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On the Hardness and Approximation of Euclidean DBSCAN

DBSCAN is a method proposed in 1996 for clustering multi-dimensional points, and has received extensive applications. Its computational hardness is... (more)

Efficient SimRank-Based Similarity Join

Graphs have been widely used to model complex data in many real-world applications. Answering vertex join queries over large graphs is meaningful and interesting, which can benefit friend recommendation in social networks and link prediction, and so on. In this article, we adopt “SimRank” [13] to evaluate the similarity between two... (more)

Query Nesting, Assignment, and Aggregation in SPARQL 1.1

Answering aggregate queries is a key requirement of emerging applications of Semantic Technologies, such as data warehousing, business intelligence,... (more)

Detecting Inclusion Dependencies on Very Many Tables

Detecting inclusion dependencies, the prerequisite of foreign keys, in relational data is a challenging task. Detecting them among the hundreds of... (more)

DBSCAN Revisited, Revisited

At SIGMOD 2015, an article was presented with the title “DBSCAN Revisited: Mis-Claim, Un-Fixability, and Approximation” that won the conference’s best paper award. In this technical correspondence, we want to point out some inaccuracies in the way DBSCAN was represented, and why the criticism should have been directed at the... (more)

NEWS

Updates to the TODS Editorial Board

As of January 1, 2017, three Associate Editors, Paolo Ciaccia, Divyakant Agrawal, and Sihem Amer-Yahia, ended their terms, each having served on the editorial board for some six years. In addition, they will stay on until they complete their current loads. We are fortunate that they have donated their time and world-class expertise during these years. Also three new Associate Editors have joined the editorial board: Feifei Li, University of Utah, Kian-Lee Tan, National University of Singapore, and Jeffrey Xu Yu, Chinese University of Hong Kong. All three are highly regarded scholars in database systems. 

Please read more here.

Changes to the TODS Editorial Board

As of January 1, 2016, five Associate Editors, Wenfei Fan, Chris Jermaine, Tova Milo, Lucian Popa, and Divesh Srivastava, ended their terms, having served on the editorial board for six, or between six and seven, years. In addition, they will stay on until they complete their current loads. We are fortunate that they have donated their time and world-class expertise during these years. Also five new Associate Editors have joined the editorial board: Marcelo Arenas, Gao Cong, Torsten Grust, Peter Haas, and Wim Martens.

Please read more here.

Forthcoming Articles
BonXai: Combining the simplicity of DTD with the expressiveness of XML Schema

While the migration from DTD to XML Schema was driven by a need for increased expressivity and flexibility, the latter was also significantly more complex to use and understand. Whereas DTDs are characterized by their simplicity, XML Schema Definitions are notoriously difficult. In this article, we introduce the XML specification language BonXai which possesses most features of XML Schema, including its expressivity, while retaining the simplicity of DTDs. In brief, the latter is achieved by sacrificing the explicit use of types in favor of simple patterns expressing contexts for elements. The goal of BonXai is by no means to replace XML Schema, but rather to provide a simpler DTD-like alternative to schema designers that do not need the explicit use of types. Therefore, BonXai can be seen as a practical front-end for XML Schema. A particular strong point of BonXai is its solid foundation rooted in a decade of theoretical work around pattern-based schemas. We present in detail the formal model for BonXai and discuss translation algorithms to and from XML Schema.

Coordination Analysis and Placement for Distributed Programs

Distributed consistency is perhaps the most-discussed topic in distributed systems today. Coordination protocols can ensure consistency, but in practice they cause undesirable performance unless used judiciously. Scalable distributed architectures avoid coordination whenever possible, but under-coordinated systems can exhibit behavioral anomalies under fault, which are often extremely difficult to debug. This raises significant challenges for distributed system architects and developers. In this paper we present Crow, a cross-platform program analysis framework that (a) identifies program locations that require coordination to ensure consistent executions, and (b) automatically synthesizes application-specific coordination code that can significantly outperform general-purpose techniques. We present two case studies, one using annotated programs in the Twitter Storm system, and another using the Bloom declarative language.

EmptyHeaded: A Relational Engine for Graph Processing

There are two types of high-performance graph processing engines: low- and high-level engines. Low-level engines (Galois, PowerGraph, Snap) provide optimized data structures and computation models but require users to write low-level imperative code, hence ensuring that efficiency is the burden of the user. In high- level engines, users write in query languages like datalog (SociaLite) or SQL (Grail). High-level engines are easier to use but are orders of magnitude slower than the low-level graph engines. We present Emp- tyHeaded, a high-level engine that supports a rich datalog-like query language and achieves performance comparable to that of low-level engines. At the core of EmptyHeadeds design is a new class of join algorithms that satisfy strong theoretical guarantees, but have thus far not achieved performance comparable to that of specialized graph processing engines. To achieve high performance, EmptyHeaded introduces a new join engine architecture, including a novel query optimizer and execution engine that leverage single-instruction multiple data (SIMD) parallelism. With this architecture, EmptyHeaded outperforms high-level approaches by up to three orders of magnitude on graph pattern queries, PageRank, and Single-Source Shortest Paths (SSSP) and is an order of magnitude faster than many low-level baselines. We validate that EmptyHeaded competes with the best-of-breed low-level engine (Galois), achieving comparable performance on PageRank and at most 3x worse performance on SSSP. Finally, we show that the EmptyHeaded design can easily be extended to accommodate a standard resource description framework (RDF) workload, the LUBM bench- mark. On the LUBM benchmark, we show that EmptyHeaded can compete with and sometimes outperform two high-level, but specialized RDF baselines (TripleBit and RDF-3X), while outperforming MonetDB by up to by three orders of magnitude and LogicBlox by up by two orders of magnitude.

Designing a Query Language for RDF: Marrying Open and Closed Worlds

When querying an RDF graph, a prominent feature is the possibility of extending the answer to a query with optional information. However, the definition of this feature in SPARQL -the standard RDF query language- has raised some important issues. Most notably, the use of this feature increases the complexity of the evaluation problem, and its closed-world semantics is in conflict with the underlying open-world semantics of RDF. Many approaches for fixing such problems have been proposed, being the most prominent the introduction of the semantic notion of weakly-monotone SPARQL query. Weakly-monotone SPARQL queries have shaped the class of queries that conform to the open-world semantics of RDF. Unfortunately, finding an effective way of restricting SPARQL to the fragment of weakly-monotone queries has proven to be an elusive problem. In practice, the most widely adopted fragment for writing SPARQL queries is based on the syntactic notion of well designedness. This notion has proven to be a good approach for writing SPARQL queries, but its expressive power has yet to be fully understood. The starting point of this paper is to understand the relation between well-designed queries and the semantic notion of weak monotonicity. It is known that every well-designed SPARQL query is weakly monotone; as our first contribution we prove that the converse does not hold, even if an extension of this notion based on the use of disjunction is considered. Given this negative result, we embark on the task of defining syntactic fragments that are weakly-monotone, and have higher expressive power than the fragment of well-designed queries. To this end, we move to a more general scenario where infinite RDF graphs are also allowed, so that interpolation techniques studied for first-order logic can be applied. With the use of these techniques, we are able to define a new operator for SPARQL that gives rise to a query language with the desired properties (over finite and infinite RDF graphs). It should be noticed that every query in this fragment is weakly monotone if we restrict to the case of finite RDF graphs. Moreover, we use this result to provide a simple characterization of the class of monotone CONSTRUCT queries, that is, the class of SPARQL queries that produce RDF graphs as output. Finally, we pinpoint the complexity of the evaluation problem for the query languages identified in the paper.

Linear Time Membership in a Class of Regular Expressions with Counting, Interleaving and Unordered Concatenation

Regular Expressions (REs) are ubiquitous in database and programming languages. While many applications make use of REs extended with interleaving (shuffle) and unordered concatenation operators, this extension badly affects the complexity of basic operations, and, especially, makes membership NP-hard, which is unacceptable in most practical scenarios. In this paper we study the problem of membership checking for a restricted class of these extended REs, called conflict-free REs, which are expressive enough to cover the vast majority of real-world applications. We present several polynomial algorithms for membership checking over conflict-free REs. The algorithms are all polynomial and differs in terms of adopted optimisation techniques, and in the kind of supported operators. As a particular application, we generalise the approach in order to check membership of XML trees into a class of EDTDs which models the crucial aspects of DTDs and XSD schemas. Results about an extensive experimental analysis validate the efficiency of the presented membership checking techniques.

Declarative Probabilistic Programming with Datalog

Probabilistic programming languages are used for developing statistical models, and they typically consist of two components: a specification of a stochastic process (the prior), and a specification of observations that restrict the probability space to a conditional subspace (the posterior). Use cases of such formalisms include the development of algorithms in machine learning and artificial intelligence. We propose and investigate an extension of Datalog for specifying statistical models, and establish a declarative probabilistic- programming paradigm over databases. Our proposed extension provides convenient mechanisms to include common numerical probability functions; in particular, conclusions of rules may contain values drawn from such functions. The semantics of a program is a probability distribution over the possible outcomes of the input database with respect to the program. Observations are naturally incorporated by means of integrity constraints over the extensional and intensional relations. The resulting semantics is robust under different chases and invariant to rewritings that preserve logical equivalence.

Bibliometrics

Publication Years 1976-2017
Publication Count 952
Citation Count 31635
Available for Download 952
Downloads (6 weeks) 2801
Downloads (12 Months) 31905
Downloads (cumulative) 809523
Average downloads per article 850
Average citations per article 33
First Name Last Name Award
Serge Abiteboul ACM Fellows (2011)
Foto Afrati ACM Fellows (2014)
Pankaj Agarwal ACM Fellows (2002)
Charu Chandra Aggarwal ACM Fellows (2013)
Divyakant Agrawal ACM Fellows (2011)
ACM Distinguished Member (2010)
ACM Senior Member (2008)
Rakesh Agrawal ACM Fellows (2003)
Alfred V Aho ACM Fellows (1996)
Alex Aiken ACM Fellows (2008)
Anastasia Ailamaki ACM Fellows (2015)
Eric Allman ACM Distinguished Member (2009)
Gustavo Alonso ACM Fellows (2012)
Sihem Amer-Yahia ACM Senior Member (2007)
Mikhail Atallah ACM Fellows (2006)
Algirdas Avizienis ACM-IEEE CS Eckert-Mauchly Award (2012)
Peter Bailis ACM Doctoral Dissertation Award (2016)
Hari Balakrishnan ACM Fellows (2008)
ACM Doctoral Dissertation Award (1998)
Catriel Beeri ACM Fellows (2007)
Philip A Bernstein ACM Fellows (2001)
Elisa Bertino ACM Fellows (2003)
Jose A Blakeley ACM Fellows (2009)
Michael W Blasgen ACM Fellows (1994)
ACM Programming Systems and Languages Paper Award (1982)
Peter Buneman ACM Fellows (2000)
Luca Cardelli ACM Fellows (2004)
Michael J Carey ACM Fellows (2000)
Rick Cattell ACM Fellows (2012)
Stefano Ceri ACM Fellows (2013)
Donald Chamberlin ACM Fellows (1994)
ACM Software System Award (1988)
Surajit Chaudhuri ACM Fellows (2005)
Peter P Chen ACM Fellows (1998)
Panos K Chrysanthis ACM Distinguished Member (2010)
ACM Senior Member (2007)
Edgar F Codd ACM Fellows (1994)
ACM A. M. Turing Award (1981)
Graham R. Cormode ACM Distinguished Member (2013)
William J Dally ACM-IEEE CS Eckert-Mauchly Award (2010)
ACM Fellows (2002)
Susan B Davidson ACM Fellows (2001)
Umeshwar Dayal ACM Fellows (2008)
David DeWitt ACM Software System Award (2008)
ACM Fellows (1995)
Dorothy E Denning ACM Fellows (1995)
Peter J Denning Outstanding Contribution to ACM Award (1998)
ACM Karl V. Karlstrom Outstanding Educator Award (1996)
ACM Fellows (1994)
ACM Distinguished Service Award (1989)
ACM Programming Systems and Languages Paper Award (1971)
David P Dobkin ACM Fellows (1997)
Amr El Abbadi ACM Fellows (2010)
Carla S. Ellis ACM Fellows (2010)
ACM Distinguished Member (2009)
Ahmed Elmagarmid ACM Fellows (2012)
ACM Distinguished Member (2009)
Martin Erwig ACM Senior Member (2008)
Ronald Fagin ACM Fellows (2000)
Christos Faloutsos ACM Fellows (2010)
Wenfei Fan ACM Fellows (2012)
Jane Fedorowicz ACM Senior Member (2014)
Joan Feigenbaum ACM Fellows (2001)
Alan D Fekete ACM Distinguished Member (2006)
Domenico Ferrari ACM Fellows (2001)
Elena Ferrari ACM Distinguished Member (2011)
Peter A. Franaszek ACM Paris Kanellakis Theory and Practice Award (2002)
Michael J Franklin ACM Fellows (2005)
Hector Garcia-Molina ACM Fellows (1997)
Minos Garofalakis ACM Distinguished Member (2011)
ACM Senior Member (2009)
Shahram Ghandeharizadeh ACM Software System Award (2008)
Phillip B Gibbons ACM Fellows (2006)
Calvin C. Gotlieb Outstanding Contribution to ACM Award (2011)
ACM Presidential Award (2002)
ACM Fellows (1994)
Georg Gottlob ACM Fellows (2007)
Goetz Graefe ACM Software System Award (2008)
Jim Gray ACM A. M. Turing Award (1998)
ACM Fellows (1994)
ACM Software System Award (1988)
ACM Programming Systems and Languages Paper Award (1982)
Rachid Guerraoui ACM Fellows (2012)
Peter Haas ACM Fellows (2013)
Donald J Haderle ACM Fellows (2000)
Jiawei Han ACM Fellows (2003)
Jayant R Haritsa ACM Fellows (2015)
ACM Distinguished Member (2009)
Robert L. Hartmann ACM Senior Member (2009)
Gernot Heiser ACM Fellows (2014)
ACM Senior Member (2009)
Gerald Held ACM Software System Award (1988)
Joseph M Hellerstein ACM Fellows (2009)
Maurice Herlihy ACM Fellows (2005)
Richard Hull ACM Fellows (2007)
Ihab F. Ilyas ACM Distinguished Member (2014)
Piotr Indyk ACM Fellows (2015)
ACM Paris Kanellakis Theory and Practice Award (2012)
Yannis E Ioannidis ACM Fellows (2004)
H V Jagadish ACM Fellows (2003)
Christian S. Jensen ACM Fellows (2011)
Anita K Jones ACM Fellows (1996)
Richard Karp ACM Fellows (1994)
ACM A. M. Turing Award (1985)
Randy H. Katz ACM Karl V. Karlstrom Outstanding Educator Award (1999)
ACM Fellows (1996)
Zvi Kedem Outstanding Contribution to ACM Award (2012)
ACM Fellows (1997)
Anne-Marie Kermarrec ACM Fellows (2016)
Won Kim ACM Distinguished Service Award (2001)
Phokion G Kolaitis ACM Fellows (2005)
Henry F Korth ACM Fellows (2000)
Donald Kossmann ACM Fellows (2010)
Hans-Peter Kriegel ACM Fellows (2009)
David J Kuck ACM-IEEE CS Ken Kennedy Award (2010)
ACM Fellows (1994)
ACM-IEEE CS Eckert-Mauchly Award (1993)
Richard E. Ladner ACM Fellows (1995)
Laks Lakshmanan ACM Distinguished Member (2016)
Leslie Lamport ACM Fellows (2014)
ACM A. M. Turing Award (2013)
Per-Ake Larson ACM Fellows (2004)
Der-Tsai Lee ACM Fellows (1997)
Philip M Lewis ACM Fellows (1999)
Leonid Libkin ACM Fellows (2012)
Bruce Lindsay ACM Fellows (1994)
ACM Programming Systems and Languages Paper Award (1982)
Tok Wang Ling ACM Distinguished Member (2009)
ACM Senior Member (2009)
Richard Lipton ACM Fellows (1997)
Witold Litwin ACM Fellows (2001)
Jorge Lobo ACM Distinguished Member (2009)
David B Lomet ACM Fellows (2002)
Raymond A Lorie ACM Fellows (2000)
ACM Software System Award (1988)
ACM Programming Systems and Languages Paper Award (1982)
Nancy Lynch ACM Athena Lecturer Award (2012)
ACM Fellows (1997)
David Maier ACM Fellows (1998)
Yossi Matias ACM Fellows (2009)
Paul R McJones ACM Fellows (1994)
ACM Programming Systems and Languages Paper Award (1982)
Daniel Menasce ACM Fellows (1997)
Renee J Miller ACM Fellows (2009)
Tova Milo ACM Fellows (2012)
Jack Minker ACM AAAI Allen Newell Award (2005)
ACM Fellows (1994)
Outstanding Contribution to ACM Award (1985)
Mohamed F Mokbel ACM Senior Member (2013)
Todd C Mowry ACM Fellows (2016)
Richard R Muntz ACM Fellows (1996)
S. Muthukrishnan ACM Fellows (2010)
Mario A Nascimento ACM Senior Member (2007)
Jeffrey F Naughton ACM Software System Award (2008)
ACM Fellows (2002)
Shamkant B Navathe ACM Fellows (2014)
J Nievergelt ACM Fellows (1995)
Beng Chin Ooi ACM Fellows (2011)
Zehra Ozsoyoglu ACM Fellows (2011)
M. Tamer Ozsu ACM Fellows (2006)
Christos Papadimitriou ACM Fellows (2001)
Jignesh M Patel ACM Fellows (2014)
ACM Distinguished Member (2011)
Jian Pei ACM Fellows (2015)
ACM Senior Member (2007)
Nicholas Pippenger ACM Fellows (1997)
Lucian Popa ACM Senior Member (2012)
Thomas G Price ACM Programming Systems and Languages Paper Award (1982)
Vijay V Raghavan ACM Distinguished Member (2012)
Raghu Ramakrishnan ACM Fellows (2001)
Krithivasan Ramamritham ACM Fellows (2001)
Louiqa Raschid ACM Fellows (2016)
ACM Distinguished Member (2008)
Rajeev Ramnarain Rastogi ACM Fellows (2012)
Arnold Rosenberg ACM Fellows (1996)
Daniel J Rosenkrantz ACM Fellows (1995)
Nick Roussopoulos ACM Fellows (2001)
Domenico Sacca ACM Senior Member (2007)
Gerard Salton ACM Fellows (1995)
Hanan Samet ACM Paris Kanellakis Theory and Practice Award (2011)
ACM Fellows (1996)
Hans-Joerg Schek ACM Fellows (2001)
Donovan A Schneider ACM Software System Award (2008)
Assaf Schuster ACM Fellows (2015)
Timoleon Sellis ACM Fellows (2013)
ACM Senior Member (2008)
Kenneth C Sevcik ACM Fellows (1997)
Cyrus Shahabi ACM Distinguished Member (2009)
Dennis E Shasha ACM Fellows (2013)
Scott J Shenker ACM Fellows (2003)
Prashant J Shenoy ACM Distinguished Member (2009)
ACM Senior Member (2006)
Kyuseok Shim ACM Fellows (2013)
Ben Shneiderman ACM Fellows (1997)
Abraham Silberschatz ACM Karl V. Karlstrom Outstanding Educator Award (1998)
ACM Fellows (1996)
Donald R Slutz ACM Fellows (1994)
ACM Programming Systems and Languages Paper Award (1971)
Alan Smith ACM Fellows (2001)
Richard T Snodgrass Outstanding Contribution to ACM Award (2004)
ACM Fellows (1999)
Larry Snyder ACM Fellows (1995)
Divesh Srivastava ACM Fellows (2011)
Richard E Stearns ACM Fellows (1994)
ACM A. M. Turing Award (1993)
Ion Stoica ACM Fellows (2012)
ACM Doctoral Dissertation Award (2001)
Michael Stonebraker ACM A. M. Turing Award (2014)
ACM Fellows (1994)
ACM Software System Award (1988)
Dan Suciu ACM Fellows (2011)
S. Sudarshan ACM Fellows (2014)
Wang-Chiew Tan ACM Fellows (2015)
Val Tannen ACM Fellows (2013)
Robert E Tarjan ACM Paris Kanellakis Theory and Practice Award (1999)
ACM Fellows (1994)
ACM A. M. Turing Award (1986)
Robert W Taylor ACM Fellows (1994)
ACM Software System Award (1984)
Srikanta N Tirthapura ACM Senior Member (2009)
Frank Wm Tompa ACM Fellows (2010)
Irv Traiger ACM Fellows (1994)
ACM Software System Award (1988)
ACM Programming Systems and Languages Paper Award (1982)
ACM Programming Systems and Languages Paper Award (1971)
Joseph Traub ACM Fellows (1994)
Jeffrey D Ullman ACM Karl V. Karlstrom Outstanding Educator Award (1997)
ACM Fellows (1995)
Patrick Valduriez ACM Fellows (2012)
Moshe Y Vardi ACM Presidential Award (2017)
Outstanding Contribution to ACM Award (2009)
ACM Presidential Award (2008)
ACM Paris Kanellakis Theory and Practice Award (2005)
ACM Fellows (2000)
Santosh Vempala ACM Fellows (2015)
Jeffrey S Vetter ACM Distinguished Member (2012)
ACM Gordon Bell Prize
Performance (2010)
Victor Vianu ACM Fellows (2006)
David S Warren ACM Fellows (2000)
Anthony I Wasserman ACM Fellows (1996)
Gerhard Weikum ACM Fellows (2005)
Mark Allen Weiss ACM Distinguished Member (2011)
Kyu-Young Whang ACM Fellows (2009)
Jennifer Widom ACM Athena Lecturer Award (2015)
ACM Fellows (2005)
Gio Wiederhold ACM Fellows (1995)
Marianne Winslett ACM Fellows (2006)
Ouri Wolfson ACM Fellows (2001)
Eugene Wong ACM Software System Award (1988)
Kesheng Wu ACM Distinguished Member (2010)
ACM Senior Member (2007)
Yang Xiang ACM Senior Member (2016)
Philip S Yu ACM Fellows (1997)

First Name Last Name Paper Counts
Ronald Fagin 13
Hector Garcia-Molina 13
Philip Bernstein 13
Yufei Tao 12
Wenfei Fan 10
Jeffrey Ullman 10
Richard Snodgrass 10
Phokion Kolaitis 10
Dan Suciu 9
Nathan Goodman 9
Wangchiew Tan 9
Eugene Wong 8
Minos Garofalakis 8
Christian Jensen 8
Hanan Samet 8
Dimitris Papadias 8
Sushil Jajodia 8
Victor Vianu 8
Michael Stonebraker 7
Clement Yu 7
Stefano Ceri 7
Don Batory 7
Meral Özsoyoğlu 7
Raghu Ramakrishnan 7
Serge Abiteboul 7
Hosagrahar Jagadish 7
Luis Gravano 6
Jef Wijsen 6
Surajit Chaudhuri 6
David Dewitt 6
Leonid Libkin 6
Yannis Ioannidis 6
Yehoshua Sagiv 6
Nick Koudas 6
Alberto Mendelzon 6
Marianne Winslett 6
Carlo Zaniolo 6
Won Kim 6
Floris Geerts 6
Graham Cormode 6
VS Subrahmanian 6
Xuemin Lin 6
Michael Böhlen 6
Jennifer Widom 5
Lucian Popa 5
Frank Neven 5
Rudolf Bayer 5
Alin Dobra 5
Susan Davidson 5
Veda Storey 5
Marcelo Arenas 5
Divesh Srivastava 5
Laks Lakshmanan 5
Amr El Abbadi 5
Gültekin Özsoyoglu 5
George Kollios 5
Nikos Mamoulis 5
Stijn Vansummeren 5
Per Larson 5
Catriel Beeri 5
David Shipman 5
Michael Franklin 5
Bengchin Ooi 5
Kotagiri Ramamohanarao 5
Shibing Yao 5
Christopher Jermaine 5
Sharad Mehrotra 5
Ouri Wolfson 5
Benny Kimelfeld 4
Ke Yi 4
Henry Korth 4
David Maier 4
Philip YU 4
Manlung Yiu 4
Yinong Chen 4
Tiko Kameda 4
David Lomet 4
Stavros Christodoulakis 4
Arie Shoshani 4
Phillip Gibbons 4
Alan Fekete 4
Dimitrios Gunopulos 4
Florin Rusu 4
Paolo Ciaccia 4
Ziyang Liu 4
Xiaokui Xiao 4
Shamkant Navathe 4
Raymond Ng 4
Georg Gottlob 4
Mario Schkolnick 4
Dan Olteanu 4
Peter Buneman 4
Nick Roussopoulos 4
Dennis Shasha 4
Jan Chomicki 4
Elke Rundensteiner 4
Pierre Bourhis 4
Joseph Hellerstein 4
Stanley Su 4
Dorothy Denning 4
Sara Cohen 4
Kenneth Sevcik 4
Stefano Paraboschi 4
Michael Carey 4
Michael Benedikt 3
Tova Milo 3
Thomas Schwentick 3
Panagiotis Ipeirotis 3
Eliezer Lozinskii 3
Romulo Gonçalves 3
Vijay Raghavan 3
Panos Kalnis 3
Sebastian Link 3
Luc Segoufin 3
Guy Lohman 3
Toshihide Ibaraki 3
Sergio Flesca 3
Peter Lockemann 3
Pierangela Samarati 3
Jorge Pérez 3
Marios Hadjieleftheriou 3
Marco Patella 3
Neoklis Polyzotis 3
Dmitri Kalashnikov 3
Mankeung Siu 3
Esen Ozkarahan 3
Wim Martens 3
Miron Livny 3
Paolo Tiberio 3
Filippo Furfaro 3
Gustavo Alonso 3
Hamid Pirahesh 3
Gautam Das 3
Edwin Jacox 3
Oded Shmueli 3
Yiping Ke 3
Martin Kersten 3
Christoph Koch 3
Walid Aref 3
Raymond Lorie 3
Arnon Rosenthal 3
Edward Sciore 3
Markus Schneider 3
Piero Fraternali 3
Krithi Ramamritham 3
James Rothnie 3
Cheng Sheng 3
Samuel Madden 3
Yannis Papakonstantinou 3
Nicolas Bruno 3
Thomas Eiter 3
Gio Wiederhold 3
Jan Paredaens 3
Anastasia Ailamaki 3
Bettina Kemme 3
Kenneth Salem 3
Giuseppe Pelagatti 3
Richard Hull 3
Baihua Zheng 3
Wei Wang 3
Bernhard Seeger 3
Ben Shneiderman 3
Toon Calders 3
Ihab Ilyas 3
Arie Segev 3
Divyakant Agrawal 3
Dennis Severance 3
Bradford Wade 3
Gerhard Weikum 3
William Kent 3
Salvatore March 3
Bruce Lindsay 3
Chen Li 3
Pankaj Agarwal 3
Leonid Libkin 3
James Cheng 3
Wilfred Ng 3
Jeffrey Vitter 3
Douglas Comer 3
Rakesh Agrawal 3
Jim Gray 3
Christopher 3
Georgia Koutrika 3
Cyrus Shahabi 3
Sergey Melnik 3
Anthony Klug 3
Alfred Aho 3
Jeffreyxu Yu 3
Goetz Graefe 3
Balder Cate 3
Patrick Valduriez 3
Kevin Chang 3
Elena Baralis 3
David Stemple 3
K Lam 3
Dennis McLeod 3
Walter Burkhard 3
Kianlee Tan 3
Wiebren De Jonge 3
James Clifford 3
Debabrata Dey 3
John Robinson 3
Claudio Gutiérrez 2
Alexander Markowetz 2
Yaacov Weiss 2
Alin Deutsch 2
Yidong Yuan 2
Nicolas Spyratos 2
Liyan Yuan 2
Jian Pei 2
Sven Hartmann 2
Mark Levene 2
Gísli Hjaltason 2
Zhewei Wei 2
Pierre Senellart 2
Sonia Bergamaschi 2
Nikolaus Augsten 2
Haixun Wang 2
Justin Zobel 2
Reind Van De Riet 2
Amit Kumar 2
Fei Xu 2
Michael Siegel 2
Rabia Nuray-Turan 2
Curtis Dyreson 2
Giovanni Sacco 2
Letizia Tanca 2
Antonios Deligiannakis 2
Sudeepa Roy 2
Sławek Staworko 2
MingXi Wu 2
Feifei Li 2
Martin Ester 2
Andrew McGregor 2
Jun Yang 2
Yin Yang 2
Giorgio Ghelli 2
James Cheney 2
Assaf Schuster 2
Michael Bender 2
Ron Obermarck 2
E Babb 2
Calvin Gotlieb 2
Marco Casanova 2
Jiawei Han 2
Torsten Grust 2
Patricia Griffiths 2
Maurice Herlihy 2
Debra Vandermeer 2
Kyriakos Mouratidis 2
Mauro Negri 2
Ting Yu 2
Xiaolei Qian 2
Davide Martinenghi 2
Guoliang Li 2
Claudio Bettini 2
Peter Wood 2
Abhijit Pol 2
Val Tannen 2
John Smith 2
Haodong Hu 2
Bingsheng He 2
Chaitanya Mishra 2
Louiqa Raschid 2
Lee Hollaar 2
Junghoo Cho 2
Dario Colazzo 2
Alan Nash 2
Todd Green 2
John Kam 2
Vagelis Hristidis 2
Patrick O'Neil 2
Johann Gamper 2
Vassilis Athitsos 2
Joseph Wald 2
Williamfrank King 2
H Kung 2
Cristian Riveros 2
Sanjeev Khanna 2
Francesco Parisi 2
Weidong Chen 2
Yannis Manolopoulos 2
Victor Matos 2
Edward, Chan 2
Shivnath Babu 2
Guido Moerkotte 2
C Mohan 2
Michael Kifer 2
Christopher Reeve 2
Kyriacos Pavlou 2
Jan Bussche 2
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Leong U 1
Thaddeus Diamond 1
Yuliang Li 1
Hung Ngo 1
Ellis Horowitz 1
David Reiner 1
Ali Hurson 1
James Westland 1
Richard Cole 1
Yiukai Ng 1
Guoren Wang 1
Luis Perez 1
Christopher Herot 1
J Riordon 1
Haifeng Yu 1
Genoveffa Tortora 1
Lee Sael 1
Jörg Sander 1
T Jayram 1
Pranay Jain 1
Qiang Xue 1
Houtan Aghili 1
Lubomir Bic 1
Betty Salzberg 1
Tsongli Wang 1
Jitender Deogun 1
Wen Jin 1
Rishi Sinha 1
Bin Cao 1
Hiroshi Ishikawa 1
Dennis Sasha 1
Anuj Jaiswal 1
Sudipto Das 1
Massimo Franceschet 1
Angelo Montanari 1
Dingming Wu 1
Luca Pardini 1
Carlo Sartiani 1
Mohamed Khalefa 1
Louis Woods 1
Hector Gonzalez 1
Ada Fu 1
Rachid Guerraoui 1
Patrick Wong 1
Philip Drenick 1
Robert Hagmann 1
Kaushik Chakrabarti 1
Cui Yu 1
Maarten Marx 1
Marc Gyssens 1
Kristen Lefevre 1
Riccardo Torlone 1
Roberto Maiocchi 1
Xiang Lian 1
Ahmed Soror 1
Peter Kokosielis 1
Acar Tamersoy 1
Ruoming Jin 1
Yang Xiang 1
Nicola Onose 1
Yubao Liu 1
Kristian Rietveld 1
Kai Zheng 1
William Armstrong 1
Micael Hammer 1
Junyi Xie 1
Anshuman Dutt 1
Alvin Cheung 1
Armando Solar-Lezama 1
Loredana Caruccio 1
U Kang 1
Weiguo Zheng 1
Tomáš Skopal 1
Surajit Chaudhuri 1
Yunyao Li 1
Xibei Jia 1
Laura Bright 1
Glenn Iwerks 1
Daniel Heyman 1
Daniel Menascé 1
Richard Muntz 1
Sumiyasu Yamamoto 1
Edgar Codd 1
Johann Freytag 1
Fazli Can 1
Andreas Reuter 1
Rahul Shah 1
Chintang Wu 1
Shantanu Joshi 1
Alexandros Ntoulas 1
Alfonso Cárdenas 1
Ada Fu 1
Haibo Hu 1
O Buneman 1
Witold Lipski 1
Peter Kreps 1
Gerald Held 1
Karel Youssefi 1
Yinghui Wu 1
Justin Levandoski 1
Nadathur Satish 1
Bogdan Alexe 1
Evgeny Kharlamov 1
Jeff Ranstrom 1
Eric Allman 1
Francesco Bonchi 1
Elena Ferrari 1
Colin Bell 1
Mark Weiss 1
Michele Missikoff 1
Neil Coburn 1
Per Larson 1
Hao Zhang 1
Abdullah Tansel 1
Lucy Garnett 1
Johannes Gehrke 1
Daniel Lemire 1
Diklun Lee 1
Gad Ariav 1
Tao Qiu 1
Zhuojie Zhou 1
Francesco Gullo 1
Zitong Chen 1
Daniel Deutch 1
Xianmin Liu 1
Peter Chen 1
Samy Mahmoud 1
Jinhong Jung 1
Kijung Shin 1
Thorsten Papenbrock 1
Gianluigi Greco 1
Joshua Spiegel 1
Jürgen Krämer 1
Fabio Fassetti 1
Hongjun Lu 1
Rishiyur Nikhil 1
Peter Ting 1
Harry Wong 1
Angelika Reiser 1
Shinsei Tazawa 1
Mary McLeish 1
Wouter Gelade 1
Joseph Traub 1
Ramaswamy Ramesh 1
Ryohei Nakano 1
Davidihsin Cheng 1
Todd Mowry 1
Giorgos Flouris 1
Irini Fundulaki 1
Kim Nguy˜ˆen 1
Amr El Abbadi 1
Carla Piazza 1
Jan Rittinger 1
Jiying Wang 1

Affiliation Paper Counts
Miami University Oxford 1
Shanghai University of Finance and Economics 1
Universitat Pompeu Fabra 1
Griffith University 1
Public University of Navarrea 1
Alexandria University 1
Concordia University, Montreal 1
U.S. Army Research Laboratory 1
University of Belgrade 1
SAP AG 1
Free Universities of Brussels 1
Schlumberger Limited 1
Amdahl Corporation 1
General Research Corporation 1
Fujitsu Services Limited 1
Siemens USA 1
Universite Paris-Est 1
Niihama National College of Technology 1
King Abdullah University of Science and Technology 1
Academic College of Tel-Aviv - Yaffo 1
Computer Sciences Corp. 1
Zirve University 1
Communaute d'Universites et d'Etablissements Lille Nord de France 1
Hamad bin Khalifa University 1
INRIA Saclay 1
Specifications and Verification Laboratory 1
Oregon Health and Science University 1
Justus Liebig University Giessen 1
University of Tubingen 1
Universite Charles de Gaulle Lille 3 1
Wichita State University 1
Parametric Technology Corporation 1
University of Science and Technology Beijing 1
Wright State University 1
The University of North Carolina at Greensboro 1
Agricultural University of Athens 1
LSI Corporation 1
University of L'Aquila 1
Memorial University of Newfoundland 1
Xerox Corporation 1
Chinese Academy of Sciences 1
James Cook University, Australia 1
Bucknell University 1
University of Liverpool 1
University of Toledo 1
University College London 1
University of Macau 1
Open University of Israel 1
University of Bari 1
University of Delaware 1
Tufts University 1
Bioinformatics Institute, A-Star, Singapore 1
Chongqing University 1
Andhra University 1
Universite Claude Bernard Lyon 1 1
University of California, San Francisco 1
Portland State University 1
University of Siegen 1
Southern Illinois University 1
University of Strathclyde 1
Shanghai Jiaotong University 1
The University of North Carolina at Chapel Hill 1
San Diego Supercomputer Center 1
University of Genoa 1
University of Tokyo 1
Tver State University 1
Nippon Telegraph and Telephone Corporation 1
University of Freiburg 1
Yantai University 1
University of Nebraska - Lincoln 1
Ben-Gurion University of the Negev 1
Stevens Institute of Technology 1
University of Hamburg 1
J.P. Morgan Chase & Co. 1
Siemens AG 1
Monmouth University 1
Queen's University Belfast 1
Universite de Versailles Saint-Quentin-en-Yvelines 1
Temple University 1
Baruch College 1
Institute of Computing Technology Chinese Academy of Sciences 1
Umea University 1
Panasonic Technologies, Inc. 1
Penn State Erie, The Behrend College 1
McMaster University 1
University of Nevada, Las Vegas 1
Illinois State University 1
North Dakota State University 1
Pohang University of Science and Technology 1
The Graduate Center 1
Federal University of Rio de Janeiro 1
Humboldt University of Berlin 1
NASA Langley Research Center 1
Emory University 1
University of Arkansas at Little Rock 1
University of Buenos Aires 1
Florida State University 1
New Mexico State University Las Cruces 1
Victoria University of Wellington 1
University of Amsterdam 1
Polytechnic University - Brooklyn 1
University of Haifa 1
Courant Institute of Mathematical Sciences 1
IBM India Research Laboratory 1
Toyohashi University of Technology 1
Cleveland State University 1
University of Nebraska 1
University of Bergamo 1
Dongduk Women's University 1
NASA Goddard Space Flight Center 1
University of Michigan-Dearborn 1
Federal University of Rio Grande do Sul 1
La Trobe University 1
University of Missouri-Kansas City 1
University of Bonn 1
Old Dominion University 1
University of South Florida Tampa 1
Goethe University Frankfurt 1
Musashino Electrical Communication Lab 1
Technical University in Braunschweig 1
Bremen University 1
Tektronix Incorporated 1
Jet Propulsion Laboratory 1
University of Kansas 1
Silicon Graphics, Inc. 1
Linkoping University 1
Universite des Sciences et Technologies de Lille 1
University of Montreal 1
University of St. Thomas, Minnesota 1
University of Central Oklahoma 1
Washington University in St. Louis 1
Santa Clara University 1
University of Southern Maine 1
Institute of Computer Science of the Polish Academy of Sciences 1
Queensland University of Technology 1
Technical University of Darmstadt 1
Baylor University 1
Japan Advanced Institute of Science and Technology 1
Kobe University 1
BBN Technologies 1
Oakland University 1
Shibaura Institute of Technology 1
Roma Tre University 1
Brno University of Technology 1
Renmin University of China 1
Polytechnic University - Long Island Graduate Center 1
University of Louisiana at Lafayette 1
Abo Akademi University 1
University of Southern California, Information Sciences Institute 1
University of Tennessee, Knoxville 1
University of Stuttgart 1
Dalhousie University 1
University of Kentucky 1
Charles University 1
Institute of Computer Science Crete 2
Laboratoire Traitement et Communication de l'Information 2
IBM Deutschland GmbH 2
Yahoo Research Barcelona 2
Universite Grenoble Alpes 2
IBM Toronto Software Lab 2
CSIRO Data61 2
Ecole Normale Superieure 2
University of Colorado at Boulder 2
University of Munster 2
Kansas State University 2
University of Johannesburg 2
Universite Pierre et Marie Curie 2
University of Crete 2
Institute for Infocomm Research, A-Star, Singapore 2
National Technical University of Athens 2
University of Salzburg 2
University of Modena and Reggio Emilia 2
North Carolina State University 2
Ecole Normale Superieure de Cachan 2
University of Minnesota System 2
University of Houston 2
City University of New York 2
Louisiana State University 2
University of Zagreb 2
Universite Paris Dauphine 2
Sabanci University 2
Birkbeck University of London 2
University of Vermont 2
University of Manitoba 2
Fudan University 2
The University of Western Ontario 2
Kyoto University 2
Technical University of Denmark 2
State University of New York at Albany 2
University of Zurich 2
Oregon State University 2
Indian Institute of Science 2
University of Passau 2
University of Tsukuba 2
Polish Academy of Sciences 2
Sun Microsystems 2
University of Saskatchewan 2
General Electric Company 2
University of Guelph 2
RWTH Aachen University 2
University of Heidelberg 2
University of New Brunswick 2
Florida Atlantic University 2
Athens University of Economics and Business 2
Leiden University 2
Federal Judicial Center 2
University of Louisville 2
Basilicata University Potenza 2
University of Florence 2
The University of Warwick 2
University of Central Florida 2
University of Bayreuth 2
University of Iowa 2
South China University of Technology 2
University of Konstanz 2
Northeastern University 2
Ludwig Maximilian University of Munich 2
Commonwealth Scientific and Industrial Research Organization 2
Syracuse University 2
Hiroshima University 2
Boston College 2
Indian Institute of Technology, Delhi 2
Eindhoven University of Technology 2
Saarland University 2
International Computer Science Institute 2
Nagoya University 3
McGill University 3
Zhejiang University 3
IBM Tokyo Research Laboratory 3
Iowa State University 3
University of Ioannina 3
Rice University 3
Universite Paris 7- Denis Diderot 3
University of Salerno 3
Northwestern University 3
CNRS Centre National de la Recherche Scientifique 3
University of Kaiserslautern 3
Istituto Di Calcolo E Reti Ad Alte Prestazioni, Rende 3
University of Ulm 3
University of Massachusetts System 3
Indian Institute of Technology, Bombay 3
University of Brescia 3
University of Trento 3
University of Wisconsin 3
University of Wisconsin Milwaukee 3
University of Twente 3
Technical University of Clausthal 3
Catholic University of Leuven, Leuven 3
INRIA Futurs 3
Virginia Tech 3
Kent State University 3
University of Oklahoma 3
University of Roma La Sapienza 3
University of London 3
University of Massachusetts Lowell 3
Laboratoire de Recherche en Informatique 3
Hasso-Plattner-Institut fur Softwaresystemtechnik GmbH 3
IBM, Brasil 3
Max Planck Institute for Informatics 4
University of Michigan 4
George Washington University 4
Tel Aviv University 4
University of Auckland 4
Unisys Corporation 4
MIT Computer Science and Artificial Intelligence Laboratory 4
University of Mannheim 4
Brigham Young University 4
Hong Kong Polytechnic University 4
University of California , Merced 4
University of Mons-Hainaut 4
Polytechnic Institute of Turin 4
University of Turin 4
Georgia State University 4
Philipps-Universitat Marburg 4
Seoul National University 4
University of Warsaw 4
Bilkent University 4
Aristotle University of Thessaloniki 4
University of Udine 4
Technical University of Madrid 4
University of California System 4
INRIA Rocquencourt 4
TU Dortmund University 4
Microsoft Research Asia 4
Universite de Bordeaux 4
Aalto University 4
Universite Libre de Bruxelles 5
SRI International 5
Ohio State University 5
Google Inc. 5
Universidad de Chile 5
Peking University 5
Florida International University 5
Southern Methodist University 5
University of Hagen 5
Sun Yat-Sen University 5
Italian National Research Council 5
Swiss Federal Institute of Technology, Zurich 5
University of Rochester 5
University of Pisa 5
University of California, Riverside 5
University of Aarhus 5
Rutgers, The State University of New Jersey 5
Michigan State University 5
Northeastern University China 5
University at Buffalo, State University of New York 5
Microelectronics Computer Technology Corporation 6
University of Helsinki 6
University of Texas at Arlington 6
Worcester Polytechnic Institute 6
Brown University 6
Center for Mathematics and Computer Science - Amsterdam 6
MITRE Corporation 6
Beihang University 6
AT&T Inc. 6
Hong Kong Baptist University 6
University of California, Davis 6
University of Pittsburgh 6
Carleton University 6
Singapore Management University 6
Harbin Institute of Technology 6
Indiana University 6
Technical University of Crete 6
University of Sydney 6
Swiss Federal Institute of Technology, Lausanne 6
University of Athens 6
University of South Australia 6
Yahoo Research Labs 6
University of Illinois 7
Vrije Universiteit Amsterdam 7
RMIT University 7
City University of Hong Kong 7
Georgia Institute of Technology 7
Hewlett-Packard Inc. 7
Ecoles polytechniques federales 7
Universite Paris-Sud XI 7
University of Utah 7
Pontificia Universidad Catolica de Chile 7
University of Regina 7
Fujitsu Ltd. 8
AT&T Laboratories Florham Park 8
University Michigan Ann Arbor 8
Korea Advanced Institute of Science & Technology 8
Intel Corporation 8
Intel Research Laboratories 8
Yale University 9
Lawrence Berkeley National Laboratory 9
Duke University 9
HP Labs 9
University of Antwerp 9
Microsoft Corporation 9
University of Queensland 9
Nanyang Technological University 10
Free University of Bozen-Bolzano 10
University of Texas at Austin 10
INRIA Institut National de Rechereche en Informatique et en Automatique 10
Stony Brook University 10
University of California, Santa Barbara 10
Karlsruhe Institute of Technology, Campus South 10
University of Minnesota Twin Cities 10
University of Milan 10
Pennsylvania State University 11
Arizona State University 11
The University of Hong Kong 11
Simon Fraser University 11
Technical University of Munich 11
IBM Research 12
Vienna University of Technology 12
Boston University 12
IBM, USA 12
Technion - Israel Institute of Technology 12
Tsinghua University 12
Hebrew University of Jerusalem 13
The University of British Columbia 13
University of Calabria 13
Case Western Reserve University 14
George Mason University 14
University of Melbourne 14
Carnegie Mellon University 14
University of Bologna 14