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 12 of 12 for “"Geomagnetism"”.
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The Influence of Geomagnetism on the Maze Behavior of Dugesia Tigrina
The present study is concerned with investigating whether planarian flatworms are capable of learning in an instrumental conditioning paradigm, and whether or not this ability to learn is affected by orientation in the geomagnetic field.
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The eye of the needle: magnetic survey and the compass of capital in the age of revolution and reform
… thesis charts the globalising role of British geomagnetism in the age of revolution and reform. In the earlier decades of the nineteenth century, significant fiscal-military state resources were directed toward linking three momentous magnetic enterprises: Admiralty reform of practical magnetic …
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High-Sensitivity Nitrogen-Vacancy Center Magnetometry: from DC to GHz
… biological systems, electronics testing, and geomagnetism. However, despite the prospect of comparable magnetic field sensitivity, the performance of NV bulk magnetometers sensing low-frequency fields continues to lag behind that of their atomic vapor cell and superconducting counterparts by …
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Developing archaeomagnetic dating in the British Iron Age.
… This research aimed to use the evidence of past geomagnetism, as recorded by archaeological and geological materials, to identify and characterise short timescale changes in the Earth¿s magnetic field. This contribution to the discipline focused on the first millennium BC, as there is evidence …
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A combined magnetic and gravity analysis of the Sauble anomaly, Lake County, Michigan
Thesis (M.S.)--Michigan State University. Dept. of Geology, 1963
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A geomagnetic survey of Pembina, Grand Forks, and eastern Walsh counties, North Dakota
<p>From August, 1977, to March, 1978, total field geomagnetic readings were taken at 948 sites in the following counties in North Dakota: Pembina County, Grand Forks County, and Walsh County east of 98°W. longitude. The field data was contoured by computer using the SYMAP commercial computer …
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Geomagnetic variations in the Northwest Atlantic : implications for the electrical resistivity of the oceanic lithosphere
A geomagnetic variation study on mature oceanic lithosphere in the North Atlantic just south of Bermuda has revealed the presence of at least one layer of low electrical resistivity. The low resistivity layer of approximately 10 ohm-m has been found at three widely spaced seafloor sites with …
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Pressure-driven instability in planetary stagnant lids
Rocky planets and large rocky satellites begin their evolution as relatively hot planetary bodies, both in the interior and on the surface. Heat released during planetary accretion is thought to have resulted in temperatures well in excess of the solidus of silicates, with radiogenic heating also …
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Towards extracting artistic sketches and maps from digital elevation models
The main trend of computer graphics is the creation of photorealistic images however, there is increasing interest in the simulation of artistic and illustrative techniques. This thesis investigates a profile based technique for automatically extracting artistic sketches from regular grid digital …
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Impact of Geomagnetically Induced Currents on Power Transformers
This thesis deals with the impact of Geomagnetically Induced Current (GIC) on power transformers in electrical power systems. A simulator to calculate the flows of GIC in an electrical power network, based on an assumed or measured induced geoelectric potential is proposed. This simulator includes …
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Applications of time series analysis to geophysical data
This thesis consists of three papers applying the techniques of time series analysis to geophysical data. Surface wave dispersion along the Walvis Ridge, South Atlantic Ocean, is obtained by bandpass filtering the recorded seismogram in the frequency domain. The group velocity is anomalously low in …
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Stochastic inversion for core field modeling using satellite data
Magnetfeldmodellierung mit Kugelflächenfunktionen basiert auf der Inversion nach hunderten bis tausenden von Parametern. Dieses hochdimensionale Problem kann grundsätzlich als ein Optimierungsproblem formuliert werden, bei dem ein globales Minimum einer gewissen Zielfunktion berechnet werden soll. …