Philippine Engineering Journal

The Philippine Engineering Journal (PEJ) serves as a medium of exchange of technical information and dissemination of engineering knowledge through the publication of original technical papers such as original articles, review articles, or short communications in the field of engineering. Published semi-annually by the University of the Philippines National Engineering Center (UP NEC), it is being distributed at reasonable rates to schools, professional organizations, international entities, and practitioners. PEJ articles may be accessed on U.P. Diliman Journals Online (


The PEJ invites authors who wish to publish their works in the fields of chemical engineering, civil engineering, computer science, computer engineering, electrical engineering, electronics and communications engineering, geodetic engineering, energy engineering, environmental engineering, industrial engineering and operations research, materials engineering, mechanical engineering, metallurgical engineering, mining engineering, and other engineering fields. Should you be interested to submit a manuscript, please refer to the guidelines below.


Executive Director

National Engineering Center



Dr. Rinlee Butch M. Cervera






Dr. Marjorie L. Baynosa

Dr. Ariel C. Blanco

Dr. Gerald Jo C. Denoga

Dr. Leslie Joy L. Diaz

Dr. John Richard E. Hizon

Dr. Iris Ann G. Martinez

Dr. Susan Pancho-Festin

Dr. Edwin N. Quiros

Dr. Analiza P. Rollon

Dr. Karl N. Vergel




Dr. Alias Abdul Rahman

Universiti Teknologi Malaysia, Malaysia


Dr. Joost Santos

George Washington University, USA


Dr. Jiro Takemura

Tokyo Institute of Technology, Japan


Dr. Chua-Chin Wang

National Sun Yat-Sen University, Taiwan


Dr. Jeffrey Rimer

University of Houston, USA


Dr. Po-Ya Abel Chuang

University of California Merced, USA





Dr. Hongbo Cong

University of Akron, USA


Dr. Mary Lyn Lim

Coatings Innovation Center, USA


Dr. Aristotle Ubando

De La Salle University

Arlene H. De Ocampo

Head, Engineering Information Division

National Engineering Center


Patricia M. Estopace

Erwin G. Gabriel

Publication Staff


Vol 43, No 2 (2022)

Cover Page

Stop-Go Map (green for go, red for stop) based on the School Reopening Viability (SRV). The SRV is an indicator that the region has already reached the downtick points (infection, death) based on their vaccination coverage. (a) Infection SRV; (b) Death SRV; (c) Vaccination Coverage as of February 2022.