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 20 of 95 for “"MFC"”.
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Characterization of Oscillatory Lift in MFC Airfoils
… an oscillatory morphing, Macro-fiber composite (MFC) trailing edge. Correlation of the airfoil lift with the oscillatory input is presented. Modal analysis of the test airfoil and apparatus is used to determine the frequency response function. The effects of static MFC inputs on the FRF are …
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Evaluating the Aerodynamic Performance of MFC-Actuated Morphing Wings to Control a Small UAV
… />wing system that uses Macro Fiber Composites (MFC) to create camber change. This<br />thesis can be broken into two major sections. The first half compares a few current MFC<br />airfoil designs to each other and to a conventional servomechanism (servo) airfoil. Their<br />performance was …
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Improving the Cathode Conditions by Pressurizing and Carbon Dioxide Addition to Enhance the Practicality of MFC Treatment of Wastewater
An increasing global energy demand coupled with a more rigorous governmental regulatory environment: including identifying carbon dioxide as a pollutant) is becoming more and more incompatible with engineering practices that were developed in an era of lower energy costs and less regulation. It is, …
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Electrical Properties of Macro-Fiber Composite Actuators and Sensors
… Research Center, the Macro-Fiber Composite (MFC) actuator and sensor is the most sophisticated PFC device yet invented. With superior qualities among PFCs in performance, behavior repeatability and manufacturability, the MFC has spawned great interest in the commercial and academic community …
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Macro-Fiber Composites for Sensing, Actuation and Power Generation
… in this thesis uses the macro-fiber composite (MFC) actuator that was recently developed at the NASA Langley Research Center for two major themes, sensing and actuation for vibration control, and power harvesting. The MFC is constructed using piezofibers embedded in an epoxy matrix and coated …
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Macro Fiber Composite Actuated Unmanned Air Vehicles: Design, Development, and Testing
… commonly known as Macro Fiber Composite (MFC) is used for wing morphing. The actuation capability of this actuator on fiberglass unimorph was modeled by the Rayleigh-Ritz method and quantified by experimentation. Wind tunnel tests were performed to compare conventional trailing edge …
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Systems Approaches to Enhance Performance and Applicability of Microbial Fuel Cells
… such contender might be the microbial fuel cell (MFC), a subset of bioelectrochemical system (BES) which generates electricity in the process of electrogenic (generating electrons) degradation of soluble organic contaminants present in the water (or wastewater) by electrogens (electron producing …
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Finite Element Modeling of Macro Fiber Composite Actuators with Application to Wing De-icing
… in which lightweight Macro Fiber Composite (MFC) actuators are used to break the adhesive bond between the leading edge of a wing and an accumulated ice layer. The concept for this technique relies on the fact that when a structure is excited at its natural frequencies, the shear stress …
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Strategies for enhancing bioelectrochemical remediation of petroleum hydrocarbons
… hydrocarbon pollutants. Despite its potential, MFC is faced with several limitations. To this end, BES research aimed at enhancing the degradation of petroleum hydrocarbon pollutants was carried out in this study. Samples from PH polluted matrices (groundwater, sediment and soil) in the …
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Clinical Impact of A Highly Sensitive Next-Generation Sequencing Measurable Residual Disease Assay In Patients With Acute Lymphoblastic Leukemia
… MRD negative by multiparameter flow cytometry (MFC), 46% were MRD positive by the NGS assay. At the time of complete remission (CR), MRD negativity by MFC at a sensitivity of 1x10<sup>-4</sup> and NGS at a sensitivity of 1x10<sup>-6</sup> was achieved in 66% and 23% of patients, respectively. …
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Improving bio-electricity production and waste stabilization in Microbial Fuel Cells
… are sought, such as Microbial fuel cells (MFC) where electrogenic bacteria can degrade organic matter present in the waste stream while simultaneously generating electricity. MFCs represent an emerging technology which may deliver the capability to reduce the pollution potential of low …
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Bioremediation of petroleum hydrocarbons using microbial fuel cells
… mankind) largely depend. Microbial fuel cells (MFCs) could be employed in the treatment of these environmental pollutants with concomitant bioelectricity generation. Therefore, the overarching objective of this study was to develop an MFC system for the effective and efficient treatment of …
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Treatment of azo dyes in industrial wastewater using microbial fuel cells
… Therefore, in this study, microbial fuel cells (MFCs) were studied as possible systems that could effectively degrade azo dyes with an additional benefit of concomitant biogenic electricity generation. The co-metabolic degradation of the model azo dye Acid Orange-7 (AO-7) using Shewanella …
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A Bioelectrochemical Sensing System for Measuring Acidic Bioprocess Fermentation End Products
… satisfactory. In this study microbial fuel cell (MFC) technology has been tested for its capabilities to measure VFAs and the method explored for its stability, repeatability, recovery and implementation on real wastewater samples. The amperometric signals derived from MFCs were correlated to …
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Dual Mode Macro Fiber Composite-Actuated Morphing Tip Feathers for Controlling Small Unmanned Aircraft
… for smart materials. A Macro Fiber Composite (MFC), a smart material, takes advantage of the piezoelectric effect and provides an attractive alternative actuator to servos in the Small Unmanned Aerial Systems (SUAS) regime of flight. This research looks to take MFC actuated control surfaces one …
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Management of the Medically Fragile Child in the K- Fifth Grade Classroom Setting
… needs of teachers of medically fragile children (MFC), in the grade setting, with the hope of designing educational modules to be utilized as supportive measures by the teachers for the classroom setting. The focused project consisted of an extensive literature review of medical fragility in …
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Engineering of Microbial Fuel Cells technology: Materials, Modelling and Architecture
A Microbial fuel cell (MFC) is a bio-electrochemical reactor, able to convert chemical energy, contained in organic substrate, in electrical energy, thanks to the metabolic activity of microorganisms. Firstly, a fluid-dynamic modelling of different Microbial Fuel Cell configurations to study …
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A domain-general perspective on medial frontal brain activity during performance monitoring
Activity of the medial frontal cortex (MFC) has been implicated in attention regulation and performance monitoring. The MFC is thought to generate several event-related potential (ERPs) components, known as medial frontal negativities (MFNs), that are elicited when a behavioural response becomes …
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