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Penentuan Kombinasi Jumlah Katalis Dalam Produksi Metanol Menggunakan Metode Fuzzy Dan Evolution Strategies Santoso, Angga
Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control Vol 2, No 1, February-2017
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (543.389 KB) | DOI: 10.22219/kinetik.v2i1.33

Abstract

Sebagai salah satu bahan baku utama dalam berbagai industri kimia, cara yang paling umum digunakan dalam memproduksi metanol adalah melalui proses hidrogenasi karbon. Proses ini hanya dapat dilakukan dalam suhu yang sangat tinggi dan untuk mencapai suhu tersebut membutuhkan waktu yang sangat lama. Salah satu cara untuk mengurangi kebutuhan suhu tersebut adalah menggunakan suatu campuran senyawa kimia yang disebut katalis. Komposisi jumlah katalis yang tepat dan suhu yang sesuai merupakan faktor penting yang menentukan banyaknya produksi metanol yang dihasilkan. Mencari angka yang tepat dari semua kemungkinan melalui uji coba di laboratorium membutuhkan banyak waktu. Oleh karena itu, metode Fuzzy digunakan untuk menghitung banyaknya hasil produksi berdasarkan beberapa percobaan di laboratorium dan algoritma evolution strategies digunakan untuk mencari kombinasi jumlah katalis yang tepat. Katalis yang digunakan dalam uji coba adalah CuO-ZnO-ZrO2. Metode Fuzzy yang digunakan memperoleh akurasi sebesar 80.7% dengan membandingkan hasil dari laboratorium. Dari algoritma evolution strategies diperoleh produksi methanol paling besar pada komposisi jumlah katalis 40% Cu, 40% Zn, 20% Zr, dan suhu 230°C. Komposisi tersebut dapat digunakan untuk memproduksi methanol dengan hasil paling banyak tanpa harus mencoba semua kemungkinan komposisi.
PENGUKURAN NILAI CALIFORNIA BEARING RATIO (CBR) LAPIS PERKERASAN ASPAL DENGAN ALAT DYNAMIC CONE PENETROMETER (DCP) Budhianty, Happy; Sylviana, Rika; Damayanti, Dewi; Al Ansari, Syahrul; Santoso, Angga
BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 1 No 2 (2013): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil
Publisher : Universitas Islam 45 Bekasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (319.9 KB)

Abstract

Generally, DCP is only used to measure the CBR value of soil. In this research, it is tried to introduce the possibility of appliance DCP to measure the CBR value of penetration macadam pavement. Examination was executed at the critical asphalt condition (in the day time, since high burden and temperature) and used 30o cone. DCP was placed directly at the above of pavement surface. The data was analyzed to become the CBR value by using MS - Excel Macro program. The result of this research, appliance the standard DCP with cone 30° applicable to measure CBR value of penetration macadam pavement. Keywords : CBR, DCP
An Exploratory Study of Requirements Engineering Practices in Indonesia – Part 1: Concepts and Problems Kurniawan, Tri A.; Rusdianto, Denny S.; Brata, Adam H.; Amalia, Faizatul; Santoso, Angga; Raharjo, Dini I. N. R. P.
Journal of Information Technology and Computer Science Vol. 4 No. 1: June 2019
Publisher : Faculty of Computer Science (FILKOM) Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (192.273 KB) | DOI: 10.25126/jitecs.201941110

Abstract

This paper provides the first part of statistical research findings of an exploratory study of the requirements engineering practices implemented in software development processes in Indonesia. This first part attempts to reveal facts regarding concepts and problems exist in such requirements engineering practices. We developed a comprehensive online questionnaire consisting of both closed- and open-ended questions in order to capture such facts. We invited 158 participant candidates representing industry and higher education institutions, however, 31 of them joined our web-based survey. Results show that most of participants confirm that requirements engineering must be properly performed in order to clearly define the valid product. They, however, encounter some difficulties in implementing requirements engineering concepts in practice due to a tight schedule, inappropriate skill of the analysts and inadequate tools used.
An Exploratory Study of Requirements Engineering Practices in Indonesia – Part 2: Efforts, Processes and Techniques Kurniawan, Tri Astoto; Rusdianto, Denny S.; Brata, Adam H.; Amalia, Faizatul; Santoso, Angga; Raharjo, Dini I. N. R. P.
Journal of Information Technology and Computer Science Vol. 5 No. 1: April 2020
Publisher : Faculty of Computer Science (FILKOM) Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2679.256 KB) | DOI: 10.25126/jitecs.202051164

Abstract

This paper provides the second part of statistical research findings of an exploratory study of the requirements engineering practices implemented in software development processes in Indonesia. This second part attempts to reveal facts regarding efforts, processes and techniques exist in such requirements engineering practices. Such facts were captured in accordance with the first part which were surveyed through a comprehensive online questionnaire consisting of both closed- and open-ended questions. We invited 158 participant candidates representing industry and higher education institutions, however, 31 of them joined our web-based survey. Results which respect to efforts, processes and techniques are presented along with related interpretations.