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All Journal Joong-Ki : Jurnal Pengabdian Masyarakat Jurnal Sains dan Teknologi Joong-Ki Joong-Ki
Herlin Sumarna
Politeknik Negeri Sriwijaya
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Workshop Teknik Penulisan Karya Ilmiah Bagi Guru di SMA Negeri 1 Lubuk Dalam Edi Kurniawan; Meyci Trisna; Nina Hartati; Herlin Sumarna; Toni Okviyanto; Tri Satya Ramadhoni
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 2 No. 2: Mei 2023
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/joongki.v2i2.1639

Abstract

Scientific work is a form of scientific publication used by teachers to support the Sustainable Professional Program (PKB) that has been launched by the government to actualize the work of teachers as professional staff. Many teachers do not understand how to make a good and correct scientific work, even though scientific work is a mandatory requirement for teachers for the promotion process. The implementation of community service activities aims to provide workshops on scientific writing techniques for teachers at SMA Negeri 1 Lubuk Dalam. The strategy used is through lecture, tutorial, and discussion methods and observation sheets to see the effectiveness of the methods used. The result of this dedication is that the teacher is able to understand the techniques of writing scientific papers well and correctly so that they are suitable for publication
Workshop Teknik Penulisan Karya Ilmiah Bagi Guru di SMA Negeri 1 Lubuk Dalam Edi Kurniawan; Meyci Trisna; Nina Hartati; Herlin Sumarna; Toni Okviyanto; Tri Satya Ramadhoni
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 2 No. 2: Mei 2023
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/joongki.v2i2.1639

Abstract

Scientific work is a form of scientific publication used by teachers to support the Sustainable Professional Program (PKB) that has been launched by the government to actualize the work of teachers as professional staff. Many teachers do not understand how to make a good and correct scientific work, even though scientific work is a mandatory requirement for teachers for the promotion process. The implementation of community service activities aims to provide workshops on scientific writing techniques for teachers at SMA Negeri 1 Lubuk Dalam. The strategy used is through lecture, tutorial, and discussion methods and observation sheets to see the effectiveness of the methods used. The result of this dedication is that the teacher is able to understand the techniques of writing scientific papers well and correctly so that they are suitable for publication
Workshop Teknik Penulisan Karya Ilmiah Bagi Guru di SMA Negeri 1 Lubuk Dalam Edi Kurniawan; Meyci Trisna; Nina Hartati; Herlin Sumarna; Toni Okviyanto; Tri Satya Ramadhoni
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 2 No. 2: Mei 2023
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/joongki.v2i2.1639

Abstract

Scientific work is a form of scientific publication used by teachers to support the Sustainable Professional Program (PKB) that has been launched by the government to actualize the work of teachers as professional staff. Many teachers do not understand how to make a good and correct scientific work, even though scientific work is a mandatory requirement for teachers for the promotion process. The implementation of community service activities aims to provide workshops on scientific writing techniques for teachers at SMA Negeri 1 Lubuk Dalam. The strategy used is through lecture, tutorial, and discussion methods and observation sheets to see the effectiveness of the methods used. The result of this dedication is that the teacher is able to understand the techniques of writing scientific papers well and correctly so that they are suitable for publication
Pengaruh Beban Operasi terhadap Nilai Net Plant Heat Rate (NPHR) pada Pembangkit Listrik Tenaga Uap Herlin Sumarna; Tri Satya Ramadhoni; Gurruh Dwi Septano; Purfaji Purfaji; Toni Okviyanto
INSOLOGI: Jurnal Sains dan Teknologi Vol. 5 No. 2 (2026): April 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v5i2.7977

Abstract

This study aims to analyze the effect of variations in operating load on the Net Plant Heat Rate (NPHR) at a 3×10 MW coal-fired power plant. The independent variables examined are the generator operating loads at 50%, 75%, and 100%, while the dependent variable is the NPHR value. The research data consists of 30 samples distributed proportionally across each load level. Data analysis was performed using a one-way Analysis of Variance (ANOVA) to test the significance of differences in the mean NPHR values across the operating load variations. The results indicate that variations in operating load significantly affect the NPHR value (p-value < 0.05). The highest average NPHR value was obtained at 50% load at 4160 kcal/kWh, then decreased at 75% load to 3861 kcal/kWh, and reached the lowest value at 100% load at 3625 kcal/kWh. These results indicate that an increase in operating load correlates with a decrease in the NPHR value and an increase in the plant’s thermal efficiency. Thus, operating the coal-fired power plant under conditions approaching optimal design capacity can improve fuel efficiency and support the optimization of the plant’s operational performance.
Pengaruh Penambahan Selulosa Kulit Nipah (Nypa fruticans) terhadap Karakteristik Smart Packaging Berbasis Pati – Kitosan Nina Hartati; Tiara Andriani; Edi Kurniawan; Herlin Sumarna
INSOLOGI: Jurnal Sains dan Teknologi Vol. 5 No. 2 (2026): April 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v5i2.7978

Abstract

The development of environmentally friendly packaging materials with the ability to monitor food quality has become an important focus in biomass-based innovations. This study aims to develop bioplastic films based on durian seed starch–chitosan reinforced with cellulose from nipa palm husk and functionalized as smart packaging by incorporating Coleus scutellarioides (miana) extract as a natural indicator. The films were prepared using the solution casting method with varying starch-to-chitosan ratios (2:8, 4:6, 6:4, and 8:2) and cellulose additions (1 g, 3 g, and 5 g). Characterization included tensile strength, elongation at break, Young’s modulus, Water Vapor Permeability (WVP), Water Vapor Transmission Rate (WVTR), and sensitivity to meat quality. The results showed that the highest tensile strength (10.718 MPa) was obtained at the 2:8 ratio with 1 g cellulose, while the highest elongation (3.49%) was observed at the 8:2 ratio. The maximum Young’s modulus (9.40 MPa) was achieved at the 4:6 ratio with 1 g cellulose. The lowest WVP and WVTR values were found at the 6:4 ratio with 3 g cellulose, indicating improved barrier properties. The anthocyanins in miana extract exhibited a clear color response to pH changes, with prolonged storage leading to a shift toward acidic conditions. Overall, the optimal addition of cellulose enhanced mechanical and barrier properties, whereas excessive amounts led to agglomeration and reduced performance. These findings demonstrate the potential of combining durian seed starch, chitosan, cellulose, and miana extract as a biodegradable smart packaging material.
Analisis Tegangan dan Kegagalan Yoke Propeller Shaft Truk Angkutan Sawit Menggunakan Metode Elemen Hingga Tri Satya Ramadhoni; Herlin Sumarna; Toni Okviyanto; Purfaji Purfaji; Rachmat Dwi Sampurno
INSOLOGI: Jurnal Sains dan Teknologi Vol. 5 No. 2 (2026): April 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v5i2.8001

Abstract

Failure of slip yoke components in palm oil transport vehicle transmission systems is generally caused by complex and cyclic dynamic loading. This study aims to analyze stress distribution and predict failure locations using a Metode Elemen Hingga (FEM)-based approach. A three-dimensional model was developed from actual geometry with controlled simplification using AISI 4140 material. Mesh convergence and quality evaluation were conducted to ensure numerical reliability. The results show that maximum stress increases with load, reaching 196.14 MPa, 294.38 MPa, 392,40 MPa, and 490.52 MPa for loads of 4, 6, 8, and 10 tons, respectively. At 10 tons, the stress exceeds the material yield strength (415 MPa), indicating plastic deformation. Stress concentration occurs at the critical section (C–C) due to geometric discontinuities and combined loading, consistent with observed failure locations. Comparison with analytical results shows less than 1% deviation, confirming model accuracy. This study demonstrates that FEM effectively predicts stress distribution and failure mechanisms, providing a basis for design optimization and maintenance strategies.
Peningkatan Efisiensi Produksi Briket Batok Kelapa Menggunakan Mesin Cetak Kapasitas 10kg Baiti Hidayati; M. Rasid; Herlin Sumarna; Romli Romli; Aji Pangestu Wijaya
INSOLOGI: Jurnal Sains dan Teknologi Vol. 5 No. 2 (2026): April 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v5i2.8091

Abstract

Manual production of coconut shell briquettes in small and medium-scale industries often faces limitations in productivity, product uniformity, and dependence on human labor. This study aimed to evaluate the efficiency improvement of coconut shell briquette production through the use of a 10 kg-capacity briquetting machine. An experimental method was applied by comparing mechanical briquetting and manual hand-pressing using the same raw material composition, namely 7 kg of coconut shell charcoal powder, 3 kg of tapioca starch adhesive, and 1 liter of water as a mixing aid. The observed parameters included production capacity, production time, physical quality score, quality consistency, and electrical energy consumption. The results showed that the machine produced 10 kg of briquettes in 1 hour, whereas the manual method produced approximately 3.3 kg per hour and required about 3 hours to reach the same production quantity. The machine increased production capacity by approximately 200% and reduced production time by approximately 67%. The physical quality score increased from 70% to 85%, while quality consistency increased from 80% to 95%. Although the machine consumed 0.5 kWh per process, the energy requirement was relatively low, equivalent to 0.05 kWh/kg of briquettes. These findings indicate that the 10 kg-capacity briquetting machine is feasible as an appropriate technology to improve productivity and product uniformity for small and medium-scale coconut shell briquette producers.
Co-Authors Aji Pangestu Wijaya Baiti Hidayati Edi Kurniawan Gurruh Dwi Septano M. Rasid MARIA BINTANG Meyci Trisna Nina Hartati Purfaji Purfaji Rachmat Dwi Sampurno Romli Romli Tiara Andriani Toni Okviyanto Tri Satya Ramadhoni