Academic literature on the topic 'SCIENCE / Physics / Magnetism'

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Dissertations / Theses on the topic "SCIENCE / Physics / Magnetism"

1

Hagelberg, Frank. "Magnetism in Carbon Nanostructures." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etsu_books/151.

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Magnetism in carbon nanostructures is a rapidly expanding field of current materials science. Its progress is driven by the wide range of applications for magnetic carbon nanosystems, including transmission elements in spintronics, building blocks of cutting-edge nanobiotechnology, and qubits in quantum computing. These systems also provide novel paradigms for basic phenomena of quantum physics, and are thus of great interest for fundamental research. This comprehensive survey emphasizes both the fundamental nature of the field, and its groundbreaking nanotechnological applications, providing
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2

Murphy, Martin Joseph 1970. "The electrification of Florida thunderstorms." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/290670.

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Six thunderstorms that occurred at the NASA Kennedy Space Center, Florida, have been studied in an attempt to characterize their electrical structure and electrification. Ground-based measurements of the cloud electric fields, the locations of lightning VHF radio sources, cloud-to-ground lightning strike points, and dual-polarization radar data were used in this study. Changes in the electric field due to lightning were used to determine the locations and magnitudes of changes in cloud charge. The fields themselves were used to compute displacement current densities following lightning flashes
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3

Gibbard, Seran Gwen 1967. "Lightning in the solar system." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/290640.

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Lightning, a familiar phenomenon on Earth, may also occur at other times and locations in our solar system. It has been suggested as a mechanism for forming chondrules, millimeter-sized beads of glassy silicate found in primitive meteorites formed in the early solar system 4.5 billion years ago. It has also been detected in Voyager images of Jupiter, and there is evidence that it may occur on other planets as well, including Venus, Saturn and Neptune. The mechanism believed to produce lightning discharges on Earth, and possibly other planets, is charge production by collisions of ice particles
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4

Philippi, Kristen Haber. "An Examination of Student Understanding of the Use of Models in Science and Conceptual Understanding of Electricity and Magnetism." ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/1114.

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The purpose of this study is to inform instruction by increasing the body of knowledge regarding the relationship between college physics students' knowledge about models in science and their conceptual understanding with regard to electricity and magnetism. The data for this study was obtained through the administration of two instruments: Conceptual Survey of Electricity and Magnetism, a multiple choice assessment, and Student Understanding of Models in Science, a Likert-scale survey. Both traditional statistics and an innovative technique called Model Analysis were used to analyze the data.
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5

Roseman, Mark A. "Low temperature magnetic force microscopy studies of superconducting niobium films." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38266.

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Low temperature magnetic force microscopy studies of superconducting niobium films have been undertaken with the goal of studying the interplay between artificial pinning centers and magnetic vortices.<br>Measurements were performed using a custom built low temperature magnetic force microscope, capable of operation at temperatures ranging from 4.2 K to room temperature. Special attention has been paid to optimizing the instrumentation through a detailed study of the noise characteristics, with particular emphasis placed on achieving a large signal-to-noise ratio and corresponding high force g
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6

Jiao, Jun 1957. "Comparative study of the properties, morphologies, and structures of carbon nanoclusters prepared by different methods." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282358.

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This study was undertaken to gain a greater understanding of the growth mechanism of carbon nanoclusters. A set of carbon nanocluster samples prepared by three different methods and under different conditions was characterized with respect to morphology, structure, composition, and related properties. Electron microscopy characterization techniques were used to identify these features. The carbon nanoclusters prepared by conventional arc discharge, modified arc discharge, and catalytic CO disproportionation appear quite different on the surface, but have features in common that this study emph
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7

Christiansen, David A. "Investigation of magnetic proximity effect in ferromagnet/superconductor thin films by low temperature Magneto Optical Kerr Effect measurement." California State University, Long Beach, 2013.

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8

Wang, Haiping 1969. "Studies of compounds related to Cu(In-xGax)Se solar cells." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=38434.

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Crystals of Cu(In1-xGax)3Se 5 were grown by the horizontal and vertical Bridgman methods. A non-contact carbon coating was used to avoid the adhesion between Cu(In1-x Gax)3Se5 ingots and the inner ampoule walls. The composition along and across the as grown ingots with different starting Ga contents was analyzed and the results were interpreted by the established pseudobinary phase diagrams. Results of XRD confirmed that the lattice constants of the Cu(In1-xGax)3Se 5 crystals varied linearly with the Ga content. Results of X-ray Laue back-reflection showed that the Cu(In1-xGax) 3Se5 ingots con
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9

Mercado, Sanchez Gema Alejandrina. "Modeling hotspot dynamics in microwave heating." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/289032.

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The formation and propagation of hotspots in a cylindrical medium that is undergoing microwave heating is studied in detail. A mathematical model developed by Garcia-Reimbert, C., Minzoni, A. A. and Smyth, N. in Hotspot formation and propagation in Microwave Heating, IMA, Journal of Applied Mathematics (1996), 37, p. 165-179 is used. The model consists of Maxwell's wave equation coupled to a temperature diffusion equation containing a bistable nonlinear term. When the thermal diffusivity is sufficiently small the leading order temperature solution of a singular perturbation analysis is used t
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10

Belyea, Dustin David. "Analysis of Critical Behavior in Magnetic Materials." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5180.

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This work contains a broad study of a variety of magnetic materials undergoing second order phase transitions. In general this leads to an overall increase in information and analytical methods to further the field of magnetocalorics. Specifically, critical aspects of magnetocaloric materials were compared within systems in relation to structure, stoichiometry, magnetic minority phases and magnetic contaminants. Detailed analyses were developed to quantify techniques which were in the past used mainly in a qualitative way, leading to a more complete understanding of how critical phenomena impa
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