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:
The present research is concerned with studying experimentally the characteristics of flow over six different models of humps which are manufactured with a suitable scale and fitted to a laboratory flume. The hump models are placed at 70cm and 130cm from the upstream (us) of the flume inlet. Dimensional analysis is carried out to identify the parameters affecting the experimental work. The results showed that models 2, 3, and 6 retain water and the damming phenomenon is occurred at distance 70 cm and 130 cm from the upstream (u/s) of the flume; but models 5 is able to activated these actions at the distance of 130 cm only; while models 2 and 4 are unable. The results are also showed that Froude Number (Fr) indicates that the type of flow at the upstream (u/s) of the hump is subcritical and is supercritical in the downstream (d/s), while it also find that the flow is supercritical at the hump in the case of damming occurrence. The results showed that there is a difference in the height of the water between upstream and downstream of the flume by 200% to 350% at distance 70 cm while it is found that this difference by 172.72% to 337.5% at distance 130 cm
Waste cooking oil is one of the vegetable oils produced from the use of cooking oil continuously and is very dangerous if consumed again because it has exceeded the maximum level of quality of cooking oil, one way to utilize triglycerides contained in waste cooking oil is by transesterifying the waste cooking oil with methanol into biodiesel using heterogeneous catalysts. The purpose of this study was to determine the effect of adding the concentration of CaO/ZnO catalyst, mole ratio of waste cooking oil and methanol, and reaction time to the yield, and characteristics of biodiesel. The production of biodiesel was carried out by varying the concentration of CaO/ZnO catalysts by 0.5 %, 1 %, 1.5%, 2 %, and 2.5 % w/w oil, the mole ratio of oil with methanol 1 : 3, 1 : 6, 1 : 9, 1 : 12, and 1 : 15, reaction times of 2, 3, and 4 hours respectively. In this study, the best catalyst concentration was 1% w/w oil with the mole ratio of oil with methanol 1: 12, and reaction time of 4 hours with yield of 80.90 %, The results of the characteristics analysis of biodiesel obtained have met the SNI 7182: 2015 standard
This paper shows an optimization study on optimum determination of the cutting parameters and cutter helix angle when end milling of Al6061. In this study, the effects of the milling process parameters and tool geometry, including the cutting velocity, feed rate, radial depth of cut, and cutter helix angle. Moreover, in order to estimate the influences of these factors on the optimum cutting parameters and helix angle, a simulation experiment was designed and conducted by a computer program. A regression equation was proposed to calculate the optimum cutting speed, feed rate, radial depth of cut, and cutter helix angle.The Particle swarm optimization algorithm (PSO) was proposed to obtain the optimal parameters in consideration of the boundary conditions, which are determined from the empirical relationship of factors affecting the machining process
Education and mathematics competencies and skill have become the most central elements that impact on the development of any nation, particularly in science and technology. The fundamental importance of mathematics to humans could be explained in terms of the interrelationship between mathematics and the development of humans to advance the cause of humans. In this paper we report on a qualitative study which explored the mental constructions made by grade 12 learners (n = 30) when solving triangles in trigonometry. The study was carried out at a school in KwaZulu-Natal in South Africa. The data was collected from written responses of students to a structured activity sheet, consisting of questions on three dimensional problems. The data were analysed using APOS theory. Findings emanating from the data analysis informed a modification of the initial genetic decomposition, which raised some didactical implications for basic education, specifically for the learning and teaching of trigonometry
Staphylococcus aureus is one of a pathogenic bacteria with a high rate of resistance. The discovery of herbal plants that have the potential as an antibacterial is needed. Barleria prionitis is known to have the antibacterial activity of Staphylococcus aureus. The focus of this research is to determine the antibacterial effect of the ethyl hexane fraction of Barleria prionitis on Staphylococcus aureus in mice. This study used an experimental method in which mice treated by injection of Staphylococcus aureus and then given with NaCl (negative control group), Amoxicillin (positive control group) and ethyl hexane fraction Barleria prionitis at a concentration of 0.3 mg / kg; 0.6 mg / kg; 1.2 mg / kg; 233 mg / kg; 4.8 mg / kg (treatment group 1-5). The research found that the Barleria prionitis ethyl hexane fraction with a dose of 2.4 mg/kg and 4.8 mg/kg showed significant bacterial growth inhibition activity. But the ethyl hexane fraction of Barleria prionitis showed no significant antibacterial activity compared to Amoxicillin
