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 “"Electrical current"”.
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Electrical current generation by wild type and mutant Shewanella strains
… chamber electrochemical cells to show that the current generation capabilities of Shewanella oneidensis are dependent on the ability of cells comprising a biofilm to shuttle soluble electron carriers between an electrode and its outer membrane cytochromes. The extracellular electron transfer …
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Finite element modeling of crack detection in aircraft structures using electrical current
… metallic sheets, plates and tubes that have good electrical conductivity.;Aircraft structures and wings are made of aluminum sheets riveted together. Cracks are often found emanating from the edge of the rivet holes which are covered by the rivets and are difficult to be detected. Electromagnetic …
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Effect of Electrode Size, Shape, and Placement on Electrical Current and Subject Comfort During Electrical Stimulation
… stimulating electrodes during the application of electrical stimulation (ES) to the biceps, quadriceps, and tibialis anterior muscles. Subjects were recruited to allow for diversity in age, sex, and skin pigmentation. Subjects sat in a custom designed multi-positional chair, which allowed precise …
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Adaptive defibrillator design
… in patients with myocardivim abnormalities. Electrical defibrillation is usually achieved by passing an electrical current pulse transthoracically through the heart of the patient. The source of this electrical current is usually a high voltage capacitor. The successful operation of …
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CURRENT-INDUCED MAGNETIC FIELD-FREE SWITCHING OF PERPENDICULAR MAGNETIZATION
… tool for controlling the magnetic order through electrical current in magnetic materials. Conventional method for field-free switching is complicated. In this thesis, we demonstrate the existence of out-of-plane spin torque in HM/FM bilayer and also a single layer structure, which simplify the …
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Quantum transport in Josephson junctions
… between the two superconducting reservoirs, electrical current will flow between them. To study this transport we utilise the techniques of non-equilibrium Green’s functions; capable of probing the interplay between coherent quantum effects over macroscopic distances. We begin by broadly …
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Direct measurement of vanadium cross-over in an operating redox flow battery
… across ion exchange membranes in the absence of electrical current. In this work a novel VRB cell is described in which ion cross-over can be measured directly in the presence and absence of electrical current. Measurements are made of cross-over using this cell with three different types of ion …
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Investigation of Instability of a Single Crystal Organic –Inorganic Hybrid Perovskites Used for Photovoltaic Solar Application.
… of these materials directly affects their electrical properties which are a functional requirement of photonic devices. Therefore, towards the widespread adoption of these materials it was necessary to investigate stability mechanisms of methylammonium lead bromide (MAPbBr3) as a single …
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How do pre-service teachers picture various electromagnetic phenomenon? : a qualitative study of pre-service teachers' conceptual understanding of fundamental electromagnetic interaction
… various electromagnetic phenomena, specifically electrical current, electrical resistance, and light/matter interactions. This is achieved through the students answering the three questions on electromagnetism using a free response approach including both verbal and pictorial representation. The …
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Enhancing the functionality of photovoltaic and photonic biointerfaces through structuration
… bacteria and the strong dependence of their electrical current generation on electrode structure and pigment organisation. Part two uncovers surprising design principles of photonic structures on flower petals and presents research tools to study disordered optical systems. Biophotovoltaics …
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Integrated Inp Photonic Switches
… attractive because of their small size, low electrical power consumption, and compatibility with integration of laser sources, photo-detectors, and electronic components. In this dissertation the development of integrated InP photonic switches using an area-selective zinc diffusion process …
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An electromechanical system for characterization of piezoelectric materials
… to mechanical stimulation by producing an electrical current and vice versa. They perform a pivotal role in medical applications both for diagnostic and therapeutic purposes. In this regard, characterizing the piezoelectric properties of these materials is crucial for their usage. In this …
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Polarization dependent photocurrents in thin films of the topological insulator Bi₂Se₃
… insulator include the flow of pure spin currents and topological protection. Pure spin current, distinct from electric current, is a net flow of spin without a net flow of charge. Recent research at MIT has revealed that shining circularly polarized laser light on a topological insulator …
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Exploration of the CU-MN-AS ternary phase diagram and MN3B4 antiferromagnets
… goal of reading and writing spin orientations by electrical current. Tetragonal CuMnAs is a candidate whose experimental reading and writing with electrical field has been realized as a proof of concept. Our fundamental knowledge of other phases in the Cu-Mn-As ternary system remains to be …
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Electrodisinfection of Municipal Wastewater Effluent
… coagulate and remove non-settleable solids. By electrically dissolving aluminum to form solids-bridging aluminum hydroxide, the water itself can also be disinfected by the effects of electrical fields and its reactions to form disinfectant chemicals and direct destruction of microorganisms in …
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Novel thermoelectric materials development, existing and potential applications, and commercialization routes
… alternatively generate and absorb heat when an electrical current is run through them. It was established in the 1950's that the effectiveness of a thermoelectric could approximately be described in terms of a dimensionless figure of merit ... being respectively the Seebeck coefficient, the …
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Silicon Nanoelectronics for Quantum Metrology Standard and Cryogenic SBMOSFET
… important applications in the field of quantum electrical current metrology and quantum information processing. First, we implmeneted an extremely accurate gigahertz silicon-based single-electron(SE) pump for the redefinition of the International Standard unit for the electrical current, Ampere. …
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Novel Integration of Conductive-Ink Circuitry with a Paper-Based Microfluidic Battery as an All-Printed Sensing Platform
… analysis in resource-limited applications. Current battery designs within such devices have yet to adopt a ubiquitous circuitry material, necessitating investigation into printed circuitry for scalable platforms. In this study, a microfluidic battery was mated with silver-nanoparticle …
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Compensação de temperatura para sensores de corrente elétrica baseados em redes de Bragg em fibras ópticas
… the development of temperature compensation for electrical current sensors based on fiber Bragg gratings using the twin gratings technique. The measurement of electric current by opto-mechanical sensors is very well described in the literature, as well as techniques that propose the compensation …
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Your brain on 9 volts : the specter and hype of electrical brain stimulation
… to improve the brain has captivated many. Electrical gadgets attract the rich and the poor, the educated and uneducated, the scientist and the charlatan. Over hundreds of years, people have tried everything from shocking away headaches with live torpedo fish, to bombarding patients' brains …
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