Refuse dumpsites are found scattered within and outside cities in Nigeria and the open burning of these dumps is a common practice mainly as a waste and odour reduction measure. Open incineration of wastes emits dangerous gases into the atmosphere. The environmental and public he...
Open access
Research Article10.9734/jerr/2020/v12i317083
The paper focused in addressing the silicon die chippings defect at the wafer sawing process of an extremely small semiconductor package. In-depth potential risk analysis and Pareto diagram were done to identify the top reject contributors and eventually resolve the issue. A comp...
Open access
Research Article10.9734/jerr/2020/v12i317082
Aim: The study aimed at utilizing finite element modeling approach for extrapolation of BOD5 along the longitudinal length of the stream. Study Design: The linear element method was used for analyzing the Biological Oxygen Demand (BOD) transport along the longitudinal length of t...
Open access
Research Article10.9734/jerr/2020/v12i317081
With new and continuous semiconductor technology trends, challenges in assembly manufacturing are inevitable. This paper focused on the elimination of assembly defects particularly package chip-out and scratch at the singulation end-of-line (EOL) process of a semiconductor device...
Open access
Research Article10.9734/jerr/2020/v12i317079
The inhibitive ability of pawpaw, neem and curry leaf extracts on corrosion of mild steel in sulfuric acid solution were investigated in this work. The extracts obtained from their respective leaves, were characterized to determine their phytochemical constituents as well as func...
Open access
Research Article10.9734/jerr/2020/v12i317080
A non-destructive way to determine the ripeness of watermelon is very difficult, by outward characteristics such as size or external colour and used methods include different limitations. In this study a simple and intelligent method to determine the ripeness of watermelon was de...
Open access
Research Article10.9734/jerr/2020/v12i217077
With new and continuous technology development and breakthroughs, few to several challenges in semiconductor assembly manufacturing are inevitable. One critical assembly process often affected with these technology trends and changes is the wirebond process. In due course, this p...
Open access
Research Article10.9734/jerr/2020/v12i217078
In a bid to optimize the performance of a Pelton Wheel Turbine developed the performance evaluation of the turbine at various conditions was carried out using a portion of the overflow from the University of Ilorin (UNILORIN) dam. The collected overflow has a net head of 4 m, flo...
Open access
Research Article10.9734/jerr/2020/v12i217075
The paper presents a design and study of impedance matching for radio frequency (RF) circuit application of common-source amplifier topology. Matching networks for input and output sides of the amplifier were determined from the S-parameters given for the transistor at frequency...
Open access
Research Article10.9734/jerr/2020/v12i217076
The paper focused on the elimination of die crack occurrence at the diebond process. Design of experiment (DOE) was done on the pick and place rubber-tip design and an improved design was finalized. The improved rubber-tip configuration with smaller vacuum design and full contact...
Open access
Research Article10.9734/jerr/2020/v12i217074