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- MakaleAçık Erişim2025Scopus SJRQ3Experiences of Nurse Managers in the 2023 Kahramanmaras, Turkey Earthquakes: A Qualitative Study
Koroglu Kaba, Nagihan; Bal, Betul; Ozturk, Havva
BACKGROUND: Nurse managers play a critical role in disaster response and management; yet research on their experiences in earthquakes remains limited. OBJECTIVE: This study aimed to explore the experiences of nurse managers in the Kahramanmaras, Turkey, earthquakes. METHODS: A phenomenological approach was used to guide this study, exploring the lived experiences of nurse managers who worked during the 2023 earthquakes in Kahramanmaras, Turkey. Purposive sampling identified participants, and data were collected 2-3 months postearthquake, from April to May 2023, via semi-structured interviews conducted via social media. Thematic analysis was applied to analyze the interview data. RESULTS: A total of 11 nurse managers were interviewed for the study. Fifty-five percent were between the ages of 35 and 44, 64% were female and had a bachelor's degree. Five themes emerged from the data: "being unprepared"(predisaster phase), "emotional difficulties,""communication and coordination issues,""resource shortages"(disaster event phase), and "evaluation and professional satisfaction"(postdisaster phase). CONCLUSION: The study found that most nurse managers reported feeling unprepared for the earthquake despite institutional disaster management practices. They struggled with managing their emotions, resource shortages, and communication-coordination issues. These experiences underscore the need for enhanced disaster training and preparedness for nurses. Collaboration among international health organizations, nongovernmental organizations, and governments is essential to develop disaster management plans to optimize nurses as early responders.
AtıfScopus1WoS1OpenAlex1
İncele - MakaleYalnız künye2025Scopus SJRQ1New results on the global dynamics for a two-species chemotaxis system with two chemicals and logistic sources
Ayazoglu, Rabil; Ekincioglu, Ismail
This paper deals with the following competitive two-species chemotaxis system with two chemicals with a source term of logistic type ut=Δu−χ1∇⋅(u∇υ)+η1u−μ1u2, υt=Δυ−υ+ω, ωt=Δω−χ2∇⋅(ω∇z)+η2ω−μ2ω2, 0=Δz−z+u, (x,t)∈Ω×(0,T) under homogeneous Neumann boundary conditions [Formula presented] and initial conditions u(x,0)=u0(x), υ(x,0)=υ0(x), ω(x,0)=ω0(x), x∈Ω, in a bounded domain Ω⊂RN (N≥1), where the parameters χ1, μ1, μ2>0 and η1, η2, χ2∈R. It is proved that the corresponding initial-boundary value problem possesses a unique global bounded classical solution if one of the following cases holds: (i)χ2≤0, (ii)χ2>0 as well as μ2 is large enough, which partially improves the results of [25].
AtıfScopus2WoS2OpenAlex2İncele - MakaleAçık Erişim2026Scopus SJRQ1Keys to female athlete performance in Paris 2024
Boz, Emre; Adatepe, Eda; Çelik, Hüsniye; Kırkbir, Hakan; Öktem, Tuncay; Ünlü, Yılmaz; Öz, Ümit; Yılmaz, Büşra
The research was conducted to identify the key factors influencing the performance of Turkish female athletes participating in the Paris 2024 Olympic Games. In this context, seven female Olympic athletes who participated in the relevant organization volunteered to take part in the research. A semi-structured interview form prepared by the researchers was used to identify the participants’ views on the factors affecting their performance. Individual interviews were conducted with each participant at different times, and all interviews were recorded. All interview transcripts obtained were analyzed and visualized using MAXQDA 2020 software. In the study, the experiences of female athletes were grouped under five themes: factors most affecting performance, environmental factors, physiological factors, socio-cultural factors, and psychological factors. The findings show that the athletes’ experiences are not limited to athletic performance alone, but are also influenced by multidimensional factors such as organizational shortcomings, environmental conditions, psychological pressure, socio-cultural interactions, and physiological conditions. In the study, first-time participants were positively influenced by motivation, team support, and communication with foreign athletes, while experienced athletes, having higher expectations, criticized factors such as organizational shortcomings, hygiene, and nutrition issues. The study reveals that the factors affecting the performance of female athletes are multidimensional and interactive, emphasizing the importance of comprehensively considering physiological, psychological, environmental, and socio-cultural needs in the planning of international sports organizations. In particular, strengthening health support, nutrition services, cultural adaptation, and social support mechanisms are recommended as measures that will increase athletes’ performance and experience satisfaction.
AtıfOpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ1The effect of dietary education on attitudes and behaviors in hemodialysis patients: A randomized trial
Akeren, Zahide; Çakmak, Vahide Semerci; Kalyoncuo, Servet
Background: Hemodialysis patients are at high risk for poor dietary status, primarily due to limited adherence to complex dietary regimens. Inadequate adherence may lead to complications and negatively adversely affect treatment outcomes. Promoting positive dietary attitudes and behavioral change is essential to improve health in this population. Aim: This study aimed to evaluate the impact of a structured dietary education program on dietary attitudes, daily diet intake, and vital signs in hemodialysis patients. Methods: The study was conducted between December 15, 2023, and March 27, 2024, with 34 patients (17 experimental, 17 control) receiving treatment at a public hospital in northeastern Turkey. Data were collected using the Patient Information Form, 24-Hour Diet Recall, Attitude Scale for Dietary Therapy of Hemodialysis Patients (ASDTHP), and Vital Signs Form. The experimental group received structured dietary education in two weekly 40-min sessions. Analyses were performed using BeBIS 9.0 and SPSS 25. Results: The mean age of participants in the experimental group was 59.94 ± 11.80 years; 64.7 % were male, and 64.7 % were primary/middle school graduates. In the experimental group, significant improvements were found in the total ASDTHP score, including the cognition-influenced and diet culture-related behavioral subdimensions (p < 0.05). Additionally, post-intervention analysis showed showed statistically significant reductions in systolic blood pressure, and pulse rate and increase in potassium intake (p < 0.05). Conclusion: Dietary education improved dietary attitudes and positively influenced certain vital signs, including blood pressure, in hemodialysis patients. However, it did not lead to statistically significant changes in other macronutrient and micronutrient intake variables.
AtıfScopus1WoS1OpenAlex1İncele - MakaleAçık Erişim2025Scopus SJRQ1Design and initial experimental verification of a high-speed electrodynamic levitation measurement system utilizing modular magnetic field sources and aluminium rails
Ozturk, U. Kemal; Mollahasanoglu, Hakki; Abdioglu, Murat; Okumus, Halil Ibrahim; Gedikli, Hasan
This work presents design and development of a modular high-speed electrodynamic levitation (EDL) test system that integrates advanced magnetic field configurations and real-time control capabilities at high operational speeds. The system comprises a rotating aluminium rail and interchangeable magnetic field sources, including permanent magnet array (PMA) and high-temperature superconducting (HTS) bulk, allowing for a variety of experimental configurations. The initial experimental results focused on testing the system through PMA–aluminium rail and HTS–aluminium rail configurations. A key innovation of this system is its modular structure, which allows for easy replacement and reconfiguration of magnetic components and rail geometries. The adaptability of the system enables a thorough investigation of how different magnetic field sources influence magnetic force and dynamic stability at high speeds. Furthermore, the system is fully integrated with a programmable logic controller (PLC) and supervisory control and data acquisition (SCADA) interface, enabling precise real-time monitoring, synchronized control and automatic data acquisition. Experimental results demonstrate the system's capability to measure vertical displacement variations and force fluctuations at different speeds, with resonance effects identified around 145 km/h. The levitation forces of 99 N were measured at a gap of 10 mm, with the PMA at a maximum speed of 283 km/h above an aluminium rail, while it was measured as 16 N with HTS at a vertical gap of 9 mm. This flexible test platform provides a critical foundation for determining the force parameters of the real-scale EDL Maglev technologies and advancing their practical application potential in high-speed transportation.
AtıfScopus3WoS3OpenAlex2İncele - MakaleYalnız künye2026Scopus SJRQ1Evening chronotype and highly processed food consumption: The mediating role of intuitive eating
Esgin, Özge; Ünal, G.
This study examined associations among chronotype, intuitive eating, and highly processed food (HPF) consumption and evaluated the mediating role of intuitive eating, with sex as a potential moderator. This cross-sectional study, conducted via an online survey in Türkiye from October 2025 to January 2026, included 610 adults. Participants completed the Morningness–Eveningness Questionnaire (MEQ), the Intuitive Eating Scale–2 (IES–2), and the Screening Questionnaire of HPF Consumption. The IES–2 comprises four dimensions: unconditional permission to eat (UPE), eating for physical rather than emotional reasons (EPR), reliance on hunger and satiety cues, and body-food choice congruence (B-FCC). Among participants, 20.3% had an evening chronotype, and 68% reported high HPF consumption. Eveningness was associated with higher UPE (β = 0.219, p = 0.002) and EPR (β = 0.148, p = 0.032) and lower B-FCC (β = −0.225, p = 0.002); however, a sex difference emerged only for EPR, with a weaker association in women (β = −0.155, p = 0.029). Lower MEQ scores were significantly associated with higher HPF consumption (β = −0.212, p < 0.001), with no significant sex differences. All analyses were adjusted for age and body mass index. Mediation analyses indicated that UPE (indirect effect: −0.013 for women; −0.022 for men) and B-FCC (−0.006 for women; −0.013 for men) had significant indirect effects linking chronotype to HPF consumption, with no moderating effect of sex. These findings suggest that intuitive eating mechanisms may partly explain the association between evening chronotype and higher HPF consumption.
- MakaleAçık Erişim2026Scopus SJRQ3Effects of Various Bleaching Chemicals on Some Surface Properties of Ebony Species (African, Black, and Macassar)
Ayata, Ümit
The concept of color is not always suitable for some trees according to customers’ preferences. The color of the wooden material changes with processes such as heat treatment, impregnation, bleaching, etc. When the color of the wooden material changes, the surface also undergoes changes in its inherent properties. African ebony (Diospyros crassiflora Hiern.), black ebony (Diospyros ebenum), and Macassar ebony (Diospyros celebica Bakh.) wood species were treated using a single-component bleaching chemical [oxalic acid (C2H2O4)] and double component bleaching chemical [hydrogen peroxide (H2O2) + sodium hydroxide (NaOH)] using a brushing technique. Subsequently, the characteristics of the changes that occurred were determined, including color parameters and whiteness index (WI*) values. The wood species exhibited different behaviors (increases and decreases specific to each test) in response to both bleaching agents. There was an observed increase in the a*, b* and C* values, while the ho values decreased for all wood species. Furthermore, WI* values in directions perpendicular and parallel to the fibers were reduced in all wood species by oxalic acid treatment.
- MakaleAçık Erişim2025Scopus SJRQ1Transient Plane Wave Transmission Through an N-Layer Multilayer Structure with Bianisotropic Behavior
Cem Hasar, Ugur; Kaya, Yunus; Korkmaz, Huseyin; Iliev, Teodor
An analysis based on electromagnetic reflection and transmission properties of multilayer structures are in general needed to get more information about their electromagnetic responses before their implementation for some specific applications involving absorption, shielding, and diagnosis. Such an analysis could be exercised by either frequency-domain or time-domain. While the former one is based on the steady-state response, the latter one is based on the transient response which thus provides more information about electromagnetic properties of multilayer structures. A procedure relying on a direct theoretical time-domain analysis is preferable to a time-domain analysis based on computational procedures such as the finite-time-difference-domain or the fast Fourier transform. In this study, a series presentation of transient plane wave transmission coefficient of N-layer composite structures involving bianisotropic behavior is derived for the first time in the literature in terms of reduced transmission coefficients (the concept of subregion). The wave matrix approach is applied for the theoretical analysis of the reduced transmission coefficient after application of the concept of subregion. Implementation of this concept to our problem is presented step-by-step to make a clear understanding of its application to bianisotropic multilayer structures. The derived reduced transmission coefficient is validated by different multilayer structures (different layer numbers, different layer lengths, and different polarizations) composed of individual layers whose electromagnetic responses are synthesized by the Lorentz dispersion model. Advantages and limitations of the derived formalism are also presented.
- MakaleYalnız künye2026Scopus SJRQ2Frequency-Based Damage Detection with ANN and Seismic Behaviour Assessment of a Historical Masonry Tower
Demirtaş, Betül; Türker, Temel; Yanik, Yusuf; Dede, Tayfun
Nowadays, Artificial Neural Networks (ANNs) are widely used in damage detection because of their powerful computational and exceptional ability to recognize patterns in historical structures. This paper presents the seismic behaviour assessment and structural damage detection performance of the ANN trained with natural frequencies to identify the damage on the Hagia Sophia Bell Tower in Trabzon, Türkiye. Reduction in the stiffness of the structures causes changes in the structural dynamics. Natural frequencies, being key indicators in damage detection, were utilized as input parameters to train the ANN in this study. The study’s scope included updating of the initial finite element (FE) model constituted with SAP2000 software according to the experimental dynamic characteristics obtained from the Civil Engineering Vibration System developed by our work team. The seismic behaviour of the tower was also examined through time history analyses under the effect of strong earthquakes. The required data for the ANN analyses was obtained from the FE modal analysis of the tower. The ANNs dataset was generated separately by simulating both single and double damage scenarios. Possible twelve damage zones were determined according to the places where the highest stresses occurred in the earthquake analysis of the tower. The reduction in the elasticity modulus of each region defined on the tower was considered as damaging effect and used as ANN output parameter. It was shown that ANN trained with natural frequencies can effectively identify the location and severity of damage.
AtıfScopus6OpenAlex7İncele - MakaleYalnız künye2026Scopus SJRQ1Reference-Invariant Permittivity Determination of Low-Loss Solid Dielectric Samples Using Spectral Free-Space Measurements Without Prior Thickness
Hasar, Ugur C.; Ali, Husain; Kaya, Yunus
An extraction method has been proposed for relative permittivity determination εrs of low-loss solid dielectric samples using free-space measurements. It relies on a reference-plane invariant expression with no thickness information a priori, making resistant to conventional free-space measurement errors which may arise from improper information of sample position and thickness. In addition, the method constructed by the state transition matrix (STM) uses closed-form expressions – a feature distinguishes our method from previous STM-based extraction methods requiring a numerical tool or optimization procedure. Furthermore, provided that the sample thickness L is evaluated, as a by-product, first using the derived closed-form objective function away from any thickness-resonance region, the proposed method then determines εrs and L free from thickness-resonance effect, which otherwise can introduce ripples around or at the thickness-resonance frequency. Numerical analysis is performed to validate and assess the performance of our method. Free-space measurements at X-band of two low-loss samples with substantial thickness are performed for validation and accuracy comparison of our method against other similar methods.
- MakaleYalnız künye2025Scopus SJRQ1Optimized model updating and site-specific seismic assessment of a historical masonry bridge
Tayfur, Bilal
This study comprehensively evaluates an 800-year-old masonry bridge using advanced non-destructive testing techniques, an innovative model update process, and site-specific ground motion analysis. Employing Operational Modal Analysis, Ultrasonic Pulse Velocity, and Schmidt Hammer tests, the research meticulously characterized the structural dynamic properties. The preliminary finite element model was rigorously refined utilizing the Tabu Search optimization algorithm by minimizing discrepancies between numerical and experimental modal parameters. Site-specific earthquake records, carefully selected and prepared in accordance with the Turkish Building Earthquake Code, were applied to conduct detailed time-history analyses across 11 distinct ground motion records. Despite experiencing stresses approaching critical thresholds, the bridge demonstrated remarkable structural integrity. While the findings indicate the bridge’s structural soundness under current seismic hazard analysis criteria, the results notably emphasize that the frequency content similarities between the structure and ground motion are more critical for seismic performance assessment than peak ground acceleration (PGA) values, underscoring the importance of continuous monitoring given the region’s complex tectonic characteristics.
AtıfScopus5WoS3OpenAlex4İncele - MakaleAçık Erişim2026Scopus SJRQ1Integrating artificial intelligence into preservice teacher education: enhancing AI literacy and digital material design competency
Gulen, Hilal Nur; Kucuk, Sevda
The rapid advancement of Artificial Intelligence (AI) has transformed educational tools and practices. Integrating AI into instruction supports complex thinking, enriches teaching, and helps educators in material creation and visualization. Therefore, it is essential to equip both students and educators with AI literacy and digital material design competencies in order to support pedagogically sound and ethically responsible instructional practices. Within this context, the present study examines the extent to which an AI-integrated instructional technology course influences pre-service teachers’ AI literacy and digital material design competencies, as well as their perceptions and experiences of learning within an AI-integrated instructional environment. Using a mixed-methods approach, 50 pre-service social studies teachers (41 female, 9 male) participated in a semester-long course. Data were collected through the Artificial Intelligence Literacy Scale, Digital Material Design Competency Scale, and semi-structured interviews. Paired sample t-tests indicated significant gains in both AI literacy and digital material design competencies, with large effect sizes. Qualitative and quantitative findings showed that AI tools not only improved technical abilities but also enhanced pedagogical thinking. The study highlights the importance of AI-integrated curricula in preparing future teachers for modern educational challenges.
AtıfScopus2WoS1OpenAlex3İncele - MakaleAçık Erişim2025Scopus SJRQ2Quantification of phenolics by LC-MS/MS of monofloral and polyfloral Honey: Evaluation of the greenness of the method with MoGAPI and MoGSA
Gerçek, Yusuf Can; Baştürk, Fatma Nur; Özkök, Aslı; Cevahir Öz, Gül; Ecem Bayram, Nesrin
This study evaluated the physicochemical properties, total phenolic content (TPC), total flavonoid content (TFC), antioxidant activity, proanthocyanidin content, and polyphenolic profiles of monofloral and multifloral honey samples produced in Türkiye. In addition, the greenness of the analytical method was assessed using two different evaluation tools: MoGSA and MoGAPI. The TPC and TFC values for multifloral honeys ranged from 0.18–0.65 mg GAE/g and 0.01–0.09 mg QE/g, respectively, whereas for monofloral honeys, these values ranged from 0.16–0.98 mg GAE/g and 0.01–0.37 mg QE/g. The highest CUPRAC and DPPH values were observed in Erica spp. honey, consistent with its TFC and total individual polyphenolic compound results. Notably, the Erica spp. honey sample exhibited a significantly higher gallic acid content (26.13 µg/g) compared to the other samples. These findings suggest that Erica spp. honey characterized by its high TPC, antioxidant activity, and distinctive polyphenolic profile, may serve as a notable dietary source of antioxidants. Additionally, the MoGAPI and MoGSA scores of the method were determined to be 84 and 91.67, respectively, demonstrating its high environmental sustainability.
AtıfScopus4WoS4OpenAlex3İncele - MakaleAçık Erişim2026Scopus SJRQ4ANDROSACE ARMENIACA SUBSP. VULCANICA SEFALI & EROĞLU: A NEW TAXON FROM EASTERN ANATOLIA, TÜRKIYE
Sefali, Abdurrahman; Korkmaz, Eren; Eroğlu, Hüseyin
A new taxa, Androsace armeniaca subsp. vulcanica Sefalı & Eroğlu nov. (Primulaceae) is described and illustrated from Ağrı Province, Türkiye. It is morphologically assigned to Androsace sect. Andrapsis based on its long scape and small flower habit and the presence of glandular hairs covering the calyx and scape. This new taxon closely resembles A. armeniaca subsp. armeniaca var. armeniaca and A. armeniaca subsp. armeniaca var. macrantha, but is easily distinguished by its overall habitus, smaller flowers, distinct corolla and calyx characteristics (including the color and lobe shape), pedicel length and habitat (volcanic areas).
- MakaleAçık Erişim2026Scopus SJRQ4Association Between Health Literacy and Mediterranean Diet Adherence Among Adult Women in Türkiye
Çam, Alper Veli; Şik, Elif
Objective: Health literacy is widely recognized as an important determinant of informed health-related decision-making. However, evidence regarding whether health literacy translates into healthy eating behaviors, particularly adherence to the Mediterranean diet, remains limited. This study aimed to examine the association between health literacy levels and adherence to the Mediterranean diet among adult women living in Türkiye. Methods: This cross-sectional study was conducted with 400 women aged 18 years and older residing in Türkiye. Data were collected using a sociodemographic information form, the Turkish Health Literacy Scale–Short Form, and the Mediterranean Diet Quality Index (KIDMED). Health literacy levels were categorized as inadequate, problematic–limited, adequate, and excellent, while Mediterranean diet adherence was classified as low, moderate, or optimal. Ordinal logistic regression analysis was performed to examine the association between health literacy and adherence to the Mediterranean diet, adjusting for sociodemographic variables (age, education, income, and occupation). Findings: Among the participants, 25.3% had inadequate health literacy, 31.8% had problematic–limited health literacy, 34.0% had adequate health literacy, and 9.0% had excellent health literacy. Mediterranean diet adherence was low in 34.5% of participants, moderate in 52.3%, and optimal in 13.3%. The ordinal logistic regression analysis revealed that, after adjusting for sociodemographic variables, one dimension of health literacy (Cognitive Health Literacy) was significantly associated with Mediterranean diet adherence, whereas no significant association was observed for the other dimension. Conclusion: The findings suggest that certain dimensions of health literacy may be associated with adherence to the Mediterranean diet when sociodemographic factors are taken into account. These results highlight the importance of considering both individual knowledge and contextual factors in understanding dietary behavior. Future research should further explore the role of nutrition-specific literacy and structural determinants in shaping healthy eating practices.
- MakaleAçık Erişim2025Scopus SJRQ3Investigation of cytochrome B mutations, and UCP2 and STC1 gene expressions in patients with bipolar disorder
Uzunçakmak, Sevgi Karabulut; Özcan, Halil; Dirican, Ebubekir
Objective The aim herein was to investigate mitochondrial cytochrome B (MT-CYB) mutations in individuals with bipolar disorder. Stanniocalcin-1 (STC1) and uncoupling protein 2 (UCP2) mRNA expressions and their relationship with clinical data and each other were also investigated. Method The blood samples of 100 individuals were included in this study. Real-time PCR was used to evaluate mRNA expressions of STC1 and UCP2. Genetic alterations were investigated via Sanger DNA sequencing. An in silico analysis was performed to reveal the phenotypic effects of MT-CYB mutations. Results In the MT-CYB gene of the bipolar disorder patients, the most seen mutations were the T194A A>G mutation at position 1532, G deletion at position 15498, and C>A L236I mutation at position 15452. Most of the mutations appeared to be neutral or benign. The UCP2 and STC1 mRNA expression levels were significantly higher in the patients than in the healthy controls (P = 0.0124 and P < 0.0001, respectively). The area under the curve values of the receiver operating characteristic curve analysis for UCP2 and STC1 were 0.6631 (P = 0.0123) and 0.8059 (P < 0.0001), respectively. No significant relationship was observed between the gene expressions and the routine laboratory findings. There was a positive correlation between the UCP2 and STC1 mRNA expressions in the bipolar disorder patients (r = 0.03559, P = 0.0306). Conclusion Expression of UCP2 and STC1 may be important parameters in bipolar disorder. MT-CYB mutations may be related to gene expressions. Comprehensive studies on bipolar disorder will help better understand UCP2 and STC1 gene functions.
- MakaleYalnız künye2025Scopus SJRQ3Biosynthesis of alternan-stabilized selenium nanoparticles: A study on characterization and applications for antibacterial and antifungal purposes
ElObeid, Tahra; Yilmaz, Mustafa Tahsin; Ispirli, Humeyra; Sagdic, Osman; Taylan, Osman; Basahel, Abdulrahman; Karaboga, Dervis; Durak, Muhammed Zeki; Dertli, Enes
In this study, the alternan/selenium nanoparticles (Alt/SeNPs) were characterized with respect to their formation, morphology, size, selenium distribution, molecular, crystallographic, and thermal properties using UV–Vis spectroscopy, SEM, TEM, EDAX, FTIR, XRD, DSC and TGA measurements. UV–VIS measurements confirmed the synthesis of nanoparticles by observing a maximum surface plasmon resonance peak at 212 nm. In this study, alternan contributed to stabilizing the dispersion of SeNPs, resulting in a cluster of spherical and well-dispersed nanoparticles ranging in size from 50 to 90 nanometers. Nanoparticles were found to be highly thermally stable and in a nanocrystalline structure. The ABTS and CUPRAC radical scavenging activities of Alt/SeNPs were remarkable (95% and 78% at 4 and 6 mg/mL levels of Alt/SeNPs, respectively). Alt/SeNPs had also good inhibitory activities (3.5–4.0 and 4–15 mm of inhibition zone levels at 5 mg/mL level of Alt/against foodborne pathogenic bacteria and fungi, respectively).
AtıfScopus1WoS2OpenAlex2İncele - MakaleAçık Erişim2025Scopus SJRQ2Tri-method analysis of contact mechanics in orthotropic-isotropic materials
Öner, Erdal; Oktay, Mine Gül; Uzun Yaylacı, Ecren; Yaylacı, Murat; Mirzaloğlu, İrem
This study examines the contact mechanics of a homogeneous orthotropic layer resting on a homogeneous isotropic half-space without being bonded, subjected to loading by a rigid cylindrical punch. The effect of the orthotropic layer’s body force has been taken into account in the study. The study is conducted in three phases. In the first phase, the contact problem is analytically tackled using advanced methods such as elasticity theory, integral transform techniques, and Gauss–Chebyshev integration. The second phase utilizes finite element analysis through ANSYS software, accurately modeling the system. In the final phase, an artificial neural network is employed, allowing the system to learn and recognize intricate patterns in the data. The standout feature of this study is its thorough comparison of these three distinct methodologies, offering a comprehensive understanding of the contact mechanics between isotropic and orthotropic materials. The results reveal key insights into contact length, maximum contact stress, critical separation load, and separation distance, all as functions of critical dimensionless parameters. This study is significant in today’s advancing field of contact mechanics as it not only explores the combined impact of body forces and the interaction between orthotropic and isotropic materials but also uniquely compares the results using three distinct methods, offering comprehensive insights that address both theoretical and practical challenges.
AtıfScopus27WoS27OpenAlex22İncele - MakaleYalnız künye2026Scopus SJRQ1AI-Assisted formative assessment in social studies education: development of an NLU-integrated smart diagnostic branched tree platform and testing its effect
Yetisensoy, Okan
Formative assessment practices have been a significant focus in Social Studies education for many years. One commonly used technique in these practices is the diagnostic branched tree, which is designed to assess students’ understanding through a branching structure based on their responses. While this technique shows promise for identifying students' learning status and gaps throughout the ongoing process, it presents several structural limitations. This research aims to address these limitations by integrating diagnostic branched trees with natural language understanding, a key AI technique in educational assessment, thereby enhancing their diagnostic capabilities and making them smarter tools in educational settings. Furthermore, this research seeks to evaluate the impact of this revised system in middle schools within a practical setting. Following the development phase, the results of the experimental study demonstrated that the revised system had a significantly positive impact on students' learning performance. Qualitative data, meanwhile, suggested that this success was largely due to the system's ability to provide formative feedback and personalized guidance, which fostered metacognition and self-regulated learning. At this point, considering the positive transformations brought about by technology, it is recommended that innovative technologies be developed to enhance formative assessment across various levels of K–12 education.
- DüzeltmeAçık Erişim2026Scopus SJRQ2Corrigendum to “Life satisfaction and problematic online gaming among young adults: the mediating roles of depression, anxiety, and stress” [Entertain. Comput. 58 (2026) 101206]
Bekir, Seyhan; Yayla, İbrahim Erdoğan; Makas, Samet; Manci, Egemen; Yıldırım, Murat
The authors regret that “The authors regret that the Ethics Committee date and approval number were incorrectly reported in the Methods section of the published article. The incorrect information has been removed from the Methods section, as the correct Ethics Committee approval details are already provided in the Ethical Approval section of the article. The authors would like to apologise for any inconvenience caused”. The authors would like to apologise for any inconvenience caused.
