3,344 research outputs found

    Contour measurement system

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    A measurement system for measuring the departures from a straight line of discrete track sections of a track along a coal face in a mine employing a vehicle having a pair of spaced wheel assemblies which align with the track is presented. A reference arm pivotally connects between the wheel assemblies, and there is indicating means for measuring the angle of pivot between the arm and each of the wheel assemblies. The length of the device is less than the length of a track section, and thus when one of the wheel assemblies is on one track section and one is on an adjoining track section, the sum of the indicated angles will be indicative of the angle between track sections. Thus, from the length of a track section and angle, the departure of each track section from the line may be calculated

    Root Cause Analysis and Method Development of Calorimetry Experiments

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    First year chemistry students learn a broad range of concepts that are also proven out in the lab environment. These concepts are a basis for a solid foundation for future chemistry learning. When the lab experiments don’t produce the expected results, students understanding in these concepts diminish and overall confidence and grades suffer. Our project details the root cause analysis and subsequent method development work for two experiments related to calorimetry; heat of solution and freezing point depression. The team sought to refine these experiments after finding that many of the students were unable to generate the expected results for the experiment. The focus of the work was twofold; 1) determine the cause of the failures and 2) recommend and validate changes to the current experiments. Isolating and mitigating the issues impacting these experiments should provide future students with a deeper understanding of chemistry and how it is applied to various situations

    Migration and return migration: A new look at the Eastern Kentucky migration stream

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    Most studies of the economics of migration have implicitly assumed that migratory streams are homogeneous. However, migratory streams from one region to another consist of two distinct streams: a stream of first-time migrants and a stream of return migrants moving back to their area of origin. In fact, a substantial proportion of all U.S. migration is return migration, 14 percent from 1955 to 1960 [15,p. 3]. Moreover, in states with histories of substantial out-migration, an even greater proportion of in-migrants are returnees, 35 .4 percent between 1955 and 1960. Yet, economists have largely ignored return migration in their attempts to explain changes in the labor force. Studies of return migration may have several important implications. If first-time migrants and return migrants have different characteristics, then studies which distinguish the two streams may provide more reliable insights into the determinants of migration. Comparison of the characteristics of return migrants with migrants who remain may provide guidance for the design of programs to facilitate successful migration. Knowledge of the causes and characteristics of return migration may provide additional understanding of the effects of migration on the communities of origin and destination

    Equity Must Accompany Economic Growth for Good Health

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    K. Srinath Reddy discusses a new research study by S. V. Subramanian and colleagues that found no strong evidence of recent economic growth in India being associated with a reduction in child undernutrition

    An Analysis of Mothers and Fathers Who Kill Their Children: Examining Offense Characteristics and Adjudication Outcomes

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    Filicide is a crime that conflicts with nature in that it undermines our genetic fitness and parental investment and defies attachment theory. Yet, despite the crime of filicide being counterintuitive, the media frequently reports on cases involving parents who have killed their own child. This analysis involves examining open-source cases of 100 mothers and 100 fathers who have killed their children. Analyses will compare the differences between mothers and fathers in terms of offender and victim demographics, as well as mental health and criminal histories. Offense characteristics and adjudication outcomes will also be examined.https://scholarworks.waldenu.edu/symposium2019/1003/thumbnail.jp

    The determinants of wage increases in new manufacturing plants in rural areas

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    The research reported here was designed to explain variation in wage changes of new industrial plant employees. Following the theoretical perspectives of Gotsch, wage changes were hypothesized to result from a combination of employee household, community, and plant characteristics. The greatest difficulty in this study was choosing appropriate operational measures for independent variables that were highly correlated with these theoretical factors.Southern journal of agricultural economics, July 1981, p. 84-88Includes bibliographical reference

    Location determinants of manufacturing industry in rural areas

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    The spatial distribution of economic activity has been the subject of much theoretical study during the last 150 years. The two-state study which provides primary evidence for this article is, to the authors' knowledge, the first attempt to analyze statistically the determinants of industrial location in rural communities with an explicit objective of more enlightened public action at the local, state, and federal levels
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