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In four studies, with rats as Ss. acquisition and. where appropriate, extinction trials were presented against a baseline of ongoing licking. At shock intensities of 0.1. 0.5. 1.0, or 2.0 mA, acquisition performance was a function of number of CS-US pairings: spacing of trials (one or two per day) did not affect acquisition performance. Resistance to extinction could be predicted from terminal acquisition performance and reached a maximum after three CS-US pairings.  相似文献   
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ABSTRACT

Testimony from colleagues in the cultural sector suggests that there is a common perception of leaders as authoritarian, infallible and invulnerable. However, developing leaders soon come to understand that good leaders often have an authenticity of their own. Being able to embrace authentic leadership in this way requires confidence. It involves accepting vulnerabilities, learning to be comfortable making decisions without all the information, and daring to risk potential failure as the best way to encourage creativity, innovation and learning. Given this dichotomy, is there a potential for the development of leadership in conservation? This paper explores the unique challenges we face as conservators in a changing sector. In it, I reconnect with professional experiences of my own and those I gained as the first conservation fellow on the Clore Leadership Programme as well as examining testimony from others in the profession and the wider cultural sector. The ideas generated are supported by literature from a variety of sources inside and outside the conservation field. Starting from what draws people to conservation in the very beginning and working through to the leadership of the profession, the paper identifies four main areas of challenge for conservation in a twenty-first-century creative economy. These are around a lack of diversity, a lack of confidence, the strength of voice and perception and issues around support, for our decision-making and for the profession as a whole. The paper concludes that a new vision for the future of conservation could not only help rebalance the diverging preventive and remedial specialisms but also be instrumental in the perception, interpretation and preservation of cultural heritage. If we expand our horizons, the bigger picture of heritage and what it can achieve for the society could be crucial to us not only changing but thriving in the modern world.  相似文献   
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Science and the diffusion of knowledge   总被引:2,自引:0,他引:2  
Olav Sorenson  Lee Fleming   《Research Policy》2004,33(10):1615-1634
Scientists, social scientists and politicians frequently credit basic science with stimulating technological innovation, and with it economic growth. Despite a substantial body of research investigating this general relationship, relatively little empirical attention has been given to understanding the mechanisms that might generate this linkage. This paper considers whether more rapid diffusion of knowledge, brought about by the norm of publication, might account for part of this effect. We identify the importance of publication by comparing the patterns of citations from future patents to three groups of focal patents: (i) those that reference scientific (peer-reviewed) publications, (ii) those that reference commercial (non-scientific) publications; and (iii) those that reference neither. Our analyses strongly implicate publication as an important mechanism for accelerating the rate of technological innovation: Patents that reference published material, whether peer-reviewed or not, receive more citations, primarily because their influence diffuses faster in time and space.  相似文献   
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Previous studies have demonstrated the positive impact of shared reading (SR) and dialogic reading (DR) on young children's language and literacy development. This exploratory study compared the relative impact of parental DR and shared reading interventions on 4‐year‐old children's early literacy skills and parental attitudes to reading prior to and following school entry. Parents were trained using a self‐instruction training DVD. The children's rhyme awareness, word reading, concepts about print and writing vocabulary were assessed before and after 6 weeks over the summer period and again after one term in school. Four illustrative case studies are presented, which reveal the differential impact of the interventions on the families who participated. Findings indicated that DR had a positive impact on children's enjoyment of reading, concepts about print, parent–child reading behaviours and parental attitudes to joint storybook reading. The children who experienced shared‐book reading during the intervention also demonstrated improvements in word reading. There were no changes in rhyme awareness or writing vocabulary for either group. Changes in print concept awareness were not maintained at follow‐up, but improvements in writing vocabulary and word reading scores were noted. The reasons for this are discussed with reference to the formal literacy instruction the children received during their first academic term.  相似文献   
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The purpose of this study was to explore the experiences of female (association) football officials who officiate in amateur men’s and boys’ football matches in two UK counties (Warwickshire and Somerset). The research presents a view of men’s football from a position that has hitherto been overlooked in the social exploration of football culture. Drawing upon ethnographic fieldwork collected between September and December 2012, the findings provide insight into some women’s experiences of sexism and marginalization in predominantly male football contexts. Participant observations, formal semi-structured interviews and a range of informal conversations with four female match officials demonstrated a wide range of abuse that could generally be construed as sexist. The women used various strategies to overcome the hostile attitudes that often greeted their presence on the football pitch. Moreover, they continuously negotiated their identities as females and football officials in a space where men and masculinity are prevalent.  相似文献   
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This paper investigates how the narratives Special Educational Needs Co-ordinators (SENCOs) tell can be framed as social, discursive practices and performances of identity by analysing accounts offered in focus groups and life history interviews. I explore how the narratives deployed demonstrate an engagement with a rhetoric about who works in inclusive education. I argue that this rhetoric informs the materialisation of what Butler terms an ‘intelligible identity’ (1993, 2004), one which might be identified as a SENCO identity because it is gendered as feminine and caring. However, I explore how some of these narratives simultaneously negotiate and refigure rhetorical constructions of intelligible identities by invoking a child-centred warrior persona to alternatively iterate belonging to the special educational needs community. Thus my analysis considers the potential for personal narratives to decouple gender from a rhetoric of caring and identifies potential alternatives for claiming a SENCO identity.  相似文献   
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