{ "96539-21792637": { "datetime_modified":"20220805T103221", "datetime_start":"20220810T120000", "datetime_end":"20220810T130000", "has_end_time":1, "date_start":"2022-08-10", "date_end":"2022-08-10", "time_start":"12:00:00", "time_end":"13:00:00", "time_zone":"America\/Detroit", "event_title":"Effects of Electric Stimulation on Physiology and Anatomy of the Visual Pathway", "occurrence_title":"", "combined_title":"Effects of Electric Stimulation on Physiology and Anatomy of the Visual Pathway: BME Ph.D. Defense:\u00a0Beomseo Koo", "event_subtitle":"BME Ph.D. Defense:\u00a0Beomseo Koo", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Abstract:\r\nRetinal degenerative diseases that progressively lead to severe blindness impact the affected individual\u2019s quality-of-life. Visual prosthesis technology aims to provide an individual a potential means of obtaining visual information lost to them by blindness. Since the proof-of-concept success in 1968 of a device implanted in a human, visual prostheses have had sustained academic research and commercial interest. However, commercial failure of two retinal prosthesis device has raised concerns for the visual prosthesis field. To learn from this experience, research in this dissertation is aimed at understanding the impact of electric stimulation on the target neural tissue and investigating technology for a visual cortex prosthesis, which can reach a larger patient population (compared to a retinal prosthesis).\r\n\r\nMy first set of experiments assessed, in an animal model of retinal degeneration, the condition of the brain and its ability to receive artificial vision information. Retinitis Pigmentosa has been proven to impact the human brain. My study investigated the extent to which this was replicated in a rat animal model of a single genetic mutation of Retinitis Pigmentosa. The P23H-1 rat was investigated with electrophysiology and immunohistochemistry to understand the brain\u2019s function and structural condition. The rat brain\u2019s response to light and electric stimulation was investigated, and the change of visually evoked responses and maintenance of electrically evoked responses was observed. Histology images show a relatively stable macrostructure of the blind rat brain.\r\n\r\nI also performed retinal and cortical implant procedures to test newly developed visual prosthesis technology to enable investigations into researching neural change occurring from blindness and electric stimulation. A retinal device with Parylene-C as its main component was tested and its feasibility in the small eye of a rat animal model was investigated. The device can survive 4-weeks of implantation and is stable within the eye. In support of the development of a novel cortical visual prosthesis device that fits the need of blind individuals, I used a small animal model first to prove the efficacy and safety of a novel neurostimulation electrode. The device, named StiMote, is in preclinical development. I worked to characterize the full ability of the neural interface, High-Density Carbon Fibers with electrodeposited Platinum-Iridium. The ability of PtIr-HDCF as a recording and stimulation neural interface device was verified using electrochemical measurements before, during, and after a long-duration 7-hour electric stimulation session that simulates a full day of device use.\r\n\r\nPtIr-HDCF as a neural interface device was verified by my previous work and its improvement in reducing neuroinflammatory response compared to other microelectrode array archetypes has been previously researched. As a result, PtIr-HDCF can be used as a device to monitor the brain and can better extract the effect of electric stimulation on the brain alone. I recorded neural electrophysiology to verify the rat brain\u2019s sensitivity to stimuli before and after 7-hour stimulation. To supplement the already existing neural implant and electric stimulation inflammation data, Spatial Transcriptomics as a novel method to define electric stimulation safety was performed. Spatial Transcriptomics showed that PtIr-HDCF, when compared to a conventional microwire array, performs better in sustaining neural health by reducing neuroinflammation and eliciting mRNA upregulation of neurotrophic factors.\r\n\r\nFindings of this project can be used to better inform future investigations into brain electrophysiology and transcriptomics projects aimed to understand the neural change from blindness and electric stimulation.\r\n\r\nCommittee Chair(s): Dr. James Weiland\r\n\r\nLocation: 1501 Auditorium, NCRC Bldg 32 & https:\/\/umich.zoom.us\/j\/91500987159?pwd=RWIvQkZVT2FHZjQ2S1BBS2k0ck1SUT09", "occurrence_notes":null, "guid":"96539-21792637@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/96539", "building_id":"", "building_name":"", "campus_maps_id":"", "room":"1501 Auditorium", "location_name":null, "has_livestream":1, "livestream_type":"zoom", "livetream_require_login":0, "livestream_id":"91500987159", "livestream_password":"RWIvQkZVT2FHZjQ2S1BBS2k0ck1SUT09", "livestream_link":"https:\/\/umich.zoom.us\/j\/91500987159", "cost":"", "tags":["Science","biomedical","biomedical engineering","Bioninterfaces","Biosciences","bme","engineering","Medicine","Michigan Engineering","Public Health","Research","Life Science"], "website":"", "sponsors":[ { "group_name":"Biomedical Engineering", "group_id":"1143", "website":"https:\/\/www.facebook.com\/profile.php?id=100094127215673" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2022\/08\/event_96539_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_thumb\/media\/attachments\/2022\/08\/event_96539_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2022\/08\/event_96539_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2022\/08\/event_96539_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2022\/08\/event_96539_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb\/media\/attachments\/2022\/08\/event_96539_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_thumb_square\/media\/attachments\/2022\/08\/event_96539_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large\/media\/attachments\/2022\/08\/event_96539_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/resolve\/group_large_lightbox\/media\/attachments\/2022\/08\/event_96539_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_large_crop\/media\/attachments\/2022\/08\/event_96539_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_list\/media\/attachments\/2022\/08\/event_96539_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2022\/08\/event_96539_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2022\/08\/event_96539_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2022\/08\/event_96539_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2022\/08\/event_96539_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/resolve\/event_feature_thumb\/media\/attachments\/2022\/08\/event_96539_original-1.png" }, "occurrence_count":1, "first_occurrence":21792637 } , "96286-21792234": { "datetime_modified":"20220825T063138", "datetime_start":"20220810T120000", "datetime_end":"20220810T123000", "has_end_time":1, "date_start":"2022-08-10", "date_end":"2022-08-10", "time_start":"12:00:00", "time_end":"12:30:00", "time_zone":"America\/Detroit", "event_title":"Get to Know the Disney College Program", "occurrence_title":"", "combined_title":"Get to Know the Disney College Program", "event_subtitle":"", "event_type":"Careers \/ Jobs", "event_type_id":"2", "description":"Come join Recruiters with Disney Programs Recruitment Team, for a virtual engagement session where they will help you learn more about the Disney College Program and discuss the living, learning and earning components offered. This 30-minute session aims to inform you about the Disney College Program, answer your questions and get you excited to learn more about this opportunity of a lifetime!", "occurrence_notes":null, "guid":"96286-21792234@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/96286", "building_id":"", "building_name":"", "campus_maps_id":"", "room":"", "location_name":"", "has_livestream":0, "cost":"", "tags":[], "website":"", "sponsors":[ { "group_name":"University Career Center UCC", "group_id":"1140", "website":"http:\/\/careercenter.umich.edu" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21792234 } , "96324-21792270": { "datetime_modified":"20220728T155351", "datetime_start":"20220810T120000", "datetime_end":"20220810T170000", "has_end_time":1, "date_start":"2022-08-10", "date_end":"2022-08-10", "time_start":"12:00:00", "time_end":"17:00:00", "time_zone":"America\/Detroit", "event_title":"ITS Teaching & Learning 2022 Summit", "occurrence_title":"", "combined_title":"ITS Teaching & Learning 2022 Summit: MiVideo, Canvas, and Instructional Technology", "event_subtitle":"MiVideo, Canvas, and Instructional Technology", "event_type":"Conference \/ Symposium", "event_type_id":"5", "description":"Join us for the two day ITS Teaching & Learning 2022 Summit on Tuesday, August 9, and Wednesday, August 10, Noon\u20135 p.m. each day. This hybrid event will be at 1010 Weiser Hall and open to all U-M staff and faculty. Explore new and existing educational technology tools available at U-M and take advantage of this opportunity to exchange ideas with colleagues from across the university. Lunch, swag, and sessions will be provided for in-person attendees and online participants will join via Kaltura\u2019s new Events Platform site, which we are piloting for this summit.\r\n \r\nREGISTER\r\n-------------------\r\nPlease register separately for each day of the summit you would like to attend. In-person attendees need to register by end of the day, August 4, to ensure they will receive lunch on the day of the event.\r\n \r\nTuesday, August 9 MiVideo Summit Registration\r\n - https:\/\/mivideo.events.kaltura.com\/register\r\nWednesday, August 10 Canvas\/Instructional Technology Summit Registration\r\n - https:\/\/teachingandlearning.events.kaltura.com\/register\r\n \r\nVisit the ITS Teaching & Learning 2022 Summit website for more information and an agenda summary. We will be offering lunch and light refreshments. We ask that you register for each day\u2019s event so we can get an accurate count of the food order.", "occurrence_notes":"Hybrid option available", "guid":"96324-21792270@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/96324", "building_id":"1000165", "building_name":"Weiser Hall", "campus_maps_id":"47", "room":"1010", "location_name":"Weiser Hall", "has_livestream":0, "cost":"", "tags":["Inclusion","Hybrid","Free","Faculty","Electrical Engineering and Computer Science","Diversity Equity and Inclusion","Discussion","Data Science","conference","accessibility","assistive technology","Canvas","information and technology","Interdisciplinary","Lecture","Luncheon","michigan it","Professional Development","Scholarship","software","Teaching And Learning","Training","Webinar","workshop"], "website":"https:\/\/its.umich.edu\/academics-research\/teaching-learning\/ITS-teaching-learning-2022-Summit", "sponsors":[ { "group_name":"Information and Technology Services (ITS)", "group_id":"1179", "website":"https:\/\/x.com\/umichTECH" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2022\/07\/event_96324_original-1.png", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2022\/07\/event_96324_original-1.png", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2022\/07\/event_96324_original-1.png", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2022\/07\/event_96324_original-1.png", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2022\/07\/event_96324_original-1.png", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2022\/07\/event_96324_original-1.png", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2022\/07\/event_96324_original-1.png", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2022\/07\/event_96324_original-1.png", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2022\/07\/event_96324_original-1.png", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2022\/07\/event_96324_original-1.png", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2022\/07\/event_96324_original-1.png", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2022\/07\/event_96324_original-1.png", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2022\/07\/event_96324_original-1.png", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2022\/07\/event_96324_original-1.png", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2022\/07\/event_96324_original-1.png", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2022\/07\/event_96324_original-1.png" }, "occurrence_count":2, "first_occurrence":21792269 } , "40967-21788209": { "datetime_modified":"20240116T141648", "datetime_start":"20220810T120000", "datetime_end":"20220810T123000", "has_end_time":1, "date_start":"2022-08-10", "date_end":"2022-08-10", "time_start":"12:00:00", "time_end":"12:30:00", "time_zone":"America\/Detroit", "event_title":"North Campus Mindfulness Meditation Drop-In (Online)", "occurrence_title":"", "combined_title":"North Campus Mindfulness Meditation Drop-In (Online)", "event_subtitle":"", "event_type":"Well-being", "event_type_id":"12", "description":"Take a moment to create some space to breathe and invite a sense of calm into your day. This is a guided mindfulness meditation drop-in session. No experience necessary. Free and open to all. \r\n\r\nEmail dmitryb@umich.edu to sign up for the mailing list. You will receive a weekly reminder with the zoom link. Also, you can add the sessions to your Google Calendar: https:\/\/tinyurl.com\/y3kbkwd6", "occurrence_notes":null, "guid":"40967-21788209@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/40967", "building_id":"null", "building_name":"Off Campus Location", "campus_maps_id":"1", "room":"", "location_name":"Virtual", "has_livestream":0, "cost":"", "tags":["Meditation","Health & Wellness","Mindfulness","Mindfulness, Meditation","North campus","Stress Reduction","Virtual","Well-being"], "website":"", "sponsors":[ { "group_name":"Mindfulness @ Umich", "group_id":"3162", "website":"http:\/\/sitemaker.umich.edu\/mindfulness\/mindfulness_meditation__fall_2012" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2017\/05\/event_40967_original.jpeg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2017\/05\/event_40967_original.jpeg" }, "occurrence_count":169, "first_occurrence":20713690 } , "95656-21790525": { "datetime_modified":"20220718T063028", "datetime_start":"20220810T120000", "datetime_end":"20220810T130000", "has_end_time":1, "date_start":"2022-08-10", "date_end":"2022-08-10", "time_start":"12:00:00", "time_end":"13:00:00", "time_zone":"America\/Detroit", "event_title":"Senior Leader for Analyst (Event Title TBD) (Small Group)", "occurrence_title":"", "combined_title":"Senior Leader for Analyst (Event Title TBD) (Small Group)", "event_subtitle":"", "event_type":"Careers \/ Jobs", "event_type_id":"2", "description":"\"Capital One is excited to connect with students looking for arole where they can develop innovative solutions to meet customers\u2019 needs and positively impact their lives. We invite you to register for a small group chat on July 19th to hear from a Senior Leader for Analysts.\n\nThis small group chat is a great opportunity to ask questions about our techprograms. You can also learn more about #LifeatCapitalOne, our culture,project areas, and more!", "occurrence_notes":null, "guid":"95656-21790525@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/95656", "building_id":"", "building_name":"", "campus_maps_id":"", "room":"", "location_name":"", "has_livestream":0, "cost":"", "tags":[], "website":"", "sponsors":[ { "group_name":"University Career Center UCC", "group_id":"1140", "website":"http:\/\/careercenter.umich.edu" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21790525 } , "95986-21791567": { "datetime_modified":"20260210T142109", "datetime_start":"20220810T123000", "datetime_end":"20220810T131500", "has_end_time":1, "date_start":"2022-08-10", "date_end":"2022-08-10", "time_start":"12:30:00", "time_end":"13:15:00", "time_zone":"America\/Detroit", "event_title":"Expedition Reef", "occurrence_title":"", "combined_title":"Expedition Reef", "event_subtitle":"", "event_type":"Presentation", "event_type_id":"16", "description":"Learn the secrets of the \u201crainforests of the sea\u201d as you embark on an oceanic safari of the world\u2019s most vibrant\u2014and endangered\u2014marine ecosystems. Expedition Reef immerses you in an undersea adventure. Along the way, discover how corals grow, feed, reproduce, and support over 25% of all marine life on Earth.\r\n\r\nThe state-of-the-art Planetarium & Dome Theater at the U-M Museum of Natural History transports visitors beyond distant stars and back in time from the comfort of reclining seats. Tickets $8. Tickets are available on the day of the show at the Museum Store.", "occurrence_notes":null, "guid":"95986-21791567@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/95986", "building_id":"1005169", "building_name":"Museum of Natural History", "campus_maps_id":"646", "room":"", "location_name":"Museum of Natural History", "has_livestream":0, "cost":"", "tags":["Natural Sciences","natural history museum"], "website":"", "sponsors":[ { "group_name":"Planetarium & Dome Theater at the Museum of Natural History", "group_id":"3825", "website":"" } ], "image_url":"https:\/\/events.umich.edu\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "styled_images":{ "event_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_thumb\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "event_large":"https:\/\/events.umich.edu\/media\/cache\/event_large\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "event_large_2x":"https:\/\/events.umich.edu\/media\/cache\/event_large_2x\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "event_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/event_large_lightbox\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "group_thumb":"https:\/\/events.umich.edu\/media\/cache\/group_thumb\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "group_thumb_square":"https:\/\/events.umich.edu\/media\/cache\/group_thumb_square\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "group_large":"https:\/\/events.umich.edu\/media\/cache\/group_large\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "group_large_lightbox":"https:\/\/events.umich.edu\/media\/cache\/group_large_lightbox\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "event_large_crop":"https:\/\/events.umich.edu\/media\/cache\/event_large_crop\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "event_list":"https:\/\/events.umich.edu\/media\/cache\/event_list\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "event_list_2x":"https:\/\/events.umich.edu\/media\/cache\/event_list_2x\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "event_grid":"https:\/\/events.umich.edu\/media\/cache\/event_grid\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "event_grid_2x":"https:\/\/events.umich.edu\/media\/cache\/event_grid_2x\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "event_feature_large":"https:\/\/events.umich.edu\/media\/cache\/event_feature_large\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg", "event_feature_thumb":"https:\/\/events.umich.edu\/media\/cache\/event_feature_thumb\/media\/attachments\/2022\/07\/event_95986_original-1.jpeg" }, "occurrence_count":84, "first_occurrence":21791558 } , "96529-21792624": { "datetime_modified":"20220805T080745", "datetime_start":"20220810T130000", "datetime_end":"20220810T150000", "has_end_time":1, "date_start":"2022-08-10", "date_end":"2022-08-10", "time_start":"13:00:00", "time_end":"15:00:00", "time_zone":"America\/Detroit", "event_title":"Feedback Control of Highly Dynamic 3D Bipedal Locomotion", "occurrence_title":"", "combined_title":"Feedback Control of Highly Dynamic 3D Bipedal Locomotion: Robotics PhD Defense, Yukai Gong", "event_subtitle":"Robotics PhD Defense, Yukai Gong", "event_type":"Lecture \/ Discussion", "event_type_id":"13", "description":"Chair: Jessy Grizzle\r\n\r\nAbstract:\r\nBipedal robots have the potential to free humans from tedious or dangerous tasks. Compared to robots in other forms, a bipedal robot has similar morphology to humans and thus can work in almost all spaces where humans work and requires little to none facility modifications. However, while many other robots are deployed in real life and are beginning to have an impact, bipedal robots are hardly seen outside of labs due to stability issues. Bipeds are inherently unstable due to their morphology. A bipedal system is nonlinear, high dimensional, hybrid, and underactuated, which poses great challenges to controller design. This thesis will therefore focus on developing control methods for biped locomotion. \r\n\r\nFirst, we discuss a controller for a Cassie Robot designed with gait-library methods. The full 20 DoF dynamic model of Cassie and optimization are used to design seven gaits for walking in place, forward, and backward, while meeting key physical constraints. Moreover, we show how to practically implement these gaits on the robot. \r\n\r\nNext, we focus on studying the dynamics of bipedal robots. We established connections between various approximate pendulum models that are commonly used for heuristic controller design and those that are more common in the feedback control literature where formal stability guarantees are the norm. We clarify commonalities and differences in the two perspectives for using low-dimensional models. In the process of doing so, we argue that models based on angular momentum about the contact point provide more accurate representations of robot state than models based on linear velocity. Specifically, we show that an approximate (pendulum or zero dynamics) model parameterized by angular momentum provides better predictions for a physical robot (e.g., legs with mass) than does a related approximate model parameterized in terms of linear velocity. We call the pendulum model parameterized by angular momentum ALIP.\r\n\r\nFinally, we discuss general mechanisms in bipedal balance, explain why foot placement is the most effective method, and select it as our major method to stabilize a bipedal gait. We focus on regulating angular momentum about the contact point with the ALIP model. We implement a one-step-ahead angular-momentum-based walking controller on Cassie, a 3D robot, and demonstrate high agility and robustness in experiments. 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This presentation includes how to find the cardinal directions on your own by finding the North Star, current and upcoming constellations, visible planets, a few deep sky objects depending on the season, and other interesting astronomical visualizations. If you want to be able to look up from your own backyard and know what to look for, this is the show for you.\r\n\r\nThe state-of-the-art Planetarium & Dome Theater at the U-M Museum of Natural History transports visitors beyond distant stars and back in time from the comfort of reclining seats. Tickets $8. 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Salem-Keizer School District Summer Job Fair", "occurrence_title":"", "combined_title":"Hiring Day! Salem-Keizer School District Summer Job Fair", "event_subtitle":"", "event_type":"Careers \/ Jobs", "event_type_id":"2", "description":"We are hiring! Join us for our Summer Job Fair this Wednesday evening at the Lancaster Professional Center. \n\nWe are excited to meet you & share more about our jobs with immediate openings. We are hiring for a variety of full time & part time positions. We will be here in-person to: \n- Introduce you to Hiring Managers \n- Help you complete your application\n- Conduct possible same-day interviews\n\n*Note: We have a hiring focus for our Instructional Assistant \/ Teacher Assistant role, in which youwill work closely with students to improve their achievement. You help build a lively, safe, healthy environment for students by assisting licensed teachers in the classroom! (You can find this job posted to our Handshake account).\n\nFeel free to pass this invitation along to someone you know & we look forward to meeting!", "occurrence_notes":null, "guid":"96681-21793044@events.umich.edu", "permalink":"http:\/\/events.umich.edu\/event\/96681", "building_id":"", "building_name":"", "campus_maps_id":"", "room":"", "location_name":"2450 Lancaster Drive Northeast, Salem, Oregon 97305, United States", "has_livestream":0, "cost":"", "tags":[], "website":"", "sponsors":[ { "group_name":"University Career Center UCC", "group_id":"1140", "website":"http:\/\/careercenter.umich.edu" } ], "image_url":"", "styled_images":{ "event_thumb":"", "event_large":"", "event_large_2x":"", "event_large_lightbox":"", "group_thumb":"", "group_thumb_square":"", "group_large":"", "group_large_lightbox":"", "event_large_crop":"", "event_list":"", "event_list_2x":"", "event_grid":"", "event_grid_2x":"", "event_feature_large":"", "event_feature_thumb":"" }, "occurrence_count":1, "first_occurrence":21793044 } }