Archive of

Advanced Engineering Science

Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-24-02-2023-532

Abstract : The study investigates the cyclic behaviour of steel fibre reinforced rubberized concrete beams. The variables considered in this research study were different replacement levels of coarse aggregate with sand coated rubber shreds (2.5%,5% and 7.5%) and steel fibre volume fraction(0.5% and 1.0%).A total of seven beams were cast and tested under cyclic loading in a standard loading frame of 500kN capacity. The test results showed that RC beams with inclusion of steel fibres and sand coated rubber shreds exhibit improved cyclic performance in terms of number of cycles sustained and energy absorption capacity..
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-22-02-2023-531

Abstract : Muna Regency is an area that has been designated as one of the Bali cattle development areas in Southeast Sulawesi. Bali cattle in Muna Regency in recent years have continued to experience an increase in population but this has not been followed by maximum body weight gain. This study aims to analyze soil nutrient content, natural grass nutrition, and its relationship with the body weight gain of Bali cattle in the Muna District. The study used a survey method by taking soil and natural grass samples at each sampling point in 12 study areas. The samples were then analyzed in the laboratory of soil science and feed nutrition at Halu Oleo University, Southeast Sulawesi. The results of the study found that from the 12 study areas, soil nutrients were in the neutral to the slightly alkaline range, which caused natural grasses not to have enough nutrients to grow optimally, while for natural grasses, the highest protein was in the Parigi region, which reached 3.94% and certainly had a relationship with body weight gain because most of the natural grass, which is a source of feed, contains low non-protein nitrogen (NPN). The study concluded that the body weight gain of Bali cattle in Muna Regency did not experience a significant increase due to a lack of non-protein nitrogen (NPN) found in natural grass and possibly due to low soil nutrients..
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-21-02-2023-530

Abstract : Informal markets are a phenomenon that spreads in all countries of the world, especially in developing countries where there are fewer job opportunities and high levels of unemployment, poverty, and illiteracy. Some of these countries have been able to organize those types of activities and define general frameworks for dealing and benefiting from them. Others, the randomness still controls the methods and the ways to deal with them, as happens in the local situation in Egypt. This research aims to understand the dynamics of these informal markets, their typology, spatial patterns, and characteristics, and the most important factors affecting these patterns. In order to aid decision-makers, urban designers, and planners alike in proposing and developing realistic and appropriate methods to avoid (current and future) problems when conducting planning and development processes..
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-19-02-2023-529

Abstract : Indonesian leaffish (Pristolepis grootii) is one of Indonesia's endemic fish species that has the potential to be cultivated. The unavailability of quality seeds is a main obstacle in P. grooti farming. This study aimed to induce gonadal maturation of P. grootii. A total of 95 females (100.81 ± 0.78 g), reared in 15 aquaria (n=9), fed with a commercial pellet, and injected twice on the 7th and 14th day.with PMSG 10 IU.kg-1 of BW (T1), PMSG 10 + LHRHa 50 g.kg-1 of BW (T2), PMSG 20 (T3), PMSG 20 + LHRHa 50 (T4), and control (T5). Blood samples were collected from the caudal vein at 0, 30, and 60 days post-injection. The results showed that P grootii injected with a combination PMSG 20 + LHRHa 50 had the highest estradiol 17β (905.46±83.09 ρg.ml-1), total cholesterol (383.78±40.57 mg.dL-1), GSI (1.68±0.12 %), fecundity (2,946±174.72 egg.fish-1), and oocyte diameter (922.64±11.54 µm). The combination of PMSG 20 IU.kg-1 of BW + LHRHa 50 g. kg-1 of BW was the best treatment for gonadal maturation of P. grootii..
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Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-15-02-2023-527

Abstract : In current study, Finite Element Analysis (FEA) using ABAQUS software was performed to evaluate the behaviour of RC (Reinforced Concrete) beams. The current study concentrates on behaviour of beams at elevated temperature. Concrete is an important material used in construction field. In the current study, another alternative material is introduced for preparing concrete. Electric Arc furnace Slag (EAFS) is used for preparing concrete by partially replacing conventional coarse aggregate (CCA). The replacement of CCA using EAFS improves the material property of concrete and also the performance of the modified concrete which gives better results compared with concrete with CCA. The results of numerical study consist of load-deflection and stress-strain relation for both the type of concretes. Final result shows the inelastic non-linear behaviour of concrete. The current analysis mainly concentrates on the beams tested at three temperature levels of normal, 500 and 800°C of both conventional and modified concrete. The comparative study shows that EAFS concrete behaves almost the same as conventional concrete at normal and elevated temperature..
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