Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Dertli, Enes(117)
- Kaya, Yunus(51)
- Şahin, Engin(48)
- İspirli, Hümeyra(47)
- Özen, Soner(46)
- Şenay, Volkan(45)
- Pat, Suat(44)
- Can, Zehra(39)
- Bayraktar, Bülent(37)
- Bayram, Sinan(37)
- Korkmaz, Şadan(36)
- Cuce, Erdem(35)
- Ecem Bayram, Nesrin(33)
- Kutlu, Naciye(33)
- Yilmaz, Mustafa Tahsin(32)
- Artar, Musa(31)
- Ertugrul, Mehmet(30)
- Öner, Erdal(30)
- Ayata, Ümit(29)
- Hasar, Ugur Cem(29)
- Esmer, Yusuf(28)
- Mercan, Emin(27)
- Cuce, Pinar Mert(26)
- Özdemir, Akın(25)
- Çolak, Murat(24)
- Bayram, Ozkan(23)
- Kamiloğlu, Aybike(23)
- Sert, Durmuş(22)
- Ayazoglu, Rabil(21)
- Abdioglu, Murat(20)
- Bayram, Nesrin Ecem(20)
- Kadakal, Mahir(20)
- Kara, Yakup(20)
- Kizil, Hamit Emre(20)
- Tozlu, Alperen(20)
- Birinci, Ahmet(19)
- Gerçek, Yusuf Can(19)
- Battal, Fetullah(18)
- Dirican, Ebubekir(18)
- Ergün, Mustafa(18)
Yayınlar
- MakaleAçık Erişim2026Scopus SJRQ1Optimizing Budget Allocation for Digital Health Investments Using Metaheuristic Algorithms: A Cost–Impact Analysis for Public Health Systems
Dayi, Faruk; Erdogdu, Aylin; Esmer, Yusuf; Yildiz, Ferah; Ganji, Farshad
Background: In the era of digital transformation, public health systems increasingly rely on digital technologies to improve accessibility, efficiency, and patient outcomes. However, policymakers face significant challenges in allocating limited resources across competing digital health investments characterized by uncertainty and dynamic impacts. Methods: This study introduces the Adaptive Impact–Cost Optimization Theory (AICOT), a hybrid framework integrating fuzzy logic and genetic algorithms to optimize digital health investment portfolios. The model defines the Investment Priority Score (IPS) as a function of cost, expected impact, and implementation feasibility, enabling structured evaluation under uncertainty. A fuzzy inference system with centroid-based defuzzification is used to convert qualitative assessments into quantitative scores, while optimization techniques identify optimal portfolios across different fiscal scenarios. The empirical analysis covers 15 OECD countries (2018–2024) using publicly available datasets. Sensitivity analyses assess robustness under inflation, cost shocks, and changing system priorities. Results: The findings show that blended investment strategies combining routine digital health tools with pandemic-oriented infrastructures yield the highest resilience-adjusted efficiency. Results remain stable across sensitivity scenarios, with pandemic surveillance consistently ranking as a top priority even under increased cost conditions. The model effectively captures cross-country heterogeneity, demonstrating adaptability to different levels of digital maturity. Conclusions: AICOT provides a transparent and policy-relevant decision-support framework that improves resource allocation efficiency and reduces unnecessary expenditures. These contributions support long-term financial sustainability and align with global health objectives, including Universal Health Coverage and Sustainable Development Goal 3 (Good Health and Well-being).
AtıfScopus1WoS1OpenAlex1
İncele - MakaleYalnız künye2026Scopus SJRQ1Multidimensional characterization of graphite anode degradation in used lithium-ion batteries under real-life conditions
Temur, Hakan; Kara, Adem
The degradation of graphite anodes in lithium-ion batteries remains a critical barrier to extending cycle life and enabling efficient recycling. This study employs a multi-technique approach combining XRD, FTIR, SEM-EDS, ICP-MS, and XPS to investigate degradation mechanisms in graphite anodes recovered from commercial spent mobile phone batteries. While unused reference anodes show no significant degradation, spent anodes exhibit surface cracks, porous networks, heterogeneous SEI growth, and pronounced oxygen/fluorine accumulation. FTIR and XRD confirm increased LiF and Li2CO3 formation, indicating electrolyte decomposition and structural breakdown. ICP-MS reveals transition metal migration (Co, Ni, Mn) and current collector corrosion (Cu, Al), which correlate with degradation severity. Surface-sensitive XPS analysis further resolves a progressive degradation pathway: from limited SEI formation in low-degradation samples, through concurrent corrosion and metal crossover in medium-degradation samples, to extensive LiF-rich SEI accumulation in the most degraded samples. These findings are consistent with a self-accelerating chain-reaction mechanism wherein electrolyte decomposition, metal migration, and corrosion synergistically accelerate capacity fade. This study proposes a mechanistic framework for understanding heterogeneous degradation in real-world spent batteries and offers a practical, multi-technique diagnostic tool for recycling and second-life applications.
- MakaleAçık Erişim2026Scopus SJRQ2Machine Learning-Based Material Thickness and Type Classification via Scattering Parameters
Engin, Mustafa Alptekin; Cakir, Mehmet
The precise determination of material type and thickness is of major significance in non-destructive testing, quality assurance, and materials science, as it influences the functionality, reliability, and performance of materials in engineering applications. This study proposes a methodology for the classification of material thickness and type through the analysis of scattering parameters within the 8–12 GHz frequency range. A database was created, encompassing real, imaginary, and dB values of reflection and transmission parameters for nine real-world materials with thicknesses ranging from 1 to 10 mm. This study addressed two main classification tasks, namely material thickness and material type. A variety of training–testing splits were employed in conjunction with 10-fold cross-validation to facilitate a comparison of classifier performance. In the material type classification, incorporating multiple thickness levels of each material enabled the model to distinguish materials with similar reflection characteristics more accurately, thereby enhancing discrimination performance. The results showed that Fine KNN consistently achieved 100% accuracy in thickness classification, while Quadratic SVM achieved 100% accuracy in material type classification, even when utilising only three thickness levels. Furthermore, the 90% training–10% testing split yielded the highest performance in thickness classification, whereas the optimal data split for material type classification differed across classifiers. Overall, this study demonstrates that the combination of scattering parameters and machine learning serves as a reliable and efficient approach for non-destructive material characterization.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2026Scopus SJRQ1Permittivity Extraction of Electrically Thin Samples by Reflection-Only Free-Space Measurements
Hasar, Ugur C.; Xue, Bing; Ozturk, Hamdullah; Kaya, Yunus; Ozturk, Gokhan
A permittivity extraction procedure is devised for electrically thin samples from reflection-only free-space measurements. Unlike previous studies, this procedure relies on sample-back metal termination measurements especially useful for thinner samples. An objective function independent of antenna transmission characteristics and reference plane position is derived. Minimum and maximum thickness and permittivity values for which our method is applicable are also examined. Free-space measurements at X-band (8.2-12.4 GHz) of a Rogers 4350B sample (approx 1.52 mm) and a FR4 sample (1.60 mm) were performed to validate our method with a dielectric constant less than 5% variation.
AtıfScopus1WoS1İncele - MakaleAçık Erişim2026Scopus SJRQ1A comprehensive parametric study of contact behavior in functionally graded bilayer systems
Öner, Erdal; Artar, Pınar Tuğçe
An extensive body of research in contact mechanics has been conducted due to its broad relevance to numerous engineering systems of practical interest. The investigation of contact behavior in deformable bodies represents a major challenge in engineering, as it plays a crucial role in the performance of structural and mechanical systems. Due to its importance, the field has received considerable attention in the literature. The present study focuses on analyzing the contact problem of a two-layered system composed of a functionally graded orthotropic layer (FGOL) and a functionally graded isotropic layer (FGIL). The layered system is fully bonded to a rigid substrate (RS), and frictional effects are neglected. No bonding is assumed between the two layers. The system is subjected to loading through a flat-ended rigid indenter (FERI), and the body forces of both layers are incorporated into the formulation. In the solution of the contact problem, the condition of constant vertical displacement (and thus its zero derivative) under the FERI is defined as the boundary condition; it is subsequently reduced to a singular integral equation through the application of Fourier integral transform techniques. This integral equation is subsequently solved numerically by applying the Gauss–Chebyshev integration formula. A comprehensive parametric study is conducted with respect to different material configurations and various dimensionless parameters, providing detailed insight into the mechanical response of the functionally graded layered system.
- MakaleAçık Erişim2026Scopus SJRQ1Secondary school students’ reading culture and ıts role in critical reading self-efficacy perceptions
Maden, Aslı; Maden, Sedat; Önal, Aydın
Background: This study examines the relationship between secondary school students' reading culture and their critical reading self-efficacy (CRSE), addressing a gap in the literature on affective factors associated with critical literacy. Understanding this relationship is crucial for promoting sustainable reading practices and fostering critical engagement among adolescents. Methods: A correlational survey design was employed with 214 secondary school students (ages 11–14) from public schools in Türkiye. Data were collected using the Critical Reading Self-Efficacy Scale (19 items, four subdimensions) and the Reading Culture Scale (30 items, multidimensional). Reliability coefficients were satisfactory (α =.80 and α =.89, respectively). After confirming normality assumptions, Pearson correlation and multiple regression analyses were conducted to examine the relationships between variables. Results: Students' mean CRSE scores were above average, while their reading culture levels were moderate. CRSE did not differ significantly by grade level or gender, whereas reading culture levels were higher among Grade 8 students compared to Grade 7. A strong positive correlation was found between CRSE and reading culture (r ≈.63, p <.001). Multiple regression analysis revealed that reading culture was significantly associated with CRSE, accounting for 39% of the variance. Among the subdimensions, personal development and reading relations and basic reading skills were significantly associated with CRSE, whereas visual reading and book selection were not (p >.05). Conclusions: The findings demonstrate a significant relationship between students' reading culture and their CRSE. These results suggest that students with higher levels of reading culture tend to report higher levels of critical reading self-efficacy. Educational programs may benefit from considering activities related to the difficulty and research dimensions of CRSE. Future studies are recommended to examine these relationships across diverse populations using longitudinal or experimental designs.
AtıfOpenAlex1İncele - Kitap BölümüAçık Erişim2026Scopus SJRQ4Turkish Students’ Use of NotebookLM in an Online Digital Literacy Course
Kayali, Bünyami; Yavuz, Mehmet
This experimental study investigates the effects of using NotebookLM on students’ academic achievement and students’ assessment of NotebookLM in online digital literacy courses in higher education. It was conducted using an explanatory sequential mixed-methods design. A one-group pretest–posttest model was employed. During a five-week intervention, 33 Turkish students used NotebookLM for summarizing, concept mapping, and scenario-based problem-solving activities. Data was collected from a pretest, posttest, and interviews. Quantitative data was projected into SPSS 27 for analysis, and qualitative data was thematically analysed. Results reveal a significant difference between the pretest score (M = 66.90, SD = 10.26) and posttest score (M = 74.90, SD = 13.16) in terms of academic achievement, t(32) = −3.51, p = 0.001. The effect size was moderate (Cohen’s d = 0.68). Interview data shows that the students perceived NotebookLM as helpful for comprehension, time efficiency, motivation, and feedback, though constrained by language support and occasional technical problems. The findings suggest implications for using NotebookLM in online courses in higher education in Turkey.
- MakaleAçık Erişim2026Scopus SJRQ2Recitation Mode Is Associated With Salivary CREB and Cortisol Responses during Qur'anic Recitation
Okur, Süheyb; Topyay, Yusuf; Bayraktar, Bülent
Background: Spiritual practices such as Qur'anic recitation are commonly associated with psychological and physiological regulation; however, their salivary biomarker correlates remain insufficiently understood. This exploratory study examined whether different modes of Qur'anic recitation were associated with changes in salivary cAMP response element-binding protein (CREB), a biomarker related to plasticity-associated pathways, and cortisol, a marker of hypothalamic-pituitary-adrenal axis activity. Methods: The sample comprised three nonrandomized, criterion-defined conditions: Passive Control (n = 20; participants unable to read Qur'anic Arabic), Sight-Reading (n = 30), and Memorized Recitation (n = 30). Saliva samples were collected immediately before and after the experimental task or passive rest period. Salivary CREB and cortisol concentrations were quantified using ELISA. Post-task CREB levels were analyzed using ANCOVA with baseline CREB as a covariate. Cortisol responses were analyzed using change scores, Welch's ANOVA, and an additional robust factorial model with HC3 heteroscedasticity-consistent standard errors to evaluate exploratory Condition × Gender patterns. Results: After controlling for baseline CREB levels, experimental condition had a significant effect on post-task salivary CREB, F(2, 76) = 8.16, p < 0.001, η2p = 0.18. Memorized recitation showed higher adjusted post-task CREB levels than both sight-reading and passive control conditions. Cortisol change scores also differed significantly across conditions, Welch's F(2, 40.02) = 30.76, p < 0.001. Both active recitation conditions were associated with cortisol reduction relative to passive rest, with no significant difference between sight-reading and memorized recitation. Although descriptive data suggested a possible gender-related divergence in the memorized recitation condition, the Condition × Gender interaction did not remain statistically significant under robust estimation and was therefore interpreted as exploratory. Conclusion: These preliminary findings suggest that Qur'anic recitation modes are associated with distinct salivary biomarker patterns. Memorized recitation was linked to higher adjusted salivary CREB levels, whereas both active recitation modes were associated with cortisol attenuation relative to passive rest. Because the present design did not include active non-Qur'anic vocalization or neutral reading control conditions, the specificity of these effects to Qur'anic content cannot be determined. Future studies should include active control conditions and larger gender-stratified samples to clarify the mechanisms underlying these biomarker responses.
AtıfWoS1OpenAlex1İncele - MakaleYalnız künye2026Scopus SJRQ2DRAWING THE BIG PICTURE OF OPEN EDUCATION: A COMPARATIVE BIBLIOMETRIC ANALYSIS
Aksoy, Dilara Arzugul
This paper aims to provide a comprehensive overview of research on open education through bibliometric analysis. English-language articles published between 1955 and 2024 in the Scopus and Web of Science databases were selected for analysis. A variety of analytical techniques were employed, including descriptive analysis, co-authorship analysis, co-occurrence analysis, and citation analysis. The findings of this study indicated that research on open education steadily increased until 2020, after which it began to decline. The study also revealed that open education research is conducted globally, though it is predominantly concentrated in countries such as the United States and the United Kingdom. Furthermore, the majority of research in open education focuses on massive open online courses, followed by open educational resources. The International Review of Research in Open and Distributed Learning was identified as the journal with the highest number of open education articles across both databases. The research findings discussed in detail, and suggestions for future research are provided. This study offers an overview of open education research, assesses the current state of the field, and provides guidance for future investigations.
- MakaleAçık Erişim2026Scopus SJRQ3Mindfulness-Acceptance-Commitment Intervention Effects on Athletic Performance, Passion, and Psychological Well-being in Competitive Tennis Players: A Randomized Controlled Trial
Abidi, Wafa; Fall, Estelle; Chalghaf, Nasr; Ceylan, Halil İbrahim; Muntean, Raul Ioan; Dergaa, Ismail; Candar, Reyhan; Özdemir, Kübra; Çingöz, Yunus Emre; Man, Cristina Maria
While traditional psychological skills training focuses on cognitive control, mindfulness-based approaches emphasize acceptance and present-moment awareness. The Mindfulness-Acceptance-Commitment (MAC) protocol shows promise for enhancing athletic performance; however, limited research has examined its effects on passion and well-being in tennis players. Forty-four competitive male tennis players (M age = 18.1 ± 1.1 years) were randomly assigned to either a MAC intervention group (n = 22) or a passive control group (n = 22). The MAC protocol consisted of seven weekly 45-minute sessions focusing on mindfulness, acceptance, and values-driven behavior. Primary outcomes included tennis serve performance assessed by certified coaches using a standardized 16-serve protocol. Secondary outcomes included mindfulness skills (Mindful Attention Awareness Scale), subjective well-being (Positive and Negative Affect Schedule, Satisfaction with Life Scale), harmonious passion, and obsessive passion (Passion Scale). Intention-to-treat analyses with 44 participants revealed significant improvements in the MAC group compared to controls. Tennis serve performance improved significantly in the MAC group (pre: 13.18 ± 2.19 to post: 15.09 ± 2.45, t(21) = 7.54, p < .001, d = 0.87) but not in the control group (pre: 13.05 ± 2.33 to post: 12.86 ± 2.41, t(21) = 0.78, p = .442, d = 0.08), with a significant between-group difference at post-test (t(42) = 3.71, p = .001, d = 1.12). Mindfulness skills improved substantially in the MAC group (pre: 39.00 ± 4.18 to post: 52.73 ± 3.65, t(21) = 13.76, p < .001, d = 3.28) compared to controls (pre: 43.55 ± 4.75 to post: 44.32 ± 4.12, t(21) = 1.31, p = .203, d = 0.16), with a significant between-group difference (t(42) = 7.16, p < .001, d = 2.16). Harmonious passion increased significantly in the MAC group (pre: 17.27 ± 2.64 to post: 24.05 ± 4.16, t(21) = 6.15, p < .001, d = 2.57) while remaining stable in controls (pre: 17.86 ± 3.75 to post: 16.91 ± 3.61, t(21) = 1.65, p = .114, d = 0.25), with a significant between-group difference (t(42) = 6.40, p < .001, d = 1.93). Obsessive passion decreased in the MAC group (pre: 23.73 ± 3.66 to post: 16.27 ± 2.86, t(21) = 7.54, p < .001, d = 2.04) while remaining unchanged in controls (pre: 18.00 ± 3.85 to post: 18.41 ± 4.04, t(21) = 0.85, p = .406, d = 0.11), with a significant between-group difference (t(42) =-2.02, p = .050, d =-0.61). Subjective well-being improved markedly in the MAC group (pre: 9.00 ± 7.37 to post: 27.09 ± 7.47, t(21) = 8.37, p < .001, d = 2.45) compared to controls (pre: 4.54 ± 5.85 to post: 8.72 ± 6.08, t(21) = 0.65, p = .526, d = 0.71), with a significant between-group difference (t(42) = 6.85, p < .001, d = 2.07). MAC training represents an effective intervention for enhancing tennis performance, psychological well-being, and adaptive passion while reducing maladaptive passion. These findings support the clinical utility of mindfulness-based approaches in tennis psychology and warrant further investigation on a larger scale.
- MakaleAçık Erişim2026Scopus SJRQ1Effects of a puppet-assisted house-tree-person test on fear and anxiety in children receiving chemotherapy and associated influencing factors: A projective, quasi-experimental study
KAHRIMAN, Ilknur; AKSOY, Bahar; KANDAZ, Ufuk; BORAN, Serpil; GÖGER, Berrin; KIRBAŞ, Zila Özlem
Objectives This study investigated the effect of the puppet-assisted House-Tree-Person Test (HTP-T) on fear and anxiety levels in children undergoing chemotherapy treatment and the factors influencing these outcomes. Methods The study employed a one-group pretest–posttest quasi-experimental design combined with HTP-T analysis. The study was conducted with 29 children aged 5–12 years receiving chemotherapy at the pediatric hematology-oncology outpatient clinics of a university hospital in the Eastern Black Sea Region of Türkiye during the 2022–2024 years. Data were collected using “the Demographic Information Form for Children and Parents, the Children's State Anxiety Scale (CSA), the Children's Fear Scale (CFS), and HTP-T". Data analysis was performed using descriptive statistics, repeated measures ANOVA, and HTP-T analysis. Results Statistically significant differences were observed in children's mean CSA (F = 3.898, p = 0.026, η2 = 0.122) and CFS (F = 5.313, p = 0.008, η2 = 0.159) scores across the pre-treatment, during-treatment, and post-treatment measurements. The HTP-T analysis revealed that children had difficulty regulating anxiety and fear, expressed concerns about family and environmental events, reported feelings of loneliness, and exhibited strong emotional attachment to their families. Conclusion The study demonstrated that incorporating puppet-assisted HTP-T during chemotherapy contributed to reducing children's fear and anxiety and offered a useful approach for identifying influencing factors. Implications for nursing practice HTP-T, a therapeutic play technique incorporating puppetry and projective methods, may be effective in reducing fear and anxiety among children undergoing chemotherapy.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2026Scopus SJRQ1Modal parameter determination and structural assessment of historical minaret under earthquake and wind loads
Yanik, Yusuf; Demirtaş, Betül; Yurdakul, Muhammet; Aymelek, Abdullah; Türker, Temel
This study presents a comprehensive linear time history of a historical masonry minaret called the Grand Mosque Minaret in Bayburt, employing a finite element (FE) model subjected to five distinct real earthquake acceleration records. Ambient vibration tests were conducted within the framework of operational modal analysis (OMA), utilizing enhanced frequency domain decomposition technique to estimate the experimental modal parameters. The FE model, developed under the assumption of linear elastic material behavior, was updated through a vibration-based model updating technique to accurately represent the dynamic characteristics of the structure. Each seismic record was applied as a base excitation, and the corresponding time-dependent structural responses were computed for initial and updated FE models. The analysis yielded critical engineering parameters, including maximum displacement and minimum–maximum principal stress distributions. The results obtained from the FE analyses were evaluated comparatively. Also in this study, the wind loads of the minaret were determined using the TS 498 standard, and structural wind load analyses were performed on the initial and updated FE models. Drift ratio values of the minaret were calculated for earthquake records and wind loads, and the structural performance of the minaret was evaluated comparatively for both models. It has been found that the structural behavior of the minaret was significantly affected by earthquakes. The drift ratio values remained within the controlled damage limit for wind analyses, while earthquake analyses indicated that the minaret was mostly in the collapse limit. The results show that more effective conservation and restoration strategies for cultural heritage structures can be developed by using both FE and experimental methods.
- MakaleYalnız künye2026Scopus SJRQ1Resilience-oriented seismic retrofit of heritage masonry minarets using hybrid base isolation and supplemental damping
Ergun, Mustafa; Tonyali, Zeliha; Kiral, Adnan; Elias, Said
Historic masonry mosques represent a highly vulnerable class of cultural heritage structures whose seismic fragility stems from their complex geometries, heterogeneous material composition, and rigid load-transfer mechanisms. This study presents a resilience-oriented seismic performance improvement of the historic masonry minaret of the Bayburt Grand Mosque, a structure with limited lateral deformation capacity that challenges the applicability of conventional strengthening measures. To address this limitation, a hybrid retrofitting strategy is introduced, integrating lead rubber bearings (LRBs) with supplemental viscous dampers (VDs) at the foundation level. This combined system—implemented for the first time in a historic masonry minaret—aims to enhance energy dissipation and displacement control through a minimally invasive and architecturally compatible approach. Finite element analyses (FEA), coupled with MATLAB-supported optimization routines, were used to calibrate isolator stiffness and damper coefficients. Three configurations were evaluated: fixed-base, LRB-isolated, and hybrid LRB–VD systems. Nonlinear time-history analyses (NTHAs) using the 1992 Erzincan (Otlukbeli) earthquake record quantified displacements, stress–strain responses, and damage progression. Results show that while base isolation mitigates seismic demand, it remains insufficient under restricted deformation capacity. The proposed hybrid system reduces peak horizontal displacements from 22 cm to 12 cm, limits drift ratios below 0.17 %, and lowers maximum tensile stresses from 4.890 MPa to 0.490 MPa—well below the masonry tensile strength of 0.880 MPa. Two iterative analytical design methodologies are additionally introduced to derive effective isolator stiffness and viscous damping coefficients, enabling systematic integration into resilience-focused evaluation frameworks. Overall, the study advances reliability-based, conservation-compatible retrofitting practices for historic masonry minarets and supports sustainable strategies for seismic risk mitigation.
AtıfScopus8WoS7OpenAlex6İncele - MakaleAçık Erişim2026Scopus SJRQ1Determination of complex permittivity of a thin low-loss dielectric sample using state-space approach from waveguide measurements
Hasar, Ugur C.; Ali, Husain; Kaya, Yunus
An extraction procedure is proposed for relative complex permittivity () determination of thin low-loss samples positioned/deposited on a supporting substrate material using waveguide non-resonant microwave measurements. Its substrate thickness and sample thickness independence makes it unique extraction method in comparison with the available retrieval methods which are free from either substrate thickness information only or sample thickness information only. Its theoretical model is constructed on the state-transition matrix and state vector through which the link between and measured scattering (S-) parameters is established. Compared with previous works in the literature, a closed form (explicit) expression of is derived for a two-layer (sample on a substrate material) composite structure, thereby eliminating any numerical analysis or tool. Numerical analyses are implemented for validation of the proposed method as well as assessing the effect of noise and any possible air gap between the sample and its substrate. X-band ( GHz) waveguide measurements of a thinner (around 1.00 mm) polyvinyl chloride (PVC) for different measurement scenarios and measurements of a thin zinc oxide film (m) were performed to evaluate the performance of the proposed extraction method against other similar methods in the literature. Our method can find applications for characterization of thin-film, radar-absorbent material coatings, anti-corrosive paints, or thermal barrier coatings where sample thickness (and substrate thickness) can vary from one sample to another from the same batch.
- MakaleAçık Erişim2026Scopus SJRQ1Non-Destructive Intelligent Microwave Sensing of Water Content in Sand–Water Mixtures Using S-Parameter Features and PLS Regression
Çakır, Mehmet
The accurate and rapid estimation of water content in granular materials is important for geotechnical engineering, construction-material evaluation, agricultural monitoring, and non-destructive material assessment. This study presents a controlled laboratory feasibility framework for estimating water content in sand–water mixtures using microwave S-parameter measurements and physically interpretable features. Sixty measurements were acquired from six nominal mixture levels containing 0%, 5%, 10%, 15%, 20%, and 25% water by mass using a WR-229 waveguide-based fixture over 3.30–4.90 GHz. Descriptors were extracted from the raw and empty-reference-normalized S11 and S21 responses, including extrema, slopes, area-based indicators, band-averaged values, selected-frequency responses, and phase statistics. Ridge regression, partial least squares regression, support vector regression, Gaussian process regression, random forest, and gradient boosting regression were evaluated. The selected PLS model achieved RMSE = 3.56%, MAE = 2.92%, and R2 = 0.826 under leave-one-mixture-level-out group-wise cross-validation, which was used as the primary indicator of generalization to an unseen mixture level. The substantially lower error obtained under repeated-measurement leave-one-out cross-validation primarily reflects within-level repeatability under controlled conditions and should not be interpreted as evidence of universal calibration performance. The results demonstrate that magnitude- and phase-derived microwave descriptors, particularly transmission-based features, provide an interpretable and repeatable framework for water-content estimation under the specific sand type, sample geometry, water source, and laboratory conditions investigated. Further validation using independent preparation batches, different granular materials, measured water conductivity, temperature variation, and field-like conditions is required before practical deployment.
- MakaleYayıncıda açık erişim2026Scopus SJRQ1Social Media-based Interventions to Promote Physical Activity in People with Disabilities: A Systematic Review
Yarımkaya, Erkan; Oğur, Yekta Göksel; Aydemir, Uğur
Purpose: This systematic review summarized and evaluated 13 studies investigating the effectiveness of social media-based interventions to promote physical activity (PA) among people with disabilities (PWD). Methods: Findings regarding study, participant and intervention characteristics, and PA outcomes were extracted. The methodological quality of the studies was assessed using the Crowe Critical Appraisal Tool. Results: Findings regarding the effectiveness of social media-based interventions to promote PA among PWD varied, and provide the support for social media-based PA intervention benefits for people with autism spectrum disorder, attention deficit hyperactivity disorder, physical disability, and cancer patient; however, there was no support for its use in people with developmental coordination disorder. Conclusion: Social media-based interventions may have the potential to promote PA among PWD. However, to fully leverage this potential, further research is needed. This review provides valuable insights for researchers, parents, and educators seeking to promote PA among PWD.
- MakaleAçık Erişim2026Scopus SJRQ4The Effect of Postural Mobility Exercises on the Athletic Performance Success, Proprioceptive Sense and Various Strength Parameters of Traditional Archers; [Postüral Mobilite Egzersizlerinin Geleneksel Okçuların Sportif Performans Başarı, Proprioseptif Duyu ve Çeşitli Kuvvet Parametrelerine Etkisinin İncelenmesi]
Kul, Murat; Hazar, Emre Berk; Boz, Emre; Uçal, Muhammed Salih
The aim of this study is to investigate the effects of eight weeks of TheraBand-based postural mobility exercises on athletic performance, strength, and proprioceptive senses in traditional Turkish archers (TTA). The study involved 24 male volunteer athletes enrolled at Bayburt University who had at least six months of regular archery training history. Participants were divided into experimental and control groups; the experimental group underwent postural mobility exercises three days a week for eight weeks, while the control group continued only their routine archery training. Data collection included assessments of grip and squeeze strength, back-leg strength, shoulder proprioception, shoulder mobility, and TTA shooting performance. The findings showed that the experimental group achieved significant improvement in all parameters, while the control group showed only limited increases in shoulder mobility and archery performance (p < .05). In conclusion, adding TheraBand exercises to traditional training is recommended as an effective method for increasing archers' muscle strength, joint stability, and performance.
- MakaleYalnız künye2026Scopus SJRQ4Microwave assisted green synthesis of nano-sized biogenic silver in extract of Phlomis linearis: potential anticancer and antimicrobial activities
Orçan Çayır, İlayda; Tahta, Beyhan; Cömertpay, Sabahattin; Uruş, Serhan; Bülbül, Ali Savaş; Aygan, Ashabil; Aksan, Mehmet Emrah
Silver nanoparticles (AgNPs) are known for their significant anticancer and antimicrobial activities in the field of medicine. In the present study, AgNPs were synthesized using a microwave-assisted green synthesis process, in which Ag(I) ions were reduced by organic compounds extracted from the leaves and stems of Phlomis linearis, an endemic plant which acted as both reducing and stabilizing agents. Although various species of the Phlomis genus have been studied in the literature, the synthesis of the nano-sized biogenic silver with reducing Ag(I) in the extract of the endemic plant P. linearis is reported here for the first study time, along with the evaluations of its bioactive properties. The obtained AgNPs were characterized by optical, structural, morphological, etc. techniques such as Ultraviolet–visible spectroscopy (UV–Vis.), Fourier-Transform Infrared Spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), transmission electron microscopy (TEM), dynamic light scattering (DLS), and photoluminescence (PL). Gas chromatography − mass spectrometry (GC–MS) and FT-IR techniques were used in order to evaluate the biochemical-reduction mechanism. When their antimicrobial activities were determined by the well diffusion method on six bacterial strains, the results showed that P. linearis exhibited antimicrobial activity against all tested bacteria. Additionally, the investigation of the anticancer activity of the particles by using the MTS method on a breast cancer cell line (MCF-7) and a healthy human cell population (human umbilical vein endothelial cells [HUVEC]) revealed that our AgNPs were more cytotoxic toward the cancerous cells compared to the non-cancerous ones (p < 0.001).
- MakaleAçık Erişim2026Scopus SJRQ1The Relational Online Learner: Self-Directed Learning, University Belonging, and Student Engagement in Online Higher Education from a Self-Determination Theory Perspective
Kayalı, Bünyami; Yavuz, Mehmet; Üstün, Ayşin Gaye; Uçar, Hasan; Erdoğdu, Erdem; Aydemir, Mesut; Bozkurt, Aras
We examined the relationships between self-directed learning skills, university belonging, and student engagement in open online and distance learning environments within the framework of Self-Determination Theory. The research was conducted using a correlational survey model. Data were collected from 696 university students enrolled at a large-scale open, online and distance learning institution in Türkiye. We used three instruments measuring self-directed learning skills, university belonging, and student engagement. The data were analyzed using partial least squares structural equation modeling. The findings indicate that university belonging significantly and positively predicts all dimensions of student engagement. While self-control skills, learning skills, and sustaining the desire to learn significantly explain university belonging, metacognitive awareness and ability to identify sources were found to have no significant effect. Furthermore, it was found that university belonging acts as a significant mechanism in the relationships between self-control skills, learning skills, and sustaining the desire to learn, and student engagement. In this open and distance learning context, student engagement was not explained by individual learning skills alone. University belonging may therefore be one mechanism that partly accounts for the association between self-directed learning and academic participation. The study contributes by testing self-directed learning at the level of its dimensions, by identifying university belonging as a mechanism that partly accounts for its association with engagement, and by situating this model in a large-scale open and distance learning setting.
- MakaleYalnız künye2026Scopus SJRQ1Reading intentions, not just behaviours: a NIKOM-informed pedagogical approach for religious education
Çinici, Murat
Religious education (RE) meets a recurring diagnostic problem: a pupil can recite doctrine, join in ritual talk, and give the ‘right’ moral answer while the underlying belief stays untouched. This article introduces the Intention Code Model (NIKOM; Niyet Kodu Modeli) to RE as a disciplined language for that problem. NIKOM is a mechanistic cognitive framework built on conditional IF→THEN ‘codes’ that probabilistically chain, activate, and align bodily and cognitive systems, and can be rewritten. Its central claim–a surface-compliance paradox, whereby observable behavioural change need not indicate code-level change–maps onto Kelman’s distinction between compliance and internalisation. The article sets out NIKOM for an RE readership, positions it among established RE pedagogies, distinguishes it from Gollwitzer’s implementation intentions, and derives a pedagogical stance, dialogue moves, and a developmental proposal for ‘code literacy’, with worked religious and non-religious vignettes for primary and secondary levels. The setting is non-confessional, educational RE; behaviour is no index of belief, and the affective and spiritual dimensions of learning are not reduced to cognition alone. NIKOM is offered as a theoretical synthesis awaiting validation, not a proven method; the article closes with an ethical analysis of ‘rewriting’ pupils’ codes and a research agenda.