557 research outputs found

    Asset-pooling in uncertain times : implications of small-group farming for agricultural restructuring in the Kyrgyz Republic

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    Substantial theoretical and policy debate in the early 1990s led to an excessive focus on de-collectivisation and individualisation of land rights through privatisation across the former communist bloc. The objective of this paper is to examine “individualised” production systems more closely in order to understand better how certain specific organisational approaches to production differ with respect to a set of indicators of technical efficiency. In this paper we provide quantitative analysis of these new types of farming units and provide a rationale for a deeper exploration into the nature of these groups. Overall we find that the total factor productivity of small groups formed on familial and social ties is higher than that of individual farms, given the uncertain rural environment in Kyrgyzstan and the resource constraints facing landholders at this point in time. The explanation for this hinges primarily on understanding the assetpooling, risk-sharing and labour specialisation functions of groups. In-depth qualitative fieldwork performed in conjunction with this study confirms these explanations (see Sabates-Wheeler 2004). As transition agriculture continues to adapt to land reform choices that were made ten years ago, a major policy question facing the Kyrgyz government must be, what kind of agrarian structure should be facilitated in order to promote agricultural growth? Despite the push for de-collectivisation there remains a place for encouraging group farming, on grounds of both poverty alleviation and agricultural growth. Keywords: Kyrgyzstan; agricultural restructuring; asset-pooling

    Habilitation provision for children and young people with vision impairment in the United Kingdom: A lack of clarity leading to inconsistencies

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    The key to empowering and supporting children and young people (CYP) with vision impairment (VI) to achieve their potential lies in the delivery of habilitation training. Evidence has revealed that provision of habilitation services across the United Kingdom was inconsistent, with CYP with VI not receiving services in some areas. This research explored the accessibility and quality of habilitation provision for CYP with VI via two studies: (1) 12 qualitative case studies of habilitation practice and (2) surveys of habilitation training experiences, with CYP with VI (n = 43) and with parents of CYP with VI (n = 68). Five themes were identified highlighting inconsistencies and variability in the delivery of habilitation training in recent years, a lack of focus on independent living skills training, on social inclusion and emotional well-being, a lack of support for parents and a lack of clarity with regard to the definition of habilitation, and who is responsible for providing training

    Multi-Messenger Astronomy with Extremely Large Telescopes

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    The field of time-domain astrophysics has entered the era of Multi-messenger Astronomy (MMA). One key science goal for the next decade (and beyond) will be to characterize gravitational wave (GW) and neutrino sources using the next generation of Extremely Large Telescopes (ELTs). These studies will have a broad impact across astrophysics, informing our knowledge of the production and enrichment history of the heaviest chemical elements, constrain the dense matter equation of state, provide independent constraints on cosmology, increase our understanding of particle acceleration in shocks and jets, and study the lives of black holes in the universe. Future GW detectors will greatly improve their sensitivity during the coming decade, as will near-infrared telescopes capable of independently finding kilonovae from neutron star mergers. However, the electromagnetic counterparts to high-frequency (LIGO/Virgo band) GW sources will be distant and faint and thus demand ELT capabilities for characterization. ELTs will be important and necessary contributors to an advanced and complete multi-messenger network.Comment: White paper submitted to the Astro2020 Decadal Surve

    Chronic kidney disease and arrhythmias: conclusions from a Kidney Disease: Improving Global Outcomes (KDIGO) Controversies Conference.

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    Patients with chronic kidney disease (CKD) are predisposed to heart rhythm disorders, including atrial fibrillation (AF)/atrial flutter, supraventricular tachycardias, ventricular arrhythmias, and sudden cardiac death (SCD). While treatment options, including drug, device, and procedural therapies, are available, their use in the setting of CKD is complex and limited. Patients with CKD and end-stage kidney disease (ESKD) have historically been under-represented or excluded from randomized trials of arrhythmia treatment strategies,1 although this situation is changing.2 Cardiovascular society consensus documents have recently identified evidence gaps for treating patients with CKD and heart rhythm disorders [...

    Evolutionary genomics of a cold-adapted diatom: Fragilariopsis cylindrus

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    The Southern Ocean houses a diverse and productive community of organisms1, 2. Unicellular eukaryotic diatoms are the main primary producers in this environment, where photosynthesis is limited by low concentrations of dissolved iron and large seasonal fluctuations in light, temperature and the extent of sea ice3, 4, 5, 6, 7. How diatoms have adapted to this extreme environment is largely unknown. Here we present insights into the genome evolution of a cold-adapted diatom from the Southern Ocean, Fragilariopsis cylindrus8, 9, based on a comparison with temperate diatoms. We find that approximately 24.7 per cent of the diploid F. cylindrus genome consists of genetic loci with alleles that are highly divergent (15.1 megabases of the total genome size of 61.1 megabases). These divergent alleles were differentially expressed across environmental conditions, including darkness, low iron, freezing, elevated temperature and increased CO2. Alleles with the largest ratio of non-synonymous to synonymous nucleotide substitutions also show the most pronounced condition-dependent expression, suggesting a correlation between diversifying selection and allelic differentiation. Divergent alleles may be involved in adaptation to environmental fluctuations in the Southern Ocean

    Physiological Correlates of Volunteering

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    We review research on physiological correlates of volunteering, a neglected but promising research field. Some of these correlates seem to be causal factors influencing volunteering. Volunteers tend to have better physical health, both self-reported and expert-assessed, better mental health, and perform better on cognitive tasks. Research thus far has rarely examined neurological, neurochemical, hormonal, and genetic correlates of volunteering to any significant extent, especially controlling for other factors as potential confounds. Evolutionary theory and behavioral genetic research suggest the importance of such physiological factors in humans. Basically, many aspects of social relationships and social activities have effects on health (e.g., Newman and Roberts 2013; Uchino 2004), as the widely used biopsychosocial (BPS) model suggests (Institute of Medicine 2001). Studies of formal volunteering (FV), charitable giving, and altruistic behavior suggest that physiological characteristics are related to volunteering, including specific genes (such as oxytocin receptor [OXTR] genes, Arginine vasopressin receptor [AVPR] genes, dopamine D4 receptor [DRD4] genes, and 5-HTTLPR). We recommend that future research on physiological factors be extended to non-Western populations, focusing specifically on volunteering, and differentiating between different forms and types of volunteering and civic participation

    LeishGEM: genome-wide deletion mutant fitness and protein localisations in Leishmania

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    LeishGEM is a genome-wide functional annotation community resource for Leishmania mexicana, where deletion mutant growth in vitro and in vivo is measured and protein localisation is determined by endogenous tagging and LOPIT-DC (localisation of organelle proteins by isotope tagging with differential centrifugation) spatial proteomics. Data are being made available pre-publication via http://leishgem.org which allows data-driven identification of the mechanisms for Leishmania parasitism
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