e-Jurnal ITATS (Institut Teknologi Adhi Tama Surabay)
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Analisis Kekuatan Rangka Pada Desain Mesin Pencacah Ban Multifungsi dengan menggunakan Metode Finete Element Analysis
Full text linkPencemaran lingkungan akibat sampah ban yang sulit terurai secara alami menjadi masalah serius, terutama di Indonesia, yang menghadapi lonjakan jumlah sampah ban yang terus meningkat. Rancangan mesin ini bertujuan untuk merancang dan mengembangkan alat pencacah ban yang dapat mengubah sampah ban menjadi butiran karet, sehingga mengurangi dampak negatif terhadap lingkungan serta memberikan manfaat bagi masyarakat. Alat ini terdiri dari komponen utama, yakni rangka dan pencacah, yang memudahkan proses daur ulang ban. Proses pembuatan alat menggunakan bahan steel mild dengan profil hollow 50 x 50 x 2 mm dan mampu menahan beban hingga 1.608,84 N. Sistem operasional alat ini sederhana dan mudah dioperasikan, dengan motor listrik arus AC 3.7 kW, 220v, dan 50Hz yang menggerakkan mesin melalui gearbox dan rantai. Hasil pengujian menunjukkan bahwa alat ini efektif dalam mencacah ban untuk menjadi butiran karet, berkontribusi dalam mengurangi sampah ban, serta mendukung upaya pelestarian lingkungan. Dengan desain yang efisien dan komponen yang mudah didapat, alat ini diharapkan menjadi solusi praktis dan bermanfaat dalam pengelolaan sampah ban di masyarakat.Kata Kunci : pencemaran lingkungan, sampah ban, daur ulang, alat pencacah ban,Analisis kekuatan rangka, dan Metode finite element analysis
AAnalisis Kinerja Windlass Di KR. Geomarin III Menggunakan Metode FMEA (Failure Mode Effect Analysis)
Full text linkShip activities during the berthing process require an anchor to hold the ship and used to stretch and raise the anchor using a windlass. Optimal windlass performance greatly influences the overall operational efficiency of the ship. This research aims to analyze the performance of KR. Geomarin III windlasses in increasing operational efficiency, both in terms of time, cost and security. The method used in this research is Failure Mode Effect Analysis (FMEA). The research methodology includes collecting primary and secondary data through direct observation, interviews with the crew of Geomarin III. The windlass machine system at KR. Geomarin III is an electric power machine. Apart from that, there is a fishbone diagram to look for factors that cause possible failure of windlass performance on the ship. From the results of this research, 8 potential failure modes were obtained, then the 2 highest failure modes were obtained, in rank 1 the bad weather with an RPN value of 160 and rank 2 the engine did not start with an RPN value of 144. Windlass performance significantly contributes to increasing ship operational efficiency, but it needs to be done routine maintenance and monitoring system to ensure optimal performance in the future.
Implementasi Pencegahan Pencemaran Lingkungan Laut Oleh Zat Berbahaya Menurut Marpol Annex II diatas Kapal (Studi Kasus : MV. Tanto Handal)
Full text linkSeawater pollution due to dangerous chemicals such as dangerous toxic liquids spilled from ship operational activities often occurs. Hazardous chemical spills are a type of pollution that has quite a large impact in the long term. The activity of disposing of ballast water is also a form of marine environmental pollution which, when referring to UNCLOS, includes marine pollution originating from ships. The ballast water system is a system whose presence is mandatory on a ship. This system uses sea water as ballast to keep the ship in balance when the ship is not carrying a load that matches its maximum capacity. Based on the problems above, the objectives to be achieved in this research are to analyze the implementation of MARPOL ANNEX II to prevent marine pollution and to analyze how to implement MARPOL ANNEX II to prevent and overcome marine pollution while on board an MV. TANTO HANDAL. This research was carried out while on board the ship to obtain data using qualitative research methods, so the author will use techniques by making direct observations on the objects being investigated and interviews with the ship's crew. The results of this research are the lack of ability of ship officers in explaining and giving direction on how to prevent marine pollution by dangerous substances to ship crews on board MV. TANTO HANDAL, such as the lack of firmness of the captains in providing direction and monitoring the daily work of the ship's crew, such as the disposal of used ship washing water and ballast water
HAZARD IDENTIFICATION RISK ASSESSMENT AND DETERMINING CONTROL (HIRADC) SEBAGAI UPAYA MENGURANGI RISIKO KECELAKAAN KERJA DAN MENINGKATKAN PENJUALAN PRODUK DI PT XX
No full textIndustri manufaktur memegang peranan penting didalam perekonomian Indonesia karena kemampuannya untuk menghasilkan produk yang dapat diperdagangkan dan membuka lapangan kerja. Dalam industri manufaktur mencakup proses produksi yang sangat kompleks dimulai dari kedatangan bahan baku, kemas, penyimpanan gudang, pemindahan bahan baku dan ke area produksi, pengemasan, dan distribusi. Banyak aktivitas yang dapat menimbulkan terjadinya penyakit akibat kerja (PAK) dan kecelakaan akibat kerja (KAK) yang dapat mempengaruhi dampak penjualan produk. Proses observasi dan wawancara yang dilakukan diperoleh terdapat faktor fisik, ergonomi, kimia pada black area sehingga diperlukan pengukuran identifikasi bahaya dan risiko dengan menggunakan metode HIRADC. Penelitian ini dilakukan di PT XX pada bulan November 2024. Jenis penelitian ini deskriptif kuantitatif menggunakan metode HIRADC dimana pertama melakukan observasi kemudian dilakukan analisis data dari mengidentifikasi kegiatan-kegiatan dan juga kondisi lapangan secara detail yang berpeluang atau berpotensi menyebabkan kecelakaan kerja yang kemudian dilakukan penilaian risiko dan menentukan tingkat risiko. Data hasil identifikasi bahaya dengan Menggunakan Metode HIRADC yaitu ditemukan potensi bahaya sejumlah 24 potensi bahaya, Data hasil penilaian risiko dengan Menggunakan HIRADC yaitu diperoleh 29,16% dengan kategori accepteable dan 71,84% dengan kategori moderate, dan berdasarkan penialaian risiko yang diperoleh maka dilakukan penetapan pengendalian risiko berbasis Hirarki Pengendalian Bahaya dan Risiko Kata Kunci : Identifikasi Bahaya, HIRADC, Kecelakaan Kerj
Analisis Intensitas Kebisingan dengan Menggunakan Aplikasi Sound Level Meter Pada Area Produksi PDAM Karangpilang Surabaya
Full text linkKesehatan dan keselamatan lingkungan kerja mewajibkan para perusahaan untuk menerapkan beberapa aturan untuk memakmurkan para pekerja. Salah satu aturan yang telah diterapkan dan diberlakukan adalah terkait intensitas kebisingan. Seperti Badan Usaha Milik Daerah (BUMD) Perusahaan Daerah Air Minum Surya Sembada Kota Surabaya khususnya Area Produksi Karangpilang yang bergerak dalam pengolahan air minum sampai distribusi. Banyaknya alat pompa yang digunakan menyebabkan intensitas kebisingan di area ini meningkat. Pada ruangan yang terdapat pompa-pompa menjadi sumber kebisingan seperti ruang pompa air baku, ruang pompa air distribusi, dan ruang kompresor-blower unit filter. Berdasarkan penelitian yang dilakukan secara observasi lapangan dengan menggunakan aplikasi didapatkan hasil yaitu rata-rata kebisingan pada rumah pompa air baku sebesar 84,8 dBA. Kemudian pada rumah pompa air distribusi sebesar 85 dBA. Dan pada ruang kompresor-blower unit filter sebesar 77,7 dBA. Dan ketika menggunakan Sound Level Meter didapatkan hasil sebesar 88 dBA pada ruang pompa air baku; 87,4 dBA pada ruang pompa air distribusi; dan 77,2 dBA pada ruang kompresor-blower unit filter
A review on the numerical simulation model of scouring around bridge pier by using Flow-3D software
Full text linkScouring is one of the important issues that caused damage to the structures. Failure due to local scour has inspired many researchers to study the cause of scouring and to predict the maximum scouring depth around the bridge pier. Numerical simulation is proposed as an effective tool for monitoring the depth of scouring to manage the stability and safety of the bridge. Flow-3D is an accurate, fast, proven CFD software that can solve the toughest free-surface flow problems. However, the guideline information of this software is limited. Scouring classification and mechanism around bridge pier has been discussed briefly. The important things about the Flow-3D model setup are discussed. Verification by comparing the experimental and numerical results is required to determine the best model. Some studies of scouring simulation around bride pier by using Flow-3D software were presented in this paper to prove the accuracy of this software in predicting and simulating the scouring. Zhang's research study is selected as the best numerical model which has the closest result with the experimental result due to the error rate is 0%. This study used the Renormalized group (RNG) model as a turbulence model. For sediment scour model Soulsby-Whitehouse equation and Van Rijn equation are proved as the best model for Critical shields number definition and bed-load transport rate equation. The finer mesh size around the bridge pier was set up to get an accurate result. Specified velocity and outflow are used for the left and right boundaries. Moreover, for front and back boundary were using symmetry, and the bottom and top boundary were using the wall and specified pressure
Enhancing New Student Enrollment Using an Integrated SWOT-QSPM Approach: A Case Study of XYZ University
Full text linkCompetition in the service industry, especially higher education, is becoming increasingly intense. This tight competition also affects University XYZ, resulting in a declining number of new students. The purpose of this study is to identify weaknesses, strengths, opportunities, and threats through a SWOT analysis, and to evaluate strategies using QSPM. The SWOT analysis results indicate that the main strategy involves utilizing reputation, diverse study programs, experienced lecturers, and high-achieving students to seize opportunities such as the increasing interest in pursuing higher education. The QSPM analysis shows that the SO strategy has a TAS value of 6.43, the ST strategy has a TAS value of 5.99, the WO strategy has a TAS value of 5.45, and the WT strategy has a TAS value of 5.21. The integration of both analyses results in implementable strategies for increasing new student enrollment, ensuring that the strategies can be effectively applied
Computational Fluid Dynamics-Based Performance Evaluation of an Air Cooler for University Classroom Conditioning: A Case Study of Classroom E304, ITERA
Full text linkThe advancement of cooling technologies aims to enhance indoor comfort, but conventional air conditioners (AC) raise sustainability concerns due to high energy consumption. This study evaluated the performance of an air cooler in classroom E304, characterized by high occupancy and initial temperatures of 28–30°C with 55–57% relative humidity, exceeding comfort limits per SNI 03-6572-2001. After installing a single air cooler, CFD simulations indicated a temperature reduction to 22.50–23.08°C and relative humidity of 54.89–62.34%, within the comfort range. Model validation demonstrated high accuracy, with RMSE below 1°C and MAPE below 3%, confirming the simulation’s reliability for classroom cooling design. The results demonstrate that air coolers provide an effective and energy-efficient solution for tropical classrooms
Analisis Sentimen Cuitan X terhadap Pendaki Asing Gunung Rinjani Menggunakan Algoritma SVM dan Random Forest
Full text linkSocial media platforms have become significant sources of public opinion regarding various issues, including tourism activities. This study analyzes public sentiment towards foreign climbers on Mount Rinjani through X (Twitter) social media posts using Support Vector Machine (SVM) and Random Forest algorithms. Data collection employed web scraping techniques with six relevant keywords, resulting in 4,777 unique tweets after cleaning and duplicate removal. The lexicon-based labeling approach revealed an imbalanced distribution with 63.58% negative sentiment, 18.8% positive sentiment, and 17.63% neutral sentiment. To address class imbalance, Synthetic Minority Oversampling Technique (SMOTE) was applied, creating a balanced dataset of 9,111 samples. Text preprocessing included case folding, normalization, tokenization, stopword removal, and stemming using Indonesian language tools. Feature extraction utilized TF-IDF vectorization with parameters optimized for Indonesian text analysis. The dataset was split into 70% training, 15% validation, and 15% testing using stratified sampling. Evaluation results demonstrated that SVM achieved superior performance with 95.7% accuracy, 96% precision, 95.7% recall, and 95.7% F1-score, while Random Forest achieved 94.4% accuracy, 94.4% precision, 94.4% recall, and 94.4% F1-score. The dominance of negative sentiment indicates public concerns regarding foreign climbing activities that require stakeholder attention. This research contributes to sentiment analysis methodology for Indonesian social media text and provides practical insights for sustainable tourism management in Mount Rinjani National Par
Perancangan Sistem Informasi Daerah Aliran Sungai Terpadu Kepulauan Riau
Full text linkSistem Informasi Pengelolaan Daerah aliran sungai (DAS) diperlukan sebagai wadah untuk informasi dan koordinasi lintas stakeholder yang mengelola wilayah sungai. Universitas Maritim Raja Ali Haji bermitra dengan Badan Perencanaan, Penelitian dan Pengembangan Provinsi, Kepulauan Riau merancang Dashboard Sistem Informasi DAS Terpadu (SIPDAST) Kepulauan Riau yang dilaksanakan melalui proses diskusi terpumpun (focus group discussion) untuk menjaring data dan informasi potensi, isu dan konflik pengelolaan DAS di wilayah Kepulauan Riau yang berfokus pada Pulau Bintan, Batam, Karimun, Natuna dan Lingga. Kegiatan ini dilaksanakan selama bulan Oktober hingga November 2024 di Batam. Hasil rancangan dashboard SIPDAST Kepulauan Riau di antaranya terdapat navigasi-bar yang berisi atribut/fitur beranda, karakteristik DAS secara biogeofisik dan sosial, peta, karakteristik, perencanaan, monitoring serta pengaduan. Hasil dari perancangan dashboard ini dikelola oleh Bappeda Kepulauan Riau sebagai administrator sedangkan Balai Pengelolaan DAS Sei Jang Duriangkang Kepulauan Riau menjadi user. SIPDAST ini menjadi akselerasi keberlanjutan sumber daya air melalui smart integrated watershed management berbasis karakteristik Kepulauan Riau berupa landscape dan seascape kawasan pesisir dan pulau-pulau kecil. Masih belum semua kawasan DAS di wilayah Kepulauan Riau yang diinput dalam sistem informasi ini sehingga diperlukan keberlanjutan dari program ini yang diharapkan dapat menjangkau kawasan DAS seluruh pulau di Kepulauan Riau