• Journal of Digital Convergence
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• v.12 no.2
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• pp.301-306
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• 2014

An app is designed for the socially disadvantaged related to the Sex Offense. In 2013, The Republic of Korea claimed to exterminate four social evils. The first one of social evils is sexual assault. The app proposed in this paper will be used to prevent sex offenses. People may check the news related to the sex offense and search the sex offender. People may learn simple self-defense martial arts and use guidance service to go home safely. People may use this app trying to keep safety from the potential criminals by themselves.

• Journal of Institute of Control, Robotics and Systems
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• v.14 no.4
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• pp.399-405
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• 2008

Recently, robot technology is actively going on progress to the field of various services such as home care, medical care, entertainment, and etc. Because these service robots are in use nearby person, they need to be operated safely even though hardware and software faults occur. This paper proposes a Fault-Tolerant middleware for a robot system, which has following two characteristics: supporting of heterogeneous network interface and processing of software components and network faults. The Fault-Tolerant middleware consists of a Service Layer(SL), a Network Adaptation Layer(NAL), a Network Interface Layer(NIL), a Operating System ion Layer(OSAL), and a Fault-Tolerant Manager(FTM). Especially, the Fault-Tolerant Manager consists of 4 components: Monitor, Fault Detector, Fault Notifier, and Fault Recover to detect and recover the faults effectively. This paper implements and tests the proposed middleware. Some experiment results show that the proposed Fault-Tolerant middleware is working well.