Diagram, a Learning Environment for Initiation to Object-Oriented Modeling with UML Class Diagrams
ERIC Educational Resources Information Center
Py, Dominique; Auxepaules, Ludovic; Alonso, Mathilde
2013-01-01
This paper presents Diagram, a learning environment for object-oriented modelling (OOM) with UML class diagrams. Diagram an open environment, in which the teacher can add new exercises without constraints on the vocabulary or the size of the diagram. The interface includes methodological help, encourages self-correcting and self-monitoring, and…
Maletic, Jonathan I.
Andriyevska, Dragan, Simoes, Maletic VISSOFT05 Submission Evaluating UML Class Diagram Layout based}@cs.kent.edu Abstract The paper presents and assesses a layout scheme for UML class diagrams that takes into account and running of a user study is described. The results of the study supports the hypothesis that layout based
The Effect of Layout on the Comprehension of UML Class Diagrams: A Controlled Experiment
Maletic, Jonathan I.
The Effect of Layout on the Comprehension of UML Class Diagrams: A Controlled Experiment Bonita the effects of different layout strategies on the comprehension of UML class diagrams of two software systems, are used to assess the layouts. Each task consists of several questions aimed at measuring
ERIC Educational Resources Information Center
Baghaei, Nilufar; Mitrovic, Antonija; Irwin, Warwick
2007-01-01
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…
VISSOFT'07 Submission Kagdi, Maletic Onion Graphs for Focus+Context Views of UML Class Diagrams
Maletic, Jonathan I.
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
Program Synthesizes UML Sequence Diagrams
NASA Technical Reports Server (NTRS)
Barry, Matthew R.; Osborne, Richard N.
2006-01-01
A computer program called "Rational Sequence" generates Universal Modeling Language (UML) sequence diagrams of a target Java program running on a Java virtual machine (JVM). Rational Sequence thereby performs a reverse engineering function that aids in the design documentation of the target Java program. Whereas previously, the construction of sequence diagrams was a tedious manual process, Rational Sequence generates UML sequence diagrams automatically from the running Java code.
Automatic Construction of Timing Diagrams from UML/MARTE Models for Real-Time Embedded Software
Jee, Eunkyoung
Automatic Construction of Timing Diagrams from UML/MARTE Models for Real-Time Embedded Software sequence diagrams and state machine diagrams with MARTE annotations. The proposed approach enables de--Methodologies Keywords UML, MARTE, timing diagram, state machine diagram, se- quence diagram, real-time embedded software
1/22 UML-B State Machine Diagrams
Southampton, University of
;12/22 Example A factory machine can be switched on and off. When1/22 UML-B State Machine Diagrams May, 2010 Colin Snook University of Southampton #12;2/22 State Machines State machines provide a way to model
An Approach to Constructing Timing Diagrams from UML/MARTE Behavioral Models
An Approach to Constructing Timing Diagrams from UML/MARTE Behavioral Models for Guidance. UML/MARTE behavioral models can specify timing information in the multiple viewpoints. Among UML an approach to constructing timing diagrams with MARTE annotations from the state machine and sequence
Gilmore, Stephen
Automatic Extraction of PEPA Performance Models from UML Activity Diagrams Annotated with the MARTE performance evaluation provided by MARTE, the UML profile for model-driven development of Real Time and Embedded Systems. MARTE offers a rich semantics which is general enough to allow different quanti- tative
minimUML: A Minimalist Approach to UML Diagramming for Early Computer Science Education
ERIC Educational Resources Information Center
Turner, Scott A.; Perez-Quinones, Manuel A.; Edwards, Stephen H.
2005-01-01
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…
Jee, Eunkyoung
Toward Systematic Construction of Timing Diagrams from UML/MARTE Behavioral Models for Time. Given sequence diagrams and state machine diagrams with MARTE annotations, we propose a systematic way to construct timing diagrams with MARTE annotations. To get well-formed mod- els, we check timing constraints
Composition Inference for UML Class Diagrams Ana Milanova
Bystroff, Chris
on ownership and a novel approach for identifying compositions in Java software. Our approach is based-driven development. Categories and Subject Descriptors D.2.7 [Software Engineering]: Distribution, Maintenance-to analysis, reverse engineering, ownership 1. INTRODUCTION In modern software development design recovery
Full Satisfiability of UML Class Diagrams (Extended Abstract)
Calvanese, Diego
, and Angelica Ib´a~nez-Garc´ia KRDB Research Centre, Free University of Bozen-Bolzano, Italy {artale, Diego Calvanese, and Angelica Ib´a~nez-Garc´ia The proposed formalizations of UCDs indicate that one can
Modeling AN Application Domain Extension of Citygml in Uml
NASA Astrophysics Data System (ADS)
van den Brink, L.; Stoter, J.; Zlatanova, S.
2012-06-01
This paper presents key aspects of the development of a Dutch 3D standard IMGeo as a CityGML ADE. The new ADE is modeled using UML class diagrams. However the OGC CityGML specification does not provide clear rules on modeling an ADE in UML. This paper describes how the extension was built, which provides general insight how CityGML can be extended for a specific applications starting from the UML diagrams. Several alternatives for modeling ADEs in UML have been investigated and compared. The best suited for the 3D standard option is selected and applied. Open issues and challenges are discussed in the conclusions.
Commutation classes of double wiring diagrams
Dukes, Patrick
2010-01-01
We describe a new method for computing the graph of commutation classes of double wiring diagrams. Using these methods we compute the graph for five strings or less which allows us to confirm a positivity conjecture of Fomin and Zelevinsky when n is less than five .
NASA Technical Reports Server (NTRS)
Barry, Matthew R.; Osborne, Richard N.
2005-01-01
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.
Inclusion Diagrams for Classes of Deterministic Bottom-up
Reyle, Uwe
Inclusion Diagrams for Classes of Deterministic Bottom-up Tree-to-Tree-Series Transformations A Diagrams for Classes of Deterministic Bottom-up Tree-to-Tree-Series Transformations Andreas Maletti Faculty bottom-up weighted tree transducers (for short: deterministic bu-w-tt). Essentially, deterministic bu
Automatic Translation of UML Sequence Diagrams into PEPA Models Mirco Tribastone and Stephen Gilmore
Gilmore, Stephen
Time and Embedded systems (MARTE) provides a powerful, stan- dardised framework for the specification the profile for MARTE [10], which enriches the language with a num- ber of extensions to define non-functional properties. How- ever, MARTE serves only as a mechanism for annotating diagrams with timing information
NASA Technical Reports Server (NTRS)
Schneider, F.
1999-01-01
UML use cases conceptually identify function points or major requirements that a software system must satisfy. Sequence diagrams expand each use case to show in temporal sequence a more detailed notion of intended system behavior.
ERIC Educational Resources Information Center
Sien, Ven Yu
2011-01-01
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…
Precise Identification of Composition Relationships for UML Class Diagrams Ana Milanova
Bystroff, Chris
based on ownership and a novel approach for identifying compositions in Java software. Our approach uses in reverse engineering tools that support itera- tive model-driven development. 1. Introduction In modern software development design recovery through reverse engineering is performed often; in a typ- ical
Inter-association Constraints in UML2: Comparative Analysis, Usage Recommendations,
Balaban, Mira
Inter-association Constraints in UML2: Comparative Analysis, Usage Recommendations, and Modeling. To the best of our knowledge, this is the first all inclusive analysis of the inter-association constraints class diagram constructs and their interaction is still obscure. There are major problems with the inter-association
Automatic Synthesis of UML Designs from Requirements in an Iterative Process
NASA Technical Reports Server (NTRS)
Schumann, Johann; Whittle, Jon; Clancy, Daniel (Technical Monitor)
2001-01-01
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".
From UML to HDL: a Model Driven Architectural Approach to Hardware-Software Co-Design
Thornton, Mitchell
From UML to HDL: a Model Driven Architectural Approach to Hardware-Software Co-Design Frank P which takes a UML state diagram as input and generates HDL output suitable for use in Field Programmable-design. Specifically we outline details of MODCO, a tool for transforming UML state diagrams directly into HDL
Biomedical Terminology Mapper for UML projects
Thibault, Julien C.; Frey, Lewis
As the biomedical community collects and generates more and more data, the need to describe these datasets for exchange and interoperability becomes crucial. This paper presents a mapping algorithm that can help developers expose local implementations described with UML through standard terminologies. The input UML class or attribute name is first normalized and tokenized, then lookups in a UMLS-based dictionary are performed. For the evaluation of the algorithm 142 UML projects were extracted from caGrid and automatically mapped to National Cancer Institute (NCI) terminology concepts. Resulting mappings at the UML class and attribute levels were compared to the manually curated annotations provided in caGrid. Results are promising and show that this type of algorithm could speed-up the tedious process of mapping local implementations to standard biomedical terminologies. PMID:24303278
LOW TEMPERATURE PHASE DIAGRAM FOR A CLASS OF FINITE RANGE INTERACTIONS ON THE PENROSE LATTICE
LOW TEMPERATURE PHASE DIAGRAM FOR A CLASS OF FINITE RANGE INTERACTIONS ON THE PENROSE LATTICE FÂ odic structures like the Penrose tiling of the plane. To describe the quasiperiodic lattice, we use patterns it is necessary Å¡ to be large enough. Thus, for Penrose tilings of the plane Å¡ = 5, dim(E k ) = 2
Chiral $3?$-exchange NN-potentials: results for representation invariant classes of diagrams
N. Kaiser
1999-10-15
We calculate in (two-loop) chiral perturbation theory the local NN-potentials generated by certain classes of three-pion exchange diagrams. We stress that the chiral $3\\pi NN$-contact vertex depends on the particular choice of the interpolating pion-field and therefore one has to consider representation invariant classes of diagrams by supplementing graphs involving the chiral $4\\pi$-vertex. We find that the resulting isovector spin-spin and tensor NN-potentials are negligibly small for $r\\geq 0.8$ fm. One can conclude that the effects of uncorrelated chiral $3\\pi$-exchange in the NN-interaction are very small and therefore of no practical relevance.
Comprehensive Aspectual UML Approach to Support AspectJ
Magableh, Aws; Shukur, Zarina; Mohd. Ali, Noorazean
2014-01-01
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
Impact Analysis and Change Management of UML Models L. C. Briand, Y. Labiche, L. O'Sullivan
Carleton University
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
DIFFERENCING AND MERGING OF SOFTWARE DIAGRAMS State of the Art and Challenges
Westfechtel, Bernhard
DIFFERENCING AND MERGING OF SOFTWARE DIAGRAMS State of the Art and Challenges Sabrina F.foertsch@uni-bayreuth.de, bernhard.westfechtel@uni-bayreuth.de Keywords: Merging, Differencing, UML Diagram. Abstract: For long, fine and merging) for software diagrams with an emphasis on UML diagrams. 1 INTRODUCTION Software engineers create
Translation from UML to Markov Model: A Performance Modeling Framework
NASA Astrophysics Data System (ADS)
Khan, Razib Hayat; Heegaard, Poul E.
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.
Automatic Debugging Support for UML Designs
NASA Technical Reports Server (NTRS)
Schumann, Johann; Swanson, Keith (Technical Monitor)
2001-01-01
Design of large software systems requires rigorous application of software engineering methods covering all phases of the software process. Debugging during the early design phases is extremely important, because late bug-fixes are expensive. In this paper, we describe an approach which facilitates debugging of UML requirements and designs. The Unified Modeling Language (UML) is a set of notations for object-orient design of a software system. We have developed an algorithm which translates requirement specifications in the form of annotated sequence diagrams into structured statecharts. This algorithm detects conflicts between sequence diagrams and inconsistencies in the domain knowledge. After synthesizing statecharts from sequence diagrams, these statecharts usually are subject to manual modification and refinement. By using the "backward" direction of our synthesis algorithm. we are able to map modifications made to the statechart back into the requirements (sequence diagrams) and check for conflicts there. Fed back to the user conflicts detected by our algorithm are the basis for deductive-based debugging of requirements and domain theory in very early development stages. Our approach allows to generate explanations oil why there is a conflict and which parts of the specifications are affected.
BGen: A UML Behavior Network Generator Tool
NASA Technical Reports Server (NTRS)
Huntsberger, Terry; Reder, Leonard J.; Balian, Harry
2010-01-01
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.
UML for ABM http://jasss.soc.surrey.ac.uk/15/1/9.html[6/25/2012 8:51:27 PM
Tesfatsion, Leigh
visualization of software development. UML and its 13 diagrams has many universally accepted virtues. Most importantly, UML provides a level of abstraction higher than that offered by OO programming languages (Java, C development). The most important features of these diagrams are discussed, and explanations based
Using Diagrams versus Text for Spaced Restudy: Effects on Learning in 10th Grade Biology Classes
ERIC Educational Resources Information Center
Bergey, Bradley W.; Cromley, Jennifer G.; Kirchgessner, Mandy L.; Newcombe, Nora S.
2015-01-01
Background and Aim: Spaced restudy has been typically tested with written learning materials, but restudy with visual representations in actual classrooms is under-researched. We compared the effects of two spaced restudy interventions: A Diagram-Based Restudy (DBR) warm-up condition and a business-as-usual Text-Based Restudy (TBR) warm-up…
Implementation of UML Schema to RDBM
NASA Astrophysics Data System (ADS)
Nagni, M.; Ventouras, S.; Parton, G.
2012-04-01
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.
A UML Profile for State Analysis
NASA Technical Reports Server (NTRS)
Murray, Alex; Rasmussen, Robert
2010-01-01
State Analysis is a systems engineering methodology for the specification and design of control systems, developed at the Jet Propulsion Laboratory. The methodology emphasizes an analysis of the system under control in terms of States and their properties and behaviors and their effects on each other, a clear separation of the control system from the controlled system, cognizance in the control system of the controlled system's State, goal-based control built on constraining the controlled system's States, and disciplined techniques for State discovery and characterization. State Analysis (SA) introduces two key diagram types: State Effects and Goal Network diagrams. The team at JPL developed a tool for performing State Analysis. The tool includes a drawing capability, backed by a database that supports the diagram types and the organization of the elements of the SA models. But the tool does not support the usual activities of software engineering and design - a disadvantage, since systems to which State Analysis can be applied tend to be very software-intensive. This motivated the work described in this paper: the development of a preliminary Unified Modeling Language (UML) profile for State Analysis. Having this profile would enable systems engineers to specify a system using the methods and graphical language of State Analysis, which is easily linked with a larger system model in SysML (Systems Modeling Language), while also giving software engineers engaged in implementing the specified control system immediate access to and use of the SA model, in the same language, UML, used for other software design. That is, a State Analysis profile would serve as a shared modeling bridge between system and software models for the behavior aspects of the system. This paper begins with an overview of State Analysis and its underpinnings, followed by an overview of the mapping of SA constructs to the UML metamodel. It then delves into the details of these mappings and the constraints associated with them. Finally, we give an example of the use of the profile for expressing an example SA model.
Metaphor and Numerical Diagrams in the Arithmetical Activity of a Fourth-Grade Class
ERIC Educational Resources Information Center
Saenz-Ludlow, Adalira
2004-01-01
Fourth-grade students who participated in a yearlong, whole-class teaching experiment not only reconceptualized natural numbers but also generated flexible solution strategies to perform numerical computations mentally and in writing. Students' reconceptualization of number was mediated by their perceived resemblance between the physical action of…
UML Profiles for Design Decisions and Non-Functional Requirements
Zhu, Liming; Gorton, Ian
2007-06-30
A software architecture is composed of a collection of design decisions. Each design decision helps or hinders certain Non-Functional Requirements (NFR). Current software architecture views focus on expressing components and connectors in the system. Design decisions and their relationships with non-functional requirements are often captured in separate design documentation, not explicitly expressed in any views. This disassociation makes architecture comprehension and architecture evolution harder. In this paper, we propose a UML profile for modeling design decisions and an associated UML profile for modeling non-functional requirements in a generic way. The two UML profiles treat design decisions and nonfunctional requirements as first-class elements. Modeled design decisions always refer to existing architectural elements and thus maintain traceability between the two. We provide a mechanism for checking consistency over this traceability. An exemplar is given as
Exploration games for UML software design
Tenzer, Jennifer
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, ...
Exploiting UMLS Semantics for Checking Semantic Consistency among UMLS concepts
Erdogan, Halit; Erdem, Esra; Bodenreider, Olivier
2015-01-01
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
Modeling Value Chain Analysis of Distance Education using UML
NASA Astrophysics Data System (ADS)
Acharya, Anal; Mukherjee, Soumen
2010-10-01
Distance education continues to grow as a methodology for the delivery of course content in higher education in India as well as abroad. To manage this growing demand and to provide certain flexibility, there must be certain strategic planning about the use of ICT tools. Value chain analysis is a framework for breaking down the sequence of business functions into a set of activities through which utility could be added to service. Thus it can help to determine the competitive advantage that is enjoyed by an institute. To implement these business functions certain visual representation is required. UML allows for this representation by using a set of structural and behavioral diagrams. In this paper, the first section defines a framework for value chain analysis and highlights its advantages. The second section gives a brief overview of related work in this field. The third section gives a brief discussion on distance education. The fourth section very briefly introduces UML. The fifth section models value chain of distance education using UML. Finally we discuss the limitations and the problems posed in this domain.
UML and Concurrency Perdita Stevens
Stevens, Perdita
premature decisions about ordering of events. 6 #12;Basic "flow chart" activity diagram Calculate total cost diagrams as revised in their proposal. 16 #12;U2P Submitters: Alcatel, Computer Associates, Enea Business
Aspect-Oriented Subprogram Synthesizes UML Sequence Diagrams
NASA Technical Reports Server (NTRS)
Barry, Matthew R.; Osborne, Richard N.
2006-01-01
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
BUSINESS PROCESS MODELING WITH UML Nuno Castela
da Silva, Alberto Rodrigues
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
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.
Sculpting the UMLS Refined Semantic Network
Morrey, C. Paul; Perl, Yehoshua; Elhanan, Gai; Chen, Ling; Chen, Yan; Geller, James
2014-01-01
Background The Refined Semantic Network (RSN) for the UMLS was previously introduced to complement the UMLS Semantic Network (SN). The RSN partitions the UMLS Metathesaurus (META) into disjoint groups of concepts. Each such group is semantically uniform. However, the RSN was initially an order of magnitude larger than the SN, which is undesirable since to be useful, a semantic network should be compact. Most semantic types in the RSN represent combinations of semantic types in the UMLS SN. Such a “combination semantic type” is called Intersection Semantic Type (IST). Many ISTs are assigned to very few concepts. Moreover, when reviewing those concepts, many semantic type assignment inconsistencies were found. After correcting those inconsistencies many ISTs, among them some that contradicted UMLS rules, disappeared, which made the RSN smaller. Objective The authors performed a longitudinal study with the goal of reducing the size of the RSN to become compact. This goal was achieved by correcting inconsistencies and errors in the IST assignments in the UMLS, which additionally helped identify and correct ambiguities, inconsistencies, and errors in source terminologies widely used in the realm of public health. Methods In this paper, we discuss the process and steps employed in this longitudinal study and the intermediate results for different stages. The sculpting process includes removing redundant semantic type assignments, expanding semantic type assignments, and removing illegitimate ISTs by auditing ISTs of small extents. However, the emphasis of this paper is not on the auditing methodologies employed during the process, since they were introduced in earlier publications, but on the strategy of employing them in order to transform the RSN into a compact network. For this paper we also performed a comprehensive audit of 168 “small ISTs” in the 2013AA version of the UMLS to finalize the longitudinal study. Results Over the years it was found that the editors of the UMLS introduced some new inconsistencies that resulted in the reintroduction of unwarranted ISTs that had already been eliminated as a result of their previous corrections. Because of that, the transformation of the RSN into a compact network covering all necessary categories for the UMLS was slowed down. The corrections suggested by an audit of the 2013AA version of the UMLS achieve a compact RSN of equal magnitude as the UMLS SN. The number of ISTs has been reduced to 336. We also demonstrate how auditing the semantic type assignments of UMLS concepts can expose other modeling errors in the UMLS source terminologies, e.g., SNOMED CT, LOINC, and RxNORM that are important for health informatics. Such errors would otherwise stay hidden. Conclusions It is hoped that the UMLS curators will implement all required corrections and use the RSN along with the SN when maintaining and extending the UMLS. When used correctly, the RSN will support the prevention of the accidental introduction of inconsistent semantic type assignments into the UMLS. Furthermore, this way the RSN will support the exposure of other hidden errors and inconsistencies in health informatics terminologies, which are sources of the UMLS. Notably, the development of the RSN materializes the deeper, more refined Semantic Network for the UMLS that its designers envisioned originally but had not implemented. PMID:25422719
Description of ITRF construction using UML notation
NASA Astrophysics Data System (ADS)
Pa?nicka, M.; Szafranek, K.; Zwirowicz-Rutkowska, A.
2012-04-01
International Terrestrial Reference Frame (ITRF), as a practical realization of the International Terrestrial Reference System (ITRS), is based on long-term observations of four techniques: Global Navigation Satellite System (GNSS), Satellite Laser Ranging (SLR), DORIS. As a consequence contribution to ITRF of each of the mentioned techniques is different (e.g. origin of ITRF2008 was determined basing on SLR, scale using SLR and VLBI, and orientation was the result of all four techniques). ITRF is updated regularly with the most recent versions being ITRF97, ITRF2000, ITRF2005, ITRF2008. ITRF2008 is based on reprocessed solutions (time series of station positions and Earth Orientation Parameters) of all four techniques. The paper presents procedure of determining ITRF2008 using UML (Unified Modeling Language) - one of the graphical notations commonly used for information modeling. Concepts are represented as classes with their names, attributes, and different kinds of links between them. The main purpose of this paper is a comprehensive description of relationships between basic terms related to ITRF.
The double-mode nature of the HADS star GSC 00144-03031 and the Petersen diagram of the class
E. Poretti; J. C. Suarez; P. G. Niarchos; K. D. Gazeas; V. N. Manimanis; P. Van Cauteren; P. Lampens; P. Wils; R. Alonso; P. J. Amado; J. A. Belmonte; N. D. Butterworth; M. Martignoni; S. Martin-Ruiz; P. Moskalik; C. W. Robertson
2005-06-13
The double--mode pulsation of GSC 00144-03031 has been detected when searching for COROT targets. A very large dataset composed of 4722 photometric measurements was collected at six observatories in Europe and America. There is no hint of the excitation of additional modes (down to 0.6 mmag) and therefore GSC 00144-03031 seems to be a pure double--mode pulsator, with a very short fundamental radial mode (P=84 min). From Stromgren photometry and evolutionary tracks it appears to be a Pop. I star with M=1.75 solar masses, located in the middle of the instability strip, close to the Zero--Age Main Sequence. We also discovered other new double--mode pulsators in the databases of large--scale projects: OGLE BW2_V142, OGLE BW1_V207, ASAS3 094303-1707.3, ASAS3 000116-6037.0, NSVS 3234596 and NSVS 3324715. An observational Petersen diagram is presented and explained by means of new models. A common sequence connecting Pop. I stars from the shortest to the longest periods is proposed and the spreads in the period ratios are ascribed to different metallicities (at the shortest periods) and to different masses (at the longest ones). The paper is based on data collected at S. Pedro Martir and Sierra Nevada Observatories and on the contributions from several amateur astronomers.
Lunds Universitet EDAF25 Datavetenskap Eclipse-UML
Lunds Universitet EDAF25 Datavetenskap Eclipse-UML 1 Refaktorisering och UML med Eclipse 1. Introduktion Eclipse är en utvecklingsmiljö för allehanda uppgifter. Den med UML. Eclipse är utformat som ett ramverk så att man enkelt kan lägga till ny funktionalitet med
Definition von UML mit UML und OCL: Uberblick zum Stand der Technik
Gogolla, Martin - Fachbereich 3
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
UMLS knowledge for biomedical language processing.
McCray, A T; Aronson, A R; Browne, A C; Rindflesch, T C; Razi, A; Srinivasan, S
1993-01-01
This paper describes efforts to provide access to the free text in biomedical databases. The focus of the effort is the development of SPECIALIST, an experimental natural language processing system for the biomedical domain. The system includes a broad coverage parser supported by a large lexicon, modules that provide access to the extensive Unified Medical Language System (UMLS) Knowledge Sources, and a retrieval module that permits experiments in information retrieval. The UMLS Metathesaurus and Semantic Network provide a rich source of biomedical concepts and their interrelationships. Investigations have been conducted to determine the type of information required to effect a map between the language of queries and the language of relevant documents. Mappings are never straightforward and often involve multiple inferences. PMID:8472004
A UML-based meta-framework for system design in public health informatics.
Orlova, Anna O.; Lehmann, Harold
2002-01-01
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
Modeling SPIRIT IP-XACT with UML MARTE Charles Andre
Mallet, FrÃ©dÃ©ric
Modeling SPIRIT IP-XACT with UML MARTE Charles AndrÂ´e , FrÂ´edÂ´eric Mallet , Aamir Mehmood Khan representation issues. The equally recent MARTE UML profile focuses explicitly on the rich expression of time- tions as MARTE models. This leaves open the possibility to extend the formalism with timing aspects
Validierung von UML-Modellen und OCL-Bedingungen
Gogolla, Martin - Fachbereich 3
Validierung von UML-Modellen und OCL-Bedingungen Mark Richters and Martin Gogolla UniversitÃ¤t ein allgemein akzeptierter Standard fÃ¼r die Modellierung von Software- Systemen und wird als solcher von einer groÃ¿en Anzahl von CASE-Tools unterstÃ¼tzt. Oft weisen UML-Werkzeuge nur wenig UnterstÃ¼tzung
Interpreting natural language queries using the UMLS.
Johnson, S. B.; Aguirre, A.; Peng, P.; Cimino, J.
1993-01-01
This paper describes AQUA (A QUery Analyzer), the natural language front end of a prototype information retrieval system. AQUA translates a user's natural language query into a representation in the Conceptual Graph formalism. The graph is then used by subsequent components to search various resources such as databases of the medical literature. The focus of the parsing method is on semantics rather than syntax, with semantic restrictions being provided by the UMLS Semantic Net. The intent of the approach is to provide a method that can be emulated easily in applications that require simple natural language interfaces. PMID:8130481
Concepts and Synonymy in the UMLS Metathesaurus
Merrill, Gary H.
2009-01-01
This paper advances a detailed exploration of the complex relationships among terms, concepts, and synonymy in the UMLS (Uni?ed Medical Language System) Metathesaurus, and proposes the study and understanding of the Metathesaurus from a model-theoretic perspective. Initial sections provide the background and motivation for such an approach, and a careful informal treatment of these notions is offered as a context and basis for the formal analysis. What emerges from this is a set of puzzles and confusions in the Metathesaurus and its literature pertaining to synonymy and its relation to terms and concepts. A model theory for a segment of the Metathesaurus is then constructed, and its adequacy relative to the informal treatment is demonstrated. Finally, it is shown how this approach clari?es and addresses the puzzles educed from the informal discussion, and how the model-theoretic perspective may be employed to evaluate some fundamental criticisms of the Metathesaurus. For users of the UMLS, two signi?cant results of this analysis are a rigorous clari?cation of the different senses of synonymy that appear in treatments of the Metathesaurus and an illustration of the dangers in computing inferences involving ambiguous terms. PMID:19838995
Representing Thoughts, Words, and Things in the UMLS
Campbell, Keith E.; Oliver, Diane E.; Spackman, Kent A.; Shortliffe, Edward H.
1998-01-01
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
Modelling recursive calls with UML state Jennifer Tenzer ? and Perdita Stevens ??
Stevens, Perdita
of the state diagram to show both the event which causes the transition (typically, the fact that the object.0 submitters and recent theoretical work [1, 6], we propose a solution to this problem using state diagrams-detailed) possible states of objects of the class. Next, s/he considers which events may happen to an object
Evaluation of a UMLS Auditing Process of Semantic Type Assignments.
Gu, Huanying Helen; Hripcsak, George; Chen, Yan; Morrey, C Paul; Elhanan, Gai; Cimino, James; Geller, James; Perl, Yehoshua
2007-01-01
The UMLS is a terminological system that integrates many source terminologies. Each concept in the UMLS is assigned one or more semantic types from the Semantic Network, an upper level ontology for biomedicine. Due to the complexity of the UMLS, errors exist in the semantic type assignments. Finding assignment errors may unearth modeling errors. Even with sophisticated tools, discovering assignment errors requires manual review. In this paper we describe the evaluation of an auditing project of UMLS semantic type assignments. We studied the performance of the auditors who reviewed potential errors. We found that four auditors, interacting according to a multi-step protocol, identified a high rate of errors (one or more errors in 81% of concepts studied) and that results were sufficiently reliable (0.67 to 0.70) for the two most common types of errors. However, reliability was low for each individual auditor, suggesting that review of potential errors is resource-intensive. PMID:18693845
Semi-Supervised Learning to Identify UMLS Semantic Relations.
Luo, Yuan; Uzuner, Ozlem
2014-01-01
The UMLS Semantic Network is constructed by experts and requires periodic expert review to update. We propose and implement a semi-supervised approach for automatically identifying UMLS semantic relations from narrative text in PubMed. Our method analyzes biomedical narrative text to collect semantic entity pairs, and extracts multiple semantic, syntactic and orthographic features for the collected pairs. We experiment with seeded k-means clustering with various distance metrics. We create and annotate a ground truth corpus according to the top two levels of the UMLS semantic relation hierarchy. We evaluate our system on this corpus and characterize the learning curves of different clustering configuration. Using KL divergence consistently performs the best on the held-out test data. With full seeding, we obtain macro-averaged F-measures above 70% for clustering the top level UMLS relations (2-way), and above 50% for clustering the second level relations (7-way). PMID:25954580
Unambiguous UML Composite Structures: The OMEGA2 Experience
NASA Astrophysics Data System (ADS)
Ober, Iulian; Dragomir, Iulia
Starting from version 2.0, UML introduced hierarchical composite structures, which are a very expressive way of defining complex software architectures, but which have a very loosely defined semantics in the standard. In this paper we propose a set of consistency rules that ensure UML composite structures are unambiguous and can be given a precise semantics. Our primary application of the static consistency rules defined in this paper is within the OMEGA UML profile [6], but these rules are general and applicable to other hierarchical component models based on the same concepts, such as MARTE GCM or SysML. The rule set has been formalized in OCL and is currently used in the OMEGA UML compiler.
An Infrastructure for UML-Based Code Generation Tools
NASA Astrophysics Data System (ADS)
Wehrmeister, Marco A.; Freitas, Edison P.; Pereira, Carlos E.
The use of Model-Driven Engineering (MDE) techniques in the domain of distributed embedded real-time systems are gain importance in order to cope with the increasing design complexity of such systems. This paper discusses an infrastructure created to build GenERTiCA, a flexible tool that supports a MDE approach, which uses aspect-oriented concepts to handle non-functional requirements from embedded and real-time systems domain. GenERTiCA generates source code from UML models, and also performs weaving of aspects, which have been specified within the UML model. Additionally, this paper discusses the Distributed Embedded Real-Time Compact Specification (DERCS), a PIM created to support UML-based code generation tools. Some heuristics to transform UML models into DERCS, which have been implemented in GenERTiCA, are also discussed.
Sophia: A Expedient UMLS Concept Extraction Annotator
Divita, Guy; Zeng, Qing T; Gundlapalli, Adi V.; Duvall, Scott; Nebeker, Jonathan; Samore, Matthew H.
2014-01-01
An opportunity exists for meaningful concept extraction and indexing from large corpora of clinical notes in the Veterans Affairs (VA) electronic medical record. Currently available tools such as MetaMap, cTAKES and HITex do not scale up to address this big data need. Sophia, a rapid UMLS concept extraction annotator was developed to fulfill a mandate and address extraction where high throughput is needed while preserving performance. We report on the development, testing and benchmarking of Sophia against MetaMap and cTAKEs. Sophia demonstrated improved performance on recall as compared to cTAKES and MetaMap (0.71 vs 0.66 and 0.38). The overall f-score was similar to cTAKES and an improvement over MetaMap (0.53 vs 0.57 and 0.43). With regard to speed of processing records, we noted Sophia to be several fold faster than cTAKES and the scaled-out MetaMap service. Sophia offers a viable alternative for high-throughput information extraction tasks. PMID:25954351
Resummation of Cactus Diagrams in Lattice QCD
H. Panagopoulos; E. Vicari
1998-06-08
We show how to perform a resummation, to all orders in perturbation theory, of a certain class of gauge invariant diagrams in Lattice QCD. These diagrams are often largely responsible for lattice artifacts. Our resummation leads to an improved perturbative expansion. Applied to a number of cases of interest, this expansion yields results remarkably close to corresponding nonperturbative estimates.
Specification and Utilization of Core Assets: Feature-Oriented vs. UML-based Methods
Reinhartz-Berger, Iris
and UML-based ADOM. We found similar performance in modifying core assets in the two methods and some-based DOmain Modeling (ADOM), which is defined through a UML 2 profile [10]. We chose these two particular
Performance Analysis of Security Aspects by Weaving Scenarios Extracted from UML Models
Bieman, James M.
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
Why Unified is not Universal UML Shortcomings for Coping with Round-trip Engineering
Ducasse, Stéphane
Why Unified is not Universal UML Shortcomings for Coping with Round-trip Engineering Serge Demeyer efforts, yet warn against the tendency to use UML as the panacea for all exchange standards. In particular round-trip engineering tools, because one is forced to rely on UML's built-in extension mechanisms
Vehicle System Management Modeling in UML for Ares I
NASA Technical Reports Server (NTRS)
Pearson, Newton W.; Biehn, Bradley A.; Curry, Tristan D.; Martinez, Mario R.
2011-01-01
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.
Exploiting Practical Limitations of UML Diagrams for Model Validation and Execution
Steimann, Friedrich
as follows. After presenting the rationale of our work, we discuss what we have observed as the limitations of graphical modelling. Based on these observations we define the core of our executable language as the target
A Note on Semantics (with an Emphasis on UML)
Rumpe, Bernhard
A Note on Semantics (with an Emphasis on UML) Bernhard Rumpe Institut für Informatik Technische in reality." David Parnas, 1998 Abstract This note clarifies the concept of syntax and semantics and their relationships. Today, a lot of confusion arises from the fact that the word "semantics" is used in different
Towards Personalized Medical Document Classification by Leveraging UMLS Semantic Network
Petrakis, Euripides G.M.
) they are using and use medical terminology for their searches. A med- ical information system must be capableTowards Personalized Medical Document Classification by Leveraging UMLS Semantic Network Kleanthi@isc.tuc.gr, {angelos, euripides}@intelligence.tuc.gr, skoutsos@gmail.com Abstract. The overwhelmed amount of medical
Towards Personalized Medical Document Classification by Leveraging UMLS Semantic
Petrakis, Euripides G.M.
professionals. There is a gap between consumer and medical experts terminology. i.e. stomach ache vs. gastralgiaTowards Personalized Medical Document Classification by Leveraging UMLS Semantic Network Kleanthi, London, 2013 Lakiotaki et.al (TUC) Personalized Medical Document Classification klakiotaki@isc.tuc.gr 1
Visualization of Learning Scenarios with UML4LD
ERIC Educational Resources Information Center
Laforcade, Pierre
2007-01-01
Present Educational Modelling Languages are used to formally specify abstract learning scenarios in a machine-interpretable format. Current tooling does not provide teachers/designers with some graphical facilities to help them in reusing existent scenarios. They need human-readable representations. This paper discusses the UML4LD experimental…
An Approach to Software Architecture Description Using UML
Christensen, Henrik Bærbak
..*organized by Concern has 1..* is important to 1..* conforms to selects Figure 1: Ontology of architecturalAn Approach to Software Architecture Description Using UML Henrik Bærbak Christensen, Aino Corry, and Klaus Marius Hansen Department of Computer Science, University of Aarhus Aabogade 34, 8200 °Arhus N
Generating Tests from UML Specifications Jeff Offutt and Aynur Abdurazik ?
Offutt, Jeff
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
Evaluation Methodology for UML and GML Application Schemas Quality
NASA Astrophysics Data System (ADS)
Chojka, Agnieszka
2014-05-01
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.
Students' Different Understandings of Class Diagrams
ERIC Educational Resources Information Center
Boustedt, Jonas
2012-01-01
The software industry needs well-trained software designers and one important aspect of software design is the ability to model software designs visually and understand what visual models represent. However, previous research indicates that software design is a difficult task to many students. This article reports empirical findings from a…
Gray categories with duals and their diagrams
John W. Barrett; Catherine Meusburger; Gregor Schaumann
2013-05-04
The geometric and algebraic properties of Gray categories with duals are investigated by means of a diagrammatic calculus. The diagrams are three-dimensional stratifications of a cube, with regions, surfaces, lines and vertices labelled by Gray category data. These can be viewed as a generalisation of ribbon diagrams. The Gray categories present two types of duals, which are extended to Gray category functors with natural isomorphisms, and correspond directly to symmetries of the diagrams. It is shown that these functors can be strictified so that the symmetries of a cube are realised exactly. A new condition on Gray categories with duals called the spatial condition is defined. We exhibit a class of diagrams for which the evaluation for spatial Gray categories is invariant under homeomorphisms. This relation between the geometry of the diagrams and structures in the Gray categories proves useful in computations and has potential applications in topological quantum field theory.
General Methodology for developing UML models from UI
Reddy, Ch Ram Mohan; Srinivasa, K G; Kumar, T V Suresh; Kanth, K Rajani
2012-01-01
In recent past every discipline and every industry have their own methods of developing products. It may be software development, mechanics, construction, psychology and so on. These demarcations work fine as long as the requirements are within one discipline. However, if the project extends over several disciplines, interfaces have to be created and coordinated between the methods of these disciplines. Performance is an important quality aspect of Web Services because of their distributed nature. Predicting the performance of web services during early stages of software development is significant. In Industry, Prototype of these applications is developed during analysis phase of Software Development Life Cycle (SDLC). However, Performance models are generated from UML models. Methodologies for predicting the performance from UML models is available. Hence, In this paper, a methodology for developing Use Case model and Activity model from User Interface is presented. The methodology is illustrated with a case...
Extending a natural language parser with UMLS knowledge.
McCray, A. T.
1991-01-01
Over the past several years our research efforts have been directed toward the identification of natural language processing methods and techniques for improving access to biomedical information stored in computerized form. To provide a testing ground for some of these ideas we have undertaken the development of SPECIALIST, a prototype system for parsing and accessing biomedical text. The system includes linguistic and biomedical knowledge. Linguistic knowledge involves rules and facts about the grammar of the language. Biomedical knowledge involves rules and facts about the domain of biomedicine. The UMLS knowledge sources, Meta-1 and the Semantic Network, as well as the UMLS test collection, have recently contributed to the development of the SPECIALIST system. PMID:1807586
Latent Semantic Indexing of medical diagnoses using UMLS semantic structures.
Chute, C. G.; Yang, Y.; Evans, D. A.
1991-01-01
The relational files within the UMLS Metathesaurus contain rich semantic associations to main concepts. We invoked the technique of Latent Semantic Indexing to generate information matrices based on these relationships and created "semantic vectors" using singular value decomposition. Evaluations were made on the complete set and subsets of Metathesaurus main concepts with the semantic type "Disease or Syndrome." Real number matrices were created with main concepts, lexical variants, synonyms, and associated expressions. Ancestors, children, siblings, and related terms were added to alternative matrices, preserving the hierarchical direction of the relation as the imaginary component of a complex number. Preliminary evaluation suggests that this technique is robust. A major advantage is the exploitation of semantic features which derive from a statistical decomposition of UMLS structures, possibly reducing dependence on the tedious construction of semantic frames by humans. PMID:1807584
Identifying UMLS concepts from ECG Impressions using KnowledgeMap
Denny, Joshua C.; Spickard, Anderson; Miller, Randolph A; Schildcrout, Jonathan; Darbar, Dawood; Rosenbloom, S. Trent; Peterson, Josh F.
2005-01-01
Electrocardiogram (ECG) impressions represent a wealth of medical information for potential decision support and drug-effect discovery. Much of this information is inaccessible to automated methods in the free-text portion of the ECG report. We studied the application of the KnowledgeMap concept identifier (KMCI) to map Unified Medical Language System (UMLS) concepts from ECG impressions. ECGs were processed by KMCI and the results scored for accuracy by multiple raters. Reviewers also recorded unidentified concepts through the scoring interface. Overall, KMCI correctly identified 1059 out of 1171 concepts for a recall of 0.90. Precision, indicating the proportion of ECG concepts correctly identified, was 0.94. KMCI was particularly effective at identifying ECG rhythms (330/333), perfusion changes (65/66), and noncardiac medical concepts (11/11). In conclusion, KMCI is an effective method for mapping ECG impressions to UMLS concepts. PMID:16779029
Assessing thesaurus-based query expansion using the UMLS Metathesaurus.
Hersh, W.; Price, S.; Donohoe, L.
2000-01-01
OBJECTIVES: Assess query expansion using thesaurus relationships and definitions in the UMLS Metathesaurus for improving searching performance. METHODS: The queries from a MEDLINE test collection (OHSUMED) were expanded using synonym, hierarchical, and related term information as well as term definitions from the UMLS Metathesaurus. Documents were retrieved from a word-statistical retrieval system and assessed for recall and precision based on relevance judgments from the test collection. RESULTS: All types of query expansion degraded aggregate retrieval performance as measured by recall and precision, although 38.6% of the queries with synonym expansion and up to 29.7% of the queries with hierarchical expansion showed improvement. CONCLUSIONS: Thesaurus-based query expansion causes a decline in retrieval performance generally but improves it in specific instances. Further research must focus on identifying instances where performance improves and how it can be exploited by real users. PMID:11079902
Intervocabulary Mapping Within the UMLS: The Role of Lexical Matching*
Sherertz, D.D.; Tuttle, M.S.; Blois, M.S.; Erlbaum, M.S.
1988-01-01
Within the NLM's UMLS Project, one challenge is mapping concepts from one information resource to another. While a complete solution to this problem requires construction of a comprehensive biomedical thesaurus, the present research provides evidence that considerable progress can be made with a straightforward lexical approach. Furthermore, such a lexical approach is the only practical way to begin construction of, and maintain, any such thesaurus. Related research has demonstrated the regularity of word usage within the context of biomedicine. This regularity suggests that mapping between biomedical information resources that have a constrained vocabulary can use lexical matching techniques with considerable success. A method has been developed to map ‘phrases’ from candidate sources to MeSH. In one experiment, this method attempts to map 834 disease names from the disease descriptions composed at UCSF for the UMLS. In a second experiment, the same method attempts to map disease attributes from these diseases.
Auditing the multiply-related concepts within the UMLS
Mougin, Fleur; Grabar, Natalia
2014-01-01
Objective This work focuses on multiply-related Unified Medical Language System (UMLS) concepts, that is, concepts associated through multiple relations. The relations involved in such situations are audited to determine whether they are provided by source vocabularies or result from the integration of these vocabularies within the UMLS. Methods We study the compatibility of the multiple relations which associate the concepts under investigation and try to explain the reason why they co-occur. Towards this end, we analyze the relations both at the concept and term levels. In addition, we randomly select 288 concepts associated through contradictory relations and manually analyze them. Results At the UMLS scale, only 0.7% of combinations of relations are contradictory, while homogeneous combinations are observed in one-third of situations. At the scale of source vocabularies, one-third do not contain more than one relation between the concepts under investigation. Among the remaining source vocabularies, seven of them mainly present multiple non-homogeneous relations between terms. Analysis at the term level also shows that only in a quarter of cases are the source vocabularies responsible for the presence of multiply-related concepts in the UMLS. These results are available at: http://www.isped.u-bordeaux2.fr/ArticleJAMIA/results_multiply_related_concepts.aspx. Discussion Manual analysis was useful to explain the conceptualization difference in relations between terms across source vocabularies. The exploitation of source relations was helpful for understanding why some source vocabularies describe multiple relations between a given pair of terms. PMID:24464853
Auto-Coding UML Statecharts for Flight Software
NASA Technical Reports Server (NTRS)
Benowitz, Edward G; Clark, Ken; Watney, Garth J.
2006-01-01
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).
ERIC Educational Resources Information Center
Henderson, Garry
1999-01-01
Argues that diagram interpretation is largely text-dependent and is also dependent upon the use of particular diagram-processing skills which may be very difficult to develop. Discusses some interpretation difficulties and advances strategies to help teachers make more effective use of diagrams. (Contains 20 references.) (Author/WRM)
SSBRP Communication & Data System Development using the Unified Modeling Language (UML)
NASA Technical Reports Server (NTRS)
Windrem, May; Picinich, Lou; Givens, John J. (Technical Monitor)
1998-01-01
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.
Kepler's Laws of Planetary Motion Charles Byrne (Charles Byrne@uml.edu)
Byrne, Charles
Kepler's Laws of Planetary Motion Charles Byrne (Charles Byrne@uml.edu) Department of Mathematical as a pdf file at http://faculty.uml.edu/cbyrne/cbyrne.html) December 6, 2014 Abstract Kepler worked from is quite unlike a circle, at least relatively speaking. This forced Kepler to consider other possibilities
Stølen, Ketil
a systematic method for designing test cases by making use of risk analysis [1], [2]. As part of the method, weSchematic Generation of English-prose Semantics for a Risk Analysis Language Based on UML risk-driven testing, we have developed CORAL, a language for risk analysis based on UML interac- tions
Mining Cross-Terminology Links in the UMLS Chintan O. Patel, MS; James J. Cimino, MD
Cimino, James J.
=Related/Synonymous, SIB=Sibling, CHD=Child, CPT=Current Procedural Terminology, MeSH=Medical Subject Headings)1 In contextMining Cross-Terminology Links in the UMLS Chintan O. Patel, MS; James J. Cimino, MD Department over transitive relationship paths in the Unified Medical Language System (UMLS). The goal
CoLeMo: A Collaborative Learning Environment for UML Modelling
ERIC Educational Resources Information Center
Chen, Weiqin; Pedersen, Roger Heggernes; Pettersen, Oystein
2006-01-01
This paper presents the design, implementation, and evaluation of a distributed collaborative UML modelling environment, CoLeMo. CoLeMo is designed for students studying UML modelling. It can also be used as a platform for collaborative design of software. We conducted formative evaluations and a summative evaluation to improve the environment and…
MODELING MULTIPLE REPRESENTATIONS INTO SPATIAL DATA WAREHOUSES: A UML-BASED APPROACH
MODELING MULTIPLE REPRESENTATIONS INTO SPATIAL DATA WAREHOUSES: A UML-BASED APPROACH Bédard Yvan, spatial data warehouse, spatially-extended UML, Perceptory. ISPRS Commission IV, Working Group IV/1 for a spatial data warehouse. RÉSUMÉ: La création de schémas de bases de données qui incluent des géométries
Experiences using the UML profile for MARTE to stochastically model post-
Middleton, Stuart E.
Experiences using the UML profile for MARTE to stochastically model post- production interactive describe a practical approach applying the UML 2.0 standard MARTE profile to model stochastic interactiveCommHost MARTE stereotypes and find them sufficient for stochastic modelling with the exception of being unable
Towards Automatic Derivation of a Product Performance Model from a UML Software Product Line Model
Petriu, Dorina
, and the MARTE profile recently standardized by OMG for performance annotations. The source model is generic step, named "target model", is a UML model with MARTE annotations, where the variability expressed. Keywords Software Product Line, Software Performance Engineering, model transformation, UML, MARTE. 1
AN AUTOMATED TOOL FOR HDL AND CONFIGURATION FILE GENERATION FROM UML SYSTEM DESCRIPTIONS
Thornton, Mitchell
#12;AN AUTOMATED TOOL FOR HDL AND CONFIGURATION FILE GENERATION FROM UML SYSTEM DESCRIPTIONS _________________________________ Dr. Frank Coyle _________________________________ Dr. Sukumaran Nair #12;AN AUTOMATED TOOL FOR HDL An Automated Tool for HDL and Configuration File Generation from UML System Descriptions Advisor: Professor
A UML Profile for Developing Databases that Conform to the Third Manifesto
NASA Astrophysics Data System (ADS)
Eessaar, Erki
The Third Manifesto (TTM) presents the principles of a relational database language that is free of deficiencies and ambiguities of SQL. There are database management systems that are created according to TTM. Developers need tools that support the development of databases by using these database management systems. UML is a widely used visual modeling language. It provides built-in extension mechanism that makes it possible to extend UML by creating profiles. In this paper, we introduce a UML profile for designing databases that correspond to the rules of TTM. We created the first version of the profile by translating existing profiles of SQL database design. After that, we extended and improved the profile. We implemented the profile by using UML CASE system StarUML™. We present an example of using the new profile. In addition, we describe problems that occurred during the profile development.
Dependability Modeling and Assessment in UML-Based Software Development
Bernardi, Simona; Merseguer, José; Petriu, Dorina C.
2012-01-01
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
Dependability modeling and assessment in UML-based software development.
Bernardi, Simona; Merseguer, José; Petriu, Dorina C
2012-01-01
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
NASA Astrophysics Data System (ADS)
Chiosi, C.; Murdin, P.
2000-11-01
The Hertzsprung-Russell diagram (HR-diagram), pioneered independently by EJNAR HERTZSPRUNG and HENRY NORRIS RUSSELL, is a plot of the star luminosity versus the surface temperature. It stems from the basic relation for an object emitting thermal radiation as a black body: ...
Byrne, Loren
-trophic interactions, ecosystem engineering, and species' effects on the movement of energy and nutrients. This inquiry-playing activity to explore biodiversity and create ecological web diagrams Author Loren B. Byrne Department@rwu.edu Abstract In a general sense, biodiversity is an intuitively simple concept, referring to the variety
Leveraging the UML Metamodel: Expressing ORM Semantics Using a UML Profile
CUYLER,DAVID S.
2000-11-01
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.
NASA Astrophysics Data System (ADS)
Aso, N.; Ohta, K.; Ide, S.
2014-12-01
Deformation in a small volume of earth interior is expressed by a symmetric moment tensor located on a point source. The tensor contains information of characteristic directions, source amplitude, and source types such as isotropic, double-couple, or compensated-linear-vector-dipole (CLVD). Although we often assume a double couple as the source type of an earthquake, significant non-double-couple component including isotropic component is often reported for induced earthquakes and volcanic earthquakes. For discussions on source types including double-couple and non-double-couple components, it is helpful to display them using some visual diagrams. Since the information of source type has two degrees of freedom, it can be displayed onto a two-dimensional flat plane. Although the diagram developed by Hudson et al. [1989] is popular, the trace corresponding to the mechanism combined by two mechanisms is not always a smooth line. To overcome this problem, Chapman and Leaney [2012] developed a new diagram. This diagram has an advantage that a straight line passing through the center corresponds to the mechanism obtained by a combination of an arbitrary mechanism and a double-couple [Tape and Tape, 2012], but this diagram has some difficulties in use. First, it is slightly difficult to produce the diagram because of its curved shape. Second, it is also difficult to read out the ratios among isotropic, double-couple, and CLVD components, which we want to obtain from the estimated moment tensors, because they do not appear directly on the horizontal or vertical axes. In the present study, we developed another new square diagram that overcomes the difficulties of previous diagrams. This diagram is an orthogonal system of isotropic and deviatoric axes, so it is easy to get the ratios among isotropic, double-couple, and CLVD components. Our diagram has another advantage that the probability density is obtained simply from the area within the diagram if the probability density function of moment tensor's eigenvalues P(?1, ?2, ?3) depends only on the scalar moment [(?12+?22+?32)/2]0.5. Even if this is not the real case, the easiness of calculating the areal density is useful when we compare the results of analyzing real data with that of analyzing background noise.
Automated UMLS-based comparison of medical forms.
Dugas, Martin; Fritz, Fleur; Krumm, Rainer; Breil, Bernhard
2013-01-01
Medical forms are very heterogeneous: on a European scale there are thousands of data items in several hundred different systems. To enable data exchange for clinical care and research purposes there is a need to develop interoperable documentation systems with harmonized forms for data capture. A prerequisite in this harmonization process is comparison of forms. So far--to our knowledge--an automated method for comparison of medical forms is not available. A form contains a list of data items with corresponding medical concepts. An automatic comparison needs data types, item names and especially item with these unique concept codes from medical terminologies. The scope of the proposed method is a comparison of these items by comparing their concept codes (coded in UMLS). Each data item is represented by item name, concept code and value domain. Two items are called identical, if item name, concept code and value domain are the same. Two items are called matching, if only concept code and value domain are the same. Two items are called similar, if their concept codes are the same, but the value domains are different. Based on these definitions an open-source implementation for automated comparison of medical forms in ODM format with UMLS-based semantic annotations was developed. It is available as package compareODM from http://cran.r-project.org. To evaluate this method, it was applied to a set of 7 real medical forms with 285 data items from a large public ODM repository with forms for different medical purposes (research, quality management, routine care). Comparison results were visualized with grid images and dendrograms. Automated comparison of semantically annotated medical forms is feasible. Dendrograms allow a view on clustered similar forms. The approach is scalable for a large set of real medical forms. PMID:23861827
Evaluation of Software Product Line Modeling Methods: Feature-Oriented vs. UML-based Pardigms
Reinhartz-Berger, Iris
, which is a feature- oriented method, and ADOM, which is defined with a UML profile. Finally, we perform better understand the locations at which variability occurs and the ways to realize variability in ADOM
Experimenting with the Comprehension of Feature-Oriented and UML-based Core Assets
Reinhartz-Berger, Iris
the comprehension of core assets specification in feature-oriented CBFM and UML-based ADOM. The results showed to realize variability in ADOM. Keywords: variability, software product line engineering, domain analysis
Liu, Hongfang; Johnson, Stephen B.; Friedman, Carol
2002-01-01
Motivation. The UMLS has been used in natural language processing applications such as information retrieval and information extraction systems. The mapping of free-text to UMLS concepts is important for these applications. To improve the mapping, we need a method to disambiguate terms that possess multiple UMLS concepts. In the general English domain, machine-learning techniques have been applied to sense-tagged corpora, in which senses (or concepts) of ambiguous terms have been annotated (mostly manually). Sense disambiguation classifiers are then derived to determine senses (or concepts) of those ambiguous terms automatically. However, manual annotation of a corpus is an expensive task. We propose an automatic method that constructs sense-tagged corpora for ambiguous terms in the UMLS using MEDLINE abstracts. Methods. For a term W that represents multiple UMLS concepts, a collection of MEDLINE abstracts that contain W is extracted. For each abstract in the collection, occurrences of concepts that have relations with W as defined in the UMLS are automatically identified. A sense-tagged corpus, in which senses of W are annotated, is then derived based on those identified concepts. The method was evaluated on a set of 35 frequently occurring ambiguous biomedical abbreviations using a gold standard set that was automatically derived. The quality of the derived sense-tagged corpus was measured using precision and recall. Results. The derived sense-tagged corpus had an overall precision of 92.9% and an overall recall of 47.4%. After removing rare senses and ignoring abbreviations with closely related senses, the overall precision was 96.8% and the overall recall was 50.6%. Conclusions. UMLS conceptual relations and MEDLINE abstracts can be used to automatically acquire knowledge needed for resolving ambiguity when mapping free-text to UMLS concepts. PMID:12386113
Trace element indiscrimination diagrams
NASA Astrophysics Data System (ADS)
Li, Chusi; Arndt, Nicholas T.; Tang, Qingyan; Ripley, Edward M.
2015-09-01
We tested the accuracy of trace element discrimination diagrams for basalts using new datasets from two petrological databases, PetDB and GEOROC. Both binary and ternary diagrams using Zr, Ti, V, Y, Th, Hf, Nb, Ta, Sm, and Sc do a poor job of discriminating between basalts generated in various tectonic environments (continental flood basalt, mid-ocean ridge basalt, ocean island basalt, oceanic plateau basalt, back-arc basin basalt, and various types of arc basalt). The overlaps between the different types of basalt are too large for the confident application of such diagrams when used in the absence of geological and petrological constraints. None of the diagrams we tested can clearly discriminate between back-arc basin basalt and mid-ocean ridge basalt, between continental flood basalt and oceanic plateau basalt, and between different types of arc basalt (intra-oceanic, island and continental arcs). Only ocean island basalt and some mid-ocean ridge basalt are generally distinguishable in the diagrams, and even in this case, mantle-normalized trace element patterns offer a better solution for discriminating between the two types of basalt.
Jones, Gregory; Wang, John E.
2005-06-15
To capture important physical properties of a spacetime we construct a new diagram, the card diagram, which accurately draws generalized Weyl spacetimes in arbitrary dimensions by encoding their global spacetime structure, singularities, horizons, and some aspects of causal structure including null infinity. Card diagrams draw only nontrivial directions providing a clearer picture of the geometric features of spacetimes as compared to Penrose diagrams, and can change continuously as a function of the geometric parameters. One of our main results is to describe how Weyl rods are traversable horizons and the entirety of the spacetime can be mapped out. We review Weyl techniques and as examples we systematically discuss properties of a variety of solutions including Kerr-Newman black holes, black rings, expanding bubbles, and recent spacelike-brane solutions. Families of solutions will share qualitatively similar cards. In addition we show how card diagrams not only capture information about a geometry but also its analytic continuations by providing a geometric picture of analytic continuation. Weyl techniques are generalized to higher dimensional charged solutions and applied to generate perturbations of bubble and S-brane solutions by Israel-Khan rods.
NASA Astrophysics Data System (ADS)
Franco, Sebastián; Galloni, Daniele; Penante, Brenda; Wen, Congkao
2015-06-01
We initiate a systematic study of non-planar on-shell diagrams in SYM and develop powerful technology for doing so. We introduce canonical variables generalizing face variables, which make the d log form of the on-shell form explicit. We make significant progress towards a general classification of arbitrary on-shell diagrams by means of two classes of combinatorial objects: generalized matching and matroid polytopes. We propose a boundary measurement that connects general on-shell diagrams to the Grassmannian. Our proposal exhibits two important and non-trivial properties: positivity in the planar case and it matches the combinatorial description of the diagrams in terms of generalized matroid polytopes. Interestingly, non-planar diagrams exhibit novel phenomena, such as the emergence of constraints on Plücker coordinates beyond Plücker relations when deleting edges, which are neatly captured by the generalized matching and matroid polytopes. This behavior is tied to the existence of a new type of poles in the on-shell form at which combinations of Plücker coordinates vanish. Finally, we introduce a prescription, applicable beyond the MHV case, for writing the on-shell form as a function of minors directly from the graph.
Nonthermal Radio Emission and the HR Diagram
NASA Technical Reports Server (NTRS)
Gibson, D. M.
1985-01-01
Perhaps the most reliable indicator of non-radiative heating/momentum in a stellar atmosphere is the presence of nonthermal radio emission. To date, 77 normal stellar objects have been detected and identified as nonthermal sources. These stellar objects are tabulated herein. It is apparent that non-thermal radio emission is not ubiquitous across the HR diagram. This is clearly the case for the single stars; it is not as clear for the binaries unless the radio emission is associated with their late-type components. Choosing to make this association, the single stars and the late-type components are plotted together. The following picture emerges: (1) there are four locations on the HR diagram where non-thermal radio stars are found; (2) the peak incoherent 5 GHz luminosities show a suprisingly small range for stars within each class; (3) the fraction of stellar energy that escapes as radio emission can be estimated by comparing the integrated maximum radio luminosity to the bolometric luminosity; (4) there are no apparent differences in L sub R between binaries with two cool components, binaries with one hot and one cool component, and single stars for classes C and D; and (5) The late-type stars (classes B, C, and D) are located in parts of the HR diagram where there is reason to suspect that the surfaces of the stars are being braked with respect to their interiors.
ERIC Educational Resources Information Center
Rosengrant, David
2011-01-01
Multiple representations are a valuable tool to help students learn and understand physics concepts. Furthermore, representations help students learn how to think and act like real scientists. These representations include: pictures, free-body diagrams, energy bar charts, electrical circuits, and, more recently, computer simulations and…
Source Inversion and Matching in the UMLS Metathesauras*
Olson, N.E.; Sherertz, D.D.; Tuttle, M.S.; Erlbaum, M.S.
1990-01-01
One of three knowledge sources being developed as part of the NLM's UMLS Project is a biomedical thesaurus, called the Metathesaurus. The Metathesaurus contains inter-term relationships across six biomedical nomenclatures and classification systems, derivable from lexical mapping techniques. The first public version of the Metathesaurus, called META-1, was built in two stages -- first, source inversion and second, source matching. During the Spring of 1989, “official” versions for the six sources were obtained in machine-readable form. Source specific techniques were derived empirically to analyze the information structure and content of each source. The results of each analysis were used to guide the “inversion” of the corresponding source, resulting in a homogeneous representation for all sources. The core concepts of META-1 come primarily from MEDLINE index terms (MeSH). Previous work on lexical mapping methodology developed algorithmic methods to link concepts in different sources. These methods were refined iteratively, and used to implement a META-1 “matching engine”. The initial version of META-1 was constructed with this engine, by matching the META-1 core concepts to the other sources. This version of META-1 was edited and enhanced by domain experts, after the inclusion of supplementary information, to produce the first publicly released version of META-1.
FORMALLY MODELING UML AND ITS EVOLUTION: A HOLISTIC APPROACH
to the pervasiveness of diagrams in human communication and be- cause of the increasing availability of graphical Engineering Research Group, Department of Informatics: Languages and Systems, University of Murcia, Spain #3 of Informatics: Languages and Systems, University of Murcia, Spain aleman@dif.um.es To my father Abstract Due
Mapping the ATC classification to the UMLS metathesaurus: some pragmatic applications.
Merabti, Tayeb; Abdoune, Hocine; Letord, Catherine; Sakji, Saoussen; Joubert, Michel; Darmoni, Stefan J
2011-01-01
ATC classification is a WHO international classification used to classify drugs. The aim of this paper is to evaluate two lexical methods in English and in French to map ATC to UMLS. Several applications have been impemented to illustrate the use of the ATC mapping in English and French: (a) MeSH translation in Norwegian, (b) Drug Information Portal, and (c) ATC to PubMed tool. Two lexical methods were used to map ATC to UMLS. The first approach used a French natural language processing tool to map French terms of ATC to the French terminologies of UMLS. The second approach used the MetaMap tool to map English terms of ATC to UMLS. The English MetaMap provides slightly more mappings than the French NLP tool (3,170 vs. 2,992). On the other hand, the French NLP tool provides a slightly better precision than MetaMap (88% vs. 86%). Using a manual mapping between ATC and MeSH, the union of the validated mappings between ATC and MeSH provides 2,824 mappings (68.7% of ATC codes of the fifth level). Lexical methods are powerful methods to map health terminologies to the UMLS Metathesaurus. Manual mapping is still necessary to complete the mapping. PMID:21685626
NASA Astrophysics Data System (ADS)
Rosengrant, David
2011-01-01
Multiple representations are a valuable tool to help students learn and understand physics concepts. Furthermore, representations help students learn how to think and act like real scientists.2 These representations include: pictures, free-body diagrams,3 energy bar charts,4 electrical circuits, and, more recently, computer simulations and animations.5 However, instructors have limited choices when they want to help their students understand impulse and momentum. One of the only available options is the impulse-momentum bar chart.6 The bar charts can effectively show the magnitude of the momentum as well as help students understand conservation of momentum, but they do not easily show the actual direction. This paper highlights a new representation instructors can use to help their students with momentum and impulse—the impulse-momentum diagram (IMD).
The Massive Thermal Basketball Diagram
Andersen, J O; Strickland, Michael T; Andersen, Jens O.; Braaten, Eric; Strickland, Michael
2000-01-01
The "basketball diagram" is a three-loop vacuum diagram for a scalar fieldtheory that cannot be expressed in terms of one-loop diagrams. We calculatethis diagram for a massive scalar field at nonzero temperature, reducing it toexpressions involving three-dimensional integrals that can be easily evaluatednumerically. We use this result to calculate the free energy for a massivescalar field with a phi^4 interaction to three-loop order.
The Massive Thermal Basketball Diagram
Jens O. Andersen; Eric Braaten; Michael Strickland
2000-04-14
The "basketball diagram" is a three-loop vacuum diagram for a scalar field theory that cannot be expressed in terms of one-loop diagrams. We calculate this diagram for a massive scalar field at nonzero temperature, reducing it to expressions involving three-dimensional integrals that can be easily evaluated numerically. We use this result to calculate the free energy for a massive scalar field with a phi^4 interaction to three-loop order.
Wilms, R Scott; Carlson, Bryan; Coons, James; Kubic, William
2008-01-01
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.
Penguin-like diagrams from the standard model
Ping, Chia Swee
2015-04-24
The Standard Model is highly successful in describing the interactions of leptons and quarks. There are, however, rare processes that involve higher order effects in electroweak interactions. One specific class of processes is the penguin-like diagram. Such class of diagrams involves the neutral change of quark flavours accompanied by the emission of a gluon (gluon penguin), a photon (photon penguin), a gluon and a photon (gluon-photon penguin), a Z-boson (Z penguin), or a Higgs-boson (Higgs penguin). Such diagrams do not arise at the tree level in the Standard Model. They are, however, induced by one-loop effects. In this paper, we present an exact calculation of the penguin diagram vertices in the ‘tHooft-Feynman gauge. Renormalization of the vertex is effected by a prescription by Chia and Chong which gives an expression for the counter term identical to that obtained by employing Ward-Takahashi identity. The on-shell vertex functions for the penguin diagram vertices are obtained. The various penguin diagram vertex functions are related to one another via Ward-Takahashi identity. From these, a set of relations is obtained connecting the vertex form factors of various penguin diagrams. Explicit expressions for the gluon-photon penguin vertex form factors are obtained, and their contributions to the flavor changing processes estimated.
Penguin-like diagrams from the standard model
NASA Astrophysics Data System (ADS)
Ping, Chia Swee
2015-04-01
The Standard Model is highly successful in describing the interactions of leptons and quarks. There are, however, rare processes that involve higher order effects in electroweak interactions. One specific class of processes is the penguin-like diagram. Such class of diagrams involves the neutral change of quark flavours accompanied by the emission of a gluon (gluon penguin), a photon (photon penguin), a gluon and a photon (gluon-photon penguin), a Z-boson (Z penguin), or a Higgs-boson (Higgs penguin). Such diagrams do not arise at the tree level in the Standard Model. They are, however, induced by one-loop effects. In this paper, we present an exact calculation of the penguin diagram vertices in the `tHooft-Feynman gauge. Renormalization of the vertex is effected by a prescription by Chia and Chong which gives an expression for the counter term identical to that obtained by employing Ward-Takahashi identity. The on-shell vertex functions for the penguin diagram vertices are obtained. The various penguin diagram vertex functions are related to one another via Ward-Takahashi identity. From these, a set of relations is obtained connecting the vertex form factors of various penguin diagrams. Explicit expressions for the gluon-photon penguin vertex form factors are obtained, and their contributions to the flavor changing processes estimated.
Penguin-like Diagrams from the Standard Model
Swee-Ping Chia
2015-04-17
The Standard Model is highly successful in describing the interactions of leptons and quarks. There are, however, rare processes that involve higher order effects in electroweak interactions. One specific class of processes is the penguin-like diagram. Such class of diagrams involves the neutral change of quark flavours accompanied by the emission of a gluon (gluon penguin), a photon (photon penguin), a gluon and a photon (gluon-photon penguin), a Z-boson (Z penguin), or a Higgs-boson (Higgs penguin). Such diagrams do not arise at the tree level in the Standard Model. They are, however, induced by one-loop effects. In this paper, we present an exact calculation of the penguin diagram vertices in the tHooft-Feynman gauge. Renormalization of the vertex is effected by a prescription by Chia and Chong which gives an expression for the counter term identical to that obtained by employing Ward-Takahashi identity. The on-shell vertex functions for the penguin diagram vertices are obtained. The various penguin diagram vertex functions are related to one another via Ward-Takahashi identity. From these, a set of relations is obtained connecting the vertex form factors of various penguin diagrams. Explicit expressions for the gluon-photon penguin vertex form factors are obtained, and their contributions to the flavor changing processes estimated.
Wagner, FlÃ¡vio Rech
Multi-objective Design Space Exploration based on UML Marcio F. da S. Oliveira, Eduardo W. BriÃ£o, flavio}@inf.ufrgs.br Abstract. This paper proposes a Design Space Exploration (DSE) framework using UML requiring costly hardware synthesis and code generation steps. A design space exploration scenario
2001 Mercury Computer Systems, Inc. UML 2.0 Redux for HPECUML 2.0 Redux for HPEC
Kepner, Jeremy
© 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
Varghese, Julian; Schulze Sünninghausen, Sarah; Dugas, Martin
2015-01-01
Standardized quality assurance (QA) plays an import role to maintain and develop success of cardiovascular procedures (CP). Well-established QA models from Germany could be shared in a form repository for world-wide reuse and exchange. Therefore, we collected the complete set of all quality QA forms for CP, which is obligatory to be filled out by all German health service providers. Original forms were converted into standardized study forms according to ODM (Operational Data Model) and translated into English. Common medical concepts and clusters of medical concepts were identified based on UMLS coding of form items. All forms are available on the web as multilingual ODM documents. UMLS concept coverage analysis indicates 88% coverage with few but critically important definition gaps, which need to be addressed by UMLS. PMID:26262169
Derivation of xUML Models Multiple Relationships
Browne, James C.
..* organizes #12;4 9/13/2008 Specification Classes An airplane leasing company owns many instances of a given airplane and leases several different types of airplanes. Each airplane is characterized by a model number, operational status and number of hours flown for each airplane. #12;5 9/13/2008 Specification classes Aircraft
NASA Astrophysics Data System (ADS)
Brandhuber, A.; Travaglini, G.
2007-03-01
Over the past two years, the use of on-shell techniques has deepened our understanding of the S-matrix of gauge theories and led to the calculation of many new scattering amplitudes. In these notes we review a particular on-shell technique developed recently, the quantum MHV diagrams, and discuss applications to one-loop amplitudes. Furthermore, we briefly discuss the application of D-dimensional generalised unitarity to the calculation of scattering amplitudes in non-supersymmetric Yang-Mills.
Csaki, Csaba; Grossman, Yuval; Tanedo, Philip; Tsai, Yuhsin
2011-04-01
We present an analysis of the loop-induced magnetic dipole operator in the Randall-Sundrum model of a warped extra dimension with anarchic bulk fermions and an IR brane-localized Higgs. These operators are finite at one-loop order and we explicitly calculate the branching ratio for {mu}{yields}e{gamma} using the mixed position/momentum space formalism. The particular bound on the anarchic Yukawa and Kaluza-Klein (KK) scales can depend on the flavor structure of the anarchic matrices. It is possible for a generic model to either be ruled out or unaffected by these bounds without any fine-tuning. We quantify how these models realize this surprising behavior. We also review tree-level lepton flavor bounds in these models and show that these are on the verge of tension with the {mu}{yields}e{gamma} bounds from typical models with a 3 TeV Kaluza-Klein scale. Further, we illuminate the nature of the one-loop finiteness of these diagrams and show how to accurately determine the degree of divergence of a five-dimensional loop diagram using both the five-dimensional and KK formalism. This power counting can be obfuscated in the four-dimensional Kaluza-Klein formalism and we explicitly point out subtleties that ensure that the two formalisms agree. Finally, we remark on the existence of a perturbative regime in which these one-loop results give the dominant contribution.
The Compliance Testing of Software Tools with respect to the UML standards specification
Finkelstein, Anthony
The Compliance Testing of Software Tools with respect to the UML standards specification - the Argo compliance test generation from modeling standards specifications. When employed in our framework tools can be tested for standards compliance and how test results can be analyzed to diagnose the causes
Modelling Geospatial Application Databases using UML-based Repositories Aligned with International Abstract: This paper presents the result of recent work on the use of geospatial repositories to store and database concepts, a geospatial repository can be defined as a collection of (meta) data structured
The Trans-Atlantic Cable Charles Byrne (Charles Byrne@uml.edu)
Byrne, Charles
The Trans-Atlantic Cable Charles Byrne (Charles Byrne@uml.edu) Department of Mathematical Sciences. The laying of the trans-Atlantic cable was, in many ways, the 19th century equivalent of landing a man what England and the US could possibly have to say to one another. The laying of the trans
JACQUELINE FIDLER MOLONEY, Ed.D. Jacqueline_Moloney@uml.edu
Massachusetts at Lowell, University of
1 JACQUELINE FIDLER MOLONEY, Ed.D. Jacqueline_Moloney@uml.edu 978-934-2943 PROFESSIONAL EXPERIENCE-career salaries earned by its graduates, according to national surveys. In addition to serving as the university student organizations and Division I athletics. Long considered a commuter school, UMass Lowell now has
A Pilot Study of Comparative Customer Comprehension between Extreme X-Machine and UML Models
Simons, Anthony J. H.
's vision [8]. The agile movement has begun to strengthen the relationship between developers and customersA Pilot Study of Comparative Customer Comprehension between Extreme X-Machine and UML Models. Keywords Extreme X-Machines, XXM, empirical, formal method, testing, customer, requirements elicitation
Solbrig, Harold R; Chute, Christopher G
2012-01-01
Objective The objective of this study is to develop an approach to evaluate the quality of terminological annotations on the value set (ie, enumerated value domain) components of the common data elements (CDEs) in the context of clinical research using both unified medical language system (UMLS) semantic types and groups. Materials and methods The CDEs of the National Cancer Institute (NCI) Cancer Data Standards Repository, the NCI Thesaurus (NCIt) concepts and the UMLS semantic network were integrated using a semantic web-based framework for a SPARQL-enabled evaluation. First, the set of CDE-permissible values with corresponding meanings in external controlled terminologies were isolated. The corresponding value meanings were then evaluated against their NCI- or UMLS-generated semantic network mapping to determine whether all of the meanings fell within the same semantic group. Results Of the enumerated CDEs in the Cancer Data Standards Repository, 3093 (26.2%) had elements drawn from more than one UMLS semantic group. A random sample (n=100) of this set of elements indicated that 17% of them were likely to have been misclassified. Discussion The use of existing semantic web tools can support a high-throughput mechanism for evaluating the quality of large CDE collections. This study demonstrates that the involvement of multiple semantic groups in an enumerated value domain of a CDE is an effective anchor to trigger an auditing point for quality evaluation activities. Conclusion This approach produces a useful quality assurance mechanism for a clinical study CDE repository. PMID:22511016
"UML Quiz": Automatic Conversion of Web-Based E-Learning Content in Mobile Applications
ERIC Educational Resources Information Center
von Franqué, Alexander; Tellioglu, Hilda
2014-01-01
Many educational institutions use Learning Management Systems to provide e-learning content to their students. This often includes quizzes that can help students to prepare for exams. However, the content is usually web-optimized and not very usable on mobile devices. In this work a native mobile application ("UML Quiz") that imports…
Notes on The Laplace Transform and the Ozone Charles Byrne (Charles Byrne@uml.edu)
Byrne, Charles
Notes on The Laplace Transform and the Ozone Layer Charles Byrne (Charles Byrne@uml.edu) Department Transform and the Ozone Layer In farfield propagation problems, we often find the measured data . Within the ozone layer, the amount of UV radiation scattered in the direction is given by S(, 0)I(0)e
Wong, Weng Fai
proposed. Among these, the Open Core Protocol (OCP) by OCP-IP [13] has gained wide industrial acceptance. Today, many IPs are OCP-compliant. However, for existing non OCP compliant IP cores, it is expensiveA UML-Based Approach for Heterogeneous IP Integration Abstract - With increasing availability
Event-triggered vs. Time-Triggered communications with UML MARTE Frdric Mallet, Robert de Simone
Mallet, FrÃ©dÃ©ric
Event-triggered vs. Time-Triggered communications with UML MARTE FrÃ©dÃ©ric Mallet, Robert de Simone and MARTE) to model these two kinds of communications. Specifically we focus on the Time facilities of MARTE Language) profile for MARTE (Modeling and Analysis of Real-Time and Embedded systems) [3], recently adopted
Combining Image Features, Case Descriptions and UMLS Concepts to Improve Retrieval of Medical Images
Ruiz, Miguel E.
Combining Image Features, Case Descriptions and UMLS Concepts to Improve Retrieval of Medical Images Miguel E. Ruiz, Ph.D. State University of New York at Buffalo Buffalo, NY Abstract This paper evaluates a system, UBMedTIRS, for retrieval of medical images. The system uses a combination of image
Cimino, James J.
, it is possible for it to have multiple semantic types. Inter-term relationships (including parent-child concepts, 1817 ambiguous concepts, and 544 relationships between concepts that were inconsistent relationships) from the source vocabularies provide inter-concept relationships. Figure 1 (based on UMLS
Miller, Trudi; Leroy, Gondy
2008-01-01
Increased availability of and reliance on written health information can tax the abilities of unskilled readers. We are developing a system that uses natural language processing to extract phrases, identify medical terms using the UMLS, and visualize the propositions. This system substantially reduces the amount of information a consumer must read, while providing an alternative to traditional prose based text. PMID:18999136
UML specification of distributed system environments D.H.Akehurst, A.G.Waters
Kent, University of
UML specification of distributed system environments D.H.Akehurst, A.G.Waters Technical Report : 18-99 Computing Laboratory, University of Kent at Canterbury, Canterbury, Kent CT2 7NF, UK {D.H.Akehurst, A.G.Waters consideration is given to the context in which the system operates and the physical environment that empowers
Model-Based Testing for Model-Driven Development with UML/DSL
Peleska, Jan - Fachbereich 3
environment Test Engine (TE) SUT Component 1 SUT Component 2 TE can write TE can observe TE cannot observe #12ICTAC 2008 Model-Based Testing for Model- Driven Development with UML/DSL Dr. M. Oliver Möller of Bremen #12;Möller, Löding and Peleska ICTAC 2008 Outline Model-based testing is ... Development models
A GRADUATE'S ROLE IN TECHNOLOGY TRANSFER: FROM REQUIREMENTS TO DESIGN WITH UML
Gibson, J. Paul
A GRADUATE'S ROLE IN TECHNOLOGY TRANSFER: FROM REQUIREMENTS TO DESIGN WITH UML Stephen Hallinan in the discipline of software engineering and is often categorised under the umbrella of technology transfer analyse the role of a recently qualified stu- dent1 in facilitating technology transfer in the form
Diagonal Slices of 3D Young Diagrams in the Approach of Maya Diagrams
NASA Astrophysics Data System (ADS)
Cai, Li-Qiang; Wang, Li-Fang; Wu, Ke; Yang, Jie
2014-09-01
According to the correspondence between 2D Young diagrams and Maya diagrams and the relation between 2D and 3D Young diagrams, we construct 3D Young diagrams in the approach of Maya diagrams. Moreover, we formulate the generating function of 3D Young diagrams, which is the MacMahon function in terms of Maya diagrams.
English Pyramids: Using Hierarchical Diagrams for Communication Activities.
ERIC Educational Resources Information Center
Johnson, Tia; Sheetz-Brunetti, Judy
The pyramid, or hierarchical diagram, is used in teaching writing English as a second language (ESL) as a visual representation of the way English speakers and writers organize ideas, for comparison with discourse organization in other cultures. A common problem of ESL students is an inability to organize ideas hierarchically. One class activity…
ERIC Educational Resources Information Center
Barnum, Dennis W.
1982-01-01
Potential-pH diagrams show the domains of redoxpotential and pH in which major species are most stable. Constructing such diagrams provides students with opportunities to decide what species must be considered, search literature for equilibrium constants and free energies of formation, and practice in using the Nernst equation. (Author/JN)
Resummation of Cactus Diagrams in the Clover Improved Lattice Formulation of QCD
Panagopoulos, H
1999-01-01
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.
Resummation of Cactus Diagrams in the Clover Improved Lattice Formulation of QCD
H. Panagopoulos; E. Vicari
1998-09-02
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.
Teaching Tip: Using Activity Diagrams to Model Systems Analysis Techniques: Teaching What We Preach
ERIC Educational Resources Information Center
Lending, Diane; May, Jeffrey
2013-01-01
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…
Making UML "hip": A First Experience Report on Using Modern
Stevens, Perdita
class- room experience for the students. For several years, we used Web-based out-of-the-box e-learning the lecture videos or a combination of the three. Furthermore, we provide support via online forums on the e-learning platform TUWEL2 , a Moodle3 adaptation of the Vienna University of Technology. We offer various e-learning
A generalized Ramanujan Master Theorem applied to the evaluation of Feynman diagrams
Ivan Gonzalez; V. H. Moll; Ivan Schmidt
2011-03-03
Ramanujan Master Theorem is a technique developed by the indian mathematician S. Ramanujan to evaluate a class of definite integrals. This technique is used here to calculate the values of integrals associated with specific Feynman diagrams.
Using WordNet to improve the mapping of data elements to UMLS for data sources integration.
Mougin, Fleur; Burgun, Anita; Bodenreider, Olivier
2006-01-01
Each biomedical system has its own way of naming the pieces of information it contains, i.e., of defining its data elements (DEs). Integrating DEs facilitates the integration of biomedical resources. However, the mapping of DEs to the UMLS is ambiguous in many cases, when any correspondence is found at all. We propose to evaluate the potential contribution of a more general terminology: WordNet. Our method is based on synonyms, definitions, and structural properties of the terminologies. We applied it to a set of 474 DEs extracted from eleven biomedical sources. We show that WordNet can improve the direct mapping of DEs to UMLS when used to validate and disambiguate UMLS direct mappings. WordNet can also help identify indirect mappings of DEs to the UMLS. PMID:17238406
Penguin-like Diagrams from the Standard Model
Chia, Swee-Ping
2015-01-01
The Standard Model is highly successful in describing the interactions of leptons and quarks. There are, however, rare processes that involve higher order effects in electroweak interactions. One specific class of processes is the penguin-like diagram. Such class of diagrams involves the neutral change of quark flavours accompanied by the emission of a gluon (gluon penguin), a photon (photon penguin), a gluon and a photon (gluon-photon penguin), a Z-boson (Z penguin), or a Higgs-boson (Higgs penguin). Such diagrams do not arise at the tree level in the Standard Model. They are, however, induced by one-loop effects. In this paper, we present an exact calculation of the penguin diagram vertices in the tHooft-Feynman gauge. Renormalization of the vertex is effected by a prescription by Chia and Chong which gives an expression for the counter term identical to that obtained by employing Ward-Takahashi identity. The on-shell vertex functions for the penguin diagram vertices are obtained. The various penguin diagra...
Scattering equations and Feynman diagrams
NASA Astrophysics Data System (ADS)
Baadsgaard, Christian; Bjerrum-Bohr, N. E. J.; Bourjaily, Jacob L.; Damgaard, Poul H.
2015-09-01
We show a direct matching between individual Feynman diagrams and integration measures in the scattering equation formalism of Cachazo, He and Yuan. The connection is most easily explained in terms of triangular graphs associated with planar Feynman diagrams in ? 3-theory. We also discuss the generalization to general scalar field theories with ? p interactions, corresponding to polygonal graphs involving vertices of order p. Finally, we describe how the same graph-theoretic language can be used to provide the precise link between individual Feynman diagrams and string theory integrands.
Varghese, Julian; Sünninghausen, Sarah Schulze; Dugas, Martin
2015-01-01
Quality assurance (QA) is a key factor to evaluate success of organ transplantations. In Germany QA documentation is progressively developed and enforced by law. Our objective is to share QA models from Germany in a standardized format within a form repository for world-wide reuse and exchange. Original QA forms were converted into standardized study forms according to the Operational Data Model (ODM) and shared for open access in an international forms repository. Form elements were translated into English and semantically enriched with Concept Unique Identifiers from the Unified Medical Language System (UMLS) based on medical expert decision. All forms are available on the web as multilingual ODM documents. UMLS concept coverage analysis indicates 92% coverage with few but critically important definition gaps. New content and infrastructure for harmonized documentation forms is provided in the domain of organ transplantations enabling world-wide reuse and exchange. PMID:26063252
Resummation of Cactus Diagrams in Lattice QCD, to all Orders
H. Panagopoulos; E. Vicari
1999-09-08
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.
Resummation of Cactus Diagrams in Lattice QCD, to all Orders
Panagopoulos, H
2000-01-01
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.
The Hertzsprung-Russell Diagram.
ERIC Educational Resources Information Center
Woodrow, Janice
1991-01-01
Describes a classroom use of the Hertzsprung-Russell diagram to infer not only the properties of a star but also the star's probable stage in evolution, life span, and age of the cluster in which it is located. (ZWH)
History of constant life diagrams
Sendeckyj, G.P.
1997-12-31
A historical review of the early development of constant life diagrams (variously referred to as Goodman, Smith, Haigh, etc. diagrams) is presented. It is shown that neither Gerber nor Goodman published the first constant life diagram. Goodman never drew what is now called the Goodman diagram and the so-called Goodman law was in general engineering use before Goodman`s book first appeared. Johnson derived an equation that is equivalent to the so-called Goodman law, published it two years before Goodman`s book appeared, and pointed out that it was consistent with an equation in common engineering use. The first books on fatigue of metals introduced citation inaccuracies, which were propagated by subsequent authors. 40 refs., 5 figs.
ERIC Educational Resources Information Center
Willson, William Wynne
1977-01-01
The author recommends the use of flow charting to help students understand the manipulation of algebraic formulae. He identifies some problems with flow charts and suggests an alternative method of constructing flow diagrams. (SD)
Comparison of UMLS terminologies to identify risk of heart disease using clinical notes.
Shivade, Chaitanya; Malewadkar, Pranav; Fosler-Lussier, Eric; Lai, Albert M
2015-12-01
The second track of the 2014 i2b2 challenge asked participants to automatically identify risk factors for heart disease among diabetic patients using natural language processing techniques for clinical notes. This paper describes a rule-based system developed using a combination of regular expressions, concepts from the Unified Medical Language System (UMLS), and freely-available resources from the community. With a performance (F1=90.7) that is significantly higher than the median (F1=87.20) and close to the top performing system (F1=92.8), it was the best rule-based system of all the submissions in the challenge. We also used this system to evaluate the utility of different terminologies in the UMLS towards the challenge task. Of the 155 terminologies in the UMLS, 129 (76.78%) have no representation in the corpus. The Consumer Health Vocabulary had very good coverage of relevant concepts and was the most useful terminology for the challenge task. While segmenting notes into sections and lists has a significant impact on the performance, identifying negations and experiencer of the medical event results in negligible gain. PMID:26375493
Phase diagrams of decomposing nanoalloys
NASA Astrophysics Data System (ADS)
Shirinyan, A. S.; Gusak, A. M.
2004-02-01
The thermodynamics of nucleation and decomposition in small isolated particles are considered. There exist three possibilities: phase separation, prohibition of decomposition and a metastable state. We investigate the peculiarities of phase diagrams related to depletion of the nanosize parent phase even at the nucleation stage. For small particles the equilibrium diagram becomes split (and shifted and size dependent). Concentration, size and temperature hystereses take place. Size-dependent 'critical supersaturation', increasing with decreasing size, has been analysed.
Gopalakrishnan, K.
2011 33 97% 91% December 2012 2012 31 100% 93% December 2013 2013 32 100% 94% Class 2014 2014 31 100 Number: Report Date: Definitions of the report headings are provided at the end of the report. All information is current as of the date the report was generated. Five Year First Time Taker Average Pass Rate
Fast Formal Analysis of Requirements via "Topoi Diagrams"
NASA Technical Reports Server (NTRS)
Menzies, Tim; Powell, John; Houle, Michael E.; Kelly, John C. (Technical Monitor)
2001-01-01
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.
Automatically Assessing Graph-Based Diagrams
ERIC Educational Resources Information Center
Thomas, Pete; Smith, Neil; Waugh, Kevin
2008-01-01
To date there has been very little work on the machine understanding of imprecise diagrams, such as diagrams drawn by students in response to assessment questions. Imprecise diagrams exhibit faults such as missing, extraneous and incorrectly formed elements. The semantics of imprecise diagrams are difficult to determine. While there have been…
Speedith: a diagrammatic reasoner for spider diagrams
Jamnik, Mateja
Speedith: a diagrammatic reasoner for spider diagrams Matej Urbas1 , Mateja Jamnik1 , Gem Stapleton for the language of spider diagrams. Spider diagrams are a well-known logic for which there is a sound and complete prover Speedith. Speedith's domain is the language of spider diagrams. It allows us to apply diagrammatic
Phase diagram of water between hydrophobic surfaces.
Koga, Kenichiro; Tanaka, Hideki
2005-03-01
Molecular dynamics simulations demonstrate that there are at least two classes of quasi-two-dimensional solid water into which liquid water confined between hydrophobic surfaces freezes spontaneously and whose hydrogen-bond networks are as fully connected as those of bulk ice. One of them is the monolayer ice and the other is the bilayer solid which takes either a crystalline or an amorphous form. Here we present the phase transformations among liquid, bilayer amorphous (or crystalline) ice, and monolayer ice phases at various thermodynamic conditions, then determine curves of melting, freezing, and solid-solid structural change on the isostress planes where temperature and intersurface distance are variable, and finally we propose a phase diagram of the confined water in the temperature-pressure-distance space. PMID:15836349
... With Robert Irvine Pregnant? What to Expect Birthing Classes KidsHealth > Parents > Pregnancy & Newborn Center > Preparing for Parenthood > ... mom and healthy baby. Continue What Types of Classes Are Available? Many childbirth classes embrace a particular ...
Universal Jamming Phase Diagram in the Hard-Sphere Limit
Thomas K. Haxton; Michael Schmiedeberg; Andrea J. Liu
2010-11-30
We present a new formulation of the jamming phase diagram for a class of glass-forming fluids consisting of spheres interacting via finite-ranged repulsions at temperature $T$, packing fraction $\\phi$ or pressure $p$, and applied shear stress $\\Sigma$. We argue that the natural choice of axes for the phase diagram are the dimensionless quantities $T/p\\sigma^3$, $p\\sigma^3/\\epsilon$, and $\\Sigma/p$, where $T$ is the temperature, $p$ is the pressure, $\\Sigma$ is the stress, $\\sigma$ is the sphere diameter, $\\epsilon$ is the interaction energy scale, and $m$ is the sphere mass. We demonstrate that the phase diagram is universal at low $p\\sigma^3/\\epsilon$; at low pressure, observables such as the relaxation time are insensitive to details of the interaction potential and collapse onto the values for hard spheres, provided the observables are non-dimensionalized by the pressure. We determine the shape of the jamming surface in the jamming phase diagram, organize previous results in relation to the jamming phase diagram, and discuss the significance of various limits.
Enhanced Pomeron diagrams: re-summation of unitarity cuts
S. Ostapchenko
2007-11-21
Unitarity cuts of enhanced Pomeron diagrams are analyzed in the framework of the Reggeon Field Theory. Assuming the validity of the Abramovskii-Gribov-Kancheli cutting rules, we derive a complete set of cut non-loop enhanced graphs and observe important cancellations between certain sub-classes of the latter. We demonstrate also how the present method can be generalized to take into consideration Pomeron loop contributions.
Wernerfelt, Birger
2008-01-15
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 ...
Voronoi Diagrams and Spring Rain
ERIC Educational Resources Information Center
Perham, Arnold E.; Perham, Faustine L.
2011-01-01
The goal of this geometry project is to use Voronoi diagrams, a powerful modeling tool across disciplines, and the integration of technology to analyze spring rainfall from rain gauge data over a region. In their investigation, students use familiar equipment from their mathematical toolbox: triangles and other polygons, circumcenters and…
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
A normalized lexical lookup approach to identifying UMLS concepts in free text.
Bashyam, Vijayaraghavan; Divita, Guy; Bennett, David B; Browne, Allen C; Taira, Ricky K
2007-01-01
The National Library of Medicine has developed a tool to identify medical concepts from the Unified Medical Language System in free text. This tool - MetaMap (and its java version MMTx) has been used extensively for biomedical text mining applications. We have developed a module for MetaMap which has a high performance in terms of processing speed. We evaluated our module independently against MetaMap for the task of identifying UMLS concepts in free text clinical radiology reports. A set of 1000 sentences from neuro-radiology reports were collected and processed using our technique and the MMTx Program. An evaluation showed that our technique was able to identify 91% of the concepts found by MMTx in 14% of the time taken by MMTx. An error analysis showed that the missing concepts were largely those which were not direct lexical matches but inferential matches of multiple concepts. Our method also identified multi-phrase concepts which MMTx failed to identify. We suggest that this module be implemented as an option in MMTx for real-time text mining applications where single concepts found in the UMLS need to be identified. PMID:17911776
Krishna Rajagopal
1999-08-15
I review recent theoretical developments which show how a key qualitative feature of the QCD phase diagram, namely a critical point which in a sense defines the landscape which heavy ion collision experiments are seeking to map, can be discovered. The map of the phase diagram which I sketch is based on reasonable inference from universality, lattice gauge theory and models; the discovery of the critical point would provide an experimental foundation for the central qualitative feature of the landscape. I also review recent progress in our understanding of cold, dense quark matter, as may occur in the cores of neutron stars. In this regime, quarks form Cooper pairs. The formation of such superconducting phases requires only weak attractive interactions, as provided by one-gluon exchange at asymptotically high density; these phases may nevertheless break chiral symmetry (by locking flavor symmetries to color symmetry) and may have excitations which are indistinguishable from those in a confined phase. Mapping this part of the phase diagram will require a better understanding of how the presence of color superconductivity and color-flavor locking affects neutron star phenomenology.
Causal diagrams in systems epidemiology
2012-01-01
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
Fat Voronoi Diagrams Gary L. Miller
Miller, Gary L.
Fat Voronoi Diagrams Gary L. Miller Todd Phillips Donald R. SheehyÂ§ 1 Why Fat Voronoi Diagrams fatness that captures many of the nice properties of the old definition without being sub- ject. In future work we hope to understand fat Voronoi diagrams well enough to design the next gen- eration
NASA Astrophysics Data System (ADS)
Pillsbury, Ralph T.
This research examined an instructional strategy called Diagramming the Never Ending Story: A method called diagramming was taught to sixth grade students via an outdoor science inquiry ecology unit. Students generated diagrams of the new ecology concepts they encountered, creating explanatory 'captions' for their newly drawn diagrams while connecting them in a memorable story. The diagramming process culminates in 20-30 meter-long murals called the Never Ending Story: Months of science instruction are constructed as pictorial scrolls, making sense of all new science concepts they encounter. This method was taught at a North Carolina "Public" Charter School, Children's Community School, to measure its efficacy in helping students comprehend scientific concepts and retain them thereby increasing science literacy. There were four demographically similar classes of 20 students each. Two 'treatment' classes, randomly chosen from the four classes, generated their own Never Ending Stories after being taught the diagramming method. A Solomon Four-Group Design was employed: Two Classes (one control, one treatment) were administered pre- and post; two classes received post tests only. The tests were comprised of multiple choice, fill-in and extended response (open-ended) sections. Multiple choice and fill-in test data were not statistically significant whereas extended response test data confirm that treatment classes made statistically significant gains.
ERIC Educational Resources Information Center
Underwood, Siobhan; Lumsden, Linda S.
1994-01-01
The items featured in this annotated bibliography touch on several aspects of the multifaceted class-size debate. Allen Odden reviews the literature and contends that class-size reduction should be used "sparingly and strategically." C. M. Achilles and colleagues examines two different class-size situations and find student test performance in the…
A JavaCC Parser for the UML-Based CDIF Transfer Format Patrick Pag Rudolf K. Keller Reinhard Schauer
Keller, Rudolf K.
is to provide automated support for the extraction of design models from source code, by stepwise, human analysis and clone detection, as well as for third-party tools. As the schema of our software repository] to reflect the UML 1.1 and our SPOOL-specific extensions due to our support of C++. In the following, we
Automated Knowledge Extraction from the UMLS Qing Zeng M.S., James J. Cimino, M.D.
Cimino, James J.
Automated Knowledge Extraction from the UMLS Qing Zeng M.S., James J. Cimino, M.D. Department of Medical Informatics Columbia University, New York, New York This paper presents our work in extracting system (DXplain) and our own knowledge base of medical terminology (MED) through automated processes
Origin and use of crystallization phase diagrams.
Rupp, Bernhard
2015-03-01
Crystallization phase diagrams are frequently used to conceptualize the phase relations and also the processes taking place during the crystallization of macromolecules. While a great deal of freedom is given in crystallization phase diagrams owing to a lack of specific knowledge about the actual phase boundaries and phase equilibria, crucial fundamental features of phase diagrams can be derived from thermodynamic first principles. Consequently, there are limits to what can be reasonably displayed in a phase diagram, and imagination may start to conflict with thermodynamic realities. Here, the commonly used `crystallization phase diagrams' are derived from thermodynamic excess properties and their limitations and appropriate use is discussed. PMID:25760697
Phase diagram of the frustrated two-leg ladder model
NASA Astrophysics Data System (ADS)
Hakobyan, T.; Hetherington, J. H.; Roger, M.
2001-04-01
Using density-matrix renormalization group calculations, we investigate the general phase diagram of the frustrated two-leg ladder with Heisenberg interactions along legs, rungs, and diagonals. We confirm that all antiferromagnetic gapped states belong to the same universality class as the Haldane phase. In a three-dimensional phase diagram, we determine a continuous surface with singularities in the string-order parameter or its first derivative, corresponding to a transition between two Haldane phases with different topological order. Some parts of this transition surface are critical with zero gap and vanishing string-order parameter. In the complementary parts, the transition is first order with finite gap and string order. The boundary of this surface with the ferromagnetic region is a critical end line, when the surface is critical, and a triple line anywhere else. Part of this boundary coincides with the exactly soluble model proposed by Dmitriev, Krivnov, and Ovchinnikov [Phys. Rev. B 56, 5985 (1997)].
Higher-order gravitational lensing reconstruction using Feynman diagrams
Jenkins, Elizabeth E.; Manohar, Aneesh V.; Yadav, Amit P.S.; Waalewijn, Wouter J. E-mail: amanohar@ucsd.edu E-mail: ayadav@physics.ucsd.edu
2014-09-01
We develop a method for calculating the correlation structure of the Cosmic Microwave Background (CMB) using Feynman diagrams, when the CMB has been modified by gravitational lensing, Faraday rotation, patchy reionization, or other distorting effects. This method is used to calculate the bias of the Hu-Okamoto quadratic estimator in reconstructing the lensing power spectrum up to O (?{sup 4}) in the lensing potential ?. We consider both the diagonal noise TT TT, EB EB, etc. and, for the first time, the off-diagonal noise TT TE, TB EB, etc. The previously noted large O (?{sup 4}) term in the second order noise is identified to come from a particular class of diagrams. It can be significantly reduced by a reorganization of the ? expansion. These improved estimators have almost no bias for the off-diagonal case involving only one B component of the CMB, such as EE EB.
Voronoi Diagrams Without Bounding Boxes
NASA Astrophysics Data System (ADS)
Sang, E. T. K.
2015-10-01
We present a technique for presenting geographic data in Voronoi diagrams without having to specify a bounding box. The method restricts Voronoi cells to points within a user-defined distance of the data points. The mathematical foundation of the approach is presented as well. The cell clipping method is particularly useful for presenting geographic data that is spread in an irregular way over a map, as for example the Dutch dialect data displayed in Figure 2. The automatic generation of reasonable cell boundaries also makes redundant a frequently used solution to this problem that requires data owners to specify region boundaries, as in Goebl (2010) and Nerbonne et al (2011).
Phase diagram of Janus Particles
Francesco Sciortino; Achille Giacometti; Giorgio Pastore
2009-11-16
We deeply investigate a simple model representative of the recently synthesized Janus particles, i.e. colloidal spherical particles whose surface is divided into two areas of different chemical composition. When the two surfaces are solvophilic and solvophobic, these particles constitute the simplest example of surfactants. The phase diagram includes a colloidal-poor (gas) colloidal-rich (liquid) de-mixing region, which is progressively suppressed by the insurgence of micelles, providing the first model where micellization and phase-separation are simultaneously observed. The coexistence curve is found to be negatively sloped in the temperature-pressure plane, suggesting that Janus particles can provide a colloidal system with anomalous thermodynamic behavior.
NASA Astrophysics Data System (ADS)
Risaliti, Guido; Lusso, Elisabeta
2015-09-01
We present a new method to test the cosmological model at high z, and measure the cosmological parameters, based on the non-linear correlation between UV and X-ray luminosity in quasars. While the method can be successfully tested with the data available today, a deep X-ray survey matching the future LSST and Euclid quasar catalogs is needed to achieve a high precision. Athena could provide a Hubble diagram for quasar analogous to that available today for supernovae, but extending up to z>6.
6d SCFTs, 5d Dualities and Tao Web Diagrams
Hirotaka Hayashi; Sung-Soo Kim; Kimyeong Lee; Futoshi Yagi
2015-09-10
We propose 5d descriptions of 6d ${\\cal N}=(1,0)$ superconformal field theories arising from Type IIA brane configurations with an $O8^-$-plane. We T-dualize the brane diagram along a compactification circle and obtain a 5-brane web diagram with two $O7^-$-planes. The gauge theory description of the resulting 5d theory for a given 6d superconformal field theory is not unique, and we argue that the non-uniqueness leads to various dual 5d gauge theories. There are three sources which lead to the 5d dualities. One type comes from either resolving both or one of the two $O7^-$-planes. The two situations give us two different ways to read off a 5d gauge theory from essentially the same web diagram. The second type originates from different distributions of D5 or D7-branes, shifting the gauge group ranks of the 5d quiver theory. The last one comes from the 90 or 45 degree rotations of the 5-brane web diagram, which is a part of the $SL(2,\\mathbb{Z})$ duality of Type IIB string theory, leading to completely different group structure. These lead to a very rich class of dualities between 5d gauge theories whose UV completion is the same 6d superconformal field theory. We also explore Higgsing of the 6d theories and their 5d counterparts. Decoupling the same flavors from the dual 5d theories gives rise to another dual 5d theories whose UV completion is the same 5d superconformal field theory. Finally we propose the 6d description of 5d theories which is obtained by a generalization of 5d $T_N$ theories with additional flavors, which turns out not to be in the class of Type IIA brane construction generically.
Hellrich, Johannes; Hahn, Udo
2014-01-01
We here report on efforts to computationally support the maintenance and extension of multilingual biomedical terminology resources. Our main idea is to treat term acquisition as a classification problem guided by term alignment in parallel multilingual corpora, using termhood information coming from of a named entity recognition system as a novel feature. We report on experiments for Spanish, French, German and Dutch parts of a multilingual UMLS-derived biomedical terminology. These efforts yielded 19k, 18k, 23k and 12k new terms and synonyms, respectively, from which about half relate to concepts without a previously available term label for these non-English languages. Based on expert assessment of a novel German terminology sample, 80% of the newly acquired terms were judged as reasonable additions to the terminology. PMID:25954371
Automatic acquisition of synonyms from French UMLS for enhanced search of EHRs.
Grabar, Natalia; Varoutas, Paul-Christophe; Rizand, Philippe; Livartowski, Alain; Hamon, Thierry
2008-01-01
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
Toward a Bio-Medical Thesaurus: Building the Foundation of the UMLS
Tuttle, Mark S.; Blois, Marsden S.; Erlbaum, Mark S.; Nelson, Stuart J.; Sherertz, David D.
1988-01-01
The Unified Medical Language System (UMLS) is being designed to provide a uniform user interface to heterogeneous machine-readable bio-medical information resources, such as bibliographic databases, genetic databases, expert systems and patient records.1 Such an interface will have to recognize different ways of saying the same thing, and provide links to ways of saying related things. One way to represent the necessary associations is via a domain thesaurus. As no such thesaurus exists, and because, once built, it will be both sizable and in need of continuous maintenance, its design should include a methodology for building and maintaining it. We propose a methodology, utilizing lexically expanded schema inversion, and a design, called T. Lex, which together form one approach to the problem of defining and building a bio-medical thesaurus. We argue that the semantic locality implicit in such a thesaurus will support model-based reasoning in bio-medicine.2
Multiple representations and free-body diagrams: Do students benefit from using them?
NASA Astrophysics Data System (ADS)
Rosengrant, David R.
2007-12-01
Introductory physics students have difficulties understanding concepts and solving problems. When they solve problems, they use surface features of the problems to find an equation to calculate a numerical answer often not understanding the physics in the problem. How do we help students approach problem solving in an expert manner? A possible answer is to help them learn to represent knowledge in multiple ways and then use these different representations for conceptual understanding and problem solving. This solution follows from research in cognitive science and in physics education. However, there are no studies in physics that investigate whether students who learn to use multiple representations are in fact better problem solvers. This study focuses on one specific representation used in physics--a free body diagram. A free-body diagram is a graphical representation of forces exerted on an object of interest by other objects. I used the free-body diagram to investigate five main questions: (1) If students are in a course where they consistently use free body diagrams to construct and test concepts in mechanics, electricity and magnetism and to solve problems in class and in homework, will they draw free-body diagrams on their own when solving exam problems? (2) Are students who use free-body diagrams to solve problems more successful then those who do not? (3) Why do students draw free-body diagrams when solving problems? (4) Are students consistent in constructing diagrams for different concepts in physics and are they consistent in the quality of their diagrams? (5) What are possible relationships between features of a problem and how likely a student will draw a free body diagram to help them solve the problem? I utilized a mixed-methods approach to answer these questions. Questions 1, 2, 4 and 5 required a quantitative approach while question 3 required a qualitative approach, a case study. When I completed my study, I found that if students are in an environment which fosters the use of representations for problem solving and for concept development, then the majority of students will consistently construct helpful free-body diagrams and use them on their own to solve problems. Additionally, those that construct correct free-body diagrams are significantly more likely to successfully solve the problem. Finally, those students that are high achieving tend to use diagrams more and for more reasons then students who have low course grades. These findings will have major impacts on how introductory physics instructors run their classes and how curriculums are designed. These results favor a problem solving strategy that is rich with representations.
Community detection by graph Voronoi diagrams
NASA Astrophysics Data System (ADS)
Deritei, Dávid; Lázár, Zsolt I.; Papp, István; Járai-Szabó, Ferenc; Sumi, Róbert; Varga, Levente; Ravasz Regan, Erzsébet; Ercsey-Ravasz, Mária
2014-06-01
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.
Magnetized effective QCD phase diagram
NASA Astrophysics Data System (ADS)
Ayala, Alejandro; Dominguez, C. A.; Hernández, L. A.; Loewe, M.; Zamora, R.
2015-11-01
The QCD phase diagram in the temperature vs quark chemical potential plane is studied in the presence of a magnetic field, using the linear sigma model coupled to quarks. It is shown that the decrease of the couplings with increasing field strength obtained in this model leads to the critical temperature for the phase transition to decrease with increasing field intensity (inverse magnetic catalysis). This happens provided that plasma screening is properly accounted for. It is also found that with increasing field strength the location of the critical end point in the phase diagram moves toward lower values of the critical quark chemical potential and larger values of the critical temperature. In addition, the critical end point approaches the temperature axis for large values of the magnetic field. We argue that a similar behavior is to be expected in QCD, since the physical impact of the magnetic field, regardless of strength, is to produce a spatial dimension reduction, whereby virtual quark-antiquark pairs are closer on average and thus the strength of their interaction decreases due to asymptotic freedom.
Feynman diagrams and their algebraic lattices
Michael Borinsky; Dirk Kreimer
2015-12-16
We present the lattice structure of Feynman diagram renormalization in physical QFTs from the viewpoint of Dyson-Schwinger-Equations and the core Hopf algebra of Feynman diagrams. The lattice structure encapsules the nestedness of diagrams. This structure can be used to give explicit expressions for the counterterms in zero-dimensional QFTs using the lattice-Moebius function. Different applications for the tadpole-free quotient, in which all appearing elements correspond to semimodular lattices, are discussed.
Feynman diagrams and their algebraic lattices
Borinsky, Michael
2015-01-01
We present the lattice structure of Feynman diagram renormalization in physical QFTs from the viewpoint of Dyson-Schwinger-Equations and the core Hopf algebra of Feynman diagrams. The lattice structure encapsules the nestedness of diagrams. This structure can be used to give explicit expressions for the counterterms in zero-dimensional QFTs using the lattice-Moebius function. Different applications for the tadpole-free quotient, in which all appearing elements correspond to semimodular lattices, are discussed.
Satake diagrams of affine Kac Moody algebras
NASA Astrophysics Data System (ADS)
Tripathy, L. K.; Pati, K. C.
2006-02-01
Satake diagrams of affine Kac-Moody algebras (untwisted and twisted) are obtained from their Dynkin diagrams. These diagrams give a classification of restricted root systems associated with these algebras. In the case of simple Lie algebras, these root systems and Satake diagrams correspond to symmetric spaces which have recently found many physical applications in quantum integrable systems, quantum transport problems, random matrix theories etc. We hope these types of root systems may have similar applications in theoretical physics in future and may correspond to symmetric spaces analogue of affine Kac-Moody algebras if they exist.
Variable stars across the observational HR diagram
Laurent Eyer; Nami Mowlavi
2007-12-21
An overview of pulsating variable stars across the observational Hertzprung-Russel (HR) diagram is presented, together with a summary of their global properties. The HR diagram is presented with a third colour-coded dimension, visualizing the fraction of variable, the amplitude of variability or the period of variability. The distribution of variable stars in the other observational diagrams, such as the Period-Amplitude diagram, is also presented. Some of the progresses performed in the field of variable stars during the last decade are briefly summarized, and future projects that will improve our knowledge of variable stars are mentioned.
Hofstadter Butterfly Diagram in Noncommutative Space
Hidenori Takahashi; Masanori Yamanaka
2006-06-23
We study an energy spectrum of electron moving under the constant magnetic field in two dimensional noncommutative space. It take place with the gauge invariant way. The Hofstadter butterfly diagram of the noncommutative space is calculated in terms of the lattice model which is derived by the Bopp's shift for space and by the Peierls substitution for external magnetic field. We also find the fractal structure in new diagram. Although the global features of the new diagram are similar to the diagram of the commutative space, the detail structure is different from it.
Solving Limited Memory Influence Diagrams
Mauá, Denis Deratani; Zaffalon, Marco
2011-01-01
We present a new algorithm for exactly solving decision making problems represented as influence diagrams. We do not require the usual assumptions of no forgetting and regularity; this allows us to solve problems with simultaneous decisions and limited information. The algorithm is empirically shown to outperform a state-of-the-art algorithm on randomly generated problems of up to 150 variables and $10^{64}$ solutions. We show that the problem is NP-hard even if the underlying graph structure of the problem has small treewidth and the variables take on a bounded number of states, but that a fully polynomial time approximation scheme exists for these cases. Moreover, we show that the bound on the number of states is a necessary condition for any efficient approximation scheme.
Hubble's diagram and cosmic expansion
Kirshner, Robert P.
2004-01-01
Edwin Hubble's classic article on the expanding universe appeared in PNAS in 1929 [Hubble, E. P. (1929) Proc. Natl. Acad. Sci. USA 15, 168–173]. The chief result, that a galaxy's distance is proportional to its redshift, is so well known and so deeply embedded into the language of astronomy through the Hubble diagram, the Hubble constant, Hubble's Law, and the Hubble time, that the article itself is rarely referenced. Even though Hubble's distances have a large systematic error, Hubble's velocities come chiefly from Vesto Melvin Slipher, and the interpretation in terms of the de Sitter effect is out of the mainstream of modern cosmology, this article opened the way to investigation of the expanding, evolving, and accelerating universe that engages today's burgeoning field of cosmology. PMID:14695886
A Regime Diagram for Subduction
NASA Astrophysics Data System (ADS)
Stegman, D. R.; Farrington, R.; Capitanio, F. A.; Schellart, W. P.
2009-12-01
Regime diagrams and associated scaling relations have profoundly influenced our understanding of planetary dynamics. Previous regime diagrams characterized the regimes of stagnant-lid, small viscosity contrast, transitional, and no-convection for temperature-dependent (Moresi and Solomatov, 1995), and non-linear power law rheologies (Solomatov and Moresi, 1997) as well as stagnant-lid, sluggish-lid, and mobile-lid regimes once the finite strength of rock was considered (Moresi and Solomatov, 1998). Scalings derived from such models have been the cornerstone for parameterized models of thermal evolution of rocky planets and icy moons for the past decade. While such a theory can predict the tectonic state of a planetary body, it is still rather incomplete in regards to predicting tectonics. For example, the mobile-lid regime is unspecific as to how continuous lithospheric recycling should occur on a terrestrial planet. Towards this goal, Gerya et al., (2008) advanced a new regime diagram aiming to characterize when subduction would manifest itself as a one-sided or two-sided downwelling and either symmetric or asymmetric. Here, we present a regime diagram for the case of a single-sided, asymmetric type of subduction (most Earth-like type). Using a 3-D numerical model of a free subduction, we describe a total of 5 different styles of subduction that can possibly occur. Each style is distinguished by its upper mantle slab morphology resulting from the sinking kinematics. We provide movies to illustrate the different styles and their progressive time-evolution. In each regime, subduction is accommodated by a combination of plate advance and slab rollback, with associated motions of forward plate velocity and trench retreat, respectively. We demonstrate that the preferred subduction mode depends upon two essential controlling factors: 1) buoyancy of the downgoing plate and 2) strength of plate in resisting bending at the hinge. We propose that a variety of subduction regimes are generated primarily as a product of two mechanisms. The first mechanism is that of the competition between the weight of the slab and the strength of the plate, which can be understood in terms of the applied bending moment, and this competition results in a particular radius of curvature (for which we provide a simple scaling theory). The second mechanism is the interaction between the slab and the more viscous lower mantle, which produces each regime's distinct slab morphology. Thus, the emergence of five distinct styles of subduction is a direct consequence of the presence of the modest barrier to flow into the lower mantle. Although only 2 of these styles presently operate on Earth, the possibility exists that other modes may have been the predominant mode in the past. Based on these models, we propose that the lithosphere is the primary factor in describing key elements of the plate tectonics system over time, rather than the convecting mantle. We discuss the various factors that may have influenced secular changes in Earth's tectonic behavior, some of which may have interesting consequences for the geochemical evolution of the Earth.
Hubble's diagram and cosmic expansion.
Kirshner, Robert P
2004-01-01
Edwin Hubble's classic article on the expanding universe appeared in PNAS in 1929 [Hubble, E. P. (1929) Proc. Natl. Acad. Sci. USA 15, 168-173]. The chief result, that a galaxy's distance is proportional to its redshift, is so well known and so deeply embedded into the language of astronomy through the Hubble diagram, the Hubble constant, Hubble's Law, and the Hubble time, that the article itself is rarely referenced. Even though Hubble's distances have a large systematic error, Hubble's velocities come chiefly from Vesto Melvin Slipher, and the interpretation in terms of the de Sitter effect is out of the mainstream of modern cosmology, this article opened the way to investigation of the expanding, evolving, and accelerating universe that engages today's burgeoning field of cosmology. PMID:14695886
CS1 Assessment Using Memory Diagrams Mark A. Holliday and David Luginbuhl
Holliday, Mark A.
and Computer Science Western Carolina University Cullowhee, NC 28723 +1 (828) 227-3951 {holliday, drl executes. Though memory diagrams are a simple idea, by careful use of shape and placement, a number of key and Features - Classes and Objects K.3.2 [Computers and Education]: Computer and Information Science Education
MSE 3050, Phase Diagrams and Kinetics, Leonid Zhigilei Phase Transitions and Phase Diagrams
Zhigilei, Leonid V.
MSE 3050, Phase Diagrams and Kinetics, Leonid Zhigilei Phase Transitions and Phase Diagrams One equation Understanding phase diagrams for one-component systems Polymorphic phase transitions Driving force for a phase transition First order and second-order phase transitions Reading: 1.2 of Porter and Easterling
Taylor Expansion Diagrams: A Canonical Representation for
Kalla, Priyank
Taylor Expansion Diagrams: A Canonical Representation for Verification of Data Flow Designs Maciej--A Taylor Expansion Diagram (TED) is a compact, word-level, canonical representation for data flow Taylor series expansion that allows one to model word-level signals as algebraic symbols. This power
Chord Diagrams and Coxeter Links Eriko Hironaka
Chord Diagrams and Coxeter Links Eriko Hironaka April 23, 2003 Abstract This paper presents a construction of #12;bered links (K; #6;) out of chord diagrams L. Let be the incidence graph of L. Under; S). Lehmer's problem is solved for the monodromy of these Coxeter links. 1 1 Introduction A chord
Chord Diagrams and Coxeter Links Eriko Hironaka
Chord Diagrams and Coxeter Links Eriko Hironaka February 28, 2003 Abstract This paper presents a construction of #12;bered links (K; #6;) out of chord diagrams L. Let be the incidence graph of L. Under; S). Lehmer's problem is solved for the monodromy of these Coxeter links. 1 1 Introduction A chord
UPDATED GOODMAN DIAGRAMS FOR FIBERGLASS COMPOSITE MATERIALS
UPDATED GOODMAN DIAGRAMS FOR FIBERGLASS COMPOSITE MATERIALS USING THE DOE/MSU FATIGUE DATABASE for the fiberglass composite materials typically used in wind turbine blades are relatively sparse with material presented a detailed Goodman diagram for these fiberglass materials. Their formulation uses the MSU
Zone Diagrams: Existence, Uniqueness and Algorithmic Challenge
Matousek, Jiri
Zone Diagrams: Existence, Uniqueness and Algorithmic Challenge Tetsuo Asano # School of Information University Aramaki Aza Aoba, AobaÂku, Sendai 980Â8579 Japan Abstract A zone diagram is a new variation a nonempty complement, the neutral zone. The defining property is that each R i consists of all x # R 2
Formalizing Spider Diagrams Joseph (Yossi) Gil
Kent, University of
]. The Swiss mathemati- cian Leonhard Euler (1707-1783) introduced the notation we now call Euler circles (or- lar and intuitive Venn diagrams and Euler circles. The language design emphasized scalability Euler diagrams) [1] to illus- trate relations between sets. This notation uses the topo- logical
NorthTolman Hall, Basement Evacuation Diagram
Walker, Matthew P.
A Mech B50F B50C B50 A Mech NorthTolman Hall, Basement Evacuation Diagram You are here Fire alarm Fire S Education Psychology A AEXIT Loading dock G91 G89 Emergency EXIT Tolman Hall, Ground Floor Evacuation Evacuation Diagram First aid kit A South #12;Library Mezzanine 2219 2217 2215 2211 2205A 2205 2205 B 2201
DECISION DIAGRAMS AND PASS TRANSISTOR LOGIC SYNTHESIS
De Micheli, Giovanni
DECISION DIAGRAMS AND PASS TRANSISTOR LOGIC SYNTHESIS V. Bertacco S. Minato P. Verplaetse L. Benini by ARPA, under grant No. DABT63-95-C-0049. #12;Decision Diagrams and Pass Transistor Logic Synthesis V transistors and domino logic. The synthesis of these cells is based on BDD and ZBDD representations
Building Path Diagrams for Multilevel Models
ERIC Educational Resources Information Center
Curran, Patrick J.; Bauer, Daniel J.
2007-01-01
Multilevel models have come to play an increasingly important role in many areas of social science research. However, in contrast to other modeling strategies, there is currently no widely used approach for graphically diagramming multilevel models. Ideally, such diagrams would serve two functions: to provide a formal structure for deriving the…
THE QCD PHASE DIAGRAM AT FINITE DENSITY.
SCHMIDT, C.; FODOR, Z.; KATZ, S.
2005-07-25
We study the density of states method to explore the phase diagram of the chiral transition on the temperature and quark chemical potential plane. Four quark flavours are used in the analysis. Though the method is quite expensive small lattices show an indication for a triple-point connecting three different phases on the phase diagram.
Phase diagram of ammonium nitrate
Dunuwille, Mihindra; Yoo, Choong-Shik
2013-12-07
Ammonium Nitrate (AN) is a fertilizer, yet becomes an explosive upon a small addition of chemical impurities. The origin of enhanced chemical sensitivity in impure AN (or AN mixtures) is not well understood, posing significant safety issues in using AN even today. To remedy the situation, we have carried out an extensive study to investigate the phase stability of AN and its mixtures with hexane (ANFO–AN mixed with fuel oil) and Aluminum (Ammonal) at high pressures and temperatures, using diamond anvil cells (DAC) and micro-Raman spectroscopy. The results indicate that pure AN decomposes to N{sub 2}, N{sub 2}O, and H{sub 2}O at the onset of the melt, whereas the mixtures, ANFO and Ammonal, decompose at substantially lower temperatures. The present results also confirm the recently proposed phase IV-IV{sup ?} transition above 17 GPa and provide new constraints for the melting and phase diagram of AN to 40 GPa and 400°C.
Heterogeneous Proofs: Spider Diagrams meet Higher-Order Provers
Jamnik, Mateja
Heterogeneous Proofs: Spider Diagrams meet Higher-Order Provers Matej Urbas and Mateja Jamnik or spider diagrams. We provide a mechanisation of the theory of abstract spider diagrams and establish diagrammatic reasoning systems for example, spider diagrams [6] and constraint diagrams [3]. Consequently
A Web Terminology Server Using UMLS for the Description of Medical Procedures
Burgun, Anita; Denier, Patrick; Bodenreider, Olivier; Botti, Geneviève; Delamarre, Denis; Pouliquen, Bruno; Oberlin, Philippe; Lévéque, Jean M.; Lukacs, Bertrand; Kohler, François; Fieschi, Marius; Le Beux, Pierre
1997-01-01
Abstract The Model for Assistance in the Orientation of a User within Coding Systems (MAOUSSC) project has been designed to provide a representation for medical and surgical procedures that allows several applications to be developed from several viewpoints. It is based on a conceptual model, a controlled set of terms, and Web server development. The design includes the UMLS knowledge sources associated with additional knowledge about medico-surgical procedures. The model was implemented using a relational database. The authors developed a complete interface for the Web presentation, with the intermediary layer being written in PERL. The server has been used for the representation of medico-surgical procedures that occur in the discharge summaries of the national survey of hospital activities that is performed by the French Health Statistics Agency in order to produce inpatient profiles. The authors describe the current status of the MAOUSSC server and discuss their interest in using such a server to assist in the coordination of terminology tasks and in the sharing of controlled terminologies. PMID:9292841
Editing the UMLS Metathesaurus: Review and Enhancement of a Computed Knowledge Source
Sperzel, David; Erlbaum, Mark; Fuller, Lloyd; Sherertz, David; Olson, Nels; Schuyler, Peri; Hole, William; Savage, Allan; Passarelli, Philip; Tuttle, Mark
1990-01-01
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.
The amplituhedron from momentum twistor diagrams
NASA Astrophysics Data System (ADS)
Bai, Yuntao; He, Song
2015-02-01
We propose a new diagrammatic formulation of the all-loop scattering amplitudes/Wilson loops in planar = 4 SYM, dubbed the "momentum-twistor diagrams". These are on-shell-diagrams obtained by gluing trivalent black and white vertices in momentum twistor space, which, in the reduced diagram case, are known to be related to diagrams in the original twistor space. The new diagrams are manifestly Yangian invariant, and they naturally represent factorization and forward-limit contributions in the all-loop BCFW recursion relations in momentum twistor space, in a fashion that is completely different from those in momentum space. We show how to construct and evaluate momentum-twistor diagrams, and how to use them to obtain tree-level amplitudes and loop-level integrands; in particular the latter involve isolated bubble-structures for loop variables arising from forward limits, or the entangled removal of particles. From each diagram, the generalized "boundary measurement" directly gives the C, D matrices, thus a cell in the amplituhedron associated with the amplitude, and we expect that our diagrammatic representations of the amplitude provide triangulations of the amplituhedron. To demonstrate the computational power of the formalism, we give explicit results for general two-loop integrands, and the cells of the amplituhedron for two-loop MHV amplitudes.
Direction Neutral Language Transformation with Metamodels
Gogolla, Martin - Fachbereich 3
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
Architecture flow diagrams under teamwork reg sign
Nicinski, T.
1992-02-01
The Teamwork CASE tool allows Data Flow Diagrams (DFDs) to be maintained for structured analysis. Fermilab has extended teamwork under UNIX{trademark} to permit Hatley and Pirbhai Architecture Flow Diagrams (AFDs) to be associated with DFDs and subsequently maintained. This extension, called TWKAFD, allows a user to open an AFD, graphically edit it, and replace it into a TWKAFD maintained library. Other aspects of Hatley and Pirbhai's methodology are supported. This paper presents a quick tutorial on Architecture Diagrams. It then describes the user's view of TWKAFD, the experience incorporating it into teamwork, and the successes with using the Architecture Diagram methodology along with the shortcomings of using the teamwork/TWKAFD tool. 8 refs.
An Improved Mnemonic Diagram for Thermodynamic Relationships.
ERIC Educational Resources Information Center
Rodriguez, Joaquin; Brainard, Alan J.
1989-01-01
Considers pressure, volume, entropy, temperature, Helmholtz free energy, Gibbs free energy, enthalpy, and internal energy. Suggests the mnemonic diagram is for use with simple systems that are defined as macroscopically homogeneous, isotropic, uncharged, and chemically inert. (MVL)
Innovation through Visualisation Requirements Engineering Diagrams
Salustri, Filippo A.
of performance How can you ensure your new products are as good as they can be? 34 Planetary Gear System Losses Transmit Reaction Forces Withstand Internal Forces Planetary Gear System Which of these diagrams
Interfaces for creating quantitative conceptual diagrams
Stewart, Robin S. (Robin Scott)
2008-01-01
Modern chart-making, illustration, and mathematical tools poorly support the use of conceptual components in quantitative graphs such as Economics diagrams. The substantial time those tools require to achieve the desired ...
Some Geometric Aspects of the Ternary Diagram.
ERIC Educational Resources Information Center
Philip, G. M.; Watson, D. F.
1989-01-01
Uses the process of normalization in the Cartesian coordinate system which entails radial projection onto a transect to compare different compositions of minerals. Warns that the ternary diagram should not be used as a framework for calculations. (MVL)
Free energy diagrams for protein function.
Nussinov, Ruth; Tsai, Chung-Jung
2014-03-20
Simplified representations can be powerful. Two common examples are sequence logos and ribbon diagrams. Both have been extraordinarily successful in capturing complex static features of sequences and structures. Capturing function is challenging, since activation involves triggered dynamic shifts between ON and OFF states. Here, we show that simple funnel drawings can capture and usefully portray proteins by their cellular triggering mechanism. The funnel shape around the proteins' native states can describe mechanisms of upstream signal integration and downstream response. "Function diagrams" are important: they can combine diverse biochemical data to visually distinguish among activation (or recruitment) mechanisms and tag proteins in cellular networks, clarifying their mechanism at a glance. We create templates for function classification and suggest that they can extend signaling pathway maps. Of note, the diagrams describe free energy landscapes; thus, they can be quantified. We name our dynamic free-energy diagrams dFEDs. PMID:24508196
Revised Diagnostic Diagrams for Planetary Nebulae
H. Riesgo; J. A. López
2006-02-08
Diagnostic diagrams of electron density - excitation for a sample of 613 planetary nebulae are presented. The present extensive sample allows the definition of new statistical limits for the distribution of planetary nebulae in the log [Ha/[SII
Massive Feynman diagrams and inverse binomial sums
A. I. Davydychev; M. Yu. Kalmykov
2004-10-12
When calculating higher terms of the epsilon-expansion of massive Feynman diagrams, one needs to evaluate particular cases of multiple inverse binomial sums. These sums are related to the derivatives of certain hypergeometric functions with respect to their parameters. Exploring this connection and using it together with an approach based on generating functions, we analytically calculate a number of such infinite sums, for an arbitrary value of the argument which corresponds to an arbitrary value of the off-shell external momentum. In such a way, we find a number of new results for physically important Feynman diagrams. Considered examples include two-loop two- and three-point diagrams, as well as three-loop vacuum diagrams with two different masses. The results are presented in terms of generalized polylogarithmic functions. As a physical example, higher-order terms of the epsilon-expansion of the polarization function of the neutral gauge bosons are constructed.
Approximating Minimization Diagrams and Generalized Proximity Search
Har-Peled, Sariel
is a fundamental task used in numerous domains including machine learning, clustering, document retrieval with apex at (pi, 0)). Clearly the NN problem is to eval- uate the minimization diagram of the functions
Phase diagram to design passive nanostructures
Lee, Jeng Yi
2015-01-01
A phase diagram, defined by the amplitude square and phase of scattering coefficients for absorption cross-section in each individual channel, is introduced as a universal map on the electromagnetic properties for passive scatterers. General physical bounds are naturally revealed based on the intrinsic power conservation in a passive scattering system, entailing power competitions among scattering, absorption, and extinction. Exotic scattering and absorption phenomena, from resonant scattering, invisible cloaking, coherent perfect absorber, and subwavelength superscattering can all be illustrated in this phase diagram. With electrically small core-shell scatterers as an example, we demonstrate a systematic method to design field-controllable structures based on the allowed trajectories in the phase diagram. The proposed phase diagram not only provides a simple tool to design optical devices but also promotes a deep understanding on Mie's scattering theory.
Minimum Energy Diagrams for Multieffect Distillation Arrangements
Skogestad, Sigurd
Minimum Energy Diagrams for Multieffect Distillation Arrangements Hilde K. Engelien and Sigurd distillation arrangements for separating a ternary mixture have been considered. The focus is on a heat-integrated complex distillation configuration, called a multieffect prefractionator arrangement. The comparison
Communicating Phylogeny: Evolutionary Tree Diagrams in Museums
MacDonald, Teresa; Wiley, Edward O.
2012-01-01
Tree of life diagrams are graphic representations of phylogeny—the evolutionary history and relationships of lineages—and as such these graphics have the potential to convey key evolutionary ideas and principles to a variety ...
NASA Astrophysics Data System (ADS)
Risaliti, G.; Lusso, E.
2015-12-01
We present a new method to test the ?CDM cosmological model and to estimate cosmological parameters based on the nonlinear relation between the ultraviolet and X-ray luminosities of quasars. We built a data set of 1138 quasars by merging several samples from the literature with X-ray measurements at 2 keV and SDSS photometry, which was used to estimate the extinction-corrected 2500 Å flux. We obtained three main results: (1) we checked the nonlinear relation between X-ray and UV luminosities in small redshift bins up to z? 6, confirming that the relation holds at all redshifts with the same slope; (2) we built a Hubble diagram for quasars up to z? 6, which is well matched to that of supernovae in the common z = 0–1.4 redshift interval and extends the test of the cosmological model up to z? 6; and (3) we showed that this nonlinear relation is a powerful tool for estimating cosmological parameters. Using the present data and assuming a ?CDM model, we obtain {{{? }}}M = 0.22{}-0.08+0.10 and {{{? }}}{{? }} = 0.92{}-0.30+0.18 ({{{? }}}M = 0.28 ± 0.04 and {{{? }}}{{? }} = 0.73 +/- 0.08 from a joint quasar-SNe fit). Much more precise measurements will be achieved with future surveys. A few thousand SDSS quasars already have serendipitous X-ray observations from Chandra or XMM-Newton, and at least 100,000 quasars with UV and X-ray data will be made available by the extended ROentgen Survey with an Imaging Telescope Array all-sky survey in a few years. The Euclid, Large Synoptic Survey Telescope, and Advanced Telescope for High ENergy Astrophysics surveys will further increase the sample size to at least several hundred thousand. Our simulations show that these samples will provide tight constraints on the cosmological parameters and will allow us to test for possible deviations from the standard model with higher precision than is possible today.
Penrose Diagram for a Transient Black Hole
James Lindesay; Paul Sheldon
2010-06-18
A Penrose diagram is constructed for a spatially coherent black hole that smoothly begins an accretion, then excretes symmetrically as measured by a distant observer, with the initial and final states described by a metric of Minkowski form. Coordinate curves on the diagram are computationally derived. Causal relationships between space-time regions are briefly discussed. The life cycle of the black hole demonstrably leaves asymptotic observers in an unaltered Minkowski space-time of uniform conformal scale.
A universal structured-design diagramer
NASA Technical Reports Server (NTRS)
1981-01-01
Program (FLOWCHARTER) generates standardized flowcharts and concordances for development and debugging of programs in any language. User describes programming-language grammar, providing syntax rules in Backus-Naur form (BNF), list of semantic rules, and set of concordance rules. Once grammar is described, user supplies only source code of program to be diagrammed. FLOWCHARTER automatically produces flow diagram and concordance. Source code for program is written for PASCAL Release 2 compiler, as distributed by University of Minnesota.
An analysis of Newton's projectile diagram
NASA Astrophysics Data System (ADS)
Topper, D.; Vincent, D. E.
1999-01-01
Newton's famous mountain projectile diagram, reproduced in countless science books, is analysed in detail - mathematically, graphically, and historically - perhaps for the first time. A study of the relationship between this diagram from Newton's On the System of the World and the written texts on projectile motion in this book and in the Principia reveals an ambiguity in Newton's presentation. We propose an explanation of the ambiguity based on an exploration of its roots in Newton's thought.
Fluctuations and the QCD phase diagram
Schaefer, B.-J.
2012-06-15
In this contribution the role of quantum fluctuations for the QCD phase diagram is discussed. This concerns in particular the importance of the matter back-reaction to the gluonic sector. The impact of these fluctuations on the location of the confinement/deconfinement and the chiral transition lines as well as their interrelation are investigated. Consequences of our findings for the size of a possible quarkyonic phase and location of a critical endpoint in the phase diagram are drawn.
Preliminary Study of Impulse-Momentum Diagrams
NASA Astrophysics Data System (ADS)
Rosengrant, David; Mzoughi, Taha
2008-10-01
In this paper we present a new representation to help students learn about momentum, impulse and conservation of momentum which we call an Impulse-Momentum Diagram. We include a description of this diagram as well as examples of how instructors can use them in the classroom. Next we present preliminary quantitative and qualitative data of a study we conducted where students used these representations. Our final analysis shows how students benefited from these representations.
Pressure-enthalpy diagrams for alternative refrigerants
Chen, J.; Kruse, H.
1996-10-01
Thermodynamic diagrams, particularly log(p)-h diagrams, have become very convenient tools for refrigeration and air-conditioning industries. To promote alternative refrigerants-related development and application, it is urgently required to provide the industries with reliable engineering diagrams for the most promising candidate refrigerants. A computer program has been developed for automatically producing log(p)-h diagrams for alternative refrigerants. The Lee Kesler Ploecker (LKP) equation of state has been used to calculate thermodynamic data. Some modifications have been made to the LKP to improve the calculation convergency. In this paper three sample diagrams for R134a, a binary R410A and a ternary R407B which have been enclosed and analyzed. To investigate the LKP calculation accuracy details, an extensive deviation analysis has been made for R134a. For mixed refrigerants, good calculation accuracy was achieved by optimizing the binary interactive parameters. The system can produce log(p)-h diagrams with reliable accuracy, high quality, and flexibility to meet any size and color requirements.
Expanding the Extent of a UMLS Semantic Type via Group Neighborhood Auditing
Chen, Yan; Gu, Huanying; Perl, Yehoshua; Halper, Michael; Xu, Junchuan
2009-01-01
Objective Each Unified Medical Language System (UMLS) concept is assigned one or more semantic types (ST). A dynamic methodology for aiding an auditor in finding concepts that are missing the assignment of a given ST, S is presented. Design The first part of the methodology exploits the previously introduced Refined Semantic Network and accompanying refined semantic types (RST) to help narrow the search space for offending concepts. The auditing is focused in a neighborhood surrounding the extent of an RST, T (of S) called an envelope, consisting of parents and children of concepts in the extent. The audit moves outward as long as missing assignments are discovered. In the second part, concepts not reached previously are processed and reassigned T as needed during the processing of S's other RSTs. The set of such concepts is expanded in a similar way to that in the first part. Measurements The number of errors discovered is reported. To measure the methodology's efficiency, “error hit rates” (i.e., errors found in concepts examined) are computed. Results The methodology was applied to three STs: Experimental Model of Disease (EMD), Environmental Effect of Humans, and Governmental or Regulatory Activity. The EMD experienced the most drastic change. For its RST “EMD ? Neoplastic Process” (RST “EMD”) with only 33 (31) original concepts, 915 (134) concepts were found by the first (second) part to be missing the EMD assignment. Changes to the other two STs were smaller. Conclusion The results show that the proposed auditing methodology can help to effectively and efficiently identify concepts lacking the assignment of a particular semantic type. PMID:19567802
Robinson, Judas; de Lusignan, Simon; Kostkova, Patty; Madge, Bruce
2006-01-01
The Metathesaurus of the Unified Medical Language System (UMLS) offers the possibility of mapping between various medical vocabularies. The Primary Care Electronic Library (PCEL) contains a database of over six thousand Medical Subject Headings (MeSH terms) describing the resources of the electronic library. We were interested to know if it was possible to map from MeSH to the Systemized Nomenclature of Medicine Clinical Terms (SNOMED CT). Such a mapping would aid healthcare professionals to retrieve relevant data from our digital library as it would enable links between clinical systems and indexed material. PMID:17095807
Shock dynamics of phase diagrams
Moro, Antonio
2014-04-15
A thermodynamic phase transition denotes a drastic change of state of a physical system due to a continuous change of thermodynamic variables, as for instance pressure and temperature. The classical van der Waals equation of state is the simplest model that predicts the occurrence of a critical point associated with the gas–liquid phase transition. Nevertheless, below the critical temperature theoretical predictions of the van der Waals theory significantly depart from the observed physical behaviour. We develop a novel approach to classical thermodynamics based on the solution of Maxwell relations for a generalised family of nonlocal entropy functions. This theory provides an exact mathematical description of discontinuities of the order parameter within the phase transition region, it explains the universal form of the equations of state and the occurrence of triple points in terms of the dynamics of nonlinear shock wave fronts. -- Highlights: •A new generalisation of van der Waals equation of state. •Description of phase transitions in terms of shock dynamics of state curves. •Proof of the universality of equations of state for a general class of models. •Interpretation of triple points as confluence of classical shock waves. •Correspondence table between thermodynamics and nonlinear conservation laws.
Berger, Adam C.; Winter, Kathryn; Hoffman, John P.; Regine, William F.; Abrams, Ross A.; Safran, Howard; Benson, Alan B.; MacDonald, John; Willett, Christopher G.
2012-11-01
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).
NASA Astrophysics Data System (ADS)
White, M. Catherine
Typical 101 courses discourage many students from pursuing higher level science and math courses. Introductory classes in science and math serve largely as a filter, screening out all but the most promising students, and leaving the majority of college graduates—including most prospective teachers—with little understanding of how science works, according to a study conducted for the National Science Foundation. Because few teachers, particularly at the elementary level, experience any collegiate science teaching that stresses skills of inquiry and investigation, they simply never learn to use those methods in their teaching, the report states.
Particle diagrams and statistics of many-body random potentials
NASA Astrophysics Data System (ADS)
Small, Rupert A.; Müller, Sebastian
2015-05-01
We present a method using Feynman-like diagrams to calculate the statistical properties of random many-body potentials. This method provides a promising alternative to existing techniques typically applied to this class of problems, such as the method of supersymmetry and the eigenvector expansion technique pioneered in Benet et al. (2001). We use it here to calculate the fourth, sixth and eighth moments of the average level density for systems with m bosons or fermions that interact through a random k-body Hermitian potential (k ? m); the ensemble of such potentials with a Gaussian weight is known as the embedded Gaussian Unitary Ensemble (eGUE) (Mon and French, 1975). Our results apply in the limit where the number l of available single-particle states is taken to infinity. A key advantage of the method is that it provides an efficient way to identify only those expressions which will stay relevant in this limit. It also provides a general argument for why these terms have to be the same for bosons and fermions. The moments are obtained as sums over ratios of binomial expressions, with a transition from moments associated to a semi-circular level density for m < 2 k to Gaussian moments in the dilute limit k ? m ? l. Regarding the form of this transition, we see that as m is increased, more and more diagrams become relevant, with new contributions starting from each of the points m = 2 k , 3 k , … , nk for the 2 nth moment.
Layout Metrics for Euler Diagrams Jean Flower1
Kent, University of
the choice of weightings for a useful combination of the metrics. Keywords: Euler diagrams, graph drawing that some diagrams become invalid because they have "disconnected zones". An atomic Euler diagram has for smoothing atomic Euler diagrams, although the principles of the aesthetics and metrics work equally for non-atomic
Science Visual Literacy: Learners' Perceptions and Knowledge of Diagrams
ERIC Educational Resources Information Center
McTigue, Erin M.; Flowers, Amanda C.
2011-01-01
Constructing meaning from science texts relies not only on comprehending the words but also the diagrams and other graphics. The goal of this study was to explore elementary students' perceptions of science diagrams and their skills related to diagram interpretation. 30 students, ranging from second grade through middle school, completed a diagram…
49 CFR 1152.10 - System diagram map.
Code of Federal Regulations, 2010 CFR
2010-10-01
...2010-10-01 false System diagram map. 1152.10 Section 1152.10 Transportation...Diagram § 1152.10 System diagram map. (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...
Fragments of Spider Diagrams of Order and their Relative Expressiveness
Kent, University of
Fragments of Spider Diagrams of Order and their Relative Expressiveness Aidan Delaney1 , Gem of Euler diagrams to be investigated. We consider the expressiveness of spider diagrams of order (SDoO), which extend spider diagrams by including syntax that provides ordering information between elements
Evolution of HR Diagrams So as a cluster ages, the
Barnes, Joshua Edward
Evolution of HR Diagrams So as a cluster ages, the main sequence `burns down' in order. lifetime Diagram to Determine the Age of a Star Cluster #12;Evolution of HR Diagrams So as a cluster ages, the main of plotting stars, we represent them with a line of constant age. Using the H-R Diagram to Determine the Age
Computation of Voronoi Diagrams and Delaunay Triangulation via Parametric Linear
Cambridge, University of
Computation of Voronoi Diagrams and Delaunay Triangulation via Parametric Linear Programming Sasa V triangulation or the Voronoi Diagram of an arbitrary set of points S in Rn . 1 Introduction It is the purpose], Voronoi diagrams and De- launay triangulations. Voronoi diagrams, Dirichlet tesselations and Delaunay
Fishbone Diagrams: Organize Reading Content with a "Bare Bones" Strategy
ERIC Educational Resources Information Center
Clary, Renee; Wandersee, James
2010-01-01
Fishbone diagrams, also known as Ishikawa diagrams or cause-and-effect diagrams, are one of the many problem-solving tools created by Dr. Kaoru Ishikawa, a University of Tokyo professor. Part of the brilliance of Ishikawa's idea resides in the simplicity and practicality of the diagram's basic model--a fish's skeleton. This article describes how…
On phase diagrams of magnetic reconnection
Cassak, P. A.; Drake, J. F.
2013-06-15
Recently, “phase diagrams” of magnetic reconnection were developed to graphically organize the present knowledge of what type, or phase, of reconnection is dominant in systems with given characteristic plasma parameters. Here, a number of considerations that require caution in using the diagrams are pointed out. First, two known properties of reconnection are omitted from the diagrams: the history dependence of reconnection and the absence of reconnection for small Lundquist number. Second, the phase diagrams mask a number of features. For one, the predicted transition to Hall reconnection should be thought of as an upper bound on the Lundquist number, and it may happen for considerably smaller values. Second, reconnection is never “slow,” it is always “fast” in the sense that the normalized reconnection rate is always at least 0.01. This has important implications for reconnection onset models. Finally, the definition of the relevant Lundquist number is nuanced and may differ greatly from the value based on characteristic scales. These considerations are important for applications of the phase diagrams. This is demonstrated by example for solar flares, where it is argued that it is unlikely that collisional reconnection can occur in the corona.
ERIC Educational Resources Information Center
Poch, Apryl L.; van Garderen, Delinda; Scheuermann, Amy M.
2015-01-01
A visual representation, such as a diagram, can be a powerful strategy for solving mathematical word problems. However, using a representation to solve mathematical word problems is not as simple as it seems! Many students with learning disabilities struggle to use a diagram effectively and efficiently. This article provides a framework for…
2. Oracle Designer I: ER-Diagrams 2-1 Part 2: ER-Diagrams
Brass, Stefan
2. Oracle Designer I: ER-Diagrams 2-1 Part 2: ER-Diagrams in Oracle Designer References: Â· Barker. Â· Koletzke/Dorsey: Oracle Designer Handbook, 2nd Edition. ORACLE Press, 1998, ISBN 0-07-882417-6, ca. $40. Â· A. Lulushi: Inside Oracle Designer/2000. Prentice Hall, 1998, ISBN 0-13-849753-2, ca. $50. Â· Oracle
Galaxy emission line classification using three-dimensional line ratio diagrams
Vogt, Frédéric P. A.; Dopita, Michael A.; Kewley, Lisa J.; Sutherland, Ralph S.; Scharwächter, Julia; Basurah, Hassan M.; Ali, Alaa; Amer, Morsi A.
2014-10-01
Two-dimensional (2D) line ratio diagnostic diagrams have become a key tool in understanding the excitation mechanisms of galaxies. The curves used to separate the different regions—H II-like or excited by an active galactic nucleus (AGN)—have been refined over time but the core technique has not evolved significantly. However, the classification of galaxies based on their emission line ratios really is a multi-dimensional problem. Here we exploit recent software developments to explore the potential of three-dimensional (3D) line ratio diagnostic diagrams. We introduce the ZQE diagrams, which are a specific set of 3D diagrams that separate the oxygen abundance and the ionization parameter of H II region-like spectra and also enable us to probe the excitation mechanism of the gas. By examining these new 3D spaces interactively, we define the ZE diagnostics, a new set of 2D diagnostics that can provide the metallicity of objects excited by hot young stars and that cleanly separate H II region-like objects from the different classes of AGNs. We show that these ZE diagnostics are consistent with the key log [N II]/H? versus log [O III]/H? diagnostic currently used by the community. They also have the advantage of attaching a probability that a given object belongs to one class or the other. Finally, we discuss briefly why ZQE diagrams can provide a new way to differentiate and study the different classes of AGNs in anticipation of a dedicated follow-up study.
NASA Astrophysics Data System (ADS)
Quebedeaux, James Edward
The focus of this study was to identify major conceptual difficulties that selected public high school physical science students encounter in understanding a standard electromagnetic spectrum diagram. A research-driven, modified version of that standard diagram was used in this study to determine the value added to student understanding of electromagnetic waves. A content analysis was performed on electromagnetic spectrum diagrams found in US textbooks from the 1950s through the present. A class of public high school physical science students participated in a study consisting of four activities conducted during a three-week unit. Students were given a pre- and post-achievement test and a pre- and post-survey on the regions of the electromagnetic spectrum. At the conclusion of each activity, selected students were interviewed and each co-constructed a concept map with the researcher. The Electromagnetic Spectrum Literacy Rubric (ESLR) was designed and used to assess students' conceptual understanding periodically as they proceeded through the unit study. A mixed methods analysis was performed, employing both qualitative and quantitative data. A paired t-test determined that there was a statistically significant difference (p = 0.014) between the pre- and post-achievement test scores for the class of students participating in the unit study. Effect sizes also determined that students have difficulties with mathematical calculations and wave properties. These topics present conceptual challenges which must be overcome to understand and use an electromagnetic spectrum diagram effectively.
David P. Feldman; Carl S. McTague; James P. Crutchfield
2008-06-29
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.
Microwave window breakdown experiments and simulations on the UM/L-3 relativistic magnetron.
Hoff, B W; Mardahl, P J; Gilgenbach, R M; Haworth, M D; French, D M; Lau, Y Y; Franzi, M
2009-09-01
Experiments have been performed on the UM/L-3 (6-vane, L-band) relativistic magnetron to test a new microwave window configuration designed to limit vacuum side breakdown. In the baseline case, acrylic microwave windows were mounted between three of the waveguide coupling cavities in the anode block vacuum housing and the output waveguides. Each of the six 3 cm deep coupling cavities is separated from its corresponding anode cavity by a 1.75 cm wide aperture. In the baseline case, vacuum side window breakdown was observed to initiate at single waveguide output powers close to 20 MW. In the new window configuration, three Air Force Research Laboratory-designed, vacuum-rated directional coupler waveguide segments were mounted between the coupling cavities and the microwave windows. The inclusion of the vacuum side power couplers moved the microwave windows an additional 30 cm away from the anode apertures. Additionally, the Lucite microwave windows were replaced with polycarbonate windows and the microwave window mounts were redesigned to better maintain waveguide continuity in the region around the microwave windows. No vacuum side window breakdown was observed in the new window configuration at single waveguide output powers of 120+MW (a factor of 3 increase in measured microwave pulse duration and factor of 3 increase in measured peak power over the baseline case). Simulations were performed to investigate likely causes for the window breakdown in the original configuration. Results from these simulations have shown that in the original configuration, at typical operating voltage and magnetic field ranges, electrons emitted from the anode block microwave apertures strike the windows with a mean kinetic energy of 33 keV with a standard deviation of 14 keV. Calculations performed using electron impact angle and energy data predict a first generation secondary electron yield of 65% of the primary electron population. The effects of the primary aperture electron impacts, combined with multiplication of the secondary populations, were determined to be the likely causes of the poor microwave window performance in the original configuration. PMID:19791954
Calculations of penguin diagrams in B decays
Cai-Dian Lu; Da-Xin Zhang
1997-04-07
We analyze the effects of the space-like penguin diagrams in two body B decays $B^-\\to K^-{\\bar K}^0$ and $B^-\\to \\pi^-{\\bar K}^0$. Special attention is paid to the operator $Q_6$, whose contribution is large in the BSW model, but vanishes in the PQCD method in the approximation of neglecting the masses in the final states. Suppressions of the space-like penguin diagrams are found in the PQCD method, which implies that the contributions of the space-like penguins are small compared to those of the time-like penguins.
Phase diagram of the hard-core Yukawa fluid within the integral equation method.
El Mendoub, E B; Wax, J-F; Jakse, N
2006-11-01
In this study, the integral equation method proposed recently by Sarkisov [J. Chem. Phys. 114, 9496 (2001).], which has proved accurate for continuous potentials, is extended successfully to the hard sphere potential plus an attractive Yukawa tail. By comparing the results of thermodynamic properties, including the liquid-vapor phase diagram, with available simulation data, it is found that this method remains reliable for this class of models of interaction often used in colloid science. PMID:17279956
Massachusetts at Lowell, University of
a student of the : Day Undergraduate or Continuing Studies & Corporate Education Degree Program at the time & enrolled in an undergraduate degree program at UML and left before receiving a bachelor's degree and have you attend other institution(s)? No Yes Associate Degree Yes No If Yes please list: If you received
Massachusetts at Lowell, University of
a student of the : Day Undergraduate or Continuing Studies & Corporate Education Degree Program at the time & enrolled in an undergraduate degree program at UML and left before receiving a bachelor's degree and have(s)? No Yes Associate Degree Yes No If Yes please list: #12;Page 2 6/26/2015 If you received an Associate
Cimino, James J.
) and terminologies (conceptual) makes similar mappings more complicated. The Unified Medical Language System (UMLS processor to concepts in the Medical Entities Dictionary (MED) terminology. METHODS A total of 3,436 Med, Donald P. Harrington M.D., James J. Cimino M.D. Department of Medical Informatics, Columbia University
Drawing conformal diagrams for a fractal landscape
Winitzki, Sergei
2005-06-15
Generic models of cosmological inflation and the recently proposed scenarios of a recycling universe and the string theory landscape predict spacetimes whose global geometry is a stochastic, self-similar fractal. To visualize the complicated causal structure of such a universe, one usually draws a conformal (Carter-Penrose) diagram. I develop a new method for drawing conformal diagrams, applicable to arbitrary 1+1-dimensional spacetimes. This method is based on a qualitative analysis of intersecting lightrays and thus avoids the need for explicit transformations of the spacetime metric. To demonstrate the power and simplicity of this method, I present derivations of diagrams for spacetimes of varying complication. I then apply the lightray method to three different models of an eternally inflating universe (scalar-field inflation, recycling universe, and string theory landscape) involving the nucleation of nested asymptotically flat, de Sitter and/or anti-de Sitter bubbles. I show that the resulting diagrams contain a characteristic fractal arrangement of lines.
Fog Machines, Vapors, and Phase Diagrams
ERIC Educational Resources Information Center
Vitz, Ed
2008-01-01
A series of demonstrations is described that elucidate the operation of commercial fog machines by using common laboratory equipment and supplies. The formation of fogs, or "mixing clouds", is discussed in terms of the phase diagram for water and other chemical principles. The demonstrations can be adapted for presentation suitable for elementary…
Construction of Lax operators from weight diagrams
Carbon, S.L.; Piard, E.J.
1991-05-01
We show that cyclic weight diagrams corresponding to representations of affine Lie algebras allow one to read-off the associated Lax operator. The resultant Lax pair generates the modified KdV equations, and have been shown in some cases to produce acceptable solutions of the string equation of matrix models.
Weight diagram construction of Lax operators
Carbon, S.L.; Piard, E.J.
1991-10-01
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.
Complexities of One-Component Phase Diagrams
ERIC Educational Resources Information Center
Ciccioli, Andrea; Glasser, Leslie
2011-01-01
For most materials, the solid at and near the triple-point temperature is denser than the liquid with which it is in equilibrium. However, for water and certain other materials, the densities of the phases are reversed, with the solid being less dense. The profound consequences for the appearance of the "pVT" diagram of one-component materials…
The Binary Temperature-Composition Phase Diagram
ERIC Educational Resources Information Center
Sanders, Philip C.; Reeves, James H.; Messina, Michael
2006-01-01
The equations for the liquid and gas lines in the binary temperature-composition phase diagram are derived by approximating that delta(H)[subscript vap] of the two liquids are equal. It is shown that within this approximation, the resulting equations are not too difficult to present in an undergraduate physical chemistry lecture.
Constructing Causal Diagrams to Learn Deliberation
ERIC Educational Resources Information Center
Easterday, Matthew W.; Aleven, Vincent; Scheines, Richard; Carver, Sharon M.
2009-01-01
Policy problems like "What should we do about global warming?" are ill-defined in large part because we do not agree on a system to represent them the way we agree Algebra problems should be represented by equations. As a first step toward building a policy deliberation tutor, we investigated: (a) whether causal diagrams help students learn to…
Penguin diagrams for the HYP staggered fermions
Keunsu Choi; Weonjong Lee
2003-10-22
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.
Brislawn, K.; Brown, D.; Chesshire, G.; Henshaw, W.
1997-01-01
Overture is a library containing classes for grids, overlapping grid generation and the discretization and solution of PDEs on overlapping grids. This document describes the Overture grid classes, including classes for single grids and classes for collections of grids.
A Simple Approach for Boundary Improvement of Euler Diagrams.
Simonetto, Paolo; Archambault, Daniel; Scheidegger, Carlos
2016-01-01
General methods for drawing Euler diagrams tend to generate irregular polygons. Yet, empirical evidence indicates that smoother contours make these diagrams easier to read. In this paper, we present a simple method to smooth the boundaries of any Euler diagram drawing. When refining the diagram, the method must ensure that set elements remain inside their appropriate boundaries and that no region is removed or created in the diagram. Our approach uses a force system that improves the diagram while at the same time ensuring its topological structure does not change. We demonstrate the effectiveness of the approach through case studies and quantitative evaluations. PMID:26529723
Colored HOMFLY polynomials of knots presented as double fat diagrams
NASA Astrophysics Data System (ADS)
Mironov, A.; Morozov, A.; Morozov, An.; Ramadevi, P.; Singh, Vivek Kumar
2015-07-01
Many knots and links in S 3 can be drawn as gluing of three manifolds with one or more four-punctured S 2 boundaries. We call these knot diagrams as double fat graphs whose invariants involve only the knowledge of the fusion and the braiding matrices of four -strand braids. Incorporating the properties of four-point conformal blocks in WZNW models, we conjecture colored HOMFLY polynomials for these double fat graphs where the color can be rectangular or non-rectangular representation. With the recent work of Gu-Jockers, the fusion matrices for the non-rectangular [21] representation, the first which involves multiplicity is known. We verify our conjecture by comparing with the [21] colored HOMFLY of many knots, obtained as closure of three braids. The conjectured form is computationally very effective leading to writing [21]-colored HOMFLY polynomials for many pretzel type knots and non-pretzel type knots. In particular, we find class of pretzel mutants which are distinguished and another class of mutants which cannot be distinguished by [21] representation. The difference between the [21]-colored HOMFLY of two mutants seems to have a general form, with A-dependence completely defined by the old conjecture due to Morton and Cromwell. In particular, we check it for an entire multi-parametric family of mutant knots evaluated using evolution method.
Colored HOMFLY polynomials of knots presented as double fat diagrams
Mironov, A; Morozov, An; Ramadevi, P; Singh, Vivek Kumar
2015-01-01
Many knots and links in S^3 can be drawn as gluing of three manifolds with one or more four-punctured S^2 boundaries. We call these knot diagrams as double fat graphs whose invariants involve only the knowledge of the fusion and the braiding matrices of four-strand braids. Incorporating the properties of four-point conformal blocks in WZNW models, we conjecture colored HOMFLY polynomials for these double fat graphs where the color can be rectangular or non-rectangular representation. With the recent work of Gu-Jockers, the fusion matrices for the non-rectangular [21] representation, the first which involves multiplicity is known. We verify our conjecture by comparing with the [21] colored HOMFLY of many knots, obtained as closure of three braids. The conjectured form is computationally very effective leading to writing [21]-colored HOMFLY polynomials for many pretzel type knots and non-pretzel type knots. In particular, we find class of pretzel mutants which are distinguished and another class of mutants whic...
Colored HOMFLY polynomials of knots presented as double fat diagrams
A. Mironov; A. Morozov; An. Morozov; P. Ramadevi; Vivek Kumar Singh
2015-07-12
Many knots and links in S^3 can be drawn as gluing of three manifolds with one or more four-punctured S^2 boundaries. We call these knot diagrams as double fat graphs whose invariants involve only the knowledge of the fusion and the braiding matrices of four-strand braids. Incorporating the properties of four-point conformal blocks in WZNW models, we conjecture colored HOMFLY polynomials for these double fat graphs where the color can be rectangular or non-rectangular representation. With the recent work of Gu-Jockers, the fusion matrices for the non-rectangular [21] representation, the first which involves multiplicity is known. We verify our conjecture by comparing with the [21] colored HOMFLY of many knots, obtained as closure of three braids. The conjectured form is computationally very effective leading to writing [21]-colored HOMFLY polynomials for many pretzel type knots and non-pretzel type knots. In particular, we find class of pretzel mutants which are distinguished and another class of mutants which cannot be distinguished by [21] representation. The difference between the [21]-colored HOMFLY of two mutants seems to have a general form, with A-dependence completely defined by the old conjecture due to Morton and Cromwell. In particular, we check it for an entire multi-parametric family of mutant knots evaluated using evolution method.
Mariusz Tarnopolski
2013-06-13
This paper presents bifurcation and generalized bifurcation diagrams for a rotational model of an oblate satellite. Special attention is paid to parameter values describing one of Saturn's moons, Hyperion. For various oblateness the largest Lyapunov Characteristic Exponent (LCE) is plotted. The largest LCE in the initial condition as well as in the mixed parameter-initial condition space exhibits a fractal structure, for which the fractal dimension was calculated. It results from the bifurcation diagrams of which most of the parameter values for preselected initial conditions lead to chaotic rotation. The First Recurrence Time (FRT) diagram provides an explanation of the birth of chaos and the existence of quasi-periodic windows occuring in the bifurcation diagrams.
Special Tips for Notetaking in the Sciences: Before class
Snider, Barry B.
Special Tips for Notetaking in the Sciences: Before class: Printing out Powerpoint slides in advance is helpful when there are complex diagrams that are hard to recreate yourself. Be sure to do and recorded transcripts of lectures. "Advanced" Tips: Have a consistent system of how you label
75 FR 61512 - Outer Continental Shelf Official Protraction Diagrams
Federal Register 2010, 2011, 2012, 2013, 2014
2010-10-05
... Bureau of Ocean Energy Management, Regulation and Enforcement Outer Continental Shelf Official... Outer Continental Shelf Official Protraction Diagrams (OPDs) located within Atlantic Ocean areas, with... informational purposes only. Outer Continental Shelf Official Protraction Diagrams in the North Atlantic,...
Greek Mathematical Diagrams: Their Use and Their Meaning.
ERIC Educational Resources Information Center
Netz, Reviel
1998-01-01
Introduces a project that explores the role of diagrams in mathematical signification. Discusses the central role of diagrams in deductive mathematics at its very inception in Greek mathematical writings. (ASK)
Proof test diagrams for Zerodur glass-ceramic
NASA Technical Reports Server (NTRS)
Tucker, D. S.
1991-01-01
Proof test diagrams for Zerodur glass-ceramics are calculated from available fracture mechanics data. It is shown that the environment has a large effect on minimum time-to-failure as predicted by proof test diagrams.
Phase Coexistence in a Dynamic Phase Diagram.
Gentile, Luigi; Coppola, Luigi; Balog, Sandor; Mortensen, Kell; Ranieri, Giuseppe A; Olsson, Ulf
2015-08-01
Metastability and phase coexistence are important concepts in colloidal science. Typically, the phase diagram of colloidal systems is considered at the equilibrium without the presence of an external field. However, several studies have reported phase transition under mechanical deformation. The reason behind phase coexistence under shear flow is not fully understood. Here, multilamellar vesicle (MLV)-to-sponge (L3 ) and MLV-to-L? transitions upon increasing temperature are detected using flow small-angle neutron scattering techniques. Coexistence of L? and MLV phases at 40?°C under shear flow is detected by using flow NMR spectroscopy. The unusual rheological behavior observed by studying the lamellar phase of a non-ionic surfactant is explained using (2) H NMR and diffusion flow NMR spectroscopy with the coexistence of planar lamellar-multilamellar vesicles. Moreover, a dynamic phase diagram over a wide range of temperatures is proposed. PMID:26083451
The geometry of on-shell diagrams
NASA Astrophysics Data System (ADS)
Franco, Sebastián; Galloni, Daniele; Mariotti, Alberto
2014-08-01
The fundamental role of on-shell diagrams in quantum field theory has been recently recognized. On-shell diagrams, or equivalently bipartite graphs, provide a natural bridge connecting gauge theory to powerful mathematical structures such as the Grassmannian. We perform a detailed investigation of the combinatorial and geometric objects associated to these graphs. We mainly focus on their relation to polytopes and toric geometry, the Grassmannian and its stratification. Our work extends the current understanding of these connections along several important fronts, most notably eliminating restrictions imposed by planarity, positivity, reducibility and edge removability. We illustrate our ideas with several explicit examples and introduce concrete methods that considerably simplify computations. We consider it highly likely that the structures unveiled in this article will arise in the on-shell study of scattering amplitudes beyond the planar limit. Our results can be conversely regarded as an expansion in the understanding of the Grassmannian in terms of bipartite graphs.
Penguin diagrams for improved staggered fermions
Weonjong Lee
2005-01-13
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.
Penguin diagrams for improved staggered fermions
Lee, Weonjong
2005-01-01
We calculate, at the one-loop level, penguin diagrams for improved staggered fermion operators constructed using various fat links. The main result is that diagonal mixing coefficients with penguin operators are identical between the unimproved operators and the improved operators using such fat links as Fat7, Fat7+Lepage, Fat7, HYP (I) and HYP (II). In addition, it turns out that the off-diagonal mixing vanishes for those constructed using fat links of Fat7, Fat7 and HYP (II). This is a consequence of the fact that the improvement by various fat links changes only the mixing with higher dimension operators and off-diagonal operators. The results of this paper, combined with those for current-current diagrams, provide complete matching at the one-loop level with all corrections of O(g{sup 2}) included.
Massive basketball diagram for a thermal scalar field theory
NASA Astrophysics Data System (ADS)
Andersen, Jens O.; Braaten, Eric; Strickland, Michael
2000-08-01
The ``basketball diagram'' is a three-loop vacuum diagram for a scalar field theory that cannot be expressed in terms of one-loop diagrams. We calculate this diagram for a massive scalar field at nonzero temperature, reducing it to expressions involving three-dimensional integrals that can be easily evaluated numerically. We use this result to calculate the free energy for a massive scalar field with a ?4 interaction to three-loop order.
Argand Diagrams and the Polar Form
Vickers, James
complex numbers in polar form #12;1. The Argand Diagram In Section 10.1 we met a complex number z = x + iy-directions respectively. So, using vector addition: p + q = (a + c)i + (b + d)j p q p + q x y vector addition w z z + w coordinates (a, b). z r P 0 x y b a To locate the point
Pore formation phase diagrams for lipid membranes
NASA Astrophysics Data System (ADS)
Mukhin, S. I.; Kheyfets, B. B.
2014-05-01
Critical lateral pressure for a pore formation and phase diagram of porous membrane are derived analytically as functions of the microscopic parameters of the lipid chains. The derivation exploits path-integral calculation of the free energy of the ensembles of semi-flexible strings and rigid rods that mimic the hydrophobic tails of lipids in the lipid bilayers and bolalipid membranes respectively. Analytical expressions for the area stretch/compressibility moduli of the membranes are derived in both models.
From Hubble diagrams to scale factors
Thomas Schucker; Andre Tilquin
2005-06-20
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.
The Critical Importance of Russell's Diagram
NASA Astrophysics Data System (ADS)
Gingerich, O.
2013-04-01
The idea of dwarf and giants stars, but not the nomenclature, was first established by Eijnar Hertzsprung in 1905; his first diagrams in support appeared in 1911. In 1913 Henry Norris Russell could demonstrate the effect far more strikingly because he measured the parallaxes of many stars at Cambridge, and could plot absolute magnitude against spectral type for many points. The general concept of dwarf and giant stars was essential in the galactic structure work of Harlow Shapley, Russell's first graduate student. In order to calibrate the period-luminosity relation of Cepheid variables, he was obliged to fall back on statistical parallax using only 11 Cepheids, a very sparse sample. Here the insight provided by the Russell diagram became critical. The presence of yellow K giant stars in globular clusters credentialed his calibration of the period-luminosity relation by showing that the calibrated luminosity of the Cepheids was comparable to the luminosity of the K giants. It is well known that in 1920 Shapley did not believe in the cosmological distances of Heber Curtis' spiral nebulae. It is not so well known that in 1920 Curtis' plot of the period-luminosity relation suggests that he didn't believe it was a physical relation and also he failed to appreciate the significance of the Russell diagram for understanding the large size of the Milky Way.
Random matrix models for phase diagrams
Benoit Vanderheyden; A D Jackson
2011-10-04
We describe a random matrix approach that can provide generic and readily soluble mean-field descriptions of the phase diagram for a variety of systems ranging from QCD to high-T_c materials. Instead of working from specific models, phase diagrams are constructed by averaging over the ensemble of theories that possesses the relevant symmetries of the problem. Although approximate in nature, this approach has a number of advantages. First, it can be useful in distinguishing generic features from model-dependent details. Second, it can help in understanding the `minimal' number of symmetry constraints required to reproduce specific phase structures. Third, the robustness of predictions can be checked with respect to variations in the detailed description of the interactions. Finally, near critical points, random matrix models bear strong similarities to Ginsburg-Landau theories with the advantage of additional constraints inherited from the symmetries of the underlying interaction. These constraints can be helpful in ruling out certain topologies in the phase diagram. In this Key Issue, we illustrate the basic structure of random matrix models, discuss their strengths and weaknesses, and consider the kinds of system to which they can be applied.
Refined phase diagram of boron nitride
Solozhenko, V.; Turkevich, V.Z.; Holzapfel, W.B.
1999-04-15
The equilibrium phase diagram of boron nitride thermodynamically calculated by Solozhenko in 1988 has been now refined on the basis of new experimental data on BN melting and extrapolation of heat capacities of BN polymorphs into high-temperature region using the adapted pseudo-Debye model. As compared with the above diagram, the hBN {l_reversible} cBN equilibrium line is displaced by 60 K toward higher temperatures. The hBN-cBN-L triple point has been calculated to be at 3480 {+-} 10 K and 5.9 {+-} 0.1 GPa, while the hBN-L-V triple point is at T = 3400 {+-} 20 K and p = 400 {+-} 20 Pa, which indicates that the region of thermodynamic stability of vapor in the BN phase diagram is extremely small. It has been found that the slope of the cBN melting curve is positive whereas the slope of hBN melting curve varies from positive between ambient pressure and 3.4 GPa to negative at higher pressures.
The Problem of Labels in E-Assessment of Diagrams
ERIC Educational Resources Information Center
Jayal, Ambikesh; Shepperd, Martin
2009-01-01
In this article we explore a problematic aspect of automated assessment of diagrams. Diagrams have partial and sometimes inconsistent semantics. Typically much of the meaning of a diagram resides in the labels; however, the choice of labeling is largely unrestricted. This means a correct solution may utilize differing yet semantically equivalent…
Density-Enthalpy Phase Diagram 0D Boiler Simulation
Vuik, Kees
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
AIAA-2005-0196 OPTIMIZED GOODMAN DIAGRAM FOR THE
AIAA-2005-0196 OPTIMIZED GOODMAN DIAGRAM FOR THE ANALYSIS OF FIBERGLASS COMPOSITES USED IN WIND Goodman diagram for a fiberglass composite that is a typical wind turbine blade material presented an updated Goodman diagram for a fiberglass composite that is a typical wind turbine blade
Oak Ridge National Laboratory Technology Logic Diagram. Executive Summary
Not Available
1993-06-30
This executive summary contains a description of the logic diagram format; some examples from the diagram (Vol. 2) and associated technology evaluation data sheets (Vol. 3); a complete (albeit condensed) listing of the RA, D&D, and WM problems at ORNL; and a complete listing of the technology rankings for all the areas covered by the diagram.
30 CFR 256.8 - Leasing maps and diagrams.
Code of Federal Regulations, 2010 CFR
2010-07-01
...2010-07-01 2010-07-01 false Leasing maps and diagrams. 256.8 Section 256...Management, General § 256.8 Leasing maps and diagrams. (a) Any area... (b) The MMS shall prepare leasing maps and official protraction diagrams of...
The Classroom as Rhizome: New Strategies for Diagramming Knotted Interactions
ERIC Educational Resources Information Center
de Freitas, Elizabeth
2012-01-01
This article calls attention to the unexamined role of diagrams in educational research and offers examples of alternative diagramming practices or tools that shed light on classroom interaction as a rhizomatic process. Drawing extensively on the work of Latour, Deleuze and Guattari, and Chatelet, this article explores the power of diagramming as…
Reasoning with Spider Diagrams John Howse, Fernando Molina, John Taylor
Kent, University of
Reasoning with Spider Diagrams John Howse, Fernando Molina, John Taylor School of Computing Computing Laboratory University of Kent, Canterbury, UK S.J.H.Kent@ukc.ac.uk Abstract Spider diagrams such as the Unified Modelling Language. This paper summarises the main syntax and semantics of spider diagrams
MAGNETIC FIELDS IN THE HR DIAGRAM Jeffrey L. Linsky
Linsky, Jeffrey L.
MAGNETIC FIELDS IN THE HR DIAGRAM Jeffrey L. Linsky JILA/University of Colorado and NIST Solar. What are the consequences of this behavior in a dynamic atmosphere? 1 A Tour Through the HR Diagram of the HR Diagram. Questions to ask during our tour: ffl What direct or indirect techniques can measure
The HR Diagram of Globular Clusters: Theorist' view(s)
D'Antona, Francesca
The HR Diagram of Globular Clusters: Theorist' view(s) F. D'Antona Osservatorio Astronomico di Roma, Italy Abstract: I list the characteristic features of Globular Cluster (GC) HR diagrams which provide by looking at the composite HR diagram of the GC NGC 6397 shown in figure 1, and illustrated in figure 2
Students' Learning Activities While Studying Biological Process Diagrams
ERIC Educational Resources Information Center
Kragten, Marco; Admiraal, Wilfried; Rijlaarsdam, Gert
2015-01-01
Process diagrams describe how a system functions (e.g. photosynthesis) and are an important type of representation in Biology education. In the present study, we examined students' learning activities while studying process diagrams, related to their resulting comprehension of these diagrams. Each student completed three learning tasks. Verbal…
Automating the Layout of Network Diagrams with Specified Visual Organization
Shieber, Stuart
Automating the Layout of Network Diagrams with Specified Visual Organization Corey Kosak, Joe Marks was previously available under the title ``New Approaches to Automating NetworkDiagram Layout''. #12; #12; Automating the Layout of Network Diagrams with Specified Visual Organization Corey Kosak Joe Marks Stuart
S. Groote; J. G. Körner; A. A. Pivovarov
2000-04-05
We present a new method to investigate a class of diagrams which generalizes the sunset topology to any number of massive internal lines. Our attention is focused on the computation of the spectral density of these diagrams which is related to many-body phase space in $D$ dimensional space-time. The spectral density is determined by the inverse $K$-transform of the product of propagators in configuration space. The inverse $K$-transform reduces to the inverse Laplace transform in any odd number of space-time dimensions for which we present an explicit analytical result.
Bolli, G B; Riddle, M C; Bergenstal, R M; Ziemen, M; Sestakauskas, K; Goyeau, H; Home, P D
2015-01-01
Aims To compare the efficacy and safety of new insulin glargine 300?U/ml (Gla-300) with that of glargine 100?U/ml (Gla-100) in insulin-naïve people with type 2 diabetes using oral glucose-lowering drugs. Methods The EDITION 3 study was a multicentre, open-label, parallel-group study. Participants were randomized to Gla-300 or Gla-100 once daily for 6?months, discontinuing sulphonylureas and glinides, with a dose titration aimed at achieving pre-breakfast plasma glucose concentrations of 4.4–5.6?mmol/l (80–100?mg/dl). The primary endpoint was change in glycated haemoglobin (HbA1c) from baseline to month?6. The main secondary endpoint was percentage of participants with ?1 nocturnal confirmed [?3.9?mmol/l (?70?mg/dl)] or severe hypoglycaemia from week?9 to month?6. Other measures of glycaemia and hypoglycaemia, weight change and insulin dose were assessed. Results Randomized participants (n?=?878) had a mean (standard deviation) age of 57.7 (10.1)?years, diabetes duration 9.8 (6.4)?years, body mass index 33.0 (6.7)?kg/m2 and HbA1c 8.54 (1.06)?% [69.8 (11.6)?mmol/mol]. HbA1c levels decreased by equivalent amounts with the two treatments; the least squares mean difference in change from baseline was 0.04 [95% confidence interval (CI) ?0.09 to 0.17]?% or 0.4 (?1.0 to 1.9)?mmol/mol. Numerically fewer participants reported ?1 nocturnal confirmed (?3.9?mmol/l) or severe hypoglycaemia from week?9 to month?6 [relative risk (RR) 0.89 (95% CI 0.66 to 1.20)] with Gla-300 versus Gla-100; a significantly lower risk of hypoglycaemia with this definition was found over the 6-month treatment period [RR 0.76 (95% CI 0.59 to 0.99)]. No between-treatment differences in adverse events were identified. Conclusions Gla-300 is as effective as Gla-100 in reducing HbA1c in insulin-naïve people with type 2 diabetes, with lower hypoglycaemia risk. PMID:25641260
Ritzel, R; Roussel, R; Bolli, G B; Vinet, L; Brulle-Wohlhueter, C; Glezer, S; Yki-Järvinen, H
2015-01-01
Aims To conduct a patient-level meta-analysis of the EDITION 1, 2 and 3 studies, which compared the efficacy and safety of new insulin glargine 300 U/ml (Gla-300) with insulin glargine 100 U/ml (Gla-100) in people with type 2 diabetes (T2DM) on basal and mealtime insulin, basal insulin and oral antihyperglycaemic drugs, or no prior insulin, respectively. Methods The EDITION studies were multicentre, randomized, open-label, parallel-group, phase IIIa studies, with similar designs and endpoints. A patient-level meta-analysis of the studies enabled these endpoints to be examined over 6 months in a large population with T2DM (Gla-300, n = 1247; Gla-100, n = 1249). Results No significant study-by-treatment interactions across studies were found, enabling them to be pooled. The mean change in glycated haemoglobin was comparable for Gla-300 and Gla-100 [each ?1.02 (standard error 0.03)%; least squares (LS) mean difference 0.00 (95% confidence interval (CI) ?0.08 to 0.07)%]. Annualized rates of confirmed (?3.9 mmol/l) or severe hypoglycaemia were lower with Gla-300 than with Gla-100 during the night (31% difference in rate ratio over 6 months) and at any time (24 h, 14% difference). Consistent reductions were observed in percentage of participants with ?1 hypoglycaemic event. Severe hypoglycaemia at any time (24 h) was rare (Gla-300: 2.3%; Gla-100: 2.6%). Weight gain was low (<1 kg) in both groups, with less gain with Gla-300 [LS mean difference ?0.28 kg (95% CI ?0.55 to ?0.01); p = 0.039]. Both treatments were well tolerated, with similar rates of adverse events. Conclusion Gla-300 provides comparable glycaemic control to Gla-100 in a large population with a broad clinical spectrum of T2DM, with consistently less hypoglycaemia at any time of day and less nocturnal hypoglycaemia. PMID:25929311
Federal Register 2010, 2011, 2012, 2013, 2014
2011-10-13
...Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer Continental...Official Protraction Diagram (OPD), Lease Maps, and Supplemental Official OCS Block Diagrams...OCS Official Protraction Diagram, Lease Maps, and Supplemental Official OCS Shelf...
Failure Assessment Diagram for Titanium Brazed Joints
NASA Technical Reports Server (NTRS)
Flom, Yury; Jones, Justin S.; Powell, Mollie M.; Puckett, David F.
2011-01-01
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).
Open Orbits and Augmentations of Dynkin Diagrams
Fan, Sin Tsun Edward
2008-01-01
Given any representation V of a complex linear reductive Lie group G_0, we show that a larger semi-simple Lie group G with g=g_0 + V + V* + ..., exists precisely when V has a finite number of G_0-orbits. In particular, V admits an open G_0-orbit. Furthermore, this corresponds to an augmentation of the Dynkin diagram of g_0. The representation theory of g should be useful in describing the geometry of manifolds with stable forms as studied by Hitchin.
Isolated pulsar spin evolution on the diagram
NASA Astrophysics Data System (ADS)
Ridley, J. P.; Lorimer, D. R.
2010-05-01
We look at two contrasting spin-down models for isolated radio pulsars and, accounting for selection effects, synthesize observable populations. While our goal is to reproduce all of the observable characteristics, in this paper we pay particular attention to the form of the spin period versus period derivative () diagram and its dependence on various pulsar properties. We analyse the initial spin period, the braking index, the magnetic field, various beaming models as well as the pulsar's luminosity. In addition to considering the standard magnetic dipole model for pulsar spin-down, we also consider the recent hybrid model proposed by Contopoulos and Spitkovsky. The magnetic dipole model, however, does a better job of reproducing the observed pulsar population. We conclude that random alignment angles and period-dependent luminosity distributions are essential to reproduce the observed diagram. We also consider the time decay of alignment angles and attempt to reconcile various models currently being studied. We conclude that in order to account for recent evidence for the alignment found by Weltevrede and Johnston, the braking torque on a neutron star should not depend strongly on the inclination. Our simulation code is publicly available and includes a web-based interface to examine the results and make predictions for yields of current and future surveys.
Critical point analysis of phase envelope diagram
NASA Astrophysics Data System (ADS)
Soetikno, Darmadi; Kusdiantara, Rudy; Puspita, Dila; Sidarto, Kuntjoro A.; Siagian, Ucok W. R.; Soewono, Edy; Gunawan, Agus Y.
2014-03-01
Phase diagram or phase envelope is a relation between temperature and pressure that shows the condition of equilibria between the different phases of chemical compounds, mixture of compounds, and solutions. Phase diagram is an important issue in chemical thermodynamics and hydrocarbon reservoir. It is very useful for process simulation, hydrocarbon reactor design, and petroleum engineering studies. It is constructed from the bubble line, dew line, and critical point. Bubble line and dew line are composed of bubble points and dew points, respectively. Bubble point is the first point at which the gas is formed when a liquid is heated. Meanwhile, dew point is the first point where the liquid is formed when the gas is cooled. Critical point is the point where all of the properties of gases and liquids are equal, such as temperature, pressure, amount of substance, and others. Critical point is very useful in fuel processing and dissolution of certain chemicals. Here in this paper, we will show the critical point analytically. Then, it will be compared with numerical calculations of Peng-Robinson equation by using Newton-Raphson method. As case studies, several hydrocarbon mixtures are simulated using by Matlab.
The Critical Importance of Russell's Diagram
Gingerich, Owen
2013-01-01
The idea of dwarf and giants stars, but not the nomenclature, was first established by Eijnar Hertzsprung in 1905; his first diagrams in support appeared in 1911. In 1913 Henry Norris Russell could demonstrate the effect far more strikingly because he measured the parallaxes of many stars at Cambridge, and could plot absolute magnitude against spectral type for many points. The general concept of dwarf and giant stars was essential in the galactic structure work of Harlow Shapley, Russell's first graduate student. In order to calibrate the period-luminosity relation of Cepheid variables, he was obliged to fall back on statistical parallax using only 11 Cepheids, a very sparse sample. Here the insight provided by the Russell diagram became critical. The presence of yellow K giant stars in globular clusters credentialed his calibration of the period-luminosity relation by showing that the calibrated luminosity of the Cepheids was comparable to the luminosity of the K giants. It is well known that in 1920 Shaple...
Automated D/3 to Visio Analog Diagrams
Energy Science and Technology Software Center (ESTSC)
2000-08-10
ADVAD1 reads an ASCII file containing the D/3 DCS MDL input for analog points for a D/3 continuous database. It uses the information in the files to create a series of Visio files representing the structure of each analog chain, one drawing per Visio file. The actual drawing function is performed by Visio (requires Visio version 4.5+). The user can configure the program to select which fields in the database are shown on the diagrammore »and how the information is to be presented. This gives a visual representation of the structure of the analog chains, showing selected fields in a consistent manner. Updating documentation can be done easily and the automated approach eliminates human error in the cadding process. The program can also create the drawings far faster than a human operator is capable, able to create approximately 270 typical diagrams in about 8 minutes on a Pentium II 400 MHz PC. The program allows for multiple option sets to be saved to provide different settings (i.e., different fields, different field presentations, and /or different diagram layouts) for various scenarios or facilities on one workstation. Option sets may be exported from the Windows registry to allow duplication of settings on another workstation.« less
Critical point analysis of phase envelope diagram
Soetikno, Darmadi; Siagian, Ucok W. R.; Kusdiantara, Rudy Puspita, Dila Sidarto, Kuntjoro A. Soewono, Edy; Gunawan, Agus Y.
2014-03-24
Phase diagram or phase envelope is a relation between temperature and pressure that shows the condition of equilibria between the different phases of chemical compounds, mixture of compounds, and solutions. Phase diagram is an important issue in chemical thermodynamics and hydrocarbon reservoir. It is very useful for process simulation, hydrocarbon reactor design, and petroleum engineering studies. It is constructed from the bubble line, dew line, and critical point. Bubble line and dew line are composed of bubble points and dew points, respectively. Bubble point is the first point at which the gas is formed when a liquid is heated. Meanwhile, dew point is the first point where the liquid is formed when the gas is cooled. Critical point is the point where all of the properties of gases and liquids are equal, such as temperature, pressure, amount of substance, and others. Critical point is very useful in fuel processing and dissolution of certain chemicals. Here in this paper, we will show the critical point analytically. Then, it will be compared with numerical calculations of Peng-Robinson equation by using Newton-Raphson method. As case studies, several hydrocarbon mixtures are simulated using by Matlab.
Instability Regions in the Upper HR Diagram
NASA Technical Reports Server (NTRS)
deJager, Cornelis; Lobel, Alex; Nieuwenhuijzen, Hans; Stothers, Richard; Hansen, James E. (Technical Monitor)
2001-01-01
The following instability regions for blueward evolving supergiants are outlined and compared: (1) Areas in the Hertzsprung-Russell(HR) diagram where stars are dynamically unstable. (2) Areas where the effective acceleration in the upper part of the photospheres is negative, hence directed outward. (3) Areas where the sonic points of the stellar wind (Where wind velocity = sound velocity) are situated inside the photospheres, at a level deeper than tau(sub Ross) = 0.01. We compare the results with the positions of actual stars in the HR diagram and we find evidence that the recent strong contraction of the yellow hypergiant HR8752 was initiated in a period during which (g(sub eff)) is less than 0, whereupon the star became dynamically unstable. The instability and extreme shells around IRC+10420 are suggested to be related to three factors: (g(sub eff)) is less than 0; the sonic point is situated inside the photosphere; and the star is dynamically unstable.
Hints for families of gamma-ray bursts improving the Hubble diagram
NASA Astrophysics Data System (ADS)
Cardone, Vincenzo F.; Fraix-Burnet, Didier
2013-09-01
As soon as their extragalactic origins were established, the hope to make gamma-ray bursts (GRBs) standardizeable candles to probe the very high-z universe has opened the search for scaling relations between redshift-independent observable quantities and distance-dependent ones. Although some remarkable success has been achieved, the empirical correlations thus found are still affected by a significant intrinsic scatter which downgrades the precision in the inferred GRB Hubble diagram. We investigate here whether this scatter may come from fitting together objects belonging to intrinsically different classes. To this end, we rely on a cladistics analysis to partition GRBs in homogenous families according to their rest-frame properties. Although the poor statistics prevent us from drawing a definitive answer, we find that both the intrinsic scatter and the coefficients of the Epeak-Eiso and Epeak-L correlations significantly change depending on which sub-sample is fitted. It turns out that the fit to the full sample leads to a scaling relation which approximately follows the diagonal of the region delimited by the fits to each homogenous class. We therefore argue that a preliminary identification of the class a GRB belongs to is necessary in order to select the right scaling relation to be used in order to not bias the distance determination and hence the Hubble diagram.
VICTORIA UNIVERSITY OF WELLINGTON Te Whare Wananga o te Upoko o te Ika a Maui
(s) being auctioned. Everything for sale (e.g. furniture, CDs, books, etc) has a description items for sale at any given moment, although each can only be sold in one auction at a time. (b) [4] Draw a UML class diagram showing all the classes and their relationships that you would use
NASA Astrophysics Data System (ADS)
Jian, Yu-Cin; Wu, Chao-Jung
2015-02-01
We investigated strategies used by readers when reading a science article with a diagram and assessed whether semantic and spatial representations were constructed while reading the diagram. Seventy-one undergraduate participants read a scientific article while tracking their eye movements and then completed a reading comprehension test. Our results showed that the text-diagram referencing strategy was commonly used. However, some readers adopted other reading strategies, such as reading the diagram or text first. We found all readers who had referred to the diagram spent roughly the same amount of time reading and performed equally well. However, some participants who ignored the diagram performed more poorly on questions that tested understanding of basic facts. This result indicates that dual coding theory may be a possible theory to explain the phenomenon. Eye movement patterns indicated that at least some readers had extracted semantic information of the scientific terms when first looking at the diagram. Readers who read the scientific terms on the diagram first tended to spend less time looking at the same terms in the text, which they read after. Besides, presented clear diagrams can help readers process both semantic and spatial information, thereby facilitating an overall understanding of the article. In addition, although text-first and diagram-first readers spent similar total reading time on the text and diagram parts of the article, respectively, text-first readers had significantly less number of saccades of text and diagram than diagram-first readers. This result might be explained as text-directed reading.
Medical Reasoning with Rough-Set Influence Diagrams.
Huang, Chia-Hui
2015-08-01
There are several advantages to evaluating a problem using influence diagram operations. The analyst can use a representation that is natural to the decision maker, since the algorithm executes all of the inference and analysis automatically. The influence diagram solution procedure can also result in significant gains in efficiency. Conditional independence is clearly exhibited in the diagram, so the size of intermediate calculations can be reduced, resulting in considerable reductions in both processing time and memory requirements. However, when imprecise knowledge from data sets is involved in the systems, how to reason from approximate information becomes a main issue in evaluating influence diagrams effectively. This study develops an alternative knowledge model, rough-set influence diagrams (RSID), which combine rough-set decision rules and graphical structures of influence diagrams in medical settings. The proposed RSID provides a comprehensive schema for knowledge representation and decision support. PMID:25871487
Domain-Specific Languages and Diagram Customization for a Concurrent Engineering Environment
NASA Technical Reports Server (NTRS)
Cole, Bjorn; Dubos, Greg; Banazadeh, Payam; Reh, Jonathan; Case, Kelley; Wang, Yeou-Fang; Jones, Susan; Picha, Frank
2013-01-01
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 several 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.
Domain-specific languages and diagram customization for a concurrent engineering environment
NASA Astrophysics Data System (ADS)
Cole, B.; Dubos, G.; Banazadeh, P.; Reh, J.; Case, K.; Wang, Y.; Jones, S.; Picha, F.
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.
Massive basketball diagram for a thermal scalar field theory
Andersen, Jens O.; Braaten, Eric; Strickland, Michael
2000-08-15
The ''basketball diagram'' is a three-loop vacuum diagram for a scalar field theory that cannot be expressed in terms of one-loop diagrams. We calculate this diagram for a massive scalar field at nonzero temperature, reducing it to expressions involving three-dimensional integrals that can be easily evaluated numerically. We use this result to calculate the free energy for a massive scalar field with a {phi}{sup 4} interaction to three-loop order. (c) 2000 The American Physical Society.
Conformal and projection diagrams in LaTeX
Christa R. Ölz; Sebastian J. Szybka
2013-05-09
In general relativity, the causal structure of space-time may sometimes be depicted by conformal Carter-Penrose diagrams or a recent extension of these - the projection diagrams. The introduction of conformal diagrams in the sixties was one of the progenitors of the golden age of relativity. They are the key ingredient of many scientific papers. Unfortunately, drawing them in the form suitable for LaTeX documents is time-consuming and not easy. We present below a library that allows one to draw an arbitrary conformal diagram in a few simple steps.
GEL FORMATION: PHASE DIAGRAMS USING TABLETOP RHEOLOGY AND CALORIMETRY
Raghavan, Srinivasa
Chapter 8 GEL FORMATION: PHASE DIAGRAMS USING TABLETOP RHEOLOGY AND CALORIMETRY Srinivasa R: In particular, differential scanning calorimetry (DSC). We will now consider these two techniques systematically
55. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ...
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
54. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ...
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
53. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ...
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
Basic primitives for molecular diagram sketching
2010-01-01
A collection of primitive operations for molecular diagram sketching has been developed. These primitives compose a concise set of operations which can be used to construct publication-quality 2 D coordinates for molecular structures using a bare minimum of input bandwidth. The input requirements for each primitive consist of a small number of discrete choices, which means that these primitives can be used to form the basis of a user interface which does not require an accurate pointing device. This is particularly relevant to software designed for contemporary mobile platforms. The reduction of input bandwidth is accomplished by using algorithmic methods for anticipating probable geometries during the sketching process, and by intelligent use of template grafting. The algorithms and their uses are described in detail. PMID:20923555
Improving perturbation theory with cactus diagrams
Constantinou, M; Skouroupathis, A; Constantinou, Martha; Panagopoulos, Haralambos; Skouroupathis, Apostolos
2006-01-01
We study a systematic improvement of perturbation theory for gauge fields on the lattice [hep-lat/0606001]; the improvement entails resumming, to all orders in the coupling constant, a dominant subclass of tadpole diagrams. This method, originally proposed for the Wilson gluon action, is extended here to encompass all possible gluon actions made of closed Wilson loops; any fermion action can be employed as well. The effect of resummation is to replace various parameters in the action (coupling constant, Symanzik and clover coefficient) by ``dressed'' values; the latter are solutions to certain coupled integral equations, which are easy to solve numerically. Some positive features of this method are: a) It is gauge invariant, b) it can be systematically applied to improve (to all orders) results obtained at any given order in perturbation theory, c) it does indeed absorb in the dressed parameters the bulk of tadpole contributions. Two different applications are presented: The additive renormalization of fermio...
The Phase Diagram of Superionic Ice
NASA Astrophysics Data System (ADS)
Sun, Jiming; Clark, Bryan; Car, Roberto
2014-03-01
Using the variable cell Car-Parrinello molecular dynamics method, we study the phase diagram of superionic ice from 200GPa to 2.5TPa. We present evidence that at very high pressure the FCC structure of the oxygen sublattice may become unstable allowing for a new superionic ice phase, in which the oxygen sublattice takes the P21 structure found in zero-temperature total energy calculations. We also report on how the melting temperature of the hydrogen sublattice is affected by this new crystalline structure of the oxygen sublattice. This work was supported by the NSF under grant DMS-1065894(J.S. and R.C.) and PHY11-25915(B.C.).
Phase diagram of water in carbon nanotubes.
Takaiwa, Daisuke; Hatano, Itaru; Koga, Kenichiro; Tanaka, Hideki
2008-01-01
A phase diagram of water in single-walled carbon nanotubes at atmospheric pressure is proposed, which summarizes ice structures and their melting points as a function of the tube diameter up to 1.7 nm. The investigation is based on extensive molecular dynamics simulations over numerous thermodynamic states on the temperature-diameter plane. Spontaneous freezing of water in the simulations and the analysis of ice structures at 0 K suggest that there exist at least nine ice phases in the cylindrical space, including those reported by x-ray diffraction studies and those unreported by simulation or experiment. Each ice has a structure that maximizes the number of hydrogen bonds under the cylindrical confinement. The results show that the melting curve has many local maxima, each corresponding to the highest melting point for each ice form. The global maximum in the melting curve is located at approximately 11 A, where water freezes in a square ice nanotube. PMID:18162549
Understanding starch gelatinization: The phase diagram approach.
Carlstedt, Jonas; Wojtasz, Joanna; Fyhr, Peter; Kocherbitov, Vitaly
2015-09-20
By constructing a detailed phase diagram for the potato starch-water system based on data from optical microscopy, synchrotron X-ray scattering and differential scanning calorimetry, we show that gelatinization can be interpreted in analogy with a eutectic transition. The phase rule explains why the temperature of the gelatinization transition (G) is independent on water content. Furthermore, the melting (M1) endotherm observed in DSC represents a liquidus line; the temperature for this event increases with increasing starch concentration. Both the lamellar spacing and the inter-helix distance were observed to decrease with increasing starch content for starch concentrations between approximately 65 wt% and 75 wt%, while the inter-helix distance continued decreasing upon further dehydration. Understanding starch gelatinization has been a longstanding challenge. The novel approach presented here shows interpretation of this phenomenon from a phase equilibria perspective. PMID:26050889
Aeroflex Technology as Class-Y Demonstrator
NASA Technical Reports Server (NTRS)
Suh, Jong-ook; Agarwal, Shri; Popelar, Scott
2014-01-01
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.
Oak Ridge K-25 Site Technology Logic Diagram. Volume 2, Technology Logic Diagrams
Fellows, R.L.
1993-02-26
The Oak Ridge K-25 Technology Logic Diagram (TLD), a decision support tool for the K-25 Site, was developed to provide a planning document that relates envirorunental restoration and waste management problems at the Oak Ridge K-25 Site to potential technologies that can remediate these problems. The TLD technique identifies the research necessary to develop these technologies to a state that allows for technology transfer and application to waste management, remedial action, and decontamination and decommissioning activities. The TLD consists of four separate volumes-Vol. 1, Vol. 2, Vol. 3A, and Vol. 3B. Volume 1 provides introductory and overview information about the TLD. This volume, Volume 2, contains logic diagrams with an index. Volume 3 has been divided into two separate volumes to facilitate handling and use.
Phase diagram for the transition from photonic crystals to dielectric metamaterials.
Rybin, Mikhail V; Filonov, Dmitry S; Samusev, Kirill B; Belov, Pavel A; Kivshar, Yuri S; Limonov, Mikhail F
2015-01-01
Photonic crystals and dielectric metamaterials represent two different classes of artificial media but are often composed of similar structural elements. The question is how to distinguish these two types of periodic structures when their parameters, such as permittivity and lattice constant, vary continuously. Here we discuss transition between photonic crystals and dielectric metamaterials and introduce the concept of a phase diagram, based on the physics of Mie and Bragg resonances. We show that a periodic photonic structure transforms into a metamaterial when the Mie gap opens up below the lowest Bragg bandgap where the homogenization approach can be justified and the effective permeability becomes negative. Our theoretical approach is confirmed by microwave experiments for a metacrystal composed of tubes filled with heated water. This analysis yields deep insight into the properties of periodic structures, and provides a useful tool for designing different classes of electromagnetic materials with variable parameters. PMID:26626302
Phase diagram for the transition from photonic crystals to dielectric metamaterials
Rybin, Mikhail V.; Filonov, Dmitry S.; Samusev, Kirill B.; Belov, Pavel A.; Kivshar, Yuri S.; Limonov, Mikhail F.
2015-01-01
Photonic crystals and dielectric metamaterials represent two different classes of artificial media but are often composed of similar structural elements. The question is how to distinguish these two types of periodic structures when their parameters, such as permittivity and lattice constant, vary continuously. Here we discuss transition between photonic crystals and dielectric metamaterials and introduce the concept of a phase diagram, based on the physics of Mie and Bragg resonances. We show that a periodic photonic structure transforms into a metamaterial when the Mie gap opens up below the lowest Bragg bandgap where the homogenization approach can be justified and the effective permeability becomes negative. Our theoretical approach is confirmed by microwave experiments for a metacrystal composed of tubes filled with heated water. This analysis yields deep insight into the properties of periodic structures, and provides a useful tool for designing different classes of electromagnetic materials with variable parameters. PMID:26626302
Unknown
2011-08-17
and its relationships with CD and AAO extractable Mn, Al, Fe among depth, site, drainage class and treatment were evaluated. Soil P forms were highly correlated with iron oxides across sites, drainage classes, treatments, and depth intervals...
TWISTED DIAGRAMS AND HOMOTOPY SHEAVES THOMAS HUTTEMANN AND OLIVER RONDIGS
TWISTED DIAGRAMS AND HOMOTOPY SHEAVES THOMAS HÂ¨UTTEMANN AND OLIVER RÂ¨ONDIGS Abstract. Twisted HÂ¨UTTEMANN AND OLIVER RÂ¨ONDIGS The twisted diagram Y - Z is a strict sheaf if its structure map F, and the structure maps act through specified "twisting" functors between these categories. Ex- amples include
On some dynamical diagrams of chemical reaction engineering.
Aris, Rutherford
1999-03-01
A brief historical survey of some of the influential types of diagrams that have been used in chemical reaction engineering is given. These include the phase plane, the simple autocatalytic diagram, and the stroboscopic phase plane. (c) 1999 American Institute of Physics. PMID:12779797
An Introductory Idea for Teaching Two-Component Phase Diagrams
ERIC Educational Resources Information Center
Peckham, Gavin D.; McNaught, Ian J.
2011-01-01
The teaching of two-component phase diagrams has attracted little attention in this "Journal," and it is hoped that this article will make a useful contribution. Current physical chemistry textbooks describe two-component phase diagrams adequately, but do so in a piecemeal fashion one section at a time; first solid-liquid equilibria, then…
Water, Water Everywhere: Phase Diagrams of Ordinary Water Substance
ERIC Educational Resources Information Center
Glasser, L.
2004-01-01
The full phase diagram of water in the form of a graphical representation of the three-dimensional (3D) PVT diagram using authentic data is presented. An interesting controversy regarding the phase behavior of water was the much-touted proposal of a solid phase of water, polywater, supposedly stable under atmospheric conditions.
Poster: Force-Directed Layout for Euler Diagrams Luana Micallef
Kent, University of
Poster: Force-Directed Layout for Euler Diagrams Luana Micallef and Peter Rodgers University layouts in a reasonable time. We adopt a force-directed approach to automatically layout aesthetically pleasing Euler diagrams in a relatively fast time. A Java prototype demonstrates our novel force model
Adding Value to Force Diagrams: Representing Relative Force Magnitudes
ERIC Educational Resources Information Center
Wendel, Paul
2011-01-01
Nearly all physics instructors recognize the instructional value of force diagrams, and this journal has published several collections of exercises to improve student skill in this area. Yet some instructors worry that too few students perceive the conceptual and problem-solving utility of force diagrams, and over recent years a rich variety of…
Improving Students' Diagram Comprehension with Classroom Instruction
ERIC Educational Resources Information Center
Cromley, Jennifer G.; Perez, Tony C.; Fitzhugh, Shannon L.; Newcombe, Nora S.; Wills, Theodore W.; Tanaka, Jacqueline C.
2013-01-01
The authors tested whether students can be taught to better understand conventional representations in diagrams, photographs, and other visual representations in science textbooks. The authors developed a teacher-delivered, workbook-and-discussion-based classroom instructional method called Conventions of Diagrams (COD). The authors trained 1…
Extra Exercises for Chapter 9. Information Feedback Causal Loop Diagrams
Ford, Andrew
loop diagram for the electric blanket. Suppose you wish to draw a causal loop diagram to describe temperature control from an electric blanket. This system is similar to the home heating system discussed on the left acts to control the heat flow to the sleeping space from the electric wires in the blanket. (A
Diagramming Word Problems: A Strategic Approach for Instruction
ERIC Educational Resources Information Center
van Garderen, Delinda; Scheuermann, Amy M.
2015-01-01
While often recommended as a strategy to use in order to solve word problems, drawing a diagram is a complex process that requires a good depth of understanding. Many middle school students with learning disabilities (LD) often struggle to use diagrams in an effective and efficient manner. This article presents information for teaching middle…
SCORPION DIAGRAM: DORSAL VIEW OF CENTRUROIDESVITTATUS Chester J. Stojanovich
23e SCORPION DIAGRAM: DORSAL VIEW OF CENTRUROIDESVITTATUS Chester J. Stojanovich ,...pedipalp I I I po s tab do m e n( ..... ..... ..... #12;.24 SCORPION DIAGRAM: VENTRAL VIEW OF CENTRUROIDES with many setae 8tinger with few setae Hadruru.· arizonensis OLIVE HAIRY SCORPION I I stinger without
Traffic Engineering Eye Diagram Karol Kowalik and Martin Collier
Collier, Martin
in administering the network. However, they lack means to compare various traffic assignment methods. Using1 Traffic Engineering Eye Diagram Karol Kowalik and Martin Collier Research Institute for Networks and informative. We propose a tool for this purpose which we call the Traffic Engineering Eye Diagram (TEED). Eye
EXCITED YOUNG DIAGRAMS, EQUIVARIANT K-THEORY, AND SCHUBERT VARIETIES
Kreiman, Victor
EXCITED YOUNG DIAGRAMS, EQUIVARIANT K-THEORY, AND SCHUBERT VARIETIES WILLIAM GRAHAM AND VICTOR varieties. These descriptions and formulas are given in terms of two equivalent combinatorial models: excited Young diagrams and set-valued tableaux. The restriction fomulas are positive
Heuristic Diagrams as a Tool to Teach History of Science
ERIC Educational Resources Information Center
Chamizo, Jose A.
2012-01-01
The graphic organizer called here heuristic diagram as an improvement of Gowin's Vee heuristic is proposed as a tool to teach history of science. Heuristic diagrams have the purpose of helping students (or teachers, or researchers) to understand their own research considering that asks and problem-solving are central to scientific activity. The…
Jamming phase diagram of colloidal dispersions by molecular dynamics simulations
Wu, Jianzhong
Jamming phase diagram of colloidal dispersions by molecular dynamics simulations Anil Kumar report a three-dimensional jamming phase diagram of a model colloidal system obtained from molecularVerweyOverbeek potential. The jamming threshold is uniquely defined in terms of the critical volume fraction, the critical
Diagram, Gesture, Agency: Theorizing Embodiment in the Mathematics Classroom
ERIC Educational Resources Information Center
de Freitas, Elizabeth; Sinclair, Nathalie
2012-01-01
In this paper, we use the work of philosopher Gilles Chatelet to rethink the gesture/diagram relationship and to explore the ways mathematical agency is constituted through it. We argue for a fundamental philosophical shift to better conceptualize the relationship between gesture and diagram, and suggest that such an approach might open up new…
Using a Spreadsheet To Explore Melting, Dissolving and Phase Diagrams.
ERIC Educational Resources Information Center
Goodwin, Alan
2002-01-01
Compares phase diagrams relating to the solubilities and melting points of various substances in textbooks with those generated by a spreadsheet using data from the literature. Argues that differences between the diagrams give rise to new chemical insights. (Author/MM)
Pourbaix ("E"-pH-M) Diagrams in Three Dimensions
ERIC Educational Resources Information Center
Pesterfield, Lester L.; Maddox, Jeremy B.; Crocker, Michael S.; Schweitzer, George K.
2012-01-01
"E"-pH (Pourbaix) diagrams provide an important graphical link between the thermodynamic calculations of potential, pH, equilibrium constant, concentration, and changes in Gibbs energy and the experimentally observed behavior of species in aqueous solutions. The utility of "E"-pH diagrams is extended with the introduction of an additional…
Phase Diagram and Scattering Intensity of Binary Amphiphilic Systems
Schwarz, Ulrich
Phase Diagram and Scattering Intensity of Binary Amphiphilic Systems G. Gompper and Ulrich S parameter, which describe the con- centration and orientation of the amphiphile, respectively, is used to study the phase diagram and the scattering intensity of binary amphiphilic systems. With increasing
Lecture 7: Voronoi Diagrams Presented by Allen Miu
pi pi : site points #12;Definition of Voronoi Diagram Â· Let P be a set of n distinct points (sites) in the plane. Â· The Voronoi diagram of P is the subdivision of the plane into n cells, one for each site. Â· A point q lies in the cell corresponding to a site pi P iff Euclidean_Distance( q, pi )
ERIC Educational Resources Information Center
Hesser, Kathi; Buck, Gayle; Dopp, Sandra
2005-01-01
In the activity described in this article, students will explore how variables in a first-class lever, specifically arm length, position of the fulcrum, and placement of the load, affect the effort needed to lift the load. To begin the lesson, demonstrate to the class how a first-class lever works and review what is meant by the terms fulcrum,…
Alpay, S. Pamir
Storrs Campus Freshmen Entering Class of: Retention After 1 yr. 2 year Retention 3 year Retention 80 78 Fall 2002 88 82 79 76 Total Five Regional Campuses Freshmen Entering Class of: Retention After 1 yr. 2 year Retention 3 year Retention Graduated in 6 yrs. Freshmen Entering Class of: Retention
Particle-hole ring diagrams for fermions in two dimensions
N. Kaiser
2014-08-28
The set of particle-hole ring diagrams for a many-fermion system in two dimensions is studied. The complex-valued polarization function is derived in detail and shown to be expressible in terms of square-root functions. For a contact-interaction the perturbative contributions to the energy per particle $\\bar E(k_f)$ are calculated in closed analytical form from third up to twelfth order. The resummation of the particle-hole ring diagrams to all orders is studied and a pronounced dependence on the dimensionless coupling parameter $\\alpha$ is found. There is a substantial difference between the complete ring-sum with all exchange-type diagrams included and the standard resummation of the leading $n$-ring diagrams only. The spin factor $S_n(g)$ associated to the $n$-th order ring diagrams is derived for arbitrary spin-degeneracy $g$.
Particle–hole ring diagrams for fermions in two dimensions
Kaiser, N.
2014-11-15
The set of particle–hole ring diagrams for a many-fermion system in two dimensions is studied. The complex-valued polarization function is derived in detail and shown to be expressible in terms of square-root functions. For a contact-interaction the perturbative contributions to the energy per particle ?(k{sub f}) are calculated in a closed analytical form from third up to twelfth order. The resummation of the particle–hole ring diagrams to all orders is studied and a pronounced dependence on the dimensionless coupling parameter ? is found. There is a substantial difference between the complete ring-sum with all exchange-type diagrams included and the standard resummation of the leading n-ring diagrams only. The spin factor S{sub n}(g) associated to the nth order ring diagrams is derived for arbitrary spin-degeneracy g.
Calculation of Gallium-metal-Arsenic phase diagrams
NASA Technical Reports Server (NTRS)
Scofield, J. D.; Davison, J. E.; Ray, A. E.; Smith, S. R.
1991-01-01
Electrical contacts and metallization to GaAs solar cells must survive at high temperatures for several minutes under specific mission scenarios. The determination of which metallizations or alloy systems that are able to withstand extreme thermal excursions with minimum degradation to solar cell performance can be predicted by properly calculated temperature constitution phase diagrams. A method for calculating a ternary diagram and its three constituent binary phase diagrams is briefly outlined and ternary phase diagrams for three Ga-As-X alloy systems are presented. Free energy functions of the liquid and solid phase are approximated by the regular solution theory. Phase diagrams calculated using this method are presented for the Ga-As-Ge and Ga-As-Ag systems.
Core collapse supernovae in the QCD phase diagram
Fischer, T.; Blaschke, D.; Hempel, M.; Klaehn, T.; Lastowiecki, R.; Liebendoerfer, M.; Martinez-Pinedo, G.; Pagliara, G.; Sagert, I.; Sandin, F.; Schaffner-Bielich, J.; Typel, S.
2012-05-15
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.
ERIC Educational Resources Information Center
Cromley, Jennifer G.; Bergey, Bradley W.; Fitzhugh, Shannon; Newcombe, Nora; Wills, Theodore W.; Shipley, Thomas F.; Tanaka, Jacqueline C.
2013-01-01
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…
ERIC Educational Resources Information Center
Jian, Yu-Cin; Wu, Chao-Jung
2015-01-01
We investigated strategies used by readers when reading a science article with a diagram and assessed whether semantic and spatial representations were constructed while reading the diagram. Seventy-one undergraduate participants read a scientific article while tracking their eye movements and then completed a reading comprehension test. Our…
Improving perturbation theory with cactus diagrams
Martha Constantinou; Haralambos Panagopoulos; Apostolos Skouroupathis
2006-12-04
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.
Diagram of Cell to Cell Communication
NASA Technical Reports Server (NTRS)
2002-01-01
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.
Schematic diagram of (VDT) - open throat design
NASA Technical Reports Server (NTRS)
1928-01-01
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)
Not Available
1993-09-01
The Oak Ridge National Laboratory Technology Logic Diagram (TLD) was developed to provide a decision support tool that relates environmental restoration (ER) and waste management (WM) problems at Oak Ridge National Laboratory (ORNL) to potential technologies that can remediate these problems. The TLD identifies the research, development, demonstration, testing, and evaluation needed to develop these technologies to a state that allows technology transfer and application to decontamination and decommissioning (D&D), remedial action (RA), and WM activities. The TLD consists of three fundamentally separate volumes: Vol. 1 (Technology Evaluation), Vol. 2 (Technology Logic Diagram), and Vol. 3 (Technology Evaluation Data Sheets). Part A of Vols. 1. and 2 focuses on D&D. Part B of Vols. 1 and 2 focuses on the RA of contaminated facilities. Part C of Vols. 1 and 2 focuses on WM. Each part of Vol. 1 contains an overview of the TLD, an explanation of the program-specific responsibilities, a review of identified technologies, and the rankings of remedial technologies. Volume 2 (Pts. A, B, and C) contains the logic linkages among EM goals, environmental problems, and the various technologies that have the potential to solve these problems. Volume 3 (Pts. A, B, and C) contains the TLD data sheets. Remedial action is the focus of Vol. 2, Pt. B, which has been divided into the three necessary subelements of the RA: characterization, RA, and robotics and automation. Each of these sections address general ORNL problems, which are then broken down by problem area/constituents and linked to potential remedial technologies. The diagrams also contain summary information about a technology`s status, its science and technology needs, and its implementation needs.
Latitudinal distribution of soft X-ray flares and dispairty in butterfly diagram
NASA Astrophysics Data System (ADS)
Pandey, K. K.; Yellaiah, G.; Hiremath, K. M.
2015-04-01
We present statistical analysis of about 63000 soft X-ray flare (class?C) observed by geostationary operational environmental satellite (GOES) during the period 1976-2008. Class wise occurrence of soft X-ray (SXR) flare is in declining trend since cycle 21. The distribution pattern of cycle 21 shows the transit of hemispheric dominance of flare activity from northern to southern hemisphere and remains there during cycle 22 and 23. During the three cycles, 0-100, 21-300 latitude belts in southern hemisphere (SH) and 31-400 latitude belt in northern hemisphere (NH) are mightier. The 11-200 latitude belt of both hemisphere is mightiest. Correlation coefficient between consecutive latitude appears to be increasing from equator to poleward in northern hemisphere whereas pole to equatorward in southern hemisphere. Slope of the regression line fitted with asymmetry time series of daily flare counts is negative in all three cycles for different classes of flares. The yearly asymmetry curve fitted by a sinusoidal function varies from 5.6 to 11 years period and depends upon the intensity of flare. Variation, of curve fitted with wings of butterfly diagram, from first to second order polynomial suggests that latitudinal migration of flare activity varies from cycle to cycle, northern to southern hemisphere. The variation in slope of the butterfly wing of different flare class indicates the non uniform migration of flare activity.
Dynamic phase diagram of soft nanocolloids
NASA Astrophysics Data System (ADS)
Gupta, Sudipta; Camargo, Manuel; Stellbrink, Jörg; Allgaier, Jürgen; Radulescu, Aurel; Lindner, Peter; Zaccarelli, Emanuela; Likos, Christos N.; Richter, Dieter
2015-08-01
We present a comprehensive experimental and theoretical study covering micro-, meso- and macroscopic length and time scales, which enables us to establish a generalized view in terms of structure-property relationship and equilibrium dynamics of soft colloids. We introduce a new, tunable block copolymer model system, which allows us to vary the aggregation number, and consequently its softness, by changing the solvophobic-to-solvophilic block ratio (m : n) over two orders of magnitude. Based on a simple and general coarse-grained model of the colloidal interaction potential, we verify the significance of interaction length ?int governing both structural and dynamic properties. We put forward a quantitative comparison between theory and experiment without adjustable parameters, covering a broad range of experimental polymer volume fractions (0.001 <= ? <= 0.5) and regimes from ultra-soft star-like to hard sphere-like particles, that finally results in the dynamic phase diagram of soft colloids. In particular, we find throughout the concentration domain a strong correlation between mesoscopic diffusion and macroscopic viscosity, irrespective of softness, manifested in data collapse on master curves using the interaction length ?int as the only relevant parameter. A clear reentrance in the glass transition at high aggregation numbers is found, recovering the predicted hard-sphere (HS) value in the hard-sphere like limit. Finally, the excellent agreement between our new experimental systems with different but already established model systems shows the relevance of block copolymer micelles as a versatile realization of soft colloids and the general validity of a coarse-grained approach for the description of the structure and dynamics of soft colloids.We present a comprehensive experimental and theoretical study covering micro-, meso- and macroscopic length and time scales, which enables us to establish a generalized view in terms of structure-property relationship and equilibrium dynamics of soft colloids. We introduce a new, tunable block copolymer model system, which allows us to vary the aggregation number, and consequently its softness, by changing the solvophobic-to-solvophilic block ratio (m : n) over two orders of magnitude. Based on a simple and general coarse-grained model of the colloidal interaction potential, we verify the significance of interaction length ?int governing both structural and dynamic properties. We put forward a quantitative comparison between theory and experiment without adjustable parameters, covering a broad range of experimental polymer volume fractions (0.001 <= ? <= 0.5) and regimes from ultra-soft star-like to hard sphere-like particles, that finally results in the dynamic phase diagram of soft colloids. In particular, we find throughout the concentration domain a strong correlation between mesoscopic diffusion and macroscopic viscosity, irrespective of softness, manifested in data collapse on master curves using the interaction length ?int as the only relevant parameter. A clear reentrance in the glass transition at high aggregation numbers is found, recovering the predicted hard-sphere (HS) value in the hard-sphere like limit. Finally, the excellent agreement between our new experimental systems with different but already established model systems shows the relevance of block copolymer micelles as a versatile realization of soft colloids and the general validity of a coarse-grained approach for the description of the structure and dynamics of soft colloids. Electronic supplementary information (ESI) available: SANS, DLS and Rheology data modeling. See DOI: 10.1039/C5NR03702F
Energetic studies and phase diagram of thioxanthene.
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
2009-11-19
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 degrees = 0.1 MPa) molar enthalpy of formation of crystalline thioxanthene (117.4 +/- 4.1 kJ x 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 degrees = 0.1 MPa) molar enthalpy of sublimation, at T = 298.15 K (101.3 +/- 0.8 kJ x mol(-1)), was derived. From the latter value and from the enthalpy of formation of the solid, the standard (p degrees = 0.1 MPa) enthalpy of formation of gaseous thioxanthene was calculated as 218.7 +/- 4.2 kJ x 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. PMID:19821598
The high-z quasar Hubble Diagram
NASA Astrophysics Data System (ADS)
Melia, Fulvio
2014-01-01
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%.
The neodymium-gold phase diagram
NASA Astrophysics Data System (ADS)
Saccone, A.; Macciò, D.; Delfino, S.; Ferro, R.
1999-05-01
The Nd-Au phase diagram was studied in the 0 to 100 at. pct Au composition range by differential thermal analysis (DTA), X-ray diffraction (XRD), optical microscopy (LOM), scanning electron microscopy (SEM), and electron probe microanalysis (EPMA). Six intermetallic phases were identified, the crystallographic structures were determined or confirmed, and the melting behavior was determined, as follows: Nd2Au, orthorhombic oP12-Co2Si type, peritectic decomposition at 810 °C; NdAu, R.T. form, orthorhombic oP8-FeB type, H.T. forms, orthorhombic oC8-CrB type and, at a higher temperature, cubic cP2-CsCl type, melting point 1470 °C; Nd3Au4, trigonal hR42-Pu3Pd4 type, peritectic decomposition at 1250 °C; Nd17Au36, tetragonal tP106-Nd17Au36 type, melting point 1170 °C; Nd14Au51, hexagonal hP65-Gd14Ag51 type, melting point 1210 °C; and NdAu6, monoclinic mC28-PrAu6 type, peritectic decomposition at 875 °C. Four eutectic reactions were found, respectively, at 19.0 at. pct Au and 655 °C, at 63.0 at. pct Au and 1080 °C, at 72.0 at. pct Au and 1050 °C, and, finally, at 91.0 at. pct Au and 795 °C. A catatectic decomposition of the ( ?Nd) phase, at 825 °C and ?1 at. pct Au, was also found. The results are briefly discussed and compared to those for the other rare earth-gold ( R-Au) systems. A short discussion of the general alloying behavior of the “coinage metals” (Cu, Ag, and Au) with the rare-earth metals is finally presented.
The high-z quasar Hubble Diagram
Melia, Fulvio
2014-01-01
Two recent discoveries have made it possible for us to begin using high-z quasars as standard candles to construct a Hubble Diagram (HD) at z > 6. These are (1) the recognition from reverberation mapping that a relationship exists between the optical/UV luminosity and the distance of line-emitting gas from the central ionizing source. Thus, together with a measurement of the velocity of the line-emitting gas, e.g., via the width of BLR lines, such as Mg II, a single observation can therefore in principle provide a determination of the black hole's mass; and (2) the identification of quasar ULAS J1120+0641 at z = 7.085, which has significantly extended the redshift range of these sources, providing essential leverage when fitting theoretical luminosity distances to the data. In this paper, we use the observed fluxes and Mg II line-widths of these sources to show that one may reasonably test the predicted high-z distance versus redshift relationship, and we assemble a sample of 20 currently available high-z quasars for this exercise. We find a good match between theory and observations, suggesting that a more complete, high-quality survey may indeed eventually produce an HD to complement the highly-detailed study already underway (e.g., with Type Ia SNe, GRBs, and cosmic chronometers) at lower redshifts. With the modest sample we have here, we show that the R{sub h} = 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 R{sub h} = ct Universe is more likely than ?CDM to be correct, by a ratio of about 85% to 15%.
The High-z Quasar Hubble Diagram
Fulvio Melia
2013-12-20
Two recent discoveries have made it possible for us to begin using high-z quasars as standard candles to construct a Hubble Diagram (HD) at z > 6. These are (1) the recognition from reverberation mapping that a relationship exists between the optical/UV luminosity and the distance of line-emitting gas from the central ionizing source. Thus, together with a measurement of the velocity of the line-emitting gas, e.g., via the width of BLR lines, such as Mg II, a single observation can therefore in principle provide a determination of the black hole's mass; and (2) the identification of quasar ULAS J1120+0641 at z = 7.085, which has significantly extended the redshift range of these sources, providing essential leverage when fitting theoretical luminosity distances to the data. In this paper, we use the observed fluxes and Mg II line-widths of these sources to show that one may reasonably test the predicted high-z distance versus redshift relationship, and we assemble a sample of 20 currently available high-z quasars for this exercise. We find a good match between theory and observations, suggesting that a more complete, high-quality survey may indeed eventually produce an HD to complement the highly-detailed study already underway (e.g., with Type Ia SNe, GRBs, and cosmic chronometers) at lower redshifts. With the modest sample we have here, we show that the R_h=ct Universe and LCDM both fit the data quite well, though the smaller number of free parameters in the former produces a more favorable outcome when we calculate likelihoods using the Akaike, Kullback, and Bayes Information Criteria. These three statistical tools result in similar probabilities, indicating that the R_h=ct Universe is more likely than LCDM to be correct, by a ratio of about 85% to 15%.
Dynamic phase diagram of soft nanocolloids.
Gupta, Sudipta; Camargo, Manuel; Stellbrink, Jörg; Allgaier, Jürgen; Radulescu, Aurel; Lindner, Peter; Zaccarelli, Emanuela; Likos, Christos N; Richter, Dieter
2015-09-01
We present a comprehensive experimental and theoretical study covering micro-, meso- and macroscopic length and time scales, which enables us to establish a generalized view in terms of structure-property relationship and equilibrium dynamics of soft colloids. We introduce a new, tunable block copolymer model system, which allows us to vary the aggregation number, and consequently its softness, by changing the solvophobic-to-solvophilic block ratio (m?:?n) over two orders of magnitude. Based on a simple and general coarse-grained model of the colloidal interaction potential, we verify the significance of interaction length ?int governing both structural and dynamic properties. We put forward a quantitative comparison between theory and experiment without adjustable parameters, covering a broad range of experimental polymer volume fractions (0.001 ??? 0.5) and regimes from ultra-soft star-like to hard sphere-like particles, that finally results in the dynamic phase diagram of soft colloids. In particular, we find throughout the concentration domain a strong correlation between mesoscopic diffusion and macroscopic viscosity, irrespective of softness, manifested in data collapse on master curves using the interaction length ?int as the only relevant parameter. A clear reentrance in the glass transition at high aggregation numbers is found, recovering the predicted hard-sphere (HS) value in the hard-sphere like limit. Finally, the excellent agreement between our new experimental systems with different but already established model systems shows the relevance of block copolymer micelles as a versatile realization of soft colloids and the general validity of a coarse-grained approach for the description of the structure and dynamics of soft colloids. PMID:26219628
Construction of a Penrose Diagram for an Accreting Black Hole
Beth A. Brown; James Lindesay
2008-11-04
A Penrose diagram is constructed for a spatially coherent black hole that accretes at stepwise steady rates as measured by a distant observer from an initial state described by a metric of Minkowski form. Coordinate lines are computationally derived, and radial light-like trajectories verify the viability of the diagram. Coordinate dependencies of significant features, such as the horizon and radial mass scale, are clearly demonstrated on the diagram. The onset of a singularity at the origin is shown to open a new region in space-time that contains the interior of the black hole.
Cu-Zn binary phase diagram and diffusion couples
NASA Technical Reports Server (NTRS)
Mccoy, Robert A.
1992-01-01
The objectives of this paper are to learn: (1) what information a binary phase diagram can yield; (2) how to construct and heat treat a simple diffusion couple; (3) how to prepare a metallographic sample; (4) how to operate a metallograph; (5) how to correlate phases found in the diffusion couple with phases predicted by the phase diagram; (6) how diffusion couples held at various temperatures could be used to construct a phase diagram; (7) the relation between the thickness of an intermetallic phase layer and the diffusion time; and (8) the effect of one species of atoms diffusing faster than another species in a diffusion couple.
Federal Register 2010, 2011, 2012, 2013, 2014
2011-09-02
... Bureau of Ocean Energy Management, Regulation and Enforcement Outer Continental Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer Continental Shelf Block Diagrams AGENCY... revised North American Datum of 1927 (NAD 27) Outer Continental Shelf Official Protraction Diagram,...
Federal Register 2010, 2011, 2012, 2013, 2014
2011-01-18
... Bureau of Ocean Energy Management, Regulation and Enforcement Outer Continental Shelf Official Protraction Diagram and Supplemental Official Outer Continental Shelf Block Diagrams AGENCY: Bureau of Ocean... American Datum of 1983 (NAD 83) Outer Continental Shelf Official Protraction Diagram and...
The Fermion Representation of Quantum Toroidal Algebra on 3D Young Diagrams
NASA Astrophysics Data System (ADS)
Cai, Li-Qiang; Wang, Li-Fang; Wu, Ke; Yang, Jie
2014-07-01
We develop an equivalence between the diagonal slices and the perpendicular slices of 3D Young diagrams via Maya diagrams. Furthermore, we construct the fermion representation of quantum toroidal algebra on the 3D Young diagrams perpendicularly sliced.
NASA Astrophysics Data System (ADS)
Lin, Sui; Chen, Tzu-Fang
2002-11-01
The physical model describing the Yin-Yang balance in the tai-chi diagram via the melting and freezing processes in a rotating device presented in parts 1 and 2 is further developed for the contemporary tai-chi diagram and in the yuan-chi diagram. The contemporary tai-chi diagram shown in Fig.1 is a simplification form of the ancient tai-chi diagram presented in Reference [2]. There are two semi-circles forming the interface curve between the yin and yang in the contemporary tai-chi diagram. By knowing the location of the interface between the yin and yang in the contemporary tai-chi diagram, the requirement for the simulation model is to find the condition to match the interface location. The simplification changes not only the structure but also the physical insight of the ancient tai-chi diagram, which will be described in the present study. The yuan-chi diagram shown in Fig.2 is the combination of the Master Chen’s tai-chi diagram presented in References [1,2] and the contemporary tai-chi diagram. The formulation of the yuan-chi diagram is similar to that of contemporary tai-chi diagram. The Fu Xi’s eight trigrams present three levels of yin-yang relation that are a natural result from the contemporary tai-chi diagram, which will be described in the last part of this study.
Bhanot, Gyan (Princeton, NJ); Blumrich, Matthias A. (Ridgefield, CT); Chen, Dong (Croton On Hudson, NY); Coteus, Paul W. (Yorktown Heights, NY); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Steinmacher-Burow, Burkhard D. (Mount Kisco, NY); Takken, Todd E. (Mount Kisco, NY); Vranas, Pavlos M. (Bedford Hills, NY)
2009-09-08
Class network routing is implemented in a network such as a computer network comprising a plurality of parallel compute processors at nodes thereof. Class network routing allows a compute processor to broadcast a message to a range (one or more) of other compute processors in the computer network, such as processors in a column or a row. Normally this type of operation requires a separate message to be sent to each processor. With class network routing pursuant to the invention, a single message is sufficient, which generally reduces the total number of messages in the network as well as the latency to do a broadcast. Class network routing is also applied to dense matrix inversion algorithms on distributed memory parallel supercomputers with hardware class function (multicast) capability. This is achieved by exploiting the fact that the communication patterns of dense matrix inversion can be served by hardware class functions, which results in faster execution times.
Janusz Grabowski
2014-08-29
We present a graded-geometric approach to modular classes of Lie algebroids and their generalizations, introducing in this setting an idea of relative modular class of a Dirac structure for a certain type of Courant algebroids, called projectable. This novel approach puts several concepts related to Poisson geometry and its generalizations in a new light and simplifies proofs. It gives, in particular, a nice geometric interpretation of modular classes of twisted-Poisson structures on Lie algebroids.
Limits to Open Class Performance?
NASA Technical Reports Server (NTRS)
Bowers, Albion H.
2007-01-01
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.
Online, Bigger Classes May Be Better Classes
ERIC Educational Resources Information Center
Parry, Marc
2010-01-01
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…
Architecture flow diagrams under teamwork{reg_sign}
Nicinski, T.
1992-02-01
The Teamwork CASE tool allows Data Flow Diagrams (DFDs) to be maintained for structured analysis. Fermilab has extended teamwork under UNIX{trademark} to permit Hatley and Pirbhai Architecture Flow Diagrams (AFDs) to be associated with DFDs and subsequently maintained. This extension, called TWKAFD, allows a user to open an AFD, graphically edit it, and replace it into a TWKAFD maintained library. Other aspects of Hatley and Pirbhai`s methodology are supported. This paper presents a quick tutorial on Architecture Diagrams. It then describes the user`s view of TWKAFD, the experience incorporating it into teamwork, and the successes with using the Architecture Diagram methodology along with the shortcomings of using the teamwork/TWKAFD tool. 8 refs.
Phase diagrams of hard spheres with algebraic attractive interactions
Camp, Philip J.
2003-01-01
The phase diagrams of systems made up of hard spheres interacting with attractive potentials of the form -1/r3+sigma are calculated using Monte Carlo simulations, second-order thermodynamic perturbation theory, and an ...
22. Power plant engine pipingcompressed air piping diagram and sections, ...
22. Power plant engine piping-compressed air piping diagram and sections, sheet 81 of 130 - Naval Air Station Fallon, Power Plant, 800 Complex, off Carson Road near intersection of Pasture & Berney Roads, Fallon, Churchill County, NV
61. THREE LINE WIRING DIAGRAM, 33 KV & NO. 1 ...
61. THREE LINE WIRING DIAGRAM, 33 KV & NO. 1 TRANS BANK, SANTA ANA NO. 1 HYDRO PLANT, OCTOBER 27, 1958. SCE drawing no. 428058-1. - Santa Ana River Hydroelectric System, SAR-1 Powerhouse, Redlands, San Bernardino County, CA
Efficient Decompositional Model Checking for Regular Timing Diagrams
Namjoshi, Kedar
Efficient Decompositional Model Checking for Regular Timing Diagrams Nina Amla1 , E. Allen Emerson1;68 Nina Amla et al. A RTD, like the circuit it describes, may be either asynchronous or syn- chronous
129. PLAN OF IMPROVEMENT, HUNTINGTON BEACH MUNICIPAL PIER: LIGHTING DIAGRAM. ...
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
Representing Embedded System Sequence Diagrams As A Formal Language
Koopman, Philip
Koopman Carnegie Mellon University Electrical and Computer Engineering Department D-202 Hamerschlag Hall, 5000 Forbes Avenue Pittsburgh, PA 15213 beth@cmu.edu, koopman@cmu.edu Abstract. Sequence Diagrams (SDs
Influence diagrams as oil spill decision science tools
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...
Interaction Diagrams for Ambient and Heated Concrete Sections
Law, Angus; Gillie, Martin
2010-01-01
Bending moment axial force interaction diagrams are a commonly used tool in any design office. When designing for fire conditions, the large axial forces which develop place an additional importance on the consideration ...
Delaunay Triangulations and Voronoi Diagrams for Riemannian Manifolds
Frey, Pascal
Delaunay Triangulations and Voronoi Diagrams for Riemannian Manifolds Greg Leibon Departmentof exists. This triangulation has the same properties as in Euclidean space. Algorithms for constructing, Delannay trian- gulations give a canonical triangulation whose vertices are these points
Flame Deflector Section, Elevation, Water Supply Flow Diagram, Exploded ...
Flame Deflector - Section, Elevation, Water Supply Flow Diagram, Exploded Deflector Manifolds, and Interior Perspective - Marshall Space Flight Center, F-1 Engine Static Test Stand, On Route 565 between Huntsville and Decatur, Huntsville, Madison County, AL
9. Photocopy of bottom half of an 1855 organizational diagram ...
9. Photocopy of bottom half of an 1855 organizational diagram of the New York and Erie Railroad. Original in the collections of the Library of Congress. - Erie Railway, New Jersey, New York, Pennsylvania, Deposit, Broome County, NY
8. Photocopy of top half of an 1855 organizational diagram ...
8. Photocopy of top half of an 1855 organizational diagram of the New York and Erie Railroad. Original in the collections of the Library of Congress. - Erie Railway, New Jersey, New York, Pennsylvania, Deposit, Broome County, NY
Heuristic Diagrams as a Tool to Teach History of Science
NASA Astrophysics Data System (ADS)
Chamizo, José A.
2012-05-01
The graphic organizer called here heuristic diagram as an improvement of Gowin's Vee heuristic is proposed as a tool to teach history of science. Heuristic diagrams have the purpose of helping students (or teachers, or researchers) to understand their own research considering that asks and problem-solving are central to scientific activity. The 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.
Towards Constructive Text, Diagram, and Layout Generation for
Towards Constructive Text, Diagram, and Layout Generation for Information Presentation John Reichenberger t Intelligent Views, Darmstadt Combining elements appropriately within a coherent page layout and nature of layout has not, however, been sufficiently addressed within computational approaches; attention
Penguin diagram dominance in radiative weak decays of bottom baryons
Kohara, Yoji
2005-05-01
Radiative weak decays of antitriplet bottom baryons are studied under the assumption of penguin diagram dominance and flavor-SU(3) (or SU(2)) symmetry. Relations among decay rates of various decay modes are derived.
The neodymium-gold phase diagram
Saccone, A.; Maccio, D.; Delfino, S.; Ferro, R.
1999-05-01
The Nd-Au phase diagram was studied in the 0 to 100 at. pct Au composition range by differential thermal analysis (DTA), X-ray diffraction (XRD), optical microscopy (LOM), scanning electron microscopy (SEM), and electron probe microanalysis (EPMA). Six intermetallic phases were identified, the crystallographic structures were determined or confirmed, and the melting behavior was determined, as follows: Nd{sub 2}Au, orthorhombic oP12-Co{sub 2}Si type, peritectic decomposition at 810 C; NdAu, R.T. form, orthorhombic oP8-FeB type, H.T. forms, orthorhombic oC8-CrB type and, at a higher temperature, cubic cP2-CsCl type, melting point 1470 C; Nd{sub 3}Au{sub 4}, trigonal hR42-Pu{sub 3}Pd{sub 4} type, peritectic decomposition at 1250 C; Nd{sub 17}Au{sub 36}, tetragonal tP106-Nd{sub 17}Au{sub 36} type, melting point 1170 C; Nd{sub 14}Au{sub 51}, hexagonal hP65-Gd{sub 14}Ag{sub 51} type, melting point 1210 C; and NdAu{sub 6}, monoclinic mC28-PrAu{sub 6} type, peritectic decomposition at 875 C. Four eutectic reactions were found, respectively, at 19.0 at. pct Au and 655 C, at 63.0 at. pct Au and 1080 C, at 72.0 at. pct Au and 1050 C, and, finally, at 91.0 at. pct Au and 795 C. A catatectic decomposition of the ({beta}Nd) phase, at 825 C and {approx}1 at. pct Au, was also found. The results are briefly discussed and compared to those for the other rare earth-gold (R-Au) systems. A short discussion of the general alloying behavior of the coinage metals (Cu, Ag, and Au) with the rare-earth metals is finally presented.
Construction of Penrose Diagrams for Dynamic Black Holes
NASA Technical Reports Server (NTRS)
Brown, Beth A.; Lindesay, James
2008-01-01
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.
CALCULATING ASTEROSEISMIC DIAGRAMS FOR SOLAR-LIKE OSCILLATIONS
White, Timothy R.; Bedding, Timothy R.; Stello, Dennis; Huber, Daniel; Christensen-Dalsgaard, Jorgen; Kjeldsen, Hans
2011-12-20
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.
ERIC Educational Resources Information Center
Uhl, Christopher
2005-01-01
The last class of the semester is like a goodbye. It can be cold and perfunctory or warm and heartfelt. For many years, I erred on the side of "cold and perfunctory." No more. Now my last classes are a time of celebration and ritual as I invite students to focus on qualities such as acceptance and gratitude.
ERIC Educational Resources Information Center
Tablante, Courtney B.; Fiske, Susan T.
2015-01-01
Discussing socioeconomic status in college classes can be challenging. Both teachers and students feel uncomfortable, yet social class matters more than ever. This is especially true, given increased income inequality in the United States and indications that higher education does not reduce this inequality as much as many people hope. Resources…
ERIC Educational Resources Information Center
Mishel, Lawrence, Ed.; Rothstein, Richard, Ed.
This collection of papers debates the merits of smaller class sizes and research methods used to evaluate the efficacy of this education reform measure. Four chapters focus on (1) "Understanding the Magnitude and Effect of Class Size on Student Achievement" (Alan B. Krueger), which discusses expenditures per student and economic criterion; (2)…
Suellow, S.; Aronson, M.C. ); Rainford, B.D. ); Haen, P. )
1999-04-01
We present the resistivity and ac susceptibility of CeRu[sub 2]Ge [sub 2] at pressures p up to 130thinspthinspkbar. Pressure transforms the system from a ferromagnet into a nonordering Fermi liquid (FL). The suppression of magnetic order at p[sub c]=67 kbar is accompanied by non-Fermi liquid (NFL) behavior. By comparing our results to isoelectronic CeRu[sub 2]( Ge[sub 1[minus]x]Si [sub x])[sub 2] we derive a unified hybridization J phase diagram for the entire material class. The phase diagram is characterized by the FL and Kondo energy scales T[sub FL] and T[sub K] , with the NFL behavior appearing at T[sub FL]=0 K , while T[sub K] remains finite and a smoothly increasing function of J . [copyright] [ital 1999] [ital The American Physical Society
Suellow, S.; Aronson, M.C.; Rainford, B.D.; Haen, P.
1999-04-01
We present the resistivity and ac susceptibility of CeRu{sub 2}Ge {sub 2} at pressures p up to 130thinspthinspkbar. Pressure transforms the system from a ferromagnet into a nonordering Fermi liquid (FL). The suppression of magnetic order at p{sub c}=67 kbar is accompanied by non-Fermi liquid (NFL) behavior. By comparing our results to isoelectronic CeRu{sub 2}( Ge{sub 1{minus}x}Si {sub x}){sub 2} we derive a unified hybridization J phase diagram for the entire material class. The phase diagram is characterized by the FL and Kondo energy scales T{sub FL} and T{sub K} , with the NFL behavior appearing at T{sub FL}=0 K , while T{sub K} remains finite and a smoothly increasing function of J . {copyright} {ital 1999} {ital The American Physical Society}
47 CFR 73.25 - Clear channels; Class A, Class B and Class D stations.
Code of Federal Regulations, 2012 CFR
2012-10-01
... 47 Telecommunication 4 2012-10-01 2012-10-01 false Clear channels; Class A, Class B and Class D stations. 73.25 Section 73.25 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES AM Broadcast Stations § 73.25 Clear channels; Class A, Class B and Class D stations. The frequencies in...
Galaxy evolution across the optical emission-line diagnostic diagrams?
NASA Astrophysics Data System (ADS)
Vitale, M.; Fuhrmann, L.; García-Marín, M.; Eckart, A.; Zuther, J.; Hopkins, A. M.
2015-01-01
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
A Wittgenstein Approach to the Learning of OO-Modeling
ERIC Educational Resources Information Center
Holmboe, Christian
2004-01-01
The paper uses Ludwig Wittgenstein's theories about the relationship between thought, language, and objects of the world to explore the assumption that OO-thinking resembles natural thinking. The paper imports from research in linguistic philosophy to computer science education research. I show how UML class diagrams (i.e., an artificial…
Unified Modeling Language Author : Iza Marfisi Inspired by Pascal Roques
Marfisi-Schottman, Iza
the bank · Client not from the bank · ATM operator · Authorization system · Information system Needs Developer, director, non-computer scientist, clients, manager... 3 #12;UML Diagrams Object class;Exercise 1 : The ATM machine The ATM machine offers the following services : - Giving money to all users
Cukic, Bojan
hospital Patient Hospital Jaundice Diarrhea Measurement Symptom Surgeon Family Doctor Height and the relationships between them 6 Domain Object Model Sales Line Item quantity Item Sale date time isCompleted Store via Associations and Dependency relationship A Software Design Model Store Register houses 1 1 Product
"Phase diagram" of a mean field game
NASA Astrophysics Data System (ADS)
Swiecicki, Igor; Gobron, Thierry; Ullmo, Denis
2016-01-01
Mean field games were introduced by J-M. Lasry and P-L. Lions in the mathematical community, and independently by M. Huang and co-workers in the engineering community, to deal with optimization problems when the number of agents becomes very large. In this article we study in detail a particular example called the "seminar problem" introduced by O. Guéant, J-M. Lasry, and P-L. Lions in 2010. This model contains the main ingredients of any mean field game but has the particular feature that all agents are coupled only through a simple random event (the seminar starting time) that they all contribute to form. In the mean field limit, this event becomes deterministic and its value can be fixed through a self consistent procedure. This allows for a rather thorough understanding of the solutions of the problem, through both exact results and a detailed analysis of various limiting regimes. For a sensible class of initial configurations, distinct behaviors can be associated to different domains in the parameter space. For this reason, the "seminar problem" appears to be an interesting toy model on which both intuition and technical approaches can be tested as a preliminary study toward more complex mean field game models.
Negligent Class Loader Negligent Class Loaders for Software Evolution
Chiba, Shigeru
{yoshiki,chiba}@csg.is.titech.ac.jp Java (NCL : Negligent Class Loader) Java NCL 1 C++ Java Java Java Java (NCL : Negligent Class Loader) Java Java tomcat 3 NCL 4 #12;21 2004 2 2 Java Java 2.1 (weave) Dynamic JBoss UCL(Unified Class Loader) 3 Negligent Class Loader (NCL) Negligent Class Loader (NCL) NCL NCL FCL
Social Class Dialogues and the Fostering of Class Consciousness
ERIC Educational Resources Information Center
Madden, Meredith
2015-01-01
How do critical pedagogies promote undergraduate students' awareness of social class, social class identity, and social class inequalities in education? How do undergraduate students experience class consciousness-raising in the intergroup dialogue classroom? This qualitative study explores undergraduate students' class consciousness-raising in an…
The unusual and the expected in the Si/C phase diagram.
Gao, Guoying; Ashcroft, N W; Hoffmann, Roald
2013-08-01
In the Si/C phase diagram, the only stable phases at P = 1 atm are the numerous polytypes of the simplest 1:1 stoichiometry, SiC. However, many metastable yet likely to be kinetically persistent phases can be found for almost any composition. Given the instability of simple graphite-type structures with considerable Si content, we thought these metastables would be only of the diamondoid class. Indeed they are for Si3C, a stoichiometry we studied on the silicon-rich side of the phase diagram. Yet on the carbon-rich side, which we chose to explore computationally with SiC3, there was a surprise in store, a series of unusual metastable structures. The most striking of these had the appearance of a collapsed graphite structure, with benzenoid C6 units and SiSi bridges between layers. This SiC3 structure is related to known meta-(1,3,5)cyclophanes. Three other metastable structures featured layers with all carbon polyene and polyphenylene arrays. Some of these can be metallic, as we have found. PMID:23841481
Attractive emulsion droplets probe the phase diagram of jammed granular matter.
Jorjadze, Ivane; Pontani, Lea-Laetitia; Newhall, Katherine A; Brujic, Jasna
2011-03-15
It remains an open question whether statistical mechanics approaches apply to random packings of athermal particles. Although a jamming phase diagram has recently been proposed for hard spheres with varying friction, here we use a frictionless emulsion system in the presence of depletion forces to sample the available phase space of packing configurations. Using confocal microscopy, we access their packing microstructure and test the theoretical assumptions. As a function of attraction, our packing protocol under gravity leads to well-defined jammed structures in which global density initially increases above random close packing and subsequently decreases monotonically. Microscopically, the fluctuations in parameters describing each particle, such as the coordination number, number of neighbors, and local packing fraction, are for all attractions in excellent agreement with a local stochastic model, indicating that long-range correlations are not important. Furthermore, the distributions of local cell volumes can be collapsed onto a universal curve using the predicted k-gamma distribution, in which the shape parameter k is fixed by the polydispersity while the effect of attraction is captured by rescaling the average cell volume. Within the Edwards statistical mechanics framework, this result measures the decrease in compactivity with global density, which represents a direct experimental test of a jamming phase diagram in athermal systems. The success of these theoretical tools in describing yet another class of materials gives support to the much-debated statistical physics of jammed granular matter. PMID:21368191
Using Memory Diagrams When Teaching a Java-Based CS1
Holliday, Mark A.
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
Jamming phase diagram of athermal emulsions with short-range attraction
Ivane Jorjadze; Lea-Laetitia Pontani; Katherine Newhall; Jasna Brujic
2011-04-07
Using confocal microscopy we investigate the effect of attraction on the packing of polydisperse emulsions under gravity. We find that the distributions of neighbors, coordination number, and local packing fraction as a function of attraction are captured by recently proposed geometrical modeling and statistical mechanics approaches to granular matter. This extends the range of applicability of these tools to polydisperse, attractive jammed packings. Furthermore, the dependence of packing density and average coordination number on the strength of attraction provides the first experimental test of a phase diagram of athermal jammed particles. The success of these theoretical frameworks in describing a new class of systems gives support to the much-debated statistical physics of jammed matter.
Phase diagram for the transition from photonic crystals to dielectric metamaterials
Rybin, Mikhail V; Samusev, Kirill B; Belov, Pavel A; Kivshar, Yuri S; Limonov, Mikhail F
2015-01-01
Photonic crystals and metamaterials represent two seemingly different classes of artificial electromagnetic media but often they are composed of similar structural elements arranged in periodic lattices. The important question is how to distinguish these two types of periodic photonic structures when their parameters, such as dielectric permittivity and lattice spacing, vary continuously. Here, we discuss transitions between photonic crystals and all-dielectric metamaterials and introduce the concept of a phase diagram and an order parameter for such structured materials, based on the physics of Mie and Bragg resonances. We show that a periodic photonic structure transforms into a metamaterial when the Mie gap opens up below the lowest Bragg bandgap where the homogenization approach can be justified and the effective permeability becomes negative. Our theoretical approach is confirmed by detailed microwave experiments for a metacrystal composed of a square lattice of glass tubes filled with heated water. This...
ERIC Educational Resources Information Center
Johnson, Neil R.
1980-01-01
An aerobic exercise class that focuses on the conditioning of the cardiovascular and muscular systems is presented. Students complete data cards on heart rate, pulse, and exercises to be completed during the forty minute course. (CJ)
Metropolis, N; Rota, G C; Stein, J A
1991-01-01
Although a great deal of work has gone into construction of the irreducible representations of the symmetric group n (and of the general linear group) a simple, intuitive characterization of the symmetry classes is missing. Relying on a systematic distinction between permutations of variables and permutations of places, we provide two such characterizations, showing that elements belonging to any such symmetry class can be described in one of two ways: (i) as the solutions of explicitly given (though not independent) sets of linear equations or (ii) as linear combinations of "simple" elements of a given symmetry class, a simple element being a generalization to an arbitrary symmetry class of the notion of a decomposable skew-symmetric tensor. PMID:11607215
TUESDAYTUESDAY Class Room Time
Walker, Lawrence R.
conditioning for ballet, tap or hip hop. Indoor Cycling No worrying about complicated choreography- just get to strengthen the most integral part of your body. Hot Island Hula This class includes basic hip movements
A Community Based Systems Diagram of Obesity Causes
Allender, Steven; Owen, Brynle; Kuhlberg, Jill; Lowe, Janette; Nagorcka-Smith, Phoebe; Whelan, Jill; Bell, Colin
2015-01-01
Introduction Application of system thinking to the development, implementation and evaluation of childhood obesity prevention efforts represents the cutting edge of community-based prevention. We report on an approach to developing a system oriented community perspective on the causes of obesity. Methods Group model building sessions were conducted in a rural Australian community to address increasing childhood obesity. Stakeholders (n = 12) built a community model that progressed from connection circles to causal loop diagrams using scripts from the system dynamics literature. Participants began this work in identifying change over time in causes and effects of childhood obesity within their community. The initial causal loop diagram was then reviewed and elaborated by 50 community leaders over a full day session. Results The process created a causal loop diagram representing community perceptions of determinants and causes of obesity. The causal loop diagram can be broken down into four separate domains; social influences; fast food and junk food; participation in sport; and general physical activity. Discussion This causal loop diagram can provide the basis for community led planning of a prevention response that engages with multiple levels of existing settings and systems. PMID:26153893
A HR-like Diagram for Solar/Stellar Flares and Corona -- Emission Measure vs Temperature Diagram
Kazunari Shibata; Takaaki Yokoyama
2002-06-03
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.
Hsiao, Mei-Yu; Chen, Chien-Chung; Chen, Jyh-Horng
2009-10-01
With a rapid progress in the field, a great many fMRI studies are published every year, to the extent that it is now becoming difficult for researchers to keep up with the literature, since reading papers is extremely time-consuming and labor-intensive. Thus, automatic information extraction has become an important issue. In this study, we used the Unified Medical Language System (UMLS) to construct a hierarchical concept-based dictionary of brain functions. To the best of our knowledge, this is the first generalized dictionary of this kind. We also developed an information extraction system for recognizing, mapping and classifying terms relevant to human brain study. The precision and recall of our system was on a par with that of human experts in term recognition, term mapping and term classification. Our approach presented in this paper presents an alternative to the more laborious, manual entry approach to information extraction. PMID:19393340
Interpretation of the Hubble diagram in a nonhomogeneous universe
NASA Astrophysics Data System (ADS)
Fleury, Pierre; Dupuy, Hélène; Uzan, Jean-Philippe
2013-06-01
In the standard cosmological framework, the Hubble diagram is interpreted by assuming that the light emitted by standard candles propagates in a spatially homogeneous and isotropic spacetime. However, the light from “point sources”—such as supernovae—probes the Universe on scales where the homogeneity principle is no longer valid. Inhomogeneities are expected to induce a bias and a dispersion of the Hubble diagram. This is investigated by considering a Swiss-cheese cosmological model, which (1) is an exact solution of the Einstein field equations, (2) is strongly inhomogeneous on small scales, but (3) has the same expansion history as a strictly homogeneous and isotropic universe. By simulating Hubble diagrams in such models, we quantify the influence of inhomogeneities on the measurement of the cosmological parameters. Though significant in general, the effects reduce drastically for a universe dominated by the cosmological constant.
Generation of Finite Life Distributional Goodman Diagrams for Reliability Prediction
NASA Technical Reports Server (NTRS)
Kececioglu, D.; Guerrieri, W. N.
1971-01-01
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.
A redetermination of the succinonitrile-water phase diagram
NASA Technical Reports Server (NTRS)
Smith, J. E., Jr.; Frazier, D. O.; Kaukler, W. F.
1984-01-01
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.
O-C diagrams and period changes in stellar systems
NASA Astrophysics Data System (ADS)
Liska, J.; Skarka, M.
2015-02-01
Based on the visual inspection of all O-C diagrams available in the O-C gateway managed by the Variable stars and exoplanet section of the Czech astronomical society we present an overview of possible shapes of O-C diagrams together with discussion of possible effects causing such dependences. The nature of these effects is discussed for various types of periodic variable. We also give short remarks on interesting eclipsing systems BV Dra and BW Dra which form a visual pair and show antiparallel changes of their O-C diagrams. In addition we comment on period changes of UU Cam, and argue that it probably shows long - term Light Time Effect (LiTE) rather than sudden period change. Effects which are observable only in ultra - precise, quasi - continual measurements gathered by the Kepler satellite are discussed at the end of this contribution.
Project Management Plan for the INEL technology logic diagrams
Rudin, M.J.
1992-10-01
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.
Project Management Plan for the INEL technology logic diagrams
Rudin, M.J.
1992-10-01
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.
Influence Diagram Use With Respect to Technology Planning and Investment
NASA Technical Reports Server (NTRS)
Levack, Daniel J. H.; DeHoff, Bryan; Rhodes, Russel E.
2009-01-01
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.
Electrochemical phase diagrams for aqueous redox systems. Final report, 1 August 1986-31 July 1989
Angus, J.C.; Zappia, M.J.; Yung, R.C.
1989-12-22
A completely new phase diagram, the electron number diagram, has been developed for aqueous redox systems. The electron number diagram is a transformed potential-pH diagram in which potential is replaced by its thermodynamic conjugate, the number of electrons. The relationship between electron number diagrams and potential-pH diagrams, which provide complementary information, is explained in thermodynamic and geometric terms. Electron number diagrams show any similarities to metallurgical T-x diagrams. Because electron number is a conserved quantity, material balances can be performed on electron number diagrams, and process trajectories can be followed. The mass and electron balance equations are derived, and electron number diagrams are used to illustrate a variety of process trajectories. The diagrams are of particular value in describing the complex phase chemistry involved in aqueous corrosion, hydrometallurgical ore processing, nuclear waste disposal, geochemical processes and some fuel sulfur removal processes. A detailed thermodynamic analysis of complex aqueous redox systems was the basis for algorithms for construction of generalized chemical potential diagrams, potential-pH diagrams and electron number diagrams. Extremely efficient computer programs based on the algorithms were used to construct diagrams for a variety of systems, including the following which include two active redox elements: the aqueous U-C, Cd-Te and Ga-As systems. Extension of these algorithms to systems of arbitrary complexity is also discussed.
Size Dependent Phase Diagrams of Nickel-Carbon Nanoparticles
NASA Astrophysics Data System (ADS)
Magnin, Y.; Zappelli, A.; Amara, H.; Ducastelle, F.; Bichara, C.
2015-11-01
The carbon rich phase diagrams of nickel-carbon nanoparticles, relevant to catalysis and catalytic chemical vapor deposition synthesis of carbon nanotubes, are calculated for system sizes up to about 3 nm (807 Ni atoms). A tight binding model for interatomic interactions drives the grand canonical Monte Carlo simulations used to locate solid, core shell and liquid stability domains, as a function of size, temperature, and carbon chemical potential or concentration. Melting is favored by carbon incorporation from the nanoparticle surface, resulting in a strong relative lowering of the eutectic temperature and a phase diagram topology different from the bulk one. This should lead to a better understanding of the nanotube growth mechanisms.
THE DUALITY DIAGRAM IN DATA ANALYSIS: EXAMPLES OF MODERN APPLICATIONS.
De la Cruz, Omar; Holmes, Susan
2011-12-01
Today's data-heavy research environment requires the integration of different sources of information into structured datasets that can not be analyzed as simple matrices. We introduce an old technique, known in the European data analyses circles as the Duality Diagram Approach, put to new uses through the use of a variety of metrics and ways of combining different diagrams together. This issue of the Annals of Applied Statistics contains contemporary examples of how this approach provides solutions to hard problems in data integration. We present here the genesis of the technique and how it can be seen as a precursor of the modern kernel based approaches. PMID:22282721
A preliminary ferritic-martensitic stainless steel constitution diagram
Balmforth, M.C.; Lippold, J.C.
1998-01-01
This paper describes preliminary research to develop a constitution diagram that will more accurately predict the microstructure of ferritic and martensitic stainless steel weld deposits. A button melting technique was used to produce a wide range of compositions using mixtures of conventional ferritic and martensitic stainless steels, including types 403, 409, 410, 430, 439 and 444. These samples were prepared metallographically, and the vol-% ferrite and martensite was determined quantitatively. In addition, the hardness and ferrite number (FN) were measured. Using this data, a preliminary constitution diagram is proposed that provides a more accurate method for predicting the microstructures of arc welds in ferritic and martensitic stainless steels.
NASA Astrophysics Data System (ADS)
Gaiotto, Davide; Razamat, Shlomo S.
2015-07-01
We construct classes of superconformal theories elements of which are labeled by punctured Riemann surfaces. Degenerations of the surfaces correspond, in some cases, to weak coupling limits. Different classes are labeled by two integers ( N, k). The k = 1 case coincides with A N - 1 theories of class and simple examples of theories with k > 1 are orbifolds of some of the A N - 1 class theories. For the space of theories to be complete in an appropriate sense we find it necessary to conjecture existence of new strongly coupled SCFTs. These SCFTs when coupled to additional matter can be related by dualities to gauge theories. We discuss in detail the A 1 case with k = 2 using the supersymmetric index as our analysis tool. The index of theories in classes with k > 1 can be constructed using eigenfunctions of elliptic quantum mechanical models generalizing the Ruijsenaars-Schneider integrable model. When the elliptic curve of the model degenerates these eigenfunctions become polynomials with coefficients being algebraic expressions in fugacities, generalizing the Macdonald polynomials with rational coefficients appearing when k = 1.
Difference in hydrogen abundance between two classes of type I X-ray bursts
Ebisuzaki, T.; Nakamura, N.
1988-05-01
The hypothesis that the bright type I X-ray bursts differ from faint bursts in that a hydrogen-rich envelope is ejected in the former type and not in the latter is theoretically discussed and experimentally investigated. Color-temperature versus luminosity diagrams of X-ray bursts from MXB 1636-536 and MXB 1608-522 are constructed based on observations from the Tenma satellite and are used to study the hydrogen richness of the surface of the neutron stars resulting from the outbursts. Systematic differences between the bright and faint class diagrams are found which confirm the hypothesis. 28 references.
The difference in hydrogen abundance between two classes of type I X-ray bursts
NASA Technical Reports Server (NTRS)
Ebisuzaki, Toshikazu; Nakamura, Norio
1988-01-01
The hypothesis that the bright type I X-ray bursts differ from faint bursts in that a hydrogen-rich envelope is ejected in the former type and not in the latter is theoretically discussed and experimentally investigated. Color-temperature versus luminosity diagrams of X-ray bursts from MXB 1636-536 and MXB 1608-522 are constructed based on observations from the Tenma satellite and are used to study the hydrogen richness of the surface of the neutron stars resulting from the outbursts. Systematic differences between the bright and faint class diagrams are found which confirm the hypothesis.
NASA Astrophysics Data System (ADS)
Cerba Diaconescu, Oxana; Schlomiuk, Dana; Vulpe, Nicolae
In this article, we consider the class QSL4{u +vc+w^c, &boldsymbol; ? } of all real quadratic differential systems (dx)/(dt) = p(x, y), (dy)/(dt) = q(x, y) with gcd(p, q) = 1, having invariant lines of total multiplicity four and two complex and one real infinite singularities. We first construct compactified canonical forms for the class QSL4{u +vc+w^c, &boldsymbol; ? } so as to include limit points in the 12-dimensional parameter space of this class. We next construct the bifurcation diagrams for these compactified canonical forms. These diagrams contain many repetitions of phase portraits and we show that these are due to many symmetries under the group action. To retain the essence of the dynamics we finally construct the quotient spaces under the action of the group G = Aff(2, ?) × ?* of affine transformations and time homotheties and we place the phase portraits in these quotient spaces. The final diagrams retain only the necessary information to capture the dynamics under the motion in the parameter space as well as under this group action. We also present here necessary and sufficient conditions for an affine line to be invariant of multiplicity k for a quadratic system.
Continuing Education In-Class -1 In Class Activity
Gleixner, Stacy
Continuing Education In-Class -1 In Class Activity: Review of Semiconductor Processing SOLUTIONS We are going to talk about three main classes: metals, semiconductors, and insulators. Briefly, together generate a list of some materials in each class. Conductor Semiconductor Insulator Al Si SiO2 W Ge glass Na
Code of Federal Regulations, 2014 CFR
2014-10-01
...manufacture, importation, sale or use of Class A, Class B, Class S, and...manufacture, importation, sale or use of Class A, Class B, Class S, and...manufacture, importation, or sale in the United States of Class A, Class B, Class S,...
Code of Federal Regulations, 2013 CFR
2013-10-01
...manufacture, importation, sale or use of Class A, Class B, Class S, and...manufacture, importation, sale or use of Class A, Class B, Class S, and...manufacture, importation, or sale in the United States of Class A, Class B, Class S,...
Code of Federal Regulations, 2012 CFR
2012-10-01
...manufacture, importation, sale or use of Class A, Class B, Class S, and...manufacture, importation, sale or use of Class A, Class B, Class S, and...manufacture, importation, or sale in the United States of Class A, Class B, Class S,...
NASA Astrophysics Data System (ADS)
Banerjee, Banmali
Methods and procedures for successfully solving math word problems have been, and continue to be a mystery to many U.S. high school students. Previous studies suggest that the contextual and mathematical understanding of a word problem, along with the development of schemas and their related external representations, positively contribute to students' accomplishments when solving word problems. Some studies have examined the effects of diagramming on students' abilities to solve word problems that only involved basic arithmetic operations. Other studies have investigated how instructional models that used technology influenced students' problem solving achievements. Still other studies have used schema-based instruction involving students with learning disabilities. No study has evaluated regular high school students' achievements in solving standard math word problems using a diagramming technique without technological aid. This study evaluated students' achievement in solving math word problems using a diagramming technique. Using a quasi-experimental experimental pretest-posttest research design, quantitative data were collected from 172 grade 11 Hispanic English language learners (ELLS) and African American learners whose first language is English (EFLLs) in 18 classes at an inner city high school in Northern New Jersey. There were 88 control and 84 experimental students. The pretest and posttest of each participating student and samples of the experimental students' class assignments provided the qualitative data for the study. The data from this study exhibited that the diagramming method of solving math word problems significantly improved student achievement in the experimental group (p<.01) compared to the control group. The study demonstrated that urban, high school, ELLs benefited from instruction that placed emphasis on the mathematical vocabulary and symbols used in word problems and that both ELLs and EFLLs improved their problem solving success through careful attention to the creation and labeling of diagrams to represent the mathematics involved in standard word problems. Although Learnertype (ELL, EFLL), Classtype (Bilingual and Mixed), and Gender (Female, Male) were not significant indicators of student achievement, there was significant interaction between Treatment and Classtype at the level of the Bilingual students ( p<.01) and between Treatment and Learnertype at the level of the ELLs (p<.01).
Implementing Semantic Merging Operators using Binary Decision Diagrams
Hunter, Anthony
Implementing Semantic Merging Operators using Binary Decision Diagrams Nikos Gorogiannis- proach is to represent each source of information by a set of formulae and then use a merging operator this, we propose a methodology for implementing model-based merging operators using the notion
62. Historic propellant piping diagram of oxidant pit at Building ...
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
33. Historic photo of section diagram of Building 202, April ...
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
Energy Diagrams for Enzyme-Catalyzed Reactions: Concepts and Misconcepts
ERIC Educational Resources Information Center
Aledo, J. Carlos; Lobo, Carolina; del Valle, Alicia Esteban
2003-01-01
Despite the utility that energy diagrams have as a teaching and learning tool, a survey of their use, in seven popular Biochemistry textbooks, reveals that there is certain confusion around this topic. In our opinion, this confusion arises from the reluctance of authors to consider and indicate the conditions under which the reaction being…
A PROJECT MANAGEMENT CAUSAL LOOP DIAGRAM T. Michael Toole1
Toole, T. Michael
A PROJECT MANAGEMENT CAUSAL LOOP DIAGRAM T. Michael Toole1 Accepted for the 2005 ARCOM Conference several deficiencies in current project management analytical techniques. This paper facilitates the integration of system dynamics into project management by providing an overview of system dynamics principles
Introducing the Circular Flow Diagram to Business Students
ERIC Educational Resources Information Center
Daraban, Bogdan
2010-01-01
The circular flow of income diagram is a simplified representation of the functioning of a free-market economic system. It illustrates how businesses interact with the other economic participants within the key macroeconomic markets that coordinate the flow of income through the national economy. Therefore, it can provide students of business with…
Phase stabilities at a glance: Stability diagrams of nickel dipnictides
NASA Astrophysics Data System (ADS)
Bachhuber, F.; Rothballer, J.; Söhnel, T.; Weihrich, R.
2013-12-01
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 NiPn2 (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/CoSb2, and the NiAs2 types are highlighted by means of common structural fragments. Electronic stabilities of experimentally known and related AB2 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.
Phase Diagram for Spinning and Accreting Neutron Stars
D. Blaschke; H. Grigorian; G. Poghosyan
2002-07-14
Neutron star configurations are considered as thermodynamical systems for which a phase diagram in the angular velocity (Omega) - baryon number (N) plane is obtained with a dividing line N_{crit}(Omega) for quark core configurations. Trajectories of neutron star evolution in this diagram are studied for different scenarios defined by the external torque acting on the star due to radiation and/or mass accretion. They show a characteristic change in the rotational kinematics when the star enters the quark core regime. For isolated pulsars the braking index signal for deconfinement has been studied in its dependence on the mass of the star. Model calculations of the spin evolution of accreting low-mass X-ray binaries in the phase diagram have been performed for different values of the initial magnetic field, its decay time as well as initial mass and mass accretion rate. Population clustering of these objects at the line N_{crit}(Omega) in the phase diagram is suggested as an observable signal for the deconfinement phase transition if it exists for spinnning and accreting neutron stars.
The Role of the Diagram in Euclid's Elements Jeremy Avigad
Spirtes, Peter
The Role of the Diagram in Euclid's Elements Jeremy Avigad Department of Philosophy and Department Northrop) June, 2008 #12;The Elements For more than two thousand years, Euclid's Elements was held's formal axiomatization later on, were thought to make Euclid rigorous. #12;The Elements But in some ways
Energy Diagram for the Catalytic Decomposition of Hydrogen Peroxide
ERIC Educational Resources Information Center
Tatsuoka, Tomoyuki; Koga, Nobuyoshi
2013-01-01
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…
Using Tree Diagrams as an Assessment Tool in Statistics Education
ERIC Educational Resources Information Center
Yin, Yue
2012-01-01
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…
Software Tool Integrating Data Flow Diagrams and Petri Nets
NASA Technical Reports Server (NTRS)
Thronesbery, Carroll; Tavana, Madjid
2010-01-01
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.
Must Scientific Diagrams Be Eliminable? The Case of Path Analysis
in scientific texts. The case of path analysis, a statistical method for quantitatively assessing the relativeMust Scientific Diagrams Be Eliminable? The Case of Path Analysis JAMES R. GRIESEMER 1 Department what is supplied by linear equations, and therefore that they are ineliminable in a strong scientific
Analysis of Circuit Dynamic Behavior with Timed Ternary Decision Diagram
Chen, Deming
. Among these critical primary outputs, some may be stabilized very quickly by input vectors, even the use of timed ternary decision diagrams (tTDD) to encode stabilization conditions for POs. To compute probabilities based on a tTDD, we propose false assignment pruning and random variable compaction to preserve
75 FR 61512 - Outer Continental Shelf Official Protraction Diagrams
Federal Register 2010, 2011, 2012, 2013, 2014
2010-10-05
...THE INTERIOR Bureau of Ocean Energy Management, Regulation...Diagrams AGENCY: Bureau of Ocean Energy Management, Regulation...located within Atlantic Ocean areas, with revision...in the North Atlantic, Mid Atlantic, South Atlantic...2008 NI18-06 (Hatteras Ridge)--April 1, 2008...
Riparian Sediment Delivery Ratio: Stiff Diagrams and Artifical Neural Networks
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...
Expanding Application of the Wiggers Diagram to Teach Cardiovascular Physiology
ERIC Educational Resources Information Center
Mitchell, Jamie R.; Wang, Jiun-Jr
2014-01-01
Dr. Carl Wiggers' careful observations have provided a meaningful resource for students to learn how the heart works. Throughout the many years from his initial reports, the Wiggers diagram has been used, in various degrees of complexity, as a fundamental tool for cardiovascular instruction. Often, the various electrical and mechanical plots…
Analysing Collisions Using Minkowski Diagrams in Momentum Space
ERIC Educational Resources Information Center
Bokor, Nandor
2011-01-01
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…
Phase Diagram for Magnon Condensate in Yttrium Iron Garnet Film
Phase Diagram for Magnon Condensate in Yttrium Iron Garnet Film Fuxiang Li1 , Wayne M. Saslow1) at room temperature in films of Yttrium Iron Garnet (YIG). Unlike other quasiparticle BEC systems9 and magnons10,11 . Among these, BEC of magnons in films of Yttrium Iron Garnet (YIG), discovered by the group
USING THE HASSE DIAGRAM TECHNIQUE TO PRIORITIZE POTENTIAL PBTS
The identification of chemicals with PBT (Persistence, Bioaccumulation,Toxicity) potential is of major interest to many organizations. In the present study about 2800 commercially important chemicals are included.
Initially Hasse Diagram Technique (HDT) has been applied to...
Minimum Area Venn Diagrams Whose Curves are Polyominoes
Ruskey, Frank
and widely-translated "Letters to a German Princess" [8]. In the letters, Euler eloquently wrote about, AB, AC, BC, ABC}. If an n-Venn diagram's curves are equiva- lent to each other modulo translations lacked an aesthetic appeal. In 1989, Anthony Edwards developed an elegant method for drawing n
Minimum Area Venn Diagrams Whose Curves are Polyominoes
Ruskey, Frank
and widelytranslated ``Letters to a German Princess'' [8]. In the letters, Euler eloquently wrote about, AB,AC,BC,ABC}. If an nVenn diagram's curves are equiva lent to each other modulo translations lacked an aesthetic appeal. In 1989, Anthony Edwards developed an elegant method for drawing n
Phase diagram of colloid-rod system and Xuhui Xiao
Phase diagram of colloid-rod system S. K. Laia and Xuhui Xiao Department of Physics, Complex colloidal hard spheres and colloidal rods in its solid and liquid phases. Given these free energy density,2 ad- vanced such a semigrand ensemble theory to study the phase-separation behavior of colloidal
G404 Geobiology Abbreviations for tetrapod skull diagram
Polly, David
#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
Equations of State and Phase Diagrams of Ammonia
ERIC Educational Resources Information Center
Glasser, Leslie
2009-01-01
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…
Integrating Mathematics and Science: Ecology and Venn Diagrams
ERIC Educational Resources Information Center
Leszczynski, Eliza; Munakata, Mika; Evans, Jessica M.; Pizzigoni, Francesca
2014-01-01
Efforts to integrate mathematics and science have been widely recognized by mathematics and science educators. However, successful integration of these two important school disciplines remains a challenge. In this article, a mathematics and science activity extends the use of Venn diagrams to a life science context and then circles back to a…
Failure Assessment Diagram for Brazed 304 Stainless Steel Joints
NASA Technical Reports Server (NTRS)
Flom, Yory
2011-01-01
Interaction equations were proposed earlier to predict failure in Albemet 162 brazed joints. Present study demonstrates that the same interaction equations can be used for lower bound estimate of the failure criterion in 304 stainless steel joints brazed with silver-based filler metals as well as for construction of the Failure Assessment Diagrams (FAD).
Computer-Generated Phase Diagrams for Binary Mixtures.
ERIC Educational Resources Information Center
Jolls, Kenneth R.; And Others
1983-01-01
Computer programs that generate projections of thermodynamic phase surfaces through computer graphics were used to produce diagrams representing properties of water and steam and the pressure-volume-temperature behavior of most of the common equations of state. The program, program options emphasizing thermodynamic features of interest, and…
Phase diagram of d=4 Ising Model with two couplings
J. L. Alonso; J. M. Carmona; J. Clemente Gallardo; L. A. Fernandez; D. Iniguez; A. Tarancon; C. L. Ullod
1996-02-07
We study the phase diagram of the four dimensional Ising model with first and second neighbour couplings, specially in the antiferromagnetic region, by using Mean Field and Monte Carlo methods. From the later, all the transition lines seem to be first order except that between ferromagnetic and disordered phases in a region including the first-neighbour Ising transition point.
Penrose-Carter Diagram for a Uniformly Accelerated Observer
ERIC Educational Resources Information Center
Semay, Claude
2007-01-01
A uniformly accelerated observer can build his proper system of coordinates in a delimited sector of the flat Minkowski spacetime. The properties of the position and time coordinate lines for such an observer are studied and compared with the coordinate lines for an inertial observer in a Penrose-Carter diagram for this spacetime.
Semiempirical dynamic phase diagrams of nanocrystalline products during copper (II)
because of wide spread applications as a pure metal as well as its compounds. Ultra-fine copper particlesSemiempirical dynamic phase diagrams of nanocrystalline products during copper (II) acetylacetonate was proposed. Prevailing role of copper dimers in the processes of copper and copper (I) oxide particle growth
Cloud computing and hyperbolic Voronoi diagrams on the sphere
Pavel Bleher; Caroline Shouraboura
2012-03-13
In this work we study the minimization problem for the total distance in a cloud computing network on the sphere. We give a solution to this problem in terms of hyperbolic Voronoi diagrams on the sphere. We present results of computer simulations illustrating the solution.
Maxima and O-C Diagrams for 489 Mira Stars
NASA Astrophysics Data System (ADS)
Karlsson, T.
2013-11-01
Maxima for 489 Mira stars have been compiled. They were computed with data from AAVSO, AFOEV, VSOLJ, and BAA-VSS and collected from published maxima. The result is presented in a mysql database and on web pages with O-C diagrams, periods and some statistical information for each star.
POWER DIAGRAMS AND MORSE THEORY D. SIERSMA , M. VAN MANEN
Siersma, Dirk
POWER DIAGRAMS AND MORSE THEORY D. SIERSMA , M. VAN MANEN Abstract. We study Morse theory of the (power) distance function to a set of points in Rn . We describe the topology of the union of the corresponding set of growing balls by a Morse poset. The Morse poset is related to the power tesselation of Rn
Using Nuclear Magnetic Resonance Spectroscopy for Measuring Ternary Phase Diagrams
ERIC Educational Resources Information Center
Woodworth, Jennifer K.; Terrance, Jacob C.; Hoffmann, Markus M.
2006-01-01
A laboratory experiment is presented for the upper-level undergraduate physical chemistry curriculum in which the ternary phase diagram of water, 1-propanol and n-heptane is measured using proton nuclear magnetic resonance (NMR) spectroscopy. The experiment builds upon basic concepts of NMR spectral analysis, typically taught in the undergraduate…
Phase stabilities at a glance: Stability diagrams of nickel dipnictides
Bachhuber, F.; School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland ; Rothballer, J.; Weihrich, R.; Söhnel, T.; Centre for Theoretical Chemistry and Physics, The New Zealand Institute for Advanced Study, Massey University Auckland, Auckland
2013-12-07
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.
1 of 3 + 1 page diagram Process Engineering Thermodynamics
Zevenhoven, Ron
1 of 3 + 1 page diagram Process Engineering Thermodynamics 424304 E (4 sp) Exam 20-5-2009 All is emitted from a process stack at 1 bar, 120°C into the ambient atmosphere composed of 78.96%-vol N2 + 21 of 1) the emitted gases cooling to 20°C, and 2) the dilution to the ambient air concentration levels
The Use of Kruskal-Newton Diagrams for Differential Equations
T. Fishaleck and R.B. White
2008-02-19
The method of Kruskal-Newton diagrams for the solution of differential equations with boundary layers is shown to provide rapid intuitive understanding of layer scaling and can result in the conceptual simplification of some problems. The method is illustrated using equations arising in the theory of pattern formation and in plasma physics.
VORONOI DIAGRAMS AND ORNAMENTAL DESIGN Craig S. Kaplan
Kaplan, Craig S.
with pinpoints of different coloured bacteria. The bacteria grow outward, the radius of each one's territory receiving the colour of the first bacteria to reach it (which is simply the one that happened to be closest of placing pinpoints of bacteria on a dish, we can formalize Voronoi diagrams by beginning with a set
Visualising Knowledge from Chat Debates in Argument Diagrams
ERIC Educational Resources Information Center
Salminen, T.; Marttunen, M.; Laurinen, L.
2010-01-01
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…
ERIC Educational Resources Information Center
DeRogatis, Amy; Honerkamp, Kenneth; McDaniel, Justin; Medine, Carolyn; Nyitray, Vivian-Lee; Pearson, Thomas
2014-01-01
The editor of "Teaching Theology and Religion" facilitated this reflective conversation with five teachers who have extensive experience and success teaching extremely large classes (150 students or more). In the course of the conversation these professors exchange and analyze the effectiveness of several active learning strategies they…
Sin, Peter
will walk over together from L/S Classes or LA hours. Please gauge your time to arrive at the Amphitheater will be holding our Thanksgiving Potluck. Details will be on the Activities Board and in the next issue of The ELI Office will be closed on this day. Thanksgiving Holiday: Thursday, November 24th is Thanksgiving
Financing Class Size Reduction
ERIC Educational Resources Information Center
Achilles, C. M.
2005-01-01
Class size reduction has been shown to, among other things, improve academic achievement for all students and particularly for low-income and minority students. With the No Child Left Behind Act's heavy emphasis on scientifically based research, adequate yearly progress, and disaggregated results, one wonders why all children aren't enrolled in…
Communication, "Class," and Culture.
ERIC Educational Resources Information Center
Jeffres, Leo W.
A study was conducted to examine the relationships among communication, social class, and ethnic heritage. Eleven of thirteen ethnic groups in a Midwestern metropolitan area who had been studied in 1976 were surveyed again in late 1980 and early 1981. Groups surveyed were Irish, Greek, Czech, Italian, Lebanese, Hungarian, Lithuanian, Polish,…
ERIC Educational Resources Information Center
Beem, Kate
2010-01-01
As Internet technology encroached on the public school classroom about a decade ago, Kim Ross, superintendent of the Houston School District in Houston, Minnesota, saw an opportunity. At first, he and his administrative team simply wanted to offer students in the district of 1,300 access to more classes via the web than what a district that size…
ERIC Educational Resources Information Center
Herron-Thorpe, Farren L.; Olson, Jo Clay; Davis, Denny
2010-01-01
Toys in the classroom was the result of a National Science Foundation grant that brought two engineering graduate students to a middle school math class. The graduate students and teachers collaborated in an effort to enhance students' mathematical learning. An engineering context was theorized as a way to further develop students' understanding…