47 Result(s)

Chapter and Conference Paper

On Bounding-Schemas for LDAP Directories

As our world gets more networked, ever increasing amounts of information are being stored in LDAP directories. While LDAP directories have considerable flexibility in the modeling and retrieval of information ...

Sihem Amer-Yahia, H. V. Jagadish… in Advances in Database Technology — EDBT 2000 (2000)

Chapter and Conference Paper

Tree Pattern Relaxation

Tree patterns are fundamental to querying tree-structured data like XML. Because of the heterogeneity of XML data, it is often more appropriate to permit approximate query matching and return ranked answers, i...

Sihem Amer-Yahia, SungRan Cho… in Advances in Database Technology — EDBT 2002 (2002)

Chapter and Conference Paper

Teaching Relational Optimizers About XML Processing

Due to their numerous benefits, relational systems play a major role in storing XML documents. XML also benefits relational systems by providing a means to publish legacy relational data. Consequently, a large...

Sihem Amer-Yahia, Yannis Kotidis, Divesh Srivastava in Database and XML Technologies (2004)

Chapter and Conference Paper

Expressiveness and Performance of Full-Text Search Languages

We study the expressiveness and performance of full-text search languages. Our motivation is to provide a formal basis for comparing full-text search languages and to develop a model for full-text search that ...

Chavdar Botev, Sihem Amer-Yahia… in Advances in Database Technology - EDBT 2006 (2006)

Chapter

Optimizing Tree Pattern Queries over Secure XML Databases

The rapid emergence of XML as a standard for data representation and exchange over the Web has sparked considerable interest in models and efficient mechanisms for controlled access, especially using queries, ...

Hui Wang, Divesh Srivastava… in Secure Data Management in Decentralized Sy… (2007)

Article

Space efficiency in group recommendation

Imagine a system that gives you satisfying recommendations when you want to rent a movie with friends or find a restaurant to celebrate a colleague’s farewell: at the core of such a system is what we call group r...

Senjuti Basu Roy, Sihem Amer-Yahia, Ashish Chawla, Gautam Das, Cong Yu in The VLDB Journal (2010)

Chapter and Conference Paper

Exploiting Diversification in Gossip-Based Recommendation

In the context of Web 2.0, the users become massive producers of diverse data that can be stored in a large variety of systems. The fact that the users’ data spaces are distributed in many different systems ma...

Maximilien Servajean, Esther Pacitti… in Data Management in Cloud, Grid and P2P Sys… (2014)

Article

An expressive framework and efficient algorithms for the analysis of collaborative tagging

The rise of Web 2.0 is signaled by sites such as Flickr, del.icio.us, and YouTube, and social tagging is essential to their success. A typical tagging action involves three components, user, item (e.g., photos in...

Mahashweta Das, Saravanan Thirumuruganathan, Sihem Amer-Yahia… in The VLDB Journal (2014)

Chapter

Increasing Coverage in Distributed Search and Recommendation with Profile Diversity

With the advent of Web 2.0 users are producing bigger and bigger amounts of diverse data, which are stored in a large variety of systems. Since the users’ data spaces are scattered among those independent syst...

Maximilien Servajean, Esther Pacitti… in Transactions on Large-Scale Data- and Know… (2015)

Article

PGLCM: efficient parallel mining of closed frequent gradual itemsets

Numerical data (e.g., DNA micro-array data, sensor data) pose a challenging problem to existing frequent pattern mining methods which hardly handle them. In this framework, gradual patterns have been recently ...

Trong Dinh Thac Do, Alexandre Termier, Anne Laurent… in Knowledge and Information Systems (2015)

Article

Task assignment optimization in knowledge-intensive crowdsourcing

We present SmartCrowd, a framework for optimizing task assignment in knowledge-intensive crowdsourcing (KI-C). SmartCrowd distinguishes itself by formulating, for the first time, the problem of worker-to-task ass...

Senjuti Basu Roy, Ioanna Lykourentzou, Saravanan Thirumuruganathan… in The VLDB Journal (2015)

Living Reference Work Entry In depth

Human Factors Modeling in Crowdsourcing

Sihem Amer-Yahia, Senjuti Basu Roy, Gautam Das… in Encyclopedia of Database Systems

Chapter and Conference Paper

TopPI: An Efficient Algorithm for Item-Centric Mining

We introduce TopPI, a new semantics and algorithm designed to mine long-tailed datasets. For each item, and regardless of its frequency, TopPI finds the k most frequent closed itemsets that item belongs to. For e...

Martin Kirchgessner, Vincent Leroy… in Big Data Analytics and Knowledge Discovery (2016)

Living Reference Work Entry In depth

Text Analytics in Social Media

Sihem Amer-Yahia, Sofiane Abbar, Noha Ibrahim in Encyclopedia of Database Systems

Living Reference Work Entry In depth

Structure Analytics in Social Media

Sihem Amer-Yahia, Mahashweta Das, Gautam Das… in Encyclopedia of Database Systems

Living Reference Work Entry In depth

Temporal Analytics in Social Media

Sihem Amer-Yahia, Themis Palpanas, Mikalai Tsytsarau… in Encyclopedia of Database Systems

Living Reference Work Entry In depth

Interactive Analytics in Social Media

Sihem Amer-Yahia, Alexandre Termier… in Encyclopedia of Database Systems