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All Journal TEKNIK KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Mechatronics, Electrical Power, and Vehicular Technology Department of Naval Architecture Rekayasa Mesin JURNAL INTEGRASI INOVTEK POLBENG Warta Penelitian Perhubungan Abdimas UNWAHAS : Jurnal Pengabdian Masyarakat UNWAHAS International Journal of Marine Engineering Innovation and Research Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi JURNAL SAINS DAN TEKNOLOGI MARITIM Indonesian Journal of Innovation Multidisipliner Research Warta Penelitian Perhubungan
Ari Wibawa Budi Santosa
Departemen Teknik Perkapalan, Fakultas Teknik, Universitas Diponegoro Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275
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Analisis Reschedule Keterlambatan Proyek Reparasi Dua Kapal dengan Metode Critical Path Method (CPM) dan Time Cost Trade Off (TCTO) pada KM. Kendhaga Nusantara 4 dan TB. Sorowako Star Syahada, Keisha Nandhini; Rindo, Good; Santosa, Ari Wibawa Budi; Prasetyo, Naufal Abdurahman
JURNAL INTEGRASI Vol. 16 No. 2 (2024): Jurnal Integrasi - Oktober 2024
Publisher : Pusat Penelitian dan Pengabdian Masyarakat Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/ji.v16i2.8451

Abstract

The rescheduling due to delays in the repair project of two ships being worked on simultaneously was carried out using the Critical Path Method (CPM) and Time Cost Trade Off (TCTO). The data obtained came from the repair lists of each ship. The aim was to expedite project completion and achieve the most optimal time and cost efficiency. Acceleration alternatives were calculated, such as adding labor and extending work hours on the critical path. The acceleration steps included adding 2 and 4 extra working hours and increasing the number of workers. The analysis results showed that the most optimal time reduction was achieved by adding 4 hours of overtime and 21 additional workers, successfully reducing the project duration from 55 days to 20 days, with a time efficiency of 64% and a cost savings from Rp 393,300,000 to Rp 390,330,000, a savings of Rp 2,970,000 or around 0.7%. The daily productivity for scrapping work reached a maximum of 650 m²/day, while the increase in labor and 2 extra working hours resulted in 780 m²/day, and 4 extra working hours resulted in 845 m²/day.
Analysis of the Effect of Voltage and Zinc Plating Duration on Low Carbon Steel A36 by Electroplating Process on Corrosion Rate Ari Wibawa Budi Santosa; Agil Arianda Alkhudry; Untung Budiarto; Eko Sasmito Hadi; Andi Trimulyono
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 2 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i2.4974

Abstract

Corrosion is a significant issue in steel constructions, and zinc coating (electroplating) is one of the methods used to protect steel from corrosion. This research aims to analyze the effect of voltage and duration of zinc coating on low carbon steel A36 through the electroplating process on the corrosion rate and coating thickness. An experimental method was employed, varying the voltage (6, 8, and 10 Volts) and coating duration (10, 20, and 30 minutes) during the electroplating process using a ZnO solution. The corrosion rate was tested electrochemically in a 3.5% NaCl solution. The results showed a significant correlation between voltage, coating duration, corrosion rate, and coating thickness. Higher voltages and longer durations produced thicker zinc coatings and reduced the corrosion rate. The optimal conditions were found at 10 Volts for 30 minutes, producing a 160 (Mu)m thick coating and the lowest corrosion rate of 0.00318 mmpy. The minimal coating condition, 6 Volts for 10 minutes, resulted in a 30 (Mu)m thick coating and a corrosion rate of 0.050120 mmpy.
Investigation of The Effect Hullvane and Bow Foil on Flat-Hull Ship Using CFD Approach Andi Trimulyono; Wahyu Ananda; Kiryanto Ananda; Ari Wibawa Budi Santosa
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 1 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i1.5530

Abstract

The flat-hull ship design is an innovative concept that saves costs and speed-up the fabrication of the ship. Even though the flat-hull ship was hydrodynamically inefficient, some shipowners probably experienced an issue with its unusual shape and disadvantages where drag is greater than that of conventional ships. This paper aimed to improve the design of a flat-hull vessel using hull vane and bow foil to reduce ship resistance. The asymmetric foil NACA 4412 and 0012 were used for the hull vane. For bow foil, only NACA 4412 is used. In addition, the angle of the strut of the hull vane was varied to find out the effect to ship resistance. This study was performed in a numerical approach using computational fluid dynamics (CFD). The mesh-based CFD with RANSE solver was used in this study, and numerical analysis will be conducted to determine ship resistance of flat-hull ships with hull-vane and bow foil. It was found that the effectiveness of hull vanes on ships failed to improve resistance for flat-hulled vessels. Because of the addition of the WSA on the ship, the total resistance of the ship increases following the installation of the hull vane. As an alternative, using bow foil can reduce ship resistance at Fn 0.44 and 0.59 by 10% and 24%, respectively.
Productivity Analysis Using the Critical Chain Project Method Management (CCPM) on Repair Projects Geomarin-III ship 649 DWT. Ari Wibawa Budi Santosa; Ocid Mursid; Muhamad Angger Kalingga; Syaiful Tambah Putra Ahmad; Andi Trimulyono
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 1 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i1.5531

Abstract

Ship repair project planning still often encountered problems that delay ship repair projects to achieve complete ship repair projects. Delays are due to frequent mismatches between ship repair scheduling and conditions that occur at the shipyard. The most commonly used method is the Critical Path Method (CPM). But in reality, the CPM method is considered less effective because there is still safety time for each job. Technological developments found the latest method, namely Critical Chain Project Management (CCPM). This method removes the safety time contained in the CPM method and replaces it with buffer time which is placed at the end of work activities. This study aims to analyze the duration of the critical path, determine labor costs, and the amount of buffer duration on the repair of the Geomarin-III 649 DWT ship. Based on the calculation results obtained on the repair of the Geomarin-III 649 DWT ship with the Critical Chain Project Management (CCPM) method is 10 days, 10 days faster than the normal duration. The labor cost obtained using the CCPM method is IDR. 54,017,500, saving 35% of the normal cost is IDR. 82,680,000, but if the buffer time is used thoroughly, the total estimated labor cost for the CCPM method will increase due to the addition of labor and the duration of the buffer time obtained by the CCPM method as a substitute for safety time, which is 9 days project buffer and 3 days feeding buffers. Based on this research, it was found that the CCPM method is considered effective and can accelerate the duration of the project and minimize labor costs.
Analysis the Effect of Size Variation and Spraying Pressure of Steel Grit on Corrosion Rate of Astm A36 Steel Materials Ari Wibawa Budi Santosa; Iqbal Fahrudin; Ocid Mursid; Imam Pujo Mulyatno; Joko Subekti
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 1 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i1.5532

Abstract

ASTM A36 steel is a steel commonly used in shipbuilding construction. The property of steel that is highly avoided is susceptible to corrosion or corrosive which can reduce the strength of the structure. Over time, technology has developed, and methods have been found to inhibit the rapid rate of corrosion, coating process is one of them. The success rate of coating process is also strongly influenced by the surface preparation process. The surface preparation process in this study was by differentiating the size variations of the SG18, SG25, and SG40 steel grit abrasive materials and the spraying pressure of the 5 bar, 6 bar, and 7 bar abrasive materials and the provision of scratch defects on the specimens that had been coated with epoxy primer paint. The purpose of the research conducted was to analyze variations in size of the abrasive material, the spraying pressure of the abrasive material, and which combination of variations is the best for specimens considered to have been scratched. In each variation, the value of the corrosion rate will be increased when the size of the material increased and the value of the corrosion rate increases when the spraying pressure decreases. The results obtained from this study indicate that the lowest corrosion rate value is 0.0027 mmpy with the outstanding category of the variation used, which is grit SG40 steel abrasive material and at a pressure of 7 bar.
PEMETAAN ASPIRASI DAN KEPUASAN PENGUNJUNG PADA DESTINASI WISATA LOKAMERTA DESA TIRTOMARTO, KECAMATAN CAWAS, KABUPATEN KLATEN Vanda, Shofi Salsabila Dwi; Setyaji, Yekti; Sunarno, Sunarno; Solikhin, Solikhin; Santosa, Ari Wibawa Budi; Fauzi, Adnan; Lestari, Fiya Auliya
Jurnal Pasopati Vol 8, No 1 (2026): Februari
Publisher : Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/pasopati.2026.29004

Abstract

Pengembangan sektor wisata desa menjadi strategi dalam mendukung pertumbuhan ekonomi lokal dan pelestarian budaya. Lokamerta merupakan suatu destinasi desa wisata edukatif yang berbasis Mini zoo dan kereta mini yang terletak di Desa Tirtomarto, Kecamatan Cawas, Kabupaten Klaten. Melalui program Kuliah Kerja Nyata (KKN) Tim 56 Universitas Diponegoro oleh Kelompok 3 dilakukan pemetaan aspirasi dan kebutuhan pengunjung dengan tujuan untuk meningkatkan kualitas pengelolaan wisata. Metode yang digunakan adalah analisis terhadap media sosial Lokamerta dan wawancara secara langsung. Dalam metode tersebut telah melibatkan sebanyak 33 responden. Hasil survei menunjukkan bahwa aspek kebersihan lingkungan dan keragaman pengelola mendapat nilai yang tertinggi, sementara fasilitas umum dan kejelasan informasi masih perlu ditingkatkan kembali. Aspirasi pengunjung juga mencakup pengembangan wahana baru dan pelibatan UMKM Lokal. Kesimpulan dari analisis ini mengacu pada pentingnya pendekatan partisipatif dalam pengelolaan Lokamerta agar menjadi destinasi wisata yang berkelanjutan, edukatif, dan ramah pengunjung.Kata kunci: aspirasi, wisata, Lokamerta, Klaten
OPTIMALISASI KUALITAS HIDUP SATWA MELALUI PENATAAN KANDANG, PENGAYAAN LINGKUNGAN, SERTA PEMANFAATAN EDUKASI DAN TEKNOLOGI Sa'diyyah, Hilma Khalimatus; Wahyuningsih, Dian Tri; Tazkiyah, Tasya; Agustiningsih, Triana Nur; Sunarno, Sunarno; Santosa, Ari Wibawa Budi; Solikhin, Solikhin; Fauzi, Adnan; Lestari, Fiya Auliya
Jurnal Pasopati Vol 8, No 1 (2026): Februari
Publisher : Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/pasopati.2026.29050

Abstract

Penelitian ini bertujuan untuk meningkatkan kualitas pengelolaan satwa di mini zoo melalui pendekatan animal welfare yang terintegrasi dengan pemanfaatan teknologi dan media edukasi. Program dirancang dalam tiga aspek utama, yaitu penataan kandang berbasis pengayaan lingkungan, penerapan sistem humidifier otomatis untuk menjaga kelembaban kandang ular, serta penyusunan infografis edukatif sebagai sarana penyampaian informasi kepada pengunjung. Metode yang digunakan meliputi observasi kondisi kandang, instalasi perangkat elektronik berbasis sensor kelembaban, dan perancangan media visual interaktif. Hasil menunjukkan bahwa penataan kandang dengan konsep animal welfare mampu meningkatkan kenyamanan dan aktivitas alami satwa, humidifier otomatis efektif menjaga kelembaban stabil pada kisaran optimal, dan infografis edukatif terbukti memudahkan penyampaian informasi konservasi kepada masyarakat. Dengan demikian, integrasi antara desain kandang, teknologi otomasi, dan media edukasi dapat mendukung peningkatan kesejahteraan satwa sekaligus memperkuat nilai edukasi pada fasilitas wisata edukatif. Kata kunci: animal welfare, kandang, humidifier otomatis, edukasi, infografis
EDUKASI PEMANFAATAN LIMBAH KULIT SINGKONG FERMENTASI SEBAGAI PAKAN TERNAK DI DESA TIRTOMARTO, CAWAS, KLATEN Suryaningtyas, Melati Aulia; Kusuma, Alexius Adrian Beatle; Sunarno, Sunarno; Fauzi, Adnan; Solikhin, Solikhin; Santosa, Ari Wibawa Budi; Lestari, Fiya Auliya
Jurnal Pasopati Vol 8, No 1 (2026): Februari
Publisher : Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/pasopati.2026.28861

Abstract

Pemanfaatan limbah pertanian sebagai pakan ternak merupakan inovasi strategis dalam mendukung keberlanjutan sektor peternakan. Desa Tirtomarto memiliki potensi besar dalam pengolahan limbah kulit singkong yang selama ini belum dimanfaatkan secara optimal. Program sosialisasi ini bertujuan untuk meningkatkan pengetahuan peternak mengenai manfaat dan teknik pembuatan pakan fermentasi dari kulit singkong. Kegiatan dilaksanakan melalui pendekatan partisipatif door to door, penyuluhan langsung, pemberian contoh produk fermentasi, serta distribusi leaflet edukatif kepada 15 peternak sapi, kambing, dan domba. Hasil kegiatan menunjukkan peningkatan pemahaman peternak terhadap proses fermentasi, nilai nutrisi pakan alternatif, dan pentingnya pemberdayaan limbah lokal. Meskipun terdapat tantangan seperti keterbatasan waktu dan rendahnya tingkat literasi peserta, program ini berhasil membangun kesadaran dan keterampilan praktis yang dapat diterapkan secara mandiri. Temuan ini menunjukkan bahwa pendekatan edukatif yang disesuaikan dengan kondisi lokal dapat mendukung ketahanan pakan ternak yang berkelanjutan. Kata kunci : pakan fermentasi, limbah kulit singkong, peternakan, penyuluhan
Co-Authors A.F. Zakki Abizar, Muhammad Affan Afif Ardian Aziz Agil Andrian, Agil Agil Arianda Alkhudry Agustiningsih, Triana Nur Ahmad Fauzan Zakki Ahmad Fhadillah Ahmad, Zindhu Maulana Aji Prasetyaningrum Aji, Alfi Bayu Akbarulah Bumi Aji Alaik Farhan Maulidi Aldi Tama Aldino Ihsan Alfian, Wahyu Ali Mustofa Alqarni.M, Ways Ambar Isworo Aminuddin, Rahmat Ridlo Ammar Faruq Haidar Majid Anak Agung Istri Sri Wahyuni Andi Trimulyono Anggit Andilala Arif Rahman Aris Sugiharto Arsha, Nabila Syahadati Artha Deri Putra Asiyah, Tahsya Azalia, Nashwa Azzam, Muhammad Abdullah Bahtiar, Muhammad Hafids Bambang Sri Waluyo Bayu Wisnu Sasongko, Bayu Wisnu Berlian Arswendo Adietya Bhakti Sa’ Dana Boris De Palma Sitorus C. I. Sutrisno Catur Agus Putra Pribadi Putra Pribadi Chandra Wijaya Panggabean Deddy Chrismianto Defina - Prawoto Dewangga, Andresito Ignacia Dhony Catur Pamungkas Dzakwan, Muhammad Aufa Edi Yuliana Egi Juniawan Eko Didik Widianto Eko Sasmito Hadi Eko Sasmito Hadi Enggal Noor Laksono Fahmi Fernando Yuliansyah Fakhrian, Muhamad Zaki Faris Nofandi Fauzi, Adnan Febiani Dwi Utari Febrian Wahyu Wijaya Firnandito, Anugrah Gema Mar'ie Habibie Gilas Dwi Maylano good rindho Good Rindo Gozal Apri Prayuda Guguraty, Resti Apriana Gunarti, Monika Retno Hardhina Aglomerra Harlinanda, Daffa Alifian Hartanto, Tri Mulyatno Budhi Hartono Yudo Heidija, Anne Marie Herman Ferdinan Philip Simanjuntak Herman Josef Emerald Hermin Werdiningsih Hizkia Parningotan Pangaribuan I Gede Bayu Pradnya Subagia Ibrahim, Muhammad Husein Imam Pujo Mulyatno Imam Pujo Mulyatno Imam Pujo Mulyatno Indro Sumantri Iqbal Fahrudin Iqbal, Muhammad Faiq Islam Filardli, Abdullah Malik Jati Utomo Dwi Hatmoko Joko Subekti K Kiryanto Kartika, Fira Candra Khaeru Roziqin Kholill Bayu Ardhiyanto Kiryanto Ananda Kiryanto Kiryanto Kiryanto Kiryanto Kiryanto Kiryanto Kurniawan Teguh Martono Kurniawan, Hosea Kusuma, Alexius Adrian Beatle Lestari, Fiya Auliya Lingga, Emilio Frans Lubis, Nazwa Syalsabilla M. Nafis Setiawan Mamat Riyadi Manik, Parlindingan Mantau, Aprinaldi Jasa Maria Listyo Yulianti Martino, Martino Maulana, Hakim Anang Michael Enrico Mochtar Hadiwidodo Moh Djaeni Moh. Djaeni Mohamad Djaeni Mohamad Djaeni Mohammad Ganesha Husada Mora Sombaon Dalimunthe Muchammad, Rizky Muhamad Angger Kalingga Muhamad Munir Amin Muhammad Etandiv Bismuttantya Muhammad Iqbal Muhammad Iqbal Muhammad Iqbal Muhammad Irfan Muhammad Khalil, Muhammad Muhammad Satya Pranata Muhammad, Rizdian Arsyal Mulyanto, Imam Pujo Musthofainal Akhyar Mustofa, Dandy Ali Nadzirun Bin Basir, Nadzirun Bin Nainggolan, Diontius Nur Adi Triyantoro nur khakiki Nurwantoro . Ocid Mursid Ocid Mursid Parlindungan Manik perdana, muhammad jamal gilang Permadi, Andy Setya Prabaswara, Alvian Dharmala Pradana, Muhammad Daffa Sihma Pranajaya, Wisnu Prasetyo, Emut Andi Prasetyo, Naufal Abdurahman Prawoto, Agus Projek Priyonggo Sumangun Lukitadi Putra, Ridwan Redi R. Danu Henantyo P Raden Mas Radhityo Naramurti Rafli Rio Manurung Rahman, Amni Zakarsyi Ramudi Sembiring Ratna Dwi Kurniawan Reyhan Ardeo Nasution Reza Shah Alam Ridwan Redi Putra Rifat Al Farid Rinanggara, Yozar Rio Wiendargo Y.S Rivetra, Amelia Hayu Rizkhi, Muhammad Ghozi Tirtha Rizky Cahya Kusuma Roni Prasetyo, Roni Rosiana Dewi Rosita, Ila Sa'diyyah, Hilma Khalimatus Samuel . Samuel Samuel Sarjito Joko Sisworo Sarjito Joko Sisworo Sarjito Joko Sisworo Sarjito Joko Sisworo Sarjito Joko Sisworo Sarjito Jokosisworo Setia Budi Sasongko Setto Pramudyo Kusumo Setyaji, Yekti Shafira Nabila Siregar Shandy Perdana Sihaloho, Febrian Sinaga, Joel Greson Sisworo, Sarjito Jokos Siswoyo, Ghaisani Nabilla Solikhin Solikhin Sri Pujiyanto Sri Rahayu Tri Astuti Subekti, Joko Sudarminto, Tri Astuti Sunarno Sunarno Suryaningtyas, Melati Aulia Susanto, Novita Suyanto Suyanto Syahada, Keisha Nandhini Syaiful Tambah Putra Ahmad Tazkiyah, Tasya Tri Admono Triyono Triyono Tubongkasi, Yehezkiel Mizzi Nicole Umasangadji, Fahmi Untung Budiarto Untung Budiarto Utomo Adi Prasetyo Vanda, Shofi Salsabila Dwi Wahyu Adi Nugraha Wahyu Ananda Wahyu Fajar Gemilang Wahyu Krisna Hidayat Wahyuningsih, Dian Tri Widyadhana, Bagas Dhira Wijaya, Safira Febe Wilma Amiruddin Wiranda, Ariiq Daffa Yuning Widiarti