Sagar Kumar
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diesagar.bsky.social
Sagar Kumar
@diesagar.bsky.social
360 followers 380 following 130 posts
Ph.D. Student, Network Science Institute
DJ & Co-Founder, FDEC Records
sagarkumar.net

Studying the mathematical foundations of language and communication.

Looking for Postdocs & Fac Positions starting 2026 😇
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diesagar.bsky.social
i’m blue da boo dee da boo da john cho please save us
September 15, 2025 at 4:09 AM
Reposted by Sagar Kumar
dstoltenberg.bsky.social
Second, with a large team of authors, led by @anniewald.bsky.social, we study which (personal, temporal, spatial, affordance-based) properties of incidences of extrajudicial police killings facilitate public attention on social media.
Screenshot reading: Waves of Attention to Racial Injustice on Social Media: Extrajudicial Police Killings in the United States as Focusing Events Authors: Annie Waldherr, Nicola Righetti, Ryan J. Gallager, Kira Klinger, Daniela Stoltenberg, Sagar Kumar, Dominic Ridley, and Brooke Foucault Welles Abstract: The deaths of Black victims of police brutality, such as George Floyd, Breonna Taylor, Sandra Bland, and Philando Castile, have become focusing events and symbols for the Black Lives Matter (BLM) movement, catalyzing wide-spread public attention to racial injustice. While prior studies on hashtag activism predominantly focus on single and widely known cases, less is understood about why some incidents draw massive public attention while others do not. Addressing this gap, our study investigates the factors influencing the likelihood and size of public attention on Twitter (now X) following extrajudicial police killings. We analyzed 1.5 million tweets in response to 795 police killings between January 1, 2015, and December 8, 2016, in the United States. By examining cases on all scales, from unnoticed to prominent, we provide large-scale empirical evidence on disparities in public attention to police killings and their victims. Results indicate two distinct processes in the emergence of focusing events: While victims’ attributes such as race, age, and gender increased likelihood of receiving any attention (thresholding), variables of context and social construction were related to overall wave size (focusing).
August 1, 2025 at 9:26 AM
diesagar.bsky.social
more cultural evolution, but this 2022 paper discusses frequency dependence in baby names www.nature.com/articles/s41...
Measuring frequency-dependent selection in culture - Nature Human Behaviour
Newberry and Plotkin show that the frequency of a cultural trait can influence its tendency to be copied. They develop a method to measure frequency-dependent selection and describe how it relates to ...
www.nature.com
July 10, 2025 at 1:04 AM