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
Dens invaginatus as a biomechanical risk modifier in dental trauma: finite element analysis
(Wiley, 2026) Ayaz, Emine Şuranur; Aydınoğlu, Sema; Günaçar, Dilara, Nil; Dizdar, Ayberk; Yaylacı, Ecren Uzun; Yaylacı, Murat; Yerebakan, Mukaddes
Introduction/Aims Traumatic dental injuries are common in childhood and may adversely affect functional and psychosocial well-being. Dens invaginatus, a developmental anomaly caused by the infolding of the enamel organ during odontogenesis, alters tooth morphology and may influence biomechanical behavior under traumatic loading. This study aimed to evaluate stress distribution and deformation patterns in permanent maxillary lateral incisors with different types of dens invaginatus using three-dimensional dynamic finite element analysis and to compare them with a morphologically normal tooth.Material and Methods Finite element models representing four dens invaginatus configurations of maxillary lateral incisors (#22) were analyzed under dynamic impact loading generated by a rigid steel sphere (radius 10 mm; velocity 10 m/s). Horizontal and vertical impact scenarios were simulated. In addition, a static occlusal force of 100 N was applied to the palatal surface to reproduce functional contact. Stress distribution and deformation patterns were compared with those of a morphologically normal incisor model.Results Dens invaginatus models showed substantially higher biomechanical responses than the normal tooth under both loading directions. Tooth stresses increased by approximately 110-130%, deformation values nearly doubled, and microstrain levels rose progressively with anomaly severity. The lowest responses were observed in the Type I model, whereas the Type IIIb configuration consistently demonstrated the highest stress, deformation, and strain values. Principal stresses in surrounding structures were also elevated, increasing by roughly 40-70%.Conclusions Dens invaginatus markedly modifies the biomechanical response of lateral incisors subjected to traumatic forces. Both internal morphology and impact direction influence stress distribution, with vertical loading generating greater stresses. Increased biomechanical susceptibility was evident even in the mildest form (Type I), while the most severe configuration (Type IIIb) exhibited the highest stress and deformation responses, indicating that dens invaginatus should be regarded as a clinically relevant biomechanical risk factor in dental trauma assessment.
Split quaternionic representations of horadam sequences and their binet, generating function, and cassini-type identities
(Wiley, 2026) Öztürk, İskender; Çakır, Hasan
This study establishes a novel algebraic connection between Horadam numbers and the split quaternion algebra. To this end, two fundamental constructs are introduced: the Fibonacci Sq,r-split quaternions and the Horadam sq,r-split quaternions, which generalize Horadam numbers within the framework of split quaternions. Several key results are derived, including the Binet-like formula, the generating function, and the Cassini-type identity, each revealing new structural relationships between these algebraic systems. The findings not only extend the scope of Horadam sequences into the realm of hypercomplex numbers but also open potential applications in number theory and algebraic analysis. & Idot;skender & Ouml;zt & uuml;rk and Hasan & Ccedil;ak & imath;r contributed equally to this study.
Evaluation of Turkiye's regional foreign trade intensity between 1995 and 2023 within the scope of adopted trade policies
(Eskişehir Osmangazi Üniversitesi, 2026) Altay, İsmail; Bilici, Özgül
This study analysesT & uuml;rkiye's goods trade with ten different regional country groups between 1995-2023 using the Trade Intensity Index developed by Brown(1949)and Kojima(1964).Countries are grouped according to their geographical location and trade agreements. Export and import intensity is examined for the period in question within the scope of the adopted foreign trade policies.Thefindings indicate that despite increasing trade volume with Asia, structural ties remain weak, while relatively strong ties have been established with Africa. Despite a high trade share with the EU, the low intensity index is noteworthy in terms of the depth of integration
Modeling of VAWT-AFPMSG using the finite element method for wind energy conversion
(Algerian Centre for the Development of Renewable Energy, 2026) Bouhafs, Lina; Tamalouzt, Salah; Bouzida, Ahcene; Şahin, Mustafa Ergin
In the context of the global energy transition and decarbonization efforts, wind energy has become a crucial component of sustainable power generation. Among the various electrical generators utilized, the Axial Flux Permanent Magnet Synchronous Generator has garnered considerable attention due to its significant advantages in wind energy conversion. Its axial configuration is particularly advantageous for applications where space and weight are critical factors. This article presents a detailed modeling and simulation of a vertical axis wind turbine system based on the Axial Flux Permanent Magnet Synchronous Generator. The design process began with the development of a 3D electromagnetic model in ANSYS Maxwell through RMxprt model, where both geometric and magnetic characteristics were defined. In parallel, MATLAB/Simulink was employed to model the wind turbine and implement a Maximum Power Point Tracking algorithm to maximize energy capture and field-oriented control. A cosimulation in Twin Builder integrating Maxwell and Simulink was developed to ensure realistic performance evaluation, enabling dynamic interaction between mechanical and electrical subsystems. This approach provided an effective platform for evaluating system performance in conjunction with the electromagnetic modeling of power electronic circuits.
The Asian Pacific Association of the Study of the Liver expert survey on artificial intelligence-assisted reporting of liver histopathology in metabolic dysfunction associated fatty liver disease
(Springer, 2026) Elangovan H.; Akbary K.; Rastogi A.; Wee A.; Soon G.; Yılmaz, Yusuf; George J.
Introduction: Artificial intelligence (AI) and digital pathology have the potential to augment liver biopsy interpretation in MAFLD in clinical practice and trials assessment. However, attitudes and barriers to its implementation have not been systematically explored. Methods: A survey focusing on conventional liver histology, digital pathology and its AI applications in MAFLD/MASH was conducted among hepatologists and liver pathologists in the Asia Pacific region. Results: AI-assisted digital pathology is perceived to be a valuable addition to existing histological reporting in MAFLD/MASH. Defined standards for application and validation of AI models are important priorities for their implementation. Conclusion: There is consensus among clinical experts in the Asia Pacific that AI-assisted histological assessment is useful in MAFLD/MASH interpretation. However, there remain important challenges to the adoption of these technologies into routine clinical workflows.
