3,961 research outputs found

    There’s More That Binds Us Together Than Separates Us : Exploring the Role of Prison-University Partnerships in Promoting Democratic Dialogue, Transformative Learning Opportunities and Social Citizenship

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    In this paper we argue that education – particularly higher education (HE) - has the potential to offer socially, economically and culturally transformative learning opportunities–cornerstones of social citizenship. Yet, for prisoners, the opportunity to engage in HE as active citizens is often limited. Using a Freirean model of democratic, pedagogic participatory dialogue, we designed a distinctive prison-University partnership in which prison-based learners and undergraduate students studied together. The parallel small-scale ethnographic study, reported here, explored how stereotypes and ‘Othering’ - which compromise social citizenship - could be challenged through dialogue and debate. Evidence from this study revealed a positive change in ‘de-othering’ attitudes of participants was achieved. Furthermore, participants reported growth in their sense of empowerment, agency, and autonomy–cornerstones of social citizenship. Findings from this study contribute further evidence to the developing body of knowledge on the value of partnerships and dialogue in prison education. We conclude that policy makers, and respective institutions, need to work harder to establish prison-University partnerships, thus providing the space for real talk to take place

    Synthesis and structural analysis of the N-terminal domain of the thyroid hormone-binding protein transthyretin

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    Transthyretin (TTR) is a 55 kDa protein responsible for the transport of thyroid hormones and retinol in human serum. Misfolded forms of the protein are implicated in the amyloid diseases familial amyloidotic polyneuropathy and senile systemic amyloidosis. Its folding properties and stabilization by ligands are of current interest due to their importance in understanding and combating these diseases. To assist in such studies we developed a method for the solid phase synthesis of the monomeric unit of a TTR analogue and its folding to form a functional 55 kDa tetramer. The monomeric unit of the protein was chemically synthesized in three parts, comprising amino acid residues 151, 5499 and 102127, and ligated using chemoselective thioether ligation chemistry. The synthetic protein was folded and assembled to a tetrameric structure in the presence of the TTRs native ligand, thyroxine, as shown by gel filtration chromatography, native gel electrophoresis, TTR antibody recognition and thyroid hormone binding. In the current study the solution structure of the first of these fragment peptides, TTR(151) is examined to determine its intrinsic propensity to form beta-sheet structure, potentially involved in amyloid fibril formation by TTR. Despite the presence of extensive beta-structure in the native form of the protein, the Nterminal fragment adopts an essentially random coil conformation in solution

    Chemical variation in a dominant tree species: population divergence, selection and genetic stability across environments

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    Understanding among and within population genetic variation of ecologically important plant traits provides insight into the potential evolutionary processes affecting those traits. The strength and consistency of selection driving variability in traits would be affected by plasticity in differences among genotypes across environments (G×E). We investigated population divergence, selection and environmental plasticity of foliar plant secondary metabolites (PSMs) in a dominant tree species, Eucalyptus globulus. Using two common garden trials we examined variation in PSMs at multiple genetic scales; among 12 populations covering the full geographic range of the species and among up to 60 families within populations. Significant genetic variation in the expression of many PSMs resides both among and within populations of E. globulus with moderate (e.g., sideroxylonal A h2op = 0.24) to high (e.g., macrocarpal G h2op = 0.48) narrow sense heritabilities and high coefficients of additive genetic variation estimated for some compounds. A comparison of Qst and Fst estimates suggest that variability in some of these traits may be due to selection. Importantly, there was no genetic by environment interaction in the expression of any of the quantitative chemical traits despite often significant site effects. These results provide evidence that natural selection has contributed to population divergence in PSMs in E. globulus, and identifies the formylated phloroglucinol compounds (particularly sideroxylonal) and a dominant oil, 1,8-cineole, as candidates for traits whose genetic architecture has been shaped by divergent selection. Additionally, as the genetic differences in these PSMs that influence community phenotypes is stable across environments, the role of plant genotype in structuring communities is strengthened and these genotypic differences may be relatively stable under global environmental changes

    An Autoethnographic Self-Study Navigating the Transition to Becoming a STEM Teacher Educator

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    This paper reports on a self-study where I take an autoethnographic stance in narrating my cultural origins, trajectory and identities as a teacher turned teacher educator working in the field of education in Ireland. Using self-study, I explore how my habitus has influenced my experiences of being a biology teacher at second level to teaching STEM education on initial teacher education programmes. Autoethnographic self-study is the hybrid approach used to describe and systematically analyse my experiences and learning as I struggle with a transitioning identity. The integrated use of both self-study and autoethnographic approaches enabled a deepened understanding of my professional practice and my embedded professional identity. Emergent findings from inductive analysis of multiple data sources from students, colleagues and my own reflections on my practice provide opportunities for rich description on three key domains. I present how reflection on the cultural self can lead to personal/professional growth and how seeing and hearing beyond my “self” facilitates significant and holistic professional learning. Finally, I discuss how my professional growth or stagnation as a STEM practitioner is predicated and mediated by meaningful collaboration with others

    Quarterly U.S. unemployment: cycles, seasons and asymmetries

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    This paper documents three stylized facts for the quarterly unemployment rate in the United States. Firstly, unemployment is asymmetric over the business cycle, i.e. it rises sharply in recessions and it falls slowly in expansions. Secondly, its seasonal fluctuations are not constant across the two business cycle stages in the sense that there is less seasonality in recession periods. Thirdly, the effect of shocks to the unemployment rate in expansions seem transitory, while this effect is permanent in recessions. Some implications of these stylized facts for empirical macroeconomics and seasonal adjustment are discussed

    Isotocin neuronal phenotypes differ among social systems in cichlid fishes

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    Social living has evolved numerous times across a diverse array of animal taxa. An open question is how the transition to a social lifestyle has shaped, and been shaped by, the underlying neurohormonal machinery of social behaviour. The nonapeptide neurohormones, implicated in the regulation of social behaviours, are prime candidates for the neuroendocrine substrates of social evolution. Here, we examined the brains of eight cichlid fish species with divergent social systems, comparing the number and size of preoptic neurons that express the nonapeptides isotocin and vasotocin. While controlling for the influence of phylogeny and body size, we found that the highly social cooperatively breeding species (n = 4) had fewer parvocellular isotocin neurons than the less social independently breeding species (n = 4), suggesting that the evolutionary transition to group living and cooperative breeding was associated with a reduction in the number of these neurons. In a complementary analysis, we found that the size and number of isotocin neurons significantly differentiated the cooperatively breeding from the independently breeding species. Our results suggest that isotocin is related to sociality in cichlids and may provide a mechanistic substrate for the evolution of sociality

    A Collaborative Self-Study: Reflections on Convening a SoTL Community of Practice

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    Communities of practice (CoPs) can provide opportunities for diverse and inclusive groups to convene, share, collaborate, and support others. Using a self-study research approach combined with a visual research method, this study explores both scholarly and practice-based insights to describe the anticipated attributes of a high functioning CoP for the support of collaborative engagement in Scholarship of Teaching and Learning (SoTL). The following nine emergent attributes are identified: 1) Structures; (2) Social environments; (3) Diversity; (4) Knowledge, learning and ideas; (5) Support; (6) Shared leadership; (7) Risk; (8) Results and impact; and (9) Growth over time. This study contributes to the growing body of knowledge related to the value of visual research methods in collaborative self-study. Moreover, the results of this self-study deepen understanding about the practice and role of convenors and organizers of a grass-roots, campus-wide SoTL CoP initiative

    Attention-dependent modulation of cortical taste circuits revealed by granger causality with signal-dependent noise

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    We show, for the first time, that in cortical areas, for example the insular, orbitofrontal, and lateral prefrontal cortex, there is signal-dependent noise in the fMRI blood-oxygen level dependent (BOLD) time series, with the variance of the noise increasing approximately linearly with the square of the signal. Classical Granger causal models are based on autoregressive models with time invariant covariance structure, and thus do not take this signal-dependent noise into account. To address this limitation, here we describe a Granger causal model with signal-dependent noise, and a novel, likelihood ratio test for causal inferences. We apply this approach to the data from an fMRI study to investigate the source of the top-down attentional control of taste intensity and taste pleasantness processing. The Granger causality with signal-dependent noise analysis reveals effects not identified by classical Granger causal analysis. In particular, there is a top-down effect from the posterior lateral prefrontal cortex to the insular taste cortex during attention to intensity but not to pleasantness, and there is a top-down effect from the anterior and posterior lateral prefrontal cortex to the orbitofrontal cortex during attention to pleasantness but not to intensity. In addition, there is stronger forward effective connectivity from the insular taste cortex to the orbitofrontal cortex during attention to pleasantness than during attention to intensity. These findings indicate the importance of explicitly modeling signal-dependent noise in functional neuroimaging, and reveal some of the processes involved in a biased activation theory of selective attention
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