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Tritium retention in nuclear graphite, system-level transport, and management strategies for the fluoride-salt-cooled high-temperature reactor
(Massachusetts Institute of Technology, 2021)
Advanced reactor concepts which use a lithium- or beryllium-bearing primary salt coolant will require technical solutions to mitigate the environmental release of tritium. One such design is the Fluoride-Salt-Cooled ...
Essays on physician innovation and practice style in healthcare markets
(Massachusetts Institute of Technology, 2021)
This thesis consists of three chapters on technological innovation, diffusion, and practice style among physicians. The first chapter investigates the effect of age on a surgeon's propensity to use new medical procedures. ...
Structural design and proof of hierarchical cache-coherence protocols
(Massachusetts Institute of Technology, 2021)
Cache-coherence protocols have been one of the greatest correctness challenges of the hardware world. A memory subsystem usually consists of several caches and the main memory, and a cache-coherence protocol defined in ...
Hierarchical abstractions for model-based visual navigation
(Massachusetts Institute of Technology, 2021)
In this thesis, we explore hierarchical map representations that improve autonomous vision-based navigation. Challenged with the task of navigating in an unknown environment, an autonomous agent must perceive the environment ...
Performance Engineering of Proof-Based Software Systems at scale
(Massachusetts Institute of Technology, 2021)
Formal verification is increasingly valuable as our world comes to rely more on software for critical infrastructure. A significant and understudied cost of developing mechanized proofs, especially at scale, is the computer ...
High-resolution tactile sensing for reactive robotic manipulation
(Massachusetts Institute of Technology, 2021)
This thesis explores tactile sensing to enable reactive behavior in robotic manipulation. More specifically, we focus on developing high-resolution vision-based tactile sensing hardware, perceptual algorithms, and controller ...
Deeper learning at scale with roleplaying systems
(Massachusetts Institute of Technology, 2021)
Contemporary online learning systems are increasingly important and common elements of post-secondary, workplace, and lifelong education. The current state is that these systems typically employ the banking model of education ...
Large-scale integrated quantum photonics with artificial atoms
(Massachusetts Institute of Technology, 2021)
The construction of large, controllable quantum systems is a formidable task in quantum science and technology. In the context of quantum networks, single emitters in diamond have emerged as leading quantum bits that combine ...
Graphene-metal interactions beyond Van der Waals forces
(Massachusetts Institute of Technology, 2021)
With extraordinary properties, graphene has been applied in various studies to explore new phenomena, new understandings, and new applications. With only one atomic layer thick and all its atoms are on the surface, graphene's ...
A small, bright silicon light-emitting diode directly integrated with microelectronics
(Massachusetts Institute of Technology, 2021)
Silicon technologies have been developed for both electronics and photonics. Future demands call for further innovation in each field separately, but also depend on our ability to bring the best of both worlds together ...