533 research outputs found

    Politics, penality and (post-)colonialism : an introduction

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    Politics, Penality and (Post-)Colonialism: An Introductio

    African soldiers in the USSR: oral histories of ZAPU intelligence cadres’ Soviet training, 1964–1979

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    A growing literature has shed new light on interactions between the Soviet Union and Africa, notably through studies of the large numbers of African students who arrived in Moscow from 1960. Scholars have, however, largely ignored the many thousands of African military trainees who arrived in the same period. Here we begin to explore soldiers’ experiences through a focus on intelligence cadres of the Zimbabwe African People’s Union (ZAPU). We ask how their Soviet sojourns shaped their lives and ZAPU’s struggle, and consider the strengths and limits of oral histories in going beyond questions of strategy and Cold War binaries. ZAPU trainees depicted themselves as men of education and political sophistication who were able to shape the content of their training and make efficacious use of it. Their most abiding political lessons came from the understanding they gained of Soviet history – particularly the sacrifices of the Great Patriotic War – and their experiences of ‘living socialism’. What these cadres depicted as Soviet egalitarianism, anti-racism, and state provision for basic needs held a powerful appeal due to the dramatic contrast to settler-ruled Rhodesia. Soviet support certainly influenced ZAPU, but these accounts indicate that it did so in negotiated, pragmatic and at times surprising ways that were shaped by interactions with many other foreign hosts, the influence of a specifically Rhodesian history of discrimination and oppression, and ZAPU’s own assessment of its military needs

    Comparing the 2013 ACC/AHA & 2014 NLA Dyslipidemia Guidelines and Their Impact on Clinical Decision Making

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    This home-study CPE activity has been developed to educate pharmacists on the similarities and differences between the 2014 NLA Recommendations for Dyslipidemia Management and the 2013 ACC/AHA Guidelines for Treatment of Blood Cholesterol

    Crawling in a fluid

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    There is increasing evidence that mammalian cells not only crawl on substrates but can also swim in fluids. To elucidate the mechanisms of the onset of motility of cells in suspension, a model which couples actin and myosin kinetics to fluid flow is proposed and solved for a spherical shape. The swimming speed is extracted in terms of key parameters. We analytically find super- and subcritical bifurcations from a non-motile to a motile state and also spontaneous polarity oscillations that arise from a Hopf bifurcation. Relaxing the spherical assumption, the obtained shapes show appealing trends

    Robust energy harvesting from walking vibrations by means of nonlinear cantilever beams

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    In the present work we examine how mechanical nonlinearity can be appropriately utilized to achieve strong robustness of performance in an energy harvesting setting. More specifically, for energy harvesting applications, a great challenge is the uncertain character of the excitation. The combination of this uncertainty with the narrow range of good performance for linear oscillators creates the need for more robust designs that adapt to a wider range of excitation signals. A typical application of this kind is energy harvesting from walking vibrations. Depending on the particular characteristics of the person that walks as well as on the pace of walking, the excitation signal obtains completely different forms. In the present work we study a nonlinear spring mechanism that is composed of a cantilever wrapping around a curved surface as it deflects. While for the free cantilever, the force acting on the free tip depends linearly on the tip displacement, the utilization of a contact surface with the appropriate distribution of curvature leads to essentially nonlinear dependence between the tip displacement and the acting force. The studied nonlinear mechanism has favorable mechanical properties such as low frictional losses, minimal moving parts, and a rugged design that can withstand excessive loads. Through numerical simulations we illustrate that by utilizing this essentially nonlinear element in a 2 degrees-of-freedom (DOF) system, we obtain strongly nonlinear energy transfers between the modes of the system. We illustrate that this nonlinear behavior is associated with strong robustness over three radically different excitation signals that correspond to different walking paces. To validate the strong robustness properties of the 2DOF nonlinear system, we perform a direct parameter optimization for 1DOF and 2DOF linear systems as well as for a class of 1DOF and 2DOF systems with nonlinear springs similar to that of the cubic spring that are physically realized by the cantilever–surface mechanism. The optimization results show that the 2DOF nonlinear system presents the best average performance when the excitation signals have three possible forms. Moreover, we observe that while for the linear systems the optimal performance is obtained for small values of the electromagnetic damping, for the 2DOF nonlinear system optimal performance is achieved for large values of damping. This feature is of particular importance for the systemŚłs robustness to parasitic damping.Massachusetts Institute of Technology. Naval Engineering Education Center. (Grant 3002883706)National Science Foundation (U.S.). Graduate Research Fellowship Program (Grant 1122374)MIT Energy Initiativ

    The Advent of Digital Productivity Assistants: The Case of Microsoft MyAnalytics

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    Modern digital work environments allow for great flexibility, but can also contribute to a blurring of work/life boundaries and technostress. An emerging class of intelligent tools, that we term Digital Productivity Assistant (DPA), helps knowledge workers to improve their productivity by creating awareness of their collaboration behaviour and by suggesting improvements. In this revelatory case study, we combine auto-ethnographic insights with interview data from three organisations to explore how one such tool works to influence collaboration and productivity management behaviours, using the lens of persuasive IS design. We also identify barriers to DPAs’ effective use as a partner in personal productivity management

    Exploring Social Justice Through Art in a Community Health Nursing Course

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    Social justice and health equity are foundational to community health nursing. Arts-based pedagogy has learning and reflexive value for community and population health education within nursing and health professions curricula have been increasingly used in health care and in promoting health, including in nursing education. However, research has not explored the use of arts to teach community health nursing students about social justice. The objective of this study was to understand how the inclusion of a collaborative artistic process relates to the understanding of social justice issues for second-year baccalaureate nursing students enrolled in a community health nursing course. Visual art and symbolic components were added to an existing group concept mapping assignment of community health nursing interventions from a social justice approach. We engaged in analysis within interpretive phenomenological inquiry to understand and share students’ experiences with constructing and giving meaning to symbols and art pieces, internalizing the concept of social justice, and collaborating with group members. Students used symbols and visual representation to explore social justice and health. Students’ narrative reflections encompassed experiences finding personal power, engaging in empathy, reflecting on their own position and privilege, and benefitting from non-traditional forms of learning. Students recounted group processes that deepened their understanding of concepts, increased their appreciation of the need for advocacy, and enabled creative freedom in the context of collective vision. The addition of a collaborative creative, artistic process enhanced students’ learning about social justice and health
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