Sanghani Center research takes new approach to analyze depression, anxiety from Reddit posts to provide better care, lower suicide rate

(From left) Chang-Tien Lu with his Ph.D. students Shailik Sarkar, Lulwah AlKulaib, and Abdulaziz Alhamadani. Photo by Joung Min Choi for Virginia Tech.

Suicide, the 10th leading cause of death for adults in the United States and the third leading cause of death among kids ages 10 to 14 and young adults ages 15 to 24, is often the result of an underlying mental health condition such as depression, anxiety, or bipolar disorder. 

Motivated by a suicide mortality by state map released by the Centers for Disease Control and Prevention (CDC) on the increasing severity of mental health crisis — further exacerbated by the COVID-19 pandemic — three Ph.D. students and their advisor at the Sanghani Center for Artificial Intelligence and Data Analytics are analyzing social media in a way that can help social workers and other professionals better understand and tackle different aspects of mental health issues to help prevent suicide. Read the full story here.

Fall rankings spotlight Virginia Tech’s emphasis on research

Graduate students conduct research on test beds at Virginia Tech’s campus in Arlington as part of the Commonwealth Cyber Initiative. Photo by Anthony Wright for Virginia Tech

A strong emphasis on research, a robust commitment to sustainability, and a large international presence among its faculty served as common themes in Virginia Tech’s showing in various national and global rankings this fall.

The university wrapped up the calendar year by being ranked in a tie for No. 265 out of 2,000 universities listed in U.S. News & World Report’s Best Global Universities rankings. The list featured institutions from 95 countries.

Among the university’s 2022 research-related milestones is the partnership between Virginia Tech and Amazon to advance fields of artificial intelligence and machine learning housed in the Virginia Tech College of Engineering and led by the Sanghani Center for Artificial Intelligence and Data Analytics. Read the full story here.

Congratulations to Sanghani Center’s 2022 Summer and Fall Graduates

Virginia Tech’s 2022 Fall Commencement ceremony takes place today.

“We wish our graduates at the Sanghani Center all the best as they receive their Ph.D. and master’s degrees and take the next step toward achieving their career goals,” said Naren Ramakrishnan, the Thomas L. Phillips Professor of Engineering in the Department of Computer Science at Virginia Tech and director of the Sanghani Center for Artificial Intelligence and Data Analytics

Following are the Sanghani Center’s 2022 summer and fall graduates:


Nikhil Muralidhar, advised by Naren Ramakrishnan and Anuj Karpatne, has earned a Ph.D. in computer science. His research interest is in leveraging machine learning to address problems in scientific applications leveraging data and scientific theory. He also received a graduate certificate in Urban Computing. The title of his dissertation is “Science Guided Machine Learning: Incorporating Scientific Domain Knowledge for Learning Under Data Paucity and Noisy Contexts.”  In Fall 2022, Muralidhar joined the Computer Science Department at Stevens Institute of Technology in Hoboken, New Jersey, as an assistant professor and leads the Scientific Artificial Intelligence (ScAI) Lab to develop scientific machine learning solutions incorporating data and domain knowledge in physics, fluid dynamics, cyber-physical systems and disease modeling.

Xinyue Wang, advised by Edward Fox, has earned a Ph.D. in computer science. His research focuses on web archive processing and analysis infrastructure through distributed computation. The title of his dissertation is “Large Web Archive Collection Infrastructure and Services.” Wang is joining Yahoo in San Jose, California, as a research scientist.

Master’s degree

Huiman Han, advised by Chris North, has earned a master’s degree in computer science. Her research focuses on visual analytics, interactive machine learning, and explainable artificial intelligence. The title of her thesis is “Explainable Interactive Projections for Image Data.” Huimin is joining LinkedIn in Mountain View, California, as a software engineer in Machine Learning.

Sarah Maxseiner, advised by Lynn Abbott, received a master’s degree in electrical and computer engineering. Her thesis is on assessing the quality level of hand-drawn sketches.  

Virginia Tech HokieBot competes in Alexa Prize SocialBot Grand Challenge 5 to develop advanced AI technology that enhances user conversation

(From left) Lifu Huang, assistant professor of computer science and faculty at the Sanghani Center is advising a team of Ph.D. students — Minqian Liu, Ying Shen, Zhiyang Xu, and Barry Yao — competing in the Alexa Prize SocialBot Grand Challenge 5 sponsored by Services LLC. Photo by Jingyuan Qi.

A team of four graduate students at the Sanghani Center for Artificial Intelligence and Data Analytics is one of nine international university teams selected to compete in the Alexa Prize SocialBot Grand Challenge 5 sponsored by Services LLC. Each participating team will receive up to a $250,000 research grant to build a skill that can help Alexa converse with users on popular topics and current events for at least 20 minutes while achieving a user rating of at least 4.0/5.0. Top finishing teams will also be eligible for various prizes. Read more here.

Amazon Fellows and faculty-led projects advance innovations in machine learning and artificial intelligence

Amazon Fellows are Ph.D. students (from left) Qing Guo and Yi Zeng. Photos courtesy of the fellows.

The Amazon–Virginia Tech Initiative for Efficient and Robust Machine Learning has announced support for two Amazon Fellows and four innovative research projects led by Virginia Tech faculty that further the initiative’s mission of advancing new directions in machine learning.

Funded by Amazon, housed in the College of Engineering, and directed by researchers at the Sanghani Center for Artificial Intelligence and Data Analytics on Virginia Tech’s campus in Blacksburg and at the Innovation Campus in Alexandria, the initiative was launched in March to support student and faculty-led development and implementation of innovative approaches to robust machine learning — such as ensuring that algorithms and models are resistant to errors and adversaries — that could address worldwide industry-focused problems. Read more here.

Sanghani Center Student Spotlight: Han Liu

Graphic is from the paper, “Case Study Comparison of Computational Notebook Platforms for Interactive Visual Analytics”

Having earned a bachelor of science degree in computer science at Virginia Tech in 2020, Han Liu remained at the university to continue his education and pursue a master’s degree. 

“On a personal note, I love the beautiful surroundings in Blacksburg,” said Liu. “But more importantly, my decision was influenced by the professors I have met here who are passionate about their fields and actively support students in their studies and research.” 

Liu, who is advised by Chris North, added that “as a graduate student, the Sanghani Center has provided me with many exciting academic and research opportunities.”

Liu’s research focuses on visual analytics and how to represent data in a way that helps users understand and interpret it more easily.

“Existing notebook platforms have different capabilities for supporting the use of visual analytics and it is not clear which platform to choose for implementing visual analytics notebooks,” said Liu. “My work explores how to best implement these notebooks to solve problems, particularly in data science scenarios.” 

On October 16, Liu will present a short paper, “Case Study Comparison of Computational Notebook Platforms for Interactive Visual Analytics,” at the Visualization in Data Science (VDS) Symposium associated with IEEE VIS 2022 in Oklahoma City.

He is on track to graduate this semester (FALL 2022) and his ultimate goal “is to become a data scientist who can analyze data for actionable insights and help people by solving real-world problems.”

Sanghani Center Student Spotlight: Mia Taylor

Graphic is from the paper: “Andromeda in the Classroom: Collaborative Data Analysis for 8th Grade Engineering Design”

Mia Taylor began her freshman year at Virginia Tech as a five-year accelerated bachelor of science/master of science program in computer science. She will graduate this semester (FALL 2022) and has already accepted a position of research engineer on the machine learning team at Graf Research in Blacksburg.

Her research at the Sanghani Center has focused on how students use the interactive dimensionality reduction application Andromeda. “I want to understand how students — when given complex data analysis tools — learn from the experience of conducting exploratory data analysis,” said Taylor, who is advised by Chris North.

Taylor’s collaborative full paper, “Andromeda in the Classroom: Collaborative Data Analysis for 8th Grade Engineering Design,” was published by the 2022 American Society for Engineering Education (ASEE) Annual Conference and Exposition in June.

For this study, the classroom teacher uploaded data describing projects to Andromeda with each point in the visualization representing a student’s design. With Andromeda controlled by the teacher, students used it to visualize, analyze, and compare their designs in extended conversation with each other and the teacher and collectively explore their design-related data.

““Despite not having the mathematical background to understand dimensionality reduction, the students in our study learned about relations between variables and felt that Andromeda helped them compare their designs in a friendly, but competitive manner,” Taylor said. 

In the study, she said, the team also suggested ways of improving Andromeda’s utility as a public, educational resource and provided an example of class activity aligned with Virginia’s proposed Standards of Learning in data science. 

Taylor was introduced to research in visualization while doing an undergraduate capstone project in human-computer interaction. 

“The Sanghani Center conducts interesting research within data science and machine learning,” said Taylor, “and as a master’s degree student, it has afforded me useful connections across the field which will continue to be valuable as I will be remaining in the Blacksburg area as a machine learning engineer after graduation.”

Professional summer internships provide valuable real-world experience for Sanghani Center graduate students

Huimin Han, a master’s degree student in computer science, is spending the summer in Sunnyvale, California, for an internship at LinkedIn

Graduate students at the Sanghani Center often embark on summer internships to gain real-world experience and in some instances, enable them to also advance their own research interests and projects. Summer 2022 is no exception. While some companies and research labs are continuing to operate remotely, a number of students have returned to working on-site.

Following is a list of Sanghani Center interns, where they are working, and what they are doing:

Sikiru Adewale, a Ph.D. student in computer science, is a graduate technical research intern at Intel Corporation, working remotely. He is using machine learning to analyze the workloads dataset. His advisor is Ismini Lourentzou.

Jie Bu, a Ph.D student in computer science, is a machine learning research intern for an Apple Maps Team in Cupertino, California, working on-site. He is helping to optimize user experience and map services using deep learning methods. His advisor is Anuj Karpatne.

Satvik Chekuri, a Ph.D. student in computer science, is an natural language processing intern with the Deloitte Audit and Assurance Data Science team in New York City, working remotely on the entity extraction and entity linking problem for unstructured data in the financial domain. His advisor is Edward Fox.

Nurendra Choudharya Ph.D. student in computer science, is an applied science intern at Amazon A9 in Palo Alto, California, working on-site on use case of graph and language representation in the context of e-commerce platforms. His advisor is Chandan Reddy.

Elizabeth Christmana master’s degree student in computer science, is a software engineering intern at Splunk in Blacksburg, Virginia, working remotely on automating the build process for Stream, a Splunk add-on for deep packet inspection. Her advisor is Chris North.

Arka Daw, a Ph.D. student in computer science, is a research intern at IBM T.J. Watson Research Center in New York, working on-site. He is developing physics-informed AI methods to solve inverse problems involving partial differential equations. His advisor is Anuj Karpatne.

Mohannad Elhamod, a Ph.D student in computer science, is an intern at NASA Langley Research Center in Hampton, Virginia, working remotely on applying machine learning in material engineering. His advisor is Anuj Karpatne.

Jiaying Gong, a Ph.D. student in computer science, is a research scientist intern at Rakuten in Boston, Massachusetts, working remotely on multi-label few-shot learning in natural language processing. Her advisor is Hoda Eldardiry.

Naveen Guptaa master’s degree student in computer science, is a software engineering intern at Kentik in San Francisco, California, working remotely in the web development domain and using React, Node JS, and Express JS in building SAAS products. His advisor is Anuj Karpatne. 

Huimin Han, a master’s degree student in computer science, is a machine learning engineer intern at LinkedIn in Sunnyvale, California, working on-site. She is exploring machine learning techniques to build the most accurate occupational taxonomy for every Linkedin member. Her advisor is Chris North.

Jianfeng He, a Ph.D. student in computer science, is an applied scientist intern on the AWS AI team at Amazon in Seattle, Washington, working on-site. He is doing research related to audio, text, and semantic understanding. His advisor is Chang-Tien Lu.

Meghana Hollaa master’s degree student in computer science, is a machine learning intern on the Data Technologies team at Bloomberg LP in New York, working on-site. She is researching and optimizing entity extraction methodologies on financial documents with emphasis on low inference times. Her advisor is Ismini Lourentzou.

Aneesh Jain, a master’s degree student in computer science, is a machine learning engineering intern at Cadence Solutions, working remotely on applications of language models in the healthcare domain. His advisor is Chandan Reddy.

Gaurang Karwande, a master’s degree student in the Bradley Department of Electrical and Computer Engineering, is a machine learning intern at VideaHealth, Inc., in Boston, Massachusetts, working on-site in the field of medical imaging and developing AI-powered solutions in dentistry. His advisor is Ismini Lourentzou. 

Yoonjin Kim, a Ph. D. student in computer science, is a graduate software research intern at Intel IP and Competitive Analysis in Santa Clara, California, working an on-site/virtual hybrid. She is gaining industry exposure to the latest trend in workloads and workload-related research. Her advisor is Lenwood Heath. 

M. Marufa Ph.D. student in computer science, is an applied scientist intern at in Seattle, Washington, working on-site to solve an image referencing problem with a goal of improving Amazon delivery experiences. His advisor is Anuj Karpatne.

Amarachi Blessing Mbakwea Ph.D. student in computer science, is an AI research associate at JPMorgan Chase & Co in New York City, working on-site. She is conducting research on natural language processing-related problems. Her advisor is Ismini Lourentzou.

Makanjuola Ogunleye, a Ph.D student in computer science, is a data scientist intern at Intuit, working remotely with the AI Capital team in Mountain View, California. The team is building a natural language processing and AI framework to improve the company’s risk assessment strategy and policy that will be added as a reusable service to the Intuit AI core capital group. His advisor is Ismini Lourentzou.

Medha Sawhneya master’s degree student in computer science, is a machine learning engineering intern at Twitter in San Francisco, California, working remotely with the Health ML Team. Her advisor is Anuj Karpatne. 

Avi Seth, a master’s degree student in computer science, is a data scientist intern at Gastrograph AI in New York City, working remotely on generalizing the preference prediction model for flavor profiles across different demographics. His advisor is Ismini Lourentzou. 

Afrina Tabassum, a Ph.D. student in computer science, is an intern at Los Alamos National Laboratory (LANL) in New Mexico, working remotely. She is exploring machine learning techniques under varying data quality. Her advisor is Hoda Eldardiry.

Mia Taylor, a master’s degree student in computer science, is a graduate research engineer intern at Graf Research in Blacksburg, Virginia, working on-site. She is conducting applied machine learning research in a hardware context. Her advisor is Chris North.

Muntasir Wahed, a Ph.D. student in computer science, is a research intern at IBM Research – Almaden in San Jose, California, working on-site with the Intelligence Augmentation Group on set expansion techniques to build lexicons for natural language processing tasks. His advisor is Ismini Lourentzou.

Sijia Wang, a Ph.D. student in computer science, is an applied science intern at Amazon Web Services in New York City, working on-site on information extraction, entity linking, and related natural language processing tasks. Her advisor is Lifu Huang. 

Xinyue Wang, a Ph.D. student in computer science, is a research intern on the Media Science Team at Yahoo, in San Jose, California, working on-site on a project related to trending user search queries and term refinement. His advisor is Edward Fox.

Zhiyang Xu, a Ph.D. student in computer science, is an applied scientist intern at Amazon Alexa AI in Sunnyvale, California, working on-site to detect the inconsistency of facts in dialog systems and improve the interpretability of the detecting process. His advisor is Lifu Huang.

Yi Zeng, a Ph.D. student in computer engineering, is an AI research intern at SONY Corporation of America in New York City, working remotely on developing a meta-learning-based method against general training data corruptions from a security perspective. His co-advisor is Ruoxi Jia.

Six faculty win seed funding for new projects

Photo by Peter Means for Virginia Tech.

Ed Fox, a professor of computer science and faculty member at the Sanghani Center for Artificial Intelligence and Data Analytics, is part of a research team tackling pressing questions about how global change will affect transmission of infectious disease between species, beginning with how rabies moves from vampire bats to other animals. Click here to read more.

Innovation Campus faculty, curriculum, and building continue to take shape

Virginia Tech broke ground on Academic Building One of the Innovation Campus in Alexandria in September. The campus’ first building will be 300,000 square feet and 11 stories tall when completed in 2024.

At his June 6 update to the Virginia Tech Board of Visitors, Lance Collins, vice president and executive director of the Virginia Tech Innovation Campus, emphasized the appointment of 12 computer science and computer engineering faculty members to the campus team.

Collins further detailed the “faculty lead” positions, with several of the new faculty members accepting key leadership roles at the institution. 

Naren Ramakrishnan, the Thomas L. Phillips Professor of Engineering and director of the Sanghani Center for Artificial Intelligence and Data Analytics, will serve as faculty lead for artificial intelligence and applied machine learning at the Innovation Campus. Read more here