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Volume: 38, Issue Number: 3

Volume: 38, Issue: 3 (39 Articles)

Research Article
Title: RELATIONAL DESCRIPTION OF AN ADSORPTION SYSTEM BASED ON ISOTHERM, ADSORPTION DENSITY, ADSORPTION POTENTIAL, HOPPING NUMBER AND SURFACE COVERAGE
Authors: Chukwunonso O. ANIAGOR, Matthew Chukwudi MENKITI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1073-1098
DOI: x
Viewed: (486) times
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Research Article
Title: STATISTICAL MODELLING OF THE ADSORPTIVE DEPHENOLATION OF PETROLEUM INDUSTRY WASTEWATER USING IONIC LIQUID TREATED CLAY
Authors: Matthew N. ABONYI, Chukwunonso O. ANIAGOR, Matthew Chukwudi MENKITI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1099-1112
DOI: x
Viewed: (434) times
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Research Article
Title: POLY(MPAEMA)/CLAY NANOCOMPOSITES: SYNTHESIS, CHARACTERIZATION, STRUCTURAL, AND THERMAL PROPERTIES
Authors: Nevin ÇANKAYA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1113-1120
DOI: x
Viewed: (435) times
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Research Article
Title: LITHIUM TETRABORATE PRODUCTION FROM THE REACTION OF BORIC ACID AND LITHIUM CARBONATE USING CARBON DIOXIDE
Authors: Ali YALÇIN, Mehmet GÖNEN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1121-1132
DOI: x
Viewed: (883) times
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Research Article
Title: SYNTHESIS, SPECTROSCOPIC AND THERMAL CHARACTERIZATION OF NEW OXO METHACRYLATE-CONTAINING POLYMERS
Authors: Nevin ÇANKAYA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1133-1141
DOI: x
Viewed: (362) times
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Research Article
Title: COMPARATIVE STUDIES ON REMOVAL OF TURBID-METRIC PARTICLES (TDSP) USING ANIMAL BASED CHITO-PROTEIN AND ALUMINIUM SULFATE ON PAINT WASTEWATER (PWW)
Authors: M. Ikenna EJIMOFOR, Matthew Chukwudi MENKITI, Ifechukwu G. EZEMAGU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1143-1159
DOI: x
Viewed: (370) times
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Research Article
Title: BIOSORPTION OF PHENOL USING MODIFIED BARLEY HUSK: STUDIES ON EQUILIBRIUM ISOTHERM, KINETICS, AND THERMODYNAMICS OF INTERACTIONS
Authors: Davoud BALARAK, Kethineni CHANDRIKA, Chinenye Adaobi IGWEGBE, Shahin AHMADI, Chinedu Josiah UMEMBAMALU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1161-1177
DOI: x
Viewed: (899) times
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Research Article
Title: COMPARISON OF OZONATION, ADSORPTION AND AIR STRIPPING PROCESS FOR AMMONIA NITROGEN REMOVAL FROM REAL TEXTILE WASTEWATER
Authors: Yalcin GUNES, Ferhat BARUT, Gul KAYKIOGLU, Ali Riza DINCER
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1179-1189
DOI: x
Viewed: (467) times
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Research Article
Title: LINKAGE OF OPERATIONAL PARAMETERS AND MICROBIOME IN ANAEROBIC CO-DIGESTION WITH GRAPHITE
Authors: Sevgi DEMİREL, Öznur Begüm GÖKÇEK, Hamdi MURATÇOBANOĞLU
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1191-1201
DOI: x
Viewed: (484) times
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Research Article
Title: ENVIRONMENTAL TOXICITY CHARACTERISTICS OF NEMRUT VOLCANISM PYROCLASTIC, BITLIS/TURKEY CASE
Authors: Edip AVŞAR, Ercan IŞIK
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1203-1215
DOI: x
Viewed: (581) times
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Research Article
Title: CHROMIUM (Cr(VI)) REMOVAL FROM WATER WITH BENTONITE-MAGNETITE NANOCOMPOSITE USING RESPONSE SURFACE METHODOLOGY (RSM)
Authors: Pınar BELİBAĞLI, Buşra Nur ÇİFTCİ, Yağmur UYSAL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1217-1233
DOI: x
Viewed: (327) times
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Research Article
Title: COMPARISON OF PERFORMANCES OF BIOLOGICAL NUTRIENT REMOVAL SYSTEMS FOR MUNICIPAL WASTEWATER TREATMENT
Authors: Selami DEMİR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1235-1248
DOI: x
Viewed: (902) times
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Research Article
Title: SPECTRA AND PSEUDOSPECTRA OF THE DIRECT SUM OPERATORS
Authors: Zameddin I. ISMAILOV, Pembe IPEK AL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1251-1259
DOI: x
Viewed: (524) times
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Research Article
Title: ON STABILITY OF SOME INTEGRAL EQUATIONS IN 𝟐-BANACH SPACES
Authors: El-Sayed El-HADY, Süleyman ÖĞREKÇİ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1261-1268
DOI: x
Viewed: (407) times
Abstract | Full Text| PDF

Research Article
Title: ANALYSIS OF RANDOM DISCRETE TIME LOGISTIC MODEL
Authors: Mehmet MERDAN, Şeyma ŞİŞMAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1269-1298
DOI: x
Viewed: (367) times
Abstract | Full Text| PDF

Research Article
Title: A NUMERICAL ALGORITHM BASED ON ULTRASPHERICAL WAVELETS FOR SOLUTION OF LINEAR AND NONLINEAR KLEIN-GORDON EQUATIONS
Authors: Neslihan OZDEMIR, Aydin SECER
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1307-1319
DOI: x
Viewed: (448) times
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Research Article
Title: ANALYZING THE EFFECTS OF DIFFERENT TOOL PATHS ON FORM ERRORS IN THE MILLING OF FREEFORM SURFACES
Authors: Erkan BAHÇE, Burak ÖZDEMİR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1321-1332
DOI: x
Viewed: (407) times
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Research Article
Title: INVESTIGATION OF MECHANICAL AND METALLOGRAPHIC PROPERTIES OF TWO DIFFERENT ALUMINUM ALLOYS JOINED WITH FRICTION STIR WELDING METHOD USING DIFFERENT WELDING PARAMETERS
Authors: Şeref ÖCALIR, Uğur EŞME, Cem BOĞA, Mustafa Kemal KÜLEKCİ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1333-1349
DOI: x
Viewed: (448) times
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Research Article
Title: ROBUST DELAY-DEPENDENT 𝑯∞ CONTROL DESIGN FOR UNCERTAIN TAKAGI-SUGENO TIME-DELAY SYSTEMS
Authors: Serdar COSKUN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1351-1368
DOI: x
Viewed: (385) times
Abstract | Full Text| PDF

Research Article
Title: EFFECTS OF 2019 NOVEL CORONAVIRUS (COVID-19) OUTBREAK ON GLOBAL ENERGY DEMAND AND THE ELECTRICITY PRODUCTION WITH RENEWABLES: A COMPREHENSIVE SURVEY
Authors: Kemal KOCA, Mustafa Serdar GENÇ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1369-1380
DOI: x
Viewed: (626) times
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Research Article
Title: DYNAMICS ANALYSIS OF A TRUSS SYSTEM MODELLED BY THE FINITE ELEMENT METHOD IN THE FREQUENCY DOMAIN
Authors: Mehmet BOZCA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1381-1398
DOI: x
Viewed: (399) times
Abstract | Full Text| PDF

Research Article
Title: A RESEARCH FOR BACTERIAL SELF-HEALING IN METAKAOLIN BASED GEOPOLYMER MORTARS
Authors: Berivan YILMAZER POLAT, Mucteba UYSAL, Volkan KORKMAZ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1401-1414
DOI: x
Viewed: (744) times
Abstract | Full Text| PDF

Research Article
Title: THE SIZE OPTIMIZATION OF STEEL BRACED BARREL VAULT STRUCTURE BY USING RAO-1 ALGORITHM
Authors: Tayfun DEDE, Maksym GRZYWIŃSKI, Ravipudi Venkata RAO, Barbaros ATMACA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1415-1425
DOI: x
Viewed: (636) times
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Research Article
Title: CYCLIC BEHAVIOR OF COMPOSITE COLUMN-REINFORCED CONCRETE BEAM JOINTS
Authors: Fethi ŞERMET, Emre ERCAN, Emin HÖKELEKLİ, Bengi ARISOY
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1427-1445
DOI: x
Viewed: (1035) times
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Research Article
Title: ASSESSMENT OF PROJECT CHARACTERISTICS AFFECTING RISK OCCURRENCES IN CONSTRUCTION PROJECTS USING FUZZY AHP
Authors: Ozan OKUDAN, Cenk BUDAYAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1447-1462
DOI: x
Viewed: (511) times
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Research Article
Title: THE EFFECT OF CONCRETE SLAB THICKNESS ON SEISMIC PERFORMANCE OF CONCRETE FACE SLAB OF CFR DAMS
Authors: Murat Emre KARTAL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1463-1480
DOI: x
Viewed: (497) times
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Research Article
Title: DETERMINATION OF PRIORITY REGIONS FOR REHABILITATION IN WATER NETWORKS BY MULTIPLE CRITERIA DECISION MAKING METHODS
Authors: Şeymanur GÜL, Mahmut FIRAT
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1481-1494
DOI: x
Viewed: (449) times
Abstract | Full Text| PDF

Research Article
Title: EFFECT OF DIFFERENT ABUTMENT MATERIALS ON STRESS DISTRIBUTION IN PERIPHERAL BONE AND DENTAL IMPLANT SYSTEM
Authors: Merve TERZİ, Yılmaz GÜVERCİN, Sabit Melih ATEŞ, Dursun Murat SEKBAN, Murat YAYLACI
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1495-1507
DOI: x
Viewed: (814) times
Abstract | Full Text| PDF

Research Article
Title: MODELING AND ANALYSIS OF SINGLE-PHASE INDUCTION MOTOR DRIVE FOR VARIABLE CAPACITY CONTROL OF A REFRIGERATOR COMPRESSOR
Authors: Ali Asil ÖNCELER, Sezai TAŞKIN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1509-1526
DOI: x
Viewed: (956) times
Abstract | Full Text| PDF

Research Article
Title: HISTORICAL AND MONTE CARLO SIMULATION-BASED RELIABILITY ASSESSMENT OF POWER DISTRIBUTION SYSTEMS
Authors: Mohammed WADI, Mustafa BAYSAL, Abdulfetah SHOBOLE, Mehmet Rida TUR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1527-1540
DOI: x
Viewed: (727) times
Abstract | Full Text| PDF

Research Article
Title: ON COMPARISON OF MODELS FOR COUNT DATA WITH EXCESSIVE ZEROS IN NON-LIFE INSURANCE
Authors: Övgücan KARADAĞ ERDEMİR, Özge KARADAĞ
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1543-1553
DOI: x
Viewed: (726) times
Abstract | Full Text| PDF

Research Article
Title: LAMINAR FLOW OVER SLOPED DOWNSTREAM HEATED BOTTOM WALL BEHIND A BACKWARD-FACING STEP
Authors: Seyfettin BAYRAKTAR
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1555-1566
DOI: x
Viewed: (672) times
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Research Article
Title: HUMAN FACTORS IMPLICATIONS ON SHIP BRIDGE DESIGN
Authors: Burkay ALAN, Oğuz Salim SÖĞÜT
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1567-1579
DOI: x
Viewed: (667) times
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Research Article
Title: CLASSIFICATION OF TURKISH TWEETS BY DOCUMENT VECTORS AND INVESTIGATION OF THE EFFECTS OF PARAMETER CHANGES ON CLASSIFICATION SUCCESS
Authors: Metin BİLGİN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1581-1592
DOI: x
Viewed: (755) times
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Research Article
Title: EVALUATION OF THE POTENTIAL OF THE INTERNET OF THINGS IN HEALTH SERVICES WITH MULTI CRITERIA DECISION-MAKING METHODS
Authors: Burak YEŞILYURT, Kübra KARAKUŞ, Şeyda GÜR, Tamer EREN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1595-1606
DOI: x
Viewed: (970) times
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Research Article
Title: COMPARISON OF PARAMETER ESTIMATION METHODS IN WEIBULL DISTRIBUTION
Authors: Esin KÖKSAL BABACAN, Samet KAYA
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1609-1621
DOI: x
Viewed: (1217) times
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Research Article
Title: A GENERAL OVERVIEW ON THE REGION-TIME BEHAVIORS OF THE RECENT EARTHQUAKE ACTIVITY IN THE MARMARA REGION OF TURKEY
Authors: Serkan ÖZTÜRK, Serpil GERDAN
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1623-1641
DOI: x
Viewed: (897) times
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Research Article
Title: BIOACTIVITY, PHYSICOCHEMICAL AND ANTIMICROBIAL PROPERTIES OF VINEGAR MADE FROM PERSIMMON (DIOSPYROS KAKI) PEELS
Authors: Yüksel BAYRAM, Kübra OZKAN, Osman SAGDIC
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1643-1652
DOI: x
Viewed: (1079) times
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Research Article
Title: CHARACTERIZATIONS OF HELICES BY USING THEIR DARBOUX VECTORS
Authors: Mustafa DÜLDÜL, Bahar UYAR DÜLDÜL
Journal: Sigma Journal of Engineering and Natural Sciences
Issue: Name: Regular, Year: 2020, Volume: 38, Issue: 3, (SEP 2020), pp:1299-1306
DOI: x
Viewed: (1421) times
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