By Ehab ElGindy, Alia Abdelmoty (auth.), Liwei Wang, Jingjue Jiang, Jiaheng Lu, Liang Hong, Bin Liu (eds.)

This booklet constitutes the completely refereed post-conference court cases of 3 workshops of the twelfth foreign convention on Web-Age details administration, WAIM 2011, held in Wuhan, China, in September 2011. The 20 revised complete papers are geared up in topical sections at the 3 following workshops: the 1st overseas Workshop on Web-based Geographic info administration (WGIM 2011), the 3rd overseas Workshop on XML information administration (XMLDM 2011), and the 1st overseas Workshop on Social community research (SNA 2011).

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The query cost of the HTPR*-tree is less than that of the TD_HTPR*-tree. Since the node overlap in the HTPR*-tree is larger than that in the TPR*-tree, the query cost of the HTPR*-tree is a bit higher than that of the TPR*-tree. Despite this, the important fact is that HTPR*-tree can support history query. 6 Conclusion In this paper, we develop a novel index structure named the HTPR*-tree which not only supports predictive queries but also partial history ones. At the same time, we propose a bottom-up update approach to support frequent update operation of the HTPR*-tree.

Querying the Positions of Moving Objects For example, query Q1 is predictive timeslice query, and gets object O1 and O2. Query Q2, Q3, and Q4 are history queries. Query Q2 intersects with partial history trajectories after the most recent update instant (tomru) of objects O1 and O2 stored in HTPR*-tree. However, HTPR*-tree couldn’t realize query Q2 completely because the query time is earlier than the last update time (tlu). In order to realize the queries involved from the past to the future, HTPR*-tree should be combined with some indices for describing history trajectories such as TB-tree.

What types of data interaction should be supported? How much control should the user have in determining how the data are retrieved and presented? How much processing should be done on client and how much on the server? In addition to these basic design questions, decisions on which development tools to use must be made. There is no one best set of tools, and choices often reflect the developer’s experience and preferences. Current rich internet application (RIA) development is dominated by frameworks available in Flex, Silverlight, and to a lesser extent, JavaFX.

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