<div dir="ltr">Happening in 5 mins.<div><br></div><div>Ming-Feng</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jun 6, 2022 at 11:19 AM Ming-Feng Ho <<a href="mailto:mingfeng.ho@email.ucr.edu">mingfeng.ho@email.ucr.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div>Hi all,</div><div><br></div><div><b>The original speaker couldn't make it for today.</b> Alternatively, I will give a short talk on my research to finish this quarter's PASS seminar series.</div><div><br></div><div>After the talk, we will have a short organizing meeting to discuss how to improve future PASS. We will also discuss how to carry out the summer PASS session.</div><div><br></div><div><div style="text-align:center"><b>Title: Bayesian models for finding DLAs and measuring quasar redshifts using Gaussian processes</b></div><div style="text-align:center"><br></div><div style="text-align:center">Ming-Feng Ho (University of California, Riverside)</div><div style="text-align:center"><br></div><div style="text-align:center"><b>Abstract:</b> Part I: We present a machine learning model for automating the detection of damped Lyman alpha absorbers (DLAs) in quasar spectra. Our model is based on Gaussian processes with a tailored covariance function learned from data. We train our model on SDSS DR9 and validate it on SDSS DR12 with ~96% accuracy. The same model is re-trained on SDSS DR12 and provides a DLA catalog for SDSS DR16 with posterior samples for each spectrum.</div><div style="text-align:center"><br></div><div style="text-align:center">Part II: We demonstrate a probabilistic framework for finding DLAs with unknown quasar redshifts. Our redshift model is an extension of our previous DLA model with known quasar redshifts. We show that the extended model can simultaneously marginalize DLA detection and quasar estimation with a small decrease in accuracy. The extended model can also be used as a quasar redshift estimator.</div></div><div style="text-align:center"><br></div><div><div style="text-align:center">Monday, June 6, 2022 at 4 pm</div><div style="text-align:center">Physics 3027 (Nebula Room)</div></div><div><br></div><div><div><font color="#000000">To submit abstracts for Summer Quarter: [<a href="https://jibancat.github.io/ucr-student-seminars/registration/index.html" target="_blank">Abstract Submission</a>].</font></div></div><div><br></div><div>Best,</div><div>Ming-Feng</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jun 3, 2022 at 4:30 PM Ming-Feng Ho <<a href="mailto:mingfeng.ho@email.ucr.edu" target="_blank">mingfeng.ho@email.ucr.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Hi all,</div><div><br></div><div>We are going to have our final PASS seminar talk this quarter. We are very happy to have our first condensed matter theory talk in PASS, given by Pak Kau Lim (from Michael Mulligan's group). He will be reviewing the renormalization group approach in condensed matter theory.</div><div><br></div><div style="text-align:center"><b>Title: Review on the Renormalization Group Approach</b></div><div style="text-align:center"><br></div><div style="text-align:center">Pak Kau Lim (University of California, Riverside)<br></div><div style="text-align:center"><br></div><div style="text-align:center"><b>Abstract:</b> Before shifting my focus to my works, I'd like to review a series of background materials until mid-summer. These are broader topics that are either related to my research or materials that I found interesting but have yet to encounter. In my upcoming PASS talk on Monday, I will discuss the renormalization group approach in lower dimension condensed matter theories.</div><div style="text-align:center"><br></div><div style="text-align:center">Monday, June 6, 2022 at 4 pm<br>Physics 3027 (Nebula Room)<br></div><div style="text-align:center"><br></div><div><div><div><font color="#000000">Details of the PASS program, please find here [<a href="https://jibancat.github.io/ucr-student-seminars/program/index.html" target="_blank">Program</a>].<br></font></div><div><font color="#000000"><br></font></div><div><font color="#000000">We have three presenters (Mahdi Qezlou, Reza Monadi, and Elizabeth Finney) queued in the Summer Quarter. We will send another email in the first week of the summer to determine the date/time for the summer PASS series since people's availability might change.</font></div><div><font color="#000000"><br></font></div><div><font color="#000000">To submit abstracts for Summer Quarter: [<a href="https://jibancat.github.io/ucr-student-seminars/registration/index.html" target="_blank">Abstract Submission</a>].</font></div><div><font color="#000000"><br></font></div><div><font color="#000000">Hope to see you there!</font></div><font color="#888888"><font color="#000000">Ming-Feng Ho</font></font></div><br></div></div>
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