Volume: 43, Issue: 5 (30 Articles)
Research Article
Title: SIMULATIONS AND COMPARISONS OF THE HAY AND PEREZ MODELS APPLIED IN PVSYST SOFTWARE AND THEIR EFFECT ON ENERGY OUTPUT
Authors: Sara AL-WAISAWY, Hamdiyah S. JASIM, Ahmed Hussein DUHIS
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1439-1450
DOI: 10.14744/sigma.2025.00133
Viewed: (10) times
Abstract | Full Text| PDF
Research Article
Title: URBAN MORPHOLOGY AND PLANNING FROM AN ENTROPY PERSPECTIVE: A BIBLIOMETRIC EVALUATION
Authors: Esra BAYAZIT
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1451-1472
DOI: 10.14744/sigma.2025.00157
Viewed: (14) times
Abstract | Full Text| PDF
Research Article
Title: CART KNN: A HYBRID DISTANCE-BASED PRE-PRUNED CLASSIFICATION AND REGRESSION METHOD FOR THE EARLY DIAGNOSIS OF ALZHEIMER’S DISEASE
Authors: Pijush DUTTA, Sunita SHARMA, Varun Kumar NOMULA, Gour Gopal JANA, Anubrata MONDAL, Shobhandeb PAUL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1484-1494
DOI: 10.14744/sigma.2025.00147
Viewed: (11) times
Abstract | Full Text| PDF
Research Article
Title: ON THE USE OF DIFFERENT LINK FUNCTIONS IN GAMMA-PARETO REGRESSION MODEL: SIMULATION AND APPLICATION
Authors: Nasir SALEEM, Atif AKBAR, Javaria AHMAD KHAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1495-1506
DOI: 10.14744/sigma.2025.00148
Viewed: (11) times
Abstract | Full Text| PDF
Research Article
Title: EXPERIMENTAL INVESTIGATION OF THERMO-HYDRAULIC PERFORMANCE OF MULTI SEMICIRCULAR RIB OF DIMPLE HYBRID CHANNEL
Authors: Kishor K. DHANDE, Prakash Santosh PATIL, Lalit N. PATIL, Vikash K. AGRAWAL, Atul A. PATIL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1507-1519
DOI: 10.14744/sigma.2025.00148
Viewed: (9) times
Abstract | Full Text| PDF
Research Article
Title: EVALUATION OF THE BENDING FATIGUE BEHAVIOR CRACK PROPAGATION IN ULTRAHIGH-STRENGTH STEEL'S RESISTANCE SPOT WELDING JOINTS, CONSIDERING THE MECHANICAL PROPERTIES
Authors: Mustafa GOKTAS, Bilge DEMIR, Muhammed ELITAS
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1520-1532
DOI: 10.14744/sigma.2025.00149
Viewed: (13) times
Abstract | Full Text| PDF
Research Article
Title: MAGNETOHYDRODYNAMIC FLOW AND EFFECTS OF SORET, DUFOUR AND THERMOPHORESIS THROUGH A CHEMICALLY REACTING POROUS STRETCHING PLATE
Authors: Ankur KUMAR SARMA, Dipak SARMA, Sunmoni MUDOI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1533-1546
DOI: 10.14744/sigma.2025.00150
Viewed: (8) times
Abstract | Full Text| PDF
Research Article
Title: TRENDS AND FUTURE PERSPECTIVES IN WIND ENERGY STUDIES: A BIBLIOMETRIC ANALYSIS WITH TIME-SERIES NEURAL NETWORKS
Authors: Nihal GENC, Ferdi OZBILGIN, Volkan BASER
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1547-1571
DOI: 10.14744/sigma.2025.00151
Viewed: (16) times
Abstract | Full Text| PDF
Research Article
Title: REAL-TIME TOMATO FLOWER ESTIMATION USING DEEP LEARNING MODELS FOR E-AGRICULTURE APPLICATIONS
Authors: Bini D., Pamela D., Shajin PRINCE, K. Martin SAGAYAM, Hatıra GÜNERHAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1572-1579
DOI: 10.14744/sigma.2025.00152
Viewed: (12) times
Abstract | Full Text| PDF
Research Article
Title: CLASSIFICATION OF ANCIENT COINS IN ARCHAEOLOGY USING A NOVEL DEEP LEARNING APPROACH: BAYESIAN CONVOLUTIONAL NEURAL NETWORK
Authors: Ebru PEKEL ÖZMEN, Soner ÖZMEN, Mehmet Emre SERTKAYA, Tuncay ÖZCAN, Vedat KELEŞ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1580-1591
DOI: 10.14744/sigma.2025.00153
Viewed: (13) times
Abstract | Full Text| PDF
Research Article
Title: CAT SWARM OPTIMIZED TUMOR SEGMENTATION AND AN ENSEMBLE MODEL FOR GLIOBLASTOMA PATIENT SURVIVAL PREDICTION
Authors: Bhagyalaxmi K., Dwarakanath B.
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1592-1606
DOI: 10.14744/sigma.2025.00029
Viewed: (15) times
Abstract | Full Text| PDF
Research Article
Title: BROKEN ROTOR BAR FAULT DETECTION IN INDUCTION MOTORS THROUGH POWER SPECTRAL DENSITY TO IMAGE METHOD
Authors: Hatice OKUMUS, Ebru ERGUN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1473-1483
DOI: 10.14744/sigma.2024.00153
Viewed: (12) times
Abstract | Full Text| PDF
Research Article
Title: EXAMINING DIMENSIONALITY REDUCTION EFFECT OF PRINCIPAL COMPONENT ANALYSIS VIA HIERARCHICAL CLUSTERING TECHNIQUES
Authors: Yağmur ŞAN, Tolunay GÖÇKEN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1607-1627
DOI: 10.14744/sigma.2025.00154
Viewed: (14) times
Abstract | Full Text| PDF
Research Article
Title: A CREATIVE COMBINATION OF TIME SERIES MODELS FOR ACCURATE FORECASTING OF MONTHLY RAINFALL: A CASE STUDY IN NORTHEAST INDIA
Authors: D. KARTHIKA, K. KARTHIKEYAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1628-1642
DOI: 10.14744/sigma.2024.00156
Viewed: (16) times
Abstract | Full Text| PDF
Research Article
Title: EXPLORATION OF ULAM-HYERS STABILITY FOR A SYSTEM OF FRACTIONAL INTEGROCOUPLED DIFFERENTIAL EQUATIONS WITH INTEGRAL BOUNDARY CONDITIONS
Authors: Brijendra Kumar CHAURASIYA, Avadhesh KUMAR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1643-1652
DOI: DOI: 10.14744/sigma.2025.00155
Viewed: (13) times
Abstract | Full Text| PDF
Research Article
Title: IN-SITO CO-PYROLYSIS OF TEA WASTE AND POLYPROPYLENE USING MICROWAVEASSISTED PYROLYSIS: PRODUCTS ANALYSIS, ENERGY CONSUMPTION, AND SYNERGY EFFECT
Authors: Husam Talib HAMZAH, Sridevi VELURU, Suhair Abdulhadi MAHDI, Thamer Adnan ABDULLAH, M. TUKARAMBAI, Venkata Rao POIBA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1653-1662
DOI: 10.14744/sigma.2025.00063
Viewed: (15) times
Abstract | Full Text| PDF
Research Article
Title: AN INTEGRATIVE APPROACH TO AGRICULTURAL CHALLENGES: PREDICTIVE MODELING, CROP ALTERNATIVES AND AUTOMATION
Authors: Swapnil S. JADHAV, Lalit N. PATIL, Vikas S. PANWAR, Sachin P. JADHAV, Digvijay B. KANASE, Sayali S. JADHAV, Neeraj D. PATEL, Khushi V. SALI, Srushti M. JOSHI, Ruchi N. NAGWANSHI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1663-1682
DOI: 10.14744/sigma.2025.00156
Viewed: (16) times
Abstract | Full Text| PDF
Research Article
Title: UNBIASED WEIGHTED LEAST SQUARES ESTIMATION OF WEIBULL MODULUS WITH SMALL SAMPLES
Authors: Burak BİRGÖREN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1683-1692
DOI: 10.14744/sigma.2025.00157
Viewed: (16) times
Abstract | Full Text| PDF
Research Article
Title: DESIGNING OF TRIPLE RINGS METASURFACE BASED PERFECT ABSORBER FOR C–BAND AND X–BAND APPLICATIONS
Authors: Jigar M. PATEL, Rahul D. MEHTA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1693-1703
DOI: 10.14744/sigma.2025.00159
Viewed: (7) times
Abstract | Full Text| PDF
Research Article
Title: THE EFFECTS OF USING LITHIUM ON BIOCHEMICAL FACTORS OF URINARY BETA-2 MICROGLOBULIN, CREATININE AND UREA SERUM IN CHRONIC BIPOLAR PATIENTS
Authors: Seyed Reza MOMENI SHIDEH, Amireh Ebrahimi MOGHADAM, Zainab WETWET, Hayder Abbas Hussein AL MAHDI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1704-1711
DOI: 10.14744/sigma.2025.00160
Viewed: (14) times
Abstract | Full Text| PDF
Research Article
Title: MATHEMATICAL ANALYSIS OF FRACTIONAL ORDER COVID 19 EPIDEMIC MODEL
Authors: Pınar AÇIKGÖZ, Mehmet MERDAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1712-1724
DOI: 10.14744/sigma.2025.00161
Viewed: (18) times
Abstract | Full Text| PDF
Research Article
Title: GLOBAL SOLAR RADIATION PREDICTION USING MACHINE LEARNING APPROACHES
Authors: M. MOHANDES, Hilal H. NUHA, Satria Akbar MUGITAMA, S. REHMAN, A. AL-SHAILKHI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1725-1736
DOI: 10.14744/sigma.2024.00128
Viewed: (15) times
Abstract | Full Text| PDF
Research Article
Title: DYNAMIC WATER MONITORING AND MANAGEMENT SYSTEM USING LABVIEW AND MACHINE LEARNING
Authors: Rupali DESHMUKH, Rhea GOMEZ, Pramod GARHWAL, Disha PATIL, Nilaj DESHMUKH
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1737-1750
DOI: 10.14744/sigma.2025.00162
Viewed: (15) times
Abstract | Full Text| PDF
Research Article
Title: AN ABSTRACT APPROACH TO SEQUENCES AND SERIES USING SOFT COMPLEX NUMBERS
Authors: Atiqe UR RAHMAN, Aram NOORI QADIR, Pishtiwan OTHMAN SABIR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1751-1759
DOI: 10.14744/sigma.2025.00163
Viewed: (20) times
Abstract | Full Text| PDF
Research Article
Title: ELECTROKINETIC EFFECT ON FLOW OF TWO-PHASE FLUID IN A CIRCULAR TUBE
Authors: Sangeetha J., Ponalagusamy R.
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1760-1784
DOI: 10.14744/sigma.2025.00054
Viewed: (4) times
Abstract | Full Text| PDF
Research Article
Title: INVESTIGATION OF SEISMIC BEHAVIOR OF HORIZONTALLY CURVED BRIDGES IN COMPARISON WITH EQUIVALENT STRAIGHT BRIDGES ACCORDING TO THE AASHTO LRFD SPECIFICATIONS
Authors: Esra NAMLI, Turgut ÖZTÜRK
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1785-1806
DOI: 10.14744/sigma.2024.00116
Viewed: (10) times
Abstract | Full Text| PDF
Review Article
Title: RECENT AND SIGNIFICANT ADVANCES IN CRYPTO-BIOMETRICS: A DETAILED REVIEW
Authors: Priyanka BHATTACHARYYA, G. S. G. N. ANJANEYULU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1807-1836
DOI: 10.14744/sigma.2025.00164
Viewed: (9) times
Abstract | Full Text| PDF
Review Article
Title: EXPLORING METAL ORGANIC FRAMEWORKS FOR EFFICIENT DRUG DELIVERY: A BIBLIOMETRIC REVIEW
Authors: Buddhadeb DUTTA, Supratim SUIN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1837-1851
DOI: 10.14744/sigma.2025.00165
Viewed: (7) times
Abstract | Full Text| PDF
Review Article
Title: A REVIEW ON UTILISATION OF NANOFLUID IN SOLAR ENERGY HARNESSIN
Authors: Sanjeev Kumar GUPTA, Vivek RATHORE
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1852-1885
DOI: 10.14744/sigma.2025.00166
Viewed: (8) times
Abstract | Full Text| PDF
Review Article
Title: ASSESSING THE ROLE OF CIRCULAR ECONOMY PRINCIPLES IN REDUCING WASTE BY SUSTAINABLE MANUFACTURING PRACTICES: A REVIEW
Authors: Mustafa M. MANSOUR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: October, Year: 2025, Volume: 43, Issue: 5, (OCT 2025), pp:1886-1896
DOI: 10.14744/sigma.2024.00155
Viewed: (8) times
Abstract | Full Text| PDF