120 research outputs found

    Recovering the mundane practices of economic time

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    How exactly did the neoliberal imaginary that Konings describes gain so much traction? Was its speculative temporality smoothly translated into practice from the writings of Hayek and others as he suggests, or was its production a messier, more contested, and more contingent affair? In this brief commentary, I go back to one of the key historical moments that he examines, the Volcker shock of 1979-82, and examine some of the more mundane political and technical struggles that defined the early Reagan Administration’s efforts to put the neoliberal speculative logic into practice. By revealing the often-flawed material efforts that go into producing speculative temporalities, I argue that such struggles might allow us to arrive at a less teleological account of the resilience of neoliberalism

    A Search for Variability in Exoplanet Analogues and Low-Gravity Brown Dwarfs

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    We report the results of a JJ-band survey for photometric variability in a sample of young, low-gravity objects using the New Technology Telescope (NTT) and the United Kingdom InfraRed Telescope (UKIRT). Surface gravity is a key parameter in the atmospheric properties of brown dwarfs and this is the first large survey that aims to test the gravity dependence of variability properties. We do a full analysis of the spectral signatures of youth and assess the group membership probability of each target using membership tools from the literature. This results in a 30 object sample of young low-gravity brown dwarfs. Since we are lacking in objects with spectral types later than L9, we focus our statistical analysis on the L0-L8.5 objects. We find that the variability occurrence rate of L0-L8.5 low-gravity brown dwarfs in this survey is 30−8+16%30^{+16}_{-8}\%. We reanalyse the results of Radigan 2014 and find that the field dwarfs with spectral types L0-L8.5 have a variability occurrence rate of 11−4+13%11^{+13}_{-4}\%. We determine a probability of 98%98\% that the samples are drawn from different distributions. This is the first quantitative indication that the low-gravity objects are more likely to be variable than the field dwarf population. Furthermore, we present follow-up JSJ_S and KSK_S observations of the young, planetary-mass variable object PSO 318.5-22 over three consecutive nights. We find no evidence of phase shifts between the JSJ_S and KSK_S bands and find higher JSJ_S amplitudes. We use the JSJ_S lightcurves to measure a rotational period of 8.45±0.05 8.45\pm0.05~hr for PSO 318.5-22.Comment: accepted for publication in MNRA

    Does temporal and spatial segregation explain the complex population structure of humpback whales on the coast of West Africa?

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    Humpback whales (Megaptera novaeangliae) in the Southeastern Atlantic Ocean (International Whaling Commission ‘Breeding Stock B’—BSB) are distributed from the Gulf of Guinea to Western South Africa. Genetic data suggest that this stock may be sub-structured, but it remains unknown if this is due to reproductive segregation. This paper evaluates the spatial and temporal population structure of BSB humpback whales using a combination of maternally and bi-parentally inherited markers. The genetic differentiation that we identify in this study could be due to a combination of (1) spatial and/or temporal segregation on breeding grounds in the greater Gulf of Guinea, (2) the possibility of maternally inherited site fidelity to specific feeding grounds and (3) the use of two generalized but exclusive migratory routes (coastal and offshore) between feeding and breeding areas. Further, photo-identification and genetic sampling efforts in other areas of the Sub-Saharan Western Africa winter range and targeted deployment of satellite tags would help to clarify some of the apparent complexity in the population structure of animals biopsied in this region.National Research Foundation (South Africa) under Grant Number 2053539. I. Carvalho was supported by a PhD scholarship (SFRH/BD/18049/2004), from the Portuguese Foundation for Science and Technology (Fundação para a CiĂȘncia e Tecnologia—FCT).http://link.springer.com/journal/227hb201

    Audit and feedback and clinical practice guideline adherence: Making feedback actionable

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    BACKGROUND: As a strategy for improving clinical practice guideline (CPG) adherence, audit and feedback (A&F) has been found to be variably effective, yet A&F research has not investigated the impact of feedback characteristics on its effectiveness. This paper explores how high performing facilities (HPF) and low performing facilities (LPF) differ in the way they use clinical audit data for feedback purposes. METHOD: Descriptive, qualitative, cross-sectional study of a purposeful sample of six Veterans Affairs Medical Centers (VAMCs) with high and low adherence to six CPGs, as measured by external chart review audits. One-hundred and two employees involved with outpatient CPG implementation across the six facilities participated in one-hour semi-structured interviews where they discussed strategies, facilitators and barriers to implementing CPGs. Interviews were analyzed using techniques from the grounded theory method. RESULTS: High performers provided timely, individualized, non-punitive feedback to providers, whereas low performers were more variable in their timeliness and non-punitiveness and relied on more standardized, facility-level reports. The concept of actionable feedback emerged as the core category from the data, around which timeliness, individualization, non-punitiveness, and customizability can be hierarchically ordered. CONCLUSION: Facilities with a successful record of guideline adherence tend to deliver more timely, individualized and non-punitive feedback to providers about their adherence than facilities with a poor record of guideline adherence. Consistent with findings from organizational research, feedback intervention characteristics may influence the feedback's effectiveness at changing desired behaviors
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