3,829 research outputs found

    A Manual for Summer Bible School--An Experiment in Christian Education

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    The need and the demand for new materials, new approaches, and new techniques in Christian education has been growing with the increasingly renewed recognition of the importance of the individual and the psychological approach to him. The parochial school teachers have been leading the chorus of voices for more directed mediums of religious instruction, and rightly so

    Perinatal Air Pollutant Exposures and Autism Spectrum Disorder in the Children of Nurses’ Health Study II Participants

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    Objective: Air pollution contains many toxicants known to affect neurological function and to have effects on the fetus in utero. Recent studies have reported associations between perinatal exposure to air pollutants and autism spectrum disorder (ASD) in children. We tested the hypothesis that perinatal exposure to air pollutants is associated with ASD, focusing on pollutants associated with ASD in prior studies. Methods: We estimated associations between U.S. Environmental Protection Agency–modeled levels of hazardous air pollutants at the time and place of birth and ASD in the children of participants in the Nurses’ Health Study II (325 cases, 22,101 controls). Our analyses focused on pollutants associated with ASD in prior research. We accounted for possible confounding and ascertainment bias by adjusting for family-level socioeconomic status (maternal grandparents’ education) and census tract–level socioeconomic measures (e.g., tract median income and percent college educated), as well as maternal age at birth and year of birth. We also examined possible differences in the relationship between ASD and pollutant exposures by child’s sex. Results: Perinatal exposures to the highest versus lowest quintile of diesel, lead, manganese, mercury, methylene chloride, and an overall measure of metals were significantly associated with ASD, with odds ratios ranging from 1.5 (for overall metals measure) to 2.0 (for diesel and mercury). In addition, linear trends were positive and statistically significant for these exposures (p < .05 for each). For most pollutants, associations were stronger for boys (279 cases) than for girls (46 cases) and significantly different according to sex. Conclusions: Perinatal exposure to air pollutants may increase risk for ASD. Additionally, future studies should consider sex-specific biological pathways connecting perinatal exposure to pollutants with ASD

    Bird pollination of Canary Island endemic plants

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    The Canary Islands are home to a guild of endemic, threatened bird pollinated plants. Previous work has suggested that these plants evolved floral traits as adaptations to pollination by flower specialist sunbirds, but subsequently they appear to be have co-opted passerine birds as sub-optimal pollinators. To test this idea we carried out a quantitative study of the pollination biology of three of the bird pollinated plants, Canarina canariensis (Campanulaceae), Isoplexis canariensis (Veronicaceae) and Lotus berthelotii (Fabaceae), on the island of Tenerife. Using colour vision models, we predicted the detectability of flowers to bird and bee pollinators. We measured pollinator visitation rates, nectar standing crops, as well as seed set and pollen removal and deposition. These data showed that the plants are effectively pollinated by non-flower specialist passerine birds that only occasionally visit flowers. The large nectar standing crops and extended flower longevities (&#x3e;10days) of Canarina and Isoplexis suggests that they have evolved bird pollination system that effectively exploits these low frequency non-specialist pollen vectors and is in no way suboptimal. Seed set in two of the three species was high, and was significantly reduced or zero in flowers where pollinator access was restricted. In L. berthelotii, however, no fruit set was observed, probably because the plants were self incompatible horticultural clones of a single genet. We also show that, while all three species are easily detectable for birds, the orange Canarina and the red Lotus (but less so the yellow-orange Isoplexis) should be difficult to detect for insect pollinators without specialised red receptors, such as bumblebees. Contrary to expectations if we accept that the flowers are primarily adapted to sunbird pollination, the chiffchaff (Phylloscopus canariensis) was an effective pollinator of these species

    Governing the Pandemic

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    This open access book offers unique insights into how governments and governing systems, particularly in advanced economies, have responded to the immense challenges of managing the coronavirus pandemic and the ensuing disease COVID-19. Written by three eminent scholars in the field of the politics and policy of crisis management, it offers a unique ‘bird’s eye’ view of the immense logistical and political challenges of addressing a worst-case scenario that would prove the ultimate stress test for societies, governments, governing institutions and political leaders. It examines how governments and governing systems have (i) made sense of emerging transboundary threats that have spilled across health, economic, political and social systems (ii) mobilised systems of governance and often fearful and sceptical citizens (iii) crafted narratives amid high uncertainty about the virus and its impact and (iv) are working towards closure and a return to ‘normal’ when things can never quite be the same again. The book also offers the building blocks of pathways to future resilience. Succeeding and failing in all these realms is tied in with governance structures, experts, trust, leadership capabilities and political ideologies. The book appeals to anyone seeking to understand ‘what’s going on?’, but particularly academics and students across multiple disciplines, journalists, public officials, politicians, non-governmental organisations and citizen groups

    Quantifying the Impact of Water Abstraction for Low Head ‘Run of the River’ Hydropower on Localized River Channel Hydraulics and Benthic Macroinvertebrates

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    ‘Run of the river’ (ROR) hydropower schemes have undergone a recent resurgence in Europe, and with legislation requiring the protection and enhancement of the physical and ecological condition of European rivers, there is a need to understand the impacts of these schemes. This paper presents an assessment of the eco-hydraulic impact of a ROR hydropower scheme in the Peak District National Park, UK. Due to the ponded nature of the depleted stretch at the study site, this paper focuses on the characterization of the hydraulic impact of water abstraction for a ROR scheme at the hydropower outlet and samples microhabitats of benthic macroinvertebrates within the hydraulically affected zones. Measurement of hydraulic transects shows that the scheme's operation notably alters river channel hydraulics at 60% of water depth, whilst impacts are much less distinct in close proximity to the river bed. We identify eco-hydraulic relationships between benthic macroinvertebrate communities and localized near-bed velocity and turbulence conditions, thus indicating the potential for water abstraction by ROR schemes to impact lower trophic levels of riverine ecosystems. However, spatial patch-scale (10–100 m2) meso-habitat comparisons of invertebrate communities around the hydropower outlet showed only subtle differences, suggesting that in this case benthic communities are only minimally impacted by the ROR scheme

    Hibernate: A Full Object Relational Mapping Service

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    AbstrAct This chapter presents a brief overview of the object/relational mapping service known a

    Governing the Pandemic

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    This open access book offers unique insights into how governments and governing systems, particularly in advanced economies, have responded to the immense challenges of managing the coronavirus pandemic and the ensuing disease COVID-19. Written by three eminent scholars in the field of the politics and policy of crisis management, it offers a unique ‘bird’s eye’ view of the immense logistical and political challenges of addressing a worst-case scenario that would prove the ultimate stress test for societies, governments, governing institutions and political leaders. It examines how governments and governing systems have (i) made sense of emerging transboundary threats that have spilled across health, economic, political and social systems (ii) mobilised systems of governance and often fearful and sceptical citizens (iii) crafted narratives amid high uncertainty about the virus and its impact and (iv) are working towards closure and a return to ‘normal’ when things can never quite be the same again. The book also offers the building blocks of pathways to future resilience. Succeeding and failing in all these realms is tied in with governance structures, experts, trust, leadership capabilities and political ideologies. The book appeals to anyone seeking to understand ‘what’s going on?’, but particularly academics and students across multiple disciplines, journalists, public officials, politicians, non-governmental organisations and citizen groups

    Aboutness : a logico-philosophical analysis

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    Thesis (Ph. D.)--Michigan State University. Department of Philosophy, 1981Includes bibliographical references (pages 111-112
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