The paper focused on the improvement done in chip on lead (COL) leadframe package assembly manufacturing to address the leadframe bouncing effect during die attach process. A new and enhanced process plate is designed with multi-hole configuration to provide a strong vacuum under...
Open access
Research Article10.9734/jerr/2020/v18i317208
Comparing the complexity of the hardware and the control system, cold gas micro thrusters are much more simplified than other propulsion thrusters. Numerical calculation was carried out for mass requirement, mass flow rate, valves, feed system and computational fluid dynamics wit...
Open access
Research Article10.9734/jerr/2020/v18i317207
The drying characteristics of Soybean curd residue (SCR) based fish feed were investigated using an oven at temperatures of 40, 50, 60, 70 and 80°C, and at a constant air velocity of 1.5 m/s. The ingredients composition for the fish feed were mixed and extruded using a single scr...
Open access
Research Article10.9734/jerr/2020/v18i217205
Solid waste management is challenging and incineration technique is more preferred to other methods in reduction of mass and volume, removal of odour and energy recovery in both industrial and residential environments. The challenges facing residents at Njokerio, Ng’ondu and Gree...
Open access
Research Article10.9734/jerr/2020/v18i217206
Checking a symbolic reliability expression for a flow network is useful for detecting faults in hand derivations and for debugging computer programs. This checking can be achieved in a systematic way, though it may be a formidable task. Three exhaustive tests are given when a rel...
Open access
Research Article10.9734/jerr/2020/v18i217203
Deficit irrigation is a strategy which could be applied to utilize water efficiently. The goal of the article was to review and examine different irrigation deficit to compare its crop morphological characters, yield, water productivity and water use efficiency under different cr...
Open access
Research Article10.9734/jerr/2020/v18i217204
The study focused on the physico-chemical characterization of raw water samples from the Kongou Gorou pond treated with almond powder from Moringa oleifera seeds. The powder which was used for the present study was dried in the oven for one month at the respective temperatures of...
Open access
Research Article10.9734/jerr/2020/v18i217202
Aims: This study proposed an alternative method for the estimation of maintenance cost of roads in Anambra State, Nigeria. The proposed method referred to as the permuted quadratic model (PQM) involves permuting of the dependent variable of the quadratic model. Place and Duration...
Open access
Research Article10.9734/jerr/2020/v18i117200
Driven by the company vision to become a high-volume manufacturing (HVM), increasing throughput in the manufacturing line is critical to meeting market demands. The ever-growing demand for integrated circuits in part requires additional capital investment to purchase new equipmen...
Open access
Research Article10.9734/jerr/2020/v18i117201
The paper focused in addressing the auto align defect at in-strip testing of a semiconductor scalable device in a leadframe technology. Pareto diagram and potential risk analysis were completed to identify the top reject contributors and eventually come-up with the robust solutio...
Open access
Research Article10.9734/jerr/2020/v18i117197
Education is the cradle of development and must be properly guarded. Higher institutions are citadels of learning engaging in high intellectual discourse that require quiet ambience. The high noise level in Nigeria’s institutions of higher learning has become a growing concern. T...
Open access
Research Article10.9734/jerr/2020/v18i117198
Aims: This study considered the optimal maintenance cost of water boreholes for a multiple pumping scenario in South-East Nigeria. The objective of the study was to determine the optimal maintenance cost of water boreholes for the Southeastern region of Nigeria. Place and Duratio...
Open access
Research Article10.9734/jerr/2020/v18i117199
Die attach epoxy dispensing is an automated factory environment that creates some special challenges. A robust production process begins with an understanding of the adhesives in their fluid state and which important parameters must be controlled. One of the most common problems...
Open access
Research Article10.9734/jerr/2020/v17i417196
This paper presents the modification and improvement done on the wire clamp and top plate (WCTP) design to eliminate the bouncing effect of the silicon die that leads to smashed ball reject during the formation of wire. The protrusion of the unit on the vacuum hole produced movem...
Open access
Research Article10.9734/jerr/2020/v17i417195
Heat-generating equipment (such as transformers, computer microchips, car engines, nuclear reactors, etc.) requires an efficient cooling mechanism to safeguard them from thermal degradation and to enhance their life span. The use of Nanofluids as opposed to conventional heat tran...
Open access
Research Article10.9734/jerr/2020/v17i417192