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All Journal Jurnal Teknologi dan Riset Terapan (JATRA) V-MAC (Virtual of Mechanical Engineering Article) Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Makara Journal of Technology Journal of Engineering Science and Technology Management
Nurul Laili Arifin, Nurul Laili
Sekolah Tinggi Teknologi Nuklir (STTN)-BATAN,Yogyakarta
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Multistage Sonication Effect on the Composition and Properties of Degraded Chitosan Product Arifin, Nurul Laili; Savitri, Emma; Indah, Anjar; Putra, Fesa; Sumarno, Sumarno
Makara Journal of Technology Vol. 23, No. 1
Publisher : UI Scholars Hub

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Abstract

The sonication method randomly breaks polymer chains to produce a varied distribution of products. A scheme with multi-stage sonication steps is proposed to identify oligomers and low molecular weight chitosan based on changes to the degrad-ed product. For each sonication level, 1% (w/v) chitosan in 1% (v/v) aqueous acetic acid was sonicated for 120 min at 60 °C. The products of the sonication treatment were deprotonized by adding an alkali solution, freeze dried and insoluble product re-sonicated until a low molecular weight was produced. Low molecular weight chitosan/insoluble products were character-ized with Fourier-transform infrared spectra (FT-IR) and X-ray diffraction (XRD) to determine the effect of multistage soni-cation on degree of deacetylation (DD) and degree of crystallinity. The viscosity of the average molecular weight of insolu-ble chitosan was estimated by a viscometric method, while the degree of polymerization (DP) of the chitosan oligomers (COS) were determined by end group analysis. The results showed that the molecular weight of insoluble chitosan decreased and reached a limiting value, (Mlim). The percent yield of oligoglucosamine of the soluble products increased with the num-ber of the sonication stages. The degree of crystallinity of insoluble chitosan increased from 19% to 34.14% while the DD decreased from 82% to 78.1%.
Perbandingan Ketangguhan Material S355G7+M Pada Pengelasan SAW (Original) dan SMAW (Repair) Dengan Metode Impact Charpy V-Notch Puspita, Roza; Rahman, Muhammad Noval; Arifin, Nurul Laili; Butar Butar, Hendra
Jurnal Teknologi dan Riset Terapan (JATRA) Vol. 6 No. 1 (2024): Jurnal Teknologi dan Riset Terapan (JATRA) - June 2024
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jatra.v6i1.7624

Abstract

Proses pengelasan SAW menggunakan fluks yang berbentuk seperti pasir yang berfungsi melindungi logam pengisi yang mencair saat proses pengelasan agar tidak terjadinya kontaminasi dengan udara luar sehingga didapatkan hasil pengelasan yang cukup baik. Sedangkan elektroda SMAW (Shielded Metal Arc Welding) diselaputi atau dilindungi oleh fluks dengan proses pengerjaan secara manual. Penelitian ini bertujuan untuk menganalisa perbandingan hasil pengelasan dengan menggunakan metode standar WPS PS-03 (Original) dan WPS PS-03R (Repair), dengan menggunakan pengujian impact untuk mengetahui ketangguhan pada spesimen S355G7+M. Pengujian ini bertujuan untuk mengetahui ketangguhan impact pada bagian hasil pengelasan pada WPS PS-03 (Original) dan WPS PS-03R (Repair). Spesimen WPS PS-03R memiliki nilai lebih besar di bandingkan dengan spesimen WPS PS-03. Apabila nilai kekuatan spesimen semakin besar, maka semakin kuat dan tangguh pula pada spesimen tersebut. Temperatur pada spesimen sangat berpengaruh terhadap keuletan atau kegetasan suatu logam. Semakin tinggi temperaturnya maka semakin ulet logam tersebut begitupun sebaliknya.
ANALISIS TINGKAT RISIKO POSTUR KERJA DAN PERBAIKAN ERGONOMI PADA PENEMPATAN MESIN GERINDA ULIR PIPA OCTG MENGGUNAKAN METODE REBA Ulfah, Nurul; Wibowo, Ari; Ariyanto, Nugroho Pratomo; Puspita, Roza; Arifin, Nurul Laili; Sembiring, Nikolas; Adicita, Yosef
Virtual of Mechanical Engineering Article Vol 10 No 2 (2025): V-MAC
Publisher : Prodi Teknik Mesin Universitas PGRI Banyuwangi

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Abstract

Postur kerja yang tidak sesuai bisa menjadi pemicu timbulnya keluhan fisik pada pekerja, terutama jika dilakukan dalam waktu lama dan berulang. Penelitian ini bertujuan untuk menganalisis postur kerja operator dalam proses penggerindaan ulir pada pipa OCTG dengan menggunakan metode Rapid Entire Body Assessment (REBA), serta perbaikan ergonomi yang dibutuhkan untuk mengurangi potensi risiko. Penilaian dilakukan menggunakan metode REBA dengan pendekatan deskriptif semi-kuantitatif. Data diperoleh dari observasi langsung di lapangan, dokumentasi foto, pengukuran sudut tubuh menggunakan AutoCAD, dan wawancara dengan dua orang operator. Hasil awal menunjukkan bahwa posisi kerja operator termasuk dalam kategori risiko sedang, dengan skor REBA sebesar 7. Untuk mengurangi risiko tersebut, dudukan gerinda dibuat yang disesuaikan dengan tinggi badan operator. Setelah perbaikan dilakukan, skor REBA menurun menjadi 2, yang menunjukkan risiko rendah. Perubahan terlihat jelas terutama pada posisi punggung, leher, dan kaki yang menjadi lebih tegak dan seimbang. Hasil ini menunjukkan bahwa perbaikan sederhana yang memperhatikan kenyamanan postur kerja dapat berdampak besar terhadap kesehatan dan kenyamanan pekerja, serta membantu menciptakan lingkungan kerja yang lebih baik.
Static Stress Simulation Analysis of Skid Frame of Portable Open Waste Container Using FEA Method on SolidWorks Ulfah, Nurul; Adicita, Yosef; Ariyanto, Nugroho Pratomo; Puspita, Roza; Arifin, Nurul Laili; Wibowo, Ari; Putra, Rama Dani Eka
Journal of Engineering Science and Technology Management (JES-TM) Vol. 5 No. 2 (2025): September 2025
Publisher : Journal of Engineering Science and Technology Management

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Abstract

Portable open waste container is a traditional waste transport tool that is still widely used in various places. Skid frame is an important component in the construction of portable open waste container that serves to withstand static and dynamic loads during waste transport. Therefore, it is necessary to analyse the strength of the skid frame structure to ensure the design is able to withstand the given load. This research aims to analyse the stress distribution, deformation, and safety factor of the portable open waste container skid frame using the Finite Element Analysis method in Solidworks software. The analysis results show that the maximum stress that occurs in the skid frame is 249.921 MPa which almost reaches the yield stress of ASTM A36 steel material, which is 250 MPa, with a maximum deformation of 20.544 mm, and a minimum safety factor of 0.6. Based on these results, it can be concluded that the skid frame design needs to be optimised to improve the durability of the structure and safety during operation
Rancang Bangun Kerangka Tanaman Hidroponik Politeknik Negeri Batam Pamungkas, Nurman; Widiastuti, Hanifah; Restu, Fedia; Leksonowati, Nur Fitria Pujo; Arifin, Nurul Laili; Muvariz, Mufti Fathonah; Ulfah, Nurul; Widodo, Widodo; Baharudin, Budi; Fajrin, Aulia; Fyona, Annisa; Kamsyah, Domi; Gemala, Mega; Rosbandrio, Wowo; Aryswan, Adhe; Siregar, James; Saputra, Hendra; Irawan, Benny Haddli; Saputra, Ihsan; Ariyanto, Nugroho Pratomo; Mutiarani, Mutiarani
Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Vol. 5 No. 1 (2023): Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/abdimaspolibatam.v5i1.4866

Abstract

The hydroponic pilot project in the Batam State Polytechnic area was motivated by problems with economic conditions and declining health conditions during the Covid-19 pandemic. This project is expected to support the "growing your own food movement" in an effort to reduce unemployment, increase food security and a healthy lifestyle. The hydroponic method was chosen because it is very easy to do and does not require a large area of "‹"‹land. In this community service activity, a hydroponic plant building framework will be made as a prototype of an efficient and efficient hydroponic building so that it can be used by the wider community. This activity is also useful for applying design knowledge as one of the PbL activities carried out by CAD, CNC, CAM, and Fabrication Engineering courses in the Mechanical Engineering Department, so that it can become an arena for higher education participation to support people's lives. The method of implementing this community service activity is to make observations to find a suitable area to build a hydroponic plant house, then the results of the observations are poured in the form of a design by utilizing software so that the materials needed and the shape of the framework that is built can be known. The last activity is making a hydroponic plant place. This activity is planned to be carried out from April to November 2021. Based on the results of the evaluation of the service program questionnaire for product distribution, it is known that the majority of respondents are satisfied with the products produced.
OPTIMALISASI SUMBER DAYA DAN TEKNOLOGI DALAM PROGRAM PEMBERDAYAAN MASYARAKAT DESA PULAU JEMARE Leksonowati, Nur Fitria Pujo; Pamungkas, Nurman; Butar, Hendra Butar; Aryswan, Adhe; Juangsa Putra, Lalu Giat; Fyona, Annisa; Nugroho, Cahyo Budi; Wibowo, Ari; Gemala, Mega; Ariyanto, Nugroho Pratomo; Arifin, Nurul Laili; Puspita, Roza; Sriyanto, Sriyanto; Dzulfiqar, Mohamad Alif; Stefani, Windy; Batubara, Ninda Hardina; Fajrin, Aulia; Purba, Adi Syahputra; Manurung, Meilani Mandhalena; Budiman, Budiman
Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam Vol. 7 No. 1 (2025): Jurnal Pengabdian kepada Masyarakat Politeknik Negeri Batam
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/abdimaspolibatam.v7i1.7105

Abstract

This paper discusses in depth the implementation of the Village Community Empowerment Program (P2MD) carried out on Jemare Island. The main focus of this program is the application of appropriate technology, which includes public street lighting and a water pump system, both powered by solar panels. The main objective of this initiative is to improve the quality of lighting and the provision of clean water on the island, two important aspects that are greatly needed by the local residents. Through a series of intensive observations and discussions with the local residents, the community service team was able to identify and solve various problems faced by the residents. As a result of these efforts, four street lights have been successfully installed and operated, and the water pump system has been successfully connected to the water pump machine and water storage tank. It is hoped that this initiative can have a significant positive impact on the quality of life of the residents of Jemare Island, support their business activities and economy, and provide a solution to the uneven distribution of electricity by the state electricity company (PLN). This solution is practical because it utilizes renewable energy in the form of sunlight, which is abundantly available on Jemare Island.
Co-Authors Adhe Aryswan Adicita, Yosef Ari Wibowo Ariyanto, Nugroho Pratomo Baharudin, Budi Batubara, Ninda Hardina Budiman Budiman Butar Butar, Hendra Butar, Hendra Butar Cahyo Budi Nugroho Dzulfiqar, Mohamad Alif Emma Savitri Fajrin, Aulia Fyona, Annisa Gemala, Mega Hendra Saputra Indah, Anjar Irawan, Benny Haddli Juangsa Putra, Lalu Giat Kamsyah, Domi Kristianto, Fesa Putra Leksonowati, Nur Fitria Pujo Manurung, Meilani Mandhalena Mutiarani Mutiarani Muvariz, Mufti Fathonah Pamungkas, Nurman Purba, Adi Syahputra Puspita, Roza Putra, Rama Dani Eka Rahman, Muhammad Noval Restu, Fedia Rosbandrio, Wowo Saputra, Ihsan Sembiring, Nikolas Siregar, James Sriyanto Sriyanto Stefani, Windy Sumarno . Ulfah, Nurul Widiastuti, Hanifah Widodo Widodo