Most SCADA devices have few built-in self-defence mechanisms, and tend to implicitly trust communications received over the network. Therefore, monitoring and forensic analysis of network traffic is a critical prerequisite for building an effective defense around SCADA units. In this work, we provide a comprehensive forensic analysis of network traffic generated by the PCCC(Programmable Control...

As a result of the production powder processing causes lot dust around machine and factory. This course can cause pollution. Dust needs to be collected using Collector (DC) machine. The controller on DC at PT. xxx is often damaged in control unit requires repairs cost Rp. 5,000,000 per unit. In facts there are about 10 units machines PT.xxx that must work all. Because their controllers, mainten...

One of the main themes in the area of Terminological Reasoning has been to identify description logics (DLs) that are both very expressive and decidable. A recent paper by Schild showed that this issue can be profitably addressed by relying on a correspondence between DLs and propositional dynamic logics (PDL). However Schild left open three important problems, related to the translation into P...

We will report on new dc-free runlength-limited codes (DCRLL) intended for the next generation of DVD. The efficiency of the newly developed DCRLL schemes is extremely close to the theoretical maximum, and as a result, significant density gains can be obtained with respect to prior art coding schemes. With a newly developed DCRLL ( = 2) code we can achieve a 9% higher overall rate than that of ...

This project studied whether a digital interlocking which had been programmed with ladder logic (Boolean program) would obey generic safety properties. This was carried out by translating the ladder logic into an alternate representation and applying various techniques to allow specification of safety properties. Finally, a proof engine was used to formally verify if these properties were fulfi...

in this article, a speed control of dc motor is designed and illustrated using fuzzy logic-based programmable logic controller (plc). the dc motor is an attractive part of electrical equipment in many industrial applications requiring variable speed and load specifications due to its ease of controllability. the designed system is consisted of three main parts including programmable logic contr...