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All Journal Majalah Ilmiah MOMENTUM INOVTEK POLBENG Infotekmesin Dinamika Bahari: Journal of Maritime Dynamic Jurnal Pengabdian UNDIKMA Majalah Ilmiah Gema Maritim Saintara : Jurnal Ilmiah Ilmu-Ilmu Maritim DEVICE Jurnal Visi Pengabdian Kepada Masyarakat ALMUJTAMAE: Jurnal Pengabdian Masyarakat Jurnal Pengabdian Kepada Masyarakat Abdi Nusa Jurnal Pengabdian Kepada Masyarakat Abdi Putra Jurnal Maritim Polimarin Sewagati: Jurnal Pengabdian Masyarakat Indonesia International Journal of Educational Research Excellence (IJERE) Jurnal Masyarakat Mengabdi Nusantara Indonesian Research Journal on Education Kolaborasi: Jurnal Hasil Kegiatan Kolaborasi Pengabdian Masyarakat Palawa Jurnal Pengabdian Kepada Masyarakat
Wahyu Ari Putranto
Politeknik Maritim Negeri Indonesia
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Transportation Other

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Critical Thinking And 21st-Century Skills: Evaluating The Effectiveness Of Problem-Based Learning Models In Multicultural Classrooms Suyono; Juwarlan; Prijo Harsono; Erwin Sutantyo; Putranto, Wahyu Ari
International Journal of Educational Research Excellence (IJERE) Vol. 4 No. 2 (2025): July-December
Publisher : PT Inovasi Pratama Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55299/ijere.v4i2.1478

Abstract

This qualitative study examines the effectiveness of Problem-Based Learning (PBL) models in developing critical thinking and 21st-century skills among middle school students in multicultural classroom environments. Through an interpretive qualitative approach employing in-depth interviews, classroom observations, and focus group discussions, this research explores how PBL methodologies foster active learning and enhance students' analytical capabilities across diverse cultural backgrounds. The study involved 24 middle school teachers and 72 students from three multicultural schools in Indonesia, implementing a purposive sampling strategy. Data analysis utilized Braun and Clarke's reflexive thematic analysis framework to identify patterns and themes related to critical thinking development and cross-cultural learning experiences. Findings reveal that PBL significantly enhances students' critical thinking abilities, promotes collaborative problem-solving skills, and facilitates meaningful cross-cultural interactions. The research demonstrates that multicultural PBL environments create authentic learning opportunities where students develop both cognitive and social competencies essential for 21st-century success. However, implementation challenges include teacher preparation requirements, resource limitations, and the need for culturally responsive instructional materials. The study concludes that well-structured PBL approaches in multicultural settings effectively prepare middle school students for complex problem-solving while fostering intercultural understanding and communication skills. These findings contribute to educational scholarship by providing evidence-based insights into the integration of active learning methodologies with multicultural education frameworks
Pemberdayaan Masyarakat Desa Melalui Pelatihan Teknis Operasional Mesin Cetak Pelet bagi Kelompok Budidaya Ikan Kelurahan Beji Kabupaten Semarang Sri Tutie Rahayu; Dewa Gede Alit Astawa; Arif Rakhman Suharso; Wahyu Ari Putranto; Sandy Setyawan
Jurnal Pengabdian UNDIKMA Vol. 4 No. 4 (2023): November
Publisher : LPPM Universitas Pendidikan Mandalika (UNDIKMA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jpu.v4i4.8896

Abstract

This service aims to increase the knowledge and skills of the fish farming group in Beji Village, Semarang Regency, regarding the operational technicalities of pellet printing machines to empower village communities. The method used in this service was training, which included lectures, questions and answers, and direct practice in making fish food pellets with material provided to participants, including knowledge of tool operation, tool components, and troubleshooting on tools. This service partner was a fish farming group in Beji Village, East Ungaran District, to improve the community's economic level around the new campus of the Indonesian State Maritime Polytechnic in Ngobo sub-district, which borders Beji sub-district. This service evaluation instrument used an assessment of the training participants by practicing operating, disassembling, and installing spare parts for the fish pellet printing machine themselves. The results of this service showed that most members of the fish farming group in Beji sub-district could operate the fish pellet press and care for it well. Apart from that, the quality and quantity of catfish feed increased because the the fish farming group had been able to produce fish feed independently.
Pembuatan Pakan Ikan Pada Kelompok Budidaya Ikan di Ungaran Untuk Mengurangi Biaya Produksi Deri Herdawan; Sri Tutie Rahayu; Susanto Susanto; Widar Bayu Wantoro; Noviarianto Noviarianto; Arif Rakhman Suharso; Wahyu Ari Putranto; Nur Kholis
Kolaborasi : Jurnal Hasil Kegiatan Kolaborasi Pengabdian Masyarakat Vol. 2 No. 2 (2024): Juni : Kolaborasi : Jurnal Hasil Kegiatan Kolaborasi Pengabdian Masyarakat
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/kolaborasi.v2i2.113

Abstract

This community service program is carried out in Beji Village, East Ungaran District, which is around the Indonesian State Maritime Polytechnic campus. This activity is a continuation of the previous service roadmap in the same place where in the previous service activity, making fish food using a pellet molding machine using a petrol motor, this time making fish food using a manual fish pellet molding machine. The aim is to introduce MSME service partners to the fish cultivation group in Beji sub-district about the types of fish pellet molding machines so that they can meet fish feed needs to save production costs. The method for implementing this activity is by providing training by sharing knowledge about the parts of the fish pellet molding machine and the composition of the ingredients that make up good fish feed, followed by the practice of making fish feed using a manual pellet molding machine.
Pengaruh Quenching Terhadap Sifat Mekanik dan Struktur Mikro Baut Connecting Rod Bekas Untuk Alat Gesek FSW Ari Putranto, Wahyu; Khaeroman; Susanto; Herdawan, Deri; Noviarianto
Infotekmesin Vol 16 No 1 (2025): Infotekmesin: Januari 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i1.2531

Abstract

One method of joining soft metals such as aluminum that is widely used is Friction Stir Welding (FSW). The friction tool is a very important part of FSW. Friction tools are usually made from hardened H13 steel. This research aims to make a friction tool from steel connecting rod bolts used in marine diesel engines. The experimental methods used include FSW tool design, heat treatment of the material at a temperature of 900oC followed by a quenching process with water and salt water cooling media, then continued with material testing (chemical composition test, hardness test, and micrographic test). The test results obtained from the chemical composition test show that the connecting rod bolts include AISI 4145 steel material. The highest hardness value obtained from the connecting rod steel in the saltwater quenching process was 52.67 HRC with a martensite phase, as seen from the micrographic test. Used steel connecting rod bolts from marine diesel engines can be used as FSW friction tool material.
Pemodelan dan Ekperimental Performa Variasi Tekanan Kerja Injektor Mesin Diesel Induk Kapal terhadap Bentuk Semburan Nosel dan Temperatur Gas Buang Tiap Silinder Ari Putranto, Wahyu; Khaeroman, Khaeroman; Susanto, Susanto; Nugroho, Agung
Majalah Ilmiah Gema Maritim Vol 25 No 2 (2023): Gema Maritim Vol 25 No 2 Bulan September 2023
Publisher : Politeknik Bumi Akpelni

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37612/gema-maritim.v25i2.340

Abstract

The main diesel engine is a main propulsion engine that functions to move the ship. Diesel engines include the type of internal combustion engine (internal combustion engine). The combustion ignition process is carried out by spraying fuel into pressurised and high-temperature air due to compression. An injector is a device used to fog fuel. The purpose of this study is to obtain optimal parameters for the performance of the injector's working pressure. The methods used in this study are experimental and modelling. The data obtained are spray angle, length, time, and number of particles sprayed. The method used in this study is by testing injectors experimentally and simulating using CFD software. The injector input pressure parameters are 280, 300, and 320 bar while the nozzle diameter is 0.3 mm. The data obtained on the ship was then tested experimentally and simulated. In this study, there were 3 injector parameters tested. The test results of the three parameters on the injector obtained optimum data, namely at a working pressure of 320 bar nozzle diameter of 0.3 mm resulting in a spray angle of 14o, spray length of 100 mm with the fastest time of 0.00143 seconds to produce a speed of 69930.07 mm / s. The number of particles produced is 1.185071x103, so the fogging process is perfect (bursts evenly in all directions) and the temperature of the cylinder exhaust gas is 340-3600C.
Pelatihan Penggunaan Perangkat Lunak Design Engineering di SMA Negeri 14 Semarang Suharso, Arif Rakhman; Putranto, Wahyu Ari; Hendartono, Ario; Kholis, Nur; Artiyasa, Martina; Saleh, Noor Taufiq
Palawa: Jurnal Pengabdian Kepada Masyarakat Vol. 2 No. 1 (2023)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/palawa.v2i1.8791

Abstract

Negara dikatakan unggul tidak hanya  dari segi kekayaan sumber daya alamnya, tetapi juga dari segi ketersediaan dan keunggulan sumber daya manusia yang berkualitas. Era industri berbasis teknologi menggunakan komputer semakin menuntut kompetensi sumber daya manusia agar memiliki daya saing. Rekayasan design engineering tidak lagi dibuat secara konvensional. Kemampuan menggunakan software engineering untuk menggambar teknik menjadi ketrampilan yag bermanfaat besar. Computer-aided design atau CAD merupakan teknologi desain dan dokumentasi teknis. Metode pelatihan ini menggunakan presentasi, demonstrasi, dan praktik menggunakan CAD. Pelatihan ditargetkan pada siswa SMA N 14 Semarang yang sebelumnya belum pernah mendapat materi terkait CAD. Hasil pelatihan ini berupa model gambar. Berdasarkan observasi dan evaluasi, kegiatan ini memberikan dampak positif bagi peserta. Ketertarikan mereka pada dunia CAD muncul karena mereka melihat manfaatnya. Beberapa kendala dan tantangan ditemukan selama pelaksanaan kegiatan, dan perlu ditindaklanjuti agar kegiatan selanjutnya berjalan dengan lebih optimal.
Optimization of CNC Machining Parameters (Cutting Speed and Feed Speed) on 7075 Aluminum Material to Achieve Minimum Surface Roughness Harsono, Prijo; Suyono, Suyono; Noviarianto, Noviarianto; Putranto, Wahyu Ari
Indonesian Research Journal on Education Vol. 5 No. 6 (2025): Irje 2025
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/irje.v5i6.3671

Abstract

This study examines the optimization of CNC milling machining parameters on 7075 aluminum material to achieve minimum surface roughness through a qualitative research approach. 7075 aluminum is a high-grade aluminum alloy with superior mechanical properties that is widely used in the aviation and automotive industries. The study was conducted by analyzing the effect of cutting speed (Vc) and feed rate (f) on the surface quality of the machined results. The research method uses a qualitative descriptive approach through in-depth observation data collection techniques, structured interviews with operators and technicians, and documentation of the machining process. Research data were obtained from surface roughness measurements using a surface roughness tester (Ra) and visual analysis using machine vision techniques. The results of the analysis show that the combination of an optimal cutting speed of 300-400 m/min and a feed rate of 0.1-0.15 mm/rev produces the lowest surface roughness on 7075 aluminum material. The use of appropriate coolant and maintenance of carbide cutting tools are very significant in achieving optimal surface results. The findings of this study are expected to provide practical guidance for the manufacturing industry in optimizing the CNC machining process for 7075 aluminum material to improve product quality and productive efficiency while still considering industrial sustainability.
Co-Authors ABDUL HAMID Agung Nugroho Arif Rakhman Suharso Ario Hendartono Artiyasa, Martina Bustama, Akhirul Andra Deri Herdawan Dewa Gede Alit Astawa Erwin Sutantyo Harsono, Prijo Heri Kiswanto Indah Nurhidayati, Indah Jaya, Agil Putra Juwarlan Juwarlan Khaeroman Khaeroman Khaeroman, Khaeroman Kiswanto, Heri Kiswanto Marina Artiyasa Noor Taufiq Saleh Noviarianto, Noviarianto Nugroho, Agung Nur Kholis Nur Kholis Okpina Rochadian Prijo Harsono Prijo Harsono Priyanto, Tegar Rifki Arya Wiguna Rony, Zahara Tussoleha Saleh, Noor Taufiq Sandy Setyawan Solly Aryza Sri Tutie Rahayu Sri Tutie Rahayu SUSANTO Susanto Susanto Susanto Susanto Susanto Susanto Sutrimo SUYONO Suyono Suyono Suyono Suyono Widar Bayu Wantoro Yulius Oscar Yulius Oskar