Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Gul, Muhammet(82)
- Akkurt, Nevzat(67)
- Güler, Ömer(66)
- Baskonus, Haci Mehmet(62)
- Bulut, Hasan(60)
- Tekin, H.O.(52)
- ALMisned, Ghada(49)
- Yucesan, Melih(43)
- Yildirim, Numan(42)
- Yildirim, Nuran Cikcikoglu(38)
- Paksoy, Mehmet Yavuz(36)
- Serdar, Osman(36)
- Zengin, Gokhan(36)
- Ince, Muharrem(34)
- Celik, Erkan(33)
- Benzer, Fulya(32)
- Kocabaş, Mehmet(30)
- Sulaiman, Tukur Abdulkadir(30)
- Tanyol, Mehtap(29)
- Yildirim, Ozal(28)
- Aslan, Naim(26)
- Kök, Mediha(26)
- Özkul, İskender(26)
- Ates, Mehmet(25)
- Danabas, Durali(25)
- Kutluyer, Filiz(25)
- Can, Erkan(24)
- Kutlu, Banu(23)
- Onat, Onur(23)
- Demir, Veysel(22)
- Erten, Fusun(22)
- Guler, Omer(22)
- Say, Yakup(22)
- Güler, Seval Hale(21)
- Yaman, Mehmet(21)
- Baykal, Duygu Sen(20)
- Sançar, Taylan(20)
- Susam, Selim Orhun(20)
- Cakilcioglu, Ugur(19)
- Orhan, Cemal(19)
Yayınlar
- MakaleYalnız künye2018Anonymous Processors with Synchronous Shared Memory: Monte Carlo Algorithms
Chlebus, Bogdan S.; De Marco, Gianluca; Talo, Muhammed; Aspnes, J; Bessani, A; Felber, P; Leitao, J
AtıfOpenAlex2
İncele - MakaleAçık Erişim2018On the exact solitary wave solutions to the long-short wave interaction system
Baskonus, Haci Mehmet; Sulaiman, Tukur Abdulkadir; Bulut, Hasan; Cattani, C; Atangana, A; Bulut, H; Hammouch, Z; Baskonus, HM; Mekkaoui, T; Agoujil, S
AtıfOpenAlex16İncele - MakaleAçık Erişim2018Scopus SJRQ2Pollen morphology of Scaligeria DC. (Apiaceae) in Turkey
Baldemir, Ayse; Alan, Senol; Sahien, Aydan Acar; Paksoy, Mehmet Yavuz; Pinar, N. Munevver
In this study, the pollen morphology of all Scaligeria DC. species distributed in Turkey were studied with light and scanningelectron microscopy for the first time. The aim is to contribute to knowledge of the variation among seven Scaligeria species, which havetaxonomic problems, based on pollen morphological characteristics by population analysis. The pollen is radially symmetrical, isopolar,and tricolporate in all examined species. Pollen grains are prolate and subprolate with the polar axes ranging from 18.4 to 37 μm andthe equatorial axes from 9.8 to 30 μm. Their polar shapes are triangular, triangular to subcircular, circular to subcircular, or triangularto subtriangular. Several types of exine ornamentations have been observed on pollen by scanning electron microscopy. Numericalanalysis showed that pore structure, the ratio of P/E, and ornamentation in the polar and equatorial views are most valuable variablesfor separating the Scaligeria species. All S. lazica taxa were grouped together and S. capillifolia and S. tripartita were the external taxadue to cluster and PCA analysis.
AtıfOpenAlex13TR Dizin2
İncele - MakaleYayıncıda açık erişim2018Scopus SJRQ1Investigation of usability of limonite aggregate in heavy-weight concrete production
Esen, Yuksel; Dogan, Zulfu Murat
Limonite (Fe2O3.xH(2)O) is a soft or brown, hard iron mineral, usually in yellow colour. It is also used as a pigment since it contains iron ore. It is believed that it can also be used in the production of heavy concrete due to its 60% iron ore content. In this paper, an experimental study was carried out on radiation shielding properties and certain physical and mechanical properties of normal and limonite reinforced concrete. For this purpose, with the normal concretes prepared according to standards, amounts of aggregates were reduced at the rates of 20%, 40%, 60%, 80% and 100% by volume respectively, and heavy concrete mixes were prepared that were obtained by adding limonite at the same rates in their place. With limonite reinforcement, compressive and flexural strength of the concrete produced decreased, water absorption amount increased and their radiation permeability significantly decreased.
AtıfWoS54OpenAlex56İncele - MakaleYalnız künye2018Scopus SJRQ4Effect of Water Quality on Monthly Density Variation of the Endangered Southern Medicinal Leech Hirudo verbana Carena, 1820 (Hirudinea: Arhynchobdellida: Hirudinidae)
Saglam, Naim; Özbay, Ozkan; Demir, Timur; Balci, Mustafa; Pala, Aysegul; Kiliç, Ali
The species of the genus Hirudo are threatened but still used worldwide in human treatment. We studied the density changes of southern medicinal leech Hirudo verbana and some water quality parameters monthly during a year in the Akpinar Marsh, Eastern Anatolia, Turkey. Samples of H. verbana were collected using a modified unit square design and unit time collecting method as an indicator for population density. Some water parameters such as water temperature, dissolved oxygen, pH, some cationic elements (lithium, sodium, ammonium, potassium, magnesium, calcium) and anionic elements (fluoride, chloride, sulphate, nitrate, phosphate, bromide) were determined. These parameters were analysed to detect their impact on population density of this medicinal leech. The populations of H. verbena were most dense in May-June; the species was found in smallest numbers in November and hibernating in December-March. A significant correlation (p<0.05) between the number of medicinal leeches in the unit area and monthly water temperature, amount of ammonium and fluoride was determined using the Pearson correlation coefficient. In the Akpinar Marsh, the largest adult medicinal leeches (>5 g) in the fourth size group formed 12.50-27.50% of the population and the smallest (<1.0 g) in the first size group formed 7.50-38.24%.
AtıfWoS3İncele - MakaleAçık Erişim2018Assessment of metal concentrations and physicochemical parameters in the waters of Lake Tecer
Mutlu, Ekrem; Kutlu, Banu; Demir, Tugba; Yanik, Telat
Aim of the study: The objectives of this study are to observe the monthly and annual changes in water samples using physical-chemical methods in order to determine the water quality properties, to reveal pollution problems, to determine the suitability of water quality for aquatic life and to classify the quality of water in accordance with the Surface Water Quality Management Regulation's Inland Surface Water Classes criteria. Area of the study: Lake Tecer is located in the southeastern area of Sivas city and at the end of Brook Tecer, a branch of the Kizilirmak. The lake has a mean depth of 2.4 m and is fed by surface waters and snowmelt. Material and methods: The study period was from March 2011 to February 2012. Samples analysed for several chemical and physical parameters representing water quality were collected monthly over a period of 12 months. Main results: It was observed that the condition of the lake in terms of water quality is good. According to the Classification of the Intra-Continental Water Resources in the WPCR, the lake shows Class I, II and III water quality characteristics. Research highlights: In order to protect the water quality of this water source, to reduce further pollution and to sustain the natural ecological balance consisting of natural fish stocks and other aquatic animals, this lake should be monitored continuously.
AtıfWoS6OpenAlex11TR Dizin5İncele - BildiriAçık Erişim2018Investigation of Earthquake Behaviour of Construction System and Materials in Traditional Turkish Architecture
Yardimli, Seyhan; Dal, Murat; Mihlayanlar, Esma; Cattani, C; Atangana, A; Bulut, H; Hammouch, Z; Baskonus, HM; Mekkaoui, T; Agoujil, S
In this study, it is aimed to present a point of view regarding the behaviour of construction systems implemented in traditional Turkish architecture against earthquakes. In the scope of the study, examples of civil architecture were considered and their structures were evaluated as building elements such as foundation, wall and flooring. Traditional Turkish architecture construction systems can be evaluated in two parts. One of them is the wooden carcass system and the other is the unreinforced masonry system. In the wooden carcass system, the carrier is the load bearing elements used in horizontal and vertical directions. Intermediate parts (strut, diagonal etc.) are placed between these elements to form triangles. The triangles (strut, diagonal) used in the wooden skeleton system comprise highly resistant forms against earthquakes. Moreover, due to the internal structure and physical properties of the wood, which is the skeleton material, the flexibility that it maintains can meet the lateral loads of earthquakes. The second construction system which is the system addressed in this application, is the unreinforced masonry system. In this system, the loadbearing system itself is the walls, which are not resistant to lateral loads. In order to provide this flexibility beams (hatillar) are installed at certain intervals. After the wall is built to a certain height, a different material is laid allowing a plane of movement on the wall. Thus, when the wall is exposed to a lateral load, it escapes from the planes where the beams (hatillar) are present, and is protected against large damages by absorbing the earthquake load. In order to establish that the foundation of the structure can withstand earthquakes by movement, wood is placed at the lower part of the foundation above a layer of sand ensuring lateral movement and flexibility of the building. In traditional buildings the slabs are connected to the building walls with beams (hatillar). Through the agency of the beams (hatillar) formed at the connection points, the slabs can act as a mass so that they can meet the earthquake load. Allowing the structure to move makes it resistant to earthquakes, seismic isolators are used for this purpose by absorbing the earthquake load and moving the foundation of the structure.
AtıfWoS1OpenAlex4İncele - MakaleAçık Erişim2018Scopus SJRQ1Silica gemstones formation in Yamadag volcanites (Arguvan-Malatya) mineralogical, geochemical, gemological properties and economic importance
Akbudak, Ilkay Kaydu; Basibüyük, Zeynel; Gürbüz, Meltem; Önal, Ayten Oztufekci; Isler, Fikret
Yamadag Volcanics which is one of the examples of the Late Miocene volcanism in Eastern Anatolia covers large areas within the boundaries of Arguvan county of Malatya. The gemstones, subject of this research range from a few centimeters to about 30-40 cm in size and are formed in the cavities of the basalts beonging to Yamadag volcanics. These gemstones seem to have formed as veins extending in east-west direction and consist of opal (opal-CT) and chrysocolla. Opal formations have various colours such as white, brown, yellow and greenish, while chrysocolla formations are bluish-greenish in color. both opal and chrysocolla are of massive type and their fresh surfaces display waxy luster. Mineral paragenesis and formation conditions of gemstones and are determined by applying XRD, SEM, FT-IR techniques. ICP-MS technique is used for the determination of the geochemical compositions. The gemological characteristics are identified via cabochon and facet cut techniques by using diamond coating blade, sintered diamond abrasive discs and polishing machine. Opals are usually composed of tridymite minerals, also in some cases quartz and cristobalite minerals accompany the tridymite minerals. The EDX measurements reveal, enrichment of Fe and Al in opals, and of Cu in chrysocolla. The ICP-MS measurements, in chrysocollas reveal, enrichments in LIL elements such as Ba, Sr and in HFS elements such as U. Consequently, gemological studies show that the chrysocolla and opals in study area, which have waxy luster and massive structure, are suitable for utilization as a gemstone due to its color, hardness, durability, homogeneous distribution of color and processability.
AtıfOpenAlex12İncele - MakaleAçık Erişim2018Reproduction Biology of Capoeta trutta (Heckel, 1843) in the Uzuncayir Dam Lake
Gündüz, Fatih; Çoban, M. Zulfu; Yüksel, Fahrettin; Demirol, Ferhat; Alpaslan, Kenan; Alp, Ahmet
In the study, on the purpose of contribute to sustainable fisheries strategies. the reproductive characteristics of Capoeta trutta in Uzuncayir Dam Lake were investigated. The fish samples were caught from Uzuncayir .Dam Lake by using gill nets with different mesh sizes (36-100 mm) between January - December 2013. During research period, a total of 385 C t mita samples that were caught from Uzuncayir Dam Lake yielded 167 female (43.00%) and 218 male (57.00%) with an age composition of population varied from I to XII age groups. GSI values reached a maximum in May and rapidly declined after that month, and it can be concluded that C trutta in Uzuncayir Dam Lake deposites its sperms and eggs between May-July. Egg size varied between 0.30-1.07 mm in dimeter. The relationships between fecundity-total length and fecundity-total weight were determined respectively as r= 29.708*TL-593.36 (N= 35. r= 0.27), F = 9.6148*W+5488.3 (N= 35. r= 0.38). The fecundity of C trutta individuals changed from 1362 to 15428 according to age groups. Sexual maturity length was determined as 20.77 cm and 19.35 cm for female and males. respectively.
AtıfWoS1OpenAlex3İncele - MakaleYalnız künye2018COMPARISON OF FEM SOLUTION WITH ANALYTICAL SOLUTION OF CONTINUOUS AND DISCONTINUOUS CONTACT PROBLEM
Kaya, Yusuf; Polat, Alper; Özsahin, Talat Sukru
The continuous and discontinuous contact problem of a homogeneous layer loaded with three rigid flat blocks and resting on the elastic semi-infinite plane was investigated in this study by using the finite element method (FEM). All surfaces are assumed to be frictionless. The homogenous layer was loaded by means of three rigid flat blocks whose external loads are Q and P (per unit thickness in z direction). Two dimensional finite element analysis of the problem was performed using ANSYS package program. Analyzes were performed for loading conditions which are Q=P, Q=2P, Q=4P, Q=8P and Q=10P, and different values of block widths, distances between blocks and shear modulus. The initial separation loads and initial separation distances (lambda(cr), chi(cr)) between the homogeneous layer and the elastic semi-infinite plane were determined for continuous contact condition. The length of the separation zone was obtained for discontinuous contact condition. In addition to these, normal stress distributions between the layer and the semi-infinite plane were determined for continuous and discontinuous contact conditions. As a result of the study, the analytical results, and the results of the finite element method were shown by comparing as graphs and tables.
AtıfWoS5İncele - MakaleYalnız künye2018Scopus SJRQ3THE EFFECTS OF MANNAN OLIGOSACCHARIDE (MOS) AND VITAMIN B12 ADDITIVES ON THE LIVER AND INTESTINE HISTOLOGY OF THE CARP FRY (CYPRINUS CARPIO L-1758)
Ates, Mehmet; Atar, Hasan Huseyin
In this study, four hundred (400) carp frys (Cyprinus carpio L. 1758) were fed for 90 days with commercial feed containing Mannan oligosaccharide (MOS) and Vitamin B-12. The effects of feeding with MOS and Vitamin B-12 additives in different proportions on the parameters on intestine and liver histology of the carps were studied. As a result of this particular study, no pathological disorder was observed in the liver cells based on histologic reviews. The villi in the intestine showed slight increase both in terms of length and thickness within the group fed with MOS, while the other groups fed without MOS showed no alteration for this particular organ.
- MakaleAçık Erişim2018Scopus SJRQ3Dissolution kinetics of calcined ulexite in ammonium sulfate solutions
Demirkiran, Nizamettin; Tanaydin, Mehmet Kayra; Özdemir, G. Deniz Turhan
Ulexite is one of the boron minerals, which include a respectable amount of hydration water. It can be used as a raw material in the production of boron compounds. Some part of water in the composition of ulexite can be removed from the solid matrix applying dehydration treatment, and a porous structure can be obtained to increase the reaction rate. In the present study, the effect of dehydration temperature on dissolution kinetics of ulexite in ammonium sulfate solutions was researched in a batch reactor utilizing the parameters of solution concentration, solid-to-liquid ratio, stirring speed and reaction temperature. It was determined that the dissolution rate of calcined material increased with increasing solution concentration and reaction temperature and with decreasing solid-to-liquid ratio. The highest dissolution rate was attained with the sample calcined at 150 degrees C. It was found that the dissolution rate fit to the first order pseudo-homogeneous model. The activation energy of the dissolution process was estimated to be 42 kJ.mol(-1).
AtıfWoS2OpenAlex1İncele - MakaleYalnız künye2018Scopus SJRQ3Kinetics behavior of methylene blue onto agricultural waste
Sarici-Özdemir, Cigdem; Kiliç, Fatih
In the present work, investigations on a potential use of agricultural waste for the removal of methylene blue (MB) from wastewater are presented. Adsorption kinetics of MB has been studied using reaction-based and diffusion-based models. Three kinetic models, namely pseudo-first-order, pseudo-second-order, and the Elovich are analyzed at the temperature of 298 K for the reaction-based model. The kinetic studies showed that the data were well described by the pseudo-second-order kinetic model. Intraparticle diffusion, external-film diffusion, and internal-pore diffusion models characterizing MB were obtained. The results suggested that the agricultural waste has a high potential to be used as an effective adsorbent for MB adsorption. Pseudo-first-order, pseudo-second-order, and the Elovich models were employed to describe the desorption mechanism. The experimental results showed that the pseudo-second-order equation is the best model.
AtıfWoS22OpenAlex23İncele - MakaleYalnız künye2018Scopus SJRQ2An occupational risk assessment approach for construction and operation period of wind turbines
Gul, M.; Guneri, A.F.; Baskan, M.
As wind energy is one of the most important renewable energy sources over the globe, need for increasing safety for this type of energy is gaining importance. Although this sector is not suffering an excessive amount of fatal injury accidents, there are many aspects open for improvements in occupational health and safety management. The construction and operation processes of wind turbines include several hazards that must be reduced. This study aims to present a risk assessment for the construction and operation period of wind tribunes using a new fuzzy based method. Fuzzy analytical hierarchy process, a common used multi criteria decision making method, is applied to assign weights to the parameters of Fine-Kinney risk analysis method. Then, fuzzy VIKOR method is used to prioritize hazards. A case study is carried out for an onshore wind turbine in Turkey by using occupational health and safety experts in weighting risk parameters and evaluating compromised rankings of the hazards. Results reveal the most important hazards both for construction and operation period of the wind tribune. On conclusion of the current study, control measures for those risks and possible corrective-preventive actions for improvement are also provided.
AtıfScopus40WoS35OpenAlex35
İncele - MakaleAçık Erişim2018Scopus SJRQ3Seismic assessment of existing RC buildings before and after shear-wall retrofitting
Onat, Onur; Yön, Burak; Calayir, Yusuf
The existing reinforced concrete (RC) buildings are analysed in the paper before and after shear-wall retrofitting. For numerical application, an existing RC building was selected and retrofitted with shear walls. Incremental dynamic analyses and static pushover analysis of these buildings were performed using the distributed plastic hinge approach. The results show that seismic retrofitting with shear walls increases rigidity and capacity of the building, while decreasing lateral displacements and damage.
AtıfScopus4WoS3OpenAlex3İncele - MakaleYayıncıda açık erişim2018Scopus SJRQ2Cancer treatment model with the Caputo-Fabrizio fractional derivative
Ali Dokuyucu, Mustafa; Celik, Ercan; Bulut, Hasan; Mehmet Baskonus, Haci
In this article, a model for cancer treatment is examined. The model is integrated into the Caputo-Fabrizio fractional derivative first, to examine the existence of the solution. Then, the uniqueness of the solution is investigated and we identified under which conditions the model provides a unique solution.
AtıfScopus241OpenAlex244İncele - MakaleYalnız künye2018Scopus SJRQ1Anesthetic potential of geranium (Pelargonium graveolens) oil for two cichlid species, Sciaenochromis fryeri and Labidochromis caeruleus
Can, Erkan; Kizak, Volkan; Seyhaneyildiz Can, Şafak; Özçiçek, Esin
The anesthetic potential of geranium oil (Pelargonium graveolens L.) was evaluated in two freshwater aquarium fish species, the electric blue hap (Sciaenochromis fryeri, 2.00 ± 0.61 g) and blue streak hap (Labidochromis caeruleus, 2.31 ± 0.52 g). Fish were exposed to nine concentrations of anesthetic (25, 50, 75, 100, 125, 150, 200, 250, 300 μl L−1). The induction time generally decreased significantly with increasing concentration of geranium oil for both of the fish species. The recovery time increased with the enhancing geranium oil concentration. Deep anesthesia took between 61.19 ± 7.25 s and 165.43 ± 6.78 s for S. fryeri and between 73.32 ± 8.92 s and 171.12 ± 10.74 s for L. caeruleus. Recovery occurred after 96 ± 6.87 s (L. caeruleus), with the longest being 291.45 ± 8.31 s (S. fryeri). The minimal effective concentration was 75 μl L−1 for deep anesthesia for both two species, and 50 μl L−1 was found as the minimal sedative concentration at the stage of loss of equilibrium. These findings suggested that geranium oil is a new potential anesthetic for two ornamental fish species.
AtıfScopus33WoS29OpenAlex34İncele - MakaleYalnız künye2018Scopus SJRQ1A new Fine-Kinney-based risk assessment framework using FAHP-FVIKOR incorporation
Gul, Muhammet; Guven, Busra; Guneri, Ali Fuat
The most crucial step of a risk assessment process that follows identifying the scope of assessment and hazards is the initial risk assessment, particularly with a risk scoring system. The Fine–Kinney method is a comprehensive method for quantitative evaluations to aid in controlling hazards. In this risk assessment method, the risk value is calculated by considering the parameters of the consequence of an accident (C), the exposure or frequency of occurrence of a hazard event that could lead to an accident (E) and the probability of a hazardous event (P). The classical Fine–Kinney method has a limitation in that it assigns an equal weight to these three parameters. Therefore, we propose a new risk assessment method incorporating a fuzzy analytic hierarchy process (FAHP) with fuzzy VIKOR (FVIKOR). FAHP was used in weighting these risk parameters derived from the Fine–Kinney method. The priority orders of hazards were determined by a FVIKOR method. The proposed method enables group decision-making in assessing hazards and uses relative importance among three risk parameters by pair-wise comparison of Buckley's FAHP. Owing to the difficulty in evaluating C, E and P, linguistic terms are used in the proposed method. In addition, a case study of the evaluation of risks in the arms industry is used to illustrate the proposed method. A comparison with the classical method and fuzzy technique for order preference by similarity of an ideal solution (FTOPSIS) is discussed. The results show that the proposed method is effective in helping stakeholders to determine the risk control policies to validate the effectiveness of their risk controls.
AtıfScopus106WoS84OpenAlex124İncele - MakaleAçık Erişim2018Scopus SJRQ3Design, analysis, and control of in-wheel switched reluctance motor for electric vehicles
Omaç, Z.; Polat, M.; Öksüztepe, E.; Yıldırım, M.; Yakut, O.; Eren, H.; Kaya, M.; Kürüm, H.
Estimation of dimension parameters for an electric machine has great importance before assembling on production line. As a matter of fact, researchers should find optimum solution once they decide to perform analytical design of an electric machine. In this study, we have tried to find dimensional and electrical parameters via derived mathematical equations for in-wheel switched reluctance motor (IW-SRM), and the motor has been manufactured. Moreover, an experimental setup is designed, and the speed and torque control of IW-SRM is carried out. The motor tests including both standstill and running test are performed by using the experimental setup. Initial size parameters are intuitively provided as motor analysis is conducted by software package. Then, numerous trials are examined to get optimum results. In fact, this motor is employed by an electric vehicle whose design is ongoing. Therefore, optimum motor parameters for required base speed and torque have been estimated by solving generated equations for IW-SRM with 18/12 poles via MATLAB. Considering parameters estimated, analysis of IW-SRM has been performed by Ansoft Maxwell 15.0 Software Package based on 3D finite element method (3D-FEM). Consequently, the estimated parameters have been validated by the results of Maxwell 3D FEM. Experimental results of the motor manufactured are obtained via the motor driver designed; also have been validated by Maxwell 3D.
AtıfScopus14WoS15OpenAlex24İncele - MakaleAçık Erişim2018Scopus SJRQ3Performance comparison between ARIMAX, ANN and ARIMAX-ANN hybridization in sales forecasting for furniture industry; [Usporedba performansi modela ARIMAX, ANN i hibridizacije ARIMAX-ANN u predviđanju prodaje za industriju namještaja]
Yucesan, Melih; Gul, Muhammet; Celik, Erkan
Manufacturing firms aim to increase their profits and reduce costs in a competitive and rapidly changing market. One of the most important ways to reach these goals is to forecast sales correctly. Furniture manufacturing, which is considered a prosperous and growing industry in Turkey, has an increasing trend related to the growth in construction and associated industries, increase in urban migration and increase in per capita income. Accuracy of sales forecasting in furniture industry is affected by external factors, such as consumer confidence index, producer price index, month of the year and number of vacation days as well as the time factor itself. This study aims to develop an Autoregressive Integrated Moving Average with external variables (ARIMAX) to forecast the total monthly sales of furniture products of a well-known manufacturer in Turkey. As a follow up study, a performance comparison between ARIMAX, artificial neural networks (ANNs) and ARIMAX-ANN hybridization is performed. In conclusion, results of performance measures demonstrate that hybrid model developed for each amount of product sales give better accuracy values than single methods. Overall, it is proved that using the ARI-MAX and hybridization of this method with ANN are applicable for forecasting monthly sales of furniture products.
AtıfScopus7WoS5OpenAlex20İncele