In this paper, the guidance and control algorithms of an autonomous multiple satellite assembly are developed in a general keplerian orbit. The guidance algorithms are based on defining the velocity profile of each satellite in two different segment of space. In the first segment, the guidance law utilizes the analytical closed form solution of the

This paper presents a Usability study of the Nigerian Hospital websites, through usability testing of some sample hospital websites in Nigeria. The study aims to provide better understanding of the design features and content that offers an easier way of enquiring for some medical advice. Selected participants for the usability testing were given t

Introduction: Studies reported that trans-obturator mid-urethral sling (TOT) is superior in safety and efficacy when compared with retro-pubic trans-vaginal tape (TVT) with regard to bladder, vascular and urethral injury. The purpose of this study is to determine if the TOT is equivalent to the TVT by using patient-reported outcomes for the treatme

In this paper, a graphical user interface (GUI) simulator is developed to analyze the satellite orbital and attitude motion during each mode of operation. This tool enables the mission analysis engineer to quickly assess the satellite performance and to verify the mission analysis requirements. In addition, it can be used to test the performance of

This paper investigates the orbit design procedures of a remote sensing satellite mission. The mission objective is to gather images over an area of interest for a variety of applications such as land monitoring, digital mapping, minerals exploration, and deforestation. The design procedures are mainly driven by the payload performance, the satelli

Impersonation and piracy of intellectual properties remain an indispensable problem across the globe. Currently over millions of digital songs, images and videos are copied illegally during file-sharing over the networks, costing loss of revenue to multimedia industries. Digital Watermarking (DW) is an efficient method that embeds an imperceptible

Rain induced attenuation is the main reason for the decrease of Space-Earth communication links’ received signal strength. This is more perceptible in the tropical regions due to copious heavy rainfall throughout the years. RazakSAT is a Malaysian remote sensing satellite that utilizes two frequencies which are the X-band and S-band. The X-band f

The present study examined the relationship between stressors, resilience resources and well-being in adolescents. The specific aims were (i) to differentiate between resilient and non-resilient adolescents in terms of their resilience resources, and (ii) to examine the role of resilience resources on the relationship between stressors and well-bei

The present study examined the relationship between stressors, resilience resources, and well-being in adolescents with low socio-economic status in Malaysia. The specific aims were: (i) to differentiate between resilient and non-resilient adolescents in terms of their resilience resources; and (ii) to examine the role of resilience resources on th

With globalization, the Internet and increasing demands from citizens,governments around the world are pressured to serve citizens and businesses electronically thus to adopt policies that reduce bureaucracy and be agile to changes in structure. This entails that the electronic government that has been serving as a means for support in the last dec