Volume 4 Issue 1
Abstract
The purpose of this paper is to give a preview into the deployment and management of 5th Generation (5G) wireless network in Nigeria thereby addressing technical challenges of 5G deployment, assisting in the establishment of a 5G ecosystem, ensuring cost-effective implementation, management, and deployment in a timely manner in Nigeria. Data forecasting, and cost analysis were adopted for this study as the preferred tool to be used. It involved studying various network business deployment models, market demand and subscriber’s growth, and the cost for deploying 5G network equipment’s. The result showed that Infrastructure sharing based on Technology or based on Business/ownership are the preferred method for deployment cost reduction. Results obtained for subscriber’s growth forecast using optimistic, normal, and pessimistic scenarios are 171.52%, 163.35%, 155.19% respectively for the next 10 years. Also, deployment cost was observed to varies with population density and projected coverage area as for the case of Port Harcourt and Ahoada which are 12,069,144,108 dollars and 143,680,287 dollars, respectively. This work will contribute to the knowledge of Nigeria government in the Telecommunication sector, network operators to fast forward the rollout of 5G network in Nigeria and its management to reduced cost for the benefit of the Nigeria user. Also, this study adds to the body of knowledge by addressing technical issues, contributing to the formation of a 5G ecosystem, and maintaining cost-effective and speedy rollout of the 5G network across the country.Author(s) and Download Link
Michael E. Ogbonnaya, Sunny Orike, Barinyima NkoiJournal of Newviews in Engineering and Technology (JNET), April, 2022 pp1-13 [Online Full Text] of
An Overview of the Deployment and Management of 5th Generation (5G) Wireless Network in Nigeria
Abstract
This paper ex-rays the capacity of slaughter roundabout to address the traffic challenges by studying the traffic at the intersection. Slaughter intersection is one of the busiest intersections in Port Harcourt. Traffic volume count and analysis was carried out at the intersection and converted to equivalent Passenger Car Unit per hour (PCU/hr). The study revealed that, the intersection attracts a traffic volume of 3411 PCU/hr with a practical rotary capacity of 3209 PCU/hr. These capacities are about 13.7% and 7% higher than the recommended rotary capacity of 3000 PCU/hr given by the Indian Road Congress (IRC) making the present intersection inadequate and incapable of handling the present traffic set-up at Slaughter intersection leading to traffic problems. Further analysis on the four approaches revealed that they are undersaturated with degree of saturation of 0.31 (31%), 0.29 (29%), 0.45 (45%), and 0.23 (23%) for the North, East, South and West approaches, this is an average of about 0.53 (53%) below 0.85 (85%) of recommended traffic demand. Hence, the traffic situation experienced at Slaughter roundabout from field observation, were as result of illegal trading around the intersection, road user behavior, lack of pedestrian crossing facility, absence of pavement markings, lack of packing facility and not the flow from the approaches. The study therefore recommends an improved design of the intersection, parking facilities, pedestrian crossing facilities, a stop to illegal trading and markets around the intersection, provision of a flyover in the Trans-Woji section of the intersection.Author(s) and Download Limk
Captain G. Otto and Bariyiga SimeonJournal of Newviews in Engineering and Technology (JNET), April, 2022 pp14-21 [Online Full Text] of
Capacity Assessment of Slaughter Rotary Intersection
Abstract
Cost overruns are major problems that face fabrication industry in Nigeria and can lead to numerous negative effects such as project delay, abandonment, and poorquality delivery. This research focuses on evaluating various factors responsible for delay impact on the cost of fabrication processes in fabrication industries. It involves the use of stochastic methods in the acquiring of relevant data. The effect of time overrun on completion cost of construction project was evaluated using regression analysis, carried out on MS Excel and MATLAB. Significant factors that contributed to cost overrun were change order, change in drawing, material/fabrication delay, design development, and change in specifications. The significant factors are the severe factors that are responsible for delay, which impacts negatively on the financial status of fabrication industries. The result showed that, out of the six critical delay factors (the predictors), only three were statistically significant upon the dependent variable (cost overrun), as they showed a p-value less than the alpha(α) level of .05. It was observed that most of these delays had high level of occurrence and were attributed to lapses on the company owners and contractors utilized for projects. This research provides a basis for oil and gas fabrication companies to reduce frequent time overrun of the critical delay factors caused by clients, consultants and contractors through monitoring and controlling them to keep cost overrun at bay.Author(s) and Download Limk
Ezenwa, S. U. O., Nkoi, B., and Isaac O. E.Journal of Newviews in Engineering and Technology (JNET), April, 2022 pp22-33 [Online Full Text] of
Impact of Critical Delay Factors on Project Cost Overrun in Offshore Fabrication in Nigeria: A Case Study.
Abstract
Drilling operations are impossible without the use of drilling mud. However, the commonly used oil for oilbased mud is diesel, but studies have shown it is toxic, which adversely impacts the environment. Hence the need for alternative oils which possess low toxicity and are biodegradable. Past works have shown that plant oil can be used to formulate competent environmentally friendly oil-based muds. In this study, three different oil samples were investigated; Palm kernel oil (PKO), a blend of Limonene oil with PKO and diesel oil which was our control sample. The physiochemical properties, rheological properties, sand content, pH, fluid loss, cake thickness and cutting carry index (CCI) of the formulated mud samples were tested and compared. The blend of limonene oil with palm kernel oil influenced the physiochemical properties of palm kernel oil, as its density and viscosity were increased. The Rheological behavior of the three mud samples were characterized using the Power Law Model where the Flow behavior index (n) were all less than 1, thus indicating that they were all pseudo plastic fluids, which is desirable for drilling fluids. PKO mud and the blend of limonene/PKO mud had better results when compared to diesel-based mud. The former had higher mud densities of 8.9ppg each, less than 0.25% sand content, pH level of 8 and 9 respectively, which is within the required API standard range, filtrate volumes of 37ml and 32ml, lesser mud cake thickness of 1.5mm and 1.2mm respectively, and a higher CCI. Limonene/PKO mud gave the best result, proving that blends of plant oils can be combined in formulating a competent drilling fluid. Finally, this study has proven that PKO and a blend of limonene with PKO are suitable for drilling and can be used in place of diesel oil.Author(s) and Download Limk
Takon, N. N., Dune, K. K. and Wami, E. N.Journal of Newviews in Engineering and Technology (JNET), April, 2022 pp34-45 [Online Full Text] of
Formulation and Performance Evaluation of Environmentally Friendly Oil Based Mud Using Palm Kernel and Limonene Oils
Abstract
The relationship between welding voltage, welding current and arc length was investigated in this study. Shielded metal arc welding (SMAW) process was used to weld API 5L X65 line pipes at welding current of 80 – 200A and arc length of 1.5 – 3.5mm. First and second order polynomial equation and Amson models were also used to study the welding voltage as a function of current and arc length. The results revealed that increase in current and arc length lead to corresponding increase in voltage. The welding voltage increased from 19.48 – 23.82V at constant arc length of 1.5mm and from 22.25 – 26.77V at 3.5mm arc length, as current increased from 80 – 200A. Voltage increase was more influenced by increase in arc length than increase in current. Welding currents between 140A and 180A and arc length between 2mm and 3mm are recommended for optimum quality welded joints. The analysis of the model performance showed that there was high correlation between the predicted and the measured welding voltage values (R2 up to 99%). However, the predictions from the second-order polynomial model slightly edged the Amson and the first-order polynomial models. Therefore, using either of these models could be helpful in deciding on the range of welding input parameters that can be used to optimise welding quality and productivity in the SMAW process.Author(s) and Download Limk
Ekwe, D. U, Isaac, O. E. and Nkoi, B.Journal of Newviews in Engineering and Technology (JNET), April, 2022 pp46-56 [Online Full Text] of
Estimation of Welding Voltage from Welding Current and Arc Length in SMAW Process
Abstract
Property developers in Port Harcourt are often faced with the challenge of completing residential building projects within the scheduled times and costs due to factors that include weather, inadequate cash inflow, government policies, and inflation. About 41 private residential building projects completed between the years 2000 and 2018 were surveyed with the aid of questionnaires, and it was found that the highest cause of both delay and cost overrun was inadequate cash flow. A non-linear regression time-cost model was formulated based on the Bromilow’s Time-Cost (BTC) model and found that it takes 2289.2 working days to complete a private residential building project per million Australian Dollar. Predictions were made for construction durations (times) and construction costs with the derived model, which was found fit and adequate with an R2 value of 0.6137. This indicates that the BTC model is applicable to private residential building projects in Port Harcourt.Author(s) and Download Limk
Kenneth Miebaka Oba and Sotonye Ernest GeorgeJournal of Newviews in Engineering and Technology (JNET), April, 2022 pp57-65 [Online Full Text] of
Development of a Time-Cost Model for Private Residential Building Projects in Port Harcourt, Nigeria
Abstract
This study aims at guiding against fatigue failure to enhance fatigue life. The question of crack initiation, propagation, and failure in parts undergoing stress reversals or repeated stresses is a problem in machine design. Stiffness is degraded, and strength is reduced. Fatigue-based analytical model has been developed. The design philosophy is set on Design for Finite/Infinite life in which the design stress is below some fatigue strength, the endurance limit. Finite/Infinite fatigue life design tool (and calculations using Marin equations) was utilized to obtain the shaft specimen endurance limit of 235.7 MPa. Below this stress level, fatigue life was prolonged. Attention is also paid to Fail safe design, where cracks initiate and propagate; then a structure (composite material) is designed (against stress concentrations) to impede the crack growth. The materials for the shaft (steel matrix and carbon laminates) are notable for certain properties such as strength, which is due to choice, treatment, or processing, and is an inherent property of the part. Finally, there is Evaluation of stiffnesses and strengths. Stiffness depends on both the modulus of elasticity and the geometry. Primary parameters were calculated (fatigue stress concentration factor of 1.5) to aid other parameters (endurance limit of 235.7). The fiber laminates reinforced the matrix. Elimination of degradation in fatigue life of the elastic property produced enhancement. Strength is present whether there is load on the material. The study shows that by using composite materials and designing below the endurance limit, fatigue life of the shaft subjected to loading can be prolongedAuthor(s) and Download Limk
Steven Odi-Owei, Barisua E. Ngekpe, Kenny E. Ayoka and Barinyima NkoiJournal of Newviews in Engineering and Technology (JNET), April, 2022 pp66-73 [Online Full Text] of
Enhancement of Fatigue Life of Shafts
