1,125 research outputs found

    Vibrational characteristics of linear space frames

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    Digital computer program for determining modes and frequencies of arbitrary linear space frame

    Math in/and Physics [11th-12th grade]

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    This unit is written to be taught during the first two weeks of the physics course. In any physics course, from conceptual physics up through graduate studies, there is a unique and significant dependence on the mathematical concepts and skills required to succeed in the course. A keen understanding of mathematics, as well as knowing how to apply the tools, is an important piece of the physics course. Math in/and Physics is designed to answer the question, “If this is a physics class, why do I have to do so much math?” The goals of this unit are designed to allow the students to discover for themselves the answers to this question. This unit takes the students through the entire year, by way of a physical survey of the math skills needed. They will audit the year according to math milestones that will help them achieve confidence and strength in physics. Students will create a Physics/Math Survival Guide that will contain the math concepts, examples of when to use these concepts, and a “how-to” page that walks to reader though the problem-solving protocols for the physical concepts. The Survival Guide is a product that students will continue to add to and build as the year progresses, and, in many cases, this Guide can follow the high school students through to college. In addition to the goal of academic success, the Physics/Math Survival Guide also serves as a model in organization, scaffolding, and interdisciplinary studies. It teaches the students to go beyond the individualization of class and subject and make connections. The Guide will help students realize the value of mathematical reason and logic beyond the math classroom, and into their lives as learners and doers

    User's guide: SPAR processor MN analysis of inelastic three-dimensional solids, part 2

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    A user's guide to the processor MN is presented. The processor MN is used to analyze systems in which some or all of the three dimensional elements have nonlinear stress-strain relations. Representations of nonlinear material behavior implemented into the system are provided including Von Mises yield criterion, the Prandtl-Reuss flow rule, and the mechanical sublayer method. The primary data sets used to represent the state of the system are presented

    Snap dynamics

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    Computer program calculates normal vibration modes of complex structures elimating excessively large amounts of input data, run time, and core storage. Provision for accuracy improvement is also included

    Utility of Repeat Screening for Asymptomatic Bacteriuria in Pregnancy

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    UTILITY OF REPEAT SCREENING FOR ASYMPTOMATIC BACTERIURIA IN PREGNANCY Sara Whetstone, Stephen Thung, and Jessica Illuzzi. Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale University, School of Medicine, New Haven, CT. Asymptomatic bacteriuria (ASB) during pregnancy is associated with an increased risk of developing pyelonephritis. The objectives of our study were to determine the incidence of ASB throughout the first two trimesters of pregnancy and to compare the cost effectiveness of performing repeat screening with a single screening strategy for ASB to prevent pyelonephritis. In this prospective cohort study, 206 pregnant women at an urban academic obstetric clinic provided urine for culture at monthly prenatal visits, and the incidence of ASB was calculated at 4 weeks intervals in the first and second trimesters. Descriptive statistics were calculated and used as baseline estimates in the cost-effectiveness analysis. Decision and cost-effectiveness analyses were performed. In the decision analysis, three strategies were compared: (1) no screening; (2) screening for ASB once in the first trimester; and (3) screening for ASB once in the first trimester and once between 18 and 22 weeks gestational age (GA). 9.71% of women were positive on initial screening culture for ASB. Among women with an initial negative culture, the incidence rate of ASB was 0% at less than 14 weeks GA, 1.1% between 14-18 weeks GA, 4.2% between 18-22 weeks GA, and 1.8% at greater than 22 weeks GA. The proportion of women identified with ASB on initial culture did not differ statistically from the proportion identified on repeat culture (McNemars test, p-value \u3e 0.05). In the decision analysis, a policy of routine screening in the first and second trimester (2 urine culture strategy) was the dominant strategy compared to no screening and a single culture strategy. The model was robust in the sensitivity analysis

    Mothers for and against the Nation: Complexities of a Maternal Politics of Care

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    The politics of care linked with maternal activism often takes for granted a mutually agreed upon understanding of care. However, care is deployed in varying ways by those engaging in maternal activism. Caring cannot be assumed to be inclusive and may be exclusive, particularly when used by maternal activists linked with rightwing politics. This article explores how a maternal politics of care can reflect both progressive and reactionary politics. It uses Andrea O’Reilly’s framework of patriarchal motherhood to explore theoretically divergent international case studies of maternal activism. These cases demonstrate that a maternal politics of care can be used to support a myriad of issues on either side of the political spectrum to reflect individualized and exclusionary visions of care, “paternalistic maternalism,” (Wu), or a collective politics of care. Despite the connections often drawn between mothering labour and care labour, the function of care differs across the political spectrum. For some, caring entails collective liberation and common good and disrupts exclusive—often racist—membership in the nation. For others, care for some necessitates the denial of care for others to ensure the purity of the nation. For others still, some mothers are unable to properly care. The latter reflects a white-saviour complex, which is as concerning as the politics of hate that seeks to limit caring to certain groups. What this suggests is that constructions of who can care and who is worthy of care are deeply raced and classed as well as based on gender, sexual preference, and other social identity factors

    A Comprehensive Scientometric Evaluation of the Field of Information Literacy Using Hybrid Bibliometrics and Full-Text Lexical Analysis Methods

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    In scientometric studies, hybrid approaches (i.e., the combination of traditional bibliometric techniques and lexical analysis methods) are used to investigate fields of research. With the increasing availability of full-text documents in machine-readable formats, advanced techniques (e.g., natural language processing [NLP]) are becoming common practice. Numerous bibliometric analyses have been conducted in the field of information literacy (IL). However, the majority of these investigations focus on citation metadata, while some incorporate lexical analyses of titles and abstracts. The purpose of this dissertation work is to contribute to existing scientometrics knowledge of the IL field using novel and advanced hybrid methods. The primary goal is to examine IL holistically, using both bibliometric techniques and full-text lexical analyses. The study aims to answer the following research questions: 1) What are the most important historical publications in the IL field?; 2) What are the intellectual and collaborative structural configurations of the IL field?; 3) To what extent are the structural configurations enhanced by lexical analysis?; and 4) How has the field of IL evolved over time with respect to seminal concepts and vocabulary? This poster presents findings from preliminary analyses. Citation metadata and full-text documents were collected from Web of Science (WoS), Scopus, and Google Scholar. The methods used include reference publication year spectroscopy (RPYS) to establish the historical roots of the IL literature, co-word analysis to map the intellectual structure of the IL field, and co-authorship analysis to analyze the collaboration networks of IL researchers

    Defining Music of a Questionable Past: A College Musician’s Approach

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    In recent years, social movements have raised awareness on issues like whitewashing and the oppression of minority voices in fields such as music. These social movements have drawn attention to the cultural appropriation that sometimes occurs in music classrooms. Outcomes from recent legislation proposals and social conflicts across the United States threaten to limit educational opportunities. Although many people have understood these pieces of legislation to affect topics such as history and English, it may also affect music education. When choosing music to teach their students, music educators are often challenged as many songs have questionable pasts and make references that may be offensive to minority groups. These challenges, in addition to recent social conflicts and threatening legislation, demand an examination into the debates surrounding education, music of a questionable past, and how educators and musicians with different backgrounds deal with those tensions

    Monetary Policy and Income Inequality in the United States and Spain

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    Background Contractionary monetary policy has long term effects on inequality (Feldkircher & Kakamu, 2018). However, other forms of monetary policy do not have a clear effect on income inequality. Central banks defend the position that other factors are the driving forces behind income inequality (Powell, 2018). Methodology This investigation utilized ANOVA Regression analysis to determine if income inequality, as measured by wage growth by sector, is related to interest rates in the United States and Spain. If applicable, slopes of the regression lines for each sector were compared to see if they were significantly different, in a statistical sense. Results At interest rates above 0.4 percent in the United States, the Federal Funds Rate has asymmetric effects on the sectors studied. In Spain, there is no clear relationship between the European Central Bank (ECB) rate of discount and wage growth, so tests of the slope were not relevant. Conclusion In the United States, higher, or contractionary, rates of interest appear to have an impact on income inequality. This is in line with the results of previous studies
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