Digital Commons Network^™

Spatial And Temporal Variations Of Cloud-To-Ground Lightning In Southern Michigan, Michael A. Crimmins

Masters Theses

Lightning has a profound impact on many aspects of modern day society. Understanding its temporal and spatial distributions is fundamental in learning to coexist with its destructive power. This study surveyed the spatial and temporal distribution of cloud-to-ground lightning over southern Michigan using data provided by the Detroit Edison Company. Flash density and 'lightning day' maps were produced for every year of the 1985 to 1995 study period and then averaged to determine long term trends. A temporal analysis determined the distribution of lightning from the inter-annual down to the diurnal scale.

The spatial analysis indicates both deficiencies in the …

Spatial Analysis Of Agricultural Cucurbita Sp. Varieties In The Eastern Broadleaf Province, Kathleen M. Baker

Masters Theses

The purpose of this research was to explain and quantify twentieth century agricultural distributions of the genus Cucurbita in the United States to determine the effect of temporal changes in economic utilization and a variety of historical, environmental and social circumstances on those distributions. Geographic information system (GIS) methods were combined with statistical software techniques to analyze the spatial and temporal trends of pumpkin and squash growth in one region (the Eastern Broadleaf Province, as defined by Bailey) of the United States from 1982-1992.

Counties with fewer frost free days, later spring frosts, more accumulated growing degree units throughout the …

The Contemporary Migration Of Russian-Germans From Russia And Kazakhstan To Germany: A Case Study In Migration Geography, Jacquelin K. Tylzynski

Masters Theses

Since the collapse of communism in Central Europe and the former Soviet Union in the late 1980's/early 1990's over two million ethnic Germans have migrated to Germany (predominantly from Russia and Kazakhstan). Ethnic Germans are descendants of Germans who migrated to Central Europe and to Russia centuries ago who are returning to their historic roots since they have been allowed to leave. The reason ethnic Germans are migrating to Germany stems from a strange law written into West Germany's post-World War II constitution (in 1949) that promised ethnic Germans and their descendants the "right to return" to Germany; however, the …

Spatial And Ethnic Patterns Of Real Estate Control Affecting Upward Mobility Of Immigrants In A Nineteenth Century Industrial Community, Debra S. Alfonso

Masters Theses

The subject of immigrant success has previously been analyzed in the context of ethnic characteristics, individual heroism, worker solidarity, and advancement of industrialization. Most immigrants start at the bottom of the social-economic ladder. The mechanisms of advancement vary depending on both ethnic values and the constraints of the socioeconomic system. The key variable is normally thought to be advancing occupational status.

The problem addressed is how did recent immigrants to a 19th century steel-town obtain home ownership and advancement in spite of declining industrial wages. Using a GIS system to link and analyze geographic and historical records I was able …