The continued growth of the cities is causing an increase of the amount of surface to illuminate. However, this rise into lighting brings some unintended consequences such as increased of energy consumption or the light pollution. To make these effects less intrusive as possible some councils have chosen to perform a part-night lighting in some areas. Nonetheless, this kind of shutdown may caus...

The main causes of destructive steam and gas explosions with catastrophic environmental consequences during the accidents at Fukushima-Daiichi NPP were loss tightness passive safety systems reactor residual fuel removal system critical heat function in spent nuclear holding tank . lesson Fukushima accident for Ukraine's power industry is need to anticipate possibility unlikely emergency events ...

For several decades the traditional mindset for controlling large-scale power systems has been limited to local output feedback control, which means that controllers installed within the operating region of any utility company typically use measurements available only from inside that region for feedback, and, in fact, more commonly only from the vicinity of the controller location. Examples of...

WAMPA (for Wide Area MicroProbe Analyser) represents a new scientific instrument concept for planetary exploration. WAMPA builds on recently published research such as sensor webs and distributed microsensors [1][2] but adds new sensor and localisation concepts. WAMPA is driven by the recurrent theme in spacecraft and sensor design to achieve smaller, lighter and lower cost systems. The essenti...

Distributed search of state spaces containing cycles is a challenging task and has been studied for years. Traditional parallel search algorithms either ignore the cyclic nature of the state space and waste much time in duplicated search effort, or rely on heavy communication to reduce duplicate work, resulting in a large communication overhead. Both methods perform poorly, even when using a fa...

As power system loading increases, larger blackouts due to cascading outages become more likely. We investigate a critical loading at which the average size of blackouts increases sharply to examine whether the probability distribution of blackout sizes shows the power tails observed in real blackout data. Three different models are used, including two simulations of cascading outages in electr...