Volume: 44, Issue: 3 (9 Articles)
Research Article
Title: Study of the physical structure and performance of vertical wind turbines evaluated by bio-mimicry Dipterocarpus alatus, Part 1
Authors: Montri LUENGCHAVANON, Kuaanan TECHATO, Woradej MANOSROI, Ekawat RATCHAI, Suratsavadee Koonlaboon KORKUA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: June, Year: 2026, Volume: 44, Issue: 3, (JUN 2026), pp:1561-1571
DOI: 10.14744/sigma.2026.2052
Viewed: (168) times
Abstract | Full Text| PDF
Research Article
Title: Recognition of audio source recording device using Mel frequency cepstral coefficients and recurrent neural networks
Authors: Venkata Lalitha NARLA, Gulivindala SURESH, D. P. GANGWAR, KRKV PRASAD, Rita Rani BHATTACHARJEE
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: June, Year: 2026, Volume: 44, Issue: 3, (JUN 2026), pp:1572-1586
DOI: 10.14744/sigma.2026.2054
Viewed: (65) times
Abstract | Full Text| PDF
Research Article
Title: Development and analysis of hybrid sustainable polymer reinforced materials
Authors: Md AHASAN, Alajingi RAMKUMAR, KRKV PRASAD, Ratnala PRASAD, Yarrapragada K S SRAO
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: June, Year: 2026, Volume: 44, Issue: 3, (JUN 2026), pp:1587-1596
DOI: 10.14744/sigma.2026.2055
Viewed: (72) times
Abstract | Full Text| PDF
Research Article
Title: Investigation of the usability of modified aSPI and eRDI indexes in Sanliurfa Province and determination of temperature and precipitation trends
Authors: Murat BATAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: June, Year: 2026, Volume: 44, Issue: 3, (JUN 2026), pp:1597-1618
DOI: 10.14744/sigma.2025.1948
Viewed: (54) times
Abstract | Full Text| PDF
Research Article
Title: Homnormal: A comprehensive R package for testing the homogeneity of variances
Authors: Fikri GÖKPINAR, Esra GÖKPINAR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: June, Year: 2026, Volume: 44, Issue: 3, (JUN 2026), pp:1619-1634
DOI: 10.14744/sigma.2025.00061
Viewed: (80) times
Abstract | Full Text| PDF
Research Article
Title: Green synthesis of a zeolite from natural extract of Sapindus as a template
Authors: Fairouz MEZIANI, Zoubir BENMAAMAR, Nadji MOULAI-MOSTEFA, Mourad MAKHLOUF
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: June, Year: 2026, Volume: 44, Issue: 3, (JUN 2026), pp:1635-1645
DOI: 10.14744/sigma.2025.00094
Viewed: (92) times
Abstract | Full Text| PDF
Research Article
Title: Overview of single-phase-shift dual active bridge converter: operation, analysis, design guidelines and comparison of optimized control strategies
Authors: Mehmet Ali USTA, Unal ORDU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: June, Year: 2026, Volume: 44, Issue: 3, (JUN 2026), pp:1646-1673
DOI: 10.14744/sigma.2026.2056
Viewed: (115) times
Abstract | Full Text| PDF
Research Article
Title: A novel approach for clean energy production and decarbonization using floating photovoltaic systems: Türkiye case
Authors: Fulya ÖZGÜN, Tamara BAJC, Kemal KOCA, Fatih KARIPOĞLU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: June, Year: 2026, Volume: 44, Issue: 3, (JUN 2026), pp:1674-1685
DOI: 10.14744/sigma.2026.2057
Viewed: (144) times
Abstract | Full Text| PDF
Research Article
Title: Comparison of random search and gradient-based optimization techniques on design improvement of permanent magnet synchronous motor
Authors: İsmail ÖYLEK, Metin VARAN, Ali ERDUMAN, Ahmet ZENGİN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: June, Year: 2026, Volume: 44, Issue: 3, (JUN 2026), pp:1686-1699
DOI: 10.14744/sigma.2025.00058
Viewed: (359) times
Abstract | Full Text| PDF