Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Gul, Muhammet(86)
- Güler, Ömer(69)
- Akkurt, Nevzat(68)
- Baskonus, Haci Mehmet(53)
- Tekin, H.O.(52)
- Bulut, Hasan(50)
- ALMisned, Ghada(49)
- Serdar, Osman(43)
- Yucesan, Melih(43)
- Paksoy, Mehmet Yavuz(42)
- Yildirim, Numan(41)
- Zengin, Gokhan(40)
- Yildirim, Nuran Cikcikoglu(39)
- Ince, Muharrem(37)
- Kocabaş, Mehmet(37)
- Celik, Erkan(35)
- Benzer, Fulya(33)
- Sulaiman, Tukur Abdulkadir(29)
- Aslan, Naim(27)
- Can, Erkan(27)
- Kutlu, Banu(27)
- Kök, Mediha(27)
- Tanyol, Mehtap(27)
- Danabas, Durali(26)
- Kutluyer, Filiz(26)
- Özkul, İskender(26)
- Ates, Mehmet(25)
- Yildirim, Ozal(25)
- Onat, Onur(23)
- Topal, Murat(23)
- Demir, Veysel(22)
- Erten, Fusun(22)
- Guler, Omer(22)
- Say, Yakup(22)
- Yaman, Mehmet(22)
- Alataş, Mevlüt(21)
- Güler, Seval Hale(21)
- Çimen, Okay(21)
- Baykal, Duygu Sen(20)
- Mete, Suleyman(20)
Yayınlar
- MakaleYalnız künye2023Scopus SJRQ2Energy-momentum localization in rainbow gravity
Korunur, Murat; Korunur, Sibel
Theoretical physicists generally prefer to modify the general theory of relativity rather than avoiding the successful approaches that have been offered to us. Hence, the rainbow formalism of gravity, which is one of the most studied quantum gravity candidates in literature, has recently gained importance in the field. In this study, the energy-momentum localization problem is discussed for the Taub universe within the framework of rainbow gravity. To achieve this goal, energy and momentum components are calculated by making use of diverse values of rainbow functions in the Einstein, Bergmann-Thomson, Landau-Lifshitz, and the Papapetrou prescriptions for the geometry under consideration. Except for the Landau-Lifshitz prescription, all prescriptions depend on the rainbow functions and the momentum components vanish. Graphical analysis is performed for all the energies obtained. Also, it is shown in limiting condition f1(x) → 1; f2(x) → 1 that the results are compatible with the ones obtained in the general relativity.
AtıfOpenAlex1
İncele - MakaleYalnız künye2023Scopus SJRQ1Ultrasound assisted adsorptive removal of Cd+2 ions from the water system using Bi2S3 nano/micro flowers
Kurnaz Yetim, N.; Aslan, N.; Özcan, C.; Koç, M.M.
Heavy metal ions threaten public health and marine life; thus, removal of heavy metals is essential for the environment. Bi2S3 nanostructures are active materials which used in various applications. In this work, we produced Bi2S3 nanoflowers using hydrothermal synthesis and assessed their Cd2+ ions removal capability. Structural properties of the Bi2S3 nanoflowers were assessed by various like scanning electron microscopy, X-ray diffraction. Chemical characteristics of the materials were confirmed using energy dispersive X-ray spectra. Different parameters affecting the Cd2+ ion recovery was worked some of which are adsorbent amount, Cd2+ ion concentration, pH, adsorbent time, eluent type and amount, etc. For cadmium, the optimum pH was determined 8.0 for 1 M HNO3 eluent. Optimum adsorbent amount was determined as 150 mg while optimum recovery duration was found as 30 min. Bi2S3 nanoparticles managed to achieve 99.3% Cd2+ recovery rate in 5 mL eluent volume, for optimum condition. The adsorption capacity of the Bi2S3 nanoflowers was found to be promising and therefore, it was illustrated that Bi2S3 nanoflowers are good candidates as sorbent for water remediation applications.
AtıfScopus3WoS3OpenAlex3İncele - MakaleAçık Erişim2023Scopus SJRQ2Application of the deep transfer learning framework for hydatid cyst classification using CT images
Gul, Yeliz; Muezzinoglu, Taha; Kilicarslan, Gulhan; Dogan, Sengul; Tuncer, Turker
Hydatid cyst, which causes important public health problems, is a disease frequently reported by radiologists. Classification of hydatid cyst types is very important to give the most suitable cure to patients. In order to decrease the misclassification rates of these cysts, machine learning is a good solution to create intelligent medical assistants. The primary objective of this work is to develop a new image classification framework to classify hydatid cyst types. Firstly, we collected a computed tomography (CT) image dataset. This CT image dataset consists of 2416 CT images with five classes (hydatid cyst types). We proposed a new deep feature engineering dataset framework for this dataset. This framework consists of (i) deep feature extraction by deploying transfer learning, (ii) iterative feature selection using INCA (iterative neighborhood component analysis), and (iii) classification. In the first phase—the feature extraction phase—we extracted deep features by deploying ten pretrained convolutional neural networks (CNNs). The used CNNs are commonly used CNNs, and the deep features have been extracted using the last pooling and fully connected layers of these networks. INCA has been applied to the generated deep features by each feature vector. k-nearest neighbors (kNN) classifier has been utilized to generate predicted values of these 10 CNNs using the selected features by INCA. Our proposed INCA-based deep feature extractor attained over 92% classification accuracy for each pretrained model. Our proposed framework reached over 92% classification accuracies, clearly demonstrating that our proposed framework is good image classification.
AtıfScopus10WoS5OpenAlex8İncele - MakaleAçık Erişim2023Scopus SJRQ1The Effects of Changing the Effective Crest Length of Labyrinth Side Weir on Discharge Capacity
Dogan, Yusuf; Kaya, Nihat
Labyrinth side weirs have significant advantages according to conventional side weirs in terms of discharge capacity. Labyrinth side weirs are especially advantageous in places where more discharge is required from small weir openings lengths. The most significant feature of labyrinth side weirs is their effective crest length, which enables them to discharge more flow. In this study, the situation where the discharge capacity is decreased due to the narrowing of the crest length of the labyrinth side weir for any reason was experimentally investigated in detail. It was also considered that the potential narrowing could be in the upstream weir crest length. The overflow from the remaining length of the crest was enabled by the 1/3, 2/3, and 3/3 closure of the upstream crest length of the labyrinth side weir. Therefore, it was attempted to determine the decrease in discharge capacity due to the narrowing in the effective crest length. The values of the discharge coefficient were obtained by using the De Marchi approach. The study was conducted for subcritical flow regimes and steady-state flow conditions. A total of 980 experimental runs were conducted in this study. As the length of upstream effective crest length of the triangular labyrinth side weir at the straight channel decreases, the discharge coefficient also decreases. By narrowing the length of effective upstream crest length in 1/3, 2/3, and 3/3 ratios, the total discharge capacity decreased by approximately 10%, 23%, and 48%, respectively.
AtıfScopus7WoS6OpenAlex6İncele - MakaleYalnız künye2023Scopus SJRQ2Deep learning based an effective hybrid model for water quality assessment
Utku, Anıl; Utku, Esen Damla; Kutlu, Banu
Water, which is very important for life and civilizations on Earth, has been a source of life for all living things. However, freshwater resources gradually decrease due to climate change, pollution, and population growth. Water pollution is the quality changes that occur due to various activities of people, change the chemical, biological, and physical properties of water, restrict or prevent its use, and disrupt ecological balances. The water quality criteria determined to keep this pollution under control ensure the safe use of water. Water quality observations have gained more importance today due to intense environmental concerns and water pollution. This situation revealed the necessity of water quality assessment for water source use. In this study, the CNN-LSTM-based hybrid model was proposed to assess water quality. The proposed model was compared with AdaBoost, DT, GNB, kNN, LGBM, RF, and LSTM according to accuracy, precision, recall, F-score, and AUC. The proposed model has 98.81% accuracy, 99.03% precision, 99.65% recall, 99.33% F-score, and 93% AUC. Practitioner Points: CNN-LSTM hybrid model was developed to water quality assessment. The proposed model is compared with established techniques like AdaBoost, DT, GNB, kNN, LGBM, RF, and LSTM. The developed model has 98.81% classification accuracy. Experimental results show that the developed model will ensure the use of safe water according to water quality criteria.
AtıfScopus7WoS4OpenAlex8
İncele - MakaleYalnız künye2023Scopus SJRQ2The Effect of Using Ferro-Alloy on the Properties of AlCoFeNiMoTi High-Entropy Alloy Produced by Arc-Melting Method: Design of Low Cost
Güler, Seval H.
The cost of high-entropy alloys (HEAs) is one of the most major obstacles to their widespread use. The cost of these alloys with significant amounts of five metals might reach very high levels depending on the type and quantity of metal utilised. Therefore, this study examined the effect of the use of ferro-alloys as part of the charge mixture on the properties of AlCoFeNiMoTi alloy. Ferro-alloys are much less expensive than the pure form of the same metal. To that end, two groups of samples were produced. The AlCoFeNiMoTi alloy was produced using high-purity metals as the metallic charge in the first group of samples. Instead of utilising the pure forms of some expensive metals that make up such alloy, as the metallic charge, lower-cost ferro-alloy forms were employed in the second group of samples. Following the preparation of the appropriate compositions, alloys were produced using the arc-melting method, and the produced alloys were subject to homogenization heat treatment. The obtained samples were characterised by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Then, mechanical and corrosion tests were run. The corrosion resistance of the HEAs was compared with an electrochemical polarisation technique in a 3.5% NaCl electrolyte. It was observed that many intermetallics precipitated through the heat treatment of the samples, and the precipitates negatively affected the mechanical properties of the alloy. Also, in the samples in which ferro-alloy was used instead of pure metal, the mechanical properties were substantially degraded. This is believed to be associated with the presence of inclusions and other residues in ferro-alloys. Graphical Abstract: [Figure not available: see fulltext.]
AtıfScopus6WoS7OpenAlex7İncele - MakaleYalnız künye2023Scopus SJRQ4Neurotoxic Effect of New Generation Insecticide with Flubendiamide Active Ingredient in Gammarus pulex (Linnaeus, 1758) (Amphipoda: Gammaridae) at Different Temperatures
Söylemez, Hilal; Serdar, Osman
This study aimed to determine the relationship between temperature and neurotoxicity of a new generation insecticide, the active ingredient of which is flubendiamide, on non-target aquatic organisms (Gammarus pulex (L., 1758)). Firstly, LC50 values of flubendiamide on G. pulex were determined at 16, 18 and 20 °C as 256.83 ± 19.59 µgL-1, 169.38 ± 34.17 µgL-1 and 155.84 ± 17.22 µgL-1, respectively. We found that the acute toxicity sensitivity of the test organism to the pesticide containing flubendiamide increased with increasing temperature. Secondly, G. pulex was exposed to non-lethal concentrations of flubendiamide pesticide for 96 hours at the above temperatures. Finally, the changes in acetylcholinesterase (AChE) enzyme activity were determined for each temperature using ELISA kits. The exposure time between the 24th and 96th h at the same temperature was found to be statistically insignificant (p>0.05). It was determined that the inhibition value of AChE enzyme activity on the test organism of the pesticide with active ingredient flubendiamide increased depending on the temperature increase. Considering the changes in AChE enzyme activities in G. pulex at different temperatures against flubendiamide insecticide, it was concluded that it can be used as a useful biomarker.
AtıfScopus1İncele - MakaleAçık Erişim2022Scopus SJRQ3Iron Age and Later Periods in an Isolated Region: The Bingol-Solhan Fortress
Danismaz, Harun; Köroglu, Kemalettin
Solhan Kalesi [Solhan Fortress] lies at the western tip of the Solhan Plain from which it derives its name. The fortress site was discovered in 2019 during surveys. Drywall fortifications reinforced with bastions and foundations from various buildings inside the fortification walls have been documented at the site. Ceramics and slag found at Solhan Fortress indicate that the site may have been a tribal center in the Iron Age. However, the architectural features of the fortress, especially the fortifications with bastions, are notably different from other Iron Age sites in the region. Surface finds do not include painted or glazed ceramics from the Medieval Period. Current findings indicate Solhan Fortress to have been inhabited for a long period from the Middle Iron Age to the Medieval Period.
AtıfWoS1İncele - MakaleYalnız künye2022On the Archimedean copula constructed from the Bezier polynomial type diagonal section
Susam, Selim Orhun
In this study, we construct a convex Bezier type diagonal section which uniquely characterizes the Archimedean copula. The proposed diagonal section is flexible according to its polynomial degree; hence, we can add the additional parameters to the diagonal section by increasing the polynomial degree. We also present a graphical tool based on the diagonal section in order to visualize the different types of Archimdean copulas in the copula test space. As an illustration, the real data examples are given.
- EditoryalYalnız künye2022THE ROUTLEDGE HANDBOOK OF THE CRIMEAN WAR INTRODUCTION
Badem, Candan; Badem, C
AtıfWoS2İncele - MakaleYalnız künye2022APPLICATION OF RAINWATER HARVESTING TO MUNZUR UNIVERSITY CAMPUS AND EXAMINATION OF CONTRIBUTIONS
Korkmaz, Meral
The world is facing drought, and over time, water problems are becoming more serious. Agricultural land and green areas are gradually declining due to water scarcity. While the amount of available water is gradually decreasing, people's unnecessary use of water and water consumption are increasing. This, in turn, requires the accurate use of existing water resources and the realization of intelligent building systems as soon as possible. Despite this fact, none of the university's public buildings currently use systems such as the rainwater harvesting technique. The main aims of this research are to find effective results in terms of savings and to contribute to avoiding water shortages in the future. It is important today to immediately begin making future housing with these systems and to integrate these intelligent systems into public buildings, especially incorporating the latest technologies. In this study, the advantages of zero-energy built roofs and rainwater harvesting systems on the Munzur University campus are evaluated.
AtıfWoS1İncele - MakaleAçık Erişim2022Demirkopru Baraj Golu'nde ?lk Viviparus contectus (Millet, 1813) Kayd? ve Baz? Biyometrik Parametrelerinin De?erlendirilmesi
Kocabas, Filiz K. U. T. L. U. Y. E. R.; Kocabas, Mehmet
The aim of this study is to investigate some biometric characteristics of Viviparus contectus (Millet, 1813) in Demirkopru Dam Lake, Manisa province. Measurements of 180 individuals collected in the study area were performed using calipers and precision balances, and weight (g), width (mm), height (mm), aperture length and width (mm), spiral height (mm), body whorl height data were obtained. It was determined as 20.23 +/- 5.16 mm for shell height, 16.11 +/- 3.33 mm for shell width, 11.93 +/- 2.39 mm for aperture height, 9.71 +/- 2.11 mm for aperture width, 15.71 +/- 3.87 mm for body spiral height, 4.49 +/- 1.73 mm for spiral height and 4.50 +/- 0.93 g for weight. According to principal components analysis, there is a strong relationship between Shell height (KH), Shell width (KW), Aperture height (AH) and Body helezone height (VHS).V. contectus species has been reported for the first time from the region with this study.
AtıfWoS3OpenAlex2TR Dizin1
İncele - MakaleAçık Erişim2022OTTOMAN MILLING FROM CLASSICAL TO MODERN TIMES
Baskutlu, Salih
This article explores flour milling in the Ottoman State from traditional grinding techniques to modern grinding technologies. Although it investigates the historical progress of flour milling in general, the study aims to draw attention to the technological transformation in the milling industry. This scope focuses on the milling types used in the Ottoman world during the premodern periods. Secondly, it uncovers its milling activities and tax policies. Then, the article examines the emergence, development, operating systems, and legal structure of steam mills concerning industrialization efforts. To this end, it studies the competition between traditional mills and steam mills, its causes, and its effects on society. The study presents drawings of the mill models based on the documents found in Ottoman State Archives and to other sources. Grinding the grains with vital importance and serving them to public consumption was one of the primary concerns of the Ottoman State. For this reason, they operated water, wind, and muscle-powered mills for a long time. The emergence of industrialization brought about steam mills with high production capacity. The Ottomans, accordingly, followed the developments carefully to provide the citizens with healthier and hygienic flour with new production models.
AtıfOpenAlex6TR Dizin5İncele - MakaleYalnız künye2022ESSENTIAL OIL COMPOSITION OF ENDEMIC Hypericum ekerii FROM TURKEY AND CHEMOTAXONOMIC COMPARISONS
Yuce-Babacan, Ebru; Demirpolat, Azize
In our study, chemotaxonomic comparisons and essential oil composition of Hypericum ekeriNtice&Aytac (Hypericaceae) endemic to Turkey was studied for the first time. The composition of the essential oils of Hypericum ekerii was investigated and 45compounds were determined in total. GC and GC-MS analysis result showed a-pinene 18.73%, limonene 7.28%, caryophyllene oxide 6.71% and b-caryophyllene 6.47% as the majorcomponents. Based on the major chemical components, clusterinvestigated was applied for all the Hypericum species on Drosanthesection studied. With H. ekerii and all Drosanthesection species were grouped based on the presence of a specific compound and a dendrogram was created, and this section grouped the species into clusters. The chemical distribution of essential oil compounds in the genus pattern were discussed in means of natural products, major components and chemotaxonomy.
- MakaleYalnız künye2022Scopus SJRQ1Analysis of discontinuous contact problem in two functionally graded layers resting on a rigid plane by using finite element method
Polat, Alper; Kaya, Yusuf
In this study, the problem of discontinuous contact in two functionally graded (FG) layers resting on a rigid plane and loaded by two rigid blocks is solved by the finite element method (FEM). Separate analyzes are made for the cases where the top surfaces of the problem layers are metal, the bottom surfaces are ceramic and the top surfaces are ceramic and the bottom surfaces are metal. For the problem, it is accepted that all surfaces are frictionless. A two-dimensional FEM analysis of the problem is made by using a special macro added to the ANSYS package program The solution of this study, which has no analytical solution in the literature, is given with FEM. Analyzes are made by loading different Q and P loads on the blocks. The normal stress (sigma y) distributions at the interfaces of FG layers and between the substrate and the rigid plane interface are obtained. In addition, the starting and ending points of the separations between these surfaces are determined. The normal stresses (sigma x, sigma y) and shear stresses (tau xy) at the point of separation are obtained along the depth. The results obtained are shown in graphics and tables. With this method, effective results are obtained in a very short time. In addition, analytically complex and long problems can be solved with this method.
AtıfWoS23İncele - MakaleAçık Erişim2022TAIL DEPENDENCE ESTIMATION BASED ON SMOOTH ESTIMATION OF DIAGONAL SECTION
Susam, Selim Orhun
This paper is mainly developed around the diagonal section which is strongly related to tail dependence coefficients as defined in Nelsen [19]. Hence, we propose a flexible method for estimating tail dependence coefficients based on the new smooth estimation of the diagonal section based on the Bernstein polynomial approximation. To assess the performance of the new estimators we conduct the Monte-Carlo simulation study. As a result of the simulation study, both estimators perform satisfactory performance. Also, the estimation methods are illustrated by real data examples.
AtıfWoS1OpenAlex1İncele - MakaleYalnız künye2022Scopus SJRQ2Non-similar solutions and sensitivity analysis of nano-magnetic Eyring-Powell fluid flow over a circular cylinder with nonlinear convection
Basha, H. Thameem; Reddy, S. R. R.; Prasad, V. Ramachandra; Son, Kwon Joong; Ahammad, N. Ameer; Akkurt, Nevzat
AtıfOpenAlex15İncele - MakaleAçık Erişim2022Scopus SJRQ2Geochemical and isotopic (Sr-Nd-Pb) signature of crustal contamination in Na-alkali basaltic magmas of South-East Turkey
Agostini, Samuele; Di Giuseppe, Paolo; Manetti, Piero; Savasçin, Mehmet Yilmaz; Conticelli, Sandro
AtıfOpenAlex18İncele - MakaleAçık Erişim2022Anatomical, Micromorphological, Karyological and Biochemical study of Scutellaria orientalis subsp. virens and Scutellaria salviifolia
Acar, Mikail; Tasar, Neslihan; Akbulut, Guelcin Beker
In this study, the anatomical and micromorphological structure, karyological characteristics and biochemical content of Scutellaria orientalis subsp. virens and endemic Scutellaria salviifolia, whose distributions areas overlap, were compared. Some anatomical and micromorphological differences were observed on the taxa; scleranchymatic pericycle layer on the stem, stomata density, distribution of trichomes, as well as the main vascular bundle and general shape of the petiole. The chromosome numbers of both taxa were determined as 2n = 22. However, there was a difference between chromosome length range and total chromosome length. The chromosome numbers and chromosome morphologies of these species have been defined for the first time in this paper. Differences in biochemical content were observed between species. Chlorophyll a (Chl a), total chlorophyll (Total Chl), total carbohydrate and malondialdehyde (MDA) contents were determined higher in leaf and stem samples of S. orientalis subsp. virens than S. salviifolia. There was no significant difference between the two taxa in terms of chlorophyll b (Chl b) content. Carotenoid (Car) content was detected higher in leaves samples of S. orientalis subsp. virens, but no significant difference was found between stems samples. Also, the effect of taxa on biochemical contents in relation to the habitat they live in is given in this study.
AtıfWoS2OpenAlex2İncele - MakaleYalnız künye2022Scopus SJRQ4Some results on N (k)-contact metric manifolds
Altin, Mustafa; Yoldas, Halil Ibrahim; Ünal, Inan
In this study, some geometric properties of N(k)-contact metric manifolds, which are important class of contact manifolds, have been investigated by using a special connection (CY-connection). First, we give some fundamental results on N(k)-contact metric manifolds admitting CY-connection. Then, we obtain curvature properties of such manifolds. We prove that an N(k)-contact metric manifold admitting R* (xi, X).R* = 0 condition is an N (-1/4) metric manifold, where R* is the Riemannian curvature tensor of CY-connection. Also, we examine an N(k)-contact metric manifold admitting CY-connection under W* (xi, X).S* = 0 condition for generalized quasi-conformal curvature tensor W* of CY-connection. Finally, we consider a 3-dimensional N(k)-contact metric manifold admitting CY-connection.