CiteSeerX — Author Search Results — "Apostolos Papadopoulos"

Structure-Based Similarity Search with Graph Histograms
by Apostolos Papadopoulos, Yannis Manolopoulos — 1999 — In Proceedings of the 10th International Workshop on Database & Expert Systems Applications
…Objects like road networks, CAD/CAM components, electrical or electronic circuits, molecules, can be represented as graphs, in many modern applications. In this paper, we propose an efficient and effective graph manipulation technique that can be used in graph-based similarity search. Given a query …
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Parallel Bulk-Loading of Spatial Data
by Apostolos Papadopoulos , Yannis Manolopoulos — 2003 — PARALLEL COMPUTING
…Spatial database systems have been introduced in order to support non-traditional data types and more complex queries. Although bulk-loading techniques for access methods have been studied in the spatial database literature, parallel bulk-loading has not been addressed in a parallel spatial database…
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Multiple Range Query Optimization in Spatial Databases
by Apostolos Papadopoulos, Yannis Manolopoulos — 1998 — In Proc. of the 2nd East European Symp. on Advances in Databases and Information Systems (ADBIS
…In order to answer efficiently range queries in 2-d R-trees, first we sort queries by means of a space filling curve, then we group them together, and finally pass them for processing. Initially, we consider grouping of pairs of requests only, and give two algorithms with exponential and linear comp…
Cited by 3 (0 self) – Add To MetaCart

Distributed Processing of Similarity Queries
by Apostolos Papadopoulos, Yannis Manolopoulos — 2001
…Many modern applications in diverse fields demand the efficient manipulation of very large multidimensional datasets. It is evident, that efficient and effective query processing techniques need to be developed, in order to provide acceptable response times in query processing. In this paper, we stu…
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Performance of Nearest Neighbor Queries in R-trees
by Apostolos Papadopoulos, Yannis Manolopoulos — 1997
…Abstract. Nearest neighbor (NN) queries are posed very frequently in spatial applications. Recently a branch-and-bound algorithm based on R-trees has been developed in order to answer efficiently NN queries. In this paper, we combine techniques that were inherently used for the analysis of range and…
Cited by 27 (5 self) – Add To MetaCart

Structure-Based Similarity Search with Graph Histograms
by Apostolos Papadopoulos And, Apostolos N. Papadopoulos, Yannis Manolopoulos — 1999 — In Proceedings of the 10th International Workshop on Database & Expert Systems Applications
…Objects like road networks, CAD/CAM components, electrical or electronic circuits, molecules, can be represented as graphs, in many modern applications. In this paper, we propose an efficient and effective graph manipulation technique that can be used in graph-based similarity search. Given a query …
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The BASIS System: a Benchmarking Approach for Spatial Index Structures
by Christophe Gurret, Apostolos Papadopoulos, Yannis Manolopoulos, Philippe Rigaux — 1999 — In Intl. Workshop on Spatio-Temporal Database Management (STDBM'99), LNCS 1678
…This paper describes the design of the BASIS prototype system, which is currently under implementation. BASIS stands for Benchmarking Approach for Spatial Index Structures. It is a prototype system aiming at performance evaluation of spatial access methods and query processing strategies, under diff…
Cited by 4 (3 self) – Add To MetaCart

Content-based music information retrieval in wireless ad-hoc networks
by Ioannis Karydis, Alexandros Nanopoulos, Apostolos Papadopoulos, Dimitrios Katsaros, Yannis Manolopoulos — 2005 — in Proc. ISMIR Symp
…This paper, introduces the application of Content-Based Music Information Retrieval (CBMIR) in wireless ad-hoc networks. We investigate for the first time the challenges posed by the wireless medium and recognise the factors that require optimisation. We propose novel techniques, which attain a sign…
Cited by 1 (1 self) – Add To MetaCart

Continuous trendbased classification of streaming time series
by Maria Kontaki, Apostolos N. Papadopoulos, Yannis Manolopoulos — 2005 — in Proc. ADBIS 2005: Ninth EastEuropean Conference on Advances in Databases and Information Systems, Tallin, Estonia Korn F., Jagadish H., Faloutsos C
…Abstract. Trend analysis of time series data is an important research direction. In streaming time series the problem is more challenging, taking into account the fact that new values arrive for the series, probably in very high rates. Therefore, effective and efficient methods are required in order…
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Processing distance join queries with constraints
by Apostolos N. Papadopoulos, Ros Nanopoulos, Yannis Manolopoulos — 2006 — The Computer Journal
…Distance join queries are used in many modern applications, such as spatial databases, spatiotemporal databases and data mining. One of the most common distance join queries is the closestpair query (CPQ). Given two datasets DA and DB the CPQ retrieves the pair (a, b), where a 2DA and b 2DB, having …
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