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 potentiality of Share clay as an ingredient for synthesis of metakaolin based geopolymer and the effect of partially substituting the clay with the cullet of cathode ray tube (CRT) was investigated. Calcined clay in partial substitution with powdered CRT in the mix proportion of 0%, 25%, 50% and 75% by weight was reacted with sodium hydroxide (NaOH) and sodium silicate (Na2SiO3). The resulting geopolymer samples were used to produce test specimens and the effect of different percentage addition of CRT on the physicomechanical properties were evaluated. The starting materials and the products were characterized using Scanning Electron Microscopy (SEM) to evaluate morphology, X-Ray Fluorescence (XRF) for oxides composition, X-Ray Diffractometer (XRD) for compositional phases, Atomic Absorption Spectroscopy (AAS) for elemental components and Fourier Transform Infra-Red microscopy (FTIR) for characteristic bonding. Results shows that the alumina and silica content of Share clay are 30% and 92% respectively while that of the CRT were 3% alumina and 29% silica. The water absorption of the geopolymer increases with increasing CRT addition. The Compressive strength in 24 hours ranged from 13 to 17 N/mm2. The drying shrinkage ranged from 0.5mm to 1.25 mm. CRT is as usable as other pozzolanic material to be used with kaolinite in the synthesis of geopolymer. This offers the opportunity for resource recovery from and beneficial use of CRT, which is considered a toxic e-waste.
Energy is an important part of basic needs. All living things on the earth need energy to survive. However, energy crisis and environmental damage due to pollution are becoming problems. That is the reason why the need for renewable energy is inevitable. There are many sources of renewable energy like wind energy and hydropower. Among several forms of renewable energy, energy from thermoelectricity is one of promising candidates because it does not generate noise and harmful gases. The thermoelectric materials convert waste heat into electricity based on Seebeck effect. This article describes a simple explanation about the introduction, theory and principle of thermoelectric devices. Several important parameters such as a figure of merit (ZT), thermal conductivity, electrical conductivity, Seebeck coefficient are related each other. This article also gives a brief calculation of several parameters of thermoelectric material and the results are shown in graphs so it will give better intuition for understanding thermoelectricity
The cranks are the propellant component of the transmission of a bicycle that converts the reciprocal movement of the cyclist's legs into the rotation movement. The objective of the article is to evaluate the characteristics of the part through FEA once the form optimization is applied. Initially the conditions to which it would be prone to fail are determined. With the optimization of shape, the connecting rod weight was reduced by 13% without affecting its mechanical properties
Spiral casings are a vital element in reaction turbines for hydraulic energy generation. This work analyses the behavior of many variables of spiral chambers in five families of models: Logarithmic, Fermat, Galileo, Archimedes, and Polynomial spirals. It also studies seven inlet diameters of the chamber. Each prototype was evaluated with standardized boundary conditions. Virtual models of chamber spirals were built from mathematical equations. The behavior of the fluid inside the models was evaluated using computational fluid dynamics. The simulations were performed in the module CFX of ANSYS®19.1, and a velocity profile of the dynamic behavior of the fluid inside each spiral chamber was obtained. Absolute, tangential and radial velocities of 50, 75 and 100 % of the flow area of the spiral chamber outlets were evaluated. Using a statistic study of velocity values at the outlet of the chamber calculated through CFD, the maximum average velocity and the minimum standard deviation were established. Additionally, optimal criteria for choosing the most appropriate chamber of each type were estimated. These models indicate that Archimedes spiral casings with inlet diameters of 100 and 150 mm present the best fluid-dynamic behavior
Research aimed to identify the characteristics of the owner of the handwriting, so that handwriting can be recognized and able to prevent forgery of handwriting through two methods, namely the inner product and cosine. The increased use of handwriting as a means for authentication and authorization from accessing an account or specific media, it takes a technological advancement in terms of security handwriting. Both method will be compared to the level of accuracy in recognizing the characteristic and the owner of the handwriting. Steps being taken to 100 consists of digitized handwritten documents, pre-processing such as color conversion and thresholding, and gridding stage, feature extraction, and pattern recognition through the inner product and cosine. From the test results which consists of 60 training data (in database) and 40 test data through methods cosine, 9 data misidentified, 10 unknown data, and 21 data has correctly identified the owner of the handwriting, so accuracy is obtained only by 52.5%.While testing with the same data through inner methods, produced 27 recognized correctly managed data, 13 data is not in accordance with the owner's handwriting, so accuracy is obtained from the inner product method amounted to 67.5%. Overall it can be concluded from this study, the use of methods of cosines and inner product in identifying the owner of the handwriting can produce fairly good accuracy, where accuracy inner product value is still higher than the cosine
