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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Curriculum Vitae - David Xia</title>
<link rel="stylesheet" href="style.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.0/css/all.min.css">
</head>
<body>
<header>
<h1>David Xia</h1>
<h1>Curriculum Vitae</h1>
<p style="text-align: center;"><a href="docs/david_xia_cv.pdf" target="_blank">PDF Version</a></p>
</header>
<main>
<section id="interests">
<h2>Research Interests</h2>
<p>Theoretical foundations of machine learning, reinforcement learning, multi-armed bandits, optimization, high-dimensional probability</p>
</section>
<hr>
<section id="education">
<h2>Education</h2>
<ul>
<li>
<h4>University of Illinois Urbana-Champaign</h4>
<p>Bachelor of Science in Computer Science</p>
<p>Bachelor of Science in Liberal Arts & Sciences Major in Mathematics, Data Optimization Concentration</p>
<p>Bachelor of Science in Liberal Arts & Sciences Major in Statistics</p>
<p>GPA: 3.98</p>
<p>2023 - 2027</p>
</li>
</ul>
</section>
<hr>
<section id="papers">
<h2>Papers</h2>
<ul>
<li>
<div id="paper2" class="paper-title">[2025] RSK linear operators and the Vershik-Kerov-Logan-Shepp curve</div>
<div class="authors">Duy Phan, <b>David Xia</b></div>
<div class="status"><i>Submitted to <a href="https://www.combinatorics.org/" target="_blank">Electronic Journal of Combinatorics</a></i></div>
<div class="arxiv-links">
<a href="https://arxiv.org/abs/2504.05510" target="_blank">arXiv</a>
</div>
</li>
<li>
<div id="paper1" class="paper-title">[2024] EveGuard: Defeating Vibration-based Side-Channel Eavesdropping with Audio Adversarial Perturbations</div>
<div class="authors">Jung-Woo Chang, Ke Sun, <b>David Xia</b>, Xinyu Zhang, Farinaz Koushanfar</div>
<div class="status"><i><a href="https://sp2025.ieee-security.org/" target="_blank">IEEE Symposium on Security and Privacy, 2025 </a></i></div>
<div class="arxiv-links">
<a href="https://arxiv.org/abs/2411.10034" target="_blank">arXiv</a>
</div>
</li>
</ul>
</section>
<hr>
<section id="manuscripts">
<h2>Workshop Papers, Manuscripts, Notes</h2>
<ul>
<li>
<div id="paper5" class="paper-title">[2026] Algebraic Combinatorics Scribe Notes: The Cauchy Identity</div>
<div class="authors"><b>David Xia</b></div>
<div class="status"><i><a href="docs/cauchy_identity_scribe_notes.pdf" target="_blank">PDF</a></i></div>
</li>
<li>
<div id="paper4" class="paper-title">[2026] Algebraic Combinatorics Scribe Notes: Schur Polynomials</div>
<div class="authors"><b>David Xia</b>, Oren Akresh</div>
<div class="status"><i><a href="docs/schur_polynomial_scribe_notes.pdf" target="_blank">PDF</a></i></div>
</li>
<li>
<div id="paper3" class="paper-title">[2026] Revitalizing Local Democracy: A Human-Centered Audit of LLMs in City Council Journalism</div>
<div class="authors"><b>David Xia</b>, Chris Maury</div>
<div class="status"><i>To appear in <a href="https://heal-workshop.github.io/" target="_blank">Human-centered Evaluation and Auditing of Language Models (HEAL) Workshop</a> at <a href="https://chi2026.acm.org/" target="_blank">CHI 2026</a></i></div>
<!-- <div class="arxiv-links">
<a href="https://arxiv.org/abs/2504.05510" target="_blank">arXiv</a>
</div> -->
</li>
</ul>
</section>
<hr>
<section id="experience">
<h2>Research Experience</h2>
<h4><a href="https://ayong.web.illinois.edu/ICLUE.html" target="_blank">Illinois Combinatorics Lab for Undergraduate Experience (ICLUE)</a></h4>
<h5>Research Mentee, Aug 2024 - present. Advised by <a href="https://ayong.web.illinois.edu/" target="_blank">Prof. Alexander Yong</a>.</h5>
<ul>
<li>
Proved a new asymptotic result that the probability that the Schensted insertion algorithm for a uniformly random permutation in S<sub>n</sub> exhibits a special "bumping" interaction converges to 1 as n approaches infinity.
</li>
<li>
Derived the result using rigorous probability bounds on the RSK linear operator by leveraging the Vershik-Kerov-Logan-Shepp limit shape curve as the central analytic tool.
</li>
<li>
Developed proofs requiring techniques spanning real analysis (uniform convergence, limit arguments), probability theory (concentration inequalities, convergence in probability), and asymptotic analysis (bounding combinatorial quantities in the large-n regime).
</li>
<li>
Paper in submission to the <a href="https://www.combinatorics.org/" target="_blank">Electronic Journal of Combinatorics</a>.
</li>
</ul>
<h4><a href="https://xyzhang.ucsd.edu/index.html" target="_blank">University of California San Diego</a></h4>
<h5>Research Intern, Jun 2023 - Dec 2024. Advised by <a href="https://xyzhang.ucsd.edu/" target="_blank">Prof. Xinyu Zhang</a>.</h5>
<ul>
<li>
Developed EveGuard, a software-based defense framework to protect voice privacy from vibrometry-based side channels using adversarial audio by using a perturbation generator model (PGM) to effectively suppress sensor-based eavesdropping while preserving high audio quality.
</li>
<li>
Implemented Eve-GAN, a novel domain translation task for inferring eavesdropped signals, enabling end-to-end training of PGM, utilizing few-shot learning techniques to reduce data collection overhead.
</li>
<li>
Achieved a protection rate of over 97% against audio classifiers, hindering eavesdropped reconstruction.
</li>
<li>
Paper published in the <a href="https://sp2025.ieee-security.org/" target="_blank">IEEE Symposium on Security and Privacy 2025</a>.
</li>
</ul>
<h4><a href="https://iml.math.illinois.edu/" target="_blank">Illinois Mathematics Lab (formerly Illinois Geometry Lab)</a></h4>
<h5>Student Scholar, Jan 2024 - present. Advised by Prof. AJ Hildebrand.</h5>
<ul>
<li>
Researched the data science perspective of sports matches, analyzing the predictability of outcomes by comparing prediction accuracies across polls, the betting market, Elo ratings, and mathematical models like Bradley-Terry.
</li>
<li>
Presented findings at Rose-Hulman Undergraduate Math Conference 2024, UIUC Undergraduate Research Symposium 2024, and Joint Mathematics Meeting 2025.
</li>
<li>
Currently working on paper.
</li>
</ul>
<h4><a href="https://hcii.cmu.edu/" target="_blank">Carnegie Mellon University Human-Computer Interaction Institute (HCII)</a></h4>
<h5>Research Intern, May 2025 - Feb 2026. Advised by <a href="https://www.cs.cmu.edu/~jbigham/" target="_blank">Prof. Jeff Bigham</a>.</h5>
<ul>
<li>
Designed and evaluated an automated journalism pipeline using SOTA LLMs to replicate end-to-end editorial workflows, from transcript segmentation to headline generation and topic prioritization.
</li>
<li>
Orchestrated large-scale crowd-sourced study and demonstrated that LLM-based headline quality and topic prioritization can meet and exceed professional standards.
</li>
<li>
Paper to appear in <a href="https://heal-workshop.github.io/" target="_blank">Human-centered Evaluation and Auditing of Language Models (HEAL) Workshop</a> at <a href="https://chi2026.acm.org/" target="_blank">CHI 2026</a>.
</li>
</ul>
<h4><a href="https://blog.nus.edu.sg/seeder/" target="_blank">National University of Singapore SEEDER Group</a></h4>
<h5>Research Intern, May 2024 - Aug 2024. Advised by <a href="https://blog.nus.edu.sg/seeder/people/kelvinxyfong/" target="_blank">Prof. Xuanyao Fong</a>.</h5>
<ul>
<li>
Developed machine learning pipeline to detect, classify, and analyze diseases in plant leaves using U-Net segmentation and CNN classification models, achieving 90% segmented classification rate.
</li>
<li>
Stacked deep learning models with traditional ML models and augmented training data with cGAN-generated synthetic images, achieving over 95% detection accuracy.
</li>
</ul>
</section>
<hr>
<section id="presentations">
<h2>Presentations</h2>
<ul>
<li>
<h4>[2025] Carnegie Mellon University Human-Computer Interaction Institute REU Symposium </h4>
<p>
<strong>Title: </strong>LLMs for Extracting Agenda Items from City Council Meetings and Generating Newsworthy Headlines<br>
<strong>Authors: </strong>David Xia<br>
<strong>Program: </strong><a href="https://hcii.cmu.edu/summer-research-program" target="_blank">CMU HCII REU</a><br>
<strong>Presentation: </strong><a href="/presentations/cmu_hcii_poster.pdf" target="_blank">Poster</a>
</p>
</li>
<li>
<h4>[2025] Algebra, Geometry and Combinatorics Day (joint work presented by Duy Phan)</h4>
<p>
<strong>Title: </strong>RSK linear operators and the Vershik-Kerov-Logan-Shepp curve<br>
<strong>Authors: </strong>Duy Phan, David Xia<br>
<strong>Program: </strong><a href="https://sites.google.com/view/algecom-main/algecom-xxv?authuser=0" target="_blank">Algecom</a><br>
<strong>Presentation: </strong><a href="/presentations/algecom_poster.pdf" target="_blank">Poster</a>
</p>
</li>
<li>
<h4>[2025] Joint Mathematics Meeting</h4>
<p>
<strong>Title: </strong>Predictability in Major Sports Leagues: Betting Market vs Model Based Predictions<br>
<strong>Authors: </strong>David Xia <br>
<strong>Program: </strong><a href="/programs/jmm_2025_program.pdf" target="_blank">Joint Mathematics Meeting</a><br>
<strong>Presentation: </strong><a href="/presentations/jmm_2025_poster.pdf" target="_blank">Poster</a>
</p>
</li>
<li>
<h4>[2024] Illinois Mathematics Lab Research Symposium</h4>
<p>
<strong>Title: </strong>Predictability in College Sports<br>
<strong>Authors: </strong>Yihan Gao, Samuel Lam, and David Xia<br>
<strong>Presentation: </strong>Poster
</p>
</li>
<li>
<h4>[2024] Rose-Hulman Undergraduate Math Conference</h4>
<p>
<strong>Title: </strong>Predictability in College Sports: Comparing the Accuracies of Prediction Models for College Football and Basketball Games<br>
<strong>Authors: </strong>Yihan Gao, Samuel Lam, and David Xia<br>
<strong>Program: </strong><a href="/programs/rose_hulman_2024_program.pdf" target="_blank">Rose-Hulman Undergraduate Math Conference</a> <br>
<strong>Presentation: </strong><a href="/presentations/rose_hulman_2024_presentation.pdf" target="_blank">Oral Talk</a>
</p>
</li>
<li>
<h4>[2024] University of Illinois Urbana-Champaign Undergraduate Research Symposium</h4>
<p>
<strong>Title: </strong>Predictability and Competitiveness in Sports Leagues<br>
<strong>Authors: </strong>Yihan Gao, Samuel Lam, and David Xia<br>
<strong>Program: </strong><a href="/programs/urs_2024_program.pdf" target="_blank">UIUC Undergraduate Research Symposium</a><br>
<strong>Presentation: </strong><a href="/presentations/spring_2024_poster.pdf" target="_blank">Poster</a>
</p>
</li>
</ul>
</section>
<hr>
<!-- <section id="service">
<h2>Service</h2>
<ul>
<li><h4>[SP26 UIUC] Algorithms (CS 374) Course Assistant</h4></li>
</ul>
</section>
<hr> -->
<section id="awards">
<h2>Grants and Awards</h2>
<ul>
<li><h4>[2025] CMU HCII REU: NSF 2349558</h4></li>
<li><h4>[2025] ICLUE RTG: NSF 1937241</h4></li>
</ul>
</section>
<hr>
<section id="coursework">
<h2>Relevant Coursework</h2>
<ul>
<li><strong>CS:</strong> Machine Learning, NLP, Deep Learning, Algorithms, Numerical Methods, Numerical Analysis </li>
<li><strong>Math:</strong> Honors Real Analysis, Graph Theory, Combinatorics, Abstract Linear Algebra, Abstract Algebra I--II, Algebraic Combinatorics, Linear Programming</li>
<li><strong>Stats:</strong> Stochastic Processes, Applied Bayesian Analysis, Survival Analysis</li>
</ul>
</section>
<hr>
<section id="languages">
<h2>Languages</h2>
<ul>
<li><strong>English:</strong> Native</li>
<li><strong>Mandarin Chinese:</strong> Fluent, HSK6</li>
</ul>
</section>
<hr>
<section id="links">
<h2>Links</h2>
<p><a href="mailto:davidx3@illinois.edu" target="_blank">
<i class="fas fa-envelope"></i> Email
</a></p>
<p><a href="https://github.com/davidxia3" target="_blank">
<i class="fab fa-github"></i> GitHub
</a></p>
<p><a href="https://linkedin.com/in/dx3" target="_blank">
<i class="fab fa-linkedin"></i> LinkedIn
</a></p>
<p><a href="https://scholar.google.com/citations?hl=en&user=uScYa6cAAAAJ" target="_blank">
<i class="fas fa-graduation-cap"></i> Google Scholar
</a></p>
</section>
</main>
<p style="text-align: center;"><a href="docs/david_xia_cv.pdf" target="_blank">PDF Version</a></p>
<hr>
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