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SUMMARY:ChE Seminar Series: Engineering directed Transport and Collective Dynamics of Charged Colloids under Electric Fields
DESCRIPTION:ChE Seminar Series Presents: \nDr. Carlos A. Silvera Batista \nDepartment of Chemical & Biomolecular Engineering \nVanderbilt University \nEngineering directed Transport and Collective Dynamics of Charged Colloids under Electric Fields \nAbstract: \nGradients in electrical potential (electric fields)\, along with gradients in concentration of ionic species\, are a principal way to control the motion of colloids. The surface and body forces that electric fields exert on anisotropic colloids have opened new applications in self-propulsion\, transport of cargo\, dynamic assembly\, and directed assembly. This talk focuses on the long-range transport of charged colloids\, as well as on the dynamic assembly of anisotropic and active colloids. In the first part\, we present a study of the dynamics of charged colloids under direct currents and gradients of chemical species (electrodiffusiophoresis). In our approach\, we developed a method to simultaneously visualize the progression of concentration polarization and the ensuing dynamics of charged colloids near electrodes. With the aid of confocal microscopy\, we show that the passage of current through water induce the focusing and aggregation of charged colloids away from both electrodes. Preliminary experiments show that this phenomenon can potentially be useful to perform focusing\, trapping and separation operations in lab-on-a-chip devices. In the second part\, we discuss strategies to tailor the propulsion and collective dynamics of Janus particles (JPs) under electric fields. We engineer the relaxation time of JPs by controlling the properties of the medium and the particles. The insights from this study provide helpful quantitative information for the design of colloidal machines with targeted propulsion\, interparticle interactions and collective dynamics. In addition\, our results provide the experimental basis for the design of non-equilibrium strategies for materials fabrication. \nBio: \nDr. Carlos A. Silvera Batista initiated undergraduate studies in chemical engineering at the Universidad de San Buenaventura (Cartagena\, Colombia) and subsequently obtained a bachelor’s degree from the City College of New York (CCNY). Dr. Silvera began his research trajectory as an LSAMP scholar under the guidance of Prof. Ilona Kretzschmar (CCNY). After earning a PhD in chemical engineering from the University of Florida\, Dr. Silvera held postdoctoral positions at the National Institute of Standards and Technology and at the University of Michigan\, where he received the President’s Postdoctoral Fellowship. Currently\, as an assistant professor at Vanderbilt University\, his research interest is on the electrokinetics and directed assembly of colloidal systems.  His research work has resulted in over 20 peer-reviewed publications in high-impact scientific journals\, such as JACS\, ACS Nano\, Langmuir and Science. \n 
URL:https://che.northeastern.edu/event/che-seminar-series-engineering-directed-transport-and-collective-dynamics-of-charged-colloids-under-electric-fields/
LOCATION:108 SN
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DTSTART;TZID=America/New_York:20211027T140000
DTEND;TZID=America/New_York:20211027T150000
DTSTAMP:20260414T003338
CREATED:20211021T174450Z
LAST-MODIFIED:20211021T174450Z
UID:3843-1635343200-1635346800@che.northeastern.edu
SUMMARY:LEADERs Event: AI Challenges in the Deployment of Advanced Driver-Assistance Systems
DESCRIPTION:This presentation will help attendees learn about integrating AI in auto industry. While AI has been able to achieve remarkable success over the last 10 years\, can it really be trusted?  What does trustworthy AI look like in the context of connected vehicles and advanced driver-assistance systems (ADAS)?  To create an ADAS for all\, it’s paramount that the AI systems in the vehicle be trusted and work for everyone.  This is especially important given the nature of ADAS as a safety-critical\, cyber-physical\, and people-centric system of systems.  In this talk\, the presenter will outline a number of challenges in building AI systems which could potentially be deployed in future ADAS. \nSpeaker Dr. Jacob Bond leads trustworthy AI research at General Motors R&D.  In addition to his work on ensuring AI systems in the vehicle can be trusted\, his research looks at how to keep AI systems private and how to ensure cloud and vehicle systems can establish secure communications.  After receiving a Ph.D. in computational mathematics and cryptography from Purdue University\, he joined General Motors’ Product Cybersecurity organization\, focusing on applications of public-key cryptography.  Jacob then began investigating the security of AI systems\, moving to GM R&D and expanding his work to encompass the trustworthiness of AI systems.
URL:https://che.northeastern.edu/event/leaders-event-ai-challenges-in-the-deployment-of-advanced-driver-assistance-systems/
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