Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Bi-Stability"”.
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Bi-stability in the Wakes of Platooning Ahmed Bodies
… of decreased energy consumption through the ability to platoon in closer formation than is currently safe or legal. It is therefore increasingly important to understand the complex and dynamic wake interactions between vehicles operating in close proximity for aerodynamic gains. In recent …
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Design of a morphing airfoil exhibiting bi-stability using topology optimization
… design a novel camber morphing mechanism for a bi-stable airfoil using topology optimization. The goal is to use snap-through instabilities to actuate and maintain the shape of the morphing airfoil. Topology optimization has been used to distribute material over the design domain and to tailor …
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Use of a triboelectric generator for a tunable wideband energy harvester and a threshold shock sensor
… shock sensor is proposed that incorporates bi-stability along with the triboelectric effect. A clamped-clamped buckled beam will switch stable states when a threshold shock amplitude is experienced and a voltage peak will occur during this switching of states. Levels of input acceleration …
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A Mathematical Model of the Sleep-Wake Cycle
… another, but also allow for a certain degree of bi-stability that locks the organism in a given state for some while before it switches back. In order to better understand how the behavioral states are regulated by different neuron groups, I describe how to use the S-system method for the …
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The Convergence of Parametric Resonance and Vibration Energy Harvesting
… technology that derives electricity from the ambient environment in a decentralised and self-contained fashion. Applications include self-powered medical implants, wearable electronics and wireless sensors for structural health monitoring. Amongst the vast options of ambient sources, vibration …
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Statistical Stability and Fast Transient Growth in Wall-Bounded Turbulence
… a wall and thus the shear-driven turbulence are ubiquitous in nature and engineering applications. Hence, prediction and modelling of the turbulence appearance and maintenance in wall-bounded flows have major implications to flow control. However, the fully developed turbulent dynamics of …
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Piezoelectric Energy Harvesting for Powering Wireless Monitoring Systems
… bulky volume, and limited energy capacity. Ambient energy in different forms such as vibration, movement, heat, wind, and waves otherwise wasted can be converted into usable electricity using proper transduction mechanisms to power sensors and low-power devices or charge rechargeable …
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Optical properties and thermal conductivity of resistive Au nanogranular films
… At room temperature and atmospheric pressure, stability and reproducibility of the resistance switching of such nanogranular Au films was observed to last over many hours thus making them ideal test beds for exploration of the basic mechanisms of the switching processes and allow convenient …