Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Kaygusuz, Abdullah(35)
- Sipahi, Ferkan(35)
- Karsli, Orhan(34)
- Dokuz, Abdurrahman(30)
- Duran, Celal(30)
- Kandemir, Raif(29)
- Ozdes, Duygu(28)
- Maden, Nafiz(27)
- Uzun, Sevda(27)
- Merdan, Mehmet(26)
- Vural, Alaaddin(26)
- Öztürk, Serkan(25)
- Araz, Onur(24)
- Kulakaç, Nurşen(24)
- Ashyralyyev, Charyyar(23)
- Yildiz, Salih(23)
- Yilmaz, Ozgur(23)
- Doğan, Kadir Caner(21)
- Arslan, Mehmet(20)
- Aydin, Faruk(20)
- Doğru, Bülent(20)
- Bayraktar, Alemdar(19)
- Kankal, Murat(19)
- Ayaydin, Hasan(18)
- Baltaci, Cemalettin(18)
- Yolcu, Halil(18)
- Cakir, Tufan(17)
- Cengiz, Ekrem(17)
- Demir, Selim(17)
- Gücer, Mehmet Ali(17)
- Akaryali, Enver(16)
- Artan, Seyfettin(16)
- Hayaloğlu, Pınar(16)
- Kaya, Afşin Ahmet(16)
- Tosunoğlu, Büşra(16)
- Uysal, Ibrahim(16)
- Kurt, Kemal(15)
- Ozturk, Samet(15)
- Reis, Hatice Catal(15)
- Aksakal, Vecihi(14)
Yayınlar
- MakaleYalnız künye2021Scopus SJRQ1Comparison of various turbulence model performance in computational fluid dynamics analyses of the oxidation ditches with experimental validation
Şibil, Rahim; Aras, Egemen; Kankal, Murat
Experimental and numerical studies were carried out to determine the full-scale Oxidation Ditch (OD) hydrodynamics considering various turbulence models. Firstly, the experimental work was carried out in a full-scale plant by Acoustic Doppler Velocimeter (ADV) for field-measurements. Secondly, the experimental data was used to validate numerical models by using Computational Fluid Dynamics (CFD) software Ansys Fluent. Eight different turbulence models were compared in the numerical study to predict full-scale hydrodynamics. Results showed that standard k-ε, renormalization group k-ε, realizable k-ε turbulence models gave more accurate prediction results with relative errors of 13 %, 17 %, and 18 % respectively, whereas the standard k-ω turbulence model gave the worst prediction results with 39 % relative error. This study also shows that the velocities in the ODs are very low without external force such as air diffusers, rotors, and mixer and there is no homogeneous flow field distribution in the ODs. Moreover, the maximum wastewater velocities occurred at the inlet and outlet.
AtıfScopus30WoS26OpenAlex32
İncele - MakaleYalnız künye2021Scopus SJRQ4Health research in vegan women
Özcan, Handan; Elkoca, Ayşe; Şahan, Özlem; Yilmaz, Sibel; Erişen, Begüm
Study Objectives: This planned research aimed to identify the conditions for women’s health in women who prefer vegan diets. Method: The study consists of vegan women and the sample consists of a total of 150 women who agreed to participate in the study. The data was collected through a questionnaire consisting of 34 questions. Associations and vegan women were reached out via social media. Results: The average age of the participants was 28.96±8.50 and 33.3% were married. The average year in which women continue to eat vegan is 3.29±5.25. 62% of vegan women stated that their menstrual periods were painless, 87.3% stated that their menstrual periods were regular, and 75.3% stated that they did not have any gynecological diseases. The most common complaints in vegan women are stress and anxiety (27.1%), continuous discharge (27.1), depression (25), polycystic ovary syndrome (20.8), urinary tract infection (20.8), and fibroids (12.5). 18% of vegan women had been diagnosed with anemia, of which 18.8% used anemia treatment. Conclusion: It was found that vegan women did not have many complaints in terms of gynecology while existing complaints were similar or even lower in terms of disease rates seen in the total population. The study group’s high level of education and awareness and regular health checkups are among the factors affecting the results. The low vegan diet averages of the women covered in the study and the fact that a greater number of women were out of reach show the limitations of the study.
- BildiriYayıncıda açık erişim2021On stable difference scheme for identification elliptic problem with integral and second kind boundary condition
Ashyralyyev, Charyyar; Cakalli, H.; Kocinac, L.D.R.; Ashyralyev, A.; Harte, R.; Dik, M.; Canak, I.; Kandemir, H.S.; Tez, M.; Gurtug, O.
In this study, the first order of accuracy difference scheme for approximate solution of source identification elliptic problem with integral and second kind boundary conditions is considered. Stability and coercive stability estimates for solution of the difference scheme are described. Moreover, test example with computation results is given.
- MakaleYalnız künye2021Scopus SJRQ1Geo-spatial multi-criteria evaluation of wave energy exploitation in a semi-enclosed sea
Şan, Murat; Akpınar, Adem; Bingölbali, Bilal; Kankal, Murat
The present study aims to determine priority areas for installation of wave energy converters (WECs) in a semi-enclosed sea using a multi-criteria, spatial, decision-making analysis based on geographical information systems (GIS). The study also suggests a new methodology for determination of suitable areas for WECs taking into consideration different extreme wave conditions, intra-annual variation of wave conditions, and operational range of wave conditions by the WECs. A case study over a distance of 1140 km along the coast in the southwest Black Sea is presented. In the multi-criteria analysis, areas with environmental, economic, technical and social constraints are excluded. Ocean depth, distance to ports, shore, power line, and sub-station, wave climate, and sea-floor geology are all evaluated for their impact on the system implementation and weighted according to their relevance. Thus, the final suitability index (SI) map is produced and spatial statistical significance of the suitable areas is checked using hotspot analysis. Based on this, Kırklareli coastal area and the area between İğneada Cape and Kıyıköy village are determined as primary priority areas. The sustainability parameters with different weights proposed in this study do not differentiate priority areas but affect the SI scores.
AtıfScopus33WoS27OpenAlex30İncele - MakaleYalnız künye2021Scopus SJRQ1A robust data simulation technique to improve early detection performance of a classifier in control chart pattern recognition systems
Ünlü, Ramazan
The quality control process is essential in maintaining the stability of production systems and proactively detecting abnormalities that may result in high mechanical and labor costs. In this study, a new data simulation strategy was devised to improve the early prediction performance (EPP) of an algorithm. Traditional control chart data simulation methods work based on creating abnormal patterns consisting of only abnormal signals. However, a classifier trained with data samples consisting of only abnormal data signals may fail to early detect abnormality in a real-time production line, in which abnormal signals is obscured by volume of normal signals. From this perspective, training a model by imitating real-world cases can improve the performance of an algorithm in terms of early detection of an abnormality. Normal and abnormal patterns were simulated by implementing a new approach called Mix Ratio Data Simulation (MRDS). The proposed methodology MRDS is compared with the customary data simulation method under the predefined scenarios in terms of EPP. The findings indicated that changing the way of simulating dataset increases the EEP of the machine-learning algorithm regardless of abnormality types and parameters.
AtıfScopus18WoS14OpenAlex17İncele - MakaleYalnız künye2021Scopus SJRQ2Geochronology, petrogenesis and tectonic importance of Eocene I-type magmatism in the Eastern Pontides, NE Turkey
Vural, Alaaddin; Kaygusuz, Abdullah
Eastern Pontides are hosted to many granitoids with different composition, size and age ranges from Paleozoic to Cenozoic. Of these granitoids, especially those of the Cenozoic age are commonly observed in the southern part of the Eastern Pontides, and rarely in the northern part. This paper focuses on the Eocene aged Avliyana Granitoid, located south of the Eastern Pontides, intruding into Late Cretaceous and Eocene volcanic and sedimentary rocks. The Avliyana Granitoid is mainly diorite and tonalite and composed of plagioclase, quartz, orthoclase, hornblende, biotite, pyroxene, and Fe-Ti oxides. It shows granular, locally poikilitic and micrographic texture. The Avliyana Granitoid has I-type, medium to high-K calc-alkaline, and metaluminous character, and has a narrow SiO2 contents (57–64 wt.%). The rocks are enriched in light rare earth elements (LREEs) and large-ion lithophile element (LILEs), and depleted in high field strength elements (HFSEs). Chondrite-normalized REE distributions are concave shaped (LaN/LuN = 5.87–11.92) and show negative Eu anomaly (Eu / Eu * = 0.55–0.81). Geochemical results show that plagioclase, pyroxene, hornblende, and Fe-Ti oxide fractionation are effective in the development of the rocks. The εNd(i) values of the rocks are between – 1.0 and – 0.1, 87Sr/86Sr(i) values are between 0.70531 and 0.70563, and the model ages (TDM) are between 0.79 and 0.93. U-Pb SHRIMP zircon ages of the Avliyana Granitoid rocks range from 45.60 ± 0.55 to 44.75 ± 0.36 Ma. In calculations made from zircon and apatite, the crystallization temperatures vary between 714 and 867 °C. The data revealed that the parental magma of the Avliyana Granitoid was derived from the enriched lithospheric mantle, and fractional crystallization and lesser assimilation played a role in the evolution of the rocks.
AtıfScopus16OpenAlex22İncele - MakaleYalnız künye2021Scopus SJRQ2Investigation of characterization and tribological behavior of composite oxide coatings doped with h-BN and graphite particles on ZA-27 alloy by micro-arc oxidation
Kaplan, Erdar; Sukuroglu, Ebru Emine; Cuvalci, Olkan
This paper investigates the tribological effects of composite oxide coatings grown on ZA-27 surfaces under dry sliding condition. Coating processes were conducted using three different electrolytic solutions through micro-arc oxidation (MAO) method. The base electrolytic solution without any particles as additives was labeled as MAO-Coated, whereas electrolytic solution labeled as Coated-A contained graphite particles and Coated-B contained hexagonal boron nitride (h-BN) particles incorporated into base solution. The morphology of each coated samples were analyzed using a Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD). The friction and wear tests were conducted using a pin-on-disc tester in order to evaluate the tribological behavior. Results indicated the friction coefficients of both Coated-A and Coated-B samples were lower when compared to that of uncoated ZA-27 alloy. Further comparative studies showed Coated-A samples containing graphite particles resulted in the lowest friction coefficient.
AtıfScopus13WoS12OpenAlex14İncele - MakaleYalnız künye2021Scopus SJRQ3Modification of the random differential transformation method and its applications to compartmental models
Bekiryazici, Zafer; Merdan, Mehmet; Kesemen, Tulay
In this study, a modification of the random differential transformation method is given by using Laplace-Padé method. The modification, which has previously been introduced for the deterministic differential transformation method (DTM), is used to obtain improved approximate expected values, variances, and confidence intervals for systems of random differential equations. Comparison of approximate results obtained from the random differential transformation method and the modified method are given to underline the improvement of the approximations. Epidemiological compartmental models of type SIR and SIIR are used to implement the modified method and demonstrate its advantages. Simulations and deterministic counterparts of the models are also investigated to confirm the suitability of the results of the approximations.
AtıfScopus14WoS12OpenAlex19İncele - MakaleYalnız künye2021Scopus SJRQ1Cost-oriented LSTM methods for possible expansion of control charting signals
Ünlü, Ramazan
Manual quality control may result in delayed detection of a system defect, or none at all, potentially resulting in malfunctions that can lead to disruption of the system, incur extra costs, or complete downtime of the system. To mitigate such issues, more advanced statistics and machine learning-based systems such as SVM, WSVM, etc. are used to automatically detect error signals during the process. However, these methodologies are not developed for sequential dataset such as a classical CCPR dataset. As a result, in this study, we have implemented a preliminary Cost-Oriented Long-Short Term Memory (LSTM), which is designed to learn from a sequential dataset and compare it with SVM and WSVM which are traditional methods utilized in the field. Additionally, we compared the performance of methods in terms of early detection of an abnormal pattern. Based on the findings, the Cost-Oriented LSTM method outperforms SVM and WSVM in the majority of abnormal patterns in terms of both classification and early detection performance. Global accuracy score which is the average of accuracy rates in all combination of abnormal parameters and window lengths shows that LSTM gives a better accuracy score than SVM and WSVM in all seven abnormal patterns detection.
AtıfScopus22WoS19OpenAlex22İncele - MakaleYalnız künye2021Scopus SJRQ3Flame atomic absorption spectrometric determination of total chromium and cadmium in bean samples after ultrasonic-assisted microextraction using ionic liquid Aliquat-336
Elik, Adil; Karakoy, Tolga; Çilesiz, Yeter; Altunay, Nail
A new and rapid microextraction approach termed as ultrasonic-assisted ionic liquid-based microextraction (UA-ILME) was developed using ionic liquid Aliquat-336 as extraction solvent for the extraction of chromium and cadmium in bean samples collected from different regions in Turkey. The total amounts of analytes in the samples were measured by flame atomic absorption spectrophotometry. The basis of the extraction step is based on the complexation of Cr(III) and Cd(II) with diethyldithiocarbamate at pH 4.0. The hydrophobic ternary complexes containing analytes were then rapidly extracted from the sample solution to the ionic phase under the ultrasonic effect using tricaprylylmethylammonium chloride (Aliquat-336). Some experimental variables (pH, ligand amount, extraction solvent volume, ultrasound time, extraction temperature and sample volume) were optimized in detail. Following the optimization steps, the limits of detection (LODs, 3Sblank/m) for Cr(III) and Cd(II) were calculated as 0.45 ng mL−1 with linear range of 1.5–380 ng mL−1 and 0.25 ng mL−1 with linear range of 0.8–220 ng mL−1, respectively. Enrichment factors and average recoveries were ranged from 125.8–96.4 to 92.7–106.5%, respectively. The accuracy and precision of the method were validated by analyzing a certified reference material and spiked recovery tests. The UA-ILME method was successfully applied to the determination of Cd and Cr in the samples, highlighting that the matrix ions under consideration do not affect the extraction and determination steps.
AtıfScopus4OpenAlex6İncele - Kitap BölümüYalnız künye2021Ombudsman as an Actor in Environmental Governance: A Conceptual Introduction
Doğan, Kadir Caner
- MakaleYalnız künye2021Scopus SJRQ1Adaptation of hurricane risk perception scale to earthquake risk perception and determining the factors affecting women's earthquake risk perception
Mızrak, Sefa; Özdemir, Ahmet; Aslan, Ramazan
Worldwide studies show that gender is an important variable affecting disaster risk perception and that women have high levels of disaster risk perception. The objective of this study is to investigate women’s earthquake risk perception as well as the factors that may help predict it. The data of the study were collected from 463 women living in Kocaeli (Turkey) by survey method. The study, which employed ordinary logistic regression analysis, analysed whether the same dependent variable was predicted by different independent variables in five models. Many of the women who participated in the research reported that they were more sensitive to earthquakes. The items with the highest mean among women's affective and cognitive risk perception factors are the items that measure fear and financial perception, respectively. Education and age significantly help predict women’s earthquake risk perception. Living in dread of earthquakes and being depressed and worried for future generations make women feel more sensitive. This study has showed that all the underlying factors affecting women's disaster risk perception should be understood more deeply. It is thought that the results of the study will contribute to studies related to disaster management, risk perception, and women.
AtıfScopus36WoS30OpenAlex55İncele - BildiriYalnız künye2021On well-posedness of source identification elliptic problem with nonlocal boundary conditions
Ashyralyev, Allaberen; Ashyralyyev, Charyyar; Zvyagin, Viktor G.; Ashyralyev, A.; Ashralyyev, C.; Erdogan, A.S.; Lukashov, A.; Sadybekov, M.
We study the well-posedness of the source identification problem for the two dimensional elliptic differential equation with nonlocal boundary conditions. Applying operator approaches, the exact estimates for the solution of this problem in Hölder norms are established.
- MakaleYalnız künye2021Scopus SJRQ1Analysis of relationships between nanotechnology applications, mineral saving and ecological footprint: Evidence from panel fourier cointegration and causality tests
Koç, Pınar; Gülmez, Ahmet
Analyzing the relationship between nanotechnology applications, mineral saving, and environmental degradation is important to achieve sustainable development goals. However, in the literature, no study empirically examines the interaction among nanotechnology applications, mineral saving, and environmental degradation. This study addresses this significant gap in the literature by investigating the impacts of nanotechnology applications on mineral saving and the ecological footprint in 9 countries (Australia, Canada, China, France, Japan, Korea, Russia, Sweden, and the USA) in the period 1990–2017 using the combined panel fourier fractional cointegration and panel fractional fourier causality test. According to the causality test results based on group statistics, there is a Granger causality from nanotechnology applications to mineral saving. Also, there is causality from mineral saving to ecological footprint. The estimations of the causality based on individual statistics show no causality linkage between nanotechnology applications and mineral saving in the countries, excluding Australia and France. Canada, China, France, and Sweden are countries with unilateral causality from nanotechnology applications to ecological footprint. In the other countries, except China, Japan, and the USA, mineral saving doesn't Granger cause ecological footprint. The long-run findings show a positive impact of nanotechnology applications on mineral saving and ecological footprint. These findings are valid for all countries. In this context, it can be concluded that nanotechnology applications are essential for resource-saving. But, to save resources, the authorities should focus on controlling and measuring nanoparticle emissions.
AtıfScopus10WoS8OpenAlex11İncele - Kitap BölümüYalnız künye2021The effect of covid-19 pandemic on solidarity culture in Turkey
Kose, Asli
COVID-19 outbreak has become important problem of the World in 2020. World Health Organization accepted COVID-19 outbreak a pandemic on March 11, 2020. With the pandemic workplaces closed and production decreased. COVID-19 pandemic is affecting Turkey socially and economically as it is affecting many countries in global health. In Turkey, it is determined the first corona virus cases in March 2020. It may have some negative economicial, educational, agricultural and public health effects. This study includes a content that evaluates the adversities of the COVID-19 pandemic affecting social assistance. Social assistances are usually planned by central governments and implemented by local governments. Municipalities, one of the local governments, are one of the important institutions in delivering social assistances to the puclic. Central goverment and local goverments tried to support the public with social benefits by using different resources in COVID-19 pandemic. In this process, the culture of solidarity came to the fore. Turkey is experiencing the most beautiful examples of solidarity culture of the country in location. The world has also contributed positively to its image in addition to creating social benefits with the helth aids provided. The need for social assitances is excepted to increase in the face the consequences of the crisis in the future period. This situation will increase the need of public institutions for governance.
- MakaleYalnız künye2021Scopus SJRQ1Static resistance of axially loaded multiplanar gap KK-joints of Circular Hollow sections at elevated temperatures
Wang, Y.C.; Ozyurt, E.
This paper presents the results of a numerical investigation of the behaviour, and proposes a method to calculate the static resistance of axially loaded Circular Hollow Section Double K-joints (DKK) at elevated temperatures. This type of joints is widely used in building construction, but currently, there is no method to calculate their static resistance at elevated temperatures. The numerical investigations of this paper cover a wide range of design parameters, including brace axial load combination, joint temperature, angles between brace members, longitudinal and transverse gap sizes, chord diameter to thickness ratio and brace diameter to chord diameter ratio. The results of this paper indicate that the ratio of joint elevated temperature resistance to ambient temperature resistance may be lower than the reduction factor for the yield strength of steel at elevated temperatures. There are two joint failure modes, one for small and one for large transverse gap. These failure modes and the demarcation between small and large gaps are independent of joint temperature. For joints with large gap, the ratio of joint resistance at elevated temperature to that at ambient temperature is close to the average of steel yield strength and Young's modulus reduction factors at elevated temperature. For joints with small gap, the joint resistance ratio follows the steel Young's modulus factor variation at elevated temperature if all four braces are under compression, but the trend changes to the average ratio of steel Young's modulus and yield strength reduction factors if the axial brace loads are balanced (compression in two brace members equal to tension force in the other two brace members). Linear interpolation can be applied between these two different loading cases.
AtıfScopus17WoS15OpenAlex17İncele - Derleme MakaleYalnız künye2021Scopus SJRQ1Assessment of the relationship between renewable energy and employment of the United States of America: Empirical evidence from spectral Granger causality
Çelik, Orkun
In this study, the spectral Granger causality nexus between renewable energy generation and employment for the period February 1973–September 2019 in the USA is examined. The results obtained from the study expresses that there is no spectral Granger causality relationship between renewable energy generation and employment for aforementioned period in the USA. Furthermore, these findings support neutrality hypothesis, which means that there is no causality relation between the variables. In other words, renewable energy generation does not influence employment and employment does not have an effect on renewable energy generation.
AtıfScopus16WoS14OpenAlex20
İncele - MakaleYalnız künye2021Scopus SJRQ3The solutions of multiplicative Hermite differential equation and multiplicative Hermite polynomials
Yalçın, Numan
In this work, we give the power series solutions around an ordinary point, in the case of variable coefficients, homogeneous multiplicative differential equations of 2nd order. Further, we introduce the multiplicative Hermite differential equations, multiplicative Hermite polynomials and basic properties of these polynomials.
AtıfScopus17WoS18OpenAlex23İncele - MakaleYalnız künye2021Scopus SJRQ3The effect of chewing gum on dry mouth, interdialytic weight gain, and intradialytic symptoms: A prospective, randomized controlled trial
Ozen, Nurten; Aydin Sayilan, Aylin; Mut, Dilek; Sayilan, Samet; Avcioglu, Zeynep; Kulakac, Nursen; Ecder, Tevfik; Akyolcu, Neriman
Introduction The major salivary glands can be stimulated by chewing gum to increase saliva flow and decrease xerostomia. The aim of this study was to investigate the effect of chewing gum on dry mouth, interdialytic weight gain, and intradialytic symptoms in hemodialysis (HD) patients. Methods This prospective randomized controlled single-blind study was conducted with patients who had been treated for at least 6 months with sessions 3 days a week for 4 hours at two HD units. Patients were randomly allocated to chewing gum group or the control group. In the chewing gum group, gum was chewed for 10 minutes six times a day, and when the patients felt mouth dryness or were thirsty. In the nonchewing gum group, gum was not chewed. The patients were followed-up for 3 months. A total of three saliva samples were taken before starting treatment at the first, 12th, and 36th HD session. Data were collected with the Visual Analogue Scale (VAS), Hemodialysis Patients Fluid Control Scale, Dialysis Symptom Index, and Hospital Anxiety and Depression Scale at baseline, week 4, week 8, and week 12. Findings The study was completed with a total of 44 patients consisting of 22 patients in the each group. The second and third month VAS values (xerostomia) of the patients in the chewing gum groups were statistically significantly lower than those in the control group (P= 0.014,P < 0.001, respectively). The third month salivary flow rate in the chewing gum group was higher than the values in the control group patients (P < 0.001). Discussion It is anticipated that this study will raise nurses' awareness of dry mouth and encourage future studies on interventions to increase the salivary flow rate to prevent or treat dry mouth.
AtıfScopus18WoS19OpenAlex27İncele - MakaleYalnız künye2021Scopus SJRQ2Non-targeted approach to detect green pea and peanut adulteration in pistachio by using portable FT-IR, and UV-Vis spectroscopy
Menevseoglu, Ahmed; Aykas, Didem Peren; Adal, Eda
Pistachio is one of the most expensive nuts with having high economic importance in Turkey. It has become more prone to adulteration because of its high commodity value. Peanut with color additives and green pea are generally used to adulterate ground pistachio. Vibrational spectroscopy is a potential technique to detect adulterations in pistachio. The objective of this study was to generate a non-targeted method for portable FT-IR and UV-Vis spectrometers to authenticate pistachio and detect green pea and peanut adulterations. Pistachio granules were adulterated with green pea and peanut at different concentrations (5 to 40% w/w). Spectra were collected by a portable FT-IR spectrometer and by a conventional UV-Vis spectrometer and analyzed by Soft Independent Modeling of Class Analogy (SIMCA) to generate classification algorithms to authenticate pistachio, and Partial Least Square Regression (PLSR) to predict the concentrations of adulterants. SIMCA showed very distinct clusters for pure samples. Moreover, adulterated pistachio samples were discriminated by SIMCA even in low levels of adulteration (5%). Portable FTIR showed excellent performance (r(val) > 0.93) of predicting the adulterant levels with a standard error of prediction (SEP) 0.66% and 0.80% for green pea and peanut, respectively. Similarly, UV-VIS predicted (r(val) > 0.93) the adulterant levels with SEP 0.58% and 0.14% for green pea and peanut, respectively. The results supported that portable FT-IR, and UV-Vis units present great potential for real-time surveillance of green pea and peanut adulteration in pistachio.
AtıfScopus13WoS12OpenAlex15İncele