Thesis (Ph. D.)--University of Wisconsin--Madison, 1966. / eContent provider-neutral record in process. Description based on print version record. Includes bibliography.

<p>This thesis consists of three parts. The first part (Chapter 3) is to achieve a comprehensive understanding of the interrelationships among migration, the evolution of the settlement system, and the socioeconomic development in Taiwan over the past four hundred years (1600-1990), with an emphasis on the impacts of developmental strategy and government policy. The major finding is that the migration process in Taiwan appears to be highly responsive to the changing socioeconomic context.</p> <p>The second part (Chapter 4-6) involves the studies of (1) life-time migrations and (2) 1985-90 primary, return, and onward migrations of the labor force in Taiwan, based on the 1990 Taiwanese census. The main theme of these analyses is to assess the responsiveness of labor migration to the labor market forces and to the economic restructuring and globalization that took place in the 1980s. The main findings are (1) that primary labor migration played a much greater role than did onward and return labor migrations in affecting the transfers of human resources and (2) that the three types of labor migration responded in a rational way to the effects of patriarchal value system, educational attainment, location-specific capital, market forces, and economic restructuring and globalization.</p> <p>The third part (Chapter 7) is devoted to the analysis of the behaviors of fast repeat labor migration in Taiwan, based on the linked migration data. The main findings are (I) that the most important factors of fast repeat migrations turned out to be the chronicity and patriarchal ideology, (2) that those with a limited labor market knowledge and an unsuccessful job search are more prone to make a fast return migration, and (3) that the more experienced and more successful previous migrants are more prone to make a fast onward migration.</p> / Doctor of Philosophy (PhD)

No description available.

<p>The main objectives of this study are to use optically stimulated luminescence (OSL) to date quartz samples collected from dune ridges on the St. Joseph Peninsula, to test the feasibility of dating quartz from heavy mineral layers as a solution to the problems associated with the low luminescence signal inherent to young samples and to use the natural residual thermoluminescence (NRTL) signal in littoral zone quartz to study sediment transport in the nearshore zone.</p> <p>All samples were collected from the St. Joseph Peninsula, part of a barrier island chain that stretches across the northern Gulf of Mexico. Dune ridge samples and offshore samples were collected from various locations along the length of the peninsula.</p> <p>Frequency histograms, showing the distribution of equivalent doses (D_E'S), were plotted for each of the dune ridge samples. Several samples have large D_E'S relative to their D_E distributions. There are two ways of obtaining grains with large doses and, therefore, large D_E'S. The first is by proximity to other grains that are delivering high doses. The second is by incomplete zeroing. These possibilities are explored.</p> <p>Based on the geometry of the ridges on the peninsula, the youngest dune ridges should be closest to the gulf side of the peninsula and the oldest ridges should be on the bay side. This is tested by obtaining OSL dates for a series of samples from the north end of the peninsula.</p> <p>Two samples from storm deposits of a known age were collected. Results show that it is possible to date young samples by using quartz collected from heavy mineral layers. The high radiation dose delivered to the quartz by the heavy minerals makes it possible to obtain accurate dates on "modem" deposits.</p> <p>The natural residual thermoluminescence (NRTL) signal of the littoral samples was analysed for trends related to grain size and sample position relative to longshore drift. This study shows that NRTL is a useful tool in studies of sediment transport in the nearshore and can be used as an alternative to other sediment tracing methods.</p> <p>The results of this study are a significant contribution to both luminescence dating and coastal geology.</p> / Master of Science (MSc)

Hydrogeologists using the partition coefficient, or K\(_d\) approach, to quantify attachment (sorption and / or ion exchange) of heavy metal(s) in aquifers have expressed reservations about its oversimplification of the geochemistry involved, potentially undermining predictions of contaminant fate and therefore jeopardising effective remediation efforts. The aims of this project were to determine the validity of the K\(_d\) approach for the Permo-Triassic sandstone – a common aquifer type worldwide – and to propose a better way of quantifying attachment for metal ions. After characterising a sample of Permo-Triassic sandstone by way of a suite of batch experiments, the geochemical code PHREEQC was used to interpret the results using simulations incorporating both surface complexation theory and ion exchange. These demonstrated, by approximately matching attachment isotherm plots of Zn, that the model was a robust representation of the sandstone. This model was then adapted to simulate transport of Zn through a representative aquifer in a range of conditions to determine the potential importance of sorption in metal transport. The results confirmed the variability in the system with regard to pH influences, the fluctuating dominance of ion exchange and sorption, the presence of competing ions, and the resultant outcomes for Zn transport. It is expected that these results are similar for metals with chemistry similar to that of Zn.

The aim of this research was to provide a basis for quantifying the ability of red sandstone to oxidise dissolved organic carbon (DOC), and determine if results of experiments on synthetic minerals can be applied to geological materials. Ascorbic acid (H\(_2\)A) was used as a probe. Preliminary experiments revealed that it can reductively dissolve sandstone hematite and Mn oxide as research on synthetic minerals had previously shown. Sorption of H\(_2\)A to sandstone was similar to that seen for synthetic hematite (a two-slope linear isotherm). Anoxic batch experiments were undertaken under biotic and abiotic conditions. Release of Fe and Mn was found to be dependent on the concentration of H\(_2\)A and pH. Decrease in H\(_2\)A concentration exceeded increase in Fe and Mn concentrations corrected for sorption, and this was modelled by sorption of both ascorbate and dehydroascorbic acid. The rate of H\(_2\)A oxidation was higher in biotic experiments than in abiotic experiments, probably due to the differences in pH rather than bacterial presence. The rate of ascorbic acid oxidation by natural oxides was higher than found by previous researchers for synthetic hematite. This result was not expected, and only in part can be ascribed to the effect of Mn oxides. However, the mechanism of reductive dissolution determined by the synthetic mineral studies appear relevant also to the sandstone system. Many questions remain but the study shows that the sandstone provides a significant natural oxidative attenuation capacity and that the results of experimentation on synthetic minerals can only be applied qualitatively.

No description available.

This thesis examines a bayhead bar in the western end of the Lake Ontario Basin with the purpose of determining the dominant factors in the process-response model. From former field examination of the bar, and through the collection of deep drill cores, an attempt has been made to establish former processes which acted in the area of the present bar, Presently, field study, especially through the collecting of drill cores, sediment samples and wind data and by logging of wave data and longshore movement, has led to an attempt to establish the effect of present processes acting on the bar. / Thesis / Bachelor of Arts (BA)

The aim of this diploma thesis is The teaching of region-general science on the Klatovsko example. In the first part of the work is the theoretical introduction composed from special literature which describes Klatovsko in many views. The region is characterized, defined and divided to the sub regions; either physical-geographical and socio-economical data as well as environment-conservation are reviewed in the theoretical part of this thesis. The work is not focused only on range of general science but also logical attaches it with information from regional geography. This data together gives allover review on the resolved region. The necessary part of this diploma these is own resolving which is based on seeking for knowledge about the region in 4th and 5th classes of elementary schools. The little spread method of mental mapping was used for research and the method was extended with questionary investigation. The results of own resolving are discussed and interpreted by suitable graphs. The teaching-utilities for either region-general science and geography were created on base of obtained results. The learning texts are prepared for direct-teaching of pupils and connected working sheets for reviewing their knowledge and quality-control of teaching were attached. As an alternative learning-method the funny projects are provided with this work. These projects are useful for teaching of Klatovy region.

No Abstract Provided / Thesis / Bachelor of Arts (BA)