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Muhammad Yusuf Abduh,Mochamad Hirza Nadia,Syaripudin,Robert Manurung,Ramadhani Eka Putra 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.3
A systematic study on the use of Philippine tung (Reutealis trisperma) seed as a substrate for the cultivation of black soldier fly larvae (Hermetia illucens) was performed. The characteristics of Reutealis trisperma seed from two different locations: West Java and Papua, were determined. The seed has a relatively high oil (37.6–39.2%, dry weight) and protein content (14.9–28.2%, dry weight). The effect of cake content in the substrate (0–20%, wet weight), moisture content in the substrate (50–70%, wet weight), feeding rate (50–100 mg/larva/d), lighting condition (dark-light) and substrate depth in a rearing container (4–10 cm) was performed. An optimum prepupal biomass productivity of 123.4 g/m2/d was obtained (20%, wet weight of cake content in the substrate, 60%, wet weight of moisture content in the substrate, 100 mg/larva/d, dark, 6 cm substrate depth). The protein and oil content of the biomass were also determined to evaluate the effect of Reutealis trisperma seed as a substrate for the cultivation of black soldier fly larvae to produce protein and oil-rich biomass. The oil content in the biomass was also extracted and the fatty acid composition was identified. The prepupal biomass has a relatively high amount of protein (45%, dry weight) and oil content (26.6%, dry weight) and is suitable for cattle feed application.
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Simulation and experimental study on distortion of butt and T-joints using WELD PLANNER
Mohd Shahar Sulaiman,Yupiter HP Manurung,Esa Haruman,Mohammad Ridzwan Abdul Rahim,Mohd Ridhwan Redza,Robert Ngendang Ak. Lidam,Sunhaji Kiyai Abas,Ghalib Tham,Chan Yin Chau 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.10
This paper investigates the capability of linear thermal elastic numerical analysis to predict the welding distortion that occurs due to GMAW process. Distortion is considered as the major stumbling block that can adversely affect the dimensional accuracy and thus lead to expensive corrective work. Hence, forecast of distortion is crucially needed and ought to be determined in advance in order to minimize the negative effects, improve the quality of welded parts and finally to reduce the production costs. In this study, the welding deformation was simulated by using relatively new FEM software WELD PLANNER developed by ESI Group. This novel Welding Simulation Solution was employed to predict welding distortion induced in butt and T-joints with thickness of 4 mm. Low carbon steel material was used for the simulation and experimental study. A series of experiments using fully automated welding process were conducted for verification purpose to measure the distortion. By comparing between the simulation and experimental results, it was found out that this program code offered fast solution analysis time in estimating weld induced distortion within acceptable accuracy.
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