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 aim of this study was to determine the BCF and the TF value of heavy metals in Oligochaeta. This study obtained data on heavy metal Cu and Cd pollution that affect soil quality and the potential of Oligochaeta L. terrestris and Pheretrima sp as bioremidiator for Cu and Cd in Jatibarang Landfill. The research method used is field experiment. Samples were then prepared for heavy metal analysis using the ICP MS. The BCF and TF value were calculated using formulas; the BCF value was calculated as the content of heavy metals in oligochaeta divided by the concentration of heavy metals in soil. This study measures and analyzes the concentration of two types of heavy metals, Cooper (Cu) and Cadmium (Cd) from 2 Oligochaeta species in Jatibarang Landfill Semarang Indonesia. The BCF value is the concentration ratio of heavy metals concentration in the organs of the esophagus or the dermis with heavy metals concentration in the soil) and the TF value is the ratio of heavy metals concentration in the dermis and esophagus) Cu on Lumbricus terrestris (3.596 ppm) is higher than Pheretrima sp (1,333 ppm), as well as Cd concentration in L. terestris (0.239 ppm) is higher than Pheretrima sp (0.079 ppm). Based on this research, the BCF and TF value for heavy metals in L. terrestris and Pheretrima sp were > 1 that means that those species are bioaccumulators. The results of the analysis of Cd in soil show the concentration of Cd in soil at site 5 exceeds the limit of the concentration of available metals. The TF values for Cu and Cd the dermis of Pheretrima sp were 0.663-2.072 and 0.185-1.668, and in the esophagus were 0-45.824 and 0-13.5 respectively. The TF values for Cu and Cd in the dermis of L. terestris were 0.103-12.568 and 0-0.598, and in the esophagus 0.355-16.758 and 0-1.307 respectively. The heavy metals from soil were absorbed, transported and accumulate in dermis and esophagus, therefore, L. terestris and Pheretrima sp are good bioremediator particularly Cu and Cd that can be apllied to remediate soil contamination with heavy metals
The mass, dimension, and size of a gearbox have strong effect on the gearbox cost. Consequently, in order to minimize the cost of a gearbox, the optimization of the partial gear ratios should be found. This study targets to find the optimum partial gear ration of two-stage bevel helical gearboxes base on the objective function of minimizing gearbox cost. Nine main process parameters are adopted to probe their influences on the output response. A plan of simulation experiment is conducted to serve for finding regression model. It is revealed that the total gearbox ratio parameter, ug, has strongest impact on the response u1 when compared to those of others. Besides, the predicted values given by regression model are significantly consisted to experiments