How to control chaos in the economic system has aroused the interest of researchers. We research the chaos control in a new Resource-Economic-Pollution system by time-delayed feedback control. By determining the appropriate range of time delay τ and feedback strength k, the chaot...
Open access
Research Article10.9734/jerr/2019/v7i416974
A simple, portable and effective design for enclosing portable generators to reduce the radiated noise has remained a daunting challenge to noise control advocates in many developing countries. This research aims to use an adaptive design approach to create an enclosure for minim...
Open access
Research Article10.9734/jerr/2019/v7i316972
The strength and hydraulic properties of lateritic soils stabilized with bagasse ash (BA) and rice husk ash (RHA) were examined in this study. The three lateritic soil samples used in the study were obtained from a borrow pit near the main waste dumpsite in Ado Ekiti, Nigeria. Th...
Open access
Research Article10.9734/jerr/2019/v7i316973
Heart acoustics can be used as an early diagnostic tool, to quickly and accurately identify medical patients who may be at risk of unfavourable cardiovascular outcomes. However, at present, there remains no universally accepted standard or technique for detecting abnormalities us...
Open access
Research Article10.9734/jerr/2019/v7i316971
This technical paper presents a study of wirebond selection highlighting the package electrical modeling and simulation done for semiconductor integrated circuit (IC) leadframe package (hereinafter referred to as Device Z) with different wirebond configurations: Gold 2N 1.3 mil,...
Open access
Research Article10.9734/jerr/2019/v7i316970
A set of analytical equations are developed for calculating the beam-column assemblage flexure action capacity and compression arching action capacity under a middle column removal scenario. The suggested equations covered most of the main parameters affecting the assemblage beha...
Open access
Research Article10.9734/jerr/2019/v7i316969
The assessment of safety hazards is fundamental to an effective risk management in any industry. Food and beverage production involves a variety of industrial processes with associated hazards. Effective safety practices are used to reduce workplace hazards and promote safety in...
Open access
Research Article10.9734/jerr/2019/v7i216967
Automotive engine faces stringent regulations on emission with improved fuel consumption. As such, the Gasoline Direct Injection (GDI) engines which have the potential to meet these requirements are being improved on especially the mixture formation to the burning of the mixture....
Open access
Research Article10.9734/jerr/2019/v7i216968
The financial cost of downtime can be very significant, especially in manufacturing industries. As a result, no business wants to experience downtime. In this study, the reliability of two identical machines code named GDA and GDB used in a cement manufacturing industry was asses...
Open access
Research Article10.9734/jerr/2019/v7i216965
Leadframe-based packages are commonly used for semiconductor power devices. With these packages, heat dissipation is much better compared with laminate substrated-based packages. However, the solder joint reliability requirement under thermal cycling condition is also higher and...
Open access
Research Article10.9734/jerr/2019/v7i216966
This paper presents the submodeling approach in thermo-mechanical simulation of the die passivation crack encountered in a power leadframe package subjected to temperature cycling condition. Without using modeling and simulation in resolving semiconductor package development iss...
Open access
Research Article10.9734/jerr/2019/v7i216964
The temperature increase causes a heating of the line conductors which is at the origin of the tension drops and the losses joule increases in line which cause a dilation of the line conductors. In this paper, we investigate of the ambient temperature influence on some quantities...
Open access
Research Article10.9734/jerr/2019/v7i116963
Semiconductor packages using solder balls as interconnect to the printed circuit board (PCB) are very popular especially in mobile products like smart phones. Recent requirement to make the package much thinner is very challenging. The solder ball collapse height after the solder...
Open access
Research Article10.9734/jerr/2019/v7i116962
A study of the prevailing management of municipal solid waste (MSW) generated in Ado Ekiti, a city in the southwest of Nigeria was undertaken using desk and field studies. The composition of the MSW derived from on-site waste sampling comprised plastics (28%), food (26%), paper/c...
Open access
Research Article10.9734/jerr/2019/v7i116961
Irrigation is of major importance in many countries. It is important in terms of agricultural production and food supply, the incomes of rural people, public investment for rural development, and often recurrent public expenditures for the agricultural sector. Nigeria’s irrigatio...
Open access
Research Article10.9734/jerr/2019/v7i116960