The Experts below are selected from a list of 135 Experts worldwide ranked by ideXlab platform
Gordon Woodhull - One of the best experts on this subject based on the ideXlab platform.
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graphviz and Dynagraph static and dynamic graph drawing tools
Graph Drawing, 2004Co-Authors: John C. Ellson, Stephen C. North, Emden R. Gansner, Eleftherios Koutsofios, Gordon WoodhullAbstract:Graphviz is a collection of software for viewing and manipulating abstract graphs. It provides graph visualization for tools and web sites in domains such as software engineering, networking, databases, knowledge representation, and bioinformatics. Hundreds of thousands of copies have been distributed under an open source license.
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Graph Drawing Software - Graphviz and Dynagraph — Static and Dynamic Graph Drawing Tools
Graph Drawing Software, 2004Co-Authors: John C. Ellson, Stephen C. North, Emden R. Gansner, Eleftherios Koutsofios, Gordon WoodhullAbstract:Graphviz is a collection of software for viewing and manipulating abstract graphs. It provides graph visualization for tools and web sites in domains such as software engineering, networking, databases, knowledge representation, and bioinformatics. Hundreds of thousands of copies have been distributed under an open source license.
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Graphviz and Dynagraph – static and dynamic graph drawing tools
Springer-Verlag, 2003Co-Authors: John Ellson, Stephen C. North, Emden R. Gansner, Eleftherios Koutsofios, Gordon WoodhullAbstract:Graphviz is a collection of software for viewing and manipulating abstract graphs. It provides graph visualization for tools and web sites in domains such as software engineering, networking, databases, knowledge representation, and bio-informatics. Hundreds of thousands of copies have been distributed under an open source license. The core of Graphviz consists of implementations of various common types of graph layout. These layouts can be used via a C library interface, streambased command line tools, graphical user interfaces and web browsers. Aspects which distinguish the software include a retention of stream-based interfaces in conjunction with a variety of tools for graph manipulation, and support for a wide assortment of graphical features and output formats. The former makes it possible to write high-level programs for querying, modifying and displaying graphs. The latter allows Graphviz to be useful in a wide range of areas, with applications far removed from academic exercises. The algorithms of Graphviz concentrate on static layouts. Dynagraph is a sibling of Graphviz, with algorithms and interactive programs for incremental layout. At the library level, it provides an object-oriented interface for graphs and graph algorithms
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Graph Drawing - Graphviz: Open source graph drawing tools
Graph Drawing, 2002Co-Authors: John C. Ellson, Stephen C. North, Emden R. Gansner, Lefteris Koutsofios, Gordon WoodhullAbstract:Graphviz is a heterogeneous collection of graph drawing tools containing batch layout programs (dot, neato, fdp, twopi); a platform for incremental layout (Dynagraph); customizable graph editors (dotty, Grappa); a server for including graphs in Web pages (WebDot); support for graphs as COM objects (Montage); utility programs useful in graph visualization; and libraries for attributed graphs. The software is available under an Open Source license. The article[1] provides a detailed description of the package.
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Graphviz — open source graph drawing tools
Springer-Verlag, 2001Co-Authors: John Ellson, Emden R. Gansner, Lefteris Koutsofios, Gordon Woodhull, Stephen North, Short Description, Lucent TechnologiesAbstract:Graphviz is a heterogeneous collection of graph drawing tools containing batch layout programs (dot, neato, fdp, twopi); a platform for incremental layout (Dynagraph); customizable graph editors (dotty, Grappa); a server for including graphs in Web pages (WebDot); support for graphs as COM objects (Montage); utility programs useful in graph visualization; and libraries for attributed graphs. The software is available under an Open Source license. The article[1] provides a detailed description of the package. The Graphviz software began with a precursor of dot in 1988, followed by neato in the early 90’s. The features expanded greatly over the years, driven by user request. Graphviz became Open Source in 2000, and was recently distributed on about 500,000 CDROMs as an add-on package for the SUSE Linux release, and is redistributed by Debian, Mandrake, SourceForge, and soon OpenBSD. 2 Areas of Application Thanks to the variety of components available and its open, “toolkit ” design, Graphviz supports a wide variety of applications. The foremost application is probably presentation layouts, such as including graphs in papers. As stream processors, the Graphviz tools can be used as co-processes with interactive components to provide dynamic layouts for debuggers, process monitors, program analysis software, etc. Graphviz tools have been adopted as a visualization service by the W3C Resource Description Framewor
Jose Francisco Dos Santos Correa - One of the best experts on this subject based on the ideXlab platform.
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Sistema inteligente para aplicações de soluções ao bombeamento mecanico de petroleo
2017Co-Authors: Jose Francisco Dos Santos CorreaAbstract:Resumo: o presente trabalho apresenta proposta de um sistema inteligente para a análise e apresentação de soluções a serem aplicadas em poços equipados com bombeamento mecânico. Este sistema engloba o tratamento de dados contidos em base de dados, a identificação de sintomas através de agentes especializados, a análise do conjunto de sintomas e a proposta de ações no sentido de corrigir problemas e otimizar o sistema bombeamento mecânico. Conceitos de engenharia de petróleo como dimensionamento e verificação do sistema de bombeamento mecânico, análise Nodal , cálculo da carta dinamométrica de fundo, fluxo multifásico, propriedades dos fluidos, "Inflow Performance Relationship", Interferência de Gás, dentre outros, foram incorporados ao sistema e integrados por agentes inteligentes desenvolvidos a partir de conceitos de Inteligência Artificial, tais como, sistemas distribuidos, redes neurais simbólicas e lógica nebulosa. o "Sistema Inteligente para Análise de Cartas Dinamométricas", atualmente em desenvolvimento através de convênio entre a PETROBRÁS e UNICAMP, tem seu campo de atuação ampliado pelo presente trabalho, através da incorporação dos conceitos citadosAbstract: This work presents a proposal for a Sucker Rod Pumping Analysis Expert System, with the main characteristic of presentating diagnostics and solutions to sucker rod pumping problems. The system includes database treatment, syntoms identification, diagnosis and solutions proposals, performed by a group of agents specialized in sucker rod pumping problems solution and otimization. Artificial Inteligence concepts such as distribuited systems, neural nets and fuzzy logic, as long as Petroleum Engineering concepts such as design and verification of sucker rod pumping, nodal analysis, and pump Dynagraph are used by the inteligent agents to broadly analyse the sucker rod pumping system. The use of the above concepts in this work, enlarges the PETROBRÁS UNICAMP project "Sistema Inteligente para análise de Cartas Dinamométricas" scope in the treatment of sucker rod pumping problem
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Sistema inteligente para aplicações de soluções ao bombeamento mecanico de petroleo
Universidade Estadual de Campinas. Faculdade de Engenharia Mecânica e Instituto de Geociências, 1995Co-Authors: Jose Francisco Dos Santos CorreaAbstract:o presente trabalho apresenta proposta de um sistema inteligente para a análise e apresentação de soluções a serem aplicadas em poços equipados com bombeamento mecânico. Este sistema engloba o tratamento de dados contidos em base de dados, a identificação de sintomas através de agentes especializados, a análise do conjunto de sintomas e a proposta de ações no sentido de corrigir problemas e otimizar o sistema bombeamento mecânico. Conceitos de engenharia de petróleo como dimensionamento e verificação do sistema de bombeamento mecânico, análise Nodal , cálculo da carta dinamométrica de fundo, fluxo multifásico, propriedades dos fluidos, "Inflow Performance Relationship", Interferência de Gás, dentre outros, foram incorporados ao sistema e integrados por agentes inteligentes desenvolvidos a partir de conceitos de Inteligência Artificial, tais como, sistemas distribuidos, redes neurais simbólicas e lógica nebulosa. o "Sistema Inteligente para Análise de Cartas Dinamométricas", atualmente em desenvolvimento através de convênio entre a PETROBRÁS e UNICAMP, tem seu campo de atuação ampliado pelo presente trabalho, através da incorporação dos conceitos citadosThis work presents a proposal for a Sucker Rod Pumping Analysis Expert System, with the main characteristic of presentating diagnostics and solutions to sucker rod pumping problems. The system includes database treatment, syntoms identification, diagnosis and solutions proposals, performed by a group of agents specialized in sucker rod pumping problems solution and otimization. Artificial Inteligence concepts such as distribuited systems, neural nets and fuzzy logic, as long as Petroleum Engineering concepts such as design and verification of sucker rod pumping, nodal analysis, and pump Dynagraph are used by the inteligent agents to broadly analyse the sucker rod pumping system. The use of the above concepts in this work, enlarges the PETROBRÁS UNICAMP project "Sistema Inteligente para análise de Cartas Dinamométricas" scope in the treatment of sucker rod pumping problem
Stephen C. North - One of the best experts on this subject based on the ideXlab platform.
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graphviz and Dynagraph static and dynamic graph drawing tools
Graph Drawing, 2004Co-Authors: John C. Ellson, Stephen C. North, Emden R. Gansner, Eleftherios Koutsofios, Gordon WoodhullAbstract:Graphviz is a collection of software for viewing and manipulating abstract graphs. It provides graph visualization for tools and web sites in domains such as software engineering, networking, databases, knowledge representation, and bioinformatics. Hundreds of thousands of copies have been distributed under an open source license.
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Graph Drawing Software - Graphviz and Dynagraph — Static and Dynamic Graph Drawing Tools
Graph Drawing Software, 2004Co-Authors: John C. Ellson, Stephen C. North, Emden R. Gansner, Eleftherios Koutsofios, Gordon WoodhullAbstract:Graphviz is a collection of software for viewing and manipulating abstract graphs. It provides graph visualization for tools and web sites in domains such as software engineering, networking, databases, knowledge representation, and bioinformatics. Hundreds of thousands of copies have been distributed under an open source license.
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Graphviz and Dynagraph – static and dynamic graph drawing tools
Springer-Verlag, 2003Co-Authors: John Ellson, Stephen C. North, Emden R. Gansner, Eleftherios Koutsofios, Gordon WoodhullAbstract:Graphviz is a collection of software for viewing and manipulating abstract graphs. It provides graph visualization for tools and web sites in domains such as software engineering, networking, databases, knowledge representation, and bio-informatics. Hundreds of thousands of copies have been distributed under an open source license. The core of Graphviz consists of implementations of various common types of graph layout. These layouts can be used via a C library interface, streambased command line tools, graphical user interfaces and web browsers. Aspects which distinguish the software include a retention of stream-based interfaces in conjunction with a variety of tools for graph manipulation, and support for a wide assortment of graphical features and output formats. The former makes it possible to write high-level programs for querying, modifying and displaying graphs. The latter allows Graphviz to be useful in a wide range of areas, with applications far removed from academic exercises. The algorithms of Graphviz concentrate on static layouts. Dynagraph is a sibling of Graphviz, with algorithms and interactive programs for incremental layout. At the library level, it provides an object-oriented interface for graphs and graph algorithms
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Graph Drawing - Graphviz: Open source graph drawing tools
Graph Drawing, 2002Co-Authors: John C. Ellson, Stephen C. North, Emden R. Gansner, Lefteris Koutsofios, Gordon WoodhullAbstract:Graphviz is a heterogeneous collection of graph drawing tools containing batch layout programs (dot, neato, fdp, twopi); a platform for incremental layout (Dynagraph); customizable graph editors (dotty, Grappa); a server for including graphs in Web pages (WebDot); support for graphs as COM objects (Montage); utility programs useful in graph visualization; and libraries for attributed graphs. The software is available under an Open Source license. The article[1] provides a detailed description of the package.
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Incremental Layout in DynaDAG
Springer-Verlag, 1996Co-Authors: Stephen C. NorthAbstract:Abstract. Generating incrementally stable layouts is important for visualizing dynamic graphs in many applications. This paper describes DynaDAG, a new heuristic for incremental layout of directed acyclic graphs drawn as hierarchies, and its application in the Dynagraph system.
Anna Baccaglini-frank - One of the best experts on this subject based on the ideXlab platform.
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From Experiences in a Dynamic Environment to Written Narratives on Functions
Digital Experiences in Mathematics Education, 2020Co-Authors: Samuele Antonini, Anna Baccaglini-frank, Giulia LisarelliAbstract:This study focusses on high school students’ written discourse about their experiences in a dynamic interactive digital environment in which functions were represented in one dimension, as Dynagraphs , that are digital artifacts in which the independent variable can be acted upon and its movement causes the variation of the dependent variable. After the introduction of the notion of Dynamic Interactive Mediators within the theory of Commognition, we analyze and classify students’ written productions describing their experience with the Dynagraphs. We present this classification as a tool of analysis that allows us to gain insight into how their writing reflects the temporal and dynamic dimensions of their experience with the Dynagraphs. This tool is used to analyze 11 excerpts; finally, epistemological, cognitive and didactic implications of this tool are discussed.
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Capturing ‘time’: characteristics of students’ written discourse on Dynagraphs
ERME, 2019Co-Authors: Lisarelli Giulia, Samuele Antonini, Anna Baccaglini-frankAbstract:International audienceWe study high school students’ written discourse about an experience in a dynamic interactive digital environment in which functions were represented in one dimension, as Dynagraphs. In a Dynagraph of a real function one variable can be acted upon while the other varies as a consequence of the movement induced on the independent variable. Students were asked to write about their experience with the Dynagraphs, and their written productions were collected and analyzed using a classification, that emerged a posteriori, in “snapshots, live-photos and scenes”. This classification is presented as a tool of analysis that allows to put discourse about Dynagraphs in relation with discourse about functions. Examples of excerpts analyzed through this tool are given
Giulia Lisarelli - One of the best experts on this subject based on the ideXlab platform.
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From Experiences in a Dynamic Environment to Written Narratives on Functions
Digital Experiences in Mathematics Education, 2020Co-Authors: Samuele Antonini, Anna Baccaglini-frank, Giulia LisarelliAbstract:This study focusses on high school students’ written discourse about their experiences in a dynamic interactive digital environment in which functions were represented in one dimension, as Dynagraphs , that are digital artifacts in which the independent variable can be acted upon and its movement causes the variation of the dependent variable. After the introduction of the notion of Dynamic Interactive Mediators within the theory of Commognition, we analyze and classify students’ written productions describing their experience with the Dynagraphs. We present this classification as a tool of analysis that allows us to gain insight into how their writing reflects the temporal and dynamic dimensions of their experience with the Dynagraphs. This tool is used to analyze 11 excerpts; finally, epistemological, cognitive and didactic implications of this tool are discussed.
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Capturing ‘time’: characteristics of students’ written discourse on Dynagraphs
2019Co-Authors: Giulia Lisarelli, Antonini Samuele, Baccaglini-frank AnnaAbstract:We study high school students’ written discourse about an experience in a dynamic interactive digital environment in which functions were represented in one dimension, as Dynagraphs. In a Dynagraph of a real function one variable can be acted upon while the other varies as a consequence of the movement induced on the independent variable. Students were asked to write about their experience with the Dynagraphs, and their written productions were collected and analyzed using a classification, that emerged a posteriori, in “snapshots, live-photos and scenes”. This classification is presented as a tool of analysis that allows to put discourse about Dynagraphs in relation with discourse about functions. Examples of excerpts analyzed through this tool are given.
