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1

Composition Inference for UML Class Diagrams Ana Milanova  

E-print Network

Composition Inference for UML Class Diagrams Ana Milanova Department of Computer Science Rensselaer [23]. UML class diagrams describe the architecture of the pro- gram in terms of classes and interclass this gap, this paper pro- poses a methodology for inference of binary associations for UML class diagrams

Bystroff, Chris

2

Composition Inference for UML Class Diagrams Ana Milanova  

E-print Network

Composition Inference for UML Class Diagrams Ana Milanova Department of Computer Science Rensselaer bridges the gap between design and code. Secondly, since composition rela- tionships explicitly state is met by component code. Verifying that compositions are implemented properly may prevent serious

Milanova, Ana

3

Supporting Collaborative Learning and Problem-Solving in a Constraint-Based CSCL Environment for UML Class Diagrams  

ERIC Educational Resources Information Center

We present COLLECT-UML, a constraint-based intelligent tutoring system (ITS) that teaches object-oriented analysis and design using Unified Modelling Language (UML). UML is easily the most popular object-oriented modelling technology in current practice. While teaching how to design UML class diagrams, COLLECT-UML also provides feedback on…

Baghaei, Nilufar; Mitrovic, Antonija; Irwin, Warwick

2007-01-01

4

Mapping UML Class Diagrams to Object-Oriented Logic Programs for Formal Model-Driven Development  

Microsoft Academic Search

MODELOG aims at automatically mapping UML class, object, statechart, activity and collaboration diagrams adorned with Object-Constraint Language expressions to non-monotonic, dynamic, object-oriented logic pro- grams in Concurrent Transaction Frame Logic (CTFL). Coupled with the Flora- 2 inference engine for CTFL, MODELOG will fill five gaps in the current UML-based infrastructure for the Common Warehouse Meta-model, Model- Driven Architecture and Semantic

Franklin Ramalho; Jacques Robin

5

Precise Identification of Composition Relationships for UML Class Diagrams Ana Milanova  

E-print Network

Precise Identification of Composition Relationships for UML Class Diagrams Ana Milanova Department of the pro- gram in terms of classes and interclass relationships; they are scalable, informative and widely-trip engineering and identification of design patterns. Towards the goal of bridging this gap, this paper pro

Bystroff, Chris

6

VISSOFT'07 Submission Kagdi, Maletic Onion Graphs for Focus+Context Views of UML Class Diagrams  

E-print Network

VISSOFT'07 Submission Kagdi, Maletic Onion Graphs for Focus+Context Views of UML Class Diagrams {hkagdi, jmaletic}@cs.kent.edu Abstract The paper introduces the use of onion graphs as a focus) and presented at varying levels of detail in onion notation. A selective aggregation technique for achieving

Maletic, Jonathan I.

7

Program Synthesizes UML Sequence Diagrams  

NASA Technical Reports Server (NTRS)

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

Barry, Matthew R.; Osborne, Richard N.

2006-01-01

8

Multidimensional Modeling with UML Package Diagrams  

Microsoft Academic Search

The Unified Modeling Language (UML) has become the defacto standard for object-oriented analysis and design, providing differentdiagrams for modeling different aspects of a system. In this paper, wepresent the development of multidimensional (MD) models for data warehouses(DW) using UML package diagrams. In this way, when modelingcomplex and large DW systems, we are not restricted to use fiat UMLclass diagrams. We

Sergio Luján-mora; Juan Trujillo; Il-yeol Song

2002-01-01

9

Representing UML Snowflake Diagram from Integrating XML Data Using XML Schema  

Microsoft Academic Search

We present a UML conceptual-level integration framework for supporting OLAP operations on diverse XML data sources. Our integration framework takes advantage of the constructs and relationships existing within XML schemas. Two processes are involved in our integration framework. The first one is to convert XML schemas into UML class diagrams. The second is to build a multidimensional model from the

Yu Li; An Aijun

2005-01-01

10

Language and Tool Support for Class and State Machine Refinement in UML-B  

E-print Network

Language and Tool Support for Class and State Machine Refinement in UML-B Mar Yah Said, Michael-oriented modelling concepts. In particular, UML-B supports class diagrams and state machines, concepts introduces the notions of refined classes and refined state machines to enable refinement of classes

Southampton, University of

11

Automatic Verification of a Behavioural Subset of UML Statechart Diagrams Using the SPIN Model-checker  

Microsoft Academic Search

.   Statechart Diagrams provide a graphical notation for describing dynamic aspects of system behaviour within the Unified Modelling\\u000a Language (UML). In this paper we present a translation from a subset of UML Statechart Diagrams - covering essential aspects\\u000a of both concurrent behaviour, like sequentialisation, parallelism, non-determinism and priority, and state refinement - into\\u000a PROMELA, the specification language of the SPIN

Diego Latella; István Majzik; Mieke Massink

1999-01-01

12

minimUML: A Minimalist Approach to UML Diagramming for Early Computer Science Education  

ERIC Educational Resources Information Center

In introductory computer science courses, the Unified Modeling Language (UML) is commonly used to teach basic object-oriented design. However, there appears to be a lack of suitable software to support this task. Many of the available programs that support UML focus on developing code and not on enhancing learning. Programs designed for…

Turner, Scott A.; Perez-Quinones, Manuel A.; Edwards, Stephen H.

2005-01-01

13

An Experiment in Using Model Driven Development: Compiling UML State Diagrams into VHDL  

E-print Network

) Model Driven Architecture (MDA) [23] set of standards. Within MDA the central idea of object compositionAn Experiment in Using Model Driven Development: Compiling UML State Diagrams into VHDL David to manage that complexity. In this paper, we discuss the results of experimenting with the use of Model

Bordbar, Behzad

14

On better understanding UML diagrams through interactive three-dimensional visualization and animation  

Microsoft Academic Search

Different approaches support the construction of software by representing certain aspects of a system graphically. Recently, the UML has become common to provide software designers with tools, in which they can create visual representations of software interactively. But the UML is intended to be drawn on two-dimensional surfaces. Our approach extends UML into a third and fourth dimension in a

Oliver Radfelder; Martin Gogolla

2000-01-01

15

A Minimal Transition System Semantics for Lightweight Class and Behavior Diagrams  

Microsoft Academic Search

We give a semantics for lightweight UML class diagrams and ultra-lightweight statechartsin terms of labeled step transition systems that embody a minimal change,maximal step semantics, and in which changes generated in a step have effect in thefollowing step. In order to define the semantics, we introduce dynamic step logic.1 Introduction1.1 PurposeIn this paper we define a mixed formal specification language

Roel Wieringa; Jan Broersen; M. Broy; D. Coleman; T. S. E. Maibaum; B. Rumpe

1998-01-01

16

UML class diagram syntax: an empirical study of comprehension  

E-print Network

Purchase,H.C. Colpoys,L. McGill,M. Carrington,D. Britton,C. Proceedings of the Australian Symposium on Information Visualisation, Eades, P. and Pattison, T. (eds) pp 113-120 Australian Computer Society

Purchase, H.C.

17

TURTLE: A Real-Time UML Profile Supported by a Formal Validation Toolkit  

Microsoft Academic Search

We present a UML 1.5 profile named TURTLE (Timed UML and RT-LOTOS Environment) endowed with a formal semantics given in terms of RT-LOTOS. TURTLE relies on UML's extensibility mechanisms to enhance class and activity diagrams. Class diagrams are extended with specialized classes named Tclasses, which communicate and synchronize through gates. Also, associations between Tclasses are attributed by a composition operator

Ludovic Apvrille; Jean-pierre Courtiat; Christophe Lohr; Pierre De Saqui-sannes

2004-01-01

18

Formal Verification of UML Diagrams: A First Step Towards Code Generation  

E-print Network

process and example. Keywords - UML specification, formalization and translation, formal methods. 1 in a formal specification language, formal methods can be used to check the correctness of such translation. However, in spite of great strides that the UML specification contributors have made in defining #12;semi-formal

Baclawski, Kenneth B.

19

Contrary-to-Duties Constraints: From UML to Relational Model  

Microsoft Academic Search

Sometimes, because of an atypical situation, an important mandatory association between classes in a UML Class Diagram must\\u000a be replaced by an optional one. That semantic and functional impoverishment happens because the mandatory constraint must\\u000a have a boolean value. In this paper we analyze the use of soft constraints in the UML Class Diagram, and their automatic repercussion\\u000a in the

Pedro Nogueira Ramos

2008-01-01

20

Semi-Automatically Inducing Semantic Classes of Clinical Research Eligibility Criteria Using UMLS and Hierarchical Clustering  

PubMed Central

This paper presents a novel approach to learning semantic classes of clinical research eligibility criteria. It uses the UMLS Semantic Types to represent semantic features and the Hierarchical Clustering method to group similar eligibility criteria. By establishing a gold standard using two independent raters, we evaluated the coverage and accuracy of the induced semantic classes. On 2,718 random eligibility criteria sentences, the inter-rater classification agreement was 85.73%. In a 10-fold validation test, the average Precision, Recall and F-score of the classification results of a decision-tree classifier were 87.8%, 88.0%, and 87.7% respectively. Our induced classes well aligned with 16 out of 17 eligibility criteria classes defined by the BRIDGE model. We discuss the potential of this method and our future work. PMID:21347026

Luo, Zhihui; Johnson, Stephen B.; Weng, Chunhua

2010-01-01

21

An ASM Semantics for UML Activity Diagrams E. Borger 1 A. Cavarra 2 E. Riccobene 2  

E-print Network

to complete and to be interruptible by the occurrence of (external or internal) events. Activity nodes can activity diagrams commonly contain the following types of nodes (also called states) and arcs. Initial state, one #12;nds an entire activity diagram which is entered by entering its (unique) initial state

Cengarle, María Victoria

22

An ASM Semantics for UML Activity Diagrams E. Borger 1 A. Cavarra 2 E. Riccobene 2  

E-print Network

by the occurrence of (external or internal) events. Activity nodes can come with entry and exit actions commonly contain the following types of nodes (also called states) and arcs. Initial nodes, exactly one per activity diagram which is entered by entering its (unique) initial state. Activity states are decomposable

Börger, Egon

23

Doclet To Synthesize UML  

NASA Technical Reports Server (NTRS)

The RoseDoclet computer program extends the capability of Java doclet software to automatically synthesize Unified Modeling Language (UML) content from Java language source code. [Doclets are Java-language programs that use the doclet application programming interface (API) to specify the content and format of the output of Javadoc. Javadoc is a program, originally designed to generate API documentation from Java source code, now also useful as an extensible engine for processing Java source code.] RoseDoclet takes advantage of Javadoc comments and tags already in the source code to produce a UML model of that code. RoseDoclet applies the doclet API to create a doclet passed to Javadoc. The Javadoc engine applies the doclet to the source code, emitting the output format specified by the doclet. RoseDoclet emits a Rose model file and populates it with fully documented packages, classes, methods, variables, and class diagrams identified in the source code. The way in which UML models are generated can be controlled by use of new Javadoc comment tags that RoseDoclet provides. The advantage of using RoseDoclet is that Javadoc documentation becomes leveraged for two purposes: documenting the as-built API and keeping the design documentation up to date.

Barry, Matthew R.; Osborne, Richard N.

2005-01-01

24

Realization of UML Class and State Machine Models in the C# Code Generation and Execution Framework  

Microsoft Academic Search

Many benefits are expected due to usage of code generation tools. A reliable application should be created effectively based on complex structural and behavioral models. Model driven approach for program development is realized in Framework for eXecutable UML (FXU). The tool transforms UML models into C# source code and supports execution of the application reflecting the behavioral model. The framework

Anna Derezinska; Romuald Pilitowski

2009-01-01

25

Using Ontologies with UML Class-based Modeling: The TwoUse Approach  

E-print Network

an integrated use of both modeling approaches in a coherent framework ­ TwoUse. We present a frame- work involving different concrete syntaxes for developing integrated models and use an OCL-like approach (UML)[1] is a visual design notation for de- signing software systems. UML is a general

Staab, Steffen

26

Critical Systems Development with UML  

E-print Network

diagram: interaction between components by message exchange Statechart diagram: dynamic component UML extension mechanisms Stereotype: specialize model element using >. Tagged value: attach {tag=value} pair to stereotyped element. Constraint: refine semantics of stereotyped element. Profile

Jurjens, Jan

27

A state-based approach to integration testing based on UML models  

Microsoft Academic Search

Correct functioning of object-oriented software depends upon the successful integration of classes. While individual classes may function correctly, several new faults can arise when these classes are integrated together. In this paper, we present a technique to enhance testing of interactions among modal classes. The technique combines UML collaboration diagrams and statecharts to automatically generate an intermediate test model, called

Shaukat Ali; Lionel C. Briand; Muhammad Jaffar-ur Rehman; Hajra Asghar; Muhammad Zohaib Z. Iqbal; Aamer Nadeem

2007-01-01

28

A UML Based Approach for Modeling and Implementing Multi-Agent Systems  

E-print Network

-ML extends the UML meta-model describing new meta-classes and stereotypes, extending the class and sequence-ML diagrams to Java implementations. TAO defines the static aspects and dynamic aspects of MAS. The static and specialization relationships. The dynamic aspects of TAO are directly related to the relationships between

Endler, Markus

29

An Investigation of Difficulties Experienced by Students Developing Unified Modelling Language (UML) Class and Sequence Diagrams  

ERIC Educational Resources Information Center

Object-oriented analysis and design (OOAD) is not an easy subject to learn. There are many challenges confronting students when studying OOAD. Students have particular difficulty abstracting real-world problems within the context of OOAD. They are unable to effectively build object-oriented (OO) models from the problem domain because they…

Sien, Ven Yu

2011-01-01

30

In Peter Aiken and Elizabeth Burd, editors, Proc. 8th Working Conference on Reverse Engineering. IEEE, Los Alamitos, 2001 Application of UML Associations and Their Adornments in Design Recovery  

E-print Network

­ stractions from a combination of code, existing design doc­ umentation (if available), personal experience. IEEE, Los Alamitos, 2001 Application of UML Associations and Their Adornments in Design Recovery Ralf: UML class diagrams, association, adorn­ ment, aggregation, composition, reverse engineering, de­ sign

Gogolla, Martin - Fachbereich 3

31

Automatic Synthesis of UML Designs from Requirements in an Iterative Process  

NASA Technical Reports Server (NTRS)

The Unified Modeling Language (UML) is gaining wide popularity for the design of object-oriented systems. UML combines various object-oriented graphical design notations under one common framework. A major factor for the broad acceptance of UML is that it can be conveniently used in a highly iterative, Use Case (or scenario-based) process (although the process is not a part of UML). Here, the (pre-) requirements for the software are specified rather informally as Use Cases and a set of scenarios. A scenario can be seen as an individual trace of a software artifact. Besides first sketches of a class diagram to illustrate the static system breakdown, scenarios are a favorite way of communication with the customer, because scenarios describe concrete interactions between entities and are thus easy to understand. Scenarios with a high level of detail are often expressed as sequence diagrams. Later in the design and implementation stage (elaboration and implementation phases), a design of the system's behavior is often developed as a set of statecharts. From there (and the full-fledged class diagram), actual code development is started. Current commercial UML tools support this phase by providing code generators for class diagrams and statecharts. In practice, it can be observed that the transition from requirements to design to code is a highly iterative process. In this talk, a set of algorithms is presented which perform reasonable synthesis and transformations between different UML notations (sequence diagrams, Object Constraint Language (OCL) constraints, statecharts). More specifically, we will discuss the following transformations: Statechart synthesis, introduction of hierarchy, consistency of modifications, and "design-debugging".

Schumann, Johann; Whittle, Jon; Clancy, Daniel (Technical Monitor)

2001-01-01

32

UML Tutorial  

NSDL National Science Digital Library

It provides a very high level introduction to UML. It also suggests some further reading materials on business process modeling, the use case model, the logical model, the component model and the dynamic model. (UNC E-Learning Grant)

2007-01-23

33

Hasse Diagrams for Classes of Deterministic Bottom-Up Tree-to-Tree-Series  

E-print Network

Hasse Diagrams for Classes of Deterministic Bottom-Up Tree-to-Tree-Series Transformations Andreas The relationship between classes of tree-to-tree-series and o-tree-to-tree-series trans- formations, which are computed by restricted deterministic bottom-up weighted tree transducers, is investigated. Essentially

Reyle, Uwe

34

Calculation of a Class of Three-Loop Vacuum Diagrams with Two Different Mass Values  

E-print Network

We calculate analytically a class of three-loop vacuum diagrams with two different mass values, one of which is one-third as large as the other, using the method of Chetyrkin, Misiak, and Münz in the dimensional regularization scheme. All pole terms in \\epsilon=4-D (D being the space-time dimensions in a dimensional regularization scheme) plus finite terms containing the logarithm of mass are kept in our calculation of each diagram.

Chung, J M

1999-01-01

35

Calculation of a Class of Three-Loop Vacuum Diagrams with Two Different Mass Values  

E-print Network

We calculate analytically a class of three-loop vacuum diagrams with two different mass values, one of which is one-third as large as the other, using the method of Chetyrkin, Misiak, and M\\"{u}nz in the dimensional regularization scheme. All pole terms in \\epsilon=4-D (D being the space-time dimensions in a dimensional regularization scheme) plus finite terms containing the logarithm of mass are kept in our calculation of each diagram. It is shown that three-loop effective potential calculated using three-loop integrals obtained in this paper agrees, in the large-N limit, with the overlap part of leading-order (in the large-N limit) calculation of Coleman, Jackiw, and Politzer [Phys. Rev. D {\\bf 10}, 2491 (1974)].

J. -M. Chung; B. K. Chung

1999-04-23

36

UMLAnT: an Eclipse plugin for animating and testing UML designs  

Microsoft Academic Search

We describe the UML Animator and Tester (UMLAnT), which is an Eclipse plug-in for animating and testing UML models. UMLAnT can be used both by developers in the software industry and students who are learning concepts in object-oriented modeling. UMLAnT helps designers visualize the behavior specified in a UML model by displaying animated object diagrams and sequence diagrams. UMLAnT allows

Trung T. Dinh-trong; Sudipto Ghosh; Michael Hamilton; Brent Wilkins

2005-01-01

37

Comprehensive Aspectual UML Approach to Support AspectJ  

PubMed Central

Unified Modeling Language is the most popular and widely used Object-Oriented modelling language in the IT industry. This study focuses on investigating the ability to expand UML to some extent to model crosscutting concerns (Aspects) to support AspectJ. Through a comprehensive literature review, we identify and extensively examine all the available Aspect-Oriented UML modelling approaches and find that the existing Aspect-Oriented Design Modelling approaches using UML cannot be considered to provide a framework for a comprehensive Aspectual UML modelling approach and also that there is a lack of adequate Aspect-Oriented tool support. This study also proposes a set of Aspectual UML semantic rules and attempts to generate AspectJ pseudocode from UML diagrams. The proposed Aspectual UML modelling approach is formally evaluated using a focus group to test six hypotheses regarding performance; a “good design” criteria-based evaluation to assess the quality of the design; and an AspectJ-based evaluation as a reference measurement-based evaluation. The results of the focus group evaluation confirm all the hypotheses put forward regarding the proposed approach. The proposed approach provides a comprehensive set of Aspectual UML structural and behavioral diagrams, which are designed and implemented based on a comprehensive and detailed set of AspectJ programming constructs. PMID:25136656

Magableh, Aws; Shukur, Zarina; Mohd. Ali, Noorazean

2014-01-01

38

Reasoning with Diagrams: Final Report  

Microsoft Academic Search

The standard notation for modelling software systems is the Unified Modelling Language (UML). This consists of a suite of mainly diagrammatic notations. However, UML's constraint language, OCL, is entirely textual, making the notation less accessible to practitioners. The Reasoning with Diagrams project aims to build the foundation for more accessible no-tations for practitioners, building on and consolidating ex-isting theoretical and

John Howse; Richard Bosworth; Andrew Fish; John Taylor; Peter Rodgers; Gem Stapleton; Simon Thompson

39

Impact Analysis and Change Management of UML Models L. C. Briand, Y. Labiche, L. O'Sullivan  

E-print Network

Impact Analysis and Change Management of UML Models L. C. Briand, Y. Labiche, L. O in turn lead to subsequent changes to other elements in the UML diagrams. Impact analysis is then defined to be modified to accomplish a change. In this article, we propose a UML model-based approach to impact analysis

Carleton University

40

Conversion of Octopus UML Models into Eclipse UML2 Models  

E-print Network

Conversion of Octopus UML Models into Eclipse UML2 Models Student Project Submitted by: A. Jibran for Precise UML Specifications (Octopus) and Eclipse Modeling Framework (EMF) are the examples of these UML tools which have their own strength. Octopus has focused so far on modeling-time checking of well

Moeller, Ralf

41

Verification of UML-Based Real-Time System Designs by Means of cTLA  

Microsoft Academic Search

The Unified Modeling Language UML is well-suited for the design of real-time systems. In particular, the design of dynamic system behaviors is supported by interaction diagrams and statecharts. Real-time aspects of behaviors can be described by time constraints. The semantics of the UML, however, is non-formal. In order to enable formal design verification, we therefore propose to complement the UML

Günter Graw; Peter Herrmann; Heiko Krumm

2000-01-01

42

Metamodeling Mathematics: A Precise and Visual Framework for Describing Semantics Domains of UML Models  

Microsoft Academic Search

As UML 2.0 is evolving into a family of languages with individually specified semantics, there is an increasing need for automated and provenly cor- rect model transformations that (i) assure the integration of local views (different diagrams) of the system into a consistent global view, and, (ii) provide a well- founded mapping from UML models to different semantic domains (Petri

Dániel Varró; András Pataricza

2002-01-01

43

Translation from UML to Markov Model: A Performance Modeling Framework  

NASA Astrophysics Data System (ADS)

Performance engineering focuses on the quantitative investigation of the behavior of a system during the early phase of the system development life cycle. Bearing this on mind, we delineate a performance modeling framework of the application for communication system that proposes a translation process from high level UML notation to Continuous Time Markov Chain model (CTMC) and solves the model for relevant performance metrics. The framework utilizes UML collaborations, activity diagrams and deployment diagrams to be used for generating performance model for a communication system. The system dynamics will be captured by UML collaboration and activity diagram as reusable specification building blocks, while deployment diagram highlights the components of the system. The collaboration and activity show how reusable building blocks in the form of collaboration can compose together the service components through input and output pin by highlighting the behavior of the components and later a mapping between collaboration and system component identified by deployment diagram will be delineated. Moreover the UML models are annotated to associate performance related quality of service (QoS) information which is necessary for solving the performance model for relevant performance metrics through our proposed framework. The applicability of our proposed performance modeling framework in performance evaluation is delineated in the context of modeling a communication system.

Khan, Razib Hayat; Heegaard, Poul E.

44

Secure Systems Development with UML  

E-print Network

Secure Systems Development with UML: Applications to Telemedicine Jan Jürjens Software & Systems://www.jurjens.de/jan #12;Jan Jürjens, TU Munich: Secure Systems Development with UML: Telemedicine 2 A need for Security to be secure. #12;Jan Jürjens, TU Munich: Secure Systems Development with UML: Telemedicine 3 Telemedicine

Jurjens, Jan

45

BGen: A UML Behavior Network Generator Tool  

NASA Technical Reports Server (NTRS)

BGen software was designed for autogeneration of code based on a graphical representation of a behavior network used for controlling automatic vehicles. A common format used for describing a behavior network, such as that used in the JPL-developed behavior-based control system, CARACaS ["Control Architecture for Robotic Agent Command and Sensing" (NPO-43635), NASA Tech Briefs, Vol. 32, No. 10 (October 2008), page 40] includes a graph with sensory inputs flowing through the behaviors in order to generate the signals for the actuators that drive and steer the vehicle. A computer program to translate Unified Modeling Language (UML) Freeform Implementation Diagrams into a legacy C implementation of Behavior Network has been developed in order to simplify the development of C-code for behavior-based control systems. UML is a popular standard developed by the Object Management Group (OMG) to model software architectures graphically. The C implementation of a Behavior Network is functioning as a decision tree.

Huntsberger, Terry; Reder, Leonard J.; Balian, Harry

2010-01-01

46

Standardizing Clinical Trials Workflow Representation in UML for International Site Comparison  

PubMed Central

Background With the globalization of clinical trials, a growing emphasis has been placed on the standardization of the workflow in order to ensure the reproducibility and reliability of the overall trial. Despite the importance of workflow evaluation, to our knowledge no previous studies have attempted to adapt existing modeling languages to standardize the representation of clinical trials. Unified Modeling Language (UML) is a computational language that can be used to model operational workflow, and a UML profile can be developed to standardize UML models within a given domain. This paper's objective is to develop a UML profile to extend the UML Activity Diagram schema into the clinical trials domain, defining a standard representation for clinical trial workflow diagrams in UML. Methods Two Brazilian clinical trial sites in rheumatology and oncology were examined to model their workflow and collect time-motion data. UML modeling was conducted in Eclipse, and a UML profile was developed to incorporate information used in discrete event simulation software. Results Ethnographic observation revealed bottlenecks in workflow: these included tasks requiring full commitment of CRCs, transferring notes from paper to computers, deviations from standard operating procedures, and conflicts between different IT systems. Time-motion analysis revealed that nurses' activities took up the most time in the workflow and contained a high frequency of shorter duration activities. Administrative assistants performed more activities near the beginning and end of the workflow. Overall, clinical trial tasks had a greater frequency than clinic routines or other general activities. Conclusions This paper describes a method for modeling clinical trial workflow in UML and standardizing these workflow diagrams through a UML profile. In the increasingly global environment of clinical trials, the standardization of workflow modeling is a necessary precursor to conducting a comparative analysis of international clinical trials workflows. PMID:21085484

de Carvalho, Elias Cesar Araujo; Jayanti, Madhav Kishore; Batilana, Adelia Portero; Kozan, Andreia M. O.; Rodrigues, Maria J.; Shah, Jatin; Loures, Marco R.; Patil, Sunita; Payne, Philip; Pietrobon, Ricardo

2010-01-01

47

Implementation of UML Schema to RDBM  

NASA Astrophysics Data System (ADS)

Multiple disciplines - especially those within the earth and physical sciences, and increasingly those within social science and medical fields - require Geographic Information (GI) i.e. information concerning phenomena implicitly or explicitly associated with a location relative to the Earth [1]. Therefore geographic datasets are increasingly being shared, exchanged and frequently used for purposes other than those for which they were originally intended. The ISO Technical Committee 211 (ISO/TC 211) together with Open Geospatial Consortium (OGC) provide a series of standards and guidelines for developing application schemas which should: a) capture relevant conceptual aspects of the data involved; and b) be sufficient to satisfy previously defined use-cases of a specific or cross-domain concerns. In addition, the Hollow World technology offers an accessible and industry-standardised methodology for creating and editing Application Schema UML models which conform to international standards for interoperable GI [2]. We present a technology which seamlessly transforms an Application Schema UML model to a relational database model (RDBM). This technology, using the same UML information model, complements the XML transformation of an information model produced by the FullMoon tool [2]. In preparation for the generation of a RDBM the UML model is first mapped to a collection of OO classes and relationships. Any external dependencies that exist are then resolved through the same mechanism. However, a RDBM does not support a hierarchical (relational) data structure - a function that may be required by UML models. Previous approaches have addressed this problem through use of nested sets or an adjacent list to represent such structure. Our unique strategy addresses the hierarchical data structure issue, whether singular or multiple inheritance, by hiding a delegation pattern within an OO class. This permits the object-relational mapping (ORM) software used to generate the RDBM to easily map the class into the RDBM. In other words the particular structure of the resulting OO class may expose a "composition-like aspect" to the ORM whilst maintaining an "inherited-like aspect" for use within an OO program. This methodology has been used to implement a software application to manages the new CEDA metadata model which is based on MOLES 3.4, Python, Django and SQLAlchemy.

Nagni, M.; Ventouras, S.; Parton, G.

2012-04-01

48

VPM: A visual, precise and multilevel metamodeling framework for describing mathematical domains and UML (The Mathematics of Metamodeling is Metamodeling Mathematics)  

Microsoft Academic Search

Abstract As UML 2 0 is evolving into a family of languages with individually specified semantics, there is an increasing need for automated and provenly correct model transformations that (i) assure the integration of local views (different diagrams) of the system into a consistent global view, and, (ii) provide a well - founded mapping from UML models to different seman

Dániel Varró; András Pataricza

2003-01-01

49

Exploration games for UML software design   

E-print Network

The Unified Modeling Language (UML) has become the standard language for the design of object-oriented software systems over the past decade. Even though there exist various tools which claim to support design with UML, ...

Tenzer, Jennifer

50

A UML profile for the OBO relation ontology  

PubMed Central

Background Ontologies have increasingly been used in the biomedical domain, which has prompted the emergence of different initiatives to facilitate their development and integration. The Open Biological and Biomedical Ontologies (OBO) Foundry consortium provides a repository of life-science ontologies, which are developed according to a set of shared principles. This consortium has developed an ontology called OBO Relation Ontology aiming at standardizing the different types of biological entity classes and associated relationships. Since ontologies are primarily intended to be used by humans, the use of graphical notations for ontology development facilitates the capture, comprehension and communication of knowledge between its users. However, OBO Foundry ontologies are captured and represented basically using text-based notations. The Unified Modeling Language (UML) provides a standard and widely-used graphical notation for modeling computer systems. UML provides a well-defined set of modeling elements, which can be extended using a built-in extension mechanism named Profile. Thus, this work aims at developing a UML profile for the OBO Relation Ontology to provide a domain-specific set of modeling elements that can be used to create standard UML-based ontologies in the biomedical domain. Results We have studied the OBO Relation Ontology, the UML metamodel and the UML profiling mechanism. Based on these studies, we have proposed an extension to the UML metamodel in conformance with the OBO Relation Ontology and we have defined a profile that implements the extended metamodel. Finally, we have applied the proposed UML profile in the development of a number of fragments from different ontologies. Particularly, we have considered the Gene Ontology (GO), the PRotein Ontology (PRO) and the Xenopus Anatomy and Development Ontology (XAO). Conclusions The use of an established and well-known graphical language in the development of biomedical ontologies provides a more intuitive form of capturing and representing knowledge than using only text-based notations. The use of the profile requires the domain expert to reason about the underlying semantics of the concepts and relationships being modeled, which helps preventing the introduction of inconsistencies in an ontology under development and facilitates the identification and correction of errors in an already defined ontology. PMID:23095840

2012-01-01

51

UML for the conceptual web  

Microsoft Academic Search

Purpose – The purpose of this paper is to propose the use of unified modelling language (UML) based ontologies to develop a faceted model to facilitate semantic browsing and searching in digital libraries. Design\\/methodology\\/approach – The approach is to understand the way information gets logically organised in the human mind in terms of mutually defined concepts. Ontologies will be used

Devika P. Madalli; Aparajita Suman

2008-01-01

52

Describing Software Architecture with UML  

Microsoft Academic Search

This paper describes our experience using UML, the Unified Modeling Lan- guage, to describe the software architecture of a system. We found that it works well for communicating the static structure of the architecture: the elements of the architecture, their relations, and the variability of a structure. These static properties are much more readily described with it than the dynamic

Christine Hofmeister; Robert L. Nord; Dilip Soni

1999-01-01

53

Exploiting UMLS Semantics for Checking Semantic Consistency among UMLS concepts  

PubMed Central

Objectives To quantify semantic inconsistency in UMLS concepts from the perspective of their hierarchical relations and to show through examples how semantically-inconsistent concepts can help reveal erroneous synonymy relations. Methods Inconsistency is defined in reference to concepts from the UMLS Metathesaurus. Consistency is evaluated by comparing the semantic groups of the two concepts in each pair of hierarchically-related concepts. A limited number of inconsistent concepts was inspected manually. Results 81,512 concepts are inconsistent due to the differences in semantic groups between a concept and its parent. Four examples of wrong synonymy are presented. Conclusions A vast majority of inconsistent hierarchical relations are not indicative of any errors. We discovered an interesting semantic pattern along hierarchies, which seems associated with wrong synonymy. PMID:20841786

Erdogan, Halit; Erdem, Esra; Bodenreider, Olivier

2015-01-01

54

Object Oriented Database Management System: A UML Design Approach  

Microsoft Academic Search

In this paper, we adopt a state-of-the-art technology to design an Object-Oriented Database Management System (OODBMS) for the management of information in Nigerian Universities. We apply the object-oriented design tools to create a database model that is reliable, dependable and secure. We focus on creating a unified modeling language (UML) structure by specifying the use case, classes, and activities in

Uduak A. Umoh; Enoch O. Nwachukwu; Imo J. Eyoh; Augustine A. Umoh

55

Phase Equilibria Diagrams Database  

National Institute of Standards and Technology Data Gateway

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

56

Data Mapping Diagrams for Data Warehouse Design with UML  

Microsoft Academic Search

In Data Warehouse (DW) scenarios, ETL (Extraction, Trans- formation, Loading) processes are responsible for the extraction of data from heterogeneous operational data sources, their transformation (con- version, cleaning, normalization, etc.) and their loading into the DW. In this paper, we present a framework for the design of the DW back-stage (and the respective ETL processes) based on the key observation

Sergio Luján-mora; Panos Vassiliadis; Juan Trujillo

2004-01-01

57

Aspect-Oriented Subprogram Synthesizes UML Sequence Diagrams  

NASA Technical Reports Server (NTRS)

The Rational Sequence computer program described elsewhere includes a subprogram that utilizes the capability for aspect-oriented programming when that capability is present. This subprogram is denoted the Rational Sequence (AspectJ) component because it uses AspectJ, which is an extension of the Java programming language that introduces aspect-oriented programming techniques into the language

Barry, Matthew R.; Osborne, Richard N.

2006-01-01

58

BUSINESS PROCESS MODELING WITH UML Nuno Castela  

E-print Network

BUSINESS PROCESS MODELING WITH UML Nuno Castela Escola Superior de Tecnologia de Castelo Branco@est.ipcb.pt Key words: Modeling, Business processes, UML Abstract: This paper focuses the reasons and advantages and description of the methodology to apply business modeling is made, namely, the organization of the modeling

59

Teaching Object-Oriented Modelling Using UML  

NASA Astrophysics Data System (ADS)

The paper elaborates on experiences and lessons learned from the course on object-oriented analyses and design at the Faculty of Sciences, Novi Sad. In the paper we identify a set of issues concerning teaching modeling and UML. It is described experience of teaching UML to students with and without previous knowledge of object-oriented programming.

Boberi?-Krsti?ev, Danijela; Tešendi?, Danijela

2011-09-01

60

Mapping COSA Software Architecture Concepts into UML 2.0  

Microsoft Academic Search

In this article we contribute to the issue of documenting architectural description with UML. Describing the architecture of a software system using UML notations is a tricky task due to the lack of explicit support for architectural description concepts. Thus, we try to define a strategy to map any ADL into UML, particularly UML 2.0. Our strategy is based on

Tahar Khammaci; A. Smeda; M. Oussalah

2006-01-01

61

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

62

Using UMLS semantics for classification purposes.  

PubMed Central

The Unified Medical Language System (UMLS) contains semantic information about terms from various sources; each concept can be understood and located by its relationships to other concepts. We describe a method in which the semantic relationships between UMLS concepts are exploited for the purpose of classification. This method combines three existing components: 1) Mapping terms to UMLS concepts; 2) Restricting UMLS concepts to MeSH; and 3) Mapping MeSH terms to disease categories. When applied to the automatic classification of condition terms into broad disease categories in the Clinical Trials database, this method assigned relevant categories to 92% of the 1823 condition terms encountered. 135 (7%) failed to be classified and 14 (.77%) were misclassified. The limits of this method are discussed, as well as the reuse of existing components, and the tuning required to achieve automatic classification. PMID:11079850

Bodenreider, O.

2000-01-01

63

A Lightweight UML-based Reverse Engineering for Object-Oriented Fortran: ForUML  

E-print Network

A Lightweight UML-based Reverse Engineering for Object-Oriented Fortran: ForUML Aziz implement computational sci- ence and engineering software have adopted the object-oriented (OO) Fortran paradigm. One of the challenges faced by OO Fortran developers is the inability to obtain high level

Carver, Jeffrey C.

64

Venn Diagrams  

NSDL National Science Digital Library

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

2010-01-01

65

Venn Diagrams and Logic  

NSDL National Science Digital Library

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

2011-01-04

66

Venn Diagrams  

NSDL National Science Digital Library

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

67

Definition von UML mit UML und OCL: Uberblick zum Stand der Technik  

E-print Network

Hussmann, Shu­ saku Iida, Stuart Kent, Alain Le Guennec, Tom Mens, Richard Mitchell, Oliver Radfelder] Martin Gogolla and Mark Richters. On Constraints and Queries in UML. In Martin Schader and Axel Korthaus

Gogolla, Martin - Fachbereich 3

68

Extending the UML for Multidimensional Modeling  

Microsoft Academic Search

Multidimensional (MD) modeling is the foundation of data warehouses, MD databases, and On-Line Analytical Processing (OLAP) applications. In the past few years, there have been some proposals for representing the main MD properties at the conceptual level providing their own notations. In this paper, we present an extension of the Unified Modeling Language (UML), by means of stereotypes, to elegantly

Sergio Luján-mora; Juan Trujillo; Il-yeol Song

2002-01-01

69

Guelph Physics Tutorials: Free Body Diagrams  

NSDL National Science Digital Library

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

2007-04-23

70

Multidimensional Modeling using UML and XML  

Microsoft Academic Search

Multidimensional (MD) modeling is the foundation of data warehouses, MD databases, and OnLineAnalytical Processing (OLAP) applications. In the past years, there have been some proposalsfor representing the main MD properties at the conceptual level providing their own notations. In thispaper, we present an extension of the Unified Modeling Language (UML), by means of stereotypes,to elegantly represent main structural and dynamic

Sergio Luján-mora

71

Model Driven Development with Mechatronic UML  

Microsoft Academic Search

Model Driven Development with Mechatronic UML Visual languages form a constituent part of a well-established software development\\u000a paradigm, namely model driven development. The structure and functionality of the software is precisely specified by a model\\u000a which can be formally analyzed concerning important (safety and liveness) properties of the system under construction. Executable\\u000a code is automatically generated from the model.\\u000a \\u000a Although

Wilhelm Schäfer

2008-01-01

72

Transforming UML Models to Formal Specifications  

Microsoft Academic Search

The Unified Modeling Language (UML) is considered a significant step in the development ofobject-oriented (OO) notations in that it is based on some of the best OO modeling experiences.In this paper we are considering more specifically its use in the context of high-quality modelingof complex systems. We believe that the lack of firm semantics for the modeling notations usedmakes, among

Jean-michel Bruel

1998-01-01

73

State-Transition Diagrams for Biologists  

PubMed Central

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

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

2012-01-01

74

Venn diagrams  

NSDL National Science Digital Library

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

National Science Digital Library (NSDL) Middle School Portal Staff

2008-03-10

75

Using Unified Modelling Language (UML) as a process-modelling technique for clinical-research process improvement.  

PubMed

The Primary Care Data Quality programme (PCDQ) is a quality-improvement programme which processes routinely collected general practice computer data. Patient data collected from a wide range of different brands of clinical computer systems are aggregated, processed, and fed back to practices in an educational context to improve the quality of care. Process modelling is a well-established approach used to gain understanding and systematic appraisal, and identify areas of improvement of a business process. Unified modelling language (UML) is a general purpose modelling technique used for this purpose. We used UML to appraise the PCDQ process to see if the efficiency and predictability of the process could be improved. Activity analysis and thinking-aloud sessions were used to collect data to generate UML diagrams. The UML model highlighted the sequential nature of the current process as a barrier for efficiency gains. It also identified the uneven distribution of process controls, lack of symmetric communication channels, critical dependencies among processing stages, and failure to implement all the lessons learned in the piloting phase. It also suggested that improved structured reporting at each stage - especially from the pilot phase, parallel processing of data and correctly positioned process controls - should improve the efficiency and predictability of research projects. Process modelling provided a rational basis for the critical appraisal of a clinical data processing system; its potential maybe underutilized within health care. PMID:17365645

Kumarapeli, P; De Lusignan, S; Ellis, T; Jones, B

2007-03-01

76

A UML-based meta-framework for system design in public health informatics.  

PubMed Central

The National Agenda for Public Health Informatics calls for standards in data and knowledge representation within public health, which requires a multi-level framework that links all aspects of public health. METHOD: The literature of public health informatics and public health informatics application were reviewed. A UML-based systems analysis was performed. Face validity of results was evaluated in analyzing the public health domain of lead poisoning. RESULTS: The core class of the UML-based system of public health is the Public Health Domain, which is associated with multiple Problems, for which Actors provide Perspectives. Actors take Actions that define, generate, utilize and/or evaluate Data Sources. The life cycle of the domain is a sequence of activities attributed to its problems that spirals through multiple iterations and realizations within a domain. CONCLUSION: The proposed Public Health Informatics Meta-Framework broadens efforts in applying informatics principles to the field of public health PMID:12463890

Orlova, Anna O.; Lehmann, Harold

2002-01-01

77

Interpreting T-X Diagrams  

NSDL National Science Digital Library

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

Perkins, Dexter

78

Query expansion using the UMLS Metathesaurus.  

PubMed Central

Recent work has demonstrated the importance of query expansion for improving retrieval effectiveness when applying statistically-based systems to MEDLINE citations. The research has suggested the use of retrieval feedback for enhancing the original text of users' queries. As an alternative method of query expansion, we propose the use of the MetaMap program for associating UMLS Metathesaurus concepts with the original query. Our experiments show that query expansion based on MetaMap compares favorably with retrieval feedback. We conclude that the optimal strategy would be to combine the two techniques. PMID:9357673

Aronson, A. R.; Rindflesch, T. C.

1997-01-01

79

Model Checking - Timed UML State Machines and Collaborations  

Microsoft Academic Search

We describe a prototype tool, HUGO\\/RT, that is designed to automati- cally verify whether the timed state machines in a UML model interact according to scenarios specified by time-annotated UML collaborations. Timed state ma- chines are compiled into timed automata that exchange signals and operations via a network automaton. A collaboration with time constraints is translated into an observer timed

Alexander Knapp; Stephan Merz; Christopher Rauh

2002-01-01

80

UML Human Resources Modified: 6/1/2012  

E-print Network

UML Human Resources Modified: 6/1/2012 Amherst · Boston · Dartmouth · Lowell · President's Office___ __________________________ ____________ __________________________ ____________ Department Head Signature Date Department Head Signature Date Human Resource Use Only Full-Time Employee of tuition benefit______ ___________________________ ____________ Human Resource Designee Date #12;UML Human

Massachusetts at Lowell, University of

81

BUSINESS PROCESSES EXTENSIONS TO UML PROFILE FOR BUSINESS MODELING  

E-print Network

BUSINESS PROCESSES EXTENSIONS TO UML PROFILE FOR BUSINESS MODELING Pedro Sinogas, André Vasconcelos@ceo.inesc.pt, jneves@ieee.org, rmendes@ceo.inesc.pt, jmt@inesc.pt Key words: Business Modeling, Business Process modeling business processes. This paper proposes an extension to UML Profile for Business Modeling

82

Multidimensional Modeling with UML Package Sergio Lujn-Mora  

E-print Network

. Furthermore, we provide a UML extension by means of stereotypes of the particular package items we use. Finally, we show how to use these stereotypes in Rational Rose 2000 for MD modeling. Keywords: UML proposed in the last few years [1][2][3][4] to represent main MD structural and dynamic properties. However

Song, Il-Yeol

83

Representing Thoughts, Words, and Things in the UMLS  

PubMed Central

The authors describe a framework, based on the Ogden-Richards semiotic triangle, for understanding the relationship between the Unified Medical Language System (UMLS) and the source terminologies from which the UMLS derives its content. They pay particular attention to UMLS's Concept Unique Identifier (CUI) and the sense of “meaning” it represents as contrasted with the sense of “meaning” represented by the source terminologies. The CUI takes on emergent meaning through linkage to terms in different terminology systems. In some cases, a CUI's emergent meaning can differ significantly from the original sources' intended meanings of terms linked by that CUI. Identification of these different senses of meaning within the UMLS is consistent with historical themes of semantic interpretation of language. Examination of the UMLS within such a historical framework makes it possible to better understand the strengths and limitations of the UMLS approach for integrating disparate terminologic systems and to provide a model, or theoretic foundation, for evaluating the UMLS as a Possible World—that is, as a mathematical formalism that represents propositions about some perspective or interpretation of the physical world. PMID:9760390

Campbell, Keith E.; Oliver, Diane E.; Spackman, Kent A.; Shortliffe, Edward H.

1998-01-01

84

Deb_Huber@uml.edu or 978.934.4133 website www.uml.edu/neywe other: www.uml.edu/music (Performance Groups) New EnglandNew England Youth Wind EnsemblesYouth Wind Ensembles  

E-print Network

program, as the young players have skill on their instrument but seek growth in concepts, and the musicDeb_Huber@uml.edu or 978.934.4133 website www.uml.edu/neywe other: www.uml.edu/music (Performance the Department of Music at the University of Massachusetts Lowell. For those younger musicians looking for more

Massachusetts at Lowell, University of

85

Exploring the UMLS: a rough sets based theoretical framework.  

PubMed Central

The Unified Medical Language System (UMLS) [1] has a unique and leading position in the evolution of thesauri and metathesauri. Features that set it apart are: its composition from more than fifty component health care vocabularies; the sophisticated UMLS ontology linking the Metathesaurus with structures such as the Semantic Network and the SPECIALIST lexicon; and the high level of social collaboration invested in its construction and growth. It is our thesis that in order to successfully harness such a complex vocabulary for text retrieval we need sophisticated methods derived from a deeper understanding of the UMLS system. Thus we propose a theoretical framework based on the theory of rough sets, that supports the systematic and exploratory investigation of the UMLS Metathesaurus for text retrieval. Our goal is to make it more feasible for individuals such as patients and health care professionals to access relevant information at the point of need. PMID:10566340

Srinivasan, P.

1999-01-01

86

Resummation of Cactus Diagrams in Lattice QCD  

E-print Network

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

H. Panagopoulos; E. Vicari

1998-06-08

87

Describing different brain computer interface systems through a unique model: a UML implementation.  

PubMed

All the protocols currently implemented in brain computer interface (BCI) experiments are characterized by different structural and temporal entities. Moreover, due to the lack of a unique descriptive model for BCI systems, there is not a standard way to define the structure and the timing of a BCI experimental session among different research groups and there is also great discordance on the meaning of the most common terms dealing with BCI, such as trial, run and session. The aim of this paper is to provide a unified modeling language (UML) implementation of BCI systems through a unique dynamic model which is able to describe the main protocols defined in the literature (P300, mu-rhythms, SCP, SSVEP, fMRI) and demonstrates to be reasonable and adjustable according to different requirements. This model includes a set of definitions of the typical entities encountered in a BCI, diagrams which explain the structural correlations among them and a detailed description of the timing of a trial. This last represents an innovation with respect to the models already proposed in the literature. The UML documentation and the possibility of adapting this model to the different BCI systems built to date, make it a basis for the implementation of new systems and a mean for the unification and dissemination of resources. The model with all the diagrams and definitions reported in the paper are the core of the body language framework, a free set of routines and tools for the implementation, optimization and delivery of cross-platform BCI systems. PMID:18607780

Quitadamo, Lucia Rita; Marciani, Maria Grazia; Cardarilli, Gian Carlo; Bianchi, Luigi

2008-01-01

88

Automatic Diagrams Analysis  

Microsoft Academic Search

This paper presents fully automatic approach analysis for information extraction from digitized grey level images of scanned diagrams in the field of graphics recognition. The proposed algorithms were tested on Telecom Egypt diagrams and some randomly selected diagrams. The analysis involves three distinct stages: the location of starting pixels in the diagrams; followed by a model based line-following to separate

M. A. Berbar

2006-01-01

89

Performance Analysis of Security Aspects by Weaving Scenarios Extracted from UML Models  

E-print Network

developed previously in the PUMA project, which take as input UML models annotated with the standard UML as many efforts in performance analysis [3], of which the PUMA system [31],[32] is an example. In PUMA

Petriu, Dorina

90

Chord diagrams and BPHZ subtractions  

E-print Network

The combinatorics of the BPHZ subtraction scheme for a class of ladder graphs for the three point vertex in $\\phi^3$ theory is transcribed into certain connectivity relations for marked chord diagrams (knots with transversal intersections). The resolution of the singular crossings using the equivalence relations in these examples provides confirmation of a proposed fundamental relationship between knot theory and renormalization in perturbative quantum field theory.

Ioannis Tsohantjis; Alex C Kalloniatis; Peter D Jarvis

1996-04-30

91

UML for Real-Time 04/16/98 page 1 of 8  

E-print Network

design patterns. UML for Real-Time is a complete real-time modeling standard, co-developed by ObjecTimeUML for Real-Time 04/16/98 page 1 of 8 Abstract This paper explains how the Unified Modeling Language (UML), and powerful modeling constructs originally developed for the modeling of complex real-time

Pentus, Mati

92

UML: A Modern Dinosaur? A Critical Analysis of the Unified Modelling Language  

Microsoft Academic Search

The Unified Modeling Language (UML) is claimed to become a standard tool for the conceptual modelling and development of modern Information Systems. In this paper we analyse the concepts of UML and compare them with a rather old industrial development method ISOTEC and the Co-Design approach propagated by the author and others. We show that in many respects UML is

Klaus-dieter Schewe

2000-01-01

93

Definition of a new kind of UML stereotype based on OMG metamodel  

Microsoft Academic Search

Summary form only given. UML (Unified Modelling Language) is a universal language for modelling of object-oriented applications. UML can build models of different kinds of domains. However, no paradigm is enough to clearly model all views of all possible domains. For this reason, there are several metamodel elements to extend UML and facilitate the modelling of specific domains. We analyze

Narayan Debnath; D. Riesco; G. Montejano; A. Grumelli; A. Maccio; P. Martellotto

2003-01-01

94

Vehicle System Management Modeling in UML for Ares I  

NASA Technical Reports Server (NTRS)

The Spacecraft & Vehicle Systems Department of Marshall Space Flight Center is responsible for modeling the Vehicle System Management for the Ares I vehicle which was a part of the now canceled Constellation Program. An approach to generating the requirements for the Vehicle System Management was to use the Unified Modeling Language technique to build and test a model that would fulfill the Vehicle System Management requirements. UML has been used on past projects (flight software) in the design phase of the effort but this was the first attempt to use the UML technique from a top down requirements perspective.

Pearson, Newton W.; Biehn, Bradley A.; Curry, Tristan D.; Martinez, Mario R.

2011-01-01

95

Students' Different Understandings of Class Diagrams  

ERIC Educational Resources Information Center

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

Boustedt, Jonas

2012-01-01

96

Real-Time UML State Machines: An Analysis Approach  

Microsoft Academic Search

Since real-time systems have special characteristics the development of such systems requires the observation of quantitative system aspects. Quan- titative predictions are needed already during the modeling phase of the system development process. Recently the Unified Modeling Language (UML) includ- ing its Profile for Schedulability, Performance, and Time (SPT) gained increas- ing acceptance as a specification language for modeling real-time

J. Trowitzsch; A. Zimmermann

97

Towards a UML Profile for Software Product Lines  

Microsoft Academic Search

This paper proposes a UML profile for software product lines. This profile includes stereotypes, tagged values, and structural constraints and it makes possible to define PL models with variabilities. Product derivation consists in generating product models from PL models. The derivation should preserve and ensure a set of constraints which are specified using the OCL.

Tewfik Ziadi; Loïc Hélouët; Jean-marc Jézéquel

2003-01-01

98

MDA: Revenge of the Modelers or UML Utopia?  

Microsoft Academic Search

Modeling is at the core of many disciplines, but it is especially important in engineering because it facilitates communication and constructs complex things from smaller parts. Model engineering or model-driven development, treats software development as a set of transformations between successive models from requirements to analysis, to design, to implementation, to deployment. We discuss UML and MDA tools for developing

Dave A. Thomas

2004-01-01

99

TOWARD A HUMAN-CENTERED UML FOR RISK ANALYSIS  

E-print Network

TOWARD A HUMAN-CENTERED UML FOR RISK ANALYSIS Application to a medical robot Jérémie Guiochet1. The first and important step of this activity is risk analysis. During risk analysis, two main studies concerning human factors must be integrated: task analysis and human error analysis. This multidisciplinary

Paris-Sud XI, Université de

100

Generating Tests from UML Specifications Jeff Offutt and Aynur Abdurazik ?  

E-print Network

Generating Tests from UML Specifications Jeff Offutt and Aynur Abdurazik ? George Mason University, Fairfax VA 22030, USA Abstract. Although most industry testing of complex software is con­ ducted at the system level, most formal research has focused on the unit level. As a result, most system level testing

Offutt, Jeff

101

Extending UML with Aspects: Aspect Support in the Design Phase  

Microsoft Academic Search

Aspect-Oriented Programming (AOP) has been considered a promising abstraction principle to reduce the problem of code tangling and make software structure clean and configurable. This paper addresses the aspect support in the design level while it has been focused mainly in the implementation\\/coding phase. We propose an extension to Unified Modeling Language (UML) to support aspects properly without breaking the

Junichi Suzuki; Yoshikazu Yamamoto

1999-01-01

102

Rewriting and suppressing UMLS terms for improved biomedical term identification  

PubMed Central

Background Identification of terms is essential for biomedical text mining.. We concentrate here on the use of vocabularies for term identification, specifically the Unified Medical Language System (UMLS). To make the UMLS more suitable for biomedical text mining we implemented and evaluated nine term rewrite and eight term suppression rules. The rules rely on UMLS properties that have been identified in previous work by others, together with an additional set of new properties discovered by our group during our work with the UMLS. Our work complements the earlier work in that we measure the impact on the number of terms identified by the different rules on a MEDLINE corpus. The number of uniquely identified terms and their frequency in MEDLINE were computed before and after applying the rules. The 50 most frequently found terms together with a sample of 100 randomly selected terms were evaluated for every rule. Results Five of the nine rewrite rules were found to generate additional synonyms and spelling variants that correctly corresponded to the meaning of the original terms and seven out of the eight suppression rules were found to suppress only undesired terms. Using the five rewrite rules that passed our evaluation, we were able to identify 1,117,772 new occurrences of 14,784 rewritten terms in MEDLINE. Without the rewriting, we recognized 651,268 terms belonging to 397,414 concepts; with rewriting, we recognized 666,053 terms belonging to 410,823 concepts, which is an increase of 2.8% in the number of terms and an increase of 3.4% in the number of concepts recognized. Using the seven suppression rules, a total of 257,118 undesired terms were suppressed in the UMLS, notably decreasing its size. 7,397 terms were suppressed in the corpus. Conclusions We recommend applying the five rewrite rules and seven suppression rules that passed our evaluation when the UMLS is to be used for biomedical term identification in MEDLINE. A software tool to apply these rules to the UMLS is freely available at http://biosemantics.org/casper. PMID:20618981

2010-01-01

103

Tree Diagrams and Probability  

NSDL National Science Digital Library

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

2011-01-20

104

Evaluation Methodology for UML and GML Application Schemas Quality  

NASA Astrophysics Data System (ADS)

INSPIRE Directive implementation in Poland has caused the significant increase of interest in making spatial data and services available, particularly among public administration and private institutions. This entailed a series of initiatives that aim to harmonise different spatial data sets, so to ensure their internal logical and semantic coherence. Harmonisation lets to reach the interoperability of spatial databases, then among other things enables joining them together. The process of harmonisation requires either working out new data structures or adjusting existing data structures of spatial databases to INSPIRE guidelines and recommendations. Data structures are described with the use of UML and GML application schemas. Although working out accurate and correct application schemas isn't an easy task. There should be considered many issues, for instance recommendations of ISO 19100 series of Geographic Information Standards, appropriate regulations for given problem or topic, production opportunities and limitations (software, tools). In addition, GML application schema is deeply connected with UML application schema, it should be its translation. Not everything that can be expressed in UML, though can be directly expressed in GML, and this can have significant influence on the spatial data sets interoperability, and thereby the ability to valid data exchange. For these reasons, the capability to examine and estimate UML and GML application schemas quality, therein also the capability to explore their entropy, would be very important. The principal subject of this research is to propose an evaluation methodology for UML and GML application schemas quality prepared in the Head Office of Geodesy and Cartography in Poland within the INSPIRE Directive implementation works.

Chojka, Agnieszka

2014-05-01

105

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

Microsoft Academic Search

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

Kornkamol Jamroendararasame; Tetsuya Suzuki; Takehiro Tokuda

106

Measuring OO Design Metrics from UML  

Microsoft Academic Search

Design metrics are useful means for improving the quality of software. A number of object-oriented metrics have been suggested\\u000a as being helpful for resource allocation in software development. These metrics are particularly useful for identifying fault-prone\\u000a classes and for predicting required maintenance efforts, productivity, and rework efforts. To obtain the design metrics of\\u000a the software under development, most existing approaches

Mei-huei Tang; Mei-hwa Chen

2002-01-01

107

Conceptual Model of Clinical Governance Information System for Statistical Indicators by Using UML in Two Sample Hospitals  

PubMed Central

Objective: The purpose of this study was investigating situation and presenting a conceptual model for clinical governance information system by using UML in two sample hospitals. Background: However, use of information is one of the fundamental components of clinical governance; but unfortunately, it does not pay much attention to information management. Material and Methods: A cross sectional study was conducted in October 2012- May 2013. Data were gathered through questionnaires and interviews in two sample hospitals. Face and content validity of the questionnaire has been confirmed by experts. Data were collected from a pilot hospital and reforms were carried out and Final questionnaire was prepared. Data were analyzed by descriptive statistics and SPSS 16 software. Results: With the scenario derived from questionnaires, UML diagrams are presented by using Rational Rose 7 software. The results showed that 32.14 percent Indicators of the hospitals were calculated. Database was not designed and 100 percent of the hospital’s clinical governance was required to create a database. Conclusion: Clinical governance unit of hospitals to perform its mission, do not have access to all the needed indicators. Defining of Processes and drawing of models and creating of database are essential for designing of information systems. PMID:24825933

Jeddi, Fatemeh Rangraz; Farzandipoor, Mehrdad; Arabfard, Masoud; Hosseini, Azam Haj Mohammad

2014-01-01

108

Aggregating UMLS Semantic Types for Reducing Conceptual Complexity  

PubMed Central

The conceptual complexity of a domain can make it difficult for users of information systems to comprehend and interact with the knowledge embedded in those systems. The Unified Medical Language System® (UMLS) currently integrates over 730,000 biomedical concepts from more than fifty biomedical vocabularies. The UMLS semantic network reduces the complexity of this construct by grouping concepts according to the semantic types that have been assigned to them. For certain purposes, however, an even smaller and coarser-grained set of semantic type groupings may be desirable. In this paper, we discuss our approach to creating such a set. We present six basic principles, and then apply those principles in aggregating the existing 134 semantic types into a set of 15 groupings. We present some of the difficulties we encountered and the consequences of the decisions we have made. We discuss some possible uses of the semantic groups, and we conclude with implications for future work. PMID:11604736

McCray, Alexa T.; Burgun, Anita; Bodenreider, Olivier

2015-01-01

109

MODELING USER INTERFACES WITH THE XIS UML Carlos Martins  

E-print Network

MODELING USER INTERFACES WITH THE XIS UML PROFILE Carlos Martins Universidade da Madeira, Campus da Penteada, Funchal, Portugal carlos.martins@srs.pt Alberto Rodrigues da Silva INESC-ID & Instituto Superior S U A L B A S I C S I L K D E N I M AUIML X I M L U I M L XFORMS W I S D O M U X U M L i OVID U W E

da Silva, Alberto Rodrigues

110

Auto-Coding UML Statecharts for Flight Software  

NASA Technical Reports Server (NTRS)

Statecharts have been used as a means to communicate behaviors in a precise manner between system engineers and software engineers. Hand-translating a statechart to code, as done on some previous space missions, introduces the possibility of errors in the transformation from chart to code. To improve auto-coding, we have developed a process that generates flight code from UML statecharts. Our process is being used for the flight software on the Space Interferometer Mission (SIM).

Benowitz, Edward G; Clark, Ken; Watney, Garth J.

2006-01-01

111

Data Flow Analysis of UML Action Semantics for Executable Models  

Microsoft Academic Search

Executable modeling allows the models to be executed and treated as prototype to determine the behavior of a system. These\\u000a models use precise action languages to specify the algorithms and computational details required for execution. These action\\u000a languages are developed on the basis of UML action semantics metamodel that provides the abstract syntax. The use of a concrete\\u000a action language

Tabinda Waheed; Muhammad Zohaib Z. Iqbal; Zafar I. Malik

2008-01-01

112

UML design for dynamically reconfigurable multiprocessor embedded systems  

Microsoft Academic Search

In this paper we propose a design methodology to explore partial and dynamic reconfiguration of modern FPGAs. We improve an UML based co-design methodology to allow dynamic properties in embedded systems. Our approach targets MPSoPC (Multiprocessor System on Programmable Chip) which allows area optimization through partial reconfiguration without performance penalty. In our case area reduction is achieved by reconfiguring co-processors

Jorgiano Vidal; Florent de Lamotte; Guy Gogniat; Jean-Philippe Diguet; Philippe Soulard

2010-01-01

113

Building Venn Diagrams  

NSDL National Science Digital Library

In this lesson plan students watch a video clip of Bianca as she uses Venn diagrams to try to satisfy three people's preferences in pizza toppings. Students practice using Venn diagrams to represent the pizza topping preferences. Learners are then introduced to prime numbers, prime factorization, and the use of Venn diagrams to determine least common multiple and greatest common factor. Support materials are included: Handout: Gleamers and Glow Power, Assessment: Levels A and B and answer keys are provided.

2007-01-01

114

Effectively processing medical term queries on the UMLS Metathesaurus by layered dynamic programming  

PubMed Central

Background Mapping medical terms to standardized UMLS concepts is a basic step for leveraging biomedical texts in data management and analysis. However, available methods and tools have major limitations in handling queries over the UMLS Metathesaurus that contain inaccurate query terms, which frequently appear in real world applications. Methods To provide a practical solution for this task, we propose a layered dynamic programming mapping (LDPMap) approach, which can efficiently handle these queries. LDPMap uses indexing and two layers of dynamic programming techniques to efficiently map a biomedical term to a UMLS concept. Results Our empirical study shows that LDPMap achieves much faster query speeds than LCS. In comparison to the UMLS Metathesaurus Browser and MetaMap, LDPMap is much more effective in querying the UMLS Metathesaurus for inaccurately spelled medical terms, long medical terms, and medical terms with special characters. Conclusions These results demonstrate that LDPMap is an efficient and effective method for mapping medical terms to the UMLS Metathesaurus. PMID:25079259

2014-01-01

115

Applying AUML and UML 2 in the Multi-agent Systems Project  

Microsoft Academic Search

This article discusses the viability of the AUML and UML languages employment, from the latter’s version 2.0 on, in the multi-agent\\u000a systems project. In this article some works that have used UML for the project of systems that involved agents, as well as\\u000a some AOSE (Agent Oriented Software Engineering) methodologies that use in some way UML or AUML (or both),

Gilleanes Thorwald Araujo Guedes; Rosa Maria Vicari

2009-01-01

116

Industrial communication protocol engineering using UML 2.0: A case study  

Microsoft Academic Search

The advent of Unified Modeling Language version 2.0 (UML 2.0) along with its UML testing profile in the recent years, promises to be a major break through in the field of formal description techniques. Thus in this paper we evaluate the suitability of UML 2.0 combined with its Testing profile for the engineering of industrial communication protocols using a case

Barath Kumar; Juergen Jasperneite

2008-01-01

117

SSBRP Communication & Data System Development using the Unified Modeling Language (UML)  

NASA Technical Reports Server (NTRS)

The Unified Modeling Language (UML) is the standard method for specifying, visualizing, and documenting the artifacts of an object-oriented system under development. UML is the unification of the object-oriented methods developed by Grady Booch and James Rumbaugh, and of the Use Case Model developed by Ivar Jacobson. This paper discusses the application of UML by the Communications and Data Systems (CDS) team to model the ground control and command of the Space Station Biological Research Project (SSBRP) User Operations Facility (UOF). UML is used to define the context of the system, the logical static structure, the life history of objects, and the interactions among objects.

Windrem, May; Picinich, Lou; Givens, John J. (Technical Monitor)

1998-01-01

118

Untangling Euler Diagrams  

Microsoft Academic Search

In many common data analysis scenarios the data elements are logically grouped into sets. Venn and Euler style diagrams are a common visual representation of such set membership where the data elements are represented by labels or glyphs and sets are indicated by boundaries surrounding their members. Generating such diagrams automatically such that set regions do not intersect unless the

Nathalie Henry Riche; Tim Dwyer

2010-01-01

119

Algorithmic phase diagrams  

NASA Technical Reports Server (NTRS)

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.

Hockney, Roger

1987-01-01

120

Class Class Program First  

E-print Network

Class Class Graduation Year Number of First Time Takers Program First Time Taker Pass Rate National First Time Taker Pass Rate for the Class Graduation Year Class of 2012 2012 29 93% 93% Class of 2013;Definitions of Report Headings` Class Class nomenclature and the individuals included in each class

Chisholm, Rex L.

121

How to Interpret Circuit Diagrams  

NSDL National Science Digital Library

This site presents an explanation of how to interpret circuit diagrams. Two diagrams show the difference between a "short hand" circuit diagram and a more detailed one. The detailed circuit diagram is useful for those first learning circuits in an effort to eventually understand the "short hand" diagram without difficulty.

Lesurf, Jim

122

A systematic approach for framework development  

E-print Network

­class citizens. These extensions are defined using the UML extensibility mechanisms: stereotypes, tagged values the variation points of frameworks in UML using static and dynamic description diagrams to capture allowed

Endler, Markus

123

Capturing an Application's Temporal Properties with UML for Real-Time  

E-print Network

, schedulability analysis for real-time applications with an object-oriented design and executed with a deadlineCapturing an Application's Temporal Properties with UML for Real-Time Weiguo He Steve Goddard}@cse.unl.edu Abstract The Unified Modeling Language (UML) is commonly used in the development of non-real-time systems

Goddard, Steve

124

Modeling Networks-on-Chip at System Level with the MARTE UML profile  

E-print Network

concepts for model-based design and analysis of real time and embedded systems. This paper presents a MARTE called UML profile for MARTE (Modeling and Analysis of Real-Time and Embedded systems) specifies some level using a modeling language as UML. The field of real-time embedded software systems is a domain

Paris-Sud XI, Université de

125

Applying UML and XML for designing and interchanging information for data warehouses and OLAP applications  

Microsoft Academic Search

Multidimensional (MD) modeling is the basis for Data warehouses (DW), multidimensional databases (MDB) and On-Line Analytical Processing (OLAP) applications. In this paper, we present how the Unified Modeling Language (UML) can be successfully used to represent both structural and dynamic properties of these systems at the conceptual level. The structure of the system is specified by means of a UML

Juan Trujillo; Sergio Luján-mora; Il-yeol Song

2004-01-01

126

Representing the UMLS as an Object-oriented Database: Modeling Issues and Advantages  

Microsoft Academic Search

ObjectiveThe Unified Medical Language System (UMLS) combines many well-established authoritative medical informatics terminologies in one knowledge representation system. Such a resource is very valuable to the health care community and industry. However, the UMLS is very large and complex and poses serious comprehension problems for users and maintenance personnel. The authors present a representation to support the user's comprehension and

Gu Huanying; Perl Yehoshua; Geller James; Halper Michael; Liu Li-min; Cimino James J

2000-01-01

127

A Metamodel-Based OCL-Compiler for UML and MOF  

Microsoft Academic Search

After becoming part of the UML standard, OCL has been applied successfully in various domains. As a result, requirements to be met by future versions of OCL have evolved. A key requirement is to provide means for the formal integration of OCL and UML. Therefore, the latest proposal for a revised specification of OCL contains a metamodel defining the language

Sten Loecher; Stefan Ocke

2004-01-01

128

MDA-based Approach for Embedded Software Generation from a UML/MOF Repository  

E-print Network

MDA-based Approach for Embedded Software Generation from a UML/MOF Repository 1 Francisco A. M. do Alegre, Brazil cpereira@ece.ufrgs.br ABSTRACT This work presents a UML/MOF meta-modeling infrastructure, following the MDA approach, which is oriented to the design space exploration of embedded systems, based

Wagner, Flávio Rech

129

TURTLE-P : un profil UML pour la validation d'architectures distribues  

E-print Network

TURTLE-P : un profil UML pour la validation d'architectures distribuées L. Apvrille* ---- P. de du Colonel Roche, 31077 Toulouse Cedex 04, France R�SUM�. Le profil TURTLE (Timed UML and RT déterministe, offre limitée dans le temps). L'article propose d'étendre TURTLE dans l'optique d

Khendek, Ferhat

130

Evaluation of the UMLS as a terminology and knowledge resource for biomedical informatics  

Microsoft Academic Search

Objectives : Terminology and knowledge resources are essential components of interoperability among disparate systems. This paper evaluates whether names and relationships needed in biomedical informatics are present in the UMLS. Methods : Terms for five broad categories of concepts were extracted from LocusLink and mapped to the UMLS Metathesausus. Relationships between gene products and the other four categories (phenotype, molecular

Olivier Bodenreider; Joyce A. Mitchell; Alexa T. McCray

131

Digital Sound Recorder: A case study on designing embedded systems using the UML notation  

Microsoft Academic Search

Abstract This document,is an example,of the object-oriented analysis and design of an embedded,system using the Unified Modelling Language (UML). The analysed system is a digital sound recorder, or Dictaphone. The design has been implemented,using an embedded,processor and the C++ programming language. Keywords: object-oriented design, UML, embedded systems. TUCS Research Group

Ivan Porres Paltor; Johan Lilius

132

Design and realize the electromotor choice expert system of sewing machine based on UML  

Microsoft Academic Search

The unified modeling language (UML), which is introduced in this paper, is an important technology about the developing method of object-oriented software. UML can make each component of the large complicated system visualize, then indicate and construct the system model, and build up various documents. This paper, which takes the electromotor choice expert system of sewing machine as an instance,

Chuanhong Zhou; Liang Gao; Zhixue Liu

2009-01-01

133

Experimental Comparison of the Comprehensibility of a UML-based Formal  

E-print Network

Experimental Comparison of the Comprehensibility of a UML-based Formal Specification versus to the required tasks. Formal notation such as B increases a specification's precision and consistency. However of the comprehensibility of a UML-based graphical formal specification versus a purely textual formal specification

Southampton, University of

134

Diagram of Computer Keyboard  

NSDL National Science Digital Library

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

Ward, Charles

2011-01-21

135

Nebraska Astronomy Applet Project: Hertzsprung-Russel Diagram Lab  

NSDL National Science Digital Library

This simulation explores the Hertzsprung-Russell diagram and those topics necessary to understand the diagram. These topics include the different kinds of spectrum, spectral classification, and luminosity class. This module provides a fairly in-depth tutorial in reading HR diagrams. The user can change the temperature and lumonisity of the star and see how its position changes on the HR diagram. Instructor resources are available including student manuals, assessment materials, and a list of the assumptions used. This is part of a collection of astronomy applets.

Lee, Kevin M.

2008-08-21

136

Weyl Card Diagrams  

E-print Network

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

Gregory C. Jones; John E. Wang

2005-06-02

137

A JavaCC Parser for the UML-Based CDIF Transfer Format Patrick Pag Rudolf K. Keller Reinhard Schauer  

E-print Network

-Party Tools UML-CDIF Parser Repository Visitor Source Code & Design Repository (POET, UML 1.1) External Tool represented as UML-based CDIF in our POET object repository [8]. The purpose of this paper is to introduce and discuss the parsing technology we are using for the CDIF Transfer Format. Section 2 details the Java

Keller, Rudolf K.

138

Corpus-based Approach to Creating a Semantic Lexicon for Clinical Research Eligibility Criteria from UMLS.  

PubMed

We describe a corpus-based approach to creating a semantic lexicon using UMLS knowledge sources. We extracted 10,000 sentences from the eligibility criteria sections of clinical trial summaries contained in ClinicalTrials.gov. The UMLS Metathesaurus and SPECIALIST Lexical Tools were used to extract and normalize UMLS recognizable terms. When annotated with Semantic Network types, the corpus had a lexical ambiguity of 1.57 (=total types for unique lexemes / total unique lexemes) and a word occurrence ambiguity of 1.96 (=total type occurrences / total word occurrences). A set of semantic preference rules was developed and applied to completely eliminate ambiguity in semantic type assignment. The lexicon covered 95.95% UMLS-recognizable terms in our corpus. A total of 20 UMLS semantic types, representing about 17% of all the distinct semantic types assigned to corpus lexemes, covered about 80% of the vocabulary of our corpus. PMID:21347142

Luo, Zhihui; Duffy, Robert; Johnson, Stephen; Weng, Chunhua

2010-01-01

139

Corpus-based Approach to Creating a Semantic Lexicon for Clinical Research Eligibility Criteria from UMLS  

PubMed Central

We describe a corpus-based approach to creating a semantic lexicon using UMLS knowledge sources. We extracted 10,000 sentences from the eligibility criteria sections of clinical trial summaries contained in ClinicalTrials.gov. The UMLS Metathesaurus and SPECIALIST Lexical Tools were used to extract and normalize UMLS recognizable terms. When annotated with Semantic Network types, the corpus had a lexical ambiguity of 1.57 (=total types for unique lexemes / total unique lexemes) and a word occurrence ambiguity of 1.96 (=total type occurrences / total word occurrences). A set of semantic preference rules was developed and applied to completely eliminate ambiguity in semantic type assignment. The lexicon covered 95.95% UMLS-recognizable terms in our corpus. A total of 20 UMLS semantic types, representing about 17% of all the distinct semantic types assigned to corpus lexemes, covered about 80% of the vocabulary of our corpus. PMID:21347142

Luo, Zhihui; Duffy, Robert; Johnson, Stephen; Weng, Chunhua

2010-01-01

140

Dependability Modeling and Assessment in UML-Based Software Development  

PubMed Central

Assessment of software nonfunctional properties (NFP) is an important problem in software development. In the context of model-driven development, an emerging approach for the analysis of different NFPs consists of the following steps: (a) to extend the software models with annotations describing the NFP of interest; (b) to transform automatically the annotated software model to the formalism chosen for NFP analysis; (c) to analyze the formal model using existing solvers; (d) to assess the software based on the results and give feedback to designers. Such a modeling?analysis?assessment approach can be applied to any software modeling language, be it general purpose or domain specific. In this paper, we focus on UML-based development and on the dependability NFP, which encompasses reliability, availability, safety, integrity, and maintainability. The paper presents the profile used to extend UML with dependability information, the model transformation to generate a DSPN formal model, and the assessment of the system properties based on the DSPN results. PMID:22988428

Bernardi, Simona; Merseguer, José; Petriu, Dorina C.

2012-01-01

141

Collocation analysis for UMLS knowledge-based word sense disambiguation  

PubMed Central

Background The effectiveness of knowledge-based word sense disambiguation (WSD) approaches depends in part on the information available in the reference knowledge resource. Off the shelf, these resources are not optimized for WSD and might lack terms to model the context properly. In addition, they might include noisy terms which contribute to false positives in the disambiguation results. Methods We analyzed some collocation types which could improve the performance of knowledge-based disambiguation methods. Collocations are obtained by extracting candidate collocations from MEDLINE and then assigning them to one of the senses of an ambiguous word. We performed this assignment either using semantic group profiles or a knowledge-based disambiguation method. In addition to collocations, we used second-order features from a previously implemented approach. Specifically, we measured the effect of these collocations in two knowledge-based WSD methods. The first method, AEC, uses the knowledge from the UMLS to collect examples from MEDLINE which are used to train a Naïve Bayes approach. The second method, MRD, builds a profile for each candidate sense based on the UMLS and compares the profile to the context of the ambiguous word. We have used two WSD test sets which contain disambiguation cases which are mapped to UMLS concepts. The first one, the NLM WSD set, was developed manually by several domain experts and contains words with high frequency occurrence in MEDLINE. The second one, the MSH WSD set, was developed automatically using the MeSH indexing in MEDLINE. It contains a larger set of words and covers a larger number of UMLS semantic types. Results The results indicate an improvement after the use of collocations, although the approaches have different performance depending on the data set. In the NLM WSD set, the improvement is larger for the MRD disambiguation method using second-order features. Assignment of collocations to a candidate sense based on UMLS semantic group profiles is more effective in the AEC method. In the MSH WSD set, the increment in performance is modest for all the methods. Collocations combined with the MRD disambiguation method have the best performance. The MRD disambiguation method and second-order features provide an insignificant change in performance. The AEC disambiguation method gives a modest improvement in performance. Assignment of collocations to a candidate sense based on knowledge-based methods has better performance. Conclusions Collocations improve the performance of knowledge-based disambiguation methods, although results vary depending on the test set and method used. Generally, the AEC method is sensitive to query drift. Using AEC, just a few selected terms provide a large improvement in disambiguation performance. The MRD method handles noisy terms better but requires a larger set of terms to improve performance. PMID:21658291

2011-01-01

142

Class Class Program First  

E-print Network

Class Class Graduation Year Number of First Time Takers Program First Time Taker Pass Rate National First Time Taker Pass Rate for the Class Graduation Year December 2009 2009 35 100% 92% December 2010` Class Class nomenclature and the individuals included in each class are determined by PA programs when

143

Weyl card diagrams  

SciTech Connect

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

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

2005-06-15

144

Minkowski Diagram Model  

NSDL National Science Digital Library

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

Aguirregabiria, Juan

2011-09-09

145

Leveraging the UML Metamodel: Expressing ORM Semantics Using a UML Profile  

SciTech Connect

Object Role Modeling (ORM) techniques produce a detailed domain model from the perspective of the business owner/customer. The typical process begins with a set of simple sentences reflecting facts about the business. The output of the process is a single model representing primarily the persistent information needs of the business. This type of model contains little, if any reference to a targeted computerized implementation. It is a model of business entities not of software classes. Through well-defined procedures, an ORM model can be transformed into a high quality objector relational schema.

CUYLER,DAVID S.

2000-11-01

146

Diblock copolymer phase diagram  

NSDL National Science Digital Library

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

Iacovella, Christopher R.

2006-11-20

147

Dynamic organization of search results using the UMLS.  

PubMed Central

When people search the medical literature, they often are overwhelmed by the large number of documents retrieved. Many systems try to solve this problem by helping the user formulate a more specific search strategy. However, when users do not have a more specific question, they need tools to help them explore and understand the results, rather than to eliminate a portion of those results. This paper describes an approach that addresses this need by automatically grouping the results of a broad search into meaningful categories based on the user's query. This approach combines the main benefit of clustering techniques with the main benefit of classification techniques by taking advantage of the domain knowledge present in the UMLS. I present a preliminary evaluation that demonstrates that a categorization produced by this approach corresponds reasonably well to a physician's categorization. PMID:9357672

Pratt, W.

1997-01-01

148

Carbon Cycle Diagram  

NSDL National Science Digital Library

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

149

Reading Diagrams. Pipefitter.  

ERIC Educational Resources Information Center

Developed by the ABCs of Construction National Workplace Literacy Project, these curriculum materials for the occupational area of pipefitting contain a lesson that deals with reading diagrams. The lesson consists of an objective, instruction, and 10 exercises. Three types of problems are provided in each exercise: "try it,""apply it," and "go…

Greater Baton Rouge Chamber of Commerce, LA.

150

Impulse-Momentum Diagrams  

ERIC Educational Resources Information Center

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

Rosengrant, David

2011-01-01

151

Nonthermal Radio Emission and the HR Diagram  

NASA Technical Reports Server (NTRS)

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

Gibson, D. M.

1985-01-01

152

Simultaneity Spacetime Diagram Model  

NSDL National Science Digital Library

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

Christian, Wolfgang

2010-10-07

153

Applying AUML and UML 2 in the Multi-agent Systems Project  

NASA Astrophysics Data System (ADS)

This article discusses the viability of the AUML and UML languages employment, from the latter's version 2.0 on, in the multi-agent systems project. In this article some works that have used UML for the project of systems that involved agents, as well as some AOSE (Agent Oriented Software Engineering) methodologies that use in some way UML or AUML (or both), are presented. Immediately afterwards the article approaches the AUML language, highlighting the innovations proposed by same and how it can be applied to the multi-agent systems project, identifying its advantages and disadvantages. After that, the paper passes on to describe how UML, from its version 2.0 on, has bypassed AUML and how the former can be applied to the multiagent systems project, pinpointing its positive aspects and its deficiencies.

Guedes, Gilleanes Thorwald Araujo; Vicari, Rosa Maria

154

Carleton University, TR SCE-06-19 Decermber 2006 A UML Profile For Developing  

E-print Network

. Safety assessments are performed in practice, and system certification according to a standard requires, UML Profile, Airworthiness, RTCA DO-178B, Safety, Safety- Critical, Safety Assessment, Certification ............................................................................ 19 2.1 SAFETY ASSESSMENTS

Briand, Lionel C.

155

Component-Based Real-Time Design: Mapping HRT-HOOD to UML  

Microsoft Academic Search

This work reports from a project that transposed the HRT-HOOD design method and development process onto a tailored profile of the UML meta-model. HRT-HOOD has methodological strengths, which make it apt for component-based design of hard real-time systems. The UML meta-model is so flexible and comprehensive that it can express and support specific design methods and processes, without leaning towards

Tullio Vardanega; Marco Di Natale; Silvia Mazzini; Massimo D'alessandro

2004-01-01

156

An Introduction to Tree Diagrams  

NSDL National Science Digital Library

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

Cork, Stu

2014-01-01

157

TEP process flow diagram  

SciTech Connect

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

Wilms, R Scott [Los Alamos National Laboratory; Carlson, Bryan [Los Alamos National Laboratory; Coons, James [Los Alamos National Laboratory; Kubic, William [Los Alamos National Laboratory

2008-01-01

158

Untangling euler diagrams.  

PubMed

In many common data analysis scenarios the data elements are logically grouped into sets. Venn and Euler style diagrams are a common visual representation of such set membership where the data elements are represented by labels or glyphs and sets are indicated by boundaries surrounding their members. Generating such diagrams automatically such that set regions do not intersect unless the corresponding sets have a non-empty intersection is a difficult problem. Further, it may be impossible in some cases if regions are required to be continuous and convex. Several approaches exist to draw such set regions using more complex shapes, however, the resulting diagrams can be difficult to interpret. In this paper we present two novel approaches for simplifying a complex collection of intersecting sets into a strict hierarchy that can be more easily automatically arranged and drawn (Figure 1). In the first approach, we use compact rectangular shapes for drawing each set, attempting to improve the readability of the set intersections. In the second approach, we avoid drawing intersecting set regions by duplicating elements belonging to multiple sets. We compared both of our techniques to the traditional non-convex region technique using five readability tasks. Our results show that the compact rectangular shapes technique was often preferred by experimental subjects even though the use of duplications dramatically improves the accuracy and performance time for most of our tasks. In addition to general set representation our techniques are also applicable to visualization of networks with intersecting clusters of nodes. PMID:20975147

Riche, Nathalie Henry; Dwyer, Tim

2010-01-01

159

Dynamic Weaving of Aspect-Oriented Executable UML Models  

NASA Astrophysics Data System (ADS)

Several efforts have been made to incorporate aspect-oriented abstractions into the modelling level. Several modelling languages have appeared, which are mainly UML extensions that incorporate aspect-oriented constructions (e.g. advices or pointcuts). Although these extensions help to improve the modularisation of software designs, their incorporation makes it more complex to understand how the model works after being composed (e.g. woven). In order to overcome this problem, different aspect-oriented model weavers, such as Motorola WEAVR, AOEM and KerTheme, were proposed. These weavers provide the infrastructure for testing and debugging the models before moving into an implementation. However, these model weavers are static in the sense that aspects cannot be woven and unwoven at run time (i.e. during model execution). Hence, software systems that require dynamic weaving (e.g. adaptive applications) are not properly supported. Reasoning about this kind of application can be more complex due to the intrinsic dynamic nature. The novel contribution of this work is an aspect-oriented dynamic model weaver that can be used for running aspect-oriented models where aspects are woven and unwoven during model execution. These ideas are illustrated using a location-aware intelligent transportation system.

Fuentes, Lidia; Sánchez, Pablo

160

Impact decision support diagrams  

NASA Astrophysics Data System (ADS)

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

Boslough, Mark

2014-10-01

161

Investigational new insulin glargine 300 U/ml has the same metabolism as insulin glargine 100 U/ml  

PubMed Central

Insulin glargine is processed in vivo into soluble 21A-Gly-human insulin (M1), the principal moiety responsible for metabolic effects, and subsequently into M2. This sub-study compared metabolism and metabolite pharmacokinetic (PK) profiles of investigational new insulin glargine U300 (Gla-300) with insulin glargine 100 U/ml (Gla-100, Lantus®, Sanofi-Aventis Deutschland GmbH, Frankfurt am Main, Germany) in people with type 1 diabetes. Participants received 0.4 (n?=?18) or 0.6 U/kg Gla-300 (n?=?12), and 0.4 U/kg Gla-100 (n?=?30) once daily in randomized order for 8 days prior to a 36-h euglycaemic clamp. Metabolites were quantified using immunoaffinity enrichment and liquid chromatography tandem mass spectrometry (LC-MS/MS). Glargine metabolism was the same regardless of Gla-100 or Gla-300 administration; M1 was confirmed as the principal active moiety circulating in blood. Steady state concentrations of M1 were achieved after 2 days for Gla-100, and 4 days for Gla-300. Steady state M1 values defined prolonged and even flatter PK profiles after Gla-300 administration compared with M1 profiles after Gla-100. PMID:24571126

Steinstraesser, A; Schmidt, R; Bergmann, K; Dahmen, R; Becker, R H A

2014-01-01

162

Methods for Exploring the Semantics of the Relationships between Co-occurring UMLS Concepts  

PubMed Central

Objective To characterize the relationships among UMLS concepts that co-occur as MeSH descriptors in MEDLINE citations (1990-1999). Design 18,485 UMLS concepts involved in 7,928,608 directed pairs of co-occurring concepts were studied. For each directed pair of concepts C1-C2: (i) the “family” of C1 was built, using the UMLS Metathesaurus, and we tested whether or not C2 belonged to C1's family; (ii) we used the semantic categorization of Metathesaurus concepts through the UMLS Semantic Network and Semantic Groups to represent the semantics of the relationships between C1 and C2. Results In 6.5% of the directed pairs, the co-occurring concept C2 was found within the “family” of C1. Detailed results are given. The most frequent co-occurrences involved “Chemicals & Drugs” and “Chemicals & Drugs”, as well as “Disorders” and “Chemicals & Drugs”. Discussion This work takes advantage of both symbolic and statistical information represented in the UMLS, and analyzes their overlap. Further research is suggested. PMID:11604727

Burgun, Anita; Bodenreider, Olivier

2015-01-01

163

The semigroup of Betti diagrams  

Microsoft Academic Search

The recent proof of the Boij-Soederberg conjectures reveals new structure\\u000aabout Betti diagrams of modules, giving a complete description of the cone of\\u000aBetti diagrams. We begin to expand on this new structure by investigating the\\u000asemigroup of Betti diagrams. We prove that this semigroup is finitely\\u000agenerated, and we answer several other fundamental questions about this\\u000asemigroup.

Daniel Erman

2009-01-01

164

Time Temperature Transformation (TTT) Diagrams  

E-print Network

TTT diagrams. These are salt bath (Figs. 1- 2) techniques combined with metallography and hardness techniques and thermodynamic predictions. Salt bath technique combined with metallography and hardness

Cambridge, University of

165

2001 Mercury Computer Systems, Inc. UML 2.0 Redux for HPECUML 2.0 Redux for HPEC  

E-print Network

© 2001 Mercury Computer Systems, Inc. UML 2.0 Redux for HPECUML 2.0 Redux for HPEC Dr. Jeffrey E. Smith Mercury Computer Systems, Inc. Manfred Koethe 88solutions Corp. High Performance Embedded Computing (HPEC) Conference September 25, 2003 #12;2© 2003 Mercury Computer Systems, Inc. UML Overview

Kepner, Jeremy

166

Analyzing polysemous concepts from a clinical perspective: Application to auditing concept categorization in the UMLS  

PubMed Central

Objectives Polysemy is a frequent issue in biomedical terminologies. In the Unified Medical Language System (UMLS), polysemous terms are either represented as several independent concepts, or clustered into a single, multiply-categorized concept. The objective of this study is to analyze polysemous concepts in the UMLS through their categorization and hierarchical relations for auditing purposes. Methods We used the association of a concept with multiple Semantic Groups (SGs) as a surrogate for polysemy. We first extracted multi-SG (MSG) concepts from the UMLS Metathesaurus and characterized them in terms of the combinations of SGs with which they are associated. We then clustered MSG concepts in order to identify major types of polysemy. We also analyzed the inheritance of SGs in MSG concepts. Finally, we manually reviewed the categorization of the MSG concepts for auditing purposes. Results The 1208 MSG concepts in the Metathesaurus are associated with 30 distinct pairs of SGs. We created 75 semantically homogeneous clusters of MSG concepts, and 276 MSG concepts could not be clustered for lack of hierarchical relations. The clusters were characterized by the most frequent pairs of semantic types of their constituent MSG concepts. MSG concepts exhibit limited semantic compatibility with their parent and child concepts. A large majority of MSG concepts (92%) are adequately categorized. Examples of miscategorized concepts are presented. Conclusion This work is a systematic analysis and manual review of all concepts categorized by multiple SGs in the UMLS. The correctly-categorized MSG concepts do reflect polysemy in the UMLS Metathesaurus. The analysis of inheritance of SGs proved useful for auditing concept categorization in the UMLS. PMID:19303057

Mougin, Fleur; Bodenreider, Olivier; Burgun, Anita

2015-01-01

167

General Diagram-Recognition Methodologies  

Microsoft Academic Search

The field of diagram recognition faces many challenges, including the great diversity in diagrammatic notations, and the presence of noise and ambiguity during the recognition process. To help address these problems, research is needed into methods for acquiring, representing, and exploiting notational conventions. We review several frameworks for diagram recognition: blackboard systems, schema-based systems, syntactic methods, and graph rewriting. Next

Dorothea Blostein

1995-01-01

168

Force Diagrams: How? and Why?  

ERIC Educational Resources Information Center

Suggests that physics students always have three questions when using force diagrams: (1) Why do I need one? (2) How do I draw one? and (3) How do I find the forces acting on a body? Provides a method to help students find answers to all three questions and understand force diagrams. (MVL)

Newburgh, Ronald

1994-01-01

169

Perturbations to the Hubble diagram  

E-print Network

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

Thomas Schucker; Ilhem ZouZou

2005-11-17

170

Physiology Flow-Diagram Models  

NSDL National Science Digital Library

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

PhD Sandra J Bruner (Polk Community College Biology)

2005-10-04

171

Teaching Tip: Using Activity Diagrams to Model Systems Analysis Techniques: Teaching What We Preach  

ERIC Educational Resources Information Center

Activity diagrams are used in Systems Analysis and Design classes as a visual tool to model the business processes of "as-is" and "to-be" systems. This paper presents the idea of using these same activity diagrams in the classroom to model the actual processes (practices and techniques) of Systems Analysis and Design. This tip…

Lending, Diane; May, Jeffrey

2013-01-01

172

Recognising Sketches of Euler Diagrams Augmented with Graphs Gem Stapleton Aidan Delaney Peter Rodgers Beryl Plimmer  

E-print Network

- sifying strokes as either curve, node, edge, or shading. To evaluate our recognition engine, we asked 10 participants to each sketch six augmented Euler diagrams. Using the re- sults of the study, we fine languages often relies on soft- ware support. For example, in software engineering, class diagrams can

Kent, University of

173

Resummation of Cactus Diagrams in the Clover Improved Lattice Formulation of QCD  

E-print Network

We extend to the clover improved lattice formulation of QCD the resummation of cactus diagrams, i.e. a certain class of tadpole-like gauge invariant diagrams. Cactus resummation yields an improved perturbative expansion. We apply it to the lattice renormalization of some two-fermion operators improving their one-loop perturbative estimates.

H. Panagopoulos; E. Vicari

1998-09-02

174

Resummation of Cactus Diagrams in the Clover Improved Lattice Formulation of QCD  

E-print Network

We extend to the clover improved lattice formulation of QCD the resummation of cactus diagrams, i.e. a certain class of tadpole-like gauge invariant diagrams. Cactus resummation yields an improved perturbative expansion. We apply it to the lattice renormalization of some two-fermion operators improving their one-loop perturbative estimates.

Panagopoulos, H

1999-01-01

175

A UML Package for Specifying Real-Time Objects* Lisa Cingiser DiPippo  

E-print Network

And Constraints) model. The RT-Object package has been used to design real-time objects in a Real-Time Multi that enable system designers to visually model the target system. Real-time systems designers use UML-Object, consisting of real-time object elements that can be used by real-time systems designers to specify a wide

Rhode Island, University of

176

Translating Real-Time UML Timing Constraints into Real-Time Logic Formulas  

E-print Network

and the Institute for Space Systems Operations. #12;1 Translating Real-Time UML Timing Constraints into Real-Time and Albert Mo Kim Cheng Real-Time Systems Laboratory Department of Computer Science University of Houston Modeling, Real-Time Systems, Timing Constraints, Verification, RTL Abstract Real-time software development

Cheng, Albert M. K.

177

Kepler's Laws of Planetary Motion Charles Byrne (Charles Byrne@uml.edu)  

E-print Network

Kepler's Laws of Planetary Motion Charles Byrne (Charles Byrne@uml.edu) Department of Mathematical strong evidence for Newton's law of universal gravitation. 1 Preliminaries Kepler worked from 1601 the sun, is the same constant. These laws, particularly the third one, provided strong evidence for Newton

Byrne, Charles

178

Developing High-Assurance Secure Systems with UML: A Smartcard-based Purchase Protocol  

E-print Network

Developing High-Assurance Secure Systems with UML: A Smartcard-based Purchase Protocol Jan Jurjens #3; Software & Systems Engineering, TU Munchen, Germany Abstract Developing high-assurance security-critical systems is diÃ?cult and there are many well-known examples of security weaknesses exploited in practice

Jurjens, Jan

179

The Graphical Format of TTCN-3 in the Context of MSC and UML  

Microsoft Academic Search

Graphical system design techniques like Message Sequence Chart (MSC) and Unified Modelling Language (UML) are gaining more and more acceptance because they ease the development, understanding, and maintenance of software systems. In the testing area no accepted graphical test specification and implementation techniques exist. To overcome this shortcoming, a graphical presentation format for the Testing and Test Control Notation (GFT)

Ina Schieferdecker; Jens Grabowski

2002-01-01

180

From Contracts to Aspects in UML Designs Jean-Marc Jzquel, and Nol Plouzeau  

E-print Network

occurrences, stereotypes or tag values to add non-functional annotations to a model. In this paper, we explore be implemented. We propose to model contracts in UML with a small set of stereotypes, and to represent aspects of these views has two dimensions, one static and one dynamic. Furthermore the designer can add non- functional

Paris-Sud XI, Université de

181

Dynamic applications on reconfigurable systems: From UML model design to FPGAs implementation  

Microsoft Academic Search

In this paper we propose a design methodology to explore dynamic and partial reconfiguration (DPR) of modern FPGAs. We define a set of rules in order to model DPR by means of UML and design patterns. Our approach targets MPSoPC (Multiprocessor System on Programmable Chip) which allows: a) area optimization through partial reconfiguration without performance penalty and b) increased system

Jorgiano Vidal; Florent de Lamotte; Guy Gogniat; Jean-Philippe Diguet; Sebastien Guillet

2011-01-01

182

Animation of UML-B State-machines Vitaly Savicks, Colin Snook, Michael Butler  

E-print Network

Animation of UML-B State-machines Vitaly Savicks, Colin Snook, Michael Butler University of Southampton, Southampton SO17 1BJ, UK {vs02, cfs, mjb}@ecs.soton.ac.uk Abstract. Animation is important because it allows the modeller to validate that a model behaves as intended. Visualisation of animations

Southampton, University of

183

SYNTONY: Network Protocol Simulation based on Standard-conform UML 2 Models  

E-print Network

and analysis of network protocols. With the help of Syntony we are able to use a simple graphical modelingSYNTONY: Network Protocol Simulation based on Standard-conform UML 2 Models Isabel Dietrich Volker the need for using standardized graphical modeling languages for developing and evaluat- ing simulation

Breu, Ruth

184

Enhancing the UML with Shadows for Agile Development Marc Conrad Marianne Huchard  

E-print Network

Enhancing the UML with Shadows for Agile Development Marc Conrad Marianne Huchard University huchard@lirmm.fr http://www.lirmm.fr/huchard Abstract: Agile methodologies can be enhanced by the use model-driven and agile methodologies. 1 The Shadow Concept Keeping in mind the current trends

Paris-Sud XI, Université de

185

Dynamic power management for UML modeled applications on multiprocessor SoC  

NASA Astrophysics Data System (ADS)

The paper presents a novel scheme of dynamic power management for UML modeled applications that are executed on a multiprocessor System-on-Chip (SoC) in a distributed manner. The UML models for both application and architecture are designed according to a well-defined UML profile for embedded system design, called TUT-Profile. Application processes are considered as elementary units of distributed execution, and their mapping on a multiprocessor SoC can be dynamically changed at run-time. Our approach on the dynamic power management balances utilized processor resources against current workload at runtime by (1) observing the processor and workload statistics, (2) re-evaluating the amount of required resources (i.e. the number of active processors), and (3) re-mapping the application processes to the minimum set of active processors. The inactive processors are set to a power-save state by using clock-gating. The approach integrates the well-known power management techniques tightly with the UML based design of embedded systems in a novel way. We evaluated the dynamic power management with a WLAN terminal implemented on a multiprocessor SoC on Altera Stratix II FPGA containing up to five Nios II processors and dedicated hardware accelerators. Measurements proved up to 21% savings in the power consumption of the whole FPGA board.

Kukkala, Petri; Arpinen, Tero; Setälä, Mikko; Hännikäinen, Marko; Hämäläinen, Timo D.

2007-02-01

186

Harmony: An Environment for the Combined Use of UML and Z++ in Software Specification  

E-print Network

-oriented modeling, formal specification, integration of notations, UML, Z++. 1 Introduction The proposal, graphical (in this paper we refer specifically to semi-formal graphical notations) and, respectively, formal of time-constrained systems via synergetic use of formality and visualization in software specification

Dascalu, Sergiu

187

Planar diagrams from optimization  

E-print Network

We propose a new toy model of a heteropolymer chain capable of forming planar secondary structures typical for RNA molecules. In this model the sequential intervals between neighboring monomers along a chain are considered as quenched random variables. Using the optimization procedure for a special class of concave--type potentials, borrowed from optimal transport analysis, we derive the local difference equation for the ground state free energy of the chain with the planar (RNA--like) architecture of paired links. We consider various distribution functions of intervals between neighboring monomers (truncated Gaussian and scale--free) and demonstrate the existence of a topological crossover from sequential to essentially embedded (nested) configurations of paired links.

S. K. Nechaev; A. N. Sobolevski; O. V. Valba

2012-03-15

188

The Hertzsprung-Russell Diagram.  

ERIC Educational Resources Information Center

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

Woodrow, Janice

1991-01-01

189

Resummation of Cactus Diagrams in Lattice QCD, to all Orders  

E-print Network

We show how to perform a resummation, to all orders in perturbation theory, of a certain class of gauge invariant tadpole-like diagrams in Lattice QCD. These diagrams are often largely responsible for lattice artifacts. Our resummation leads to an improved perturbative expansion. Applied to a number of cases of interest, e.g. the lattice renormalization of some two-fermion operators, this expansion yields results remarkably close to corresponding nonperturbative estimates. We consider in our study both the Wilson and the clover action for fermions.

H. Panagopoulos; E. Vicari

1999-09-08

190

Resummation of Cactus Diagrams in Lattice QCD, to all Orders  

E-print Network

We show how to perform a resummation, to all orders in perturbation theory, of a certain class of gauge invariant tadpole-like diagrams in Lattice QCD. These diagrams are often largely responsible for lattice artifacts. Our resummation leads to an improved perturbative expansion. Applied to a number of cases of interest, e.g. the lattice renormalization of some two-fermion operators, this expansion yields results remarkably close to corresponding nonperturbative estimates. We consider in our study both the Wilson and the clover action for fermions.

Panagopoulos, H

2000-01-01

191

Exam Object-Oriented Programming, 2 July 2003 Name: Studienkz. Matrikelnummer  

E-print Network

Stack empty() : Boolean push() pop() Figure 1: UML Diagram for stacks. The #12;rst three subquestions-oriented design for the elevator bank. You do not need to show the analysis, nor code. Show a UML class diagram; and the body of main(). You m

192

Measuring system and software architecture complexity  

Microsoft Academic Search

Conventional measures of software code complexity, specifically code length, Halstead difficulty: and McCahe cyclomatic complexity, are adapted to measure architecture complexity. These measures are applied to architecture models based on Unified Modeling Language (UML) class, sequence, and state diagrams by redefming measure factors in terms of UML elements. This approach is illustrated using architecture diagrams Gom a real-time communication control

Jeff Lankford; Galileo Galilei

2003-01-01

193

Fast Formal Analysis of Requirements via "Topoi Diagrams"  

NASA Technical Reports Server (NTRS)

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

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

2001-01-01

194

MAST Real-Time View: A Graphic UML Tool for Modeling Object-Oriented Real-Time System  

Microsoft Academic Search

This paper describes a methodology and a framework for building an analyzable real-time model of an object-oriented system that is developed using a UML CASE tool. The real-time model is formulated by a new UML view named "MAST RT View". This view allows the designer to gradually build the real-time model according to the phase of the development process, to

Julio L. Medina Pasaje; Michael González Harbour; José M. Drake

2001-01-01

195

A Component-Based UML Profile to Model Embedded Real-Time Systems Designed by the MDA Approach  

Microsoft Academic Search

A component-based UML profile is built to develop embedded real-time systems. To specify the specific characteristics of embedded systems, the model driven architecture (MDA) approach and component-based modeling are employed. Component-based UML models are designed as Platform Independent Models (PIM) to be translated to platform specific models (PSM) for target-platform implementation, which deal with functional and non-functional properties. Taking specific

Shourong Lu; Wolfgang A. Halang; Lichen Zhang

2005-01-01

196

Combining Image Features, Case Descriptions and UMLS Concepts to Improve Retrieval of Medical Images  

PubMed Central

This paper evaluates a system, UBMedTIRS, for retrieval of medical images. The system uses a combination of image and text features as well as mapping of free text to UMLS concepts. UBMedTIRS combines three publicly available tools: a content-based image retrieval system (GIFT), a text retrieval system (SMART), and a tool for mapping free text to UMLS concepts (MetaMap). The system is evaluated using the ImageCLEFmed 2005 collection that contains approximately 50,000 medical images with associated text descriptions in English, French and German. Our experimental results indicate that the proposed approach yields significant improvements in retrieval performance. Our system performs 156% above the GIFT system and 42% above the text retrieval system. PMID:17238426

Ruiz, Miguel E.

2006-01-01

197

NAAP HR Diagram Explorer 1/9 HR Diagram Student Guide  

E-print Network

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

Farritor, Shane

198

An approach to schedulability analysis of UML-based real-time systems design  

Microsoft Academic Search

This paper presents an approach to analyzing the timing and schedulability performance of a system model designed with the Unified Modeling Language (UML). As demand grows for a better way of developing complex real-time (RT) software systems, object-oriented modeling and design has recently gained popularity in real-time circles. However, due to the timing constraints in RT systems, appropriate approaches are

Dongxi Jin; David C. Levy

2002-01-01

199

UML-Executable Functional Models of electronic systems in the VIPERS Virtual Prototyping Methodology  

Microsoft Academic Search

This paper presents the use of UML-Executable Functional Models (UMLEFM) in the context of the ViPERS virtual prototyping methodology [tikyaLister et al., 2004a, Lister et al., 2004b] for System-on-Chip design. The concepts, the implementation and the experiments presented in this paper were developed at the University of Sussex (UoS) in the Centre of VLSI and Computer Graphics as part of

Paul F. Lister; Vincenzo Trignano; Milke C. Bassett; P. Watten

2004-01-01

200

Relating UMLS semantic types and task-based ontology to computer-interpretable clinical practice guidelines.  

PubMed

Medical knowledge in clinical practice guideline (GL) texts is the source of task-based computer-interpretable clinical guideline models (CIGMs). We have used Unified Medical Language System (UMLS) semantic types (STs) to understand the percentage of GL text which belongs to a particular ST. We also use UMLS semantic network together with the CIGM-specific ontology to derive a semantic meaning behind the GL text. In order to achieve this objective, we took nine GL texts from the National Guideline Clearinghouse (NGC) and marked up the text dealing with a particular ST. The STs we took into consideration were restricted taking into account the requirements of a task-based CIGM. We used DARPA Agent Markup Language and Ontology Inference Layer (DAML + OIL) to create the UMLS and CIGM specific semantic network. For the latter, as a bench test, we used the 1999 WHO-International Society of Hypertension Guidelines for the Management of Hypertension. We took into consideration the UMLS STs closest to the clinical tasks. The percentage of the GL text dealing with the ST "Health Care Activity" and subtypes "Laboratory Procedure", "Diagnostic Procedure" and "Therapeutic or Preventive Procedure" were measured. The parts of text belonging to other STs or comments were separated. A mapping of terms belonging to other STs was done to the STs under "HCA" for representation in DAML + OIL. As a result, we found that the three STs under "HCA" were the predominant STs present in the GL text. In cases where the terms of related STs existed, they were mapped into one of the three STs. The DAML + OIL representation was able to describe the hierarchy in task-based CIGMs. To conclude, we understood that the three STs could be used to represent the semantic network of the task-bases CIGMs. We identified some mapping operators which could be used for the mapping of other STs into these. PMID:14664031

Kumar, Anand; Ciccarese, Paolo; Quaglini, Silvana; Stefanelli, Mario; Caffi, Ezio; Boiocchi, Lorenzo

2003-01-01

201

Function Net Modeling with UML-RT: Experiences from an Automotive Project at BMW Group  

Microsoft Academic Search

\\u000a This paper presents the function net modeling approach that has been developed within an automotive project at BMW Group aimed at software development for electronic control\\u000a units. This modeling approach provides a graphical, quite abstract representation of a (typically large) set of functions\\u000a to be realized in software or hardware. Function net models are described in UML-RT, a dialect of

Michael Von Der Beeck

2004-01-01

202

Topology of surface diagrams of smooth 4-manifolds  

PubMed Central

Surface diagrams are a new way to specify any smooth closed orientable 4-manifold by an orientable surface decorated with simple closed curves. These curves are cyclically indexed, and each curve has a unique transverse intersection with the next. The aim of this paper is to announce a uniqueness theorem for these objects (within a fixed homotopy class) that turns out to be similar to the Reidemeister-Singer theorem for Heegaard splittings of 3-manifolds. PMID:21518896

Williams, Jonathan D.

2011-01-01

203

Index of Animated Phase Diagrams  

NSDL National Science Digital Library

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

Windom, Kenneth E.; University, Iowa S.

204

Voronoi Diagrams and Spring Rain  

ERIC Educational Resources Information Center

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

Perham, Arnold E.; Perham, Faustine L.

2011-01-01

205

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

206

INCONEL 718: A solidification diagram  

Microsoft Academic Search

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

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

1989-01-01

207

Class Pricing  

E-print Network

A contract with K-class pricing divides a large set of goods or services into K classes and assigns a single price to any element of a class. Class pricing can be efficient when several different versions may be traded and ...

Wernerfelt, Birger

2008-01-15

208

INCONEL 718: A solidification diagram  

NASA Astrophysics Data System (ADS)

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

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

1989-10-01

209

Causal diagrams in systems epidemiology  

PubMed Central

Methods of diagrammatic modelling have been greatly developed in the past two decades. Outside the context of infectious diseases, systematic use of diagrams in epidemiology has been mainly confined to the analysis of a single link: that between a disease outcome and its proximal determinant(s). Transmitted causes ("causes of causes") tend not to be systematically analysed. The infectious disease epidemiology modelling tradition models the human population in its environment, typically with the exposure-health relationship and the determinants of exposure being considered at individual and group/ecological levels, respectively. Some properties of the resulting systems are quite general, and are seen in unrelated contexts such as biochemical pathways. Confining analysis to a single link misses the opportunity to discover such properties. The structure of a causal diagram is derived from knowledge about how the world works, as well as from statistical evidence. A single diagram can be used to characterise a whole research area, not just a single analysis - although this depends on the degree of consistency of the causal relationships between different populations - and can therefore be used to integrate multiple datasets. Additional advantages of system-wide models include: the use of instrumental variables - now emerging as an important technique in epidemiology in the context of mendelian randomisation, but under-used in the exploitation of "natural experiments"; the explicit use of change models, which have advantages with respect to inferring causation; and in the detection and elucidation of feedback. PMID:22429606

2012-01-01

210

On hooks of Young diagrams Christine Bessenrodt  

E-print Network

On hooks of Young diagrams Christine Bessenrodt Fakult¨at f¨ur Mathematik Otto re­ movable box for a Young diagram is generalized to arbitrary hooks. As an application originated from a conjecture by Regev and Vershik on hook num­ bers in certain skew Young diagrams, described

Bessenrodt, Christine

211

Simula Technical Report 2005-14 and Carleton Technical Report SCE-05-11, Version 2 The Impact of UML Documentation on Software  

E-print Network

of UML Documentation on Software Maintenance: An Experimental Evaluation Erik Arisholm§ , Lionel C experiments, spanning across two locations, which investigate the impact of UML documentation on software of the system being changed. This is why documenting software specifications and designs often has been

Carleton University

212

The Two-Loop Ladder Diagram and Representations of U(2,2)  

E-print Network

Feynman diagrams are a pictorial way of describing integrals predicting possible outcomes of interactions of subatomic particles in the context of quantum field physics. It is highly desirable to have an intrinsic mathematical interpretation of Feynman diagrams, and in this article we find the representation-theoretic meaning of a particular kind of Feynman diagrams called the two-loop ladder diagram. This is done in the context of representations of a Lie group U(2,2), its Lie algebra u(2,2) and quaternionic analysis. For the one-loop ladder diagram it was done in [FL1]. Then in [FL1,FL3] we describe a similar representation-quaternionic interpretation for the vacuum polarization diagram. In [L], methods developed in this article will be applied to provide a mathematical interpretation of all conformal four-point integrals. It is reasonable to expect that an even larger class of Feynman diagrams can be interpreted in the same context. No prior knowledge of physics or Feynman diagrams is assumed from the reader. We provide a summary of all relevant results from quaternionic analysis to make the article self-contained.

Matvei Libine

2014-06-26

213

Community detection by graph Voronoi diagrams  

NASA Astrophysics Data System (ADS)

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

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

2014-06-01

214

Method for mapping the French CCAM terminology to the UMLS metathesaurus.  

PubMed

The French coding system of surgical procedures, the Classification Commune des Actes Médicaux (CCAM), is used in France for DRG databases and fee for services payment. Mapping between CCAM and other clinical procedures terminologies by the means of UMLS metathesaurus is essential in order to increase semantic interoperability between different healthcare terminologies and between different case mix systems. In a previous work the CISMeF team used an automatic approach to map CCAM descriptors to the French part of the UMLS metathesaurus. In another way for the French funded research project InterSTIS, we performed a mapping using MetaMap based on the top level semantic structure descriptors of anatomy and action of CCAM translated from French to English. This paper aims to present this new approach and to compare the results with the previous one. The combination of both approaches significantly improved the coverage of the mapping to 68 % for both descriptors and 95 % for at least one descriptor. PMID:22874173

Bousquet, Cédric; Souvignet, Julien; Merabti, Tayeb; Sadou, Eric; Trombert, Béatrice; Rodrigues, Jean-Marie

2012-01-01

215

A layout algorithm for data flow diagrams  

SciTech Connect

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

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

1986-04-01

216

Variable stars across the observational HR diagram  

Microsoft Academic Search

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

Laurent Eyer; Nami Mowlavi

2008-01-01

217

Hubble's diagram and cosmic expansion  

PubMed Central

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

Kirshner, Robert P.

2004-01-01

218

Phase diagrams for DNA crystallization systems.  

PubMed

Phase diagrams for several oligonucleotide duplex-spermine systems have been constructed. These diagrams characterize the duplex and spermine concentrations ranges in which crystalline precipitates are formed. All of them are wedge-like form. The slope of the upper branch of the diagram is determined by the oligonucleotide length. The position of the lower branch depends on both the nucleotide sequence and its length. The position of the lower branch depends on both the nucleotide sequence and its length. It has been shown that the addition to the system of MgCl2 and NaCl salts and MPD results in specific changes in the diagrams. A model for oligonucleotide duplex-spermine system has been suggested which explains the main characteristic features of the obtained phase diagrams. The experimental phase diagrams for the (pGpT)n (pApC)n-spermine system (n = 2,3,4) have been analyzed ion terms of this model and the values of the binding constants of spermine and Mg2+ ions binding to duplexes have been determined. It permitted to identify the complexes that precipitated in different regions of the phase diagrams under various conditions. The diagram obtained in the presence of a cobalt hexammine counterion is also considered. It has been shown that this phase diagram, in general, is similar to those obtained for the oligonucleotide duplex-spermine system. PMID:3271481

Malinina, L V; Makhaldiani, V V; Tereshko, V A; Zarytova, V F; Ivanova, E M

1987-10-01

219

Variable stars across the observational HR diagram  

E-print Network

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

Laurent Eyer; Nami Mowlavi

2007-12-21

220

Hofstadter Butterfly Diagram in Noncommutative Space  

E-print Network

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.

Hidenori Takahashi; Masanori Yamanaka

2006-06-23

221

UML 2.0 Components and Fractal: An Analysis Vladimir Mencl1,2, Matej Polak2  

E-print Network

UML 2.0 Components and Fractal: An Analysis Vladimir Mencl1,2, Matej Polak2 1United Nations of Software Engineering Malostranske namesti 25, 118 00 Prague, Czech Republic {mencl in the selected component models Fractal [1] and SOFA [4]. In Sect. 2, we briefly introduce the relevant key fea

222

Using the UMLS Semantic Network as a Basis for Constructing a Terminological Knowledge Base: A Preliminary Report  

E-print Network

the UMLS Semantic Network [2, 3] as an ontology for the knowledge base of a patient education system. INTRODUCTION We are involved in a research effort whose goal is to improve patient compliance by better edu, and interviews with physicians. The pa­ tient education system provides a tailored, interac­ tive patient handout

Moore, Johanna D.

223

Global phase diagram of two-dimensional Dirac fermions in random potentials  

NASA Astrophysics Data System (ADS)

Anderson localization is studied for two flavors of massless Dirac fermions in two-dimensional space perturbed by static disorder that is invariant under a chiral symmetry (chS) and a time-reversal symmetry (TRS) operation which, when squared, is equal either to plus or minus the identity. The former TRS (symmetry class BDI) can, for example, be realized when the Dirac fermions emerge from spinless fermions hopping on a two-dimensional lattice with a linear energy dispersion such as the honeycomb lattice (graphene) or the square lattice with ? flux per plaquette. The latter TRS is realized by the surface states of three-dimensional Z2-topological band insulators in symmetry class CII. In the phase diagram parametrized by the disorder strengths, there is an infrared stable line of critical points for both symmetry classes BDI and CII. Here we discuss a “global phase diagram” in which disordered Dirac fermion systems in all three chiral symmetry classes, AIII, CII, and BDI, occur in four quadrants, sharing one corner which represents the clean Dirac fermion limit. This phase diagram also includes symmetry classes AII [e.g., appearing at the surface of a disordered three-dimensional Z2-topological band insulator in the spin-orbit (symplectic) symmetry class] and D (e.g., the random bond Ising model in two dimensions) as boundaries separating regions of the phase diagram belonging to the three chS classes AIII, BDI, and CII. Moreover, we argue that physics of Anderson localization in the CII phase can be presented in terms of a non-linear-? model (NL?M) with a Z2-topological term. We thereby complete the derivation of topological or Wess-Zumino-Novikov-Witten terms in the NL?M description of disordered fermionic models in all ten symmetry classes relevant to Anderson localization in two spatial dimensions.

Ryu, S.; Mudry, C.; Ludwig, A. W. W.; Furusaki, A.

2012-06-01

224

On hooks of skew Young diagrams and bars in shifted diagrams  

E-print Network

1 On hooks of skew Young diagrams and bars in shifted diagrams Christine Bessenrodt Fakultat f;ectiveness of the methods introduced in [1] we investi- gate hooks in skew Young diagrams and bars in shifted combinatorial proofs for re#12;ned identities on multisets of hooks in the case of shift-symmetric partitions. 1

Bessenrodt, Christine

225

The HR diagram of the Large Magellanic Cloud and implications for stellar evolution  

Microsoft Academic Search

An H-R diagram for the Large Magellanic Cloud is produced using a sample of 1375 normal spectral class O through G supergiants. The definition of normal includes all O stars that fit into the standard two-dimensional spectral classification framework and all later type stars that do not exhibit optical emission lines. The upper luminosity limit observed for this sample agrees

Edward L. Fitzpatrick; Catharine D. Garmany

1990-01-01

226

NETWORKS OF LAW ENCODING DIAGRAMS FOR UNDERSTANDING Peter C-H. Cheng  

E-print Network

considers a novel class of representations for science instruction -- Law Encoding Diagrams (LEDs of schemas has been proposed to characterizes problem solving and learning with LEDs. How the framework learning environments based on LEDs are considered. Cheng, P. C.-H. (1999). Networks of Law Encoding

Cheng, Peter

227

Usability of expressive description logics--a case study in UMLS.  

PubMed Central

Research in (medical) terminological knowledge representation is showing an increased interest in the family of Description Logics (DLs), as they allow for automatic reasoning. This interest is driven by an increase in demands on the quality of and reasoning ability with medical terminological knowledge. Recent advances in Computer Science have demonstrated the computational decidability and empirical tractability of quite expressive DLs. The question arises whether this expressivity is usable and useful. This paper motivates and describes an exploratory study to address this question by examining the surplus value of individual DL constructors based on an investigation of UMLS terms. Our study indicates that the disjunction and negation operators comprise very valuable extensions to current DLs. The impact of formalization depends on the involved semantic type; "Injury and Poisoning" is one of the semantic types in which a large portion of concepts will benefit from the extension. PMID:12463811

Cornet, R.; Abu-Hanna, A.

2002-01-01

228

Automatic acquisition of synonyms from French UMLS for enhanced search of EHRs.  

PubMed

Currently, the use of Natural Language Processing (NLP) approaches in order to improve search and exploration of electronic health records (EHRs) within healthcare information systems is not a common practice. One reason for this is the lack of suitable lexical resources: various types of such resources need to be collected or acquired. In this work, we propose a novel method for the acquisition of synonymous resources. This method is language-independent and relies on existence of structured terminologies. It enables to decipher hidden synonymous relations between simple words and terms on the basis of their syntactic analysis and exploitation of their compositionality. Applied to series of synonym terms from the French subset of the UMLS, the method shows 99% precision. The overlap between thus inferred terms and the existing sparse resources of synonyms is very low. PMID:18487831

Grabar, Natalia; Varoutas, Paul-Christophe; Rizand, Philippe; Livartowski, Alain; Hamon, Thierry

2008-01-01

229

Projections in Venn-Euler Diagrams  

Microsoft Academic Search

Venn diagrams and Euler circles have long been used to express constraints on sets and their relationships with other sets. However, these notations can get very cluttered when we consider many closed curves or contours. In order to reduce this clutter, and to focus attention within the diagram appropriately, the notion of a projected contour, or projection, is introduced. Informally,

Joseph Gil; John Howse; Stuart Kent; John Taylor

2000-01-01

230

THE QCD PHASE DIAGRAM AT FINITE DENSITY.  

SciTech Connect

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

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

2005-07-25

231

Shear and Moment Diagrams with a Microcomputer.  

ERIC Educational Resources Information Center

Describes an Applesoft computer program which determines the shear and moment diagrams for any combination of four different load configurations on a simply supported beam. Examples of different load configurations and the diagrams produced are included. Also included is the program listing. (JN)

Wallace, John S.

1984-01-01

232

Myopic Value of Information in Influence Diagrams  

Microsoft Academic Search

We present a method for calculation of myopicvalue of information in influence diagrams(Howard & Matheson, 1981) based onthe strong junction tree framework (Jensenet al., 1994) .An influence diagram specifies a certain orderof observations and decisions through itsstructure. This order is reflected in the correspondingjunction trees by the order in whichthe nodes are marginalized. This order ofmarginalization can be changed by

Søren L. Dittmer; Finn Verner Jensen

1997-01-01

233

Phase Diagrams for Traffics on the Crossroad  

NASA Astrophysics Data System (ADS)

The traffic flows on two one-lane roads, crossing at a point, are studied on the basis of the local occupation probability method. The phase diagrams are constructed for the cases of various maximum car velocities. It has turned out that the phase diagrams consist essentailly of five regions.

Ishibashi, Yoshihiro; Fukui, Minoru

2001-09-01

234

The QCD phase diagram at finite density  

E-print Network

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

Christian Schmidt; Zoltan Fodor; Sandor Katz

2005-10-18

235

HertzsprungâRussell (H-R) Diagrams  

NSDL National Science Digital Library

The HertzsprungâRussell (H-R) Diagrams model simulates HertzsprungâRussell (HR or H-R) diagram for groups of stars. The diagram is a scatter plot of steller luminosity vs. stellar temperature. The luminosity of stars is proportional to the star's radius squared and its temperature to the fourth power, and for Main Sequence stars, their luminosity is also proportional to their mass to the 3.5 power. Since the range of stellar luminosities and stellar temperatures is so large, the plot uses a log-log scale. The diagram is a way to understand stellar evolution. The HR diagram shows nearby stars, bright stars, and a user-defined star. One can also show the blackbody radiation curve and the user-defined star. The radius of the user-defined star (in Rsun) and the temperature of the user-defined star in Kelvin (5780 K is Tsun) can be changed.

Belloni, Mario

2010-11-11

236

Phase diagram of ammonium nitrate  

SciTech Connect

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

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

2013-12-07

237

The Amplituhedron from Momentum Twistor Diagrams  

E-print Network

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

Yuntao Bai; Song He

2014-08-11

238

Symmetry Classes  

E-print Network

Physical systems exhibiting stochastic or chaotic behavior are often amenable to treatment by random matrix models. In deciding on a good choice of model, random matrix physics is constrained and guided by symmetry considerations. The notion of 'symmetry class' (not to be confused with 'universality class') expresses the relevance of symmetries as an organizational principle. Dyson, in his 1962 paper referred to as the Threefold Way, gave the prime classification of random matrix ensembles based on a quantum mechanical setting with symmetries. In this article we review Dyson's Threefold Way from a modern perspective. We then describe a minimal extension of Dyson's setting to incorporate the physics of chiral Dirac fermions and disordered superconductors. In this minimally extended setting, where Hilbert space is replaced by Fock space equipped with the anti-unitary operation of particle-hole conjugation, symmetry classes are in one-to-one correspondence with the large families of Riemannian symmetric spaces.

Martin R. Zirnbauer

2010-01-05

239

CUDD: CU Decision Diagram Package Release 2.2.0  

Microsoft Academic Search

The CUDD package provides functions to manipulate Binary Decision Diagrams (BDDs) [5,3], Algebraic Decision Diagrams (ADDs) [1], and Zero suppressed Decision Diagrams (ZDDs) [12]. BDDs are used to represent switch functions

Fabio Somenzi

1998-01-01

240

An Improved Mnemonic Diagram for Thermodynamic Relationships.  

ERIC Educational Resources Information Center

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

Rodriguez, Joaquin; Brainard, Alan J.

1989-01-01

241

Sloan Digital Sky Survey - Hubble Diagram  

NSDL National Science Digital Library

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

2010-01-07

242

A Smart Thermal Block Diagram Tool  

NASA Technical Reports Server (NTRS)

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

Tsuyuki, Glenn; Miyake, Robert; Dodge, Kyle

2008-01-01

243

The Art of Free-Body Diagrams.  

ERIC Educational Resources Information Center

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

Puri, Avinash

1996-01-01

244

Pharmaceutical salt formation guided by phase diagrams.  

E-print Network

??Salt formation is frequently employed to improve the solubility and bioavailability of pharmaceutical compounds. Solid-Liquid-Equilibrium (SLE) phase diagram that serves as the foundation for designing… (more)

Lam, Ka Wing

2009-01-01

245

Voronoi diagram generation on the ellipsoidal earth  

NASA Astrophysics Data System (ADS)

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

Hu, Hai; Liu, XiaoHang; Hu, Peng

2014-12-01

246

Architecture flow diagrams under teamwork reg sign  

SciTech Connect

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

Nicinski, T.

1992-02-01

247

Prevalence of Ovarian Cancer among Women with a CA125 Level of 35 U\\/ml or Less  

Microsoft Academic Search

Background: The optimal upper limit of the normal range for CA125 in ovarian cancer screening is unknown. We investigated the prevalence of ovarian cancer among women in the Shizuoka Cohort Study on Ovarian Cancer Screening (SCSOCS) trial who had an abnormal ultrasound (US) and a CA125 level of 35 U\\/ml or less. Methods: Of 48,027 women enrolled in the SCSOCS

Hiroshi Kobayashi; Yoshihiko Yamada; Toshiyuki Sado; Mariko Sakata; Shozo Yoshida; Ryuji Kawaguchi; Seiji Kanayama; Hiroshi Shigetomi; Shoji Haruta; Yoriko Tsuji; Sachiyo Ueda; Takashi Kitanaka; Hidekazu Oi

2008-01-01

248

Algebraic decision diagrams and their applications  

Microsoft Academic Search

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

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

1993-01-01

249

Implications of Cladistics: Understanding Branching Diagrams  

NSDL National Science Digital Library

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

250

ISS EPS Orbital Replacement Unit Block Diagrams  

NASA Technical Reports Server (NTRS)

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

Schmitz, Gregory V.

2001-01-01

251

Elementary diagrams in nuclear and neutron matter  

SciTech Connect

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

Wiringa, R.B.

1995-08-01

252

Fluctuations and the QCD phase diagram  

SciTech Connect

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

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

2012-06-15

253

The plutonium-oxygen phase diagram  

Microsoft Academic Search

Identification of products formed by the reaction of plutonium metal with liquid water at 23°C indicates that the plutonium-oxygen phase diagram is similar to the cerium-oxygen and praseodymium-oxygen diagrams. Quantitative measurements of Hâ formation and analytical data suggest that a sequence of hydrolysis reactions produces oxide hydrides of trivalent plutonium, PuâOâ, mixed-valent oxides and PuOâ. The intermediate oxides are the

Haschke

1990-01-01

254

Steps toward a radio HR diagram  

Microsoft Academic Search

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

Frazer Owen

255

The effects of Roundhouse diagram construction and use on meaningful science learning in the middle school classroom  

NASA Astrophysics Data System (ADS)

This research explored the effects of Roundhouse diagram construction and use on meaningful learning of science concepts in a 6th-grade science classroom. This investigation examined the transformation of students' science concepts as they became more proficient in constructing Roundhouse diagrams, what problems students encountered while constructing Roundhouse diagrams, and how choices of iconic images affected their progress in meaningfully learning science concepts as they constructed a series of Roundhouse diagrams. The process of constructing a Roundhouse diagram involved recognizing the learner's relevant existing concepts, evaluating the central concepts for a science lesson and breaking them down into their component parts, reconstructing the learner's conceptual framework by reducing the amount of detail efficiently, reviewing the reconstruction process, and linking each key concept to an iconic image. The researcher collected and analyzed qualitative and quantitative data to determine the effectiveness of the Roundhouse diagram. Data included field notes, observations, students' responses to Roundhouse diagram worksheets, students' perceptions from evaluation sheets, students' mastery of technique sheets, tapes and transcripts of students' interviews, student-constructed Roundhouse diagrams, and documentation of science grades both pre- and post-Roundhouse diagramming. This multiple case study focused on six students although the whole class was used for statistical purposes. Stratified purposeful sampling was used to facilitate comparisons as well as week-by-week comparisons of students' science grades and Roundhouse diagram scores to gain additional insight into the effectiveness of the Roundhouse diagramming method. Through participation in constructing a series of Roundhouse diagrams, middle school students gained a greater understanding of science concepts. Roundhouse diagram scores improved over time during the 10-week Roundhouse diagramming session. Students' science scores improved as they became more proficient in constructing the Roundhouse diagrams. The major problems associated with constructing Roundhouse diagrams were extracting the main ideas from the textbook, understanding science concepts in terms of whole/part relationships, paraphrasing sentences effectively, and sequencing events in an accurate order. A positive relationship existed for the case study group based on students' choices and drawings of iconic images and the meaningful learning of science concepts.

Ward, Robin Eichel

256

Defining Classes  

Microsoft Academic Search

\\u000a The final chapter draws the reader into defining classes. With this knowledge they are ready to build applications that combine\\u000a Tkinter widgets with turtle graphics screens through the use of inheritance. It turns out that a turtle graphics screen is\\u000a just another Tkinter widget. As an example, a simple drawing application is developed.\\u000a \\u000a \\u000a Other topics include polymorphism which is demonstrated

Kent D. Lee

257

Editing the UMLS Metathesaurus: Review and Enhancement of a Computed Knowledge Source  

PubMed Central

This paper describes the editing of Meta-1, the first official version of the National Library of Medicine's (NLM) Unified Medical Language System (UMLS) Metathesaurus. After a preliminary version of Meta-1 was generated by automated techniques, it was edited by domain experts. The goal of editing was to enhance approximately 30,000 Metathesaurus entries and to correct “errors of commission” introduced by the automated techniques. Enhancements were made by assigning semantic types (such as “Disease or Syndrome” or “Virus”) and lexical tags (such as “eponym”) to the Meta-1 entries. The production of Meta-1 required balancing the costs of human and computational resources appropriately, and it may illustrate a paradigm for the construction of large biomedical information resources. The tool-supported process of editing Meta-1, as well as some of the issues that arose during this endeavor, are presented. Despite its large scale, the Meta-1 editing task was accomplished within the specified constraints. The work was completed through the part-time efforts of twenty-six editors and project managers over a one-year period.

Sperzel, David; Erlbaum, Mark; Fuller, Lloyd; Sherertz, David; Olson, Nels; Schuyler, Peri; Hole, William; Savage, Allan; Passarelli, Philip; Tuttle, Mark

1990-01-01

258

Towards realism in drawing areas of interest on architecture diagrams  

E-print Network

: h.v.byelas@rug.nl (H. Byelas), a.c.telea@rug.nl (A. Telea). Journal of Visual Languages, and the quantitative analysis performed to compare different drawings. The combined user evaluation, algorithmicUML [5]. Software elements that share a common property are of particular interest in system analysis, e

Telea, Alexandru C.

259

CODE GENERATION FROM UML STATECHARTS Iftikhar Azim Niaz and Jiro Tanaka  

E-print Network

as objects, we extend the state design pattern to implement the sequential substates and concurrent substates diagram in an object-oriented language like Java using design patterns. In our approach, each state of the statechart features. KEY WORDS Software engineering, Object-oriented analysis and design, Statecharts, State

Tanaka, Jiro

260

Direction Neutral Language Transformation with Metamodels  

E-print Network

with a metamodel consisting of a UML class diagram with classes, attributes and associations and accompanying OCL diagrams of the syntax part correspond to the syntactically al- lowed words of the language. The semantics and semantics: A third goal is that we want to sepa- rate the languages into a syntax and a semantics part [HR04

Gogolla, Martin - Fachbereich 3

261

Direction Neutral Language Transformation with Metamodels  

E-print Network

with a metamodel consisting of a UML class diagram with classes, attributes and associations and accompanying OCL diagrams of the syntax part correspond to the syntactically al­ lowed words of the language. The semantics and semantics: A third goal is that we want to sepa­ rate the languages into a syntax and a semantics part [HR04

Gogolla, Martin - Fachbereich 3

262

On phase diagrams of magnetic reconnection  

SciTech Connect

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

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

2013-06-15

263

Science Visual Literacy: Learners' Perceptions and Knowledge of Diagrams  

ERIC Educational Resources Information Center

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

McTigue, Erin M.; Flowers, Amanda C.

2011-01-01

264

Evolution of HR Diagrams So as a cluster ages, the  

E-print Network

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

Barnes, Joshua Edward

265

Extraction, layout analysis and classification of diagrams in PDF documents  

Microsoft Academic Search

Diagrams are a critical part of virtually all scientific and technical documents. Analyzing diagrams will be important for building comprehensive document retrieval systems. This paper focuses on the extraction and classification of diagrams from PDF documents. We study diagrams available in vector (not raster) format in online research papers. PDF files are parsed and their vector graphics components installed in

Robert P. Futrelle; Mingyan Shao; Chris Cieslik; Andrea Elaina Grimes

2003-01-01

266

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2010 CFR

...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...

2010-10-01

267

Practical guidelines for the readability of IT-architecture diagrams  

Microsoft Academic Search

This paper presents the work done to establish guidelines for the creation of readable IT-architecture diagrams and gives some examples of guidelines and some examples of improved diagrams. These guidelines are meant to assist practicing IT-architects in preparing the diagrams to communicate their architectures to the various stakeholders. Diagramming has always been important in information technology (IT), but the recent

Henk Koning; Claire Dormann; Hans van Vliet

2002-01-01

268

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

Microsoft Academic Search

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

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

2005-01-01

269

A pseudo-haptic knot diagram interface  

NASA Astrophysics Data System (ADS)

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

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

2011-01-01

270

The Organization of Intrinsic Computation: Complexity-Entropy Diagrams and the Diversity of Natural Information Processing  

E-print Network

Intrinsic computation refers to how dynamical systems store, structure, and transform historical and spatial information. By graphing a measure of structural complexity against a measure of randomness, complexity-entropy diagrams display the range and different kinds of intrinsic computation across an entire class of system. Here, we use complexity-entropy diagrams to analyze intrinsic computation in a broad array of deterministic nonlinear and linear stochastic processes, including maps of the interval, cellular automata and Ising spin systems in one and two dimensions, Markov chains, and probabilistic minimal finite-state machines. Since complexity-entropy diagrams are a function only of observed configurations, they can be used to compare systems without reference to system coordinates or parameters. It has been known for some time that in special cases complexity-entropy diagrams reveal that high degrees of information processing are associated with phase transitions in the underlying process space, the so-called ``edge of chaos''. Generally, though, complexity-entropy diagrams differ substantially in character, demonstrating a genuine diversity of distinct kinds of intrinsic computation.

David P. Feldman; Carl S. McTague; James P. Crutchfield

2008-06-29

271

Employing UMLS for generating hints in a tutoring system for medical problem-based learning.  

PubMed

While problem-based learning has become widely popular for imparting clinical reasoning skills, the dynamics of medical PBL require close attention to a small group of students, placing a burden on medical faculty, whose time is over taxed. Intelligent tutoring systems (ITSs) offer an attractive means to increase the amount of facilitated PBL training the students receive. But typical intelligent tutoring system architectures make use of a domain model that provides a limited set of approved solutions to problems presented to students. Student solutions that do not match the approved ones, but are otherwise partially correct, receive little acknowledgement as feedback, stifling broader reasoning. Allowing students to creatively explore the space of possible solutions is exactly one of the attractive features of PBL. This paper provides an alternative to the traditional ITS architecture by using a hint generation strategy that leverages a domain ontology to provide effective feedback. The concept hierarchy and co-occurrence between concepts in the domain ontology are drawn upon to ascertain partial correctness of a solution and guide student reasoning towards a correct solution. We describe the strategy incorporated in METEOR, a tutoring system for medical PBL, wherein the widely available UMLS is deployed and represented as the domain ontology. Evaluation of expert agreement with system generated hints on a 5-point likert scale resulted in an average score of 4.44 (Spearman's ?=0.80, p<0.01). Hints containing partial correctness feedback scored significantly higher than those without it (Mann Whitney, p<0.001). Hints produced by a human expert received an average score of 4.2 (Spearman's ?=0.80, p<0.01). PMID:22429987

Kazi, Hameedullah; Haddawy, Peter; Suebnukarn, Siriwan

2012-06-01

272

ECE 423: DSP for Communication Block Diagrams  

E-print Network

and Quantization DSP System Design/Characterization Real-time DSP Hardware and Software - Understands basic signalECE 423: DSP for Communication Block Diagrams Discrete-time System Analysis/Design Sampling experience using MATLAB and Simulink for modeling of linear systems - For both continuous and discrete time

Schumacher, Russ

273

Computer-Generated Diagrams for the Classroom.  

ERIC Educational Resources Information Center

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

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

1986-01-01

274

Weight diagram construction of Lax operators  

SciTech Connect

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

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

1991-10-01

275

Dynamic Tactile Diagram Simplification on Refreshable Displays  

ERIC Educational Resources Information Center

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

Rastogi, Ravi; Pawluk, Dianne T. V.

2013-01-01

276

Near Earth Objects Program: Orbit Diagrams  

NSDL National Science Digital Library

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

NASA JPL Near Earth Object Program

277

Using Euler Diagrams in Traditional Library Environments  

E-print Network

Using Euler Diagrams in Traditional Library Environments J´er^ome Thi`evre, Marie-Luce Viaud 1 INA for traditional library environments, which allows the user to elaborate easily and efficiently new strategies one is an interactive representation of the structures composing the documentary kernel of the library

Verroust-Blondet, Anne

278

The granulation boundary in the HR diagram  

Microsoft Academic Search

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

David F. Gray; Thomas Nagel

1989-01-01

279

New developments in understanding the HR diagram  

Microsoft Academic Search

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

Cesare Chiosi; Gianpaolo Bertelli; Alessandro Bressan

1992-01-01

280

Synthetic HR-diagrams for massive stars  

Microsoft Academic Search

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

E. Nasi; C. Forieri

1990-01-01

281

NTNU Java: Free-Body Force Diagram  

NSDL National Science Digital Library

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

Hwang, Fu-Kwun

2005-02-07

282

The Keynesian Diagram: A Cross to Bear?  

ERIC Educational Resources Information Center

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

Fleck, Juergen

283

Knowledge Visualization Using Optimized General Logic Diagrams  

E-print Network

readable rule vi- sualization in the diagram. This problem has been solved by applying a simulated, such as Microsoft SQL Server 2000 Analysis Services, IBM DB2 Intelligent Miner, and Oracle Data Miner. They are also or more readable and visually attractive. Therefore, a problem arises as to how to optimize the attribute

Michalski, Ryszard S.

284

Phase diagram of the Kondo lattice  

Microsoft Academic Search

We discuss the phase diagram of the Kondo lattice: we generalize to the lattice a method proposed by Yoshimori and Sakurai for the single-impurity Kondo problem; this method transforms the Kondo exchange interaction into a fictitious s-f hybridization, and gives a resonance of width TK at the Fermi level. We study the Kondo phase and compare its energy with the

C. Lacroix; M. Cyrot

1979-01-01

285

Array diagrams and the Nial approach  

Microsoft Academic Search

The Nested Interactive Array Language, Nial, combines APL and LISP concepts and is based on the theory of nested rectangular arrays. Array theory provides a concise mathematical model of data capturing the essence of everyday data objects. Arrays are displayed by diagrams, which provide an easily comprehended way of communicating the rectangularity, nesting and content of arrays. A novel drawing

Fl. Schmidt; M. A. Jenkins

1982-01-01

286

Penguin diagrams for the HYP staggered fermions  

E-print Network

We present results of the one-loop corrections originating from the penguin diagrams for the improved staggered fermion operators constructed using various fat links such as Fat7, Fat7+Lepage, $\\bar{\\rm Fat7}$, HYP (I) and HYP (II). The main results include the diagonal/off-diagonal mixing coefficients and the matching formula between the continuum and lattice operators.

Keunsu Choi; Weonjong Lee

2003-09-15

287

Lecture Class -Thursday  

E-print Network

Lecture Class - Thursday Analysis Paper - Due Saturday Midnight Discussion Class - Tuesday PSYC410/510 Evolutionary Psychology: Tue/Thur 4:00-5:20pm) Class Format: In order to facilitate active participation, classes will alternate

Lockery, Shawn

288

Five Year Results of US Intergroup/RTOG 9704 With Postoperative CA 19-9 {<=}90 U/mL and Comparison to the CONKO-001 Trial  

SciTech Connect

Purpose: Radiation Therapy Oncology Group (RTOG) trial 9704 was the largest randomized trial to use adjuvant chemoradiation therapy for patients with pancreatic cancer. This report analyzes 5-year survival by serum level of tumor marker CA 19-9 of {<=}90 vs >90 U/mL and compares results to the those of the CONKO-001 trial. Methods and Materials: CA 19-9 expression was analyzed as a dichotomized variable ({<=}90 vs >90 U/mL). Cox proportional hazard models were used to identify the impact of the CA 19-9 value on overall survival (OS). Actuarial estimates of OS were calculated using the Kaplan-Meier method. Results: Both univariate (hazard ratio [HR] = 3.2; 95% confidence interval [CI], 2.3-4.3, P<.0001) and multivariate (HR = 3.1; 95% CI, 2.2-4.2, P<.0001) analyses demonstrated a statistically significant decrease in OS for CA 19-9 serum level of {>=}90 U/mL. For patients in the gemcitabine (Gem) treatment arm with CA 19-9 <90 U/mL, median survival was 21 months. For patients with CA 19-9 {>=}90 U/mL, this number dropped to 10 months. In patients with pancreatic head tumors in the Gem treatment arm with RT quality assurance per protocol and CA 19-9 of <90 U/mL, median survival and 5-year rate were 24 months and 34%. In comparison, the median survival and 5-year OS rate for patients in the Gem arm of the CONKO trial were 22 months and 21%. Conclusions: This analysis demonstrates that patients with postresection CA 19-9 values {>=}90 U/mL had a significantly worse survival. Patients with pancreatic head tumors treated with Gem with CA 19-9 serum level of <90 U/mL and per protocol RT had favorable survival compared to that seen in the CONKO trial. CA 19-9 is a stratification factor for the current RTOG adjuvant pancreas trial (0848).

Berger, Adam C., E-mail: adam.berger@jefferson.edu [Thomas Jefferson University Hospital, Philadelphia, Pennsylvania (United States); Winter, Kathryn [RTOG Statistical Center, Philadelphia, Pennsylvania (United States)] [RTOG Statistical Center, Philadelphia, Pennsylvania (United States); Hoffman, John P. [Fox Chase Cancer Center, Philadelphia, Pennsylvania (United States)] [Fox Chase Cancer Center, Philadelphia, Pennsylvania (United States); Regine, William F. [University of Maryland Medical Systems, Baltimore, Maryland (United States)] [University of Maryland Medical Systems, Baltimore, Maryland (United States); Abrams, Ross A. [Rush University Medical Center, Chicago, Illinois (United States)] [Rush University Medical Center, Chicago, Illinois (United States); Safran, Howard [Division of Hematology/Oncology, The Miriam Hospital, Providence, Rhode Island (United States)] [Division of Hematology/Oncology, The Miriam Hospital, Providence, Rhode Island (United States); Freedman, Gary M. [Fox Chase Cancer Center, Philadelphia, Pennsylvania (United States)] [Fox Chase Cancer Center, Philadelphia, Pennsylvania (United States); Benson, Alan B. [Northwestern Memorial Hospital, Chicago, Illinois (United States)] [Northwestern Memorial Hospital, Chicago, Illinois (United States); MacDonald, John [St. Vincent's Comprehensive Cancer Center, New York, New York (United States)] [St. Vincent's Comprehensive Cancer Center, New York, New York (United States); Willett, Christopher G. [Duke University Medical Center, Durham, North Carolina (United States)] [Duke University Medical Center, Durham, North Carolina (United States)

2012-11-01

289

Ring-Diagram Analysis: Status and Perspectives  

NASA Astrophysics Data System (ADS)

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

Hill, F.

290

Reheating Phase Diagram for Higgs Inflation  

E-print Network

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

Cai, Rong-Gen; Wang, Shao-Jiang

2015-01-01

291

Penguin diagrams for improved staggered fermions  

E-print Network

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

Weonjong Lee

2004-09-17

292

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2014 CFR

...RULES OF PRACTICE ABANDONMENT AND DISCONTINUANCE OF RAIL LINES AND RAIL TRANSPORTATION UNDER 49 U.S.C. 10903 System Diagram... (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...

2014-10-01

293

Gamma-Ray Burst Class Properties  

NASA Technical Reports Server (NTRS)

Guided by the supervised pattern recognition algorithm C4.5 developed by Quinlan in 1986, we examine the three gamma-ray burst classes identified by Mukherjee et al. in 1998. C4.5 provides strong statistical support for this classification. However, with C4.5 and our knowledge of the Burst and Transient Source Experiment (BATSE) instrument, we demonstrate that class 3 (intermediate fluence, intermediate duration, soft) does not have to be a distinct source population: statistical/systematic errors in measuring burst attributes combined with the well-known hardness/intensity correlation can cause low peak flux class 1 (high fluence, long, intermediate hardness) bursts to take on class 3 characteristics naturally. Based on our hypothesis that the third class is not a distinct one, we provide rules so that future events can be placed in either class 1 or class 2 (low fluence, short, hard). We find that the two classes are relatively distinct on the basis of Band's work in 1993 on spectral parameters alpha, beta, and E (sub peak) alone. Although this does not indicate a better basis for classification, it does suggest that different physical conditions exist for class 1 and class 2 bursts. In the process of studying burst class characteristics, we identify a new bias affecting burst fluence and duration measurements. Using a simple model of how burst duration can be underestimated, we show how this fluence duration bias can affect BATSE measurements and demonstrate the type of effect it can have on the BATSE fluence versus peak flux diagram.

Hakkila, Jon; Haglin, David J.; Pendleton, Geoffrey N.; Mallozzi, Robert S.; Meegan, Charles A.; Roiger, Richard J.

2000-01-01

294

Representing the Study Site in a Diagram  

NSDL National Science Digital Library

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

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

2003-08-01

295

Phase diagram of two capacitively coupled Josephson  

Microsoft Academic Search

We study the phase diagram of two capacitively coupled Josephson junction arrays with charging energy Ec, and Josephson coupling energy EJ in a perpendicular homogeneous magnetic field with frustration F= 1\\/2 and 1\\/3. The results are obtained using a path integral Quantum Monte Carlo algorithm. The parameter alphai that quantifies the quantum fluctuations in the i-th array is defined by

Guillermo Ramirez-Santiago; Jorge Jose v

2005-01-01

296

From Farey sequences to resonance diagrams  

NASA Astrophysics Data System (ADS)

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

Tomás, R.

2014-01-01

297

Instability regions in the upper HR diagram  

Microsoft Academic Search

The following instability regions for blueward evolving-supergiants are outlined and compared. (1) Areas in the Hertzsprung-Russell (HR) diagram where stars are dynamically unstable. (2) Areas where the effective acceleration in the upper part of the photospheres is negative, hence directed outward. (3) Areas where the sonic points of the stellar winds (where vwind=vsound) are situated inside the photospheres, at a

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

2001-01-01

298

From Hubble diagrams to scale factors  

E-print Network

We present a lower bound on the radius of the universe today $a_0$ and a monotonicity constraint on the Hubble diagram. Our theoretical input is Einstein's kinematics and maximally symmetric universes. Present supernova data yield $a_0 > 1.2\\cdot 10^{26}$ m. A first attempt to quantify the monotonicity constraint is described. We do not see any indication of non-monotonicity.

Thomas Schucker; Andre Tilquin

2005-06-20

299

Mechanical phase diagram of shrinking cylindrical gels  

NASA Astrophysics Data System (ADS)

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

Boudaoud, Arezki; Chaïeb, Sahraoui

2003-08-01

300

Modeling the state diagrams of ternary reciprocal systems  

NASA Astrophysics Data System (ADS)

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

Khaldoyanidi, K. A.

2014-12-01

301

The Critical Importance of Russell's Diagram  

NASA Astrophysics Data System (ADS)

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

Gingerich, O.

2013-04-01

302

The plutonium-oxygen phase diagram  

SciTech Connect

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

Haschke, J.M.

1990-01-01

303

SEMPA Measurements of Ferromagnetic Nanodisk Phase Diagrams  

NASA Astrophysics Data System (ADS)

We use Scanning Electron Microscopy with Polarization Analysis (SEMPA) to image the magnetic domain structures of ferromagnetic nanodisks with different diameters and thicknesses, and thereby determine the phase diagram of the ground state in these technologically important magnetic structures. Depending on the nanodisk dimensions, one of three distinct ground state magnetic configurations is observed: a single domain in-plane, a single domain out-of-plane, or a vortex state. In contrast to previous work, the magnetic states of individual nanodisks are determined using simultaneous SEMPA measurements of both the in-plane and out-of-plane magnetization components. By systematically imaging Permalloy nanodisks with diameters that range from 35 nm to 190 nm and with thicknesses that range from 10 nm to 65 nm, we are able to locate phase boundaries and the triple point between the three phases. Near the phase boundaries and triple point we observe a mixture of the different phases. A model magnetic phase diagram generated by using the OOMMF micromagnetic simulator is found to agree well with the phase diagram determined by the SEMPA measurements. This work is supported by the NIST-CNST/UMD-NanoCenter Cooperative Agreement.

Chung, Seok-Hwan; McMichael, Robert; Pierce, Daniel; Unguris, John

2009-03-01

304

Active Comparison as a Means of Promoting the Development of Abstract Conditional Knowledge and Appropriate Choice of Diagrams in Math Word Problem Solving  

Microsoft Academic Search

\\u000a This study sought to address the problem of novices not being able to select the appropriate diagrams to suit given tasks.\\u000a It investigated the usefulness of providing teaching sessions that involved active comparison of diagrams and review of lessons\\u000a learnt following problem solving. Fifty-eight 8th grade participants were assigned to one of two instruction conditions. In\\u000a both, traditional math classes

Yuri Uesaka; Emmanuel Manalo

2006-01-01

305

Triangular Diagrams Teach Steady and Dynamic Behaviour of Catalytic Reactions.  

ERIC Educational Resources Information Center

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)

Klusacek, K.; And Others

1989-01-01

306

Correlation diagrams for rigid and nonrigid three-body systems  

Microsoft Academic Search

A correlation diagram is constructed for the energy levels of a three-body system. The principle limiting cases for which the diagram is constructed are the equilateral triangle of three identical particles and the completely nonrigid cluster with pairwise harmonic forces. The artificial symmetries of these limits can be broken by conventional methods to make the diagram suitable for real molecules.

Michael E. Kellman; François Amar; R. Stephen Berry

1980-01-01

307

Hook lengths in a skew Young diagram Svante Janson  

E-print Network

Hook lengths in a skew Young diagram Svante Janson Department of Mathematics, Uppsala University PO some properties of the set of hook lengths for certain skew Young diagrams, using asymptotic obtained some properties of the set of hook lengths for certain skew Young diagrams. They prove the results

Janson, Svante

308

Towards Mitigating the Complexity of System Level Design Diagrams  

Microsoft Academic Search

The automatic generation of diagrams has been practically used in the HDL based design for decades. Unfortunately, the diagrams in the system level have become too complicated for the designers to identify signal flows. In this paper, we propose three techniques to enhance the readability of the even more complicated higher level diagrams. They include i) the transformation of repetitive

Euncheol Lee; Kyosun Kim; Sang-Gu Jo; Sung-Hwan Oh

309

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

NSDL National Science Digital Library

Fishbone diagrams, also known as Ishikawa diagrams or cause-and-effect diagrams, are one of the many problem-solving tools created by Dr. Kaoru Ishikawa, a University of Tokyo professor. Part of the brilliance of Ishikawa's idea resides in the simplicity

James Wandersee

2010-07-01

310

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

E-print Network

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

D'Antona, Francesca

311

MAGNETIC FIELDS IN THE HR DIAGRAM Jeffrey L. Linsky  

E-print Network

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

Linsky, Jeffrey L.

312

Density-Enthalpy Phase Diagram 0D Boiler Simulation  

E-print Network

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

Vuik, Kees

313

The Use of Semantic Constraints on Diagram Editors  

Microsoft Academic Search

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

J. Artur Serrano

1995-01-01

314

Dinosaur Extinction: Causal Loop Diagram of Earth Feedback System  

NSDL National Science Digital Library

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

Mclean, Dewey M.; Tech, Virginia

315

Delta diagram based test for the Halphen (A and B) and the Gamma distributions  

NASA Astrophysics Data System (ADS)

The most used statistical distributions to fit extreme value data in hydrology, can be regrouped in three classes: class C of regularly varying distributions and class D of sub exponential distributions, depending on their tail behaviour. The Halphen distributions (Halphen type A (HA) and Halphen type B (HB)) have both the Gamma (G2) distribution as limiting case and all these three distributions belong to the class D and can be displayed in the (Delta1 = ln(A/G); Delta2 = ln(G/H)) moment ratio diagram based on Geometric (G), Arithmetic (A) and Harmonic (H) means. In this study, a statistical test for discriminating between HA, HB and the Gamma distribution is developed. The methodology is based on Monte Carlo simulation for (1) the determination of the confidence regions around the Gamma curve for each fixed couple (Delta1 , Delta2) and (2) the study of the power of the proposed test for both alternatives HA and HB distributions and comparison with the Likelihood Ratio Test (LRT). Results showed that the test is powerful especially for high values of skewness and is far better than the LRT. This test will be included, shortly, in Decision Support System (DSS) of the HYFRAN-PLUS software. Key words: Halphen distributions, Gamma distribution, Heavy tailed distribution, Monte Carlo simulation, (Delta1 , Delta2) diagram, power of the test, HYFRAN-PLUS.

El Adlouni, Salaheddine; Bobée, Bernard

2014-05-01

316

Lecture Class -Analysis Paper -  

E-print Network

Lecture Class - Wednesday Analysis Paper - Due Friday Midnight Discussion Class - Monday PSYC410" in the subject line TA: ) Office hours: Office Email: (please put "410" in the subject line Class Format: In order to facilitate active participation, classes will alternate between Lecture Classes and Discussion

Lockery, Shawn

317

Teachers in Class  

ERIC Educational Resources Information Center

In this article, I argue for a closer read of the daily "class work" of teachers, as posited by Reay, 1998. In developing exploratory class portraits of four teachers who occupy distinctive social positions (two from working-class homes now teaching upper-middle-class children and two from upper-middle-class homes now teaching poor children), I…

Van Galen, Jane

2008-01-01

318

A CSP View on UMLRT structure diagrams Clemens Fischer, ErnstRudiger Olderog and Heike Wehrheim  

E-print Network

of distributed interconnected systems. UML­RT defines three new constructs for modelling structure: capsules, instantiation and inheritance), and, like UML, #12; it combines a formalism for describing static aspects (Z

Habel, Annegret

319

Lecture Class -Wednesday  

E-print Network

Lecture Class - Wednesday Analysis Paper - Due Friday Midnight Discussion Class - Monday PSYC410/510 Evolutionary Psychology: Mon/Wed 2:00-3:20pm "410" in the subject line) Class Format: In order to facilitate active

Lockery, Shawn

320

Mean-Curvature Flow of Voronoi Diagrams  

NASA Astrophysics Data System (ADS)

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

Elsey, Matt; Slep?ev, Dejan

2015-02-01

321

Failure Assessment Diagram for Titanium Brazed Joints  

NASA Technical Reports Server (NTRS)

The interaction equation was used to predict failure in Ti-4V-6Al joints brazed with Al 1100 filler metal. The joints used in this study were geometrically similar to the joints in the brazed beryllium metering structure considered for the ATLAS telescope. This study confirmed that the interaction equation R(sub sigma) + R(sub Tau) = 1, where R(sub sigma) and R(sub Tau)are normal and shear stress ratios, can be used as conservative lower bound estimate of the failure criterion in ATLAS brazed joints as well as for construction of the Failure Assessment Diagram (FAD).

Flom, Yury; Jones, Justin S.; Powell, Mollie M.; Puckett, David F.

2011-01-01

322

Ten proposed rules of numerical diagrams  

NASA Astrophysics Data System (ADS)

Diagrams have been used for 3 centuries to present numerical information succinctly. Yet no complete, specific rules are available for their preparation, similar to the rules of grammar, syntax, and spelling of language. Some guidance is offered in the dozen books on graphics published in the United States in the past 40 years, and fragments appear in textbooks and manuals. But none of these is complete or consistent, and each offers at least one glaring contravention of the basic tenets of mathematics and logic.

Court, Arnold

323

Phase diagram of electron-doped dichalcogenides  

NASA Astrophysics Data System (ADS)

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

Rösner, M.; Haas, S.; Wehling, T. O.

2014-12-01

324

Critical point analysis of phase envelope diagram  

SciTech Connect

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

Soetikno, Darmadi; 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

325

Phase diagram of quantum square ice  

NASA Astrophysics Data System (ADS)

We have investigated the ground-state and finite-temperature phase diagram of quantum square ice - realized by the transverse-field Ising model on a checkerboard lattice - using both linear spin-wave (LSW) theory and quantum Monte Carlo (QMC). We generalize the model with different couplings between nearest (J1) and next-to-nearest (J2) neighbors on the checkerboard lattice. Our QMC approach generalizes the loop algorithm - very efficient in the study of constrained classical systems - to a ``brane algorithm'' for quantum systems. At the LSW level the vast degeneracy of the ground-state for J1=J2 and J2>J1 remains intact; moreover LSW theory breaks down in extended regions of the phase diagram, pointing at non-classical states [1]. Our QMC study goes beyond perturbative schemes and addresses directly the nature of the low-temperature phases. We have critically examined the possibility of a resonating-plaquette state for J1=J2, suggested by degenerate perturbation theory on the ice-rule manifold for weak fields. Our QMC results for finite fields confirm the absence of Néel or collinear order, but they do not confirm the presence of resonating-plaquette order, pointing at a possibly more complex non-classical state.[4pt] [1] L.-P. Henry et al., PRB 85, 134427 (2012).

Henry, Louis-Paul; Holdsworth, Peter; Mila, Frederic; Roscilde, Tommaso

2013-03-01

326

Revisiting the phase diagram of hard ellipsoids.  

PubMed

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

Odriozola, Gerardo

2012-04-01

327

Instability Regions in the Upper HR Diagram  

NASA Technical Reports Server (NTRS)

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

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

2001-01-01

328

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

ERIC Educational Resources Information Center

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

de Freitas, Elizabeth

2012-01-01

329

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

NASA Astrophysics Data System (ADS)

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

Jian, Yu-Cin; Wu, Chao-Jung

2015-02-01

330

Bianchi I meets the Hubble diagram  

NASA Astrophysics Data System (ADS)

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

Schücker, Thomas; Tilquin, André; Valent, Galliano

2014-11-01

331

Phase diagram of nondegenerate twisted mass fermions  

NASA Astrophysics Data System (ADS)

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

Horkel, Derek P.; Sharpe, Stephen R.

2014-11-01

332

Microfluidic Evaporation for Phase Diagram Screening  

NASA Astrophysics Data System (ADS)

We use a pervaporation-based microfluidic device to concentrate solutions in a controlled way. This allows us to develop chips for phase diagram screening,and to study both fundamental and technological issues, such as the impact of kinetic pathway of concentration on a variety of aqueous solutions (colloids, surfactants, polymers and mixtures of thereof). The first part of the presentation will deals with the characterization of the concentration process (including analytical results, numerical simulations, and experimental observations). It will be shown that our device is well suited for a wide range of particle sizes in the colloidal range. In the second part, we will present results obtained on several systems during (along) the concentration process (surfactants and polymers). On-chip FRAP (fluorescence recovery after photobleaching) and microrheology measurements will be presented in addition to optical and fluorescence microscopy.

Moreau, Patrick; Salmon, Jean-Baptiste; Leng, Jacques

2007-11-01

333

Excitonic phase diagram in unstressed Ge  

NASA Astrophysics Data System (ADS)

Evidence is presented for a second condensed phase of excitons in unstressed, high-purity Ge, based on a simple plasma line-shape analysis. Above the critical temperature for electron-hole liquid condensation (Tc~=7 K), time-resolved photoluminescence spectra can be fit with an electron-hole plasma component with nondecaying density, implying spatial condensation into droplets. Shortly after the excitation source is switched off, all successive luminescence spectra are fit with a constant-density electron-hole plasma line shape plus contributions from free excitons and excitonic complexes. The spectral analysis is based on separate characterizations of electron-hole plasma and excitonic complexes from published experimental and theoretical work. The presence of a second condensed phase of excitons in unstressed Ge would be consistent with recent findings of a similar nature in stressed germanium and unstressed silicon. A possible phase diagram is suggested based on the present findings.

Simon, A. H.; Kirch, S. J.; Wolfe, J. P.

1992-10-01

334

Improving perturbation theory with cactus diagrams  

E-print Network

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...

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

2006-01-01

335

Probing the QCD phase diagram with fluctuations  

NASA Astrophysics Data System (ADS)

The relevance of higher order cumulants of conserved charges for the analysis of freeze-out and critical conditions in heavy ion collisions at LHC and RHIC is discussed. Using properties of O(4) scaling functions, the generic structure of these higher cumulants at vanishing baryon chemical potential is discussed. Chiral model calculations are then used to study their properties at non-zero baryon chemical potential. It is argued that the rapid variation of sixth and higher order cumulants at the phase boundary may be used to explore the QCD phase diagram in experiment. Moreover, results for the Polyakov loop susceptibilities in SU(3) lattice gauge theory as well as in (2+1) flavor lattice QCD are discussed. An analysis of the ratios of susceptibilities indicates that the deconfinement transition is reflected in characteristic modifications of these ratios.

Friman, Bengt

2014-08-01

336

New developments in the ab initio'' determination of transition metal alloy phase diagrams  

SciTech Connect

Certain classes of temperature-composition binary alloy phase diagrams can now be computed in an ab-initio'' approach. No adjustable or experimentally fitted parameter is used. The expectation value of the energy is expressed in terms of an expansion of cluster probabilities, where the prefactors, the Effective Cluster Interaction, are related to the alloy electronic structure. This framework is used to study the MoRe alloy for two situations: bulk and semi-infinite crystal bounded by a (001) surface. In both cases, good agreement with experimental data is found.

Wolverton, C.; Asta, M. (California Univ., Berkeley, CA (United States). Dept. of Physics); Quannasser, S.; Dreysse, H. (Nancy Univ., (France). Lab. de Physique des Solides); de Fontaine, D. (California Univ., Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering)

1992-04-01

337

New developments in the ``ab initio`` determination of transition metal alloy phase diagrams  

SciTech Connect

Certain classes of temperature-composition binary alloy phase diagrams can now be computed in an ``ab-initio`` approach. No adjustable or experimentally fitted parameter is used. The expectation value of the energy is expressed in terms of an expansion of cluster probabilities, where the prefactors, the Effective Cluster Interaction, are related to the alloy electronic structure. This framework is used to study the MoRe alloy for two situations: bulk and semi-infinite crystal bounded by a (001) surface. In both cases, good agreement with experimental data is found.

Wolverton, C.; Asta, M. [California Univ., Berkeley, CA (United States). Dept. of Physics; Quannasser, S.; Dreysse, H. [Nancy Univ., (France). Lab. de Physique des Solides; de Fontaine, D. [California Univ., Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering

1992-04-01

338

Band diagrams of layered plasmonic metamaterials  

NASA Astrophysics Data System (ADS)

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

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

2014-11-01

339

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

340

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

341

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

342

Visualization design and verification of Ada tasking using timing diagrams  

NASA Technical Reports Server (NTRS)

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

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

1986-01-01

343

Domain-specific languages and diagram customization for a concurrent engineering environment  

NASA Astrophysics Data System (ADS)

A major open question for advocates of Model-Based Systems Engineering (MBSE) is the question of how system and subsystem engineers will work together. The Systems Modeling Language (SysML), like any language intended for a large audience, is in tension between the desires for simplicity and for expressiveness. In order to be more expressive, many specialized language elements may be introduced, which will unfortunately make a complete understanding of the language a more daunting task. While this may be acceptable for systems modelers, it will increase the challenge of including subsystem engineers in the modeling effort. One possible answer to this situation is the use of Domain-Specific Languages (DSL), which are fully supported by the Unified Modeling Language (UML). SysML is in fact a DSL for systems engineering. The expressive power of a DSL can be enhanced through the use of diagram customization. Various domains have already developed their own schematic vocabularies. Within the space engineering community, two excellent examples are the propulsion and telecommunication subsystems. A return to simple box-and-line diagrams (e.g., the SysML Internal Block Diagram) are in many ways a step backward. In order allow subsystem engineers to contribute directly to the model, it is necessary to make a system modeling tool at least approximate in accessibility to drawing tools like Microsoft PowerPoint and Visio. The challenge is made more extreme in a concurrent engineering environment, where designs must often be drafted in an hour or two. In the case of the Jet Propulsion Laboratory's Team X concurrent design team, a subsystem is specified using a combination of PowerPoint for drawing and Excel for calculation. A pilot has been undertaken in order to meld the drawing portion and the production of master equipment lists (MELs) via a SysML authoring tool, MagicDraw. Team X currently interacts with its customers in a process of sharing presentations. There are severa- inefficiencies that arise from this situation. The first is that a customer team must wait two weeks to a month (which is 2-4 times the duration of most Team X studies themselves) for a finalized, detailed design description. Another is that this information must be re-entered by hand into the set of engineering artifacts and design tools that the mission concept team uses after a study is complete. Further, there is no persistent connection to Team X or institutionally shared formulation design tools and data after a given study, again reducing the direct reuse of designs created in a Team X study. This paper presents the underpinnings of subsystem DSLs as they were developed for this pilot. This includes specialized semantics for different domains as well as the process by which major categories of objects were derived in support of defining the DSLs. The feedback given to us by the domain experts on usability, along with a pilot study with the partial inclusion of these tools is also discussed.

Cole, B.; Dubos, G.; Banazadeh, P.; Reh, J.; Case, K.; Wang, Y.; Jones, S.; Picha, F.

344

Aeroflex Technology as Class-Y Demonstrator  

NASA Technical Reports Server (NTRS)

Modern space field programmable gate array (FPGA) devices with increased functional density and operational frequency, such as Xilinx Virtex 4 (V4) and S (V5), are packaged in non-hermetic ceramic flip chip forms. These next generation space parts were not qualified to the MIL-PRF-38535 Qualified Manufacturer Listing (QML) class-V when they were released because class-V was only intended for hermetic parts. In order to bring Xilinx V5 type packages into the QML system, it was suggested that class-Y be set up as a new category. From 2010 through 2014, a JEDEC G12 task group developed screening and qualification requirements for Class-Y products. The Document Standardization Division of the Defense Logistics Agency (DLA) has completed an engineering practice study. In parallel with the class-Y efforts, the NASA Electronic Parts and Packaging (NEPP) program has funded JPL to study potential reliability issues of the class-Y products. The major hurdle of this task was the absence of adequate research samples. Figure 1-1 shows schematic diagrams of typical structures of class-Y type products. Typically, class-Y products are either in ceramic flip chip column grid array (CGA) or land grid array (LGA) form. In class-Y packages, underfill and heat spread adhesive materials are directly exposed to the spacecraft environment due to their non-hermeticity. One of the concerns originally raised was that the underfill material could degrade due to the spacecraft environment and negatively impact the reliability of the package. In order to study such issues, it was necessary to use ceramic daisy chain flip chip package samples so that continuity of flip chip solder bumps could be monitored during the reliability tests. However, none of the commercially available class-Y daisy chain parts had electrical connections through flip chip solder bumps; only solder columns were daisy chained, which made it impossible to test continuity of flip chip solder bumps without using extremely costly functional parts. Among space parts manufacturers who were interested in producing class-Y products, Aeroflex Microelectronic Solutions-HiRel had been developing assembly processes using their internal R&D classy type samples. In early 2012, JPL and Aeroflex initiated a collaboration to study reliability of the Aeroflex technology as a class-Y demonstrator.

Suh, Jong-ook; Agarwal, Shri; Popelar, Scott

2014-01-01

345

MDE approach to the co-synthesis of embedded systems using a MOF-based internal design representation  

Microsoft Academic Search

This work presents a Model Driven Engineering (MDE) approach to the generation of a MOF-based internal design representation for an embedded application described using UML class and sequence diagrams. Differently from other similar MDE-based approaches for embedded system design, which translate UML models to some specific internal format, our internal design representation, as a MOF-based metamodel, can take advantage of

Francisco Assis M. Do Nascimento; Marcio F. Da S. Oliveira; Flávio Rech Wagner

2009-01-01

346

Application of Information Technology: Improved Identification of Noun Phrases in Clinical Radiology Reports Using a High-Performance Statistical Natural Language Parser Augmented with the UMLS Specialist Lexicon  

Microsoft Academic Search

ObjectiveThe aim of this study was to develop and evaluate a method of extracting noun phrases with full phrase structures from a set of clinical radiology reports using natural language processing (NLP) and to investigate the effects of using the UMLS® Specialist Lexicon to improve noun phrase identification within clinical radiology documents.DesignThe noun phrase identification (NPI) module is composed of

Yang Huang; Henry J. Lowe; Dan Klein; Russell J. Cucina

2005-01-01

347

Understanding fine magnetic particle systems through use of first-order reversal curve diagrams  

NASA Astrophysics Data System (ADS)

reversal curve (FORC) diagrams are constructed from a class of partial magnetic hysteresis loops known as first-order reversal curves and are used to understand magnetization processes in fine magnetic particle systems. A wide-ranging literature that is pertinent to interpretation of FORC diagrams has been published in the geophysical and solid-state physics literature over the past 15 years and is summarized in this review. We discuss practicalities related to optimization of FORC measurements and important issues relating to the calculation, presentation, statistical significance, and interpretation of FORC diagrams. We also outline a framework for interpreting the magnetic behavior of magnetostatically noninteracting and interacting single domain, superparamagnetic, multidomain, single vortex, and pseudosingle domain particle systems. These types of magnetic behavior are illustrated mainly with geological examples relevant to paleomagnetism, rock magnetism, and environmental magnetism. These technical, experimental, and interpretational considerations are relevant to applications that range from improving particulate media for magnetic recording in materials science, to providing a foundation for understanding geomagnetic recording by rocks in geophysics, to interpreting depositional, microbiological, and environmental processes in sediments.

Roberts, Andrew P.; Heslop, David; Zhao, Xiang; Pike, Christopher R.

2014-12-01

348

K-terminal Network Reliability Evaluation Using Binary Decision Diagram  

Microsoft Academic Search

Binary decision diagram (BDD) is a modern data structure proved to be compact in representation and efficient in manipulation of Boolean formulas. Using binary decision diagram in network reliability analysis has already been investigated by some researchers. In this paper we show how an exact algorithm for network reliability can be improved and implemented efficiently using CUDD - Colorado University

Mohammad Ghasemzadeh; Christoph Meinel; Sara Khanji

2008-01-01

349

Voronoi diagrams of set-theoretic solid models  

Microsoft Academic Search

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

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

1992-01-01

350

Adding Value to Force Diagrams: Representing Relative Force Magnitudes  

ERIC Educational Resources Information Center

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

Wendel, Paul

2011-01-01

351

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

Microsoft Academic Search

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

L. Glasser

2004-01-01

352

Water, Water Everywhere: Phase Diagrams of Ordinary Water Substance  

ERIC Educational Resources Information Center

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

Glasser, L.

2004-01-01

353

Hook lengths in a skew Young diagram Svante Janson  

E-print Network

Hook lengths in a skew Young diagram Svante of the set of hook lengths for certain skew Young diagrams, usi* *ng asymptotic calculations and Vershik [1] have recently obtained some properties of the set of hook* * lengths for certain skew Young

Janson, Svante

354

Diagram This Headline in One Minute, if You Can  

ERIC Educational Resources Information Center

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

Landecker, Heidi

2009-01-01

355

Heuristic Diagrams as a Tool to Teach History of Science  

ERIC Educational Resources Information Center

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

Chamizo, Jose A.

2012-01-01

356

Drawing Euler Diagrams with Circles: The Theory of Piercings  

E-print Network

Drawing Euler Diagrams with Circles: The Theory of Piercings Gem Stapleton, Leishi Zhang, John comprehensible. In this paper, we address these two issues by developing the theory of piercings, where we define single piercing curves and double piercing curves. We prove that if a diagram can be built inductively

Reiterer, Harald

357

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

ERIC Educational Resources Information Center

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

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

2012-01-01

358

Generating Time Space Diagram Using Event-Based Traffic Data  

E-print Network

Generating Time Space Diagram Using Event-Based Traffic Data Presented by: Heng Hu, PhD Jianfeng rely on Synchro TS-Diagram · Field verification is done via probe vehicles, which is time consuming Det A B C Time Space Delayed arrivals Link Entrance Dummy Vehicle QOD vf Back of Queue Queue Departure

Minnesota, University of

359

Diversions: Spatial Thinking Tasks--Cube Diagrams and Drawings  

ERIC Educational Resources Information Center

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

Gough, John

2009-01-01

360

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

ERIC Educational Resources Information Center

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

Goodwin, Alan

2002-01-01

361

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

ERIC Educational Resources Information Center

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…

de Freitas, Elizabeth; Sinclair, Nathalie

2012-01-01

362

HR diagrams derived from the Michigan Spectral Catalogue  

Microsoft Academic Search

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

N. Houk; R. Fesen

1978-01-01

363

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

Microsoft Academic Search

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

Cornelis Jager

1990-01-01

364

Diagrams in Mathematics: To Draw or Not to Draw?  

ERIC Educational Resources Information Center

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

Mudaly, Vimolan

2012-01-01

365

Irradiation distribution diagrams and their use for estimating collectable energy  

Microsoft Academic Search

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

M Rönnelid; B Karlsson

1997-01-01

366

30 CFR 256.8 - Leasing maps and diagrams.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Leasing maps and diagrams. 256.8 Section...DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER...Sulphur Management, General § 256.8 Leasing maps and diagrams. (a)...

2011-07-01

367

30 CFR 256.8 - Leasing maps and diagrams.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Leasing maps and diagrams. 256.8 Section...DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER...Sulphur Management, General § 256.8 Leasing maps and diagrams. (a)...

2010-07-01

368

30 CFR 556.8 - Leasing maps and diagrams.  

Code of Federal Regulations, 2014 CFR

...2014-07-01 2014-07-01 false Leasing maps and diagrams. 556.8 Section...DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER...Sulphur Management, General § 556.8 Leasing maps and diagrams. (a)...

2014-07-01

369

30 CFR 556.8 - Leasing maps and diagrams.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Leasing maps and diagrams. 556.8 Section...DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER...Sulphur Management, General § 556.8 Leasing maps and diagrams. (a)...

2012-07-01

370

30 CFR 556.8 - Leasing maps and diagrams.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Leasing maps and diagrams. 556.8 Section...DEPARTMENT OF THE INTERIOR OFFSHORE LEASING OF SULPHUR OR OIL AND GAS IN THE OUTER...Sulphur Management, General § 556.8 Leasing maps and diagrams. (a)...

2013-07-01

371

Voronoi Diagram of Polygonal Chains under the Discrete Frechet Distance  

E-print Network

Voronoi Diagram of Polygonal Chains under the Discrete Fr´echet Distance Sergey Bereg1 , Kevin is the (continuous/discrete) Fr´echet distance. In this paper, for the first time, we consider the Voronoi diagram of polygonal chains in d-dimension under the discrete Fr´echet distance. Given a set C of n polygonal chains

Zhu, Binhai

372

Drawing Area-Proportional Venn-3 Diagrams with Convex Polygons  

E-print Network

Drawing Area-Proportional Venn-3 Diagrams with Convex Polygons Peter Rodgers1 , Jean Flower2 , Gem Modelling Group, University of Brighton, UK {g.e.stapleton,john.howse}@brighton.ac.uk Abstract. Area-proportional intersections have a specified numerical value. In these diagrams, the areas of the re- gions are in proportion

Kent, University of

373

Block diagrams and splitting criteria for classification trees  

Microsoft Academic Search

Various aspects of the classification tree methodology of Breiman et al., (1984) are discussed. A method of displaying classification trees, called block diagrams, is developed. Block diagrams give a clear presentation of the classification, and are useful both to point out features of the particular data set under consideration and also to highlight deficiencies in the classification method being used.

Paul C. Taylor; Bernard W. Silverman

1993-01-01

374

Phase Diagram and Scattering Intensity of Binary Amphiphilic Systems  

E-print Network

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

Schwarz, Ulrich

375

Fully Dynamic and Kinematic Voronoi Diagrams in GIS  

Microsoft Academic Search

This paper gives a survey of static, dynamic, and kinematic Voronoi diagrams as a basic tool for Geographic Information Systems (GIS). We show how the Voronoi diagram with its dual, the Delaunay multigraph, can be used to maintain the topology of the map objects of a GIS. The presented method allows the insertion, deletion, and translation of points and line

Christopher M. Gold; Peter R. Remmele; Thomas Roos

376

ARAUCARIA: SOFTWARE FOR ARGUMENT ANALYSIS, DIAGRAMMING AND REPRESENTATION  

E-print Network

community and in teaching critical thinking skills to undergraduates is argument diagramming. By identifying for the academic community. Keywords: Argumentation schemes, argumentation theory, critical thinking, diagramming, where it aims to teach students both to think critically about the arguments of others, and to create

Reed, Chris

377

First Day of Class  

NSDL National Science Digital Library

Compiled by Carol Ormand, SERC, Carleton College Check out a set of videos of what faculty in several disciplines do on their first day of class. Why is the first day important? It's the first day of class, ...

378

Calculation of Gallium-metal-Arsenic phase diagrams  

NASA Technical Reports Server (NTRS)

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

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

1991-01-01

379

Core collapse supernovae in the QCD phase diagram  

SciTech Connect

We compare two classes of hybrid equations of state with a hadron-to-quark matter phase transition in their application to core collapse supernova simulations. The first one uses the quark bag model and describes the transition to three-flavor quark matter at low critical densities. The second one employs a Polyakov-loop extended Nambu-Jona-Lasinio (PNJL) model with parameters describing a phase transition to two-flavor quark matter at higher critical densities. These models possess a distinctly different temperature dependence of their transition densities which turns out to be crucial for the possible appearance of quark matter in supernova cores. During the early post-bounce accretion phase quark matter is found only if the phase transition takes place at sufficiently low densities as in the study based on the bag model. The increase critical density with increasing temperature, as obtained for our PNJL parametrization, prevents the formation of quark matter. The further evolution of the core collapse supernova as obtained applying the quark bag model leads to a structural reconfiguration of the central protoneutron star where, in addition to a massive pure quark matter core, a strong hydrodynamic shock wave forms and a second neutrino burst is released during the shock propagation across the neutrinospheres. We discuss the severe constraints in the freedom of choice of quark matter models and their parametrization due to the recently observed 2M{sub Circled-Dot-Operator} pulsar and their implications for further studies of core collapse supernovae in the QCD phase diagram.

Fischer, T., E-mail: t.fischer@gsi.de [Helmholtzzentrum fuer Schwerionenforschung GmbH, GSI (Germany); Blaschke, D. [University of Wroclaw, Institute for Theoretical Physics (Poland); Hempel, M. [University of Basel, Department of Physics (Switzerland); Klaehn, T.; Lastowiecki, R. [University of Wroclaw, Institute for Theoretical Physics (Poland); Liebendoerfer, M. [University of Basel, Department of Physics (Switzerland); Martinez-Pinedo, G. [Helmholtzzentrum fuer Schwerionenforschung GmbH, GSI (Germany); Pagliara, G.; Sagert, I. [Ruprecht-Karls-Universitaet, Institut fuer Theoretische Physik (Germany); Sandin, F. [Lulea Tekniska Universitet, Department of Computer Science and Electrical Engineering, EISLAB (Sweden); Schaffner-Bielich, J. [Ruprecht-Karls-Universitaet, Institut fuer Theoretische Physik (Germany); Typel, S. [Helmholtzzentrum fuer Schwerionenforschung GmbH, GSI (Germany)

2012-05-15

380

Classes of Digraphs  

Microsoft Academic Search

\\u000a In this chapter we introduce several classes of digraphs. We study these classes with respect to their properties, characterization,\\u000a recognition and decomposition. Further properties of the classes are studied in the following chapters of this book.

Jørgen Bang-Jensen; Gregory Z. Gutin

381

Girls' Class, Infinite Possibilities.  

ERIC Educational Resources Information Center

The co-director of a small independent school describes Girls' Class, which she created in order to have a special time together with the girls in grades 6 through 8. The class provides guidance and celebrates spirituality and the beginning of menses for the young women. To end the class, each person says a positive self-affirmation and gives…

Ost, Nancy

1999-01-01

382

CLASS DESCRIPTIONS CYCLING SERIES  

E-print Network

CLASS DESCRIPTIONS CYCLING SERIES CYCLING Whether you are an avid cyclist or just beginning, this class will provide a high-intensity cardio workout. Ride around the world in all types of terrain, while for all participants. This class is open to 30 participants. ULTIMATE CYCLING Ultimate Cycling

Pittendrigh, Barry

383

Type classes in Haskell  

Microsoft Academic Search

This article defines a set of type inference rules for resolving overloading introduced by type classes, as used in the functional programming language Haskell. Programs including type classes are transformed into ones which may be typed by standard Hindley-Milner inference rules. In contrast to other work on type classes, the rules presented here relate directly to Haskell programs. An innovative

Cordelia V. Hall; Kevin Hammond; Simon L. Peyton Jones; Philip L. Wadler

1996-01-01

384

Phase diagram of colloid-rod system  

NASA Astrophysics Data System (ADS)

The semigrand ensemble theory [H. N. W. Lekkerkerker, W. C. K. Poon, P. N. Pusey, A. Stroobants, and P. B. Warren, Europhys. Lett. 20, 559 (1992)] in conjunction with the fundamental measure density functional theory [V. B. Warshavsky and X. Song, Phys. Rev. E 69, 061113 (2004)] are used to construct the Helmholtz free energy densities of a mixture of uncharged colloidal hard spheres and colloidal rods in its solid and liquid phases. Given these free energy density functions, we apply the free energy density minimization method [G. F. Wang and S. K. Lai, Phys. Rev. E 70, 051402 (2004)] to crosshatch the system's regions of phases in coexistence. The calculated results show that the triangular area bounded by gas-liquid, gas-solid, and liquid-solid coexisting two phases which has been called the coexistence region of gas-liquid-solid corresponds in fact to sets of two phases in coexistence. The phase boundaries which define our calculated coexistence domains compare very well with previous theoretical calculations. The relevance of the phase-diagram domains to three phases in coexistence will be discussed.

Lai, S. K.; Xiao, Xuhui

2010-01-01

385

Phase diagram of colloid-rod system.  

PubMed

The semigrand ensemble theory [H. N. W. Lekkerkerker, W. C. K. Poon, P. N. Pusey, A. Stroobants, and P. B. Warren, Europhys. Lett. 20, 559 (1992)] in conjunction with the fundamental measure density functional theory [V. B. Warshavsky and X. Song, Phys. Rev. E 69, 061113 (2004)] are used to construct the Helmholtz free energy densities of a mixture of uncharged colloidal hard spheres and colloidal rods in its solid and liquid phases. Given these free energy density functions, we apply the free energy density minimization method [G. F. Wang and S. K. Lai, Phys. Rev. E 70, 051402 (2004)] to crosshatch the system's regions of phases in coexistence. The calculated results show that the triangular area bounded by gas-liquid, gas-solid, and liquid-solid coexisting two phases which has been called the coexistence region of gas-liquid-solid corresponds in fact to sets of two phases in coexistence. The phase boundaries which define our calculated coexistence domains compare very well with previous theoretical calculations. The relevance of the phase-diagram domains to three phases in coexistence will be discussed. PMID:20113064

Lai, S K; Xiao, Xuhui

2010-01-28

386

Quantum corrected phase diagram of holographic fermions  

NASA Astrophysics Data System (ADS)

We study the phases of strongly correlated electron systems in two spatial dimensions in the framework of AdS4/CFT3 correspondence. The AdS (gravity) model consists of a Dirac fermion coupled to electromagnetic field and gravity. To classify the ground states of strongly correlated electrons on the CFT side and to construct the full phase diagram of the system, we construct a quantum many-body model of bulk fermion dynamics, based on the WKB approximation to the Dirac equation. At low temperatures, we find a quantum corrected approximation to the electron star where the edge is resolved in terms of wave functions extended fully through AdS. At high temperatures, the system exhibits a first order thermal phase transition to a charged AdS-RN black hole in the bulk and the emergence of local quantum criticality on the CFT side. This change from the third order transition experienced by the semi-classical electron star restores the intuition that the transition between the critical AdS-RN liquid and the finite density Fermi system is of van der Waals liquid-gas type.

Medvedyeva, Mariya V.; Gubankova, Elena; ?ubrovi?, Mihailo; Schalm, Koenraad; Zaanen, Jan

2013-12-01

387

Diagram of Cell to Cell Communication  

NASA Technical Reports Server (NTRS)

Diagram depicts the importance of cell-cell communication as central to the understanding of cancer growth and progression, the focus of the NASA bioreactor demonstration system (BDS-05) investigation. Microgravity studies will allow us to unravel the signaling and communication between these cells with the host and potential development of therapies for the treatment of cancer metastasis. The NASA Bioreactor provides a low turbulence culture environment which promotes the formation of large, three-dimensional cell clusters. Due to their high level of cellular organization and specialization, samples constructed in the bioreactor more closely resemble the original tumor or tissue found in the body. The Bioreactor is rotated to provide gentle mixing of fresh and spent nutrient without inducing shear forces that would damage the cells. The work is sponsored by NASA's Office of Biological and Physical Research. The bioreactor is managed by the Biotechnology Cell Science Program at NASA's Johnson Space Center (JSC). NASA-sponsored bioreactor research has been instrumental in helping scientists to better understand normal and cancerous tissue development. In cooperation with the medical community, the bioreactor design is being used to prepare better models of human colon, prostate, breast and ovarian tumors. Cartilage, bone marrow, heart muscle, skeletal muscle, pancreatic islet cells, liver and kidney are just a few of the normal tissues being cultured in rotating bioreactors by investigators. Credit: Emory University.

2002-01-01

388

Schematic diagram of (VDT) - open throat design  

NASA Technical Reports Server (NTRS)

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

1928-01-01

389

The Self-Calibrating Hubble Diagram  

E-print Network

As an increasing number of well measured type Ia supernovae (SNe Ia) become available, the statistical uncertainty on w has been reduced to the same size as the systematic uncertainty. The statistical error will decrease further in the near future, and hence the improvement of systematic uncertainties needs to be addressed, if further progress is to be made. We study how uncertainties in the primary reference spectrum - which are a main contribution to the systematic uncertainty budget - affect the measurement of the Dark Energy equation of state parameter w from SNe Ia. The increasing number of SN observations can be used to reduce the uncertainties by including perturbations of the reference spectrum as nuisance parameters in a cosmology fit, thus "self-calibrating" the Hubble diagram. We employ this method to real SNe data for the first time and find the perturbations of the reference spectrum consistent with zero at the 1%-level. For future surveys we estimate that ~3500 SNe will be required for our metho...

Feindt, Ulrich; Paech, Kerstin

2012-01-01

390

Improving perturbation theory with cactus diagrams  

E-print Network

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 fermion masses, and the multiplicative renormalization Z_V (Z_A) of the vector (axial) current. In many cases where non-perturbative estimates of renormalization functions are also available for comparison, the agreement with improved perturbative results is consistently better as compared to results from bare perturbation theory.

Martha Constantinou; Haralambos Panagopoulos; Apostolos Skouroupathis

2006-12-04

391

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

ERIC Educational Resources Information Center

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

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

2013-01-01

392

[Social class and health].  

PubMed

This publication deals with the German social class and their interactions with health or illness. The analysis uses the data of the German National Health Interview and Examination Survey 1998. The results are as follows: During the last decade the proportion of inhabitants of lower social class has decreased in favour of the proportions of middle and upper social classes. The formerly observed differences between the eastern part (former GDR) and the western part of Germany have diminished or have even levelled to zero. Even today men in Germany belong more often to the upper social class than women. For the risk factors smoking, massive obesity and inactivity in sports a distinct gradient concerning the social class can be observed. Those belonging to lower social class are more often smokers, have significantly more often massive obesity and show more seldom activities in sports. Hypertension and hypercholesterolemia are more often observed in men of the upper social class than in those belonging to lower class while for women both mentioned risk factors are more often seen in the lower social class. With respect to morbidity different patterns can be observed. NIDDM, chronic bronchitis and gastric and duodenal ulcer are examples for higher prevalence data in the lower social class while allergic rhinitis can be observed more often in the higher class. The level of complaints is higher in the lower class than in the upper class. By differentiating according to the eastern or western part clear differences emerge concerning social class especially in the 'old Bundesländer' (western part). Members of the upper class estimates their health status clearly to be better than those study participants belonging to the lower class. This perhaps can be explained by their lower level of complaints. The contentedness concerning live and health-status is higher in the upper than in the lower class. Respecting the highest level of education, class-specific differences concerning drug utilization are observed doubly frequent in the 'old Bundesländer' compared to the 'new Bundesländer'. According to the level of complaints and the prevalence of diseases most drug groups are used more often in the lower than in the upper class whereas drugs with presumed preventive potential are clearly more often consumed in the upper class. PMID:10726417

Knopf, H; Ellert, U; Melchert, H U

1999-12-01

393

A class of three-loop models with neutrino mass and dark matter  

NASA Astrophysics Data System (ADS)

We study a class of three-loop models for neutrino mass in which dark matter plays a key role in enabling the mass diagram. The simplest models in this class have Majorana dark matter and include the proposal of Krauss, Nasri and Trodden; we identify the remaining related models, including the viable colored variants. The next-to-simplest models use either more multiplets and/or a slight modification of the loop-diagram, and predict inert N-tuplet scalar dark matter.

Chen, Chian-Shu; McDonald, Kristian L.; Nasri, Salah

2014-06-01

394

A Class of Three-Loop Models with Neutrino Mass and Dark Matter  

E-print Network

We study a class of three-loop models for neutrino mass in which dark matter plays a key role in enabling the mass diagram. The simplest models in this class have Majorana dark matter and include the proposal of Krauss, Nasri and Trodden; we identify the remaining related models, including the viable colored variants. The next-to-simplest models use either more multiplets and/or a slight modification of the loop-diagram, and predict inert N-tuplet scalar dark matter.

Chian-Shu Chen; Kristian L. McDonald; Salah Nasri

2014-06-05

395

Extra Equilibrium Exercises for ESRP 550 Students For Students in the Nitrogen Cycling class (Teams of Two)  

E-print Network

Extra Equilibrium Exercises for ESRP 550 Students For Students in the Nitrogen Cycling class (Teams of Two) This exercise is for ESRP 550 students in the Nitrogen Cycling class (Professor Evans and Pan and the phosphorus cycle. But the nitrogen cycle is missing. Your assignment is to draw a stock and flow diagram

Ford, Andrew

396

Energetic Studies and Phase Diagram of Thioxanthene  

NASA Astrophysics Data System (ADS)

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

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

2009-10-01

397

The high-z quasar Hubble Diagram  

NASA Astrophysics Data System (ADS)

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

Melia, Fulvio

2014-01-01

398

Vector (butterfly) diagrams for osteoarthritic gait: a preliminary report.  

PubMed

This paper describes briefly a simple three-dimensional vector diagram display combining all the force components of gait in one diagram. The locus of the centre of pressure of the feet on the ground is fully illustrated. This provides a useful reference for the consideration of the position of the centre of body mass over one foot or the other. In the case of some pathological gaits, the lateral displacement can be substantial. The traditional two-dimensional diagram fails to show some of these effects. PMID:3361599

Khodadadeh, S

1988-01-01

399

Sloan Digital Sky Survey - H-R Diagram  

NSDL National Science Digital Library

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

400

47 CFR 73.25 - Clear channels; Class A, Class B and Class D stations.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Clear channels; Class A, Class B and Class D stations...Broadcast Stations § 73.25 Clear channels; Class A, Class B and Class D stations...following tabulations are designated as clear channels and assigned for use by the Classes...

2011-10-01

401

47 CFR 73.25 - Clear channels; Class A, Class B and Class D stations.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Clear channels; Class A, Class B and Class D stations...Broadcast Stations § 73.25 Clear channels; Class A, Class B and Class D stations...following tabulations are designated as clear channels and assigned for use by the Classes...

2012-10-01

402

47 CFR 73.25 - Clear channels; Class A, Class B and Class D stations.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Clear channels; Class A, Class B and Class D stations...Broadcast Stations § 73.25 Clear channels; Class A, Class B and Class D stations...following tabulations are designated as clear channels and assigned for use by the Classes...

2013-10-01

403

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

Code of Federal Regulations, 2012 CFR

...Ship station tools, instruction books, circuit diagrams and testing equipment. 80...Ship station tools, instruction books, circuit diagrams and testing equipment. ...testing equipment, instruction books and circuit diagrams to enable the...

2012-10-01

404

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

Code of Federal Regulations, 2011 CFR

...Ship station tools, instruction books, circuit diagrams and testing equipment. 80...Ship station tools, instruction books, circuit diagrams and testing equipment. ...testing equipment, instruction books and circuit diagrams to enable the...

2011-10-01

405

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

Code of Federal Regulations, 2013 CFR

...Ship station tools, instruction books, circuit diagrams and testing equipment. 80...Ship station tools, instruction books, circuit diagrams and testing equipment. ...testing equipment, instruction books and circuit diagrams to enable the...

2013-10-01

406

Methods and Technologies of XML Data Modeling for IP Mode Intelligent Measuring & Controlling System  

NASA Astrophysics Data System (ADS)

This paper presents the IP mode intelligent measuring & controlling system (IMIMCS). Based on object-oriented modeling technology of UML and XML Schema, the innovative methods and technologies of some key problems for XML data modeling in the IMIMCS were especially discussed, including refinement for systemic business by means of use-case diagram of UML, the confirmation of the content of XML data model and logic relationship of the objects of XML Schema with the aid of class diagram of UML, the mapping rules from the UML object model to XML Schema. Finally, the application of the IMIMCS based on XML for a modern greenhouse was presented. The results show that the modeling methods of the measuring & controlling data in the IMIMCS involving the multi-layer structure and many operating systems process strong reliability and flexibility, guarantee uniformity of complex XML documents and meet the requirement of data communication across platform.

Liu, G. X.; Hong, X. B.; Liu, J. G.

2006-10-01

407

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

NSDL National Science Digital Library

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

Maries, Alexandru; Singh, Chandralekha

2013-07-17

408

Mineral classification revisited: use of quasiternary diagrams in the visualization of compositional distribution of inorganic material in coal  

SciTech Connect

A comparative study to determine the elemental composition of individual inorganic particles in the Pittsburgh No. 8 coal sample has been carried out with two different magnifications by SEM-EDS. The classification of particles into mineral classes left 30-40% of the particles unclassified. It was deduced that the sample contained the following minerals: calcite, kaolinite, pyrite, quartz, apatite, muscovite, and montmorillonite. The information of the compositional distribution of inorganic material in the coal sample is enhanced by use of the quasiternary diagrams. Minerals, such as apatite, calcite, pyrite, and quartz, can clearly be identified from the quasiternary diagram. A suitable elemental definition of the three corners in the quasiternary diagram enables the discussion of the compositional distribution and identity of the inorganic material that remains unclassified in the mineral classification. By combining the information from mineral classification and quasiternary diagrams, the composition of the inorganic material of the coal sample can be understood. This information can be used in the prediction of ash-related problems regardless of the fuel type. 50 refs., 6 figs., 2 tabs.

Heikki J. Ollila; Jouni H.A. Daavitsainen; Laura H. Nuutinen; Minna S. Tiainen; Mika E. Virtanen; Risto S. Laitinen [University of Oulu, Oulu (Finland). Department of Chemistry

2006-03-15

409

Activity Class for Credit Intermediate Volleyball Class Title Lead  

E-print Network

Activity Class for Credit Intermediate Volleyball Credit/ Hours Class Title Lead Instructor Email Office Hours 1 ACT 209 Alese Larson aleselarson@gmail.com Upon request Class Title: ACT 209 Intermediate Volleyball Class Begin: August 26, 2014 Class Ends: December 4, 2014 Class Meeting Days/Times: Tuesdays

Maxwell, Bruce D.

410

Activity Class for Credit Beginning Volleyball Class Title Lead  

E-print Network

Activity Class for Credit Beginning Volleyball Credit/ Hours Class Title Lead Instructor Email Office Hours 1 ACT 180-002 Alese Larson aleselarson@gmail.com Upon request Class Title: ACT 180-002 Beginning Volleyball Class Begin: August 26, 2014 Class Ends: December 4, 2014 Class Meeting Days

Maxwell, Bruce D.

411

Activity Class for Credit Beginning Basketball Class Title Lead  

E-print Network

Activity Class for Credit Beginning Basketball Credit/ Hours Class Title Lead Instructor Email Office Hours 1 ACT 140-001 Shawn Dirden Shawn.dirden@montana.edu Upon request Class Title: ACT 140-001 Beginning Basketball Class Begin: August 26, 2013 Class Ends: December 4, 2013 Class Meeting Days

Maxwell, Bruce D.

412

Activity Class for Credit Beginning Volleyball Class Title Lead  

E-print Network

Activity Class for Credit Beginning Volleyball Credit/ Hours Class Title Lead Instructor Email Phone Office Hours 1 ACT 180-001 Justin Jessop jjessop@montana.edu 406-994- 2402 Upon request Class Title: ACT 180-001 Beginning Volleyball Class Begin: August 26, 2014 Class Ends: December 4, 2014 Class

Maxwell, Bruce D.

413

Activity Class for Credit: Wallyball Class Title Lead  

E-print Network

Activity Class for Credit: Wallyball Credit/ Hours Class Title Lead Instructor Email Office Hours 1 Wallyball ACT 116 Alese Larson aleselarson@gmail.com Upon request Class Title: ACT 116 Wallyball Class Begin: August 26, 2014 Class Ends: December 4, 2014 Class Meeting Days/Times: Tuesdays & Thursdays 2:05 ­ 2

Maxwell, Bruce D.

414

Activity Class for Credit Intermediate Basketball Class Title Lead  

E-print Network

Activity Class for Credit Intermediate Basketball Credit/ Hours Class Title Lead Instructor Email day 1 to make sure you are in the appropriate ACT basketball course Class Title: ACT 240-001 Intermediate Basketball Class Begin: August 25, 2014 Class Ends: December 3, 2014 Class Meeting Days

Maxwell, Bruce D.

415

Ferrian Ilmenites: Investigating the Magnetic Phase Diagram  

NASA Astrophysics Data System (ADS)

The main objective of this study is to investigate the magnetic phase changes within the hematite-ilmenite solid solution, yFeTiO3·(1-y)·Fe2O3. Two sets of synthetic ferrian ilmenites of y-values equal to 0.7, 0.8, 0.9, and 1.0 were available for this study. As currently drawn, the magnetic phase diagram, proposed by Ishikawa et al. [1985, J. Phys. Soc. Jpn. v.54, 312-325], predicts for increasing y values (0.5

Lagroix, F.

2007-12-01

416

Using Fluid Inclusions to Bring Phase Diagrams to Life in a Guided Inquiry Instructional Setting  

NASA Astrophysics Data System (ADS)

A fundamental concept in mineralogy, petrology, and geochemistry is the generation and interpretation of phase diagrams for various systems. We have developed an exercise to strengthen student's familiarity with and confidence in employing phase diagrams by using fluid inclusions. The activity follows the 5Es (Engagement, Exploration, Explanation, Extension, Evaluation) guided inquiry instructional model in order to best facilitate student learning. The exercise follows an activity adapted from Brady (1992) wherein students collect data to generate the phase diagram for the Ice-Water-NaCl system. The engagement activity involves using a USGS-type fluid inclusion heating-cooling stage with a camera and projection system. We typically employ either a doubly-polished quartz sample or a cleaved section of fluorite and select a typical two phase (L + V) aqueous inclusion. Students first observe the inclusion at room temperature and pressure and are asked to predict what would happen if the sample is heated. Students then watch as the sample is heated to its homogenization temperature (Th) and are asked to explain what they see. The sample is then cooled until completely frozen and then slowly warmed until the first ice melting (at the eutectic, Te) and then until all ice melts (Tm). Again, students are asked to explain what they see and, if necessary, they are guided to remember the earlier phase diagram activity. The process is then repeated while students follow along the appropriate phase diagrams. In this fashion, students literally see the changes in phases present and their relative abundances as they move through the phase diagram. The engagement activity generates student interest in the exercise to insure minds-on as well as hands-on exploration. The exploration activities involve students observing and describing a wide range of fluid inclusion types (e.g., CO2, daughter crystals, multiple inclusion trails, etc) and hands-on collection of Th and Tm data for a selected sample. Using a fluorite sample (Denton Mine) yields excellent results and a meaningful extension activity. Each student collects Th and Tm data that are then combined and class histograms are generated and interpreted. At this point, a general explanation of fluid inclusions is provided to bring together the student's observations and to assess their understanding. The extension activity involves using the Th, Te, and Tm data obtained for primary inclusions to constrain the true trapping temperature (Tt). The isochore is calculated and plotted on a P-T plot. Using the geothermal gradient for the sample locale, students calculate the hydrostatic and lithostatic gradients for the region and plot these on the P-T diagram in order to constrain the possible range in Tt. Finally, based upon the salinity and Tt range, students determine what ore fluid type is represented (MVT). The evaluation includes observation of participation, answers to questions posed during the engagement activity, and a written report that includes answers to refining and open-ended questions as well as a reflection on their learning. This activity strengthens student's understanding of phase diagrams while introducing them to the importance of fluids in the crust.

Farver, J. R.; Onasch, C.

2011-12-01

417

Adding Value to Force Diagrams: Representing Relative Force Magnitudes  

NASA Astrophysics Data System (ADS)

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.1-4 Yet some instructors worry that too few students perceive the conceptual and problem-solving utility of force diagrams,4-6 and over recent years a rich variety of approaches has been proposed to add value to force diagrams. Suggestions include strategies for identifying candidate forces,6,7 emphasizing the distinction between "contact" and "noncontact" forces,5,8 and the use of computer-based tutorials.9,10 Instructors have suggested a variety of conventions for constructing force diagrams, including approaches to arrow placement and orientation2,11-13 and proposed notations for locating forces or marking action-reaction force pairs.8,11,14,15

Wendel, Paul

2011-05-01

418

129. PLAN OF IMPROVEMENT, HUNTINGTON BEACH MUNICIPAL PIER: LIGHTING DIAGRAM. ...  

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

129. PLAN OF IMPROVEMENT, HUNTINGTON BEACH MUNICIPAL PIER: LIGHTING DIAGRAM. Sheet lO of 11 (#3283) - Huntington Beach Municipal Pier, Pacific Coast Highway at Main Street, Huntington Beach, Orange County, CA

419

Plan of North Approach, Plan of South Approach, Diagram of ...  

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

Plan of North Approach, Plan of South Approach, Diagram of Camber, Detail of Framing of Arch Member of Bottom Chord, Isometric of T Blocks in Bottom Chord - Wood-Covered Bridge, Spanning Main Licking River, Butler, Pendleton County, KY

420

Heuristic Diagrams as a Tool to Teach History of Science  

NASA Astrophysics Data System (ADS)

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

Chamizo, José A.

2012-05-01

421

Using ordered partial decision diagrams for manufacture test generation  

E-print Network

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

Cobb, Bradley Douglas

2004-09-30

422

Influence diagrams as oil spill decision science tools  

EPA Science Inventory

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

423

Architecture flow diagrams under teamwork{reg_sign}  

SciTech Connect

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

Nicinski, T.

1992-02-01

424

Phase diagram of water: The principle of group cosubjection  

NASA Astrophysics Data System (ADS)

The pT phase diagram topology of water, including textures, is established, assuming that structural phase transitions do not change the molecule intrinsic symmetry and local symmetry in Wyckoff positions, but correspond to a group-subgroup cosubjection.

Lyakhov, G. A.; Mazo, D. M.

2002-02-01

425

Online, Bigger Classes May Be Better Classes  

ERIC Educational Resources Information Center

In his work as a professor, Stephen Downes used to feel that he was helping those who least needed it. His students at places like the University of Alberta already had a leg up in life and could afford the tuition. When a colleague suggested they co-teach an online class in learning theory at the University of Manitoba, in 2008, Downes welcomed…

Parry, Marc

2010-01-01

426

Limits to Open Class Performance?  

NASA Technical Reports Server (NTRS)

This viewgraph presentation describes the limits to open class performance. The contents include: 1) Standard Class; 2) 15m/Racing Class; 3) Open Class; and 4) Design Solutions associated with assumptions, limiting parameters, airfoil performance, current trends, and analysis.

Bowers, Albion H.

2007-01-01

427

Archform Comparisons between Skeletal Class II and III Malocclusions  

PubMed Central

The purpose of this cross-sectional research was to explore the relationship of the mandibular dental and basal bone archforms between severe Skeletal Class II (SC2) and Skeletal Class III (SC3) malocclusions. We also compared intercanine and intermolar widths in these two malocclusion types. Thirty-three virtual pretreatment mandibular models (Skeletal Class III group) and Thirty-five Skeletal Class II group pretreatment models were created with a laser scanning system. FA (the midpoint of the facial axis of the clinical crown)and WALA points (the most prominent point on the soft-tissue ridge)were employed to produce dental and basal bone archforms, respectively. Gained scatter diagrams of the samples were processed by nonlinear regression analysis via SPSS 17.0. The mandibular dental and basal bone intercanine and intermolar widths were significantly greater in the Skeletal Class III group compared to the Skeletal Class II group. In both groups, a moderate correlation existed between dental and basal bone arch widths in the canine region, and a high correlation existed between dental and basal bone arch widths in the molar region. The coefficient of correlation of the Skeletal Class III group was greater than the Skeletal Class II group. Fourth degree, even order power functions were used as best-fit functions to fit the scatter plots. The radius of curvature was larger in Skeletal Class III malocclusions compared to Skeletal Class II malocclusions (rWALA3>rWALA2>rFA3>rFA2). In conclusion, mandibular dental and basal intercanine and intermolar widths were significantly different between the two groups. Compared with Skeletal Class II subjects, the mandibular archform was more flat for Skeletal Class III subjects. PMID:24971597

Jiang, JiuHui; Xu, TianMin; Li, CuiYing

2014-01-01

428

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

Microsoft Academic Search

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

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

2009-01-01

429

Construction of Penrose Diagrams for Dynamic Black Holes  

NASA Technical Reports Server (NTRS)

A set of Penrose diagrams is constructed in order to examine the large-scale causal structure of black holes with dynamic horizons. Coordinate dependencies of significant features, such as the event horizon and radial mass scale, are demonstrated on the diagrams. Unlike in static Schwarzschild geometries, the radial mass scale is clearly seen to differ from the horizon. Trajectories for photons near the horizon are briefly discussed.

Brown, Beth A.; Lindesay, James

2008-01-01

430

Modelling the phase diagram of magnetic shape memory Heusler alloys  

Microsoft Academic Search

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

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

2006-01-01

431

Fast computation of Generalized Voronoi Diagrams Using Graphics Hardware  

Microsoft Academic Search

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

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

2000-01-01

432

Dodecagonal space vector diagram using cascaded H-Bridge inverters  

Microsoft Academic Search

This paper proposes the development of dodecagonal (12-sided) space vector diagrams from cascaded H-Bridge inverters. As already reported in literatures, dodecagonal space vector diagrams have many advantages over conventional hexagonal ones. Some of them include the absence of 6n±1, (n=odd) harmonics from the phase voltage, and the extension of the linear modulation range. In this paper, a new power circuit

Anandarup Das; K. Mathew; Chintan Patel; Rijil Ramchand; K. Gopakumar

2010-01-01

433

The Life Cycle of the Star/H-R Diagram  

NSDL National Science Digital Library

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

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

2011-10-14

434

CALCULATING ASTEROSEISMIC DIAGRAMS FOR SOLAR-LIKE OSCILLATIONS  

SciTech Connect

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

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

2011-12-20

435

A preoperative serum signature of CEA(+) /CA125(+) /CA19-9???1000 U/mL indicates poor outcome to pancreatectomy for pancreatic cancer.  

PubMed

Pancreatectomy is associated with significant morbidity and unpredictable outcome, with few diagnostic tools to determine, which patients gain the most benefit from this treatment, especially before the operation. This study aimed to define a preoperative signature panel of serum markers to indicate response to pancreatectomy for pancreatic cancer. Over 1000 patients with pancreatic cancer treated at two independent high-volume institutions were included in this study and were divided into three groups, including resected, locally advanced and metastatic. Eight serum tumor markers most commonly used in gastrointestinal cancers were analyzed for patient outcome. Preoperative CA19-9 independently indicated surgical response in pancreatic cancer. Patients with CA19-9 ?1000 U/mL generally had a poor surgical benefit. However, a subset of these patients still achieved a survival advantage when CA19-9 levels decreased postoperatively. CEA and CA125 in the presence of CA19-9 ?1000 U/mL could independently predict the non-decrease of CA19-9 postoperatively. The combination of the three markers was useful for predicting a worse surgical outcome with a median survival of 5.1 months vs. 23.0 months (p?U/mL is associated with poor surgical outcome and can be used to select appropriate patients with pancreatic cancer for pancreatectomy. PMID:25273947

Liu, Liang; Xu, Huaxiang; Wang, Wenquan; Wu, Chuntao; Chen, Yong; Yang, Jingxuan; Cen, Putao; Xu, Jin; Liu, Chen; Long, Jiang; Guha, Sushovan; Fu, Deliang; Ni, Quanxing; Jatoi, Aminah; Chari, Suresh; McCleary-Wheeler, Angela L; Fernandez-Zapico, Martin E; Li, Min; Yu, Xianjun

2015-05-01

436

Bayesian Hierarchical Classes Analysis  

ERIC Educational Resources Information Center

Hierarchical classes models are models for "N"-way "N"-mode data that represent the association among the "N" modes and simultaneously yield, for each mode, a hierarchical classification of its elements. In this paper we present a stochastic extension of the hierarchical classes model for two-way two-mode binary data. In line with the original…

Leenen, Iwin; Van Mechelen, Iven; Gelman, Andrew; De Knop, Stijn

2008-01-01

437

The Question of Class  

ERIC Educational Resources Information Center

For too long, educators' approach to understanding the relationships between poverty, class and education has been framed by studying the behaviors and cultures of poor students and their families. If only we--in the middle and upper-middle classes--can understand "their" culture, why "those people" don't value education, why "those parents" don't…

Gorski, Paul C.

2007-01-01

438

The Conversation Class  

ERIC Educational Resources Information Center

The conversation class occupies a unique place in the process of learning English as a second or foreign language. From the author's own experience in conducting special conversation classes with Persian-speaking adults, he has drawn up a number of simple but important guidelines, some of which he hopes may provide helpful suggestions for the…

Jackson, Acy L.

2012-01-01

439

Ab initio molecular crystal structures, spectra, and phase diagrams.  

PubMed

Conspectus Molecular crystals are chemists' solids in the sense that their structures and properties can be understood in terms of those of the constituent molecules merely perturbed by a crystalline environment. They form a large and important class of solids including ices of atmospheric species, drugs, explosives, and even some organic optoelectronic materials and supramolecular assemblies. Recently, surprisingly simple yet extremely efficient, versatile, easily implemented, and systematically accurate electronic structure methods for molecular crystals have been developed. The methods, collectively referred to as the embedded-fragment scheme, divide a crystal into monomers and overlapping dimers and apply modern molecular electronic structure methods and software to these fragments of the crystal that are embedded in a self-consistently determined crystalline electrostatic field. They enable facile applications of accurate but otherwise prohibitively expensive ab initio molecular orbital theories such as Møller-Plesset perturbation and coupled-cluster theories to a broad range of properties of solids such as internal energies, enthalpies, structures, equation of state, phonon dispersion curves and density of states, infrared and Raman spectra (including band intensities and sometimes anharmonic effects), inelastic neutron scattering spectra, heat capacities, Gibbs energies, and phase diagrams, while accounting for many-body electrostatic (namely, induction or polarization) effects as well as two-body exchange and dispersion interactions from first principles. They can fundamentally alter the role of computing in the studies of molecular crystals in the same way ab initio molecular orbital theories have transformed research practices in gas-phase physical chemistry and synthetic chemistry in the last half century. In this Account, after a brief summary of formalisms and algorithms, we discuss applications of these methods performed in our group as compelling illustrations of their unprecedented power in addressing some of the outstanding problems of solid-state chemistry, high-pressure chemistry, or geochemistry. They are the structure and spectra of ice Ih, in particular, the origin of two peaks in the hydrogen-bond-stretching region of its inelastic neutron scattering spectra, a solid-solid phase transition from CO2-I to elusive, metastable CO2-III, pressure tuning of Fermi resonance in solid CO2, and the structure and spectra of solid formic acid, all at the level of second-order Møller-Plesset perturbation theory or higher. PMID:24754304

Hirata, So; Gilliard, Kandis; He, Xiao; Li, Jinjin; Sode, Olaseni

2014-09-16

440

Galaxy evolution across the optical emission-line diagnostic diagrams?  

NASA Astrophysics Data System (ADS)

Context. The discovery of the M - ? relation, the local galaxy bimodality, and the link between black-hole and host-galaxy properties have raised the question of whether active galactic nuclei (AGN) play a role in galaxy evolution. AGN feedback is one of the biggest observational challenges of modern extragalactic astrophysics. Several theoretical models implement AGN feedback to explain the observed galaxy luminosity function and, possibly, the color and morphological transformation of spiral galaxies into passive ellipticals. Aims: For understanding the importance of AGN feedback, a study of the AGN populations in the radio-optical domain is crucial. A mass sequence linking star-forming galaxies and AGN has already been noted in previous works, and it is now investigated as a possible evolutionary sequence. Methods: We observed a sample of 119 intermediate-redshift (0.04 ? z< 0.4) SDSS-FIRST radio emitters with the Effelsberg 100-m telescope at 4.85 and 10.45 GHz and obtained spectral indices. The sample includes star-forming galaxies, composite galaxies (with mixed contribution to line emission from star formation and AGN activity), Seyferts, and low ionization narrow emission region (LINER) galaxies. With these sources we search for possible evidence of spectral evolution and a link between optical and radio emission in intermediate-redshift galaxies. Results: We find indications of spectral index flattening in high-metallicity star-forming galaxies, composite galaxies, and Seyferts. This "flattening sequence" along the [NII]-based emission-line diagnostic diagram is consistent with the hardening of galaxy ionizing field, thanks to nuclear activity. After combining our data with FIRST measurements at 1.4 GHz, we find that the three-point radio spectra of Seyferts and LINERs show substantial differences, which are attributable to small radio core components and larger (arcsecond sized) jet/lobe components, respectively. A visual inspection of FIRST images seems to confirm this hypothesis. Conclusions: Galaxies along this sequence are hypothesized to be transitioning from the active star-forming galaxies (blue cloud) to the passive elliptical galaxies (red sequence). This supports the suggestion that AGN both play a role in shutting down star formation and allow the transition from one galaxy class to the other. Appendix A is available in electronic form at http://www.aanda.org

Vitale, M.; Fuhrmann, L.; García-Marín, M.; Eckart, A.; Zuther, J.; Hopkins, A. M.

2015-01-01

441

Planar diagrams from optimization for concave potentials.  

PubMed

We propose a toy model of a heteropolymer chain capable of forming planar secondary structures typical for RNA molecules. In this model, the sequential intervals between neighboring monomers along a chain are considered as quenched random variables, and energies of nonlocal bonds are assumed to be concave functions of those intervals. A few factors are neglected: the contribution of loop factors to the partition function, the variation in energies of different types of complementary nucleotides, the stacking interactions, and constraints on the minimal size of loops. However, the model captures well the formation of folded structures without pseudoknots in an arbitrary sequence of nucleotides. Using the optimization procedure for a special class of concave-type potentials, borrowed from optimal transport analysis, we derive the local difference equation for the ground state free energy of the chain with the planar (RNA-like) architecture of paired links. We consider various distribution functions of intervals between neighboring monomers (truncated Gaussian and scale free) and demonstrate the existence of a topological crossover from sequential to essentially nested configurations of paired links. PMID:23410278

Nechaev, S K; Sobolevski, A N; Valba, O V

2013-01-01

442

47 CFR 73.25 - Clear channels; Class A, Class B and Class D stations.  

Code of Federal Regulations, 2010 CFR

...channels; Class A, Class B and Class D stations. 73.25 Section 73.25 Telecommunication...RADIO BROADCAST SERVICES AM Broadcast Stations § 73.25 Clear channels; Class A, Class B and Class D stations. The frequencies in the...

2010-10-01

443

A new class of room temperature molten salts for battery applications  

Microsoft Academic Search

Salts that are liquid at room temperature would provide a completely ionic electrolyte for rechargeable batteries without the penalty of high operating temperatures. We have discovered and characterized a new class of molten salts that are liquids considerably below room temperature. The new materials are mixtures of dialkyimidazolium chlorides and aluminum chloride. The solid-liquid phase diagram of one member of

J. S. Wilkes; J. A. Levisky; J. S. Landers; R. L. Vaughn; C. L. Hussey; D. A. Floreani; D. J. Stech

1981-01-01

444

TUESDAYTUESDAY Class Room Time  

E-print Network

Indoor Cycling 1110 6:30-7:30pm Judo 2040 7:00-9:00pm WEDNESDAYWEDNESDAY Class Room Time Bootcamp 2015 12:00-1:00pm CoreX 2025 5:15-5:45pm Yoga 2015 5:15-6:15pm Bootcamp 2015 6:30-7:30pm Judo 2040 7:00-9:00pm 12:15-12:45pm Bootcamp 2015 5:15-6:15pm Judo 2040 7:00-9:00pm No Classes:No Classes: Monday, May 26

Hemmers, Oliver

445

Using Memory Diagrams When Teaching a Java-Based CS1  

E-print Network

Using Memory Diagrams When Teaching a Java-Based CS1 Mark A. Holliday and David Luginbuhl-oriented concepts. We believe that a type of diagram that we call a memory diagram can be an effective visualization tool for the beginning object-oriented programmer. Memory diagrams differ from more well-known object

Holliday, Mark A.

446

A HR-like Diagram for Solar/Stellar Flares and Corona -- Emission Measure vs Temperature Diagram  

E-print Network

In our previous paper, we have presented a theory to explain the observed universal correlation between the emission measure ($EM=n^2 V$) and temperature (T) for solar/stellar flares on the basis of the magnetic reconnection model with heat conduction and chromospheric evaporation. Here n is the electron density and V is the volume. By extending our theory to general situations, we examined the EM-T diagram in detail, and found the following properties: 1) The universal correlation sequence (``main sequence flares'') with $EM \\propto T^{17/2}$ corresponds to the case of constant heating flux or equivalently the case of constant magnetic field strength in the reconnection model. 2) The EM-T diagram has a forbidden region, where gas pressure of flares exceeds magnetic pressure. 3) There is a coronal branch with $EM \\propto T^{15/2}$ for $T 10^7$ K. This branch is situated left side of the main sequence flares in the EM-T diagram. 4) There is another forbidden region determined by the length of flare loop; a lower limit of flare loop is $10^7$ cm. Small flares near this limit correspond to nanoflares observed by SOHO/EIT. 5) We can plot flare evolution track on the EM-T diagram. A flare evolves from the coronal branch to main sequence flares, then returns to the coronal branch eventually. These properties of the EM-T diagram are similar to those of the HR diagram for stars, and thus we propose that the EM-T diagram is quite useful to estimate the physical quantities (loop length, heating flux, magnetic field strength, total energy and so on) of flares and corona when there is no spatially resolved imaging observations.

Kazunari Shibata; Takaaki Yokoyama

2002-06-03

447

Classes of Heart Failure  

MedlinePLUS

... Blood Pressure Tools & Resources Stroke More Classes of Heart Failure Updated:Dec 17,2014 Doctors usually classify patients' ... is classified: Functional Capacity IV, Objective Assessment A Heart Failure Questions to Ask Your Doctor Use these questions ...

448

Constructing mammography examination process ontology using affinity diagram and hierarchical task analysis.  

PubMed

Mammography is complex and difficult for beginner radiologic technologists (RTs) because knowledge and technical skills rely on one's experience, and it is often difficult for experienced RTs to verbally explain the process to co-workers or beginners. The purpose of this study was to construct a mammography examination process ontology for knowledge sharing among RTs and propose a new ontology construction method using an affinity diagram (AD) and hierarchical task analysis (HTA). First, tasks collected by brainstorming were clustered and connected using the AD. Subsequently, a hierarchical structure was constructed based on the clusters and relations determined in the AD. Finally, a mammography process ontology was determined based on the relations noted in the AD and HTA. As a result, the ontology contained 203 classes and 669 relations. PMID:23920833

Yagahara, Ayako; Tsuji, Shintarou; Fukuda, Akihisa; Yokooka, Yuki; Nishimoto, Naoki; Kurowarabi, Kunio; Ogasawara, Katsuhiko

2013-01-01

449

Supernova Classes and Subclasses  

E-print Network

The discovery of many objects with unprecedented, amazing observational characteristics caused the last decade to be the most prolific period for the supernova research. Many of these new supernovae are transitional objects between existing classes, others well enter within the defined classes, but still show unique properties. This makes the traditional classification scheme inadequate to take into account the overall SN variety and, consequently, requires the introduction of new subclasses.

M. Turatto; S. Benetti; A. Pastorello

2007-06-08

450

Stability diagrams of colliding beams in the Large Hadron Collider  

NASA Astrophysics Data System (ADS)

Most hadron synchrotrons rely on lattice nonlinearities for Landau damping of impedance driven coherent modes of oscillation. However, in a collider, the presence of beam-beam interactions strongly modifies the transverse amplitude detuning and therefore the resulting stability diagram. A numerical tool to evaluate the effect of beam-beam on the stability diagram has been developed and is used to discuss observations during different phases of the operational cycle of the Large Hadron Collider during the 2012 proton run. In particular, we show the evolution of the stability diagram when the strength of long range beam-beam interactions is increased, during the betatron squeeze. Also, we investigate the stability of beams colliding with a small transverse offset and compare to observations of instabilities when bringing the beams into collision and while leveling the luminosity.

Buffat, X.; Herr, W.; Mounet, N.; Pieloni, T.; White, S.

2014-11-01

451

Project Management Plan for the INEL technology logic diagrams  

SciTech Connect

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

Rudin, M.J.

1992-10-01

452

Project Management Plan for the INEL technology logic diagrams  

SciTech Connect

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

Rudin, M.J.

1992-10-01

453

Phase Diagram of Glass Forming Liquids with Randomly Pinned Particles  

E-print Network

Extensive molecular dynamics simulations are performed to determine the phase diagram of two model glass forming liquids in the presence of external quenched disorder. The quenched disorder is introduced in the system by randomly choosing a fraction $\\rho_{pin}$ of particles from an equilibrium configuration of the supercooled liquids at temperature $T$ and freezing them in space. The study of the dynamics of supercooled liquids with this type of quenched disorder has drawn a lot of attention in recent years due to theoretical predictions of the possibility of observing the ideal thermodynamic glass transition in such systems. In this Letter, we numerically examine this possibility by determining the phase diagram of the systems in the $\\rho_{pin}-T$ plane. We find that the phase diagram differs considerably from existing theoretical predictions and show that a rapid decrease in the kinetic fragility of the system with increasing pin concentration is a probable reason for this difference.

Saurish Chakrabarty; Smarajit Karmakar; Chandan Dasgupta

2014-05-14

454

Generation of Finite Life Distributional Goodman Diagrams for Reliability Prediction  

NASA Technical Reports Server (NTRS)

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

Kececioglu, D.; Guerrieri, W. N.

1971-01-01

455

A redetermination of the succinonitrile-water phase diagram  

NASA Technical Reports Server (NTRS)

The phase diagram of the water/succinonitrile system often used in modeling binary metallic alloys is determined experimentally using a laser scattering method. Triply distilled and zone-refined succinonitrile is placed in a jacketed water-cooled vessel with a magnetic mixer and a copper-constantan thermocouple, and the melting point is determined under vacuum and under Ar by observing the response of a photodiode placed opposite a laser source as the chamber is cooled and reheated. Then water is added, and the eutectic and monotectic temperatures and the entire phase diagram are determined under Ar. The results are presented in a table and graph and compared to those of Schreinemakers (1897): significant discrepancies are noted and attributed to impurities in the succinonitrile used by Schreinemakers. The importance of accurate phase diagrams for modeling binary alloys is stressed.

Smith, J. E., Jr.; Frazier, D. O.; Kaukler, W. F.

1984-01-01

456

The Effects of Perception of Efficacy and Diagram Construction Skills on Students' Spontaneous Use of Diagrams When Solving Math Word Problems  

Microsoft Academic Search

\\u000a Although diagram use is considered to be one of the most effective strategies for solving problems, reports from applied educational\\u000a research have noted that students lack spontaneity in using diagrams even when teachers extensively employ diagrams in instructions.\\u000a To address this problem, the present study investigated the effectiveness of teacher-provided verbal encouragement (VE) and\\u000a practice in drawing diagrams (PD), as

Yuri Uesaka; Emmanuel Manalo; Shin’ichi Ichikawa

2010-01-01

457

Influence Diagram Use With Respect to Technology Planning and Investment  

NASA Technical Reports Server (NTRS)

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

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

2009-01-01

458

Pharmacological distribution diagrams: a tool for de novo drug design.  

PubMed

Discriminant analysis applied to SAR studies using topological descriptors allows us to plot frequency distribution diagrams: a function of the number of drugs within an interval of values of discriminant function vs. these values. We make use of these representations, pharmacological distribution diagrams (PDDs), in structurally heterogeneous groups where generally they adopt skewed Gaussian shapes or present several maxima. The maxima afford intervals of discriminant function in which exists a good expectancy to find new active drugs. A set of beta-blockers with contrasted activity has been selected to test the ability of PDDs as a visualizing technique, for the identification of new beta-blocker active compounds. PMID:9097233

Gálvez, J; García-Domenech, R; de Gregorio Alapont, C; de Julián-Ortiz, J V; Popa, L

1996-10-01

459

Homework on Volcanic Rock Chemistry and Binary Phase Diagrams  

NSDL National Science Digital Library

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

Selverstone, Jane

460

Phase diagram of mechanically stretched DNA: The salt effect  

E-print Network

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

Amar Singh; Navin Singh

2014-09-05

461

Theoretical phase diagrams for solid H{sub 2}  

SciTech Connect

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

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

1993-07-01

462

Exploring the phase diagram of QCD with complex Langevin simulations  

E-print Network

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

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

2014-11-10

463

Adaptive Behavior for Fighting Game Characters  

E-print Network

all behavior ! Leads to a static world ! Promising game AI techniques[4]: ! Neural networks, genetic, vel, acc) ! Collision detection ­ spheres & capsules ! Collision reaction ­ body part state #12;Game Architecture: Collision Detection/Reaction Blocking Neutral Attacking Sphere Capsule h r #12;UML Class Diagram

Pollett, Chris

464

Exploring an MDA approach to health care information systems development  

Microsoft Academic Search

Objective To explore the potential of the model-driven architecture (MDA) in health care information systems development Methods An MDA is conceptualized and developed for a health clinic system to track patient information. A prototype of the MDA is implemented using an advanced MDA tool. The UML provides the underlying modeling support in the form of the class diagram. The PIM

Wullianallur Raghupathi; Amjad Umar

465

An approach for selective state machine based regression testing  

Microsoft Academic Search

Model-based regression testing is an important activity that ensures the reliability of evolving software. One of the major issues in this type of testing is the optimal selection of test-cases to test the affected portion of the software. In this paper, we present a UML based selective regression testing strategy that uses state machines and class diagrams for change identification.

Qurat-ul-ann Farooq; Muhammad Zohaib Z. Iqbal; Zafar I. Malik; Aamer Nadeem

2007-01-01

466

PostScript versions of Dynkin diagrams This note describes a package of encapsulated PostScript figures of Dynkin diagrams. They were first  

E-print Network

the plain Dynkin diagrams for the finite root systems: File Diagram an.eps bn.eps cn.eps dn.eps e6.eps e7.eps e8.eps f4.eps g2.eps Here are the corresponding affine diagrams: File Diagram anz.eps bnz.eps cnz.eps #12;PostScript versions of Dynkin diagrams 2 dnz.eps e6z.eps e7z.eps e8z.eps f4z.eps g2z.eps Here

Casselman, William

467

Revised P- T phase diagram of URu2Si2  

NASA Astrophysics Data System (ADS)

We present a revised pressure-temperature phase diagram of URu2Si2 determined from AC magnetic susceptibility, DC magnetization, and thermal expansion experiments. We have observed that the superconductivity does not coexist with a large moment antiferromagnetically ordered state which appears above a critical pressure.

Sato, N. K.; Uemura, S.; Motoyama, G.; Nishioka, T.

2006-05-01

468

Energy Diagram for the Catalytic Decomposition of Hydrogen Peroxide  

ERIC Educational Resources Information Center

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

Tatsuoka, Tomoyuki; Koga, Nobuyoshi

2013-01-01

469

40. Photograph of a line drawing. 'FLOW DIAGRAM FOR BUILDING ...  

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

40. Photograph of a line drawing. 'FLOW DIAGRAM FOR BUILDING G-1.' Holston Army Ammunition Plant, Holston Defense Corporation. December 1, 1965. Delineator: V. N.J. Drawing # 7651-1007-528. - Holston Army Ammunition Plant, RDX-and-Composition-B Manufacturing Line 9, Kingsport, Sullivan County, TN

470

Colour-Magnitude Diagrams from microlensing projects and galactic structure  

E-print Network

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

Y. K. Ng

1996-07-18

471

The Twofold Role of Diagrams in Euclid's Plane Geometry  

E-print Network

The Twofold Role of Diagrams in Euclid's Plane Geometry Marco Panza CNRS, IHPST (UMR 8590 of CNRS, University of Paris 1, and ENS Paris) August 12, 2011 Proposition I.1 of Euclid's Elements requires parlance1 . To achieve this, Euclid takes this segment to be AB (fig. 1), then describes two circles

Boyer, Edmond

472

On the Phase Diagram of Massive Yang-Mills  

E-print Network

The phases of a lattice gauge model for the massive Yang-Mills are investigated. The phase diagram supports the recent conjecture on the large energy behavior of nonlinearly realized massive gauge theories (i.e. mass a` la Stueckelberg, no Higgs mechanism), envisaging a Phase Transition (PT) to an asymptotically free massless Yang-Mills theory.

Ruggero Ferrari

2011-12-13

473

ORIGINAL PAPER Calculated Pourbaix Diagrams of Cubic Perovskites for Water  

E-print Network

also relied on the development of a better understanding of how the ultimate properties of a material in any type of application is stability. The precise requirements on the material stability of courseORIGINAL PAPER Calculated Pourbaix Diagrams of Cubic Perovskites for Water Splitting: Stability

Thygesen, Kristian

474

Software Tool Integrating Data Flow Diagrams and Petri Nets  

NASA Technical Reports Server (NTRS)

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

Thronesbery, Carroll; Tavana, Madjid

2010-01-01

475

Florence Nightingale's Visual Rhetoric in the Rose Diagrams  

Microsoft Academic Search

Florence Nightingale is usually pictured as an angelic nurse tending to British sol- diers in military hospitals during the Crimean War. Although Nightingale was indeed a tender of soldiers, she was also an administrator, advocate for the common soldier, and proponent of the use of statistics and information design. This article examines Nightingale's rose diagrams, which she designed following her

Lee Brasseur

2005-01-01

476

Diagram of the Apollo 15 & 16 Gamma-ray Detector  

NSDL National Science Digital Library

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

477

62. Historic propellant piping diagram of oxidant pit at Building ...  

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

62. Historic propellant piping diagram of oxidant pit at Building 202, January 6, 1956. NASA GRC drawing no. CF-101644. (On file at NASA Glenn Research Center). - Rocket Engine Testing Facility, GRC Building No. 202, NASA Glenn Research Center, Cleveland, Cuyahoga County, OH

478

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

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

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

479

Equations of State and Phase Diagrams of Ammonia  

ERIC Educational Resources Information Center

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

Glasser, Leslie

2009-01-01

480

Visualising Knowledge from Chat Debates in Argument Diagrams  

ERIC Educational Resources Information Center

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

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

2010-01-01

481

Graphic elicitation: using research diagrams as interview stimuli  

Microsoft Academic Search

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

NATHAN CRILLY; ALAN F BLACKWELL; P JOHN CLARKSON

2006-01-01

482

A THIRD LOOK AT WEIGHT DIAGRAMS Nikolai Vavilov  

E-print Network

at the Isaac Newton Institute for Mathematical Sciences. Typeset by A M S­T E X 1 #12; 2 nikolai vavilov of root subgroups and of the extended Weyl group, multilinear invariants, equations defining the orbit diagrams, crystal graphs, signs of structure constants, unipotent root elements, multilinear forms, orbit

Bielefeld, University of

483

Riparian Sediment Delivery Ratio: Stiff Diagrams and Artifical Neural Networks  

EPA Science Inventory

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

484

G404 Geobiology Abbreviations for tetrapod skull diagram  

E-print Network

#12;G404 Geobiology Fall 2011 Abbreviations for tetrapod skull diagram * = homolog present (additional "occipital" bones are present on back of skull)* EC ­ Ectopterygoid J ­ Jugal (also known ­ Prootic (houses the inner ear)* PS ­ Presphenoid (additional "sphenoid" bones are buried deep in skull

Polly, David

485

An empirical phase diagram approach to investigate conformational stability of  

E-print Network

fibroblast growth factor-1 (FGF-1) is an angiogenic protein which requires binding to a polyanion and conformational stability of 10 selected FGF-1 mutants were examined as a function of solution pH and temperature phase diagrams (EPDs). FGF-1 mutants were identified with stability profiles in the absence of heparin

Blaber, Michael

486

A martensite boundary on the WRC-1992 diagram  

SciTech Connect

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

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

1999-05-01

487

Guitar Scales in Music Notation and Tablature Diagrams.  

ERIC Educational Resources Information Center

This study guide was designed to help high school students learn the basic skills in classical guitar playing, technique, fingerboard knowledge, and musicianship. The introduction describes how to read the music notation that is presented in traditional music form and also in tablature diagrams showing finger positioning in the guitar neck.…

Hammer, Petra

488

Solid - liquid phase diagram for ethylene glycol + water  

Microsoft Academic Search

Freezing point data for the system (ethylene glycol + water) were measured independently by two different laboratories. Measurements were made over the entire composition range with particular emphasis on mixtures containing from 55 to 85 weight percent ethylene glycol. Using time vs. temperature cooling and warming curves, the solid-liquid phase diagram of ethylene glycol and water mixtures was determined. The

Dennis R. Cordray; Lisa R. Kaplan; Peter M. Woyciesjes; Theodore F. Kozak

1996-01-01

489

Cognitive Activities in Complex Science Text and Diagrams  

ERIC Educational Resources Information Center

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

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

2010-01-01

490

Using Stratified Attribute Tracking (SAT) Diagrams for Learning Analytics  

E-print Network

the process of SAT diagram generation would enable exploring deeper research questions on learning data-Disciplinary Program in Educational Technology Indian Institute of Technology Bombay rwitajit@iitb.ac.in Sridhar Iyer Department of Computer Science and Engineering Indian Institute of Technology Bombay sri@iitb.ac.in Abstract

Iyer, Sridhar

491

Application of Analytic Geometry to Ternary and Quaternary Diagrams.  

ERIC Educational Resources Information Center

Advantages of representing ternary and quaternary composition diagrams by means of rectangular coordinates were pointed out in a previous paper (EJ 288 693). A further advantage of that approach is that analytic geometry, based on rectangular coordinates, is directly applicable as demonstrated by the examples presented. (JN)

MacCarthy, Patrick

1986-01-01

492

Phase stabilities at a glance: Stability diagrams of nickel dipnictides  

SciTech Connect

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

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

2013-12-07

493

Efficiency of influence diagram models with continuous decision variables  

Microsoft Academic Search

A measure of efficiency for influence diagram models with continuous decision variables is presented in order to evaluate whether the additional computational complexity required by a more accurate model is justified. The efficiency measure is a multi-objective utility function that considers both the accuracy and complexity of the ID model. Accuracy is determined as the mean squared error between influence

Barry R. Cobb

2009-01-01

494

Using Tree Diagrams as an Assessment Tool in Statistics Education  

ERIC Educational Resources Information Center

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

Yin, Yue

2012-01-01

495

Strength diagrams of fibrous composites with unidirectional structure  

NASA Technical Reports Server (NTRS)

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

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

1982-01-01

496

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2011 CFR

... (c) The system diagram map shall be color-coded to show the 5 categories of lines...described in § 1152.10(b)(3); (4) Brown shall designate those lines described in...10(b)(4); and (5) Black or dark blue shall designate those lines...

2011-10-01

497

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2012 CFR

... (c) The system diagram map shall be color-coded to show the 5 categories of lines...described in § 1152.10(b)(3); (4) Brown shall designate those lines described in...10(b)(4); and (5) Black or dark blue shall designate those lines...

2012-10-01

498

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2013 CFR

... (c) The system diagram map shall be color-coded to show the 5 categories of lines...described in § 1152.10(b)(3); (4) Brown shall designate those lines described in...10(b)(4); and (5) Black or dark blue shall designate those lines...

2013-10-01

499

Analysing Collisions Using Minkowski Diagrams in Momentum Space  

ERIC Educational Resources Information Center

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

Bokor, Nandor

2011-01-01

500

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

Microsoft Academic Search

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

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

2008-01-01