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DTSTART;TZID=America/Los_Angeles:20260108T103000
DTEND;TZID=America/Los_Angeles:20260108T113000
DTSTAMP:20260427T232022
CREATED:20260107T194525Z
LAST-MODIFIED:20260107T194525Z
UID:8395-1767868200-1767871800@www.quantumx.washington.edu
SUMMARY:UW ECE Research Colloquium Series: Milad Koohi\, Texas A&M University
DESCRIPTION:Event interval: Single day eventCampus room: ECE 037Accessibility Contact: events@ece.uw.eduEvent Types: Academics\,Lectures/SeminarsLink: https://www.ece.uw.edu/colloquia/milad-koohi/ \nTowards Agile Radios for NextG Wireless Communications and Sensing \nAbstractAs the demand for higher data capacity persists and wireless technologies advance\, current front-end circuitry in communication systems requires transformative changes. Multifunctional materials\, such as ferroelectrics and ferromagnetics\, are increasingly vital in providing critical solutions for communication\, computation\, and sensing. Integrating such materials into the development of reconfigurable components promises reduced complexity\, smaller size\, and high performance for future radios\, enabling them to transcend beyond 5th generation (5G) wireless technologies. \nIn this talk\, Dr. Koohi will present his research focusing on ferroelectric-based radio frequency (RF) acoustic wave (AW) devices that facilitate efficient spectrum access for future wireless systems. First\, he will describe how the electrostriction phenomenon in thin-film paraelectric barium strontium titanate (Ba(1-x)SrxTiO3) is utilized to develop a framework for building intrinsically reconfigurable AW filter modules. This technology increases the functional density of RF front-ends by combining switching and filtering functionalities onto a single device\, remarkably reducing the size and complexity of future radios. Next\, he will introduce inhomogeneous piezoelectricity as a new paradigm to overcome the fundamental frequency and bandwidth limitations of traditional piezoelectric RF AW technologies. Dr. Koohi will present the first realization of inhomogeneous piezoelectricity in multilayer ferroelectric heterostructures\, providing a fundamentally new approach to synthesize next-generation RF AW devices that are programmable and have the capability to selectively operate across multiple frequency bands. The second part of the talk will explore the ferroelectricity in scandium-doped aluminum nitride (Al(1-x)ScxN) to enable mm-Wave acoustics. He will demonstrate how polarization switching in ferroelectric AlScN allows the realization of mm-Wave acoustic devices with record electromechanical coupling and quality factor values required for the demployment of future 5G+ and 6G radios. \nBio Prof. Milad Koohi received his Ph.D. in Electrical Engineering from the University of Michigan\, Ann Arbor\, in 2020. Following his doctoral studies\, he joined Qorvo Inc. as an R&D Technical Lead at the BAW Research Center in FL\, where he led the integration of ferroelectric nitrides into acoustic wave devices for microwave and mm-wave frequencies. In January 2025\, he transitioned to academia\, joining the Department of Electrical Engineering at Texas A&M University. Prof. Koohi’s research focuses on understanding multiphysical domain interactions\, particularly in the electromagnetic\, acoustic\, and optical domains\, within emerging material systems and integrating them into innovative devices\, microsystems\, and integrated circuits\, advancing the frontiers of communication\, computation\, and sensing technologies. He has received several awards\, including the Qorvo Best New Technology Award and the IEEE MTT-S Graduate Fellowship. Dr. Koohi has authored or coauthored more than 40 peer-reviewed publications and patents on ferroelectric nitrides\, complex oxides\, and their incorporation into novel devices and integrated circuits.
URL:https://www.quantumx.washington.edu/calendar/uw-ece-research-colloquium-series-milad-koohi-texas-am-university/
LOCATION:Washington
CATEGORIES:Electrical & Computer Engineering
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20260120T150000
DTEND;TZID=America/Los_Angeles:20260120T160000
DTSTAMP:20260427T232022
CREATED:20260115T200030Z
LAST-MODIFIED:20260120T203027Z
UID:8525-1768921200-1768924800@www.quantumx.washington.edu
SUMMARY:Seminar with scholars from Seoul National University
DESCRIPTION:Event interval: Single day eventCampus location: Bill & Melinda Gates Center for Computer Science & Engineering (CSE2)Campus room: 371Accessibility Contact: aafrontdesk@uw.eduEvent Types: Lectures/Seminars \nWe have two great speakers\, both PhD candidates in mechanical engineering from Seoul National University! \n1. Youngkwon “YK” KimModular Reconfigurability for Auxiliary Attitude Control \nAbstractThe evolution of spaceborne structures is increasingly driven by modular design principles that enable adaptable\, scalable\, and multifunctional operational capabilities. From deployable arrays to robotic servicing platforms\, such modularity is redefining how spacecraft adapt to evolving mission requirements. In this work\, we investigate how structural metamorphism within multifunctional modular assemblies can be exploited as an auxiliary attitude-control mechanism for spacecraft. We consider a reconfigurable modular chain–spacecraft assembly in which the modular units can fold\, deploy\, and reorient relative to one another\, thereby altering the overall configuration and tuning the spacecraft’s inertia properties through internal momentum exchange. \n To evaluate the resulting attitude-control capability\, we develop a three-dimensional multibody dynamics simulation framework that models reconfigurable modular assemblies attached to a base spacecraft hub under free-floating conditions. Numerical results show that appropriately designed reconfiguration sequences of the modular units can generate desired counter-translations and rotations of the base hub. We demonstrate that the achievable attitude-control maneuvers are strongly influenced by both the sequence and the combination of modular reconfigurations. Moreover\, navigating alternate morphing paths to the same final configuration yields distinct inertia-evolution trajectories\, each imparting a unique influence on the spacecraft orientation. We further investigate the influence of inter-module connectivity on the attainable attitude-control range\, highlighting the potential of reconfigurable modular structures to serve as an auxiliary attitude-control system and to support extended operational lifetimes for advanced space missions. \nBio :Youngkwon “YK” Kim is a second-year Ph.D. candidate in Mechanical Engineering at Seoul National University\, working with Prof. Jinkyu Yang (formerly in the Department of Aeronautics & Astronautics at the University of Washington\, 8/2013–9/2022). His research focuses on shape-morphing and transformative structures for space systems and wearable devices. Parts of this work will also be presented at the AIAA (American Institute of Aeronautics and Astronautics) SciTech 2026 Forum. YK is passionate about sharing knowledge and supporting students’ growth: he has written a book on effective learning in university (“How Can We Study Effectively in the University System? – Key Factor: Proactive Questions”) and serves as the head of the department’s largest community (about 640 students) in the Department of Mechanical Engineering at Inha University. He also actively collaborates with international research groups at the University of Washington (USA)\, BITS Pilani (India)\, and KAIST (Korea). \n2. Myeonggyun JooExpandability of Simple Linkage: Localization and Topology \nAbstract: In this talk\, I will introduce an asymmetric linkage system that is structurally simple yet exhibits remarkably unique behavior. Inspired by natural mechanisms\, this system consists of two slanted bars connected by a rail and a torsional spring. Depending on where the torsional spring is placed—at the top hinge or the bottom hinge—the system can be modeled in two distinct ways.Modeling 1 places the torsional spring at the top hinge and is more straightforward to analyze. Using mathematical techniques\, the system matrix can be simplified\, enabling eigen analysis that reveals the presence of edge modes. By tuning geometric parameters\, this model demonstrates an extremely localized phenomenon known as the Singular Edge Mode\, in which only the first unit cell oscillates.Modeling 2 places the torsional spring at the bottom hinge and exhibits a more robust form of edge localization. Due to the system’s inherent asymmetry\, this configuration has nontrivial topological characteristics. Regardless of where the system is excited\, the edge cell consistently shows accumulated localized behavior\, serving as evidence of a Topological Edge Mode.Because of its simplicity\, tunability\, and the richness of its edge phenomena\, this asymmetric linkage system offers strong potential for applications in various mechanical and metamaterial design contexts. \nBio :Myeonggyun Joo is a second-year Ph.D. candidate in Mechanical Engineering at Seoul National University\, working under the supervision of Prof. Jinkyu Yang (formerly in the Department of Aeronautics & Astronautics at the University of Washington\, 2013–2022). His research focuses on wave dynamics\, topological mechanical metamaterials\, and the design and fabrication of architected structures. Portions of this work were presented at the PHONONICS 2025 conference. Publications on this topic are currently in preparation in collaboration with international research groups at IIS (India) and CNRS (France). He aims to uncover new physical mechanisms in mechanical systems that enable programmable dynamics and multifunctional responses. He is also deeply interested in cross-disciplinary collaborations that bridge metamaterials with fields such as robotics and aerospace engineering.
URL:https://www.quantumx.washington.edu/calendar/seminar-with-scholars-from-seoul-national-university/
LOCATION:Bill & Melinda Gates Center for Computer Science & Engineering (CSE2)
CATEGORIES:Electrical & Computer Engineering
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DTSTART;TZID=America/Los_Angeles:20260121T160000
DTEND;TZID=America/Los_Angeles:20260121T170000
DTSTAMP:20260427T232022
CREATED:20260115T200030Z
LAST-MODIFIED:20260121T203029Z
UID:8526-1769011200-1769014800@www.quantumx.washington.edu
SUMMARY:UW ECE Special Research Lecture: Francois Rivet\, University of Bordeaux\, France
DESCRIPTION:Event interval: Single day eventCampus room: EEB 269Accessibility Contact: events@ece.uw.eduEvent Types: Academics\,Lectures/SeminarsEvent sponsors: IEEE Solid-State Circuit Society\, Seattle Chapter \nLet's Connect Intelligences \nAbstractWho remembers a world without cell phones\, the Internet\, and ChatGPT? Radio Frequency Integrated Circuits (RFIC) have enabled democratizing communications with ever-greater data exchanges. At the IMS laboratory\, we invent the technology and systems that allow us to increase the communication potential from one generation to the next tenfold: goodbye 4G and soon 5G\, we are making 6G with the following generation in our sights. What more can we connect and how? Get ready for the revolution where human and artificial intelligences will communicate in tomorrow'snetworks with integrated circuits we will invent now. \nBioFrancois Rivet received his Master's and Ph.D. degrees in 2005 and 2009 from the University of Bordeaux\, France. Since June 2010\, he has been tenured as an Associate Professor at the Bordeaux Institute of Technology (Bordeaux INP). His research is focused on the design of RFICs in the IMS Laboratory\, the University of Bordeaux microelectronics laboratory. In 2014\, he founded the "Circuits and Systems" research team. Rivet has publications in top-ranked journals\, international and national conferences\, and holds 20 patents. He is involved in several Steering and Technical Program Committees of flagship conferences. He was General Chair of the IEEE Radio Frequency Integrated Circuits Symposium (RFIC) in 2025 in San Francisco\, USA. He is a member of the Board of Governors of the IEEE Circuits and Systems Society since 2024.
URL:https://www.quantumx.washington.edu/calendar/uw-ece-special-research-lecture-francois-rivet-university-of-bordeaux-france/
LOCATION:Washington
CATEGORIES:Electrical & Computer Engineering
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