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Mirza Yusuf
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jqt@umy.ac.id
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Redaksi Quantum Teknika, Gedung D Lantai Dasar Kampus Terpadu Universitas Muhammadiyah Yogyakarta, Jl. Brawijaya, Tamantirto, Kasihan, Bantul, DI Yogyakarta, 55183
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Quantum Teknika
Published by Universitas Muhammadiyah Yogyakarta
ISSN : -     EISSN : 27211932     DOI : 10.18196
Core Subject : Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Quantum Teknika : Jurnal Teknik Mesin Terapan or Quantum Teknika is a peer-reviewed journal published by Universitas Muhammadiyah Yogyakarta. Quantum Teknika journal publishes twice a year in April and October. Mechanical engineering is a branch of engineering focusing on mechanical engineering research. Despite of that, the development of the mechanical engineering does not solely encompass machinery science but also other machine-related field such as the automotive science which is composed of energy conversion, design and the forming materials. Quantum Teknika journal accommodates these fields in order to spark various innovations in Indonesia. In the journal Quantum Teknika, accommodate these fields in this period, the year of innovation began in Indonesia. - Automotive Research - Research in The Field of Energy Conversion - Materials Engineering - Design and Manufacture
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 12 Documents
 1   2 
Search results for , issue "Vol 1, No 1 (2019): October" : 12 Documents clear
Perancangan Kursi Untuk Memperbaiki Posisi Kerja Guna Meningkatkan Produktivitas Studi Kasus di PG Jatibarang Brebes Akh Sokhibi; Putri Rachmawati
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 1, No 1 (2019): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.010107

Abstract

PG. Jatibarang Brebes is the first company directly under the BUMN (Badan Usaha Milik Negara)  company. this is company produces sugar of Central Java region which is under PTPN IX. There are six stages in the process of producing sugar, namely the milling stage, purification stage, evaporation stage, crystallization stage, the stage of rotation and finishing. The last activity is the packaging of sugar into the sack of 50 kg carried by the operator who sits on a sack with irregular heights. Seen from the aspect of ergonomic seating position is not very suitable because sugar packaging operators work in an uncomfortable position. Therefore, it is necessary to design seats for ergonomic sugar packaging operators. The method used to design this chair is with the concept of ergonomics. The required data include anthropometric data of operator body size, operator complaint during work, packaging process time during work. Then the data is processed to be applied to the design. The design is a prototype which will be measured and compared the output results in the conditions before and after the design was applied. The standard of production output was increased from 384,6 sacks/hour to 454.5 sacks/hour (18,17%) after the new design chair has been applied.
Pengaruh Tegangan Permukaan Terhadap Tumbukan Multiple Droplets Pada Permukaan Stainles Steel Yang Dipanaskan Rafil Arizona
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 1, No 1 (2019): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.010102

Abstract

The present study was conducted to investigate the dynamics of multiple droplets impact under various surface tensions. Here, the ethylene glycol with compositions of  0%, 5%, and 15% were injected through a nozzle into the stainless steel surface as the multiple droplets. The solid surface was heated at the temperatures of 150ºC. The dynamic of multiple droplets have been observed with frame rate of 2000 fps by a high speed camera. A technique of image processing was developed to determine the maximum droplets are spreading ratio. As the result, the surface tension contribute to the maximum spreading ratio significantly. When the droplet surface tension decreases, the maximum spreading ratio increases. The maximum spreading ratio appears when the percentage of the ethylene glycol is 15% at the temperature of 150ºC. From the visual observation, it was shown that a slower emergence of secondary droplets (droplet splashing) was carried out under low surface tension.

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