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DTSTART;TZID=America/New_York:20201215T120000
DTEND;TZID=America/New_York:20201215T130000
DTSTAMP:20260407T112916
CREATED:20201208T163504Z
LAST-MODIFIED:20201208T163504Z
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SUMMARY:ESE Seminar: "Learning is Pruning"
DESCRIPTION:The strong lottery ticket hypothesis (LTH) postulates that any neural network can be approximated by simply pruning a sufficiently larger network of random weights. Recent work establishes that the strong LTH is true if the random network to be pruned is a large poly-factor wider than the target one. This polynomial over-parameterization is at odds with experimental research that achieves good approximation by pruning networks that are only a small factor wider than the target one. In this talk\, I will tell you how we close this gap and offer an exponential improvement to the over-parameterization requirement. I will give a sketch of the proof that any target network can be approximated by pruning a random one that is only a logarithmic factor wider. This is possible by establishing a connection between pruning random ReLU networks and random instances of the weakly NP-hard SubsetSum problem. Our work indicates the existence of a universal striking phenomenon: neural network training is equivalent to pruning slightly overparameterized networks of random weights. I will conclude with sharing hints of a general framework indicating the existence of good pruned networks for a variety of activation functions\, architectures\, even applicable for the case where both initialization weights and activations are binary.
URL:https://seasevents.nmsdev7.com/event/ese-seminar-learning-is-pruning/
LOCATION:Zoom – Email ESE for Link jbatter@seas.upenn.edu
CATEGORIES:Seminar,Faculty,Colloquium,Graduate,Undergraduate
ORGANIZER;CN="Electrical and Systems Engineering":MAILTO:eseevents@seas.upenn.edu
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DTSTART;TZID=America/New_York:20201216T103000
DTEND;TZID=America/New_York:20201216T123000
DTSTAMP:20260407T112916
CREATED:20201201T184857Z
LAST-MODIFIED:20201201T184857Z
UID:10006554-1608114600-1608121800@seasevents.nmsdev7.com
SUMMARY:Doctoral Dissertation: "Implantable Micro-Tissue Engineered Nerve Grafts to Maintain Regenerative Capacity and Facilitate Functional Recovery Following Nervous System Injury" (Justin Burrell)
DESCRIPTION:The Department of Bioengineering at the University of Pennsylvania and Dr. D. Kacy Cullen are pleased to announce the Doctoral Dissertation Defense of Justin Burrell. \nTitle:  Implantable Micro-Tissue Engineered Nerve Grafts to Maintain Regenerative Capacity and Facilitate Functional Recovery Following Nervous System Injury  \nThe public is welcome to attend virtually via Bluejeans.
URL:https://seasevents.nmsdev7.com/event/doctoral-dissertation-implantable-micro-tissue-engineered-nerve-grafts-to-maintain-regenerative-capacity-and-facilitate-functional-recovery-following-nervous-system-injury-justin-burrell/
LOCATION:PA
CATEGORIES:Student,Dissertation or Thesis Defense
ORGANIZER;CN="Bioengineering":MAILTO:be@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20201217T100000
DTEND;TZID=America/New_York:20201217T110000
DTSTAMP:20260407T112916
CREATED:20201201T181615Z
LAST-MODIFIED:20201201T181615Z
UID:10006553-1608199200-1608202800@seasevents.nmsdev7.com
SUMMARY:MEAM Ph.D. Thesis Defense: "Structural and Mechanical Responses to Intermittent Parathyroid Hormone Treatment\, Discontinuation\, and Cyclic Administration Regimens"
DESCRIPTION:Bone mineral density rapidly decreases upon withdrawal from intermittent parathyroid hormone (PTH) treatment despite its potent effect of promoting bone formation. To better understand this adverse phenomenon\, this study first aimed to investigate the phenotype of PTH withdrawal in both intact and estrogen-deficient rat model by using a well-designed experiment combined with innovative longitudinal imaging techniques and localized cellular activities. Due to observing a continuous anabolic window upon early discontinuation of PTH treatment in estrogen-deficient animals\, we propose a potential effective treatment strategy\, the short cycles of PTH and antiresorptive treatment regimen\, which could extend the anabolic windows by increasing the number of newly activated modeling-based bone formation (MBF) sites. Lastly\, to understand the structure-function relationships of bone tissue formed through MBF compared to the remodeling-based bone formation (RBF)\, we developed an innovative imaging platform with a mechanical testing platform to determine the mechanical properties of MBF and RBF and their long-term contributions in intact animals.
URL:https://seasevents.nmsdev7.com/event/meam-ph-d-thesis-defense-discontinuation-of-intermittent-parathyroid-hormone-and-potential-osteoporosis-treatment-strategy/
LOCATION:Zoom – Email MEAM for Link\, peterlit@seas.upenn.edu
CATEGORIES:Seminar,Dissertation or Thesis Defense
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
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