Open Access Original Research Article

Investigation and Optimization of Production Variables: A Case of Plastic Manufacturing Industry

Chukwuemeka Daniel Ezeliora, Maryrose N. Umeh, Anodebe Malachy Dilinna

Journal of Engineering Research and Reports, Page 1-16
DOI: 10.9734/jerr/2020/v15i117134

The study evaluates and analysis the extrusion plastic production variables in Innoson Plastic Manufacturing Company, Nnewi, Anambra State, Nigeria. The research method adopted is the application of statistical tools and design of expert tools to evaluate and to analyze the influence of the variables. The statistical correlation of the variables is to understand the significant relationship between the variables. The parameters are all significance except time. This show that time is not significant in modeling the system. The use of design expert was applied to evaluate the extrusion plastic production variable to understand what the variables portray and its influence on production. The mixture design method of D-optimal Non-Simplex Screening model was used to optimize the production variables which entails that the best quantity of product that is to produce is 9204.461 units. The results show that the industry should be conscious of highly influence input variable during production.

Open Access Original Research Article

Challenges and Strategies towards Entrepreneurship Education and Learning among Ghanaian Built Environment Students

Callistus Tengan, Ernest Kissi, Tom Mboya Asigri, Bridget Tawiah Badu Eshun

Journal of Engineering Research and Reports, Page 17-28
DOI: 10.9734/jerr/2020/v15i117135

Entrepreneurship is now considered as a major contributor to global economic growth. Internationally, entrepreneurship or enterprise-based modules are increasingly being incorporated into non-business courses. Entrepreneurship education is believed to foster entrepreneurial learning, and help individual students develop a set of skills and competencies that can facilitate and support their entrepreneurial activities. Despite the profound benefits of entrepreneurship education, it is still not fully blown in Ghana. This study sought to identify challenges in the entrepreneurship education process and to propose strategies to enhance effective entrepreneurial learning. The study employed a mixed research design by means of preliminary literature review and subsequently a survey using the structured questionnaire approach. The data collected was analysed using the One-sample T-test. The analysis revealed eight (8) challenges to entrepreneurship education and twelve (12) strategies to enhance entrepreneurial learning amongst built environment students. This paper reports the investigation results of challenges and strategies of entrepreneurship education and learning among built environment students. The findings of this study are very useful for improving entrepreneurial activities in Ghana as well as Africa in general.

Open Access Original Research Article

Lead Scratch Resolution through Wirebonding Process Optimization on QFN Packages

Jonathan Pulido, Frederick Ray Gomez, Edwin Graycochea Jr.

Journal of Engineering Research and Reports, Page 29-33
DOI: 10.9734/jerr/2020/v15i117136

With the continuous trend of new technologies in semiconductor manufacturing assembly, challenges and issues are unavoidable. This paper presents an improvement done in quad-flat no-leads (QFN) leadframe package to resolve the quantity of unit rejection due to leads scratch underneath the leadframe. Moreover, the reject manifestation was captured after wirebonding process. Parameter optimization particularly for the second bond with the combination of bond force and bond scrubbing parameters was done to totally eliminate this type of issue after wirebonding process. With the wirebonding process optimization and improvement done, a reduction of 95 percent of leads scratch occurrence was achieved.

Open Access Original Research Article

Optimization of Heat and Mass Transfer Process in Single Screw Floating Fish Feed Extruder

Ogundana Odunayo, Oyerinde Ajiboye

Journal of Engineering Research and Reports, Page 34-43
DOI: 10.9734/jerr/2020/v15i117137

To optimize the extrusion conditions of locally developed single screw floating fish feed extruder. A factorial experiment in completely randomized design was employed to study the effect of extrusion variables: feed moisture content (20, 30, and 40% wet basis), screw speed (158.5, 245, 334 rpm), die size (4, 6, 8, mm) while checking for their effect on Product temperature of the feed produced. Product temperature is strongly related to the extrusion process parameters under study. Product temperature decreased with increasing moisture content.  Optimum condition was found at 74.11⁰C at the feed section, 80.83⁰C at compression section and 85.15⁰C at metering section, screw speed at 330.5 rpm, feed rate at 0.6 kg/min, die size at 7.47 mm, moisture content at 39.87%, particle size at 1.1., and the  coefficient for the final model is 0.93 which indicated that the model is good. The extruder was found to be cost efficient for floating fish feed production. Thus, model-fitting using response surface methodology was performed to examine their effect on product temperature. Quadratic coefficients fit the extrusion data very well, better than linear models. The equations relating the various dependent and independent variables were established to predict the performance of the machine.

Open Access Original Research Article

Experimental Investigation of the Electrical Resistivity of Cement Dust

Stephen Ayodele Odewale, Jacob Ademola Sonibare, Oluwatobiloba Alade Ayofe, Michael Abidemi Oke

Journal of Engineering Research and Reports, Page 44-51
DOI: 10.9734/jerr/2020/v15i117138

Electrical resistivity is one of the important particle–based factors influencing the performance of an Electrostatic Precipitator (ESP), a particulate control device commonly employed in most cement industries in Nigeria. Therefore, this study investigated the electrical resistivity of Cement Kiln Dust (CKD) across nine locally-operated cement manufacturing plants in Nigeria with the aim of tracing causes of performance problems associated with the ESP used for dust control in the plants. Samples of CKD were collected from the ESPs of these plants and tested for their resistance using the two probe method. The measured electrical resistivities were in the range of 108 – 1011 Ω·cm and showed strong dependence on temperature and slight variation with particle size. The CKD’s resistivity increases as temperature rises from ambient to about 250℃ and declines as temperature rises above 300℃; Nevertheless, the resistivities are adaptable for efficient ESP performance in the collection of cement dust.