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Top of rail Friction Modifiers are designed to control frictional characteristics at the wheel-rail interface that influence noise, corrugations, and lateral forces. Key characteristics of the resulting thin film are 1) controlled intermediate coefficient of friction and 2) positive friction, to reduce rollslip oscillations related to both curve squeal noise and short pitch corrugation development. Practical results are presented on the effect of friction modifiers on curve squeal and flanging noise generation at a range of European mass transit sites. Noise reductions ranging from 6.3 to 22.8 dBA were recorded, with an average reduction across the different test sites of 12.0 dBA. Both top of rail squeal and flanging components of noise were reduced.The effect of friction modifier on short pitch corrugation development was evaluated over several years at two curves at Metro Bilbao. Under conditions where corrugations grew from 0.01 mm to 0.05 mm in eighteen months under baseline conditions, with application of friction modifier essentially no corrugation growth occurred in an equivalent time period.

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Wayside gauge face lubrication is widely used to minimize rail wear. Scientific understanding of this process is limited; however, there have been significant recent improvements in application equipment. In this paper the process is analyzed in terms of a number of interacting sub-processes, and the factors thought to be important for lubricant and application equipment are reviewed. Wheel/rail contact conditions (pressure and temperature) are also identified as significant variables. Grease stability and retentivity are significant factors that affect lubricant performance; however, significant knowledge gaps exist about the factors that influence grease pick up and carry down especially at the extremes of operating temperatures. Laboratory (two-roller rig measurement of retentivity) and field evaluation (rail friction measurements of carry down) gave the same relative ranking for the tested grease samples. Areas for future research in the area are identified.

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This paper offers an account of Bourdieu’s rise to sociological ‘stardom’ in the last 30 years, giving special attention to the transnational dimensions of this process. It discusses the scope and relevance of his work to the field (in the making) of cultural sociology, showing how he contributed to its current form. It also presents the articles which constitute the contents of the journal special issue. The paper insists on the importance of assessing both the virtues and limits of Bourdieu’s intellectual legacy through the means of historicization and sociological self-understanding, these being preconditions that allow the furthering of the ‘progress of reason’ which Bourdieu himself located as at the core of scientific endeavours.