BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//jEvents 2.0 for Joomla//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:STANDARD
DTSTART:20251102T010000
RDATE:20260308T030000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:America/New_York EST
END:STANDARD
BEGIN:STANDARD
DTSTART:20261101T010000
RDATE:20270314T030000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:America/New_York EST
END:STANDARD
BEGIN:STANDARD
DTSTART:20271107T010000
RDATE:20280312T030000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:America/New_York EST
END:STANDARD
BEGIN:STANDARD
DTSTART:20281105T010000
RDATE:20290311T030000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:America/New_York EST
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:20250714T104500
RDATE:20251102T010000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:America/New_York EDT
END:DAYLIGHT
BEGIN:DAYLIGHT
DTSTART:20260308T030000
RDATE:20261101T010000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:America/New_York EDT
END:DAYLIGHT
BEGIN:DAYLIGHT
DTSTART:20270314T030000
RDATE:20271107T010000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:America/New_York EDT
END:DAYLIGHT
BEGIN:DAYLIGHT
DTSTART:20280312T030000
RDATE:20281105T010000
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:America/New_York EDT
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:d69cf3b8e0cdf0bd140904a414d80890
CATEGORIES:Mathematical Physics Seminar
CREATED:20260706T013423
SUMMARY:Webinar: Larry Abbott - Biological Systems for Spatial Orientation
LOCATION:Zoom
DESCRIPTION:Larry Abbott  - Columbia University\nWednesday, July 15, 2026\nZoom opens: 
 10:30AM EDT\nSeminar begins: 10:45AM EDT\nBiological Systems for Spatial Or
 ientation\nI will discuss several topics related to how animals represent a
 nd update their sense of orientation in the world.  In flies, this is done 
 with a set of neurons that collectively form a ring-attractor network.  Act
 ivity in this system indicates the azimuthal orientation of the fly.  I wil
 l discuss how the polarization pattern of the sky is used as keep this enco
 ded angle aligned with the physical world.  Vertebrates have an analogous s
 ystem for head orientation, but it is more complex.  I will discuss various
  ways that a ring-attractor could be embedded in a large population of neur
 ons, with results relevant for studies of the synaptic connections in these
  circuits.  Finally, in both flies and vertebrates, these systems have been
  studied primarily in two dimension (that is, considering only yaw rotation
 s).  I will discuss different ideas about how they might respond to three-d
 imensional rotations.\n
X-ALT-DESC;FMTTYPE=text/html:<p style="text-align: center;"><strong>Larry Abbott</strong> <strong>&nbsp;
 - Columbia University</strong></p><p style="text-align: center;"><strong>We
 dnesday,&nbsp;July 15,&nbsp;2026</strong></p><p style="text-align: center;"
 ><strong>Zoom opens: 10:30AM EDT</strong></p><p style="text-align: center;"
 ><strong>Seminar begins: 10:45AM EDT</strong></p><p style="text-align: cent
 er;"><strong>Biological Systems for Spatial Orientation</strong></p><p>I wi
 ll discuss several topics related to how animals represent and update their
  sense of orientation in the world. &nbsp;In flies, this is done with a set
  of neurons that collectively form a ring-attractor network. &nbsp;Activity
  in this system indicates the azimuthal orientation of the fly. &nbsp;I wil
 l discuss how the polarization pattern of the sky is used as keep this enco
 ded angle aligned with the physical world. &nbsp;Vertebrates have an analog
 ous system for head orientation, but it is more complex. &nbsp;I will discu
 ss various ways that a ring-attractor could be embedded in a large populati
 on of neurons, with results relevant for studies of the synaptic connection
 s in these circuits. &nbsp;Finally, in both flies and vertebrates, these sy
 stems have been studied primarily in two dimension (that is, considering on
 ly yaw rotations). &nbsp;I will discuss different ideas about how they migh
 t respond to three-dimensional rotations.</p>
DTSTAMP:20260826T125134
DTSTART;TZID=America/New_York:20260715T104500
DTEND;TZID=America/New_York:20260715T120000
SEQUENCE:0
TRANSP:OPAQUE
END:VEVENT
END:VCALENDAR