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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Puan Indonesia
Daniel H. S. Napitu
Politeknik Negeri Medan
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Public Health

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Analisis Resonansi dan Rasio Damping Menara Masjid Baiturrahman terhadap guncangan gempa bumi Angelia M. Purba; Daniel H. S. Napitu; Meidi W. Lestari; Juanto Simangunsong; Elferida Hutajulu; Nicodemus F. Hutabarat; Aprima A. Matondang
Jurnal Penelitian Pendidikan IPA Vol 12 No 4 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i4.11221

Abstract

The electrification of urban public transportation has become a key strategy for reducing energy consumption and greenhouse gas emissions while improving overall system efficiency. This study develops a comprehensive modeling framework to evaluate the energy consumption and charging infrastructure requirements of electric bus fleets operating in urban environments, incorporating key operational parameters such as travel distance (126 km/day), vehicle energy efficiency (1.2–1.5 kWh/km), fleet size (5–30 buses), and regenerative braking efficiency (25%). The results indicate that a single electric bus consumes approximately 151.2 kWh/day under typical operating conditions, which can be reduced to 113.4 kWh/day through regenerative braking, representing a 25% improvement. At the fleet level, electricity demand increases proportionally, reaching 0.76 MWh/day (5 buses), 1.51 MWh/day (10 buses), 2.27 MWh/day (15 buses), and 3.02 MWh/day (20 buses). Furthermore, fast-charging systems with a capacity of 150 kW can deliver up to 300 kWh within 2 hours but may introduce peak load demands of up to 0.75 MW. These findings highlight the importance of integrated energy modeling, smart charging strategies, and grid-aware planning
PELATIHAN IMPLEMENTASI VIRTUAL LAN (VLAN) PADA JARINGAN KOMPUTER DI SMKS PARULIAN 1, KECAMATAN MEDAN KOTA, KOTA MEDAN, PROVINSI SUMATERA UTARA Daniel H. S. Napitu; Angelia Maharani Purba; Eva M. Simatupang; Arlina Pratiwi Purba; Ernie S. Y. Sitanggang; Susaidin Susaidin
PUAN INDONESIA Vol. 7 No. 2 (2026): Jurnal Puan Indonesia Vol 7 No 2 januari 2026
Publisher : ASOSIASI IDEBAHASA KEPRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37296/jpi.v7i2.463

Abstract

The rapid development of information technology demands that educational institutions, particularly Sekolah Menengah Kejuruan (SMK) majoring in Computer and Network Engineering, be able to follow and implement the latest network technologies. One of the basic technologies that must be mastered is the Virtual Local Area Network (VLAN), which allows logical network segmentation to improve efficiency, security, and network management. However, based on initial observations and communication with partners, it was discovered that some schools still do not have adequate module kits to support network management, thus students do not yet have these competencies. This Community Service activity aims to improve the competence of 11th grade students in understanding and implementing VLANs on computer networks. The method used is hands-on lab-based training that includes VLAN configuration using managed switch network devices. From the results of this community service activity, students can understand Virtual Local Area Networks, students' opportunities to do direct practice are more evenly distributed along with the increase in practice modules and increase students' enthusiasm in directly implementing VLANs on computer networks. Keywords- Virtual LAN (VLAN), jaringan komputer, SMK
Co-Authors Angelia M. Purba Angelia Maharani Purba Ernie S. Y. Sitanggang Eva M. Simatupang Hutajulu, Elferida Juanto Simangunsong Meidi W. Lestari Nicodemus F. Hutabarat Purba, Arlina Pratiwi Susaidin Susaidin