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:
According to its importance to save life and money, electrical power system networks must be protected to prevent any abnormal condition and to ensure the continuation of electrical power without any interruption to the healthy parts. Transformers are one of the most important parts of the power system and the researchers deal with developing the methods of protecting it to ensure secure operation. Protective relays are the most important part of the protection system. The relay does not prevent the incidence of faults. It can take action only after the fault has occurred. There are many types of relays depending on the strategy of detecting the fault and the part to be protected. In this research, a literature review for power transformer digital protection has been listed to present the development of the protection strategy for this part of the power system.
Activated carbon sourced biomass materials widely applied as the energy storage supercapacitors possess high porosity, large specific surface area, controllable surface morphology as well as low-cost. In addition, chemical activation agents are very significant in the process, which are adopted in the opening of active sites and pore structures of activated carbon. This study is aimed at combining a single-step activating process with the carbonization and activation, using KOH, NaOH, and ZnCl2 as agents in the preparation of carbon from low-cost reeds wastes. Furthermore, the resulting thermal stability, density of the electrodes, surface of morphology, microstructure, specific surface area and pore size distribution were investigated. The results show variation in surface area, where the largest was observed in KOH-activated carbon electrode at 1183.540 m² g-1, alongside high fibers density and low crystallinity properties. This was followed by the treatment with ZnCl2 and NaOH, showing 768.301 m² g-1 and 284.823 m² g-1, respectively. Subsequently, the symmetric supercapacitor cells produced with KOH-activated carbon electrode exhibited a high specific capacitance of 141 F g-1, and maximum energy density of 4.89 Wh kg-1, at the power density of 35.32 W kg-1
Reclamation land is the final step of the nickel mining activity that needs the land management and selection of a suitable plant. Reclamation land has soil characteristics to meet the sufficient conditions in adaption and selection of the plant. So that, it is important to establish the pattern of soil properties and plant growth to guarantee the sustainability function of post-mining land reclamation. This research was the field experiment by conducting determination and observation of the plant growth in reclaimed plant blocks. Plants were observed for sengon (Albizia chinensis), acacia (Acacia mangium), monkeypod tree (Albizia saman), and nedun tree (Pericopsis mooniana). Samples data were collected from 10 trees on each block and observed of height and circular of the trunk. Soil composite samples were collected for soil volume weight (SWG) analysis, soil texture, permeability, pH, C-Organic, and P content. The result showed that (1) the soil characteristic changed the pattern of plant growth in the reclamation area by indicating different variation between plants, (2) the soil characteristic was more affected by chemical than physical properties as shown by plant growth, and (3) sengon and monkeypod trees followed the pattern of changed soil characteristic, while acacia and nedun tree did not change. However, of the four plants mentioned, sengon had the best plant performances in the soil physical and chemical properties at the study site, it could grow and adapt well to nickel ex-mining land even with limited organic matter content. With the results that the contribution to future research on the existence of a selected plant with a low dose of organic matter, can be used as the basis for the management of land reclamation of nickel ex-mining.
This research aims to produce a valid and reliable Mathematics Assessment Instrument in the form of HOTS test question Based on Aceh Local Wisdom and to describe the quality of HOTS test question to measure higher order thinking skill of Grade VI elementary school students. This research was a research and development adapted from research development of formative research Tessmer type namely the preliminary and formation evaluation stage consist of self evaluation, prototyping (expert review, one-to-one, and small group), and field test. The subjects on one to one were 3 grade VI students of SDN Peunaga Cut Ujong West Aceh, the subjects in small group were 6 grade VI students of SDN Peunaga Cut Ujong West Aceh, and the subjects in the field test were 30 grade VI students of Peureumee West Aceh. The research results show that HOTS assessment instrument Aceh Local Wisdom Based in the form of test questions consisting of 15 essay question items from the material aspect, construction, and language is stated valid and feasible to be used. The instrument has reliability coefficient in the amount of 0,85%, the difficulty level average 0,42 (medium), and distinguishing power 0,31 (accepted without revision). From the field test, the average result of students’ HOTS Aceh Local Wisdom Based is 78,08 with medium category, there are 7 students (23,33%) owning medium HOTS, 20 students (66,67%) have high HOTS, and 3 students (10%) have extremely high HOTS
This article reports a special application of Renewable Energy (RE) in solar energy source and technology, tending to assist other researchers and technologists in extending its field of application in the aim of replacing RE- instead of hydrocarbon fuel energy which causes harmful effects on the environment and climate- changes. Using of RE as an excellent approach to mitigate climate change which needs this clean energy to meet energy demand for the future and saving the environment. .Interrelation between sustainable development and –RE- in practice is still limited in knowledge and application. RE technologies projects have been started to facilitate and increase the utilization of RE resources. Using solar energy in water pumping in our work will incorporate with other activities in the application. We used a water pump using direct solar energy to left water up to 1m, 10m, and 20m heads and to determine the flow rates in those cases. The experiment took place in Karbala –city. The results are found in the text
