369 research outputs found

    Conceptualizing Resilience

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    "This commentary provides an overview of the idea of resilience, and acknowledges the challenges of defining and applying the idea in practice. The article summarizes a way of looking at resilience called a 'resilience delta', that takes into account both the shock done to a community by a disaster and the capacity of that community to rebound from that shock to return to its prior functionality. I show how different features of the community can create resilience, and consider how the developed and developing world addresses resilience. I also consider the role of focusing events in gaining attention to events and promoting change. I note that, while focusing events are considered by many in the disaster studies field to be major drivers of policy change in the United States disaster policy, most disasters have little effect on the overall doctrine of shared responsibilities between the national and subnational governments." (author's abstract

    Design, Manufacture and Test of Cryotank Components

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    On the composite cryotank technology development (CCTD) project, the Boeing Company built two cryotanks as a means of advancing technology and manufacturing readiness levels (TRL and MRL) and lowering the risk of fabricating full-scale fuel containment vessels.1 CCTD focused on upper stage extended duration applications where long term storage of propellants is required. The project involved the design, analysis, fabrication, and test of manufacturing demonstration units (MDU), a 2.4 m (precursor) and a 5.5 m composite cryotank. Key design features included one-piece wall construction to minimize overall weight (eliminating the need for a bellyband joint), 3-dimensionally (3D) reinforced y-joint material to alleviate stress concentrations at the tank to skirt interface and a purge-able uted core skirt to carry high axial launch loads. The tanks were made with OoA curing pre-impregnated (prepreg) carbon/epoxy (C/E) slit-tape tow (STT) that contained thin micro-crack resistant plies in the tank wall center to impede permeation. The tanks were fabricated at Boeing's Seattle-based Advanced Development Center (ADC) using RAFP and multipiece break-down tooling. The tooling was designed and built by Janicki Industries (JI) at Sedro Woolley, Washington. Tank assemblage consisted of co-bonded dome covers, one-piece uted core skirts and mechanical fastened cover/sump. Ultrasonic inspection was performed after every cure or bond and a structural health monitoring system (SHMS) was installed to identify potential impact damage events (in-process and/or during transportation). The tanks were low temperature tested at NASA's George C. Marshall Space Flight Center (MSFC) in Huntsville, Alabama. The testing, which consisted of a sequence of ll/drain pressure and thermal cycles using LH2, was successfully concluded in 2012 on the 2.4 m tank and in 2014 on the 5.5 m tank. Structural, thermal, and permeation performance data was obtained. 2 Critical design features and manufacturing advancements, which helped to validate 25% weight and 30% cost reduction projections, were matured. These advancements will help to guide future composite tank integration activities on next generation long duration aircraft and space launch vehicles. Because CCTD addressed innovative design features, heavy lift size scale-up, multipiece captured tooling, new generation automated material placement (AMP) equipment and OoA materials, this chapter should be of interest to educators, students and manufacturers of composite hardware and ight vehicles

    Ambiguity, multiple streams, and EU policy

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    The multiple streams framework draws insight from interactions between agency and institutions to explore the impact of context, time, and meaning on policy change and to assess the institutional and issue complexities permeating the European Union (EU) policy process. The authors specify the assumptions and structure of the framework and review studies that have adapted it to reflect more fully EU decision-making processes. The nature of policy entrepreneurship and policy windows are assessed to identify areas of improvement. Finally, the authors sketch out a research agenda that refines the logic of political manipulation which permeates the lens and the institutional complexity which frames the EU policy process

    During Disaster: Refining the Concept of Focusing Events to Better Explain Long-Duration Crises

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    Introduction The COVID-19 pandemic is one of the most significant public health crises in modern history, killing over 2 million people worldwide (Johns Hopkins, 2021). Unsurprisingly, a chorus of popular commentators has come to label it a “focusing event” capable of yielding broad social and political change across virtually every sector of society (Jenkins, 2020; Reville, 2020; Burgess, 2020; Olshan, 2020; Zenko, 2020). Jeremy Olshan (2020) of MarketWatch writes: “Social scientists say a c..

    Proportionate and disproportionate policy responses to climate change: core concepts and empirical applications

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    A fresh perspective on policy-making and planning has emerged which views disproportionate policy as an intentional policy response. A disproportionate policy response is understood to be a lack of‘fit’or balance between the costs of a public policy and the benefits that are derived from this policy, and between policy ends and means. This paper applies this new perspective on the proportionality of policy-making to the area of climate change. The first part of the paper discusses the underlying causes of disproportionate policy responses in broad terms and then applies the theoretical reasoning to understand the conditions in which they are likely to appear in relation to climate change. These conditions are hypothesized to relate to four main factors: economic considerations; levels of public demand; focusing events; and strategic considerations. It concludes with the suggestion that societal actors may be able to manipulate these four factors to encourage politicians to adopt policies that mitigate climate change more rapidly than is currently the case in most countries

    Matrix metalloproteinase-10 effectively reduces infarct size in experimental stroke by enhancing fibrinolysis via a thrombin-activatable fibrinolysis inhibitor-mediated mechanism

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    BACKGROUND: The fibrinolytic and matrix metalloproteinase (MMP) systems cooperate in thrombus dissolution and extracellular matrix proteolysis. The plasminogen/plasmin system activates MMPs, and some MMPs have been involved in the dissolution of fibrin by targeting fibrin(ogen) directly or by collaborating with plasmin. MMP-10 has been implicated in inflammatory/thrombotic processes and vascular integrity, but whether MMP-10 could have a profibrinolytic effect and represent a promising thrombolytic agent is unknown. METHODS AND RESULTS: The effect of MMP-10 on fibrinolysis was studied in vitro and in vivo, in MMP-10-null mice (Mmp10(-/-)), with the use of 2 different murine models of arterial thrombosis: laser-induced carotid injury and ischemic stroke. In vitro, we showed that MMP-10 was capable of enhancing tissue plasminogen activator-induced fibrinolysis via a thrombin-activatable fibrinolysis inhibitor inactivation-mediated mechanism. In vivo, delayed fibrinolysis observed after photochemical carotid injury in Mmp10(-/-) mice was reversed by active recombinant human MMP-10. In a thrombin-induced stroke model, the reperfusion and the infarct size in sham or tissue plasminogen activator-treated animals were severely impaired in Mmp10(-/-) mice. In this model, administration of active MMP-10 to wild-type animals significantly reduced blood reperfusion time and infarct size to the same extent as tissue plasminogen activator and was associated with shorter bleeding time and no intracranial hemorrhage. This effect was not observed in thrombin-activatable fibrinolysis inhibitor-deficient mice, suggesting thrombin-activatable fibrinolysis inhibitor inactivation as one of the mechanisms involved in the MMP-10 profibrinolytic effect. CONCLUSIONS: A novel profibrinolytic role for MMP-10 in experimental ischemic stroke is described, opening new pathways for innovative fibrinolytic strategies in arterial thrombosis

    Michigan molecular interactions r2: from interacting proteins to pathways

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    Molecular interaction data exists in a number of repositories, each with its own data format, molecule identifier and information coverage. Michigan molecular interactions (MiMI) assists scientists searching through this profusion of molecular interaction data. The original release of MiMI gathered data from well-known protein interaction databases, and deep merged this information while keeping track of provenance. Based on the feedback received from users, MiMI has been completely redesigned. This article describes the resulting MiMI Release 2 (MiMIr2). New functionality includes extension from proteins to genes and to pathways; identification of highlighted sentences in source publications; seamless two-way linkage with Cytoscape; query facilities based on MeSH/GO terms and other concepts; approximate graph matching to find relevant pathways; support for querying in bulk; and a user focus-group driven interface design. MiMI is part of the NIH's; National Center for Integrative Biomedical Informatics (NCIBI) and is publicly available at: http://mimi.ncibi.org

    Punctuated equilibrium theory in Brazilian public policy: the case of CearĂĄ

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    Este artigo faz uma anĂĄlise do processo de decisĂŁo orçamental dos municĂ­pios do Estado do CearĂĄ. AtravĂ©s deste estudo, procura-se perceber em que medida a distribuição dos orçamentos aos governos locais sofrem (ou nĂŁo) variaçÔes. JĂĄ em um segundo momento, tenta-se depreender quais as receitas de cada um dos municĂ­pios (as variĂĄveis independentes) que melhor descrevem e auxiliam a opção polĂ­tica de investimento local (esta serĂĄ a variĂĄvel dependente). Considerando o perĂ­odo de 2006 a 2010 e fazendo uso de um desenho de pesquisa de tipo transversal, conclui-se que nos governos locais do CearĂĄ o investimento pĂșblico apresenta perĂ­odos de estabilidade seguido por perĂ­odos de grande alteração dos orçamentos – confirmando a hipĂłtese de pesquisa. Estas conclusĂ”es confirmam os pressupostos da teoria do equilĂ­brio pontuado. Conclui-se igualmente que o investimento pĂșblico que vem sendo realizado Ă© dependente das transferĂȘncias que a UniĂŁo faz para os governos locais do Estado do CearĂĄ e das receitas de capital. Face a estas condiçÔes, Ă© pertinente equacionar atĂ© que nĂ­vel e grau o endividamento pode ocorrer em virtude da escassez cada vez maior do financiamento pĂșblico.This research aims to analyze the budget decision process in CearĂĄ municipalities in order to understand in which way budget distributions change (or not) during the research period under consideration. This research also aims to understand which revenues (the independent variables) of each municipality better expla in the political choices for local government investments (the dependent variable). Making use of data from 2006 to 2010 and using a cross - sectional research design, the study concludes a stability in local government investments periods of stress where su ch investments have both positive and negative significant fluctuations – confirming our working hypothesis. These results confirm punctuated Equilibrium Theory assumptions and also find that local government public investment is dependent on money transfe rs from the central government and also from capital revenues. Thus, it is important to question to what degree public indebtedness should be allowed, due to a scarcity of public fundsinfo:eu-repo/semantics/publishedVersio
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