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:
Heart sound is the sound produced from the mechanical activity of the heart. Some researchers say the sound of the heart occurs from the opening and closing of the heart valve; some researchers say it occurs due to the eddy flow of blood in the heart chamber. Heart in a healthy condition produces certain heart sounds, while an unhealthy heart produces different heart sounds. Various studies have tried to develop a method for classifying heart sounds using digital signal processing methods. The proposed method generally consists of the feature extraction method and classifier. In this study, continuous wavelet transforms and residual neural network (ResNet-50) were used to classify normal and abnormal heart sounds. The lowest error-rate of 0.066 was achieved using 130x130 features. This result was quite competitive compared to previous research. The proposed method is ready to be tested on a dataset with more heart sounds abnormalities
Drinking water distribution networks distribute a water-air mixture through the pipes given the inherent conditions of fluid conduction. These air bubbles are measured by the volumetric meters that are used to bill water consumption. Inaccurate measurements are detrimental for both the client and the supplier. However, there are non-return valves that have the ability to reduce the size of air bubbles traveling through the water lines to improve the accuracy of these meter readings. In this investigation, a CFD simulation of the behavior of the pressure and the volumetric fraction of the biphasic water-air flow was performed to estimate the performance of these devices based on the monitoring of these two variables. It was observed that the non-return valve operating with a water-air ratio of 90/10 respectively and at an average flow rate of 1.35 m/s in the pipeline, the size of the air bubbles and their volumetric fraction is reduced from concentrations from 80% to 45%. The results of the pressure drop of the non-return valve suggest that for the stem equilibrium position it produces a pressure drop of 9 PSI in the two-phase water-air flow stream