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<!DOCTYPE HTML>
<html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Pat Callaghan</title>
<meta name="author" content="Pat Callaghan">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" type="text/css" href="stylesheet.css">
<link rel="icon" type="image/png" href="/images/icon.png">
</head>
<body>
<table style="width:100%;max-width:800px;border:0px;border-spacing:0px;border-collapse:separate;margin-right:auto;margin-left:auto;"><tbody>
<tr style="padding:0px">
<td style="padding:0px">
<table style="width:100%;border:0px;border-spacing:0px;border-collapse:separate;margin-right:auto;margin-left:auto;"><tbody>
<tr style="padding:0px">
<td style="padding:2.5%;width:63%;vertical-align:middle">
<p style="text-align:center">
<name>Pat Callaghan</name>
</p>
<p>
Hi! I’m Pat, and I’m a PhD student in the
<a href="https://www.ri.cmu.edu/ri-people/patrick-callaghan/">Robotics Institute</a>
at Carnegie Mellon University where I have the good fortune of being co-advised
by Professors <a href="https://www.hennyadmoni.com">Henny Admoni</a> and
<a href="https://www.cs.cmu.edu/~reids/">Reid Simmons</a>.
</p>
<p>
Prior to becoming a PhD student, I was a Master's student in the RI. During
that time, I was co-advised by Professors Henny Admoni and
<a href="https://www.ri.cmu.edu/ri-faculty/oliver-kroemer/">Oliver Kroemer</a>.
</p>
<p>
Before enrolling at CMU, I worked on the navigation and planning software for
<a href="https://labs.ri.cmu.edu/moonranger/">MoonRanger</a> under Professors
Red Whittaker and David Wettergreen, and I also worked on the
<a href="https://irislunarrover.space/">Iris</a> (originally
<a href="https://tinyurl.com/28kdyznf">CubeRover</a>) project's Systems
Engineering team. Before robotics, I taught 9th grade Humanities and coached
boys' lacrosse and ice hockey at Culver Academies. I earned a dual degree in
English and Economics from the University of Virginia.
</p>
<p style="text-align:center">
<a href="https://mailhide.io/e/4Z0YZLMU">Email</a>  / 
<a href="data/Callaghan_CV.pdf">CV</a>  / 
<a href="https://scholar.google.com/citations?user=hBp7u9UAAAAJ&hl=en">Google Scholar</a>
<!-- <a href="data/Callaghan_bio.txt">Bio</a>  /  -->
<!-- <a href="https://github.com/jonbarron/">Github</a> -->
</p>
</td>
<td style="padding:2.5%;width:40%;max-width:40%">
<a href="images/ri_headshot.jpg"><img style="width:100%;max-width:100%" alt="profile photo" src="images/ri_headshot.jpg" class="hoverZoomLink"></a>
</td>
</tr>
</tbody></table>
<table style="width:100%;border:0px;border-spacing:0px;border-collapse:separate;margin-right:auto;margin-left:auto;"><tbody>
<tr>
<td style="padding:20px;width:100%;vertical-align:middle">
<h2>Research</h2>
<p>
These days, I'm especially interested in figuring out how robot learners can help
make people more
<a href="https://www.merriam-webster.com/dictionary/efficacious">efficacious</a>
teachers of skills and personal preferences. In particular, I am working on ways to:
<ol>
<li>model misunderstandings that learners and teachers have of each other, and</li>
<li>incorporate such models into the robot's reasoning and feedback generation
processes.
</li>
</ol>
Ideally, my work will reduce the cognitive demands currently placed upon human
teachers without sacrificing the interpretability of the robot's internal
models.
</p>
</td>
</tr>
</tbody></table>
<table style="width:100%;border:0px;border-spacing:0px;border-collapse:separate;margin-right:auto;margin-left:auto;"><tbody>
<tr onmouseout="ff_stop()" onmouseover="ff_start()">
<td style="padding:20px;width:25%;vertical-align:middle">
<div class="one">
<div class="two" id='ff_image'>
<img src='images/msr.png' width="160"></div>
<img src='images/msr.png' width="160">
</div>
<script type="text/javascript">
function ff_start() {
document.getElementById('ff_image').style.opacity = "1";
}
function ff_stop() {
document.getElementById('ff_image').style.opacity = "0";
}
ff_stop()
</script>
</td>
<td style="padding:20px;width:75%;vertical-align:bottom">
<papertitle>Exploring Diverse Interaction Types for Human-in-the-Loop
Robot Learning.</papertitle>
<br>
Patrick Callaghan.
<br>
<em>Carnegie Mellon University</em>, 2023
<br>
<a href="https://tinyurl.com/3j522jwr">Document</a>
<p></p>
<p>
My <strong>Master's of Science in Robotics (MSR)</strong> work
investigated different interaction types and reward functions
for representing human preferences.
</p>
</td>
</tr>
<tr onmouseout="ff_stop()" onmouseover="ff_start()">
<td style="padding:20px;width:25%;vertical-align:middle">
<div class="one">
<div class="two" id='ff_image'>
<img src='images/inquire.png' width="160"></div>
<img src='images/inquire.png' width="160">
</div>
<script type="text/javascript">
function ff_start() {
document.getElementById('ff_image').style.opacity = "1";
}
function ff_stop() {
document.getElementById('ff_image').style.opacity = "0";
}
ff_stop()
</script>
</td>
<td style="padding:20px;width:75%;vertical-align:baseline">
<papertitle>INQUIRE: INteractive Querying for User-aware Informative
REasoning.</papertitle>
<br>
<a href="https://www.tescafitzgerald.com/">Tesca Fitzgerald</a>,
<a href="https://scholar.google.com/citations?user=naFAwxsAAAAJ&hl=en">
Pallavi Koppol</a>,
<strong>Patrick Callaghan</strong>,
<a href="http://www.russellwongtech.com/">Russell Q. Wong</a>,
<a href="http://www.cs.cmu.edu/~reids/">Reid Simmons</a>,
<a href="https://www.ri.cmu.edu/ri-faculty/oliver-kroemer/">Oliver Kroemer</a>,
<a href="https://www.hennyadmoni.com">Henny Admoni</a>.
<br>
<em>Conference on Robot Learning</em>, 2022
<br>
<a href="https://github.com/HARPLab/inquire">Github</a>  / 
<a href="https://openreview.net/forum?id=3CQ3Vt0v99">Paper</a>
<p></p>
<p>
We studied how an interactive agent might actively select from multiple
forms of human-provided feedback to learn a human's preferences.
</p>
</td>
</tr>
<tr onmouseout="ff_stop()" onmouseover="ff_start()">
<td style="padding:20px;width:25%;vertical-align:middle">
<div class="one">
<div class="two" id='ff_image'>
<img src='images/sinkhole.png' width="160"></div>
<img src='images/sinkhole.png' width="160">
</div>
<script type="text/javascript">
function ff_start() {
document.getElementById('ff_image').style.opacity = "1";
}
function ff_stop() {
document.getElementById('ff_image').style.opacity = "0";
}
ff_stop()
</script>
</td>
<td style="padding:20px;width:75%;vertical-align:middle">
<papertitle>Image and Lidar Dataset of the West Desert Sinkhole: An Analog for
Steep-walled Planetary Pits.</papertitle>
<br>
<a href="https://scholar.google.com/citations?user=kSkzg5IAAAAJ&hl=en">Jordan Ford</a>,
<strong>Patrick Callaghan</strong>,
<a href="https://ulandwong.com/">Uland Wong</a>,
<a href="https://www.ri.cmu.edu/ri-people/heather-jones/">Heather Jones</a>,
<a href="https://www.ri.cmu.edu/ri-people/warren-whittaker/">Chuck Whittaker</a>,
<a href="https://www.ri.cmu.edu/ri-faculty/william-red-l-whittaker/">William "Red" Whittaker</a>.
<br>
<em>International Planetary Caves Conference</em>, 2020
<br>
<a href="https://www.hou.usra.edu/meetings/3rdcaves2020/pdf/1062.pdf">Paper</a>
<p></p>
<p>
We went to the desert and collected data to model the moon's massive pits (which might one
day serve as outposts for astronauts).
</p>
</td>
</tr>
</tbody></table>
<table style="width:100%;border:0px;border-spacing:0px;border-collapse:separate;margin-right:auto;margin-left:auto;"><tbody>
<tr>
<td style="padding:0px">
<br>
<p style="text-align:right;font-size:small;">
Thanks to Jon Barron for making his website's
<a href="https://github.com/jonbarron/jonbarron_website">source code</a>
available to the rest of us!
<br>
</p>
</td>
</tr>
</tbody></table>
</td>
</tr>
</table>
</body>
</html>