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Article Citation - WoS: 5Citation - Scopus: 5Numerical Investigation of Store Separation From Cavity Problems at High Speeds(Sage Publications Ltd, 2023) Abuhanieh, Saleh; Akay, Hasan U.In this work, the ability of open-source CFD tools to conduct store separation simulations from cavities is evaluated and validated using a generic test case from the literature. Firstly, the ability and accuracy of these tools for solving cavity flows at high speeds are evaluated. Secondly, their competence in predicting the trajectory of a generic store from a generic deep cavity is checked. Finally, and in order to reduce the associated computational costs, a release-time dependability factor from the recent literature is studied and evaluated. The obtained results using the selected open-source CFD tools matched quite well with the wind tunnel results. Furthermore, the results show that predicting the release-time dependability using a quantified index/factor can be a potential remedy for reducing the computational cost for this type of CFD simulations.Conference Object The Psychometric Properties of the Hogg Eco-Anxiety Scale in the Turkish Context(Hogrefe Ag-hogrefe Ag Suisse, 2023) Turkarslan, Kutlu Kagan; Kozak, Ekin Doga; Yildirim, Julide CerenArticle Citation - WoS: 6Citation - Scopus: 6Revealing Defect Centers in Pbwo4 Single Crystals Using Thermally Stimulated Current Measurements(Aip Publishing, 2024) Isik, M.; Gasanly, N. M.The trap centers have a significant impact on the electronic properties of lead tungstate (PbWO4), suggesting their crucial role in optoelectronic applications. In the present study, we investigated and revealed the presence of shallow trap centers in PbWO4 crystals through the utilization of the thermally stimulated current (TSC) method. TSC experiments were performed in the 10-280 K range by applying a constant heating rate. The TSC spectrum showed the presence of a total of four peaks, two of which were overlapped. As a result of analyzing the TSC spectrum using the curve fit method, the activation energies of revealed centers were found as 0.03, 0.11, 0.16, and 0.35 eV. The trapping centers were associated with hole centers according to the comparison of TSC peak intensities recorded by illuminating the opposite polarity contacts. Our findings not only contribute to the fundamental understanding of the charge transport mechanisms in PbWO4 crystals but also hold great promise for enhancing their optoelectronic device performance. The identification and characterization of these shallow trap centers provide valuable insights for optimizing the design and fabrication of future optoelectronic devices based on PbWO4.Article Citation - WoS: 1Citation - Scopus: 1Creative Design Engineering Education for Human-Society Integrated Intelligent Systems(Sage Publications Inc, 2026) Erden, Zuhal; Erden, AbdulkadirThe essence and vital roots of scientific activities create theoretical propositions and models that provide unique integrity of the associated concepts, definitions, approaches and methodological components. Design engineering education has made great progress to date by integrating modern methods and tools into the existing process models focused on unique curriculum programs for students' progress during various scientific and technical levels. Contemporary and integrated socio-scientific environments, however, are generally more productive and initiative for future success stories of engineering graduates with high qualifications and science/technology-motivated professional life. Today's global transition from the "industrial-digital age" to the "sustainable knowledge economy and digital society" opens a new path for design engineering education, enforcing a paradigm shift towards training creative professionals who develop and implement new knowledge in real-world social environments. This paper presents and discusses the models, methods and tools to establish a road-map into next-generation creative design engineering education paradigm.Conference Object Citation - WoS: 1Investigation of the Effectiveness of a Pelvic Floor Muscle Training Mobile Application in Women With Stress Urinary Incontinence: Randomized Controlled Trial(Springer London Ltd, 2022) Sonmer, E.; Oztoprak, E.; Dokmeci, F.; Karakaya, G.Article Baby Steps of Parenting: Turkish Adaptation of Infancy Parenting Styles Questionnaire and Mother- and Infant-Related Characteristics Affecting Parenting in Infancy(Wiley, 2025) Bahtiyar-Saygan, BaharThe crucial importance of parenting for human development is well known, yet there has been little investigation, particularly regarding infancy parenting. This study investigates mother- and infant-related characteristics affecting parenting styles in the first year after birth. Additionally, adapting an Infancy Parenting Styles Questionnaire (IPSQ) to Turkish is aimed. In total, 110 mothers with babies in the first year of their lives (M age in months = 6.39, SDage in months = 3.72; 70 girls) participated in the study. Mothers filled out the IPSQ, Early Parenting Attitudes Questionnaire (EPAQ), Karitane Parental Self-Confidence Scale (KPSC), and Parental Stress Index-Short Form (PSI-SF). Four components emerged: involvement, discipline, anxiety, and routine. The IPSQ was found to be reliable (alpha = .81) and valid. The findings revealed that income, the number of children, and parental confidence were significant predictors for involvement; maternal education, parental confidence, parenting stress, and sleep wellness of the baby were significant predictors for discipline; and the number of caregivers and parental confidence were significant predictors for routine sub-components. Also, results indicated higher involvement and lower discipline in primiparous compared to multiparous mothers. The findings were discussed in light of the literature regarding the antecedents of parenting and its developmental outcomes.Article Citation - WoS: 3Citation - Scopus: 3Expectancy From, and Acceptance of Augmented Reality in Dental Education Programs: a Structural Equation Model(Wiley, 2024) Toker, Sacip; Akay, Canan; Basmaci, Fulya; Kilicarslan, Mehmet Ali; Mumcu, Emre; Cagiltay, Nergiz ErcilObjectiveDental schools need hands-on training and feedback. Augmented reality (AR) and virtual reality (VR) technologies enable remote work and training. Education programs only partially integrated these technologies. For better technology integration, infrastructure readiness, prior-knowledge readiness, expectations, and learner attitudes toward AR and VR technologies must be understood together. Thus, this study creates a structural equation model to understand how these factors affect dental students' technology use.MethodsA correlational survey was done. Four questionnaires were sent to 755 dental students from three schools. These participants were convenience-sampled. Surveys were developed using validity tests like explanatory and confirmatory factor analyses, Cronbach's alpha, and composite reliability. Ten primary research hypotheses are tested with path analysis.ResultsA total of 81.22% responded to the survey (755 out of 930). Positive AR attitude, expectancy, and acceptance were endogenous variables. Positive attitudes toward AR were significantly influenced by two exogenous variables: infrastructure readiness (B = 0.359, beta = 0.386, L = 0.305, U = 0.457, p = 0.002) and prior-knowledge readiness (B = -0.056, beta = 0.306, L = 0.305, U = 0.457, p = 0.002). Expectancy from AR was affected by infrastructure, prior knowledge, and positive and negative AR attitudes. Infrastructure, prior-knowledge readiness, and positive attitude toward AR had positive effects on expectancy from AR (B = 0.201, beta = 0.204, L = 0.140, U = 0.267, p = 0.002). Negative attitude had a negative impact (B = -0.056, beta = -0.054, L = 0.091, U = 0.182, p = 0.002). Another exogenous variable was AR acceptance, which was affected by infrastructure, prior-knowledge preparation, positive attitudes, and expectancy. Significant differences were found in infrastructure, prior-knowledge readiness, positive attitude toward AR, and expectancy from AR (B = 0.041, beta = 0.046, L = 0.026, U = 0.086, p = 0.054).ConclusionInfrastructure and prior-knowledge readiness for AR significantly affect positive AR attitudes. Together, these three criteria boost AR's potential. Infrastructure readiness, prior-knowledge readiness, positive attitudes toward AR, and AR expectations all increase AR adoption. The study provides insights that can help instructional system designers, developers, dental education institutions, and program developers better integrate these technologies into dental education programs. Integration can improve dental students' hands-on experience and program performance by providing training options anywhere and anytime.Article Differences of Microbial Growth and Biofilm Formation Among Periprosthetic Joint Infection-Causing Species: an Animal Study(Springer Science and Business Media Deutschland GmbH, 2025) Ertan, M.B.; Ayduğan, M.Y.; Evren, E.; İnanç, İ.; Erdemli, E.; Erdemli, B.Purpose: The most frequently used surgical procedures for periprosthetic joint infections (PJIs) are debridement, antibiotics, and implant retention (DAIR), as well as single- or two-stage revision arthroplasty. The choice of surgery is made depending on the full maturation of the biofilm layer. The purpose of this study was to evaluate the biofilm formation and microbial growth using common PJI-causing agents and compare its development on the implant surface. Methods: The in vivo study was performed using 40 Sprague–Dawley rats divided into five groups (n = 8/group): Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Candida albicans, and control. Six standard titanium alloy discs were placed into the subcutaneous air pouches of the interscapular areas of the rats. After the inoculation of microorganisms, disc and soft tissue cultures were collected at 2-week intervals for 6 weeks, and the microbial load and the microscopic appearance of the biofilm were compared. Results: The disc samples from the S. aureus group had the highest infection load at all time points; however, in soft tissue samples, this was only observed at week 4 and 6. Electron microscopic images showed no distinctive differences in the biofilm structures between the groups. Conclusion: S. aureus microbial burden was significantly higher in implant cultures at week 2 compared to other PJI-causing agents examined. These results may explain the higher failure rate seen if the DAIR procedure was performed at < 3–4 weeks after the PJI symptom onset and support the observation that DAIR may not be effective against PJIs caused by S. aureus. © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2025.Article Citation - WoS: 1Citation - Scopus: 2Design of a Ratio Control Algorithm for a Fluid Catalytic Cracking System in an Universal Oil Product Context(Maik Nauka/interperiodica/springer, 2024) Atiyah, Safa Khalaf; Aljanabi, Ahmed Yaseen Ali; Ahmed, Mohammed S.; Al-Timimi, Buthainah Ali; Mhmood, Ali H.This paper delves into the intricate dynamics of industrial fluid catalytic cracking, a pivotal process in refining universal oil products (UOP). At the core of this investigation is the endeavor to derive a comprehensive mathematical model that captures the essence of mass and energy balances within a UOP fluid catalytic cracking unit. The study's central objective is to explore and apply a ratio control algorithm in two distinct operational scenarios. In the first scenario, the ratio controller is strategically positioned after the control valve for the regenerator's input air, while in the second, it precedes the control valve. The primary focus here is the meticulous control of outlet temperatures for both the riser and regenerator reactors. Leveraging the capabilities of MATLAB software, the research methodically simulates the fluid catalytic cracking process. It introduces variables such as the gas oil feed rate, along with the temperatures of the gas oil feed and air, to rigorously test the efficacy of the proposed ratio control algorithm. The results of this investigation reveal a notable superiority of the ratio control in case one over case two. In the riser and regenerator reactors, this advantage is demonstrated by improved stability and operational efficiency, as evidenced by lower integral absolute error (IAE) readings and a quicker approach to the intended setpoint temperatures.Article Citation - Scopus: 2Türbülans modellerinin DARPA SUBOFF statik sürükleme testi üzerinden incelenmesi(Gazi Univ, Fac Engineering Architecture, 2022) Atik, HediyeBu çalışmada DARPA SUBOFF su altı aracının manevra benzetimlerinde kullanılacak hidrodinamik katsayılarının hesaplanmasında izlenecek yöntem statik sürükleme (İng. static drift) test benzetimleri ile belirlenmiştir. Su altı araçlarının manevralarının belirlenmesinde kullanılan hidrodinamik katsayıların sayısal olarak yeterli doğrulukta elde edilmesi, çözümlemelerde kullanılan çözüm ağı ve türbülans modelleri ile ilişkilidir. Çalışmada ticari yazılım olan ANSYS Workbench yazılımı kullanılmıştır. Uygun çözüm ağı büyüklüğünün belirlenmesi Richardson Extrapolation metoduna dayalı Grid Convergence Index (GCI) yöntemi ile yapılmıştır. Bu yöntemle Spalart Almaras türbülans modeli kullanılarak üç farklı çözüm ağı büyüklüğü ile elde edilen sonuçların etrafındaki ayrıklaştırma hata bandı tahmin edilmiştir. Bunun yanısıra bu çözümler 14 milyon Reynolds sayısında 0 ila 18 derece yana kayma açılarında yapılan testlerin sonuçları ile karşılaştırılmıştır. Eleman sayısındaki artış ile çözümleme sonuçlarının deneysel veriye yaklaştığı gözlenmiştir. Uygun çözüm ağı seçiminin ardından Realizable k-ε ve SST k-ω modelleri ile analizler tekrarlanarak türbülans modeli opsiyonları incelenmiştir. Çalışmanın sonucunda, 18 derece yana kayma açısına kadar bir-denklemli Spalart Almaras türbülas modelinin pratik uygulamalar için uygun olduğu değerlendirilmiştir. Yüksek kayma açılarının ele alınması gereken durumlarda iki-denklemli SST k-ω türbülans modelinin kullanımının tekrar değerlendirilmesi tavsiye edilmektedir.
