Networks in the News

How algorithmic popularity bias hinders or promotes quality

By Giovanni Luca Ciampaglia, Azadeh Nematzadeh, Filippo Menczer & Alessandro Flammini Algorithms that favor popular items are used to help us select among many choices, from top-ranked search engine results to highly-cited scientific papers. The goal of these algorithms is to identify high-quality items such as... read more »

 

Complexity Explorables by Dirk Brockmann

Complexity Explorables is a website where people easily explore some complex systems examples while playing models with fun. For example, “I herd you!” enables you to explore how different network structures impact the spread of a disease in a population. Consequently, you can understand a phenomenon called “herd... read more »

 

Multidimensional Understanding of Tie Strength

An article “The weakness of tie strength” in the current issue of Social Networks unpacked three elements related to the strength of ties: capacity, frequency, and redundancy. The case with an email network shows that the three elements are not highly correlated and are likely to reflect different dimensions of ties.... read more »

 

Using networks to analyze soccer

Engineering professor Luís Amaral has investigated complex social and structural networks in areas ranging from healthcare and biology to gender discrimination and gun violence. His diverse research interests and innate curiosity eventually led him to study soccer — his favorite sport. https://news.northwestern.edu/stories/2018/may/using-big-data-to-analyze-soccer/  read more »

 

Social Media for Opioid Addiction Epidemiology: Automatic Detection of Opioid Addicts from Twitter and Case Studies

A recent research from West Virginia University shows how to detect opioid addicted people from large structured heterogeneous networks using transductive learning. Check out the paper: https://dl.acm.org/citation.cfm?id=3132857  read more »

 

How network theory predicts the value of Bitcoin

A recent research by Spencer Wheatley at ETH Zurich in Switzerland and a few colleagues shows that the key measure of value for cryptocurrencies is the network of people who use them. What’s more, they say, once Bitcoin is valued in this way it becomes possible to see when it is overvalued and perhaps even to spot the... read more »

 

Educational Game Website for Network Concepts

“It’s Nicky Case!” is a cool website where you can play different kinds of games related to network concepts such as complex contagion and small-world networks. Moreover, there are other games for game theory and theory of voting. Check out the website (http://ncase.me/)!  read more »

 

Computational Social Science ≠ Computer Science + Social Data

Hanna Wallach published a thought piece of what computational social science is, especially from her computer science point of view. Given computational social science in mind, She made points of differences between computer science and social science in terms of goals, models, data, and challenges:  Goals: Prediction... read more »

 

Cooperation, clustering, and assortative mixing in dynamic networks

A recent study by David Melamed and his colleagues examined whether the emergent structures that promote cooperation are driven by reputation or can emerge purely via dynamics. To answer the research question, they recruited 1,979 Amazon Mechanical Turkers and asked them to play an iterated prisoner’s dilemma game.... read more »

 

Students’ social interactions and daily routines to make predictions about freshman retention

Sudha Ram’s Smart Campus research tracks students’ social interactions and daily routines via their CatCard usage — and leverages that information to make predictions about freshman retention. The goal of Ram’s Smart Campus research is to help educational institutions repurpose the data already being... read more »