WiMAX (802.16) network security architecture has been described by giving priority Authentication problem in WiMAX. In WiMAX network, most of the security issues are addressed and handled in the MAC security sub-layer. Although Base Station (BS) or Service Provider are protected by different types of Security feature's however there are problems in the authentication mechanism. Privacy and key management (PKM) protocol is the lacking in authentication of Base Station or Service Provider which makes WiMAX networks defenseless to man-in-the-middle attacks, exposing subscribers to various...

This book, a case study which was conducted in Bangladesh, illustrates the evaluation of management of childhood cataract and analyzes the post-operative visual outcome of the patients. It consists of secondary and primary data which was experimented on 500 eyes with cataract of 300 children. Patients those were under 2 years, irrigation and aspiration, including primary posterior capsulorrhexis with anterior vitrectomy were done. The authors explore that early recognition and early surgery are crucial in childhood cataracts management; however, primary posterior capsulorrhexis and anterior...

Tobacco has close association with blood pressure is a known fact. Tobacco can be consumed as both smoking and smokeless tobacco. However, the relationship between smoking and smokeless tobacco use on blood pressure remain unknown, especially in tertiary level hospitals. This book, a cross-sectional study, was carried out to assess blood pressure parameters among adult male smokers and smokeless tobacco users. Total 420 male respondents were selected and divided into Group A consisting of 120 were smokeless tobacco users and group B consisting of 300 smoker patients. Statistical analysis was...