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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: (100) times
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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: (56) times
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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: (45) times
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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: (35) times
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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: (41) times
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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: (24) times
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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: (32) times
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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: (31) times
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Research Article
Title: Study of the physical structure and performance of vertical wind turbines evaluated by bio-mimicry Dipterocarpus alatus, Part 1
Authors: Montri LUNGCHAVANON, 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: (32) times
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Review Article
Title: The impact of digital design on Façade performance: A literature review
Authors: Ayça AKKAN ÇAVDAR, Nilhan VURAL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: April, Year: 2026, Volume: 44, Issue: 2, (APR 2026), pp:1540-1559
DOI: 10.14744/sigma.2026.2049
Viewed: (517) times
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Review Article
Title: Systematic review and analysis on recent techniques of photo sketch matching
Authors: Vishakha SEHDEV VERMA, Nidhi MALIK, Anshul BHATIA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: April, Year: 2026, Volume: 44, Issue: 2, (APR 2026), pp:1526-1539
DOI: 10.14744/sigma.2024.2048
Viewed: (277) times
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Review Article
Title: Recent advancements in refractory materials and digital innovations in precision manufactuing
Authors: Mustafa M. MANSOUR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: April, Year: 2026, Volume: 44, Issue: 2, (APR 2026), pp:1509-1525
DOI: 10.14744/sigma.2025.00096
Viewed: (240) times
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Research Article
Title: Dam-break analysis with infoworks ıcm model for earthquake-damaged Sultansuyu Dam: Different scenarios and computational costs
Authors: Burak ÇIRAĞ, Alp Ertuğrul ÖZER, Rıdvan KARAGÖZ, Bilal UTANCİK, Alaaddin Özgüray AYDIN, Mahmut FIRAT
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: April, Year: 2026, Volume: 44, Issue: 2, (APR 2026), pp:1491-1508
DOI: 10.14744/sigma.2026.2047
Viewed: (256) times
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Research Article
Title: Deep neural network multilayer perceptron for Parkinson’s disease diagnosis using vocal data
Authors: Nalineekumari ARASAVALI, Vinod Kumar MOGADALA, LS Narasimharao POTHANA, Sasibhushanarao GOTTAPU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: April, Year: 2026, Volume: 44, Issue: 2, (APR 2026), pp:1481-1490
DOI: 10.14744/sigma.2026.2046
Viewed: (270) times
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Research Article
Title: Arabic sign language recognition using enhanced optimization: Enhancing communication for people with hearing disabilities
Authors: Mahmoud ROKAYA, Hossam MESHREF, Mehedi MASUD, Ibrahim GAD, Abdulqader M. ALMARS, Basel MAHMOUD, Ammar ALQARNI, El-Sayed ATLAM
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: April, Year: 2026, Volume: 44, Issue: 2, (APR 2026), pp:1456-1480
DOI: 10.14744/sigma.2026.2045
Viewed: (161) times
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