Sen Pei
@senpei.bsky.social
Asst Prof @ColumbiaMSPH. A mix of Infectious Diseases, Environmental Health, Network Science & Complex Systems. Views are my own.
Website: https://senpei-cu.github.io/
Website: https://senpei-cu.github.io/
Our group is presenting at the MIDAS Network Annual Meeting! I will present on reconstructing the early spatial spread of pandemics in the US. Dr. Qing Yao will discuss the use of GNN to predict adaptive mobility for improving epidemic forecasts. Welcome to join us! @midas-network.bsky.social
November 4, 2025 at 12:54 PM
Our group is presenting at the MIDAS Network Annual Meeting! I will present on reconstructing the early spatial spread of pandemics in the US. Dr. Qing Yao will discuss the use of GNN to predict adaptive mobility for improving epidemic forecasts. Welcome to join us! @midas-network.bsky.social
Oof, this is a tough one...
October 27, 2025 at 1:40 PM
Oof, this is a tough one...
Fall is coming. Enjoy a warm and colorful afternoon in the woods. 🍁
October 7, 2025 at 7:47 PM
Fall is coming. Enjoy a warm and colorful afternoon in the woods. 🍁
🚨 JOB ALERT! Our group is recruiting a postdoc to develop novel methodologies for early outbreak detection and inference using AI/ML, modeling, and data science. This is a multi-year position providing stable research support. Welcome to apply and share with others!
👉 apply.interfolio.com/173722
👉 apply.interfolio.com/173722
September 12, 2025 at 2:35 PM
🚨 JOB ALERT! Our group is recruiting a postdoc to develop novel methodologies for early outbreak detection and inference using AI/ML, modeling, and data science. This is a multi-year position providing stable research support. Welcome to apply and share with others!
👉 apply.interfolio.com/173722
👉 apply.interfolio.com/173722
So proud to support Nidhi Ram’s presentation in the Science Research Fellows program! Nidhi is a freshman and an SFR fellow, a prestigious four-year designation for some of Columbia’s most promising science students. Truly impressed by the intellect, maturity and academic ability of all fellows.
July 30, 2025 at 4:13 PM
So proud to support Nidhi Ram’s presentation in the Science Research Fellows program! Nidhi is a freshman and an SFR fellow, a prestigious four-year designation for some of Columbia’s most promising science students. Truly impressed by the intellect, maturity and academic ability of all fellows.
Within the Helene-affected regions, coastal counties showed stronger evacuation than inland counties, which suffered the most devastating damages and losses. There is an urgent need to increase awareness and develop evacuation plans in places that are unprepared for impending climate threats. 4/
July 22, 2025 at 3:28 PM
Within the Helene-affected regions, coastal counties showed stronger evacuation than inland counties, which suffered the most devastating damages and losses. There is an urgent need to increase awareness and develop evacuation plans in places that are unprepared for impending climate threats. 4/
Milton primarily impacted coastal areas and prompted sharp increases in out-region travel prior to landfall and sustained elevated mobility in the post-disaster period. In contrast, Helene affected mostly inland areas, where mobility changes were modest and largely within natural variation. 3/
July 22, 2025 at 3:28 PM
Milton primarily impacted coastal areas and prompted sharp increases in out-region travel prior to landfall and sustained elevated mobility in the post-disaster period. In contrast, Helene affected mostly inland areas, where mobility changes were modest and largely within natural variation. 3/
First day at SMB 2025 @smbmathbiology.bsky.social in the beautiful city of Edmonton! Today, we have a minisymposium "Scenario Modeling to Inform Public Policymaking" (10:20 am and 4 pm) with excellent talks on bridging mathematical models and policymaking. Welcome to stop by and join the discussion!
July 14, 2025 at 2:01 PM
First day at SMB 2025 @smbmathbiology.bsky.social in the beautiful city of Edmonton! Today, we have a minisymposium "Scenario Modeling to Inform Public Policymaking" (10:20 am and 4 pm) with excellent talks on bridging mathematical models and policymaking. Welcome to stop by and join the discussion!
We developed a model incorporating place-specific mobility, indoor crowdedness & dwell time, and seasonality of virus transmissibility. This model explained the heterogeneous transmission of SARS-CoV-2 across NYC neighborhoods in 2020.
April 30, 2025 at 3:50 PM
We developed a model incorporating place-specific mobility, indoor crowdedness & dwell time, and seasonality of virus transmissibility. This model explained the heterogeneous transmission of SARS-CoV-2 across NYC neighborhoods in 2020.
Using aggregated mobile foot-traffic data, we measured the daily connectivity across 42 NYC neighborhoods in different activities. We also quantified contact patterns using indoor crowdedness and dwell time for each place category.
April 30, 2025 at 3:50 PM
Using aggregated mobile foot-traffic data, we measured the daily connectivity across 42 NYC neighborhoods in different activities. We also quantified contact patterns using indoor crowdedness and dwell time for each place category.
Sharing our new study out in PLoS Comput Biol.
We developed a behavior-driven epidemic model to generate neighborhood-level COVID-19 forecasts across NYC. We used mobile foot traffic data to measure how and where people mix and forecast local spread.
Read here: doi.org/10.1371/jour...
We developed a behavior-driven epidemic model to generate neighborhood-level COVID-19 forecasts across NYC. We used mobile foot traffic data to measure how and where people mix and forecast local spread.
Read here: doi.org/10.1371/jour...
April 30, 2025 at 3:50 PM
Sharing our new study out in PLoS Comput Biol.
We developed a behavior-driven epidemic model to generate neighborhood-level COVID-19 forecasts across NYC. We used mobile foot traffic data to measure how and where people mix and forecast local spread.
Read here: doi.org/10.1371/jour...
We developed a behavior-driven epidemic model to generate neighborhood-level COVID-19 forecasts across NYC. We used mobile foot traffic data to measure how and where people mix and forecast local spread.
Read here: doi.org/10.1371/jour...
So glad to have @jgyou.bsky.social give an intriguing lecture on contagion modeling and network inference in our network science class!
April 17, 2025 at 8:40 PM
So glad to have @jgyou.bsky.social give an intriguing lecture on contagion modeling and network inference in our network science class!
It was great to have @danielmalinsky.bsky.social give an excellent lecture on casual graph discovery in my network science class today!
April 3, 2025 at 8:23 PM
It was great to have @danielmalinsky.bsky.social give an excellent lecture on casual graph discovery in my network science class today!
Welcome to join Columbia Mailman seminar series on infectious disease modeling featuring Prof. Joshua Warren from Yale on 2/11 at 1 pm EST! Open to the public over Zoom.
For more information and registration: events.columbia.edu/cal/event/ev...
For more information and registration: events.columbia.edu/cal/event/ev...
February 4, 2025 at 2:25 PM
Welcome to join Columbia Mailman seminar series on infectious disease modeling featuring Prof. Joshua Warren from Yale on 2/11 at 1 pm EST! Open to the public over Zoom.
For more information and registration: events.columbia.edu/cal/event/ev...
For more information and registration: events.columbia.edu/cal/event/ev...
We will kick off the Columbia Mailman seminar series on infectious disease modeling in the spring semester with a fantastic talk by Prof. Marc Lipsitch from @harvardchanschool.bsky.social ! Welcome to join in person or over Zoom on 1/21.
Register here: events.columbia.edu/cal/event/ev...
Register here: events.columbia.edu/cal/event/ev...
January 14, 2025 at 5:40 PM
We will kick off the Columbia Mailman seminar series on infectious disease modeling in the spring semester with a fantastic talk by Prof. Marc Lipsitch from @harvardchanschool.bsky.social ! Welcome to join in person or over Zoom on 1/21.
Register here: events.columbia.edu/cal/event/ev...
Register here: events.columbia.edu/cal/event/ev...
So glad to be back in Pittsburgh for a few days! We went to places we lived and where we used to take our baby. Feel taking a time machine going back in time. Surreal!
December 14, 2024 at 2:06 AM
So glad to be back in Pittsburgh for a few days! We went to places we lived and where we used to take our baby. Feel taking a time machine going back in time. Surreal!
Hey, students at Columbia Mailman, I am teaching Introduction to Network Science in Spring 2025. Welcome to join us and have fun playing with networks! This year we will have three fantastic lectures talking about gene regulation networks, causal inference, and high-order networks.
December 12, 2024 at 5:43 PM
Hey, students at Columbia Mailman, I am teaching Introduction to Network Science in Spring 2025. Welcome to join us and have fun playing with networks! This year we will have three fantastic lectures talking about gene regulation networks, causal inference, and high-order networks.
Welcome to ColumbiaMSPH Seminar Series on Infectious Disease Modeling featuring @gmknght.bsky.social from LSHTM on Dec 10 (zoom open to the public). Register to join! For more details and registration: events.columbia.edu/cal/event/ev...
Future events: www.publichealth.columbia.edu/about-us/eve...
Future events: www.publichealth.columbia.edu/about-us/eve...
December 4, 2024 at 3:48 PM
Welcome to ColumbiaMSPH Seminar Series on Infectious Disease Modeling featuring @gmknght.bsky.social from LSHTM on Dec 10 (zoom open to the public). Register to join! For more details and registration: events.columbia.edu/cal/event/ev...
Future events: www.publichealth.columbia.edu/about-us/eve...
Future events: www.publichealth.columbia.edu/about-us/eve...
Welcome to the Columbia Mailman Seminar Series on Infectious Disease Modeling featuring @anaisabelbento.bsky.social on Dec 3 (hybrid and open to the public). Register to join over Zoom! For registration: events.columbia.edu/cal/event/ev...
Future events: publichealth.columbia.edu/about-us/eve...
Future events: publichealth.columbia.edu/about-us/eve...
November 27, 2024 at 2:51 PM
Welcome to the Columbia Mailman Seminar Series on Infectious Disease Modeling featuring @anaisabelbento.bsky.social on Dec 3 (hybrid and open to the public). Register to join over Zoom! For registration: events.columbia.edu/cal/event/ev...
Future events: publichealth.columbia.edu/about-us/eve...
Future events: publichealth.columbia.edu/about-us/eve...
Welcome to ColumbiaMSPH Dean's Seminar Series on Infectious Disease Modeling featuring @nidiatrovao.bsky.social on Nov 26 (hybrid and open to the public). Register to join over Zoom! For registration: events.columbia.edu/cal/event/ev...
Future events: publichealth.columbia.edu/about-us/eve...
Future events: publichealth.columbia.edu/about-us/eve...
November 19, 2024 at 2:45 PM
Welcome to ColumbiaMSPH Dean's Seminar Series on Infectious Disease Modeling featuring @nidiatrovao.bsky.social on Nov 26 (hybrid and open to the public). Register to join over Zoom! For registration: events.columbia.edu/cal/event/ev...
Future events: publichealth.columbia.edu/about-us/eve...
Future events: publichealth.columbia.edu/about-us/eve...
Congrats to Han Yong Wunrow for passing oral exam for his PhD at Columbia APAM. 🎉🎉🎉 Han Yong is doing exciting research on data assimilation, machine learning and infectious disease dynamics. Looking forward to his works down the road!
October 26, 2024 at 1:43 AM
Congrats to Han Yong Wunrow for passing oral exam for his PhD at Columbia APAM. 🎉🎉🎉 Han Yong is doing exciting research on data assimilation, machine learning and infectious disease dynamics. Looking forward to his works down the road!
Welcome to join Mailman Dean's Seminar Series on Infectious Disease Modeling featuring Dr. Ana Bento on Oct 22 (hybrid and open to the public). Register to join over Zoom!
For details and registration: events.columbia.edu/cal/event/ev...
Future events: publichealth.columbia.edu/about-us/eve...
For details and registration: events.columbia.edu/cal/event/ev...
Future events: publichealth.columbia.edu/about-us/eve...
October 14, 2024 at 4:22 PM
Welcome to join Mailman Dean's Seminar Series on Infectious Disease Modeling featuring Dr. Ana Bento on Oct 22 (hybrid and open to the public). Register to join over Zoom!
For details and registration: events.columbia.edu/cal/event/ev...
Future events: publichealth.columbia.edu/about-us/eve...
For details and registration: events.columbia.edu/cal/event/ev...
Future events: publichealth.columbia.edu/about-us/eve...
Bluesky now has over 10 million users, and I was #1,341,431!
September 18, 2024 at 8:29 PM
Bluesky now has over 10 million users, and I was #1,341,431!
A walk along the Hudson River on Saturday 😎
September 15, 2024 at 12:39 AM
A walk along the Hudson River on Saturday 😎
Sharing our study on the predictability of human mobility in the US during the COVID-19 pandemic, led by Michal Hajlasz, a CS undergraduate at Columbia. We used Google Community Mobility Reports data and permutation entropy to quantify mobility predictability. 👇
academic.oup.com/pnasnexus/ad...
academic.oup.com/pnasnexus/ad...
August 7, 2024 at 2:58 PM
Sharing our study on the predictability of human mobility in the US during the COVID-19 pandemic, led by Michal Hajlasz, a CS undergraduate at Columbia. We used Google Community Mobility Reports data and permutation entropy to quantify mobility predictability. 👇
academic.oup.com/pnasnexus/ad...
academic.oup.com/pnasnexus/ad...