BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Memento EPFL// BEGIN:VEVENT SUMMARY:Low Frequency Wireless Power Transfer for Biomedical Implants DTSTART:20200406T121500 DTEND:20200406T130000 DTSTAMP:20260610T054617Z UID:5d12a0b9716593465dbda98f82e832a4a4c47c42e0d9a80ec5d1145b CATEGORIES:Conferences - Seminars DESCRIPTION:Prof. Dr. Shad Roundy\,\nUniversity of Utah\nInstitute of Micr oengineering - Distinguished Lecture\n\nDue to the covid-19 related restri ctions currently in place\, the lecture will be held remotely by zoom only .\n\nZoom Live Stream: https://epfl.zoom.us/j/975059431\n\nAbstract: Biome dical implants hold the promise of dramatically improving our health and w ell-being by\, for example\, enabling us to pro-actively monitor health th rough real-time tracking of internal body chemistry (e.g. pH\, glucose\, l actate\, tissue oxygen)\, treat diseases through targeted and tailored dru g delivery\, treat neural disorders through neural prostheses\, etc.  Fur thermore\, advances in flexible integrated circuit technology and micro sc ale sensing can currently enable extremely small (< 1mm3)\, complex\, biom edical implants.  However\, systems of this size are almost never actuall y realized because the power system (e.g. a battery) is too large.  RF po wer transmission for implants has been widely investigated. However\, for very small implants (~ mm3) RF power suffers from low achievable power den sity at the implant given safety constraints.\nThis talk will discuss two alternative methods for wirelessly delivering power to biomedical implants : acoustics and low frequency magnetic fields using magnetoelectric transd ucers. Acoustic power transmission exhibits high power density given its l ow attenuation in soft tissue and relatively less restrictive safety limit ations. Its disadvantages are that acoustic power does not travel well thr ough bone and the external transmitter requires intimate contact with skin . In this talk we will cover acoustic power transmission systems and demon strate a novel glucose sensing mechanism that can be powered acoustically. Low frequency magnetic fields coupled to magnetoelectric transducers offe r a promising alternative to both RF and acoustic power transmission. In t his system\, a standard coil is used as a transmitter\, but the implantabl e receiver is made from magnetoelectric laminates (i.e. laminates of magne tostrictive and piezoelectric material). The magnetoelectric receivers hav e a much more favorable frequency/size relationship than standard RF recei vers\, enabling higher power density at lower frequencies that are safer f or humans and have lower attenuation in tissue. In this talk I will discus s system and receiver design optimization for magnetoelectric based wirele ss power transfer systems. These systems are still early stage\, and there is much room for innovation and improvement.\n\nBio: Shad Roundy is the d irector of the Integrated Self-Powered Sensing lab at the University of Ut ah which focuses on energy harvesting\, wireless power transfer\, and more generally applications of ubiquitous wireless sensing. Shad received his PhD in Mechanical Engineering from the University of California\, Berkeley in 2003.  From there he moved to the Australian National University wher e he was a senior lecturer in the Systems Engineering Department.  He spe nt the next several years working with startup companies LV Sensors and Ec oHarvester developing MEMS pressure sensors\, accelerometers\, gyroscopes\ , and energy harvesting devices.  In 2012\, he re-entered academia joinin g the mechanical engineering faculty at the University of Utah.  Dr. Roun dy is the recipient of the National Science Foundation CAREER Award\, DoE Integrated Manufacturing Fellowship\, the Intel Noyce Fellowship\, and was named by MIT’s Technology Review as one of the world’s top 100 young innovators for 2004.\n\nNote: The Seminar Series is eligible for ECTS cred its in the EDMI doctoral program\n  LOCATION:ONLINE ONLY https://epfl.zoom.us/j/975059431 STATUS:CONFIRMED END:VEVENT END:VCALENDAR