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All Journal Jurnal Pengabdian Masyarakat Charitas Metris: Jurnal Sains dan Teknologi Cylinder : Jurnal Ilmiah Teknik Mesin
Goenawan, Stephanus
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Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Continuous Method: A Flexible Solution for Metal Length Expansion Measurement in the Modern Manufacturing Industry Goenawan, Stephanus
Metris: Jurnal Sains dan Teknologi Vol. 26 No. 02 (2025): Desember
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v26i02.7039

Abstract

Measurement of metal length expansion is crucial in the modern manufacturing industry as it impacts product design, production, and performance. Current conventional method (Discrete Methods/DM) relies on an initial reference length (L0), which limits the flexibility of in-situ and continuous measurements. This study compares the accuracy and flexibility of DM with the Continuous Method (CM), an approach that potentially eliminates the need for L0 after the initial measurement. Using numerical simulations on five metals, this study analyzes calculations for estimating metal length expansion under various heating scenarios. The results show that both methods provide similar differences in metal length thermal expansion values (difference <0.0001 m), confirming their comparative accuracy. However, CM proves significantly more flexible as it allows the calculation of metal length thermal expansion estimates at arbitrary temperatures without the need to refer to L0, unlike DM, which requires L0 for consistency. This flexibility makes CM more practical for both incremental and real-time measurements, supporting the integration of automation into precision manufacturing processes. Implications for the manufacturing industry include increased efficiency of in-situ measurements, reduced reliance on initial data, and the potential for better integration with continuous quality control systems and Digital Twins.
Sosialisasi Teknologi Pendidikan Berhitung Kreatif Goenawan, Stephanus; Sutresno, Stephen Aprius; Hidayat, Trifenaus Prabu
Jurnal Pengabdian Masyarakat Charitas Vol. 5 No. 02 (2025): Jurnal Pengabdian Masyarakat Charitas
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Katolik Indonesia Atma Jaya Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/charitas.v5i02.7047

Abstract

Learning mathematics, especially arithmetic and number patterns, is often a challenge for students due to the lack of creative approaches and the use of technology in the learning process. This community service program aims to improve the competence of teachers and lecturers in teaching innovative arithmetic concepts through the Educational Technology Online Workshop: Creative Arithmetic in the Era of Artificial Intelligence. This activity is conducted online and attended by participants from various backgrounds, including teachers, students, and the general public. The implementation method includes introducing the concept of regularity of number patterns, demonstrating the Vertical Metric method, and training in using web-based digital applications for creative calculations from licensed association partners. The activity results showed an increase in participants' understanding of developing creative learning strategies and high enthusiasm from participants in implementing technology-based arithmetic methods in their respective educational environments. This training positively impacts educators' pedagogical skills and encourages students' interest in learning mathematics through a more interesting and applicable approach.
Pendekatan Model Fungsi Non-Linier Perubahan Suhu Pada Pencampuran Zat Cair Menggunakan Bantuan Hukum Entropi Goen Goenawan, Stephanus; Goenawan, Stephanus Ivan
Cylinder : Jurnal Ilmiah Teknik Mesin Vol 12 No 1 (2026): April 2026
Publisher : Department of Mechanical Engineering Atma Jaya Catholic University of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/cylinder.v12i1.7785

Abstract

The Second Law of Thermodynamics, also known as the Law of Entropy, explains that the level of disorder or entropy will continue to increase in a closed system operating in forward time. Along with its development, a further concept emerged called the Second Law of Thermodynamics Point One (2.1) or Goen's Law of Entropy. This law states that the average entropy in a process in the forward direction is always smaller than the average entropy in the backward direction. The backward average entropy process is the opposite of the forward average entropy, which works on the heat function to reflect the forward process. Applying Goen's Law of Entropy, a non-linear model based on the function of time can be created that describes the change in temperature of the combination of two liquids, starting from the initial conditions before mixing to reaching thermal equilibrium in a closed container. The results of this non-linear exponential modeling in mixing two liquids prove the importance of Goen's Law of Entropy as a development of the Second Law of Thermodynamics, with significant benefits in explaining the phenomenon of heat transfer and the process towards equilibrium.
Co-Authors Goenawan, Stephanus Ivan Stephen Aprius Sutresno, Stephen Aprius Trifenaus Prabu Hidayat