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All Journal Journal of Current Social and Political Issues Vokasi UNESA Bulletin of Engineering, Technology and Applied Science CSID Journal of Infrastructure Development
Mohammed, Musa
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Religion Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Engineering Environmental Science Mechanical Engineering Social Sciences Transportation

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Simulation and Experimental Evaluation of a 5-Level Cascaded H-Bridge Inverter Abdulwahab, Ibrahim; Ismaila, Mahmud; H. Sulaiman, Sulaiman; Abdullahi Shehu, Ibrahim; Mohammed, Musa
Vokasi Unesa Bulletin of Engineering, Technology and Applied Science Vol. 2 No. 2 (2025)
Publisher : Universitas Negeri Surabaya or The State University of Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/vubeta.v2i2.37172

Abstract

Multilevel inverters (MIs) are designed in such a way that different DC sources could be used to achieve the desired output voltage. This includes high quality output voltage, reduction of voltage stress on the switches, low common mode voltages, better harmonic content and reduction in total harmonic distortion compared to the conventional voltage source inverter. As there will be reduction in THD the size of the filter will also get minimized which decreases complexity of the system. Sinusoidal pulse width modulation technique is commonly employed in MIs in order to obtain undistorted output voltage by eliminating lower order harmonics. Cascaded H-bridge MIs are the most preferable for this purpose due to their modularity, reliability, less usage of clamping diodes and ease of control of circuitry and it also reduces the switching and conduction losses of the system. In this study, 5-level cascaded H-bridge inverter was simulated in MATLAB/Simulink software environment. A prototype of the simulated 5-level inverter was also constructed and the result was compared with that obtained from simulation. The results of both the simulation and experimental measurement have the similar output voltage waveform and the THD value of 33.12% and 33% for the simulation and experiment respectively.
Challenges of Administering COVID-19 Vaccine in Some Selected States of Northeast Nigeria Sambo, Usman; Ibrahim, Suleiman; Mohammed, Musa
Journal of Current Social and Political Issues Vol. 1 No. 1 (2023): Journal of Current Social and Political Issues
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jcspi.v1i1.443

Abstract

The COVID-19 pandemic has successfully registered itself among the league of global epidemics that the world is currently battling. The virus, which emerged in December 2019 in China, quickly spread worldwide, paralysing socioeconomic, political, and cultural activities around the globe. Nigeria is one of the African countries that is most affected by the COVID-19 pandemic, especially socioeconomically and politically. Although the pattern of spread in the country indicates a higher incidence in the South than in Northern Nigeria, some factors made the case in Northern Nigeria an interesting study. The study is an examination of the challenges that influenced the process of administering the COVID-19 vaccine in Northeast Nigeria. The study used a quantitative phenomenological study as a methodology. Data were collected from selected informants with relevant and valuable information on the subject matter in the area of study. The data obtained were analysed and interpreted using content analysis. Culture, religion, and perception, in addition to the attitude of the political class, all contributed to the negative perception of COVID-19 as a pandemic and its vaccine as a preventive measure. Most of the inhabitants of Northeast Nigeria are found to have harboured negative thoughts against the Virus and its vaccination because of some reported cases of side effects and the way the politicians turned the pandemic into a racket of money-making. The study recommends, among others, that royal fathers, religious clerics, and opinion moulders should be rigorously engaged in a massive campaign to disabuse all negative perceptions and to convince the populace on safety and prevention.
Assessment of Project Risk Performance of Selected Mass Housing Infrastructures in Northern Nigeria Adindu, Chinedu Chimdi; Muhammed, Abdulhaqq Onoruoyiza; Egila, Emmanuel Ashem; Mohammed, Musa
CSID Journal of Infrastructure Development Vol. 7, No. 3
Publisher : UI Scholars Hub

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Abstract

Mass housing projects in Northern Nigeria often suffer from insufficient risk management, impacting timely delivery, budget adherence, and quality standards. This study assesses risk vulnerabilities in selected mass housing infrastructure projects, focusing on information risks related to roles, responsibilities, scope, requirements, and operations. A mixed-methods approach was employed, with data collected from 465 construction professionals across 20 states, with a 64.58% response rate. Analytical tools, including regression and Pearson correlation, identified critical risks such as underfunding, weak project monitoring and control, and the failure to deliver end-user value. Findings reveal that these risks significantly undermine project outcomes, highlighting the need for robust risk management strategies. A risk management framework is proposed to prioritize and address these vulnerabilities throughout the project lifecycle. This research contributes to the field by offering actionable insights for policymakers and practitioners to enhance mass housing delivery, ensuring alignment with end-user needs and project goals.
Co-Authors Abdullahi Shehu, Ibrahim Abdulwahab, Ibrahim Adindu, Chinedu Chimdi Egila, Emmanuel Ashem H. Sulaiman, Sulaiman Ibrahim, Suleiman Ismaila, Mahmud Muhammed, Abdulhaqq Onoruoyiza Sambo, Usman