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All Journal Jurnal Teknik Industri Spektra: Jurnal Fisika dan Aplikasinya Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP)
Budhi Handoko
Statistics Department, Faculty Of Mathematics And Natural Sciences, Padjadjaran University, Sumedang, Indonesia
Aerospace Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics

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The Determination of Preventive Maintenance using Simulated Annealing Algorithm Based on Weighted Fitness Function Franty, Yeny Krista; Handoko, Budhi
Jurnal Teknik Industri Vol 20, No 1 (2019): February
Publisher : Department Industrial Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (350.963 KB) | DOI: 10.22219/JTIUMM.Vol20.No1.53-61

Abstract

This study aims to determine the machine maintenance schedule. We use the Simulated Annealing Algorithm. Fitness and reliability functions are functions that are used in the optimization process. Several weighting scenarios are done to see the unity of the function. The results of the scenario produce several alternative schedules. This algorithm is implemented on machines that have more than one sub-machine. This sub-machine is a smaller engine system part. This sub-machine also has one particular function. The results of the study show that the optimal engine maintenance period to use is six periods. There are five scheduling scenarios used in this problem. The resulting schedule can increase the value of reliability and can minimize costs.
The Determination of Preventive Maintenance using Simulated Annealing Algorithm based on Weighted Fitness Function Yeny Krista Franty; Budhi Handoko
Jurnal Teknik Industri Vol. 20 No. 1 (2019): February
Publisher : Department Industrial Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (362.661 KB) | DOI: 10.22219/JTIUMM.Vol20.No1.53-61

Abstract

This study aims to determine the machine maintenance schedule. We use the Simulated Annealing Algorithm. Fitness and reliability functions are functions that are used in the optimization process. Several weighting scenarios are done to see the unity of the function. The results of the scenario produce several alternative schedules. This algorithm is implemented on machines that have more than one sub-machine. This sub-machine is a smaller engine system part. This sub-machine also has one particular function. The results of the study show that the optimal engine maintenance period to use is six periods. There are five scheduling scenarios used in this problem. The resulting schedule can increase the value of reliability and can minimize costs.
OPTIMASI KARAKTERISTIK KUALITAS LEAD-SLAG PERISAI RADIASI BETON MENGGUNAKAN METODE GREY-TAGUCHI DESIRABILITY FUNCTION Sri Winarni; Budhi Handoko
Spektra: Jurnal Fisika dan Aplikasinya Vol 1 No 2 (2016): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 1 Nomor 2, Desember 2016
Publisher : Program Studi Fisika Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (434.68 KB) | DOI: 10.21009/SPEKTRA.012.12

Abstract

Abstrak Perisai radiasi yang digunakan untuk melindungi dari bahaya radiasi merupakan salah satu masalah penting dalam bidang fisika nuklir. Beton merupakan bahan yang efektif, fleksibel dan ekonomis digunakan untuk perisai radiasi. Dalam perisai radiasi beton, berbagai macam bahan dapat digunakan untuk melemahkan foton. Lead-slag perisai beton yang digunakan dalam aplikasi nuklir selain melindungi property harus memiliki karakteristik kualitas yang optimal. Tujuan dari penelitian ini adalah mendapatkan komposisi faktor pembentukan perisai radiasi beton sehingga didapatkan kualitas perisai radiasi beton yang optimal. Metode grey-taguchi desirability function digunakan dengan mempertimbangkan beberapa karakteristik kualitas yang diukur secara simultan. Hasil optimasi didapatkan pada faktor perbandingan air -semen 0,42, kandungan semen 390 kg/m3, perbandingan volume lead-slag agregat 60% dan perbandingan silica-semen 0,15. Kata-kata kunci: optimasi, grey-taguchi desirability function, lead-slag perisai radiasi beton Abstract Radiation shields are used to protect from the harmful effects of radiation is one of the important problems in the field of nuclear physics. Concrete is a material that is effective, flexible and economically used for radiation shielding. In concrete radiation shielding, a variety of materials can be used to attenuate photons. Lead-slag concrete shielding used in nuclear applications in addition to protecting the property must have the characteristics of optimal quality. The purpose of this research is to get the composition of the factors formation of radiation shielding concrete to obtain quality concrete optimal radiation shield. Grey-Taguchi method desirability function is used by considering some quality characteristics measured simultaneous. The results obtained in the optimization factor water-cement ratio of 0.42, cement content of 390 kg/m3, volume fraction lead-slag aggregate of 60% and silica fume-cement ratio of 0.15. Keywords: optimizaion, grey-taguchi desirability function, lead-slag radiation shielding concrete.
IDENTIFIKASI PERUBAHAN POLA CURAH HUJAN MELALUI PERIODOGRAM STANDAR Gumgum Darmawan; Budhi Handoko; Zulhanif Zulhanif
Jurnal Ilmiah Matematika dan Pendidikan Matematika Vol 9 No 1 (2017): Jurnal Ilmiah Matematika dan Pendidikan Matematika
Publisher : Jurusan Matematika FMIPA Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jmp.2017.9.1.2859

Abstract

Rainfall is time series data that has seasonal pattern, usually period 12. The pattern of rainfall seasonal itself often changes. In this paper, the pattern of rainfall will identify by Periodogram Analysis. We use Time series data from one of city in west Java province. By this analysis, it is proved that the pattern of rainfall has been change. Computation itself, we use macro of Open Source Software R (OSSR).
PEMBUATAN APLIKASI PRAKTIS DESAIN BLOK ACAK LENGKAP MENGGUNAKAN BAHASA PEMROGRAMAN LAZARUS Budhi Handoko; Yeny Krista Franty; Gumgum Darmawan
Jurnal Ilmiah Matematika dan Pendidikan Matematika Vol 9 No 1 (2017): Jurnal Ilmiah Matematika dan Pendidikan Matematika
Publisher : Jurusan Matematika FMIPA Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jmp.2017.9.1.2852

Abstract

Completely Randomized Block Design is one type of design experiments in Statistics which is used to conduct experiment involving treatments and blocks. Blocking is used to make experimental unit become homogen in each blok. Analysis to the reults of the experiment using the design usually perform using licensed software such as SPSS or Minitab. In order to use those softwares, we have to buy the license. In addition, if use them, we have to arrange the data into column form which require knowledge about orthogonality principle. This research will develop an application to analyze the experimental data easily, because the input in the form of table that suitable with experimental data format. In this research we used Lazarus Visual Programming which is one of open source software. The result of this research is a practical application that can be used to analyze experimental result produced using completely randomized block design which is bery easy to use. Experimental data from table of experimental result can be directly copied into the cells of the program thus data entry can be fastened. This program is an executable file (*.exe) so it is not necessary to be installed and the size of file is small enough which is 19 megabyte.
PEMBUATAN APLIKASI PRAKTIS DESAIN BLOK ACAK LENGKAP MENGGUNAKAN BAHASA PEMROGRAMAN LAZARUS Budhi Handoko; Yeny Krista Franty; Gumgum Darmawan
Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP) Vol 9 No 1 (2017): Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jmp.2017.9.1.2852

Abstract

Completely Randomized Block Design is one type of design experiments in Statistics which is used to conduct experiment involving treatments and blocks. Blocking is used to make experimental unit become homogen in each blok. Analysis to the reults of the experiment using the design usually perform using licensed software such as SPSS or Minitab. In order to use those softwares, we have to buy the license. In addition, if use them, we have to arrange the data into column form which require knowledge about orthogonality principle. This research will develop an application to analyze the experimental data easily, because the input in the form of table that suitable with experimental data format. In this research we used Lazarus Visual Programming which is one of open source software. The result of this research is a practical application that can be used to analyze experimental result produced using completely randomized block design which is bery easy to use. Experimental data from table of experimental result can be directly copied into the cells of the program thus data entry can be fastened. This program is an executable file (*.exe) so it is not necessary to be installed and the size of file is small enough which is 19 megabyte.
IDENTIFIKASI PERUBAHAN POLA CURAH HUJAN MELALUI PERIODOGRAM STANDAR Gumgum Darmawan; Budhi Handoko; Zulhanif Zulhanif
Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP) Vol 9 No 1 (2017): Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jmp.2017.9.1.2859

Abstract

Rainfall is time series data that has seasonal pattern, usually period 12. The pattern of rainfall seasonal itself often changes. In this paper, the pattern of rainfall will identify by Periodogram Analysis. We use Time series data from one of city in west Java province. By this analysis, it is proved that the pattern of rainfall has been change. Computation itself, we use macro of Open Source Software R (OSSR).
Co-Authors Gumgum Darmawan Sri Winarni Yeny Krista Franty Zulhanif Zulhanif