DBMSs Should Talk Back Too (2009)
Yannis Ioannidis, Alkis Simitsis
Natural language user interfaces to database systems have been studied for several decades now. They have mainly focused on parsing and interpreting natural language queries to generate them in a...
DBMSs Should Talk Back Too (2009)
Simitsis, Alkis, Ioannidis, Yannis
Natural language user interfaces to database systems have been studied for several decades now. They have mainly focused on parsing and interpreting natural language queries to generate them in a...
<mff AT research.att.com> SIGMOD Executive Committee: (2008)
Raghu Ramakrishnan, Yannis Ioannidis, Mary Fernández, Curtis Dyreson, Mary Fernández, Joachim Hammer, ...
Information Director:
From Information to Interaction: in Pursuit of Task-centred Information Management (2008)
Alan Dix, Akrivi Katifori, Antonella Poggi, Tiziana Catarci, Yannis Ioannidis, Giorgios Lepouras, ...
In this paper we describe two automatic inference mechanisms constructed around a personal ontology with the aim of providing human like assistance for form-filling. This is part of the wider vision...
Managing Soil Science Experiments Using ZOO ¢¡ (http://www.cs.wisc.edu/ ˜ ZOO) (2008)
Yannis Ioannidis, Miron Livny, Anastassia Ailamaki, Arvind Ranganathan, Andrew Therber, Maria Yuin
Matthias Bender, Yannis Ioannidis, Donald Kossmann, Henrik Nottelmann, Hans-jörg Scheck, Gerhard Weikum, ...
The peer-to-peer (P2P) paradigm is an intriguing approach for coping with dynamically evolving federations of loosely coupled digital libraries. In addition to the libraries, user agents with...
Management of and Access to Virtual Electronic Health Records * (2008)
Charalampos Dimitropoulos, Jens-peter Dittrich, Peter M. Fischer, Wilhelm Hasselbring, Yannis Ioannidis, Donald Kossmann, ...
eHealth digital libraries contain electronic artifacts that are generated by different healthcare providers (family doctors, laboratories, hospitals, etc.). An important observation is that this...
HEURISTIC SEARCH IN DAT A BASE SYSTEMS by (2008)
Ru-mei Kung, Eric Hanson, Yannis Ioannidis, Timos Sellis, Leonard Shapiro, Michael Stonebraker
This paper proposes extensions to a relational database system to support the selection and execution of algorithms for shortest path search problems. An expert system can employ this extended DBMS...
December Vol No, Letter Editor-in-chief, David Lomet, Letter Special, Christos Faloutsos, Peter J. Haas, ...
this paper we describe and evaluate several popular techniques for data reduction.
Generalized Containment of Conjunctive Queries (2007)
Yannis Ioannidis, Raghu Ramakrishnan
Conjunctive queries are queries over a relational database, and are composed of the relational algebra operators select, project and cartesian product. In this paper, we study conjunctive queries...
Interoperability via Mapping Objects (2007)
Fragkiskos Pentaris, Yannis Ioannidis
In order to provide end-users with services of better quality, Digital Libraries (DLs) need to be constantly adopting new technologies that are emerging in various related fields, e.g., new metadata...
Personalized Query Routing in Peer-to-Peer Federations of Digital Libraries (2007)
Bender, Matthias, Fuhr, Norbert, Ioannidis, Yannis, Kossman, Donald, Schek, Hans-Jörg, Weikum, Gerhard, ...
Personalization of Queries based on User Preferences (2006)
Koutrika, Georgia, Ioannidis, Yannis
Query Personalization is the process of dynamically enhancing a query with related user preferences stored in a user profile with the aim of providing personalized answers. The underlying idea is...
Personalized Query Routing in Peer-to-Peer Federations of Digital Libraries (2006)
Bender, Matthias, Ioannidis, Yannis, Kossmann, Donald, Nottelmann, Henrik, Scheck, Hans-Jörg, Weikum, Gerhard, ...
This task explores routing of various types of queries (SQL, XQuery, etc.) over a P2P network where, apart from DLs, user agents with powerful personalized tools may participate as peers as well. It...
IQN Routing: Integrating Quality and Novelty in P2P Querying and Ranking (2006)
Michel, Sebastian, Bender, Matthias, Triantafillou, Peter, Weikum, Gerhard, Ioannidis, Yannis, Scholl, Marc H., ...
We consider a collaboration of peers autonomously crawling the Web. A pivotal issue when designing a peer-to-peer (P2P) Web search engine in this environment is \textit{query routing}: selecting a...
Feedback-Driven Structural Query Expansion for Ranked Retrieval of XML Data (2006)
Schenkel, Ralf, Theobald, Martin, Ioannidis, Yannis, Scholl, Marc H., Schmidt, Joachim W., Matthes, Florian, ...
Relevance Feedback is an important way to enhance retrieval quality by integrating relevance information provided by a user. In XML retrieval, feedback engines usually generate an expanded query from...
Information Services for Large-Scale Grids A Case for a Grid Search Engine (2005)
Marios D. Dikaiakos, Marios D. Dikaiakos, Rizos Sakellariou, Rizos Sakellariou, Yannis Ioannidis, Yannis Ioannidis
In this work we present a preliminary study of the issues surrounding the development of Seach Engines for Grid environments. We discuss the need for Grid Search Engines, that would enable the...
Java SUN developers Dev Journal: Top 10 Java guides (2005)
Yannis Ioannidis, Georgia Koutrika
docs Why personalization? During the last decade … Emergence of WWW and handheld electronic devices Information abundance User heterogeneity Human effort User-centered information access
Digital Library Information-Technology Infrastructures (2005)
Ioannidis, Yannis, Maier, David, Abiteboul, Serge, Buneman, Peter, Davidson, Susan, Fox, Edward, ...
This paper charts a research agenda on systems-oriented issues in digital libraries. It focuses on the most central and generic system issues, including system architecture, user-level functionality,...
Challenges of Distributed Search Across Digital Libraries (2005)
Bender, Matthias, Michel, Sebastian, Weikum, Gerhard, Zimmer, Christian, Weikum, Gerhard, Ioannidis, Yannis, ...
We present the MINERVA project that tackles the problem of collaborative search across a large number of digital libraries. The search engine is layered on top of a Chord-style peer-to-peer overlay...
Personalized Query Routing in Peer-to-Peer Federations of Digital Libraries (2005)
Bender, Matthias, Ioannidis, Yannis, Nottelmann, Henrik, Schek, Hans-Jörg, Weikum, Gerhard, Zezula, Pavel, ...
OntoPIM: How to Rely on a Personal Ontology for Personal Information Management (2005)
Vivi Katifori, Antonella Poggi, Monica Scannapieco, Tiziana Catarci, Yannis Ioannidis
Nowadays, our personal computer contains a huge amount of information, that is stored in several different formats, including emails, pictures, text documents, media file, address books, etc. When we...
Approximate XML query answers (2004)
Neoklis Polyzotis, Minos Garofalakis, Yannis Ioannidis
The rapid adoption of XML as the standard for data representation and exchange foreshadows a massive increase in the amounts of XML data collected, maintained, and queried over the Internet or in...
Approximate XML query answers (2004)
Neoklis Polyzotis, Minos Garofalakis, Yannis Ioannidis
The rapid adoption of XML as the standard for data representation and exchange foreshadows a massive increase in the amounts of XML data collected, maintained, and queried over the Internet or in...
Search engines for the grid: a research agenda (2004)
Marios Dikaiakos, Yannis Ioannidis, Rizos Sakellariou
Abstract. A preliminary study of the issues surrounding a seach engine for Grid environments, GRISEN, that would enable the provision of a variety of Grid information services, such as locating...
Search engines for the grid: a research agenda (2004)
Marios Dikaiakos, Yannis Ioannidis, Rizos Sakellariou
A preliminary study of the issues surrounding a seach engine for Grid environments, GRISEN, that would enable the provision of a variety of Grid information services, such as locating useful...
The history of histograms (abridged (2003)
The history of histograms is long and rich, full of detailed information in every step. It includes the course of histograms in different scientific fields, the successes and failures of histograms...
Serge Abiteboul, Rakesh Agrawal, Phil Bernstein, Mike Carey, Stefano Ceri, Bruce Croft, ...
This report summarizes the discussion and conclusions of the sixth ad-hoc meeting held May 4-6, 2003 in Lowell, Mass. It observes that information management continues to be a critical component of...
Dynamic histograms: Capturing evolving data sets (2000)
Donko Donjerkovic, Yannis Ioannidis, Raghu Ramakrishnan
In this paper, we introduce dynamic histograms, which are constructed and maintained incrementally. We develop several dynamic histogram construction algorithms and show that they come close to...
William Dumouchel, Christos Faloutsos, Peter J. Haas, Joseph M. Hellerstein, Yannis Ioannidis, H. V. Jagadish, ...
The Bulletin of the Technical Committee on Data Engineering is published quarterly and is distributed to all TC members. Its scope includes the design, implementation, modelling, theory and...
December Vol, Christos Faloutsos, Peter J. Haas, Joseph M. Hellerstein, Yannis Ioannidis, H. V. Jagadish, ...
this paper we describe and evaluate several popular techniques for data reduction. Historically, the primary need for data reduction has been internal to a database system, in a cost-based query...
Conjunctive Query Equivalence of Keyed Relational Schemas (1997)
Joseph Albert, Yannis Ioannidis, Raghu Ramakrishnan
The notion of when two schemas are equivalent is fundamental to database design, schema integration, and data model translation. An important notion of schema equivalence, query equivalence was...
The New Jersey Data Reduction Report (1997)
Daniel Barbar'a, William Dumouchel, Christos Faloutsos, Peter J. Haas, Joseph M. Hellerstein, Yannis Ioannidis, ...
this paper we describe and evaluate several popular techniques for data reduction. Historically, the primary need for data reduction has been internal to a database system, in a cost-based query...
Managing Soil Science Experiments Using ZOO (1997)
Yannis Ioannidis, Miron Livny, Anastassia Ailamaki, Arvind Ranganathan, Andrew Therber, Maria Yuin, ...
Introduction Over the past three years, in collaboration with several domain scientists, we have studied the needs of a wide range of experimental disciplines, developed solutions to some of the...
C.: The New Jersey Data Reduction Report (1997)
Daniel Barbara, William Dumouchel, Christos Faloutsos, Peter J. Haas, Joseph M. Hellerstein, Yannis Ioannidis, ...
There is often a need to get quick approximate answers from large databases. This leads to a need for data reduction. There are many di erent approaches to this problem, some of them not...
User-Oriented Visual Layout at Multiple Granularities (1996)
Yannis Ioannidis, Miron Livny, Jian Bao, Eben M. Haber
Among existing tools for laying out large collections of visual objects, some perform automatic layouts, possibly following some rules prespecified by the user, e.g., graph layout tools, while others...
ZOO: A Desktop Experiment Management Environment (1996)
Yannis Ioannidis, Miron Livny, Shivani Gupta, Nagavamsi Ponnekanti
Over the last decade, a dramatic increase has been observed in the ability of individual experimental scientists to generate and store data, which has not been matched by an equivalent development of...
Parametric Query Processing (1992)
Neoklis Polyzotis, Yannis Ioannidis
Speculation is an every day phenomenon whereby one acts in anticipation of particular conditions that are likely to hold in the future. Computer science research has seen many successfull...