Volume: 37, Issue: 2 (27 Articles)
Research Article
Title: HIERARCHICAL MATHEMATICAL MODELLING APPROACH FOR A CASE STUDY IN UNIVERSITY TIMETABLING
Authors: Yunus DEMİR, Cafer ÇELİK
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:323-339
DOI: x
Viewed: (1117) times
Abstract | Full Text| PDF
Research Article
Title: ANALYTICAL STUDY OF A TWO-PHASE REVOLVING SYSTEM OF NANOFLUID FLOW IN THE PRESENCE OF A MAGNETIC FIELD TO IMPROVE HEAT TRANSFER
Authors: Mosayeb GHOLINIA, Hossein JAVADI, Ali GATABI, Amirhossein KHODABAKHSHI, Davood Domiri GANJI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:341-360
DOI: x
Viewed: (962) times
Abstract | Full Text| PDF
Research Article
Title: THE EFFECT OF INCREASED INTAKE AIR PRESSURE OF A NATURALLY ASPIRATED DIESEL ENGINE ON PERFORMANCE AND EMISSIONS
Authors: Yusuf ÖZBAKIŞ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:361-372
DOI: x
Viewed: (1312) times
Abstract | Full Text| PDF
Research Article
Title: INVESTIGATION OF GAS PRESSURE EFFECT ON POWDER CHARACTERIZATION OF AZ31 ALLOY PRODUCED BY GAS ATOMIZATION METHOD
Authors: Mehmet AKKAŞ, Kamal Mohamed EM KARA, Tayfun ÇETİN, Mustafa BOZ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:373-380
DOI: x
Viewed: (972) times
Abstract | Full Text| PDF
Research Article
Title: MODELING AND OPTIMIZATION OF THE ORIGINAL OFFSET ON THE NC MACHINE TOOL
Authors: Farouk MESSAOUD, Mohamed RAHOU, Fethi SEBAA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:381-392
DOI: x
Viewed: (1004) times
Abstract | Full Text| PDF
Research Article
Title: INVESTIGATION OF MICROPOLAR FLUID FLOW AND HEAT TRANSFER IN A TWO-DIMENSIONAL PERMEABLE CHANNEL BY ANALYTICAL AND NUMERICAL METHODS
Authors: Mosayeb GHOLINIA, Saber GHOLINIA, Hossein JAVADI, Davood Domiri GANJI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:393-413
DOI: x
Viewed: (963) times
Abstract | Full Text| PDF
Technical Note
Title: ELECTRIC POWER GENERATION USING A THERMOELECTRIC GENERATOR FROM COOLANT FLUID OF INTERNAL COMBUSTION ENGINE OF CARS
Authors: Kianoush DOLATIASL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:415-422
DOI: x
Viewed: (915) times
Abstract | Full Text| PDF
Research Article
Title: ANALYSIS OF SURFACE ROUGHNESS, SOUND LEVEL, VIBRATION AND CURRENT WHEN MACHINING AISI 1040 STEEL
Authors: Abidin ŞAHİNOĞLU, Abdulkadir GÜLLÜ, İbrahim ÇİFTÇİ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:423-437
DOI: x
Viewed: (1250) times
Abstract | Full Text| PDF
Research Article
Title: SOLITON SOLUTIONS FOR KUDRYASHOV-SINELSHCHIKOV EQUATION
Authors: Abdullahi YUSUF, Mustafa INC, Mustafa BAYRAM
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:439-444
DOI: x
Viewed: (970) times
Abstract | Full Text| PDF
Research Article
Title: SOME NOTES ON INTEGRABILITY CONDITIONS, SASAKI METRICS AND OPERATORS ON (1,1)-TENSOR BUNDLE
Authors: Haşim ÇAYIR, Yasemin SOYLU, Hülya DURUR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:445-459
DOI: x
Viewed: (919) times
Abstract | Full Text| PDF
Research Article
Title: IMPROVED HERMITE-HADAMARD TYPE INEQUALITIES FOR CONVEX FUNCTIONS VIA KATUGAMPOLA FRACTIONAL INTEGRALS
Authors: Zeynep ŞANLI, Mehmet KUNT, Tuncay KÖROĞLU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:461-474
DOI: x
Viewed: (1045) times
Abstract | Full Text| PDF
Research Article
Title: ANALYSIS OF A BOUNDARY LAYER FLOW OF A NANOFLUID OVER AN INCLINED PLANE VIA ADM
Authors: Gbolahan BOLARIN, Abdulhakeem YUSUF, Samson Temitope ADEKUNLE, Yomi Monday AIYESIMI, Mohammed JIYA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:475-488
DOI: x
Viewed: (1092) times
Abstract | Full Text| PDF
Research Article
Title: THE BLAKLEY BASED SECRET SHARING APPROACH
Authors: Selda ÇALKAVUR, Fatih MOLLA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:489-494
DOI: x
Viewed: (1562) times
Abstract | Full Text| PDF
Research Article
Title: THE SOLUTION OF THE GOVERNING EQUATION OF THE BEAM ON LINEAR SPRING FOUNDATION MODELED BY A DISCONTINUITY FUNCTION
Authors: Duygu DÖNMEZ DEMİR, B. Gültekin SINIR, Emine KAHRAMAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:495-506
DOI: x
Viewed: (976) times
Abstract | Full Text| PDF
Research Article
Title: LACUNARY I_σ-STATISTICAL CONVERGENCE OF COMPLEX UNCERTAIN SEQUENCE
Authors: Ömer KİŞİ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:507-520
DOI: x
Viewed: (926) times
Abstract | Full Text| PDF
Research Article
Title: MULTIPLICATIVELY HARMONICALLY P-FUNCTIONS AND SOME RELATED INEQUALITIES
Authors: İmdat İŞCAN, Volkan OLUCAK
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:521-528
DOI: x
Viewed: (880) times
Abstract | Full Text| PDF
Research Article
Title: n-TIMES DIFFERENTIABLE PREINVEX AND PREQUASIINVEX FUNCTIONS
Authors: Huriye KADAKAL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:529-540
DOI: x
Viewed: (896) times
Abstract | Full Text| PDF
Research Article
Title: ON CYCLIC CODES AND CYCLIC LCD CODES FROM THE FAMILY OF GROUP RINGS ℤ4Cn
Authors: Mehmet Emin KÖROĞLU, Bayram Ali ERSOY
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:541-549
DOI: x
Viewed: (1184) times
Abstract | Full Text| PDF
Research Article
Title: A STUDY ON THE CHARACTERISTICS OF GÜMÜŞHANE SEISMICITY: ANALYSES OF REGION-TIME PARAMETERS
Authors: Serkan ÖZTÜRK, Aynur KAYA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:551-561
DOI: x
Viewed: (1103) times
Abstract | Full Text| PDF
Research Article
Title: THE DETERMINATION OF MICROORGANISMS IN INDOOR AND OUTDOOR ATMOSPHERE IN THE Y.T.U. DAVUTPASA CAMPUS
Authors: Feysa BAYSAL, Elanur ADAR, Suleyman SAKAR, Yasar NUHOGLU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:563-571
DOI: x
Viewed: (1085) times
Abstract | Full Text| PDF
Research Article
Title: A NEW METHOD FOR THE SIZE AND PERFORMANCE ANALYSES AND OPTIMIZATION OF THERMAL SYSTEMS: THE EXERGY DENSITY
Authors: Asım Sinan KARAKURT, Bahri ŞAHİN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:573-583
DOI: x
Viewed: (1052) times
Abstract | Full Text| PDF
Research Article
Title: COMPARISION OF HIGH STRENGTH AND ORDINARY REINFORCED CONCRETE SLABS UNDER FIXED BOUNDARY CONDITIONS BY YIELD LINE THEORY
Authors: Selçuk Emre GÖRKEM
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:585-600
DOI: x
Viewed: (972) times
Abstract | Full Text| PDF
Research Article
Title: TRAVEL DEMAND BEHAVIORAL MODEL AFTER DISASTER (EARTHQUAKE) IN TEHRAN, IRAN
Authors: Ali EDRISI, Maryam ZEINI, Mostafa ADRESI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:601-610
DOI: x
Viewed: (1207) times
Abstract | Full Text| PDF
Research Article
Title: AN EMPIRICAL STUDY FOR STATISTICAL EVALUATION OF PEAK RESPONSE DISPLACEMENTS
Authors: Gülçin TEKİN, Gülüm TANIRCAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:611-624
DOI: x
Viewed: (1142) times
Abstract | Full Text| PDF
Research Article
Title: EFFECT OF DIFFERENT PERMEABILITY REDUCING ADMIXTURE ON FLOWABILITY PERFORMANCE OF DIFFERENT TYPE OF MINERAL ADMIXTURE-CONTAINING MORTAR MIXTURES
Authors: Ali NEMATZADEH, Ece GEVEN, Süleyman ÖZEN, Metin İLHAN, Ali MARDANI AGHABAGLOU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:625-640
DOI: x
Viewed: (1485) times
Abstract | Full Text| PDF
Research Article
Title: EARTHQUAKE PERFORMANCE OF CONCRETE SLAB ON CONCRETE FACED ROCKFILL DAM INCLUDING HYDRODYNAMIC EFFECTS
Authors: Murat Emre KARTAL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:641-674
DOI: x
Viewed: (1485) times
Abstract | Full Text| PDF
Research Article
Title: GLASS FIBRE REINFORCED PRECAST CONCRETE CONTAINING HIGH CONTENT POZZOLANIC MATERIALS
Authors: Bahadur AMED, Nihat KABAY
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2019, Volume: 37, Issue: 2, (JUN 2019), pp:675-686
DOI: x
Viewed: (2550) times
Abstract | Full Text| PDF