In this paper, we propose a centralized cluster head selection approach using analytical hierarchy process (AHP). Three factors contributing to the network lifetime are considered and they are energy, ...

Choosing the best spotting scope tripod can be tricky. It can be tempting to go for something ultra-cheap, but this can be a false economy. Spend too little and you can end up with a flimsy thing that ...

The 3,000-foot tunnel — which reached depths of around 50 feet underground at its deepest point — was equipped with lighting, electrical wiring, ventilation systems and a track system. The ...