STEEL SLEEPERS IN QUEENSLAND. (ABRIDGED). (INCLUDES APPENDIX).

Drugs for poor sleepers?

Embedding Wireless Sensors in Railway Sleepers

In recent years there has been intensive research and development in the application of wireless sensor network (WSN) technologies to various sectors such as healthcare, home automation, environmental monitoring and the monitoring of large structures, eg, buildings and bridges. The monitoring of railway infrastructure such as the tracks, bearers and sleepers is another area that could potential...

Sentries and Sleepers in Sensor Networks

A sensor is a battery-operated small computer with an antenna and a sensing board that can sense magnetism, sound, heat, etc. Sensors in a network can use their antennas to communicate in a wireless fashion by broadcasting messages over radio frequency to neighboring sensors in the same network. In order to lengthen the relatively short lifetime of sensor batteries, each sensor in a network can...

Arithmetic without Fear *Abridged.

Now why should such things be ? How can we make the rough places plain and the crooked straight, so that all children may enter into their rightful heritage, that fairyland which the realm of number was to Lewis Carroll or A. A. Milne ? The extent of the Arithmetic phobia is not so widespread as it is usually supposed to be. I have repeatedly found that the majority of small children really do ...

Abridged Petri Nets

A new graphical framework, Abridged Petri Nets (APNs) is introduced for bottom-up modeling of complex stochastic systems. APNs are similar to Stochastic Petri Nets (SPNs) in as much as they both rely on component-based representation of system state space, in contrast to Markov chains that explicitly model the states of an entire system. In both frameworks, so-called tokens (denoted as small ci...