@article {Spiliopoulou1996341,
	title = {A cost model for the estimation of query execution time in a parallel environment supporting pipeline},
	journal = {Computers and Artificial Intelligence},
	volume = {15},
	number = {4},
	year = {1996},
	note = {cited By (since 1996) 3},
	pages = {341-368},
	abstract = {We propose a model for the estimation of query execution time in an environment supporting bushy and pipelined parallelism. We consider a parallel architecture of processors having private main memories, accessing a shared secondary storage and communicating to each other via a network. For this environment, we compute the cost of query operators when processed in isolation and when in pipeline mode. We use those formulae to incrementally compute the cost of a query execution plan from its components. Our cost model can be incorporated to any optimizer for parallel query processing that considers parallel and pipelined execution of the query operators.},
	url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-33747804589\&partnerID=40\&md5=e04ec1604249525ebaf3dfb111a34f12},
	author = {M. Spiliopoulou and M. Hatzopoulos and Costas Vassilakis}
}
@article {1993-spiliopoulou-cai,
	title = {Parallel Optimisation of Join Queries Using a Technique of Exhaustive Nature},
	journal = {Computers and Artificial Intelligence},
	volume = {12},
	number = {2},
	year = {1993},
	pages = {145{\textendash}166},
	abstract = {In this study we present a technique for the parallel optimisation of join queries that uses the offered coarse-grain parallelism of the underlying architecture in order to reduce the CPU-bound optimisation overhead. The optimisation technique performs an almost exhaustive search of the solution space for small join queries and gradually, as the number of joins increases, it diverges towards iterative improvement. This technique has been developed on a low-parallelism transputer-based architecture, where its behaviour is studied for the optimisation of queries with many tens of joins.},
	keywords = {databases},
	author = {M. Spiliopoulou and M. Hatzopoulos and Costas Vassilakis}
}
@conference {1992-spiliopoulou-parle,
	title = {Using Parallelism and Pipeline for the Optimisation of Join Queries},
	booktitle = {PARLE {\textquoteright}92: Proceedings of the 4th International PARLE Conference on Parallel Architectures and Languages Europe},
	year = {1992},
	month = {6},
	pages = {279{\textendash}294},
	publisher = {Springer-Verlag},
	organization = {Springer-Verlag},
	address = {London, UK},
	abstract = {In this study we present a technique for the parallel optimisation of join queries, that uses the offered coarse-grain parallelism of the underlying architecture in order to reduce the CPU-bound optimisation overhead. The optimisation technique performs an almost exhaustive search of the solution space for small join queries and gradually, as the number of joins increases, it diverges towards iterative improvement. This technique has been developed on a low-parallelism transputer-based architecture, where its behaviour is studied for the optimisation of queries with many tenths of joins.},
	isbn = {3-540-55599-4},
	doi = {10.1007/3-540-55599-4_94},
	author = {M. Spiliopoulou and M. Hatzopoulos and Costas Vassilakis}
}
@conference {1990-hatzopoulos-delta,
	title = {An Object-Oriented Data Model for Hypermedia Systems},
	booktitle = {Proceedings of the DELTA Conference in Research and Development},
	year = {1990},
	month = {10},
	pages = {483{\textendash}493},
	abstract = {Hypermedia [1] is a fast growing field of research interest because of the new aspects introduced as far as it concerns the interaction between the machine and the user. The innovative features mainly refer to - the presence of various information types (multimedia environment) - the mapping of the semantic connections between information items into a flexible, efficient representation. This feature enables navigation through the information network in a meaningful way. Our effort concentrated on the definition and partial implementation of a flexible, general-purpose model through which the full capabilities of object-oriented programming can be exploited.},
	keywords = {databases},
	url = {http://cst.uop.gr/images/papers/1990-hatzopoulos-delta.pdf},
	author = {M. Hatzopoulos and D. Gouscos and M. Spiliopoulou and Costas Vassilakis and M. Vazirgiannis}
}
