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Jurnal Sains dan Teknologi
Published by Universitas Cenderawasih
ISSN : 29620236     EISSN : 2961936X     DOI : 10.58169
Core Subject : Engineering,
Electrical & Electronics Engineering
pada bidang Teknik Industri, Teknik Pertambangan, Teknik Lingkungan, Sistem Informasi, Sains dan Teknologi, Pendidikan serta Kejuruan dan Rekayasa
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 79 Documents
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Analisis Postur Kerja Menggunakan Metode Rapid Entire Body Assessment (REBA) Dengan Inovasi Meja Penjemuran Kerupuk di UMKM Kerupuk Subur Rangga Sidiq Permana; Triyana Triyana; Fahmi Husaeni; Irfan Bukhori; Khotibul Umam; Andung Jati Nugroho
Jurnal Sains dan Teknologi Vol. 3 No. 2 (2024): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v3i2.658

Abstract

In the cracker production process at UMKM Kerupuk Subur, the process of drying crackers involves human labor so there is a risk of injury because when drying crackers, workers have to bend and squat. This study aims to determine the occupational dangers of workers during the drying process of crackers in UMKM Kerupuk Subur and provide recommendations for improvement. The method used to analyze body posture is Rapid Entire Body Assessment (REBA) then for improvement recommendations using an anthropometric approach with percentile calculations to determine dimensions as parameters for designing the work aids needed in the form of an ergonomic drying table. The results of REBA's analysis show a score of 9 with a high or high level, meaning there is a high risk of injury so immediate improvement is needed. The results of the design of an ergonomic drying table were then simulated through Inventor software which described the position of the worker's posture when carrying out cracker drying activities with a perpendicular working position. The results of the assessment of the working posture of the worker after the improvement showed a decrease in the risk level from medium to low and negligible.
Pembuatan Alat Peraga Sistem Kerja Lampu Rem Belakang Sepeda Motor sebagai Media Pembelajaran Jurusan Teknik Sepeda Motor Kelas XI di SMK Negeri 1 Nisam Fatimah Zuhra; Abubakar Abubakar; Islami Fatwa
Jurnal Sains dan Teknologi Vol. 3 No. 2 (2024): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v3i2.659

Abstract

The learning process can proceed well if aided by the presence of teaching aids.Because the teaching aid for the electrical system of the motorcycle rear brake light was not available, this teaching aid was created.The purpose of this research is to determine: (1) the method of creating a teaching aid for the rear motorcycle brake light system, (2) the feasibility level of the teaching aid for the rear motorcycle brake light system, and (3) the students' response to the teaching aid for the rear motorcycle brake light system.This research uses a development research approach, also known as Research and Development (R&D). The Research and Development (R&D) method is a research method used to produce a specific product and test its effectiveness. This research will be conducted at SMK Negeri 1 Nisam. The implementation will be carried out in the even semester of the 2024/2025 academic year. This research and development uses 3 methods in data collection. The methods used are observation, questionnaires, and documentation. The data analysis technique used in this research is descriptive analysis, which presents the results of product development in the form of learning media, testing the validity and suitability of the product for implementation in the electrical system of motorcycle rear brake lights.The results of the research on the development of teaching media props, which have gone through several stages such as potential issues, data collection, product design, product validation, design revision, product testing, until it became a teaching media prop for the electrical system of the motorcycle brake light. The results obtained from the material expert validation were 91.31% by validator 1 and 95.13% by validator 2. The media expert validation results were 97.91% by validator 1 and 97.91% by validator 2. The results of the students' responses to the teaching aids, after calculations, showed a total response score of 506 out of 572 overall. With a final score percentage of 88.46% and the qualification of the developed teaching aids' response being in the "Very Good" category.
Optimalisasi Proses Produksi di Balerina Fashion melalui Penerapan Lean Manufacturing dengan Metode VSM dan PAM Eko Wirawan; Fithriya Nur Hana; Bayu Febriyanto; Purwanti Purwanti; Rizky Eka Saputra; Ari Zaqi Al-Faritsy
Jurnal Sains dan Teknologi Vol. 3 No. 2 (2024): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v3i2.666

Abstract

Balerina Fashion faces the problem of waste in production process activities, which is caused by errors in pattern cutting, repetitive activities between production stages, and double work in the Quality Control (QC) division. This study aims to improve the efficiency of the production process by reducing waste using the Lean Manufacturing approach through the Value Stream Mapping (VSM) and Process Activity Mapping (PAM) methods. The results showed a significant increase in Value Adding (VA) time, from 56.00% to 84.88%. In contrast, Non-Value Adding (NVA) time decreased dramatically from 35.74% to 3.33%, while Necessary Non-Value Adding (NNVA) time increased slightly from 8.25% to 11.79%. These changes reflect productivity improvements and an increased focus on activities that provide direct value to customers. As a recommendation, the development of a new Standard Operating Procedure (SOP) is suggested to ensure each process runs according to standard. This SOP includes a detailed step-by-step guide for operators and QC, which was previously unavailable.
Penilaian Kinerja Operasi dan Pemeliharaan Bendungan Keuliling dengan Pendekatan Indeks Kondisi Marini Bravikawati; Amalia Harmin
Jurnal Sains dan Teknologi Vol. 3 No. 2 (2024): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v3i2.667

Abstract

The Keuliling Dam has an important role in meeting water supply needs in the surrounding area. After operating for more than 10 years, an evaluation of operation and maintenance performance is required to ensure its continued function. This research aims to analyze the condition of the Keuliling Dam through assessing the condition index for each dam component based on primary and secondary data. The assessment is carried out by providing a condition index value that reflects the level of damage to the safety aspects and environmental performance of the dam. The results of the analysis show that the condition index value for the Keuliling Dam is 4, which is included in the minor damage category. This condition indicates the need for maintenance action to prevent further damage. Based on observations, deposition of material and rubbish is one of the main problems that affects dam performance. This research provides an important basis for managers in determining strategic steps to improve the performance of dam operations and maintenance. The evaluation carried out aims to ensure that the Keuliling Dam can continue to function optimally, support water supply, and minimize the risk of more serious damage. It is hoped that the recommendations from this research can become a reference in managing dams effectively and efficiently.
Perancangan Alat Talent Identification Aspek Quickness Berbasis IOT Abdul Manan; Dery Rimasa; Hikmat Kodrat
Jurnal Sains dan Teknologi Vol. 3 No. 2 (2024): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v3i2.670

Abstract

The sport of fencing is centered on skill tactics like cutting, stabbing, or using hand agility to parry an opponent's sword. In fencing, athletes must have strong reflexes and focus in order to both attack and evade attacks from opponents. An LED lamp, a buzzer, and an ultrasonic sensor were used in the tool's design. When the athlete runs toward the sensor—which is identified by a buzzer that sounds and an LED that illuminates—the gadget functions as follows: the athlete waves his hand at the sensor. The distance between the instruments is positioned according to the athlete's needs and skill level. The website that has been developed will show the ultrasonic sensor's detecting findings. The website's architecture allows for multiple tool function configurations, including training mode, tool delay, tool duration, tool detection distance, and indicators of the number of connected sensors. When the tool's durability was tested against distance, it was found to be able to establish a connection between the client and server up to 20 meters away with an average connected time of 27.39. The tool's delay test yields an average of 14.57 seconds. an average of 0.078 when the tool's point inaccuracy is tested.
Optimasi Waktu Reaksi dan pH terhadap Peningkatan Yield Eco Enzyme Teodora Dasilva; Syntia Nabila; Mega Kasmiyatun; Ery Fatarina Purwaningtyas; Priyono Kusumo
Jurnal Sains dan Teknologi Vol. 3 No. 2 (2024): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v3i2.672

Abstract

Eco enzyme is a biocatalyst obtained from a fermentation process involving microorganisms, and has the potential to be applied in various environmental and industrial fields. This research aims to determine the optimum conditions for the volume of eco enzyme, determine the most influential variables between time and pH used during the eco enzyme fermentation process and the chemical characteristics of the eco enzyme product which was fermented for three months. Optimization method using the Central Composite Design – Response Surface Methodology (RSM) method. The comparison made in eco enzyme fermentation is water: organic waste: molasses = 10: 3: 1 = 5000 ml: 1500 gr: 500 gr. Fermentation for 3 months resulted in optimum conditions for making eco enzyme found at a reaction time of 96.213 and a pH of 5.207, with a maximum % yield of 10.24. The most influential variable in this research is pH. FTIR test results show the strongest absorption in the -OH (hydroxyl) group with alcohol properties at a wavelength of 3307.99 cm⁻¹, with a low transmittance of 48.2%. This group has antimicrobial properties that support the growth of good bacteria and other microbes.
Prototype Digester Berpengaduk dan Sensor Pendeteksi Gas methane Berbasis IoT Muhammad Zhaky; Eko Supriadi
Jurnal Sains dan Teknologi Vol. 3 No. 2 (2024): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v3i2.675

Abstract

Spentwash, a liquid waste byproduct of bioethanol production, is a potential raw material for biogas production due to its high organic content and abundant availability. PT Energi Agro Nusantara (ENERO) utilizes spentwash through anaerobic digestion processes to produce biogas, which is used as an alternative energy source.However, optimizing biogas production still faces various challenges, including the need for efficient monitoring and increased production volume. Internet of Things (IoT)-based technology offers a solution through real-time monitoring systems, enabling direct and accurate methane level measurements.This study aims to develop a prototype of a stirred digester equipped with an IoT-based methane gas detection sensor, using the MQ-2 sensor to detect methane gas.
Pembuatan Biodigester Type Batch Skala 120 Liter untuk menghasilkan Biogas dari Campuran Bahan Baku Kotoran Kambing, Kotoran Ayam dan Limbah Sayur Popi Febrianti; Nadiareta Sitorus; Desniorita Desniorita; Miftahurrahmah Miftahurrahmah
Jurnal Sains dan Teknologi Vol. 3 No. 2 (2024): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v3i2.676

Abstract

Biogas is a potential renewable energy source to meet energy needs, especially in remote areas that do not have access to electricity. The process of making biogas is carried out through anaerobic fermentation of organic materials such as vegetable waste, livestock manure and agricultural waste. This research aims to design a batch type biodigester that can produce biogas from a mixture of goat manure, chicken manure and vegetable waste. Biodigester is a reactor used to produce biogas. The stirred biodigester aims to mix the substrate evenly in the biodigester and prevent the formation of scum. The biodigester designed has a capacity of 120 liters with a stirring system to increase the efficiency of biogas production. The fermentation process was carried out for 21 days by monitoring parameters such as temperature, pH, Chemical Oxygen Demand (COD), and methane gas concentration (CH4). The results showed that the temperature and pH in the biodigester remained in optimal conditions for the activity of methanogenic microorganisms. The highest CH4 concentration measurement was recorded on day 20 at 60%, which indicates good biogas quality. In addition, the flame test on day 21 produced a blue flame, indicating a high CH4 content. The decrease in CH4 concentration at the end of the study was caused by the exhaustion of organic material. This research contributes to the development of efficient and environmentally friendly biodigester technology to produce biogas as a renewable energy source.
Sistem Kendali Material Handling Doors Operation Menggunakan PLC Siemens S7-300 pada Mesin Furnace Area Bar Mill di PT. Krakatau Baja Kontruksi Fredy Kusuma Nugraha; Mustofa Abi Hamid
Jurnal Sains dan Teknologi Vol. 3 No. 2 (2024): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v3i2.677

Abstract

Material handling is a form of transportation or conveyance carried out in an industrial company environment. This activity involves moving raw materials, semi-finished goods, or finished goods from the location of origin to a predetermined location. One of the material handling is Doors operation which is located in the furnace machine section which functions as a gate to release a billet that has been heated. In Material Handling, especially in doors operation, an automatic control system using a Programmable Logic Controller is needed. The type of PLC used is the Siemens S7-300 PLC. With the method of observation (observation) in the field of all the equipment that is done and with the literature study can be known material handling control system, especially doors operation. From the results of research on material handling doors operation, it can be seen that this control aims as a gate to release a billet either by remote control or direct control, so that billets that have been heated to a temperature of 1200 degrees can come out effectively and will go to several stands to be printed. All stages in material handling, especially doors operation, can be monitored on the CCTV screen and HMI (Human Machine Interface).

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