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X-ORIGINAL-URL:https://seasevents.nmsdev7.com
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DTSTART:20180311T070000
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190806T103000
DTEND;TZID=America/New_York:20190806T120000
DTSTAMP:20260408T131732
CREATED:20190722T132446Z
LAST-MODIFIED:20190722T132446Z
UID:10006241-1565087400-1565092800@seasevents.nmsdev7.com
SUMMARY:MEAM Seminar: "From Elder Care Service Robots to the Design of Low-Cost End-Effectors and Novel Manipulation Techniques"
DESCRIPTION:Older adults are forming a much larger percentage of the population leading to a strain in the healthcare sector. It is expected that the population aged 65 and over in the United States alone will double in the next 30 years\, and similarly worldwide. Despite abundance of the facilities to accommodate the growing older adult population\, there is a shortage of caregivers to staff these facilities. With the scarcity of care options available\, low-cost robots may be a creative and vastly accessible solution for simple mobile and manipulation tasks that would normally be handled by a caregiver. \nThis work proposes an investigation on both behavioral and technical aspects of human robot interaction in elder care settings\, in view of a low-cost platform capable of executing desired tasks. The behavioral investigation combines a qualitative study with focus groups and surveys from not only the elders’ standpoint\, but also from the standpoint of healthcare professionals to investigate suitable tasks to be accomplished by a service robot in such environment. Through multiple deployments of the robot at actual elder care facilities (such as at a low-income Supportive Apartment Living\, SAL) and interaction with older adults\, design guidelines are developed to improve on both interaction and usability aspects. The technical investigation proposes novel manipulation techniques and end-effector design focusing on minimizing hardware usage and cost\, in addition to comply with safety constraints imposed by elder care facilities. Object picking through in-hand manipulation using custom-made end-effectors with no internal mobility (or zero degrees-of-freedom\, DOF) is proposed. The resulting operation incorporates tipping and regrasping as in-hand manipulation operations. The lack of mobility is advantageous as no active forces can be applied directly to the object by the end-effector\, and so the manipulated item be safely placed or removed by humans interacting with the robot\, a desirable feature for manipulation tasks especially in elder care settings.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-from-elder-care-service-robots-to-the-design-of-low-cost-end-effectors-and-novel-manipulation-techniques/
LOCATION:Room 337\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190807T130000
DTEND;TZID=America/New_York:20190807T150000
DTSTAMP:20260408T131732
CREATED:20190805T190801Z
LAST-MODIFIED:20190805T190801Z
UID:10006255-1565182800-1565190000@seasevents.nmsdev7.com
SUMMARY:BE Doctoral Dissertation Defense: "Informing Neuromodulation Therapies with a Control-Theory Approach to Brain Network Plasticity"
DESCRIPTION:The Department of Bioengineering at the University of Pennsylvania and Dr. Dani Bassett are pleased to announce the Doctoral Dissertation Defense of Andrew Murphy. \nThe public is welcome to attend.
URL:https://seasevents.nmsdev7.com/event/doctoral-be-dissertation-defense-informing-neuromodulation-therapies-with-a-control-theory-approach-to-brain-network-plasticity/
LOCATION:Raisler Lounge (Room 225)\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Doctoral,Student,Dissertation or Thesis Defense
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190808T120000
DTEND;TZID=America/New_York:20190808T140000
DTSTAMP:20260408T131732
CREATED:20190722T172656Z
LAST-MODIFIED:20190722T172656Z
UID:10006242-1565265600-1565272800@seasevents.nmsdev7.com
SUMMARY:BE Doctoral Dissertation Defense: "Multi-scale Brain Responses in the Development of Persistent Osteoarthritic Temporomandibular Pain"
DESCRIPTION:The Department of Bioengineering at the University of Pennsylvania and Drs. Eric Granquist and Beth Winkelstein are pleased to announce the Doctoral Dissertation Defense of Megan Sperry. The public is welcome to attend.
URL:https://seasevents.nmsdev7.com/event/be-doctoral-dissertation-defense-multi-scale-brain-responses-in-the-development-of-persistent-osteoarthritic-temporomandibular-pain/
LOCATION:Room 337\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Doctoral,Student,Dissertation or Thesis Defense
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190813T103000
DTEND;TZID=America/New_York:20190813T120000
DTSTAMP:20260408T131732
CREATED:20190808T140550Z
LAST-MODIFIED:20190808T140550Z
UID:10006263-1565692200-1565697600@seasevents.nmsdev7.com
SUMMARY:MEAM Seminar: "Mechanical Models for DNA"
DESCRIPTION:We will discuss two complementary mechanical models for DNA that deal with\, respectively two problems: one\, phase transitions in a DNA molecule\, and two\, allosteric interactions between two ligands bound to DNA. \nExperimental studies on single molecules of DNA have reported a rich variety of cooperative structural transitions\, including coexistence of three phases\, when a torsionally constrained DNA molecule is pulled using magnetic or optical tweezers. Our objective is to examine the aforementioned structural transitions using ideas from statistical mechanics and the theory of elasticity. We use foundational concepts from the Zimm-Bragg helix-coil transition theory and merge them with ideas from the theory of fluctuating elastic rods to model the mechanics of DNA. Furthermore\, we use Poisson-Boltzmann to account for the electrostatic interactions between the ions and the negatively charged phosphate backbone of DNA. Using our model\, we calculate the force and torque corresponding to the over-stretching transition characterized by a 70% jump in the contour length of the molecule and examine the effect of salt concentration on this transition. \nIn the next part\, we present a mechanical model for computing the allosteric interaction energy between two ligands on DNA. This interaction is quantified by measuring the change in free energy as a function of the distance between the binding sites for two ligands. We show that trends in the interaction energy of two ligands binding to DNA can be explained using an elastic birod model which accounts for the elastic deformation of strands and base-pairs as well as the change in stacking energy due to perturbations in position and orientation of the bases caused by the binding of ligands. The strain fields produced by the ligands decay with distance from the binding site. The interaction energy of two ligands decays exponentially with the distance between them and oscillates with the periodicity of the double helix in quantitative agreement with experimental measurements. The trend in the computed interaction energy is similar to that in the perturbation of groove width produced by the binding of a single ligand which is consistent with molecular simulations. Our analysis provides a new framework to understand allosteric interactions in DNA and can be extended to other rod-like macromolecules whose elasticity plays a role in biological functions. \nThe results from our model are in agreement with multiple experiments documented in the literature and they generate new falsifiable predictions that can be experimentally tested.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-mechanical-models-for-dna/
LOCATION:Room 337\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190814T100000
DTEND;TZID=America/New_York:20190814T120000
DTSTAMP:20260408T131732
CREATED:20190730T155059Z
LAST-MODIFIED:20190730T155059Z
UID:10006253-1565776800-1565784000@seasevents.nmsdev7.com
SUMMARY:MEAM Doctoral Dissertation Defense: "Additive Manufacturing and Mechanical Properties of Cellulose Nanofibril Materials"
DESCRIPTION:Cellulose nanofibrils (CNFs) are a nanomaterial derived from plants that have high specific stiffness and strength\, can be made into optically transparent materials\, and are biodegradable. These properties make CNFs an attractive building block for bulk structural materials. However\, CNFs are typically produced in aqueous suspension at low CNF weight fractions (<1 wt.%)\, which makes manufacturing bulk CNF materials challenging due to long processing times and the development of significant residual stresses during drying. As a result\, applications of CNFs in structural materials are currently limited to thin films and their use as low concentration reinforcement in composite materials. The objective of this dissertation is to overcome current limitations in building neat CNF materials by using additive manufacturing approaches to print films from aqueous CNF solutions with controlled fiber orientation and to build bulk structures with mm-scale thicknesses and enhanced mechanical properties. \nThis dissertation reports the use of two additive manufacturing techniques\, direct ink writing and laminated object manufacturing\, to fabricate neat CNF thin films with controlled orientation and materials with millimeter-scale dimensions\, respectively. The orientation of the CNFs in the printed films and the mechanical properties of the films and laminated CNF materials were experimentally characterized. Orientation in the printed CNF films was found to be controlled by the drying mechanics\, and a correlation between orientation and stiffness was observed. The multi-ply CNF films and laminated bulk beams with thicknesses of up to 0.6 mm were found to have comparable stiffness and strength and increased toughness compared to single-layer CNF films. Key contributions of this dissertation include the development of a printing process to decrease the time to fabricate CNF films\, a demonstration and a mechanics-based understanding of the control of fiber orientation in printed CNF materials\, and a new process to realize bulk neat CNF materials with increased thickness and enhanced toughness.
URL:https://seasevents.nmsdev7.com/event/meam-doctoral-dissertation-defense-additive-manufacturing-and-mechanical-properties-of-cellulose-nanofibril-materials/
LOCATION:Room 337\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190815T103000
DTEND;TZID=America/New_York:20190815T120000
DTSTAMP:20260408T131732
CREATED:20190801T194536Z
LAST-MODIFIED:20190801T194536Z
UID:10006254-1565865000-1565870400@seasevents.nmsdev7.com
SUMMARY:MEAM Seminar: “Delivering Expressive and Personalized Fingertip Haptic Cues”
DESCRIPTION:The importance of meaningful tactile experiences has become increasingly apparent in areas such as teleoperation\, education\, and gaming. As the applications of rendering haptic stimuli are growing\, so are the requirements of haptic interfaces\, in that the intended audience is becoming more diverse and the intended interactions are becoming more complicated. For the past few decades there has been a consistent effort to improve the range and realism of haptic cues\, yet typical haptic rendering continues to be one-size-fits-all and low-dimensional. To render increasingly realistic haptic cues\, we must focus on both expressiveness and personalization. \nIn this talk I will present work towards delivering more expressive and personalized fingertip haptic cues from the perspective of both mechanical design and rendering approach. I will first present the Fuppeteer\, a parallel continuum manipulator that can move a flat surface around the fingertip with six degrees of freedom. This wearable device can provide combinations of normal and shear forces across the user’s entire fingertip\, regardless of finger shape and size. We have evaluated system performance through force measurements and through a human-subject study. This talk will also feature ongoing development of algorithms for delivering personalized sensed cues\, independent of the specific haptic device and remote sensor used. I will discuss both geometric and data-driven approaches\, and I will provide preliminary measurements of the rendering error generated by each method.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-delivering-expressive-and-personalized-fingertip-haptic-cues/
LOCATION:Room 337\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190816T100000
DTEND;TZID=America/New_York:20190816T113000
DTSTAMP:20260408T131732
CREATED:20190529T133703Z
LAST-MODIFIED:20190529T133703Z
UID:10006228-1565949600-1565955000@seasevents.nmsdev7.com
SUMMARY:CBE Doctoral Dissertation Defense: "Utilization of MEMS Techniques for the Fabrication of Scalable Energy Storage Devices"
DESCRIPTION:Committee Members: Sue Ann Bidstrup Allen\, Advisor; Raymond Gorte\, John Vohs and Mark Allen.
URL:https://seasevents.nmsdev7.com/event/cbe-doctoral-dissertation-defense-utilization-of-mems-techniques-for-the-fabrication-of-scalable-energy-storage-devices/
LOCATION:Glandt Forum\, Singh Center for Nanotechnology\, 3205 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Doctoral,Student,Dissertation or Thesis Defense
ORGANIZER;CN="Chemical and Biomolecular Engineering":MAILTO:cbemail@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190816T100000
DTEND;TZID=America/New_York:20190816T120000
DTSTAMP:20260408T131732
CREATED:20190722T204450Z
LAST-MODIFIED:20190722T204450Z
UID:10006243-1565949600-1565956800@seasevents.nmsdev7.com
SUMMARY:CBE Doctoral Thesis Defense: "Utilization of Mems Techniques for the Fabrication of Scalable Energy Storage Devices"
DESCRIPTION:Committee: Sue Ann Bidstrup Allen\, Advisor; Raymond Gorte\, John Vohs and Mark Allen
URL:https://seasevents.nmsdev7.com/event/cbe-doctoral-thesis-defense-utilization-of-mems-techniques-for-the-fabrication-of-scalable-energy-storage-devices/
LOCATION:Glandt Forum\, Singh Center for Nanotechnology\, 3205 Walnut Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Doctoral,Student,Dissertation or Thesis Defense
ORGANIZER;CN="Chemical and Biomolecular Engineering":MAILTO:cbemail@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190820T103000
DTEND;TZID=America/New_York:20190820T120000
DTSTAMP:20260408T131732
CREATED:20190806T184018Z
LAST-MODIFIED:20190806T184018Z
UID:10006262-1566297000-1566302400@seasevents.nmsdev7.com
SUMMARY:MEAM Seminar: "Nano-compatible Neuromorphic Computers: An All-passive Approach to Neural Networks"
DESCRIPTION:This era of the internet of things is poised to experience explosive growth in the number of interconnected smart electronic devices. Machine learning algorithms\, such as neural networks\, are expected to play an indispensable role in analyzing the data gathered by these devices\, and in many cases\, will also facilitate informed device responses. However\, the prospect of connecting a billion devices to the cloud and implementing large-scale neural networks remotely is infeasible for applications such as autonomous driving\, implantable medical devices\, and robotic platforms\, that need the information to be processed speedily\, at a small power budget. To deliver these requirements\, it becomes necessary to equip devices with hardware that is optimized for neural network computations. For nanoscale implementations of such “neuromorphic” computers\, it is important to develop simple designs of constituent circuits so that the required architectural complexity can be achieved within the nanofabrication constraints. \nCurrent “neuromorphic” hardware designs typically utilize active circuits\, comprising of three-terminal devices\, to implement artificial neurons\, an approach that is not suitable for compact nanoscale implementations. In this talk\, we will show\, how all-passive circuits for artificial neurons\, comprising of two-terminal devices only\, can instead address these drawbacks effectively. We will introduce simple circuit representations of artificial synapses and discuss how these enable improved memory-efficiencies vis – a – vis contemporary designs. By combining the passive neurons and synapses in network configurations\, we will demonstrate how all-passive neuromorphic computers can perform complex pattern recognition tasks\, such as identifying numerical digits from their images\, with accuracies greater than 95%. The classification accuracies\, power consumption and areal footprint of all – passive neuromorphic computers will be compared to those of the state – of – the – art technology. On the fabrication front\, we will introduce simple methods for realizing re-programmable and once-programmable artificial synapses and delve into their operational attributes. Simple electrochemical deposition techniques for fabricating neurons will also be presented. The results of this work will promote new approaches to the design and fabrication of integrated nanoscale neuromorphic computers.
URL:https://seasevents.nmsdev7.com/event/meam-seminar-nano-compatible-neuromorphic-computers-an-all-passive-approach-to-neural-networks/
LOCATION:Room 337\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190827T143000
DTEND;TZID=America/New_York:20190827T153000
DTSTAMP:20260408T131732
CREATED:20190820T190813Z
LAST-MODIFIED:20190820T190813Z
UID:10006266-1566916200-1566919800@seasevents.nmsdev7.com
SUMMARY:MEAM Seminar: "Small\, Autonomous\, Flying Robots that can Feel and Map their Environment"
DESCRIPTION:Autonomous flight through unknown environments in the presence of obstacles is a challenging problem for micro aerial vehicles (MAVs). A majority of the current state-of-art research focuses on modeling obstacles as opaque objects that can be easily sensed by optical sensors such as cameras or LiDARs. Since obstacles may not always be opaque\, particularly in indoor environments with glass walls and windows\, robots (like birds) have a difficult time navigating to the unknown environments. \nIn this thesis\, we describe the design\, modeling\, control and sensing for a new class of micro aerial vehicles that can navigate unknown environments and are robust to collisions. In particular\, we present the design of the Tiercel MAV: a small\, agile\, light weight\, collision-resistant robot powered by a cellphone grade CPU. The Tiercel is able to localize using a visual-inertial odometry (VIO) algorithm running on board the robot with a single downward facing wide angle camera. Next\, we characterize the effects of impacts and collisions on the visual-inertial odometry running on board the robot. We further develop the system architecture and components to enable the Tiercel to fly autonomously in an unknown space\, detect collisions using its on board IMU\, and leverage that information to build a 2D map of the environment. Finally\, we demonstrate the capability of a swarm of three Tiercel robots to navigate autonomously through an unknown\, obstacle ridden space while sustaining collisions with the environment. Finally\, our approach exploits contact to infer the presence of transparent or reflective obstacles like glass walls\, allowing us to naturally integrate touch with visual perception for SLAM.
URL:https://seasevents.nmsdev7.com/event/meam-summer-seminar-small-autonomous-flying-robots-that-can-feel-and-map-their-environment/
LOCATION:Room 307\, Levine Hall\, 3330 Walnut Street\, Philadelphia\, PA\, 19104\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190830T140000
DTEND;TZID=America/New_York:20190830T160000
DTSTAMP:20260408T131732
CREATED:20190823T181025Z
LAST-MODIFIED:20190823T181025Z
UID:10006270-1567173600-1567180800@seasevents.nmsdev7.com
SUMMARY:CBE Doctoral Dissertation Defense: "Anisotropy and Aggregation in Self-Assembled Polymer Nanocomposites"
DESCRIPTION:Committee: Robert Riggleman\, PhD (co-advisor); Russell Composto\, PhD (co-advisor); Ravi Radhakrishan\, PhD; and Jeff Meth\, PhD
URL:https://seasevents.nmsdev7.com/event/cbe-doctoral-dissertation-defense-anisotropy-and-aggregation-in-self-assembled-polymer-nanocomposites/
LOCATION:Room 337\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Chemical and Biomolecular Engineering":MAILTO:cbemail@seas.upenn.edu
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20190830T153000
DTEND;TZID=America/New_York:20190830T163000
DTSTAMP:20260408T131732
CREATED:20190814T140342Z
LAST-MODIFIED:20190814T140342Z
UID:10006264-1567179000-1567182600@seasevents.nmsdev7.com
SUMMARY:MEAM/LRSM Seminar: "Enabling Soft\, Flexible 2D Materials and Sensors"
DESCRIPTION:Low temperature synthesis of high quality 2D materials directly on flexible substrates remains a fundamental limitation towards realization of robust\, strainable electronics possessing the unique physical properties of atomically thin structures. Here\, we describe room temperature synthesis of uniform\, stoichiometric amorphous MoS2\, WSe2\, and other transition metal dichalcogenides and subsequent large area (>5 cm2) photonic crystallization to enable direct fabrication of devices based on two-dimensional materials on large area flexible or rigid substrates. Fundamentals of crystallization kinetics for different monolithic and heterostructured TMDs are examined to apply this new synthesis approach for affordable\, wearable devices. Example devices include photodetectors with photocurrent output and response times comparable to those fabricated via CVD and exfoliated materials on rigid substrates and the performance is unaffected by strains exceeding 5%. Flexible molecular sensors fabricated in this way detect diverse vapor phase substances with sub-ppm sensitivity. Functionalization of laser-written 2D TMD sensor transducers is also demonstrated for healthcare applications. Devices and circuits directly written from photonically annealed monolithic TMDs thin films deposited on large area flexible substrates\, with no photolithography or patterning\, are also presented. Additionally\, other advanced processing strategies that enable flexible 2D materials will be discussed\, including h-BN van der Waals liftoff of GaN HEMT devices for future strainable RF devices.
URL:https://seasevents.nmsdev7.com/event/meam-lrsm-seminar-enabling-soft-flexible-2d-materials-and-sensors/
LOCATION:Reading Room\, LRSM\, 3231 Walnut Street\, Philadelphia\, PA\, 19104\, United States
ORGANIZER;CN="Mechanical Engineering and Applied Mechanics":MAILTO:meam@seas.upenn.edu
END:VEVENT
END:VCALENDAR