the vibrations produced by trains include two parts which are deterministic and random vibrations. due to variation of dynamic loads and patterns of load-time, the random vibration of moving train is one of the most important issues in the field of railway engineering. one of the important sources in producing the train vibrations is rail roughness and irregularities. in this paper, responses o...

The regulation of quantal size through pre- rather than postsynaptic mechanisms has recently received considerable attention as a potential mechanism for plasticity. Vesicular transporters catalyze the filling of synaptic vesicles with transmitter and are thus potential substrates for such presynaptic regulation. In this issue of Neuron, Prado et al. pursue this line of investigation and show t...

Cardiothoracic Surgeons of Great Britain and Ireland. Tom Treasure is responsible to the society for the collection and collation of these data and has a mandate from the society’s annual general meeting of its members to disseminate information based on the data. Contributors: AS, TT, and JvdM were responsible for study concept and design. TT and AS were responsible for acquisition of the data...

In reading through the various preprints, I was struck by the fact that many were concerned with specific computer implementations of one kind or another. Unfortunately, there seems to be little discussion of the program-ing from the programmer's viewpoint. This is under standable in a congress of computational linguistics but, I feel, somewhat regrettable. Especially nce the reports of what ha...