Volume: 38, Issue: 2 (40 Articles)
Research Article
Title: RELIABILITY ANALYSIS OF THE MECHANICAL PROPERTIES OF 30MnB4 HIGH STRENGTH STEEL BOLTS UNDER STATIC LOADING CONDITIONS
Authors: Mehmet BOZCA, Umut KINIT
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:495-512
DOI: x
Viewed: (927) times
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Research Article
Title: NUMERICAL INVESTIGATION OF WAVES GENERATED BY OSCILLATING SIDEWALL OF A TANK: A LATTICE-BOLTZMANN STUDY
Authors: Hamed Akhtari SHISHAVAN, Iraj MIRZAEE, Nader POURMAHMOUD
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:513-526
DOI: x
Viewed: (722) times
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Research Article
Title: SIMULATION OF SHRINKAGE EFFECT IN DRYING OF FOOD PRODUCTS IN HOT-AIR DRYER
Authors: Burak TURKAN, Akin Burak ETEMOGLU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:527-544
DOI: x
Viewed: (996) times
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Research Article
Title: INFLUENCE OF IMPERFECT CONTACT CONDITIONS ON THE TORSIONAL WAVE DISPERSION IN PRE-STRAINED MANY LAYERED HOLLOW CYLINDER MADE OF HIGHLY ELASTIC MATERIALS
Authors: Eyyüp KARAFAKI, Tamer KEPÇELER
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:545-561
DOI: x
Viewed: (726) times
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Research Article
Title: NUMERICAL INVESTIGATION OF THE EFFECT OF SECONDARY INLET PLACE ON THE FLOW PROPERTIES IN A CO-AXIAL BOUNDED JET
Authors: Salar IMANMEHR, Iraj MIRZAEE, Nader POURMAHMOUD
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:563-579
DOI: x
Viewed: (708) times
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Research Article
Title: THERMODYNAMICS OF A CHALCONE-BASED POLYMER BY INVERSE GAS CHROMATOGRAPHY METHOD
Authors: Ayşegül Ç. ADIGÜZEL, Burak KORKMAZ, Fatih ÇAKAR, Özlem CANKURTARAN, Yeşim HEPUZER GÜRSEL, Bahire Filiz ŞENKAL, Ferdane KARAMAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:581-588
DOI: x
Viewed: (937) times
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Review Article
Title: MODELING AND OPTIMIZATION OF ZINC RECOVERY FROM ENYIGBA SPHALERITE IN A BINARY SOLUTION OF ACETIC ACID AND HYDROGEN PEROXIDE
Authors: Ikechukwu A. NNANWUBE, Judith N. UDEAJA, Okechukwu D. ONUKWULI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:589-601
DOI: x
Viewed: (779) times
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Research Article
Title: CFD ANALYSIS OF MINI VENTURI-TYPE AIR FLOWMETERS FOR LAB-SCALE APPLICATIONS
Authors: Selami DEMİR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:603-612
DOI: x
Viewed: (853) times
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Research Article
Title: CUT DIAMETER OF CYCLONE SEPARATORS: PART I. MULTIPLE NONLINEAR REGRESSION
Authors: Selami DEMİR, Aykut KARADENİZ, Kadir ULUTAŞ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:613-622
DOI: x
Viewed: (1279) times
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Research Article
Title: COMPARISON OF CHEMICAL AND ELECTROCHEMICAL TREATMENT PROCESSES FOR WOOL YARN DYEING EFFLUENTS
Authors: Kubra ULUCAN ALTUNTAS, Fatih ILHAN, Can DOGAN, Ugur KURT
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:623-636
DOI: x
Viewed: (784) times
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Research Article
Title: EFFECT OF QUARRY WASTE POWDER ON THE FRESH AND HARDENED PROPERTIES OF CEMENT MORTAR
Authors: Nihat KABAY, Serhat MUSAOĞULLARI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:639-648
DOI: x
Viewed: (985) times
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Research Article
Title: A COMPARATIVE STUDY ON THE PHYSICAL AND MECHANICAL PROPERTIES OF ALKALI ACTIVATED MATERIALS
Authors: Nihat KABAY, Nausad MIYAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:649-658
DOI: x
Viewed: (878) times
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Research Article
Title: BUCKLING OF RECTANGULAR FSDT PLATES RESTING ON ORTHOTROPIC FOUNDATION BY MIXED FEM
Authors: Akif KUTLU, Mehmet H. OMURTAG
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:659-666
DOI: x
Viewed: (831) times
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Research Article
Title: A DOUBLE RECEDING CONTACT PROBLEM OF A FUNCTIONALLY GRADED LAYER AND A HOMOGENEOUS ELASTIC LAYER RESTING ON A WINKLER FOUNDATION
Authors: Ahmet BİRİNCİ, Aysegul EYUBOGLU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:667-686
DOI: x
Viewed: (698) times
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Research Article
Title: FINITE ELEMENT ANALYSIS OF THE MECHANICAL BEHAVIOR OF REINFORCED CONCRETE (RC) BEAMS STRENGTHENED BY FIBER REINFORCED POLYMERS (FRP)
Authors: Ceren GÖKCEN, Emin HÖKELEKLİ, Emre ERCAN, Mehmet ERKEK
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:687-702
DOI: x
Viewed: (988) times
Abstract | Full Text| PDF
Research Article
Title: SUSPENDED SEDIMENT LOAD PREDICTION IN RIVERS BY USING HEURISTIC REGRESSION AND HYBRID ARTIFICIAL INTELLIGENCE MODELS
Authors: Banu YILMAZ, Egemen ARAS, Murat KANKAL, Sinan NACAR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:703-714
DOI: x
Viewed: (757) times
Abstract | Full Text| PDF
Research Article
Title: IMPACT SCORE TECHNIQUE AND SERVQUAL COMPARISON FOR PUBLIC TRANSPORTATION SERVICE QUALITY
Authors: Güzin AKYILDIZ ALÇURA, S. Şeyma KUŞAKCI GÜNDOĞAR, Cankat TANRIVERDİ, Gülhayat GÖLBAŞI ŞİMŞEK, Mustafa GÜRSOY
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:715-726
DOI: x
Viewed: (831) times
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Research Article
Title: AN ANALYSIS FOR MODE CHOICE PREFERENCES BETWEEN ANKARA AND ISTANBUL
Authors: Mustafa GÜRSOY, Sümeyya Şeyma KUŞAKCI GÜNDOĞAR, Sami Cankat TANRIVERDİ, Güzin AKYILDIZ ALÇURA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:727-739
DOI: x
Viewed: (742) times
Abstract | Full Text| PDF
Research Article
Title: INVESTIGATION OF HEAD AND BED MORTAR REGION EFFECT IN MICRO SCALE MODELLING OF MASONRY WALLS
Authors: Muhammet KARATON, Kağan ÇANAKÇI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:741-756
DOI: x
Viewed: (679) times
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Research Article
Title: CHANGES OF ELASTIC MODULUS OF MASONRY STRUCTURES DUE TO DIFFERENT DAMAGE RATIOS
Authors: Yunus GÜNER, Emre ERCAN, Ayhan NUHOĞLU, Duygu ÖZTÜRK
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:757-767
DOI: x
Viewed: (785) times
Abstract | Full Text| PDF
Research Article
Title: DEVELOPMENT OF A COMPOSITE ROAD TRAFFIC SAFETY PERFORMANCE INDEX: A BASIS FOR COMPARING TURKISH METROPOLITAN CITIES
Authors: Yunus Emre YILMAZ, Mustafa GÜRSOY
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:769-784
DOI: x
Viewed: (737) times
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Research Article
Title: THE UTILISATION OF SPECIAL CAUSE CONTROL CHARTS IN THE PRESENCE OF AUTOCORRELATED DATA
Authors: Sermin ELEVLİ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:787-793
DOI: x
Viewed: (753) times
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Research Article
Title: SELECTION OF SOCKS EXPORT MARKETS FOR TURKEY USING MULTI-CRITERIA DECISION MAKING METHODS
Authors: Aytaç YILDIZ, Ahmet ÖZBEK
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:795-815
DOI: x
Viewed: (753) times
Abstract | Full Text| PDF
Research Article
Title: NORM SHIFTING: AN AGENT-BASED MODEL
Authors: Zafer EREN, C. Erhan BOZDAĞ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:817-833
DOI: x
Viewed: (780) times
Abstract | Full Text| PDF
Research Article
Title: A COMPARATIVE PERSPECTIVE IN SUSTAINABLE SUPPLIER SELECTION BY INTEGRATED MCDM TECHNIQUES
Authors: Ahmet ÇALIK
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:835-852
DOI: x
Viewed: (828) times
Abstract | Full Text| PDF
Research Article
Title: DEVELOPING OPTIMIZATION MODELS TO EVALUATE HEALTHCARE SYSTEMS
Authors: Abdulkadir ATALAN, Nergis Feride KAPLAN DÖNMEZ, Cem Çağrı DÖNMEZ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:853-873
DOI: x
Viewed: (899) times
Abstract | Full Text| PDF
Research Article
Title: INVESTIGATION OF THE PROPERTIES OF STARCH OBTAINED FROM TARO (COLOCASIA ESCULENTA L. SCHOTT) GROWN IN MERSIN, TURKEY
Authors: Burcu KAHRAMAN, Muhammet ARICI, Omer Said TOKER
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:875-887
DOI: x
Viewed: (1125) times
Abstract | Full Text| PDF
Research Article
Title: ANALYSIS THE GEOMATICS DISCIPLINE IN TURKEY
Authors: Faruk YILDIRIM, Volkan BASER
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:889-906
DOI: x
Viewed: (1030) times
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Research Article
Title: EVALUATION OF THE EFFECTS OF LAND COVER CHANGES AND URBANIZATION ON LAND SURFACE TEMPERATURE: A REMOTE SENSING STUDY OF SUB-WATERSHED OF OUED FEKAN, NORTHWEST ALGERIA
Authors: Mohammed CHRAIR, A. KHALDI, M. A. HAMADOUCHE, A. HAMIMED, Flavie CERNESSON, Mehmet ALKAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:907-926
DOI: x
Viewed: (1146) times
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Research Article
Title: TEMPORAL NDVI CHANGE DETECTION OF NEPAL USING MODIS IMAGERY
Authors: Jayanand BHATT, Mehmet ALKAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:927-943
DOI: x
Viewed: (1079) times
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Research Article
Title: EVALUATION OF EXCESS LIFETIME CANCER RISK CAUSED BY EXTERNAL EXPOSURE DUE TO NATURAL RADIOACTIVITY IN BOLU, TURKEY
Authors: Naz Zeynep ATEŞ, Kübra BAYRAK, M. Ergun TURGAY, Erol KAM
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:945-954
DOI: x
Viewed: (894) times
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Research Article
Title: SOME PHYSICAL PROPERTIES OF CZO THIN FILMS PRODUCED BY A NOVEL MAGNETIC SPIN COATING TECHNIQUE
Authors: M. Fatih GÖZÜKIZIL, Sinan TEMEL, Nurgül ÖZBAY
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:955-960
DOI: x
Viewed: (885) times
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Research Article
Title: EDUCATIONAL DATA MINING METHODS FOR TIMSS 2015 MATHEMATICS SUCCESS: TURKEY CASE
Authors: Enes FİLİZ, Ersoy ÖZ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:963-977
DOI: x
Viewed: (1057) times
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Research Article
Title: IN-SITU WALL CONCRETE QUALITY USING VELOCITY FIELD-DEPENDENT MIGRATION IN ZIGANA AND TORUL TUNNELS
Authors: Işıl SARIÇİÇEK, Aysel ŞEREN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:979-993
DOI: x
Viewed: (910) times
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Research Article
Title: A GALERKIN-TYPE METHOD FOR SOLUTIONS OF PANTOGRAPH-TYPE VOLTERRA-FREDHOLM INTEGRO-DIFFERENTIAL EQUATIONS WITH FUNCTIONAL UPPER LIMIT
Authors: Şuayip YÜZBAŞI, Murat KARAÇAYIR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:995-1005
DOI: x
Viewed: (948) times
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Research Article
Title: THE LOCAL GENERALIZED DERIVATIVE AND MITTAG-LEFFLER FUNCTION
Authors: Juan E. Nápoles VALDES, Paulo M. GUZMÁN, Luciano M. LUGO, Artion KASHURI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:1007-1017
DOI: x
Viewed: (1143) times
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Research Article
Title: β-SELECTION PROPERTIES IN DITOPOLOGICAL TEXTURE SPACES
Authors: Memet KULE, Şenol DOST
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:1019-1029
DOI: x
Viewed: (944) times
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Research Article
Title: A THREE STEPS ITERATIVE PROCESS FOR APPROXIMATING THE FIXED POINTS OF MULTIVALUED GENERALIZED α-NONEXPANSIVE MAPPINGS IN UNIFORMLY CONVEX HYPERBOLIC SPACES
Authors: İbrahim KARAHAN, Lateef Olakunle JOLAOSO
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:1031-1050
DOI: x
Viewed: (1052) times
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Research Article
Title: PREDICTION OF DEMOGRAPHICAL CHARACTERISTICS USING K-MEANS ALGORITHMS
Authors: Murat SARI, Can TUNA, Ibrahim DEMIR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:1051-1059
DOI: x
Viewed: (999) times
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Research Article
Title: A NOTE ON ASYMPTOTIC BEHAVIOR OF FRACTIONAL DIFFERENTIAL EQUATIONS
Authors: Hakan ADIGÜZEL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 2, (JUN 2020), pp:1061-1067
DOI: x
Viewed: (1392) times
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