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Cuba's medical internationalism is extraordinary, and in many ways the extent of its outreach programme puts the developed world to shame. It is impossible to fit Cuba's actions into any neat theoretical box—quite simply the revolutionary process follows no established paradigm. This exceptionalism is seen both in its approach to foreign relations and in its medical internationalism policy. Indeed, even during the days when it was economically dependent upon the Soviet Union, Cuban actions showed an exceptional degree of political independence. But because Cuba is so different, it is also difficult for developed nations to understand. This is a tremendous pity, for there is much to learn from Cuba's approach to developing sustainable public health systems in poor, Third World countries. There is also a great deal that, on a moral basis, wealthy nations can also learn about Cuba's policy of internationalist solidarity.  相似文献   
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This paper summarizes the results of previous work on the microscopic observation of linear dichroism found in dyed fibres (polyesters, polyamides, wool, silk, cotton, viscose, acrylics and acetates) and in pigmented fibres as well as the measurements on these fibre classes using microspectrophotometry with plane polarized light (MSP-PPL). The validation of this method is discussed and a practical tool is proposed for comparing fibre traces with control fibres. The limitations and strengths of this method are also revised.  相似文献   
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Abstract

We argue that progressive activists and scholars should take seriously the question of a progressive third party. Since the mid‐1970s political and economic conditions in the U.S. have shifted in ways favorable to such activism. Using the reality of the grassroots upsurge which supported Jesse Jackson's 1988 campaign as a reference point, we sketch out three major aspects of the emerging potential: the expansion of the left's constituency, the convergence of activist agendas, and the increasing consideration of electoral options within the activist community. For each of these three dimensions we show both how the conditions of the early post‐war years worked against an independent left political movement and how the changes of the past two decades have created new opportunities. We do not argue for the ultimate determinacy of political‐economic variables. Rather by showing several major ways in which the social terrain has changed, we seek to demonstrate why the issue of a viable progressive political movement merits serious discussion among scholars and activists.  相似文献   
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