Volume: 37, Issue: 4 (35 Articles)
Research Article
Title: ANALYSIS AND APPLICATIONS OF THE HYBRID WDM/TDM PASSIVE OPTICAL NETWORKS
Authors: Emine KOMAN, N. Özlem ÜNVERDİ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1059-1073
DOI: x
Viewed: (1357) times
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Research Article
Title: ANALYSIS OF MAGNETIC PERFORMANCE FOR MAGNETIZED PACKED AND UNPACKED BED
Authors: Zehra YILDIZ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1075-1086
DOI: x
Viewed: (890) times
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Research Article
Title: DESIGN AND DEVELOPMENT OF A HIGH GAIN DISCONE ANTENNA FOR 4G LTE APPLICATIONS
Authors: Aysu BELEN, Sezgin ÖRDEK, Hakan P. PARTAL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1087-1096
DOI: x
Viewed: (1674) times
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Research Article
Title: PERFORMANCE ENHANCEMENT OF LNA USING SERIES FEEDBACK
Authors: Oktay YURTTAKAL, Filiz GÜNEŞ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1097-1106
DOI: x
Viewed: (959) times
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Research Article
Title: DATA CLUSTERING BASED ON FUZZY C-MEANS AND CHAOTIC WHALE OPTIMIZATION ALGORITHMS
Authors: Hatice ARSLAN, Metin TOZ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1107-1128
DOI: x
Viewed: (1119) times
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Research Article
Title: THE EXISTENCE OF POSITIVE SOLUTIONS AND A LYAPUNOV TYPE INEQUALITY FOR BOUNDARY VALUE PROBLEMS OF THE FRACTIONAL CAPUTO-FABRIZIO DIFFERENTIAL EQUATIONS
Authors: Şuayip TOPRAKSEVEN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1129-1137
DOI: x
Viewed: (1101) times
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Research Article
Title: INVERTED DECOUPLING PID CONTROLLER DESIGN FOR A MIMO SYSTEM
Authors: Mehmet Ali ÜSTÜNER, Sezai TAŞKIN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1139-1151
DOI: x
Viewed: (1424) times
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Research Article
Title: AN ACCURATE AND EFFECTIVE IMPLEMENTATION OF PHYSICAL THEORY OF DIFFRACTION TO THE SHOOTING AND BOUNCING RAY METHOD VIA PREDICS TOOL
Authors: Özkan KIRIK, Caner ÖZDEMİR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1153-1166
DOI: x
Viewed: (1558) times
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Research Article
Title: ACCUMULATION OF RECYCLED WASTE TYRE WITHIN DIFFERENT RUBBERS: A KINETIC STUDY
Authors: Ahmet GÜNGÖR, İsmail Kutlugün AKBAY, Tonguç ÖZDEMİR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1169-1179
DOI: x
Viewed: (916) times
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Research Article
Title: VIBRATIONAL ANALYSIS AND HYDROGEN-BONDING EFFECTS ON THE VIBRATIONAL MODES OF ZWITTERIONIC DL-TRYPTOPHAN: IR SPECTROSCOPY AND DFT CALCULATIONS
Authors: Abdelali BOUKAOUD, Younes CHIBA, Mourad DEHBAOUI, Nacir GUECHI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1181-1198
DOI: x
Viewed: (1031) times
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Research Article
Title: STRUCTURAL CHARACTERIZATION OF ACID AND BASE-CATALYZED SILICA XEROGELS
Authors: Eda KELEŞ GÜNER, Abdulkadir ÖZER
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1199-1206
DOI: x
Viewed: (1010) times
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Research Article
Title: CHITOSAN-POLY(N,N-DIMETHYLACRYLAMIDE-CO-DIALLYL DIMETHYL AMMONIUM CHLORIDE) AND CHITOSAN-POLY(N,N-DIMETHYLACRYLAMIDE) SEMI-IPN FILMS: THE COMPARISON OF THEIR PROPERTIES
Authors: Sena GÜNAÇTI, Koray GÜRKAN, Gülten GÜRDAĞ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1207-1222
DOI: x
Viewed: (1151) times
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Research Article
Title: ENHANCEMENT OF THE SOLUBILITY OF HERBAL POLYPHENOLIC COMPOUNDS IN THE PRESENCE OF LACTIC ACID BUTYLETHER PEG (200)
Authors: Gulcemal YILDIZ, Bahire Filiz SENKAL, Ebru TEKNECI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1223-1233
DOI: x
Viewed: (780) times
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Research Article
Title: PHOTOCATALYTIC DEGRADATION OF METRONIDAZOLE USING BIOI–MWCNT COMPOSITES: SYNTHESIS, CHARACTERIZATION, AND OPERATIONAL PARAMETERS
Authors: Davoud BALARAK, Chinenye Adaobi IGWEGBE, Pius Chukwukelue ONYECHI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1235-1249
DOI: x
Viewed: (1126) times
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Research Article
Title: FLUORIDE CONTAMINATION IN GROUNDWATER AND ITS REMOVAL BY ADSORPTION AND ELECTROCOAGULATION PROCESSES
Authors: Benan YAZICI KARABULUT, Ayşe Dilek ATASOY, Mehmet İrfan YEŞİLNACAR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1251-1262
DOI: x
Viewed: (1276) times
Abstract | Full Text| PDF
Research Article
Title: ELECTROCHEMICAL STUDIES OF ZINC DEPOSITION CONDITIONS
Authors: Hayette FAID
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1263-1273
DOI: x
Viewed: (1083) times
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Research Article
Title: ON EV-DEGREE AND VE-DEGREE BASED TOPOLOGICAL PROPERTIES OF THE SIERPIŃSKI GASKET FRACTAL
Authors: Kerem YAMAÇ, Murat CANCAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1275-1280
DOI: x
Viewed: (919) times
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Research Article
Title: OPTIMAL BOUNDARY CONTROL FOR A SECOND STRAIN GRADIENT THEORY-BASED BEAM MODEL
Authors: Seda GÖKTEPE KÖRPEOĞLU, Ismail KUCUK, Kenan YILDIRIM
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1281-1292
DOI: x
Viewed: (868) times
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Research Article
Title: EULER-LAGRANGIAN DYNAMICAL SYSTEMS WITH RESPECT TO HORIZONTAL AND VERTICAL LIFTS ON TANGENT BUNDLE
Authors: Haşim ÇAYIR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1293-1300
DOI: x
Viewed: (885) times
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Research Article
Title: FUZZY CONE B-METRIC SPACES
Authors: Hande POŞUL, Elif KAPLAN, Servet KÜTÜKCÜ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1301-1314
DOI: x
Viewed: (854) times
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Research Article
Title: HERMITE-HADAMARD AND SIMPSON TYPE INEQUALITIES FOR MULTIPLICATIVELY HARMONICALLY 𝑷-FUNCTIONS
Authors: Mahir KADAKAL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1315-1324
DOI: x
Viewed: (950) times
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Research Article
Title: ON PERFECT CODES IN THE LEE-ROSENBLOOM-TSFASMAN-JAIN METRIC
Authors: Merve BULUT YILGÖR, Fatih DEMİRKALE
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1325-1333
DOI: x
Viewed: (967) times
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Research Article
Title: PARAMETER ESTIMATION TO AN ANEMIA MODEL USING THE PARTICLE SWARM OPTIMIZATION
Authors: Arshed A. AHMAD, Murat SARI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1335-1347
DOI: x
Viewed: (880) times
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Research Article
Title: THE EXISTENCE OF GLOBAL ATTRACTORS FOR SUSPENSION BRIDGE EQUATIONS
Authors: Mohamed FERHAT, Fatima Zohra MAHDI, Ali HAKEM
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1349-1366
DOI: x
Viewed: (875) times
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Research Article
Title: ASYMPTOTICALLY 𝓘-STATISTICAL EQUIVALENT FUNCTIONS DEFINED ON AMENABLE SEMIGROUPS
Authors: Uğur ULUSU, Erdinç DÜNDAR, Bünyamin AYDIN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1367-1373
DOI: x
Viewed: (1127) times
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Research Article
Title: ACCUMULATION OF METALS IN SOME WILD AND CULTIVATED MUSHROOM SPECIES
Authors: Sibel YILDIZ, Ayşenur GÜRGEN, Uğur ÇEVİK
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1375-1384
DOI: x
Viewed: (894) times
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Research Article
Title: CRITICAL BUCKLING LOAD OF THE SIDE WALLS OF CABINET FURNITURE
Authors: Jerzy SMARDZEWSKI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1385-1395
DOI: x
Viewed: (893) times
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Research Article
Title: QUALITY CONTROL CHARTS FOR MONITORING PERFORMANCE OF HOSPITAL CALL CENTER
Authors: Hakan ÖZTÜRK, Naci MURAT, Sermin ELEVLİ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1397-1410
DOI: x
Viewed: (1541) times
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Research Article
Title: GOAL PROGRAMMING APPROACH FOR THE RADIOLOGY TECHNICIAN SCHEDULING PROBLEM
Authors: Evrencan ÖZCAN, Tuğba DANIŞAN, Rabia YUMUŞAK, Şeyda GÜR, Tamer EREN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1411-1420
DOI: x
Viewed: (1320) times
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Research Article
Title: TESTING OF TREE-SEED ALGORITHM ON P-MEDIAN BENCHMARK PROBLEMS
Authors: İbrahim Miraç ELİGÜZEL, Eren ÖZCEYLAN, Cihan ÇETİNKAYA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1421-1434
DOI: x
Viewed: (1149) times
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Research Article
Title: DATA ENVELOPMENT ANALYSIS BASED METAMODELING FOR MULTI OBJECTIVE SIMULATION OPTIMIZATION IN A MANUFACTURING LINE
Authors: Onder BELGIN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1435-1449
DOI: x
Viewed: (1184) times
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Research Article
Title: DESIGN FOR 3D CITY MODEL MANAGEMENT USING REMOTE SENSING AND GIS: A CASE STUDY FOR THE GOLDEN HORN IN ISTANBUL, TURKEY
Authors: İsmail BÜYÜKSALİH, Mehmet ALKAN, Cem GAZİOĞLU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1451-1466
DOI: x
Viewed: (1196) times
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Research Article
Title: MONITORING THE SPATIO-TEMPORAL TRENDS OF GROUNDWATER QUALITATIVE PARAMETERS THROUGH GEOSTATISTICAL TOOLS
Authors: Behnam KHORRAMI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1467-1479
DOI: x
Viewed: (1139) times
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Research Article
Title: EVALUATION OF THE ERROR PERFORMANCE OF THE IEEE802.16 STANDARD BASED ON A HIDDEN MARKOV MODEL
Authors: Shaghayegh KORDNOORI, Hamidreza MOSTAFAEI, Mohammad Hassan BEHZADI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1481-1496
DOI: x
Viewed: (1229) times
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Research Article
Title: BAYESIAN NETWORK MODEL OF TURKISH FINANCIAL MARKET FROM YEAR-TO-SEPTEMBER 30TH OF 2016
Authors: Ersin SENER, Hasan Aykut KARABOGA, Ibrahim DEMIR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 4, (DEC 2019), pp:1497-1511
DOI: x
Viewed: (1200) times
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