The paper focused on the improvement done in quad-flat no-leads (QFN) leadframe package assembly to address the quantity of rejection of crumpled leadframe during handling at wirebond process station. Overload sensor at the output magazine handler was found out to be defective, h...
Open access
Research Article10.9734/jerr/2020/v19i217226
Concrete is probably the most extensively used construction material in the world. The modern concept of construction is directed at the use of recycled materials, in particular, various waste products. This solves a number of problems -saving the expensive materials; - decreasin...
Open access
Research Article10.9734/jerr/2020/v19i217225
The paper is focused on the reliability performance of quad-flat no-leads (QFN) package evaluated on different die attach machine platforms. Reliability tests were done to check the difference in the quality and reliability performance of the device that undergone die attach proc...
Open access
Research Article10.9734/jerr/2020/v19i117224
The nailing method is utilized for temporary and permanent stabilization of the drilled excavations and walls. In most instances, nailing is much more cost-efficient than other excavation stabilization alternatives, hence the popularity and rapid development of nailing technology...
Open access
Research Article10.9734/jerr/2020/v19i117223
A 5 cell elliptical cavity prototype has been build to accelerate the 100 MeV high beam of protons [1]. For cavity = 0.61 β g at 650 MHz in which the cavity structure is optimized by using the code from SUPERFISH [2]. The Q value of the cavity measured is 0.61x109 for 4.2 K. In t...
Open access
Research Article10.9734/jerr/2020/v19i117221
The perturbation in members worship attendance data with respect to service duration and a general impression among members, that worship attendance recorded at sessional services, was due to the worship duration, gave rise to this investigative research. There has never been a s...
Open access
Research Article10.9734/jerr/2020/v19i117220
This study aims to provide a comprehensive review of all hydraulic fracture geometry modeling techniques available in the conventional and unconventional reservoirs. We are introducing a comparison study between major available hydraulic fracture modeling techniques, advantages,...
Open access
Research Article10.9734/jerr/2020/v19i117219
This study was undertaken to evaluate the effect of field practice on the tensile properties of pineapple leaf fibre (PAFL). The pineapple leaves were treated in the field with calcium nitrate (Ca(NO3)2) at four concentrations (0 mg/l, 100 mg/l, 200 mg/l and 300 mg/l). All the tr...
Open access
Research Article10.9734/jerr/2020/v18i417218
Prognostics is a term that engineering borrowed from medicine to refer to the discipline concerned with the Remaining Useful Life (RUL) of an engineering device. This paper surveys the RUL prediction techniques and classifies them into four categories of model-based techniques, k...
Open access
Research Article10.9734/jerr/2020/v18i417215
Surface waters are generally turbid because they contain suspended matter, organic matter, chemical and physical or even biological elements that make these waters unfit for drip irrigation. The almond powder of Moringa oleifera that was used in the study was dried in an oven for...
Open access
Research Article10.9734/jerr/2020/v18i417214
Past two decades, the usage of ceramic tools has increased especially in milling and turning process. These advanced ceramic tools have good characteristics that are capable in maintaining high hardness in temperatures and also wears much slower when compared to carbide tools. Wi...
Open access
Research Article10.9734/jerr/2020/v18i417212
In this paper, the reliability of axial compressors of gas turbines used in oil and gas installations was analyzed by the application of the two-parameter Weibull distribution method. Reliability analysis is an important tool to minimize the failures of equipment, shorten repair...
Open access
Research Article10.9734/jerr/2020/v18i417213
The reinvigorated approach by stakeholders towards Farm Mechanization has given birth to emerging fears in the existing relationship between mechanized agriculture and traditional land occupancy systems in Nigeria. The increased importation of agricultural machines into the count...
Open access
Research Article10.9734/jerr/2020/v18i317211
Financial instruments are one of the tools for increasing financing to fund construction projects. Stakeholders in the Nigerian construction industry face challenges such as profitability, delays, funding problems and contractor’s insolvency. A thorough knowledge of the financial...
Open access
Research Article10.9734/jerr/2020/v18i317210
An Irish potato peeling machine was developed for use at small-scale/household level. Machine performance evaluation was carried out using three locally grown Irish potato varieties namely; Nicola, Bartita and Bawondoya respectively. A 22x3 factorial experiment in completely rand...
Open access
Research Article10.9734/jerr/2020/v18i317209