Technology Reports of Kansai University (ISSN: 04532198) is a monthly peer-reviewed and open-access international Journal. It was first built in 1959 and officially in 1975 till now by kansai university, japan. The journal covers all sort of engineering topic, mathematics and physics. Technology Reports of Kansai University (TRKU) was closed access journal until 2017. After that TRKU became open access journal. TRKU is a scopus indexed journal and directly run by faculty of engineering, kansai university.
Technology Reports of Kansai University (ISSN: 04532198) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are
in the following fields but not limited to:
Zhonghua er bi yan hou tou jing wai ke za zhi = Chinese journal of otorhinolaryngology head and neck surgery
Interventional Pulmonology (middletown, de.)
The limited availability of resources to meet day-to-day increase in power demand due to the limitations of conventional energy resources have become the concern of every nation. An unpleasant case is that of Nigeria where the power supply depends mainly on hydro, leading to inefficient power generation and distribution. In this research, a charge controller with Maximum Power Point Tracker (MPPT) for photovoltaic system was implemented using a micro controller PIC 16F8768 and a prototype was constructed with an output voltage of 24 volts for optimum energy transfer throughout a day. Proteus 8.0 software was used for the task. The average of each term; voltage, current and power outputs were taken along their efficiencies for both dry season and rainy season. The MPPT is responsible for extracting the maximum possible output from the photovoltaic and feeding it into the load via the boost converter which step up the voltage to the required level. The performance characteristics of the charge controller with MPPT and without MPPT of the different output voltages were measured. Both output voltage and currentwith the MPPT and without MPPT were compared in terms of time (dry season and rainy season) and total power was evaluated. By using Proteus 8.0 software, the charge controller with MPPT was also simulated. Result shows that the efficiency of power without MPPT was 58.7% whereas with MPPT was60.33%. The charge controller with MPPT gives 5.632 W maximum power at 3:05 pm. The charge controller with MPPT has better performance even though this advantage is at the expense of additional components that make up the tracking unit of the charge controller system. Therefore, it can be recommended where the availability of grid is very low. Another advantage of using charge controller circuit with MPPT is that it supports portable operations where necessarily
This research intends to investigate the rainfall erosivity index that has the highest correlation the surface run-off volume and the volume of erosional soil. In addition, this research aims to determine the most effective rainfall erosivity index due to the observation. The methodology consists of modeling by using rainfall simulator in the hydrology laboratory. Then, the linier regression analysis is used for formulating the model. The result shows that the rainfall intensity will influence the erosivity during the certain time with the determination coefficient: R2 = 0. 997.. Based on the variance analysis, the formulation of EI30 is EI30 = I0.2353 H1.4544 with the minimal average time is 30 minutes and the maximal one is 60 minutes will cause the run-off and land erosion