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All Journal Jurnal Siber Transportasi dan Logistik Jurnal Greenation Ilmu Teknik
Ebit Bimas Saputra
Dinasti Publisher Group, Jakarta
Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Perancangan Aplikasi Pengaturan Kapal Untuk Transportasi Semen Curah di PT Semen Padang Dengan Menggunakan Algoritma Genetika Ebit Bimas Saputra
Jurnal Siber Transportasi dan Logistik Vol. 1 No. 1 (2023): (JSTL) Jurnal Siber Transportasi dan Logistik (April 2023)
Publisher : Siber Nusantara Research & Yayasan Sinergi Inovasi Bersama (SIBER)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/jstl.v1i1.1

Abstract

Abstract: Currently PT Semen Padang already has a ship scheduling plan for a certain period of time. However, this schedule may not be realized due to factors that cannot be controlled. In this study, a genetic algorithm method was used to help planners solve ship management problems for bulk cement distribution at PT Semen Padang. Researchers designed a more flexible application so that it can accommodate changes that occur in the distribution of bulk cement at PT Semen Padang. Based on these data, a trial scenario was carried out to find out the best parameters to solve the problem. The parameters tested were the number of generations with values 100, 200 and 300, population size with values 100, 150 and 200, the probability of crossing over with values of 60%, 65% and 70%, and the probability of mutation with values of 1%, 10 %, and 30%. The results of the implementation of the application resulted in a total logistics cost of IDR 13.79 billion. Abstrak: Saat ini PT Semen Padang telah memiliki rencana penjadwalan kapal untuk jangka waktu tertentu. Namun penjadwalan ini bisa saja tidak direalisasikan karena adanya faktor-faktor yang tidak dapat dikendalikan. Pada penelitian ini digunakan metode algortima genetika untuk membantu perencana menyelesaikan permasalahan pengaturan kapal untuk distribusi semen curah di PT Semen Padang. Peneliti merancang aplikasi yang lebih fleksibel sehingga dapat mengakomodasikan perubahan yang terjadi pada pendistribusian semen curah di PT Semen Padang. Berdasarkan data tersebut dilakukan skenario uji coba untuk mengetahui parameter terbaik untuk menyelesaikan permasalahan. Parameter yang diuji coba yaitu banyak generasi dengan nilai 100, 200 dan 300, ukuran populasi dengan nilai 100, 150, dan 200, probabilitas pindah silang dengan nilai 60%, 65%, dan 70%, dan probabilitas mutasi dengan nilai 1%, 10%, dan 30%. Hasil dari implementasi dari aplikasi menghasilkan total biaya logistik yang diperoleh sebesar Rp 13,79 milyar.
Pengaruh Temperatur Tempering Terhadap Kekerasan dan Ketangguhan pada Baja Karbon Sedang St60 Ebit Bimas Saputra
Jurnal Greenation Ilmu Teknik Vol. 1 No. 1 (2023): (JGIT) Jurnal Greenation Ilmu Teknik (Februari-April 2023)
Publisher : Greenation Publisher & Yayasan Global Resarch National

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/jgit.v1i1.14

Abstract

This study aims to determine the effect of tempering temperature on the hardness and toughness of ST60 medium carbon steel. Beginning with the hardening process aimed at increasing the natural hardness of the steel, then tempering, aimed at reducing residual stress, hardness, so that it is ductile and has toughness. The method used is an experimental approach. The object of research is hardness and toughness test specimens. Each consists of five groups; I control, II hardening, III tempering 1500C, IV tempering 3500C, and V tempering 5500C. The results of the hardness study showed an increase in hardness in the specimens of group II which had a higher hardness of 445.33 HB, group III had a hardness of 436.83 HB and IV had a hardness of 393.75 HB, while in group V there was a decrease in hardness, which had a hardness 326.41 Hb. Compared to group I which has a hardness of 380.83 HB. While the results of the toughness study showed a decrease in energy absorption in group II, namely 29.596 NM and group III, namely 33.2416 NM, while an increase in energy absorption in group IV, namely 80.8421 NM and group V 163.598 NM, compared to group I, which had an energy absorption of 50 .35N.M.
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