417 research outputs found

    Voices of poverty: Perspectives of one school\u27s student, teachers. and parents

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    This qualitative study examines the challenges of poverty through the stories of students and their families in one Michigan elementary school. The goal was to explore the needs, challenges, and obstacles confronting children in poverty in a small Michigan town by focusing on the perspectives and experiences of low-income students and their parents/guardians. Two families and one teacher were interviewed in depth, using open-ended, semi-structured interview techniques. Two case studies were constructed from the content of the interviews, and key thematic findings that emerged revealed ongoing stress, fear, sadness, and frustration with which the children lived, as well as strong resilience and determination. These key themes are analyzed in relation to the effects of poverty on school children and their caregivers. The study concludes with recommendations for educators that could help low-income children succeed in school

    On a viscous critical-stress model of martensitic phase transitions

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    The solid-to-solid phase transitions that result from shock loading of certain materials, such as the graphite-to-diamond transition and the alpha-epsilon transition in iron, have long been subjects of a substantial theoretical and experimental literature. Recently a model for such transitions was introduced which, based on a CS condition (CS) and without use of fitting parameters, accounts quantitatively for existing observations in a number of systems [Bruno and Vaynblat, Proc. R. Soc. London, Ser. A 457, 2871 (2001)]. While the results of the CS model match the main features of the available experimental data, disagreements in some details between the predictions of this model and experiment, attributable to an ideal character of the CS model, do exist. In this article we present a version of the CS model, the viscous CS model (vCS), as well as a numerical method for its solution. This model and the corresponding solver results in a much improved overall CS modeling capability. The innovations we introduce include: (1) Enhancement of the model by inclusion of viscous phase-transition effects; as well as a numerical solver that allows for a fully rigorous treatment of both, the (2) Rarefaction fans (which had previously been approximated by “rarefaction discontinuities”), and (3) viscous phase-transition effects, that are part of the vCS model. In particular we show that the vCS model accounts accurately for well known “gradual” rises in the alpha-epsilon transition which, in the original CS model, were somewhat crudely approximated as jump discontinuities

    Corpus Expositum: Fat Studies as Critical Education Material for Student Affairs Professionals

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    As Fat Studies is an emerging field within higher education student affairs, research shows that the academic, social, and personal development of students who face fatphobia or discrimination is stunted (Brown, 2016; McHugh and Kasardo, 2012; Ramseyer Winter, 2017; Ropers-Huilman et al., 2016; Stevens, 2018; Wann, 2009). But, as colleges have historically and continuously ignored or erased the presence of fat students on their campuses, fat students are often left without support during their college experiences (Wann, 2009). Several factors impact fat college students and this project explores these factors, including the gendered aspect to fatphobia, the medicalization of fatness due to pseudo-scientific terminology, the lack of sense of belonging for fat college students, and the current state of Diversity and Inclusion training for graduate students of higher education student affairs. Despite these challenges, student affairs practitioners must receive the education necessary to support and understand the unique experiences and challenges of fat college students. The imperative of this project, therefore, is to provide faculty of graduate student affairs programs the material for an introduction to Fat Studies in higher education for their courses that focus on Diversity and Inclusion within their curriculum

    Creating A Stormwater Runoff Model For The City Of Oxford, Mississippi: When It Rains, Where Does That Water Go?

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    The city of Oxford, Mississippi (home of the University of Mississippi) has experienced, in recent years, a rapid growth of urbanization. This rapid increase creates more impervious cover, such as bridges, roads, parking lots, etc., which can cause a stress on the capacity of stream load and causes flooding. To correct this, storm water management is needed in the city. This stormwater runoff model uses data collected from rain gauges, soil data from ssurgo and published soil infiltration rates from a Lafayette County soil survey, impervious cover created from Lidar and Aerial Photography, published evapotranspiration rates, and storm drain locations provided by the city of oxford planning department. This model uses high resolution Lidar for a detailed topographic model. Impervious cover was modeled using methods using either 1) a conditional statement using zero, 2) a conditional statement using an optimized threshold value or 3) hand editing. The flow direction and a weighted raster, one that incorporates the values of rainfall, evapotranspiration, impervious cover, and soil infiltration rate, is used within the flow accumulation model to achieve a stormwater runoff model. Nine pour points were determined capture storm water outfalls from the city. It is found that there is a significant influx of water that flows into the city. The eight pout point (on Burney Branch Creek, to the south side of the city) has the maximum outflow was found to be from Burney Branch on the south side of the city. The second largest outflow was from Davidson Creek on north side of the city

    Elementary Teachers\u27 Perceptions on Writing Proficiency of Military-Connected Students

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    At Base Elementary School (BES) in the Southwest United States school administrators were concerned that writing proficiency levels for 2014-2015 were below district and state standards and there was not a clear understanding of teachers\u27 perceptions on writing proficiency of military-connected (MC) students at the target site. Therefore, the purpose of this qualitative case study was to explore teachers\u27 perceptions on writing proficiency of MC students at BES. Using Lave and Wenger\u27s communities of practice framework, a qualitative instrumental case study was used to discern perceptions of elementary English Language Arts (ELA) teachers regarding the writing proficiency of MC students. Through a purposeful sample of 12 ELA teachers, telephone interviews were used to explore teachers\u27 writing perceptions. Data from interviews were analyzed using inductive and iterative analysis resulting in identification of key themes. Major themes included the status of existing writing practices, diverse culture of MC students, need for collaborative relationship building among teachers, and the need for targeted writing professional development (PD) focused on connecting evidence-based practices (EBP) to state writing standards using culturally responsive practices (CRP). The resulting project of a white paper, will promote stakeholder awareness of teachers\u27 perceptions, includes themes supporting the findings with recommendations that teachers would benefit from targeted writing PD focused on EBP and CRP using a collaborative model. Teacher use of these recommendations may promote social change by improving writing support for MC students possibly leading to improved performance on state proficiency assessments

    Use of the continuous wavelet tranform to enhance early diagnosis of incipient faults in rotating element bearings

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    This thesis focused on developing a new wavelet for use with the continuous wavelet transform, a new detection method and two de-noising algorithms for rolling element bearing fault signals. The work is based on the continuous wavelet transform and implements a unique Fourier Series estimation algorithm that allows for least squares estimation of arbitrary frequency components of a signal. The final results of the research also included use of the developed detection algorithm for a novel method of estimating the center frequency and bandwidth for use with the industry standard detection algorithm, envelope demodulation, based on actual fault data. Finally, the algorithms and wavelets developed in this paper were tested against seven other wavelet based de-noising algorithms and shown to be superior for the de-noising and detection of inner and outer rolling element race faults

    Right-Hand Polarized 4\u3ci\u3ef\u3c/i\u3e\u3csub\u3ece\u3c/sub\u3e Auroral Roar Emissions: 2. Nonlinear Generation Theory

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    Auroral roar emissions are commonly interpreted as Z (or upper hybrid) mode naturally excited by precipitating auroral electrons. Subsequent conversion to escaping radiation makes it possible for these emissions to be detected on the ground. Most emissions are detected as having left-hand (L) circular (or ordinary O) polarization, but the companion paper presents a systematic experimental study on the rare occurrence of the right-hand polarized, or equivalently, extraordinary (X) mode 4fce emission. A similar observation was reported earlier by Sato et al. (2015). The suggested emission mechanism is the nonlinear coalescence of two upper hybrid roars at 2fce. The present paper formulates a detailed theory for such an emission mechanism

    All-sky imager observations at South Pole Station: Recent advances and future challenges

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    第3回極域科学シンポジウム/第36回極域宙空圏シンポジウム 11月26日(月)、27日(火) 国立極地研究所 2階ラウン
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