the design and application of a fuzzy logic based controller to a leakage current relay waspresented in this paper. a novel approach based on fuzzy logic to form the tripping action of leakagecurrent relay was investigated. in addition to the theoretical aspect of fuzzy logic, detection of a leakagecurrent, measurement of the leakage current, determination of its duration, trip opening of fault...

One of an operating system's duties is to provide a trustful security architecture to protect user information from threats coming from all aspects the information world. Trojan horses, viruses, and other threats are all aimed at users' personal information. Therefore, the concept of access control has been introduced to system security area years ago. Typically, it guaranties that only process...

A Machine Protection System implemented on the SLC automatically controls the beam repetition rates in the accelerator so that radiation or temperature faults slowthe repetition rate to bring the fault within tolerance without shutting down the machine. This process allows the accelerator to aid in the fault diagnostic process, and the protection system automatically restores the beams back to ...

This paper describes an efficient and elegant architecture for unifying the meta-data protection of journaling file systems with the data integrity protection of collision-resistant cryptographic hashes. Traditional file system journaling protects the ordering of meta-data operations to maintain consistency in the presence of crashes. However, journaling does not protect important system meta-d...

Background: For several centuries, there has been a debate about the dimensions of intellectual property to support the thinkers of society and prevent their exploitation. Unfortunately, this invisible and powerful asset is increasingly vulnerable. Therefore, establishing favorable regulations, guaranteeing proper criminal enforcement and effective enforcement of laws in order to protect these ...

In recent years, most of the loads and distributed generations are connected to the AC grid through the power electronic converters. Using the DC grid beside the AC grid can reduce the conversion stages and power losses. Protection of the DC grids is a challenging issue because of the new structures of DC grids and fast transients of the DC faults. This paper studies the protection of the low v...

précis this debate article highlights the challenges of health situation in iran and some influencing or relevant factors such as health sector, welfare system and social protection, social exclusion and civil society from the viewpoint of an international partner. some advanced experiences in iranian health system and the manner of system for international cooperation have also been discussed.

In recent years several catastrophic power systems blackouts have occurred worldwide. Various reasons have been declared for these failures. Economical limitations due to power system restructuring restrictions, inadvertent operation of protective relays and inefficient design of conventional load shedding schemes are of the most important reasons causing these blackouts. In fact, due to both e...