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STI Summit 2011 - Visual analytics and linked data
1.
7th July 2011
www.know-center.at Visual Analytics on Linked Data – An Opportunity for both Fields STI Riga Summit M. Granitzer, V. Sabol, W. Kienreich (Know-Center) D. Lukose, Kow Weng Onn (MIMOS) © Know-Center 2011 gefördert durch das Kompetenzzentrenprogramm
2.
Motivation !
Success factors in the Web Data + Services + Usage What are scenarios/domains to increase usage in the Web of Data? 2 © Know-Center 2010
3.
Some Use Cases Great
services to improve access to Linked Data Focus: queries & browsing of general knowledge for the average user Missing support for complex, analytical scenarios • What are influencing factors of the demographic development compared over different countries? • What is the best text retrieval algorithm on large enterprise repositories? • Compare unemployment rates, financial situation of states etc. to identify 3 common causations? © Know-Center 2010
4.
Textbox + Search
Button != Answering Complex Questions Good overview, but • No interaction to analyse the results • No details, no zoom in • No possibility to add new, compare different sources • Different tasks and user need different representation forms of data Answering complex question is (i) a hard problem (ii) a process, not a query 4 © Know-Center 2010
5.
Visual Analytics –
Focus on Analytical Problems „Visual analytics is the science of analytical reasoning facilitated by interactive visual interfaces.“ J.J. Thomas and K.A. Cook, Illuminating the Path: The Research and Development Agenda for Visual Analytics, IEEE Computer Society, 2005. Key Points: ! Incorporation of intuition, creativity and non-explicit background knowledge into mining approaches ! Support solving analytical where the analytical problem is hard to formalize ! Increase user confidence in found solution 5 Keim, D., Mansmann, F., & Thomas, J. (2010). Visual analytics: how much visualization and how much analytics? ACM SIGKDD Explorations Newsletter, 11(2), 58. ACM © Know-Center 2010
6.
Visual Analytics Examples
Financial Data D. A. Keim, T. Nietzschmann, N. Schelwies, J. Schneidewind, T. Schreck, and H. Ziegler, “FinDEx: A spectral visualization system for analyzing Fig. 4. Visualseries data,”of financial data with the FinDEx system [12]. on Visual- ization, Lisbon, Portugal, 8-10 May, 2006. financial time analysis in EuroVis 2006: Eurographics/IEEE-VGTC Symposium The growth rates for time intervals are triangulated in order to visualize all possible time frames. The small triangle represents the absolute performance of one stock, the big triangle represents the performance of one stock compared to the whole market. lenge in this area lies in analyzing the data under multiple perspectives and as- Patent Analysis sumptions to understand historical and current situations, and then monitoring the market to forecast trends and to identify recurring situations. Visual ana- lytics applications can help analysts obtaining insights and understanding into previous stock market development, as well as supporting the decision making progress by monitoring the stock market in real-time in order to take necessary actions for a competitive advantage, with powerful means that reach far beyond 6 the numeric technical chart analysis indicators or traditional line charts. One popular application in this field is the well-known Smartmoney [13], which gives © Know-Center 2010 an instant visual overview of the development of the stock market in particular
7.
Visual Analytics Examples
Simulation of Biolog. Processes Hans-Joerg Schulz, Adelinde Uhrmacher and Heidrun Schumann. Visual Analytics for Stochastic Simulation in Cell Biology, Proceedings of i-Know’11 (to-appear) Figure 1: The table-based visualization approach [36] showing a part of the human reactome model. The species are listed in the left table with the cell compartments they reside in shown in the far right column, the reaction are listed in the right table. The links in between both tables indicate which species participate in which reaction. The arcs at both sides are shortcuts for a faster traversal of the network without the need to go back and forth between both tables to follow up on dependencies. Different automated selections have been made in this example, using a script-based selection mechanism. but also the reaction kinetics. The resulting models can that have been developed for tables, e.g., the table lens and be stored in specific exchange formats, such as the Systems its extensions [20]. The integrated exploration of both tables Or simple pie, bar & line charts Biology Markup Language (SBML). is supported by edge-based traveling techniques [38], which allow to investigate biochemical dependencies in detail even In order to provide a visualization with a lot of possibilities if they are scattered across larger tables. Additional analyt- (but combined in a meaningful way) for interactive analysis, we developed a table-based repre- sentation for such models of reaction networks [36]. In this ical support is given by a script-based selection mechanism, which is able to automatically generate follow-up selections table-based representation attributes are used for represent- by carrying out a script that traverses the network according ing discrete space, by assigning species to reside in discrete to the given script logic. Process knowledge about analyt- compartments, e.g., outside of the cell, within the cytosol, ical procedures on reaction networks, such as dependency within the nucleus, etc. (see also [31]). analysis, can thus be encoded in such a script, carried out 7 whenever needed with a single mouse click, and even passed It utilizes the “Analysis First” step of the Visual Analytics Google Chart API Examples on for use by other researchers as well. This naturally brings process to compute a graph-theoretical transformation, the together the table-based visualization, the interaction on ta- © Know-Center 2010 so-called K¨nig’s Transformation [37], which converts the o bles as well as on links, and the analytical tools being tightly
8.
Visual Analytics on
Linked Data Domains Visual Analytics is domain & task specific ! Research domains with empirical data ! Benchmarking data in Computer Science ! Financial datasets in Economics ! Life-Sciences ! Governmental/Social Data ! Socio-economic data ! Demographic data ! !. Focused on expert users ! Analysts ! Researchers ! ! 8 © Know-Center 2010
9.
Visual Analytics on
Linked Data Enabling Technologies Aggregation & Filtering ! Single point of access to domain ! Data aggregation and filtering capabilities Workflows & Mining ! Cloud-based mining and discovery processes (e.g. Google Predict) ! Scalability ! Sharing/Publishing of analytic workflows Visualisation as enabling Technology ! Discovery Components ! Presentation Components ! Easy Data-Binding (JDBC, Ontology-based UI) " Support domain experts thereby crowed-sourcing data analysis, aggregation and presentation " Collaborative analytical tasks on a global scale! (and it is an eye catcher for users) 9 © Know-Center 2010
10.
Analytic WorkflowExtended Linked-Data
Map Visiualisation, Fig. 4. Visual analysis of financial data with the FinDEx system [12]. The growth rates for time intervals are triangulated in order to visualize all possible time frames. Figure 1: The table-based visualization approach [36] showing a part of the human reactome model. The The small triangle represents the absolute performance of one stock, the big triangle species are listed in the left table with the cell compartments they reside in shown in the far right column, represents the performance of one stock compared to the whole market. the reaction are listed in the right table. The links in between both tables indicate which species participate Domain specific in which reaction. The arcs at both sides are shortcuts for a faster traversal of the network without the need to go back and forth between both tables to follow up on dependencies. Different automated selections have been made in this example, using a script-based selection mechanism. lenge in this area lies in analyzing the data under multiple perspectives and as- but also the reaction kinetics. The resulting models can that have been developed for tables, e.g., the table lens and sumptions to understand historical and current situations, and then monitoring be stored in specific exchange formats, such as the Systems its extensions [20]. The integrated exploration of both tables the market to forecast trends and to identify recurring situations. Visual ana- Biology Markup Language (SBML). is supported by edge-based traveling techniques [38], which lytics applications can help analysts obtaining insights and understanding into allow to investigate biochemical dependencies in detail even In order to provide a visualization with a lot of possibilities if they are scattered across larger tables. Additional analyt- previous stock market development, as well as supporting the decision making for interactive analysis, we developed a table-based repre- ical support is given by a script-based selection mechanism, progress by monitoring the stock market in real-time in order to take necessary sentation for such models of reaction networks [36]. In this which is able to automatically generate follow-up selections views table-based representation attributes are used for represent- by carrying out a script that traverses the network according actions for a competitive advantage, with powerful means that reach far beyond ing discrete space, by assigning species to reside in discrete to the given script logic. Process knowledge about analyt- the numeric technical chart analysis indicators or traditional line charts. One compartments, e.g., outside of the cell, within the cytosol, ical procedures on reaction networks, such as dependency popular application in this field is the well-known Smartmoney [13], which gives within the nucleus, etc. (see also [31]). analysis, can thus be encoded in such a script, carried out whenever needed with a single mouse click, and even passed an instant visual overview of the development of the stock market in particular It utilizes the “Analysis First” step of the Visual Analytics on for use by other researchers as well. This naturally brings sectors for a user-definable time frame. A new application in this field is the process to compute a graph-theoretical transformation, the together the table-based visualization, the interaction on ta- FinDEx system [12] (see Fig. 4), which allows a visual comparison of a fund’s so-called K¨nig’s Transformation [37], which converts the o bles as well as on links, and the analytical tools being tightly hypergraph structure into a bipartite graph structure. This integrated in the interactive selection mechanism. performance to the whole market for all possible time intervals at one glance. bipartite graph structure contains the species as one node set, with their compartment encoded as a node attribute, 3. VISUAL ANALYTICS FOR CONFIGURA- and the reactions as another node set, and the edges between 4.3 Environmental Monitoring both node sets indicate which species partake in which reac- TIONS tions. An overview of the table-based visualization showing The last section dealt with a flat model structure. Modeling of spatial dynamics is realized via attributes, e.g., to describe Monitoring climate and weather is also a domain which involves huge amounts both node sets and the edges in between is given in Fig. 1. β − catenin shuttling from the cytosol to the nucleus, the of data collected throughout the world or from satellites in short time intervals, The benefits of this approach are apparent: tables scale up to value of the attribute denoting its location would change easily accumulating to terabytes per day. Applications in this domain most often 100,000 entries, they do not clutter, they are interactively re- from cytosol to nucleus. Discrete localization of a species can also be modeled via an explicit hierarchical model structure do not only visualize snapshots of a current situation, but also have to gener- orderable, and they can be used with all the enhancements which breaks the cell down in its compartments on the first ate sequences of previous developments and forecasts for the future in order to analyse certain phenomena and to identify the factors responsible for a devel- opment, thus enabling the decision maker to take necessary countermeasures Linked Data (like the global reduction of carbon dioxide emissions in order to reduce global 10 © Know-Center 2010
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