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8 mins
MIT Faculty Shorts

Alan Grodzinsky

Short and Long Term Cartilage Repairs

Alan Grodzinsky
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42 mins
ILP Video

TRANSFORM: Beyond Pixels, Towards Radical Atoms (English)

Hiroshi Ishii
Jerome B. Wiesner Professor of Media Arts and Sciences
Associate Director of MIT Media Laboratory
Director of Tangible Media Group
MIT Media Lab
Whereas today's mainstream Human Computer Interaction (HCI) research addresses functional concerns – the needs of users, practical applications, and usability evaluation – Tangible Bits and Radical Atoms are driven by vision. This is because today's technologies will become obsolete in one year, and today's applications will be replaced in 10 years, but true visions – we believe – can last longer than 100 years.

Tangible Bits seeks to realize seamless interfaces between humans, digital information, and the physical environment by giving physical form to digital information, making bits directly manipulable and perceptible. Our goal is to invent new design media for artistic expression as well as for scientific analysis, taking advantage of the richness of human senses and skills – as developed through our lifetime of interaction with the physical world.

Radical Atoms takes a leap beyond Tangible Bits by assuming a hypothetical generation of materials that can change form and properties dynamically, becoming as reconfigurable as pixels on a screen. Radical Atoms is the future material that can transform its’ shape, conform to constraints, and inform the users of their affordances. Radical Atoms is a vision for the future of human-material interaction, in which all digital information has a physical manifestation so that we can interact directly with it.

I will present the trajectory of our vision-driven design research from Tangible Bits towards Radical Atoms, and a variety of interaction design projects that were presented and exhibited in Arts, Design, and Science communities.
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36 mins
ILP Video

Extremely cost-effective semiconductor layer-transfer process via graphene & Highly uniform advanced RRAM (English)

Jeehwan Kim
Class of 1947 Career Development Assistant Professor of Mechanical Engineering
MIT Department of Mechanical Engineering
As a strategy to save the cost of expensive substrates in semiconductor processing, the technique called “layer-transfer” has been developed. In order to achieve real cost-reduction via the “layer-transfer”, the following needs to be insured: (1) Reusability of the expensive substrate, (2) Minimal substrate refurbishment step after the layer release, (3) Fast release rate, and (4) Precise control of a released interface. Although a number of layer transfer methods have been developed including chemical lift-off, optical lift-off, and mechanical lift-off, none of those three methods fully satisfies conditions listed above. In this talk, we will discuss our recent development in a “graphene-based layer-transfer” process that could fully satisfy the above requirements, where epitaxial graphene can serve as a universal seed layer to grow single-crystalline GaN, III-V, II-VI and IV semiconductor films and a release layer that allows precise and repeatable release at the graphene surface. We will further discuss about cost-effective, defect-free heterointergration of semiconductors using graphene-based layer transfers.

Lastly, I will introduce our new research activities in developing advanced RRAM devices. Resistive switching devices have attracted tremendous attention due to their high endurance, sub-nanosecond switching, long retention, scalability, low power consumption, and CMOS compatibility. RRAMs have also emerged as a promising candidate for non-Von Neumann computing architectures based on neuromorphic and machine learning systems to deal with “big data” problems such as pattern recognition from large amounts of data sets. However, currently reported RRAM devices have not shown uniform switching behaviors across the devices with high on-off ratio which holds up commercialization of RRAM-based data storages as well as demonstration of large-scale neuromorphic functions. Recently, we redesigned RRAM devices and this new device structure exhibits most of functions required for large-array memories and neuromorphic computing, which are (1) excellent retention with high endurance, (2) excellent device uniformity, (3) high on/off current ratio, and (4) current suppression in low voltage regime. I will discuss about the characterization results of this new RRAM device.
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32 mins
ILP Video

MIT Startup Introductions (English)

Coventry Associates - Holosonics - TagUp - Yaxa - Poly6 - Diamond Nanotechnologies - Akselos
Startup: Coventry Associates - Holosonics - TagUp - Yaxa - Poly6 - Diamond Nanotechnologies - Akselos
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42 mins
ILP Video

Bioinspired Hydrogel Scaffolds, Electronics and Machines (English)

Xuanhe Zhao
Robert N Noyce Career Development Associate Professor of Mechanical Engineering
Associate Professor of Civil and Environmental Engineering
Head, Soft Active Materials Laboratory (SAMs)
MIT Department of Mechanical Engineering
While human tissues are mostly soft, wet and bioactive; machines are commonly hard, dry and biologically inert. Bridging human-machine interfaces is of imminent importance in addressing grand challenges in health, security, sustainability and joy of living facing our society in the 21st century. However, designing human-machine interfaces is extremely challenging, due to the fundamentally contradictory properties of human and machine. At MIT SAMs Lab, we propose to use tough bioactive hydrogels to bridge human-machine interfaces. On one side, bioactive hydrogels with similar physiological properties as tissues can naturally integrate with human body, playing functions such as scaffolds, catheters, drug reservoirs, and wearable devices. On the other side, the hydrogels embedded with electronic and mechanical components can control and response to external devices and signals. In the talk, I will first present a bioinspired approach and a general framework to design bioactive and robust hydrogels as the matrices for human-machine interfaces. I will then discuss large-scale manufacturing strategies to fabricate robust and bioactive hydrogels and hydrogel electronics and machines, including 3D printing. Prototypes including smart hydrogel band-aids, hydrogel robots and hydrogel circuits will be further demonstrated.
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