PREDATOR-PREY SYSTEMS IN PEST MANAGEMENT

The use of chemical pesticides frequently causes minor pests to become serious problems by disturbing the natural controls that keep them in check. As a result, it is possible to suffer heavier crop losses after pesticides are introduced than before their introduction. Efficient use of pesticides requires complete biological modeling that takes the appropriate predator-prey relationships into account. A bioeconomic model is introduced involving three key species: a primary target pest, a secondary pest, and a natural enemy of the secondary pest. Optimal decision rules are derived and contrasted with myopic decision making, which treats the predator-prey system as an externality. The issue of resistance in the secondary pest is examined briefly.Crop Production/Industries,

Men of Color: A Role for Policymakers in Improving the Status of Black Male Students in U.S. Higher Education

This report calls for greater involvement by federal and state policymakers and others to improve black male college readiness and completion. It presents policy-relevant trends concerning black male college students, highlights promising practices on campuses across the country, and proposes suggestions for policymakers and other stakeholders

Black Male Student Success in Higher Education: A Report From the National Black Male College Achievement Study

The report presents insights from interviews with successful male African-American college students, highlighting factors that helped them succeed in a range of contexts: getting to college, choosing colleges, paying for college, transitioning to college, matters of engagement, and responding productively to racism

They (Don't) Care About Education: A Counternarrative on Black Male Students' Responses to Inequitable Schooling

Focus group interviews and systematic content analysis of 304 essays written by black male undergraduates refute the dominant message that black men do not care about education. On the contrary, these students aspire to earn doctoral degrees in education despite acute understanding that the education system is stacked against them. The analysis asks what compels that dedication

GENDER'S ROLE IN MANUSCRIPT ACCEPTANCE: SEX IN THE JOURNAL

Women authors fare poorly at the hands of referees in some economics journals, especially when the review process is not blind. Using data on the 155 manuscripts submitted to the NJARE for publication during the period 1984-88, we found no evidence of differential referee acceptance rates for manuscripts with female and male lead authors.Teaching/Communication/Extension/Profession,

Black Male Student-Athletes and Racial Inequities in NCAA Division I College Sports

The purpose of this report is to make transparent racial inequities in NCAA Division I college sports. Specifically, the authors offer a four-year analysis of Black men's representation on football and basketball teams versus their representation in the undergraduate student body on each campus. The report concludes with recommendations for the NCAA and commissioners of the six major sports conferences, college and university leaders, coaches and athletics directors, journalists, and Black male student-athletes and their families

The Plains of Mars, European War Prints, 1500-1825

Over fifty original prints by renowned artists from the sixteenth through the early nineteenth century, including Albrecht Dürer, Lucas Cranach, Théodore Géricault, and Francisco de Goya, among many others, are featured inThe Plains of Mars: European War Prints, 1500-1825. On loan from the Sarah Campbell Blaffer Foundation at the Museum of Fine Arts, Houston, the works of art included in this exhibition examine the topics of war and peace, propaganda, heroism, brutal conflicts, and the harrowing aftermath of battle. Spanning from the Renaissance to the Romantic periods and encompassing a wide geographic scope including Italy, Germany, France, Spain, the Low Countries, England, and North America, the prints depict triumphant Renaissance soldiers, devastating scenes of violence, and satirical caricatures of political figures. Also on display is Goya’s compelling “Disasters of War” series, completed in response to the brutality of the Spanish War of Independence. Goya’s prints serve as a powerful testament to the horrors faced by both soldiers and civilians. Under the direction of Professor Felicia Else and Shannon Egan, Melissa Casale ‘19 and Bailey Harper ‘19 have researched and written didactic labels, catalogue essays, and created an interactive digital interface to complement the exhibition. Together, Melissa and Bailey will lead public tours of the exhibition. A Gallery Talk by Prof. Peter Carmichael will draw connections between the depictions of warfare on view in the Gallery with representations of the American Civil War. James Clifton, Director of the Sarah Campbell Blaffer Foundation at the Museum of Fine Arts, Houston, will be delivering a lecture in conjunction with the exhibition. Dr. Clifton, who also serves as curator of Renaissance and Baroque painting at MFAH, curated the exhibition in its first iteration and wrote the exhibition catalogue (published by Yale University Press). Dr. Clifton’s lecture not only will provide an overview of the exhibition, but also will focus on the concept of “mediated war.” A full-color catalogue with images and essays by Bailey Harper ’19 and Melissa Casale ’19, under the supervision of Profs. Felicia Else and Shannon Egan, is planned to accompany the exhibition.https://cupola.gettysburg.edu/artcatalogs/1028/thumbnail.jp

MUSE CSP: An Extension to the Constraint Satisfaction Problem

This paper describes an extension to the constraint satisfaction problem (CSP) called MUSE CSP (MUltiply SEgmented Constraint Satisfaction Problem). This extension is especially useful for those problems which segment into multiple sets of partially shared variables. Such problems arise naturally in signal processing applications including computer vision, speech processing, and handwriting recognition. For these applications, it is often difficult to segment the data in only one way given the low-level information utilized by the segmentation algorithms. MUSE CSP can be used to compactly represent several similar instances of the constraint satisfaction problem. If multiple instances of a CSP have some common variables which have the same domains and constraints, then they can be combined into a single instance of a MUSE CSP, reducing the work required to apply the constraints. We introduce the concepts of MUSE node consistency, MUSE arc consistency, and MUSE path consistency. We then demonstrate how MUSE CSP can be used to compactly represent lexically ambiguous sentences and the multiple sentence hypotheses that are often generated by speech recognition algorithms so that grammar constraints can be used to provide parses for all syntactically correct sentences. Algorithms for MUSE arc and path consistency are provided. Finally, we discuss how to create a MUSE CSP from a set of CSPs which are labeled to indicate when the same variable is shared by more than a single CSP.Comment: See http://www.jair.org/ for any accompanying file

Toxicity studies of Coolanol 15 Final report, Jan. - Sep. 1965

Toxicity studies of synthetic fluid coolant for manned spacecraft heat transfer system