748 research outputs found

    Sociotropy, Autonomy, and Self-Discrepancy: Status in Depressed, Remitted Depressed, and Control Participants

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    Examined the status of sociotropy, autonomy, and self-discrepancy in 28 clinically depressed (mean age 37.5 yrs), 20 remitted depressed (mean age 37 yrs), and 20 control individuals (mean age 30 yrs). Results from the Personal Style Inventory (PSI; C. J. Robins et al, 1990) and the Selves Questionnaire (E. T. Higgins et al, 1986) indicated that depressed, remitted, and control participants differed significantly in their levels of sociotropy, autonomy, and actual–ideal discrepancy. Depressed Ss evidencing the highest levels of these variables, remitted Ss the next highest, and control Ss the lowest. Both sociotropy and autonomy were significantly correlated with actual–ideal discrepancy. Each of the 3 variables studied accounted for unique variance in current depression. Together they accounted for 48% of the variance in depression scores. This study provides support for the relation of sociotropy, autonomy, and actual–ideal discrepancy to depression, and suggests a need for greater attention to issues of availability and accessibility in the area of depression research

    An empirical study of the “prototype walkthrough”: a studio-based activity for HCI education

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    For over a century, studio-based instruction has served as an effective pedagogical model in architecture and fine arts education. Because of its design orientation, human-computer interaction (HCI) education is an excellent venue for studio-based instruction. In an HCI course, we have been exploring a studio-based learning activity called the prototype walkthrough, in which a student project team simulates its evolving user interface prototype while a student audience member acts as a test user. The audience is encouraged to ask questions and provide feedback. We have observed that prototype walkthroughs create excellent conditions for learning about user interface design. In order to better understand the educational value of the activity, we performed a content analysis of a video corpus of 16 prototype walkthroughs held in two HCI courses. We found that the prototype walkthrough discussions were dominated by relevant design issues. Moreover, mirroring the justification behavior of the expert instructor, students justified over 80 percent of their design statements and critiques, with nearly one-quarter of those justifications having a theoretical or empirical basis. Our findings suggest that PWs provide valuable opportunities for students to actively learn HCI design by participating in authentic practice, and provide insight into how such opportunities can be best promoted

    Projection results for the k-partition problem

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    The k-partition problem is an NP-hard combinatorial optimisation problem with many applications. Chopra and Rao introduced two integer programming formulations of this problem, one having both node and edge variables, and the other having only edge variables. We show that, if we take the polytopes associated with the ‘edge-only’ formulation, and project them into a suitable subspace, we obtain the polytopes associated with the ‘node-and-edge’ formulation. This result enables us to derive new valid inequalities and separation algorithms, and also to shed new light on certain SDP relaxations. Computational results are also presented

    The crisis of public sector trade unionism: evidence from the Mid Staffordshire hospital crisis

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    This article contends that there is a growing, if uneven, crisis in public sector trade unionism masked by relatively high membership figures that obscure a weakening of trade unions in the workplace, leaving hollowed out organisation vulnerable to further legislative and employer-led onslaughts. The weakening is not inevitable but to overcome it requires a refocusing of organising efforts on the everyday concerns of members such as understaffing and the provision of better public services. Only with an engaged membership will national issues and wider campaigns have material force. Having outlined a general argument, the article takes as illustrative the nature and performance of trade unions, and particularly UNISON, during the Mid Staffordshire hospital crisis

    Impacts of colistin sulfate on fecal Escherichia coli resistance and on growth performance of piglets in a post-weaning diarrhea model

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    Colistin sulfate (CS) is used in Canada for the treatment of post weaning diarrhea (PWD), to overcome conventional therapeutic antibiotics failures. The aim of the present study was to determine the effect of a conventional oral regimen of CS for the treatment of PWD, on the development of E. coli CS resistance and to evaluate the effect of ETEC: F4 infection on CS intestinal absorption. A total of 48 pigs were used, challenge was carried out by oral administration of 109CFU of a hemolytic ETEC: F4 strain resistant to nalidixic acid. CS was administered at a dose of 50.000 UI/kg twice a day for 5 days. Feces were examined clinically and bacteriologically before and after challenge to evaluate presence of diarrhea and E. coli fecal excretion. ETEC: F4 virulence factors were monitored and CS plasma concentrations were quantified by an HPLC-MS/MS. From one until six days after CS administration, a significant reduction in the fecal excretion of ETEC: F4, total E. coli, ETEC: F4 virulence factors and in diarrhea scores was observed in the challenged treated group compared to the challenged untreated group (p\u3c0.0001). No significant difference in growth performances was observed in treated compared to non-treated pigs (p\u3e0.71). A significant selection pressure on E. coli total population was observed following CS treatment (p\u3c0.0001). Challenge with ETEC: F4 resulted in an increase in intestinal absorption of CS. Our study is the first to demonstrate in an experimental model of PWD, that CS at a dose of 50,000 IU/kg is effective in reducing fecal excretion of E. coli. However, this regimen was associated with a selection pressure on E. coli CS resistance, and did not improve growth performance in challenged pigs. Thus, the use of this antibiotic in pig should be revised

    A Sec14p-nodulin domain phosphatidylinositol transfer protein polarizes membrane growth of Arabidopsis thaliana root hairs

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    Phosphatidylinositol (PtdIns) transfer proteins (PITPs) regulate signaling interfaces between lipid metabolism and membrane trafficking. Herein, we demonstrate that AtSfh1p, a member of a large and uncharacterized Arabidopsis thaliana Sec14p-nodulin domain family, is a PITP that regulates a specific stage in root hair development. AtSfh1p localizes along the root hair plasma membrane and is enriched in discrete plasma membrane domains and in the root hair tip cytoplasm. This localization pattern recapitulates that visualized for PtdIns(4,5)P2 in developing root hairs. Gene ablation experiments show AtSfh1p nullizygosity compromises polarized root hair expansion in a manner that coincides with loss of tip-directed PtdIns(4,5)P2, dispersal of secretory vesicles from the tip cytoplasm, loss of the tip f-actin network, and manifest disorganization of the root hair microtubule cytoskeleton. Derangement of tip-directed Ca2+ gradients is also apparent and results from isotropic influx of Ca2+ from the extracellular milieu. We propose AtSfh1p regulates intracellular and plasma membrane phosphoinositide polarity landmarks that focus membrane trafficking, Ca2+ signaling, and cytoskeleton functions to the growing root hair apex. We further suggest that Sec14p-nodulin domain proteins represent a family of regulators of polarized membrane growth in plants

    Exploring young people's perspectives on mental health support: a qualitative study across three geographical areas in England, UK

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    Improving young people's (YP) mental health and well-being is a global public health priority. Despite continued commitment within the UK policy agenda to improve the mental health and well-being of YP, the incidence of mental health issues continues to rise. This has been further compounded by the outbreak of COVID-19 which has disproportionately affected YP in the most socioeconomically disadvantaged areas. Understanding YP's perspectives on what supports their mental health is important to develop policies that meet their needs. We conducted focus groups (n = 18 with 42 YP aged 13–21) in three geographical areas with high levels of deprivation in England, UK. Recruited through six local youth organisations, each group of YP took part in three interlinked focus groups designed to explore their perceptions of what impacts their health in their local area, and their understandings of health inequalities through participatory methods. Throughout their discussions, YP foregrounded the significance of mental health and mental health support structures. YP perceived challenges to accessing mental health provision and an unmet need for support within their local communities. Alongside this, YP consistently highlighted the importance of youth groups for promoting good mental health and mitigating challenges to poor mental health. However, ongoing cuts to the voluntary sector and universal services continue to impact areas and individuals in the greatest need. In the face of deficits in formal mental health support, our findings highlight the pressing need for increased investment in services focused on prevention (such as youth groups) in areas of high deprivation
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