2,072 research outputs found
Gesture-Based Input for Drawing Schematics on a Mobile Device
We present a system for drawing metro map style schematics using a gesture-based interface. This work brings together techniques in gesture recognition on touch-sensitive devices with research in schematic layout of networks. The software allows users to create and edit schematic networks, and provides an automated layout method for improving the appearance of the schematic. A case study using the metro map metaphor to visualize social networks and web site structure is described
Principal manifolds and graphs in practice: from molecular biology to dynamical systems
We present several applications of non-linear data modeling, using principal
manifolds and principal graphs constructed using the metaphor of elasticity
(elastic principal graph approach). These approaches are generalizations of the
Kohonen's self-organizing maps, a class of artificial neural networks. On
several examples we show advantages of using non-linear objects for data
approximation in comparison to the linear ones. We propose four numerical
criteria for comparing linear and non-linear mappings of datasets into the
spaces of lower dimension. The examples are taken from comparative political
science, from analysis of high-throughput data in molecular biology, from
analysis of dynamical systems.Comment: 12 pages, 9 figure
Visual analysis for conceptual design of complex systems
Managing the development of complex organizational, technological, and socio-cultural systems calls for the construction of conceptual models that would define the properties and links between the elements of the systems and focus the attention of decision makers on the most significant aspects. The authors propose the visual analysis method as a tool for the conceptual design of complex systems. The method is based on the building of a series of visual images that are associated with the purpose sustainable development and holistic representation of the system. At the initial stage, the general structure of a complex system is analyzed and the required degree of detail of its elements is determined. The system is then broken down into elements and a specific visualization tool is selected for each of them so that the properties of the systems that need improving are highlighted. Ultimately, a conceptual design of the system is created that suggests managerial solutions that meet the interests of the stakeholders. The method has been tested in a number of projects that were implemented with the purpose of ensuring the strategic leadership of major manufacturing companies. © 2018 WIT Press.ACKNOWLEDGEMENTS The work was supported by Act 211 of the Government of the Russian Federation, contract No 02.A03.21.0006
Embedding Spatial Software Visualization in the IDE: an Exploratory Study
Software visualization can be of great use for understanding and exploring a
software system in an intuitive manner. Spatial representation of software is a
promising approach of increasing interest. However, little is known about how
developers interact with spatial visualizations that are embedded in the IDE.
In this paper, we present a pilot study that explores the use of Software
Cartography for program comprehension of an unknown system. We investigated
whether developers establish a spatial memory of the system, whether clustering
by topic offers a sound base layout, and how developers interact with maps. We
report our results in the form of observations, hypotheses, and implications.
Key findings are a) that developers made good use of the map to inspect search
results and call graphs, and b) that developers found the base layout
surprising and often confusing. We conclude with concrete advice for the design
of embedded software maps.Comment: To appear in proceedings of SOFTVIS 2010 conferenc
Visualization and interaction in a simulation system for flood emergencies
Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Mestre em Engenharia InformáticaThis thesis presents an interaction and visualization system for a river flood emergency simulation. It will also present a detailed study about forms of visual representation of critical elements in emergencies. All these elements are currently assembled in an application based
on geographic information systems and agent simulation. Many of the goals in this thesis are interconnected with project Life-Saver. This project has the goal to develop an emergency response simulator, which needs a visualization and interaction system.
The main goals of this thesis are, to create a visualization system for an emergency, to
design an intuitive multimedia interface and to implement new forms of human-computer
interaction.
At the application level there is a representation of the simulation scenario with the multiple agent and their actions. Several studies were made to create an intuitive interface.
New forms of multimedia interaction are studied and used such as interactive touch sensible boards and multi-touch panels. It is possible to load and retrieve geographic information on the scenario. The resulting architecture is used to visualize a simulation of an emergency flooding situation in a scenario where the Alqueva dam in Guadiana river fails
Data Feel: Exploring Visual Effects in Video Games to Support Sensemaking Tasks
This paper explores the use of visual effects common in video games that
support a range of tasks that are similar in many ways to analysis tasks
supported in visual analytics tools. While some visual effects are meant to
increase engagement or to support a game's overall visual design, we find that
in many games visual effects are used throughout gameplay in order to assist a
player in reasoning about the game world. In this work, we survey popular games
across a range of categories (from casual games to "Triple A" games), focusing
specifically on visual effects that support a player's sensemaking within the
game world. Based on our analysis of these games, we identify a range of tasks
that could benefit from the use of "data feel," and advocate for the continued
investigation of visual effects and their application in data visualization
software tools.Comment: 7 pages, 5 figures, VIS4DH 202
Improving Automated Layout Techniques for the Production of Schematic Diagrams
This thesis explores techniques for the automated production of schematic diagrams, in particular those in the style of metro maps. Metro map style schematics are used across the world, typically to depict public transport networks, and therefore benefit from an innate level of user familiarity not found with most other data visualisation styles. Currently, this style of schematic is used infrequently due to the difficulties involved with creating an effective layout – there are no software tools to aid with the positioning of nodes and other features, resulting in schematics being produced by hand at great expense of time and effort.
Automated schematic layout has been an active area of research for the past decade, and part of our work extends upon an effective current technique – multi-criteria hill climbing. We have implemented additional layout criteria and clustering techniques, as well as performance optimisations to improve the final results. Additionally, we ran a series of layouts whilst varying algorithm parameters in an attempt to identify patterns specific to map characteristics. This layout algorithm has been implemented into a custom-written piece of software running on the Android operating system. The software is targeted at tablet devices, using their touch-sensitive screens with a gesture recognition system to allow users to construct complex schematics using sequences of simple gestures.
Following on from this, we present our work on a modified force-directed layout method capable of producing fast, high-quality, angular schematic layouts. Our method produces superior results to the previous octilinear force-directed layout method, and is capable of producing results comparable to many of the much slower current approaches. Using our force-directed layout method we then implemented a novel mental map preservation technique which aims to preserve node proximity relations during optimisation; we believe this approach provides a number of benefits over the the more common method of preserving absolute node positions. Finally, we performed a user study on our method to test the effect of varying levels of mental map preservation on diagram comprehension
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