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    • Fall 2024 GRASP SFI: Noémie Jaquier, Karlsruhe Institute of Technology, “The geometric side(s) of Lagrangian dynamics”

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    Levine 307 3330 Walnut Street, Philadelphia, PA, United States

    This will be a hybrid event with in-person attendance in Levine 307 and virtual attendance on Zoom. This week's speaker will be virtual.  ABSTRACT Lagrangian mechanics provides a powerful framework for modeling the dynamics of physical systems by inferring their motions based on energy conservation. This talk will explore recent advances in applying geometric perspectives, […]

    ESE Guest Seminar – “Coherent Control of Electromagnetic Waves via Tunable Chaotic Cavities”

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    Towne 337

    The theory of Coherent Perfect Absorption1 (time-reversed lasing) and Reflectionless Scattering Modes2 has shown that there always exist discrete solutions to scattering of electromagnetic waves in multiple-scattering geometries that achieve perfect transduction or perfect (reflectionless) impedance matching. In general these are transient (complex frequency) solutions, but, typically, with tuning of a one system parameter it […]

    MSE Seminar: “Luminescent Photonic Metamaterials and Devices From THz to Optical Frequencies”

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    Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

    A crucial yet unavailable component in high-performance photonic integrated circuits (ICs) and other chip-scale photonic systems is an on-chip light source that is efficient, functional, IC-compatible, and electronically addressable. In this talk, I will cover several types of on-chip sources, including perovskite microlasers and luminescent hyperbolic metamaterials, topologically protected microlasers on the III-V platform, as […]

    Fall 2024 GRASP Seminar: James Bern, Williams College, “Mixed Reality Soft Robots and Accessible CAD Software”

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    Levine 307 3330 Walnut Street, Philadelphia, PA, United States

    *This seminar will be held in-person in Levine 307 as well as virtually via Zoom. This seminar will NOT be recorded. ABSTRACT This talk has two parts. First, I will explain our recent work on making it easier to control 3D soft robots. By extending our prior work on soft robot inverse kinematics (Soft IK) into […]

    Fall 2024 GRASP on Robotics: Damion Shelton, Agility Robotics, “What do we want from our machines?”

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    Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

    This will be a hybrid event with in-person attendance in Wu and Chen and virtual attendance on Zoom. ABSTRACT In 2022 I represented Agility Robotics at the first “Philadelphia Summit” on the weaponization of autonomous robots, co-hosted by the GRASP lab and Boston Dynamics. By late fall, this yielded a joint statement, signed by Agility, […]

    ESE 2024 Jack Keil Wolf Lecture – “Army of Ants: The Power of Working in Concert”

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    Glandt Forum, Singh Center for Nanotechnology 3205 Walnut Street, Philadelphia, PA, United States

    Synchronized operation of a large number of similar entities can generate behavior that cannot be expected from single one. This principle combined with the physical concept of coherence in waves enables creation of programmable 3-dimensional focal points that can be used to enable many applications such as wireless energy transfer at distance on earth and […]

    Fall 2024 GRASP Seminar: Yunzhu Li, Columbia University, “Foundation Models for Robotic Manipulation: Opportunities and Challenges”

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    Levine 307 3330 Walnut Street, Philadelphia, PA, United States

    *This seminar will be held in-person in Levine 307 as well as virtually via Zoom. ABSTRACT Foundation models, such as GPT-4 Vision, have marked significant achievements in the fields of natural language and vision, demonstrating exceptional abilities to adapt to new tasks and scenarios. However, physical interaction—such as cooking, cleaning, or caregiving—remains a frontier where foundation […]

    ESE Ph.D. Thesis Defense: “Learning-based Model Predictive Control for Aerial Vehicles”

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    Levine 307 3330 Walnut Street, Philadelphia, PA, United States

    Learning-based model predictive control (MPC) is an increasingly prominent control paradigm in recent years. One primary approach in learning-based MPC is to leverage machine or deep learning tools to construct accurate dynamics models. These models are then deployed into optimization-based control schemes. Although these frameworks can potentially provide significant performance improvements, a number of key […]

    MEAM Seminar: “Can Materials From the 1930’s Really Revolutionize Battery Manufacturing?”

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    Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

    Fluorinated polymers offer a plethora of unique and sometimes perplexing properties. One of the most interesting is the ability for specific types of polytetrafluoroethylene (PTFE) to undergo room-temperature, sheer-induced, structural transformations leading “unwinding” of crystallites and the formation of nano-scale fibers. This process is commonly referred to as “fibrillation”. The material properties required for this […]

    ESE Fall Seminar – “Non-Parametric Analysis of Dynamical Systems: From Recurrent Sets to Generalized Lyapunov and Barrier Conditions”

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    Raisler Lounge (Room 225), Towne Building 220 South 33rd Street, Philadelphia, PA, United States

    This talk presents novel non-parametric methods for analyzing dynamical systems using solely trajectory data. Our critical insight is to replace the notion of invariance, a core concept in Lyapunov Theory, with the more relaxed condition of recurrence. Specifically, a set is τ-recurrent if every trajectory that starts within the set returns to it after at […]

    CIS Seminar: ” Just Infrastructures”

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    Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

    Sociotechnical systems enable large-scale connection and the dissemination of timely, engaging information. However, these systems are shaped by complex, often invisible governance structures—comprising rules, roles, and relationships—that significantly influence how they operate. Gaining even a basic understanding of these governance structures is key to using them more effectively and deliberately. Yet, many of the millions […]