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All Journal Jurnal Teknik ITS International Research Journal of Business Studies (E-Journal) Humanism : Jurnal Pengabdian Masyarakat Makara Journal of Technology Journal of Manufacturing in Industrial Engineering & Technology Indonesian Journal of Maritime Technology or abbreviated (ISMATECH) International Research Journal of Business Studies
Mochamad Zaed Yuliadi
Universitas Muhammadiyah Surabaya
Religion Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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Analisa Pengaruh Variasi Sudut Bevel Akibat Kombinasi Pengelasan Fcaw dan SMAW terhadap Kekuatan Impact Butt Joint pada Spesimen Pipa Api 5l Grade X42 Rizkiyah Ramadani; Herman Pratikno; Moch. Zaed Yuliadi
Jurnal Teknik ITS Vol 5, No 2 (2016)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (325.568 KB) | DOI: 10.12962/j23373539.v5i2.18650

Abstract

Kekuatan sambungan las pada suatu konstruksi perlu diperhatikan dengan baik dan pengujian pun perlu dilakukan untuk mengetahui ketahanan bahan terhadap suatu beban. Dalam penelitian tugas akhir ini bertujuan untuk mengetahui pengaruh sudut bevel dan kondisi optimal akibat  kombinasi pengelasan FCAW dan SMAW terhadap kekuatan impact butt joint pada material pipa API 5L grade X42. Variasi sudut bevel yang digunakan adalah 60o, 40o, dan 0o. Pengujian impact merupakan suatu upaya untuk mensimulasikan kondisi operasi material yang sering ditemui dalam perlengkapan transportasi atau konstruksi dimana beban tidak selamanya terjadi secara perlahan-lahan melainkan datang secara tiba-tiba, khususnya dalam konstruksi bangunan lepas pantai dimana beban secara tiba – tiba sangat memungkinkan untuk terjadi. Dari hasil penelitian yang dilakukan didapatkan bahwa  nilai kekuatan impact pada sudut bevel 60o di bagian weld adalah sebesar 2.01 J/mm2 dan bagian HAZ sebesar 2.08  J/mm2. Sudut bevel 40o memiliki nilai pada bagian weld sebesar 2.10 J/mm2 dan bagian HAZ sebesar 2.13  J/mm2. Namun memiliki pengaruh yang jauh berbeda dengan sudut bevel 0o yaitu memiliki nilai impact sebesar 1.72 J/mm2 untuk bagian weld dan 1.13 J/mm2 untuk bagian HAZ . Kondisi optimal pengaruh sudut bevel terhadap kekutan impact adalah sudut 40o . Hal ini dikarenakan persentase ferrite metalografi struktur mikronya lebih banyak dibandingkan dengan sudut bevel 60o dan 0o dan juga memiliki nilai kekerasan yang rendah sehingga bersifat ulet menyebabkan nilai impact-nya lebih unggul. Selain itu efisensi dalam segi penghematan waktu kerja, perkerja maupun biaya produksi lebih baik.
Strategi Produktivitas Tenaga Kerja Dan Daya Saing Studi Kasus Galangan Kapal Kawasan Pulau Batam Dan Jawa Bagiyo Suwasono; Sjarief Widjaja; Ahmad Zubaydi; M. Zaed Yuliadi
INTERNATIONAL RESEARCH JOURNAL OF BUSINESS STUDIES Vol 3, No 2 (2010): August-November 2010
Publisher : Universitas Prasetiya Mulya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21632/irjbs.3.2.53

Abstract

The strength of international competitiveness encouraged a shipyard to reduce cost of materials and labor. Therefore, a shipyard did a measurement to improve the rationalization toward labor productivity. This study aimed to compare the path model from strategies of labor productivity and competitiveness of medium size shipyard in region of Batam and Java. The normality test of questionnaire data at 200 respondents who are competent in the feld of shipbuilding through the ratio of skewness and kurtosis did not show normal distribution from the data. Test of model feasibility through PLS algorithm and bootstrapping showed moderate criterion and no signifcant diference in the variable path for both regions. The frst latent variable: shipyard competitiveness is infuenced by the strategic policy and labor productivity, while the second latent variable: labor productivity is infuenced by work activity, strategic policy, and corporate culture. Test of model segmentation through FIMIX-PLS showed good criterion and osignifcant diference in the interaction of variable heterogeneity for both regions. The fnal result of shipyards PLS path modeling showed a consistent relationship between strategic policy and labor productivity in order to increase the Indonesian shipyard competitiveness.
Development of Technology Parameter Towards Shipbuilding Productivity Predictor Using Cubic Spline Approach Suwasono, Bagiyo; Widjaja, Sjarief; Zubaydi, Achmad; Yuliadi, Zaed; Budiantara, I Nyoman
Makara Journal of Technology Vol. 14, No. 2
Publisher : UI Scholars Hub

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

Abstract

Development of Technology Parameter Towards Shipbuilding Productivity Predictor Using Cubic Spline Approach. Ability of production processes associated with state-of-the-art technology, which allows the shipbuilding, is customized with modern equipment. It will give impact to level of productivity and competitiveness. This study proposes a nonparametric regression cubic spline approach with 1 knot, 2 knots, and 3 knots. The application programs Tibco Spotfire S+ showed that a cubic spline with 2 knots (4.25 and 4.50) gave the best result with the value of GCV = 56.21556, and R2 = 94.03%.Estimation result of cubic spline with 2 knots for the PT. Batamec shipyard = 35.61 MH/CGT, PT. Dok & Perkapalan Surabaya = 27.49 MH/CGT, PT. Karimun Sembawang Shipyard = 27.49 MH/CGT, and PT. PAL Indonesia = 19.89 MH/CGT.
Ship Design Based on Extreme Waves Imawan Santosa, Pramudya; Zaed Yuliadi, Mochamad; Fajar, Achmad; Suardi, Suardi; Ayu Nastiti, Yulia; Pranatal, Erifiive
Indonesian Journal of Maritime Technology Vol. 3 No. 1 (2025): Volume 3 Issue 1, June 2025
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v3i1.8481353

Abstract

Recent studies have revealed that extreme waves (also known as freak waves), with heights ranging from 20 to 30 meters, occur more frequently than previously assumed. Over the past decades, numerous large commercial vessels have been lost due to incidents involving such anomalous wave phenomena. However, the current design criteria outlined in the 2022 BKI (Biro Klasifikasi Indonesia) Consolidation still consider significant wave heights of less than 11 meters, which is increasingly recognized as inadequate for modern oceanic conditions. This study aims to evaluate and propose ship design parameters that account for extreme wave conditions by incorporating significant wave heights of up to 30 meters into the safety analysis. The methodology involves a comparative analysis between the conventional design standards and a revised model that integrates dynamic wave impact forces as a crucial factor in determining the structural dimensions and stability of ships. The findings indicate that designing ships with consideration of extreme wave scenarios is not only feasible but also necessary to enhance vessel resilience and reduce the risk of capsizing and sinking. This research underscores the urgent need for updating maritime safety regulations and design frameworks in response to evolving oceanographic realities, thereby contributing to the development of safer and more robust marine transportation systems.
Carbon Capture Storage System on the Ship Imawan Santosa, Pramudya; Erifive, Pranata; Suardi, Suardi; Zaed Yuliadi, Mochamad; Pradityana, Atria; Ayu Nastiti, Yulia
Indonesian Journal of Maritime Technology Vol. 3 No. 1 (2025): Volume 3 Issue 1, June 2025
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v3i1.8481354

Abstract

Carbon Capture and Storage (CCS) is one of the global warming mitigation technology systems by reducing CO2 emissions into the atmosphere. This system is a series of implementations of processes that are related to each other, starting from the separation and capture of CO2 from the source of exhaust emissions (flue gas), transportation of captured CO2 to storage (transportation), and storage to a safe place (storage). If these emissions are released in large quantities, it will certainly cause various problems such as Global Warming. In the maritime transportation sector, one of the emissions that is widely produced by ships is exhaust gas from the ship's main engine when operating which is released into the atmosphere through the Funnel (chimney). One method that can be done is to separate carbon dioxide gas (CO2) contained in the exhaust gas with Membrane Technology placed on the Funnel. Technical analyzes is done by testing the vessel model then the results are developed with naval theories. This article will discuss how to filter carbon dioxide gas and membrane technology that can be used on ships.
Strategi Produktivitas Tenaga Kerja dan Daya Saing: Studi Kasus Galangan Kapal Kawasan Pulau Batam dan Jawa Suwasono, Bagiyo; Widjaja, Sjarief; Zubaydi, Ahmad; Yuliadi, M. Zaed
International Research Journal of Business Studies Vol. 3 No. 2 (2010): August-November 2010
Publisher : Universitas Prasetiya Mulya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21632/

Abstract

The strength of international competitiveness encouraged a shipyard to reduce cost of materials and labor. Therefore, a shipyard did a measurement to improve the rationalization toward labor productivity. This study aimed to compare the path model from strategies of labor productivity and competitiveness of medium size shipyard in region of Batam and Java. The normality test of questionnaire data at 200 respondents who are competent in the field of shipbuilding through the ratio of skewness and kurtosis did not show normal distribution from the data. Test of model feasibility through PLS algorithm and bootstrapping showed moderate criterion and no significant difference in the variable path for both regions. The first latent variable: shipyard competitiveness is influenced by the strategic policy and labor productivity, while the second latent variable: labor productivity is influenced by work activity, strategic policy, and corporate culture. Test of model segmentation through FIMIX-PLS showed good criterion and no significant difference in the interaction of variable heterogeneity for both regions. The final result of shipyards PLS path modeling showed a consistent relationship between strategic policy and labor productivity in order to increase the Indonesian shipyard competitiveness.
Analisis Efektivitas Penggunaan Ukuran Nozzle Spray Berbeda Pada Pengecatan Material Plat Mochamad Zaed Yuliadi; winda amalia herdianti; Daffa Ikzaz Faiz
Journal of Manufacturing in Industrial Engineering & Technology Vol 5 No 1 (2026): Vol 5 No 1 (2026): Journal of Manufacturing in Industrial Engineering & Technolog
Publisher : Universitas Muhammadiyah Surabaya Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/mine-tech.v5i1.31493

Abstract

Pengecatan merupakan salah satu proses penting dalam industri perkapalan dan manufaktur guna memberikan  perlindungan terhadap korosi serta meningkatkan estetika permukaan logam. Salah satu metode pengecatan yang umum digunakan adalah airless spray, yang memiliki keunggulan dalam hal kecepatan dan ketebalan lapisan yang seragam. Salah satu faktor yang memengaruhi hasil pengecatan adalah ukuran nozzle, yang berperan dalam menentukan pola semprot dan volume cat yang dikeluarkan, sehingga memengaruhi ketebalan lapisan cat kering atau Dry Film Thickness (DFT). Penelitian ini bertujuan untuk menganalisis efektivitas penggunaan berbagai ukuran nozzle terhadap hasil DFT pada pengecatan plat baja. Metode yang digunakan adalah eksperimen langsung dengan menggunakan airless spray dan variasi ukuran nozzle. Setiap pengecatan dilakukan dalam kondisi tekanan, jarak semprot, jenis cat, dan metode aplikasi yang sama. Pengukuran DFT dilakukan menggunakan alat Elcometer di beberapa titik per plat, lalu dihitung nilai rata-rata DFT dari tiap ukuran nozzle. Hasil penelitian menunjukkan bahwa ukuran nozzle berpengaruh signifikan terhadap hasil DFT. Penelitian ini diharapkan dapat memberikan gambaran mengenai pemilihan ukuran Nozzle yang paling sesuai dengan standar spesifikasi 15-25 μm. Dari hasil penelitian ini didapatkan hasil paling optimal dan efisien ialah ukuran pada ukuran nozzle 823, maka dilakukan perhitungnan kebutuhan cat yaitu 1,02 liter dengan biaya cat nya ialah Rp 153.000.Dengan demikian, pemilihan ukuran nozzle yang tepat dapat meningkatkan kualitas pengecatan sekaligus mengoptimalkan penggunaan material cat.
OPTIMALISASI EDUKASI MP-ASI DAN PEMBERDAYAAN EKONOMI WARGA DALAM MENDUKUNG PENCEGAHAN STUNTING DI DESA TANJUNG PADEMAWU PAMEKASAN Pipit Festi Wiliyanarti; Zakiyah Yasin; Mochamad Zaed Yuliadi; Yuanita Wulandari; Vika Ramadhana Fitriyani; Nur Aini; Muhammad Fausi
Humanism : Jurnal Pengabdian Masyarakat Vol 7 No 2 (2026): Agustus
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/hm.v7i2.33673

Abstract

Stunting masih menjadi masalah kesehatan masyarakat yang erat kaitannya dengan rendahnya literasi gizi dan keterbatasan ekonomi keluarga. Kegiatan ini bertujuan untuk mengukur dan menganalisis efektivitas edukasi Makanan Pendamping ASI (MP-ASI) serta program pemberdayaan ekonomi warga sebagai upaya pencegahan stunting yang terintegrasi di Desa Tanjung, Kabupaten Pamekasan. Metode yang digunakan adalah Participatory Action Research (PAR) yang melibatkan pendampingan, penyuluhan gizi, pelatihan produksi MP-ASI berbasis bahan pangan lokal, dan pelatihan wirausaha skala rumah tangga. Evaluasi efektivitas diukur melalui kuesioner pre-test dan post-test pada kelompok sasaran yang terdiri dari ibu balita, ibu hamil, dan kader posyandu. Hasil kegiatan menunjukkan adanya peningkatan pemahaman dan keterampilan peserta sebesar 63,3% terkait praktik pemberian MP-ASI yang tepat serta peningkatan keterampilan olah pangan berbasis bahan lokal hingga 77,5%. Di sektor ekonomi, pendampingan berhasil membentuk unit usaha mandiri warga yang memproduksi produk olahan lokal, sehingga mendukung peningkatan daya beli keluarga terhadap makanan bergizi. Sinergi antara edukasi gizi dan penguatan ekonomi terbukti efektif menciptakan kemandirian pangan dan berpotensi menurunkan risiko stunting secara berkelanjutan di Desa Tanjung.
Co-Authors Achmad Zubaydi Ahmad Zubaydi Ayu Nastiti, Yulia Bagiyo Suwasono Bagiyo Suwasono Bagiyo Suwasono, Bagiyo Daffa Ikzaz Faiz Erifive, Pranata Fajar, Achmad Herman Pratikno, Herman I Nyoman Budiantara Muhammad Fausi Nur Aini Pradityana, Atria Pramudya Imawan Santosa Pranatal, Erifiive Rizkiyah Ramadani Sjarief Widjaja Suardi Suardi Vika Ramadhana Fitriyani Wilianarti, Pipit Festi Winda Amalia Herdianti Yuanita Wulandari Zakiyah Yasin Zubaydi, Ahmad