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Sainteks: Jurnal Sain dan Teknik
Published by Universitas Insan Cendekia Mandiri
ISSN : -     EISSN : 26858304     DOI : https://doi.org/10.37577/sainteks.v5i2
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering
Sainteks is a scientific journal that publishes research papers encompassing all aspects of natural sciences, technology and engineering. This journal is published 2 (two) times a year (March and September) by the Faculty of Engineering UICM d/h UNBAR. The fields covered by the Sainteks Journal include: - Chemical Engineering - Textile Chemical Technology - Industrial Engineering - Science - Textile Industry Technology - Environment
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 16 Documents
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Search results for , issue "Vol 6 No 2 (2024): September" : 16 Documents clear
Batch Scheduling Model For a Flow Shop Two Stage to Minimize Total Actual Flow Time Sudarman, Nisa Noviani
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.646

Abstract

This research concerns a batch scheduling problem with the process time used in the existing batch scheduling research can vary. One of the factors influencing processing time is machine deterioration and learning-forgetting process. The effect of the deterioration can results in a longer process time due to decreased machine capability, as well as an increase in service life or usage. The effect of the learning process can result in a faster product processing time due to an increase in operator experience in processing the product. Meanwhile, the effect of the forgetting process can result in slower product processing times due to the lag time between processing of the same product. This research proposes a batch scheduling model for a flow shop with a processing tow-item with considering of the deterioration process in Stage One and learning-forgetting process in Stage Two. The objectives is to minimize total actual flow time. The decision variables in this research are number of batch (?), batch size (Qi), and batch processing sequence. The problem-solving method was developed by proposed heuristic algorithms.The proposed algorithm is consist of batching sub algorithm, and sequence sub algorithm. Numerical testing shows that the proposed algorithm is able to solve the problem of a batch scheduling for a flow shop to minimize total actual flow time and the solution obtained by the algorithm is a feasible solution.
Proposed Package Distribution Routes at PT. Pos Indonesia Mail Processing Center Bandung Martikasari, Arida Murti; Yulianto, Irwan
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.656

Abstract

Pos Indonesia is a delivery service provider company that has a central distribution center in theregion of West Java, which is the Mail Processing Center Bandung. MPC Bandung has a function to regulatethe distribution of packages according to the destination area. The company has a target to minimizetransportation costs when shipping goods. The delivery process carried out by MPC Bandung can bemodeled as the Vehicle Routing Problem (VRP). This research focuses on the efficiency of the distributionroutes of documents and packages to 12 destination post offices in the secondary West Java Region. Analysiswas conducted using two classical heuristic methods, Clarke and Wright Savings and Nearest Neighbor, withthe aim of obtaining a more optimal route in order to minimize transportation costs. Alternative 2, which isdesigned using the CAWSA method, was chosen to be the best alternative because it produces the shortestmileage output of 894.2 km per day with a savings of 54.11% on the existing route, which has a total mileageof 1,948.7 km. This alternative was chosen as a proposed route improvement for the company. Thetransportation cost efficiency was obtained at 50.94% from Rp. 115.546.200 for the existing route to Rp.56,686,500 for the selected route.
Evaluation of Lighting and Power Systems At State Vocational School 1 Kramatwatu Kautsar, Alif; Irwanto, Irwanto; Fatkhurrokhman, Mohammad
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.676

Abstract

Evaluation of the electrical installation of a building is something that needs to be done so that the quality of the electrical installation remains in good condition and reliability. This research aims to evaluate the lighting system. Energy needs are currently playing an increasingly important role in human life, one of which is the problem that arises in the use of energy consumption in the New Classroom Building (RKB) at SMK Negeri 1 Kramatwatu. This research aims to determine the value of energy requirements in the RKB building (IKE, kWh , kVA and Cost Tariff), the RKB building is a building that has 2 floors with a total of 12 classrooms, this building was established at the end of 2023, the RKB building has never had an Energy Audit which is useful for identifying inefficient energy use, this energy audit can reduce energy use in order to increase the level of efficiency. To find out the results with data that has been collected using manual calculations and lighting simulations using DIALux software version 12.1. This RKB building uses energy of 17,154kWh/day, 85,770kWh/week, 343,080kWh/month and 4,322,960kWh/year. 226,925VA/Day, 1,134,625VA/Week, 4,538.5VA/Month and 54,462VA/Year. and customer rates Rp. 19,061;/Day, Rp. 95,308;/week, Rp. 381,234;/Month and Rp. 4,574,808;/Year on consumption of lighting power loads and other power loads.
Implementation of the SAW and TOPSIS Methods as a Decision Support System in the Election of Outstanding TNI Members Niqotaini, Zatin; Vernanda, Dwi
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.695

Abstract

This research aims to apply the SAW and TOPSIS methods in the decision support system for the selection of outstanding members at the TNI Maritime Data Information Center. The selection of outstanding members is an important activity that aims to reward individual performance and improve the quality of human resources. In this study, the authors realize that the conventional method used in the selection of outstanding members requires significant time and cost. Therefore, the researcher seeks to apply the SAW and TOPSIS methods to achieve transparent, effective, and objective elections. Today's technological advances play an important role in various aspects of human life, including education, economics, business, and other organizations. Previous research has shown that the SAW and TOPSIS methods have given good results in the selection and ranking process. In this study, the author will use the SAW and TOPSIS methods to select outstanding members in the TNI Pusinformar. The results of previous studies showed that the SAW method had an accuracy of 45%, while the TOPSIS method had an accuracy of 60%. Therefore, this research is expected to contribute to improving the quality of TNI members and facilitating the process of selecting outstanding members. Decision support systems that use the SAW and TOPSIS methods can be an effective tool in selecting outstanding members based on predetermined criteria. It is hoped that the results of this study can provide more accurate and objective recommendations in the selection of outstanding members in the TNI Pusinformar.
Study of Measuring The Cover Factor of Woven Fabrics Using Image Processing Techniques Wijayono, Andrian; Murti, Wilda
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.709

Abstract

In this research, a method for measuring the cover factor of woven fabric using digital image processing techniques has been developed. The cover factor of woven fabric is measured by capturing a digital image of the fabric under examination using a digital microscope, converting the image into digital image information, storing this digital image information in digital memory, and performing digital image segmentation to determine the cover factor of the woven fabric. Cover factor measurements were conducted on seven samples of woven fabric with different densities. To validate the proposed method, the cover factor measurements obtained from image processing were compared with the theoretical cover factor obtained from the standard method. It was found that there was no significant difference between the results obtained from the conventional method and the proposed method (with a significance value of 0.95).
Knitting Fabric with Fractal Geometry: Fractal Theory Applied to Industry 4.0 Munandar, Taufik; Ihsan Ardiansyah, Muhammad; putra, valentinus galih vidia
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.772

Abstract

Knitted fabrics have complex and repetitive patterns, similar to fractal geometry, where fractal theory can be applied in industry 4.0 to optimize the design, production and analysis of complex and efficient textile structures.This study aims to reduce electromagnetic radiation using conductive knit fabrics patterned with fractal geometry and non-conductive knit fabrics with similar patterns. Tests included raw materials (yarn) and fabrics. The yarn was tested using FTIR and SEM, while the fabric was tested for anti-radiation reduction and aesthetics. Conductive yarns of stainless steel polyester filament were interlaced with acrylic yarn using the jacquard technique on a Stoll CMS 540 HP automatic flat knitting machine. The results showed that the conductive knit fabric patterned with fractal geometry was better at absorbing electromagnetic radiation than the non-conductive knit fabric. The radiation test was conducted with sources from smartphones and computer screens at a distance of 10 cm, 20 cm, and 30 cm, while the aesthetic test was conducted using a questionnaire. The novelty of this research lies in the application of fractal geometry motifs, which enhance the protective and aesthetic functions of the fabric, resulting in a functional textile with high visual appeal.
Preliminary study of chitin extraction from crickets (acheta domesticus) using deep eutectic solvent Nur Fadila, Salsabil Intan; Athirah, Febriana Azhar; Perdani, Meka Saima; Pambudi, Teguh; Umam, Hilman Imadul
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.774

Abstract

Pada penelitian ini telah dilakukan ekstraksi kitin dari Jangkrik Rumah (Acheta Domesticus) melalui green process menggunakan Deep Eutectic Solvent (DES). DES yang digunakan dibuat dari komposisi Choline Chloride:Citric Acid Monohydrate dengan perbandingan molar 1:2. Proses ekstraksi dilakukan dengan variasi waktu (2, 4, dan 6 jam) dan perbandingan bahan baku dengan pelarut (1:10, 1:15 dan 1:20). Jangkrik rumah memiliki kandungan protein sebesar 20–40%, lemak sebesar 25%, mineral seperti kalsium dan juga kitin. Penelitian ini mengeksplorasi potensi jangkrik rumah untuk menjadi bahan baku kitin. Tujuan dari penelitian ini adalah mengetahui pengaruh perbandingan bahan baku dengan jumlah pelarut dan waktu ekstraksi terhadap nilai rendemen dan derajat asetilasi serangga jangkrik rumah. Hasil penelitian ini menunjukkan kandungan rendemen kitin pada sembilan sampel sekitar 45% hingga 94% dan DA pada bilangan gelombang 1560 cm-1 dan 2875 cm-1 sekitar 68.17% hingga 957.70%, hal ini dikarenakan masih terdapat sisa DES, protein yang ditunjukkan pada FTIR pita gelombang 1540 cm−1 dan kandungan mineral yang ditunjukkan pada peregangan O-H dan NH di pita 3450 cm-1 dan 3270 cm-1 sampel kitin. Pengaruh perbandingan bahan baku dengan pelarut dan waktu ekstraksi juga dapat mempengaruhi nilai DA dan rendemen. Namun hasil optimum DA yang diambil pada bilangan gelombang 1560 cm-1 dan 2875 cm-1 yaitu pada sampel JRC 215 sebesar 68.17% dan rendemen kitin pada sampel JRC 410 dengan presentase rendemen 45.50%.
Financial Feasibility Analysis of Copper Cathode Factory at PT. X in Central Kalimantan Bahri, Saeful; Oetomo, Dedy Setyo; Hermawan, Asep
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.778

Abstract

Indonesia has a lot of promising mineral wealth, one of which is copper, but its processing into cathodes is still minimal while domestic demand is not yet sufficient. In accordance with the strategic downstream investment plan for mineral commodities, especially copper, which has been included in the state downstream document, it requires a comprehensive financial feasibility document, especially for PT. X. The analysis in this research uses a reference capacity of 25,000 tons of cathode. This research aims to determine the technical factors in building a copper cathode factory, determine the amount of investment required in the form of CAPEX and OPEX, and determine its financial feasibility. The method used in financial feasibility analysis at PT. This X is Net Present Value (NPV), Internal Rate of Return (IRR), and Payback Period (PP). Based on the research results, it was found that the total CAPEX (Capital Expenditure) costs that had to be incurred were $ 330,589,628 and the total OPEX (Operational Expenditure) costs that had to be spent was $ 312,257,456 with an NPV value of $ 27,505,439, an IRR value of $ 27,505,439. 15.1%, and PP value for 6 years 10 months. Therefore, the project to build a copper cathode factory at PT. X is worth continuing.
Strategies for Improving Occupational Safety in the ATBM Weaving Industry Rahmawati, Nurmalinda; Heikal, Jerry
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.780

Abstract

Occupational safety is a crucial aspect of the manufacturing industry, especially in the weaving industry that uses shuttle machines. This study aims to identify risks and develop strategies to prevent occupational accidents in the shuttle weaving industry. The methods used include job safety analysis (JSA) and strategy formation using the IFAS and EFAS matrix to formulate the necessary solutions. The results revealed that seven types of jobs were identified as having 23 potential risks of occupational accidents. The highest risk was found in the shuttle weaving process, where the activities involved have the potential to cause physical injuries such as permanent disability due to being targeted by the weft binoculars during production. The proposed strategies include improving weaknesses by capitalising on existing strengths, implementing new technologies and safety policies to address threats, and improving compliance and incident response to reduce risks. This research is expected to contribute as a reference for the weaving industry with shuttle machines in conducting risk analysis and implementing occupational accident prevention measures.
Martin Fishbein's Multiattribute Analysis on Using The Pegadaian Digital Service PT Pegadaian Indonesian Pawnshop Avrianto, Alam; Murwenie, Ira
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.783

Abstract

The objective of this investigation is to assess the level of client trust and the attitude of PT. Pegadaian Indonesia toward the Pegadaian Digital Services (PDS) Application. The PDS Application is an internet-based pawn service application that was launched by PT. Pegadaian Indonesia in 2021. This study is a quantitative research study that aims to gather data from a specific group of clients of PT. Pegadaian Indonesia KCU Gegerkalong - Bandung. The data collection will be done using deliberate random sampling procedures. The analytical methodology utilized is the Martin Fishbein multi-attribute analysis model, implemented through the utilization of Ms Excel software version 13. The findings of this research will be advantageous in assessing the degree of perception and level of confidence that consumers of PT. Pegadaian Indonesia have in the utilization of the PDS Application. This application has been offered by PT. Pegadaian Indonesia to facilitate its online gold collateral and loan services.

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