# George Chacko

George Chacko
Research Associate Professor
chackoge@illinois.edu
2130 Siebel Center for Comp Sci

## For More Information

- The ERNIE Project

## Resident Instruction

- CS 598: Computational Scientometrics

## Research Statement

My scientific interests are centered around novelty in science, impact, peer review, knowledge diffusion, and research community structure. A related interest is the social interactions that drive scientific recognition and achievement. Emphasis is placed on value to at least one of four stakeholders: (i) research funders, who want to know what their support has achieved and what it might in future, (ii) research institutions who ask the same questions as funders but are recipients of funds and must strategize to sustain their existing support and/or augment it, (iii) providers of research analytical services who think beyond the confines of commonplace global metrics such as the h-index and its well documented limitations, and (iv) the evaluation community.

I am presently working on the identification and characterization of research communities that form around scientific questions. The techniques used in my studies build upon work in scientometrics, sociology, science history, and computer science. The work I do is presently supported by a grant in 2022 from the Insper:Illinois collaboration as well as a research award from the Oracle Corporation. Our first manuscript from the collaboration with Insper, Well-Connected Communities in Real-World Networks (2023) Park et al. will be published in the proceedings of Complex Networks 2023 (a preprint is available https://arxiv.org/abs/2303.02813). A second manuscript describing a parallelized code for enforcing well-connected communities has been submitted. We have funding for a PhD student to work on this project, which has many interesting dimensions. Interested PhD students are encouraged to reach out.

Most recently, Vikram Ramavarapu, Vidya Kamath Pailodi and Hossein Mohasel Arjomandi have joined my group. Vikram developed a parallelized code to enforce connectivity in clusters. Vikram was just selected to spend a semester at the National Institute of Informatics in Tokyo under the aegis of the Japan NII Onsite Internship programs so congratulations to him. Vidya is developing a community search strategy and was announced as one of five 2024 Siebel Scholars so congratulations to her. Hossein is developing a distance-based measure for citation data. Laxmi Vijayan and Haadi Elsaawy from the iCAN program took a CS 597 course with me in summer 20203 and made great progress. Other students I have worked with are: Undergraduate. Hemank Kohli and Franklin Moy (ECE), Akhil Jakatdar, Isabella Nisperos, Trisha Manna (CS) Graduate: Elaina Wittmer, Sid Ahuja, Deep Kotadia (CS). Through collaboration with Tandy Warnow: Eleanor Wedell, Minhyuk Park, Baqiao Liu, Yasamin Tabatabaee (CS). João Alfredo Cardos Lamy from Insper made a brief visit this summer and will continue working with us with local guidance from Fabio Ayres.

CS 597 offerings: I am willing to offer CS 597 courses for current PhD or MS students at UIUC who are looking for potential thesis topics. The research I can advise on is presently focused on clustering, community detection. community search with application to the real world problems of science mapping, research evaluation, and scientometrics. A key part of the group experience is developing the ability to critically interpret the literature relevant to our interests. Students are required to develop verbal and written communications skills.

## Research Areas

- Data and Information Systems

## Selected Articles in Journals

- CM++ - A Meta-method for Well-Connected Community Detection (2023) Vikram Ramavarapu, Fábio Jose Ayres, Minhyuk Park, Vidya Kamath Pailodi, João Alfredo Cardoso Lamy, Tandy Warnow, and George Chacko (2024) Journal of Open Source Software)
- Well-Connected Communities in Real-World Networks (2023) Minhyuk Park, Yasamin Tabatabaee, Baqiao Liu, Vidya Kamath Pailodi, Vikram Ramavarapu, Rajiv Ramachandran, Dmitriy Korobskiy, Fabio Ayres, George Chacko, Tandy Warnow. (2023) arXiv 2303.02813 (Accepted for publication in Complex Networks 2023)
- Jakatdar, A., Liu, B., Warnow, T., and Chacko, G. (2022) AOC; Assembling Overlapping Communities. (In Press) Quantitative Science studies (preprint on arXiv)
- Wedell, E., Park, M., Korobskiy, D., Warnow, T., and Chacko, G. Center-Periphery Structure in Research Communities (2022) Quantitative Science Studies (preprint also on ArXiv)
- Chandrasekharan, S., Zaka, M., Gallo, S., Zhao, W., Korobskiy, D., Warnow, T., & Chacko, G. Finding Scientific Communities in Citation Graphs : Articles and Authors. (2021) Quantitative Science Studies. doi:10.1162/qss_a_00095
- Bradley, J., Devarakonda, S., Davey, A., Korobskiy, D., Liu, S., Lakhdar-Hamina, D., Warnow, T., & Chacko, G. (2020). Co-citations in context: Disciplinary heterogeneity is relevant. Quantitative Science Studies, 1, 1-13. doi:10.1162/qss a 00007
- Bornmann, L., Devarakonda, S., Tekles, A., & Chacko, G. (2020). Disruptive papers published in Scientometrics: meaningful results by using an improved variant of the disruption index originally proposed by Wu, Wang, and Evans (2019). Scientometrics. doi:10.1007/s11192-020-03406-8.
- Bornmann, L., Devarakonda, S., Tekles, A., & Chacko, G. (2020). Are disruption index indicators convergently valid? The comparison of several indicator variants with assessments by peers. Quantitative Science Studies. doi:10.1162/qss a 00068.
- Devarakonda, S., Bradley, J., Korobskiy, D., Warnow, T., & Chacko, G. (2020). Frequently co-cited publications: Features and kinetics. Quantitative Science Studies. doi: 10.1162/qss a 00075.
- Devarakonda, S., Korobskiy, D., Warnow, T., & Chacko, G. (2020). Viewing Computer Science through Citation Analysis Salton and Bergmark Redux. Scientometrics. doi:10.1007/s11192-020-03624-0.
- Zhao, W., Korobskiy, D., Chandrasekharan, S., Merz, K., & Chacko, G. (2020). Converging interests- chemoinformatics, history, and bibliometrics. Journal of Chemical Information and Modeling. doi:10.1021/acs.jcim.0c01098
- Zhao, W., Korobskiy, D., & Chacko, G. Delayed Recognition; A Co-citation Perspective (2020) Frontiers in Research Metrics and Analytics doi:10.3389/frma.2020.577131
- Keserci, S., Livingston, E., Wan, L., Pico, A.R., and Chacko, G. (2017) Heliyon doi: 10.1016/j.heliyon.2017.e00442
- Boyack, K.W., Chen, M-C, & Chacko, G. (2014) Characterization of the Peer Review Network at the Center for Scientific Review, National Institutes of Health. PLOS One doi: 10.1371/journal.pone.0104244

## Refereed Conference Papers and Presentations

- Well-Connected Communities in Real-World Networks (2023) Minhyuk Park, Yasamin Tabatabaee, Baqiao Liu, Vidya Kamath Pailodi, Vikram Ramavarapu, Rajiv Ramachandran, Dmitriy Korobskiy, Fabio Ayres, George Chacko, Tandy Warnow. (2023) Complex Networks 2023.

## Invited Lectures

- Detecting Research Communities From The Scientific Literature

## Other Scholarly Activities

- Program Committee, International Society for Scientometrics and Informetrics (ISSI) 2023

## Recent Courses Taught

- CS 598 GGC - Computational Scientometrics

## Related News

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With 23 New Faculty, Illinois CS Expands Prowess in Education, Research

## News Notes