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Now showing items 371-377 of 377
Low-frequency, low-amplitude MEMS vibration energy harvesting
(Massachusetts Institute of Technology, 2018)
Vibration energy harvesters work effectively only when the operating conditions match with the available vibration source. Typical resonating MEMS structures cannot be used with low-frequency, low-amplitude and unpredictable ...
Computation of nonlinear hydrodynamic loads on floating wind turbines using fluid-impulse theory
(Massachusetts Institute of Technology, 2016)
Wind energy is one of the more viable sources of renewable energy and offshore wind turbines represent a promising technology for the cost effective harvesting of this abundant source of energy. To capture wind energy ...
Perception and control of robot legged locomotion over variable terrain
(Massachusetts Institute of Technology, 2016)
This thesis investigates the role of foot-ground dynamics in robot legged locomotion. Empirical observation with robot hardware is critical for such investigation due to the complexity of impact dynamics and the infinite ...
Studying phonon mean free paths at the nanoscale : modeling and experiments
(Massachusetts Institute of Technology, 2016)
Heat conduction in semiconductors and dielectrics involves cumulative contributions from phonons with different frequencies and mean free paths (MFPs). Knowing the phonon MFP distribution allows us to gain insight into the ...
Design tools and mechanisms for progressive cavity pumps
(Massachusetts Institute of Technology, 2019)
This thesis presents tools to design progressive cavity pumps (PCPs), with an emphasis on low-viscosity fluids. These models indicate that high speed operation can increase sealing performance, decrease pump size, and ...
Tissue-like hydrogels by design
(Massachusetts Institute of Technology, 2019)
Human bodies are mostly made of soft, wet yet robust biological hydrogels such as cartilages, ligaments, and muscles. The biological hydrogels commonly possess mechanical properties such as high toughness, resilience and ...
A portable, ultra-Low cost NMR device
(Massachusetts Institute of Technology, 2019)
Nuclear magnetic resonance (NMR) provides powerful measurements that remain inaccessible in many applications due to the instruments' size and expense. Recent research efforts have focused on creating handheld devices with ...