720 research outputs found

    The Play in the System

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    What does artistic resistance look like in the twenty-first century, when disruption and dissent have been co-opted and commodified in ways that reinforce dominant systems? In The Play in the System Anna Watkins Fisher locates the possibility for resistance in artists who embrace parasitism—tactics of complicity that effect subversion from within hegemonic structures. Fisher tracks the ways in which artists on the margins—from hacker collectives like Ubermorgen to feminist writers and performers like Chris Kraus—have willfully abandoned the radical scripts of opposition and refusal long identified with anticapitalism and feminism. Space for resistance is found instead in the mutually, if unevenly, exploitative relations between dominant hosts giving only as much as required to appear generous and parasitical actors taking only as much as they can get away with. The irreverent and often troubling works that result raise necessary and difficult questions about the conditions for resistance and critique under neoliberalism today

    The Power of Play: The Portrayal and Performance of Race in Video Games

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    Part of the Volume on the Ecology of Games: Connecting Youth, Games, and LearningThe chapter addresses the following question: in what ways do young people's interactions with video games influence how and what they learn about race? We begin by examining one of the most heavily marketed genres in the video games marketplace, what we call "urban/street" games. Specifically, we consider how these games, and the richly detailed and textured urban landscapes they present, establish powerful learning environments that help situate how young gamers understand, perform, and reproduce race and ethnicity. Next, we focus on the aesthetic and narrative properties of one of the most controversial yet successful video games franchises in America, Grand Theft Auto. More precisely, we consider how Grand Theft Auto teaches dominant attitudes and assumptions about race and racial Otherness through racialized pedagogical zones (RPZs). In the final section of the paper we expand the discussion of race and games to include concerns about access to and participation in digital media culture

    Simulation of the Sampling Distribution of the Mean Can Mislead

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    Although the use of simulation to teach the sampling distribution of the mean is meant to provide students with sound conceptual understanding, it may lead them astray. We discuss a misunderstanding that can be introduced or reinforced when students who intuitively understand that “bigger samples are better” conduct a simulation to explore the effect of sample size on the properties of the sampling distribution of the mean. From observing the patterns in a typical series of simulated sampling distributions constructed with increasing sample sizes, students reasonably—but incorrectly—conclude that, as the sample size, n, increases, the mean of the (exact) sampling distribution tends to get closer to the population mean and its variance tends to get closer to 2 / , where 2 is the population variance. We show that the patterns students observe are a consequence of the fact that both the variability in the mean and the variability in the variance of simulated sampling distributions constructed from the means of N random samples are inversely related, not only to N, but also to the size of each sample, n. Further, asking students to increase the number of repetitions, N, in the simulation does not change the patterns

    Historical Geomorphological Research of a Ligurian Coastal Floodplain (Italy) and Its Value for Management of Flood Risk and Environmental Sustainability

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    The alluvial plain of the Entella River (Eastern Liguria), historically affected by damaging flood events, has been heavily modified over the past 250 years by human activity and natural processes. A qualitative and quantitative analysis of the morphological and land use evolution of the Entella floodplain since the 18th century was carried out using base maps and aerial photos ranging from 1758 to 2016. These diverse sources were Geographical Information System (GIS) georeferenced. Additional information on land-use change was gathered from historical documents and recent research reports. The main transformations to the floodplain include morphological changes, e.g., narrowing, channelization, displacement of the river channel and the advance of the coastal line due to fills and embankments. In addition, there has been very significant urbanization with loss of vegetated and agricultural areas. Our results indicate the primary role of human disturbance on morphological changes and landscape modifications of the coastal floodplain, particularly over the last 200 years. Furthermore, the historical geomorphological and cartographical analysis we adopted to reconstruct the floodplain transformation represents an essential tool in flood risk mitigation and environmental sustainability management, particularly in an urbanized coastal plain historically affected by floods

    A validated methodology for the prediction of heating and cooling energy demand for buildings within the Urban Heat Island: Case-study of London

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    This is the post-print version of the final paper published in Solar Energy. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. Copyright @ 2010 Elsevier B.V.This paper describes a method for predicting air temperatures within the Urban Heat Island at discreet locations based on input data from one meteorological station for the time the prediction is required and historic measured air temperatures within the city. It uses London as a case-study to describe the method and its applications. The prediction model is based on Artificial Neural Network (ANN) modelling and it is termed the London Site Specific Air Temperature (LSSAT) predictor. The temporal and spatial validity of the model was tested using data measured 8 years later from the original dataset; it was found that site specific hourly air temperature prediction provides acceptable accuracy and improves considerably for average monthly values. It thus is a very reliable tool for use as part of the process of predicting heating and cooling loads for urban buildings. This is illustrated by the computation of Heating Degree Days (HDD) and Cooling Degree Hours (CDH) for a West–East Transect within London. The described method could be used for any city for which historic hourly air temperatures are available for a number of locations; for example air pollution measuring sites, common in many cities, typically measure air temperature on an hourly basis.EPSR

    The role and scope of contemporary midwifery practice in Australia: A scoping review of the literature

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    Problem: Little is known about the breadth of midwifery scope within Australia, and few midwives work to their full scope of practice. Background: Midwives in Australia are educated and professionally accountable to work in partnership with childbearing women and their families, yet they are currently hindered from practicing within their full scope of practice by contextual influences. Aims: To perform a scoping review of the literature to map out the role and scope of contemporary midwifery practice in Australia To identify any key issues that impact upon working within the full scope of midwifery practice in the Australian context Methods: A scoping review of the literature guided by the Arksey and O’Malley’s five-stage methodological framework, and the ‘best fit’ framework synthesis using the Nursing and Midwifery Board of Australia’s Midwifery Standards for Practice. Findings: Key themes that emerged from the review included Partnership with women; The professional role of the midwife; and Contextual influences upon midwifery practice. Discussion: Tensions were identified between the midwifery scope of practice associated with optimal outcomes for women and babies supported by current evidence and the actual role and scope of most midwives employed in models of care in the current Australian public healthcare system. Conclusions: There is a mismatch between the operational parameters for midwifery practice in Australia and the evidence-based models of continuity of midwifery carer that are associated with optimal outcomes for childbearing women and babies and the midwives themselves

    Diagnostic accuracy of 3.0-T magnetic resonance T1 and T2 mapping and T2-weighted dark-blood imaging for the infarct-related coronary artery in Non-ST-segment elevation myocardial infarction

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    Background: Patients with recent non–ST‐segment elevation myocardial infarction commonly have heterogeneous characteristics that may be challenging to assess clinically. Methods and Results: We prospectively studied the diagnostic accuracy of 2 novel (T1, T2 mapping) and 1 established (T2‐weighted short tau inversion recovery [T2W‐STIR]) magnetic resonance imaging methods for imaging the ischemic area at risk and myocardial salvage in 73 patients with non–ST‐segment elevation myocardial infarction (mean age 57±10 years, 78% male) at 3.0‐T magnetic resonance imaging within 6.5±3.5 days of invasive management. The infarct‐related territory was identified independently using a combination of angiographic, ECG, and clinical findings. The presence and extent of infarction was assessed with late gadolinium enhancement imaging (gadobutrol, 0.1 mmol/kg). The extent of acutely injured myocardium was independently assessed with native T1, T2, and T2W‐STIR methods. The mean infarct size was 5.9±8.0% of left ventricular mass. The infarct zone T1 and T2 times were 1323±68 and 57±5 ms, respectively. The diagnostic accuracies of T1 and T2 mapping for identification of the infarct‐related artery were similar (P=0.125), and both were superior to T2W‐STIR (P<0.001). The extent of myocardial injury (percentage of left ventricular volume) estimated with T1 (15.8±10.6%) and T2 maps (16.0±11.8%) was similar (P=0.838) and moderately well correlated (r=0.82, P<0.001). Mean extent of acute injury estimated with T2W‐STIR (7.8±11.6%) was lower than that estimated with T1 (P<0.001) or T2 maps (P<0.001). Conclusions: In patients with non–ST‐segment elevation myocardial infarction, T1 and T2 magnetic resonance imaging mapping have higher diagnostic performance than T2W‐STIR for identifying the infarct‐related artery. Compared with conventional STIR, T1 and T2 maps have superior value to inform diagnosis and revascularization planning in non–ST‐segment elevation myocardial infarction. Clinical Trial Registration: URL: http://www.clinicaltrials.gov. Unique identifier: NCT02073422
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