The Detection of Salmonellae from the Big Sioux River Using Fluorescent Antibody Technique and Improved Cultural Methods

The Water Quality Act of 1965 was passed with the intention of enhancing the quality and value of water resources and establishing a national policy for the prevention, control, and abatement of water pollution. The Federal Water Pollution Control Administration has issued guidelines to be followed by the States in developing standards for interstate waters. As an interstate stream, the Big Sioux River must conform to the Federal requirements. Pollution in South Dakota is derived principally from agricultural, municipal and industrial wastes. Dairy, meat processing and mining industries are the most important sources of industrial wastes. Bacterial pollution is the contamination of the water by bacteria, most significantly the pathogenic bacteria such as salmonellae. Coliform densities have been traditionally used as an indication of pathogenic bacteria in the water. Only a limited number of workers have done studies showing the presence of salmonellae in surface waters but none have done studies in South Dakota. This is due to the reluctance of working with a pathogenic organism, the low numbers present in the water and the inadequate methods of isolation. The purpose of this study was to show the presence of salmonellae in the Big Sioux River, improve the methods for their isolation and develop a method for their quantitation

The behavioral and evolutionary roots of dynamic capabilities

The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI linkAlthough the dynamic capabilities framework has proved important for explaining long-term competitive advantage, some scholars have attacked it as lacking theoretical underpinnings. In this paper, we clarify the lineage of the “dynamics” in the dynamic capabilities framework from the non-strategic model of Cyert and March to the dynamic evolutionary theory of the firm in Nelson and Winter that enabled the initial breakthrough of Teece, Pisano and Shuen. We explain that the theoretical schism in dynamic capabilities between the tradition of Eisenhardt and Martin and that of Teece and colleagues can be traced to their relative emphasis on behavioral versus evolutionary theories. Finally, we provide a brief overview of implications for emergent topics and empirical research, along with ideas for future research

In Sickness and in Wealth:Psychological and Sexual Costs of Income Comparison in Marriage

As the percentage of wives outearning their husbands grows, the traditional social norm of the male breadwinner is challenged. The upward income comparison of the husband may cause psychological distress that affects partners’ mental and physical health in ways that affect decisions on marriage, divorce, and careers. This article studies this impact through sexual and mental health problems. Using wage and prescription medication data from Denmark, we implement a regression discontinuity design to show that men outearned by their wives are more likely to use erectile dysfunction medication than their male breadwinner counterparts, even when this inequality is small. Breadwinner wives suffer increased insomnia/anxiety medication usage, with similar effects for men. We find no effects for unmarried couples or for men who earned less than their fiancée prior to marriage. Our results suggest that social norms play important roles in dictating how individuals respond to upward social comparisons. </jats:p

The genetic architecture of the human cerebral cortex

The cerebral cortex underlies our complex cognitive capabilities, yet little is known about the specific genetic loci that influence human cortical structure. To identify genetic variants that affect cortical structure, we conducted a genome-wide association meta-analysis of brain magnetic resonance imaging data from 51,665 individuals. We analyzed the surface area and average thickness of the whole cortex and 34 regions with known functional specializations. We identified 199 significant loci and found significant enrichment for loci influencing total surface area within regulatory elements that are active during prenatal cortical development, supporting the radial unit hypothesis. Loci that affect regional surface area cluster near genes in Wnt signaling pathways, which influence progenitor expansion and areal identity. Variation in cortical structure is genetically correlated with cognitive function, Parkinson's disease, insomnia, depression, neuroticism, and attention deficit hyperactivity disorder

Robin Hood Under the Hood

This is the replication packet for Study 2 in the 2010 Organization Science paper by Francesca Gino and Lamar Pierce. This replication packet uses original electronic data as sent by Francesca Gino to Lamar Pierce in 2007. The electronic data were built from paper and pencil based studies, and the original answer sheets no longer exist. The electronic data are exactly as received with one exception: a small number of observations where the respondent filled in the "ID" space with a Social Security or Visa Number have been deidentified, and are noted within the dataset. This replication packet was created by Lamar Pierce and sent in this exact form to INFORMS on July 24 2023 for independent validation, at the request of Lamar. It was also sent to one of the organizers of the many co-authors project on August 21 2023. I welcome any thoughts or feedback on the study, its results, or its data