accident Sequence Evaluation Program (ASEP) at Sandia has been responsible for the Level 1 portion of the analyses, which includes estimation of core damage frequency and characterization of the dominant sequences. The ASEP analyses are being documented in NUREG/CR-4550. The purpose of this paper is to briefly describe and evaluate the methodology utilized in these analyses. The methodology will soon be published in more detail as Reference 5. The results produced for NUREG/CR-4550 using this methodology are summarized in another paper to be presented at this conference.

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

    Microsoft Academic Search

    Dorothea Blostein; Lippold Haken

    1999-01-01

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

  8. 28 CFR 301.106 - Repetitious accidents.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 false Repetitious accidents. 301.106 Section 301.106 Judicial Administration FEDERAL PRISON INDUSTRIES, INC., DEPARTMENT OF JUSTICE INMATE ACCIDENT COMPENSATION General § 301.106 Repetitious accidents. If an inmate...

  9. 28 CFR 301.106 - Repetitious accidents.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 false Repetitious accidents. 301.106 Section 301.106 Judicial Administration FEDERAL PRISON INDUSTRIES, INC., DEPARTMENT OF JUSTICE INMATE ACCIDENT COMPENSATION General § 301.106 Repetitious accidents. If an inmate...

  10. Industry program needed for nuclear accident management

    Microsoft Academic Search

    Klopp

    1989-01-01

    This paper addresses the need for a management program for nuclear power accidents. According to the author, the tools and technology for severe accident management exist. The need for a clear, realistic definition of nuclear accident program requirements is discussed.

  11. Pseudohaptic interaction with knot diagrams

    NASA Astrophysics Data System (ADS)

    Weng, Jianguang; Zhang, Hui

    2012-07-01

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

  12. 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.

  13. 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.

  14. The Quasar SED Mixing Diagram

    NASA Astrophysics Data System (ADS)

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

    2011-05-01

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

  15. 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

  16. Columbia Accident Investigation Board

    NASA Technical Reports Server (NTRS)

    2003-01-01

    The Columbia Accident Investigation Board gathers for a second day for its third public hearing, held in Cape Canaveral, Florida. The CAIB was set up to examine STS-107 and analyze exploratory tests. Navy Admiral Harold W. 'Hal' Gehman Jr. was designated as the Chairman of the Board. From left to right in this photo sit Board Members Steven B. Wallace, Scott Hubbard, Dr. John Logsdon, Rear Admiral Stephen Turcotte, Hal Gehman, General Duane Deal, Dr. Douglas Osheroff, and Maj. General Kenneth W. Hess. Not shown are Maj. General John Barry, Dr. James N. Hallock, Roger Tetrault, Dr. Sheila Widnall, and Dr. Sally Ride. For more information on STS-107, please see GRIN Columbia General Explanation

  17. Transport aircraft accident dynamics

    NASA Technical Reports Server (NTRS)

    Cominsky, A.

    1982-01-01

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

  18. Cellular automata model simulating traffic car accidents in the on-ramp system

    NASA Astrophysics Data System (ADS)

    Echab, H.; Lakouari, N.; Ez-Zahraouy, H.; Benyoussef, A.

    2015-01-01

    In this paper, using Nagel-Schreckenberg model we study the on-ramp system under the expanded open boundary condition. The phase diagram of the two-lane on-ramp system is computed. It is found that the expanded left boundary insertion strategy enhances the flow in the on-ramp lane. Furthermore, we have studied the probability of the occurrence of car accidents. We distinguish two types of car accidents: the accident at the on-ramp site (Prc) and the rear-end accident in the main road (Pac). It is shown that car accidents at the on-ramp site are more likely to occur when traffic is free on road A. However, the rear-end accidents begin to occur above a critical injecting rate ?c1. The influence of the on-ramp length (LB) and position (xC0) on the car accidents probabilities is studied. We found that large LB or xC0 causes an important decrease of the probability Prc. However, only large xC0 provokes an increase of the probability Pac. The effect of the stochastic randomization is also computed.

  19. INCONEL 718: A solidification diagram

    Microsoft Academic Search

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

    1989-01-01

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

  20. Venn Diagram Warm-Up

    NSDL National Science Digital Library

    M Johnson

    2013-10-02

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

  1. 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

  2. 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

  3. 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…

  4. 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.

  5. 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

  6. 49 CFR 382.303 - Post-accident testing.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

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

  7. Decapitation due to car accident.

    PubMed

    Ausania, Francesco; Cittadini, Francesca; Cascini, Fidelia; Polacco, Matteo; Pascali, Vincenzo L; Oliva, Antonio

    2011-12-01

    The occurrence of complete decapitation as a consequence of car accident is an extremely rare event. This fatality is generally seen in pedestrians run over by trains and also in motorcyclists who impact against the tailboard of trucks. Moreover, complete transection of pedestrians and occupants of cars has been described in road accidents especially in case of vehicles traveling at a high speed. We present a case of decapitation with complete degloving injury of the neck in a patient involved in a traffic accident, and we briefly discuss the possible mechanisms producing this injury. PMID:21897196

  8. Co-relation of Variables Involved in the Occurrence of Crane Accidents in U.S. through Logit Modeling. 

    E-print Network

    Bains, Amrit Anoop Singh

    2010-10-12

    Bridge Crane (Source-NOAA) ........................................... 15 Figure 6 Illustration Shows Jib Crane (Source- NOAA) ................................................ 15 Figure 7 Illustration Shows Tower Crane (Source- NOAA... The Baldwin Model .......................................................................................... 23 Figure 11Frequency of Crane Accidents from 2000 to 2006 ........................................... 34 Figure 12 Venn Diagram for Derived...

  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. MULTI-TERMINAL BINARY DECISION DIAGRAMS AND

    E-print Network

    Clarke, Edmund M.

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

  11. Rough set approach for accident chains exploration

    Microsoft Academic Search

    Jinn-Tsai Wong; Yi-Shih Chung

    2007-01-01

    This paper presents a novel non-parametric methodology – rough set theory – for accident occurrence exploration. The rough set theory allows researchers to analyze accidents in multiple dimensions and to model accident occurrence as factor chains. Factor chains are composed of driver characteristics, trip characteristics, driver behavior and environment factors that imply typical accident occurrence. A real-world database (2003 Taiwan

  12. 49 CFR 229.17 - Accident reports.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Accident reports. 229.17 Section 229.17...General § 229.17 Accident reports. (a) In the case of an accident due to a...the locomotive shall immediately report the accident by toll free...

  13. Nuclear fuel cycle facility accident analysis handbook

    Microsoft Academic Search

    J. E. Ayer; A. T. Clark; P. Loysen; M. Y. Ballinger; J. Mishima; P. C. Owczarski; W. S. Gregory; B. D. Nichols

    1988-01-01

    The Accident Analysis Handbook (AAH) covers four generic facilities: fuel manufacturing, fuel reprocessing, waste storage\\/solidification, and spent fuel storage; and six accident types: fire, explosion, tornado, criticality, spill, and equipment failure. These are the accident types considered to make major contributions to the radiological risk from accidents in nuclear fuel cycle facility operations. The AAH will enable the user to

  14. Pressure-enthalpy diagrams for alternative refrigerants

    Microsoft Academic Search

    J. Chen; H. Kruse

    1996-01-01

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

  15. guidelines for binary phase diagram assessment

    Microsoft Academic Search

    H. Okamoto; T. B. Massalski

    1993-01-01

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

  16. The Chernobyl Accident: Contact Us

    Cancer.gov

    Skip to Main Content at the National Institutes of Health | www.cancer.gov What's Inside Home About the Accident Studies Ukrainian Thyroid Study Belarusian Thyroid Study Leukemia Study Dosimetry Selected Publications Research Staff Collaborators Oversight Research

  17. The Chernobyl Accident: Research Staff

    Cancer.gov

    Skip to Main Content at the National Institutes of Health | www.cancer.gov What's Inside Home About the Accident Studies Ukrainian Thyroid Study Belarusian Thyroid Study Leukemia Study Dosimetry Selected Publications Research Staff Collaborators Oversight Research

  18. Cerebrovascular accident clinical pathway.

    PubMed

    Wilkinson, G; Parcell, M; MacDonald, A

    2000-01-01

    The cerebrovascular accident (CVA) clinical pathway project was selected to complement the work already underway within the West Moreton Health Services District such as the development of a continuum of care model, revision of work practices to complement the new hospital redevelopment and encouraging team and evidence-based approaches to problem solving. Specific objectives were set for the project along with a detailed evaluation plan. A steering group was convened to run the project and a full time project officer was appointed. At the end of the 12 month period all the objectives were met. Specific achievements included a reduction in the overall average length of stay for those patients who experience CVA, improved clinical outcomes and a more effective use of resources. Quality of care has been improved through the preparation of specialized clinical pathway documentation, education packages, patient surveys, focus groups, independent reviews and benchmarking. Complementing these measures has been a series of process changes and environmental modifications. Furthermore, good working relationships have been established with private sector providers of health care and other external bodies. The development of the CVA clinical pathway at the Ipswich Hospital has meant timely referrals and a streamlined assessment and referral process to get patients into rehabilitation sooner. It has promoted good communication between, and recognition of, the professional roles of various team members and has put the patient back at the centre of the care process. PMID:11057994

  19. 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.

  20. The Butterfly Diagram Internal Structure

    NASA Astrophysics Data System (ADS)

    Ternullo, Maurizio

    2013-06-01

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

  1. Arrows in Comprehending and Producing Mechanical Diagrams

    ERIC Educational Resources Information Center

    Heiser, Julie; Tversky, Barbara

    2006-01-01

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

  2. DRAWING ENVIRONMENT DIAGRAMS COMPUTER SCIENCE 61A

    E-print Network

    California at Berkeley, University of

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

  3. Treatment of Diagrams in Document Image Analysis

    Microsoft Academic Search

    Dorothea Blostein; Edward Lank; Richard Zanibbi

    2000-01-01

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

  4. Generating Textual Diagrams and Diagrammatic Texts

    Microsoft Academic Search

    Donia Scott; Richard Power

    1998-01-01

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

  5. Causal Reasoning with Neuron Diagrams Martin Erwig

    E-print Network

    Erwig, Martin

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

  6. Constant life diagrams — a historical review

    Microsoft Academic Search

    G. P. Sendeckyj

    2001-01-01

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

  7. Interactive Exploration of UML Sequence Diagrams

    Microsoft Academic Search

    Richard Sharp; Atanas Rountev

    2005-01-01

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

  8. Integrating Model Information in UML Sequence Diagrams

    Microsoft Academic Search

    Aliki Tsiolakis

    2001-01-01

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

  9. Monitoring with Behavior View Diagrams for Debugging

    Microsoft Academic Search

    Donglin Liang; Kai Xu

    2005-01-01

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

  10. Designing UML diagrams for technical documentation

    Microsoft Academic Search

    Neil MacKinnon; Steve Murphy

    2003-01-01

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

  11. A Layout Algorithm for Data Flow Diagrams

    Microsoft Academic Search

    Carlo Batini; Enrico Nardelli; Roberto Tamassia

    1986-01-01

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

  12. 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.

  13. Paragliding accidents in remote areas.

    PubMed

    Fasching, G; Schippinger, G; Pretscher, R

    1997-08-01

    Paragliding is an increasingly popular hobby, as people try to find new and more adventurous activities. However, there is an increased and inherent danger with this sport. For this reason, as well as the inexperience of many operators, injuries occur frequently. This retrospective study centers on the helicopter rescue of 70 individuals in paragliding accidents. All histories were examined, and 43 patients answered a questionnaire. Nineteen (42%) pilots were injured when taking off, 20 (44%) during the flight, and six (13%) when landing. Routine and experience did not affect the prevalence of accident. Analysis of the causes of accident revealed pilot errors in all but three cases. In 34 rescue operations a landing of the helicopter near the site of the accident was possible. Half of the patients had to be rescued by a cable winch or a long rope fixed to the helicopter. Seven (10%) of the pilots suffered multiple trauma, 38 (54%) had injuries of the lower extremities, and 32 (84%) of them sustained fractures. Injuries to the spine were diagnosed in 34 cases with a fracture rate of 85%. One patient had an incomplete paraplegia. Injuries to the head occurred in 17 patients. No paraglider pilot died. The average hospitalization was 22 days, and average time of working inability was 14 weeks. Fourteen (34%) patients suffered from a permanent damage to their nerves or joints. Forty-three percent of the paragliders continued their sport despite the accident; two of them had another accident. An improved training program is necessary to lower the incidence of paragliding accidents. Optimal equipment to reduce injuries in case of accidents is mandatory. The helicopter emergency physician must perform a careful examination, provide stabilization of airways and circulation, give analgesics, splint fractured extremities, and transport the victim on a vacuum mattress to the appropriate hospital. PMID:11990151

  14. Phase diagram of coupled ladders

    Microsoft Academic Search

    T. F. A. Müller; T. M. Rice

    1998-01-01

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

  15. 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

  16. INCONEL 718: A solidification diagram

    Microsoft Academic Search

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

    1989-01-01

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

  17. 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…

  18. Severe accident analysis using dynamic accident progression event trees

    NASA Astrophysics Data System (ADS)

    Hakobyan, Aram P.

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

  19. [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

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

    NASA Astrophysics Data System (ADS)

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

    2009-07-01

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

  1. 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.

  2. The TMI-2 accident evaluation program

    SciTech Connect

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

    1989-01-01

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

  3. A CANDU Severe Accident Analysis

    SciTech Connect

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

    2006-07-01

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

  4. Phase diagram of coupled ladders

    Microsoft Academic Search

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

    1998-01-01

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

  5. Severe accident source term reassessment

    SciTech Connect

    Hazzan, M.J.; Gardner, R.; Warman, E.A.; Jacobs, S.B.

    1988-01-01

    This paper summarizes the status of the reassessment of severe reactor accident source terms, which are defined as the quantity, type, and timing of fission product releases from such accidents. Concentration is on the major results and conclusions of analyses with modern methods for both pressurized water reactors (PWRs) and boiling water reactors (BWRs), and the special case of containment bypass. Some distinctions are drawn between analyses for PWRs and BWRs. In general, the more the matter is examined, the consequences, or probability of serious consequences, seem to be less.

  6. 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

  7. Binary alloy phase diagrams requiring further studies

    Microsoft Academic Search

    H. Okamoto; T. B. Massalski

    1994-01-01

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

  8. The box diagram in Yukawa theory

    E-print Network

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

    2006-10-30

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

  9. Creating 3D animations to reconstruct transportation accidents: illustrating aviation accidents using Air Midwest flight 5481 takeoff accident

    Microsoft Academic Search

    Christy Spangler; Alice Park; Abdullah Kakar

    2004-01-01

    The National Transportation Safety Board (NTSB) uses 3D animation to reconstruct and illustrate accident sequences so that the public can visualize and better understand the events leading up to an accident, the determination of probable cause, and the identification of safety issues. These animations factually and faithfully present the accident sequence based on measured, recorded, and calculated data. The purpose

  10. Analysis of accidents during flashing operations 

    E-print Network

    Obermeyer, Michael Edward

    1993-01-01

    occurred at intersections under flashing operation compared to those operating in the normal mode. A statistical analysis was conducted to determine the safety of flashing signal operation. No significant increases in accidents or accident severity were...

  11. Classical 3-loop 2-body diagrams

    E-print Network

    Barak Kol; Ruth Shir

    2013-07-30

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

  12. 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.

  13. Time Slows Down during Accidents.

    PubMed

    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

  14. Emergency and Post Accident Managementi

    Microsoft Academic Search

    G N Kelly; C Rojas Palma

    Almost two decades after Chernobyl, off site nuclear emergency management does not occupy the forefront of political debate or public attention, and this has a direct implication in its longer term funding. Furthermore, the safety of nuclear installations is the subject of continuous improvements, with consequential reductions in the risk of an accident, which in turn has led some to

  15. Updating outdated predictive accident models.

    PubMed

    Wood, A G; Mountain, L J; Connors, R D; Maher, M J; Ropkins, K

    2013-06-01

    Reliable predictive accident models (PAMs) (also referred to as safety performance functions (SPFs)) are essential to design and maintain safe road networks however, ongoing changes in road and vehicle design coupled with road safety initiatives, mean that these models can quickly become dated. Unfortunately, because the fitting of sophisticated PAMs including a wide range of explanatory variables is not a trivial task, available models tend to be based on data collected many years ago and seem unlikely to give reliable estimates of current accidents. Large, expensive studies to produce new models are likely to be, at best, only a temporary solution. This paper thus seeks to develop a practical and efficient methodology to allow currently available PAMs to be updated to give unbiased estimates of accident frequencies at any point in time. Two principal issues are examined: the extent to which the temporal transferability of predictive accident models varies with model complexity; and the practicality and efficiency of two alternative updating strategies. The models used to illustrate these issues are the suites of models developed for rural dual and single carriageway roads in the UK. These are widely used in several software packages in spite of being based on data collected during the 1980s and early 1990s. It was found that increased model complexity by no means ensures better temporal transferability and that calibration of the models using a scale factor can be a practical alternative to fitting new models. PMID:23510788

  16. The Physics of Traffic Accidents

    ERIC Educational Resources Information Center

    Knight, Peter

    1975-01-01

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

  17. Accident reduction through stress management

    Microsoft Academic Search

    Lawrence R. Murphy; David DuBois; Joseph J. Hurrell

    1986-01-01

    The deleterious effects of occupational stress on worker health and well-being have been described in numerous reports for a wide range of work groups. Work overload (and underload), deadline pressures, role Stressors, underutilization of abilities, and physical discomfort have been identified as work factors associated with increased stress symptom reporting. The relationship between work stress and accident\\/injury occurrences is less

  18. Phase Diagram of Optimal Paths

    E-print Network

    Alex Hansen; Janos Kertesz

    2004-02-17

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

  19. Hubble's diagram and cosmic expansion

    PubMed Central

    Kirshner, Robert P.

    2004-01-01

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

  20. The Chernobyl Accident and its Consequences

    Microsoft Academic Search

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

    2011-01-01

    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

  1. Development of severe accident procedures for Ringhals

    Microsoft Academic Search

    R. J. Lutz; E. Frantz; S. R. Prokopovich; R. Bastien

    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

  2. Serious occupational accidents in the construction industry

    Microsoft Academic Search

    Simo Salminen

    1995-01-01

    The aim of this study is to examine three hypotheses based on the review of literature concerning occupational accidents in the construction industry. The data concern 102 victims of 99 serious occupational accidents. Of these 102 victims, 35 worked in the construction industry. The first hypothesis assuming the higher risk-taking tendency among victims of construction accidents than among victims from

  3. 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.

  4. No Silver Bullet Essence and Accidents

    E-print Network

    North Carolina at Chapel Hill, University of

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

  5. Perception of road accident causes.

    PubMed

    Vanlaar, Ward; Yannis, George

    2006-01-01

    A theoretical two-dimensional model on prevalence and risk was developed. The objective of this study was to validate this model empirically to answer three questions: How do European drivers perceive the importance of several causes of road accidents? Are there important differences in perceptions between member states? Do these perceptions reflect the real significance of road accident causes? Data were collected from 23 countries, based on representative national samples of at least 1000 respondents each (n=24,372). Face-to-face interviews with fully licensed, active car drivers were conducted using a questionnaire containing closed answer questions. Respondents were asked to rate 15 causes of road accidents, each using a six-point ordinal scale. The answers were analyzed by calculating Kendall's tau for each pair of items to form lower triangle similarity matrices per country and for Europe as a whole. These matrices were then used as the input files for an individual difference scaling to draw a perceptual map of the 15 items involved. The hypothesized model on risk and prevalence fits the data well and enabled us to answer the three questions of concern. The subject space of the model showed that there are no relevant differences between the 23 countries. The group space of the model comprises four quadrants, each containing several items (high perceived risk/low perceived prevalence items; high perceived risk/high perceived prevalence items; low perceived risk/high perceived prevalence items and low perceived risk/low perceived prevalence items). Finally, perceptions of the items driving under the influence of alcohol, drugs and medicines and driving using a handheld or hands-free mobile phone are discussed with regard to their real significance in causing road accidents. To conclude, individual difference scaling offers some promising possibilities to study drivers' perception of road accident causes. PMID:16191426

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

    NASA Astrophysics Data System (ADS)

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

    2014-02-01

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

  7. Counting planar diagrams with various restrictions

    Microsoft Academic Search

    Gerard't Hooft

    1999-01-01

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

  8. On the convergence of planar diagram expansions

    Microsoft Academic Search

    Gerard't Hooft

    1982-01-01

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

  9. User applications of alloy phase diagrams

    Microsoft Academic Search

    V. Raghavan

    2009-01-01

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

  10. Towards Flexible Graphical Communication Using Adaptive Diagrams

    Microsoft Academic Search

    Kim Marriott; Bernd Meyer; Peter J. Stuckey

    2004-01-01

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

  11. Combinatorial Gelfand Models for Diagram Algebras

    E-print Network

    Halverson, Tom

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

  12. MCS 360 L-5 use case diagram

    E-print Network

    Verschelde, Jan

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

  13. MCS 360 L5 use case diagram

    E-print Network

    Verschelde, Jan

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

  14. Phase diagram of a random tiling quasicrystal

    Microsoft Academic Search

    Weixiong Li; Michael Widom

    1992-01-01

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

  15. A Monitoring Profile for UML Sequence Diagrams

    Microsoft Academic Search

    Kai Xu; Donglin Liang

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

  16. Sematics of UML Sequence Diagrams in PVS

    Microsoft Academic Search

    Demissie B. Aredo

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

  17. Fundamental Traffic Diagrams of Elementary Road Networks

    Microsoft Academic Search

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

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

  18. Domestic accidents: their cause and prevention

    PubMed Central

    Mackessack-Leitch, K.

    1978-01-01

    The study of domestic accidents, which includes accidents in and around the home and in institutions, is of increasing importance. The mortality statistics are shown in Table 1. In 1974, 18,335 people died from accidents in the UK (RoSPA, 1974) equivalent to the population of a reasonably sized town. Accidents form one of the four main causes of death in this country and have become relatively more common in recent years. Analysis of the causes of home accidents make it possible to plan ways of preventing them. General practitioners and their colleagues in the primary health care team have the principal responsibility. PMID:553168

  19. Recognition of On-Line Handwritten Commutative Diagrams

    Microsoft Academic Search

    Andreas Stoffel; Ernesto Tapia; Ra ´ ul Rojas

    2009-01-01

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

  20. Phase diagram of coupled ladders

    NASA Astrophysics Data System (ADS)

    Müller, T. F. A.; Rice, T. M.

    1998-08-01

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

  1. A Hubble Diagram for Quasars

    E-print Network

    Risaliti, Guido

    2015-01-01

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

  2. [Multicenter paragliding accident study 1990].

    PubMed

    Lautenschlager, S; Karli, U; Matter, P

    1992-01-01

    During the period from 1.1.90 until 31.12.90, 86 injuries associated with paragliding were analyzed in a prospective study in 12 different Swiss hospitals with reference to causes, patterns, and frequencies. The injuries showed a mean score of over 2 and were classified as severe. Most frequent spine injuries (36%) and lesions of the lower extremity (35%) with a high risk of the ankles were diagnosed. One accident was fatal. 60% of the accidents happened during landing, 26% during launching and 14% during flight. Half of the pilots were affected during their primary training course. Most accidents were caused by inflight error of judgement--especially incorrect estimation of wind conditions--and further the choice of unfavourable landing sites. In contrast to previous injury-reports, only one equipment failure could be noted, but often the equipment was not corresponding with the experience and the weight of the pilot. To reduce the frequency of paragliding-injuries an accurate choice of equipment and an increased attention to environmental factors is mandatory. Furthermore an education-program regarding the attitude and intelligence of the pilot should be included in training courses. PMID:1467020

  3. The Amplituhedron from Momentum Twistor Diagrams

    E-print Network

    Yuntao Bai; Song He

    2014-08-11

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

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

    NASA Astrophysics Data System (ADS)

    Sannikov, D. G.

    2012-11-01

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

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

    E-print Network

    Horowitz, Roberto

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

  6. Risk and protection factors in fatal accidents.

    PubMed

    Dupont, Emmanuelle; Martensen, Heike; Papadimitriou, Eleonora; Yannis, George

    2010-03-01

    This paper aims at addressing the interest and appropriateness of performing accident severity analyses that are limited to fatal accident data. Two methodological issues are specifically discussed, namely the accident-size factors (the number of vehicles in the accident and their level of occupancy) and the comparability of the baseline risk. It is argued that - although these two issues are generally at play in accident severity analyses - their effects on, e.g., the estimation of survival probability, are exacerbated if the analysis is limited to fatal accident data. As a solution, it is recommended to control for these effects by (1) including accident-size indicators in the model, (2) focusing on different sub-groups of road-users while specifying the type of opponent in the model, so as to ensure that comparable baseline risks are worked with. These recommendations are applied in order to investigate risk and protection factors of car occupants involved in fatal accidents using data from a recently set up European Fatal Accident Investigation database (Reed and Morris, 2009). The results confirm that the estimated survival probability is affected by accident-size factors and by type of opponent. The car occupants' survival chances are negatively associated with their own age and that of their vehicle. The survival chances are also lower when seatbelt is not used. Front damage, as compared to other damaged car areas, appears to be associated with increased survival probability, but mostly in the case in which the accident opponent was another car. The interest of further investigating accident-size factors and opponent effects in fatal accidents is discussed. PMID:20159090

  7. [Hanggliding accidents. Distribution of injuries and accident analysis].

    PubMed

    Ballmer, F T; Jakob, R P

    1989-12-01

    Paragliding--a relatively new sport to Switzerland--brought 23 patients with 48 injuries (38% lower limb and 29% spinal) within a period of 8 months to the Inselspital University hospital in Berne. The aim of the study in characterizing these injuries is to formulate some guidelines towards prevention. With over 90% of accidents occurring at either take off or landing, emphasis on better training for the beginner is proposed with strict guidelines for the more experienced pilot flying in unfavourable conditions. PMID:2617285

  8. MSHA releases data on CM crushing accidents

    SciTech Connect

    NONE

    2007-02-15

    The US Mine Safety and Health Administration (MHSA) recently formed a committee to identify norms and trends in remote control continuous miner crushing accidents. The final report found that these types of accidents commonly happen to experienced miners during routine mining activities, with the majority occurring while moving the miner from one face to another, place changing. Another common aspect of the accidents is that many of the victims are experienced miners who are newly employed at the mine where the accident occurred. Training all employees to stay outside the turning radius of an energized remote control continuous miner, establishing this as a safe operating procedure, and consistently enforcing this practice among miners will reduce these types of accidents. This article was excerpted from the 'Remote Control Continuous Mining Machine Crushing Accident Data Study' published in May 2006. The report may be found from the website: www.msha.gov. 4 figs., 1 tab.

  9. Phase diagram to design passive nanostructures

    E-print Network

    Lee, Jeng Yi

    2015-01-01

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

  10. x DYNAMIC INFLUENCE DIAGRAMS: APPLICATIONS TO

    E-print Network

    Hazen, Gordon

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

  11. Sequential influence diagrams: A unified asymmetry framework

    E-print Network

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

    2006-05-01

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

  12. ConcepTest: Relative Time Diagram #4

    NSDL National Science Digital Library

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

  13. A Feynman diagram analyzer DIANA: recent development

    E-print Network

    M. Tentyukov; J. Fleischer

    2002-10-11

    New developments concerning the extension of the Feynman diagram analyzer DIANA are presented. We discuss new graphic facilities, application of DIANA to processes with Majorana fermions and different approaches to automation of momenta distribution.

  14. Communicating Phylogeny: Evolutionary Tree Diagrams in Museums

    E-print Network

    MacDonald, Teresa; Wiley, Edward O.

    2012-01-01

    Tree of life diagrams are graphic representations of phylogeny—the evolutionary history and relationships of lineages—and as such these graphics have the potential to convey key evolutionary ideas and principles to a variety of audiences. Museums...

  15. 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.

  16. ConcepTest: Relative Time Diagram #1

    NSDL National Science Digital Library

    Match the features in the relative time diagram below with the events described in the short sentence. Assume all rocks are sedimentary unless otherwise indicated. Which is the oldest rock unit? a. A b. B c. C d. D ...

  17. Revised Diagnostic Diagrams for Planetary Nebulae

    E-print Network

    H. Riesgo; J. A. López

    2006-02-08

    Diagnostic diagrams of electron density - excitation for a sample of 613 planetary nebulae are presented. The present extensive sample allows the definition of new statistical limits for the distribution of planetary nebulae in the log [Ha/[SII

  18. A Smart Thermal Block Diagram Tool

    NASA Technical Reports Server (NTRS)

    Tsuyuki, Glenn; Miyake, Robert; Dodge, Kyle

    2008-01-01

    The presentation describes a Smart Thermal Block Diagram Tool. It is used by JPL's Team X in studying missions during the Pre-Phase A. It helps generate cost and mass estimates using proprietary data bases.

  19. ConcepTest: Relative Time Diagram #2

    NSDL National Science Digital Library

    Match the features in the relative time diagram below with the events described in the short sentences. Assume all rocks are sedimentary unless otherwise indicated. Which unit was formed before A but after E? a. C ...

  20. 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

  1. 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, ...

  2. Context Aware On-line Diagramming Recognition

    Microsoft Academic Search

    Mudit Agrawal; Alexander Zotov; Ming Ye; Sashi Raghupathy

    2010-01-01

    This paper presents a context aware, online immediate-mode diagramming recognition and beautification software for hand-sketched diagrams. The system is independent of stroke-order, -number, -direction and is invariant to scaling, translation and rotation. In our stroke-based recognition model, we propose convexity features along with spatial and temporal proximity features to prune the combinatorial search space of possible stroke configurations to form

  3. Campbell diagrams of weakly anisotropic flexible rotors

    Microsoft Academic Search

    Oleg N. Kirillov

    2009-01-01

    We consider an axi-symmetric rotor perturbed by dissipative, conservative,\\u000aand non-conservative positional forces originated at the contact with the\\u000aanisotropic stator. The Campbell diagram of the unperturbed system is a\\u000amesh-like structure in the frequency-speed plane with double eigenfrequencies\\u000aat the nodes. The diagram is convenient for the analysis of the traveling waves\\u000ain the rotating elastic continuum. Computing sensitivities

  4. Campbell diagrams of weakly anisotropic flexible rotors

    Microsoft Academic Search

    O. N. Kirillov

    2009-01-01

    We consider an axi-symmetric rotor perturbed by dissipative, conservative, and non-conservative positional forces originated at the contact with the anisotropic stator. The Campbell diagram of the unperturbed system is a mesh-like structure in the frequency-speed plane with double eigenfrequencies at the nodes. The diagram is convenient for the analysis of the traveling waves in the rotating elastic continuum. Computing sensitivities

  5. Diffusion and phase diagram in binary alloys

    Microsoft Academic Search

    J. Mimkes; M. Wuttig

    1996-01-01

    The relationship betwwen diffusion and phase diagram is discussed in more detail for Ag?Au and Au?Ni alloys. For each alloy tracer diffusion and interdiffusion data have been compared with the corresponding phase diagram.Tracer diffusion is related to the solid-liquid phase transition. Ag and Au tracer diffusivities D?(x) in Ag?Au alloys and melting temperature Tm(x) of Ag?Au show opposite curvatures. The

  6. 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.

  7. 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,

  8. Bode Diagrams of Transfer Functions and Impedances

    Microsoft Academic Search

    R. W. Erickson

    In the design of a signal processing network, control system, or other analog system, it is usually necessary to work with frequency-dependent transfer functions and impedances, and to construct Bode diagrams. The Bode diagram is a log-log plot of the magnitude and phase of an impedance, transfer function, or other frequency-dependent complex-valued quantity, as a function of the frequency of

  9. Accident cost saving and highway attributes

    Microsoft Academic Search

    David J. Forkenbrock; Norman S. J. Foster

    1997-01-01

    Two semi-logarithmic regression models are developed to estimate accident rates and accident costs, respectively, for rural non-interstate highways in the state of Iowa. Data on 21,224 accidents occurring between 1989 and 1991 on 17,767 road segments are used in the analysis. Seven road attributes of these road segments are included as predictor variables. Applying the resulting regression models to a

  10. [Expert opinions in German statutory accident insurance].

    PubMed

    Widder, B; Gaidzik, P W

    2012-02-01

    German statutory accident insurance covers employees and trainees against occupational accidents, employers bear the inherent charges. Expert opinion is obtained, in particular, for discussing causality questions and for rating accidental health disorders. Causality has to be estimated based on the "theory of essential condition", health disorders have to be substantiated without any reasonable doubt. Reduction in earning capacity due to an accident may not consider the individual kind of occupation and has to be rated by an abstract approach. PMID:22161230

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

    SciTech Connect

    Ryan, G.W., Westinghouse Hanford

    1996-07-12

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

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

    SciTech Connect

    Ryan, G.W., Westinghouse Hanford

    1996-09-19

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

  13. 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.

  14. General situation of radiation accidents in China.

    PubMed

    Li, Zhou; Wenyi, Zhang; Liang'an, Zhang

    2007-01-01

    Information on radiation accidents in China compiled by the health authorities was collected. About 468 accidents were reported in 1988-2004. Detailed data from 1988 to 1998 were analysed. As to the 332 accidents reported in 1988-98, 77.7% of the cases are related to lost sources, 84.64% are liability accidents and five persons died owing to the cases occurring in the application of gamma irradiators. It is essential to improve the data bank to manage radiation sources, and to make sure that the relevant laws, together with professional theory and technical knowledge, are disseminated well and learned by professionals. PMID:17561521

  15. Thermal hydraulic features of the TMI accident

    NASA Astrophysics Data System (ADS)

    Tolman, B.

    1985-10-01

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

  16. 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.

  17. Accident selection methodology for TA-55 FSAR

    SciTech Connect

    Letellier, B.C.; Pan, P.Y.; Sasser, M.K. [and others

    1995-07-01

    In the past, the selection of representative accidents for refined analysis from the numerous scenarios identified in hazards analyses (HAs) has involved significant judgment and has been difficult to defend. As part of upgrading the Final Safety Analysis Report (FSAR) for the TA-55 plutonium facility at the Los Alamos National Laboratory, an accident selection process was developed that is mostly mechanical and reproducible in nature and fulfills the requirements of the Department of Energy (DOE) Standard 3009 and DOE Order 5480.23. Among the objectives specified by this guidance are the requirements that accident screening (1) consider accidents during normal and abnormal operating conditions, (2) consider both design basis and beyond design basis accidents, (3) characterize accidents by category (operational, natural phenomena, etc.) and by type (spill, explosion, fire, etc.), and (4) identify accidents that bound all foreseeable accident types. The accident selection process described here in the context of the TA-55 FSAR is applicable to all types of DOE facilities.

  18. The determinants of fishing vessel accident severity.

    PubMed

    Jin, Di

    2014-05-01

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

  19. Summer activities: incidents and accidents.

    PubMed

    Krau, Stephen D

    2013-06-01

    Summer invites activities and sports that are unique to this time of year. Although safety is a priority, there are commonly accidents and incidents that occur while individuals are participating in these activities. The prevalence and incidence of several types of injuries and trauma related to water activities, camping, caving, backpacking, and hiking are discussed. Treatment of nonfatal drowning is discussed, along with the pathophysiologic process that must be corrected for optimal outcomes. Summer is a time for outdoor cooking, campfires, and the traditional Fourth of July firework pastimes, which can result in admissions to critical care areas. PMID:23692945

  20. 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...

  1. 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...

  2. 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...

  3. 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...

  4. 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...

  5. An Integrated Semantics for UML Class, Object and State Diagrams

    E-print Network

    Gogolla, Martin - Fachbereich 3

    structural or behav- ioral aspects. From a fundamental point of view, class and state diagrams are the basic and state diagrams can be employed for describing the fundamental object behavior. Graph transformation are fundamental diagrams of the UML. In the following we shortly illustrate both diagram types. For further

  6. Threshold queueing describes the fundamental diagram of uninterrupted traffic

    E-print Network

    Boucherie, Richard J.

    Threshold queueing describes the fundamental diagram of uninterrupted traffic Niek Baer, Richard J and a novel threshold queue that captures the main aspects of the empiri- cal shape of the fundamental diagram of the fundamental diagram. Keywords: Threshold queue, Hysteresis, Capacity drop, Fundamental diagram, Matrix

  7. The Use of Computational Diagrams and Nomograms in Higher Education.

    ERIC Educational Resources Information Center

    Brandenburg, Richard K.; Simpson, William A.

    1984-01-01

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

  8. 36 CFR 4.4 - Report of motor vehicle accident.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

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

  9. 32 CFR 636.13 - Traffic accident investigation reports.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 true Traffic accident investigation reports. 636...Stewart, Georgia § 636.13 Traffic accident investigation reports. In...Airfield installations will record traffic accident investigations on DA Form...

  10. 32 CFR 636.13 - Traffic accident investigation reports.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Traffic accident investigation reports. 636...Stewart, Georgia § 636.13 Traffic accident investigation reports. In...Airfield installations will record traffic accident investigations on DA Form...

  11. 36 CFR 1004.4 - Report of motor vehicle accident.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

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

  12. 32 CFR 634.29 - Traffic accident investigation reports.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Traffic accident investigation reports. 634...Traffic Supervision § 634.29 Traffic accident investigation reports. ...enforcement officials will record traffic accident investigations on...

  13. 36 CFR 1004.4 - Report of motor vehicle accident.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

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

  14. 36 CFR 4.4 - Report of motor vehicle accident.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

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

  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. Traumatic aortic incompetence following road traffic accident

    Microsoft Academic Search

    J. B. Irving

    1974-01-01

    This case report describes the presentation and treatment of a case of aortic incompetence, resulting from a road traffic accident. The relevant literature is briefly reviewed.Aortic incompetence due to trauma has been described following non-penetrating chest injuries, such as kicks from horses (Barie, 1881), falls from heights and crushing accidents (Kissane, Koons and Clark, 1948; Levine, Roberts and Morrow, 1962).

  17. Bayesian networks and traffic accident reconstruction

    Microsoft Academic Search

    Gary A. Davis; Jianping Pei

    2003-01-01

    The attempt to draw rational conclusions about a road accident can be viewed as a problem in uncertain reasoning about a particular event, to which developments in the modeling of uncertain reasoning for artificial intelligence can be applied. Physical principles can be used to develop a structural model for the accident, and this model can then be combined with an

  18. Does Daylight Savings Time Affect Traffic Accidents?

    E-print Network

    Deen, Sophia 1988-

    2012-04-20

    This paper studies the effect of changes in accident pattern due to Daylight Savings Time (DST). The extension of the DST in 2007 provides a natural experiment to determine whether the number of traffic accidents is affected by shifts in hours...

  19. Injury reduction by the airbag in accidents

    Microsoft Academic Search

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

    1996-01-01

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

  20. Assessing the Effects of a Nuclear Accident

    Microsoft Academic Search

    Colin Norman

    1985-01-01

    Studies prompted by the accident at Three Mile Island which indicate that radiation released by a severe accident may be less than expected could have implications for nuclear regulation, emergency planning, and nuclear reactor design, but critics are not convinced. They contend that uncertainties in estimates of what would happen due to the diversity of plant designs are too great

  1. Truck accident involving unirradiated nuclear fuel

    Microsoft Academic Search

    R. W. Carlson; L. E. Fischer

    1992-01-01

    In the early morning of Dec. 16, 1991, a severe accident occurred when a passenger vehicle traveling in the wrong direction collided with a tractor trailer carrying 24 nuclear fuel assemblies in 12 containers on Interstate 1-91 in Springfield, Massachusetts. This paper documents the mechanical circumstances of the accident and the physical environment to which the containers were exposed and

  2. Accident risks in nuclear-power plants

    Microsoft Academic Search

    A. Strupczewski

    2003-01-01

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

  3. Squeal Those Tires! Automobile-Accident Reconstruction.

    ERIC Educational Resources Information Center

    Caples, Linda Griffin

    1992-01-01

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

  4. Characterization of a nuclear accident dosimeter

    Microsoft Academic Search

    Burrows

    1995-01-01

    The 23rd nuclear accident dosimetry intercomparison was held during the week of June 12--16, 1995 at Los Alamos National Laboratory. This report presents the results of this event, referred to as NAD 23, as related to the performance of Sandia National Laboratories (SNL) personal nuclear accident dosimeter (PNAD). Two separate critical assemblies, SHEBA and Godiva, were used to generate seven

  5. 2. Oracle Designer I: ER-Diagrams 2-1 Part 2: ER-Diagrams

    E-print Network

    Brass, Stefan

    2. Oracle Designer I: ER-Diagrams 2-1 Part 2: ER-Diagrams in Oracle Designer References: · Barker. · Koletzke/Dorsey: Oracle Designer Handbook, 2nd Edition. ORACLE Press, 1998, ISBN 0-07-882417-6, ca. $40. · A. Lulushi: Inside Oracle Designer/2000. Prentice Hall, 1998, ISBN 0-13-849753-2, ca. $50. · Oracle

  6. The Semiotic Structure of Geometry Diagrams: How Textbook Diagrams Convey Meaning

    ERIC Educational Resources Information Center

    Dimmel, Justin K.; Herbst, Patricio G.

    2015-01-01

    Geometry diagrams use the visual features of specific drawn objects to convey meaning about generic mathematical entities. We examine the semiotic structure of these visual features in two parts. One, we conduct a semiotic inquiry to conceptualize geometry diagrams as mathematical texts that comprise choices from different semiotic systems. Two,…

  7. Voronoi diagram of a circle set from Voronoi diagram of a point set: I. Topology

    Microsoft Academic Search

    Deok-soo Kim; Donguk Kim; Kokichi Sugihara

    2001-01-01

    In this and the following papers, we present an algorithm to compute the exact Voronoi diagram of a circle set from the Voronoi diagram of a point set. The circles are located in a two dimensional Euclidean space, the radii of the circles are non-negative and not necessarily equal, and the circles are allowed to intersect each other.The idea of

  8. 6. UML Class Diagrams 6-1 Part 6: UML Class Diagrams

    E-print Network

    Brass, Stefan

    6. UML Class Diagrams 6-1 Part 6: UML Class Diagrams References: · Grady Booch, James Rumbaugh Scott: UML Distilled, Second Edition. Addison-Wesley, 2000, ISBN 0-201-65783-X, 185 pages. · Terry Quatrani: Visual Modeling with Rational Rose 2000 and UML. Addison-Wesley, 2000, ISBN 0-201-69961-3, 256

  9. 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

  10. Introduction to causal diagrams for confounder selection.

    PubMed

    Williamson, Elizabeth J; Aitken, Zoe; Lawrie, Jock; Dharmage, Shyamali C; Burgess, John A; Forbes, Andrew B

    2014-04-01

    In respiratory health research, interest often lies in estimating the effect of an exposure on a health outcome. If randomization of the exposure of interest is not possible, estimating its effect is typically complicated by confounding bias. This can often be dealt with by controlling for the variables causing the confounding, if measured, in the statistical analysis. Common statistical methods used to achieve this include multivariable regression models adjusting for selected confounding variables or stratification on those variables. Therefore, a key question is which measured variables need to be controlled for in order to remove confounding. An approach to confounder-selection based on the use of causal diagrams (often called directed acyclic graphs) is discussed. A causal diagram is a visual representation of the causal relationships believed to exist between the variables of interest, including the exposure, outcome and potential confounding variables. After creating a causal diagram for the research question, an intuitive and easy-to-use set of rules can be applied, based on a foundation of rigorous mathematics, to decide which measured variables must be controlled for in the statistical analysis in order to remove confounding, to the extent that is possible using the available data. This approach is illustrated by constructing a causal diagram for the research question: 'Does personal smoking affect the risk of subsequent asthma?'. Using data taken from the Tasmanian Longitudinal Health Study, the statistical analysis suggested by the causal diagram approach was performed. PMID:24447391

  11. Dynamic tactile diagram simplification on refreshable displays.

    PubMed

    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, cumbersome, and costly process. Refreshable haptic displays, which interact with computers, promise to make this access quicker, easier, and cheaper. One important aspect in converting visual to tactile diagrams is to simplify the diagram as otherwise it can be too difficult to interpret with touch. Enabling this to be under user control in an interactive environment, such as with refreshable displays, could allow users to avoid being overwhelmed by the diagrams at any instant in time while still retaining access to all information in "storage". Through this article the authors investigate whether two types of diagram simplification--boundary simplification and contextual simplification--showed potential utility in an interactive environment. Boundary simplification was found to be significantly helpful in answering general questions about borders on a geographic map, and contextual simplification was helpful in answering relational questions, as compared to using the original map unchanged. PMID:23527429

  12. 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.

  13. Human Factors in Cabin Accident Investigations

    NASA Technical Reports Server (NTRS)

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

    1996-01-01

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

  14. Pilot-error accidents: male vs female.

    PubMed

    Vail, G J; Ekman, L G

    1986-12-01

    In this study, general aviation accident records from the files of the National Transportation Safety Board (NTSB), have been analysed by gender to observe the number and rate of pilot-error related accidents from 1972 to 1981 inclusive. If both females and males have no difference in performance, then data would have indicated similarities of accident rates and types of injuries. Males had a higher rate of accidents than females, and a higher portion of the male accidents resulted in fatalities or serious injuries than for females. Type of certificate, age, total flight time, flight time in type of aircraft, phase of operation, category of flying, degree of injury, specific cause factors, cause factor miscellaneous acts/conditions were analysed, taking the total number of United States Active Civilian General Aviation Pilots into consideration. The data did indicate a difference in all variables. PMID:15676598

  15. The renormalon diagram in gauge theories on

    NASA Astrophysics Data System (ADS)

    Anber, Mohamed M.; Sulejmanpasic, Tin

    2015-01-01

    We analyze the renormalon diagram of gauge theories on . In particular, we perform exact one loop calculations for the vacuum polarization in QCD with adjoint matter and observe that all infrared logarithms, as functions of the external momentum, cancel between the vacuum part and finite volume part, which eliminates the IR renormalon problem. We argue that the singularities in the Borel plane, arising from the topological neutral bions, are not associated with the renormalon diagram, but with the proliferation of the Feynman diagrams. As a byproduct, we obtain, for the first time, an exact one-loop result of the vacuum polarization which can be adapted to the case of thermal compactification of QCD.

  16. Techniques for Calculating two-loop Diagrams

    E-print Network

    J. Fleischer; O. L. Veretin

    1999-01-25

    Methods developed by the Bielefeld-DESY-Dubna collaboration in recent years are: DIANA (DIagram ANAlyser), a program to produce ``FORM input'' for Feynman diagrams, starting from the Feynman rules; methods to calculate scalar diagrams: Taylor expansion in small momenta squared in connection with a mapping and the Pad\\'{e} method to sum the series. Recently program packages for the large mass expansion were written and applied to the $Z \\to b\\bar{b}$ decay. Reviews of these activities were presented in the proceedings of the Ustro\\'{n} '97 and Rheinsberg '98 conferences. Here we concentrate on recent developements in the large mass expansion, applied to the two-loop contribution of the $Z \\to b\\bar{b}$ decay in the $m_b=0$ approximation, taking into account higher order terms of the expansion in $M_W^2/m_t^2$.

  17. Pseudoxanthoma elasticum with cerebrovascular accident.

    PubMed

    Kumar, G Nanda; Ragi, K V; Nair, Pradeep S

    2007-01-01

    A 65-year-old male presented with right hemiparesis and skin lesions. On examination, the patient had multiple, discrete, skin-colored papules on the neck and upper chest with wrinkling of the skin. The lateral part of the trunk and medial aspect of both upper arms showed atrophic plaques. A computerized tomography scan of the head showed dilatation of the basilar artery with a frontoparietal infarct. Funduscopic examination showed characteristic angioid streaks. Skin biopsy of the papule and atrophic plaques showed epidermal atrophy, calcium deposits in the mid-dermis and basophilic clumped and fragmented elastic fibers in the mid- and lower dermis, all findings consistent with pseudoxanthoma elasticum. We are reporting here a case of pseudoxanthoma elasticum with cerebrovascular accident. PMID:17558055

  18. Diving injuries are (usually) no accident.

    PubMed

    Buzzacott, Peter

    2015-03-01

    When recently submitting a manuscript to DHM, I noticedthat three of our keywords contain the word accident, namely 'accidents', 'diving accidents' and 'scuba accidents'. 'Accident' is most strictly defined in the legal sense thus: "… the word accident is used only for events that occur without the intervention of a human being. This kind of accident also may be called an act of God. It is an event that no person caused or could have prevented - such as a tornado, a tidal wave, or an ice storm." In a review of cave diving fatalities, the medical examiner's cause of death in each case (n = 368) was considered and, from these and their extensive case files, case histories were traced back through the disabling injury to the triggering event. In the majority of cases there was a clear breach of established safe procedures. The number of 'accidents' where, for example, a cave unexpectedly collapsed was rare, by far the exception. Including these words in our approved list is at odds with the stable of British Medical Journal publications, (e.g., Injury Prevention) which have dissuaded use of the word 'accident' since 1993 and banned the word since 2001. Since 2004, at considerable expense, many former NHS hospital accident and emergency wards in the UK have steadily been renamed emergency departments. The Journal of Accident and Emergency Medicine has been renamed Emergency Medicine Journal and, as recently as last year, the New York Police Department changed the name of their Accident Investigation Squad to Collision Investigation Squad. They also no longer use the word 'accident' in their reports, following the lead of the US Department of Transportation's National Highway Traffic Safety Administration which stopped using the word in all its printed material in 1997, claiming it "…promotes the concept that these events are outside of human influence or control."(p.1.) There are many such examples of this subtle yet important change that is overtaking both western medicine and, in particular, public health. Rather than 'accident' the current trend is to accurately describe the cause of an injury. To illustrate, a submission formerly entitled 'Hot water accidents in Welsh children' would now more likely be titled 'Hot water burns in Welsh children'. The difference should be obvious; hot water burns in children are largely avoidable, (as are diving injuries). Therefore, I respectfully request we remove these key words from our journal's list. Hopefully this would not inconvenience some of our European colleagues for whom English is a second language, and this should be considered. In France, for example, decompression sickness (DCS) is known as an "accident de desaturation" and decompression illness (DCI, including arterial gas embolism), is initially described in French as an accident de decompression (ADD). After all signs and symptoms are identified, commonly at around 24 h, then the injury is termed a "maladie de decompression" (MDD). The Canadian Government department responsible for aviation, Transports Canada, also refer to DCS/DCI as MDD. The BMJ makes exceptions, e.g., if the word appears in a formal title such as Child Accident Prevention Trust. Regarding ADD however, may I respectfully suggest to my French colleagues they consider adopting "blessure de décompression" (BDD)? In diving research at least, the leading hypothesis is that DCS may be prevented through better understanding of the mechanisms of this protean disease. That DCS is an 'accident' is the null hypothesis. PMID:25964042

  19. [A study on fall accident].

    PubMed

    Lee, H S; Kim, M J

    1997-01-01

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

  20. Warning: accident at Three Mile Island

    SciTech Connect

    Gray, M.; Rosen, I.

    1982-01-01

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

  1. Three-Dimensional Feature Diagrams Visualization

    Microsoft Academic Search

    Pablo Trinidad; Antonio Ruiz Cortés; David Benavides; Sergio Segura

    2008-01-01

    Visualizing and manipulating large feature diagrams is still an open issue for the SPL community. Few effort has been made on improving the techniques to get the most out of drawing space and current feature modeling tools either use file-system-like trees or 2D graphs that must be scrolled to locate features. The aim of this paper is presenting a new

  2. Commutation classes of double wiring diagrams

    E-print Network

    Dukes, Patrick

    2010-01-01

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

  3. Taylor Expansion Diagrams: A Canonical Representation for

    E-print Network

    Kalla, Priyank

    ], Binary Moment Diagrams (BMDs) [2], and their variants (PHDDs [3], K*BMDs [4], etc.) play an important equivalence verification of designs specified at the behavioral level [5], [6]. Similar to BDDs and BMDs, TED is a canonical, graph-based represen- tation. In contrast to BDDs and BMDs, TED is based on a nonbinary

  4. An ASM Semantics for UML Activity Diagrams

    Microsoft Academic Search

    Egon Börger; Alessandra Cavarra; Elvinia Riccobene

    2000-01-01

    . We provide a rigorous semantics for one of the central diagramtypes which are used in UML for the description of dynamicalsystem behavior, namely activity diagrams. We resolve for these diagramssome of the ambiguities which arise from dierent interpretationsof UML models. Since we phrase our denition in terms of Abstract StateMachines, we dene at the same time an interesting subclass

  5. Phase diagram of half doped manganites

    Microsoft Academic Search

    Luis Brey

    2005-01-01

    An analysis of the properties of half doped manganites is presented. We buildup the phase diagram of the system combining a realistic calculation of the electronic properties and a mean field treatment of the temperature effects. The electronic structure of the manganites are described with a double exchange model with cooperative Jahn-Teller phonons and antiferromagnetic coupling between the Mn core

  6. Parallel Computation of Feynman diagrams with DIANA

    E-print Network

    M. Tentyukov; J. Fleischer

    2003-11-09

    Co-operation of the Feynman DIagram ANAlyzer (DIANA) with the underlying operational system (UNIX) is presented. We discuss operators to run external commands and a recent development of parallel processing facilities and an extension in the spirit of a component model.

  7. Engineering line diagram development from process flowsheets

    Microsoft Academic Search

    S. Long; P. D. B. Bujac; D. C. Woodcock; M. L. Preston; A. G. Rushton; I. W. Cumming

    2001-01-01

    The PREMIUM methodology is presented. This methodology provides a structured approach to the development of engineering line diagrams from process flowsheets. The generation of the method through a series of ‘synthesis’ and ‘evaluation’ steps is described. The structural features of the method—the different levels, groups, objectives and thought prompts are detailed. Associated ‘support tools’ for handling operating states and transitions

  8. Engineering line diagram development from process flowsheets

    Microsoft Academic Search

    S. Long; P. D. B. Bujac; D. C. Woodcock; M. L. Preston; A. G. Rushton; I. W. Cumming

    2000-01-01

    Engineering line diagram (ELD) development forms a distinct phase in process plant design. It is a complex and expensive activity and as such warrants considerable effort to minimise costs and maximise effectiveness. In this paper, the nature of the ELD design task is analysed in order to understand how it could be carried out more effectively. A number of shortfalls

  9. Enhanced Pomeron diagrams: Resummation of unitarity cuts

    SciTech Connect

    Ostapchenko, S. [Forschungszentrum Karlsruhe, Institut fuer Kernphysik, 76021 Karlsruhe (Germany); D.V. Skobeltsyn Institute of Nuclear Physics, Moscow State University, 119992 Moscow (Russian Federation)

    2008-02-01

    Unitarity cuts of enhanced Pomeron diagrams are analyzed in the framework of the Reggeon field theory. Assuming the validity of the Abramovskii-Gribov-Kancheli cutting rules, we derive a complete set of cut nonloop enhanced graphs and observe important cancellations between certain subclasses of the latter. We demonstrate also how the present method can be generalized to take into consideration Pomeron loop contributions.

  10. Solar magnetic flux tube emergence diagram

    Microsoft Academic Search

    P. AmbroŽ; E. V. Kononovich

    1994-01-01

    It is emphasized that photospheric downdrafts represent the main feature common to both quit and active regions of the solar atmosphere. The results of the magnetic field transport velocity calculations are used to specify the convection zone magnetic structure. The concept of combined interface and convection dynamo is suggested. A time-spatial diagram is proposed to represent an active region evolution.

  11. Fission stability diagram of sup 240 Pu

    SciTech Connect

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

    1989-09-01

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

  12. 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…

  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. 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.

  15. Thermal analysis and alloy phase diagrams

    Microsoft Academic Search

    R. Ferro; A. Saccone

    2004-01-01

    A summary of the activity performed in the investigation of metallic alloys over many years is presented.General attention is given to research carried out by using thermoanalytical techniques and their application to the determination of phase diagrams. The results obtained in the systematic investigation of several binary and ternary systems involving rare earth metals are briefly outlined and discussed within

  16. NFHS Court and Field Diagram Guide.

    ERIC Educational Resources Information Center

    Gillis, John, Ed.

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

  17. ECE 423: DSP for Communication Block Diagrams

    E-print Network

    Schumacher, Russ

    ECE 423: DSP for Communication Block Diagrams Discrete-time System Analysis/Design Sampling and Quantization DSP System Design/Characterization Real-time DSP Hardware and Software - Understands basic signal Deviations from ideal: quantization noise, numerical precision. DSP building blocks: FIR/IIR, differentiator

  18. 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.

  19. Ink Features for Diagram Recognition Rachel Patel

    E-print Network

    Goodman, James R.

    Ink Features for Diagram Recognition Rachel Patel 1 , Beryl Plimmer 1 , John Grundy 1, 2 , Ross of formal methods to select the most appropriate ink features for recognition algorithms. We have used a statistical approach to identify the most important distinguishing features of ink for dividing text

  20. 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

  1. International Symposium on Fundamental Diagram -,,Greenshields 75"

    E-print Network

    Bertini, Robert L.

    International Symposium on Fundamental Diagram - ,,Greenshields 75" Influence of Various@pk.edu.pl sgaca@pk.edu.pl #12;With less freedom of traffic, the average speed of traffic flow decreases. This can be seen in all models, which represent relationships between the speed of a traffic stream V , flow Q

  2. Abstract Euler Diagram Isomorphism Gem Stapleton

    E-print Network

    Kent, University of

    g.e.stapleton@brighton.ac.uk Andrew Fish Visual Modelling Group University of Brighton, UK andrew.fish. This equivalence means that the techniques presented in this paper are applicable to hypergraphs. After providing some method for embed- ding curves in the plane. Diagram generation using these algorithms is a time

  3. 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…

  4. 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.

  5. Proposal for computer investigation of LMFBR core meltdown accidents

    Microsoft Academic Search

    J. E. Boudreau; F. H. Harlow; W. H. Reed; J. F. Barnes

    1974-01-01

    The environmental consequences of an LMFBR accident involving breach of ; containment are so severe that such accidents must not be allowed to happen. ; Present methods for analyzing hypothetical core disruptive accidents like a loss ; of flow with failure to scram cannot show conclusively that such accidents do not ; lead to a rupture of the pressure vessel.

  6. 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

  7. Probabilistic Approach to Analysis of Death Traffic Accidents

    Microsoft Academic Search

    Evgenia Suzdaleva; Ivan Nagy

    The paper is devoted to analysis of data related to traffic accidents at one of the roads in Czech Republic. The data sets are available as discrete-valued variables providing results of traffic accident (with death or not) as well as conditions under which the accident has happened (weather, visibility, speed etc). Situation of a traffic accident is modeled within state-space

  8. Considerations in the development of severe-accident strategies

    Microsoft Academic Search

    R. J. Jr. Lutz; R. Prior; R. Bastien

    1990-01-01

    A set of proceduralized severe-accident strategies was developed for Ringhals pressurized water reactor units (beyond emergency response guidelines (BERGs)) to provide guidance in the event of an accident that progresses to core damage. The development of the ringhals severe-accident guidance was a three-phase program: Phase 1 - development of the fundamental strategy for dealing with severe accidents; Phase 2 -

  9. Traffic Accident Treatment Expert System Based on Integrated Reasoning

    Microsoft Academic Search

    Bing Xu; Wen-hua Yan

    2009-01-01

    In order to handle the traffic accidents timely and accurately and draw conclusions from them to formulate measures of preventing similar accidents, an expert system with integrated reasoning method is put forward and applied to traffic accident treatment according to the characteristics of traffic accidents. This method adopts an integrated reasoning approach in which the CBR (case-based reasoning) is the

  10. Accidents in the chemical industry: are they foreseeable?

    Microsoft Academic Search

    Peter J. M. Sonnemans; Patrick M. W. Körvers

    2006-01-01

    Accidents recur,’ which is what Kletz [Kletz T. (1993). Lessons from disasters, how organisations have no memory and accidents recur. UK: Institution of Chemical Engineers] wrote in 1993. Indeed, despite all measures taken accidents may re-occur, but ‘disruptions’ in a process reoccur much more frequently. If a disruption occurs it may lead to an accident. If the same disruption reoccurs

  11. General model of accident rate growth in the construction industry

    Microsoft Academic Search

    Bozena Hola

    2007-01-01

    The accident level in sectors of the national economy is estimated from such data as: the number of persons employed in the analysed sector, the number of victims of accidents at work and the frequency and seriousness of the accidents. The data have a static character: they inform about the accident level in the analysed period but not about its

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

    E-print Network

    Mariusz Tarnopolski

    2013-06-13

    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.

  13. 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...

  14. 32 CFR 644.532 - Reporting accidents.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...DEPARTMENT OF THE ARMY (CONTINUED) REAL PROPERTY REAL ESTATE HANDBOOK Disposal Clearance of Explosive Hazards and Other Contamination from Proposed Excess Land and Improvements § 644.532 Reporting accidents. Immediately upon receipt of...

  15. 32 CFR 644.532 - Reporting accidents.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...DEPARTMENT OF THE ARMY (CONTINUED) REAL PROPERTY REAL ESTATE HANDBOOK Disposal Clearance of Explosive Hazards and Other Contamination from Proposed Excess Land and Improvements § 644.532 Reporting accidents. Immediately upon receipt of...

  16. [Severe parachuting accident. Analysis of 122 cases].

    PubMed

    Krauss, U; Mischkowsky, T

    1993-06-01

    Based on a population of 122 severely injured patients the causes of paragliding accidents and the patterns of injury are analyzed. A questionnaire is used to establish a sport-specific profile for the paragliding pilot. The lower limbs (55.7%) and the lower parts of the spine (45.9%) are the most frequently injured parts of the body. There is a high risk of multiple injuries after a single accident because of the tremendous axial power. The standard of equipment is good in over 90% of the cases. Insufficient training and failure to take account of geographical and meteorological conditions are the main determinants of accidents sustained by paragliders, most of whom are young. Nevertheless, 80% of our patients want to continue paragliding. Finally some advice is given on how to prevent paragliding accidents and injuries. PMID:8342057

  17. 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.

  18. Stage line diagram: an age-conditional reference diagram for tracking development

    Microsoft Academic Search

    Stef van Buuren; Jeroen C. L. Ooms

    2009-01-01

    This paper presents a method for calculating stage line diagrams, a novel type of reference diagram\\u000auseful for tracking developmental processes over time. Potential fields of applications include: dentistry\\u000a(tooth eruption), oncology (tumor grading, cancer staging), virology (HIV infection and disease staging),\\u000apsychology (stages of cognitive development), human development (pubertal stages) and chronic diseases\\u000a(stages of dementia). Transition probabilities between

  19. Delay in ambulance dispatch to road accidents.

    PubMed Central

    Brodsky, H

    1992-01-01

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

  20. MELCOR analyses for accident progression issues

    SciTech Connect

    Dingman, S.E.; Shaffer, C.J.; Payne, A.C.; Carmel, M.K. (Sandia National Labs., Albuquerque, NM (USA))

    1991-01-01

    Results of calculations performed with MELCOR and HECTR in support of the NUREG-1150 study are presented in this report. The analyses examined a wide range of issues. The analyses included integral calculations covering an entire accident sequence, as well as calculations that addressed specific issues that could affect several accident sequences. The results of the analyses for Grand Gulf, Peach Bottom, LaSalle, and Sequoyah are described, and the major conclusions are summarized. 23 refs., 69 figs., 8 tabs.

  1. 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.

  2. Sleep related vehicle accidents on italian highways

    Microsoft Academic Search

    S. Garbarino; L. Nobili; M. Beelke; F. De Carli; V. Balestra; F. Ferrillo

    2001-01-01

    Sleepiness has been identified as a significant risk factor for vehicle accidents, and specific surveys are needed for Italy. The aim of this study was to assess incidence and characteristics of sleep-related vehicle-crashes on Italian highways. The database of the Italian National Institute of Statistics (1993-1997) was the source for the survey (50859 accidents with 1632 (3,2 %) ascribed to

  3. Truck accident involving unirradiated nuclear fuel

    SciTech Connect

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

    1992-07-01

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

  4. Truck accident involving unirradiated nuclear fuel

    SciTech Connect

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

    1992-07-01

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

  5. 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.

  6. 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

  7. Data Representation and Efficient Solution: A Decision Diagram Approach

    E-print Network

    Ciardo, Gianfranco

    Data Representation and Efficient Solution: A Decision Diagram Approach Gianfranco Ciardo Dept. of Computer Science and Engineering, UC Riverside, CA 92521, USA ciardo@cs.ucr.edu Abstract. Decision diagrams

  8. Algorithms in electric power system one-line diagram creation

    Microsoft Academic Search

    Imre Lendak; Aleksandar Erdeljan; Darko Capko; Srdan Vukmirovic

    2010-01-01

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

  9. Interval Diagrams: Increasing Efficiency of Symbolic Real-Time Verification

    Microsoft Academic Search

    Karsten Strehl; Timed Automata

    1999-01-01

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

  10. Penguin and box diagrams in unitary gauge

    NASA Astrophysics Data System (ADS)

    He, Xiao-Gang; Tandean, Jusak; Valencia, G.

    2009-12-01

    We evaluate one-loop diagrams in the unitary gauge that contribute to flavor-changing neutral current (FCNC) transitions involving two and four fermions. Specifically, we deal with penguin and box diagrams arising within the standard model (SM) and in nonrenormalizable extensions thereof with anomalous couplings of the W boson to quarks. We show explicitly in the SM the subtle cancellation among divergences from individual unitary-gauge contributions to some of the physical FCNC amplitudes and derive expressions consistent with those obtained using R ? gauges in the literature. Some of our results can be used more generally in certain models involving fermions and gauge bosons which have interactions similar in form to those we consider.

  11. 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.

  12. Modeling the Round Earth through Diagrams

    NASA Astrophysics Data System (ADS)

    Padalkar, Shamin; Ramadas, Jayashree

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

  13. Extracting parameters from colour-magnitude diagrams

    NASA Astrophysics Data System (ADS)

    Bonatto, C.; Campos, F.; Kepler, S. O.; Bica, E.

    2015-07-01

    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 characterized by different ages, metallicities and distances from the Sun.

  14. 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...

  15. 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...

  16. 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...

  17. 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...

  18. Optimal Automatic Drawing of One-Line Diagrams

    Microsoft Academic Search

    R. Canales-Ruiz; D. T. Garibay; A. Alonso-Concheiro

    1979-01-01

    An optimal one-line diagram generator algorithm is presented. The corresponding cctputer program drives the output device to draw a one-line diagram which is optimal in the sense that for a given drawing area, the minimum distance between elements of the diagram is a maximum. The computer program needs little additional information about the topology of the network to that normally

  19. Introducing 3D Venn and Euler Diagrams Peter Rodgers1

    E-print Network

    Kent, University of

    Introducing 3D Venn and Euler Diagrams Peter Rodgers1 , Jean Flower2 , and Gem Stapleton3 1 closed curves and have been widely studied. The advent of 3D display and interaction mechanisms means that extending these diagrams to 3D is now feasible. However, 3D versions of these diagrams have not yet been

  20. Triangular Diagrams Teach Steady and Dynamic Behaviour of Catalytic Reactions.

    ERIC Educational Resources Information Center

    Klusacek, K.; And Others

    1989-01-01

    Illustrates how triangular diagrams can aid in presenting some of the rather complex transient interactions that occur among gas and surface species during heterogeneous catalytic reactions. The basic equations and numerical examples are described. Classroom use of the triangular diagram is discussed. Several diagrams and graphs are provided. (YP)

  1. Global phase diagram for binary alloys with one magnetic component

    Microsoft Academic Search

    V. Talanquer; C. Varea; A. Robledo

    1989-01-01

    We describe the global mean-field phase diagram for a binary alloy that contains one magnetic component. We obtain 12 types of system phase diagrams, each of which displays a different interaction of chemical (segregration or ordering) and magnetic (ferromagnetic or antiferromagnetic) long-range order. Our results follow from the known features of the phase diagrams along the symmetric sections of Griffiths's

  2. 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...

  3. 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.

  4. Macroscopic Fundamental Diagram for Urban Streets and Mixed Traffic

    E-print Network

    Paris-Sud XI, Université de

    Macroscopic Fundamental Diagram for Urban Streets and Mixed Traffic: Cross-comparison of Estimation to incorporate exogenously effects of buses. The estimated macroscopic fundamental diagrams are then cross of these papers are based on the key idea that it exists a macroscopic fundamental diagram (MFD) able to reproduce

  5. Fundamental diagrams in urban roads myth or truth?

    E-print Network

    Bertini, Robert L.

    Fundamental diagrams in urban roads ­ myth or truth? Elmar Brockfeld, Nathan Gartner, Alexander] raw tt data sav_gol filtered raw data sav_gol filtered FCD data FCD 5 min data #12;Fundamental diagram: G/C is bigger than in the simulations #12;Conclusions Formally, a fundamental diagram may

  6. Clockwise Hysteresis Loops in the Macroscopic Fundamental Diagram

    E-print Network

    California at Berkeley, University of

    Clockwise Hysteresis Loops in the Macroscopic Fundamental Diagram Vikash V. Gayah and Carlos F in the Macroscopic Fundamental Diagram WORKING PAPER Vikash V. Gayah and Carlos F. Daganzo UC Berkeley Center A recent study reported that the Macroscopic Fundamental Diagram of a medium size city exhibited

  7. 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 to macroscopic traffic state parameters are proposed. Keywords: Fundamental Diagram, variable structure modeling In the nominal work of Greenshields (1934), the Fundament Diagram (FD) was defined and used as the relationship

  8. Fundamental diagram on urban roads - myth or truth?

    Microsoft Academic Search

    Elmar Brockfeld; Nathan H. Gartner; Alexander Sohr; Peter Wagner

    There is an ongoing discussion about the suitability of fundamen- tal diagrams(1) in urban networks. We have argued in favor of such a fundamental diagram (2), while some researchers deny that there is such a thing like a fundamental diagram on urban roads, since for any level of demand any travel time is possible (3). This contribution tries to sort

  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. Automating the Layout of Network Diagrams with Specified Visual Organization

    E-print Network

    Shieber, Stuart

    Automating the Layout of Network Diagrams with Specified Visual Organization Corey Kosak, Joe Marks was previously available under the title ``New Approaches to Automating Network­Diagram Layout''. #12; #12; Automating the Layout of Network Diagrams with Specified Visual Organization Corey Kosak Joe Marks Stuart

  11. Copper Substituted Iron Telluride: A Phase Diagram

    NASA Astrophysics Data System (ADS)

    Valdivia, Patrick; SSRL Beamline 2-1 Collaboration; NIST Bt-1 Collaboration; Birgeneau Group Team

    2014-03-01

    Investigations of superconductivity in the FeCh family (Ch =S,Se,Te) have produced rich physics and notable materials challenges despite the ostensible simplicity of thE system. We have studied the effects of copper substitution in iron-telluride. We map out basic physical parameters of this phase diagram and invesitgate structure-property relationships through a variety of transport and diffraction measurements.

  12. Phase diagram for magnetic nano-rings

    Microsoft Academic Search

    M. Beleggia; J. W. Lau; M. A. Schofield; Y. Zhu; S. Tandon; M. De Graef

    2006-01-01

    The minimum-energy single-domain magnetization state in a magnetized nano-ring is determined as a function of material and shape parameters. A phase diagram is derived within the framework of a Fourier-space approach for magnetic computations, showing the expected position of the ground state for any given set of external degrees of freedom. A series of micromagnetic simulations for suitably chosen parameters,

  13. The QCD phase diagram: Results and challenges

    SciTech Connect

    Pawlowski, Jan M. [Institut fuer Theoretische Physik, Universitaet Heidelberg, Philosophenweg 16, 69120 Heidelberg (Germany); ExtreMe Matter Institute EMMI, GSI, Planckstr. 1, 64291 Darmstadt (Germany)

    2011-05-23

    I review the progress made in recent years with functional methods in our understanding of the QCD phase diagram. In particular I discuss a renormalisation group approach to QCD at finite temperature and chemical potential. Results include the location of the confinement-deconfinement phase transition/cross-over and the chiral phase transition/cross-over lines, their nature as well as their interrelation, and thermodynamic observables.

  14. 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).

  15. CONSTITUTION DIAGRAM OF In-Se ALLOYS

    Microsoft Academic Search

    G. K. Slavnova; N. P. Luzhnaya; Z. S. Medvedeva

    1963-01-01

    Thermal and x-ray phase analysis was used in developing an In- Se ; constitution diagram. Chemical compounds InSe, InâSeâ, and Inâ; Se were prepared and analyzed. The melting points were found for InSe, 660 450 ; deg C in a 10 un. Concent 85% ; InâSeâ, 900 450 deg C in a 10 un. ; Concent 85% ; and InâSe,

  16. Fundamental Diagram and Validation of Crowd Models

    Microsoft Academic Search

    Armin Seyfried; Andreas Schadschneider

    2008-01-01

    In recent years, several approaches for crowd modeling have been proposed. However, so far not much attention has been paid\\u000a to their quantitative validation. The fundamental diagram , i.e. the density-dependence of the flow or velocity, is probably the most important\\u000a relation as it connects the basic parameter to describe the dynamic of crowds. But specifications in different handbooks as

  17. Fundamental Diagram Modelling from NGSIM Data

    Microsoft Academic Search

    X. Y. Lu; P. Varaiya; R. Horowitz; A. Skabardonis

    This paper is to investigate lane-wise flow-density (or equivalently speed-density) relationship which is generally called Fundamental Diagram (FD) over a stretch of homogeneous freeway section using the microscopic NGSIM data (Alexiadis, 2004). Particularly, it investigates how a homogenous traffic breakdown through data analysis and modeling. The breakdown of a homogenous traffic is understood as the significant flow drop and density

  18. The neodymium-gold phase diagram

    Microsoft Academic Search

    A. Saccone; D. Macciò; S. Delfino; R. Ferro

    1999-01-01

    The Nd-Au phase diagram was studied in the 0 to 100 at. pct Au composition range by differential thermal analysis (DTA), X-ray\\u000a diffraction (XRD), optical microscopy (LOM), scanning electron microscopy (SEM), and electron probe microanalysis (EPMA).\\u000a Six intermetallic phases were identified, the crystallographic structures were determined or confirmed, and the melting behavior\\u000a was determined, as follows: Nd2Au, orthorhombic oP12-Co2Si type,

  19. 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.

  20. Campbell diagrams of weakly anisotropic flexible rotors

    E-print Network

    Oleg N. Kirillov

    2009-06-09

    We consider an axi-symmetric rotor perturbed by dissipative, conservative, and non-conservative positional forces originated at the contact with the anisotropic stator. The Campbell diagram of the unperturbed system is a mesh-like structure in the frequency-speed plane with double eigenfrequencies at the nodes. The diagram is convenient for the analysis of the traveling waves in the rotating elastic continuum. Computing sensitivities of the doublets we find that at every particular node the untwisting of the mesh into the branches of complex eigenvalues in the first approximation is generically determined by only four 2x2 sub-blocks of the perturbing matrix. Selection of the unstable modes that cause self-excited vibrations in the subcritical speed range, is governed by the exceptional points at the corners of the singular eigenvalue surfaces--`double coffee filter' and `viaduct'--which are associated with the crossings of the unperturbed Campbell diagram with the definite Krein signature. The singularities connect the problems of wave propagation in the rotating continua with that of electromagnetic and acoustic wave propagation in non-rotating anisotropic chiral media. As mechanical examples a model of a rotating shaft with two degrees of freedom and a continuous model of a rotating circular string passing through the eyelet are studied in detail.

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

    SciTech Connect

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

    1994-10-01

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

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

    E-print Network

    Farritor, Shane

    Page 1/2 Date of Accident: _____/_____/________ Day of Week: __________________ Hour" and THIS REPORT IS NOT a substitute for Worker's Compensation Court's required "First Report of Alleged Accident: Address: Date of this Report Prepared by (Print Name) Signature INJURED 1. Name: Nature of Injury

  3. Drudgery, accidents and injuries in Indian agriculture.

    PubMed

    Nag, Pranab Kumar; Nag, Anjali

    2004-04-01

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

  4. Intuitive Mapping of UML 2 Activity Diagrams into Fundamental Modeling Concept Petri Net Diagrams and Colored Petri Nets

    Microsoft Academic Search

    Tony Spiteri Staines

    2008-01-01

    This paper describes how UML 2 Activity diagrams can be intuitively translated into Petri net notations. The UML2 specification states that activities are based on Petri net semantics. The transformation of UML 2 Activity diagrams into Petri net semantics have been researched for various reasons. Translating UML activities into Petri nets creates new problems. The Petri net diagrams are (i)

  5. Symmetry factors of Feynman diagrams for scalar fields

    NASA Astrophysics Data System (ADS)

    Dong, P. V.; Hue, L. T.; Hung, H. T.; Long, H. N.; Thao, N. H.

    2010-11-01

    We calculate the symmetry factors of diagrams for real and complex scalar fields in general form using an analysis of the Wick expansion for Green's functions. We separate two classes of symmetry factors: factors corresponding to connected diagrams and factors corresponding to vacuum diagrams. The symmetry factors of vacuum diagrams play an important role in constructing the effective action and phase transitions in cosmology. In the complex scalar field theory, diagrams with different topologies can contribute the same, and the inverse symmetry factor for the total contribution is therefore the sum of the inverse symmetry factors.

  6. Lifestyle and accidents among young drivers.

    PubMed

    Gregersen, N P; Berg, H Y

    1994-06-01

    This study covers the lifestyle component of the problems related to young drivers' accident risk. The purpose of the study is to measure the relationship between lifestyle and accident risk, and to identify specific high-risk and low-risk groups. Lifestyle is measured through a questionnaire, where 20-year-olds describe themselves and how often they deal with a large number of different activities, like sports, music, movies, reading, cars and driving, political engagement, etc. They also report their involvement in traffic accidents. With a principal component analysis followed by a cluster analysis, lifestyle profiles are defined. These profiles are finally correlated to accidents, which makes it possible to define high-risk and low-risk groups. The cluster analysis defined 15 clusters including four high-risk groups with an average overrisk of 150% and two low-risk groups with an average underrisk of 75%. The results are discussed from two perspectives. The first is the importance of theoretical understanding of the contribution of lifestyle factors to young drivers' high accident risk. The second is how the findings could be used in practical road safety measures, like education, campaigns, etc. PMID:8011042

  7. 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.

  8. 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.

  9. 76 FR 2919 - Outer Continental Shelf Official Protraction Diagram and Supplemental Official Outer Continental...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-18

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

  10. 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.

  11. 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.

  12. 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

  13. Enhanced Accident Tolerant LWR Fuels: Metrics Development

    SciTech Connect

    Shannon Bragg-Sitton; Lori Braase; Rose Montgomery; Chris Stanek; Robert Montgomery; Lance Snead; Larry Ott; Mike Billone

    2013-09-01

    The Department of Energy (DOE) Fuel Cycle Research and Development (FCRD) Advanced Fuels Campaign (AFC) is conducting research and development on enhanced Accident Tolerant Fuels (ATF) for light water reactors (LWRs). This mission emphasizes the development of novel fuel and cladding concepts to replace the current zirconium alloy-uranium dioxide (UO2) fuel system. The overall mission of the ATF research is to develop advanced fuels/cladding with improved performance, reliability and safety characteristics during normal operations and accident conditions, while minimizing waste generation. The initial effort will focus on implementation in operating reactors or reactors with design certifications. To initiate the development of quantitative metrics for ATR, a LWR Enhanced Accident Tolerant Fuels Metrics Development Workshop was held in October 2012 in Germantown, MD. This paper summarizes the outcome of that workshop and the current status of metrics development for LWR ATF.

  14. 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.

  15. [Traffic accidents--the national killer].

    PubMed

    Shemer, Joshua

    2004-02-01

    Traffic accidents are the most prevalent cause of death in developed countries between the ages of 1-33 years. In spite of a low motorization level in Israel, the rate of injury per 100,000 residents in Israel (2.8) was higher than in the US (1.8), NZ (1.7), Canada (1.7), Japan (1.3) and most European countries. The worst injuries were among pedestrians; particularly children aged 1-9 years and elderly (70+ years). In the past decade there have been significant advances in trauma care in Israel. Major strides included the foundation of trauma centers in hospitals, the establishment of the National Council for Trauma and the National Center for Trauma and Emergency Medicine Research at the Gertner Institute that coordinates the national trauma registry. One of the primary aims of the registry was to provide data to support decision-makers in setting national policy for accident prevention. The Israeli Police Department provides data on traffic accident victims to the Israeli Central Bureau of Statistics (CBS) which publishes the national figures. In their article in this edition of the journal, Dr Peleg and Dr. Aharonson-Daniel present a grave concern regarding the fact that details of over 50% of hospitalized traffic accident victims were not reported to the CBS by the police, including data on the severely injured casualties. Traffic accidents are a major cause of loss of life and disability, creating a heavy economic burden on the state and the health care system. Hence, the authors recommend establishing a national database which will combine data from medical and other sources and present the complete comprehensive picture of traffic accident injuries. Such a database will improve the decision-making process, providing more focused data to enhance the preparation and dissemination of appropriate injury prevention policies. PMID:15143693

  16. French policy for managing the post-accident phase of a nuclear accident.

    PubMed

    Gallay, F; Godet, J L; Niel, J C

    2015-06-01

    In 2005, at the request of the French Government, the Nuclear Safety Authority (ASN) established a Steering Committee for the Management of the Post-Accident Phase of a Nuclear Accident or a Radiological Emergency, with the objective of establishing a policy framework. Under the supervision of ASN, this Committee, involving several tens of experts from different backgrounds (e.g. relevant ministerial offices, expert agencies, local information commissions around nuclear installations, non-governmental organisations, elected officials, licensees, and international experts), developed a number of recommendations over a 7-year period. First published in November 2012, these recommendations cover the immediate post-emergency situation, and the transition and longer-term periods of the post-accident phase in the case of medium-scale nuclear accidents causing short-term radioactive release (less than 24?h) that might occur at French nuclear facilities. They also apply to actions to be undertaken in the event of accidents during the transportation of radioactive materials. These recommendations are an important first step in preparation for the management of a post-accident situation in France in the case of a nuclear accident. PMID:25915552

  17. 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

  18. 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.

  19. Venn Diagrams Set Operations (Union, Intersection, .... )

    E-print Network

    Gupta, Himanshu

    | m = 2a for some integer a} B = {n Z | n = 2b - 2 for some integer b} 8 #12;Venn Diagrams A B A B 9 is also an element of Y. 5 #12;Subset: Proof Example A = {m Z|m = 6r + 12 for some r Z} B = {n Z | n = 3s;Subset: Disproof Example Prove B A. A = {m Z|m = 6r + 12 for some r Z} B = {n Z | n = 3s for some s Z

  20. 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.

  1. [Medical protection during radiation accidents: some results and lessons of the Chernobyl accident].

    PubMed

    Legeza, V I; Grebeniuk, A N; Zatsepin, V V

    2011-01-01

    Actions of medical radiation protection of liquidators of consequences of on Chernobyl atomic power station accident are analysed. It is shown, that during the early period of the accident medical protection of liquidators was provided by administration of radioprotectors, means of prophylaxis: of radioactive iodine incorporation and agent for preventing psychological and emotional stress. When carrying out decontamination and regenerative works, preparations which action is caused by increase of nonspecific resistance of an organism were applied. The lessons taken from the results of the Chernobyl accident, have allowed one to improve the system of medical protection and to introduce in practice new highly effective radioprotective agents. PMID:21520618

  2. 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

  3. 10 CFR 835.1304 - Nuclear accident dosimetry.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    (a) Installations possessing sufficient quantities of fissile material to potentially constitute a critical mass, such that the excessive exposure of individuals to radiation from a nuclear accident is possible, shall provide nuclear accident dosimetry for those...

  4. Remote control continuous mining machine crushing accident data study

    SciTech Connect

    NONE

    2006-05-11

    A committee was formed to identify norms and trends in remote control continuous miner crushing accidents as part of US MSHA's efforts to reduce and eliminate these types of accidents. The committee was tasked with collecting, reviewing, and evaluating remote control accident data to identify significant factors that could possibly contribute to remote control accidents. The report identifies that these types of accidents commonly happen to experienced miners during routine mining activities, with the majority occurring while moving the miner from one face to another (place changing). Another common aspect of the accidents is that many of the victims are newly employed at the mine where the accident occurred. Training all employees to stay outside the turning radius of an energized remote control continuous miner, establishing this as a safe operating procedure, and consistently enforcing this practice among miners will reduce these types of accidents. 10 figs., 5 tabs., 7 apps.

  5. 49 CFR 233.5 - Accidents resulting from signal failure.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Accidents resulting from signal failure. 233.5 Section 233...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION SIGNAL SYSTEMS REPORTING REQUIREMENTS § 233.5 Accidents resulting from signal failure. Each carrier...

  6. 49 CFR 233.5 - Accidents resulting from signal failure.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 false Accidents resulting from signal failure. 233.5 Section 233...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION SIGNAL SYSTEMS REPORTING REQUIREMENTS § 233.5 Accidents resulting from signal failure. Each carrier...

  7. 49 CFR 233.5 - Accidents resulting from signal failure.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 false Accidents resulting from signal failure. 233.5 Section 233...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION SIGNAL SYSTEMS REPORTING REQUIREMENTS § 233.5 Accidents resulting from signal failure. Each carrier...

  8. 49 CFR 233.5 - Accidents resulting from signal failure.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 false Accidents resulting from signal failure. 233.5 Section 233...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION SIGNAL SYSTEMS REPORTING REQUIREMENTS § 233.5 Accidents resulting from signal failure. Each carrier...

  9. 49 CFR 233.5 - Accidents resulting from signal failure.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 false Accidents resulting from signal failure. 233.5 Section 233...ADMINISTRATION, DEPARTMENT OF TRANSPORTATION SIGNAL SYSTEMS REPORTING REQUIREMENTS § 233.5 Accidents resulting from signal failure. Each carrier...

  10. 32 CFR 634.29 - Traffic accident investigation reports.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... (iii) The accident involves only minor damage to the POV and...to any criminal traffic statements provided...following about the accident: (i) Location... (v) Property damage involved. ...visibility, road surface...

  11. 32 CFR 634.29 - Traffic accident investigation reports.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... (iii) The accident involves only minor damage to the POV and...to any criminal traffic statements provided...following about the accident: (i) Location... (v) Property damage involved. ...visibility, road surface...

  12. 32 CFR 634.29 - Traffic accident investigation reports.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... (iii) The accident involves only minor damage to the POV and...to any criminal traffic statements provided...following about the accident: (i) Location... (v) Property damage involved. ...visibility, road surface...

  13. 10 CFR 76.85 - Assessment of accidents.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...accidents. 76.85 Section 76.85 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) CERTIFICATION OF GASEOUS DIFFUSION PLANTS Safety § 76.85 Assessment of accidents. The Corporation shall perform an analysis of potential...

  14. 10 CFR 76.85 - Assessment of accidents.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...accidents. 76.85 Section 76.85 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) CERTIFICATION OF GASEOUS DIFFUSION PLANTS Safety § 76.85 Assessment of accidents. The Corporation shall perform an analysis of potential...

  15. 10 CFR 76.85 - Assessment of accidents.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...accidents. 76.85 Section 76.85 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) CERTIFICATION OF GASEOUS DIFFUSION PLANTS Safety § 76.85 Assessment of accidents. The Corporation shall perform an analysis of potential...

  16. 10 CFR 76.85 - Assessment of accidents.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...accidents. 76.85 Section 76.85 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) CERTIFICATION OF GASEOUS DIFFUSION PLANTS Safety § 76.85 Assessment of accidents. The Corporation shall perform an analysis of potential...

  17. 10 CFR 76.85 - Assessment of accidents.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...accidents. 76.85 Section 76.85 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) CERTIFICATION OF GASEOUS DIFFUSION PLANTS Safety § 76.85 Assessment of accidents. The Corporation shall perform an analysis of potential...

  18. 49 CFR 382.303 - Post-accident testing.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Post-accident testing. 382.303 Section 382.303 Transportation...CONTROLLED SUBSTANCES AND ALCOHOL USE AND TESTING Tests Required § 382.303 Post-accident testing. (a) As soon as practicable...

  19. 49 CFR 655.34 - Use following an accident.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 false Use following an accident. 655.34 Section 655.34 Transportation Other Regulations Relating to...USE IN TRANSIT OPERATIONS Prohibited Alcohol Use § 655.34 Use following an accident. Each...

  20. 49 CFR 655.34 - Use following an accident.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 false Use following an accident. 655.34 Section 655.34 Transportation Other Regulations Relating to...USE IN TRANSIT OPERATIONS Prohibited Alcohol Use § 655.34 Use following an accident. Each...

  1. 49 CFR 655.34 - Use following an accident.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Use following an accident. 655.34 Section 655.34 Transportation Other Regulations Relating to...USE IN TRANSIT OPERATIONS Prohibited Alcohol Use § 655.34 Use following an accident. Each...

  2. PNNL Results from 2009 Silene Criticality Accident Dosimeter Intercomparison Exercise

    SciTech Connect

    Hill, Robin L.; Conrady, Matthew M.

    2010-06-30

    This document reports the results of testing of the Hanford Personnel Nuclear Accident Dosimeter (PNAD) during a criticality accident dosimeter intercomparison exercise at the CEA Valduc Center on October 13, 14, and 15, 2009.

  3. The Role of Software in Spacecraft Accidents Nancy G. Leveson

    E-print Network

    Leveson, Nancy

    , unnecessary complexity and software functionality, software reuse without appropriate safety analysisThe Role of Software in Spacecraft Accidents Nancy G. Leveson Aeronautics and Astronautics software-related space- craft accidents were studied to determine common systemic factors. Although

  4. 32 CFR 634.28 - Traffic accident investigation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...2010-07-01 2010-07-01 true Traffic accident investigation. 634.28 Section 634...INVESTIGATIONS MOTOR VEHICLE TRAFFIC SUPERVISION Traffic Supervision § 634.28 Traffic accident investigation. Installation law...

  5. 32 CFR 634.28 - Traffic accident investigation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Traffic accident investigation. 634.28 Section 634...INVESTIGATIONS MOTOR VEHICLE TRAFFIC SUPERVISION Traffic Supervision § 634.28 Traffic accident investigation. Installation law...

  6. 32 CFR 636.12 - Traffic accident investigation.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ...2011-07-01 2011-07-01 false Traffic accident investigation. 636.12 ...INVESTIGATIONS MOTOR VEHICLE TRAFFIC SUPERVISION (SPECIFIC INSTALLATIONS...Stewart, Georgia § 636.12 Traffic accident investigation. In...

  7. 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.

  8. Quantization of the algebra of chord diagrams

    NASA Astrophysics Data System (ADS)

    Ellegaard Andersen, Jørgen; Mattes, Josef; Reshetikhin, Nicolai

    1998-11-01

    In this paper we study the algebra L([sum L: summation operator]) generated by links in the manifold [sum L: summation operator]×[0, 1] where [sum L: summation operator] is an oriented surface. This algebra has a filtration and the associated graded algebra LGr([sum L: summation operator]) is naturally a Poisson algebra. There is a Poisson algebra homomorphism from the algebra ch ([sum L: summation operator]) of chord diagrams on [sum L: summation operator] to LGr([sum L: summation operator]).We show that multiplication in L([sum L: summation operator]) provides a geometric way to define a deformation quantization of the algebra of chord diagrams on [sum L: summation operator], provided there is a universal Vassiliev invariant for links in [sum L: summation operator]×[0, 1]. If [sum L: summation operator] is compact with free fundamental group we construct a universal Vassiliev invariant. The quantization descends to a quantization of the moduli space of flat connections on [sum L: summation operator] and it is natural with respect to group homomorphisms.

  9. Parallel Algorithms to Find the Voronoi Diagram and the Order-k Voronoi Diagram

    Microsoft Academic Search

    Christian Trefftz; Joseph S. Szakas

    2003-01-01

    The Voronoi diagram is a classical problem in the area of computational geometry. Given a plane and a set of n seed points, the objective is to divide the plane into tiles (or subsets of points), such that the set of points in a tile are closer to a particular seed point than to any other seed. This problem has

  10. Multiple-vehicle traffic accidents in Hong Kong

    Microsoft Academic Search

    Kelvin K. W. Yau; H. P. Lo; Sherrice H. H. Fung

    2006-01-01

    ‘Multiple-vehicle traffic accident’ refers to a crash between two or more moving objects. Unlike single-vehicle accidents, not all drivers involving in a multiple-vehicle accident are responsible for the occurrence of the event. Accordingly, variables such as road type, speed limit and number of vehicles involved in the accident are expected to play a much more important role in association with

  11. An Ontology-Based Traffic Accident Risk Mapping Framework

    Microsoft Academic Search

    Jing Wang; Xin Wang

    \\u000a Road traffic accidents are a social and public challenge. Various spatial concentration detection methods have been proposed\\u000a to discover the concentration patterns of traffic accidents. However, current methods treat each traffic accident location\\u000a as a point without consideration of the severity level, and the final traffic accident risk map for the whole study area ignores\\u000a the users’ requirements. In this

  12. Investigation of 184 passenger car–pedestrian accidents

    Microsoft Academic Search

    Hui Zhao; Zhiyong Yin; Rong Chen; Huipeng Chen; Cui Song; Guangyu Yang; Zhengguo Wang

    2010-01-01

    In China, pedestrians were the most common and the most vulnerable of road users, meaning pedestrians were involved in vehicle-pedestrian accidents more frequently. Little attention has been paid to the investigation of such accidents. One surveying group was built to randomly collect vehicle-pedestrian accidents and analyse these accidents from the vehicle–pedestrian crash characteristics and the relationships between the pedestrian injury

  13. Medical intervention in a nuclear accident

    Microsoft Academic Search

    Rabin

    1986-01-01

    The medical care given to a victim of a radiation accident is one aspect of a larger emergency response that involves the establishment of control of the radiation source, prevention of secondary contamination of all persons having contact with the injured, organization of a general evacuation, and panic control. We have discussed the basic knowledge required to render medical care

  14. The Chernobyl accident: Causes and consequences

    SciTech Connect

    Malinauskas, A.P.

    1987-01-01

    Two explosions, one immediately following the other, in Unit 4 of the Chernobyl nuclear power station in the Soviet Union signaled the worst disaster ever to befall the commercial nuclear power production industry. This accident, which occurred at 1:24 a.m. on April 26, 1986, resulted from an almost incredible series of operational errors associated, ironically, with an attempt to enhance the capability of the reactor to safely accommodate station blackout accidents (i.e., accidents arising from a loss of station electrical power). Disruption of the core, due to a prompt criticality excursion, resulted in the destruction of the core vault and reactor building and the sudden dispersal of about 3% of the fuel from the core region into the environment. Lesser but significant releases of radioactivity continued through May 6, 1986, before attempts to certain the radioactivity and cool the remnants of the core were successful. The amount and composition of material released in the course of the accident remain somewhat uncertain, and inconsistencies in the release estimates are evident. The Soviet estimates, in addition to the dispersal of about 3% of the fuel, include complete release of the noble gas core inventory, 20% of the fission product iodine inventory, 15% of the tellurium inventory, and 10 to 13% of the fission product cesium inventory. The iodine and cesium release estimates are not consistent with the noble gas values, and are as much as a factor of two less than some estimates made by experts outside the Soviet Union.

  15. The accident site portable integrated video system

    SciTech Connect

    Jones, D.P.; Shirey, D.L.; Amai, W.A.

    1995-12-31

    This paper presents a high bandwidth fiber-optic communication system intended for post accident recovery of weapons. The system provides bi-directional multichannel, and multi-media communications. Two smaller systems that were developed as direct spin-offs of the larger system are also briefly discussed.

  16. The Fukushima Accident Peter Bernard Ladkin

    E-print Network

    Ladkin, Peter B.

    The Fukushima Accident Peter Bernard Ladkin University of Bielefeld CITEC and Causalis Limited evidence to think that the earthquake itself caused some damage to critical systems at the Fukushima Daiichi ("Fukushima Number One") nuclear plant, located at the edge of the ocean in Fukushima province

  17. Three Mile Island accident technical support

    Microsoft Academic Search

    R. L. Long; T. M. Crimmins; W. W. Lowe

    1981-01-01

    A large number of technical support personnel were required to respond to the Three Mile Island Unit 2 (TMI-2) accident of March 28, 1979. Under the leadership of General Public Utilities personnel, onsite (round-the-clock shift) technical support began the evening of March 29 and within a week the TMI Recovery Organization incorporated all of the essential technical capability to implement

  18. An Investigation of the Therac-25 Accidents

    Microsoft Academic Search

    Nancy Leveson; Clark S. Turner

    1992-01-01

    With information for this article taken from publicly available documents, we present a detailed accident investigation of the factors involved in the overdoses and the attempts by the users, manufacturers, and the US and Canadian governments to deal with them. Our goal is to help others learn from this experience, not to criticize the equipment's manufacturer or anyone else. The

  19. Psychological morbidity associated with motor vehicle accidents.

    PubMed

    Blanchard, E B; Hickling, E J; Taylor, A E; Loos, W R; Gerardi, R J

    1994-03-01

    Fifty victims of recent motor vehicle accidents (MVAs), who had sought medical attention after their accidents, were assessed for possible psychological morbidity as a result of the accident. Forty age, gender-matched controls were also assessed with the same instruments. Forty-six percent of the MVA victims met the criteria for current post-traumatic stress disorders (PTSD) as a result of the accident while 20% showed a sub-syndromal version (the reexperiencing symptom cluster plus either the avoidance/numbing cluster or the over-arousal cluster) of PTSD. Although all MVA victims showed some form of driving reluctance, only 1 S met the criteria for driving phobia. Those MVA victims who met the criteria for PTSD or sub-syndromal PTSD were significantly more likely to have experienced previous trauma, other than a serious MVA, and were more likely (P = 0.008) to have previously met the criteria for PTSD as a result of that trauma. Forty-eight percent of MVA victims who met the criteria for current PTSD also met the criteria for current major depression. Significantly more current MVA-PTSDs had suffered previous major depressive episodes. PMID:8192626

  20. Orofacial damage resulting from road accidents.

    PubMed

    Caldas, Inês Morais; Magalhães, Teresa; Afonso, Américo; Matos, Eduarda

    2008-08-01

    The objective of this paper was to study the epidemiological characteristics of orofacial damage resulting from road accidents among victims assessed in the Oporto delegation of the Legal Medicine Institute, in Portugal. It was also our goal to analyze in which way orofacial sequelae was reflected in the victims' complete social reintegration. PMID:18721339

  1. A serious game for traffic accident investigators

    E-print Network

    Romano, Daniela

    to enhance the performances of the police officers to address some of the problems identifiedA serious game for traffic accident investigators 1. INTRODUCTION All new police officers recruited with the current training process in Dubai Police (BinSubaih et al, 2005a). The general problem with training

  2. Human body modelling for traffic accident analysis

    Microsoft Academic Search

    S. Krašna; I. Prebil; M. Hribernik

    2007-01-01

    A traffic accident is a complex phenomenon with vehicles and human beings involved. During a collision, the vehicle occupant is exposed to substantial loads, which can cause the occupant injuries that depend on the level of passive safety, as well as on the occupant's individual characteristics. Correct estimation of injury severity demands a validated human body model and known impact

  3. Speed Variance and Its Influence on Accidents.

    ERIC Educational Resources Information Center

    Garber, Nicholas J.; Gadirau, Ravi

    A study was conducted to investigate the traffic engineering factors that influence speed variance and to determine to what extent speed variance affects accident rates. Detailed analyses were carried out to relate speed variance with posted speed limit, design speeds, and other traffic variables. The major factor identified was the difference…

  4. Cervical spine injuries from motor vehicle accidents

    Microsoft Academic Search

    N. Yoganandan; D. J. Maiman; F. A. Pintar

    1989-01-01

    The objective of the study was to delineate the critical regions of the human cervical spine and determine the mechanisms of injury in motor vehicle accidents (MVA). The clinical data were gathered from patient records. Results indicated that while neck injuries in MVA are complex and can occur at any level of the cervical spine, the craniocervical junction (among fatalities)

  5. Agricultural Accident Prevention--Problems and Accomplishments

    ERIC Educational Resources Information Center

    Bristol, Benton K.

    1976-01-01

    Titles of bulletins, for persons who are interested in agricultural accident prevention, are listed as well as examples of farm machinery manufacturers who are making special efforts to produce valuable teaching aids and to inform all segments of agriculture about important safety development. (HD)

  6. The Accident at Three Mile Island

    Microsoft Academic Search

    JOHN G. COLLIER; L. MYRDDIN DAVIES

    1980-01-01

    On March 28, 1979, what has been called the worst accident in the history of commercial nuclear power generation occurred at the Three Mile Island no. 2 reactor unit in Pennsylvania. The sequence of events that occurred during the first 16 h of the incident are described. There was extensive damage to the core of the reactor as well as

  7. Warning: accident at Three Mile Island

    Microsoft Academic Search

    M. Gray; I. Rosen

    1982-01-01

    A reporter and an engineer reconstruct the events leading up to and following the March, 1979 accident at the Three Mile Island Reactor Number Two. They begin with the compromises and work pace required in designing, siting, and building a nuclear reactor and the warnings from incidents involving other reactors. The authors give a chronological report of the events and

  8. Knowledge Management Aspect of JCO Nuclear Accident

    Microsoft Academic Search

    Shigehisa Tsuchiya; T. Narushima; M. Inanobe

    Except for what are sometimes called 'Act of God', any problems arising at a nuclear plant originate in some way in human error (INSAG, 1991). The IAEA Report also concluded that the nuclear criticality accident at the JCO nuclear fuel processing facility at Tokaimura seemed to have resulted primarily from human error and serious breaches of safety principles. However, unless

  9. Infantile Subdural Hematomas due to Traffic Accidents

    Microsoft Academic Search

    Matthieu Vinchon; Odile Noizet; Sabine Defoort-Dhellemmes; Gustavo Soto-Ares; Patrick Dhellemmes

    2002-01-01

    The most common cause of subdural hematomas (SDH) in infants is shaken-baby syndrome (SBS). The pathogenesis and natural history of infantile SDH (ISDH) are poorly documented, because in SBS, the date of shaking is usually imprecise and the assault is often repeated. Victims of traffic accidents (TA) form a study group close to experimental conditions, because the trauma is unique,

  10. Organic iodide formation following nuclear reactor accidents

    Microsoft Academic Search

    E. C. Beahm; W. E. Shockley; O. L. Culberson

    1985-01-01

    A wide variety of organic materials will be present in containment following a light-water reactor accident. Organic iodides can be produced by the reaction of fission product iodine with these organic materials. This report emphasizes the importance of free radicals and radiation in leading to the formation of organic iodide. The ultimate aim is a description of the rate of

  11. Containment venting as an accident management strategy

    Microsoft Academic Search

    R. J. Dallman; W. J. Galyean; K. C. Wagner

    1988-01-01

    The idea of primary containment venting to prevent or mitigate the consequences from a severe accident is not new. Research has been conducted on filter effectiveness for over thirty years. United States production reactors have had containment filter systems and applications to commercial facilities have been studied over the same period. In Europe, the countries with the largest nuclear power

  12. Accident Prevention: A Workers' Education Manual.

    ERIC Educational Resources Information Center

    International Labour Office, Geneva (Switzerland).

    Devoted to providing industrial workers with a greater knowledge of precautionary measures undertaken and enforced by industries for the protection of workers, this safety education manual contains 14 lessons ranging from "The Problems of Accidents during Work" to "Trade Unions and Workers and Industrial Safety." Fire protection, safety equipment…

  13. A new perspective on severe nuclear accidents

    Microsoft Academic Search

    Jaiki Lee

    2012-01-01

    The reactions of the public in Korea to the nuclear accident at the Fukushima Daiichi plants in Japan, particularly over-reactions, are reviewed, with the conclusion that significant radioactive contamination of a small country could lead to a severe national crisis. The most important factor is the socio-economic damage caused by stigma, which in turn is caused by a misunderstanding of

  14. A European Nuclear Accident Pool&ast

    Microsoft Academic Search

    Göran Skogh

    2008-01-01

    The compensation to victims of nuclear accidents is based on a Paris (OECD) and a Vienna (UN) convention. A problem with the system is that a strictly liable, but insolvent or uninsured plant owner leaves victims without compensation. In this paper, it is argued that a system could be better organised by, for example, the European Union (EU). A State

  15. Consequence calculation for relocation after nuclear accidents

    Microsoft Academic Search

    J Qu

    2001-01-01

    This paper presents the results of dose and cost calculation for relocation after nuclear accidents. In order to quantify the relationship between radiation dose and relevant parameters defining protective actions, well-designed calculations have been performed and the results analyzed. On the basis of this, some dependencies between the important parameters describing the features of relocation and decontamination have been mathematically

  16. Fukushima Daiichi Accident and Its Radiological Impact on the Environment

    ERIC Educational Resources Information Center

    Bevelacqua, J. J.

    2012-01-01

    The Fukushima Daiichi nuclear accident is a topic of current media and public interest. It provides a means to motivate students to understand the fission process and the barriers that have been designed to prevent the release of fission products to the environment following a major nuclear power reactor accident. The Fukushima Daiichi accident

  17. L'accident la centrale nuclaire de Quelques explications scientifiques

    E-print Network

    Skorobogatiy, Maksim

    L'accident à la centrale nucléaire de Fukushima Quelques explications scientifiques G. Marleau, J´eal, 18 mars 2011 L'accident `a la centrale nucl´eaire de Fukushima ­ 1/29 Accident de Fukushima 1 Contenu de Fukushima. 3. La puissance résiduelle. 4. Perte de refroidissement et conséquences. 5

  18. Traffic Accident Macro Forecast Based on ARIMAX Model

    Microsoft Academic Search

    Chunyan Li; Jun Chen

    2009-01-01

    To overcome the deficiency of traditional traffic accident estimation models, this paper introduced a new way. It gave two categories on traffic accident affected factors and selected the main ones, using stepwise regression model. ARIMAX model, a dynamic regression one, was used to forecast traffic accident volumes. The former job ensures the precision of estimation, while the latter one owns

  19. Analysis of Reactivity Induced Accidents for HTR-10

    Microsoft Academic Search

    KOSE Serhat; KILIC Ihsan

    Initiating events for accidents has been classified into five groups for HTR-10, by Chinese Authorities. The fourth group (Class IV) events are considered as Design Basis Accident (DBA) cases regarding their consequences. There are three types of initiating events in Class-IV, resulting in reactivity accidents: \\

  20. Forecasting for the freeway traffic accidents base on Markov model

    Microsoft Academic Search

    Yan Lin; Yan Chen; Guoshun Lin; Jun Zhai

    2011-01-01

    Frequent fatal accidents occur on Chinese freeways, and the damage increases in recent years. A challenge to freeway administration is how to accurately forecast the damage caused by accidents in coming period. Factors that will cause fatal accidents are complex, and some of them can not be made clear. In this paper, we use the Markov Chain model, by which

  1. Digital close range photogrammetry in motor vehicle accident reconstruction

    Microsoft Academic Search

    Fiona Coyle

    2008-01-01

    Road traffic accidents are consistently in the top ten causes of death world-wide. In order to reduce the number of fatalities caused by traffic collision, better knowledge and understanding of the sequence of events prior to and during a traffic accident, i.e. Accident Reconstruction, is required, so it is important to obtain detailed quantitative information about the damage sustained by

  2. Virtual Laboratory Accidents Designed to Increase Safety Awareness

    Microsoft Academic Search

    John T. Bell; H. Scott Fogler

    1999-01-01

    Summary Safety rules are often disregarded in undergraduate laboratories, due to either forgetfulness or complacency. People remember experiencing (ÊnearÊ) accidents much longer and more vividly than written rules; however it is unacceptable to deliberately cause accidents just to emphasize the importance of safe lab practices. It is therefore proposed to develop a series of virtual reality based laboratory accidents, that

  3. 49 CFR 655.44 - Post-accident testing.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 2010-10-01 false Post-accident testing. 655.44 Section 655.44 Transportation...PROHIBITED DRUG USE IN TRANSIT OPERATIONS Types of Testing § 655.44 Post-accident testing. (a) Accidents. (1) Fatal...

  4. URBAN ROAD ACCIDENTS IN DHAKA, BANGLADESH Dr. Ishtiaque Ahmed

    E-print Network

    Crawford, Ian

    of accidents, low quality of public transport service, lack of comfort and safety for pedestrians and growing a total of 1,481 numbers of pedestrian fatal accidents with 1,562 pedestrian fatal casualties. The primary are increasing. Most traffic accidents: cause fatality (69%) and hit a pedestrian (60%). Fifty four percept

  5. A STAMP ANALYSIS OF THE LEX COMAIR 5191 ACCIDENT

    E-print Network

    Leveson, Nancy

    A STAMP ANALYSIS OF THE LEX COMAIR 5191 ACCIDENT Thesis submitted in partial fulfilment;A STAMP ANALYSIS OF THE LEX COMAIR 5191 ACCIDENT Paul S. Nelson 2 #12;Acknowledgements I want--Theoretic Accident Modeling and Processes (STAMP). It incorporates three basic components: constraints, hierarchical

  6. The Three Mile Island accident: Diagnosis and prognosis

    Microsoft Academic Search

    L. M. Toth; A. P. Malinauskas; G. R. Eidam; H. M. Burton

    1986-01-01

    This book is the story of the TMI accident told by those who were there; the scientists and engineers at the utility operating the reactor and at the national laboratories that analyzed the accident. The first section describes the accident; the second focuses on the chemical aspects involved; and the third examines the strategy and progress made toward recovery. The

  7. The Chernobyl Accident: 25 Years of Cancer Research

    Cancer.gov

    On April 26, 1986 an accident occurred at the Chernobyl nuclear power plant in northern Ukraine. In addition to 28 near-term deaths due to radiation, the accident resulted in the exposure of 5 million people in Belarus, Russia and Ukraine to fallout from the accident, principally radioiodines.

  8. Occupational Mental Health, Labor Accidents and Occupational Diseases

    ERIC Educational Resources Information Center

    Naveillan, F. Pedro

    1973-01-01

    The article discusses the relationship between mental health and labor accidents as it pertains to accident prevention, treatment of accident victims, and their rehabilitation. It also comments briefly on mental health and occupational diseases and the scope of the field of occupational mental health from a Chilean perspective. (AG)

  9. Personal nuclear accident dosimetry at Sandia National Laboratories

    Microsoft Academic Search

    D. C. Ward; A. H. Mohagheghi; R. Burrows

    1996-01-01

    DOE installations possessing sufficient quantities of fissile material to potentially constitute a critical mass, such that the excessive exposure of personnel to radiation from a nuclear accident is possible, are required to provide nuclear accident dosimetry services. This document describes the personal nuclear accident dosimeter (PNAD) used by SNL and prescribes methodologies to initially screen, and to process PNAD results.

  10. The development and evaluation of accident predictive models

    Microsoft Academic Search

    T. L. Maleck

    1980-01-01

    A mathematical model that will predict the incremental change in the dependent variables (accident types) resulting from changes in the independent variables is developed. The end product is a tool for estimating the expected number and type of accidents for a given highway segment. The data segments (accidents) are separated in exclusive groups via a branching process and variance is

  11. UoS Motor Accident Report Form COMPANY DETAILS

    E-print Network

    Sussex, University of

    UNIV01FL02 UoS Motor Accident Report Form COMPANY DETAILS INSURED: University of Sussex ADDRESS: Sussex House, Falmer, Sussex BN1 9RH INCIDENT DETAILS INCIDENT DATE: TIME: INCIDENT TYPE: SPEED OF TRAVEL: LOCATION: DESCRIPTION OF HOW ACCIDENT HAPPENED: PLEASE DRAW A SKETCH OF THE ACCIDENT: #12;DRIVER DETAILS

  12. Calculation notes that support accident scenario and consequence development for the steam intrusion from interfacing systems accident

    SciTech Connect

    Ryan, G.W., Westinghouse Hanford

    1996-07-25

    This document supports the development and presentation of the following accident scenario in the TWRS Final Safety Analysis Report: Steam Intrusion from Interfacing Systems. The calculations needed to quantify the risk associated with this accident scenario are included within.

  13. Predictions of structural integrity of steam generator tubes under normal operating, accident, and severe accident conditions

    Microsoft Academic Search

    Majumdar

    1996-01-01

    Available models for predicting failure of flawed and unflawed steam generator tubes under normal operating, accident, and severe accident conditions are reviewed. Tests conducted in the past, though limited, tended to show that the earlier flow-stress model for part-through-wall axial cracks overestimated the damaging influence of deep cracks. This observation is confirmed by further tests at high temperatures as well

  14. The temporal effect of traffic violations and accidents on accident occurrence 

    E-print Network

    McKemie, Martha Susan

    1979-01-01

    TEXAS ACCIDENT INVOLVEMENT BY DRIVER AGE 1978 TEXAS ACCIDENT INVOLVEMENT BY DRIVER AGE OVERALL MEAN TIME BETWEEN EVENTS PROBABILITIES FOR VIOLATIONS TO A-1 BASED ON AN EXPONENTIAL DISTRIBUTION 28 29 32 38 10 12 13 PROBABILITIES OF 3-MONTH... assumption. Problems With Using Driver Records Many researchers, on the other hand, do not consider this rela- tionship a strong one (Coppin, McBride, Peck, 1967; Burg, 1967), A number of disadvantages limit the effectiveness of these driving indicators...

  15. Containment venting as an accident management strategy

    SciTech Connect

    Dallman, R.J.; Galyean, W.J.; Wagner, K.C.

    1988-01-01

    The idea of primary containment venting to prevent or mitigate the consequences from a severe accident is not new. Research has been conducted on filter effectiveness for over thirty years. United States production reactors have had containment filter systems and applications to commercial facilities have been studied over the same period. In Europe, the countries with the largest nuclear power production (France, Germany, and Sweden) all have filtered containment venting systems installed or planned on their nuclear power plants (NPPs). Boiling water reactors (BWRs) in the United States are operated based in part on Emergency Procedure Guidelines (EPGs) which call for wetwell and drywell venting under some circumstances. With increased interest in the management of severe accidents, containment venting as an accident management strategy has experienced new interest, and more detailed evaluations are being performed. Areas being investigated include the capability to reduce hydrogen concentrations, the effect on other systems or proposed modifications, the cost-effectiveness of venting, and its net risk benefit. One of the most comprehensive studies of containment venting was performed on the Peach Bottom Atomic Power Station, a BWR with a Mark I containment. A main conclusion from that study was that based on the draft procedures and equipment in place at the time of the analysis, containment venting had limited potential for further reducing the risk associated with accident sequences currently identified as being important to risk. In the draft Reactor Risk Reference Document, NUREG-1150, venting along with consideration of alternate injection sources was credited with lowering the core damage frequency due to accident sequences, which include a loss of long-term decay heat removal, to less than 1E-8 per reactor year. That result made these sequences insignificant compared to other risk contributors for Peach Bottom. 13 refs., 6 figs.

  16. Advantages of enthalpy-temperature diagrams for nonazeotropic refrigerant mixtures

    Microsoft Academic Search

    E. Granryd; J. C. Conklin; J. R. Sand

    1991-01-01

    The enthalpy-temperature diagram for nonazeotropic refrigerant mixtures has illustrative and useful features, combining the advantages of the entropy-temperature diagram and the enthalpy-pressure diagram commonly used in the refrigeration and heat pump industry. Plotting temperature versus enthalpy has advantages similar to those of plotting pressure versus enthalpy, and has the additional advantages of depicting the temperature profiles for both sides of

  17. On the Sn-Bi-Ag ternary phase diagram

    Microsoft Academic Search

    URSULA R. KATTNER; William J. Boettinger

    1994-01-01

    The selection and evaluation of Pb-free solders requires information that is best determined through a knowledge of ternary\\u000a and higher order phase diagrams. As part of an ongoing program on Pb-free solder phase diagrams at the National Institute\\u000a of Standards and Technology, a thermodynamic model is formulated for the Sn-Bi-Ag phase diagram. Thermodynamic functions for\\u000a the various phases obtained by

  18. A Replacement for Voronoi Diagrams of Near Linear Size

    Microsoft Academic Search

    Sariel Har-peled

    2001-01-01

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

  19. Phase diagram of AuCu-Ag pseudobinary alloy

    Microsoft Academic Search

    K. Udoh; M. Ohta; K. Oki; K. Hisatsune

    2001-01-01

    The phase diagram of the AuCu-Ag pseudobinary alloy was determined by means of transmission electron microscopy (TEM). By\\u000a tetrahedron approximation of a cluster variation method, an isothermal section was obtained theoretically to reproduce the\\u000a AuCu-Ag pseudobinary phase diagram. As a result, the Au-Cu-Ag ternary phase diagram was also determined.

  20. Arithmetic Circuit Verification Based on WordLevel Decision Diagrams

    E-print Network

    on a hierarchical methodology and uses multiplicative binary moment diagrams (*BMDs) to represent functions symbolically for verification of integer circuits. *BMDs are particularly effective for representing

  1. Arithmetic Circuit Verification Based on Word-Level Decision Diagrams

    E-print Network

    on a hierarchical methodology and uses multiplicative binary moment diagrams (*BMDs) to represent functions symbolically for verification of integer circuits. *BMDs are particularly effective for representing

  2. Computerized version of the summary of binary phase diagrams

    SciTech Connect

    Selle, J.E.

    1984-03-10

    A number of years ago, in an attempt to simplify the process of presenting Binary phase diagram information, a wall chart Summary of Binary Phase Diagrams was developed. With this wall chart, one could rapidly search through the diagrams available for a given element and select only those diagrams displaying certain features. With the advent of computers and more specifically the desk top computer, conversion of the data on the wall chart to a computerized format has become practical. This conversion has now been accomplished, and the purpose of this report is to present the data in this format, describe the method used, and try to explain some uses of this type system.

  3. 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

  4. 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

  5. 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

  6. risk_policies_accident_std_vist.doc/ac 1 Revised 07.26.13 STUDENT AND VISITOR ACCIDENT

    E-print Network

    Su, Xiao

    risk_policies_accident_std_vist.doc/ac 1 Revised 07.26.13 STUDENT AND VISITOR ACCIDENT REPORTING GUIDELINES BUDGET & RISK MANAGEMENT Finance- One Washington Square- San José, CA 95192-0008 408-924-1558/Fax: 408-924-1892 Student and Visitor Accident Reporting Guidelines These guidelines provide instructions

  7. Calculation notes that support accident scenario and consequence development for the steam intrusion from interfacing systems accident

    Microsoft Academic Search

    R. J. Van Vleet; G. W. Ryan; R. D. Crowe; S. E. Lindberg; Fluor Daniel Hanford

    1997-01-01

    This document supports the development and presentation of the following accident scenario in the TWRS Final Safety Analysis Report (FSAR): Steam Intrusion From Interfacing Systems. The calculations needed to quantify the risk associated with this accident scenario are included in the following sections to aid in the understanding of this accident scenario. Information validation forms citing assumptions that were approved

  8. 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.

  9. Perturbation Theory Without Diagrams: The Polaron Case

    E-print Network

    R. Rosenfelder

    2009-01-15

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

  10. Colloquium: Phase diagram of strongly interacting matter

    SciTech Connect

    Braun-Munzinger, P.; Wambach, J. [GSI Helmholtzzentrum fuer Schwerionenforschung mbH, Planckstasse 1, D64291 Darmstadt (Germany) and Technical University Darmstadt, Schlossgartenstrasse 9, D64287 Darmstadt (Germany)

    2009-07-15

    A fundamental question of physics is what ultimately happens to matter as it is heated or compressed. In the realm of very high temperature and density the fundamental degrees of freedom of the strong interaction, quarks and gluons, come into play and a transition from matter consisting of confined baryons and mesons to a state with ''liberated'' quarks and gluons is expected. The study of the possible phases of strongly interacting matter is at the focus of many research activities worldwide. In this paper the physical aspects of the phase diagram, its relation to the evolution of the early Universe, as well as the inner core of neutron stars are discussed. Also recent progress in the experimental study of hadronic or quark-gluon matter under extreme conditions with ultrarelativistic nucleus-nucleus collisions is summarized.

  11. 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.

  12. 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...

  13. Understanding starch gelatinization: The phase diagram approach.

    PubMed

    Carlstedt, Jonas; Wojtasz, Joanna; Fyhr, Peter; Kocherbitov, Vitaly

    2015-09-20

    By constructing a detailed phase diagram for the potato starch-water system based on data from optical microscopy, synchrotron X-ray scattering and differential scanning calorimetry, we show that gelatinization can be interpreted in analogy with a eutectic transition. The phase rule explains why the temperature of the gelatinization transition (G) is independent on water content. Furthermore, the melting (M1) endotherm observed in DSC represents a liquidus line; the temperature for this event increases with increasing starch concentration. Both the lamellar spacing and the inter-helix distance were observed to decrease with increasing starch content for starch concentrations between approximately 65wt% and 75wt%, while the inter-helix distance continued decreasing upon further dehydration. Understanding starch gelatinization has been a longstanding challenge. The novel approach presented here shows interpretation of this phenomenon from a phase equilibria perspective. PMID:26050889

  14. The Phase Diagram of Superionic Ice

    NASA Astrophysics Data System (ADS)

    Sun, Jiming; Clark, Bryan; Car, Roberto

    2014-03-01

    Using the variable cell Car-Parrinello molecular dynamics method, we study the phase diagram of superionic ice from 200GPa to 2.5TPa. We present evidence that at very high pressure the FCC structure of the oxygen sublattice may become unstable allowing for a new superionic ice phase, in which the oxygen sublattice takes the P21 structure found in zero-temperature total energy calculations. We also report on how the melting temperature of the hydrogen sublattice is affected by this new crystalline structure of the oxygen sublattice. This work was supported by the NSF under grant DMS-1065894(J.S. and R.C.) and PHY11-25915(B.C.).

  15. Bianchi I meets the Hubble diagram

    NASA Astrophysics Data System (ADS)

    Schücker, Thomas; Tilquin, André; Valent, Galliano

    2014-11-01

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

  16. Phase Diagram of Disordered Quantum XY Model

    NASA Astrophysics Data System (ADS)

    Priyadarshee, Anand; Chandrasekharan, S.; Baranger, H. U.

    2004-03-01

    We study the effect of disorder on the phase-diagram of the 2D quantum XY model. Using a directed-loop Monte Carlo algorithm, we calculate the pair susceptibility and winding susceptibility in the spin-1/2 case with a random field in the z-direction. Starting from the ordered phase at low temperature in the clean limit, increasing either T or disorder strength causes a transition to a paramagnetic state. The thermal transition is, of course, the well-known Kosterlitz-Thouless (KT) transition in which there is a close connection between the pair and winding susceptibility at the transition. At the very lowest temperatures, we see evidence for the influence of a nearby quantum critical point.

  17. 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.

  18. Analysis of surface powered haulage accidents, January 1990--July 1996

    SciTech Connect

    Fesak, G.M.; Breland, R.M.; Spadaro, J. [Dept. of Labor, Arlington, VA (United States)

    1996-12-31

    This report addresses surface haulage accidents that occurred between January 1990 and July 1996 involving haulage trucks (including over-the-road trucks), front-end-loaders, scrapers, utility trucks, water trucks, and other mobile haulage equipment. The study includes quarries, open pits and surface coal mines utilizing self-propelled mobile equipment to transport personnel, supplies, rock, overburden material, ore, mine waste, or coal for processing. A total of 4,397 accidents were considered. This report summarizes the major factors that led to the accidents and recommends accident prevention methods to reduce the frequency of these accidents.

  19. REAC/TS Radiation Accident Registry: An Overview

    SciTech Connect

    Doran M. Christensen, DO, REAC /TS Associate Director and Staff Physician Becky Murdock, REAC/TS Registry and Health Physics Technician

    2012-12-12

    Over the past four years, REAC/TS has presented a number of case reports from its Radiation Accident Registry. Victims of radiological or nuclear incidents must meet certain dose criteria for an incident to be categorized as an “accident” and be included in the registry. Although the greatest numbers of “accidents” in the United States that have been entered into the registry involve radiation devices, the greater percentage of serious accidents have involved sealed sources of one kind or another. But if one looks at the kinds of accident scenarios that have resulted in extreme consequence, i.e., death, the greater share of deaths has occurred in medical settings.

  20. Evaluation Metrics Applied to Accident Tolerant Fuels

    SciTech Connect

    Shannon M. Bragg-Sitton; Jon Carmack; Frank Goldner

    2014-10-01

    The safe, reliable, and economic operation of the nation’s nuclear power reactor fleet has always been a top priority for the United States’ nuclear industry. Continual improvement of technology, including advanced materials and nuclear fuels, remains central to the industry’s success. Decades of research combined with continual operation have produced steady advancements in technology and have yielded an extensive base of data, experience, and knowledge on light water reactor (LWR) fuel performance under both normal and accident conditions. One of the current missions of the U.S. Department of Energy’s (DOE) Office of Nuclear Energy (NE) is to develop nuclear fuels and claddings with enhanced accident tolerance for use in the current fleet of commercial LWRs or in reactor concepts with design certifications (GEN-III+). Accident tolerance became a focus within advanced LWR research upon direction from Congress following the 2011 Great East Japan Earthquake, resulting tsunami, and subsequent damage to the Fukushima Daiichi nuclear power plant complex. The overall goal of ATF development is to identify alternative fuel system technologies to further enhance the safety, competitiveness and economics of commercial nuclear power. Enhanced accident tolerant fuels would endure loss of active cooling in the reactor core for a considerably longer period of time than the current fuel system while maintaining or improving performance during normal operations. The U.S. DOE is supporting multiple teams to investigate a number of technologies that may improve fuel system response and behavior in accident conditions, with team leadership provided by DOE national laboratories, universities, and the nuclear industry. Concepts under consideration offer both evolutionary and revolutionary changes to the current nuclear fuel system. Mature concepts will be tested in the Advanced Test Reactor at Idaho National Laboratory beginning in Summer 2014 with additional concepts being readied for insertion in fiscal year 2015. This paper provides a brief summary of the proposed evaluation process that would be used to evaluate and prioritize the candidate accident tolerant fuel concepts currently under development.

  1. Multiple-vehicle traffic accidents in Hong Kong.

    PubMed

    Yau, Kelvin K W; Lo, H P; Fung, Sherrice H H

    2006-11-01

    'Multiple-vehicle traffic accident' refers to a crash between two or more moving objects. Unlike single-vehicle accidents, not all drivers involving in a multiple-vehicle accident are responsible for the occurrence of the event. Accordingly, variables such as road type, speed limit and number of vehicles involved in the accident are expected to play a much more important role in association with injury severity in multiple-vehicle accidents. To study the factors influencing injury severity of multiple-vehicle traffic accidents, a population-based study was conducted. The traffic accident data was obtained from the Traffic Accident Data System (TRADS), which was developed by the Transport Department, Police Force and Information Technology Services Department, Hong Kong. Multiple-vehicle traffic accidents (N = 10,630) occurring during the 2-year period 1999/2000 were considered. Potential risk factors such as district, human, vehicle, safety, environmental and site factors were examined. Categorizing injury severity into "fatal/serious" and "slight", a stepwise logistic regression model was applied to the population data set. The district board, time of the accident, driver's gender, vehicle type, road type, speed limit and the number of vehicles involved are significant factors influencing the injury severity. Identification of risk factors for severe traffic accidents provides valuable information to help with new and improved road safety control measures. PMID:16780781

  2. iWitness pollution map: crowdsourcing petrochemical accident research.

    PubMed

    Bera, Risha; Hrybyk, Anna

    2013-01-01

    Community members living near any one of Louisiana's 160 chemical plants or refineries have always said that accidents occurring in these petrochemical facilities significantly impact their health and safety. This article reviews the iWitness Pollution Map tool and Rapid Response Team (RRT) approach led by the Louisiana Bucket Brigade, an environmental nonprofit group, and their effectiveness in documenting these health and safety impacts during petrochemical accidents. Analysis of a January 2013 RRT deployment in Chalmette, LA, showed increased documentation of current petrochemical accidents and suggested increased preparedness to report future accidents. The RRT model encourages government response and enforcement agencies to integrate with organized community groups to fully document the impacts during ongoing accidents, lead a more timely response to the accident, and prevent future accidents from occurring. PMID:24135064

  3. Considerations in the development of severe-accident strategies

    SciTech Connect

    Lutz, R.J. Jr.; Prior, R.; Bastien, R.

    1990-06-01

    A set of proceduralized severe-accident strategies was developed for Ringhals pressurized water reactor units (beyond emergency response guidelines (BERGs)) to provide guidance in the event of an accident that progresses to core damage. The development of the ringhals severe-accident guidance was a three-phase program: Phase 1 - development of the fundamental strategy for dealing with severe accidents; Phase 2 - development of the detailed strategy for dealing with severe accidents; Phase 3 - development of the severe-accident guidance, background, and training material. In each phase of the program, many issues were identified and resolved to produce a comprehensive and complete final product. The key issues, which are described in this paper, may not be readily apparent; their identification may be useful to others undertaking the development of severe-accident strategies.

  4. 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.

  5. Severe accident approach - final report. Evaluation of design measures for severe accident prevention and consequence mitigation.

    SciTech Connect

    Tentner, A. M.; Parma, E.; Wei, T.; Wigeland, R.; Nuclear Engineering Division; SNL; INL

    2010-03-01

    An important goal of the US DOE reactor development program is to conceptualize advanced safety design features for a demonstration Sodium Fast Reactor (SFR). The treatment of severe accidents is one of the key safety issues in the design approach for advanced SFR systems. It is necessary to develop an in-depth understanding of the risk of severe accidents for the SFR so that appropriate risk management measures can be implemented early in the design process. This report presents the results of a review of the SFR features and phenomena that directly influence the sequence of events during a postulated severe accident. The report identifies the safety features used or proposed for various SFR designs in the US and worldwide for the prevention and/or mitigation of Core Disruptive Accidents (CDA). The report provides an overview of the current SFR safety approaches and the role of severe accidents. Mutual understanding of these design features and safety approaches is necessary for future collaborations between the US and its international partners as part of the GEN IV program. The report also reviews the basis for an integrated safety approach to severe accidents for the SFR that reflects the safety design knowledge gained in the US during the Advanced Liquid Metal Reactor (ALMR) and Integral Fast Reactor (IFR) programs. This approach relies on inherent reactor and plant safety performance characteristics to provide additional safety margins. The goal of this approach is to prevent development of severe accident conditions, even in the event of initiators with safety system failures previously recognized to lead directly to reactor damage.

  6. ADAM: An Accident Diagnostic,Analysis and Management System - Applications to Severe Accident Simulation and Management

    SciTech Connect

    Zavisca, M.J.; Khatib-Rahbar, M.; Esmaili, H. [Energy Research Inc., P.O. Box 2034, Rockville, MD 20847-2034 (United States); Schulz, R. [Swiss Federal Nuclear Safety Inspectorate, Villigen, 5232 (Switzerland)

    2002-07-01

    The Accident Diagnostic, Analysis and Management (ADAM) computer code has been developed as a tool for on-line applications to accident diagnostics, simulation, management and training. ADAM's severe accident simulation capabilities incorporate a balance of mechanistic, phenomenologically based models with simple parametric approaches for elements including (but not limited to) thermal hydraulics; heat transfer; fuel heatup, meltdown, and relocation; fission product release and transport; combustible gas generation and combustion; and core-concrete interaction. The overall model is defined by a relatively coarse spatial nodalization of the reactor coolant and containment systems and is advanced explicitly in time. The result is to enable much faster than real time (i.e., 100 to 1000 times faster than real time on a personal computer) applications to on-line investigations and/or accident management training. Other features of the simulation module include provision for activation of water injection, including the Engineered Safety Features, as well as other mechanisms for the assessment of accident management and recovery strategies and the evaluation of PSA success criteria. The accident diagnostics module of ADAM uses on-line access to selected plant parameters (as measured by plant sensors) to compute the thermodynamic state of the plant, and to predict various margins to safety (e.g., times to pressure vessel saturation and steam generator dryout). Rule-based logic is employed to classify the measured data as belonging to one of a number of likely scenarios based on symptoms, and a number of 'alarms' are generated to signal the state of the reactor and containment. This paper will address the features and limitations of ADAM with particular focus on accident simulation and management. (authors)

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

    Microsoft Academic Search

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

    2008-01-01

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

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

    PubMed

    de Dianous, Valérie; Fiévez, Cécile

    2006-03-31

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

  9. Characterization of a nuclear accident dosimeter

    SciTech Connect

    Burrows, R.A.

    1995-12-01

    The 23rd nuclear accident dosimetry intercomparison was held during the week of June 12--16, 1995 at Los Alamos National Laboratory. This report presents the results of this event, referred to as NAD 23, as related to the performance of Sandia 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 within +16 to +26% of the reference doses. In addition, a preliminary investigation was undertaken to determine the feasibility of using the data obtained from an irradiated PNAD to correct for body orientation. This portion of the experiment was performed with a TRIGA reactor at the Nuclear Science Center at Texas A and M University.

  10. Piercing tool, Transportation Accident Resistant Container (TARC)

    SciTech Connect

    Lari, P.

    1994-08-01

    Transportation Accident Resistant Containers (TARC)s are used for enhanced safety during movement of nuclear weapons. Its design features a tough stainless steel outer skin, redwood for impact mitigation and fire protection and a rugged aluminum inner container. Redwood absorbs impact energy by crushing, similar to the way foam crushes in other containers. Redwood also functions to insulate the weapon from heat and fire. When a TARC is involved in a fire, the redwood will slowly burn forming a good insulating char. The redwood can continue to smolder once the fire is out. To ensure the smolder is extinguished, water can be directed into any accident caused hole in the skin. If no hole exists, it may be necessary to create one. This document discusses tool selection, testing, and a simple but effective method of creating an access hole in the outer skin large enough to apply fire fighting techniques.

  11. US Department of Energy Chernobyl accident bibliography

    SciTech Connect

    Kennedy, R A; Mahaffey, J A; Carr, F Jr

    1992-04-01

    This bibliography has been prepared by Pacific Northwest Laboratory (PNL) for the US Department of Energy (DOE) Office of Health and Environmental Research to provide bibliographic information in a usable format for research studies relating to the Chernobyl nuclear accident that occurred in the Ukrainian Republic, USSR in 1986. This report is a product of the Chernobyl Database Management project. The purpose of this project is to produce and maintain an information system that is the official United States repository for information related to the accident. Two related products prepared for this project are the Chernobyl Bibliographic Search System (ChernoLit{trademark}) and the Chernobyl Radiological Measurements Information System (ChernoDat). This report supersedes the original release of Chernobyl Bibliography (Carr and Mahaffey, 1989). The original report included about 2200 references. Over 4500 references and an index of authors and editors are included in this report.

  12. Hybrid Decision Diagrams Overcoming the Limitations of MTBDDs and BMDs

    E-print Network

    Clarke, Edmund M.

    Hybrid Decision Diagrams Overcoming the Limitations of MTBDDs and BMDs E. M. Clarke M. Fujita X of arith- metic circuits. MTBDDs and BMDs have been proposed for representing this class of functions. We for hybrid decision diagrams. In practice, this is one of the main limitations of BMDs since performing arith

  13. Hybrid Decision Diagrams Overcoming the Limitations of MTBDDs and BMDs

    E-print Network

    Clarke, Edmund M.

    Hybrid Decision Diagrams Overcoming the Limitations of MTBDDs and BMDs E. M. Clarke M. Fujita X of arith­ metic circuits. MTBDDs and BMDs have been proposed for representing this class of functions. We for hybrid decision diagrams. In practice, this is one of the main limitations of BMDs since performing arith

  14. Exploring the phase diagram of QCD with complex Langevin simulations

    E-print Network

    Aarts, Gert

    diagram. phenomena: the evolution of the early universe, neutron stars and heavy-ion collision experimentsExploring the phase diagram of QCD with complex Langevin simulations Gert Aarts1, Felipe Attanasio1,2, Benjamin Jäger1, Erhard Seiler3, Dénes Sexty4,5, Ion-Olimpiu Stamatescu4. 1Department of Physics, College

  15. 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.

  16. 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.

  17. Formalize UML 2 Sequence Diagrams Department of Computer Science

    E-print Network

    Texas at San Antonio, University of

    , for the investment of constructing sequence diagrams, analysis of them remain largely limited to human inspection substantial proof to demonstrate that they perform reliably and safely. Formal analysis techniques may provide practitioners with the ability to build analysis tools. A sequence diagram describes an interaction between

  18. 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…

  19. 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

  20. PHASE DIAGRAMS OF CERTAIN TERNARY SYSTEMS OF URANIUM AND THORIUM

    Microsoft Academic Search

    O. S. Ivanov; T. A. Badajeva

    1959-01-01

    The results of investigation of alloy structures and phase diagrams of ; certain ternary systems, including uranium, thorium, and their refractory ; compounds, which are of interest in the search for materials for reactor fuel ; elements are presented. The attention was concentrated mainiy on the ; investigation of those parts of diagrams which referred to solid substance as ;

  1. How to Generate Fault Trees from Causal In uence Diagrams

    E-print Network

    Ladkin, Peter B.

    . 1 #12; Hydrocarbon in Steam in Catalyst in Vent 1 Vent 2 Product out Tank Pressure controllerHow to Generate Fault Trees from Causal In uence Diagrams Peter B. Ladkin, Bernd Sieker and Joachim how to generate fault trees algorithmically from Causal In uence Diagrams (CIDs), and report

  2. Phase diagrams of two-lane driven diffusive systems

    Microsoft Academic Search

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

    2011-01-01

    We consider a large class of two-lane driven diffusive systems in contact with reservoirs at their boundaries and develop a stability analysis of mean-field profiles as a method to derive the phase diagrams of such systems. We illustrate the method by deriving phase diagrams for the asymmetric exclusion process coupled to various second lanes: a diffusive lane, an asymmetric exclusion

  3. A Framework for Automated Diagram Assessment in Online Learning

    Microsoft Academic Search

    Sandra B. Fan; Steven L. Tanimoto

    2007-01-01

    This paper explores how to incorporate the expressiveness and learning benefits of diagrams with the computing power and scalability available in online learning. As a first step toward a framework for automated assessment of student diagrams in online learning environments, we propose a new feature for the INF ACT system's Sketch Tool. This \\

  4. 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

  5. Phase Diagrams and Band Structure of Transition Metal Compounds

    Microsoft Academic Search

    Göran Grimvall; Jan Häglund; Armando Fernández Guillermet

    1993-01-01

    Phase diagrams and phase stabilities have in the past been dealt with using different approaches. In the Calphad method one seeks a description of the Gibbs energy function G(T) which is accurate enough to be used in calculations of phase diagrams for complex alloys. Ab initio electron band structure calculations, on the other hand, have been used to predict the

  6. Visibility representation of distribution system one-line diagrams

    Microsoft Academic Search

    P. S. Nagendra Rao; Ravishankar Deekshit

    2003-01-01

    An novel method of generating one-line diagrams of radial distribution systems in the form of a visibility graph is proposed. An algorithm that automatically generates an aesthetically 'pleasing' and 'readable' visibility diagram is presented. In addition to the basic property of a visibility graph that nodes and edges be represented by axis-parallel horizontal and vertical lines, respectively, a new set

  7. Bifurcation diagram with Electromagnetic Transient Program (EMTP) for ferroresonance analysis

    Microsoft Academic Search

    Preecha Sakarung

    2010-01-01

    Bifurcation diagram presents the steady state behavior of a nonlinear system with respect to important parameters and initial conditions. The most popular method for generating bifurcation diagram is based on the simulation of ferroresonant circuit with Ordinary Differential Equation (ODE) and XPPAUT. However, this method is limited only to single phase equivalent circuit with many assumptions for simplification. The Electro-Magnetic

  8. Building comparable global change vulnerability assessments: The vulnerability scoping diagram

    Microsoft Academic Search

    Colin Polsky; Rob Neff; Brent Yarnal

    2007-01-01

    Advancing vulnerability science depends in part on identifying common themes from multiple, independent vulnerability assessments. Such insights are difficult to produce when the assessments use dissimilar, often qualitative, measures. The Vulnerability Scoping Diagram is presented to facilitate the comparison of assessments with dissimilar measures. The diagram is illustrated with recent research on drought vulnerabilities, showing that common insights into vulnerability

  9. 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…

  10. 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…

  11. Effects of causal loop diagrams on escalating commitment

    Microsoft Academic Search

    Özge Pala; Dirk Vriens; Jac Vennix

    Previous research suggests that decision makers have the tendency to keep on investing in losing courses of action. The present study focuses on de-escalation and proposes causal loop diagrams as a technique to decrease escalating commitment in a failing action. The effectiveness of causal loop diagrams is also contrasted with the effect of receiving a list of important factors. Causal

  12. 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…

  13. 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)

  14. Heuristic Diagrams as a Tool to Teach History of Science

    ERIC Educational Resources Information Center

    Chamizo, Jose A.

    2012-01-01

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

  15. ON DIAGRAM-CHASING IN DOUBLE COMPLEXES GEORGE M. BERGMAN

    E-print Network

    Bergman, George Mark

    of a certain 6-term sequence of maps between these objects (the "Salamander Lemma"). Standard results and phrases: double complex, exact sequence, diagram-chasing, Salamander Lemma, total homology, triple complex, and the Salamander Lemma We shall work in an abelian category A. In the diagrams we draw, capital letters

  16. 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…

  17. Drawing Feynman Diagrams with LaTeX and Metafont

    E-print Network

    Thorsten Ohl

    1995-05-19

    Feynmf is a LaTeX package for easy drawing of professional quality Feynman diagrams with Metafont (or Metapost). Feynmf lays out most diagrams satisfactorily from the structure of the graph without any need for manual intervention. Nevertheless all the power of Metafont (or Metapost) is available for the most complicated cases.

  18. Generation of accessible diagrams by semantics preserving adaptation

    Microsoft Academic Search

    Cagatay Goncu

    2009-01-01

    Diagrams are important components of educational materials. They can be found in various media. Printed media, such as text books, have traditionally been the most commonly used media for educational material, however online electronic resources, such as web pages and e-books, are becoming increasingly popular sources of educational content. Online materials include static diagrams, like text books, but may also

  19. Dynamic Reliability Block Diagrams VS Dynamic Fault Trees

    Microsoft Academic Search

    Salvatore Distefano; Antonio Puliafito

    2007-01-01

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

  20. High Pressure-High Temperature Phase Diagram of Beryllium

    Microsoft Academic Search

    M. J. Lipp; B. J. Baer; H. Cynn; Z. Jenei; J.-H. Klepeis; W. J. Evans; H.-P. Liermann; Y. Meng; S. V. Sinogeikin; W. Yang; A. Lazicki; Y. Ohishi

    2009-01-01

    A detailed understanding of the phase diagram of beryllium and its alloys impacts fundamental science and technological applications. Despite a simple atomic structure, theoretical modeling of the phase diagram of beryllium has been extremely challenging and remains an area of active investigation [Kadas, ,PRB 07]. Extension of the experimental understanding of beryllium will serve to inform and advance theoretical efforts