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All Journal Jurnal Konstruksia Teknika: Jurnal Sains dan Teknologi Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika
Muhammad Iqbal
Universitas Sultan Ageng Tirtayasa
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mathematics Transportation

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METODE BOWTIE UNTUK DAMPAK KECELAKAAN KERJA PADA PROYEK JALAN (STUDI KASUS PROYEK PEMBANGUNAN JALAN TOL SERPONG – BALARAJA SEKSI I A) Andi Maddeppungeng; Siti Asyiah; Muhammad Iqbal
Konstruksia Vol 12, No 1 (2020): Jurnal Konstruksia Vol 12 No. 1 Tahun 2020
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (622.358 KB) | DOI: 10.24853/jk.12.1.135-143

Abstract

Untuk meningkatkan pertumbuhan ekonomi pengembangan infrastruktur merupakan hal dasar yang harus dipenuhi. Semakin tingginya angka pembangunan di Indonesia sejalan dengan meningkatnya angka kecelakaan kerja  Kementerian Ketenagakerjaan mencatat bahwa kasus kecelakaan kerja pada Tahun 2017 sebesar 123.041 kasus dan kasus ini terus meningkat setiap tahunnya yaitu 157.313 pada Tahun 2018 dan yang lebih mengkhawatirkannya lagi adalah 32% dari total kecelakaan tersebut berasal dari sektor industri konstruksi dan manufaktur. Tujuan penelitian ini adalah mengetahui kecelakaan apa saja yang mungkin terjadi di dalam proyek infrastruktur yaitu Jalan Tol Serpong – Balaraja dan melakukan sebuah analisa tentang penyebab, dampak, dan kontrol dari masing-masing penyebab dan dampak tersebut. Metode yang digunakan dalam analisa kecelakaan ini adalah Metode Bowtie, yang mana data analisa yang digunakan berasal dari hasil kuesioner yang telah dibagikan kepada staf pada divisi yang telah ditentukan sebelumnya. Hasil dari penelitian ini adalah di dalam Proyek Jalan Tol Serpong – Balaraja Seksi I A terdapat beberapa potensi kecelakaan kerja yang mungkin terjadi selama pelaksanaan, potensi risiko tersebut terdiri atas 19 potensi risiko yang berkategori Low, 31 potensi risiko yang berada pada kategori Moderate, dan 1 risiko yang berkategori High yaitu balok girder jatuh dan menimpa pekerja (7b). Bagian akhir penelitian juga menunjukkan bahwa penyebab dari kecelakaan kerja terjadi akibat kesalahan operator/staff, terjadi akibat faktor alam/lingkungan, dan faktor mesin dan material. Adapun dampaknya adalah pekerja mengalami luka berat/kematian, alat berat mengalami kerusakan, kerugian akibat material yang rusak dan kerugian akibat waktu yang tertunda.
The effect of steering tail fin on performance on double pillars hybrid vertical axis wind turbine (Sultan Wind Turbine V-4.5) Erwin Erwin; Slamet Wiyono; Muhammad Iqbal; Hilmy Maulana Yusuf
Jurnal Teknika Vol 18, No 2 (2022): Available Online in November 2022
Publisher : Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/tjst.v18i2.17022

Abstract

One of the methods to increase the efficiency of wind turbines is to add directional fins so that the wind turbine faces and is in the same direction as the wind. The use of triangular fins will slightly increase the performance of wind turbines compared to rectangular and trapezoidal shapes. The most crucial factor is that the fin area is not less than 5% of the swept area on the turbine blades. And according to calculations and simulation data, the convex pentagonal shape generates the greatest power. While the tests conducted by P.R. Ebert et al, that a twin wing with a high wing angle shows a greater damping response than a single wing. The aim of this research is to optimize the performance of the Sultan V-4.5 wind turbine by adding guide fins. Simulation methods and design of directional fins were carried out to obtain the most suitable fin shape and size. By using an aspect ratio of 1.4, the distance from the center of gravity to the center axis of the turbine is reduced. Performance tests were carried out using fins with areas of 0.06 m2, 0.12 m2 and 0.22 m2. Twin fins are used, with a 30o angle between them, to reduce the oscillatory forces resulting from wind motion. Fin profiles with maximum force when exposed to wind at angles of 0°, 5°, 10°, 15°, 20°, 25°, and 30° were selected from the available profiles using Computer Fluid Dynamic analysis. To determine the most suitable structure and material for fins, simulate the topology optimization and material selection used. According to his findings, the isosceles and right-angled triangles, which produce forces of 0.91 N and 0.77 N respectively, are the strongest. PVC plates are the materials used. The results of this study indicate that 2 m/s wind speeds frequency, the type 3b fin designs are the best design according to performance tests. The end result, coefficient of power increases and power generates increases respectively 5 and 3.8 times the previous research.
DESAIN PEMBELAJARAN SISTEM PERSAMAAN LINEAR DUA VARIABEL MELALUI CONTEXTUAL TEACHING AND LEARNING Muhammad Iqbal; Sukirwan Sukirwan
Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Vol. 4 No. 3 (2023): Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistik
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/lb.v4i3.486

Abstract

This research aims to comprehend how the context of buying and selling activities and a hypothetical learning trajectory (HLT) can aid in learning two-variables linear equation system through contextual teaching and learning (CTL) in class 8.1 and in class 8.3 at Madrasah Sanawiah al-Mubarok. The research method used is design research. The essential characteristic of design research is the cycle. The research subjects for the first cycle (preliminary teaching) included 28 students from class 8.1. In this cycle the first HLT is being tested to observe students as they progress through the learning trajectory. The revised HLT will be implemented in the second cycle (teaching experiment). The research subjects for the second cycle included 33 students from class 8.3. The obtained data are analyzed qualitatively. The results of the retrospective analysis indicate that the use of buying and selling activity contexts can facilitate students’ understanding of how the two-variables linear equation system is applied to solve related problems. According to the retrospective analysis results, 1) using context of buying and selling activities can aid students in comprehending how to apply the two-variables linear equation system to solve related problems; 2) the HLT in learning the two-variables linear equation system through CTL includes learning objectives, activities that occur during learning, and student answer hypotheses. The learning trajectory used includes making meaningful connections; engaging in significant activities; achieving high standards; self-regulated learning; nurturing and fostering student personalities; critical and creative thinking; collaboration; authentic assessment
Co-Authors Andi Maddeppungeng Erwin Erwin Hilmy Maulana Yusuf Siti Asyiah Slamet Wiyono Sukirwan Sukirwan