Thesis (M.A.)--Boston University

Thesis (M.S.)--Boston University, 1946. This item was digitized by the Internet Archive.

Thesis (M.S.)--Boston University

Island je jednou z mála zemí, která neustále zůstává vně Evropské unie. Cílem práce je zmapovat členství Islandu v hlavních evropských integračních seskupeních druhé poloviny 20. století, se zaměřením na jeho specifický vztah k EU. První část je věnována komplexnímu pohledu na postavení Islandu v rámci integrující se Evropy v minulosti i v současnosti. Následují kapitoly, které analyzují faktory vysvětlující zdrženlivý přístup k evropské integraci a stanoviska politických elit a veřejnosti. Závěr je zaměřen na zhodnocení současného uspořádání vztahů mezi Islandem a EU a potenciálních přínosů islandského členství v EU.

acase@tulane.edu / The Louisiana coast is an invaluable asset to the nation's human, economic, and ecological welfare. However, due to the combined effects of coastal erosion, subsidence, and sea level rise, Louisiana is losing on average 25 km2 of its valuable coastal wetlands per year. Terrebonne Bay and the associated Lafourche deltaic lobe headland is a critical section of this coast for wetlands and infrastructure protection and restoration in the State’s Master Plan. Historical imagery and bathymetry clearly show the rapid transgression and erosional degradation of both sets of headland-flanking barrier island shorelines due to wave attack and relative sea level rise in the past 150 y. The focus of the present study is a barrier island system: an ocean-fronting modern- barrier shoreline (Timbalier) and a paleo-deltaic headland barrier arc (Terrebonne) inland of the active barrier. The evolution of the modern barrier arc is closely tied to the shallow geologic framework over which it is transgressing, and specifically the sand re-activation capacity of the antecedent geology once erosional forces are introduced. To understand the evolution of these barrier systems and how to address their protection and re-nourishment, it is important to quantify (1) the depositional facies geometry and (2) the volume of sand in these back-barrier sandy lithosomes. Here we present new observations from CHIRP sub-bottom seismic, multibeam bathymetry, and surface grab and vibracore sampling in an effort to quantify the sediment availability within the underlying geologic framework and reconstruct the geomorphic evolution of these barrier shorelines. Observations of sandy units agree with results from Kulp et al. (2005), who showed the presence and extent of sandy lithofacies within 3 m of the surface proximal to the Raccoon Pass tidal-inlet. We provide evidence to suggest that this sand is an important potential resource for the longevity of proximal sandy barrier islands as transgression continues. / 1 / Daniel Culling

The paleomagnetic history of the volcanic rocks of Easter Island was investigated using standard paleomagnetic techniques. The remanent magnetization of 673 specimens from the three volcanic episodes recognized on the island were measured using a spinner magnetometer. Inclinations, declinations and virtual geomagnetic poles were calculated for each flow. The majority of the samples were collected from the youngest episode, the Terevaka volcanics, which represents activity from the last 200, 000 years. The 65 flows from the Terevaka episode were used to study the Brunhes epoch on Easter Island. A mean geomagnetic pole was located at 87.4°N latitude and 204.2°E longitude. With its oval of 95% confidence, this includes the present geographic pole, as expected for such young rocks. Secular variation, expressed by the angular deviation of the mean virtual geomagnetic pole, was obtained for the Terevaka samples, This value, 12.8° with 95% confidence limits of 14.9° and 11.2°, is compared to other values for Brunhes age rocks. It appears to fit well onto a calculated model for the variation of angular dispersion with site latitude. It also can be related to an anomalously low region of secular variation found in the central Pacific. / Graduation date: 1974

Abstract Case study on the dock construction of Tungsha Island has been performed in the thesis. Evaluation of the optional location as well as the dock style was first studied according to the cost and the convenience to approach. The construction process and the environmental impact to the coastal line stability and marine ecology are also evaluated.

Thesis (M.A.)--Gu li zheng zhi da xue wai jiao yan jiu suo. / Cover title. Reprint ed. Includes bibliographical references.

Inaug.-Diss.--Münster. / Vita. Bibliography: p. [175]-178.

Inaug.-Diss.--Halle. / Vita.