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61.
It is argued that the concept of discursive formation presented by Foucault provides the means whereby conventional treatments of ‘discourse’ can be criticized. These would include historical, linguistic and epistemological forms of investigation. But it is also argued that Foucault does not sufficiently displace linguistic categories. As a result his account of the theoretical problems of ‘conditions of existence’ of discourses cannot be sustained.  相似文献   
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Inspired by and responding to Avtar Brah's ‘The Scent of Memory’, this piece attempts to reinscribe race into an auto-ethnographic narrative where previously whiteness was unmarked. It explores the dynamics of gender, race and class through the author's personal history as a white English woman and class migrant, and through discussion of the broader political and historical context of that trajectory. The discussion includes analysis of the impact of British Conservative politician Enoch Powell's infamous ‘rivers of blood’ speech in 1968 on the author's white English working-class culture of origin in Wolverhampton, where Powell was a Member of Parliament. The article considers the speech's continuing ramifications in the twenty-first century and in more middle-class contexts, as evidenced by the recent evocation of the speech by historian David Starkey in discussion of the ‘riots’ of August 2011 in British cities. The personal history is reconstructed through a series of memory scenes that trace and retrace the author's experience and understanding of race and its intersections with class and gender; this is attempted in full cognisance of the constructed nature of memory, and of the performance of identity that autobiography entails. The piece draws on the work of the class migrant white French writer Annie Ernaux, with whom the author has been in dialogue since 1997.  相似文献   
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Current forensic DNA profiling methods rely on the analysis of samples at specialised laboratories with an average turnaround time of several days. The ability to rapidly determine a partial profile of short tandem repeats at the point-of-arrest would be of great benefit to police forces around the world, for example enabling a suspect to be rapidly included or excluded from an investigation. We have developed a homogeneous PCR method for the interrogation of STR loci utilising fluorescent oligonucleotide probes and melting curve analysis. Alleles of the D18S51, TH01 and D8S1179 loci were differentiated and identified on the basis of target length and probe melting temperature. Assay performance was evaluated by comparing melting peak data with the AmpFlSTR® SGM Plus® system. The method is compatible with direct analysis of unpurified buccal swab samples, enabling a partial STR profile to be generated within 1 h.  相似文献   
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Extracurricular activities provide a key context for youth development, and participation has been linked with positive developmental outcomes. Using data from the 4-H Study of Positive Youth Development (PYD), this study explored how the intentional self regulation ability of youth interacted with participation in extracurricular activities to affect PYD among adolescents living in neighborhoods with relatively low ecological assets. In total, 545 youth were included in the study (50.3% female). Most of the youth were European American (41%) or Latino (37%; African American, 10%; Asian American, 7%; Native American, 4%; and other, 1%). In general, youth with the greatest capacity to self regulate benefitted the most, as compared to their peers with less capacity to self regulate, from involvement in extracurricular activities. Consistent with a developmental systems perspective, and specifically with bioecological theory, the findings from this study confirmed that, within lower asset settings, children with the most positive person-level factors (intentional self regulation) benefit the most from proximal processes such as extracurricular activity involvement.  相似文献   
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