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DTSTART;TZID=America/New_York:20191125T110000
DTEND;TZID=America/New_York:20191125T123000
DTSTAMP:20260408T093542
CREATED:20191119T150621Z
LAST-MODIFIED:20191119T150621Z
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SUMMARY:ESE Thesis Defense: Zhe Xuan
DESCRIPTION:Title: “Towards Advanced Photonic Integrated Systems through Electronic-Assisted Design” \nAbstract: Optical systems have applications ranging from traditional areas such as communication and spectroscopy to emerging fields such as quantum computing and cryptography. Bench-top optical systems\, using free-space optics or fiber optics with standalone devices\, have been successful. However\, they tend to occupy a large space and are costly to build. With the advance of the photonic integrated circuit\, many of those systems are being integrated on-chip\, promising portable and energy-efficient implementations with orders of magnitude reduction in cost and volume. Similar to the scaling of the electronics\, the scaled photonic devices also give rise to better device performance and eventually better system performance. In this work\, I will leverage the bandwidth\, the low latency and phase coherence of the photonic integrated circuit\, in combination with the processing power and the control capabilities of the electronic integrated circuit\, to enable new functionalities and new architectures of the optical systems. \nDissertation Committee: \nChair: Prof. Jan Van der Spiegel\nSupervisor: Prof. Firooz Aflatouni\nMember: Prof. Nader Engheta\nMember: Prof. Bo Zhen
URL:https://seasevents.nmsdev7.com/event/ese-thesis-defense-zhe-xuan/
LOCATION:Room 307\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Dissertation or Thesis Defense
ORGANIZER;CN="Electrical and Systems Engineering":MAILTO:eseevents@seas.upenn.edu
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20191125T150000
DTEND;TZID=America/New_York:20191125T170000
DTSTAMP:20260408T093542
CREATED:20191016T195431Z
LAST-MODIFIED:20191016T195431Z
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SUMMARY:CBE Dissertation Defense: "Fabrication of Superhydrolic Nanostructured Membranes for Oil/Water Separation
DESCRIPTION:Committee: Daeyeon Lee\, PhD and Shu Yang\, PhD\, Co-Advisors; Kathleen Stebe\, PhD and Amish Patel\, PhD
URL:https://seasevents.nmsdev7.com/event/cbe-dissertation-defense-fabrication-of-superhydrolic-nanostructured-membranes-for-oil-water-separation/
LOCATION:LRSM REading Room 106/107
CATEGORIES:Doctoral,Student,Dissertation or Thesis Defense
ORGANIZER;CN="Chemical and Biomolecular Engineering":MAILTO:cbemail@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20191126T103000
DTEND;TZID=America/New_York:20191126T120000
DTSTAMP:20260408T093542
CREATED:20190924T190845Z
LAST-MODIFIED:20190924T190845Z
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SUMMARY:MEAM Seminar: "Micro/Nanomanufacturing of 3D Functional Coatings via Self-Limiting Electrospray Deposition"
DESCRIPTION:Recent developments in nanostructured materials have demonstrated myriad desirable properties ranging from optical and mechanical metamaterials to biomanipulative surfaces. To bring these properties from the lab to the commercial space will require innovative nanomanufacturing strategies focused on scalable and cost-effective techniques. My lab\, the Hybrid Micro/Nanomanufacturing Laboratory\, applies the manipulation of fundamental driving forces to this challenge through combinations of top-down and bottom-up techniques for new hybrid lithographic strategies. In this seminar\, I will highlight one such strategy: self-limiting electrospray deposition (SLED) of thin film microcoatings. Electrospray deposition is a well-established technique for the creation of thin films from the spray of highly charged droplets loaded with the materials to be deposited. In SLED\, specific manipulation of the electrostatic repulsion\, hydrodynamic forces\, and evaporation kinetics can be employed to conformally cover 3D architectures with microcoatings. The generated coatings are hierarchical\, possessing either nanoshell or nanowire microstructure. Having demonstrated the mechanism of the self-limiting effect\, we have developed the ability to employ materials that would be otherwise incompatible with self-limiting. In this way we have incorporated a wide variety of functional systems\, including: (1) biocompatible\, (2) plasmonic\, (3) elastomerically-toughened composite\, (4) anti-corrosive epoxy or sol gel\, and (5) electrically conductive coatings. We have also characterized the geometric limits of features that can be coated through this approach\, showing that the 3D capabilities increase with decreasing feature size to the micron-scale. This property\, combined with the hierarchical structure of the coatings\, shifts the burden of micro/nanoscale resolution from a costly or slow technique to a more scalable method\, thereby removing barriers for integration into advanced manufacturing techniques such as roll-to-roll or additive manufacturing.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-micro-nanomanufacturing-of-3d-functional-coatings-via-self-limiting-electrospray-deposition/
LOCATION:Glandt Forum\, Singh Center for Nanotechnology\, 3205 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Colloquium
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20191126T110000
DTEND;TZID=America/New_York:20191126T120000
DTSTAMP:20260408T093542
CREATED:20191014T134823Z
LAST-MODIFIED:20191014T134823Z
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SUMMARY:ESE Seminar: "Management Strategies for Hyperscale Datacenters"
DESCRIPTION:Abstract: Hyperscale datacenters provide critical infrastructure for the information economy\, refining data to extract value. Sharing datacenters improves energy efficiency but whether strategic users participate depends on management policies. I address these challenges by integrating practical insights from computer architecture with rigorous methods in algorithmic economics and machine learning. I illustrate this approach for power allocation and performance diagnosis. First\, I allocate server power by anticipating strategic behavior and incentivizing participation. I design mechanisms in which users selfishly draw power to boost performance yet avoid oversubscribing the shared supply. Second\, I diagnose performance anomalies by inferring interpretable causal relationships. I design statistical frameworks that learn performance models and extract recurring semantic structure from these models with natural language processing. Finally\, I conclude by describing future directions for efficient and secure architectures in datacenters and beyond.
URL:https://seasevents.nmsdev7.com/event/ese-seminar-benjamin-lee/
LOCATION:PICS Conference Room 534 – A Wing \, 5th Floor\, 3401 Walnut Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Electrical and Systems Engineering":MAILTO:eseevents@seas.upenn.edu
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