52 resultados para Operant Discrimination

em BORIS: Bern Open Repository and Information System - Berna - Suiça


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Using findings from a qualitative investigation based on in-depth email interviews with 47 Black and South Asian gay men in Britain, this paper explores the cross-cutting identities and discourses in relation to being both gay and from an ethnic minority background. Taking an intersectional approach, detailed accounts of identity negotiation, cultural pressures, experiences of discrimination and exclusion and the relationship between minority ethnic gay men and mainstream White gay culture are presented and explored. The major findings common to both groups were: cultural barriers limiting disclosure of sexuality to family and wider social networks; experiences of discrimination by White gay men that included exclusion as well as objectification; a lack of positive gay role models and imagery relating to men from minority ethnic backgrounds. Among South Asian gay men, a major theme was regret at being unable to fulfil family expectations regarding marriage and children, while among Black gay men, there was a strong belief that same-sex behaviour subverted cultural notions related to how masculinity is configured. The paper concludes by highlighting the importance of social location, particularly education and income, when examining the intersection of ethnicity and sexuality in future research.

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To test whether in-the-canal (ITC) microphones have an impact on spatial discrimination and speech perception by taking advantage of auricular cues.

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The European trout (Salmo trutta species complex) is genetically very diverse consisting of five distinct mitochondrial lineages that probably originated in the Pleistocene. Here, we describe a novel pyrosequencing protocol to generate two short sequence reads from the mitochondrial control region, which allow the unambiguous identification of all five lineages. The approach was found to be easily transferable between laboratories and should be a valuable tool for the assessment of genetic diversity in trout. Pyrosequencing-based assays for molecular species identification are expected to be generally useful whenever multiple positions in a short DNA sequence need to be assessed.

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The surgical approach to parotid tumors is different for benign and malignant neoplasms, but the clinical symptoms do not correlate well with histology. Difficulties in tumor classification also arise in imaging modalities, in which sonography has the lowest and MR imaging, the highest accuracy. The purpose of this study was to review our experience using conventional MR imaging of the neck in the evaluation of parotid tumors and to evaluate which MR imaging findings are best able to predict malignant histology.