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All Journal Rekayasa Mesin Mesin International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Jurnal Kepariwisataan International Journal of Aviation Science and Engineering Jurnal Nasional Aplikasi Mekatronika, Otomasi dan Robot Industri (AMORI) Journal of Social Research Jurnal Ilmiah MEA (Manajemen, Ekonomi, dan Akuntansi) BINA CIPTA Prosiding SNTTM Indonesian Journal of Aerospace
Leonardo Gunawan, Leonardo
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Social Sciences Transportation Other

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PENGARUH PERSONA MEREK TERHADAP EKUITAS MEREK DAN MINAT BELI KONSUMEN GENERASI Z DI RESTORAN DAN CAFÉ DI KOTA SURABAYA Gunawan, Leonardo; Assaf, Rizka Aula
Jurnal Ilmiah Manajemen, Ekonomi, & Akuntansi (MEA) Vol 8 No 2 (2024): Edisi Mei - Agustus 2024
Publisher : LPPM STIE Muhammadiah Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31955/mea.v8i2.4073

Abstract

Generasi Z memiliki peranan penting dalam konsumsi industri makanan dan minuman menimbang generasi ini akan menjadi potensi umur produktif yang besar di beberapa tahun yang akan mendatang dan potensial bagi bisnis. Namun, penelitian dengan topik brand personality, brand equity, dan buying intention belum popular dan diteliti secara spesifik dengan objek generasi Z. Padahal, secara teori generasi, mereka memiliki karakteristik yang berbeda dengan generasi pendahulunya. Maka dari itu, peneliti akan mengkaji pengaruh Brand Personality terhadap Brand Equity, dan Minat Beli Konsumen Generasi Z di Industri Food & Beverage Indonesia. Metode penelitian ini menggunakan metode kuantitatif multivariat dan menggunakan aplikasi SMART-PLS. Peneliti mengolah 98 data kuesioner utama dengan sampel konsumen Gen Z dengan rentang kelahiran 1997-2006 dan pernah membeli produk makanan dan minuman di restoran atau Café di Surabaya dalam rentang waktu setahun terakhir. Hasil penelitian mengungkapkan hasil yang positif dan signifikan antara Brand Personality terhadap Brand Equity, Brand Equity terhadap Purchase Intention, dan Brand Personality terhadap Purchase Intention.
REVIEW ON RAMS ANALYSIS FOR RAILWAY VEHICLES WITH POTENTIAL APPLICATION IN RAILWAY SYSTEM OF INDONESIA Muzakki, Sofyan; Gunawan, Leonardo; Rachman Setiawan; Kariem, M. Agus
Jurnal Rekayasa Mesin Vol. 15 No. 3 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i3.1781

Abstract

Railway vehicles are critical for ensuring the reliability and safety of trains, and their complexity has grown with technological advancements. RAMS analysis (Reliability, Availability, Maintainability, and Safety) has become a popular method for assessing the functional requirements of these vehicles. This review specifically investigates RAMS analysis for railway vehicles, aiming to identify trends, developments, key research challenges, and potential application in railway system of Indonesia. By thoroughly reviewing relevant articles, it explores various aspects of RAMS analysis, conducts comparative analyses, discusses potential research directions, and highlights advancements and usage in railway vehicle contexts. The methodology involves formulating research questions, searching the Scopus database for records, and applying assessment criteria to select eligible articles. Results reveal recent developments, distribution of articles, and studies focusing on reliability, availability, maintainability, and safety. This review offers valuable insights into the current state of RAMS analysis for railway vehicles and guides future research and development in this area.
MECHANICAL ANISOTROPY OF COLD-ROLLED ST-37 STEEL PLATE UNDER HIGH STRAIN RATES LOADINGS Perkasa, Rilis Eka; Gunawan, Leonardo; Santosa, Sigit Puji; Afdhal, Afdhal
International Journal of Mechanical Engineering Technologies and Applications Vol. 4 No. 2 (2023)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2023.004.02.9

Abstract

Cold rolling process in metal could increase its strength and hardness, but also induces mechanical anisotropy. This is caused by unresolved plastic strain and microstructural changes caused by plastic deformation exerted by pair of rolls at a relatively low temperature. This research aims to provide understandings on anisotropic and strain rate sensitive behaviour of St-37 mild steel. The microstructure of rolled and unrolled St-37 plate were observed in 3 directions relative to the rolling direction. The cylindrical specimens were then prepared from rolled plate with 33.3% reduction in the orientation of 0o, 45o, and 90o relative to the rolling direction. Specimens were also prepared from unrolled plate as comparison in the same directions. These specimens were then tested in compression loading, first in quasi-static condition, and then by using Split-Hopkinson Pressure Bar (SHPB) at the strain rate of 1200 s-1. The experimental results in the form of stress-strain curves are used to obtain the parameters of Simplified Johnson-Cook viscoplastic model. The anisotropy of yield strength in rolled specimens could be seen on both quasi-static and high strain rate condition, where the highest strength found on the specimens perpendicular to the rolling direction. In addition, the effect of cold rolling to the strain rate sensitivity of the material were also captured successfully in this study, where specimens from rolled plate show less strain rate sensitivity compared to the unrolled specimens.
A Corotational Formulation For Geometrically Nonlinear Dynamics of 2D Flexible Beams Andria, Novi; Zuhal, Lavi Rizki; Muhammad, Hari; Gunawan, Leonardo
Indonesian Journal of Aerospace Vol. 22 No. 2 (2024): Indonesian Journal Of Aerospace
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/ijoa.2024.8949

Abstract

A simple and efficient 2D corotational formulation for dynamic analysis of geometrically nonlinear flexible beam is presented in this paper. The corotational approach can easily facilitate the evaluation of internal elactic forces by introducing an element frame to separate rigid body motion and the deformational part. In the present study, the Euler-Bernoulli beam models with simple geometric stiffness matrix is employed and Newmark’s implicit time-stepping scheme with iterative predictor-corrector algorithm is adopted. The validity and efficiency of the present corotational formulation are verified by simulating three numerical examples. Despite its simple numerical implementation, simulation results confirms that the proposed formulation is highly accurate and efficient in simulating flexible beams undergoing large deformation.
METODA COROTATIONAL BEAM 2D UNTUK ANALISIS STATIK STRUKTUR NONLINIER GEOMETRIK Andria, Novi; Zuhal, Lavi R.; Gunawan, Leonardo; Muhammad, Hari
Indonesian Journal of Aerospace Vol. 17 No. 1 Juni (2019): Jurnal Teknologi Dirgantara
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/j.jtd.2019.v17.a3117

Abstract

Makalah ini membahas sebuah metoda corotational beam dua dimensi (CBM 2D) yang dapat digunakan untuk analisis statik struktur yang nonlinier secara geometri. Kombinasi antara formulasi corotational beam dan Euler-Bernouli beam Theory (EBT) membuat implementasi numerik metoda ini menjadi sangat sederhana dengan beban komputasi yang rendah sehingga sangat praktis untuk diaplikasikan. Akurasi dan efisiensi metoda ini terverifikasi melalui beberapa uji numerik yang dilakukan pada beberapa model uji yang terdapat pada literatur. Metoda ini pun mampu memberikan hasil yang akurat untuk kasus extensible beam dan struktur beam yang dibebani follower load. Hasil penelitian ini memverifikasi validitas, efisiensi, dan kepraktisan dari metoda yang dikembangkan.
PELATIHAN PUBLIC SPEAKING DALAM EVENT OLEH POLITEKNIK INTERNASIONAL BALI Gunawan, Leonardo; Christianto, Jery; Prakoso, Ganang Aditiyo
BINA CIPTA Vol 4 No 2 (2025): BINA CIPTA
Publisher : Politeknik Internasional Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46837/binacipta.v4i2.78

Abstract

Pelatihan Public speaking dalam Event yang diselenggarakan oleh Politeknik Internasional Bali (PIB) bertujuan untuk meningkatkan keterampilan komunikasi publik masyarakat, khususnya dalam konteks penyelenggaraan acara. Kegiatan ini dilaksanakan secara daring pada 9 Mei 2025 melalui platform Zoom, dengan melibatkan 55 peserta dari berbagai wilayah di Indonesia. Metode pelatihan mencakup sesi teori, praktik, dan diskusi interaktif. Hasil evaluasi menunjukkan peningkatan signifikan dalam pemahaman peserta mengenai teknik public speaking, seperti struktur pidato, vocal delivery, dan penggunaan bahasa tubuh. Survei kepuasan peserta mencatat nilai rata-rata 4,7/5,0 untuk materi dan pembawaan, serta 4,4/5,0 untuk waktu penyelenggaraan. Kegiatan ini tidak hanya mendukung pelaksanaan Tridharma Perguruan Tinggi tetapi juga membuka peluang kerja sama berkelanjutan antara PIB dan Masyarakat.
Railway track width gauge performance review: evaluation of test results and their implications for safety improvement Prasetyo, Febrian Angga; Sunarto, Setio Aji; Suprijanto, Suprijanto; Gunawan, Leonardo
Jurnal Nasional Aplikasi Mekatronika, Otomasi dan Robot Industri (AMORI) Vol. 3 No. 1 (2024): July
Publisher : Faculty of Vocational Studies - Research Center, DRPM ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The deteriorated state of the railway line poses operational risks for railway transportation due to potential safety concerns. The train derailment occurred because of an abnormal track width that was not immediately repaired. This improvement was omitted because of the absence of an accurate and real-time track width measurement tool. Several gauge have been widely developed. The measuring instrument developed uses an LMP (Linear Motion Position) sensor to measure the width of the path. The measuring mechanism connects the LMP shaft to a roller bearing arm that can move linearly and dynamically according to the groove width of the path. The linear movement of the roller bearing with the arm connected to the LMP shaft is converted as a change in the path width. To determine the function and measurement results of the measuring instrument, measurement experiments were conducted at Sidotopo stations (lines 5 and 6). Line 5 was chosen because of the straight area of the money order needle, the parallel crossing groove, and the curve. Line 6 was chosen because there is a gongsol path. Measurements on each path are made twice with the starting point and opposite direction. The measurement data are shown in the form of a width graph to the distance with one red line as the tolerance limit for widening the width of the line (1074 mm) and one blue line as the tolerance limit for narrowing the width of the line (1065 mm). The measurement results show the consistency of the measurement results. The largest measured width condition is 1092 mm, and the smallest measured width condition is 1058 mm.
Co-Authors Adhy Sasongko, Rianto Afdhal Afdhal Agung, Rizqy Akbar, Mahesa Annisa Jusuf, Annisa Assaf, Rizka Aula Dimas, Agustinus Eko Poetro, Ridanto Hari Muhammad Jarwadi, Maulana Hayu Jery christianto Kariem, M. Agus Kusni, Muhammad Lavi Rizki Zuhal Muzakki, Sofyan Nhat Vu, Nguyen Van Novi Andria, Novi Palar, Pramudita Satria Perkasa, Rilis Eka Prakoso, Ganang Aditiyo Prasetyo, Febrian Angga Prasetyo, Febrian Angga Putra, Ichsan Setya Rachman Setiawan Santosa, Sigit P Santosa, Sigit Puji Santosa, Sigit Puji Sunarto, Setio Aji Suprijanto Suprijanto Tam, Le Hoai Tatacipta Dirgantara, Tatacipta Zuhal, Lavi R.