The primary objectives of this research are to identify the underlying clusters of design variables affecting the perceived usability of a webpage and to examine the effects of webpage design variables on webpage performance. Fifty-seven design variables and 10 underlying clusters that conceptualise the structure of user webpage judgement are identified through content analysis on literature and structured interviews, balanced incomplete block user survey administration and cluster analysis. Five clusters are selected to conduct three experiments that quantify the change in user aesthetic preference, perceived ease of interaction and interaction speed as a function of loading speed, image colour, image size, font size, link style, and column width. Results show that user performance alone is not a good indicator of aesthetic judgement and overall effectiveness of a webpage. The value of integrating global construct analysis processes and local controlled experimentation processes in ergonomic interface research is illustrated. Fifty-seven webpage design variables are defined, ranked and clustered according to perceived importance and overall preference. Experimental results illustrate that both technical performance and aesthetic factors are important webpage design considerations.
This paper focuses about the implementation of a secure authentication model for the wireless body area network using the features of biological signals and the process of shared key establishment during the time of configuration. There is a need for a secure online health monitoring system for Wireless body area network, but currently all the system engineered are working with complex key exchange algorithm. Recent researchers have proposed a secure biometric system for WBAN, but there is still a need to improve the security and likelihood prediction of the biometric signal at the receiving end making it more accurate. A system that uses biometric details for security must also be able to provide a predictive outcome at the other end. This paper tries to address these issues of security and likelihood estimation, thereby helping to achieve, more accurate and secure system placed for the online health monitoring scheme using WBAN. Also the security system for WBAN is proposed with low computational complexity for the secure transaction and with high power efficiency using key based cryptographic encryption algorithm.
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