Accepted Papers

  • Characteristics Analysis and Security Authentication of Dual Chaotic Watermarking in Spatial Domain
    1Zhengmao Ye, 2Hang Yin, 3Yongmao Ye , 1,2College of Engineering, Southern University, Baton Rouge, LA70813, USA and 3,Broadcasting Department, Liaoning Radio and Television Station, ShenYang, China
    ABSTRACT

    Information security plays a critical role in data transmission. The information being transmitted can be protected by watermarking, cryptography or steganography to be against malicious tempering. To ensure confidentiality in digital image transmission, a secure dual watermarking scheme is presented by applying the chaotic logistic system and hyper-chaotic dynamical system. Chaotic watermarking is conducted in the spatial domain where variable length hashing is selected in preprocessing stages. The secret key is generated by the chaotic sequence using the chaotic logistic map for pixel shuffling so that controlled amount of distortion is inserted into the host digital image. Watermarking has been made after the chaotic watermark is embedded into the shuffled image. To strengthen the security, the hyper-chaotic system is introduced to generate chaotic blocks for block scrambling to achieve dual chaotic watermarking. Characteristics analysis is conducted on multiple examples. Potential effects induced by the chaotic driving parameter on processing time and integrity authentication of chaotic dual watermarking are also analyzed in detail.

  • Adopting Measures to Reduce Power Outages
    Abdullah M. Shaalan ,Department of Electrical Engineering, King Saud University, Riyadh, Kingdom of Saudi Arabia
    ABSTRACT

    This work investigates and evaluates the electric energy interruptions to the residential sector resulting from severe power outages. The study results show that this sector will suffer tangible and intangible losses should these outages occur during specific times, seasons, and for prolonged durations. To reduce these power outages and hence mitigate their adverse consequences, the study proposes practical measures that can be adopted without compromising the consumers’ needs., satisfaction,and convenience.

  • Difficulties Facing Power System Planning in Developing Countries
    Abdullah M. Shaalan ,Department of Electrical Engineering, King Saud University, Riyadh, Kingdom of Saudi Arabia
    ABSTRACT

    In developing countries, power system planning is difficult, costly and involves many uncertainties.for example, uncertainties associated with future load forecasting, the constraints imposed on investment, the type and availability of fuel for the generating units, the need for consolidating dispersed electric utilities in the isolated regions. This work attempts to describe how these aspects are analyzed and assessed based on two major considerations, namely, reliability and cost. A case study considers two separate systems in a fast-developing country, each of which must be reinforced to meet the future predicted loads. The benefits of reinforcing separately or reinforcing by interconnecting the two systems are demonstrated. Uncertainties having a signifi-cant impact upon the decision-making process in the planning process are also addressed.