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Volume: 44 Issue: 5 Year: 2026
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Volume: 44 Issue: 5 - October 2026

Research Article

1. Assessing the water quality of a rural South-Eastern Nigeria river using water quality assessment indices
Emeka Donald ANYANWU , Sharmine Akter SIMU , Onyinyechi Gladys ADETUNJI , Amarachi Grace STEPHEN
DOI: 10.14744/sigma.2026.2143 Pages : 3055-3066
Abstract Full Text PDF
2. Evaluation of management strategies and drug therapy problems in patients with angina pectoris: A cross-sectional observational study
Faheem Ahmad JAN , Aftab ULLAH , Asif JAN , Abdur RAHIM , Imad ULLAH , Rani AKBAR
DOI: 10.14744/sigma.2026.2144 Pages : 3067-3076
Abstract Full Text PDF
3. Load demand estimation and prediction models for effective planning and sustainability of microgrid project in rural community
Harrison Oyibo IDAKWO , Lanre OLATOMIWA , James Garba AMBAFI , Abubakar Sadiq AHMAD
DOI: 10.14744/sigma.2025.00100 Pages : 3077-3095
Abstract Full Text PDF
4. Modification of high-calcium fly ash to meet ASTM requirements when used as a binder
Mohammed Ali ABDULREHMAN , Esraa A. ABBOD , Ali Abed SALMAN , Akram Q. MOFTEN , Ahmed Hafedh MOHAMMED
DOI: 10.14744/sigma.2026.2145 Pages : 3096-3106
Abstract Full Text PDF
5. A conformal 4-element phased array antenna using a T-junction power divider for beam steering in X-band unmanned aerial vehicle applications
Okan EVREN , Sena Esen BAYER KESKİN , Nurhan TÜRKER TOKAN
DOI: 10.14744/sigma.2026.2146 Pages : 3107-3119
Abstract Full Text PDF
6. Strength optimization of low-molarity geopolymer mortars with ceramic waste powder
Aslı KESKİN , Mucteba UYSAL , Hasan DİLBAS , Turgay COŞGUN , Beyza AYGÜN
DOI: 10.14744/sigma.2026.2147 Pages : 3120-3142
Abstract Full Text PDF
7. Simulation-based analysis of spinal joint loading in SCI patients using lower extremity exoskeletons: Anybody modeling study
İsmail ÇALIKUŞU , Uğur FİDAN
DOI: 10.14744/sigma.2026.2148 Pages : 3143-3156
Abstract Full Text PDF
8. Smart farming: Improved soil classification and yield forecasting using CNNs and machine learning algorithms
Uttam R. PATOLE , Manish SHRIVASTAVA
DOI: 10.14744/sigma.2025.00137 Pages : 3157-3166
Abstract Full Text PDF
9. Deferred statistical limit and cluster points via intuitionistic fuzzy norm
Reena KUMARI , Vijay KUMAR , Archana SHARMA
DOI: 10.14744/sigma.2026.2149 Pages : 3167-3176
Abstract Full Text PDF
10. Design and analysis of a frequency reconfigurable hybrid fractal microstrip antenna with modified patch and ground plane for millimeter wave energy harvesting applications
Patan Imran KHAN , Komera SUDHAKARU
DOI: 10.14744/sigma.2026.2150 Pages : 3177-3194
Abstract
11. Blockchain-enabled virtual smart card authentication for IoT systems and applications
Abdulla J. Y. ALDARWISH , Kalyani PATEL , Aqeel A. YASEEN
DOI: 10.14744/sigma.2026.2151 Pages : 3195-3208
Abstract
12. Explainable artificial intelligence for proactive management of diabetes
Kavita PABREJA , Nishant SINGH , Rohan BANDUNI
DOI: 10.14744/sigma.2026.2154 Pages : 3209-3222
Abstract
13. Metallic pseudo-Riemannian manifold admitting semi-conjugate connection
Rajesh KUMAR , Lalthanpuia CHHANGTE , Gülhan AYAR
DOI: 10.14744/sigma.2026.2155 Pages : 3223-3230
Abstract
14. Matrix geometric method for Markovian queueing model with breakdown, backup server, working vacation and customer impatience
Indumathi P. , Karthikeyan K.
DOI: 10.14744/sigma.2026.2156 Pages : 3231-3245
Abstract
15. The mechanical and modal characteristics of an aluminum-tourmaline metal matrix composite material
Oğuzhan DAŞ , Hasan ÖZTÜRK , Zeki KIRAL , Binnur GÖREN KIRAL , Yeşim YÜCEL ÖZTÜRK , Bahadır UYULGAN , Batuhan DOĞDU
DOI: 10.14744/sigma.2026.2157 Pages : 3246-3258
Abstract
16. Anti-microbial resistance studies of silver (I) and copper (II) from the acylation of urea ligand with benzoyl chloride
Joseph Aondoaver GBERTYO , Solomon Shitor ORDUEN , Sylvester Obaike ADEJO , Isaac Ominyi OGBOGO , Hope Ngohile IORAV , Priscilla NYOM , Comfort ADADU , Christiana ADAH , Godwin EDOR , Carl REDSHAW
DOI: 10.14744/sigma.2026.2158 Pages : 3259-3269
Abstract
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