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Displaying 1-36 out of 36 total
Visual Analytics for Multimodal Social Network Analysis: A Design Study with Social Scientists
Found in: IEEE Transactions on Visualization and Computer Graphics
By Sohaib Ghani,Bum Chul Kwon,Seungyoon Lee,Ji Soo Yi,Niklas Elmqvist
Issue Date:December 2013
pp. 2032-2041
Social network analysis (SNA) is becoming increasingly concerned not only with actors and their relations, but also with distinguishing between different types of such entities. For example, social scientists may want to investigate asymmetric relations in...
 
Ubiquitous Analytics: Interacting with Big Data Anywhere, Anytime
Found in: Computer
By Niklas Elmqvist,Pourang Irani
Issue Date:April 2013
pp. 86-89
Ubilytics amplifies human cognition by embedding analytical processes into the physical environment to make sense of big data anywhere, anytime.
 
Spatial Text Visualization Using Automatic Typographic Maps
Found in: IEEE Transactions on Visualization and Computer Graphics
By Shehzad Afzal,Ross Maciejewski,Yun Jang,Niklas Elmqvist,David S. Ebert
Issue Date:December 2012
pp. 2556-2564
We present a method for automatically building typographic maps that merge text and spatial data into a visual representation where text alone forms the graphical features. We further show how to use this approach to visualize spatial data such as traffic ...
 
Graphical Perception of Multiple Time Series
Found in: IEEE Transactions on Visualization and Computer Graphics
By Waqas Javed, Bryan McDonnel, Niklas Elmqvist
Issue Date:November 2010
pp. 927-934
Line graphs have been the visualization of choice for temporal data ever since the days of William Playfair (1759-1823), but realistic temporal analysis tasks often include multiple simultaneous time series. In this work, we explore user performance for co...
 
Towards Utilizing GPUs in Information Visualization: A Model and Implementation of Image-Space Operations
Found in: IEEE Transactions on Visualization and Computer Graphics
By Bryan McDonnel, Niklas Elmqvist
Issue Date:November 2009
pp. 1105-1112
Modern programmable GPUs represent a vast potential in terms of performance and visual flexibility for information visualization research, but surprisingly few applications even begin to utilize this potential. In this paper, we conjecture that this may be...
 
Rolling the Dice: Multidimensional Visual Exploration using Scatterplot Matrix Navigation
Found in: IEEE Transactions on Visualization and Computer Graphics
By Niklas Elmqvist, Pierre Dragicevic, Jean-Daniel Fekete
Issue Date:November 2008
pp. 1141-1148
Scatterplots remain one of the most popular and widely-used visual representations for multidimensional data due to their simplicity, familiarity and visual clarity, even if they lack some of the flexibility and visual expressiveness of newer multidimensio...
 
A Taxonomy of 3D Occlusion Management Techniques
Found in: Virtual Reality Conference, IEEE
By Niklas Elmqvist, Philippas Tsigas
Issue Date:March 2007
pp. 51-58
While an important factor in depth perception, the occlusion effect in 3D environments also has a detrimental impact on tasks involving discovery, access, and spatial relation of objects in a 3D visualization. A number of interactive techniques have been d...
 
A Mobile Visual Analytics Approach for Law Enforcement Situation Awareness
Found in: 2014 IEEE Pacific Visualization Symposium (PacificVis)
By Ahmad M. M. Razip,Abish Malik,Shehzad Afzal,Matthew Potrawski,Ross Maciejewski, Yun Jang,Niklas Elmqvist,David S. Ebert
Issue Date:March 2014
pp. 169-176
The advent of modern smart phones and handheld devices has given analysts, decision-makers, and even the general public the ability to rapidly ingest data and translate it into actionable information on-the-go. In this paper, we explore the design and use ...
 
A correlative analysis process in a visual analytics environment
Found in: 2012 IEEE Conference on Visual Analytics Science and Technology (VAST)
By Abish Malik,Ross Maciejewski,Niklas Elmqvist,Yun Jang,David S. Ebert,Whitney Huang
Issue Date:October 2012
pp. 33-42
Finding patterns and trends in spatial and temporal datasets has been a long studied problem in statistics and different domains of science. This paper presents a visual analytics approach for the interactive exploration and analysis of spatiotemporal corr...
 
Portfolio Mining
Found in: Computer
By Krishna P.C. Madhavan,Mihaela Vorvoreanu,Niklas Elmqvist,Aditya Johri,Naren Ramakrishnan,G. Alan Wang,Ann McKenna
Issue Date:October 2012
pp. 95-99
Portfolio mining facilitates the creation of actionable knowledge, catalyzes innovations, and sustains research communities.
 
Exploring the design space of composite visualization
Found in: Visualization Symposium, IEEE Pacific
By Waqas Javed,Niklas Elmqvist
Issue Date:March 2012
pp. 1-8
We propose the notion of composite visualization views (CVVs) as a theoretical model that unifies the existing coordinated multiple views (CMV) paradigm with other strategies for combining visual representations in the same geometrical space. We identify f...
 
Color Lens: Adaptive Color Scale Optimization for Visual Exploration
Found in: IEEE Transactions on Visualization and Computer Graphics
By Niklas Elmqvist, Pierre Dragicevic, Jean-Daniel Fekete
Issue Date:June 2011
pp. 795-807
Visualization applications routinely map quantitative attributes to color using color scales. Although color is an effective visualization channel, it is limited by both display hardware and the human visual system. We propose a new interaction technique t...
 
Hierarchical Aggregation for Information Visualization: Overview, Techniques, and Design Guidelines
Found in: IEEE Transactions on Visualization and Computer Graphics
By Niklas Elmqvist, Jean-Daniel Fekete
Issue Date:May 2010
pp. 439-454
We present a model for building, visualizing, and interacting with multiscale representations of information visualization techniques using hierarchical aggregation. The motivation for this work is to make visual representations more visually scalable and ...
 
Mélange: Space Folding for Visual Exploration
Found in: IEEE Transactions on Visualization and Computer Graphics
By Niklas Elmqvist, Yann Riche, Nathalie Henry-Riche, Jean-Daniel Fekete
Issue Date:May 2010
pp. 468-483
Navigating in large geometric spaces—such as maps, social networks, or long documents—typically requires a sequence of pan and zoom actions. However, this strategy is often ineffective and cumbersome, especially when trying to study and compare several dis...
 
A Taxonomy of 3D Occlusion Management for Visualization
Found in: IEEE Transactions on Visualization and Computer Graphics
By Niklas Elmqvist, Philippas Tsigas
Issue Date:September 2008
pp. 1095-1109
While an important factor in depth perception, the occlusion effect in 3D environments also has a detrimental impact on tasks involving discovery, access, and spatial relation of objects in a 3D visualization. A number of interactive techniques have been d...
 
DataMeadow: A Visual Canvas for Analysis of Large-Scale Multivariate Data
Found in: Symposium On Visual Analytics Science And Technology
By Niklas Elmqvist, John Stasko, Philippas Tsigas
Issue Date:November 2007
pp. 187-194
Supporting visual analytics of multiple large-scale multidimensional datasets requires a high degree of interactivity and user control beyond the conventional challenges of visualizing such datasets. We present the DataMeadow, a visual canvas providing ric...
 
Causality Visualization Using Animated Growing Polygons
Found in: Information Visualization, IEEE Symposium on
By Niklas Elmqvist, Philippas Tsigas
Issue Date:October 2003
pp. 24
We present Growing Polygons, a novel visualization technique for the graphical representation of causal relations and information flow in a system of interacting processes. Using this method, individual processes are displayed as partitioned polygons with ...
 
WordBridge: Using Composite Tag Clouds in Node-Link Diagrams for Visualizing Content and Relations in Text Corpora
Found in: Hawaii International Conference on System Sciences
By KyungTae Kim, Sungahn Ko, Niklas Elmqvist, David S. Ebert
Issue Date:January 2011
pp. 1-8
We introduce WordBridge, a novel graph-based visualization technique for showing relationships between entities in text corpora. The technique is a node-link visualization where both nodes and links are tag clouds. Using these tag clouds, WordBridge can re...
   
VASA: Interactive Computational Steering of Large Asynchronous Simulation Pipelines for Societal Infrastructure
Found in: IEEE Transactions on Visualization and Computer Graphics
By Sungahn Ko,Jieqiong Zhao,Jing Xia,Shehzad Afzal,Xiaoyu Wang,Greg Abram,Niklas Elmqvist,Len Kne,David Van Riper,Kelly Gaither,Shaun Kennedy,William Tolone,William Ribarsky,David S. Ebert
Issue Date:February 2015
pp. 1
We present VASA, a visual analytics platform consisting of a desktop application, a component model, and a suite of distributed simulation components for modeling the impact of societal threats such as weather, food contamination, and traffic on critical i...
 
Munin: A Peer-to-Peer Middleware for Ubiquitous Analytics and Visualization Spaces
Found in: IEEE Transactions on Visualization and Computer Graphics
By Sriram Karthik Badam,Eli Fisher,Niklas Elmqvist
Issue Date:July 2014
pp. 1
We present Munin, a software framework for building ubiquitous analytics environments consisting of multiple input and output surfaces, such as tabletop displays, wall-mounted displays, and mobile devices. Munin utilizes a service-based model where each de...
 
Visual Analytics for Multimodal Social Network Analysis: A Design Study with Social Scientists
Found in: IEEE Transactions on Visualization and Computer Graphics
By Sohaib Ghani, Bum Chul Kwon, Seungyoon Lee, Ji Soo Yi,Niklas Elmqvist
Issue Date:December 2013
pp. 2032-2041
Social network analysis (SNA) is becoming increasingly concerned not only with actors and their relations, but also with distinguishing between different types of such entities. For example, social scientists may want to investigate asymmetric relations in...
 
Leveraging Multidisciplinarity in a Visual Analytics Graduate Course
Found in: IEEE Computer Graphics and Applications
By Niklas Elmqvist,D. S. Ebert
Issue Date:May 2012
pp. 84-87
Demand is growing in engineering, business, science, research, and industry for students with visual analytics expertise. However, teaching VA is challenging owing to the multidisciplinary nature of the topic, students' diverse backgrounds, and the corresp...
 
Branch-explore-merge: facilitating real-time revision control in collaborative visual exploration
Found in: Proceedings of the 2012 ACM international conference on Interactive tabletops and surfaces (ITS '12)
By Brian Bowman, David McCallum, Juan David Hincapié-Ramos, Niklas Elmqvist, Pourang Irani, Will McGrath
Issue Date:November 2012
pp. 235-244
Collaborative work is characterized by participants seamlessly transitioning from working together (coupled) to working alone (decoupled). Groupware should therefore facilitate smoothly varying coupling throughout the entire collaborative session. Towards ...
     
Patterns for visualization evaluation
Found in: Proceedings of the 2012 BELIV Workshop: Beyond Time and Errors - Novel Evaluation Methods for Visualization (BELIV '12)
By Ji Soo Yi, Niklas Elmqvist
Issue Date:October 2012
pp. 1-8
We propose a patterns-based approach to evaluating data visualization: a set of general and reusable solutions to commonly occurring problems in evaluating tools, techniques, and systems for visual sensemaking. Patterns have had significant impact in a wid...
     
Extended multitouch: recovering touch posture and differentiating users using a depth camera
Found in: Proceedings of the 25th annual ACM symposium on User interface software and technology (UIST '12)
By Karthik Ramani, Kenrick Vinayak, Niklas Elmqvist, Sundar Murugappan
Issue Date:October 2012
pp. 487-496
Multitouch surfaces are becoming prevalent, but most existing technologies are only capable of detecting the user's actual points of contact on the surface and not the identity, posture, and handedness of the user. In this paper, we define the concept of e...
     
Applying mobile device soft keyboards to collaborative multitouch tabletop displays: design and evaluation
Found in: Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces (ITS '11)
By KyungTae Kim, Niklas Elmqvist, Sungahn Ko, Tejas Kulkarni
Issue Date:November 2011
pp. 130-139
We present an evaluation of text entry methods for tabletop displays given small display space allocations, an increasingly important design constraint as tabletops become collaborative platforms. Small space is already a requirement of mobile text entry m...
     
Temporal distortion for animated transitions
Found in: Proceedings of the 2011 annual conference on Human factors in computing systems (CHI '11)
By Anastasia Bezerianos, Jean-Daniel Fekete, Niklas Elmqvist, Pierre Dragicevic, Waqas Javed
Issue Date:May 2011
pp. 2009-2018
Animated transitions are popular in many visual applications but they can be difficult to follow, especially when many objects move at the same time. One informal design guideline for creating effective animated transitions has long been the use of slow-in...
     
Direct manipulation through surrogate objects
Found in: Proceedings of the 2011 annual conference on Human factors in computing systems (CHI '11)
By Bum chul Kwon, Ji Soo Yi, Niklas Elmqvist, Waqas Javed
Issue Date:May 2011
pp. 627-636
Direct manipulation has had major influence on interface design since it was proposed by Shneiderman in 1982. Although directness generally benefits users, direct manipulation also has weaknesses. In some cases, such as when a user needs to manipulate smal...
     
Motion-pointing: target selection using elliptical motions
Found in: Proceedings of the 27th international conference on Human factors in computing systems (CHI '09)
By Jean-Daniel Fekete, Niklas Elmqvist, Yves Guiard
Issue Date:April 2009
pp. 1-4
We present a novel method called motion-pointing for selecting a set of visual items such as push-buttons without actually pointing to them. Instead, each potential target displays a rhythmically animated point we call the driver. To select a specific item...
     
Evaluating motion constraints for 3D wayfinding in immersive and desktop virtual environments
Found in: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems (CHI '08)
By Mihail Eduard Tudoreanu, Niklas Elmqvist, Philippas Tsigas
Issue Date:April 2008
pp. 49-54
Motion constraints providing guidance for 3D navigation have recently been suggested as a way of offloading some of the cognitive effort of traversing complex 3D environments on a computer. We present findings from an evaluation of the benefits of this pra...
     
Melange: space folding for multi-focus interaction
Found in: Proceeding of the twenty-sixth annual SIGCHI conference on Human factors in computing systems (CHI '08)
By Jean-Daniel Fekete, Nathalie Henry, Niklas Elmqvist, Yann Ri he
Issue Date:April 2008
pp. 49-54
Interaction and navigation in large geometric spaces typically require a sequence of pan and zoom actions. This strategy is often ineffective and cumbersome, especially when trying to study several distant objects. We propose a new distortion technique tha...
     
Evaluating the effectiveness of occlusion reduction techniques for 3D virtual environments
Found in: Proceedings of the ACM symposium on Virtual reality software and technology (VRST '06)
By M. Eduard Tudoreanu, Niklas Elmqvist
Issue Date:November 2006
pp. 9-18
We present an empirical usability experiment studying the relative strengths and weaknesses of three different occlusion reduction techniques for discovering and accessing objects in information-rich 3D virtual environments. More specifically, the study co...
     
TrustNeighborhoods in a nutshell
Found in: Proceedings of the 2006 ACM symposium on Software visualization (SoftVis '06)
By Niklas Elmqvist, Philippas Tsigas
Issue Date:September 2006
pp. 189-190
In this short paper, we review the TrustNeighborhoods system for 2D and 3D visualization of trust relationships on the Internet for novice and intermediate-level users. Intended to convey a tangible mental model of security, the system is based on the conc...
     
View projection animation for occlusion reduction
Found in: Proceedings of the working conference on Advanced visual interfaces (AVI '06)
By Niklas Elmqvist, Philippas Tsigas
Issue Date:May 2006
pp. 471-475
Inter-object occlusion is inherent to 3D environments and is one of the challenges of using 3D instead of 2D computer graphics for information visualization. In this paper, we examine this occlusion problem by building a theoretical framework of its causes...
     
BalloonProbe: reducing occlusion in 3D using interactive space distortion
Found in: Proceedings of the ACM symposium on Virtual reality software and technology (VRST '05)
By Niklas Elmqvist
Issue Date:November 2005
pp. 134-137
Using a 3D virtual environment for information visualization is a promising approach, but can in many cases be plagued by a phenomenon of literally not being able to see the forest for the trees. Some parts of the 3D visualization will inevitably occlude o...
     
Growing squares: animated visualization of causal relations
Found in: Proceedings of the 2003 ACM symposium on Software visualization (SoftVis '03)
By Niklas Elmqvist, Philippas Tsigas
Issue Date:June 2003
pp. 17-ff
We present a novel information visualization technique for the graphical representation of causal relations, that is based on the metaphor of color pools spreading over time on a piece of paper. Messages between processes in the system affect the colors of...
     
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