The maximum likelihood estimation method is an effective technique for estimating the parameters of the Weibull distribution. However, it is an arduous task to compute the parameters of the Weibull distribution using numerical methods, hence; various reliability software packages...
Open access
Research Article10.9734/jerr/2020/v16i217163
In this paper, we study the numerical approach of MHD Casson fluid flow over a permeable stretching sheet with heat and mass transfer taking into cognizance the various parameters present. A set of suitable local similarity transformations are used to non-dimensionalize the gover...
Open access
Research Article10.9734/jerr/2020/v16i217161
This study was carried to determine the level of heavy metals toxicity in swampy forest of Isoko South, Delta State, Nigeria. Sediments samples were collected from nine spatial points, within the swampy forest of Enwhe community of Delta State, Nigeria. The study area contained c...
Open access
Research Article10.9734/jerr/2020/v16i217160
This paper studies the challenges and behavior of epoxy material between the roughened Leadframe during the Die Attach process. Die bond on the roughened die-attach paddle (DAP) of epoxy has been a challenge for its manufacturability in terms of maintaining the target epoxy volum...
Open access
Research Article10.9734/jerr/2020/v16i117158
Exhaust emissions from vehicle traffic refers to the particles released into the air due to combustion of fuels, additives and wear of engine parts in the system during vehicle use. These emissions occur depending on the type of vehicle, type of fuel, combustion process and envir...
Open access
Research Article10.9734/jerr/2020/v16i117157
The importance of concrete as one of the major materials in the building and construction industry cannot be over emphasized due to the myriad benefits and versatility to humankind. However, its performance characteristics on the stability of engineered structures have mostly bee...
Open access
Research Article10.9734/jerr/2020/v15i417164
In this study, an extrusion process was studied in a cable manufacturing company located in Southeastern Nigeria. The critical-to-quality (CTQ) characteristic considered in the study was the cable diameter and the design effort was to reduce the possibilities of having cables wit...
Open access
Research Article10.9734/jerr/2020/v16i117154
This paper aims to identify the causes of package thickness related defects in compression mold process. Related defects include wrong package thickness, exposed wire and/or die and mold bleed out. There are three scenarios why package thickness problem is encountered in compress...
Open access
Research Article10.9734/jerr/2020/v16i117155
In this preliminary study, kenaf core fiber (KCF) was utilized as a natural filler for the preparation of the gellan gum/KCF biocomposite films. The films were prepared by casting gellan gum solutions containing glycerol and KCF, followed by gelation and drying. The weight ratio...
Open access
Research Article10.9734/jerr/2020/v16i117156
The present study has investigated the role of nano-SiC on microstructure and tribological properties of SiC/Cu nano-composite. The nano-composite powders have been cold compacted under a constant pressure of 480 MPa and sintered at 8600 C under argon gas for 2 h. SEM-EDS and XRD...
Open access
Research Article10.9734/jerr/2020/v15i417153
This work is discussed how to differentiate between two tricky models for sand stone formation by using the pressure transient analysis PTA for three Wells which are distributed in south, middle and north of X field. In the derivative curve these two models have the same sequence...
Open access
Research Article10.9734/jerr/2020/v15i417151
Economic analysis of gas turbine compressor inlet air precooling is based on the economical evaluation (maintenance, operations and personnel costs) of the various precooling systems used to improve the performance of gas turbine operational in Nigeria energy utility sector. The...
Open access
Research Article10.9734/jerr/2020/v15i417152
Remediation of crystal violet (CV) dye aqueous solution was attempted using acid activated raphia hookeri seeds (AARHS) as adsorbent. Adsorption equilibrium and kinetics of CV dye uptake onto AARHS were examined in series of experimental runs, and effects of contact time and init...
Open access
Research Article10.9734/jerr/2020/v15i417149
The paper focused on the improvement done in leadframe design to address the copper (Cu) burrs defect in assembly manufacturing. Newly qualified device struggled to hit the target yield due to the said Cu burrs defect. A holistic approach through why-why analysis was performed b...
Open access
Research Article10.9734/jerr/2020/v15i417150
This research was undertaken to determine the effects of corrosion on material performance using mild steel and Aluminum as selected material in seawater media. The result from the experiment showed higher corrosion rate in uncoated mild steel coupon as higher corrosion rate rang...
Open access
Research Article10.9734/jerr/2020/v15i317148