This issue has been available online since 1st October 2021 for the regular issue of October 2021. All articles in this issue (6 original research articles) were authored/co-authored by 18 authors from 5 countries (United States of America, Indonesia, Nigeria, Sweden, and Malaysia).

USA-Flag.pngIndonesia-Flag.png Nigeria-Flag.pngSwedia-Flag.pngMalaysia-Flag.png 

Published: 2021-10-01


Edge Crack in Longitudinal Butt-Welded Joint in Thick-Wall Cylinder

Yunan Prawoto, Rachmad Imbang Trittjahjono
Abstract 264 | PDF Downloads 140 | DOI

Page 66-80

Evaluation of Biological Degraded Keratin for Biogas Production Using Dry Anaerobic Digestion System

Sinta Setyaningrum, Regina J Patinvoh, Ronny Purwadi, Mohammad Taherzadeh
Abstract 271 | PDF Downloads 113 | DOI

Page 81-89

The Analysis of Development Natural gas-based Petrochemical Industry in Teluk Bintuni Regency

Dedy Setyo Oetomo, Rizky Fajar Ramdhani
Abstract 284 | PDF Downloads 231 | DOI

Page 103-126

Experimnetal Investigation on Outdoor and Indoor PM2.5 and PM10 in Supermarkets in Bandung During Covid-19 Pandemic

Kasni Sumeru, Toto Tohir, Neni Emrida Panjaitan, Mohamad Firdaus bin Sukri
Abstract 451 | PDF Downloads 116 | DOI

Page 127-135

Relationship Between Indoor Air Quality and Sick Building Syndrome in Post Office Building in Bandung

Yudi Prana Hikmat, Ismail Wellid, Kasni Sumeru, Salma Dzakiyah Az-zahro, Mohamad Firdaus bin Sukri
Abstract 322 | PDF Downloads 189 | DOI

Page 136-145