DSpace Arşivi :: Ana Sayfa

İstanbul Gelişim Üniversitesi Kurumsal Açık Erişim Arşivi

DSpace@Gelişim, İstanbul Gelişim 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.

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Gelatin–St. John’s Wort Oil Matrices: Material Properties for Potential Biomedical Applications
(MDPI, 2026) Karamanlıoğlu, Mehlika
This study investigates physicochemical, mechanical, and thermal effects of St. John’s wort (JW) oil on gelatin-based films for potential biomedical applications as there is limited research on gelatin biomaterials containing JW oil as sole bioactive component. Transparent films were fabricated at gelatin:JW oil ratios of 20:0, 20:1, 20:5 (w/w) designated as JW-0, JW-1, JW-2, respectively, via solution casting. Gas chromatography revealed that JW oil is rich in unsaturated fatty acids, predominantly linoleic and oleic acids, while FTIR confirmed their successful integration into the gelatin matrix through the fatty acid peak at 1743 cm−1 . Oil droplets, increasing with oil content was shown by SEM. JW oil improved water durability by reducing water aging by up to 8%. JW oil acted as a plasticizer, raising elongation at break (EAB) from 188% in JW-0 to 231% and 209% in JW-1 and JW-2, respectively. DSC indicated a higher Tmax in JW-1 (116 ◦C) compared to JW-2 (110 ◦C), evidencing better thermal stability. In conclusion, JW oil can be effectively incorporated into gelatin as a single active component. Specifically, JW-1 formulation achieved an optimal balance between mechanical and structural integrity, flexibility, and thermal stability, underscoring its potential as a cost-effective, bioactive wound dressing material.
Information theory and thermal properties of an extended cosine hyperbolic potential model
(Nature Publishing Group, 2026) Hsu, Chou-Yi; Singh, Pradeep Kumar; Yusupov, Yusufbay; Jumanazarov, Doniyor; Mahariq, Ibrahim; Rajhi, Ali A.; Ahmes, Makus
This study presents the information-theoretic measures and molar thermodynamic properties for an extended cosine hyperbolic potential. The analytic expressions for the Fisher information in both position and momentum spaces are derived. The Shannon entropy for both position and momentum spaces are also derived. The Cramér-Rao bound and Beckner-Bialynicki-Birula-Mycielski (BBM) inequality are tested and confirmed, presenting the model as a good fit for the study of information theory. The study of thermodynamic properties is applied to phosphorus (P₂), potassium (K₂), potassium bromide (KBr), and silicon monoxide (SiO) molecules using specific analytical equations. The results for molar enthalpy (H), molar entropy (S), molar Gibbs free energy (G), and molar heat capacity (Cp) for the four molecules across a temperature range of 0 K to 6000 K are numerically obtained. The predicted results demonstrate excellent consistency with experimental data obtained from the National Institute of Standards and Technology (NIST) database. The discrepancies observed indicate minor variations in the model’s accuracy, providing reliable predictions for the molar thermodynamic properties of the molecules. The performance of the model validates its suitability for studying information theory and accurately representing thermal properties.
Child labor in Turkey (2003-2024): An overview of work-related risks
(Andover Medical Publishers, 2026) Yalçın, Esra
Background: Child labor remains a significant issue globally and in Turkey, while the occupational risk faced by child laborers has been ignored.ObjectiveThis study aims to provide a comprehensive examination of occupational accidents, occupational diseases, permanent incapacity, and fatal accidents among child laborers in Turkey, focusing on the effects of national occupational health and safety law and age-specific differences in accident incidence.MethodsA retrospective observational analysis was conducted using official Social Security Institution datasets. Incidence rates of occupational accidents (IROA), occupational diseases (IROD), permanent incapacity (IRPI), and fatal accidents (IRFA) were calculated. The before law (2003-2012) and after law (2013-2024) outcomes were compared using the Mann-Whitney U test. The age differences analysis was examined using the Kruskal-Wallis test, and segmented regression analysis was used to assess trends after the law.ResultsSignificant differences were observed in IROA (p = 0.003) and IRFA (p = 0.004) between the periods before and after the law. Segmented regression further indicated that the legislation was associated with a significant after the law trend in IROA (p = 0.002). Occupational accidents also differed by age (p = 0.001), with the highest risk among 17-year-old child laborers and a progressive increase across age groups.ConclusionsThe findings show that legislative reforms have altered the distribution of occupational accidents among child laborers. Yet, the continuing rise in accident rates indicates that regulations alone are insufficient. Enhancing child labor safety requires coordinated social policies and age-sensitive preventive measures.
Coherent control of dark and bright spatio-temporal solitons of SPPs at a silver silica nano-composite interface with gain-assisted atomic medium
(Nature Publishing Group, 2026) Elahi, Naseem; Ikram, Muhammad; Uddin, Najm; Ur Rahman, Latif; Fatıma, Nahid; Shah, Kamal; Abdeljawad, Thabet
This article investigates the coherent control of spatio-temporal bright and dark soliton pulses along with the associated intensity of surface plasmon polariton (SPP) waves at the interface of silver-silica nano-composite materials and a gain-assisted medium. A considerable control over SPPs soliton pulses is revealed by varying the position, time, and characteristics of the applied driving fields. The strength of solitonic pulses can vary based on system factors, potentially increasing, decreasing, or remaining constant over time. Periodic dark and bright solitons are also observed, with intensity patterns exhibiting exponential decay over time. When dispersion and nonlinearity are compared, stable solitons may maintain a constant intensity level of 60%. Moreover, the strength of surface plasmon polaritons (SPPs) can be adjusted between 0 and 100%. This adjustment is achieved by modifying external fields, allowing for either complete enhancement or total suppression of the SPPs. These findings provide a solid foundation for the development of active, compact, and fast photonic devices. They bridge the gap between light-matter interactions at the quantum level and the advancement of integrated nano-photonic devices. Such devices encompass applications in nano-scale sensing, logic gates, electrochemical sensing, optical switching, and biomedical imaging.
Correction: Effectiveness of AI-enhanced virtual patients for psychiatric interview training in health professions education: a meta-analysis
(Frontiers Media S.A., 2026) Kılınçel, Şenay; Bulut, Furkan; Göksel, Pelin; Usta, Miraç Barış; Mutluer, Tuba; Kılınçel, Oğuzhan
Affiliation “Department of Child and Adolescent Psychiatry, School of Medicine, Akdeniz University, Istanbul, Türkiye”, was omitted for author Tuba Mutluer. This affiliation has now been added for author Tuba Mutluer. . The original version of this article has been updated.