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DTSTART;TZID=America/New_York:20210427T110000
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DTSTAMP:20260508T035255
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SUMMARY:Rare Earth Element-Based Magnets: Science\, Supply and Sustainability in 2021 and Beyond
DESCRIPTION:University Distinguished Professor Vincent Harris is presenting “Rare Earth Element-Based Magnets: Science\, Supply and Sustainability in 2021 and Beyond” as part of the Jefferson Science Fellowship Program of the National Academies of Sciences and Engineering. \nRegistration is required in advance of the lecture: Register here \nRare earth elements (REEs) and their supply chain have become topics of great interest to the U.S. diplomatic and national security communities. Presently\, China dominates REE markets in all facets of processing from earth extraction to metals as well as value and commercialization verticals. Beijing has shown no hesitancy in using its position of market dominance to advance its broader political goals and agendas. \nIn this presentation\, we focus on REE-based magnets and associated challenges faced in 2021. We explore REE science and applications\, supply and policy\, and sustainability and environmental impact. We examine what the future holds in terms of alternative sources\, recycling\, and the practice of designing components around the need to employ REEs. Finally\, we report on steps taken by the global community to offset China’s monopoly on rare earths.
URL:https://coe.northeastern.edu/event/rare-earth-element-based-magnets-science-supply-and-sustainability-in-2021-and-beyond/
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DTSTART;TZID=America/New_York:20210427T150000
DTEND;TZID=America/New_York:20210427T160000
DTSTAMP:20260508T035255
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SUMMARY:ECE PhD Dissertation Defense: Yue Zheng
DESCRIPTION:PhD Dissertation Defense: Modular Plug-and-Play Photovoltaic Subpanel System \nYue Zheng \nLocation: Zoom Link \nAbstract: This thesis designs\, builds and tests plug-and-play photovoltaic (PV) panels. A prototype modular PV system is built consisting of a dozen small PV units that can slide in and out of a mechanical frame without impacting other units. Each unit contains one PV subpanel and a DC-DC converter with a distributed maximum power point tracking (dMPPT) control board. Each PV unit works at its maximum power\, while every output of the converter is connected in parallel to a DC bus. A new combined control strategy is proposed in which the decision to use centralized or distributed control depends on the system efficiency at the varying load operating points. A disadvantage of this dMPPT structure is that in each PV unit\, the DC-DC converter must convert the entire power from its PV subpanel. Therefore\, this research also explores the use of Differential Power Processing (DPP) system\, which harvests maximum power while only processing a small amount of power due to the mismatches between PV panels. Thus\, DPP structure reduces power loss compared to traditional dMPPT structure. Since it processes only a small amount of power\, differential power processing structure has the potential to further be integrated on a chip and become installed in the junction box during the assembling process. Finally\, the research proposes to implement the plug-and-play features of the solar PV system using wireless power transfer (WPT) instead of hard wire connectors. A series-to-series topology of WPT system (L-R-C series circuit) for one PV unit is proposed. In this system\, the DC-DC converter on the PV side is used to perform MPPT\, while the DC-AC inverter simultaneously perturbs its switching frequency to match possible variations in resonance frequencies. Wireless communication is used between transmitter and receiver. Thus\, the maximum efficiency point on the constant output voltage trajectory can be tracked dynamically under wide and varying operating conditions.
URL:https://coe.northeastern.edu/event/ece-phd-dissertation-defense-yue-zheng/
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DTSTART;TZID=America/New_York:20210427T180000
DTEND;TZID=America/New_York:20210427T193000
DTSTAMP:20260508T035255
CREATED:20210421T142251Z
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SUMMARY:NE GWISE Presents Dr. Adriana Bankston\, Science Policy Workshop
DESCRIPTION:NE GWiSE is excited to announce the sixth seminar in our “Building Inclusive Communities” 2020-21 virtual series\, which will take place on Tuesday\, April 27th from 6:00-7:30pm. \nThis month’s speaker\, Dr. Adriana Bankston\, is a Principal Legislative Analyst in the University of California (UC) Office of Federal Governmental Relations\, where she serves as an advocate for UC with Congress\, the Administration\, and federal agencies. She’s also the new CEO and Managing Publisher of the Journal of Science Policy & Governance. \nDuring this interactive workshop\, Dr. Bankston will cover effective strategies for graduate students to communicate their research to policymakers\, both orally and in writing. She will discuss different types of policy writing and how to tailor your message to a specific audience within the current political context. The session will also provide opportunities to practice speaking and writing on a policy topic of your choice. \nThe event is free to attend and open to all genders. It will be held on Tuesday\, April 27th from 6:00-7:30PM EST. Learn more about the event and RSVP!
URL:https://coe.northeastern.edu/event/ne-gwise-presents-dr-adriana-bankston-science-policy-workshop/
ORGANIZER;CN="GWiSE%3A Graduate Women in Science and Engineering":MAILTO:gwise.neu@gmail.com
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