Congrats to SONIC PhD students Brennan Antone and Niloufar Izadinia on winning NASA HRP Grant Augmentation Awards!

Our graduate students in IEMS, Brennan Antone and Niloufar Izadinia, are selected as winners of NASA’s Human Research Program (HRP) Grant Augmentation Competition. Brennan will work on “POLARIS: Prescriptions Optimally Learned Assessing Risk in Space” (PI: Noshir Contractor) while Niloufar will work on “Measuring and Predicting Performance for Individuals, Teams and Systems in Interdependent Crew Tasks (MAPPITS-ICT)” (PI: Leslie DeChurch).


SONIC Speaker Series Presents: Moses Boudourides

Video now available:

We are delighted to invite Professor Moses Boudourides to present “The Temporal Hypergraph of The Andy Warhol’s Diaries” today, 4pm, at FSB 1-483.


In Pat Hackett’s volume “The Andy Warhol Diaries,” we were able to identify automatically 2278 names of persons (celebrities, artists etc.), who happen to be mentioned in 2024 diaries during a period of 12 years, from November 24, 1976, to February 17, 1987. This was done using the standard Natural Languages Processing technique of POS tagging for the detection of 2-grams or 3-grams corresponding to persons’ names (first-last name, possibly including a middle name or a composite surname). Thus, each diary written in a particular day corresponds to a set of persons, who co-occur in the textual contents of the diary.

From the point of view of the theory of hypergraphs, the collection of diaries generates a (simple) undirected hypergraph G=(V,E), where each element of the set X, called vertex, is a person and each element of the set E, called hyperedge, is a set of (distinct) persons. In other words, each hyperedge is interpreted as a diary at a certain date involving a set of persons who happen to co-occur in that diary (persons counted as singletons even if they can be mentioned more than once in the same diary). Apparently, under this co-occurrence relation, The Andy Warhol’s Diaries give rise to a temporal (longitudinal) hypergraph, in which every hyperedge (diary) has a distinct time stamp (date).

Equivalently, from the network-analytic view, a single diary at a certain date corresponds to a clique of persons co-occurring in this diary. Moreover, by aggregating diaries written in a certain time period, one obtains a weighted undirected graph of persons, in which two persons are adjacent as far as there exists at least one date in this period, during which these persons co-occur in the corresponding diary (the number of such dates/diaries being the adjacency weight). Furthermore, in the usual way, one can define egocentric subgraphs during a certain period of dates. Notice that now k (larger than 2) egocentric subgraphs may define a multi-layer substructure in the hypergraph of diaries in that period of dates. Here, we are going to give an account of a number of different temporal-hypergraph-analytic computations on The Andy Warhol Diaries.


Moses Boudourides Ph.D. is Visiting Professor of Mathematics at NYU Abu Dhabi ( He is also in the Faculty of Northwestern University School of Professional Studies Data Science Program ( and Affiliated Faculty at the Science of Networks in Communities (SONIC) at Northwestern University (

His research work is on social network analysis, computational social science and digital humanities. In particular, his work in digital humanities is focused on networks of literary text and data analysis of scientometric datasets with emphasis on the temporal assortativity of various attributes in co-authorship and co-publication networks (as authors’ gender, publication keywords and journals’ Open Access type).

Early in 2019, he was awarded a Robert K. Merton Visiting Research Fellowship from the Institute for Analytical Sociology (IAS) at Linköping University in Sweden.


Contractor presented at the 2019 Complex Networks conference

On December 12th, Prof. Noshir Contractor presented two research articles at the 8th International Conference on Complex Networks and their Applications, Lisbon, Portugal.


Antone, B., Gupta, A., Bell, S., DeChurch, L., & Contractor, N. (2020). Testing Influence of Network Structure on Team Performance Using STERGM-Based Controls. Complex Networks and Their Applications VIII, 1018–1030. Springer International Publishing.

Noshir Contractor named ACM Fellow for advancements in computing

Congratulations, Noshir!

The Association for Computing Machinery (ACM) has named Noshir Contractor as one of its 2019 ACM Fellows.

ACM Fellows comprise an elite group that represents less than 1% of the association’s global membership. This year’s class was selected for far-reaching accomplishments that define the digital age and greatly impact our professional and personal lives.

Read more:

Contractor gave keynote at annual V2V summit at Chicago

On November 23rd, Noshir Contractor was invited to give a keynote at annual V2V summit at downtown Chicago. Started in 2013, the summit is a broad “Entrepreneurship+” platform that connects US-based innovators and entrepreneurs with international investors, corporations, and strategic partners.

More about the summit:


Contractor, N. (November 23, 2019). Keynote address at the 2019 Annual V2V Summit, Chicago, IL.