objective: parents are believed to be among the most influential adults who have a deterministic role in the success of interventional programs on adolescents' reproductive health. the aim of this study is to describe parents' perceptions and attitudes towards adolescent reproductive needs, experiences and associated factors. method: a population-based study of 539 parents of adolescent boys, a...

In the near future, existing terrestrial radio networks are envisioned to integrate with satellite systems in order to provide global coverage. In order to establish communication for both nonhand-held and hand-held user terminals, the radio link design must allow fulland half-duplex operation, respectively, where the latter is desirable when radiation power restrictions are imposed. In additio...

K. Badron , A.F. Ismail, , M.R. Islam , A.R Tharek and J. Din Electrical and Computer Department, Kulliyyah of Engineering, International Islamic University Malaysia Fakulti Kejuruteraan Elektrik, Universiti Teknologi Malaysia Abstract. Radiowave propagation plays a very important part in the design and eventually dictates performance of space communication systems. The requirements of today’s ...

A satellite communication is suitable for broadcasting service and long-hual transmission based on telecommunications. In the satellite communication environment, unauthorized user should not have to obtain his/her required services from the satellite communication systems without authentication. Therefore, authentication is an important security technique to prevent illegal service requests. Q...

Satellite communications system uses various satellites to transmit radio signals between earth terminals. A typical operational link includes an active satellite and two or more earth terminals. Satellite communication is one of the significant factor from the space programs and has made a major contribution to the international communication. There are various types of information that can be...

Quantum computing offers revolutionary solutions in the field of computer sciences, applying the opportunities of quantum physics which are incomparably richer than classical physics. Although quantum computers are going to be the tools of the far future, there are already a few algorithms to solve problems which are very difficult to handle with traditional computers. Perhaps the easiest examp...

Secure communications is becoming increasingly relevant in the development of space technology. Well established cryptographic technology is already in place and is expected to continue to be so. On the other hand, information theoretical security emerges as a post-quantum versatile candidate to complement overall security strength. In order to prove such potential, performance analysis methods...

An information system formed by HAP (High Altitude Platform) will be a new generation-system for the wireless communications and HAPS (HAP Station) communication system combines the advantages of both terrestrial and satellite communication systems and avoids, to different extents, their disadvantages. Third generation (3G) mobile technology which is specified by the third generation partnershi...