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About Highlights Nonprofit Media Research Papers Awards

About

I started my career in aerospace engineering. While a PhD candidate at Stanford, I studied artificial intelligence and developed neural network architectures for scientific simulations. During the pandemic, I ran a nonprofit to help fight covid with decentralized technology. I care about aligning technology with human rights and values.

Highlights

A demo webpage rating button to reward content creators and build an ad-free ecosystem

This is a browser extension that lets you rate any webpage and an associated search engine with confidence scores based on positive and negative valence. I used the same scoring algorithm as reddit's top score plus noise to help elevate new webpages. This is an alternative to click-based models to help combat the excessive rewarding of polarizing content. A paid version could reward content creators to help reduce reliance on ads. Demo at Upvote.vote. link

Nonprofit

I was the Executive Director of Covid Watch, a nonprofit I started in February 2020 with a mission to improve the privacy of the contact tracing apps that were being released in response to the pandemic.

We were the first team in the world to publish a white paper, develop, and open source a decentralized exposure notification protocol using Bluetooth communication in March 2020. Within apps that implement the security protocol, data is stored locally on personal devices, and it stays anonymous throughout the notification process. The system is designed to prevent corporations and governments from using the apps for the centralized collection of personally identifiable information. Our TCN Protocol received significant news coverage and was followed by the development of similar privacy-preserving protocols in early April like DP-3T, PACT, and Google/Apple GAEN.

In April 2020, our volunteers and nonprofit staff also released a free and open source mobile app for sending anonymous exposure notifications with development costs funded entirely by prizes and donations. In August 2020, we collaborated with the University of Arizona on research to improve the estimation of infection risk from anonymous Bluetooth data to better inform private quarantine recommendations.

At the end of 2020, the Covid Watch nonprofit closed, but the open source Covid Watch app continues to be implemented for universities and public health departments by WeHealth.

Media

Research

I originally worked in aerospace engineering, completing my M.S. at the University of Arizona. While at Honeywell Aerospace, I invented and patented a method for reducing the risk of transonic flutter in turbomachinery, improving the safety of next generation jet engines. After spending several years in industry, I decided to pursue a PhD at Stanford supported by a Department of Energy Computational Science Graduate Fellowship (DOE CSGF).

At Stanford, I've focused on courses in computer science and machine learning. I developed two novel methods for faster and more accurate reduced order models and I designed neural network architectures for approximating the solutions to partial differential equations by breaking them into parts. My long term research goal is to interpret and understand how to automatically draw boundaries in data in a way that is useful for prediction and explanation.

Publications, Patents, and Technical Reports

Wilson, A.M., Aviles, N., Petrie, J.I., Beamer, P.I., Szabo, Z., Xie, M., McIllece, J., Chen, Y., Son, Y.-J., Halai, S., White, T., Ernst, K.C. and Masel, J. "Quantifying SARS-CoV-2 Infection Risk Within the Google/Apple Exposure Notification Framework to Inform Quarantine Recommendations. " doi: https://doi.org/10.1111/risa.13768 , Risk Analysis. June 2021. medRxiv

Reed, H., et al. "Individual Data Rights for Exposure Notification." Data Rights Framework at exposurenotification.org. TCN Coalition White Paper, April 2020. link

Petrie, J. & White, C., et al. "Slowing the Spread of Infectious Diseases Using Crowdsourced Data." Stanford and Waterloo Independent Research Project. Covid Watch White Paper, March 2020. paper link link

White, Cristina, et al. "Fast Neural Network Predictions from Constrained Aerodynamics Datasets." AIAA Scitech Forum, 2020. American Institute of Aeronautics and Astronautics, AIAA, January 2020. arxiv link paper poster github

White, Cristina R. A neural network for breaking time dependent problems into parts. Technical report. CS379C. Department of Mechanical Engineering, Stanford University (2018) paper github

White, C., & Farhat, C. & Avery, P. A Spatial Clustering Algorithm for Constructing Local Reduced order Bases for Nonlinear Model Reduction. Presentation at the annual meeting of U.S. National Congress on Computational Mechanics, USNCCM14, Montreal, Canada. July 2017. talk poster talk paper github

White, Cristina R. A neural network architecture for reduced order modeling of PDEs. Technical report. CS221. Department of Mechanical Engineering, Stanford University (2016) paper poster github

White, Cristina R. Unsupervised Learning of Time-Dependent CFD Solutions using LSTMs. Technical report. CS231N. Department of Mechanical Engineering, Stanford University (2016) paper poster github

White, Cristina R. A reduced order modeling method for improving online computation time and accuracy using mesh coarsening. Technical report. AA290. Department of Mechanical Engineering, Stanford University (2016) paper talk github

White, Tina R. A Clustering Algorithm for Reduced Order Modeling of Shock Waves. Technical report. CS229. Department of Mechanical Engineering, Stanford University (2015) link paper github

White, Cristina. Flutter-resistant transonic turbomachinery blades and methods for reducing transonic turbomachinery blade flutter. EP 2907972A1, European Patent Office, 19 August 2015. link patent

White, Cristina. Flutter-resistant transonic turbomachinery blades and methods for reducing transonic turbomachinery blade flutter. US 20150233390A1, United States Patent and Trademark Office, 14 February 2014. link patent

Seele, Roman, et al. "Some effects of blowing, suction and trailing edge bluntness on flow separation from thick airfoils; computations & measurements." 29th AIAA Applied Aerodynamics Conference. 2011. link paper

White, Cristina. Application of Computational Fluid Dynamics on a Blunt Elliptical Airfoil. Master's Thesis. University of Arizona, 2009. thesis talk

Zakharin, Boris, et al. "The utility of hysteresis for closed-loop control applications that maintain attached flow under natural post stall conditions on airfoils." 4th Flow Control Conference. 2008. link paper

Awards

Woman of Influence. Silicon Valley Business Journal. 2020. link link

Early Response Prize for Fighting Covid-19 and Improving App Privacy. Emergent Ventures. 2020. link

Computational Science Graduate Fellowship (DOE CSGF). US Department of Energy. 2016-2020. link link link link

Research and Teaching Assistantships. Stanford University. 2015 - 2016.

National Technical Achievement Award. Honeywell Aerospace. 2015.