Current scanning detection algorithms are based on an underlying assumption that scanning activity can be attributed to a meaningful specific source (i.e. the root cause or scan controller). Sophisticated scanning activity including the use of botnets, idle scanning, and throwaway systems violates this assumption. We propose a class of scanning detection algorithms that focus on what is being s...

We study the problem of optimally controlling the use of sleep states in an energy-aware M/G/1 queue. In our model, we consider a family of policies where the server upon becoming idle can wait for a random period before entering, potentially randomly, any of a finite number of possible sleep states to save energy. The server becomes busy again after a possibly random number of jobs have arrive...

Energy efficient design for disk devices has become a very important issue, because ever increasing need for data storage systems significantly increases the power budget in the disk array. Most research on power management in disk devices focuses on the traditional way of stopping disk rotation. In this paper, we suggest a new approach in which the energy consumption can be reduced without sto...

Cellular digital packet data (CDPD) networks borrow idle radio channels from advanced mobile phone standard (AMPS) cellular networks to send packet data traffic. We explore the amount of unused AMPS capacity available to parasitic data networks such as CDPD. Due to trunking inefficiencies, a relatively large amount of spare AMPS airlink capacity can be found. In addition, the periods of time AM...

The intake air control system of a gasoline engine is a typical nonlinear system, and included among the adverse factors that always induce poor idle-speed control stability are dead time and disturbances in the intake air control process. In this paper, to improve the responsiveness when idling with regard to disturbances, a mean-value engine model (MVEM) with dead time was constructed as the ...

With the continuous increase of processing power, the graphic hardware – also called Graphic Processor Unit (GPU) – is naturally assuming most part of the rendering pipeline, leaving the Central Processor Unit (CPU) with more idle time. In order to take advantage of this when rendering relief textures, the present work proposes two approaches for the mapping of relief textures. Both methods are...