Volume: 43, Issue: 6 (30 Articles)
Research Article
Title: TO THE 90TH ANNIVERSARY OF PROFESSOR TELMAN A. ALIEV
Authors: Naila MUSAEVA, Ana MAMMADOVA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:1897-1904
DOI: 10.14744/sigma.2025.00154
Viewed: (48) times
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Research Article
Title: DETERMINATION OF FACTORS AFFECTING GREENHOUSE GASES EMITTED TO THE ATMOSPHERE IN EUROSTAT COUNTRIES WITH MULTIPLE LINEAR REGRESSION MODEL
Authors: Ömer Faruk KIZIL, Özge KURAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:1905-1914
DOI: 10.14744/sigma.2025.1925
Viewed: (63) times
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Research Article
Title: OPTIMIZING TEXTUAL SENTIMENT RECOGNITION THROUGH LASSO-BASED FEATURE SELECTION AND ENSEMBLE VOTING TECHNIQUE
Authors: NISHA, Rakesh KUMAR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:1915-1929
DOI: 10.14744/sigma.2025.00136
Viewed: (44) times
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Research Article
Title: NUMERICAL INVESTIGATION OF THE MATHEMATICAL MODEL INCLUDING THE POSSIBILITY OF REINFECTION IN INFECTIOUS DISEASES
Authors: Mehmet KOCABIYIK
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:1930-1942
DOI: 10.14744/sigma.2025.1926
Viewed: (54) times
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Research Article
Title: BIOSYNTHESIS OF SILVER NANOPARTICLES USING AERIAL PARTS OF CARDARIA DRABA L.: PHYTOCHEMICAL ANALYSIS, CHARACTERIZATION, EVALUATION OF ANTIBACTERIAL, CYTOTOXIC ON HUMAN COLON CANCER CELL LINE PROPERTIES AND ENZYME INHIBITORY POTENTIALS
Authors: Özlem BAKIR BOĞA, Esabi BAŞARAN KURBANOĞLU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:1943-1956
DOI: 10.14744/sigma.2025.00092
Viewed: (76) times
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Research Article
Title: SEPARATION OF CATIONS BY CAPILLARY ELECTROPHORESIS: THE EFFECTS OF TEMPERATURE AND VOLTAGE
Authors: Ahmet DURSUN, Cahit DEMETGÜL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:1957-1966
DOI: 10.14744/sigma.2025.1927
Viewed: (43) times
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Research Article
Title: TRIGONOMETRIC BASED B-SPLINE METHOD FOR SINGULARLY PERTURBED SOBOLEV PROBLEMS WITH INITIAL LAYERS
Authors: Shegaye Lema CHERU, Gemechis File DURESSA, Tariku Birabasa MEKONNEN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:1967-1981
DOI: 10.14744/sigma.2025.1928
Viewed: (40) times
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Research Article
Title: PRODUCTIVITY IMPROVEMENT IN MANUFACTURING OF FURNITURE USING QUALITY FUNCTION DEPLOYMENT APPROACH
Authors: Dhananjay APTE, Prafulla HATTE, Vishal PRADHAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:1982-1994
DOI: 10.14744/sigma.2025.00139
Viewed: (66) times
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Research Article
Title: IN VITRO DEGRADATION STUDIES OF POLYLACTIDE/ POLYETHYLENE GLYCOL ELECTROSPUN FIBER BLENDS
Authors: Oluwashina Philips GBENEBOR, Abimbola Patricia POPOOLA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:1995-2005
DOI: 10.14744/sigma.2025.1929
Viewed: (55) times
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Research Article
Title: ULTRASONIC WAVEGUIDE SENSOR DESIGN USING BEND REFLECTORS FOR ELASTIC MODULI AND TEMPERATURE MEASUREMENT
Authors: Anubhav SRIVASTAVA, Arun VALABHOJU, Abhishek KUMAR, Suresh PERIYANNAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2006-2016
DOI: 10.14744/sigma.2025.1930
Viewed: (43) times
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Research Article
Title: STATISTICAL MODELING OF ALKALI PRETREATMENT FOR DEGRADATION OF SACCHARUM
Authors: Muhammad IRFAN, Misbah GHAZANFAR, Hafiz Abdullah SHAKIR, Muhammad KHAN, Marcelo FRANCO
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2017-2030
DOI: 10.14744/sigma.2025.1931
Viewed: (38) times
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Research Article
Title: THE ROLE OF ARTIFICIAL INTELLIGENCE IN ROOTING LOCAL ARCHITECTURE
Authors: Israa Mohammad A. AL-SAFFAR, Osamah Abdulmunem AL-TAMEEMI, Fawzia Irhayyim AL-ASSADI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2031-2049
DOI: 10.14744/sigma.2025.1932
Viewed: (48) times
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Research Article
Title: A STUDY ON COPOLYMERS OF STYRENE WITH A METHACRYLAMIDE CONTAINING BENZOFURAN SIDE GROUP: THEIR MONOMER REACTIVITY RATIOS, THERMAL STABILITIES, THERMAL DEGRADATION KINETICS
Authors: Esra BARIM, Pınar DEMIR, Mustafa DEĞIRMENCI, Cumhur KIRILMIŞ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2050-2065
DOI: 10.14744/sigma.2025.1913
Viewed: (53) times
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Research Article
Title: EFFECT OF PIER-COLLAR SYSTEM ON FLOW CHARACTERISTICS OF COMPOSITE HYDRAULIC STRUCTURE
Authors: Rafi Mohammed QASIM, Khalid AL-ASADI, Ihsan Abdulkareem ABDULHUSSEIN, Qusay Abdulrazzaq MAATOOQ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2066-2083
DOI: 10.14744/sigma.2025.1911
Viewed: (54) times
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Research Article
Title: EFFECT OF REINFORCEMENTS IN ALUMINIUM 5052-MAGNESIUM AZ31 EXPLOSIVE CLADDING
Authors: S. SARAVANAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2084-2093
DOI: 10.14744/sigma.2025.1912
Viewed: (45) times
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Research Article
Title: ACZEL ALSINA AGGREGATION OPERATORS OF (M,N,Q)-SPHERICAL HESITANT FUZZY SETS AND THEIR APPLICATIONS IN MULTI-ATTRIBUTE DECISION-MAKING
Authors: Şerif ÖZLÜ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2094-2107
DOI: 10.14744/sigma.2025.1933
Viewed: (79) times
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Research Article
Title: A MODEL TO PROTECT DISASTER RECOVERY CENTERS FROM CYBER THREATS WITH MULTI-LAYERED NETWORK SECURITY ARCHITECTURE
Authors: Aykut YILMAZ, Ali GÜNEŞ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2108-2126
DOI: 10.14744/sigma.2025.1907
Viewed: (123) times
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Research Article
Title: HEAT GENERATION FROM 32650 CYLINDRICAL CELL BATTERY PACK AT VARIOUS LOAD AND SPEED CONDITIONS
Authors: Shashank GAWADE, Virendra BHOJWANI, Pradeep PATIL, M. ZUBAIRUDDIN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2127-2139
DOI: 10.14744/sigma.2024.00154
Viewed: (78) times
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Research Article
Title: STRATEGIC LOAD SCHEDULING IN SMART HOME: LEVERAGING IOT AND OPTIMIZATION ALGORITHMS FOR ENERGY COST REDUCTION
Authors: Ganesh SHIRSAT, Aniruddha MUKHERJEE, Ankit Kumar SHARMA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2140-2151
DOI: 10.14744/sigma.2024.00132
Viewed: (81) times
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Research Article
Title: TREATABILITY OF LANDFILL LEACHATE PRE-TREATED WITH A TWO-STAGE BIOLOGICAL TREATMENT PROCESS TO THE LEVEL OF RECEIVING ENVIRONMENT STANDARDS BY USING THE FENTON PROCESS
Authors: Uğur KURT, Ömer APAYDIN, Yaşar AVŞAR, Mustafa Talha GÖNÜLLÜ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2152-2163
DOI: 10.14744/sigma.2025.1914
Viewed: (121) times
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Research Article
Title: MALE LIFESTYLE HABITS AND IN VITRO FERTILIZATION OUTCOMES: THE EFFECTS OF ALCOHOL AND SMOKING ON SPERM CHARACTERISTICS AND PREGNANCY RATES
Authors: Tamara AL-BARQ, Manal GHANNAM, Bilgen KAYMAKAMZADE, Evren HINCAL, Muhammad FARMAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2164-2173
DOI: 10.14744/sigma.2025.1934
Viewed: (87) times
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Research Article
Title: EVALUATION OF HEALTH CARE SYSTEMS USING SUPERVISED AND UNSUPERVISED MACHINE LEARNING APPROACHES
Authors: Canan BULUT, Tuğba SÖNAL, Dilek KOLCA, Fatih TARLAK
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2174-2185
DOI: 10.14744/sigma.2024.00130
Viewed: (137) times
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Research Article
Title: COSINE KUMARASWAMY FAMILY OF DISTRIBUTIONS: PROPERTIES AND APPLICATIONS TO REAL-WORLD DATASETS
Authors: Ibrahim ALI, Alhaji Modu ISA, Sule Omeiza BASHIRU, Arum Kingsley CHINEDU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2186-2197
DOI: 10.14744/sigma.2025.1935
Viewed: (88) times
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Research Article
Title: ENHANCING BATTERY SAFETY AND PERFORMANCE THROUGH ADVANCED COOLING SOLUTIONS FOR ELECTRIC VEHICLES
Authors: Madhavi NERKAR, Govind Rai GOYAL, Aniruddha MUKHERJEE, Bhanu Pratap SONI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2198-2212
DOI: 10.14744/sigma.2025.1936
Viewed: (101) times
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Research Article
Title: STATIC AND DYNAMIC SLOPE STABILITY ANALYSES BASED ON FINITE ELEMENTS METHOD: THE EXAMPLE OF BIRECIK SLOPES
Authors: Ferit TAYLAN, Ali SARIIŞIK, Mustafa ULUKAVAK, Songül CAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2213-2233
DOI: 10.14744/sigma.2025.1937
Viewed: (109) times
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Research Article
Title: SIMULATION OF ENGINE OIL DRIVEN SECOND GRADE TERNARY HYBRID NANOFLUID FLOW SUBJECT TO THOMSON AND TROIAN SLIP VELOCITY ADDRESSING THE THERMOCONVECTION EFFECT
Authors: Tusar Kanti DAS, Mintu SAUD, Nayanto HAJONG, Bidyut KALITA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2234-2247
DOI: 10.14744/sigma.2025.1938
Viewed: (184) times
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Research Article
Title: EXPERIMENTAL AND MICROSTRUCTURAL INVESTIGATION OF GEOPOLYMER CONCRETE
Authors: Swapnil D. KURHADE, Subhash V. PATANKAR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2248-2262
DOI: 10.14744/sigma.2025.1939
Viewed: (198) times
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Research Article
Title: DOUBLE-SIDED BANDPASS FREQUENCY SELECTIVE SURFACE DESIGN FOR C BAND WLAN RADOME APPLICATIONS
Authors: Burak Can KIŞLA, Bilge ŞENEL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2263-2271
DOI: 10.14744/sigma.2025.1940
Viewed: (235) times
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Research Article
Title: COMPARATIVE STUDY OF FERMATEAN FUZZY SOFT SETS WITH NORMALIZED DISTANCES AND ITS APPLICATION IN DIAGNOSE INFECTIOUS DISEASES
Authors: Saika SHEWALI, Borah Manash JYOTI, Mahanta Dimpal JYOTI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2272-2278
DOI: 10.14744/sigma.2025.1941
Viewed: (248) times
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Research Article
Title: CENTRALIZED CONTROLLER-BASED ON OPTIMAL POWER FLOW (OPF) ALGORITHM FOR POWER MANAGEMENT IN MICROGRID SYSTEMS
Authors: Abumuslim KHUJAEV, Abbas UĞURENVER
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: December, Year: 2025, Volume: 43, Issue: 6, (DEC 2025), pp:2279-2293
DOI: 10.14744/sigma.2025.00027
Viewed: (504) times
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