the main design criteria of ballasted railway tracks include rail deflections, rail bending stresses, rail wheel contact stresses, sleeper bending moments and ballast sleeper contact pressures. numerous criteria have been defined for the design of ballasted railway tracks owing to the various mechanical properties of track components and their complex interaction. therefore, railway track desig...

INTRODUCTION Since adoption of the measles case-based surveillance system in Zimbabwe in 1998, data has been routinely collected at all levels of the health delivery system and sent to national level with little or no documented evidence of use to identify risky populations, monitor impact of interventions and measure progress towards achieving measles elimination. We analysed this data to dete...

This paper considers the technical efficiency gains that have been achieved since privatisation of the British passenger railway. This is done through estimation of a stochastic efficiency frontier, with efficiency gains split between those arising through technical change and those arising out of management technical performance i.e. total factor productivity. The results suggest that most of ...

Shigeto HIRAGURI ȁSince the IEC published RAMS Standard in 2002 objective to railways, its importance and an impact of the standard to Japan have been conspicuous. On the contrary, new various train control systems based on information technology are under active development. Considering such situations, we assume that it is essential to establish a method to design railway-signalling systems, ...

Evaluation of quality and quantity of publications can be done using a set of statistical and mathematical indices called bibliometric indicators. Two major categories of indicators are (1) quantitative indicators that measure the research productivity of a researcher and (2) performance indicators that evaluate the quality of publications. Bibliometric indicators are important for both the ind...