Open Access Original Research Article

State of Readiness of Nigerian Construction Industry towards Digital Transformation: The Construction Professionals’ Perception

F. O. Ezeokoli, C. I. Onyia, C. B. N. Bert-Okonkwor

Journal of Engineering Research and Reports, Page 1-11
DOI: 10.9734/jerr/2019/v4i216896

Aim: This study examines the extent of readiness of Nigeria construction firms toward digital transformation within the study area.

Study Design: It was a survey research, questionnaires containing information relating to digital Technologies, trend and transformation were administered randomly to selected construction practitioners in Anambra State, Nigeria.

Place and Duration of the Study: The study was conducted in Anambra State, Nigeria for a period of 6 months.

Methodology: A total of 84 questionnaires were administered to selected respondents; 80 copies were completed, returned and found useful, thus, giving a response rate of 95%. Data collected were analysed and presented using mean, percentages, relative importance index (RII), bar charts and pie charts.

Results: The study found out that 63% of construction professional is satisfied with their firm readiness to digital transformation. However, the application of digital technologies skills and its transformation in the study area is still at foundation level. The use of mobile and social technologies (83%), entrepreneurship (73%) and Customer experience & strategic thinking (59%) are common in the study area while InMemory Databases skills (36%), Cloud Computing (39%) and Big Data Analytics (44%) are rare. Furthermore 35%, 53% 1% and 11% of the firms are planning to kick up digital transformation, undergoing some forms of digital transformation, attained or don’t see the need for digital transformation respectively.

Conclusion: The study was concluded by recommending that construction practitioners should be properly sensitised on the need to understand and conceptualise on how digital transformation and technology will impact construction processes & activities and ability to manage or work within digitally-savvy environments.

Open Access Original Research Article

Pick and Place Process Optimization for Thin Semiconductor Packages

Rennier S. Rodriguez, Frederick Ray I. Gomez

Journal of Engineering Research and Reports, Page 1-9
DOI: 10.9734/jerr/2019/v4i216897

Nowadays, electronic manufacturers trend are to become thinner and thinner especially those electronic gadgets that is very handy and convenient on our daily necessity. Challenge with the leading manufacturers is the production and development of less size gadget yet with richness of available application and uses that we can work on with what can please its consumer for their convenience and satisfaction. As with the semiconductor company, correlation between becoming thinner versus manufacturing capability become significantly opposite, as the package become thinner the more complex its related process can be. This study covers innovative approach in die attach station on critical handling of thin die packages. Lessons and learning were documented from Ball Grid Array (BGA) packages as first to be evaluated with thin package requirements.  Also discussed herewith are documented defects and related issues during trials and die attach builds that has been a show stopper on its early production.

Open Access Original Research Article

Design and Development of Power Driven Gari Fryer

S. A. Adegbite, W. B. Asiru, M. O. Salami, C. F. Nwaeche, K. K. Ebun, A. A. Ogunbiyi

Journal of Engineering Research and Reports, Page 1-15
DOI: 10.9734/jerr/2019/v4i216898

A continuous process power driven gari fryer was designed, fabricated and tested at the Federal Institute of Industrial Research, Oshodi. (FIIRO), Lagos, to fry large quantity of cassava mash using locally available materials. The fryer which consists of major two sections; one to gelatinize cassava mash while the drying of the mash take place in the other section. The essential components of the fryer include feeder, frying troughs, rotating paddle arrangement, central shaft, coupling, top cover, gas burners, discharge sprout, main frame, insulation wall, sprocket and internal combustion engine. In operation, the rotating paddles convey the cassava mash during the gelatinization and drying process from the feeding point to the discharge sprout to obtain finished gari product. At constant speed of 8 rpm, the result showed that the time of frying ranged between 14 minutes to 17 minutes with an output of 83.2 kg/hr while the percentage yield of gari obtained ranged from 52.8% - 74.7%. Thus it is established that the capacity of the fryer is 500 kg per day as against the manual method of frying where 5 kg of gari is obtained within 30 minutes (80 kg/day) for 8 hours frying operation in local cassava processing industry in Nigeria. Hence, this makes the fryer to be suitable for gari production for small to medium scale enterprise.

Open Access Original Research Article

Design Modification of an Indigenous Extruder

O. O. Koyenikan, O. J. Olukunle, A. P. Olalusi

Journal of Engineering Research and Reports, Page 1-11
DOI: 10.9734/jerr/2019/v4i216899

This research involved the design and modification of an existing fish feed extruder which was subjected to evaluation in order to produce floatable fish feeds. It was observed that the temperature of the extruded feed was on the average of 70°C with moisture content of 25% wet basis. The modifications incorporated into the existing extruder included the water pump, sprockets and chain, circuit box containing essential electrical components and temperature sensors.  The volume of hopper, weight of hopper, diameter of the screw auger, power required to drive the screw auger, volume of the extruding barrel, forces and weight acting on the chain, speed for driving the larger and smaller sprocket, length of the sprocket chain, weight of screw for each revolution, total load acting on the screw, torsional moment of the screw and diameter of shaft were designed. Another modification was the incorporation of a system that could raise the barrel`s internal temperature for five different temperatures between 90°C and 130°C. The functional efficiencies of the existing and modified extruder were 56.52 and 91.30% and their throughput capacities were 0.53 and 1.24 kg/hr respectively.

Open Access Original Research Article

Design and Construction of an Atmospheric Pressure HF Plasma Source

Mohammad Hasanur Rashid, Md Herokuzzaman, Md Masudur Rahman

Journal of Engineering Research and Reports, Page 1-9
DOI: 10.9734/jerr/2019/v4i216900

Atmospheric pressure plasma sources used in many industrial, environmental, light sources, biological, and medical applications. Aiming these prospects, an effort has been remunerated for the design and construction of a cost-effective atmospheric pressure high frequency (30 KHz) plasma source. The major sections include in this source are, (i) DC power suppliers, (ii) A set of Class A push-pull power amplifiers, (iii) Ferrite core high-frequency power transformer, (iv) Impedance matching network, and (v) Electrode design for plasma production. Two power suppliers have been considered; one is a 12V DC for biasing the base of the 2N3055 power, and the other is a 90V DC for biasing the Class A push-pull power amplifier. Class A push-pull power amplifier is chosen because of its high efficiency of about 50% concerning other types of amplifiers. Ferrite core high-frequency power transformer is designed with a turn ratio of 1:3 in order to step up the voltage to a certain level for producing atmospheric pressure plasma. An impedance matching network is designed to transfer maximum power from the source to the plasma load.