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In this paper, we describe recent trends in attitudes toward immigration in North America, and we suggest how these attitudes are likely to be affected by the September 11, 2001 "Attack on America." We begin by explaining why public attitudes toward immigration are important, and describe recent trends in these attitudes in the United States and Canada. Then, we apply psychological perspectives to predicting how these attitudes are likely to change in response to the events of September 11th. In particular, we describe expected short-term changes in immigration attitudes and expected long-term trends. We conclude by suggesting that an understanding of the psychological processes underlying unfavorable attitudes may assist in counteracting these effects; we also suggest that policy makers will be faced with the difficult task of balancing the need for a sense of security for members of the national group, and maintenance of the positive features of current immigration policies.  相似文献   
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Social scientific work on argumentation is yet to address the perennial tension between social cognition and social constructionism. Moreover, argumentation-based qualitative analysis protocols are needed for interview and textual data. Nonetheless, argumentation models remain too complex to reflect everyday argumentation and are not necessarily reflective of underlying cognitive processes. This presents the need for further theorising social behaviour, with a view to formulating a model of argumentation that (a) is parsimonious, and (b) aligns with the literature on joint projects, due to the fact that in social cognition terms, argumentation is for doing. In this paper, we draw upon interdisciplinary literature on argumentation, noting convergences among different approaches. We then proceed to consider the socio-cognitive bedding provided by Lay Epistemic Theory, to present our Minimal Model of Argumentation (MMA). In MMA, interlocutors are held to make claims concerning an issue of concern, and defend them using warrants, evidence and qualifiers. We end by providing empirical examples supporting the utility of our model in qualitative research.  相似文献   
566.
The management of inventories and determination of transportation policy are normally carried out by different groups of people in an organization. These activities interact, however, when the transportation is used to replace inventory and when the transportation alternatives have different speed, reliability, and cost characteristics. This paper presents exact and heuristic procedures for jointly determining the inventory reorder points, order quantities, and transportation alternatives that provide minimum total transportation and inventory costs. The effectiveness of each procedure is demonstrated for a broad range of problems. The heuristic procedure was also applied to actual company data to determine the potential for cost savings. The results showed that savings were possible both from improving the current procedures and from applying the procedure developed in this study.  相似文献   
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