957 research outputs found

    The Effect of Teachers\u27 Unions on Issues in School Reform

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    The thesis is divided into a number of sections. Part II examines some of the relevant literature on teachers’ unions and reform in education (specifically, merit pay, charter school, and school voucher reforms). The literature review presented in Part II is split up into two sections itself; Section A which examines the actual effectiveness of the aforementioned school reform programs on student achievement, and Section B, which examines literature showing the ways in which teachers’ unions impact school reform. In Part III, primary sources, including direct statements and information from teacher union websites and newspaper articles, are analyzed to determine how teachers’ unions actually respond to school reform issues

    Mirror Lake Management Plan

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    Management Plan and Comprehensive Lake Inventory of Mirror Lake in Wolfeboro and Tuftonboro, N

    Behavioural mechanisms underlying parasite-mediated competition for refuges in a coral reef fish

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    Parasites have been increasingly recognized as participants in indirect ecological interactions, including those mediated by parasite-induced changes to host behaviour (trait-mediated indirect interactions or TMIIs). In most documented examples, host behaviours altered by parasites increase susceptibility to predation because the predator is also a host (host-manipulation). Here, we test for a TMII in which a parasitic copepod modifies the predator-prey interaction between a small goby host and several larger predatory fish. Gobies compete for crevices in the reef to avoid predation and goby mortality increases more rapidly with increasing refuge shortage for parasitized gobies than for those free of parasites. We found interactive effects of refuge shortage and parasitism on two behaviours we predicted might be associated with parasite-mediated competition for refuges. First, as refuge-shortage increases, the rate of aggression among gobies increases and parasitism intensifies this interaction. Second, goby proximity to refuges increases as refuges become scarce, but parasitism nullifies this increase. In combination, these parasite-induced changes in behaviour may explain why parasitized gobies are poor competitors for refuges. Because the parasite is not trophically transmitted via host manipulation, these altered behaviours in parasitized gobies are likely coincidental to infection

    Professional Writing in the English Classroom: Student Writers as Problem Solvers in Literature Classrooms

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    The article reports on the role of student writers in the U.S. to enhance the study of literature in the classroom. High school teacher Dawn Reed shares how students\u27 professional writing served as a starting point for deeper study and advocacy of American literature. It provides an overview of Katie Greene\u27s assessment system that creates flexibility while providing a model of evaluation which can be adapted for other professional writing experiences

    Ebola Virus Localization in the Macaque Reproductive Tract during Acute Ebola Virus Disease.

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    Sexual transmission of Ebola virus (EBOV) has been demonstrated more than a year after recovery from the acute phase of Ebola virus disease (EVD). The mechanisms underlying EBOV persistence and sexual transmission are not currently understood. Using the acute macaque model of EVD, we hypothesized EBOV would infect the reproductive tissues and sought to localize the infection in these tissues using immunohistochemistry and transmission electron microscopy. In four female and eight male macaques that succumbed to EVD between 6 and 9 days after EBOV challenge, we demonstrate widespread EBOV infection of the interstitial tissues and endothelium in the ovary, uterus, testis, seminal vesicle, epididymis, and prostate gland, with minimal associated tissue immune response or organ pathology. Given the widespread involvement of EBOV in the reproductive tracts of both male and female macaques, it is reasonable to surmise that our understanding of the mechanisms underlying sexual transmission of EVD and persistence of EBOV in immune-privileged sites would be facilitated by the development of a nonhuman primate model in which the macaques survived past the acute stage into convalescence

    Indigenous Rural Entrepreneurialism and Social Venturing Within Native Alaskan and Canadian Aboriginal Communities: An Empirical Analysis of Critical Success Factors and Socio-Economic Benefits of Alaska Native Corporations

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    This research examines the correlation between Alaskan Native Corporations’ corporate social responsibility investment strategies and their impact on effectively creating entrepreneurial opportunities for Alaskan Native communities. Our analysis begins by examining factors affecting the alignment of Alaska Native Corporation values with indigenous cultural values (Anders & Anders, 1987). It then builds off further from previous research into social entrepreneurship and indigenous people (Curry, Donker, & Michel, 2016). We reviewed existing literature addressing connections between indigenous culture and entrepreneurial opportunities (Bardy, Drew, & Kennedy, 2011) and then adapted Donker, et. al.’s (2008) research model for assessing the relationship between corporate values and firm performance to establish a method for data collection and analysis. We hypothesize that there is a significantly positive and strong correlation between economic community development and corporate financial performance when Alaska Native cultural values are integrated into Alaska Native Corporations, when gender diversity is promoted in leadership roles within the corporations and within entrepreneurial businesses within Alaska Native communities, and when serious reasonable efforts are made to promote social well-being, economic, and educational development. In our assessment of cultural values and their impact on firm performance in Alaska Native Corporations, we used H. Donker, et. al.’s (2008) research model for assessing the relationship between corporate values and firm performance to provide a method for data collection and analysis. We also examined publicly available data regarding socio-economic factors to gauge labor participation including unemployment rates, high school Indigenous Rural Entrepreneurialism and Social Venturing in Alaska graduation rates, and student performance. This data was correlated with Alaska Native Corporation community investment programs to evaluate connections and test our hypothesis. We examined the gender diversity of Alaska Native Corporations Board of Directors to identify any impacts on firm performance, specifically how the gender diversity of corporate executive boards impacts investments in communities. Our data sample focused on the twelve regional Alaska Native Corporations, their respective non-profit foundations, and their affiliated communities

    Toward Artificial Argumentation

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    The field of computational models of argument is emerging as an important aspect of artificial intelligence research. The reason for this is based on the recognition that if we are to develop robust intelligent systems, then it is imperative that they can handle incomplete and inconsistent information in a way that somehow emulates the way humans tackle such a complex task. And one of the key ways that humans do this is to use argumentation - either internally, by evaluating arguments and counterarguments - or externally, by for instance entering into a discussion or debate where arguments are exchanged. As we report in this review, recent developments in the field are leading to technology for artificial argumentation, in the legal, medical, and e-government domains, and interesting tools for argument mining, for debating technologies, and for argumentation solvers are emerging

    Evidence for renoxification in the tropical marine boundary layer

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    We present 2 years of NOx observations from the Cape Verde Atmospheric Observatory located in the tropical Atlantic boundary layer. We find that NOx mixing ratios peak around solar noon (at 20-30pptV depending on season), which is counter to box model simulations that show a midday minimum due to OH conversion of NO2 to HNO3. Production of NOx via decomposition of organic nitrogen species and the photolysis of HNO3 appear insufficient to provide the observed noontime maximum. A rapid photolysis of nitrate aerosol to produce HONO and NO2, however, is able to simulate the observed diurnal cycle. This would make it the dominant source of NOx at this remote marine boundary layer site, overturning the previous paradigm according to which the transport of organic nitrogen species, such as PAN, is the dominant source. We show that observed mixing ratios (November-December 2015) of HONO at Cape Verde (∼ 3.5pptV peak at solar noon) are consistent with this route for NOx production. Reactions between the nitrate radical and halogen hydroxides which have been postulated in the literature appear to improve the box model simulation of NOx. This rapid conversion of aerosol phase nitrate to NOx changes our perspective of the NOx cycling chemistry in the tropical marine boundary layer, suggesting a more chemically complex environment than previously thought
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