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41.
Tony Burns 《The Sociological review》1996,44(3):474-494
This paper looks at the work of the Chicago School in the 1920s and 1930s from the standpoint of the debate between positivism and its critics within the discipline of sociology. It is argued that, despite appearances to the contrary, Chicago sociology at this time is based on a rejection of the principles of positivism. It is an attempt to apply the principles of interpretative understanding to the practical problems of empirical research. 相似文献
42.
The authors explore a number of issues surrounding multicultural education in “societies in transition”, emerging from their experiences during a TEMPUS project that took place in the Slovak Republic. The TEMPUS project entailed the development of a multicultural education curriculum for teacher trainers, as a response to the conditions for entry into the European Union. The paper provides background information on the position of ethnic minorities in Slovakia, in particular the Hungarian and Roma population and the development of policies, especially in education, for combating racism. In examining the challenges to educators in developing a more open system than the command education of the recent past, issues such as the predominance of traditional pedagogies, multiculturalism and antiracism, the problems of “other isms” and of giving voice to minorities are considered. 相似文献
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Tony Lindeberg 《Journal of applied statistics》1994,21(1-2):225-270
An inherent property of objects in the world is that they only exist as meaningful entities over certain ranges of scale. If one aims to describe the structure of unknown real-world signals, then a multi-scale representation of data is of crucial importance. This paper gives a tutorial review of a special type of multi-scale representation—linear scale-space representation—which has been developed by the computer vision community to handle image structures at different scales in a consistent manner. The basic idea is to embed the original signal into a one-parameter family of gradually smoothed signals in which the fine-scale details are successively suppressed. Under rather general conditions on the type of computations that are to be performed at the first stages of visual processing, in what can be termed ‘the visual front-end’, it can be shown that the Gaussian kernel and its derivatives are singled out as the only possible smoothing kernels. The conditions that specify the Gaussian kernel are, basically, linearity and shift invariance, combined with different ways of formalizing the notion that structures at coarse scales should correspond to simplifications of corresponding structures at fine scales-they should not be accidental phenomena created by the smoothing method. Notably, several different ways of choosing scale-space axioms give rise to the same conclusion. The output from the scale-space representation can be used for a variety of early visual tasks; operations such as feature detection, feature classification and shape computation can be expressed directly in terms of (possibly non-linear) combinations of Gaussian derivatives at multiple scales. In this sense the scale-space representation canserve as a basis for early vision. During the last few decades, a number of other approaches to multiscale representations have been developed, which are more or less related to scale-space theory, notably the theories of pyramids, wavelets and multi grid methods.Despite their qualitative differences, the increasing propularity of each of these approaches indicates that the crucial notion of scale is increasingly appreciated by the computer.vision community and by researchers in other related fields. An interesting similarity to biological vision is that the scale-space operators closely resemble receptive field profiles registered in neurophysiological studies of the mam- malian retina and visual cortex. 相似文献
48.
Tony Coxon 《The Sociological review》1988,36(2):353-367
Reliable information about the detail and context of sexual behaviour is crucial for describing high-risk behaviours for the transmission of Aids/HIV, and for estimating parameters of epidemiological models. It is possible to adapt the method of systematic diary-keeping to this end and develop a tool which is also close to the subject's conceptions of the ‘chunks’ of sexual behaviour. The structure of reports of sexual behaviour is viewed as akin to linguistic structure, with a basic unit of the sexual act built into a ‘session’. Such structure leads naturally to a coding system which allows natural language accounts to be represented symbolically, and parsed and analysed formally. The coded version is easily learnt and used, and is incomprehensible to outsiders. Examples are given of its use to collect systematic data on homosexual and bisexual behaviour. 相似文献
49.
Lipsky's Street-level Bureaucracy (Russell Sage Foundation, New York, 1980) has exerted a strong influence on the study of public service organisations. There has been a growing interest in using this perspective to understand the organisational context of social work and Musil et al.'s article in the EJSW (2004, ‘Do social workers avoid the dilemmas of work with clients?’, European Journal of Social Work, vol. 7, no. 3, pp. 305–319) reflects this interest. Musil et al. argue that it is possible to identify two forms of practitioner response to the constraints of street-level bureaucracies: adapting working practices in ways that disadvantage service users or challenging working conditions in order to achieve more professionally acceptable practice. Their contribution to the debate is helpful, particularly with regard to their identification of responses by practitioners that seek to advance the interests of service users. However, we view their approach as constrained by lack of consideration of the construction of social work roles within particular street-level bureaucracies. We suggest that Lipsky's work should be approached as a tentative analytic framework, rather than as a fixed model and we argue that a productive approach to research on social workers as street-level bureaucrats is conjunctural analysis. Such analysis examines the contexts, circumstances and statuses of practitioners and how these factors shape the specific forms of street-level practice that operate in particular organisational settings. We illustrate this in our discussion of the factors that are likely to have had a bearing on the two practice settings used as case studies by Musil et al. 相似文献