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Events for December 13, 2022

  • PhD Thesis Proposal - Wenzuan Zhou

    Tue, Dec 13, 2022 @ 09:00 AM - 11:00 PM

    Thomas Lord Department of Computer Science

    University Calendar

    PhD Candidate: Wenxuan Zhou

    Title: Relation Extraction: Models, Robustness, and Generalization

    Chair: Muhao Chen
    Committee members: Laurent Itti, Jonathan May, Tianshu Sun, Robin Jia

    Abstract: With large amounts of digital text generated every day, it is important to extract structured knowledge automatically from the text. Relation extraction (RE), as one essential step of the solution, aims at identifying relationships among entities in a given piece of text. In this thesis proposal, I will present my work during my Ph.D. on RE from three perspectives: (1) designing effective RE models based on pretrained language models; (2) Improving the robustness of RE models, especially against entity bias; and (3) building data-efficient RE models in low-resource scenarios, which is important for real-world applications. After these, I will introduce my ongoing work and future directions for RE.

    WebCast Link: : https://usc.zoom.us/j/6915039300

    Audiences: Everyone Is Invited

    Contact: Lizsl De Leon

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  • ECE Seminar: Improved Cardiac MRI leveraging Spiral bSSFP at 0.55T

    ECE Seminar: Improved Cardiac MRI leveraging Spiral bSSFP at 0.55T

    Tue, Dec 13, 2022 @ 11:00 AM - 12:00 PM

    Ming Hsieh Department of Electrical and Computer Engineering

    Conferences, Lectures, & Seminars

    Speaker: Dr. Ye Tian, Postdoctoral Scholar, Ming Hsieh Dept of ECE, USC

    Talk Title: Improved Cardiac MRI leveraging Spiral bSSFP at 0.55T

    Abstract: Magnetic Resonance Imaging is a non-invasive, radiation-free medical imaging modality that can provide functional and structural assessments of the cardiovascular system. MRI has trended towards higher field strength and stronger gradient performance which has benefitted high-resolution static imaging of the nervous and musculoskeletal systems. It has not had the same revolutionary impact on imaging of the cardiovascular system, which is constantly in motion, and where image quality is dominated by artifact. Recently, there has been an increasing interest in low-field (< 1.5T) MRI configurations, which are expected to benefit dynamic MRI applications. Low-field systems provide lower susceptibility, lower acoustic noise, lower specific absorption rate, and favorably scaled relaxivities (lower T1 and longer T2/T2*), which open new opportunities.

    In this talk, I will present several recent projects focused on improved cardiac MRI at 0.55T. I utilize a prototype whole-body 0.55T MRI (MAGNETOM Aera, Siemens Healthineers) at the Dynamic Imaging Science Center, and variations of spiral balanced steady-state free precession (bSSFP) pulse sequences to achieve imaging that is impossible or extremely difficult at traditional MRI field strengths. These applications include 1) contrast-optimal simultaneous multi-slice imaging of cardiac function, 2) fetal cardiac function and great vessel anatomy evaluation, and 3) dynamic T1-weighted imaging for myocardial perfusion assessment.

    Biography: Ye Tian is currently a Postdoctoral Scholar at the University of Southern California and a 0.55T MRI physicist in the Dynamic Imaging Science Center (DISC), working with Professor Krishna Nayak. He completed his Ph.D. training at the University of Utah in September 2019. His research interests include real-time imaging, first-pass myocardial perfusion, simultaneous multi-slice imaging, and novel pulse sequences for cardiovascular assessment at 0.55T.

    Host: Dr. Richard Leahy, leahy@sipi.usc.edu

    Webcast: https://usc.zoom.us/j/95106798688?pwd=YThYL1c2RTFJemNsV0cwS0pLZ0taUT09

    Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248

    WebCast Link: https://usc.zoom.us/j/95106798688?pwd=YThYL1c2RTFJemNsV0cwS0pLZ0taUT09

    Audiences: Everyone Is Invited

    Contact: Mayumi Thrasher

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