Chang Ge

Email: cge AT umn.edu
Office: 4-213 Keller Hall, 200 Union Street SE, Minneapolis, MN 55455

I am an assistant professor in the Department of Computer Science and Engineering at the University of Minnesota, since September 2022. My main research focuses on the area of data systems, with special interest in enabling data analysis on private, dirty and federated data.

Open positions: I have multiple openings for self-motivated students. If you are interested in working with me, please read this.

Industry Experience

Apple, WFH
Research Intern in Proactive Intelligence, 01/2022 – 05/2022
Megagon Labs, Mountain View, CA
Research Intern, 05/2019 – 08/2019
Microsoft Research, Redmond, WA
Research Intern in the Database Group, 05/2018 – 08/2018
IBM Toronto Lab, Markham, ON
Software Engineer in the DB2 Performance team, 06/2014 – 06/2016
SAP, Waterloo, ON
Research Intern in HANA, 06/2013 – 03/2014

Academic Experience

University of Minnesota - Twin Cities, Minneapolis, MN
Department of Computer Science and Engineering
Assistant Professor, 09/2022 – present
Ryerson University, Toronto, ON
Sessional Lecturer, 09/2014 – 06/2016
The founding instructor for the certificate course CKCS 110: Data Access and Management.
Class photos: Fall'14, Winter'15, Spring'15, Fall'15, Winter'16, Spring'16.
University of Waterloo, Waterloo, ON
Research Assistant in the Data Systems Group, 09/2012 – 04/2014 | 09/2016 – 06/2022

Publications

Private Data Cleaning

Kamino: Constraint-Aware Differentially Private Data Synthesis
Chang Ge, Shubhankar Mohapatra, Xi He, Ihab F. Ilyas
VLDB 2021
Talk, Paper, Code
Secure Multi-Party Functional Dependency Discovery
Chang Ge, Ihab F. Ilyas, Florian Kerschbaum
VLDB 2020
Talk, Paper, Code
APEx: Accuracy-Aware Differentially Private Data Exploration
Chang Ge, Xi He, Ihab F. Ilyas, Ashwin Machanavajjhala
SIGMOD 2019
Talk, Paper, Code

Data Systems

Ruler: Data Programming by Demonstration for Document Labeling
Sara Evensen, Chang Ge, Cagatay Demiralp
EMNLP (Findings) 2020
Speculative Distributed CSV Data Parsing for Big Data Analytics
Chang Ge, Yinan Li, Eric Eilebrecht, Badrish Chandramouli, Donald Kossmann
SIGMOD 2019
Talk
Towards a Hybrid Design for Fast Query Processing in DB2-BLU Using Graphical Processing Units
Sina Meraji, Berni Schiefer, Lan Pham, Lee Chu, Peter Kokosielis, Adam Storm, Wayne Young, Chang Ge, Geoffrey Ng, Kajan Kanagaratnam
SIGMOD 2016
Indexing Bi-temporal Windows
Chang Ge, Martin Kaufmann, Lukasz Golab, Peter M. Fischer, Anil K. Goel
SSDBM 2015
Bi-temporal Timeline Index: A Data Structure for Processing Queries on Bi-temporal Data
Martin Kaufmann, Peter M. Fischer, Norman May, Chang Ge, Anil K. Goel, Donald Kossmann
ICDE 2015

Patents

Timeline Index for Partitioned Temporal Database Tables
Anil Goel, Norman May, Martin Kaufmann, Chang Ge, Andreas Luethi, Puspanantha Shanmuganathan, Donald Kossmann, Elias Yousefi Amin Abadi
US-2016-0042039-A1
Bi-temporal Timeline Index
Martin Kaufmann, Anil Goel, Chang Ge, Donald Kossmann
US-2015-0169697-A1

Awards and Honors

Queen Elizabeth II Graduate Scholarships in Science & Technology, 2019 – 2020, 2021 – 2022
Ontario Graduate Scholarship, Government of Ontario, 2017 – 2018, 2020 – 2021
President’s Graduate Scholarship, University of Waterloo, 2017 – 2022
Cybersecurity and Privacy Excellence Graduate Scholarship, 2019 – 2020
Cheriton Scholarship, University of Waterloo, 2016 – 2020

Services

PC Member: ICDE'22, ICDE'23 (Associate Chair)
Invited Reviewer: ICDE'21, VLDBJ'21, IEEE IoT-J'21, ACM TOPS'21, TODS'22
Waterloo DSG Lab Committee Member. 2019 – 2022
Organizer: Data Systems Group Weekly Lunch Talk. 2017 – 2018

Miscellanies

Half-Marathon Runner: Toronto'14,15,16, Shantou'17, San Francisco'18, Toronto'19,20,21
I developed the Samaritan.