Recep Tayyip Erdoğan Üniversitesi Kurumsal Akademik Arşivi
DSpace@RTEÜ, Recep Tayyip Erdoğan Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve yayınların etkisini artırmak için telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Flux pinning activation energy from levitation force relaxation in a single-grain YBCO bulk superconductor
(Springer, 2026) Güner, Sait Barış; Bekiryazıcı, Zafer
The present study investigates the temperature dependence of the magnetic levitation force for a single-grain YBCO bulk sample with a final diameter of approximately 16 mm and a thickness of approximately 9 mm. This sample was fabricated by the top-seeded melt growth (TSMG) method using an Nd123 seed crystal. The superconducting properties of the single-grain YBCO bulk were examined at various low temperatures (37, 47, 57, 67, and 77 K) using a vibrating sample magnetometer (VSM) and a home-made magnetic levitation force measurement system. The activation energy was estimated from the logarithmic relaxation of the levitation force over the low-temperature range of 37–77 K. The temperature dependence of the estimated activation energy was systematically investigated for a CeO₂-added, TSMG-grown single-grain YBCO bulk superconductor. At 37, 47, 57, 67, and 77 K, the activation energies were found to be 0.078, 0.099, 0.121, 0.143, and 0.166 eV, respectively. The zero-field critical current densities (Jc) were determined to be 19.7 × 104, 12.9 × 104, 8.5 × 104, 5.42 × 104, and 1.96 × 104 A/cm2 at temperatures of 37, 47, 57, 67, and 77 K, respectively. The aim of this study is to improve the understanding of the efficacy of large-scale superconductor levitation across different temperatures.
The spiritual roots of sustainable consumption among Muslim consumers: environmental and health consciousness as mediating pathways
(Multidisciplinary Digital Publishing Institute (MDPI), 2026) Hacıkeleşoğlu, Hızır; Avcı, İbrahim; Vural, Muhammet Enes
Research on sustainable consumption has largely emphasized secular motivations, leaving the psychological role of spirituality/religiosity underexplored within Muslim societies. Addressing this gap, this study investigates the relationship between spirituality and sustainable consumption behaviors (SCBs) among Muslim consumers in Türkiye, with environmental and health consciousness examined as parallel mediating mechanisms. Data were collected from 414 adult Muslim consumers through an online survey and analyzed using confirmatory factor analysis and structural path analysis via Hayes’ PROCESS macro (Model 4). The empirical findings indicate that spirituality is significantly and positively associated with sustainable consumption behaviors both directly and indirectly. Environmental consciousness emerged as a numerically stronger mediating pathway than health consciousness in the relationship between spirituality and sustainable consumption. Notably, when both mediators are included in the model, the direct path from spirituality to sustainable consumption behaviors becomes non-significant, consistent with a full-mediation pattern in the estimated model, in line with the value–attitude–behavior hierarchy. These results suggest that spirituality’s association with consumption decisions is, within the estimated model, transmitted through intervening attitudinal states. The study suggests that sustainable consumption initiatives in Muslim contexts can be meaningfully strengthened by integrating eco-friendly practices with consumers’ underlying spiritual and religious values.
Confidence-gated triage: Coupling drug–target affinity and ADME-T predictions to prioritise compounds for docking
(Multidisciplinary Digital Publishing Institute (MDPI), 2026) Yalçın Özkat, Gözde
Background/Objectives: Molecular docking and molecular dynamics are accurate but computationally expensive, so the compounds entering them must be chosen well. The present study proposes CADT, a confidence-gated affinity–ADME-T docking-triage cascade that decides which compounds are worth docking. Methods: The gate combines an ensemble estimate of drug–target affinity with its epistemic uncertainty and an applicability-domain check. Predicted absorption, distribution, metabolism, excretion, and toxicity (ADME-T) developability is added as a soft flag. All components were trained on openly licensed Therapeutics Data Commons data. Ranking was assessed on the DAVIS and KIBA kinase panels and on BindingDB (Formula presented.), under three split protocols over five seeds. The routing decision was then examined against molecular docking, in which 407 compound–target pairs were docked into six withheld kinases. Results: A Morgan-fingerprint gradient-boosting model reached a concordance index of (Formula presented.), with (Formula presented.) for unseen targets and (Formula presented.) for unseen drugs. Across eight ADME-T endpoints, the area under the ROC curve ranged from (Formula presented.) to (Formula presented.). On the cold-target split the cascade reduced the compounds sent to docking by (Formula presented.) while retaining (Formula presented.) of the true strong binders. Docking measured that reduction at (Formula presented.), and at an equal budget, the gate enriched true binders more than the docking score itself. Conclusions: A transparent pre-screen can prioritise compounds ahead of structure-based calculation at a fraction of its cost. However, the uncertainty and applicability-domain terms act as an abstention mechanism rather than an accuracy gain, and that abstention is not free.
Sugar-sweetened beverage tax intensification, beverage affordability, and food-security safeguards: global evidence from 2022–2024
(Multidisciplinary Digital Publishing Institute (MDPI), 2026) Olgun, İbrahim; Olgun, İbrahim
Sugar-sweetened beverage (SSB) taxes aim to discourage unhealthy consumption, but their implications for broader food affordability also need monitoring. We examine whether changes in SSB excise-tax shares between 2022 and 2024 were associated with beverage affordability, healthy-diet affordability, and food insecurity. The analysis links WHO beverage-tax data with FAO food-system indicators and World Bank controls. First-difference models include 83–113 countries, depending on the outcome, with adjustment for multiple testing. A one-percentage-point increase in excise share was associated with a 0.0023-log-point change in SSB income burden (95% confidence interval −0.0349 to 0.0395). This estimate is small and imprecise. The PPP-price association depends on an anomalous source record, while the three food-system outcomes show no statistically precise associations after multiplicity adjustment. Because food insecurity is measured over overlapping three-year windows, it serves as a contextual indicator. The findings establish neither that tax intensification is ineffective nor that adverse food-system effects are absent. They support joint monitoring of beverage affordability and food access and identify a need for longer panels and household-level evidence.
Experiences of intensive care nurses in their practice of physical restraint among patients: a qualitative study
(Wiley, 2026) Uludağ, Elanur; Akay, Gamze; Albayrak, Özlem; Erden, Yasemin
Introduction: Although physical restraint causes mental and physical harm to patients, such practice occurs worldwide to ensure patient safety. It is non-standard practice for a number of reasons, including the lack of education, training, and protocol. Objective: This study aims to determine the experiences of nurses who apply physical restraint to patients. Methods: A descriptive phenomenological method was employed in this study, wherein semi-structured interviews were the data collection method. In this qualitative study, the data consisted of semi-structured individual interviews with nurses (n = 20). The data were analysed phenomenologically and were arranged with MAXqda 22 analysis software. The study complies with the COREQ checklist. Results: Six main themes were found from the data. The themes were (i) experiences related to nurses' physical restraint procedures, (ii) ethical balance in nursing, (iii) nurses' emotions, (iv) the meaning of physical restraint, (v) nurses' observations regarding patients' reactions to physical restraints, and (vi) the experience of ethical dilemmas. The nurses perceived physical restraint as being uncomfortable, a necessity or an obligation, as beneficial for patients, and a practice seen as punishment. Conclusions: The findings showed that physical restraint elicited diverse thoughts and emotions among nurses, who reported difficulties in coping with these emotions and insufficient knowledge of restraint procedures. Nurses also described the need to protect patient safety while preserving patient autonomy, highlighting the ethical balance involved in decisions concerning physical restraint. Implications for Nursing Practice: This study has provided insight that can guide clinician nurses, educators, and policy-makers in improving physical restraint administration. The lack of knowledge held among nurses as to physical restraint procedures emphasizes the importance of education and training on this topic and can suggest areas of development for pertinent policies and guidelines. Patient or Public Contribution: No patient or public contribution.
