CSUN - Complex and Sustainable Urban Networks Laboratory
Singapore MRT East West line Overground Elevated Buona Vista at Night Electric Distribution, Tranmission Lines, Power Grid, and Tree, Manila, Philippines, Developing, Emerging Country Cheonggyecheon River Promenade (former elevated highway), Seoul, South Korea Rain Garden, Green Infrastructure, Bioswale, Pilsen, Sustainable, Sustainability, Street, Chicago, Illinois Chicago Street Lights from Plane, Chicago, IL, Illinois – Mercury Vapor, Sodium Vapor, White, Yellow, Orange Glow Double-Decker Tram on Des Voeux Road, Hong Kong Detroit People Mover Shell Adversiting Confluence, Lyon, France Forge Lebailly, St-Pierre and Miquelon Marina Bay Sands Hotel in Singapore, Singapore Principe Pio Station in Madrid Vasco Da Gama Bridge in Lisbon Big Allis Power Plant in New York City, NY Nanpu Bridge in Shanghai, China Decentralizing the Power Grid, San Diego, CA LA Los Angeles river with concrete channel and a sandy sky by Warner Borthers Bros. studios in Burbank, California, CA Marina South, Marina Barrage, Gardens by the Bay, Ships in Singapore Strait, Singapore Underground Infrastructure, buildings, transport (roads), electricity (medium and low voltage), water, wasterwater (sewer), telecommunications, district heating, Saint Pierre and Miquelon, France Carbon Neutral Waste-to-Energy Power Plant, Incineration, Fernwärme, ERZ Entsorgung + Recycling Zürich, Zurich, Switzerland Annapolis Tidal Power Plant Electricity Energy Nova Scotia Power, Annapolis Royal, NS, Canada Medieval paved street with gutter in the center, Lyon, France Slum, informal settlement along the Kênh Đôi canal, Saigon, Cholon, Ho Chi Minh City, Vietnam Colonnade du Louvre et Rue de Rivoli, confinement, lockdown, rue vide, empty streets, Paris, France


complex and sustainable urban networks laboratory


Welcome to the website of the complex and sustainable urban networks (CSUN) laboratory.

We live in a fascinating world and we have some significant challenges to overcome. The mission of CSUN is to advance scientific knowledge and create software for the design of smart, sustainable, and resilient cities. This website aims to describe the activities going on within CSUN, but we also have many projects that are about to start, and we invite you to come back frequently.


Latest News

How can we capture the topics that naturally emerge from a corpus of documents? And how can we visualize the trends in how these topics evolve over time? This is what we set ourselves to do with the Literature Topic Co-occurrence and Frequency (LiTCoF) Python tool that we developed.

Using Natural Language Processing (NLP), we mined all the scientific literature that contained specific keywords related to industrial ecology and climate change. In the end, we collected more than 30,000 abstracts that you can download freely here. Then, to analyze all of this text, we developed the Literature Topic Co-occurrence and Frequency (LiTCoF) Python tool; you can download the tool freely here.

Authors themselves specify keywords, but topics also naturally emerge from an entire corpus of publications, in the form of new keywords. LiTCoF does many things and one of them is to identify and keep track of how topics evolve over time using Latent Dirichlet Allocation (LDA). To visualize the results, LiTCof plots a heatmap like the one shown below. All of our results were published in the article: Dayeen, F.R., Sharma, A.S., Derrible, S. "A text mining analysis of the climate change literature in industrial ecology". Journal of Industrial Ecology. 2020; 24: 276– 284.

Feel free to use the tool yourself as much as you want. We just ask you to cite our paper.

Picture of Heatmap of How Topics Evolve Over Time in the Scientific Literature using the LiTCoF (Literature Topic Co-occurrence and Frequency) Python Tool. Adapted from Figure 4 of 'A text mining analysis of the climate change literature in industrial ecology' published in the Journal of Industrial Ecology in 2020 by Fazle Rabbi Dayeen, Abhinav S. Sharma, and Sybil Derrible, volume 24, pages 276 - 284, URL: https://doi.org/10.1111/jiec.12998