We present the graph-based querying paradigm used in the Regional Avalanche Information and Forecasting System (RAIFoS) for the collection and analysis of snow and weather related physical parameters in the Swiss Alps...
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We present the graph-based querying paradigm used in the Regional Avalanche Information and Forecasting System (RAIFoS) for the collection and analysis of snow and weather related physical parameters in the Swiss Alps. The querying paradigm relies upon the issue of interactively constructing a semantically valid query graph on an information states blackboard as guided by meta-data elements standing for interpretations of conceptual model, data values and/or operations. The meta-data elements constitute the terms of a meta-data-driven query language (MDDQL) the interpretation of which is done interactively relying on a kind of finite state automaton.
This paper introduces the concept of metaphorical structure as a way of conciliating user interface development by demonstration and by generation so that advantages of both approaches are exploited together. It basic...
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This paper introduces the concept of metaphorical structure as a way of conciliating user interface development by demonstration and by generation so that advantages of both approaches are exploited together. It basically consists of substituting part or whole of the contents of a preliminary presentation model by a set of pre-defined specifications attached to a presentation and behavior. This substitution is aimed at forming a new example from results of a previously generated user interface. This example can be reused in a programming by demonstration approach to exploit past experience. This process seems to be particularly helpful and efficient when the models used for specifying a new application become very large and are largely based on previously made designs. Advantages and shortcomings of this technique are analyzed and exemplified within an existing model-based user interface development environment called SEGUIA.
The development process for access methods (AMs) in database systems is complex and tedious. Amdb is a graphical tool that facilitates the design and tuning process for height-balanced tree-structured AMs. Central to ...
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The development process for access methods (AMs) in database systems is complex and tedious. Amdb is a graphical tool that facilitates the design and tuning process for height-balanced tree-structured AMs. Central to amdb's user interface is a suite of graphical views that visualize the entire search tree, paths and subtrees within the tree, and data contained in the tree. These views animate search tree operations in order to visualize the behavior of an access method. Amdb provides metrics that characterize the performance of queries, the tree structure, and the structure-shaping aspects of an AM implementation. The visualizations can be used to browse the performance metrics in the context of the tree structure. The combination of these features allows a designer to locate the sources of performance loss reported by the metrics and investigate causes for those deficiencies.
Visual exploration of massive data sets arising in the telecommunication industry is a challenge. This paper describes a number of different techniques for visually exploring large data sets. The techniques cover a wi...
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Visual exploration of massive data sets arising in the telecommunication industry is a challenge. This paper describes a number of different techniques for visually exploring large data sets. The techniques cover a wide range of techniques, including statistical 2D displays, pixel-oriented displays, and dynamic 3D displays with variable resolution. The techniques have been successfully applied in the telecommunications industry to analyze call detail data for understanding customer behavior and preventing fraudulent usage, and to monitor network traffic for analyzing unexpected network events such as high volumes of unanswered calls.
Recent database applications deal with temporal data. Such applications are typically oriented towards a large set of users, and therefore need to be equipped with suitable interfaces facilitating the interaction with...
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Recent database applications deal with temporal data. Such applications are typically oriented towards a large set of users, and therefore need to be equipped with suitable interfaces facilitating the interaction with the system. However, very few empirical studies aimed at testing and validating the effectiveness of various query styles and interfaces have been conducted in the database field. It is of note that temporal information is also relevant in modeling user interaction. We propose a visual query system incorporating aspects related to both application data and data concerning user interaction. The system exploits a graph based formalism and suitable graphical primitives. The main feature of the system is that data about the history of interaction is stored, accessed and dynamically maintained with the same mechanisms as the application data. This approach is an effort towards clearly establishing a link between user interaction and modeling, and data modeling and querying, and also allows a structured analysis of usability results.
In the development of interactive systems, the selection of interaction objects refers to the process of identifying usable widgets for each piece of data forming the system according to various parameters. This proce...
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In the development of interactive systems, the selection of interaction objects refers to the process of identifying usable widgets for each piece of data forming the system according to various parameters. This process can become repetitive and tedious for dataintensivesystems where data is abundant. To overcome this shortcoming and to provide assistance to designers who are responsible for conducting this process, two types of advice-giving systems for selecting interaction objects have been developed. SELECTVISION consists of a system where parameters are input manually and the possible selected interaction objects are displayed interactively. SEGUIA consists of a knowledge based system where the selection process can be conducted either automatically after providing a file of parameters or in a mixed-initiative approach where both the system and the designer are interacting to conduct the process. Both systems share a common internal representation of usability guidelines for selecting interaction objects expressed as a selection tree of rules. This structure has been shown to be very observable and easy to process, while preserving some maintainability.
We have implemented a Java-based visual interface for P/FDM which has at its centre a graphical representation of the database schema. users construct queries by clicking on entity classes and relationships in the sch...
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We have implemented a Java-based visual interface for P/FDM which has at its centre a graphical representation of the database schema. users construct queries by clicking on entity classes and relationships in the schema diagram and constraining the values of attributes selected from menus. As this is done, the Daplex text of the query under construction is built up in a subwindow (the query editor window). Queries are submitted to the database via a CORBA interface. Results satisfying the selection criteria are displayed in a table in a separate result window, together with the Daplex text of the query. A particularly novel feature of the interface is a "copy-and-drop" facility which enables the user to select and copy data values in the result window and then "drop" these into the query editor window. When this is done, the selected values are merged into the original query automatically, in the appropriate place in the query text, to produce a more specialised query. This query can then be extended by the user, if required, and submitted to the database for execution. Thus, complex queries can be built up in stages by inspecting intermediate results and modifying the follow-on queries to have stronger selection criteria and additional navigation links.
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