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Transplantasi Coral sebagai Aksi Peduli Lingkungan untuk Pemanfaatan yang Berkelanjutan dj, Ashury; ., Juswan; Rachman, Taufiqur; Paroka, Daeng; Baeda, Achmad Yasir; Rahman, Sabaruddin; Umar, Hasdinar; Paotonan, Chairul; Alie, Muh. Zubair; Husain, Firman; Assidiq, Fuad Mahfud; Nasir, Andi Mega Mustika
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 7 No 2 (2024): Kolaborasi yang Kuat untuk Kekuatan Kemasyarakatan
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v7i2.553

Abstract

The existence of coral reefs in Indonesia ranks first in area and type. The total area of coral reefs owned by Indonesia is 14% of the total area of coral reefs in the world. Coral reefs have an important value in life, both in terms of ecology to promising economic value. Therefore, the Department of Marine Engineering in collaboration with partners of the South Sulawesi Provincial Tourism Office held an activity “Coral Transplantation as an Environmental Care Action for sustainable use”. This activity has the aim of providing an understanding of the importance of knowledge about the economic and environmental benefits of coral reefs as a beach / sun tourism attraction for domestic and foreign tourists to visit the province of South Sulawesi, especially on Badi Island in Pangkep Regency (Pangkajene Islands). Coral reefs that have been damaged require a long time to recover, due to the slow growth rate of corals. Therefore, human intervention through various methods and means becomes indispensable to improve and rehabilitate the condition of coral reefs. One rehabilitation technique that has been widely recognized and applied in various parts of the world is coral transplantation. By using lecture and discussion methods, as well as coral reef rehabilitation efforts through the real action of coral transplantation. The results obtained showed that there was an increase in knowledge before and after the community participated in the activity and the degradation of coral reefs that occurred could be restored through transplantation of 500 donor corals. The conclusion of this activity indicates that the presentation of material in the form of lectures and discussions has increased community knowledge, and the real action of coral reef transplantation can increase coral reef colonies as a sustainable use.
Pengaruh Hidro-oseanografi pada Penempatan Terumbu Buatan di Kawasan Pantai Indonesia Rachman, Taufiqur; Suleman, Siti Arifaini; Nur, Fitrahwati
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 5, Number 3, November 2024 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.v5i3.41395

Abstract

The existence of artificial reefs in coastal areas is used to repair damaged habitats by simulating the ecological role of natural coral reefs. The selection of placement locations under the sea is done so that artificial reefs can function properly. The purpose of this study was to determine the influence of hydro-oceanographic characteristics on the placement of artificial reefs that have been carried out in several coastal areas in Indonesia. This research is expected to provide an overview of the effectiveness of artificial reef placement towards efforts to repair damage to the coastal ecosystem. Artificial reef data was obtained in coastal waters located in Java and Sulawesi Island. Review of the application of artificial reefs includes placement location, hydro-oceanographic data, and evaluation of the existing condition of artificial reefs after the sinking period. The review of the relationship between the initial data and the existing condition of artificial reefs after the sinking period at the placement site against the hydro-oceanographic characteristics of the respective coastal water location. The success of artificial reef placement as a coastal ecosystem restoration effort is strongly influenced by bathymetry contours, wave height, current speed, and sedimentation.
Pemeliharaan Sarana Bantu Navigasi Pelayaran (SBNP) pada Wilayah Kerja Distrik Navigasi Makassar Makmur, Irfan; Sitepu, Ganding; Rachman, Taufiqur
Warta Penelitian Perhubungan Vol. 35 No. 1 (2023): Warta Penelitian Perhubungan
Publisher : Sekretariat Badan Penelitian dan Pengembangan Perhubungan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25104/warlit.v35i1.2222

Abstract

Untuk menjamin keamanan dan keselamatan pelayaran dari bahaya kenavigasian dilakukan penataan alur pelayaran melalui penandaan atau pemasangan Sarana Bantu Navigasi Pelayaran (SBNP). Pemeliharaan SBNP menjadi hal yang penting untuk dilaksanakan secara berkala agar keandalannya dapat terjaga dan tercapai. Tujuan utama pemeliharaan yaitu keamaman dan keselamatan pelayaran bagi kapal-kapal yang berlayar sesuai dengan target keandalan pemerintah sebesar 95%. Tujuan penelitian ini adalah: 1) Untuk mengukur efektivitas penerapan peraturan Menteri Perhubungan nomor PM 25 Tahun 2011 tentang Sarana Bantu Navigasi Pelayaran dan 2) Menyusun strategi peningkatan kegiatan pemeliharaan SBNP pada Kantor Distrik Navigasi Makassar. Dengan menggunakan metode Analisis Deskriptif Kualitatif dengan cara observasi, dokumentasi, dan wawancara, disimpulkan bahwa kegiatan pemeliharaan SBNP jenis Rambu Suar dan Pelampung Suar belum efektif, sedangkan SBNP jenis Menara Suar sudah efektif. Beberapa faktor yang mempengaruhi efektivitas penyelenggaraan SBNP dalam hal pemeliharaan antara lain belum adanya rencana pemeliharaan secara detail, kekurangan anggaran, serta jumlah dan kompetensi petugas SBNP dan Anak Buah Kapal Negara kenavigasian. Penyusunan strategi peningkatan kegiatan pemeliharaan SBNP dilakukan dengan menggunakan metode Analisis SWOT. Hasil analisis menerangkan bahwa pemeliharaan SBNP dapat dioptimalkan dengan membuat detail rencana pemeliharaan SBNP, mekanisme pemeliharaan menggunakan sarana moda transportasi darat, dan optimalisasi pegawai dengan peningkatan kompetensi untuk menjadi petugas SBNP.
PENERAPAN VALUE STREAM MAPPING DAN PROCESS ACTIVITY MAPPING UNTUK IDENTIFIKASI DAN MINIMASI 7 WASTE PADA PROSES PRODUKSI SEPATU X DI PT.PAI Zulfikar, Ananda Muhammad; Rachman, Taufiqur
Jurnal Inovisi (Teknik Industri) Vol 16, No 01 (2020): INOVISI : JURNAL TEKNIK INDUSTRI
Publisher : Universitas Esa Unggul

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

Abstract

PT.PAI merupakan sebuah industri padat karya yang bergerak di bidang industri sepatu olahraga. PT.PAI memiliki karakteristik make to order dalam proses produksinya. Pada proses produksi sepatu X ditemukan beberapa pemborosan, sehingga untuk mengetahui dan memperbaikin pemborosan tersebut digunakan Tools Value Stream Mapping dan Proscess Activity Mapping. Tujuan dari penelitian ini adalah untuk mengetahui dan memperbaiki pemborosan (waste) pada proses produksi sepatu X. Dari penelitian yang dilakukan, diperoleh beberapa waste pada proses produksi sepatu X diantaranya yaitu waiting, motion, dan transportation. Dari hasil perbaikan didapat peningkatan aktivitas value added sebesar 44.29%, dan necessary but non value added mengalami penurunan sebesar 44.29%. Untuk persentase waste waiting mengalami penurunan 98.5 %, waste motion tidak mengalami penurunan, dan waste transportation mengalami penurunan sebesar 22%. Usulan perbaikan yang diberikan untuk meminimasi adanya waste waiting dengan cara melakukan 2nd process yang dilakukan oleh vendor, sedangkan untuk waste transportation dilakukan perbaikan dengan cara mengganti alat transportasi dari trolley manual menjadi motor trolley. Kata Kunci: Lean Manufacturing, VSM, Value Stream Mapping, PAM, Process ActivityMapping
Assessing Sediment Transport and Shoreline Dynamics in High-Energy Tropical Coasts Umar, Hasdinar; Paotonan, Chairul; Rachman, Taufiqur; Nur, Sitti Hijraini; Muhiddin, Amir H.; Maming, Muhammad Idhil; Andriadi, Andi M. Rezky; Assidiq, Fuad Mahfud
Civil Engineering Journal Vol. 11 No. 7 (2025): July
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-07-022

Abstract

This research examines coastal erosion in North Galesong, Indonesia, by validating longshore sediment transport (LST) equations and predicting shoreline changes over ten years. To evaluate sediment movement and coastline alterations, it integrates field data on sediment grain size and wave characteristics with numerical modeling techniques, including the CERC equation and finite difference methods. Sieve analysis revealed a range of sediment textures (D50: 0.17–0.65 mm), predominantly medium-fine sand. Wave analysis indicated a dominance of moderate energy southwesterly waves (1.5 m height, 6.39 s period) that aid sediment transport. The empirical LST models, calibrated with local data, closely matched numerical simulations (error <20%), predicting an annual net northward sediment transport of 406,869 m³. Shoreline analysis across 15 segments showed significant spatial variability: severe erosion occurred in Cell 4 (Δy = -0.82 m), while Cell 3 saw accretion (Δy = +0.68 m), influenced by wave direction, sediment supply, and coastal morphology. This study underscores the value of hybrid empirical-numerical methods in data-scarce regions and emphasizes the need for local model calibration to enhance coastal resilience. The findings inform sustainable management practices, promoting adaptive strategies to address sediment imbalances and hydrodynamic changes due to climate factors.
INVESTIGASI SIFAT DIELEKTRIK LAPISAN KOMPOSIT PVDF/ BATIO3/HAP DISINTESIS DENGAN METODE SPIN COATING Adnan, Septian Rahmat; Kurniawan, Budhy; Soegijono, Bambang; Erni, Nofi; Rachman, Taufiqur; Amperajaya, M. Derajat
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol. 11 No. 2 (2025)
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/ame.v11i2.1635

Abstract

Pada penelitian ini larutan komposit PVDF/BaTiO3/HAp disintesis menggunakan material Polyvinylidene Fluoride (PVDF), Barium Titanat (BaTiO3) komersial dan Hydroxyapatite (HAp) yang disintesis dari tulang sapi. Selanjutnya larutan komposit disintesis menggunakan metode solution mixing dan dideposisi menggunakan metode spin coating pada subtrat tembaga (Cu), Silikon (Si) dan Platinum (Pt) pada kecepatan 2000 rpm, 3000 rpm dan 4000 rpm sebanyak 2 lapis untuk tiap sampel. Didapatkan bahwa kecepatan spin coating optimum pada 4000 rpm. Ketebalan dan kekasaran lapisan komposit PVDF/BTO/HAp yang dideposisi pada subtrat silicon (Si) dan Pt 2 lapis yaitu pada rentang 1,04 – 2,52 μm dan kekasaran < 0,1 μm. Dengan bertambahnya komposisi hydroxyapatite pada lapisan komposit PVDF/BTO/HAp dengan kecepatan spin coating 4000 rpm menyebabkan nilai impedasi, konstanta dielektrik dan dielectric loss (tg δ) dengan nilai konstanta dielektrik 15(100 Hz) pada komposisi komposit 35,83 Wt%:35,83 Wt%:28,34 Wt% dan 9 (100 Hz) pada komposisi 40 Wt%:40 Wt%: 20 Wt%, serta nilai dielectric loss (tg δ) 0,15 (100 Hz) dan 0,5 (100 Hz)  pada komposisi 35,83 Wt%:35,83 Wt%:28,34 Wt%. Nilai konstanta dielektrik dari lapisan komposit PVDF/BTO/HAp mengalami kenaikan dengan bertambahnya komposisi hydroxyapatite dari 20Wt% ke 28,34Wt% pada frekuensi rendah di rentang 10 – 1k Hz tetapi menurun pada frekuensi rendah direntang 10 – 100 Hz.
Pemeliharaan Sarana Bantu Navigasi Pelayaran (SBNP) pada Wilayah Kerja Distrik Navigasi Makassar Makmur, Irfan; Sitepu, Ganding; Rachman, Taufiqur
Warta Penelitian Perhubungan Vol. 35 No. 1 (2023): Warta Penelitian Perhubungan
Publisher : Sekretariat Badan Penelitian dan Pengembangan Perhubungan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25104/warlit.v35i1.2222

Abstract

Untuk menjamin keamanan dan keselamatan pelayaran dari bahaya kenavigasian dilakukan penataan alur pelayaran melalui penandaan atau pemasangan Sarana Bantu Navigasi Pelayaran (SBNP). Pemeliharaan SBNP menjadi hal yang penting untuk dilaksanakan secara berkala agar keandalannya dapat terjaga dan tercapai. Tujuan utama pemeliharaan yaitu keamaman dan keselamatan pelayaran bagi kapal-kapal yang berlayar sesuai dengan target keandalan pemerintah sebesar 95%. Tujuan penelitian ini adalah: 1) Untuk mengukur efektivitas penerapan peraturan Menteri Perhubungan nomor PM 25 Tahun 2011 tentang Sarana Bantu Navigasi Pelayaran dan 2) Menyusun strategi peningkatan kegiatan pemeliharaan SBNP pada Kantor Distrik Navigasi Makassar. Dengan menggunakan metode Analisis Deskriptif Kualitatif dengan cara observasi, dokumentasi, dan wawancara, disimpulkan bahwa kegiatan pemeliharaan SBNP jenis Rambu Suar dan Pelampung Suar belum efektif, sedangkan SBNP jenis Menara Suar sudah efektif. Beberapa faktor yang mempengaruhi efektivitas penyelenggaraan SBNP dalam hal pemeliharaan antara lain belum adanya rencana pemeliharaan secara detail, kekurangan anggaran, serta jumlah dan kompetensi petugas SBNP dan Anak Buah Kapal Negara kenavigasian. Penyusunan strategi peningkatan kegiatan pemeliharaan SBNP dilakukan dengan menggunakan metode Analisis SWOT. Hasil analisis menerangkan bahwa pemeliharaan SBNP dapat dioptimalkan dengan membuat detail rencana pemeliharaan SBNP, mekanisme pemeliharaan menggunakan sarana moda transportasi darat, dan optimalisasi pegawai dengan peningkatan kompetensi untuk menjadi petugas SBNP.
Usulan Perbaikan Keseimbangan Lini di PT. XYZ Menggunakan Moodie-Young dan Ranked Positional Weight untuk Meningkatkan Efisiensi Lini Produksi sriwana, iphov kumala; Jatikusumo, Amarilis; Erni, Nofi; Suwandi, Arief; Rachman, Taufiqur
Metris: Jurnal Sains dan Teknologi Vol. 22 No. 02 (2021): Desember
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v22i02.2913

Abstract

PT. XYZ is a company that produces X shoes. To meet customer needs, it is necessary to design an effective and efficient production line. The problem experienced by the company is that the production target has not been achieved, which is 80 pairs per hour. The daily output that is achieved is less than the predetermined production target, so it is necessary to analyze the line balance. The purpose of this analysis is to determine the causes of not achieving production targets, to determine the value of line efficiency, balanced delay, and smoothness index for each method and to get the right proposal for the company. The research was conducted by describing precedence diagrams and collecting time data from each work element then testing and calculating the standard time, following which line balancing was carried out using the Ranked Positional Weight and Moodie-young. From the calculation results, the results obtained a better line balance using the Moodie-young method, namely, an increase in line efficiency by 27.45% from 57.67% to 85.12%, a decrease in balanced delay by 25.09% from 39.97%. to 14.88%, and a decrease in the smoothness index of 39.55 from 62.62 to 23.08. In addition, there was a decrease in the number of operators working by 2 people, from 16 operators to 14 operators and a reduction in the existing work stations (SK) by 4 SK, from 12 SK to 8 SK.
Peningkatan Efisiensi Penanganan Material Melalui Perancangan Tata Letak Fasilitas dengan Integrasi Metode Konvensional Tata Letak dan Algoritma CORELAP Rachman, Taufiqur
Metris: Jurnal Sains dan Teknologi Vol. 22 No. 02 (2021): Desember
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v22i02.2917

Abstract

Material handling methods determine the effectiveness and efficiency of a company. This research was conducted at PT. FIM which is a manufacturing company that produces food packaging made of plastic (plastic food grade packaging), which has ineffective and inefficient material handling problems. The main objective of this research is to design the facilities layout of PT.FIM to improve the efficiency of material handling. In this research, the integration of the conventional layout method and the CORELAP algorithm was used to determine the optimal work station layout. The research stage begins with calculation of the routing sheet based on the OPC, calculation of the floor area and making of ARC in the production area using the CORELAP algorithm method, while for other facility areas using the conventional layout method. The next stage is making ARD and AAD, and conducting MHPS analysis. From the results of this research obtained a layout design that requires the addition of 6 injection machines, a production floor area of 922m2, a raw material warehouse of 26.65m2, a finished materials warehouse of 63.96m2, a work-in-process warehouse of 85.28m2, supporting materials warehouse of 14.34m2, office area and other facilities area of 462m2. The resulting layout design has a material handling distance difference of 49.3m, and a cost difference of Rp.51,978, with a material handling cost efficiency of 78.67%.
Penentuan Interval Waktu Penggantian dan Perbaikan Komponen Kritis Mesin Bubut Type SS-850 di PT. Hamdan Jaya Makmur Dengan Metode Age Replacement Rachman, Taufiqur; Watunglawar, Darmiolla Natasia; Amperajaya, M. Derajat; Adnan, Septian Rahmat; Sriwana, Iphov Kumala
Metris: Jurnal Sains dan Teknologi Vol. 23 No. 01 (2022): Juni
Publisher : Prodi Teknik Industri, Fakultas Teknik - Universitas Katolik Indonesia Atma Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25170/metris.v23i01.3547

Abstract

PT. Hamdan Jaya Makmur is a company that runs in the field of Machining, Engineering, Fabrication, Stamping, and Trading Company, which produces products for small, medium and modern industries. Less than optimal maintenance system with corrective maintenance causes PT. Hamdan Jaya Makmur often experiences machine failure. Based on historical data, it can be seen that the lathe machine type SS-850 experienced very high downtime. Therefore, it is necessary to plan optimal and preventive maintenance of the machine in order to produce according to the target and increase the reliability of the machine. The purpose of this research is to determine the time interval and cost of preventive replacement on components of the lathe machine type SS-850 at PT. Hamdan Jaya Makmur. The method used in this research is the Age Replacement method, namely by determining critical components, determining the distribution pattern of damage, determining distribution parameters, and calculating MTTF and MTTR, where the results obtained are preventive replacement time intervals, and calculating preventive replacement costs. The results obtained from this research are that there are four critical components on the lathe machine type SS-850, namely electric components with a preventive replacement time interval of 11 days and a preventive replacement cost of Rp.3,080,679,253, bearing components have a preventive replacement time interval of 14 days and a preventive replacement cost of Rp.4,931,989,307, the gearbox component has a preventive replacement time interval of 33 days and a preventive replacement cost of Rp.11,621,532,829, and bolt and nut components have a preventive replacement time interval of 11 days and a preventive replacement cost of Rp.1,615,296,412.
Co-Authors ., Ardi ., Ashury A. Narayana Jufri, Muhammad Fauzan Achmad Yasir Baeda Adiputra, Ristiyanto Alie, Muh. Zubair Alkhaer, Ilham Andini, Emanuela Tasya Andriadi, Andi M. Rezky Arafat, Andi Muhammad Alfian Arief Suwandi Arifki, Muhammad Alif Alim Arsyad Thaha, Muhammad Ashury - Ashury, Ashury Assidiq, Fuad Mahfud Awal, Muhammad Andika Samudera Ayu Novia Lestari, Putri Ayyub Ansyari B, Muhammad Bambang Soegijono Budhy Kurniawan Chairul Paotonan Cristofer Ewaldo Daeng Paroka Damayant, Riska dj, ashury Djamaluddin, Ashury Dundu, Denis Restuardi Eko Yusroni Emanuela Tasya Andini Ewaldo, Cristofer Fachry Abda El Rahman Faizin, Agus Fauzan, Dzaky Feby Z Octafani Firman Husain Firman Husain Fitriana Rezki Ganding Sitepu Habibi Palippui Haryo Dwito Armono Hasdinar Umar Idsan, Muhammad Akhsal Ikram, Andi Muhammad Indah Puspita Sari, Indah Puspita Iphov Kumala Sriwana Irfaniyanti, Irfaniyanti Irma Handayani, Irma Istianto B Rahardja Jalil, Jalil Jatikusumo, Amarilis Jesica Jepni D. A Jumadi Jumadi Juswan - Juswan . Juswan Sade Juswan, Juswan Kasba, Putri Sriwahyuni Kriyo Sambodho Kurniawan, Abdi M. Derajat Amperajaya M. Derajat Amperajaya Makmur, Irfan Maming, Muhammad Idhil Masri, Andi Muhammad Maulid Mistipa Avin, Fabelyn Gandryal Muhajirin Muhajirin Muhammad Fadly Muhammad Zubair M Alie Muhammad Zubair Muis Alie Muhammad Zubair Muis Alie, Muhammad Zubair Muhiddin, Amir H. Murdopo, Ragil Musfirah Cahya Fajrah Mustika, Andi Mega Nabila Noor Izmi Nasir, Andi Mega Mustika Nisa, Mu’minatung Nofi Erni Nofi Erni Nofi Erni Nofi Erni Noor Izmi, Nabila Nur, Fitrahwati Pairunan, Teguh Pata’dungan, Geby Phady, Adriani Prasetyo, Adil Farhan Purnama, Bulan Rachmi, Nur Rahim, Fitri Ramadani Rahmat, Nabila Ainun Nur Ramadhan Umar, Muhammad Fitrah Ramasari, Dian Reskiyanti, Reskiyanti Restuardi Dundu, Denis Rezki, Fitriana RILLA GANTINO Rina Anindita Rizky, Zakinah Roesfiansjah Rasjidin Sabaruddin Rahman Safitri Safitri Savhanta Tonapa, Royh Septian Rahmat Adnan, Septian Shirly Wunas Sitti Hijraini Nur Soeratno, Soeratno Sriwana, Nur Mutia Suci, Indah Melati Suleman, Siti Arifaini Suleman, Yuliani Suriamihardja, Dadang Suriamiharja, Dadang A. Suyono Suyono Syaifullah, Muh Syamsuri, A. M. Syamsuri, Andi Makbul Thaha, Arsyad Timang, Novrian Yosua Ujang Juwardi Utama, Muhammad Furqan Lizak Watunglawar, Darmiolla Natasia Widianingrum, Windi WPT, Ari Anggrani Yudha Pratama, Andi Zubair Muis Alie, Muhammad Zulfikar, Ananda Muhammad