Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Uzun, Sevda(62)
- Merdan, Mehmet(58)
- Duran, Celal(50)
- Ozdes, Duygu(47)
- Kaygusuz, Abdullah(43)
- Ashyralyyev, Charyyar(38)
- Karsli, Orhan(33)
- Öztürk, Serkan(32)
- Araz, Onur(31)
- Demir, Selim(29)
- Kulakaç, Nurşen(29)
- Dokuz, Abdurrahman(28)
- Arslan, Mehmet(27)
- Baltacı, Cemalettin(27)
- Maden, Nafiz(27)
- Sipahi, Ferkan(27)
- Topal, Fevzi(27)
- Turan, Ibrahim(27)
- Kandemir, Raif(25)
- Kurt, Kemal(24)
- Ozturk, Samet(24)
- Peker, Iskender(24)
- Vural, Alaaddin(24)
- Reis, Hatice Catal(23)
- Yücel, Cem(23)
- Aydin, Faruk(22)
- Baltaci, Cemalettin(22)
- Gücer, Mehmet Ali(22)
- Günen, Mehmet Akif(22)
- Kankal, Murat(22)
- Topal, Meryem(22)
- Karimullah, Suud Sarim(21)
- Uysal, Ibrahim(20)
- Kurnaz, Muammer(19)
- Tuncer, Metin(19)
- Yolcu, Halil(19)
- Çelik, Necati(19)
- Ürkek, Bayram(19)
- Şan, Murat(19)
- Aliyazicioglu, Yuksel(18)
Yayınlar
- BildiriYalnız künye2021Numerical solution of the nonlocal reverse parabolic problem with second kind boundary and integral conditions
Ashyralyyev, Charyyar; Gönenç, Ahmet; Ashyralyev, A.; Ashralyyev, C.; Erdogan, A.S.; Lukashov, A.; Sadybekov, M.
In this work, we consider approximation of nonlocal reverse parabolic problem with second kind boundary and integral conditions. Stability and coercive stability estimates for solution of difference scheme are obtained. Some illustrations of numerical results in examples of one and two dimensional reverse parabolic equations are presented.
- MakaleYalnız künye2021Scopus SJRQ2U–Pb zircon ages and petrogenesis of the Late Cretaceous I-type granitoids in arc setting, Eastern Pontides, NE Turkey
Kaygusuz, Abdullah; Arslan, Mehmet; Temizel, İrfan; CemYücel; Aydınçakır, Emre
The Eastern Pontides Orogenic Belt (EPOB) as a well-preserved ancient magmatic arc situated in the eastern part of the Sakarya Zone and has key importance to allow for proper reconstruction of the geodynamic evolution of the region. The region accepted as important part of Alpine–Himalayan Belt comprises of many granitoids of the Late Cretaceous age. This paper presents new mineral chemistry, bulk-rock petrochemistry, U-Pb geochronology and radiogenic and stable isotope geochemistry data from the Arpaköy and Oyman granitoids in the north part of the EPOB to interpretation of the igneous activity and geodynamic evolution of the region in Late Cretaceous era. Emplacement ages of 86.82 ± 0.58 Ma for the Oyman granitoid and 82.0 ± 2.3 Ma for the Arpaköy granitoid according to laser ablation ICP-MS U–Pb zircon dating. The Arpaköy granitoid are gabbro diorite, diorite and granite, whereas the Oyman granitoid are tonalite and granite in composition. They show metaluminous-peraluminous transitional (ASI = 0.79–1.20) low to medium-K calc-alkaline features. The rock samples from granitoids are characterized by enrichment in large ion lithophile elements (LILE) and high field strength elements (HFSE) depletion with concave-upward shapes (LaN/LuN = 1.88 to 6.04). The crystallization temperatures are 648 °C–913 °C and the pressure values are 0.2–3.0 kbar, which indicates emplacement depth of the studied granitoids varying from ~1 to 9 km correspond to shallow crustal depths. They show considerable variations in εNd(i) (−4.02 to 1.50) and 87Sr/86Sr(i) (0.70478–0.70689). The 206Pb/204Pb ratios are between 17.97 and 18.65, and δ18O are varying from +5.4 to +9.3‰. The parental magma of the Arpaköy and Oyman granitoids originated from a melt of the enriched lithospheric mantle and the fractional crystallization and lesser assimilation processes has important role on the evolution of magmas in the shallow crustal levels.
AtıfScopus29WoS29OpenAlex31
İncele - Kitap BölümüYalnız künye2021Scopus SJRQ4Safer-Driving: Application of Deep Transfer Learning to Build Intelligent Transportation Systems
Ünlü, Ramazan
Deep learning methods are widely used in the field of transportation as well as in many areas. These days, deep learning methods produce very successful results thanks to big data, where data collection and storage are much easier than in past years. However, it can be quite difficult to collect data or find the right data in some cases. On the other hand, even if the desired data is collected enough, training deep neural networks to learn from these data may not be comfortable in terms of hardware needed for ordinary users. In these cases, transfer learning can be an exit point, which is very popular in deep understanding, especially when the amount of data is limited. In this study, we have aimed to give comprehensive guidance on using a transfer learning strategy to create a detection model to establish a safer transportation system. More specifically, we have developed a classification model to alleviate accidents due to deer on the road. We have implemented VGG-16 convolutional neural network architecture as a part of the structured transfer learning framework. Computational results show that high accuracy performance can be achieved by implementing VGG-16 with the respectively small size of a dataset.
AtıfScopus1OpenAlex2İncele - MakaleAçık Erişim2021Scopus SJRQ2Constrained adaptive backstepping control of a semi-active suspension considering suspension travel limits
Yıldız, Ali Suat; Sivrioğlu, Selim
In this article, a new constrained adaptive backstepping control design is presented for vibration suppression of the quarter car suspension system equipped with a magnetorheological (MR) damper. In the controller design, parametric uncertainties related to suspension parameter and the semi-active actuator are considered. Also, the proposed controller is investigated, along with the designed road profiles based on the International Standard Organization (ISO) 8608 classification and tested under different speed conditions. The effectiveness of the proposed controller has been validated through comparisons with uncontrolled, passive, and separately designed adaptive control cases. According to the simulation and experimental results, the proposed control approach improves ride comfort and ride safety without violating suspension rattle space constraint despite the uncertainties in suspension parameters.
AtıfScopus20WoS19OpenAlex18İncele - MakaleYalnız künye2021Scopus SJRQ2Inhibition Profiles of Some Symmetric Sulfamides Derived from Phenethylamines on Human Carbonic Anhydrase I, and II Isoenzymes
Topal, Fevzi; Aksu, Kadir; Gulcin, Ilhami; Tümer, Ferhan; Goksu, Süleyman
In this work, the inhibitory effect of some symmetric sulfamides derived from phenethylamines were determined against human carbonic anhydrase (hCA) I, and II isoenzymes, and compared with standard compound acetazolamide. IC50 values were obtained from the Enzyme activity (%)-[Symmetric sulfamides] graphs. Also, Ki values were calculated from the Lineweaver-Burk graphs. Some symmetric sulfamides compounds (11–18) demonstrated excellent inhibition effects against hCA I, and II isoenzymes. These compounds demonstrated effective inhibitory profiles with IC50 values in ranging from 21.66–28.88 nM against hCA I, 14.44–30.13 nM against hCA II. Among these compounds, the best Ki value for hCA I (Ki: 8.34±1.60 nM) and hCA II (Ki: 16.40±1.00 nM) is compound number 11. Besides, the IC50 value of acetazolamide used as a standard was determined as hCA I, hCA II 57.75 nM, 49.50 nM, respectively. Moreover, in silico ADME-Tox study showed that all synthesized compounds (11–18) had good oral bioavailability in light of Jorgensen's rule of three, and of Lipinski's rule of five.
AtıfScopus13WoS12OpenAlex14
İncele - MakaleAçık Erişim2021Scopus SJRQ3Determination of Antimicrobial and Antioxidant Activities and Chemical Components of Volatile Oils of Atropa belladonna L. Growing in Turkey
Öz, Mehmet; Fidan, Muhammed Said; Baltaci, Cemalettin; Ücüncü, Osman; Karatas, Seyda Merve
In this study; the essential oils were obtained from the flowers and leaves of Atropa belladonna L. plants through the hydrodistillation method in a Clevenger type device. The chemical composition of volatile oils was determined by analyzing with the GC-MS/MS instrument. The antioxidant activity of the obtained volatile oils was determined according to total antioxidant content (TAC), free radical scavenging (ABTS) capacity, free radical scavenging (DPPH) amounts, total flavonoid content (TFC), total phenolic content (TPC), and ferric reducing antioxidant power (FRAP) capacity methods. Antimicrobial activities of essential oils were determined through the agar-disc diffusion method. As for the results; volatile oil yields of the A. belladonna were determined as 0.37 % in leaves and 1.57 % in flowers. The highest percentage of chemical compounds in essential oils of the A. belladonna plant were determined as (43.75 %) aldehydes in leaves and as (39.96 %) fatty acids in flowers. In addition, the main constituents found in volatile oils were eicosane (35.92 %) in the leaves and hexadecenoic acid (18.84 %) in the flowers of the A. belladonna. The highest amounts of antioxidant for the test specimens were found as 1.37-1.48 mg QE/100 mL in TFC, as 13.25-21.91 mg AA/100 mL in ABTS, as 51.49-62.87 mg GA/100 mL in TPC, and as 4.71-7.97 mg FeSO4/100 mL in FRAP capacity. As the results of the antimicrobial activities, it was determined that only the leaves of A. belladonna show antimicrobial activity against the mold-yeast and gram-positive and gram-negative bacteria microorganisms among the 17 bacteria and 6 yeast-mold types used in the study.
AtıfScopus12WoS8OpenAlex11İncele - MakaleYalnız künye2021Scopus SJRQ1Effect of far infrared heating process on surface decontamination and quality attributes of whole yellow and white onions
Coskun, Eda; Ozturk, Samet; Akpinar, Merve; Halkman, A. Kadir; Erdogdu, Ferruh
This study aimed to develop an effective decontamination process for whole yellow and white onions with maintained quality attributes. For this purpose, a far infrared radiation (FIR) process was evaluated to determine its effects on microbial safety and quality of the onions. Prior to the FIR process, samples were inoculated with Salmonella culture to about 7–8 log10 CFU/cm2 and stored for 1–48 h at room temperature. Inoculated samples were then processed up to 120 s at 400 °C infrared source temperature. Temperature chance of the onions was recorded by using T-type thermocouples, and surface temperature distribution was obtained with an infrared thermal camera. Quality attributes (color changes, mass losses and textural changes) were also evaluated following the FIR process. The results indicated that 3.3 and 2.4 log10 CFU/cm2 reductions in the Salmonella counts were obtained for the whole yellow and white onions, stored for 1 h at room temperature after 120 s FIR processing. The background microbial population on the outer skin of the onions was under the detection limit (<1 log10 CFU/g). It was observed that the effectiveness of FIR treatment on Salmonella decontamination decreased as the storage time increased from 1 to 48 h at room temperature. FIR process did not significantly affect the quality attributes of the onions, and the results confirmed the potential use of FIR process for surface decontamination of the onions. Further studies were suggested to design an effective FIR system for industrial scale applications.
AtıfScopus17WoS15OpenAlex14İncele - Kitap BölümüYalnız künye2021Public sector accounting in Turkey: Past-present-future
Yanik, Serap Sebahat; Selimoglu, Seval Kardes; Yesilcelebi, Gul; Grima, S; Boztepe, E
Government accounting shows the assets and resources of the government, the changes that occur in them, to provide the necessary information to evaluate the effectiveness of the government in revenue and expense management, and to produce the information required by economic management. In this context, the past, present, and future of the Turkish government accounting system discussed in the theoretical framework in the study.
- MakaleAçık Erişim2021Scopus SJRQ3The effect of pozzolans and mineral wastes on alkali-silica reaction in recycled aggregated mortar
Külekçi, Gökhan
In this study, it was aimed to examine recycled aggregates (RA), which are considered as aggregates, in terms of alkali-silica reaction (ASR) before being used in concrete, to determine the risk status and to reduce the ASR value. In order to reduce and stop the ASR, the cement was replaced with clay brick and fly-ash by 10–40 %. Marble waste and Pb-Zn mine waste were used instead of RA in order to reduce aggregate reactivity. At the end of 28 days, compared to the control sample, it was observed that mortar bar samples containing tailings instead of fine RA has 18 % less expansion and marble waste (MW) added samples again instead of fine RA has 34 % less expansion. Furthermore, 40 % fly ash (FA) added samples decreased the level of ASR for 96 %, and in 10 % clay brick mixed samples ASR formation is decreased to 85 %. As a result, recycled aggregates were determined to be reactive for ASR. It has been determined that marble and lead-zinc mine facility wastes added as replace with to RA reduce the expansion effect by ASR in the cement paste. With this study, it has contributed to the safe use of the increasing use of RA in the world.
AtıfScopus11WoS11OpenAlex8İncele - Kitap BölümüYalnız künye2021The measurement of employee welfare and its effects on the output level
Kocağ, Esra Karapinar
Welfare, in general, refers to both economic and social prosperity of individuals. From an economic point of view, individuals are very important actors of the labour market in the production process. This chapter focuses on employees and attempts to offer a valuable insight into the concept of welfare, its measurement, and its potential impact on the national product. Measuring welfare is not straightforward due to its multidimensional concept. The purpose of this chapter is to provide a way of measurement of employee welfare through an index that combines selected welfare components of employees. In the process of building that index, principal component analysis (PCA) was applied. Preserving variability and reducing dimensionality, this method is a very functional tool to represent multidimensional variables such as welfare in this case. Eurostat data for the period of 2008-2018 were utilized to explain the impact of employee welfare on the GDP per capita for 32 European countries. Findings revealed that employee welfare is a significant indicator of the national product.
AtıfScopus1OpenAlex1İncele - MakaleAçık Erişim2021Scopus SJRQ4Wear, Corrosion and Tribocorrosion Behavior of Polyurethane and Polyvinylpyrrolidone Blends as Coating for Corrosion Protection of AISI 316L Stainless Steel
Taşdemir, Muharrem; Şenaslan, Fatih; Çelik, Ayhan
Polyurethanes (PUs) are used across a widely from biomaterials to industrial applications due to their versatile properties. Polyurethane is blended with other polymers to improve their physical and thermal properties. In this study, different concentrations of polyurethane and polyvinylpyrrolidone (PVP) blends were applied to AISI 316L stainless steel using the dip coating method as protection against wear and corrosion. The effects of different concentrations of blends on the mechanical, corrosion and tribocorrosion properties of the AISI 316L stainless steel were investigated. The phase structure of polymer coatings were investigated by X-ray diffraction (XRD), and their surfaces were examined by scanning electron microscopy (SEM). Corrosion and tribocorrosion tests of the polymer coated samples were carried out in 3.5% NaCl solutions. The surface roughness and nanohardness of the polymeric coated samples were also measured. It was found that surface roughness and friction coefficient increased with raised concentration of PVP, while wear and corrosion resistance decreased with the increased of PVP concentration in the coating. As the penetration depth of the PU coated sample increased, the nanohardness and elasticity modulus decreased. Coatings containing PVP up to 25% protected the substrate surface under tribocorrosion conditions in NaCl solutions.
AtıfScopus6WoS5OpenAlex6İncele - Kitap BölümüYalnız künye2021Cultural Heritage Tourism
Ödemış, Murat; Düzgün, Ertuğrul
- MakaleYalnız künye2021Scopus SJRQ3The First Measurement for Mass Attenuation Coefficients, Effective Atomic Numbers, and Electron Densities of Y123 and Y358 High-Temperature Superconductors (HTS) for the Energies from 46.6 to 1332 keV
Düzgün, İbrahim
Y123 and Y358 high-temperature superconductor phases have experimental mass attenuation coefficients (MAC) determined at 46.5, 81, 122, 302, 356, 383, 662, 1173, and 1332 keV photon energies. The experimental values have been compared with theoretical values acquired employing the XCOM software and database. It has been observed that the theoretical and the empirical results were in perfect agreement. Also, it has been seen that the comparison of the MACs for all specimens examined with the corresponding photon energies complies with the exponential absorption law. The effective atomic numbers (Zeff) and electron densities (Nel) of Y123 and Y358 superconducting phases in different energy ranges have determined experimentally and theoretically. The Y358 superconductor specimen is a relatively better absorber than the Y123 between 40 and 100 keV.
AtıfScopus3WoS4OpenAlex2İncele - Derleme MakaleAçık Erişim2021COVID-19 vaccine and immune response
Hintistan, Sevilay; Demirağ, Hatice
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2; βCoV), the causative agent of coronavirus disease 2019 (COVID-19), causes severe lower respiratory tract infections and acute respiratory failure syndrome (ARDS). Deaths due to the ongoing COVID-19 pandemic for more than a year are still seen worldwide. Therefore, vaccine trials have gained importance. The discovery of the genome and protein structure of SARS-CoV-2 in a short time allowed the development of nucleic acid-based vaccines (mRNA and DNA vaccines), vector vaccines, inactivated virus vaccines, protein-based vaccines, virus-like particle vaccines, and live attenuated virus vaccines. Many companies, universities, and institutes around the world continue to develop effective vaccines against SARS-CoV-2. In this review, the structural features, classification, genome, and intracellular entry of SARS-CoV-2 coronaviruses, stimulation of the immune system and immunity, COVID-19 vaccine types, and the latest status of clinical trials of these vaccines have been reviewed.
AtıfScopus1OpenAlex2İncele - MakaleYalnız künye2021Scopus SJRQ2Performance evaluation of IEEE 802.15.7 CSK modulation under blue shift effect of optical receiver filters
Küçük, Mehmet Ali; Türk, Kadir
In recent years, the use of light-emitting diodes (LEDs) in lighting, which has higher energy efficiency and longer-lasting environmentally friendly lighting compared to conventional lighting devices, has accelerated the development of a promising new technology for short-range wireless optical transmission called visible light communication (VLC). Besides other applications, VLC switches the LEDs at very high speeds to simultaneously realize indoor lighting and data transmission. But the intensity and color of the lighting may vary because of data transmission. Color shift keying (CSK) modulation defined in the IEEE 802.15.7 VLC standard guarantees constant light intensity and color. The CSK receiver uses a band-pass optical filter to separate the light channels. However, the transition band of optical filters shifts towards the blue wavelength depending on the incidence angle of the light which is called the blue shift effect. In this paper, the performance of the CSK receiver is investigated for the first time under the blue shift effect in the case of single and multiple transmitter LED cells. The numerical results show that the blue shift effect significantly decreases system performance. To eliminate the distorting effect, various methods and an adaptive equalizer-based CSK receiver are proposed. The proposed structures provide notable improvement.
AtıfScopus9WoS9OpenAlex7İncele - MakaleYayıncıda açık erişim2021Automatic extraction of trees by using multiple return properties of the lidar point cloud
Ozdemir, Samed; Akbulut, Zeynep; Karsli, Fevzi; Acar, Hayrettin
Airborne laser scanning has been a valuable tool for forestry applications since it began to be used commercially. Thanks to the high 3D resolution provided by the Light Detection and Ranging (LiDAR) point cloud, it has provided great convenience in complex 3D modeling processes needed for forestry applications such as forest inventory, forest management, determination of carbon stocks and the characterization of biodiversity. LiDAR data provides a new dimension in forestry applications with its high 3D resolution and multiple return characteristics. The extraction of woodland areas from the LiDAR point cloud has great importance for automating the determination of tree heights, species and stand frequency which will be used for generating canopy height models (CHM). In this study, woodland areas in the urban scene were automatically extracted by using the multiple return properties of the LiDAR point cloud. The proposed approach consists of three major steps namely pre-processing, parameter calculation and k-d tree search for trees which were implemented in MATLAB. In the first step, multiple return points have been identified from the LiDAR point cloud, which will be then used to determine possible tree locations. Then, by using Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm, neighborhood relations among the multi return points which were extracted from the initial point cloud data, were formed and a rule-based filter was applied by taking advantage of neighborhood relations. In addition, the initial point cloud was filtered with the Cloth Simulation Filtering (CSF) algorithm to separate ground and non-ground points where non-ground points used to extract trees. In the second step, non-vegetation points were removed by applying a threshold based on the change of curvature and planarity parameters, which are derived from the filtered non–ground point cloud. In the last step, in order to extract trees, a k-d tree structure was created from the filtered non-ground points to find nearest neighbors of each multi return point within a given diameter in the k-d tree structure. In order to evaluate the accuracy of the approach, the extracted boundaries were compared with the manually digitized woodland boundaries from the true orthophoto of the study area using correctness, completeness and quality metrics.
AtıfScopus27WoS23OpenAlex32TR Dizin6
İncele - MakaleYalnız künye2021Scopus SJRQ3The Effect of Grain Growth Temperature on the Trapped Magnetic Field of Y358 Superconductors
Başoğlu, M.
In this study, three different Y358 samples were produced by the melt-powder-melt-growth (MPMG) method at different maximum grain growth temperatures of 1030 °C, 1040 °C, and 1050 °C. The differential thermal analysis (DTA), X-ray powder diffraction (XRD), magnetic levitation force, trapped magnetic field values and magnetization measurements were performed. According to the results, the highest magnetic levitation force, the highest critical current density and the highest trapped magnetic field values were obtained from the sample produced at the temperature of 1050 °C.
AtıfScopus5WoS5OpenAlex5İncele - MakaleYalnız künye2021Scopus SJRQ2The effect of complementary and integrative medicine on symptom management and quality of life in Turkish oncology patients: a cross-sectional study
Demir Doğan, Melike; Savuci, Yıldız; Aydın Sayılan, Aylin
Aim: This study was conducted to determine the perceived effect of complementary and integrative medicine CIM) methods used by oncology patients on their symptom management and quality of life patients attending a Turkish oncology setting. Methods: 145 oncology Turkish oncology patients were surveyed between July 2018 and August 2018. Data were collected on personal and demographic information, the Edmonton Symptom Assessment Scale, The Nightingale Symptom Assessment Scale. Complementary and integrative medicine use was determined by the Complementary and Alternative Medicine (CAM) Scale. Results: Age had a positive significant correlation with CIM use, particularly manipulative and herbal approaches. Educational status had a negative significant correlation with CIM use and cognitive-behavioral therapy subscale. A positive significant correlation was determined between the duration of cancer diagnosis and the cognitive-behavioral therapies subscale. A positive significant correlation was determined between cognitive-behavioral therapies subscale and social well-being state. Conclusion: CIM approaches are commonly used by Turksih oncology patients.
AtıfWoS1OpenAlex1İncele - Kitap BölümüYalnız künye2021Is brexit a transaction cost problem?
Cicen, Yildirim Beyazit
This study analyzes the Brexit transaction cost concept. After the introduction, the transaction cost economics is explained in the first section. This section explains transaction cost progress with the contribution of Coase and Williamson. In the same section, the importance of transaction costs is also explained. This explains from which channels the transaction costs affect the economy. Williamson's Transaction Cost Economy is another subtitle in the same section. The relationship between governance and transaction costs is explained in section two. The third section explains the definition of political transaction costs, their importance and economic impacts. Brexit and political transaction costs are discussed in the last section. With Brexit, Britain is moving toward a new governance structure. The political transaction costs are expected to rise due to Britain's necessity to re-contract with the EU and other countries after Brexit. This rise in costs would impact the growth of Britain and the efficiency of the Brexit preference.
- MakaleAçık Erişim2021Scopus SJRQ4Optimization of three-element tuned mass damper for single degree of freedom structures under ground acceleration; [Yer ivmesi etkisi altındaki tek serbestlik dereceli yapılar için üç elemanlı ayarlı kütle sönümleyicinin optimizasyonu]
Araz, Onur
Passive control devices have been used for a long time to reduce unwanted vibrations. The most commonly used of these devices are tuned mass dampers. The optimum parameters of the three-element tuned mass damper for damped main structures due to ground acceleration are investigated in this paper. Unlike the traditional tuned mass damper, the three-element tuned mass damper contains two spring elements and one of them is connected in series with the damping element. The optimum parameters are obtained by simulated annealing algorithm. Numerical results show that the three-element tuned mass damper is very effective in reducing dynamic vibrations of the damped structures.
AtıfScopus30OpenAlex19TR Dizin1İncele