In this paper, we presented a spark based analysis framework for large scale spatial temporal data such as trajectories, LBS, Noise distribution and so on. With spark, spatial temporal data can be processed, mined and...
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ISBN:
(纸本)9781509006199
In this paper, we presented a spark based analysis framework for large scale spatial temporal data such as trajectories, LBS, Noise distribution and so on. With spark, spatial temporal data can be processed, mined and the results can be saved in parallel. Then these results will be imported into spatial-indexed databases for further applications. Finally, we studied the volume rendering methods to improve the visualization for the spatial temporal analysis results. We tested our algorithm on a spark cluster. The experimental results indicate that the proposed method is efficient to process and illustrate the spatial temporal big data.
This paper presents a visualization technique for multidimensional datasets containing real and categorical variables. Supposing multidimensional datasets containing real and categorical values, this technique display...
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ISBN:
(纸本)9781728128382
This paper presents a visualization technique for multidimensional datasets containing real and categorical variables. Supposing multidimensional datasets containing real and categorical values, this technique displays a set of axes corresponding to the dimensions of real values. The technique evenly divides the axes into several ranges and displays component bar charts there. It brightly draws the component bar charts if association rules are applied at the corresponding ranges of the dimensions of real values. As a result, this technique highlights association rules so that users can discover important relationships between real and categorical variables in multidimensional datasets. This paper introduces an application of the presented technique to painting image collections. This application visualizes image features and categorical information of painting images and provides a user interface to browse the painting images associated with the multidimensional values. This paper also introduces user evaluation results of the user interfaces for painting image collections.
visualization has been taking a role of much importance in both science and business areas. For scientists, visualization is a method to gain the meaning of and insight from scientific data and computational results;f...
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The authors describe an innovative personal visualization system and its application to several research and engineering problems. The system bridges both hardware and software components to permit a user to graphical...
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ISBN:
(纸本)0818620838
The authors describe an innovative personal visualization system and its application to several research and engineering problems. The system bridges both hardware and software components to permit a user to graphically describe a visualization problem to the computer;thereby reducing program development time to a few hours. Low-cost visualization is achieved using PC-based software that can either be executed on a PC or drive graphic workstations for high-resolution displays. In either case, supercomputer computation rates are available for the visualization process. On PCs this is done with one or more PiP plug in cards, each of which is capable of 100 million floating point operations per second. On workstations this is done with the QUEN array processor.
Motivation: Software visualization can be helpful in comprehending the architecture of large software systems. Traditionally, software visualisation focuses on representing the structural perspectives of systems. In t...
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ISBN:
(纸本)9781728199146
Motivation: Software visualization can be helpful in comprehending the architecture of large software systems. Traditionally, software visualisation focuses on representing the structural perspectives of systems. In this paper we enrich this perspective by adding the notion of role-stereotype. This role-stereotype carries information about the type of functionality that a class has in the system as well as the types of collaborations with other classes that it typically has. Objective: We propose an interactive visualization called RoleViz, that visualizes system architectures in which architectural elements are annotated with their role-stereotypes. Method: We conducted a user-study in which developers use RoleViz and Softagram (a commercial tool for software architecture comprehension) to solve two separate comprehension tasks on a large open source system. We compared RoleViz against Softagram in terms of participant's: (i) perceived cognitive load, (ii) perceived usability, and (iii) understanding of the system. Result: In total, 16 developers participated in our study. Six of the participants explicitly indicated that visualizing roles helped them complete the assigned tasks. Our observations indicate significant differences in terms of participant's perceived usability and understanding scores. Conclusion: The participants achieved better scores on completing software understanding tasks with RoleViz without any cognitive-load penalty.
When visually representing a rooted tree, a hierarchical drawing, a type of monotone drawing, is often used. In a layout where nodes with the same level are arranged on a horizontal straight line, the resulting shape ...
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ISBN:
(纸本)9798350393811;9798350393804
When visually representing a rooted tree, a hierarchical drawing, a type of monotone drawing, is often used. In a layout where nodes with the same level are arranged on a horizontal straight line, the resulting shape often appears stretched horizontally. Depending on the aspect ratio of a rectangular drawing area, this can result in significant wasted space. This study presents a layout method developed to address this problem. The method maintains a monotone drawing but relaxes the criteria for arranging nodes with the same level on a horizontal straight line. Leaves with the same parent may be arranged on a folded line instead of a horizontal straight line;we call this a monotone local folding layout. Area adaptivity is introduced as a measure of spatial efficiency for a given drawing area, and the area adaptivity of the monotone local folding layout is investigated using 2500 randomly generated rooted trees as experimental data. This study also examines how area adaptivity is affected when the aspect ratio of the drawing area is changed. The experiments show that for rooted trees with many sibling leaves, the area adaptivity of the monotone local folding layout is good and is not affected by changes in the aspect ratio of the drawing area. As a result, the monotone local folding layout is an effective layout technique for rooted trees representing computer networks consisting of switches and many terminals.
In order to understand complex vortical flows in large data sets, we must be able to detect and visualize vortices in an automated fashion. In this paper, we present a feature-based vortex detection and visualization ...
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In order to understand complex vortical flows in large data sets, we must be able to detect and visualize vortices in an automated fashion. In this paper, we present a feature-based vortex detection and visualization technique that is appropriate for large computational fluid dynamics data sets computed on unstructured meshes. In particular, we focus on the application of this technique to visualization of the flow over a serrated wing and the flow field around a spinning missile with dithering canards. We have developed a core line extraction technique based on the observation that vortex cores coincide with local extrema in certain scalar fields. We also have developed a novel technique to handle complex vortex topology that is based on k-means clustering. These techniques facilitate visualization of vortices in simulation data that may not be optimally resolved or sampled. Results are included that highlight the strengths and weaknesses of our approach. We conclude by describing how our approach can be improved to enhance robustness and expand its range of applicability.
The existing project management software cannot demonstrate the relation of the group collaboration during a project, while they are useful for many projects to control their progress and process. Given their drawback...
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ISBN:
(纸本)9781479937769
The existing project management software cannot demonstrate the relation of the group collaboration during a project, while they are useful for many projects to control their progress and process. Given their drawbacks, this paper introduces the storyline, a visualization technology that can make up the limitation. The complex relation of group collaboration can be visualized by the storyline layout through the mappings of being from the developer's entity object to lines, from the job tasks to the inter-sessions, and from the cooperative relation among the entity objects to the distance between lines. The result shows that the storyline works well in the project management as they can display the cooperative relation among the developers clearly and intuitively. Based on that, we can analyze the cooperative relationship of developers so as to improve the efficiency of the project management.
The growing accumulation of biological pathway datasets is making it possible to study pathways at genomic scale by exploration and visualization, facilitating the shift of biomedical research to systems-level analyse...
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ISBN:
(纸本)9781424418145
The growing accumulation of biological pathway datasets is making it possible to study pathways at genomic scale by exploration and visualization, facilitating the shift of biomedical research to systems-level analyses. Presented in this paper is our ongoing work on developing a system for exploring and visualizing biological pathways for large scale pathway analyses. A pathway repository with a standard data format was developed for storing various types of pathways, mechanisms for navigating among different pathway datasets and to external data sources were also designed, and a rendering engine is being developed to allow user for visualization and exploration.
In this paper we would like to suggest a modification of data vases visualization that can help understanding complex data where each subject is described by a vector of synchronized signals taken in the same time int...
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