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All Journal TELKOMNIKA (Telecommunication Computing Electronics and Control) InComTech: Jurnal Telekomunikasi dan Komputer Journal Industrial Manufacturing
Galang P. N. Hakim
Universitas Mercu Buana
Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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A low cost electromagnetic sensor for detecting holes in metallic sheet Galang P. N. Hakim; Ahmad Firdausi; Mudrik Alaydrus
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 17, No 5: October 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v17i5.12684

Abstract

Unwanted hole in metal sheet that use for vehicle body or structure is proved dangerous situation. To prevent disaster this hole needs to be found before its installation, or other wise it will be time and money consuming once its found when already finished installation. Therefore, an inspection using sensor for metal sheet is recommended to prevent this problem. In this paper, we proposed a new sensor using radio wave propagation to detect holes in metal sheet. We propose to use RSSI methods to detect hole based on electromagnetic wave propagation signal strength. Using this method we success to detect 8mm hole diameter in metal sheet with 1mm thickness. Using this method, we transmit electromagnetic wave energy at about 20 dBm, and we receive with average -27.53 dBm for iron sheet and -23.13 dBm for aluminum sheet.
PENERAPAN FUZZY TOPSIS UNTUK PEMILIHAN PEMASOK PADA DEPARTEMEN SUPPLY CHAIN DI PERUSAHAAN PENGOLAHAN AIR KABUPATEN TANGERANG Diah Septiyana; Galang P. N. Hakim
Journal Industrial Manufacturing Vol 3, No 2 (2018): Journal Industrial Manufacturing
Publisher : Program Studi Teknik Industri Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/jim.v3i2.827

Abstract

Dalam proses pengadaan di departemen Supply Chain metode pemilihan pemasok sangatlah problematic karena ketidakpastian pemilihan pemasok yang diakibatkan oleh adanya ego dan perasaan manusia sebagai salah satu penentu keputusan. Oleh karena itu, dengan adanya  penggunaan metode FUZZY TOPSIS untuk memecahkan masalah pemilihan pemasok ini. Metode FUZZY TOPSIS menentukan pemasok yang memiliki kinerja terbaik dengan menggunakan kriteria yang diberikan oleh pengguna. Dengan menggunakan metode ini keputusan pemilihan pemasok dapat melakukan secara otomatis menggunakan sistem IT pada perusahaan masing-masing, sehingga dapat meminimalkan masalah pengguna dari memilih pemasok terbaik. Contoh dari ini adalah proyek oleh Perusahaan Pengolahan Air di Kabupaten Tangerang untuk menemukan pemasok terbaik dalam sistem distribusi air. Untuk pemasok yang DEI, HP, dan KSP dan diberikan criteria pengguna seperti “Commercial by Costumer”, “Technical Proposal”, “Work Plan & methodology”, dan “Staff Competence”. Dengan menggunakan criteria pengguna untuk membuat matriks keputusan sebagai masukan untuk FUZZY TOPSIS. Hasilnya adalah pemasok KSP menunjukkan performa terbaik dengan nilai 0.50078 lebih baik dari pemasok lainnya.Kata Kunci : fuzzy topsis, supply chain, ERP, pemasok.
Comparison of 920 MHz and 2.4 GHz Near Ground Electromagnetic Wave Pathloss Propagation Model for Wireless Sensor Network in Forest Environment Application Galang P. N. Hakim; Rachmat Muwardi; Mirna Yunita; Diah Septiyana
InComTech : Jurnal Telekomunikasi dan Komputer Vol 12, No 2 (2022)
Publisher : Department of Electrical Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/incomtech.v12i2.14186

Abstract

A Wireless Sensor Network (WSN) system that uses wireless communication technologies occasionally experiences data loss when undertaking wireless data communication. This problem happens because of the WSN system being placed on top of the ground and surrounded by vegetation that adds more loss to the transmission. In order to avoid this problem, the wireless system design must meet its best performance. To build the best performing WSN system, electromagnetic wave behavior in the forest environment needs to be studied well. This paper investigates the electromagnetic wave behavior transmitted and propagated by a WSN node at less than 30 cm from the ground using a 920 MHz frequency. We have analyzed that low height (30 cm) and vegetation environments can also add more loss at about 30.96 dB to the free space pathloss model. The new 920 MHz (that adds 30.96 dB loss) model shows identical behavior to 2.4 GHz with an average difference of 12.24 dB. However, the 920 MHz model performs better, achieving an average RMSE of 1.06 compared with the 2.4 GHz model, which can only achieve an average RMSE of 4.92 compared with the 920 MHz measurement.
Co-Authors Ahmad Firdausi Diah Septiyana Mirna Yunita Mudrik Alaydrus Rachmat Muwardi Septiyana, Diah