Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Battal, Fetullah(10)
- Ayata, Ümit(8)
- Dertli, Enes(8)
- Kul, Murat(8)
- Kan, Muhammed Enes(7)
- Kaya, Yunus(7)
- Öztekin, Sebahat(7)
- Akeren, Zahide(6)
- Aydemir, Uğur(6)
- Bayraktar, Bülent(6)
- Korkmaz, Huseyin(6)
- Peker, Hüseyin(6)
- Aksakalli, Ayhan(5)
- Apak, Ömer Ceyhun(5)
- Banaz, Emrullah(5)
- Can, Zehra(5)
- Esmer, Yusuf(5)
- Hasar, Ugur Cem(5)
- Kutlu, Naciye(5)
- Sönmez Sari, Ebru(5)
- Sönmez Sarı, Ebru(5)
- Ulay, Göksel(5)
- Çolak, Murat(5)
- Ünlü, Hami(5)
- İspirli, Hümeyra(5)
- Aksan, Nurcan Demircan(4)
- Bayraktar, B.(4)
- Degirmenci, Yavuz(4)
- Doğan, Zeki(4)
- Ecem Bayram, Nesrin(4)
- Elmalı, Kübra(4)
- Iliev, Teodor(4)
- Kadakal, Mahir(4)
- Kalyoncuo, Servet(4)
- Semerci Çakmak, Vahide(4)
- Yayla, İbrahim Erdoğan(4)
- Zozik, Adalet(4)
- Öktem, Tuncay(4)
- Şenay, Volkan(4)
- Abdioglu, Murat(3)
Yayınlar
- MakaleYalnız künye2025Scopus SJRQ2Influence of ultrasonic-assisted deep eutectic solvent extraction on bioactive compounds from germinated mung beans (Vigna radiata) and greenness assessment
Yücel, Tuğçenur; Kamiloğlu, Aybike; Kutlu, Naciye
In this study, the ultrasonic-assisted method was applied to extract phenolic, flavonoid, and antioxidant compounds from germinated mung beans. In addition, deep eutectic solvents (DESs) were chosen as solvents to support the green concept and to increase their applicability. Choline chloride is a quaternary ammonium salt and was used as the hydrogen bond acceptor (HBA), and compounds from the alcohol, organic acid, sugar, and amide groups were combined as hydrogen bond donors (HBD) to obtain 8 different DESs. Higher yields were obtained with ultrasonic-assisted DESs compared to the traditional method (maceration) when total phenolic compound and antioxidant activities were evaluated. While the most effective solvent for total phenolic compound yield was choline chloride:fructose, the highest antioxidant activity values were obtained with solvents using organic acids as HBD. Moreover, Blue Applicability Grade Index (BAGI) was used to assess the greenness of the applied ultrasonic-assisted spectrophotometric extraction and DESs. As a result, using green technology and green solvents was influential in the extraction of bioactive compounds, and their applicability was especially effective for mung beans.
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İncele - BildiriAçık Erişim2025Scopus SJRQ4Lightweight Hybrid CNN Model for Face Presentation Attack Detection
Turhal, Uğur; Yilmaz, Asuman Günay; Nabiyev, Vasif; Mammadova, G.; Aliev, T.; Aida-zade, K.
Today, face recognition systems are widely used in many areas that require biometric-based verification, especially because they are contactless and require low user cooperation. Despite their ease of implementation, these systems are vulnerable to attacks. Especially the increasing use of social media, makes it easier to spoof face recognition systems. Therefore, it is very important to develop new methods for Face Presentation Attack (FPA) detection. In this study, FPA detection performances of the lightweight Convolutional Neural Network (CNN) models -MobileNetV3-Small, ShuffleNet, SqueezeNet- and lightweight hybrid CNN models designed with combinations of these networks were investigated. In the experiments, the change in FPA detection performance was examined by giving the cropped face regions and the whole images as input to the networks. Using the whole image instead of the cropped face region significantly improved the FPA detection performance of the CNN models. These results showed that non-facial areas carry important information in FPA detection. Also, the FPA detection performance of the proposed lightweight hybrid CNN models were better than the single use of the networks for both inputs. 0.17% HTER performance was achieved with the hybrid CNN model built from the combination of ShuffleNet + SqueezeNet on the Replay-Attack dataset.
- Derleme MakaleYalnız künye2025Scopus SJRQ3Artificial Intelligence and Environmental Impact: Moving Beyond Humanizing Vocabulary and Anthropocentrism
Karakaş, Ümit; Özdemir, Vural
Artificial intelligence (AI) and its applications in digital health, bioengineering, and society have significant material impacts on the environment owing to AI’s vast energy demands and energy consumption, carbon footprints, and water usage to cool data centers and generate electricity to power the data centers. Yet, the environmental footprints of AI remain underappreciated and inadequately acknowledged. This is significant, particularly in this era of climate emergency and ongoing threats to planetary energy and water supplies. The vocabulary attached to AI often aims to mimic positive human capacities such as “warmness” and “care.” However, these attempts to humanize AI and digital technology come with an anthropocentric gaze and blind spots that bracket out the environmental impacts and footprints of AI and privilege humans and technology over nonhuman animals and planetary ecological limits. In medicine, the environmental impacts of large language models range from water consumption and carbon emission to rare mineral usage. This commentary and innovation analysis question and queer the popular imagination of AI and digital technology as things that only exist in the immaterial world of cyberspace. In the course of research on AI in planetary health, we must be cognizant of its materiality, ecological impacts, and massive energy and water demands. We argue that moving away from anthropocentric narratives and vocabulary in AI design and praxis would bode well to live within planetary ecological limits so that AI and emerging digital technologies best serve robust and responsible science and all life on the planet Earth. Copyright 2025, Mary Ann Liebert, Inc., publishers.
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İncele - MakaleAçık Erişim2025Scopus SJRQ2Physicochemical properties, organic acid composition and free amino acid profiles in selected Cornus mas L. genotypes from the Çoruh Valley
ERDOĞAN, Ümmügülsüm; ERDOĞAN, Yaşar
Cornus mas L. (cornelian cherry) is a species widely used from traditional consumption to modern industrial applications due to its high nutritional content, richness in phenolic compounds, and functional food potential. This study aimed to comprehensively evaluate the physicochemical properties, organic acid composition, and free amino acid profiles of 15 cornelian cherry genotypes selected from the Çoruh Valley, one of Turkey's important biodiversity centers. Fruit samples were collected at full physiological maturity, and TSS, titratable acidity, pH, sugar composition, ascorbic acid, and tannin contents were analyzed using standard methods.Organic acids were determined by HPLC-UV, and free amino acids were determined by HPLC with OPA/FMOC derivatization. All measured traits differed significantly among genotypes (p < 0.05). Malic acid ranged from 38.12 to 251.34 mg/100 g, and total organic acids from 588.89 to 1038.15 mg/100 g. Free amino acid contents ranged from 71.34 to 93.14 mg/100 g, with the highest values in the G7 and G5 genotypes. This study demonstrates that the Çoruh Valley is an important hotspot of genetic diversity for cornelian cherry and contains genotype groups suitable for different uses. Overall, the findings provide a biochemical basis for selecting genotypes for breeding, nutritional applications, and industrial processing.
- MakaleAçık Erişim2025Scopus SJRQ1From screens to minds: the mediating role of psychological well-being between digital reading and AI anxiety
Özbilen, Uğur; Banaz, Emrullah; Şahin, Tuğrul Gökmen
Introduction: This study investigates the mediating role of psychological well-being in the relationship between digital reading disposition and artificial intelligence (AI) anxiety among Turkish teachers. Addressing the growing concern of technology-related anxiety in education, the research explores how digital literacy and psychological resilience interact within a single structural model. Methods: A correlational research design was employed with data collected from 324 teachers. Participants completed the Digital Reading Disposition Scale, the Psychological Well-Being Scale, and the Artificial Intelligence Anxiety Scale. Bootstrapped structural equation modeling (SEM) was used to test the measurement model and the hypothesized mediation effect. Prior to SEM analysis, confirmatory factor analysis (CFA) was conducted to establish construct validity of the scales. Results: Findings revealed that digital reading disposition was positively associated with psychological well-being and negatively linked with AI anxiety. Psychological well-being was also negatively related to AI anxiety. Moreover, psychological well-being partially mediated the relationship between digital reading disposition and AI anxiety. Discussion: The results suggest that teachers with stronger digital reading dispositions experience higher psychological well-being, which in turn buffers against AI-related anxiety. These findings contribute novel theoretical insights to educational literature by integrating digital reading, psychological well-being, and AI anxiety into a single model. Practically, the study underscores the importance of fostering digital literacy and psychological resilience to mitigate technology-related anxiety in educational settings.
AtıfWoS1OpenAlex2İncele - MakaleAçık Erişim2025Scopus SJRQ2Mind diet adherence associated with lower Zonulin levels in older Parkinson's patients
Esgin, Özge; Tokçaer Bora, Hatice Ayşe; Gülbahar, Özlem; Demirkesen, Özlem Cemile; Ataoğlu, Nigar Esra Erkoç; Söke, Fatih; Özçelik, Ayşe Özfer
Aim: This study investigates the association between adherence to the MIND diet and serum zonulin levels in older adults with Parkinson's disease (PD). Methods: Data were collected through structured survey forms and blood samples. The survey assessed general information, 24-hour food recalls, anthropometric measurements, the MIND diet adherence and physical activity levels. Zonulin levels were analysed from blood samples. Results: The study included 57 older adults with PD in stages 1–3 on the Hoehn & Yahr scale (29 women, 28 men; mean age 70.2 ± 4.6 years). Zonulin levels were negatively correlated with dietary total antioxidant capacity (p < 0.05). In adjusted analyses, higher adherence to the MIND diet was associated with lower zonulin levels (β = −0.25). Conclusions: These findings suggest a novel link between adherence to the MIND diet and reduced zonulin levels. MIND diet could have potential benefits for neurological function and intestinal barrier integrity.
- MakaleAçık Erişim2025Scopus SJRQ3Tailoring the optoelectronic properties of ZnO nanowires via TiO2 coating
Sarac, Mehmet Fahri; Mert, Merve; Solakyildirim, Tuba; Teber, Ahmet
The photosensing properties of TiO2/ZnO nanowires (NWs) were investigated by sequential deposition using thermal oxidation and sol–gel. It was found that TiO2/ZnO NWs with 5 mM concentration exhibit a higher aspect ratio compared to the 10 mM and 25 mM TiO2/ZnO NWs. The surface-to-volume ratio directly influences the photoluminescence (PL) intensity and electrical properties of the ZnO NWs. XPS confirmed the presence of TiO2 on the surface, while EDS detected titanium, with its concentration increasing as the TiO2 concentration rises. The photosensing performance of ZnO has been significantly improved by modifying it with TiO2. However, determining the optimum concentration is a critical factor in performance improvement. The findings show that high TiO2 concentrations improve surface properties, but excessive coating may limit carrier mobility. Photosensitivity has been increased at lower TiO2 concentration due to a higher surface-to-volume ratio (SVR) and, as a result, higher surface photoactivity. The 25 mM TiO2/ZnO NW array stands out in optimal detectability and photoresponsivity due to the reduced resistance caused by the increased Ti concentration on the surface. The 25 mM TiO2/ZnO NWs achieved the highest photoresponsivity (717 mA/W) and specific detectivity (1.48 × 101° Jones), while the 5 mM TiO2/ZnO NWs exhibited exceptional photosensitivity (320.11%), making them ideal for UV detection. The samples at varying concentrations show promise in photosensitivity, detectability, and photoresponsivity, making them suitable for environmental sensors, UV detectors, and other optoelectronic applications.
AtıfOpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ1ChatGPT in Early Childhood Science Education: Can It Offer Innovative Effective Solutions to Overcome Challenges?
Uğraş, Mustafa; Çakır, Zehra; Zacharis, Georgios; Kalogiannakis, Michail
This study explores the potential of ChatGPT to address challenges in Early Childhood Science Education (ECSE) from the perspective of educators. A qualitative case study was conducted with 33 Early Childhood Education (ECE) teachers in Türkiye, using semi-structured interviews. Data were analyzed through content analysis with MAXQDA 24 software. The results indicate that ECE teachers perceive ChatGPT as a partial solution to the scarcity of educational resources, appreciating its ability to propose alternative material uses and creative activity ideas. Participants also recognized its potential to support differentiated instruction by suggesting activities tailored to children’s developmental needs. Furthermore, ChatGPT was seen as a useful tool for generating lesson plans and activity options, although concerns were expressed that overreliance on the tool might undermine teachers’ pedagogical skills. Additional limitations highlighted include dependence on technology, restricted access to digital tools, diminished interpersonal interactions, risks of misinformation, and ethical concerns. Overall, while educators acknowledged ChatGPT’s usefulness in supporting ECSE, they emphasized that its integration into teaching practice should be cautious and balanced, considering both its educational benefits and its limitations.
AtıfScopus7WoS2OpenAlex8İncele - MakaleAçık Erişim2025Scopus SJRQ1Characterization and immune-modulatory roles of branched glucan and acetylated gluco-oligosaccharides produced by glucansucrase 40 from Leuconostoc mesenteroides YTU 40
Dere, Sevda; İspirli, Hümeyra; Korkmaz, Kader; Tuncil, Yunus Emre; Sagdic, Osman; Narbad, Arjan; Ayyash, Mutamed; Dertli, Enes
Glucansucrases (GS) are functional enzymes for the production of distinct glucan and gluco-oligosaccharide structures with potential bioactive characteristics. In this study, an active glucansucrase (GS40) was identified within the genome of Leuconostoc mesenteroides YTU 40 that was further cloned, heterologously expressed and biochemically characterised. GS40 was capable of production of a branched dextran with ~ 20% (1→3)-α-D-Glc residues detected by1H and13C NMR analysis. Acceptor reactions of GS40 with maltose and cellobiose were performed and distinct maltose/cellobiose derivative acetylated gluco-oligosaccharides were produced detected by TLC, NMR and LC-MS analysis. The bioactive characteristics of branched dextran and gluco-oligosaccharides were tested by determination of their immune-modulatory roles in terms of triggering IL-12, IL-10, IL-4 and TNF-α cytokine levels. These findings can be important to unveil the role of glucansucrases for the production of gluco-oligosaccharides that can be used as functional ingredients for food and other industries.
AtıfScopus3WoS3OpenAlex3İncele - MakaleAçık Erişim2025Scopus SJRQ2The role of NiO in isotype heterojunction photodiodes
Sevgili, Ömer; Orak, İkram; Özel, Sultan Süleyman; Özel, Faruk
This study presents a structural analysis of NiO and the fabrication of Al/NiO/p-Si isotype heterojunction photodiode (PD) as well as an investigation of the photo-response and photovoltaic (PV) properties of the PD in the various illumination intensities. The series resistance (RS) value of the Al/NiO/p-Si was calculated to be 0.11 kΩ using Ohm’s Law at 2 V. This result corroborates the assertion that RS is the pivotal parameter for attaining optimal performance in a PD. The NiO has made a notable improvement to the electrical parameters such as ideality factor, barrier height, and series resistance. The spectral responsivity R value of the PD was calculated as 1.59 A W−1 at −2 V. The Al/NiO/p-Si exhibited a short-circuit current density (JSC) of 60.38 mA·cm−2, an open-circuit voltage (VOC) of 149.0 mV, a fill factor (FF) of 27.67%, and a power conversion efficiency (PCE) of 2.49%. In view of the experimental results, it can be concluded that NiO represents a promising material for the optimization of heterojunction photodiode applications.
- MakaleAçık Erişim2025Scopus SJRQ1The relationship between emotional intelligence levels, stress management skills and hormonal and cerebral responses in university students
Bayraktar, Bülent; Battal, Fetullah
Background: Emotional intelligence is a person’s ability, capacity and ability to understand, use, understand, manage, anticipate, manage and direct the emotions of oneself or others. Students with high levels of emotional intelligence express themselves better, are more resistant to stress in their lives, and are individuals who can direct their emotions. Leaders with strong emotional intelligence will create synergy for all employees. Therefore, emotional intelligence and stress management skills are important issues in the field of leadership and organizational behavior. At the same time, emotional intelligence and stress management skills interact with hormones. This study aims to examine the emotional intelligence levels and hormone (apelin, cortisol) and cerebral (Brain-derived neurotrophic factor (BDNF)) response of 4th-year students of the faculty of health sciences at the university, who are potential managers of the future in terms of some variables. Methods: The research was conducted using the cross-sectional data method with 167 university students aged 18–24 who were reported to be clinically healthy in Türkiye. Apelin, cortisol hormone and BDNF levels in the participants’ saliva samples were analyzed using the ELISA technique. The relationship between emotional intelligence level and total scores from the stress coping scale and salivary apelin, cortisol and BDNF levels were evaluated. Results: In the study, it was determined that the average level of apelin hormone in saliva was “2.36 ± 0.076)’’ ng/mL in girls and “2.57 ± 0.071’’ ng/mL in boys. In girls, the BDNF level was “3.19 ± 0.97’’ and the cortisol level was “2.04 ± 0.72’’. BDNF level in boys is “3.41 ± 0.94’’and cortisol level is “1.92 ± 0.59’’. There is a significant difference between the participants’ allowances (income levels) and the average levels of salivary apelin hormone, BDNF and emotional intelligence scale (p < 0.01). A positive, strong and statistically significant relationship was found between the participants’ emotional intelligence level and stress management skills and apelin and BDNF levels, and a negative, strong and statistically significant relationship was found between salivary cortisol levels (p˂0.01). Conclusions: High emotional intelligence and stress management skills are an important element of strategic importance for a successful management and professional success process in individuals who will work in fields that need people such as health, marketing, law, consultancy, medicine, teaching and the service sector. Our study determined that as university students’ emotional intelligence levels strengthened, the participants’ stress management skills, salivary apelin, and BDNF levels increased, and cortisol hormone levels decreased. As a result, monitoring and examining apelin, BDNF, cortisol hormones can be useful parameters in evaluating the interaction between individuals’ emotional intelligence level and stress management skills and hormone response.
AtıfScopus3WoS3OpenAlex5İncele - MakaleAçık Erişim2025Scopus SJRQ1Understanding the moderating role of gender in physical activity enjoyment and mental well-being: evidence from university students’ campus recreation participation
Karakullukcu, Omur Fatih; Ayhan, Cihan; Guder, Ferhat; Talaghir, Laurentiu-Gabriel; Cosoreanu, Dumitru Marius; Bentea, Cristina Corina
Background: Participation in physical activity is considered an important factor not only for individuals’ physical health but also for their psychological well-being. Developing physical activity habits, especially among university-aged individuals, plays a critical role in long-term health outcomes. In this context, the impact of physical activity enjoyment on individuals’ mental well-being has become a topic of interest. However, the moderating role of individual differences, particularly gender, in this relationship has not yet been sufficiently clarified. The purpose of this study was to examine the relationship between physical activity enjoyment and mental well-being among university students and to reveal the moderating effect of gender on this relationship. Method: The research was conducted using a relational screening model. The study group consisted of 392 university students (261 male and 131 female; mean age = 22.95 ± 2.58) from Sakarya University of Applied Sciences who participated in campus recreation activities. Data were collected via a face-to-face survey using the Physical Activity Enjoyment Scale and the Mental Well-being Scale. Descriptive statistics, Pearson correlation analysis, and regression-based moderation analysis using PROCESS Macro Model 1 were used in the statistical analysis. Results: The level of enjoyment of physical activity was found to have a significant positive effect on mental well-being (r = 0.427, p = 0.001; F = 50.388, p < 0.001; R2 = 0.280). Moderation analysis further showed that gender significantly moderated this relationship (ΔR2 = 0.049; p < 0.001). The effect of enjoyment on mental well-being was significant for both males (β = 0.2693; S.E. = 0.0348; p < 0.001; 95% CI [0.2010, 0.3377]) and females (β = 0.7913; S.E. = 0.0949; p < 0.001; 95% CI [0.6047, 0.9780]), with the effect being stronger among females. Conclusion: The findings show that considering gender-sensitive approaches in physical activity programs to be implemented on university campuses has a potential impact on improving the psychological well-being of students.
AtıfScopus2WoS2OpenAlex3İncele - MakaleAçık Erişim2025Scopus SJRQ3Measuring the Effectiveness of Post-Earthquake Social Policies Using the Intuitionistic Fuzzy SIWEC Method: The Case of the February 6 Kahramanmaraş Earthquakes; [Sezgisel Bulanık SIWEC Yöntemi Kullanılarak Deprem Sonrası Sosyal Politikaların Etkinliğinin Ölçülmesi: 6 Şubat Kahramanmaraş Depremleri Örneği]
Keskin, Abdurrahman; Kara, Mehmet Akif; Keskin, Abdulkadir; Besoluk, Erdal
This study aims to evaluate the effectiveness of social policies implemented in the aftermath of the February 6, 2023, Kahramanmaraş earthquakes. The research employed the Intuitionistic Fuzzy SIWEC technique, a multi-criteria decision making method. Eight experts with substantial field experience evaluated seven main criteria and forty-four sub-criteria. The findings indicate that social policies—particularly in the "food and basic needs" category (covering clean drinking water, hygiene products, the food supply chain, food safety, and the provision of special nutritional needs) and, more broadly, policies within the "health and education services" category—have been implemented successfully. In contrast, under the "employment and social security" category, efforts to combat informality, provide vocational training, grant tax exemptions, and support SMEs were deemed inadequate. Similarly, within the "basic infrastructure and public services" category, notable deficiencies were identified in urban planning and construction, in ensuring transparency and fairness in public social policies, and in restoring telecommunication and internet infrastructure. In addition policies targeting vulnerable groups and psychosocial support services were found to be relatively neglected.
AtıfOpenAlex1
İncele - MakaleYalnız künye2025Scopus SJRQ2Parental acceptance of children with developmental disabilities in the preschool period: the role of mindfulness in parenting
Ari-Arat, Ceren; Cetinkaya, Elif; Oz, Koray
Objectives: Understanding the factors that influence parental acceptance during the preschool period when many children with developmental disabilities are diagnosed is crucial. Mindfulness in parenting is the intentional, nonjudgmental attention a person gives to their child and their parenting actions and is associated with processes of acceptance. This research examines the relationship between parental acceptance and mindfulness in parenting among parents of preschool children with developmental disabilities. Methods: The investigation included 120 parents of preschool-aged children (3–6 years) with developmental disabilities in Turkey. Results: The findings reveal that parental acceptance of children with developmental disabilities varies according to the father’s education level and the child’s age. A significant correlation was found between mindfulness in parenting and parental acceptance. Notably, mindfulness in parenting accounted for approximately 19.2% of the variance in parental acceptance of children with developmental disabilities (R2 = 0.192). Conclusions: The results underscore the importance of interventions aimed at enhancing mindfulness in parenting, particularly in supporting the acceptance processes during the preschool years. This is especially critical for younger children and for fathers with lower educational levels. The study also highlights the need for further research to deepen our understanding of the acceptance process.
- MakaleAçık Erişim2025Scopus SJRQ1The prebiotic potential of alternansucrase-based glucooligosaccharides: the effects on short-chain fatty acids production and microbiome diversity
Ozulku, Gorkem; Harris, Hannah C.; Savva, George M.; Ahn-Jarvis, Jennifer H.; İspirli, Hümeyra; Dertli, Enes; Warren, Frederick J.
Glucooligosaccharides (GLOS) produced by glucansucrases via acceptor reactions are oligosaccharides that transit upper intestinal tract and evade digestion and may be considered to be a prebiotic. The prebiotic function of GLOS can be dictated by the type of acceptor sugar used during its production. Therefore, the prebiotic effect on the gut microbiome and short chain fatty acids (SCFAs) production can be used to inform the selection of acceptor sugars. In this study, alternansucrase-based GLOS derived from different acceptor sugars (melibiose, cellobiose and lactose) and inulin (positive control) were investigated using in vitro colon model fermentation to examine their prebiotic effect and SCFAs production. Microbiome composition was determined using shotgun metagenomics. SCFAs and lactate formation was determined using 1H NMR spectroscopy. Fusicatenibacter saccharivorans and Bacteroides uniformis appeared to increase in abundance after 24 h following fermentation of all three GLOS. The highest abundance for Bifidobacterium longum was seen after supplementation with lactose derived GLOS. Fermentation of GLOS appeared to produce around twice as much acetate than fermentation with inulin, while similar amounts of other SCFAs and lactate were produced. Melibiose derived GLOS supplementation in healthy 3 donors increased F. saccharivorans while inulin supplementation promoted Lactobacillales in order level. This study suggests that there may be beneficial effects of GLOS's on gut microbiome composition and metabolite composition, relative to the effects seen for inulin.
AtıfScopus1OpenAlex1İncele - MakaleYalnız künye2025Scopus SJRQ1Optimization of surface modification parameters of fly ash with high calcium oxide (CaO) content to use as a filling material
Uçurum, Metin; Özdemir, Akın; Teke, Çağatay
Fly ash (FA) is the fine-grained waste product obtained by burning coal after being ground to specific sizes in thermal power plants, carried with flue gases, and kept in cyclones or electro-filters. Like every industrial waste, the possibilities of utilizing FA have been investigated, and it can be utilized as an additive in cement and concrete. Despite this, industrial waste, which increases daily in the world, brings many problems, especially environmental problems. For this reason, alternative usage areas of the waste in question are constantly being investigated. In this paper, FA containing approximately 50 % CaO from Afşin-Elbistan, Turkiye was processed with stearic acid in a planetary mill to be used as a filling material in industrial products, and it has a grain size of 68.10 μm on a d50 basis, a specific surface area (SSA) of 176.40 m2/g and a contact angle of 13.89. An optimization and characterization study was conducted to make the hydrophilic surface structure hydrophobic by mechanochemical surface modification. Also, surface modification parameters, such as operational speed (rpm), ball filling ratio (%), FA filling ratio (%), pulp density, stearic acid dosage (% of FA), and modification time (min.) were optimized with the D-optimal experimental design. Based on the optimum surface modification parameters, a coated fly ash (CFA) product was obtained with an active ratio of 99.70 %, a contact angle of 95.06o, a medium size (d50) size of 10.60 μm, and an SSA of 926.90 m2/g.
AtıfScopus8WoS8OpenAlex9İncele - MakaleAçık Erişim2025Scopus SJRQ1Lightweight ASIP Design for Lattice-Based Post-quantum Cryptography Algorithms
Akçay, Latif; Yalçın, Berna Örs
Lattice-based cryptography (LBC) algorithms are considered suitable candidates for post-quantum cryptography (PQC), as they dominate the standardization process put forward by the National Institute of Standards and Technology (NIST). Indeed, three of the four key encapsulation mechanism (KEM) algorithms in the third round of the process are based on computationally hard lattice problems. On the other hand, there is an urgent need for processor designs that can run PQC algorithms efficiently, especially for embedded systems. This study presents an application-specific instruction set processor (ASIP) design for the Kyber, Saber, and NewHope algorithms based on transport triggered architecture (TTA). Custom hardware accelerators are added to the baseline processor architecture for computation-intensive steps without applying any software optimization to the reference code. We compared FPGA and ASIC implementations of our design with the prominent RISC-V cores and instruction set extension studies in the literature. According to the results, the proposed design offers greater efficiency, better performance, and lower resource utilization than its competitors in most cases.
AtıfScopus14WoS7OpenAlex17İncele - MakaleYalnız künye2025Scopus SJRQ1A psychometric analysis of the artificial intelligence skills scale developed through chat gpt
Görgülü, Deniz; Coşkun, Fatma; Demi̇r, Mustafa; Si̇pahi̇oğlu, Mete
This study aims to examine the psychometric properties of a scale developed to measure teachers’ ability to use artificial intelligence tools in education. The scale was originally proposed as having 33 items across 5 sub-dimensions by Chat GPT-4, an AI system. To establish content validity, the scale form was submitted to expert review. An exploratory factor analysis (EFA) was then conducted on a sample of 347 teachers to determine if the 33-item, 5-subdimensional structure proposed by Chat GPT was confirmed by empirical data. The EFA results supported Chat GPT-4’s proposed structure. A confirmatory factor analysis (CFA) was applied to a new sample of 603 teachers to assess the scale’s validity in an independent sample. The CFA results did not fully support the structure consisting of 33 items and 5 subdimensions proposed by Chat GPT. Reliability was analyzed using Cronbach’s Alpha and test-retest methods.
AtıfScopus5WoS5OpenAlex10İncele - MakaleYalnız künye2025Scopus SJRQ2Theoretical and experimental studies on a novel potential barrier control for a vehicle model and piezoelectric smart structure
Uyar, M.
A novel control methodology, inspired by the quantum mechanical phenomenon of particle-wave duality, wherein particles and waves utilize their energy to traverse potential barriers, has been proposed. This control strategy is investigated both numerically and experimentally to mitigate undesirable vibrations in a three-degree-of-freedom vehicle system and a smart beam structure. The mathematical framework for the vehicle system is derived using Lagrange’s equations, while the experimental setup is designed for the smart beam. Disturbance inputs in the form of step and sinusoidal road profiles are introduced into the vehicle model to simulate real-world conditions. For the smart beam, endpoint vibrations are induced as an initial value problem by releasing the beam’s endpoint from a predefined initial displacement. In order to achieve vibration suppression, control signals, parameterized based on system-specific frequency and period characteristics, are applied to both systems. The optimal control parameters are determined by evaluating the vibration damping performance. The findings of this study demonstrate that the proposed control strategy is not only effectively applicable to the experimental validation of the piezoelectric smart structure but also holds significant potential for numerical integration into mechanical systems, such as vehicle dynamics models.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ1Preservice teachers’ attitudes toward pedagogical humour: the role of physical activity, sociodemographic factors, and academic discipline
Çakır, Zekai; Çatıkkaş, Fatih; Türkmen, Mutlu; Şengönül, Abdullah; Yaman, Menzure Sibel; Öktem, Tuncay; Gönen, Mevlüt; Güzel, Sema; Yel, Kader
Background: Humour in educational contexts is not merely an element of entertainment but a powerful pedagogical tool that reduces anxiety, enhances motivation, strengthens classroom climate, and facilitates learning. While affiliative and anxiety-reducing functions of humour foster social bonds, it is well documented that hostile or aggressive humour can undermine students’ self-concept. For this reason, humour must be employed with careful consideration in pedagogical settings. Although recent research has increasingly examined the associations between humour, psychological resilience, cognitive flexibility, and social interaction, studies evaluating preservice teachers’ humour attitudes concerning lifestyle factors (e.g., physical activity) and socio-demographic variables remain limited. The present study seeks to address this gap by situating the multidimensional nature of humour at the intersection of pedagogy, lifestyle, and cultural context. Methods: The study, conducted within a cross-sectional survey design, included 766 preservice teachers (397 male, 369 female) enrolled at various universities in Turkey during the 2023–2024 academic year. Participants were classified as physically active or inactive based on WHO and ACSM criteria. The Attitude Scale Toward the Use of Humour in Education (ASTUHE) was employed as the data collection instrument. The scale consists of 17 items grouped into three subscales: PHNE (Perceiving Humour as Necessary in Education), ELI (Effect on Language and Instruction), and CCM (Contribution to Classroom Management). In Balta’s (2016) original study, internal consistency was reported as α = 0.89, whereas in the present research, internal consistency was α = 0.887. For the analyses, independent-samples t-tests, one-way ANOVA, and post-hoc tests (LSD, Tukey HSD, Bonferroni) were conducted, with effect sizes (Cohen’s d, η², ηp²) also reported. Results: Preservice teachers generally evaluated humour as a positive element in education. Students who engaged in regular physical activity reported significantly higher attitude scores than their inactive peers (M = 3.51 vs. 2.86; p <.001, d = 0.62). Female students exhibited more favourable attitudes than males (p <.05, d = 0.61–0.98). Likewise, students involved in team sports demonstrated significantly higher scores than those engaged in individual sports (p <.001, d = 0.60–0.96). Differences were also observed across academic discipline, class level, family humour climate, income level, and place of upbringing (p <.05, ηp² = 0.015–0.027). In particular, students raised in urban centres evaluated the functions of humour in education more positively, likely due to their exposure to broader cultural and social stimuli. These findings underscore that humour is not merely a pedagogical skill but a multidimensional phenomenon shaped by lifestyle, social environment, and cultural factors. Conclusions: Regarding contribution to the literature, the study illuminates the relationship between humour and lifestyle factors, while simultaneously revealing the multilayered structure of humour through the combined examination of diverse socio-demographic variables. Moreover, the positive (affiliative, supportive) and negative (sarcastic, aggressive) aspects of humour are contextualised and discussed in light of the literature. Although the cross-sectional design and reliance on self-report data limit causal inference, the findings suggest that preservice teachers’ humour awareness and the availability of physical activity opportunities in university settings may enhance pedagogical skills and psychosocial resilience. Future longitudinal and experimental research could more clearly elucidate the causal mechanisms linking humour and lifestyle factors.
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