312 research outputs found

    Critical Geography and the Real World in First-Year Writing Classrooms

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    By helping students confront the ideologies that shape their physical and cultural experiences, critical geography in first year writing classrooms may be one means of collapsing the perceived distance between the classroom and the real world

    An Experimental Test of Tradeoffs between Discount Rates and Number of Firms in Supporting Collusion

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    One prediction of oligopoly theory is that there should be a tradeoff between discount rates (rates of time preference) and the number of competitors in a market, in supporting the possibility of collusive equilibria. Here we conduct a series of laboratory experiments with markets of 2, 3, and 4 firms, and discount rates explicitly accounted for, and examine whether the tradeoffs predicted in theory occur in the behavior of our subjects. We find that an increased number of firms in a market is associated with larger market output (and lower prices), reflecting the generalized Cournot result throughout. We fail to observe an impact of higher discount rates in further limiting collusive behavior

    The Beck Initiative : training school-based mental health staff in cognitive therapy

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    A growing literature supports cognitive therapy (CT) as an efficacious treatment for youth struggling with emotional or behavioral problems. Recently, work in this area has extended the dissemination of CT to school-based settings. The current study has two aims: 1) to examine the development of therapists’ knowledge and skills in CT, an evidence-based approach to promoting student well-being, and 2) to examine patterns of narrative feedback provided to therapists participating in the program. As expected, school therapists trained in CT demonstrated significant gains in their knowledge of CT theory and in their demonstration of CT skills, with the majority of therapists surpassing the accepted threshold of competency in CT. In addition, an examination of feedback content suggested that narrative feedback provided to therapists most frequently consisted of positive feedback and instructions for future sessions. Suggestions for future research regarding dissemination of CT are discussed in light of increasing broad access to evidence based practices.peer-reviewe

    Ultra-Stable Segmented Telescope Sensing and Control Architecture

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    The LUVOIR team is conducting two full architecture studies Architecture A 15 meter telescope that folds up in an 8.4m SLS Block 2 shroud is nearly complete. Architecture B 9.2 meter that uses an existing fairing size will begin study this Fall. This talk will summarize the ultra-stable architecture of the 15m segmented telescope including the basic requirements, the basic rationale for the architecture, the technologies employed, and the expected performance. This work builds on several dynamics and thermal studies performed for ATLAST segmented telescope configurations. The most important new element was an approach to actively control segments for segment to segment motions which will be discussed later

    Madrid Río, El Matadero and the Nature of Urbanization

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    This essay considers two closely related high-profile urban renewal projects that have altered the landscape of the southern region of Madrid since 2007: Madrid Río and El Matadero Madrid Centro de Creación Contemporánea. While the former is often cast as renovating the 'natural' ecology of the city and the latter a renovation of its cultural landscape, both Madrid Río and El Matadero commodify the closely related concepts of ecological sustainability and nature. By analyzing the circulation of these discourses of nature and ecological sustainability along with their material expression in the urban landscape, we argue that these projects find new ways of enclosing, containing, packaging and selling Nature in Madrid on a global scale. In doing so, the Madrid Río and Matadero throw into relief the ways that cultural production frames our relationship and understanding of ecological sensibility. The production of new urban environments and the infrastructure that makes them possible (the metabolic conditions and technologies that permit for the flow of energy, food, information, bodies, and things) are always mediated by institutional arrangements that are occasionally democratic, but are always deeply committed to the unending expansion of the circulation of capital—a prospect that is implicitly not ecological

    Initial Technology Assessment for the Large-Aperture UV-Optical-Infrared (LUVOIR) Mission Concept Study

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    The NASA Astrophysics Division's 30-Year Roadmap prioritized a future large-aperture space telescope operating in the ultra-violet/optical/infrared wavelength regime. The Association of Universities for Research in Astronomy envisioned a similar observatory, the High Definition Space Telescope. And a multi-institution group also studied the Advanced Technology Large Aperture Space Telescope. In all three cases, a broad science case is outlined, combining general astrophysics with the search for biosignatures via direct-imaging and spectroscopic characterization of habitable exoplanets. We present an initial technology assessment that enables such an observatory that is currently being studied for the 2020 Decadal Survey by the Large UV/Optical/Infrared (LUVOIR) surveyor Science and Technology Definition Team. We present here the technology prioritization for the 2016 technology cycle and define the required technology capabilities and current state-of-the-art performance. Current, planned, and recommended technology development efforts are also reported
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