170 research outputs found

    Postsecularity, political resistance, and protest in the Occupy Movement

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    This paper examines and critically interprets the interrelations between religion and the Occupy movements of 2011. It presents three main arguments. First, through an examination of the Occupy Movement in the UK and USA—and in particular of the two most prominent Occupy camps (Wall Street and London Stock Exchange)—the paper traces the emergence of postsecularity evidenced in the rapprochement of religious and secular actors, discourses, and practices in the event-spaces of Occupy. Second, it examines the specific set of challenges that Occupy has posed to the Christian church in the UK and USA, arguing that religious participation in the camps served at least in part to identify wider areas of religious faith that are themselves in need of redemption. Third, the paper considers the challenges posed by religious groups to Occupy, not least in the emphasis on postmaterial values in pathways to resistance against contemporary capitalism

    The Golden Ratio in Nature: A Tour Across Length Scales

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    The Golden ratio is an irrational number that has a tendency to appear in many different scientific and artistic fields. It may be found in natural phenomena across a vast range of length scales; from galactic to atomic. In this review, the mathematical properties of the Golden ratio are discussed before exploring where in nature it is claimed to appear; beginning at astronomical scales and progressing to smaller lengths, until reaching those of atomic and quantum physics. For each phenomenon discussed, the evidence for the presence of the Golden ratio is assessed. In making such a tour across length scales, it is illustrated just how prevalent this single number is within the natural universe

    Patch area and uniform sampling on the surface of any ellipsoid

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    Algorithms for generating uniform random points on a triaxial ellipsoid are non-trivial to verify because of the non-analytical form of the surface area. In this paper, a formula for the surface area of an ellipsoidal patch is derived in the form of a one-dimensional numerical integration problem, where the integrand is expressed using elliptic integrals. In addition, analytical formulae were obtained for the special case of a spheroid. The triaxial ellipsoid formula was used to calculate patch areas to investigate a set of surface sampling algorithms. Particular attention was paid to the efficiency of these methods. The results of this investigation show that the most efficient algorithm depends on the required coordinate system. For Cartesian coordinates, the gradient rejection sampling algorithm of Chen and Glotzer is best suited to this task, when paired with Marsaglia’s method for generating points on a unit sphere. For outputs in polar coordinates, it was found that a surface area rejection sampler is preferable

    Adaptive selection signatures in river buffalo with emphasis on immune and major histocompatibility complex genes

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    River buffalo is an agriculturally important species with many traits, such as disease tolerance, which promote its use worldwide. Highly contiguous genome assemblies of the river buffalo, goat, pig, human and two cattle subspecies were aligned to study gene gains and losses and signs of positive selection. The gene families that have changed significantly in river buffalo since divergence from cattle play important roles in protein degradation, the olfactory receptor system, detoxification and the immune system. We used the branch site model in PAML to analyse single-copy orthologs to identify positively selected genes that may be involved in skin differentiation, mammary development and bone formation in the river buffalo branch. The high contiguity of the genomes enabled evaluation of differences among species in the major histocompatibility complex. We identified a Babesia-like L1 LINE insertion in the DRB1-like gene in the river buffalo and discuss the implication of this finding

    Non-destructive, high-content analysis of wheat grain traits using X-ray micro computed tomography

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    Background: Wheat is the most widely grown crop in temperate climates for food and animal feed. In order to meet the demands of the predicted population increase in an ever-changing climate, wheat production needs to dramatically increase. Spike and grain traits are critical determinants of final yield and grain uniformity a commercially desired trait, but their analysis is laborious and often requires destructive harvest. One of the current challenges is to develop an accurate, non-destructive method for spike and grain trait analysis capable of handling large populations. Results: In this study we describe the development of a robust method for the accurate extraction and measurement of spike and grain morphometric parameters from images acquired by X-ray micro-computed tomography (?CT). The image analysis pipeline developed automatically identiies plant material of interest in ?CT images, performs image analysis, and extracts morphometric data. As a proof of principle, this integrated methodology was used to analyse the spikes from a population of wheat plants subjected to high temperatures under two diferent water regimes. Temperature has a negative efect on spike height and grain number with the middle of the spike being the most afected region. The data also conirmed that increased grain volume was correlated with the decrease in grain number under mild stress. Conclusions: Being able to quickly measure plant phenotypes in a non-destructive manner is crucial to advance our understanding of gene function and the efects of the environment. We report on the development of an image analysis pipeline capable of accurately and reliably extracting spike and grain traits from crops without the loss of positional information. This methodology was applied to the analysis of wheat spikes can be readily applied to other economically important crop species.publishersversionPeer reviewe

    Evolutionary Drivers of Protein Shape

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    Diffusional motion within the crowded environment of the cell is known to be crucial to cellular function as it drives the interactions of proteins. However, the relationships between protein diffusion, shape and interaction, and the evolutionary selection mechanisms that arise as a consequence, have not been investigated. Here, we study the dynamics of triaxial ellipsoids of equivalent steric volume to proteins at different aspect ratios and volume fractions using a combination of Brownian molecular dynamics and geometric packing. In general, proteins are found to have a shape, approximately Golden in aspect ratio, that give rise to the highest critical volume fraction resisting gelation, corresponding to the fastest long-time self-diffusion in the cell. The ellipsoidal shape also directs random collisions between proteins away from sites that would promote aggregation and loss of function to more rapidly evolving nonsticky regions on the surface, and further provides a greater tolerance to mutation

    Claircity project: Citizen-led scenarios to improve air quality in European cities

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    © 2018 WIT Press. Air pollution has as significant impact on the health of European citizens, particularly in urban areas, and was responsible for more than 400,000 premature deaths in Europe in 2014. It is within our cities where this public health impact is most acute as high population densities and high ambient concentrations result in an increased risk of exposure. This health impact is further exacerbated as air pollution interacts with other social determinants of health creating a disproportionate risk and burden. Traditional top-down government policy development and consultation, married with a very techno-centric view of air pollution sources and solutions, has resulted in a general apathy among citizens towards the problem of air pollution and subsequently a lack of ownership of the solutions. The ClairCity Project aims to create a major shift in public understanding towards the causes of poor air quality, inviting citizens to give their opinions on air pollution and carbon reduction policies to shape the cities of the future. By putting citizens' behaviour and activities at the heart of policy making for air quality and carbon management, ClairCity has utilised a suite of innovative toolkits for enhanced quantification and citizen engagement (such as surveys, workshops, online games and apps) to assess the public acceptability of specific policies and also to enable a bottom-up, citizen-led scenario creation process whereby citizens are empowered to visualise clean, low carbon, healthy futures for their city

    Surface Zeta Potential and Diamond Seeding on Gallium Nitride Films.

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    The measurement of ζ potential of Ga-face and N-face gallium nitride has been carried out as a function of pH. Both of the faces show negative ζ potential in the pH range 5.5-9. The Ga-face has an isoelectric point at pH 5.5. The N-face shows a more negative ζ potential due to larger concentration of adsorbed oxygen. The ζ potential data clearly showed that H-terminated diamond seed solution at pH 8 will be optimal for the self-assembly of a monolayer of diamond nanoparticles on the GaN surface. The subsequent growth of thin diamond films on GaN seeded with H-terminated diamond seeds produced fully coalesced films, confirming a seeding density in excess of 1011 cm-2. This technique removes the requirement for a low thermal conduction seeding layer like silicon nitride on GaN
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