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All Journal Rotasi Jurnal Nasional Manajemen Pemasaran dan SDM
Prasetyo, Tri Wahyu
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Economics, Econometrics & Finance Mechanical Engineering Social Sciences

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Investigating the Tribological Performance of Natural Rubber Additives in Palm Oil-Based Lubricants Aji, Ahmad Frantoni; Alfian, Devia Gahana Cindi; Prasetyo, Tri Wahyu; Firjatullah, Ahmad Labib; Sufra, Rifqi; Pujiyulianto, Eko; Silitonga, Dicky Januarizky; Auriyani, Wika Atro; Yusupandi, Fauzi
ROTASI Vol 26, No 3 (2024): VOLUME 26, NOMOR 3, JULI 2024
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.26.3.57-64

Abstract

Human dependence on mineral-based energy sources poses challenges related to toxicity, depletion, degradation, and environmental hazards. An appropriate replacement for mineral-based lubricants has yet to be realized; one available option for humans is alternative, renewable, environmentally friendly, and biodegradable energy sources. Lubricants play an important role in product processing, transportation, agriculture, and other key sectors in industrial development. This study was conducted to explore the potential use of palm oil as the main ingredient with the addition of rubber as an additive. The method of making the lubricant involved mixing 3%, 5%, and 7% rubber latex with sonicated palm oil using UAE. Next, wear testing was performed using a tribometer based on the ball-on-disc principle, utilizing a modified bench-top drill machine. The testing was carried out at room temperature, maintaining a constant load of 8.83 N and a rotational speed of 180 rpm for 5 minutes per sample. Microscopic analysis of the wear scars on the plate samples showed different wear patterns and characteristics for each lubricant, with measurements taken at various positions for accuracy. The results indicated that the lubricant with a 5% rubber mixture was the best, with a wear width of 535.9126 µm, compared to the commercial lubricant (SAE 15W 40) which had a wear width of 539.906 µm. This research demonstrates the potential use of a palm oil and rubber mixture as a more environmentally friendly lubricant alternative.
Pengaruh Kualitas Layanan Terhadap Kepuasan Pelanggan Serta Dampaknya Pada Loyalitas Pelanggan E -Commerce Shopee Sikki, Nurhaeni; Ernawati, Ernawati; Kartina, Hana Betel; Jacob, Lodia Antonia; Nasution, Caesar Rayhand Arrafif; Suriansyah, Suriansyah; Lusito, Tri Astrit; Prasetyo, Tri Wahyu
Jurnal Nasional Manajemen Pemasaran dan SDM Vol. 5 No. 4 (2024): Jurnal Nasional Manajemen Pemasaran dan SDM
Publisher : Training & Research Institute - Jeramba Ilmu Sukses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47747/jnmpsdm.v5i4.2525

Abstract

This study investigates the impact of service quality on customer satisfaction and its subsequent effect on Shopee e-commerce customer loyalty. Primary data were collected through questionnaires distributed to respondents and analyzed using path analysis with the SmartPLS 3.0 application. The findings indicate that service quality plays a significant role in influencing customer satisfaction, highlighting its importance as a key determinant in the e-commerce service landscape. However, the research also reveals that service quality does not directly affect customer loyalty. Instead, customer satisfaction acts as a critical mediator that significantly influences customer loyalty. These insights suggest that while improving service quality is essential, fostering customer satisfaction is even more pivotal for retaining loyal customers in the competitive e-commerce market. By focusing on enhancing the overall satisfaction of its users, Shopee can strengthen customer loyalty and maintain its competitive edge. The study underscores the interconnectedness of these factors and provides valuable recommendations for businesses aiming to improve customer experiences and sustain long-term growth in the digital marketplace.
Co-Authors Aji, Ahmad Frantoni Auriyani, Wika Atro Devia Gahana Cindi Alfian Dicky J. Silitonga Eko Pujiyulianto Ernawati Ernawati Firjatullah, Ahmad Labib Jacob, Lodia Antonia Kartina, Hana Betel Lusito, Tri Astrit Nasution, Caesar Rayhand Arrafif Rifqi Sufra Sikki, Nurhaeni Suriansyah, Suriansyah Yusupandi, Fauzi