Fakülteler / Faculties
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Item The Role of Post-Traumatic Stress Symptoms and Post Migration Life Difficulties for Future Aspirations of Iraqi and Syrian Asylum Seekers(Başkent Üniversitesi Sağlık Bilimleri Fakültesi, 2024-07-12) Yildiz, Aylin Demirli; Strohmeier, DagmarThe majority of asylum seekers experience some kind of traumatic events before or during their flight and their challenging experiences do not end after resettlement. Still, they need to envision and build their future life in the host country. Moreover, asylum seekers' future aspirations need to be differentiated from the satisfaction of essential needs. We (1) measured future aspirations (FA); (2) explored whether FA and post-migration life difficulties (PMLD) differ between asylum seekers with high and low levels of post-traumatic stress symptoms (PTSS); and (3) examined whether PTSS, PMLD, gender, age, and length of stay are associated with different types of FA. In total, 139 Iraqi and Syrian asylum seekers (55 female, 83 male) aged 18 to 67 years (M = 34.03, SD = 10.35) participated. A four-factor structure of FA was confirmed by confirmatory factor analysis (CFA). Participants with high levels of post-traumatic stress symptoms reported higher levels of PMLD and lower levels of FA related to their home country. FA related to the host country and FA related to occupation were predicted by lower levels of post-traumatic stress symptoms, while future aspirations related to the home country were predicted by higher levels of PMLD. Results indicate that asylum seekers who experienced more traumatic events before they migrated are more reluctant to return to these places in the future. Treating the psychological impairments of this highly vulnerable group and relaxing the manifold structural barriers are crucial to foster their construction of a future life.Item A Pilot Study on Comparison of Teaching Workloads of Academicians Based on Working Periods During and Before the COVID-19 Pandemic(Başkent Üniversitesi Mühendislik Fakültesi, 2025-01-25) Yorulmaz, Muhammed; Can, Gulin Feryal; Toktas, PelinThe COVID-19 pandemic has had a profound impact on society, greatly changing the structure of social and working lives. Educational institutions, especially in higher education, were forced to suspend face-to-face education and switch to distance education. This change inevitably affected the working styles and workloads of academics. This study aims to explore the effects of the COVID-19 pandemic on academic teaching workloads by examining transaction data for a one-year period before and during the pandemic. The data were obtained from the system logs of a learning management system platform, which was used extensively during the pre-pandemic and pandemic periods, and were analyzed in terms of transaction density, day, and time of transactions. The findings from the pre-pandemic period showed that the academic workload was higher on weekdays than on weekends. However, with the transition to distance education during the pandemic, the difference between weekday and weekend workloads diminished significantly. Additionally, the working hours shifted during the pandemic by approximately one hour to later hours in the day.Item Is There A Relationship Between The Severity Of Disease İn Major Depressive Disorder Patients And Dry Eye Disease?(Başkent Üniversitesi Fen Edebiyat Fakültesi, 2024-04-05) Gokce, Gizem Dogan; Metin, MervePurposeTo investigate dry eye disease (DED) in newly diagnosed patients with depressive disorder (MDD). MethodThis observational study included 48 MDD patients in Group 1 and 20 healthy controls in Group 2. Psychiatric and ophthalmic examinations, Beck Depression Inventory (BDI), Ocular Surface Disease Index (OSDI), Schirmer's test, tear breakup time (TBUT), Meibomian gland dysfunction (MGD), and ocular staining were conducted. The results were statistically compared. ResultsThe participants, comprising 32 men and 36 women, had a mean age of 31.08 +/- 11.7 years (18-64 years). Group 1 had a mean BDI score of 30.87 +/- 8.56, while Group 2 had a score of 1.3 +/- 1.3 (p < 0.001). In Group 1, 28 patients were diagnosed with DED, whereas in Group 2, six subjects were diagnosed with DED. The mean Schirmer's results in Group 1 and Group 2 were (mm/5 min) 10.87 +/- 2.44 and 12.70 +/- 2.3, respectively, and were significantly lower in Group 1 (p < 0.001). The mean OSDI scores in Group 1 (34.95 +/- 15.8) were significantly higher compared to Group 2 (3.2 +/- 3.1) (p < 0.001). There was no significant difference in mean TBUT between Group 1 (9.41 +/- 2.6 s) and Group 2 (9.8 +/- 0.61 s) (p > 0.05). Significant correlations were found between BDI scores and Schirmer's results as well as OSDI scores (p < 0.05, p = 0.02, respectively). No statistically significant correlations were found between BDI scores and TBUT or MGD (p > 0.05). ConclusionDED was found to be more prevalent in the MDD group. The severity of MDD and DED, as indicated by BDI, OSDI, and Schirmer's results, was found to be correlated. It was observed that patients with higher depression scores had more severe dry eye. As a result, we recommend performing ophthalmic examinations in newly diagnosed MDD patients.Item Observational Tests Of Asymptotically Flat r2 Spacetimes(Başkent Üniversitesi Mühendislik Fakültesi, 2024-04-07) Zhu, Tao; Nguyen, Hoang Ky; Azreg-Ainou, Mustapha; Jamil, MubasherA novel class of Buchdahl-inspired metrics with closed-form expressions was recently obtained based on Buchdahl's seminal work on searching for static, spherically symmetric metrics in R-2 gravity in vacuo. Buchdahl-inspired spacetimes provide an interesting framework for testing predictions of R(2 )ravity models against observations. To test these Buchdahl-inspired spacetimes, we consider observational constraints imposed on the deviation parameter, which characterizes the deviation of the asymptotically flat Buchdahl-inspired metric from the Schwarzschild spacetime. We utilize several recent solar system experiments and observations of the S2 star in the galactic center and the black hole shadow. By calculating the effects of Buchdahl-inspired spacetimes on astronomical observations both within and outside of the solar system, including the deflection angle of light by the Sun, gravitational time delay, perihelion advance, shadow, and geodetic precession, we determine observational constraints on the corresponding deviation parameters by comparing theoretical predictions with the most recent observations. Among these constraints, we find that the tightest one comes from the Cassini mission's measurement of gravitational time delay.Item Azoles Display Promising Anticonvulsant Effects Through Possible Ppar-Α Activation(Başkent Üniversitesi Eczacılık Fakültesi, 2024-05-25) Sari, Suat; Yurtoglu, Sibel; Zengin, Merve; Marcinkowska, Monika; Siwek, Agata; Sarac, SelmaAzoles such as nafimidone, denzimol and loreclezole are known for their clinical efficacy against epilepsy, and loreclezole acts by potentiating gamma-aminobutyric acid (GABA)-ergic currents. In the current study, we report a series of azole derivatives in alcohol ester and oxime ester structure showing promising anticonvulsant effects in 6 Hz and maximal electro shock (MES) models with minimal toxicity. The most promising of the series, 5f, was active in both 6 Hz and MES tests with a median effective dose (ED50) of 118.92 mg/kg in 6 Hz test and a median toxic dose (TD50) twice as high in mice. The compounds were predicted druglike and blood-brain barrier (BBB) penetrant in silico. Contrary to what was expected, the compounds showed no in vitro affinity to GABAA receptors (GABAARs) in radioligand binding assays; however, they were found structurally similar to peroxisome proliferator-activated receptors alpha (PPAR-alpha) agonists and predicted to show high affinity and agonist-like binding to PPAR-alpha in molecular docking studies. As a result, 5f emerged as a safe azole anticonvulsant with a wide therapeutic window and possible action through PPAR-alpha activation.Item A Robust Aluminum Material Selection Process in the Aviation Industry: A Linear Discrete System Stability Test Perspective for Fuzzy Multicriteria Decision-Making(Başkent Üniversitesi Mühendislik Fakültesi, 2024-04-10) Ic, Yusuf Tansel; Hamzaoglu, Burak Meric; Yurdakul, MustafaAluminum parts are used in the aviation industry because of the need for light. However, in addition to lightness, critical parts that must have high strength properties have also been developed. The corrosion resistance, resistance to high temperatures, and workability were investigated in this case. It becomes difficult to choose among many aluminum materials that can be alternatives to each other when these features are included. The developed approach, which considers many of the features listed above and ultimately recommends to the user the most suitable aluminum material for the relevant critical part, will be used in overcoming the difficulties in this process. A material selection model is proposed in this paper for this purpose, and the decision-making model is demonstrated with examples from the aviation industry. Therefore, the developed model, which will enable the selection of the most suitable materials among alternative materials, especially for critical parts in the aviation industry, will guide professionals working in this field. For this purpose, the fuzzy TOPSIS method is used in the study, and suitable alternatives are determined. Finally, a robustness analysis is proposed to determine the most suitable aluminum material for highly uncertain situations. We apply a stability evaluation study based on process control theory in the robustness analysis.Item OMNeT plus plus Simulation Framework for Avionics Full-Duplex Switched Ethernet(Başkent Üniversitesi Mühendislik Fakültesi, 2024-04-08) Gokce, I. Peskircioglu; Ucuncu, M.; Schmidt, E. GuranAvionics Full-Duplex Switched Ethernet (AFDX) is a popular network technology for integrated modular avionics (IMA). When designing an AFDX network, it is important to fulfill the real-time communication requirements of avionic systems. To this end, simulation tools offer a low-cost solution for the performance evaluation of a given AFDX network and message set configuration at the design stage. In this paper, we develop an improved AFDX model for the widely used OMNeT++ (extensible, modular, component-based C++ simulation library and framework) network simulator. Our model exhibits high fidelity to the standard, adds detailed parameter configuration and data logging capabilities, and is compatible with the most recent OMNeT++ version. Our model is accepted by the OMNeT++ community and published as the current AFDX simulation model. Moreover, we propose a complete AFDX simulation framework by augmenting our improved OMNeT++ models with a new network configuration and analysis software tool that we call ANCAT. ANCAT enables users who lack familiarity with the OMNeT++ interface and specific file formats to provide simulation parameters in generic file formats such as.xlsx. Subsequently, ANCAT runs the simulation and generates reports for the results. We first systematically verify the correctness of our AFDX simulation framework by custom-designed experiments. Then, we investigate the practicability of our proposed framework with the performance analysis of a realistic AFDX network topology and message set. In particular, we demonstrate that our proposed framework can be efficiently used to explore the real-time capabilities and relevant features of AFDX networks, as well as provide basic guidelines for network configuration.Item Enhancing Carbon Fiber Reinforced Aluminum Laminates With Cellulose Paper Interlayers: Experimental Characterization Of Tensile, Flexural, And Interlaminar Fracture Toughness(Başkent Üniversitesi Mühendislik Fakültesi, 2024-03-30) Ustun, Tugay; Guler, Ebru SaralogluThe mechanical properties of fiber metal laminates (FML) are influenced by several various factors. Interface adhesion plays a particularly crucial role in interlaminar strength. Enhancing the interlaminar strength of carbon fiber reinforced aluminum laminate (CARALL) composites present a persistent challenge due to inherent weaknesses between metal and composite elements. Therefore, this study focuses on improving the interlaminar performance of CARALL composites by introducing cellulose paper interlayer at the metal/composite interface. The cellulose paper interlayer offers the advantage of being cost-effective and sustainable. Cellulose paper-interleaved CARALL composites were fabricated by vacuum bagging method and exhibited noteworthy improvements in mechanical properties. Comparative analysis with pristine samples revealed substantial enhancements, including a 15% increase in tensile strength, a remarkable 42% improvement in flexural strength, and a significant enhancement in mode-I fracture toughness by 65%. Furthermore, the cellulose paper interleaving played a crucial role in stabilizing fracture formation at the fiber-matrix interface, with mode II fracture toughness witnessing a 3% increase. Visual examination revealed the underlying toughening processes occurring in the interfacial area. This innovative approach of interleaving laminated composites with cellulose paper emerges as a sustainable and effective strategy, demonstrating the potential to fortify and toughen the interlaminar zones of CARALL composites. [GRAPHICS]Item The Detect Consensus Report on Attention Deficit/Hyperactivity Disorder and Its Management Among Turkish Children And Adolescents (Detect: consensus report on ADHD among Turkish youth)(Başkent Üniversitesi Fen Edebiyat Fakültesi, 2024-04-07) Ogutlu, Hakan; Kutuk, Ozlem Meryem; Tufan, Ali Evren; Akay, Aynur Pekcanlar; Gundogdu, Ozlem Yildiz; Ercan, Eyup SabriAttention Deficit/Hyperactivity Disorder (ADHD) is one of the most common and heritable neurodevelopmental disorders which may last through the life-span. A consensus report on diagnosis and management of ADHD among Turkish youth was prepared previously. However, the participants as well as the management options were rather limited and developments in the past decade necessitated a revision and update of the consensus. Therefore, this review aims to summarize the consensus among Child and Adolescent Psychiatrists from Turkiye on the nature and management of pediatric ADHD. For those aims, the etiology of ADHD, diagnostic and evaluation process, epidemiology, developmental presentations, differential diagnoses and comorbidities, course/outcome and pharmacological as well as non-pharmacological management options were reviewed and suggestions for clinical practice are presented. Since ADHD is a chronic disorder with wide-ranging effects on functionality that is frequently accompanied by other mental disorders, a multidimensional therapeutic approach is recommended. However, since the disorder has neurobiological basis, pharmacotherapy represents the mainstay of treatment. Additional therapies may include psychosocial therapy, behavioral therapy, school-based therapeutic approaches, and family education. This review provides recommendations for ADHD at the national and global levels. It contains information about ADHD that will contribute to and facilitate clinicians' decision-making processes. It is advisable to consider this guideline in clinical practice.Item Generating The Level 2 Subgroup By Involutions(Başkent Üniversitesi Mühendislik Fakültesi, 2024-05-19) Altunoz, Tuelin; Monden, Naoyuki; Pamuk, Mehmetcik; Yildiz, OguzWe obtain a minimal generating set of involutions for the level 2 subgroup of the mapping class group of a closed nonorientable surface. (c) 2024 Elsevier B.V. All rights reserved.