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Wilkerson, Jessica (2019) To Live Here, You Have to Fight: How Women Led Appalachian Movements for Social Justice, University of Illinois, Urbana, IL.
No full textStrangleman, Tim (2019) Voices of Guinness: An Oral History of the Park Royal Brewery, Oxford University Press, New York, NY.
No full textGaffney, Karen (2018). Dismantling the Racism Machine: A Manual and Toolbox, Routledge, New York, NY.
No full textGender and Working-Class Identity in Deindustrializing Sudbury, Ontario
No full textIn this article I explore the making of a gendered working-class identity among a sample of male nickel miners in Sudbury, Ontario, Canada. Through 26 oral history interviews conducted between January 2015 and July 2018 with current and retired miners (ages 26 to 74), I analyze how the industrial relations framework and social relations of the postwar period shaped – and continue to shape – a masculinized working-class identity. I then examine the ways in which economic restructuring and the partial deindustrialization of Sudbury’s mines have affected workers’ ideas about gender and class. I argue that, amid growing precarious employment in both the mining industry and the regional economy more broadly, the male workers in this study continue to gender their class identities, which limits attempts to build working-class solidarity in a labor market now largely characterized by feminized service sector employment
Matrix Shanks Transformations
No full textShanks' transformation is a well know sequence transformation for accelerating the convergence of scalar sequences. It has been extended to the case of sequences of vectors and sequences of square matrices satisfying a linear difference equation with scalar coefficients. In this paper, a more general extension to the matrix case where the matrices can be rectangular and satisfy a difference equation with matrix coefficients is proposed and studied. In the particular case of square matrices, the new transformation can be recursively implemented by the matrix -algorithm of Wynn. Then, the transformation is related to matrix Padé-type and Padé approximants. Numerical experiments showing the interest of this transformation end the paper
On Sign Pattern Matrices that Allow or Require Algebraic Positivity
No full textA square matrix M with real entries is algebraically positive (AP) if there exists a real polynomial p such that all entries of the matrix p(M) are positive. A square sign pattern matrix S allows algebraic positivity if there is an algebraically positive matrix M whose sign pattern is S. On the other hand, S requires algebraic positivity if matrix M, having sign pattern S, is algebraically positive. Motivated by open problems raised in a work of Kirkland, Qiao, and Zhan (2016) on AP matrices, all nonequivalent irreducible 3 by 3 sign pattern matrices are listed and classify into three groups (i) those that require AP, (ii) those that allow but not require AP, or (iii) those that do not allow AP. A necessary condition for an irreducible n by n sign pattern to allow algebraic positivity is also provided
α-Adjacency: A generalization of adjacency matrices
No full textB. Shader and W. So introduced the idea of the skew adjacency matrix. Their idea was to give an orientation δ to a simple undirected graph G from which a skew adjacency matrix S(Gδ ) is created. The α-adjacency matrix extends this idea to an arbitrary field F. To study the underlying undirected graph, the average α-characteristic polynomial can be created by averaging the characteristic polynomials over all the possible orientations. In particular, a Harary-Sachs theorem for the average α-characteristic polynomial is derived and used to determine a few features of the graph from the average α-characteristic polynomial
Decomposition of symplectic matrices into products of symplectic unipotent matrices of index 2
No full textIn this article, it is proved that every symplectic matrix can be decomposed into a product of three symplectic unipotent matrices of index 2, i.e., every complex matrix A satisfying ATJA = J with J = [0
Computing Kemeny's constant for a barbell graph
No full textIn a graph theory setting, Kemeny’s constant is a graph parameter which measures a weighted average of the mean first passage times in a random walk on the vertices of the graph. In one sense, Kemeny’s constant is a measure of how well the graph is ‘connected’. An explicit computation for this parameter is given for graphs of order n consisting of two large cliques joined by an arbitrary number of parallel paths of equal length, as well as for two cliques joined by two paths of different length. In each case, Kemeny’s constant is shown to be O(n3), which is the largest possible order of Kemeny’s constant for a graph on n vertices. The approach used is based on interesting techniques in spectral graph theory and includes a generalization of using twin subgraphs to find the spectrum of a graph
Long-term alpine stream monitoring in the Teton Range: Investigating multi-year patterns and thermal physiology
No full textAlpine streams and the biotic communities they contain are imperiled worldwide due to climate warming and the rapid decline of ice. The loss of glaciers and permanent snowpack may drive local populations to extinction, especially organisms with narrow habitat tolerances. We have been monitoring alpine streams in the Teton Range since 2015 that originate from three hydrological sources: surface glaciers, snowfields, or subterranean ice (e.g., rock glaciers). We call these stream types glacier-fed, snowmelt-fed, and icy seeps, respectively. We hypothesize that icy seeps may persist on the landscape longer than other hydrologic sources and that these features may act as a refuge for cold-adapted organisms such as the stoneflies Zapada glacier and Lednia tetonica. In November 2019, Z. glacier and a sister species of L. tetonica, Lednia tumana, were listed under the U.S. Endangered Species Act. This decision was based in part on work funded by the UW-NPS and highlights the pressing nature of our efforts. In 2019, we collected a 5th year of long-term data to begin investigating multi-year signals in the data. Our second 2019 objective was to further explore how thermal regimes affect tolerance of potentially imperiled insects. Because our annual data collection occurs in late summer with sample processing and analysis extending into the following year, this report will be a broad update on the project as whole, rather than 2019-specific. Through long-term monitoring of streams from different hydrological sources, we are building a dataset that will allow us to understand changes as air temperatures warm and permanent ice is lost in the alpine zone.
Featured photo by Nicole Y-C on Unsplash. https://unsplash.com/photos/9XixVlnUCb