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Answering aggregation queries on hierarchical web sites using adaptive sampling
2005
Proceedings of the 14th ACM international conference on Information and knowledge management - CIKM '05
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Many Web sites publish their data in a hierarchical structure. ...
In this paper we study how to answer such aggregation queries approximately with quality guarantees using sampling. ...
In this study we make the following contributions. • We formulate a new problem about answering aggregation queries on hierarchical web sites. ...
doi:10.1145/1099554.1099605
dblp:conf/cikm/AfratiLL05
fatcat:adc2ob35e5hdthtr3lu3n72jue
Adaptive-sampling algorithms for answering aggregation queries on Web sites
2008
Data & Knowledge Engineering
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Many Web sites publish their data in a hierarchical structure. ...
In this paper, we study how to answer such aggregation queries approximately with quality guarantees using sampling. ...
In this study, we make the following contributions: • We formulate a new problem about answering aggregation queries on hierarchical Web sites. ...
doi:10.1016/j.datak.2007.09.014
fatcat:qzguvpwp2baovb3gonmajwvjgu
Distributed Data Streams
[chapter]
2016
Encyclopedia of Database Systems
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In the one-shot model, a query is issued by a user at some site, and must be answered by "pulling" the ...
., over a communication network), support one-shot or continuous query answers, and be space, time, and communication efficient. ...
consensus on the answer of a distributed stream query. ...
doi:10.1007/978-1-4899-7993-3_137-2
fatcat:fnr32foqjbb7hlhko5ob7532g4
Distributed Data Streams
[chapter]
2009
Encyclopedia of Database Systems
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In the one-shot model, a query is issued by a user at some site, and must be answered by "pulling" the ...
., over a communication network), support one-shot or continuous query answers, and be space, time, and communication efficient. ...
consensus on the answer of a distributed stream query. ...
doi:10.1007/978-0-387-39940-9_137
fatcat:d3hmw63lmzb4foz6yqwpbffqr4
Exploration and mining of web repositories
2014
Proceedings of the 7th ACM international conference on Web search and data mining - WSDM '14
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Data Analytics o Directly support online analytics over the repository o Key Task: efficiently answer aggregate queries (COUNT, SUM, MIN, MAX, etc.) o Overlap with sampling, but a key difference on the ...
Leser, "A Hierarchical Approach to Model Web Query Interfaces for Web Source Integration", VLDB, 2009. ...
• Level 1: a query is needed to determine whether user A befriends B. • Level 2: a query reveals the list of user A's friends. • Level 3: a query reveals the list of user A's friends, as well as the degree ...
doi:10.1145/2556195.2556197
dblp:conf/wsdm/0004D14
fatcat:qd3n4ceurrhbxpyw5ix3vcoe3q
Cooperative Caching for Grid Based DataWarehouses
2007
Seventh IEEE International Symposium on Cluster Computing and the Grid (CCGrid '07)
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Our application follows a two-tiered process for answering queries based on sharing cached OLAP data between the users at the local grid site, and using grid scheduling approaches to execute the remaining ...
A new technique for extraction and aggregation of shared cached OLAP data is proposed, along with an efficient, aggregateaware cache controller. ...
The first tier involves using the Distributed Cache Index Service on the local Site Broker to find all of the locally cached fragments which can be used to answer parts of the query. ...
doi:10.1109/ccgrid.2007.34
dblp:conf/ccgrid/DehneL07
fatcat:zg3rcjilh5dtbcg35uck3juij4
Personalizing Interactions with Information Systems
[chapter]
2003
Advances in Computers
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The survey covers mechanisms for information-finding on the web, advanced information retrieval systems, dialogbased applications, and mobile access paradigms. ...
Specific emphasis is placed on studying how users interact with an information system and how the system can encourage and foster interaction. ...
., web sites) with adaptations of traditional SELECT-FROM-WHERE queries. ...
doi:10.1016/s0065-2458(03)57007-3
fatcat:rdooy2c4gnfajgvu246kjzm2ja
Cooperative caching for grid-enabled OLAP
2009
International Journal of Grid and Utility Computing
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Our application follows a two-tiered process for answering queries based on sharing Cached OLAP data between the users at the local grid site and using grid scheduling approaches to execute the remaining ...
In this paper, we propose a grid-based On-Line Analytical Processing (OLAP) application which distributes query computation across an enterprise grid. ...
The Query Service uses the Distributed Cache Index Service: a global index implemented on the Site Broker of all Cached fragments on the local site. ...
doi:10.1504/ijguc.2009.022032
fatcat:goshhjjx2vh65jbdgfd3cyrz7u
HerbariaViz: A web-based client–server interface for mapping and exploring flora observation data
2011
Ecological Informatics
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With a focus on cartographically-sound visualization and user-friendly interaction, we introduce HerbariaViz, a web mapping application that provides space-time-species data query responses efficiently ...
In this paper, we report on development and implementation of a web-based client-server map interface to facilitate open mapping and exploration of the dataset. ...
Acknowledgements We extend our appreciation to Dick Moe at the Jepson Herbarium, UC Berkeley for making the data used here available to us and for his insightful comments about the system on an early draft ...
doi:10.1016/j.ecoinf.2010.09.001
fatcat:u66jicv3pre4tibqxvxr7nfqse
Semantic and distributed entity search in the web of data
2012
SIGIR Forum
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, c) how can these elements be used in a theoretically sound and effective way?, and d) How can the techniques be adapted to a distributed environment? ...
The main contributions are as follows: • We develop a hybrid approach to search in the Web of Data, using elements from traditional information retrieval and structured retrieval alike. • We formalise ...
However, current state-of-the-art web search engines crawl the We also performed an experiment with a large network of N P =1,000 peers to study the scalability of hybrid aggregation. ...
doi:10.1145/2492189.2492203
fatcat:vnqc7pfhpffhnmt7xngort6v5u
Distributed top-k aggregation queries at large
2009
Distributed and parallel databases
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input sources, and 3) data-adaptive sampling of a small subset of input sources in scenarios with hundreds or thousands of query-relevant network nodes. ...
The optimizations address three degrees of freedom: 1) hierarchically grouping input lists into top-k operator trees and optimizing the tree structure, 2) computing data-adaptive scan depths for different ...
TreeTPUT uses hierarchical query execution plans resulting from the optimizations introduced in Sect. 5, in addition to the adaptive-threshold technique of Adap-tiveTPUT. ...
doi:10.1007/s10619-009-7041-z
fatcat:qid6zibirvfm5c4i3xfkz2a4z4
HiPPIS
2008
Proceeding of the 10th ACM workshop on Web information and data management - WIDM '08
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Extensive experimental evaluations show that, on top of the advantages that a distributed storage offers, our method answers the large majority of incoming queries, both point and aggregate ones, without ...
Our scheme utilizes an adaptive algorithm that automatically adjusts the level of indexing according to the granularity of the incoming queries, without assuming any prior knowledge of the workload. ...
querying hierarchical data. ...
doi:10.1145/1458502.1458513
dblp:conf/widm/DokaTK08
fatcat:yntjzpz7jjfmvp3uvpkuj4gltm
Models and issues in data stream systems
2002
Proceedings of the twenty-first ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems - PODS '02
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, while traditional DBMS's focus largely on the opposite goal of precise answers computed by stable query plans. ...
., network measurements, call records, web page visits, sensor readings, and so on. ...
The Traderbot web site [83] gives some examples of one-time and continuous queries that are commonly posed by its customers. ...
doi:10.1145/543613.543615
dblp:conf/pods/BabcockBDMW02
fatcat:avqbzp74v5buvkzqoayslqwr64
IrisNet: An architecture for a worldwide sensor web
2003
IEEE pervasive computing
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They use simple sensors that provide time series of single numerical measurements, such as temperature, pressure, light level, and so on. ...
A particular sensor might be positioned to measure a physical area of interest for one particular service, but it might, in fact, provide data useful in multiple services. ...
Finally, we thank Mark Abbott, Rob Holman, Chuck Sears, Ganesh Gopalan, and Curt Vandetta for their collaboration on the coastal-imaging service. ...
doi:10.1109/mprv.2003.1251166
fatcat:iusayvuahbenhm5jln6zlsfykq
When one sample is not enough
2004
Proceedings of the 2004 ACM SIGMOD international conference on Management of data - SIGMOD '04
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Specifically, we exploit a (given or derived) hierarchical categorization of the databases and adapt the notion of "shrinkage" -a form of smoothing that has been used successfully for document classification-to ...
Previous research has developed algorithms for constructing an approximate content summary of a text database from a small document sample extracted via querying. ...
Web: This set contains the top-5 real web databases from each of the 54 leaf categories of the hierarchy, as ranked in the Google Directory 6 , plus other arbitrarily selected web sites, for a total of ...
doi:10.1145/1007568.1007655
dblp:conf/sigmod/IpeirotisG04
fatcat:uobh26usj5eldcpo6ab5bagx3a
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