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Full-Text Articles in Engineering

Design And Fabrication Techniques Of Devices For Embedded Power Active Contact Lens, Errol Heradio Leon Jun 2015

Design And Fabrication Techniques Of Devices For Embedded Power Active Contact Lens, Errol Heradio Leon

Master's Theses

This thesis designed and fabricated various devices that were interfaced to an IC for an active contact lens that notifies the user of an event by detection of an external wireless signal. The contact lens consisted of an embedded antenna providing communication with a 2.4GHz system, as well as inductive charging at an operating frequency of 13.56 MHz. The lens utilized a CBC005 5µAh thin film battery by Cymbet and a manufactured graphene super capacitor as a power source. The custom integrated circuit (IC) was designed using the On Semiconductor CMOS C5 0.6 µm process to manage …


Toward The Systematization Of Active Authentication Research, Daniel Fleming Gerrity Jun 2015

Toward The Systematization Of Active Authentication Research, Daniel Fleming Gerrity

Master's Theses

Authentication is the vital link between your real self and your digital self. As our digital selves become ever more powerful, the price of failing authentication grows. The most common authentication protocols are static data and employed only once at login. This allows for authentication to be spoofed just once to gain access to an entire user session. Behaviometric protocols continuously consume a user’s behavior as a token of authentication and can be applied throughout a session, thereby eliminating a fixed token to spoof. Research into these protocols as viable forms of authentication is relatively recent and is being conducted …


Active Fog Catcher, Michael Giglio, Carson Hand, William Beechinor, Kai Zhang Jun 2015

Active Fog Catcher, Michael Giglio, Carson Hand, William Beechinor, Kai Zhang

Mechanical Engineering

The active fog catching senior project team has been asked to develop a device that will harvest water from the atmosphere, namely fog, using active means. The project will be centered on maximizing water collection rate, with efficiency as a secondary concern. The final design utilizes a refrigeration system in which fans pull air across the cold evaporators inside of a duct. Water condenses on the evaporators and drain into a collection container. It was decided to focus on maximizing water collection at the cost of efficiency because the feasibility of actively harvesting fog must be proved before trying to …


Piezoelectric Poly(Vinylidene Fluoride) Microstructure And Poling State In Active Tissue Engineering, Clarisse Ribeiro, Daniela M. Correia, S Ribeiro, Vitor Sencadas, Gabriela Botelho, Senentxu Lanceros-Méndez Jan 2015

Piezoelectric Poly(Vinylidene Fluoride) Microstructure And Poling State In Active Tissue Engineering, Clarisse Ribeiro, Daniela M. Correia, S Ribeiro, Vitor Sencadas, Gabriela Botelho, Senentxu Lanceros-Méndez

Faculty of Engineering and Information Sciences - Papers: Part A

Tissue engineering strategies rely on suitable membranes and scaffolds, providing the necessary physicochemical stimuli to specific cells. This review summarizes the main results on piezoelectric polymers, in particular poly(vinylidene fluoride), for muscle and bone cell culture. Further, the relevance of polymer microstructure and surface charge on cell response is demonstrated. Together with the necessary biochemical cues, the proper design of piezoelectric polymers can open the way to novel and more reliable tissue engineering strategies for cells in which electromechanical stimuli are present in their environment.


An Integrated Dielectrophoresis-Active Hydrophoretic Microchip For Continuous Particle Filtration And Separation, Sheng Yan, Jun Zhang, Chao Pan, Dan Yuan, Gursel Alici, Haiping Du, Yonggang Zhu, Weihua Li Jan 2015

An Integrated Dielectrophoresis-Active Hydrophoretic Microchip For Continuous Particle Filtration And Separation, Sheng Yan, Jun Zhang, Chao Pan, Dan Yuan, Gursel Alici, Haiping Du, Yonggang Zhu, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part A

Microfluidic manipulation of biological objects from mixture has a significant application in sample preparation and clinical diagnosis. This work presents a dielectrophoresis-active hydrophoretic device for continuous label-free particle separation and filtration. This device comprises interdigitated electrodes and a hydrophoretic channel. According to the difference of lateral positions of polystyrene particles, the device can run at separation or filtration modes by altering the power supply voltages. With an applied voltage of 24 Vp-p, both 3 and 10 μm beads had close lateral positions and were redirected to the same outlet. Under a voltage of 36 Vp-p, beads with the diameters of …