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All Journal Rotasi JURNAL TEKNIK MESIN Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Rekayasa Mesin Agregat: Jurnal Ekonomi dan Bisnis Aptisi Transactions on Technopreneurship (ATT) Infotekmesin Jurnal Riset Jakarta
Yurianto Yurianto
Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro
Humanities Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Mechanical Engineering Social Sciences

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Pengaruh Metode Quenching dan Tempering Terhadap Kekerasan Material Hot rolled Plate (HRP) Steel Nurhidayat, Akhlis Rahman Sari; Laksana, Nur Akhlis Sarihidaya; Yurianto, Yurianto
Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i2.1927

Abstract

Hot rolled plate steel as a material to be used for steel armor needs to have the characteristics of a high hardness value. Medium carbon steel as the basic material is quenched at a temperature of 900 oC and tempering is carried out at a temperature of 125 oC and 175 oC with a holding time of 30 minutes. The Ms value is a benchmark for changes in martensite which is influenced by the constituent elements of the material. The use of water as a quench medium changes the structure of austenite to martensite. The martensite structure that occurs increases the optimum hardness value in HRP Steel material. The tempering process carried out above the Ms value causes a decrease in the hardness value. The highest hardness value was obtained in the quenching process with 542 HV which was influenced by the distribution of martensite. The decrease in hardness value occurs due to the tempering process, the average hardness value at temper 125 oC is 524.4 HV and 175 oC is 524 HV.
Rich Picture Analysis of MRT Jakarta Transit-Oriented Development (TOD) Business Ecosystem Ardiansyah, Zulfadli; Marimin, Marimin; Indrawan, Dikky; Yurianto, Yurianto
Aptisi Transactions On Technopreneurship (ATT) Vol 7 No 2 (2025): July
Publisher : Pandawan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34306/att.v7i2.601

Abstract

Transit-oriented development (TOD) aims to create added value by optimizing regions around transportation hubs. It emphasizes the integration of mass transit systems with non-motorized transport while reducing the use of motor vehicles through the development of dense, mixed-use areas. This research examines the role of MRT Jakarta Co. in building a business ecosystem that supports TOD area creation. The objective is to identify key stakeholders and strategies that influence TOD implementation. This research uses Soft System Methodology (SSM), with data collected from seven MRT Jakarta Co. employees and expert interviews. Rich Picture analysis is used to visualize the interactions and challenges in the system. The results show that collaboration among MRT Jakarta Co., developers, government, associations, and landowners is essential. Barriers include regulatory limitations, inconsistent policies, and funding constraints. The Rich Picture reveals a complex structure of roles, norms, and power dynamics that shape TOD success. The research concludes that regulatory support, stakeholder engagement, and clear coordination mechanisms are critical for effective TOD development. These findings can guide policymakers and urban planners in enhancing transit-based city planning.
Co-Authors . Benni Achmad Noerkhaerin Putra Agus Suprihanto Akhlis Sarihidaya Laksana , Nur Ardian Budi W Ardiansyah, Zulfadli Aulia Rahman Eko Boedi Soesetyo Eko Boedisoesetyo Indrawan, Dikky Kusumaharja, Rezka Dwima Marimin Marimin Mehdi Maulana Munthe, Marthin Nova Arief Setiyanto Nur Akhlis Sarihidaya Laksana, Nur Akhlis Sarihidaya Nurhidayat, Akhlis Rahman Sari Padang Yanuar Padang Yanuar Padang Yanuar Padang Yanuar Prasetia, Zakaria Frani Rahman Sari Nurhidayat, Akhlis Rudy Soenoko S., Frandy Alensius S., Harun Firman Putra Soeprapto, Wahyono Soeprapto, Wahyono Sri Nugroho Sukamta Sukamta Susilo Adi Widyanto Trihono Kadri Wahyono Suprapto Yohanes BEN Yusuf Umardani