BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Penn Engineering Events - ECPv6.16.3//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:Penn Engineering Events
X-ORIGINAL-URL:https://seasevents.nmsdev7.com
X-WR-CALDESC:Events for Penn Engineering Events
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:America/New_York
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20230312T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20231105T060000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20240310T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20241103T060000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
TZNAME:EDT
DTSTART:20250309T070000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
TZNAME:EST
DTSTART:20251102T060000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240920T140000
DTEND;TZID=America/New_York:20240920T150000
DTSTAMP:20260603T055912
CREATED:20240828T184618Z
LAST-MODIFIED:20240828T184618Z
UID:12023-1726840800-1726844400@seasevents.nmsdev7.com
SUMMARY:PICS Colloquium: Motion-based rules and solitary waves: ameloblasts and birds
DESCRIPTION:Information is usually expected to propagate across a population of active agents such as living cells or birds in a diffusive manner. Yet waviness in the microstructure of dental enamel implies coherent wave motion among the generative ameloblast cells over exceptionally long periods\, from a week in the mouse to months in the human; and trajectory data for starling flocks show solitary wave disturbances that propagate in much shorter times but with constant speed and amplitude across the entire flock. Necessary conditions for coherent wave behavior include persistent network invariance\, i.e.\, neighbor sets not changing too quickly\, and some form of non-mass inertia. \nIn a top-down strategy\, a wave equation is conjectured for 2D sheets of ameloblasts with a single unknown parameter supplying rate inertia. Optimizing only \, the wave equation can predict the observed cross-sectional shape of the enamel body in the mouse incisor. Nonlinearity in the wave equation gives rise to solitary waves\, which also predict the time of a key transformation in ameloblast behavior. Most interestingly for modeling biological development\, solitary waves coupled explicitly to shape or motility transformations in cells have characteristics determined internally and independent of remote conditions. Complex pattern formation\, e.g.\, segmentation\, can be derived from coupled systems of transformations\, using rules based only on displacements and their derivatives. \nGoverning equations for solitary waves can be constructed for ameloblasts and birds that deal with different variables but are isomorphic and account successfully for observations in both populations\, an instance of substrate independence in rules for emergent behavior.
URL:https://seasevents.nmsdev7.com/event/pics-colloquium-motion-based-rules-and-solitary-waves-ameloblasts-and-birds/
LOCATION:PICS Conference Room 534 – A Wing \, 5th Floor\, 3401 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Penn Institute for Computational Science (PICS)":MAILTO:dkparks@seas.upenn.edu
END:VEVENT
END:VCALENDAR