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Querying Heterogeneous Information Sources Using Source Descriptions

by Alon Levy, Anand Rajaraman, Joann Ordille , 1996
"... We witness a rapid increase in the number of structured information sources that are available online, especially on the WWW. These sources include commercial databases on product information, stock market information, real estate, automobiles, and entertainment. We would like to use the data stored ..."
Abstract - Cited by 724 (34 self) - Add to MetaCart
stored in these databases to answer complex queries that go beyond keyword searches. We face the following challenges: (1) Several information sources store interrelated data, and any query-answering system must understand the relationships between their contents. (2) Many sources are not full

Statistical Study of Unusual DNS Query Traffic

by Dennis Arturo, Yasuo Musashi, Hirofumi Nagatomi, Kenichi Sugitani
"... We statistically investigated on the unusual big DNS resolution traffic toward the top domain DNS server from a university local campus network in April 11th, 2006. The following results are obtained: (1) In April 11th, the DNS query traffic includes a lot of fully qualified domain names (FQDNs) of ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
) of several specific web sites as name resolution keywords. (2) Also, the DNS query traffic includes a plenty of source IP addresses of PC clients. Also (3), the several DNS query keywords including specific well-known web sites can be found in the DNS traffic. Therefore, it can be concluded that we can

Efficient Filtering of XML Documents for Selective Dissemination of Information

by Mehmet Altınel , 2000
"... Information Dissemination applications are gaining increasing popularity due to dramatic improvements in communications bandwidth and ubiquity. The sheer volume of data available necessitates the use of selective approaches to dissemination in order to avoid overwhelming users with unnecessaryi ..."
Abstract - Cited by 364 (17 self) - Add to MetaCart
with unnecessaryinformation. Existing mechanisms for selective dissemination typically rely on simple keyword matching or "bag of words" information retrieval techniques. The advent of XML as a standard for information exchangeand the development of query languages for XML data enables the development of more

Statistical Study of Unusual DNS Query Traffic

by unknown authors
"... Abstract — We statistically investigated on the unusual big DNS resolution traffic toward the top domain DNS server from a university local campus network in April 11th, 2006. The following results are obtained: (1) In April 11th, the DNS query traffic includes a lot of fully qualified domain names ..."
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(FQDNs) of several specific web sites as name resolution keywords. (2) Also, the DNS query traffic includes a plenty of source IP addresses of PC clients. Usually, we can observe the source IP addresses of E-mail and/or Web servers in the usual DNS query traffic, mainly. From this point, it can

Blinks: Ranked keyword searches on graphs

by Hao He, Haixun Wang, Jun Yang, Philip S. Yu , 2007
"... Query processing over graph-structured data is enjoying a growing number of applications. A top-k keyword search query on a graph nds the top k answers according to some ranking criteria, where each answer is a substructure of the graph containing all query keywords. Current techniques for supportin ..."
Abstract - Cited by 139 (9 self) - Add to MetaCart
for supporting such queries on general graphs suffer from several drawbacks, e.g., poor worst-case performance, not taking full advantage of indexes, and high memory requirements. To address these problems, we propose BLINKS, a bi-level indexing and query processing scheme for top-k keyword search on graphs

Integrating Keyword Search into XML Query Processing

by Daniela Florescu , 2000
"... Due to the popularity of the XML data format, several query languages for XML have been proposed, specially devised to handle data whose structure is unknown, loose, or absent. While these languages are rich enough to allow for querying the content and structure of an XML document, a varying or unkn ..."
Abstract - Cited by 79 (2 self) - Add to MetaCart
Due to the popularity of the XML data format, several query languages for XML have been proposed, specially devised to handle data whose structure is unknown, loose, or absent. While these languages are rich enough to allow for querying the content and structure of an XML document, a varying

Threats of Unusual DNS Query Traffic from NIS Clients

by Dennis A. Ludeña Romaña, Hirofumi Nagatomi, Yasuo Musashi, Kenichi Sugitani
"... Abstract We statistically investigated on unusual DNS query traffic from the several Linux PC servers employing network information system (NIS) as their authentication in the campus network of a university. The following re-sults are obtained: (1) The DNS query traffic includes specific keywords of ..."
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Abstract We statistically investigated on unusual DNS query traffic from the several Linux PC servers employing network information system (NIS) as their authentication in the campus network of a university. The following re-sults are obtained: (1) The DNS query traffic includes specific keywords

The TV-tree -- an index structure for high-dimensional data

by King-ip Lin, H. V. Jagadish, Christos Faloutsos - VLDB Journal , 1994
"... We propose a file structure to index high-dimensionality data, typically, points in some feature space. The idea is to use only a few of the features, utilizing additional features whenever the additional discriminatory power is absolutely necessary. We present in detail the design of our tree struc ..."
Abstract - Cited by 218 (7 self) - Add to MetaCart
method, with up to 80% savings in disk accesses. Type of Contribution: New Index Structure, for high-dimensionality feature spaces. Algorithms and performance measurements. Keywords: Spatial Index, Similarity Retrieval, Query by Content 1 Introduction Many applications require enhanced indexing

Stateless DNS

by Daniel Kaiser, Matthias Fratz, Marcel Waldvogel, Valentin Dietrich, Holger Strittmatter
"... Abstract. Several network applications, like service discovery, file dis-covery in P2P networks, distributed hash tables, and distributed caches, use or would benefit from distributed key value stores. The Domain Name System (DNS) is a key value store which has a huge infrastructure and is accessibl ..."
Abstract - Cited by 1 (1 self) - Add to MetaCart
Abstract. Several network applications, like service discovery, file dis-covery in P2P networks, distributed hash tables, and distributed caches, use or would benefit from distributed key value stores. The Domain Name System (DNS) is a key value store which has a huge infrastructure

Supporting top-k join queries in relational databases

by Ihab F. Ilyas, Walid G. Aref, Ahmed K. Elmagarmid - In VLDB , 2003
"... Abstract. Ranking queries, also known as top-k queries, produce results that are ordered on some computed score. Typically, these queries involve joins, where users are usually interested only in the top-k join results. Top-k queries are dominant in many emerging applications, e.g., multimedia retri ..."
Abstract - Cited by 143 (14 self) - Add to MetaCart
on variants of ripple join that implement the rank-join algorithm. The operators are nonblocking and can be integrated into pipelined execution plans. We also propose an efficient heuristic designed to optimize a top-k join query by choosing the best join order. We address several practical issues
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