Cristina Maier

My main research focuses on data mining and machine learning for graphs and hypergraphsg, big data stores and analytics technologies, recommendation systems, fairness in AI/ML, educational data mining and optimization problems.

Fall 2022 Teaching

CS430 and CS630. Class webpage here

Research Publications

Bipartite graphs and Recommendation Systems. Journal of Advances in Information Technology. JAIT 2022
Challenges to Applaying Performance Factor Analysis to Existing Learning Systems. Proceedings of the 29th International Conference on Computers in Education. Asia- Pacific Society for Computers in Education
On Biclique Connectivity of Bipartite Graphs and Recommendation Systems. ICISDM 2021
Saturated Betweenness Centrality of Sets of Vertices in Graphs. Journal of Advances in Information Technology. JAIT 2021
Laplacian Centrality of Sets of Vertices of Graphs. MLDM 2020
Betweenness Centrality of Sets of Vertices in Graphs: which Vertices to Associate. ICISDM 2020. https://doi.org/10.1145/3404663.3404679
PARINDA: an interactive physical designer for PostgreSQL. EDBT 2010: 701-704. https://doi.org/10.1145/1739041.1739131
Caching all plans with just one optimizer call. ICDE Workshops 2010: 105-110. doi: 10.1109/ICDEW.2010.5452737.

Patents

Methods, apparatus, and computer program product for data quality analysis (granted 2020)
Methods, apparatuses and computer program products for performing index search optimization (granted 2017)

Industrial Experience

Data Science
Big Data and Analytics Technologies
Educational Data Mining
Distributed Data Platforms; Text Indexing; Index Query Execution; Geospatial Search
RESTful Web Services
Cloud Computing

Technologies

Programming/Technologies/Tools: Java, Python, R, Hadoop, Spark, SparkSQL, Spark GraphX, MLflow, Kafka
Database/Stores: Redshift, PostgreSQL, MySQL, Oracle, Spectrum, Neo4j
AWS Technologies: EMR, EC2, SageMaker, Lambda, Kinesis, S3, Redshift, DynamoDB, QuickSight
NLP Libs: Gensim, BERT
Machine Learning Libs: scikit-learn, scipy, pytorch, keras, tenserflow
Operating Systems Linux/Unix, Mac OS
Visualization Tools/Libs Gephi, Tableau, Looker, AWS QuickSight, Matplotlib

Contact: cmaier@cs.umb.edu