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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
211

A MAGNETIC PHASED ARRAY ANTENNA FOR COMMUNICATION WITH IMPLANTED BIOMEDICAL DEVICES IN SMALL ANIMALS

Lekas, Michael S. January 2009 (has links)
No description available.
212

Laplace-Pressure Actuation of Liquid Metal Devices For Reconfigurable Electromagnetics

Cumby, Brad Lee 12 September 2014 (has links)
No description available.
213

Non-Contact, Antenna-Free Probes for Characterization of THz Integrated-Devices and Components

Daram, Prasanna Kumar January 2014 (has links)
No description available.
214

Efficient Microwave Imaging Algorithms with On-Body Sensors for Real-Time Biomedical Detection and Monitoring

Islam, Md Asiful January 2017 (has links)
No description available.
215

A Study of the Frequency Dependence of Permittivity and Permeability in Lossless One-Dimensional Composite Right/Left Handed Metamaterials by the Equivalent Circuit Model

Esfahani, Pedram 10 October 2016 (has links)
No description available.
216

Forward-Looking Lateral Wave Radar For Ied Detection And Classification

Sprungle, Raymond James 08 December 2008 (has links)
No description available.
217

Studies of Radio Frequency Interference Detection Methods in Microwave Radiometry

Guner, Baris 26 June 2009 (has links)
No description available.
218

Realization of a Planar Low-Profile Broadband Phased Array Antenna

Kasemodel, Justin Allen 29 October 2010 (has links)
No description available.
219

Artificial Neural Network-Based Approaches for Modeling the Radiated Emissions from Printed Circuit Board Structures and Shields

Kvale, David Thomas January 2010 (has links)
No description available.
220

The study and development of distributed devices for concurrent vibration attenuation and energy harvesting

Harne, Ryan Lee 10 February 2012 (has links)
This work focuses on the broadband attenuation of structural vibration and, in the process, employs a new perspective of vibrational energy harvesting devices. The first part of the research studies and develops a continuously distributed vibration control device which combines the benefits of point mass-spring-dampers at low frequencies as well as the resistive or dissipative influence of constraining treatments at high frequencies. This embodiment provides broadband passive vibration attenuation for a minimal cost in added mass, spanning the present divide between the ability to attenuate a single low frequency and the need to attenuate all frequencies. The second part adopts a vibration control perspective to energy harvesting analysis and considers the harvesting devices to be electromechanically stiffened and/or damped vibration absorbers. Rigorous analysis and experiments are carried out which show that vibration control and energy harvesting appear to be mutually beneficial given that maximum harvested energy from structural vibrations is achieved when the harvesters exert a finite dynamic influence on the host system. This suggests that vibration control concerns presently alleviated using tuned-mass-dampers are ideal energy harvesting applications. A generalized analytical model is derived which is applicable to both portions of the work. Continuously distributed vibration control devices are studied in depth and a superposition method is presented which allows for convenient implementation of a realistic device design into the numerical model. Tests carried out with the distributed device validate the model as well as show the device's competitive benefits compared with traditional, and much heavier, vibration control treatments. The inclusion of electromechanical coupling effects into the modeling is straightforward and numerous analyses are carried out to observe how electromagnetic and piezoelectric energy harvesting devices affect the dynamics of the host vibrating structure while the harvesters themselves convert the 'absorbed' energy into electrical power. Altering the device created in the first portion of the research to use a piezoelectric material as the distributed spring yields one such embodiment capable of both surface vibration control and energy harvesting. Tests carried out with the device additionally serve as model validation but also indicate that, for a given harvester, the attenuation of and energy harvesting from structural vibrations are nearly simultaneously maximized as modeling predicted. / Ph. D.

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