Vol. 10 No. 1 June 2019 ComTechComTech Computer, Mathematics and Engineering Applications P-ISSN: 2087-1244 E-ISSN: 2476-907X Editor in Chief Ngarap Imanuel Manik Mathematics and Statistics Department, Bina Nusantara University, Indonesia Managing Editors Arta Moro Sundjaja Information System Department, Bina Nusantara University, Indonesia Noerlina Information System Department, Bina Nusantara University, Indonesia International Editor Board Agustinus Oey Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea Dase Hunaefi Free University of Bozen-Bolzano, Italy Kiyota Hashimoto PSU Phuket, Thailand Daniel M. Wonohadidjojo Ciputra University, Indonesia Eddy Wiyanto Krida Wacana Christian University, Indonesia Gisela Nina Sevani Krida Wacana Christian University, Indonesia Humiras Hardi Purba Mercu Buana University, Indonesia Leon Andretti Abdillah Bina Darma University, Indonesia Rino Nugroho Sebelas Maret University, Indonesia Tati Nurhayati Bogor Agricultural Institute, Indonesia Zulkardi Sriwijaya University, Indonesia Fergyanto E. Gunawan Bina Nusantara University, Indonesia Firza Utama Bina Nusantara University, Indonesia Ingrid Suryanti Surono Bina Nusantara University, Indonesia Irpan Hidayat Bina Nusantara University, Indonesia Lukas Siswanto Tanutama Bina Nusantara University, Indonesia Rinda Hedwig Bina Nusantara University, Indonesia Tota Pirdo Kasih Bina Nusantara University, Indonesia Tri Pudjadi Bina Nusantara University, Indonesia Wikaria Gazali Bina Nusantara University, Indonesia Language and Layout Editor Eka Yanti Pangputri Bina Nusantara University, Indonesia Dina Nurfitria Bina Nusantara University, Indonesia Atmawati Bina Nusantara University, Indonesia Holil Bina Nusantara University, Indonesia Secretariat Haryo Sutanto Bina Nusantara University, Indonesia Supria Bina Nusantara University, Indonesia Description ComTech is a semiannual journal, published in, June and December. ComTech focuses on various issues spanning in Information Systems, Architecture, Civil Engineering, Computer Engineering, Industrial Engineering, Food Technology, Computer Science, Mathematics, and Statistics. ComTech has been accredited by DIKTI under the decree number 3/E/KPT/2019 (SINTA 2) and indexed by CrossRef, ASEAN Citation Index, Directory of Open Access Journals (DOAJ), Science and Technology Index 2 (SINTA2), Garda Rujukan Digital (Garuda), Microsoft Academic Search, Google Scholar, Academic Resource Index (ResearchBib) and Indonesian Research Repository (Neliti). Research and Technology Transfer Office, Bina Nusantara University, Anggrek Campus, Jl.Kebon Jeruk Raya 27, Kebon Jeruk, Jakarta Barat 11530, Tel. +621-5350660 ext. 1705/1708, Fax.+621-5300244, E-mail: asundjaja@binus.edu, hsutanto@binus.edu, comtech@binus.edu, Url: https://journal.binus. ac.id/index.php/comtech, FB: https://www.facebook.com/ComTechBinus Vol. 10 No. 1 June 2019 TABLE OF CONTENTS Agus Cahyo Nugroho Expert System Development for Course Enrollment Process Using Ripple Down Rules in a University in Surabaya .......................................................................................................................... 1-7 Grensya Bella Vega Persulessy, Nova S. Pratama, Novianti Setiawan, and Nina Sevani Web-Based Expert System to Detect Stress on College Students ............................................................ 9-14 Melki Sadekh Mansuan and Benfano Soewito Distributed Rendering Based on Fine-Grained and Coarse-Grained Strategy to Speed up Time and Increase Efficiency of Rendering Process .................................................................................. 15-22 Mohammad Affaf Maximality on Construction of Ternary Cross Bifix Free Code ............................................................... 23-27 Daniel Martomanggolo Wonohadidjojo Performance Comparison of Firefly and Cuckoo Search Algorithms in Optimal Thresholding of Cancer Cell Images .............................................................................................................. 29-36 Meyliana, Surjandy, Erick Fernando, and Firman Anindra The Influencing factors of Female Passenger Background in Online Transportation with Perceived Ease of Use ........................................................................................................ 37-41 ComTechComTech Computer, Mathematics and Engineering Applications P-ISSN: 2087-1244 E-ISSN: 2476-907X