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All Journal Jurnal MEKANIKAL INTEK: Jurnal Penelitian Jurnal Teknik Mesin Sinergi
Yan Kondo
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Computer Science & IT Energy Engineering Mechanical Engineering

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ANALISIS INVESTASI PADA INDUSTRI PENGECORAN PROPELLER KAPAL (STUDI KASUS : CV. ANTERO JAYA SAKTI) Kondo, Yan; Siahaya, Yusuf; Leonard, Johannes
Jurnal MEKANIKAL Vol 3, No 1 (2012)
Publisher : Jurnal MEKANIKAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (369.021 KB)

Abstract

This study aims to determine the amount of investment of a particular industry on a ship propeller foundry industry CV. Antero Jaya Sakti and production costs and selling prices for each product made ​​propeller. The research was conducted by collecting data on production and equipment of CV. Antero Jaya Sakti, as well as making observations on the propeller shops of Makassar, needs to know the number and type of propeller is required. In addition, calculation and data analysis to determine the total investment and total production costs and payback period is desired. The results showed that the investment needed to run the ship propeller foundry industry in CV. Antero Jaya Sakti is $ 28,139.69  with a payback period of 3.2  years, cost of production required is $ 7.2 and selling price for a propeller that is produced is $ 9.77. The results could give the assumption that the investment in the propeller foundry industry can be considered feasible.
Pengaruh Larutan Natrium Hidroksida Terhadap Kekuatan Komposit Serat Sabut Kelapa Yan Kondo; Muhammad Arsyad; Muhammad Rusdi; Ilyas Mansur; Muhammad Jufri Dullah
Jurnal Teknik Mesin Sinergi Vol 20, No 1 (2022): April 2022
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (707.89 KB) | DOI: 10.31963/sinergi.v20i1.3467

Abstract

Abstract: The purpose of this study was to determine the effect of soaking coconut fiber in sodium hydroxide solution on the strength of the coconut fiber composite. This research was divided into several stages, namely: preparation of materials and tools, the process of soaking coconut fiber, making coconut fiber composites, testing the tensile and flexural properties of coconut fiber composites, and analyzing the test results. Coconut fiber is soaked in sodium hydroxide solution, then dried in an oven, then used as a composite reinforcement using BQTN 157 polyester resin with a composition of 5% coconut fiber. Based on the results of the tensile test according to the ASTM D638-03 standard, and the flexural according to the ASTM D790 standard, it was concluded that the process of soaking coco fiber in sodium hydroxide solution of 5%, 10%, 15%, and 20% had not been able to increase the strength of the coco fiber composite with composition of 5% coconut coir fiber compared to the strength of the resin.
Analisis Kandungan Lignin, Sellulosa, dan Hemisellulosa Serat Sabut Kelapa Akibat Perlakuan Alkali Kondo, Yan; Arsyad, Muhammad
INTEK: Jurnal Penelitian Vol 5 No 2 (2018): Oktober 2018
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.95 KB) | DOI: 10.31963/intek.v5i2.578

Abstract

The long-term goal of this research is to makecoconut fiber composite as one of the technical material, forbuilding material such as ceiling board or for automotivematerial such as bumper. While the specific target to be achievedin this research is to determine the influence of the concentrationof alkali solution on soaking coconut fiber to the content of lignin,cellulose, and hemicelluloses of coconut fiber. To achieve theobjectives and targets, the method of implementation of thisresearch is divided into 4 (four) steps, namely (1) preparation, (2)immersion, (3) testing, and (4) analysis. Coconut fiber is treatedby soaking coco fiber for 3 hours in sodium hydroxide (alkali)solution with concentrations of 5%, 10%, 15%, 20%, 25%, 30%,35%, 40%, 45%, 50%, and 55%. Once soaked, the coconut fiberis rinsed with aqua, then dried in an oven at 60°C for 4 hours.After that, a composition test with hydrolysis method todetermine the content of lignin, cellulose, and hemicelluloses.Each variable will be tested 3 (three) times. The data obtainedwill be analyzed statistically by applying descriptive method,where all data obtained will be presented in table, graphic, orimage form. Based on the tables, graphs, and images will beanalyzed and drawn conclusions. The results to be achieved inthis study is to determine the content of lignin, cellulose, andhemicelluloses coconut fiber due to alkali treatment for 3 hourswith a variable concentration of alkali solution. Based on theresults and discussion it can be concluded that soaking coconutfiber in alkaline solution degrades the content of hemicelluloses,cellulose and lignin.
Co-Authors Ilyas Mansur Johannes Leonard Muhammad Arsyad Muhammad Arsyad Muhammad Jufri Dullah Muhammad Rusdi Yusuf Siahaya