Leonidas Fegaras

According to our database, Leonidas Fegaras authored at least 73 papers between 1989 and 2023.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2023

A Bayesian method for the automatic extraction of meaningful clinical sequences from large clinical databases.

Aashara Shrestha, Dimitrios Zikos, Leonidas Fegaras, John Blebea, Robert A. Sasso

Comput. Methods Programs Biomed., May, 2023

2022

Translation of Array-based Loop Programs to Optimized SQL-based Distributed Programs.

Md Hasanuzzaman Noor, Leonidas Fegaras, Tanvir Ahmed Khan, Tanzima Sultana

Open J. Big Data, 2022

Scalable Tensors for Big Data Analytics.

Leonidas Fegaras, Tanvir Ahmed Khan, Md Hasanuzzaman Noor, Tanzima Sultana

Proceedings of the IEEE International Conference on Big Data, 2022

2021

A Cross-Sectional Study to Predict Mortality for Medicare Patients Based on the Combined Use of HCUP Tools.

Dimitrios Zikos, Aashara Shrestha, Leonidas Fegaras

J. Heal. Informatics Res., 2021

An annotated association mining approach for extracting and visualizing interesting clinical events.

Aashara Shrestha, Dimitrios Zikos, Leonidas Fegaras

Int. J. Medical Informatics, 2021

Scalable Linear Algebra Programming for Big Data Analysis.

Leonidas Fegaras

Proceedings of the 24th International Conference on Extending Database Technology, 2021

Translation of Array-Based Graph Programs to Spark SQL on Block Arrays.

Md Hasanuzzaman Noor, Leonidas Fegaras

Proceedings of the 2021 IEEE International Conference on Big Data (Big Data), 2021

2020

Translation of Array-Based Loops to Distributed Data-Parallel Programs.

Leonidas Fegaras, Md Hasanuzzaman Noor

Proc. VLDB Endow., 2020

Reducing race-based bias and increasing recidivism prediction accuracy by using past criminal history details.

Bhanu Jain, Manfred Huber, Ramez A. Elmasri, Leonidas Fegaras

Proceedings of the PETRA '20: The 13th PErvasive Technologies Related to Assistive Environments Conference, Corfu, Greece, June 30, 2020

Translation of Array-Based Loops to Spark SQL.

Md Hasanuzzaman Noor, Leonidas Fegaras

Proceedings of the 2020 IEEE International Conference on Big Data (IEEE BigData 2020), 2020

2019

Compile-Time Query Optimization for Big Data Analytics.

Leonidas Fegaras

Open J. Big Data, 2019

Singular race models: addressing bias and accuracy in predicting prisoner recidivism.

Bhanu Jain, Manfred Huber, Leonidas Fegaras, Ramez A. Elmasri

Proceedings of the 12th ACM International Conference on PErvasive Technologies Related to Assistive Environments, 2019

2018

A Query Processing Framework for Large-Scale Scientific Data Analysis.

Leonidas Fegaras

Trans. Large Scale Data Knowl. Centered Syst., 2018

Temporal Modification of Apriori to find Seasonal Variations between Symptoms and Diagnoses.

Aashara Shrestha, Leonidas Fegaras, Dimitrios Zikos

Proceedings of the 11th PErvasive Technologies Related to Assistive Environments Conference, 2018

Compile-Time Code Generation for Embedded Data-Intensive Query Languages.

Leonidas Fegaras, Md Hasanuzzaman Noor

Proceedings of the 2018 IEEE International Congress on Big Data, 2018

2017

An algebra for distributed Big Data analytics.

Leonidas Fegaras

J. Funct. Program., 2017

2016

Incremental Query Processing on Big Data Streams.

Leonidas Fegaras

IEEE Trans. Knowl. Data Eng., 2016

Incremental Stream Processing of Nested-Relational Queries.

Leonidas Fegaras

Proceedings of the Database and Expert Systems Applications, 2016

A Query Processing Framework for Array-Based Computations.

Leonidas Fegaras

Proceedings of the Database and Expert Systems Applications, 2016

Adapting K-means clustering to identify spatial patterns in storms.

Upa Gupta, Kulsawasd Jitkajornwanich, Ramez Elmasri, Leonidas Fegaras

Proceedings of the 2016 IEEE International Conference on Big Data (IEEE BigData 2016), 2016

Distributed Incremental Graph Analysis.

Upa Gupta, Leonidas Fegaras

Proceedings of the 2016 IEEE International Congress on Big Data, San Francisco, CA, USA, June 27, 2016

2013

Complete storm identification algorithms from big raw rainfall data using MapReduce framework.

Kulsawasd Jitkajornwanich, Upa Gupta, Sakthi Kumaran Shanmuganathan, Ramez Elmasri, Leonidas Fegaras, John McEnery

Proceedings of the 2013 IEEE International Conference on Big Data (IEEE BigData 2013), 2013

Map-based graph analysis on MapReduce.

Upa Gupta, Leonidas Fegaras

Proceedings of the 2013 IEEE International Conference on Big Data (IEEE BigData 2013), 2013

2012

Supporting Bulk Synchronous Parallelism in Map-Reduce Queries.

Leonidas Fegaras

Proceedings of the 2012 SC Companion: High Performance Computing, 2012

An optimization framework for map-reduce queries.

Leonidas Fegaras, Chengkai Li, Upa Gupta

Proceedings of the 15th International Conference on Extending Database Technology, 2012

2011

A scalable and self-adapting notification framework for healthcare information systems.

Anthony Okorodudu, Leonidas Fegaras, David Levine

Univers. Access Inf. Soc., 2011

XML Query Optimization in Map-Reduce.

Leonidas Fegaras, Chengkai Li, Upa Gupta, Jijo Philip

Proceedings of the 14th International Workshop on the Web and Databases 2011, 2011

New ideas track: testing mapreduce-style programs.

Christoph Csallner, Leonidas Fegaras, Chengkai Li

Proceedings of the SIGSOFT/FSE'11 19th ACM SIGSOFT Symposium on the Foundations of Software Engineering (FSE-19) and ESEC'11: 13th European Software Engineering Conference (ESEC-13), 2011

Multi-person identification and localization using RFID and passive sensor technology.

Shahina Ferdous, Eric Becker, Leonidas Fegaras, Fillia Makedon

Proceedings of the PETRA 2011, 2011

An Adaptable Framework for Integrating and Querying Sensor Data.

Shahina Ferdous, Sarantos Kapidakis, Leonidas Fegaras, Fillia Makedon

Proceedings of the Artificial Intelligence Applications and Innovations, 2011

Incremental Maintenance of Materialized XML Views.

Leonidas Fegaras

Proceedings of the Database and Expert Systems Applications, 2011

2010

A Schema-Based Translation of XQuery Updates.

Leonidas Fegaras

Proceedings of the Database and XML Technologies, 2010

Applying data warehousing technique in pervasive assistive environment.

Shahina Ferdous, Leonidas Fegaras, Fillia Makedon

Proceedings of the 3rd International Conference on Pervasive Technologies Related to Assistive Environments, 2010

Propagating updates through XML views using lineage tracing.

Leonidas Fegaras

Proceedings of the 26th International Conference on Data Engineering, 2010

A Scalable and Self-adapting Notification Framework.

Anthony Okorodudu, Leonidas Fegaras, David Levine

Proceedings of the Database and Expert Systems Applications, 21th International Conference, 2010

A Load Shedding Framework for XML Stream Joins.

Ranjan K. Dash, Leonidas Fegaras

Proceedings of the Database and Expert Systems Applications, 21st International Conference, 2010

2009

Synopsis based load shedding in XML streams.

Ranjan K. Dash, Leonidas Fegaras

Proceedings of the 2009 EDBT/ICDT Workshops, Saint-Petersburg, Russia, March 22, 2009, 2009

2008

Answering XPath queries with search predicates in structured P2P networks.

Weimin He, Leonidas Fegaras

Comput. Syst. Sci. Eng., 2008

Distinct value estimation on peer-to-peer networks.

Zubin Joseph, Gautam Das, Leonidas Fegaras

Proceedings of the 1st ACM International Conference on Pervasive Technologies Related to Assistive Environments, 2008

Efficient Processing of XML Update Streams.

Leonidas Fegaras

Proceedings of the 24th International Conference on Data Engineering, 2008

Approximate XML Query Answers in DHT-Based P2P Networks.

Weimin He, Leonidas Fegaras

Proceedings of the Database Systems for Advanced Applications, 2008

2007

Locating and Ranking XML Documents Based on Content and Structure Synopses.

Weimin He, Leonidas Fegaras, David Levine

Proceedings of the Database and Expert Systems Applications, 18th International Conference, 2007

Indexing and Searching XML Documents Based on Content and Structure Synopses.

Weimin He, Leonidas Fegaras, David Levine

Proceedings of the Data Management. Data, 2007

2006

A Fully Pipelined XQuery Processor.

Leonidas Fegaras, Ranjan K. Dash, Yinghui Wang

Proceedings of the 3rd International Workshop on XQuery Implementation, 2006

XML Query Routing in Structured P2P Systems.

Leonidas Fegaras, Weimin He, Gautam Das, David Levine

Proceedings of the Databases, 2006

2005

XFrag: A Query Processing Framework for Fragmented XML Data.

Sujoe Bose, Leonidas Fegaras

Proceedings of the Eight International Workshop on the Web & Databases (WebDB 2005), 2005

2004

XQuery Processing with Relevance Ranking.

Leonidas Fegaras

Proceedings of the Database and XML Technologies, 2004

The Joy of SAX.

Leonidas Fegaras

Proceedings of the First International Workshop on XQuery Implementation, 2004

Data Stream Management for Historical XML Data.

Sujoe Bose, Leonidas Fegaras

Proceedings of the ACM SIGMOD International Conference on Management of Data, 2004

2003

Exploiting Punctuation Semantics in Continuous Data Streams.

Peter A. Tucker, David Maier, Tim Sheard, Leonidas Fegaras

IEEE Trans. Knowl. Data Eng., 2003

Database Research at UT Arlington.

Sharma Chakravarthy, Y. Alp Aslandogan, Ramez Elmasri, Leonidas Fegaras, Jung-Hwan Oh

SIGMOD Rec., 2003

A Query Algebra for Fragmented XML Stream Data.

Sujoe Bose, Leonidas Fegaras, David Levine, Vamsi Chaluvadi

Proceedings of the Database Programming Languages, 9th International Workshop, 2003

2002

Query processing of streamed XML data.

Leonidas Fegaras, David Levine, Sujoe Bose, Vamsi Chaluvadi

Proceedings of the 2002 ACM CIKM International Conference on Information and Knowledge Management, 2002

2001

Query Engines for Web-Accessible XML Data.

Leonidas Fegaras, Ramez Elmasri

Proceedings of the VLDB 2001, 2001

2000

Optimizing object queries using an effective calculus.

Leonidas Fegaras, David Maier

ACM Trans. Database Syst., 2000

lambda-DB: An ODMG-Based Object-Oriented DBMS.

Leonidas Fegaras, Chandrasekhar Srinivasan, Arvind Rajendran, David Maier

Proceedings of the 2000 ACM SIGMOD International Conference on Management of Data, 2000

1999

Optimizing Queries with Object Updates.

Leonidas Fegaras

J. Intell. Inf. Syst., 1999

VOODOO: A Visual Object-Oriented Database Language for ODMG OQL.

Leonidas Fegaras

Proceedings of the Object-Oriented Technology, ECOOP'99 Workshop Reader, 1999

1998

A Temporal Object Query Language.

Leonidas Fegaras, Ramez Elmasri

Proceedings of the 5th Workshop on Temporal Representation and Reasoning, 1998

Query Unnesting in Object-Oriented Databases.

Leonidas Fegaras

Proceedings of the SIGMOD 1998, 1998

A New Heuristic for Optimizing Large Queries.

Leonidas Fegaras

Proceedings of the Database and Expert Systems Applications, 9th International Conference, 1998

1997

Optimizing Large OODB Queries.

Leonidas Fegaras

Proceedings of the Deductive and Object-Oriented Databases, 5th International Conference, 1997

1996

Revisiting Catamorphisms over Datatypes with Embedded Functions (or, Programs from Outer Space).

Leonidas Fegaras, Tim Sheard

Proceedings of the Conference Record of POPL'96: The 23rd ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages, 1996

1995

Towards an Effective Calculus for Object Query Languages.

Leonidas Fegaras, David Maier

Proceedings of the 1995 ACM SIGMOD International Conference on Management of Data, 1995

An Algebraic Framework for Physical OODB Design.

Leonidas Fegaras, David Maier

Proceedings of the Database Programming Languages (DBPL-5), 1995

1994

Improving Programs Which Recurse over Multiple Inductive Structures.

Leonidas Fegaras, Tim Sheard, Tong Zhou

Proceedings of the PEPM'94, 1994

1993

A Fold for All Seasons.

Tim Sheard, Leonidas Fegaras

Proceedings of the conference on Functional programming languages and computer architecture, 1993

Specifying Rule-Based Query Optimizers in a Reflective Framework.

Leonidas Fegaras, David Maier, Tim Sheard

Proceedings of the Deductive and Object-Oriented Databases, Third International Conference, 1993

Efficient Optimization of Iterative Queries.

Leonidas Fegaras

Proceedings of the Database Programming Languages (DBPL-4), Proceedings of the Fourth International Workshop on Database Programming Languages - Object Models and Languages, Manhattan, New York City, USA, 30 August, 1993

1992

Uniform Traversal Combinators: Definition, Use and Properties.

Leonidas Fegaras, Tim Sheard, David W. Stemple

Proceedings of the Automated Deduction, 1992

1991

Using Type Transformation in Database Implementation.

Leonidas Fegaras, David W. Stemple

Proceedings of the Database Programming Languages: Bulk Types and Persistent Data. 3rd International Workshop, 1991

1990

Exceeding the Limits of Polymorphism in Database Programming Languages.

David W. Stemple, Leonidas Fegaras, Tim Sheard, Adolfo Socorro

Proceedings of the Advances in Database Technology, 1990

1989

The ADABTPL Type System.

Leonidas Fegaras, Tim Sheard, David W. Stemple

Proceedings of the Second International Workshop on Database Programming Languages, 1989