Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dertli, Enes(115)
- Kaya, Yunus(50)
- Ayata, Ümit(48)
- Şahin, Engin(48)
- İspirli, Hümeyra(46)
- Bayraktar, Bülent(42)
- Şenay, Volkan(41)
- Can, Zehra(39)
- Özen, Soner(37)
- Bayram, Sinan(35)
- Pat, Suat(35)
- Öztürk, Mesut(35)
- Ecem Bayram, Nesrin(34)
- Esmer, Yusuf(34)
- Battal, Fetullah(33)
- Artar, Musa(32)
- Öner, Erdal(32)
- Korkmaz, Şadan(31)
- Yilmaz, Mustafa Tahsin(31)
- Ertugrul, Mehmet(30)
- Mercan, Emin(30)
- Hasar, Ugur Cem(29)
- Kutlu, Naciye(28)
- Özdemir, Akın(27)
- Kul, Murat(26)
- Cuce, Erdem(25)
- Kamiloğlu, Aybike(25)
- Bayram, Ozkan(24)
- Sefali, Abdurrahman(24)
- Sert, Durmuş(24)
- Çolak, Murat(24)
- Ayazoglu, Rabil(22)
- Gıdık, Betül(22)
- Maden, Sedat(22)
- Ustabulut, Mete Yusuf(22)
- Uçurum, Metin(22)
- Akeren, Zahide(21)
- Dirican, Ebubekir(21)
- Kara, Yakup(21)
- Abdioglu, Murat(20)
Yayınlar
- MakaleYalnız künye2024Scopus SJRQ2Metacognitive training for algebra teaching to high school students: An action research study
Okumuş, Özlem; Öztürk, Mesut
Metacognition is an essential concept in mathematics education research. Studies indicate that high school students in Turkey must demonstrate expected success in learning mathematics in general and algebra in particular. To this end, the Ministry of National Education has initiated a mathematical mobilization in Turkey. Mathematics mobilization is a project that will adapt the learning of mathematics to daily life skills, making learning more accessible and ensuring that students love this course from an early age. In the initial interviews with teachers as part of this mobilization, teachers stated that high school students needed to exhibit sufficient metacognitive planning and monitoring strategies. Therefore, they required assistance in planning and monitoring their learning processes and motivating them to learn. The literature shows that metacognitive planning and monitoring are effective in teaching algebra. In this context, the research “How can metacognitive strategies be developed in high school students’ algebra learning?” seeks an answer to this problem. Based on preliminary teacher interviews, the researchers created action plans in collaboration with teachers. In the circular model, researchers tested these action plans and revised them. As a result of the cycle being repeated three times, researchers developed a teaching technique based on metacognitive planning and monitoring for high school students. The study's findings demonstrate that metacognitive training taught students metacognitive planning, monitoring, prediction, awareness, and motivation strategies.
AtıfScopus3WoS3OpenAlex4
İncele - MakaleYalnız künye2024Scopus SJRQ3Facile biomimetic synthesis of AgNPs using aqueous extract of Helichrysum arenarium: characterization and antimicrobial activity
Yilmaz, Mustafa Tahsin; İspirli, Humeyra; Taylan, Osman; Balubaid, Mohammad; Dertli, Enes
The present study focuses on synthesis of silver nanoparticles (AgNPs) by employment of a green and facile synthesis method. Aqueous extract of Helichrysum arenarium was used as a reducing and capping agent. The bioreduction of silver particles was monitored using UV–Vis spectroscopy based on increase in color intensity led by surface plasmon resonance. SEM, TEM, FTIR, DSC, and XRD analyses were followed for characterization, divulging that the nanoparticles were thermally resistant in the size of approximately 20 nm with a quasi-spherical shape without any agglomeration. AgNPs possessed a nanocrystal form with presence of crystalline Ag. EDAX analysis was used to verify that the nanoparticles were silver as revealed by a typical optical absorption peak of metallic silver nanocrystallites. The AgNPs were shown to have strong antibacterial and antifungal effects on some foodborne pathogens. The method developed in this study could offer a green, facile biomimetic, and cost-effective method.
AtıfScopus3WoS2OpenAlex3İncele - MakaleAçık Erişim2024Scopus SJRQ1Are students with high creativity skills successful writers? A parallel mediation model
Sarikaya, Ismail
The relationship between creativity and writing success is a matter of curiosity for many researchers, educators, and people in general. Many would likely expect that creative individuals would have higher writing success. This study aimed to determine the mediating roles of writing self-efficacy, writing motivation, and writing disposition in the relationship between creativity and writing success of primary school students. A relational research model was used in the study conducted with 300 primary school students. Correlational analysis and mediating variable analysis were performed with the data obtained with five data collection tools. The analysis results showed significant relationships between the variables: Creativity, writing self-efficacy, writing motivation, and writing disposition were found to significantly predict writing success. In addition, the findings revealed that writing self-efficacy, motivation, and disposition each have a parallel mediating role between creativity and writing success. The study's results are discussed in connection to the pertinent research literature, and recommendations are made.
AtıfScopus5WoS4OpenAlex4İncele - MakaleAçık Erişim2024Scopus SJRQ3Effect of Calcium Lignosulfonate Additive on Some Physical and Mechanical Properties of High-Density Fiberboard
Çamlibel, Osman; Ayata, Ümit; Peker, Hüseyin
Calcium lignosulfonate (CLS) (C20H24CaO10S2) is widely used in various industries today, including wood, construction, food, agriculture, and textiles. There are currently few studies on the addition of CLS chemicals to various fiberboards. This study was designed to explore the outcomes of the interaction between CLS and the boards, with the aim of expanding the potential applications of this chemical. We incorporated CLS at varying percentages (6%, 8%, and 10%) as an adhesive ad-ditive in high-density fiberboard (HDF) produced using urea-formaldehyde (UF) resin in a labor-atory setting. We assessed its impact on several physical properties - thickness swelling (TS), den-sity, and water absorption (WA) - and mechanical properties: modulus of rupture (MOR), internal bond strength (IB), modulus of elasticity (MOE), and surface soundness (SS). A control group was created using prepared boards, enabling the comparison of results between boards made with and without CLS additives. According to the results of a multivariate analysis of variance, the CLS per-centage showed no significant effect on density, MOE, and SS. However, it significantly influenced TS, WA, IB, and MOR, resulting in reductions of 4-12% for SS, 6-12% for MOR, and 2-22% for IB, while increasing TS by 20-130%, WA by 25-84%, and MOE by 1-3%. It was observed that the use of CLS led to differing results in the tests conducted on the produced HDF materials.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2024Scopus SJRQ4PREDICTION OF TURKEY'S COTTON SOCK EXPORTS TO GERMANY USING DEEP LEARNING APPROACH; [TÜRKİYE'NİN ALMANYA'YA PAMUKLU ÇORAP İHRACATININ DERİN ÖĞRENME YAKLAŞIMI İLE TAHMİNİ]
Özbek, Ahmet; Teke, Çağatay
Cotton socks are a strategic export product for Turkey. Therefore, the aim of this study is to forecast Turkey's exports to Germany, the world's largest cotton socks market. In order to achieve this objective, the determinants of exports were identified by analysing the literature. Then, expert opinion was sought to determine the importance of these factors for Turkey's cotton socks exports to Germany. Using the deep learning model created from the factors determined as a result of the expert opinion, the prediction of the export of Turkish socks to Germany was realised. A success rate of 96% was achieved with the prediction.
AtıfScopus1OpenAlex1TR Dizin1
İncele - MakaleAçık Erişim2024Scopus SJRQ2Analysis of an actively controlled composite box manipulator without external actuator
Lök, Şefika İ; Malgaca, Levent; Uyar, Mehmet
This study focuses on active vibration control for a single-link composite box manipulator by using a single actuator for driving and control actions. Model extraction and system identification techniques are studied to obtain mathematical models of the manipulator. The state space model is extracted from the finite element model using modal analysis conducted in ANSYS, while the system identification approach is an experimental modeling method using the input and output signals of the system. The input signals are defined as triangular and trapezoidal motion profiles, while the output signals are the acceleration signals of the manipulator. Proportional derivative and positive position feedback controllers are implemented on the obtained mathematical models to reduce residual vibrations. The simulation results are successfully verified by experiments, and uncontrolled/controlled results are evaluated with reduction rates.
AtıfScopus3WoS3OpenAlex2İncele - MakaleAçık Erişim2024Scopus SJRQ3A Study on Recognizing the Value of Chestnut (Castanea sativa) Blossom Waste
Sahin, Huseyin; Kolayli, Sevgi; Kara, Yakup; Can, Zehra; Guler, Halil Ibrahim; Ozkok, Asli; Serdar, Umit
Chestnut (Castanea sativa) blossoms are natural resources that are not put to economic use. They are completely mixed with soil as waste. Thus, this extensive study was designed and remarkable results were found showing the potential usefulness of chestnut blossoms. In addition to the phenolic capacity and antioxidant capacity of the aqueous and ethanolic extracts of dried chestnut flowers, the anti-urease activity of these extracts was studied to demonstrate their therapeutic value. The binding interaction of phenolic substances present in chestnut blossom with urease was shown using molecular docking research. The aqueous extract, with most effect, had total phenolic content of 46.67 ± 0.37 mg GAE/g and total flavonoid content of 6.14 ± 0.40 mg QUE/g. The antioxidant activity was determined by FRAP (648.47 ± 5.27 µmol FeSO4.7H2O/g for aqueous extract and 347.53 ± 2.09 µmol FeSO4.7H2O/g for ethanolic extract) and DPPH (0.05 ± 0.01 mg/mL for SC50 of aqueous extract and 0.11 ± 0.01 mg/mL for SC50 of ethanolic extract) assays, and rutin was found to be the dominant phenolic compound according to HPLC. IC50 values for urease in aqueous and ethanolic extracts were 2.55 ± 0.09 mg/mL and 4.57 ± 0.24 mg/mL, respectively. According to the docking experiments, which were important to support the hypothesis of anti-urease activity, myricetin and luteolin showed different and effective bonding degrees to the target protein when compared with the reference molecule acetohydroxamic acid. In summary, chestnut flowers are rich in phenolic compounds which are responsible for a wide range of biological activities including antioxidant features and urease inhibition. These blossoms could be evaluated as potentially important raw materials for food.
AtıfScopus6WoS6OpenAlex6TR Dizin1İncele - MakaleAçık Erişim2024Scopus SJRQ3The Knowledge of Middle Level Math Teachers Regarding Inclusive Students’ Misconceptions About the Concept of Angle
Gürefe, Nejla; Güven Akdeniz, Dilşad
The authors examined the knowledge of middle level mathematics teachers instructing in inclusive classrooms to the hearing impairments students (HISs) or learning disabilities students (LDSs). The focus was on teachers’ understanding of students’ misconceptions related to the concept of angles. The study aimed to investigate the teachers’ role in identifying the underlying perceptions of misconceptions among HISs and LDSs as well as their ability to offer effective solutions. The mathematics teachers responsible for HISs and LDSs were the subjects of this cross-case study, with the unit of analysis being teachers’ knowledge of misconceptions concerning the concept of angles. Face-to-face interviews were employed to collect data, and subsequent analysis utilized a cross-case approach. The study findings revealed that both groups of teachers encountered numerous misconceptions for the first time. While teachers of HIS (HIST) identified the source of misconceptions as either teachers or students, teachers of LDS (LDST) more frequently attributed misconceptions to teachers and employed various representations to address and dispel these misconceptions. The authors recommended that teachers develop deep understanding of their students and identify potential misconceptions and that they explore diverse methods for taking precautions to prevent misconceptions.
AtıfScopus1OpenAlex1İncele - MakaleAçık Erişim2024Scopus SJRQ1Optimization of mechanochemical surface modification parameters on planetary mill using an I-optimal experimental design
Özdemir, Akın; Uçurum, Metin
Several micro-particle-size additives and filler minerals are added to many industrial products, especially plastic, in order to reduce cost and improve mechanical properties and appearance. Also, grinding and surface modification are two fundamental properties of the filler minerals used in plastic products. Notably, Bayburt stone (BS) used as a natural raw material from Bayburt, Türkiye contains 76% SiO2 and 15% Al2O3. In this paper, the hydrophilic surface structure of micronized Bayburt stone (MBS) was made hydrophobe by mechanochemical surface modification using calcium stearate [Ca(C17H35COO)2] in a laboratory-type planetary mill. Next, the optimum conditions of the surface modification design factors, which are (1) ball filling ratio = 30.53%, (2) powder filling ratio = 10.43%, (3) mill speed = 475.91 rpm, (4) chemical dosage = 1.99% of powder, and (5) modification time = 4.83 min., were obtained using the proposed I-optimal design-focused optimization model when predicting the model parameters. In addition, a coated micronized Bayburt stone (CMBS) product with an active ratio (AR) of 99.90% and d10, d50, and d90 values of 1.32 μm, 3.48 μm and 9.55 μm were achieved. Finally, particle size distribution (PSD), thermo-gravimetric and differential thermal analyzer (TG-DTA), Fourier transform infrared (FTIR), scanning electron microscope (SEM), electron dispersive spectrum (EDS), and contact angle analyses were performed on the CMBS product.
AtıfScopus5WoS6OpenAlex6İncele - MakaleAçık Erişim2024Scopus SJRQ4Bibliometric Analysis of Sport Entrepreneurship Literature: The Case of Web of Science; [Spor Girişimciliği Literatürünün Bibliyometrik Analizi: Web of Science Örneği]
Esmer, Yusuf; Dertli, Şükran
Sport entrepreneurship is the sport dimension of entrepreneurship and research on the concept has increased in recent years. The aim of this research is to provide a general perspective on sports entrepreneurship, to draw attention to the importance of the subject and to generate ideas for further research. For this purpose, bibliometric analysis technique was used in the research. In this context, 494 publications on sport entrepreneurship in the WoS database were examined under 7 headings (advanced search, cited references, co-author analysis, common word analysis, citation analysis, bibliometric matching analysis, co-citation analysis). These titles were analyzed in a total of 32 parameters and analyzed bibliometrically with Sankey diagram, VOSviewer, MapChart and Wordclouds programs. When the researches on sports entrepreneurship were examined, it was determined that the most publications were made in 2020 and the most citations were made in 2021, and the title, keyword, abstract, research area and WoS categories specified in the publications were related to each other. In this context, it has been seen that the basis of the structure in the relevant literature is sports, entrepreneurship, management, business and innovation. Although bibliometric studies have been conducted in the field of entrepreneurship in national literature, bibliometric analysis of sports entrepreneurship has not been carried out in a comprehensive manner, the number of studies in the international literature is low, and the use of more parameters and more data in this research than the studies conducted in the international literature reveals the importance and originality of the research.
AtıfScopus2WoS1OpenAlex1İncele - MakaleAçık Erişim2024Scopus SJRQ4Religious Attitude of the Great Mongol Khans (Chinggis, Ögödei Güyüg and Möngke Period); [Büyük Moğol Hanlarında Dinî Müsamaha (Cengiz, Ögedey, Göyük ve Möngke Dönemi)]
Durmuşoğlu, Kurban
The Great Mongol Khans were leaders who played an essential role in establishing and expanding the Mongol Empire. These leaders tried to keep the religious elements within the empire together since its establishment. Of course, in addition to the Mongol Khans’ attitudes, the period’s political conditions also greatly affected this. The Mongol Khans also took shape according to the political atmosphere of the period from the establishment and shaped their religious practices within this framework. Religious life during the Mongol Khan period presented a very colourful appearance. This situation caused the religious situation during the Mongol period to be quite complex and to change in the historical process. Although shamanist beliefs were widespread in the early Mongol periods, as the Mongols expanded their borders, they also tolerated the religions in the lands they “conquered” and accepted some elements of these religions. Due to theMongols’vast geography and the fact that they included different cultures, many religions, such as Islam, Buddhism, and Christianity, became widespread, and the Mongol Khans generally did not interfere with these religions and sometimes even protected them. The Mongols have encouraged religious tolerance and respected different beliefs since their founder, Chinggis Khan. Chinggis Khan had people of different religions as advisors in his administration, allowing them to practice their religion freely. This led to tolerance of Islam, Buddhism, Christianity, and other beliefs during the reign of Chinggis Khan’s successors. This policy facilitated trade and interaction between different peoples within the Mongol Empire and played an active role in gaining the loyalty of various ethnic and religious groups under their rule. Thus, people of other religions could rise to important positions within the empire. However, this tolerance policy differed in every period and place, and some Mongol khans could be more oppressive. In addition, religious attitudes during the Mongol khan period varied depending on political and strategic goals. Therefore, since the religious attitudes of theMongol khans changed over time, it may not be easy to talk about a general religious attitude. In this study, the religious attitudes of the Mongolian Khans in the period from Chinggis Khan to Möngke are examined, and information is given about which religions the Mongolian Khans had and what kind of relationship they had.
AtıfScopus1OpenAlex2TR Dizin2İncele - MakaleAçık Erişim2024Scopus SJRQ1Assessment of Different Methods for Estimation of Missing Rainfall Data
Hırca, Tuğçe; Eryılmaz Türkkan, Gökçen
Missing data is a common problem encountered in various fields, including clinical research, environmental sciences and hydrology. In order to obtain reliable results from the analysis, the data inventory must be completed. This paper presents a methodology for addressing the missing data problem by examining the missing data structure and missing data techniques. Simulated datasets were created by considering the number of missing data, missing data pattern and missing data mechanism of real datasets containing missing values, which are often overlooked in hydrology. Considering the missing data pattern, the most commonly used methods for missing data analysis in hydrology and other fields were applied to the created simulated datasets. Simple imputation techniques and expectation maximization (EM) were implemented in SPSS software and machine learning techniques such as k-nearest neighbor (kNN), together with the hot-deck were implemented in the Python programming language. In the performance evaluation based on error metrics, it is concluded that the EM method is the most suitable completion method. Homogeneity analyses were performed in the Mathematica programming language to identify possible changes and inconsistencies in the completed rainfall dataset. Homogeneity analyses revealed that most of the completed rainfall datasets are homogeneous at class 1 level, consistent and reliable and do not show systematic changes in time.
AtıfScopus22WoS23OpenAlex27İncele - MakaleAçık Erişim2024Scopus SJRQ1Evaluation of Dynamic and Fatigue Behavior of Damaged Steel Beams Strengthened with Different Types of Techniques and a New Strengthening Method Proposal
Ergün, Mustafa; Ateş, Şevket
In recent years, the use of carbon fiber-reinforced polymers to strengthen fatigue-damaged steel beams has increased significantly as an alternative to traditional methods due to their easy application to the damaged area, lightweight, durability, and sustainability. In addition to all these positive contributions, there are some disadvantages, such as debonding damage under loading. These disadvantages encourage researchers to produce new materials or apply materials used for other purposes in other fields for fatigue damage. In this paper, an alternative new strengthening technique is mentioned to improve the dynamic and fatigue behavior of fatigue-damaged steel beams. This technique is a strengthening application made using epoxy-based filler and carbon fiber-reinforced polymer fabric. Numerical and experimental studies are carried out on fatigue-damaged steel beams by applying this new technique and using different carbon fiber-reinforced polymers, such as a single and double layer of fabric and a single plate layer. The most significant improvement in dynamic behavior occurred on the specimen, strengthened with this newly proposed technique. In contrast, the lowest increase occurs on the sample strengthened with a single layer of fabric. While the lowest increase arises on the sample strengthened with a single layer of fabric in terms of fatigue life, the most significant progress in fatigue behavior makes on the sample strengthened with a single plate layer. As a result of comparing the results, it is concluded that this new strengthening technique could be an essential alternative to the currently used strengthening methods.
AtıfScopus2WoS2OpenAlex3İncele - MakaleYalnız künye2024Scopus SJRQ4Earthquake convexity and some new related inequalities
Kadakal, Mahir; Işcan, Imdat; Kadakal, Huriye
Unfortunately, eleven of our provinces were severely affected due to two severe earthquakes that occurred in our country, the Republic of Turkey, on February 6, 2023. As a result, thousands of buildings were destroyed and tens of thousands of our citizens lost their lives. From past to present, such disasters have occurred in many parts of our world and will continue to happen. In order to raise awareness for researchers and academicians reading our article, we will give a new definition of convexity in this article, and we will call it "earthquake convexity". In this paper, we study some algebraic properties of the earthquake convexity. Then we compare the results obtained with both Hölder, Hölder-Işcan inequalities and power-mean, improved power-mean integral inequalities and show that the results obtained with Hölder-Işcan and improved power-mean inequalities are better than the others. Some applications to special means of real numbers are also given.
AtıfWoS1OpenAlex3İncele - MakaleAçık Erişim2024Scopus SJRQ1Evaluation of lavender essential oils and by-products using microwave hydrodistillation and conventional hydrodistillation
Kırkıncı, Seran; Gercek, Yusuf Can; Baştürk, Fatma Nur; Yıldırım, Nazlıcan; Gıdık, Betül; Bayram, Nesrin Ecem
This study investigated the impact of two extraction methods, traditional hydrodistillation (TDH) and microwave-assisted hydrodistillation (MAH), on the essential oil yield and chemical profile of Lavandula angustifolia L., as well as the bioactive potential of the resulting wastewater. Essential oil composition was analyzed via GC–MS, revealing similar qualitative and quantitative profiles for both methods, with α-terpinolene and (–)borneol as major constituents. Wastewater analysis via LC–MS/MS and spectrophotometric assays demonstrated the presence of significant total phenolic content (3.29–1.78 mg GAE/g) and 32 individual phenolics (463.1 µg/kg for TDH; 479.33 µg/kg for MAH). These findings suggest that both essential oil and wastewater obtained by either method possess considerable bioactive potential, with the MAH method potentially offering advantages over TDH for essential oil extraction. Further exploration of wastewater applications in various industrial sectors is warranted.
AtıfScopus25WoS22OpenAlex22
İncele - MakaleAçık Erişim2024Scopus SJRQ2Exploring alternative polymer materials for joint liners: a software-guided material selection
Yilmaz, Galip; Gerdan, Zeynep; Çolak, Murat
This study explores the alternative polymer materials and selection process for joint implant liners, focusing on applying CES Selector software to identify suitable polymer materials. CES Selector provides an easy-to-use interface. It offers multiple selection methods, including boundary values and property constraints. Seven materials were excluded from the analysis, resulting in 19 potential candidates, including unconventional options like EVOH, PCTA, PESU, PI, PPA, PPC, PPSU, and PSU. The materials underwent evaluation based on key criteria, including tensile strength, Young’s modulus, compressive strength, fatigue strength, and fracture toughness. Overall, TPU exhibited a remarkable combination of high mechanical strength and adaptable Young’s modulus, making it a top contender. However, in other evaluation criteria, PI surpassed TPU, solidifying its potential as a superior choice. This systematic approach provides valuable insights for engineers and designers seeking innovative materials for joint implant liners. The study results broaden the range of materials used in implant manufacturing, providing potential alternatives that offer better long-term durability and performance.
- MakaleAçık Erişim2024Scopus SJRQ2Foundational Engineering of Artificial Blood Vessels’ Biomechanics: The Impact of Wavy Geometric Designs
Yilmaz, Galip
The design of wavy structures and their mechanical implications on artificial blood vessels (ABVs) have been insufficiently studied in the existing literature. This research aims to explore the influence of various wavy geometric designs on the mechanical properties of ABVs and to establish a foundational framework for advancing and applying these designs. Computer-aided design (CAD) and finite element method (FEM) simulations, in conjunction with physical sample testing, were utilized. A geometric model incorporating concave and convex curves was developed and analyzed with a symbolic mathematical tool. Subsequently, a total of ten CAD models were subjected to increasing internal pressures using a FEM simulation to evaluate the expansion of internal areas. Additionally, physical experiments were conducted further to investigate the expansion of ABV samples under pressure. The results demonstrated that increased wave numbers significantly enhance the flexibility of ABVs. Samples with 22 waves exhibited a 45% larger area under 24 kPa pressure than those with simple circles. However, the increased number of waves also led to undesirable high-pressure gradients at elevated pressures. Furthermore, a strong correlation was observed between the experimental outcomes and the simulation results, with a notably low error margin, ranging from 19.88% to 3.84%. Incorporating wavy designs into ABVs can effectively increase both vessel flexibility and the internal area under pressure. Finally, it was found that expansion depending on the wave number can be efficiently modeled with a simple linear equation, which could be utilized in future designs.
AtıfScopus2İncele - MakaleYayıncıda açık erişim2024Scopus SJRQ1Meditating role of career sustainability in the relationship between teachers’ self-efficacy and job satisfaction and subject well-being
Özbilen, Uğur; Güven, Ahmet Zeki; Yiğit, Ömer; Kara, Ömer Tuğrul; Banaz, Emrullah
The main purpose of this study, explore the mediating role of career sustainability in the relationships between teacher self-efficacy, job satisfaction, and subjective well-being. Teachers should have an acceptable level of satisfaction regarding self-efficacy, career sustainability, and job satisfaction to secure well-being. In a sense, this claim mandates revealing the relationships between these variables. Accordingly, we collected data from 369 Turkish language teachers aged 24–55 years employed in public schools using the Teacher Self-Efficacy Scale, Short Index of Job Satisfaction, Career Sustainability Scale, and Subjective Well-Being Scale and tested a mediation model to seek answers to our hypotheses. We collected the data using an online questionnaire battery web-based survey (Google Forms) which was created using data collection measures and demographic items. After creating the survey using Google Forms, we distributed it through various channels such as email lists, social media platforms, and professional networks (e.g., teacher WhatsApp groups, teacher Telegram groups, etc.). Respondents were invited to participate in the survey voluntarily. The findings showed that career sustainability mediated the relationships between teacher self-efficacy, job satisfaction, and subjective well-being. Accordingly, we may claim that teachers with desirable career sustainability are likely to have increased job satisfaction and well-being, contributing to their self-efficacy. This research emphasises the essential significance of career sustainability in the overall well-being and work satisfaction of teachers. Future study should investigate treatments aimed at improving career sustainability and examine these linkages in other cultural settings.
AtıfScopus8WoS7OpenAlex12İncele - MakaleAçık Erişim2024Scopus SJRQ2Multilocus sequence typing of L. bulgaricus and S. thermophilus strains from Turkish traditional yoghurts and characterisation of their techno-functional roles
Dikmen, Hilal; Goktas, Hamza; Demirbas, Fatmanur; Kayacan, Selma; Ispirli, Humeyra; Arici, Muhammet; Turker, Mustafa; Sagdic, Osman; Dertli, Enes
In this study, Streptococcus thermophilus and Lactobacillus bulgaricus strains from traditional Turkish yoghurts were isolated, identified by 16S rRNA sequencing and genotypically 14 S. thermophilus and 6 L. bulgaricus strains were obtained as distinct strains by MLST analysis. Lactic acid production levels of the L. bulgaricus strains were higher than S. thermophilus strains. HPLC analysis showed that EPS monosaccharide composition of the strains mainly consisted of glucose and galactose. In general, all strains were found to be susceptible for antibiotics, except some strains were resistance to gentamicin and kanamycin. Apart from two strains of S. thermophilus, all strains displayed strong auto-aggregation level greater than 95% at 24 h incubation. S. thermophilus strains showed higher cell surface hydrophobicity than L. bulgaricus strains. This study demonstrated the isolation, identification, genotypic discrimination and techno-functional features of wild type yoghurt starter cultures which can potentially find place in industrial applications.
AtıfScopus6WoS5OpenAlex6İncele - MakaleYayıncıda açık erişim2024Scopus SJRQ2Generalized strongly n-polynomial convex functions and related inequalities
Özcan, Serap; Kadakal, Mahir; İşcan, İmdat; Kadakal, Huriye
This paper focuses on introducing and examining the class of generalized strongly n-polynomial convex functions. Relationships between these functions and other types of convex functions are explored. The Hermite–Hadamard inequality is established for generalized strongly n-polynomial convex functions. Additionally, new integral inequalities of Hermite–Hadamard type are derived for this class of functions using the Hölder–İşcan integral inequality. The results obtained in this paper are compared with those known in the literature, demonstrating the superiority of the new results. Finally, some applications for special means are provided.
AtıfScopus5WoS5OpenAlex6İncele