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All Journal Acta Interna : The Journal of Internal Medicine Justitia Kodifikasia: Jurnal Penelitian Islam Media Mesin: Majalah Teknik Mesin IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) JURNAL CRANKSHAFT Pedagogia: Jurnal Ilmiah Pendidikan Dasar Indonesia Journal of Economics and Business Letters Jurnal Kesejahteraan Sosial, Komunikasi dan Administrasi Publik Fahmina Jurnal Pendidikan Islam
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STUDI EKSPERIMENTAL EFEK VARIASI DIAMETER DALAM RING MANIFOLD TERHADAP KARAKTERISTIK PERFORMA MESIN SEPEDA MOTOR 110 CC Putro, Sartono; Faishal, Afif; Subroto, Subroto; Putri, Arinda Soraya; Laksono, Singgih Ponco; Supriyanto, Bambang
JURNAL CRANKSHAFT Vol 8, No 3 (2025): Jurnal Crankshaft Vol. 8 No. 3 (2025)
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v8i3.15375

Abstract

Motor bakar internal masih menjadi sistem propulsi utama kendaraan bermotor, didukung oleh infrastruktur yang memadai, ketersediaan bahan bakar, serta kinerja operasional yang andal. Upaya peningkatan performa mesin terus dilakukan, salah satunya melalui rekayasa sistem gas buang. Penelitian ini mengkaji pengaruh variasi diameter dalam Velocity Stack Ring terhadap performa mesin sepeda motor 110 cc. Velocity Stack Ring merupakan perangkat berbentuk cincin yang dirancang untuk meningkatkan proses pembakaran dengan mempercepat aliran udara masuk ke dalam manifold buang, sehingga mampu mengurangi turbulensi aliran. Modifikasi dilakukan pada exhaust manifold dengan tiga variasi diameter internal: 15 mm, 20 mm, dan 25 mm. Evaluasi kinerja meliputi torsi, daya, dan konsumsi bahan bakar spesifik, melalui pengujian eksperimental menggunakan alat uji Dynotest. Hasil penelitian menunjukkan bahwa variasi diameter Velocity Stack Ring memberikan pengaruh signifikan terhadap performa mesin. Torsi tertinggi diperoleh pada variasi 15 mm sebesar 6,93 Nm pada 5618 rpm, meningkat dari kondisi standar sebesar 6,23 Nm pada 5750 rpm. Daya maksimum dicapai pada diameter 20 mm sebesar 6,4 hp pada 7206 rpm, lebih tinggi dibandingkan daya standar sebesar 5,6 hp pada 6982 rpm. Sementara itu, nilai konsumsi bahan bakar spesifik (SFC) terendah tetap diperoleh pada kondisi standar, yaitu 0,127 kg/hp.jam, dibandingkan dengan nilai 0,143 kg/hp.jam pada penggunaan diameter 20 mm. Dengan demikian, modifikasi Velocity Stack Ring terbukti mampu meningkatkan performa mesin, terutama dalam hal daya dan torsi, meskipun disertai peningkatan konsumsi bahan bakar.
Religious Moderation In Akidah Akhlak Teaching Materials At The Madrasah Aliyah Usman, Usman; Subroto, Subroto; Al-Husna, Khofifah Indah; Aman, Aman; Siregar, Mulatua
Fahmina: Jurnal Pendidikan Islam Vol 1, No 1 (2023)
Publisher : UIN SYEKH ALI HASAN AHMAD ADDARY PADANGSIDIMPUAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/fahmina.v1i1.10086

Abstract

Religious moderation is a topic of discussion that is widely discussed today considering the emergency cases of intolerance and radicalism in public life, especially in the world of education. Textbooks are certainly considered important as a form of character and personality formation that must support anti-radicalism and tolerance. Therefore, in writing this article, we will discuss the description of the moral creed textbook class X curriculum 2013 and describe the content of religious moderation values in the moral creed textbook class X curriculum 2013. This research is classified as library research with a qualitative approach. Data collection methods are used through documentation methods, and data is analyzed through Content analysis (content analysis). That is by linking religious moderation indicators to class X Akidah Akhlak textbooks at the Madrasah Aliyah level published by the Ministry of Religious Affairs. The result of this research is that there are several parts in each chapter of discussion, including: pearls of wisdom, perception, deepening of the material, student activities, attitude scales, summaries, final chapter assessments, case studies and exemplary stories. The content of religious moderation values contained in the Bina Akidah Akhlak KMA 2019 textbook for Madrasah Aliyah Class X is in accordance with the four basic values of religious moderation that must be instilled in the world of education, namely Tasamuh, 'Adalah, Tawazun and equality.
Peningkatan Aktivitas dan Hasil Belajar Pendidikan Jasmani dan Kesehatan melalui Metode Course Reivew Horay pada Siswa kelas VI SD Negeri 2 Natar Lampung Selatan Tahun Pelajaran 2019/2020 Subroto, Subroto
Pedagogia: Jurnal Ilmiah Pendidikan Dasar Indonesia Vol. 4 No. 1 (2022): Pedagogia
Publisher : Program Studi PGSD, Jurusan Ilmu Pendidikan, STKIP PGRI Bandar Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52217/pedagogia.v4i1.778

Abstract

The purpose of this study is to increase activities and learning outcomes of Physical Education through the course review method for Class VI students of SD Negeri 2 Natar, Natar District, South Lampung, for the 2019/2020 academic year. CAR research method in 3 learning cycles, each consisting of planning, action, observation, reflection. This research was conducted at SD Negeri 2 Natar, South Lampung, in the odd semester of the 2019/2020 academic year. The research data was taken from observing the activities and learning outcomes of students and colleagues. Cycle I learning outcomes 61%, learning activities 62%, cycle II learning outcomes increased to 73% and Activities 81%, cycle III learning outcomes increased to 82%, learning activities 85%. Conclusion The use of the Course Review Horay (CRH) model can improve activities and learning outcomes of Physical Education in Class VI students of SD Negeri 2 Natar South Lampung 2019/2020.
Culture, leadership, and performance management as drivers of employee work ethic: Evidence from Indonesia Eximbank (LPEI) Jakarta Subroto, Subroto
Journal of Economics and Business Letters Vol. 4 No. 3 (2024): June 2024
Publisher : Privietlab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55942/jebl.v4i3.986

Abstract

This study investigates whether organizational culture, leadership, and performance management jointly shape employee work ethic in a policy-bank context. Drawing on Lembaga Pembiayaan Ekspor Indonesia’s (LPEI) TRUST cultural code and its competency-based HR architecture, we conducted a cross-sectional survey of Jakarta-based staff and structural-position employees using five-point Likert measures aligned to validated constructs (Competing Values Framework for culture, transformational/contingent-reward behaviors for leadership, continuous-system indicators for performance management, and MWEP facets for work ethic). Instrument screening indicated acceptable validity and reliability (α≈0.81 culture; 0.90 leadership; 0.70 performance management; 0.79 work ethic), consistent with recommended thresholds for organizational measures. Descriptively, respondents reported strong culture, leader behaviors, performance routines, and work-ethic profiles—especially on integrity, time discipline, and diligence—consistent with the theory that values and competencies have been institutionalized in daily operations. Bivariate associations between the three predictors and work ethic were positive but small and not statistically significant at α=0.05, a pattern plausibly explained by restricted variance from high institutional baselines, some indicator attenuation, and single-time-point design. Substantively, the direction of effects supports the theoretical model linking culture, leadership, and continuous performance management to work-ethic behaviors in export-finance settings. We outline actionable refinements—greater role-appropriate delegation, behaviorally anchored PM indicators tied to CBHRM proficiency levels, and unit-level problem-solving forums—and recommend future multi-unit or longitudinal designs (and/or latent-variable models) to recover true effects that current ceiling levels may mask.
Co-Authors Afif Faishal Al-Husna, Khofifah Indah Aman Aman Arinda Soraya Putri Aris Tri Handoko, Aris Tri Bambang Supriyanto Binyamin Binyamin Binyamin Binyamin, Binyamin Dwi Prastiyo, Dwi Eddy Ibrahim Eko Budiono Fajar Tri Yunianto, Fajar Tri Hartanto, Aris Laksono, Singgih Ponco Marwan Effendy MKR, Andrew MUHAMMAD SAID Nurmuntaha Agung Nugraha Poedji Loekitowati Hariani Pusaka, Semerdanta Rachman, Abidin Saputro, Nurhadi Sarjito - Sartono Putro Shodiqin Shodiqin, Shodiqin Siregar, Mulatua Sumardi . Sunardi Wiyono Tri Tjahjono Triyanto, Joko Usman Usman