Abstract In this paper we consider the following problem: Given a set of n Playerl sites in the p... more Abstract In this paper we consider the following problem: Given a set of n Playerl sites in the plane and their Delaunay triangulation D, place minimum possible Player2 sites such that in the resulting Delaunay triangulation D'of the sites of both Players, the neighborship between Playerl sites are as less as possible. We first consider placing minimum number of Player2 sites such that no two Playerl sites are neighbors in D'.
Distributed peer-to-peer (P2P) systems are being used for more rigorous jobs now than before with... more Distributed peer-to-peer (P2P) systems are being used for more rigorous jobs now than before with new prospects and challenges. In general peer-to-peer systems are constructed on ad-hoc basis, without any centralized control over the nodes. Nodes can join and leave the network anytime. Even if we may not want any centralized control over these system, sometimes it is crucial to see if any node is creating congestion in the networks or showing errant behavior. such cases we may want to remove the node from the network.
Abstract Visualizations of static networks in the form of node-link diagrams have evolved rapidly... more Abstract Visualizations of static networks in the form of node-link diagrams have evolved rapidly, though researchers are still grappling with how best to show evolution of nodes over time in these diagrams. This paper introduces NetVisia, a social network visualization system designed to support users in exploring temporal evolution in networks by using heat maps to display node attribute changes over time.
Abstract���While visual overviews of tables of numerical and categorical data have been proposed ... more Abstract���While visual overviews of tables of numerical and categorical data have been proposed for tables with a single value per cell, it is difficult to summarize tables containing columns of distributions (eg the distributions of ages or ethnicity across counties, or the distribution of movie ratings and trust ratings in recommender systems). We present a novel way of displaying and manipulating overviews of distribution columns to reveal interesting patterns and outliers or find possible correlations between columns.
Abstract���Visual overviews of tables of numerical and categorical data have been proposed for ta... more Abstract���Visual overviews of tables of numerical and categorical data have been proposed for tables with a single value per cell. In this paper we address the problem of exploring tables including columns consisting of distributions, eg the distributions of movie ratings or trust ratings in recommender systems, age distributions in demographic data, usage distributions in logs of telephone calls etc.
ABSTRACT Community safety as a social issue has expanded its reach to web forums, portals and ded... more ABSTRACT Community safety as a social issue has expanded its reach to web forums, portals and dedicated sites. This paper presents our study of 230 community safety groups whose members communicate through the Nation of Neighbors website. We analyze the patterns of activities within these communities along with their temporal dynamics. We demonstrate both feature-based and temporal analyses of the communities aiming at discovering the characteristics that make such communities successful.
Trillions of dollars are spent each year on health care. The US Department of Health and Human Se... more Trillions of dollars are spent each year on health care. The US Department of Health and Human Services keeps track of a variety of health care indicators across the country, resulting in a large geospatially multivariate data set. Current visualization tools for such data sets make it difficult to make multivariate comparisons and show the geographic distribution of the selected variables at the same time.
Information visualization is a powerful tool for analyzing the dynamic nature of social communiti... more Information visualization is a powerful tool for analyzing the dynamic nature of social communities. Using Nation of Neighbors community network as a testbed, we propose five principles of implementing temporal visualizations for social networks and present two research prototypes: NodeXL and TempoVis. Three different states are defined in order to visualize the temporal changes of social networks.
Abstract There are a growing number of machine learning algorithms which operate on graphs. Examp... more Abstract There are a growing number of machine learning algorithms which operate on graphs. Example applications for these algorithms include predicting which customers will recommend products to their friends in a viral marketing campaign using a customer network, predicting the topics of publications in a citation network, or predicting the political affiliations of people in a social network. It is important for an analyst to have tools to help compare the output of these machine learning algorithms.
Abstract���Social-media-supported academic conferences are becoming increasingly global as people... more Abstract���Social-media-supported academic conferences are becoming increasingly global as people anywhere can participate actively through backchannel conversation. It can be challenging for the conference organizers to integrate the use of social media, to take advantage of the connections between backchannel and front stage, and to encourage the participants to be a part of the broader discussion occurring through social media.
Abstract The VAST 2010 minichallenge 3 dataset scenario contains a set of genetic sequences from ... more Abstract The VAST 2010 minichallenge 3 dataset scenario contains a set of genetic sequences from a hypothetical disease outbreak. We describe how we used AC, a plagiarism detection tool, to find the gene sequence similarity; and ManyNets, a network analysis tool, to trace back the gene-mutations and identify the characteristics of the sequences. Our analysis won the Innovative Tool Adaptation award.
Abstract In this paper we consider the following problem: Given a set of n Playerl sites in the p... more Abstract In this paper we consider the following problem: Given a set of n Playerl sites in the plane and their Delaunay triangulation D, place minimum possible Player2 sites such that in the resulting Delaunay triangulation D'of the sites of both Players, the neighborship between Playerl sites are as less as possible. We first consider placing minimum number of Player2 sites such that no two Playerl sites are neighbors in D'.
Distributed peer-to-peer (P2P) systems are being used for more rigorous jobs now than before with... more Distributed peer-to-peer (P2P) systems are being used for more rigorous jobs now than before with new prospects and challenges. In general peer-to-peer systems are constructed on ad-hoc basis, without any centralized control over the nodes. Nodes can join and leave the network anytime. Even if we may not want any centralized control over these system, sometimes it is crucial to see if any node is creating congestion in the networks or showing errant behavior. such cases we may want to remove the node from the network.
Abstract Visualizations of static networks in the form of node-link diagrams have evolved rapidly... more Abstract Visualizations of static networks in the form of node-link diagrams have evolved rapidly, though researchers are still grappling with how best to show evolution of nodes over time in these diagrams. This paper introduces NetVisia, a social network visualization system designed to support users in exploring temporal evolution in networks by using heat maps to display node attribute changes over time.
Abstract���While visual overviews of tables of numerical and categorical data have been proposed ... more Abstract���While visual overviews of tables of numerical and categorical data have been proposed for tables with a single value per cell, it is difficult to summarize tables containing columns of distributions (eg the distributions of ages or ethnicity across counties, or the distribution of movie ratings and trust ratings in recommender systems). We present a novel way of displaying and manipulating overviews of distribution columns to reveal interesting patterns and outliers or find possible correlations between columns.
Abstract���Visual overviews of tables of numerical and categorical data have been proposed for ta... more Abstract���Visual overviews of tables of numerical and categorical data have been proposed for tables with a single value per cell. In this paper we address the problem of exploring tables including columns consisting of distributions, eg the distributions of movie ratings or trust ratings in recommender systems, age distributions in demographic data, usage distributions in logs of telephone calls etc.
ABSTRACT Community safety as a social issue has expanded its reach to web forums, portals and ded... more ABSTRACT Community safety as a social issue has expanded its reach to web forums, portals and dedicated sites. This paper presents our study of 230 community safety groups whose members communicate through the Nation of Neighbors website. We analyze the patterns of activities within these communities along with their temporal dynamics. We demonstrate both feature-based and temporal analyses of the communities aiming at discovering the characteristics that make such communities successful.
Trillions of dollars are spent each year on health care. The US Department of Health and Human Se... more Trillions of dollars are spent each year on health care. The US Department of Health and Human Services keeps track of a variety of health care indicators across the country, resulting in a large geospatially multivariate data set. Current visualization tools for such data sets make it difficult to make multivariate comparisons and show the geographic distribution of the selected variables at the same time.
Information visualization is a powerful tool for analyzing the dynamic nature of social communiti... more Information visualization is a powerful tool for analyzing the dynamic nature of social communities. Using Nation of Neighbors community network as a testbed, we propose five principles of implementing temporal visualizations for social networks and present two research prototypes: NodeXL and TempoVis. Three different states are defined in order to visualize the temporal changes of social networks.
Abstract There are a growing number of machine learning algorithms which operate on graphs. Examp... more Abstract There are a growing number of machine learning algorithms which operate on graphs. Example applications for these algorithms include predicting which customers will recommend products to their friends in a viral marketing campaign using a customer network, predicting the topics of publications in a citation network, or predicting the political affiliations of people in a social network. It is important for an analyst to have tools to help compare the output of these machine learning algorithms.
Abstract���Social-media-supported academic conferences are becoming increasingly global as people... more Abstract���Social-media-supported academic conferences are becoming increasingly global as people anywhere can participate actively through backchannel conversation. It can be challenging for the conference organizers to integrate the use of social media, to take advantage of the connections between backchannel and front stage, and to encourage the participants to be a part of the broader discussion occurring through social media.
Abstract The VAST 2010 minichallenge 3 dataset scenario contains a set of genetic sequences from ... more Abstract The VAST 2010 minichallenge 3 dataset scenario contains a set of genetic sequences from a hypothetical disease outbreak. We describe how we used AC, a plagiarism detection tool, to find the gene sequence similarity; and ManyNets, a network analysis tool, to trace back the gene-mutations and identify the characteristics of the sequences. Our analysis won the Innovative Tool Adaptation award.
Uploads