Browsing by Author "Rukiya Mohammed"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Bandwidth Enhancement, Analysis, and Comparison of Microstrip Patch Antennas for Millimeter Wave
    (Addis Ababa University, 2025-05) Rukiya Mohammed; Murad Ridwan (PhD)
    In the rapidly advancing landscape of wireless communication technology, there is a pressing need for antennas that are compact, lightweight, cost-effective, and have a low profile. Microstrip patch antennas have emerged as popular choices in numerous wireless communication applications due to their inherent benefits such as lightweight, compact size, affordability, ease of fabrication, and high reliability. However, these antennas encounter challenges, notably in the form of narrow bandwidth and low gain. Various design factors influence the radiation properties of microstrip antennas, encompassing feeding techniques, substrate materials, patch configuration, and ground structures. This thesis is devoted to addressing the limitations of narrow bandwidth and low gain in microstrip patch antennas, specifically tailored for 5G mobile communication. In this study, we enhanced a microstrip patch antenna’s design to boost performance for 5G applications. By carefully adjusting its dimensions, the antenna achieved a bandwidth of 7.64% (2140 MHz), a return loss of -39.388 dB, and a VSWR of 1.021. These results show that our method significantly enhances the antenna’s performance compared to previous designs, making it more effective for 5G communication.
  • No Thumbnail Available
    Item
    Effect of Human Resource Management Practice on Organizational Performance; the Case of Ministry of Health-Ethiopia
    (Addis Ababa University, 2023-06) Rukiya Mohammed; Seifu Mamo (PhD)
    This study aimed to investigate the effects of human resource practices in public organizations in Ethiopia; the case of the Ministry of Health. The study utilized both an explanatory and a descriptive research design. The study population was comprised of all the 570 employees of the surveyed organization, and 235 self-administered questionnaires were returned properly, which was used to collect primary data. Descriptive statistics were computed to describe the characteristics of the variables in the study, while correlation and multiple regression analysis were used to establish the nature of the relationships between the independent and dependent variables. The findings indicate that there is a significant positive effect between recruitment and selection, training and development, compensation and performance appraisal, and organizational performance. The results support the theory of resource-based view that says competitive advantage comes from the resources that are possessed by an organization. This study concluded that the HRM practices have been adopted by the companies in order to achieve positive performance. This study suggests that executives should offer competitive compensation to their staff, effective performance appraisal, and sufficient training and recruitment.