Academic literature on the topic 'Low frequency electromagnetic waves'

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Dissertations / Theses on the topic "Low frequency electromagnetic waves"

1

Liu, Zhongjian. "Investigation of low frequency electromagnetic waves for long-range lightning location." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760951.

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Lightning is the strongest natural electromagnetic radiation source, emitting electromagnetic energy in the frequency range from ~4 Hz to ~300 MHz or more. The location of lightning is calculated based on the received electromagnetic waves. The received electromagnetic waves, or lightning sferics, propagate from the lightning radiation source to the receiver along the ground path and reflections by the ionosphere named sky waves. Particularly for a long-baseline (>400 km) lightning receiver array, the received electromagnetic waves are usually a mixture of the ground wave and sky waves, which
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2

Seguin, Sarah Ann. "Detection of low cost radio frequency receivers based on their unintended electromagnetic emissions and an active stimulation." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Seguin_09007dcc80708216.pdf.

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Thesis (Ph. D.)--Missouri University of Science and Technology, 2009.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed November 23, 2009) Includes bibliographical references.
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3

Umeda, Takayuki. "Generation of low-frequency electrostatic and electromagnetic waves as nonlinear consequences of beam–plasma interactions." American Institite of Physics, 2008. http://hdl.handle.net/2237/12028.

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4

Chen, Chi-Chih. "Design and applications of two low frequency guided wave electromagnetic measurement structures." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406708013.

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5

Pokkuluri, Kiran S. "Effect of Admixtures, Chlorides, and Moisture on Dielectric Properties of Portland Cement Concrete in the Low Microwave Frequency Range." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/37039.

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The use of electromagnetic waves as a nondestructive evaluation technique to evaluate Portland cement concrete (PCC) structures is based on the principle that a change in the structure, composition, or properties of PCC results in a change in its dielectric properties. The coaxial transmission line is one of the few devices that can measure the dielectric properties of PCC at a frequency range of 100-1000 MHz. A coaxial transmission line developed at Virginia Tech was used to study the effect of moisture, type of aggregate, water/cement ratio, curing period, admixture type (microsilica,
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Bittle, James R. "2017 Full Solar Eclipse| Observations and LWPC Modeling of Very Low Frequency Electromagnetic Wave Propagation." Thesis, University of Colorado at Denver, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10843376.

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<p> On August 21, 2017 a total solar eclipse occurred over the United States commencing on the west coast moving across to the east coast providing an opportunity to observe how the rapid day-night-day transition changed the ionosphere&rsquo;s D-region electron density and how very low frequency (VLF) electromagnetic wave propagation was affected. To observe the solar obscurity effects, VLF receivers were deployed in two locations: one in the path of totality in Lakeside, Nebraska and another south of the totality path in Hugo, Colorado. The locations were chosen to achieve an orthogonal geome
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7

MAROUAN, YOUSSEF. "Etat de polarisation et caracteristiques de propagation moyennes d'emissions em naturelles dans un magnetoplasma froid : application aux donnees ebf du satellite aureol-3." Orléans, 1988. http://www.theses.fr/1988ORLE2040.

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Observation supposee effectuee en un point fixe de l'espace. Cette observation consiste en la mesure simultanee d'au moins trois composantes du champ electromagnetique. Discussion des estimateurs du degre de polarisation proposes par samson. Simulation numerique. Identification experimentale des modes d'une onde multiple en propagation dans ce magnetoplasma (ou deux modes peuvent coexister), obtenue a partir des caracteristiques de polarisation des ondes. Application aux emissions tres basse frequence observees par satellite aureol-3
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Suedan, Gibreel A. "High frequency beam diffraction by apertures and reflectors." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27545.

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Most solutions for electromagnetic wave diffraction by obstacles and apertures assume plane wave incidence or omnidirectional local sources. Solutions to diffraction problems for local directive sources are needed. The complex source point representation of directive beams together with uniform solutions to high frequency diffraction problems is a powerful combination for this. Here the method is applied to beam diffraction by planar structures with edges, such as the half-plane, slit, strip, wedge and circular aperture. Previously used restrictions to very narrow beams and paraxial regions,
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Kipp, Robert. "Mixed potential integral equation solutions for layered media structures : high frequency interconnects and frequency selective surfaces /." Thesis, Connect to this title online; UW restricted, 1993. http://hdl.handle.net/1773/5974.

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Lachin, Anoosh. "Low frequency waves in the solar system." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267713.

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