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Sustenance Organization and the Repopulation of Nonadjacent Nonmetropolitan Counties in the State of Texas, 1970-1980

Description: From 1970 to 1980 nonadjacent counties in Texas experienced an increase in net migration of 9.4 percent, significantly different from the 11.8 percent decrease experienced the previous decade. This study utilized the ecological perspective to study this redistribution pattern in Texas' nonadjacent counties between 1970 and 1980. Sustenance organization, defined as sustenance differentiation (the functional organization of sustenance activities and the dispersion of workers across these functional categories) and the mode of sustenance organization (the combinations of various sustenance activities) was identified as the primary independent variable. In addition, three secondary independent variables were included in the analysis (population per square mile, metropolitan dominance, and the percent who work outside the county of residence).
Date: May 1984
Creator: Nissen, Timothy E. (Timothy Edward)
Partner: UNT Libraries

Internal Migration in the United States: Its Components and Trends

Description: This report discusses of internal migration trends in the U.S. such as the migration of people from rural areas to cities and the growth of suburbs along with associated economic consequences, social struggles, and possible solutions to alleviate some of these problems. Three groups migrations are specifically discussed (Dust Bowl farmers becoming transient workers in the 1930s, Appalachian families moving out of the mountains in the 1940s-1960s, and southern African-Americans moving to the north especially to urban areas in the 1950s-1960s).
Date: February 5, 1971
Creator: Mitrisin, John D.
Partner: UNT Libraries Government Documents Department

The Ion Velocitron

Description: This report analyzes the separation of ions using the velocity of the ion measured through a long evacuated drift tube.
Date: January 27, 1947
Creator: Cameron, A. E. & Eggers, D. F.
Partner: UNT Libraries Government Documents Department

Improving the Long-term Performance of PVC Compositions

Description: PVC are extensively applied in many fields, such as cables, pipes, vehicles, shoes, toys and infusion bags. Generally, plasticizers are blended with PVC to improve the ability of process in industrial production; however, the toxic plasticizers will gradually migrate to the surface of products and such a leakage results in brittleness of plasticized PVC and environmental pollution. In other words, humans are frequently exposed to the potential risks. According to previous researches, cross-linked PVC was proved that it was able to hinder the migration of plasticizer. Thus, in this research, we selected some commercially used cross-linking agents and employed six different tests based on mechanical, tribological and microscopy analysis in order to seek the best solution against plasticizer migration. Thus, we expected to develop a cross-linked flexible PVC which performed improved long-term performance and extended lifetime.
Date: December 2016
Creator: Yang, Yu Chia
Partner: UNT Libraries

Assessment of Smolt Condition for Travel Time Analysis Project, 1987-1997 Project Review.

Description: The assessment of Smolt Condition for Travel Time Analysis Project (Bonneville Power Administration Project 87-401) monitored attributes of salmonid smolt physiology in the Columbia and Snake River basins from 1987 to 1997, under the Northwest Power Planning Council Fish and Wildlife Program, in cooperation with the Smolt Monitoring Program of the Fish Passage Center. The primary goal of the project was to investigate the physiological development of juvenile salmonids related to migration rates. The assumption was made that the level of smolt development, interacting with environmental factos such as flow, would be reflected in travel times. The Fish Passage Center applied the physiological measurements of smolt condition to Water Budget management, to regulate flows so as to decrease travel time and increase survival.
Date: December 1, 1997
Creator: Schrock, Robin M.; Hans, Karen M. & Beeman, John W.
Partner: UNT Libraries Government Documents Department

Demographic and Social Psychological Factors Affecting Migration in Eight United States Cities

Description: In this investigation, selected demographic and social psychological factors affecting migration within eight United States cities are examined. More specifically, the study examines migration in terms of previous neighborhood satisfaction, perceived initial attraction of present neighborhood, present neighborhood satisfaction, family life cycle, residence tenure, race, sex, income, and education. The data for this investigation are taken from the 1975 National Crime Survey Attitude Sub-Sample Files. Using length of residence to define migration status, 2,047 migrants and 1,928 non-migrants comprise the sample for this investigation. Zero-order and multiple correlation measures are utilized in the analysis of migration in terms of the previously mentioned variables.
Date: December 1982
Creator: Landua, Paul Dwight
Partner: UNT Libraries

Determinants of Refugee Production: an Exploratory Analysis

Description: The issue of refugees and the factors which result in forced migration are of growing importance. Currently, one in every 120 people is living outside of his or her nation of origin by force. There appears to be no end in sight to this situation. This paper seeks to examine conditions within a nation which contribute to the production of refugees. Using a model based on Clark's (1989) early warning system, this paper examines both proximate and root causes of refugee migration. The findings suggest that human rights violations have a proximate causal relationship to refugee production. High levels of state autocracy, low per capita energy consumption, larger rural populations, and a recent negative net migration have an associative relationship to refugee production. Further studies are needed to examine the interrelationship between the proximate and root conditions and their effect on refugee flow.
Date: August 1998
Creator: Zottarelli, Lisa Katherine
Partner: UNT Libraries

Spanish surname recent migrant families: the relationships of life cycle, family status, socioeconomic status, and housing

Description: the problem with which this investigation deals is that of internal migration among Mexican-Americans living in the Southwest. Four factors, life cycle, family status, socioeconomic status, and housing and their effects on migration are considered.
Date: August 1976
Creator: Alexander, Tristan John
Partner: UNT Libraries

Reconstructing Identity through Urban Community Agriculture: How Refugees Confront Displacement, Food Insecurity, and Othering through Community Farming

Description: Ethnic and religious conflict, and the deepening of capitalism have led to global diaspora at unprecedented levels. The United Nations High Commissioner for Refugees reported that as of 2015, 1 in every 122 persons worldwide were either a refugee, internally displaced, or seeking asylum. The U.S. currently admits the largest number of refugees worldwide. However, policies fail to reflect the multitude of elements that constitute successful resettlement. Moreover, many refugees come from farming backgrounds and are forced to migrate to a landless urban environment, where their skill sets may not be utilized and farm land is not available. I argue that existing resettlement processes are embedded in logics and practices that alienate humans from nature and from each other through competition, isolation, and placeless environments. Through an exploration in concepts of urban agriculture, place-making, identity, and otherness, and illuminating the experiences of resettled refugees involved in a community gardening project in Fort Worth, Texas, show how the urban refugee garden provides the individual a space to narrate an identity, and to resist industrial agriculture and labor outside their industry. Exploring best practices in resettlement should be a priority to governments, politicians, and communities involved in the process and highlight the reasons to advocate these types of resettlement alternatives.
Date: May 2017
Creator: Griffin, Marinda
Partner: UNT Libraries

Migration of Uranium Process Wastes from the Uranium-233--Thorium-232 Cycle

Description: With the advent of fuel loadings of uranium-233 in the Shippingport Reactor, it has become important to understand the migratory behavior of uranium. The purpose of this study is the determination of the parameters influencing the migration of uranium(VI), the most likely chemical form of uranium to be mobilized from a repository. Samples of rhyolite tuff were used to measure the absorption coefficients of solutions of uranium (VI) in ground waters. In addition, columns of tuff were used to measure the elution behavior of uranium (VI) at various conditions of pH, uranium (VI) concentration, and flow saturation. These results indicate that there are several elution peaks with values of Kd between 35 and 120. This behavior is not the same as that of Plutonium(VI) on tuff; and the experimental results to date have not revealed the reason for this difference. Values of Kd in this range imply that geological containment would be difficult in strata of this type. It may be possible to find more retentive strata than tuff. Rocks containing reducing components are the most likely candidates and further investigation is urgently needed if the uranium-233-thorium cycle is to be widely used.
Date: 1979?
Creator: Fried, Sherman; Sabau, Carmen; Hines, John & Friedman, Arnold
Partner: UNT Libraries Government Documents Department

The Magnificent Journey.

Description: The annual run of Northwest salmon--from the vast Pacific Ocean to the mountain streams where their lives began--is one of Nature`s most awe-inspiring events. Now that modern science has discovered some of the salmon`s secrets, their journey seems even more miraculous. So unlikely is the survival of a single returning salmon that Nature compensates heavily. Of the other 3,000 to 7,000 eggs in a nest, only one spawning pair, on average, will make it back. Too much or too little water at hatching can wipe out great swarms of young fish life. Bigger fish, bears, seals--all take their share of salmon. Nature allows for these natural events. But Nature alone cannot make up for what people have done. Dams in the Columbia River Basin have blocked huge areas of the wild salmon`s spawning grounds. Roads and towns sprouted up along rivers and streams. Logging and farming practices fouled rivers and creeks. So did pollution from the cities. And it became too easy to catch fish. Salmon runs became smaller and smaller. Some types of salmon disappeared forever. Having nearly destroyed the salmon, people are now coming to their rescue. Still, important runs of Northwest native salmon are in real danger of extinction. Much remains to be done. This brochure presents a close look at the life of a wild salmon, Oncorhynchus tshawystcha.
Date: January 1, 1995
Creator: United States. Bonneville Power Administration.
Partner: UNT Libraries Government Documents Department

Upstream Migration of Pacific Lampreys in the John Day River : Behavior, Timing, and Habitat Use : Annual Report 2000.

Description: Historic accounts and recent observations of Pacific lampreys (Lampetra tridentata) at mainstem Columbia River dams indicate the number of Pacific lampreys migrating upriver has decreased dramatically over the last 60 years. Consequently, state, federal, and tribal governments have recently expressed concern for this species. Little is known about the biological and ecological characteristics of habitats suitable for upstream migrating Pacific lampreys. If rehabilitation efforts are to be done effectively and efficiently, we must gain knowledge of factors limiting survival and reproduction of Pacific lampreys. From data gathered in the first year of this project, we can for the first time, describe the timing, extent, and patterns of movements for Pacific lampreys. We have tested methods and gained information that will allow us to refine our objectives and approach in future work. Knowledge of behavior, timing, and the resulting quantification of habitat use will provide a means to assess the suitability of overwintering and spawning habitats and allow the establishment of goals for recovery projects. Further research is necessary, including multiple years of data collection, tracking of movement patterns through the spawning season, and more rigorously examining habitat use.
Date: April 12, 2001
Creator: Bayer, Jennifer M.; Seelye, James G. & Robinson, T. Craig
Partner: UNT Libraries Government Documents Department

Evaluation of the 1994 Predictions of the Run-Timing of Wild Migrant Yearling Chinook in the Snake River Basin.

Description: Since 1988, wild salmon have been PIT-tagged under programs conducted by the National Marine Fisheries Service, Idaho Department of Fish and Game, Oregon Department of Fish and Game and the U.S. Fish and Wildlife Service. The detection of tagged individuals at Lower Granite Dam provides a measure, of the temporal and spatial distribution of the wild populations. PIT Forecaster was developed to take advantage of this historical data to predict the proportion of a particular population which had arrived at the index site in real-time and to forecast elapsed time to some future percentile in a migration. This report evaluates the performance of the Least Squares (LS) method and the Synchronized historical pattern matching (SYNC) method used in the PIT Forecaster and two other possible methods of prediction reminiscent of methods recommended by the Fish Passage Center (FPC). Alternative No. 1 bases predictions on the historical proportion of PIT-Tags recovered in a specific year and Alternative No. 2 uses the historical cumulative distribution of smolt predicted of a previous season. Over the entire 1994 season, the LS method had the best prediction performance for both aggregate and individual streams. However, for the first half of the season, Alternative No. 1 was clearly a better predictor. This performance deteriorated for the last half of the season, and the LS method improved prediction for aggregate streams and for the individual streams. The algorithms used by PIT Forecaster provide a better prediction as the season progresses. For the first half of the season, Alternative No. 1 did very well for both index years selected. For the 1995 season, Alternative No. 1 will be combined with the LS method to create an improved predictor.
Date: February 1, 1995
Creator: Townsend, Richard L.; Westhagen, P.; Yasuda, D. & Skalski, J.R.
Partner: UNT Libraries Government Documents Department

Core flow experiment protocol

Description: This letter report describes the current status of the core flow through apparatus and describes the protocol and test matrix to be followed during the initial experimental stage of radionuclide transport studies in the Integrated Testing task.
Date: December 1, 1997
Creator: Viani, B.E. & Martin, S.I.
Partner: UNT Libraries Government Documents Department