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Wireless body area networks (WBANs) are receiving a significant interest as an emerging technology in next generation wireless networks. Security challenges as well as this interest are also beginning to rise to the surface. We derived specific security requirements from WBANs, and proposed a new hybrid security protocol for WBANs which satisfies these requirements. This proposed protocol dealt with the overall security including up to the in-, on-, and out-body, and utilized two heterogeneous cryptosystems (the symmetric and asymmetric) for diverse environments of WBANs. Our protocol shows that it satisfies more security requirements than existing security protocols including the overall coverage of WBANs.

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Kyungsuk Hyun KMACThis study presents a multi-stage synthetic model designed to aid hotel room pricing. The complicated factors used in this model include fixed and variable costs, profit goal, identification of market competition, factors needed to measure a differentiation price premium, price standard limits, and factors needed to develop discriminatory pricing for different segments of customers. The model framework can provide realistic perspectives of hotel room rates. A five-star international hotel was used to illustrate the application of this model by deriving actual price data. A critical step in this model was to develop the hotel's market premium price (MPP) based on consumer surveys. Factor analysis, ANOVA, and the Scheffé post-hoc tests were utilized in the analysis. The model provides new insights into hotel room pricing by offering a step-by-step process leading to room-pricing decisions for hotel revenue managers and marketers.

As energy consumption in residential areas is rising, residential homes have deployed a photovoltaic (PV) system to save energy cost. The PV system needs to be continuously monitored to maintain its appropriate performance. In addition, it is desirable to monitor each PV module because one abnormal PV module affects the whole PV system. In this paper, the power line communication (PLC) compliant with HomePlug is adopted to monitor each PV module. The system architecture is composed of three components: PLC modem, renewable energy gateway (REG), and smart device application. The PLC modems are deployed on each PV module and monitor it. The REG aggregates and stores the monitored data from the PLC modems and the inverter. The smart device application retrieves the stored data from the REG to inform users of the status of the PV system. Users can browse and figure out the PV system performance in detail. The proposed system is installed in the field that is composed of sixteen 210W PV modules and a 3kW inverter. This scheme will maintain the performance of a PV system and contribute to enhancing home energy management system 1 .