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All Journal Jurnal Teknik Mesin Mekanika: Majalah Ilmiah Mekanika Jurnal Pelayanan dan Pengabdian Masyarakat Indonesia Cakrawala: Jurnal Pengabdian Masyarakat Global Jurnal Penelitian Rumpun Ilmu Teknik Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Mars: Jurnal Teknik Mesin, Industri, Elektro dan Ilmu Komputer Panggung Kebaikan : Jurnal Pengabdian Sosial Jurnal Pendidikan Teknik Mesin
Ruben Bayu Kristiawan
Department Of Mechanical Engineering, Faculty Of Engineering, Universitas Negeri Semarang, Semarang 50229, Central Java, Indonesia
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Physics Social Sciences

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Penguatan Kapasitas dan Legalitas Kelompok Ternak melalui Pelatihan Manajemen dan Teknologi Mesin Tepat Guna di Desa Sroyo, Kecamatan Jaten, Kabupaten Karanganyar Ruben Bayu Kristiawan; Khoirul Huda; Ganjar Pramudi; Irfan Hafiz Firmansyah; Shahnaz Galuh Permadani; Andika Wibisana Arismunandar; Alfan Surya Herlambang
Jurnal Pelayanan dan Pengabdian Masyarakat Indonesia Vol. 5 No. 3 (2026): September : Jurnal Pelayanan dan Pengabdian Masyarakat Indonesia
Publisher : Sekolah Tinggi Ilmu Administrasi Yappi Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jppmi.v5i3.2978

Abstract

This community service program aimed to strengthen the production capacity, business management, and institutional legality of the Kampung Ngelom Livestock Farmer Group in Sroyo Village, Jaten District, Karanganyar Regency, through the adoption of appropriate technology and managerial assistance. The program employed a participatory-technocratic approach consisting of five stages: socialization and needs assessment, training, technology implementation, mentoring and evaluation, and sustainability strengthening. Key interventions included the introduction of forage-chopping and feed-mixing machines, the implementation of a simple digital bookkeeping application, training in feed processing and preservation, livestock health education, and strengthening of institutional governance and legal compliance. Preliminary results indicated that feed-processing time decreased from 2–3 hours to approximately 1 hour per day, representing a 50–60% improvement in processing efficiency. Processing capacity also increased to approximately 100 kg per hour, accompanied by improved feed-mixing homogeneity. In terms of business management, approximately 30% of group members had begun using the bookkeeping application, while managerial knowledge increased by approximately 30%. Nevertheless, further assistance is required to achieve the targeted level of adoption and capacity development.
Keropos Lokal sebagai Cacat Penampang Kritis: Bukti Eksperimental Kapasitas Aksial dan Lokalisasi Keruntuhan Kolom Beton Bertulang Faizal Romyta Sydore; Fahrudin Fahrudin; Teguh Prayitno; Nurul Yuhanafia; Ruben Bayu Kristiawan; Johan Lautan Wijaya Nusantara
Jurnal Penelitian Rumpun Ilmu Teknik Vol. 5 No. 4 (2026): Jurnal Penelitian Rumpun Ilmu Teknik
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/juprit.v5i4.7144

Abstract

This study evaluates axial capacity and failure localization in reinforced concrete columns with a controlled local cross-sectional reduction used as a model of honeycombing. Eight 125 × 125 × 750 mm columns were loaded in nominally concentric compression at 28 days: two intact controls and two specimens each with a defect at the support (K0), quarter height (K1/4), and midheight (K1/2). The 40 mm-high defect removed 387.84 cm³, equivalent to 3.31% of the gross column volume, and left a 77 × 77 mm section, corresponding to a 62.05% local area loss. Mean maximum loads for N, K0, K1/4, and K1/2 were 389.44, 250.14, 217.37, and 220.87 kN, respectively. The reductions relative to N were 35.77%, 44.19%, and 43.29%. N and K0 shared the first batch, whereas K1/4 and K1/2 shared the second batch, whose mean cylinder strength was lower (19.15 versus 24.41 MPa). Thus, the latter two reductions combine defect and batch differences. Within the second batch, K1/4 and K1/2 differed by 1.61% in mean load. Failure localized at the reduced section in all defective specimens. The contribution is a descriptive comparison of controlled defect locations and failure patterns; two replicates per group, batch differences, and regular defect geometry limit causal inference and application to field honeycombing.
Peningkatan Kompetensi Praktik Pengecoran Logam Limbah Aluminium dengan Tungku dan Kowi UNNES di SMK Negeri 2 Kendal Rusiyanto Rusiyanto; Rahmat Doni Widodo; Wara Dyah Pita Rengga; Ruben Bayu Kristiawan; Akmal Hanif Zein; M. Candra Akmalunsyah; Ilham Adi Wijaya; Kaleb Priyanto; Martha Budianto
Cakrawala: Jurnal Pengabdian Masyarakat Global Vol. 5 No. 4 (2026): November: Cakrawala: Jurnal Pengabdian Masyarakat Global
Publisher : Universitas 45 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30640/cakrawala.v5i4.8240

Abstract

Automotive (Light Vehicle Engineering) practice at SMK Negeri 2 Kendal generates aluminium offcuts that accumulate unused, and the school had no facility for metal-casting practice. This community service program aimed to improve students' non-ferrous casting competence by using aluminium scrap, an LPG-fired furnace, and crucibles made from evaporation-boat waste developed at Universitas Negeri Semarang (UNNES). The program followed five stages: socialization, technology preparation, training, mentoring, and evaluation. The main session was held on 29 September 2026 with 33 of 35 enrolled students. It comprised a pretest, a theory lecture, a demonstration of furnace and burner operation with occupational safety, sand-mould making, aluminium melting and pouring, shake-out, and a posttest. Mean knowledge scores rose from 29.9 to 71.1 (4.48 to 10.67 correct answers out of 15), with a mean normalized gain of 0.58 (medium). A paired t-test confirmed a significant increase (t(32) = 19.08; p < 0.001), and every participant improved. However, only 48.5% of participants reached a score of 70 or higher. The program also handed a set of casting equipment over to the school and produced a signed Implementation Arrangement between UNNES and the school. It offers a model for vocational learning that links manufacturing skills with material recycling.
Co-Authors Ainun Athar, Muhammad Akmal Hanif Zein Alfan Surya Herlambang Andika Wibisana Arismunandar Athanasius Priharyoto Bayuseno Athanasius Priharyoto Bayuseno Cahyanto, Septian Eko Dhiaulhaque Dzikra Adi Pratama Enita, Sarai Esa Nur Shohih Fahrudin Fahrudin Faizal Romyta Sydore Fatkhu Amanulloh Galih Tri Laksono Ganjar Pramudi Gojandra, Farda Pega Libra gunagung syahrul nizam sulkan Haikal Haikal Hibban Pasya Hafid Ilham Adi Wijaya Irfan Hafiz Firmansyah Jamari Jamari Johan Lautan Wijaya Nusantara Julivan Brian Womsiwor Kaleb Priyanto Khoirul Huda Khoirul Huda Khoirul Huda Komar Roni Krisna Tri Prasojo Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto Kriswanto, Kriswanto M. Candra Akmalunsyah Martha Budianto Mohd Syahmi Jamaludin Muhamad Reza Wahyu Prasetyo Muhammad Emir Al Hakim Muhammad Khumaedi Muhammad Zakky Mubarok Ninda Kurniadi Nurul Yuhanafia Pramudi, Ganjar Priyanto, Kaleb Putra, Fajar Waskhita Rahmat Doni Widodo Rusiyanto Rusiyanto Rusiyanto Rusiyanto, Rusiyanto Setyo Bhahak Fendi Baihaqi Shahnaz Galuh Permadani Tegar Oki Prasdika Teguh Prayitno TriLaksono, Galih Wara Dyah Pita Rengga Yudistira Rijal Andika