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:
Silica sand is sand that is used for molding processes. When a catalyst is added to it, it develops the bonding characteristics of the raisin, which binds the silica sand together. Its moisture content (17.24% initial and 0.5% final moisture content) is extremely critical sand additive that can be greatly impact casting quality. In this study flat plate solar collector was used because, it is the most important type of solar collector and it is simple in design, has no moving parts and requires little maintenance. The analysis of heat transfer coefficient (losses) through flat plate collector was discussed and the techniques that used to reduce these losses also mentioned (by using insulation). This paper presents performance evaluation of solar dryer for silica sand. In the dryer, the heated air from a separate solar collector is passed through a tray, and at the same time, vertical blackened wall of the drying chamber, which is exposed to solar radiation. The results obtained during the test period revealed that the temperatures, moisture removed, drying rate and drying efficiency through dying chamber were decreasing during its upraise path.
The purpose of this research is to apply the magnetic field induction method to determine the type of soil. This soil type information is used to assess the suitability of the land for cultivation. The method was applied by using two types of coils which is functioned as transmitters and receivers’ probes. The voltage response measured on the receiving coil is analyzed to differentiate between each type of soil. Some type of soils, have been used in this measurement, including laterite, sediment, humus, clay and volcanic soils. Based on measurements, all soils have successfully responded to the voltage on the receiving coil and can be distinguished from one another from the voltage value. Volcanic soils, which contain the largest element of aluminum, namely 45%, provide the largest electrical voltage response. Meanwhile, humus soil, which contains 1% aluminum, provides the smallest electrical voltage response.
Economic growth is a necessary condition in carrying out economic development. Growth is also the main measure of development success. This article aims to predict the effect of Tax DBH, Non-Tax DBH, and investment on economic growth moderated by regional spending in East Kalimantan. We use a quantitative study which is a statistical analysis so that it can be calculated through the MRA. To reveal the study objectives, time-series data for 13 periods were needed. We can conclude that only Non-Tax DBH has a significant effect on economic growth with and without the regional spending interaction. On the other hand, DBH Tax and investment have no real impact on economic growth (both directly and indirectly through the interaction of regional spending). Originality in this article can be seen from the novelty value expressed by the time lag, the object of study, the analysis model, and the empirical findings that are different from other studies.
— Loaf bread contains high carbohydrate and other nutrition; it is easily founded at the retail and supermarket. However, the shelf life of loaf bread is short enough, usually only for 3-4 days, thus there is lots of loaf bread wasted due to expiration. Efforts have been done to extend this shelf life in several ways; one of them was by adding oxygen-absorber active packaging. In this research, the oxygen absorber was prepared from ascorbic acid incorporated into silica. Ascorbic acid is recognized as safe compound for food and even this compound is already used for food additive. Thus, this research was aimed to determine the effect of ascorbic acid as an oxygen absorber to maintain the quality of loaf bread during storage. This research was started by calculating the rate of ascorbic acid absorbed into silica pores. This calculation results were then used as base on silica-ascorbic oxygen absorbers production. Determination of ascorbic acid sorption was began by determine the maximum wavelength of ascorbic acid absorbance. The calculation has been resulted on the highest absorption rate of 0.358 g ascorbic acid/g silica for 20 minutes of immersion. The calculation yielded an absorption rate constant of 0.388 g/g. This absorber was then packed into LDPE (Low Density Polyethylene) plastic, attached inside the package of bread and stored at room temperature (27 ± 2°C). The experiment showed that the oxygen absorber made from corporation of silica-ascorbic acid could maintain the quality of the bread until 7 days in all treatment.
Oreochromis niloticus is one of the freshwater aquaculture fish which has high economic value. Current cultivation of tilapia still facing the problem of disease that can reduce the quality of the production. One common type of fish disease in tilapia cultivation is parasites. Analysis of ectoparasites prevalence and intensity was conducted in biofloc system cultivation of tilapia fish in Sukabumi Regency, West Java, Indonesia. The results showed that the types of ectoparasites in tilapia cultivated with biofloc systems were Trichodina sp., Glossatella sp., Dactyrogylus sp., and Gyrodactylus sp. with a prevalence ranging from 10-60% and intensities ranging from 1-3 individuals/fish. This parasitic infection was categorized as infection often to very often with low intensity of infection. The fish gill is the major targeted organ by parasite infections. Understanding the prevalence and intensity of the parasites infection in tilapia cultivation may benefit the community to prepare future action in handling this matter.
