Reflections on Frankfort Rally

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A framework for the natures of negativity in introductory physics

Mathematical reasoning skills are a desired outcome of many introductory physics courses, particularly calculus-based physics courses. Positive and negative quantities are ubiquitous in physics, and the sign carries important and varied meanings. Novices can struggle to understand the many roles signed numbers play in physics contexts, and recent evidence shows that unresolved struggle can carry over to subsequent physics courses. The mathematics education research literature documents the cognitive challenge of conceptualizing negative numbers as mathematical objects--both for experts, historically, and for novices as they learn. We contribute to the small but growing body of research in physics contexts that examines student reasoning about signed quantities and reasoning about the use and interpretation of signs in mathematical models. In this paper we present a framework for categorizing various meanings and interpretations of the negative sign in physics contexts, inspired by established work in algebra contexts from the mathematics education research community. Such a framework can support innovation that can catalyze deeper mathematical conceptualizations of signed quantities in the introductory courses and beyond

Review: Application of Tick Control Technologies for Blacklegged, Lone Star, and American Dog Ticks

Tick population control technologies have been studied for several decades but no method is successful in all situations. The success of each technology depends on tick species identity and abundance, host species identity and abundance, phenology of both ticks and hosts, geographic region, and a multitude of other factors. Here we review current technologies, presenting an overview of each and its effect on three common tick species in the eastern United States: blacklegged ticks (Ixodes scapularis (Say; Ixodida: Ixodidae)), lone star ticks (Amblyomma americanum (Linnaeus; Ixodida: Ixodidae)), and American dog ticks (Dermacentor variabilis (Say; Ixodida: Ixodidae)). Moreover, we assess the relative success among methods within the same season, as well as over successive years, in reducing tick populations by life stage. For each tick species and life stage, we present published findings, and in the absence of published studies, we hypothesize the most likely outcome based on tick life history. Integrated tick management over a specific time scale, using a variety of tick control technologies, will have the greatest effect on reducing tick abundance

Timecraft

This catalogue serves as a permanent record for the exhibition Timecraft curated by Alexis White and Mallory Fitzpatrick in conjunction with the 14th Biennial Graduate Group Symposium on the same theme. The exhibition, which ran from November 2023 to May 2024 in Carpenter Library, challenges viewers to rethink their understanding of the way time is shaped, categorized, and created in the past, present, and future.https://repository.brynmawr.edu/bmc_books/1046/thumbnail.jp