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Now showing items 51-60 of 124
A suction-based reversible attachment and locomotion mechanism for an underway vessel hull cleaning and inspection robot
(Massachusetts Institute of Technology, 2020)
The international merchant vessel fleet is in charge of carrying over 90% of the items that are traded globally. Any vessel down time brings significant additional costs to the industry. A common source of vessel downtime ...
System identification and control of a miniature external mechanical vibration device towards clinical ultrasound shear wave elastography
(Massachusetts Institute of Technology, 2020)
An acoustic radiation force (ARF) is commonly used to generate shear waves in ultrasound systems for shear wave elastography (SWE). However, ARF requires complex hardware that produces thermal stresses in tissues and ...
Exploring low-cost deep ocean sensing utilizing undersea cable networks
(Massachusetts Institute of Technology, 2020)
The ocean represents more than 99% of the Earth's biosphere, yet we only monitor less than 2% of it. Consequently, we lack a clear and persistent picture of currents, marine life migrations, carbon capture and acidity ...
Numerical tools for rate-cost-quality analysis of laser-based additive manufacturing
(Massachusetts Institute of Technology, 2020)
AM expands the design space in an unprecedented manner, as it can allow complex internal geometries, support multiple materials or structural gradients, significantly reduce lead times for small-batch production, and enable ...
Evaluation of automated storage and retrieval in a distribution center
(Massachusetts Institute of Technology, 2020)
In the face of e-commerce growth and rising customer delivery expectations, companies must adapt to meet shorter contract shipping requirements with existing infrastructures. The "Amazon effect", an evolution resulting in ...
Reducing variations in a highly constrained environment in order to increase production capacity
(Massachusetts Institute of Technology, 2020)
Variations and the negatives effects it causes on production capacity and planning are topics of significant interest in the manufacturing communities. This research investigates the hypothesis that, when operating in a ...
Estimation of cumulative prospect theory-based passenger behavioral models for dynamic pricing & transactive control of shared mobility on demand
(Massachusetts Institute of Technology, 2021)
This thesis studies the optimal design of large-scale shared mobility on demand services (SMoDS) in urban settings. Specifically, we build upon previous work done in the Active-Adaptive Control Lab lab on the dynamic pricing ...
Minimum-correction second-moment matching : theory, algorithms and applications
(Massachusetts Institute of Technology, 2020)
We address the problem of finding the closest matrix Ũ a given U under the constraint that a prescribed second-moment matrix P̃ must be matched, i.e.Ũ[T superscript]Ũ . We obtain a closed-form formula for the unique global ...
Development of solutions to reduce variability in material flow at a factory
(Massachusetts Institute of Technology, 2021)
This thesis focuses on improving the flow of material in an analytical instrument company, the Waters Corporation. One main pain point experienced at Waters is an observed uneven distribution in when instruments were ...
Trajectory optimization for dynamic aerial motions of legged robots
(Massachusetts Institute of Technology, 2021)
A novel framework for planning and executing dynamic aerial motions for legged robots is developed. These dynamic capabilities allow legged robots to conquer challenging obstacles like gaps and hurdles that cannot be ...