1,416 research outputs found

    Development of Media and a Marketing Plan for the Machining, Sheet Metal and Welding Programs at Worcester Technical High School

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    Interest at Worcester Technical High School (WTHS) in the fields of Machining, Sheet Metal and Welding is disproportionately low when compared to the industrial demand for workers in these fields. To help promote these programs, videos of the shops in action were created to aid the instructors in the recruitment of incoming freshman. Interviews with successful seniors at the school were also filmed. Lastly, a PowerPoint presentation highlighting the competitive wages of the metal fabrication fields was created. These tools have been provided to WTHS, as well as to the individual shop instructors, to spread positive information about these important trades

    Dynamic Modeling of Wooden Baseball Bats

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    The objective of this project is to develop a dynamic model that predicts the performance of wooden baseball bats. The model is sensitive to the manner in which the mass is distributed throughout out the bat as measured by its total mass, its moment of inertia, and the axial location of the center of its center of mass. We employ rigid body dynamics and the effects of inelastic bat/ball collisions to investigate how the outgoing ball velocity is affected by changes in the mass distribution of the bat, the minimum and maximum radii of the bat, and the locations along the bat of minimum and maximum radii. The results are influenced by the coefficient of restitution of the collision, the angular velocity of the swing, and the dependence of angular on the moment of inertia of the bat

    Size Matters: Large Objects Capture Attention in Visual Search

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    Can objects or events ever capture one's attention in a purely stimulus-driven manner? A recent review of the literature set out the criteria required to find stimulus-driven attentional capture independent of goal-directed influences, and concluded that no published study has satisfied that criteria. Here visual search experiments assessed whether an irrelevantly large object can capture attention. Capture of attention by this static visual feature was found. The results suggest that a large object can indeed capture attention in a stimulus-driven manner and independent of displaywide features of the task that might encourage a goal-directed bias for large items. It is concluded that these results are either consistent with the stimulus-driven criteria published previously or alternatively consistent with a flexible, goal-directed mechanism of saliency detection

    The role of plant functional trade-offs for biodiversity changes and biome shifts under scenarios of global climatic change

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    The global geographic distribution of biodiversity and biomes is determined by species-specific physiological tolerances to climatic constraints. Current vegetation models employ empirical bioclimatic relationships to predict present-day vegetation patterns and to forecast biodiversity changes and biome shifts under climatic change. In this paper, we consider trade-offs in plant functioning and their responses under climatic changes to forecast and explain changes in plant functional richness and shifts in biome geographic distributions. <br><br> The Jena Diversity model (JeDi) simulates plant survival according to essential plant functional trade-offs, including ecophysiological processes such as water uptake, photosynthesis, allocation, reproduction and phenology. We use JeDi to quantify changes in plant functional richness and biome shifts between present-day and a range of possible future climates from two SRES emission scenarios (A2 and B1) and seven global climate models using metrics of plant functional richness and functional identity. <br><br> Our results show (i) a significant loss of plant functional richness in the tropics, (ii) an increase in plant functional richness at mid and high latitudes, and (iii) a pole-ward shift of biomes. While these results are consistent with the findings of empirical approaches, we are able to explain them in terms of the plant functional trade-offs involved in the allocation, metabolic and reproduction strategies of plants. We conclude that general aspects of plant physiological tolerances can be derived from functional trade-offs, which may provide a useful process- and trait-based alternative to bioclimatic relationships. Such a mechanistic approach may be particularly relevant when addressing vegetation responses to climatic changes that encounter novel combinations of climate parameters that do not exist under contemporary climate

    Design of a Composite Scaffold for Myocardial Regeneration Following Infarction

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    The heart does not regenerate new tissue when myocardium dies following acute myocardial infarction. We have undertaken an iterative process to design and test a patch that will replace infarcted tissue and induce myocardial regeneration to improve heart function. The result is a composite scaffold design composed of an endocardial patch to provide mechanical stability and an injectable filler material to provide a regenerative scaffold environment. This project provides a vital first step toward a final solution for myocardial regeneration

    Providing Feedback Following Leadership Walkrounds is Associated with Better Patient Safety Culture, Higher Employee Engagement and Lower Burnout

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    Background There is a poorly understood relationship between Leadership WalkRounds (WR) and domains such as safety culture, employee engagement, burnout and work-life balance. Methods This cross-sectional survey study evaluated associations between receiving feedback about actions taken as a result of WR and healthcare worker assessments of patient safety culture, employee engagement, burnout and work-life balance, across 829 work settings. Results 16 797 of 23 853 administered surveys were returned (70.4%). 5497 (32.7% of total) reported that they had participated in WR, and 4074 (24.3%) reported that they participated in WR with feedback. Work settings reporting more WR with feedback had substantially higher safety culture domain scores (first vs fourth quartile Cohen’s d range: 0.34–0.84; % increase range: 15–27) and significantly higher engagement scores for four of its six domains (first vs fourth quartile Cohen’s d range: 0.02–0.76; % increase range: 0.48–0.70). Conclusion This WR study of patient safety and organisational outcomes tested relationships with a comprehensive set of safety culture and engagement metrics in the largest sample of hospitals and respondents to date. Beyond measuring simply whether WRs occur, we examine WR with feedback, as WR being done well. We suggest that when WRs are conducted, acted on, and the results are fed back to those involved, the work setting is a better place to deliver and receive care as assessed across a broad range of metrics, including teamwork, safety, leadership, growth opportunities, participation in decision-making and the emotional exhaustion component of burnout. Whether WR with feedback is a manifestation of better norms, or a cause of these norms, is unknown, but the link is demonstrably potent
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