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p-Index From 2021 - 2026
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All Journal Scientific Journal of Mechanical Engineering Kinematika International Journal of Learning Reformation in Elementary Education
Heldayanti
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Religion Humanities Automotive Engineering Education Energy Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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ANALISA PRODUKTIVITAS EXCAVATOR KOMATSU PC 2000 PADA OVERBURDER REMOVAL DI PT. JHONLIN BARATAMA I Wayan Wawan Mariki; Duan Arpilanoor; Heldayanti
Scientific Journal of Mechanical Engineering Kinematika Vol 6 No 2 (2021): SJME Kinematika Desember 2021
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v6i2.194

Abstract

In mining activities, one of the overburden activities is heavy equipment working at PT. Jhonlin Baratama in digging and loading using a PC 2000 excavator for the productivity process. With the company's production target of 865 BCM/hour. This research aims to determine the data of the cycle time in the excavator productivity of the excavator PC 2000 by using the calculation method match factor. The results of the calculation of the total average cycle time of the excavator is PC 200030.33 seconds, with a Bucket capacity of 12 BCM, Fill factor 0.9%, Swell Factor 0.8 with efficiency work 0.79%, while the total average HDK conveyance is Komatsu 78510.61 seconds and HDK Komatsu 465 is 9.99 minutes, from the calculation of the productivity of the excavator PC 2000 of 810 BCM/hour so that the production target has not been achieved optimally because in processing the macth factor is 0.74.
Transformation of Differentiated Teaching Methods to Promote Critical Thinking in Primary School Pupils Indriani, Fitri; Satrianawati; Heldayanti
International Journal of Learning Reformation in Elementary Education Vol. 5 No. 01 (2026): International Journal of Learning Reformation in Elementary Education
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/IISTR.ijlree.001796

Abstract

This study examines how differentiated instruction is implemented in primary school classrooms and its role in fostering students’ higher-order thinking skills. Using a qualitative case study approach, data were collected through in-depth interviews, classroom observations, and document analysis involving five teachers from grades 1 to 5. The findings indicate that teachers adapt instructional strategies to address students’ readiness levels, learning profiles, and individual interests. This pedagogical transformation is reflected in the use of contextual learning, project-based activities, reflective practices, and digital resource integration. These approaches create more inclusive and responsive learning environments. As a result, students demonstrate improved analytical reasoning, evaluative thinking, and argument construction. The study underscores that differentiated instruction not only enhances student engagement but also supports meaningful learning. It concludes that this approach is essential for meeting the demands of 21st-century education and aligns closely with the principles of the Merdeka Curriculum.
Co-Authors Duan Arpilanoor Fitri Indriani Mariki, I Wayan Wawan Satrianawati