This issue consists of 10 articles from 32 authors affiliated with 16 institutions from 5 countries including:

• Indonesia (Universitas Pendidikan Indonesia, Universitas Sultan Ageng Tirtayasa, Institut Teknologi Bandung, Universitas Indonesia, Universitas Negeri Makasar, UIN Sunan Gunung Djati)
• Pakistan (Government College University Lahore, Minhaj University, Agriculture University Faisalabad, Khawaja Fareed University of Engineering and Information Technology, Lahore College for Women University, University of Education Lahore, University of the Punjab, University of Engineering and Information Technology)
• Nigeria (Nwafor Orizu College of Education Nsugbe)
• Liberia (William V. S. Tubman University)
• Sweden (KTH Royal Institute of Technology)

Articles

How to Calculate Economic Evaluation in Industrial Chemical Plant Design: A Case Study of Gold Mining Using Amalgamation Method

Meli Fiandini, Asep Bayu Dani Nandiyanto

Analysis of Bed Temperature on Circulated Fluidized Bed Boiler Using Simple Multivariable Regression

Asep Kurniawan, Teguh Kurniawan, Hafid Alwan, Yazid Bindar, Anton Irawan

Techno-Economic Analysis of the Business Potential of Recycling Lithium-ion Batteries Using Hydrometallurgical Methods

Dwi Rizky Rachmadhani, Bambang Priyono

Smart Packaging Innovation for Food: Enhancing Shelf Life and Quality of Perishable Goods

Keisha Rafina Rahman, Salzabila Ramdhani, Viola Gracelia Sanyoto, Zheeva Nawareza

Exploring Diverse Substrates for Enhanced Water Splitting: Tailoring Energy Conversion and Storage through Specific Qualities with Its Limitations

Abdul Waheed, H. Habibullah, Muhammad Irfan, Ali Hassan, Benish Habib, Shabbar Abbas, Muhammad Zakiullah Shafique

Hard and Soft Acids and Bases (HSAB): Investigating Adduct Formation in Non-Aqueous Solvent Media with Selected Divalent Class B Metal Ions in Chemistry

Felicity Uju Onwudinjo

Bibiliometric Analysis using Vosviewer with Publish or Perish of Fiber As A Soilless Planting Medium

Ade Yeti Nuryantini

Machine Learning-Based CO2 Hydrogenation to High-Value Green Fuels: A Comprehensive Review for Computational Assessment

Muhammad Ahmed, Rukhsar Latif, Shabaz Seher, Rida Sajjad, Tariq Hussain, Muhammad Raza Islam, Abdul Waleed

How to Design and Fabricate a Sugarcane Bud Chipping Machine with a Foot Pedal

Smith Samah, Samuel A. Olabisi

A Dynamic Area-Pressure Model Applied to Crystals in A Pot Plant Battery and Other Space Matter

Lena J. T. Strömberg