NICO is hosting a lightning talk seminar each term as a part of our Wednesdays@NICO seminar series. Northwestern graduate students and postdoctoral fellows are invited to participate. To sign up for future lightning talks, please visit: https://bit.ly/2lRqSXK

Webinar:

Zoom link: https://northwestern.zoom.us/j/98719696231
Passcode: nico

Speakers:

Ifeoma Ozodiegwu - Postdoctoral Fellow, Feinberg School of Medicine
Chilochibi Chiziba - Research Assistant, Feinberg School of Medicine
Manuela Runge - Postdoctoral Fellow, Feinberg School of Medicine
David Sabin-Miller - Ph.D. candidate, McCormick School of Engineering
Yanxuan Shao - Ph.D. student, Weinberg College of Arts and Sciences

○ Ifeoma Ozodiegwu - Postdoctoral Fellow, Feinberg School of Medicine, Northwestern University
○ Chilochibi Chiziba - Research Assistant, Feinberg School of Medicine, Northwestern University

Title: Urban-rural differentials in the determinants of malaria transmission in Nigeria

Abstract: Nigeria accounted for roughly a quarter of global malaria cases and deaths in 2018. However, malaria transmission is heterogeneous at lower spatial scales, and understanding the drivers of transmission can inform decisions on where interventions should be prioritized. We aimed to identify factors associated with high levels of malaria transmission within urban and rural areas. We merged and analyzed cluster-level data collected in Nigeria in 2010, 2015, and 2018 by the Demographic Health Survey (DHS) program. Our analysis highlight similarities and differences in the determinants of transmission in urban and rural areas. Our findings provides supporting evidence for the positive impact of increased access to ACTs and suggest the need for greater intervention distribution in highly populated rural areas.

Bios: Ifeoma Ozodiegwu is a Postdoctoral Fellow with Dr. Jaline Gerardin Lab’s in the Department of Preventive Medicine. She received her Doctor of Public Health (DrPH) in Epidemiology from East Tennessee University (ETSU) in May 2019, where she was a Rotary International Global Grant recipient. At the Dr. Gerardin Lab, she leads dynamical modeling for understanding the impact of malaria intervention mixes in Nigeria, and supports analytical projects that evaluate spatial variation in malaria transmission within endemic countries.

Chilochibi Chiziba is a Research Assistant with Dr. Jaline Gerardin Lab in the Department of Preventive Medicine. He is currently in his final year pursuing a Master of Public Health at the University of Zambia and holds a Bachelor of Arts Economics with Demography from the same institution. His experience includes Data Analytics, Research, Monitoring, and Evaluation while working for Atlas Corps, Jhpiego, and Akros Research on studies and projects focused on Renewable Energy, HIV/AIDS, and Health Systems. He is currently working with Dr. Ozodiegwu to explore variations in malaria transmission intensity, and interventions between urban and rural areas in Nigeria.


○ Manuela Runge - Postdoctoral Fellow, Feinberg School of Medicine, Northwestern University

Title: Modelling COVID-19 transmission and health burden in Illinois

Abstract: COVID-19 continues to spread across many states in the US and reached 664,620 cases and 11,552 deaths in Illinois. Until a vaccine is available, social distancing, lockdowns, contact tracing, and mask wearing and testing are the only measures to contain the epidemic and to prevent exceeding hospital capacities and limit the public health burden. Epidemiological models are widely used for simulating the likely effect of available measures and forecasts to inform decision-makers and hospital capacity planning.

A stochastic compartmental transmission model was calibrated for the eleven COVID-19 regions in Illinois, to simulate number of cases and hospital bed demand. The model was calibrated using hospital census and deaths report data between March and November 2020. The model was used to simulate the effects of reducing delay in testing, increased testing, contact tracing, lockdown, and social distancing alone or in combination. Outcome measures included the number of cases, deaths, or probability of exceeding hospital bed capacities. During course of the epidemic, the modelling outputs provided valuable predictions to support the local health department and provided insights into local transmission and disease dynamics.

Bio: Manuela Runge is a postdoctoral researcher at Northwestern University. Her research focuses on simulating malaria interventions to inform malaria control strategies at the country level and the development and application of a COVID-19 transmission model to support the local health department.

○ David Sabin-Miller - Ph.D. candidate in the Department of Engineering Sciences & Applied Mathematics, McCormick School of Engineering, Northwestern University

Title: When pull turns to shove: modeling how tribalism and environmental bias form ideological distributions in large populations

Abstract: Accurate modeling of political opinion dynamics can help us understand polarization, and the conditions which cause it. We put forward a framework for modeling the ideological drift of individuals influenced by a heterogeneous but systematically biased environment. We show that a local-attraction/distal-repulsion dynamic, distorted by tribalist "in-group-out-group" bias, can explain both the current US ideological distribution and behavior under perturbation as seen in a recent experiment. This talk will be a short summary of work published this October in Physical Review Research.

Bio: David is a fourth-year Ph.D. candidate working with Prof. Daniel Abrams in ESAM. His current research interests are in modeling and stochastic numerical methods.

○ Yanxuan Shao - Ph.D. student in the Department of Physics and Astronomy, Weinberg College of Arts and Sciences, Northwestern University

Title: Spontaneous oscillations in microfluidic networks

Abstract: Microfluidic systems are broadly applicable to chemical analysis, flow cytometry, point-of-care diagnosis, chemical synthesis, etc. However, the precise manipulation of fluid motion usually requires external hardware, such as micropumps and microvalves. In our research, we have examined a simple microfluid network design that exhibits nonlinear flow dynamics without the need of external control components. In particular, the system exhibits the spontaneous emergence of flow-rate oscillations for fixed inlet and outlet pressures, which we demonstrate using both simulations of the Navier-Stokes equations and an analytical model that captures essential aspects of the dynamics. Our results may help improve the portability and performance of microfluidic chips.

Bio: Yanxuan is a PhD student in the Department of Physics and Astronomy at Northwestern University. She works in Prof. Adilson Motter's group.

About the Speaker Series:

Wednesdays@NICO is a vibrant weekly seminar series focusing broadly on the topics of complex systems and data science. It brings together attendees ranging from graduate students to senior faculty who span all of the schools across Northwestern, from applied math to sociology to biology and every discipline in-between.

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