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:
Curcuma longa (turmeric) extract is known to have good and stable antioxidant properties. Therefore, this study aims to determine the antioxidant activity of the turmeric extract towards the inhibition of trans fatty acids formation in repeatedly heated cooking oil (RCO). This experimental research was conducted through several procedures, including maceration to obtain the turmeric extract, which was subsequently added to the RCO resulting from 1, 5, and 10 frying times. In addition, the extraction of oil absorbed in fried food was also performed, followed by contents analysis of trans fatty acids. The results showed the potential application of turmeric extract as an antioxidant, due to the high IC50 value of 12.38μg/mL, alongside 21.85% free radicals suppressing activity in cooking oils
For athletes who play adventure sports such as baseball, hockey, or in the military, they often use helmets that require high strength. Consequently, helmets are often designed with additional bearing frames. Conventional collisions come from the direct collision of the helmet's shell, transmitting force onto the load-bearing frame of the helmet then shifting force to the head of the helmet. Therefore, the bearing frame structure significantly plays a vital role in human safety. This paper investigates a simulation solution to minimize the impact on the head of a person when the helmet frame is impacted with a rigid object moving at high velocity. The metal frame structure is calculated to provide the best bearing capacity, combined with Foams/Styrofoam material to absorb energy. From that, we propose solutions to improve the structure and select the appropriate materials to minimize the impact on the head of the helmet when the collision occurs. In this study, the authors used finite element analysis (FEA) and performed on ABAQUS software
Increased population and urbanization is one of the changes in the use of the Wadaslintang Reservoir catchment area, this condition has the potential to cause pollution of some heavy metals that can accumulate in this aquatic biota. This study aims to determine the concentration and bioconcentration of Pb, Zn, Cu, and Cd heavy metals in Anodonta woodiana Lea (freshwater shellfish), Pomacea canaliculata Lamarck (golden apple snail), and Cherax quadricarinatus Von Martens (crayfish) in the Wadaslintang Reservoir. Samples of freshwater shellfish, snails, and crayfish were randomly collected in an area of + 100 m2 in three research stations at a depth of 0.0 - 0.5 m. Sampling was conducted in August - October 2018. The results showed that the three aquatic organisms contained heavy metals Cu, Cd, Pb, and Zn. The highest concentration is in A. woodiana, then P. canaliculata and the lowest concentration is in C. quadricarinatus. The results of the BCF value calculation showed the highest bioaccumulation values found in A. woodiana and P. canaliculata were Zn, which included in the category of moderate accumulation. Whereas in C. quadricarinatus the highest bioaccumulation value is Pb, but it is still included in the low accumulation category
This paper presents a novel non-invasive monitoring method, based on a Liénard-type model (LTM) to diagnose single and sequential leaks in liquid pipelines. The LTM describes the fluid behavior in a pipeline and is given only in terms of the flow rate. Our method was conceived to be applied in pipelines mono-instrumented with flowmeters or in conjunction with pressure sensors that are temporarily unavailable. The approach conception starts with the discretization of the LTM spatial domain into a prescribed number of sections. Such discretization is performed to obtain a lumped model capable of providing a solution (an internal flow rate) for every section. From this lumped model, a set of algebraic equations (known as residuals) are deduced as the difference between the internal discrete flows and the nominal flow (the mean of the flow rate calculated before the leak). Once the residuals are calculated a principal component analysis (PCA) is carried out to detect a leak occurrence. In the presence of a leak, the residual closest to zero will indicate the section where a leak is occurring. Some simulation-based tests in PipelineStudio® and experimental tests in a lab-pipeline illustrating the suitability of our method are shown at the end of this article
The purpose of this research is to determine the performance of mini cold storage with three rotational variation of diesel engine which are 650 RPM, 700 RPM and 750 RPM, temperature of mini cold storage room reached -20 ºC, initial product temperature 28ºC, the final temperature of the product is -5 ºC, the evaporator temperature is -29 ºC and the condenser temperature is 32 ºC to 34º C. The results shows that in the 650 RPM, the fuel consumption is 13,200 milliliters with a total operating time of 22 hours, for refrigeration capacity of 1,304 kW, refrigerant mass flow rate of 0,0085 kg/s, compressor capacity of 0,35 kW, condenser capacity of 1,65 kW with COP value of 3,75. Whereas in the 700 RPM of diesel engine the total fuel consumption is 10,400 milliliters with a total operating time of 16 hours, for refrigeration capacity of 1,74 kW, the mass flow rate of refrigerant is 0,011 kg/s, compressor capacity is 0,45 kW, condenser capacity of 2.19 kW with COP value of 3,85. Furthermore, in the 750 RPM of diesel engine, the total fuel consumption is 13,300 milliliters with a total operating time of 19 hours, for refrigeration capacity of 1,483 kW, the mass flow rate of refrigerants is 0,00980172 kg/s, compressor capacity is 0,405007 kW, condenser capacity is 1.89 kW with COP value of 3,6. it was concluded that the use of a 700 RPM diesel motor produces the highest COP value (3.85) with efficient and effective fuel consumption (10,400 milliliter)
