4,419 research outputs found

    Convex probability domain of generalized quantum measurements

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    Generalized quantum measurements with N distinct outcomes are used for determining the density matrix, of order d, of an ensemble of quantum systems. The resulting probabilities are represented by a point in an N-dimensional space. It is shown that this point lies in a convex domain having at most d^2-1 dimensions.Comment: 7 pages LaTeX, one PostScript figure on separate pag

    Value co-creation with stakeholders using action research as a meta-methodology in a funded research project

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    © 2015 by the Project Management Institute. A large applied research study is a challenging exercise in project management and is often unpredictable because of its complexity. In the beginning, funding bodies, ethics committees, and participating organizations expect a plan of what is intended. As the research evolves, researchers must meet the expectations of stakeholders while being responsive to the emergent reality that the research faces and partly uncovers. This article describes action research used as an umbrella process that enabled us to manage the research project. We used action research as a meta-methodology-that is, a process that can subsume multiple subprocesses and under which these contradicting demands can be satisfied. In particular, two characteristics enable action research to do this. One is its cyclic process, iteratively tracing out a rhythm of planning, acting, and observing the results. The other is the nesting of its cycles, applied at scales ranging from the overall study to the moment-by-moment facilitation. We illustrate this use of action research with examples from a long-term applied study of leadership in faith-based, not-for-profit organizations

    Application of Scenario-based Approaches in Leadership Research: An Action Research Intervention as Three Sets of Interlinked Practices

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    © 2013, Springer Science+Business Media New York. This article illustrates how scenario planning (SP) and scenario analysis as can be conceptualised as practices contributing to an action research (AR) investigation of leadership development. The project described in this article was intended to strengthen leadership capacity in Australia’s rapidly changing aged care and community care sector. A research team comprising academics from three universities and managers from two faith-based not-for-profit organisations providing aged and community care participated in this study. As part of the research, two sets of scenario-based workshops were held: the first, to identify possible futures using SP; and the second, to deal with plausible scenarios these organisations are likely to face with the changes happening in the aged care environment in Australia by using scenario analysis. Although the researchers did not consider a link between practice theory and AR during the SP phase, practice theory became useful during the scenario analysis phase. The article includes a brief literature review followed by a discussion on the relationship between AR and practice theory. The processes used in the two sets of scenario workshops are then described in detail along with the data collected and analysed. The article concludes with some reflections on the use of scenarios in practice as well as an acknowledgment that practice theory would be useful in investigating leadership capability development

    Mobilising knowledge in complex health systems: a call to action

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    Worldwide, policymakers, health system managers, practitioners and researchers struggle to use evidence to improve policy and practice. There is growing recognition that this challenge relates to the complex systems in which we work. The corresponding increase in complexity-related discourse remains primarily at a theoretical level. This paper moves the discussion to a practical level, proposing actions that can be taken to implement evidence successfully in complex systems. Key to success is working with, rather than trying to simplify or control, complexity. The integrated actions relate to co-producing knowledge, establishing shared goals and measures, enabling leadership, ensuring adequate resourcing, contributing to the science of knowledge-to-action, and communicating strategically

    HST/WFC3 Observations of an Off-Nuclear Superbubble in Arp 220

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    We present a high spatial resolution optical and infrared study of the circumnuclear region in Arp 220, a late-stage galaxy merger. Narrowband imaging using HST/WFC3 has resolved the previously observed peak in Hα\alpha+[NII] emission into a bubble-shaped feature. This feature measures 1.6" in diameter, or 600 pc, and is only 1" northwest of the western nucleus. The bubble is aligned with the western nucleus and the large-scale outflow axis seen in X-rays. We explore several possibilities for the bubble origin, including a jet or outflow from a hidden active galactic nucleus (AGN), outflows from high levels of star formation within the few hundred pc nuclear gas disk, or an ultraluminous X-ray source. An obscured AGN or high levels of star formation within the inner \sim100 pc of the nuclei are favored based on the alignment of the bubble and energetics arguments.Comment: Accepted for publication in ApJ. 12 pages, 10 figure

    Genetic variation in the hypothalamic–pituitary–adrenal stress axis influences susceptibility to musculoskeletal pain: results from the EPIFUND study

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    <b>Objectives</b> To determine if genetic variation in genes in the hypothalamic–pituitary–adrenal (HPA) axis, the primary stress response system, influences susceptibility to developing musculoskeletal pain.<p></p> <b>Methods</b> Pain and comorbidity data was collected at three time points in a prospective population-based cohort study. Pairwise tagging single nucleotide polymorphisms (SNPs) were selected and genotyped for seven genes. Genetic association analysis was carried out using zero-inflated negative binomial regression to test for association between SNPs and the maximum number of pain sites across the three time points in participants reporting pain, reported as proportional changes with 95% CIs. SNPs were also tested for association with chronic widespread pain (CWP) using logistic regression reporting odds ratios and 95% CI.<p></p> <b>Results</b> A total of 75 SNPs were successfully genotyped in 994 participants including 164 cases with persistent CWP and 172 pain-free controls. Multiple SNPs in SERPINA6 were associated with the maximum number of pain sites; for example, each copy of the T allele of rs941601 was associated with having 16% (proportional change=1.16, 95% CI 1.04 to 1.28, p=0.006) more pain sites compared to participants with the CC genotype. SERPINA6 gene SNPs were also associated with CWP. Significant associations between the maximum number of pain sites and SNPs in the CRHBP and POMC genes were also observed and a SNP in MC2R was also associated with CWP. Associations between SNPs and comorbidity of poor sleep quality and depression explained some of the associations observed.<p></p> <b>Conclusions</b> Genetic variation in HPA axis genes was associated with musculoskeletal pain; however, some of the associations were explained by comorbidities. Replication of these findings is required in independent cohorts

    Soluble ADAM33 initiates airway remodeling to promote susceptibility for allergic asthma in early life

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    Asthma is a chronic inflammatory airways disease that usually begins in early life and involves gene-environment interactions. Although most asthma exhibits allergic inflammation, many allergic individuals do not have asthma. Here, we report how the asthma gene A Disintegrin and Metalloprotease (ADAM)33, acts as local tissue susceptibility gene that promotes allergic asthma. We show that enzymatically active soluble (s)ADAM33 is increased in asthmatic airways and plays a role in airway remodeling, independent of inflammation. Furthermore, remodeling and inflammation are both suppressed in Adam33 null mice after allergen challenge. When induced in utero or added ex vivo, sADAM33 causes structural remodeling of the airways, which enhances post-natal airway eosinophilia and bronchial hyperresponsiveness following sub-threshold challenge with an aeroallergen. This substantial gene-environment interaction helps to explain the end-organ expression of allergic asthma in genetically susceptible individuals. Finally, we show that sADAM33-induced airway remodeling is reversible, highlighting the therapeutic potential of targeting ADAM33 in asthma

    Examining the frequency and nature of gambling marketing in televised broadcasts of professional sporting events in the United Kingdom

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    Objective: Gambling operators in the United Kingdom have introduced a voluntary ban on adverts broadcast during televised sport before 21:00 (the 'whistle-to-whistle' ban). To inform debates around the potential effectiveness of this ban, we examine the frequency and nature of gambling marketing in televised broadcasts across professional sporting events. Study Design: Frequency analysis of verbal and visual gambling marketing references during television broadcasts of football (n=5), tennis, Formula 1, boxing and rugby union (each n=1) from 2018. Methods: For each gambling reference, we coded: whether it appeared in-play or out-of-play; location (e.g. pitch-side advertising); format (e.g. branded merchandise); duration (seconds); number of identical references visible simultaneously; brand; and presence of age restriction or harm reduction messages. Results: Boxing contained the most gambling references, on average, per broadcast minute (4.70 references), followed by football (2.75), rugby union (0.55), and tennis (0.11). Formula 1 contained no gambling references. In boxing, references most frequently appeared within the area-of-play. For football and rugby union, references most frequently appeared around the pitch border or within the area-of-play (e.g. branded shirts). Only a small minority of references were for adverts during commercial breaks that would be subject to the whistle-to-whistle ban(e.g. 2% of references in football). Less than 1% of references in boxing, and only 3% of references in football, contained age restriction or harm-reduction messages. Conclusions: As gambling sponsorship extends much beyond adverts in commercial breaks, the 'whistle-to-whistle' ban will have limited effect on gambling exposure. Gambling sponsorship activities rarely contain harm reduction messages
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