Journal Issue

Volume 17, Number 2


Index terms:

Bridging Technological Sovereignty and Global Progress through Open Science

Yudan Whulanza, Eny Kusrini, Muhammad Arif Budiyanto, Arnas, Angi Skhvediani

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8510
Pages : 322-328

Index terms: Climate change; Internet of Things; Renewable energy integration; Rural electrification

A Low-cost Reliable IoT-based Hybrid Renewable Energy System in Ecuador’s High Andean Region

Rafael Cordova-Uvidia, Pedro Aguiar-Munoz, Angel Ordonez-Echeverria, Diana Katherine Campoverde-Santos

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8216
Pages : 329-343

Index terms: Complex technical and socio-economic systems; Intelligent decision support system; Multi-agent interaction; Oil and gas industry; Simulation modeling

Intelligent Decision Support System Based on Multi-Agent Interaction Models by The Example of The Oil and Gas Industry

Zhanna V. Burlutskaya, Polina A. Sharko, Aleksei M. Gintciak, Pavel A. Zakharov

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8242
Pages : 344-356

Index terms: Drilling operations; Equivalent circulating density; Machine learning models; Wellbore pressure

Modeling Equivalent Circulating Density During Drilling Operations in the Gulf of Thailand

Kanogkan Leerojanaprapa, Sudarat Suttaloon, Komn Bhundarak , Kittiwat Sirikasemsuk

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.7897
Pages : 357-375

Index terms: Biofuel; Cu-MOF/K2O; Deoxygenation; Pyrolytic catalysis cracking; Waste cooking oil

Biofuel Production from Waste Cooking Oil over Copper-Metal-Organic Framework/ Potassium Oxide Catalyst for Alternative Bioenergy

Tri Widjaja, Ali Altway, Shofia Khoirunnisa, Dinda Amelia Nurhanifa, Mahfud Mahfud, Hendro Juwono, Joni Prasetyo, Deliana Dahnum, Aisyah Alifatul Zahidah Rohmah

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8009
Pages : 376-394


Index terms: Biodiesel properties; Diode array spectrometer; Multivariate calibration; Near- infrared spectroscopy (NIRS)
Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8331
Pages : 422-439

Index terms: Coated recycled aggregate; E-waste powder; Electronic waste; Recycled aggregate
Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8027
Pages : 440-460

Index terms: Air pressure control; Fertilizer bagging; Machine learning; Random forest regression; Voltage regulator
Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.7660
Pages : 461-477

Index terms: Cluster analysis; Digitalization; Human capital; Principal component analysis
Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8258
Pages : 478-497

Index terms: Debris particles; Electrical discharge machining; Material removal rate; Stepped cylindrical electrode

Machinability of the Stepped Cylindrical Electrode in the Electrical Discharge Machining

Kamonpong Jamkamon, Pichai Janmanee, Niwat Mookam, Suppawat Chuvaree

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.7979
Pages : 498-512

Index terms: Adaptive backoff algorithm; Constrained adaptive exponential backoff; Constrained application protocol; Congestion control; RTO estimation

Constrained Adaptive Exponential Backoff: An Algorithm for Effective RTO Estimation in CoAP

Chanwit Suwannapong, Kritsanapong Somsuk, Sucheewa Sittijinda

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8141
Pages : 513-526

Index terms: 3D printing; Silencer; Tesla valve

Analysis of the Applicability of Tesla Valve Geometry Design Manufactured by Polymer 3D Printing for Silencer in 5.56-mm Caliber Rifle

Fattah Maulana, Devara Ega Dynansyah, Ahmad Ahsan Fauzi, Rando Tungga Dewa, Ariyo Nurachman Satiya, Hadi Wahyudi, M. Alif Safril Hudya, Wahyu Caesarendra

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8234
Pages : 527-536

Index terms: Advanced manufacturing; Dark-manufacturing; Fully autonomous manufacturing; Internet of thing (IoT); Lights-out factory; Robotics manufacturing

Lights-Out Factory : Advancements, Challenges, and Prospects for Fully Autonomous Manufacturing

Sivarao Subramonian, Kumaran Kadirgama, Zuhair Khalim, Abdulkareem Al-Obaidi, Satish Pujari, Rakesh Kumar Phanden, Anuar Kassim, Shukor Salleh, Umesh Vates, Amran Ali

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.7651
Pages : 537-564


Index terms: Cold start; Item-based clustering hybrid method; Recommender system; Slope one; Traditional handicraft

A Novel Hybrid Framework for Cold-Start Resolution in Traditional Craft Recommender Systems

I Gusti Agung Gede Arya Kadyanan, Ni Made Ary Esta Dewi Wirastuti, Gede Sukadarmika, Ngurah Agus Sanjaya ER, Is-Haka Mkwawa, Muhamad Asvial

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8289
Pages : 588-606

Index terms: AgZn3 phase; Lead-free solder; Microstructural analysis; Sn-Cu-Zn-Ag alloy; Vickers hardness

Microstructural, Physical, and Mechanical Characteristics of Silver-Modified Tin–Copper–Zinc Lead-Free Solder Alloys

Andromeda Dwi Laksono, Gabriel Batistuta Pamurrung, Hizkia Alpha Dewanto, Jatmoko Awali, Yee-wen Yen, Satoshi Iikubo, Gita Novian Hermana, Turnad Lenggo Ginta, Mavindra Ramadhani

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8271
Pages : 607–621

Index terms: Carboxymethyl cellulose; Calcium chloride; Chitosan; Injectable hydrogel; Sodium alginate

Tri-Polymer-Based Injectable Hydrogel with Hybrid Crosslinking Network: Carboxymethyl Cellulose, Sodium Alginate, and Chitosan

Ayla Annisa Liswani, Apriliana Cahya Khayrani, Ibnu Maulana Hidayatullah, Retno Wahyu Nurhayati, Sunarso Sunarso, Heri Setiawan, Hafizah Mahmud

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8202
Pages : 622–638

Index terms: Adsorption; Hydrothermal; pH control; Photocatalyst; SnO2

Exploring pH-Controlled Hydrothermal SnO2 Nanomaterials from Local Indonesian Precursor for Methylene Blue Dye Degradation

Nelson Jap, Akhmad Herman Yuwono, Nofrijon Sofyan, Donanta Dhaneswara, Fairuz Septiningrum, Eka Nurhidayah, Fakhri Akbar Maulana, Danang Pamungkas Priambodo, Rizqi Ardi Habibie, Sudirman Sudirman, Veinardi Suendo, Yahya Winda Ardianto, Ria Wardhani Pawan

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8207
Pages : 639-653

Index terms: Fiber orientation; Flexural strength; NFRCs; Tensile strength; Renewable energy

Finite Element-Based Evaluation of Fiber Orientation Effects on Sisal and Kenaf Fiber-Reinforced Composites for Lightweight Energy Applications

Julendra Bambang Ariatedja, Alief Wikarta, I Made Londen Batan, Agus Sigit Pramono, Suwarno Suwarno, Putu Suwarta, Sze Wei Khoo, Ubaidillah Ubaidillah

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8003
Pages : 654-673

Index terms: Brain tumor classification; Cancer; EfficientNetV2S; Ensemble learning; MRI multi-section

Optimizing the Classification of Brain Tumors Using Ensemble Learning and Gradient-weighted Class Activation Mapping on Multi-section Magnetic Resonance Imaging Images

I Gede Susrama Mas Diyasa, Denisa Septalian Alhamda, Hanifudin Sukri, Muhammad Salsabeela Rusdi, Deshinta Arrova Dewi, Hana Titania Sastrian, Sayyidah Humairah, Kraugusteeliana Kraugusteeliana

Publication Date (Online):
Mar 31, 2026
DOI: https://doi.org/10.14716/ijtech.v17i2.8360
Pages : 674-691