Browsing Engineering (Faculty of) by Supervisor "Abdel-Rahman, Eihab"
Now showing items 1-16 of 16
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Combined Electrostatic/Electromagnetic MEMS Actuators
(University of Waterloo, 2016-08-10)In this work, one and two degrees of freedom (DOF) lumped mass models of Micro- Electro-Mechanical System (MEMS) actuators are introduced, investigated, and compared to experimental results. A one degree of freedom system ... -
Design of an Integrated Electrostatic Atomic Force Microscope
(University of Waterloo, 2018-05-22)The need for investigation and characterization of physical, chemical and structural properties of material surfaces at the micro and nano scales led to the invention of Atomic Force Microscopy (AFM) in 1986 as a successor ... -
Design, fabrication and characterization of ferroelectret energy harvester
(University of Waterloo, 2019-04-22)Energy harvesters gained significant interest over the last decade with the reduce in power requirements of today’s electrical devices and with the fast developments in low-power electronics. Limited battery life is one ... -
Design, Fabrication and Characterization of MEMS Gyroscopes Based on Frequency Modulation
(University of Waterloo, 2018-07-24)Conventional amplitude modulated (AM) open loop MEMS gyroscopes experience a significant performance trade-off between having a large bandwidth or high sensitivity. It is impossible to improve both metrics at the same time ... -
Electromagnetic Vibrational Energy Harvesters and Power Management
(University of Waterloo, 2016-01-14)The interest in scavenging various energy sources from the environment is rapidly increasing. Thanks to the advances in developing effective energy harvesters researches. Kinetic energy is a renewable source and it can ... -
Electrostatic MEMS Bifurcation Sensors
(University of Waterloo, 2018-08-24)We report experimental evidence of a new instability in electrostatic sensors, dubbed quasi-static pull-in, in two types of micro-sensors operating in ambient air. We find that the underlying mechanism and features of this ... -
Electrostatic Micro-Tweezers
(University of Waterloo, 2020-06-25)This dissertation presents a novel electrostatic micro-tweezers designed to manipulate particles with diameters in the range of 5-14 μm. The tweezers consist of two grip-arms mounted to an electrostatically actuated initially ... -
Fabrication, Testing and Characterization of MEMS Gyroscope
(University of Waterloo, 2017-05-16)This thesis presents the design, fabrication and characterization of two Micro-Electro-Mechanical Systems (MEMS) vibratory gyroscopes fabricated using the Silicon-On-Insulator-Multi-User-MEMS Process (SOIMUMPs) and Polysilicon ... -
Fast Stress Detection via ECG
(University of Waterloo, 2019-05-23)Nowadays stress has become a regular part of life. Stress is difficult to measure because there has been no definition of stress that everyone accepts. Furthermore, if we do not get a handle on our stress and it becomes ... -
Graphene Nanoparticle-Polymer Composite Fabricated by Pulsed Laser Ablation in Liquid
(University of Waterloo, 2016-06-09)Graphene is an attractive alternative material for diverse applications in electronic devices, fuel cells, biomedical sensors, energy storage, and super-capacitors due to its exceptional thermal, electrical, optical and ... -
Interactions of Magnetic Pendulums
(University of Waterloo, 2019-09-03)In recent years, coupled magnetic oscillators have received remarkable attention due to their application in vibration energy harvesting techniques and also its promising ability to help researchers to have a better ... -
Jerk as a Method of Identifying Physical Fatigue and Skill Level in Construction Work
(University of Waterloo, 2019-04-26)Researchers have shown that physically demanding work, characterized by forceful exertions, repetition, and prolonged duration can result in fatigue. Physical fatigue has been identified as a risk factor for both acute and ... -
Optimal Material Selection for Transducers
(University of Waterloo, 2018-02-15)When selecting an active material for an application, it is tempting to rely upon prior knowledge or commercial products that fit the design criteria. While this method is time effective, it does not provide an optimal ... -
Power Module Packaging in Automotive Applications
(University of Waterloo, 2016-05-02)In this study, nano silver paste was used as die attach material with the aim of increasing reliability of joints in power modules in automotive applications. Prior to joining, nano silver paste was spread on the interface ... -
Resonant Adaptive Mirrors
(University of Waterloo, 2020-05-28)Deformable mirrors (DMs) are integrated into adaptive optical (AO) systems to compensate for wavefront aberrations. These aberrations degrade the image resolution of telescopes, microscopes, ophthalmoscopes, and optical ... -
Use of Kinematics to Minimize Construction Workers' Risk of Musculoskeletal Injury
(University of Waterloo, 2017-03-29)Construction work requires more repetitive and highly physical effort than, for example, office work. Despite technological advancements in construction, the human factor is still an essential part of the industry. Hence, ...