İHÜ Araştırma ve Akademik Performans Sistemi
DSpace@İHÜ, İbn Haldun Üniversitesi’nin bilimsel araştırma ve akademik performansını izleme, analiz etme ve raporlama süreçlerini tek çatı altında buluşturan bütünleşik bilgi sistemidir.
İndekslere Göre Dağılım
Yıllara Göre Dağılım
Türlere Göre Dağılım
Güncel Gönderiler
Determinants of ancillary revenue strategies and passenger willingness to pay: Evidence from the airline industry
(Busssecon International Academy, 2025) Şahin, Merve; Süsleyici, Kahraman; Zaim, Selim; Harcar, Talha; Yönetim Bilimleri Fakültesi, İşletme Bölümü
The airline industry faces persistent profitability pressure stemming from high fixed costs, intense competition, and macroeconomic volatility. Since the entry of low-cost carriers (LCCs), ancillary revenue—defined as income generated from services and products supplementary to the core ticket— has evolved from a peripheral activity into a strategic financial pillar for both full-service and lowcost airlines. This study investigates the determinants of passenger willingness to pay (WTP) for à la carte ancillary services and identifies behavioural and demographic profiles that predict purchase frequency. Using a survey of 254 air travellers and a multi-method statistical approach (Chi-square tests, Mann–Whitney U tests, and Kruskal–Wallis with Bonferroni-corrected pairwise comparisons), six hypotheses are tested. The results demonstrate that (i) passengers familiar with à la carte services allocate significantly larger travel budgets to such services (p < .05); (ii) frequent travellers (>5 flights/year) are significantly more likely to purchase à la carte services (χ² = 8.44, p < .01); (iii) frequent-flyer programme (FFP) members purchase ancillary services at substantially higher rates (χ² = 9.70, p < .01); and (iv) contrary to common managerial intuition, short-haul passengers purchase à la carte services more frequently than long-haul passengers (χ² = 4.51, p < .05). Wi-Fi access is valued across all age cohorts without statistically significant differences. The findings extend the revenue management literature by empirically validating familiarity and loyalty-programme membership as the strongest behavioural predictors of à la carte WTP, and offer actionable guidance for targeted personalisation, segmentation, and dynamic pricing strategies. Implications for machine-learningdriven ancillary recommendation systems are also discussed in light of recent advances in offer management (2022–2025).
Aviation 4.0: The impacts of digital transformation on the aviation industry: Evidence from maintenance, repair and overhaul operations
(Busssecon International Academy, 2025) Şahin, Mehmet Emin; Şahin, Merve; Khan, Umaal; Yönetim Bilimleri Fakültesi, İşletme Bölümü
The integration of Big Data, Artificial Intelligence (AI), Machine Learning, the Internet of Things, Cloud Computing and Cybersecurity into aviation – is reshaping how airlines and Maintenance, Repair and Overhaul (MRO) organisations create value, yet evidence on the gap between digital potential and at-scale implementation remains fragmented. This study examines how Aviation 4.0 technologies affect aviation operations, with a particular focus on MRO. A qualitative, mixed-methods design combines a systematic literature review, secondary evidence from an industry MRO digital survey, five semi-structured expert interviews (sales, data science, MRO operations, R&D innovation, and technology-provider management), and two technical case studies (neural networks for aircraft retirement and an AI-based digital twin for a Power Electronics Cooling System). Findings reveal that predictive maintenance is the dominant digital priority (prioritised by 56% of respondents), yet only 6% of MROs have scaled digital and analytics across the enterprise; over 80% cite data limitations and more than 70% cite organisational resistance as barriers. Field implementations in a focal MRO produced substantial measurable value, including $4.2M annual savings from an in-house planning platform and $6M additional revenue from an integrated quote-to-contract system. The study triangulates concept, practice and market evidence in a single crosswalk, clarifying where the Aviation 4.0 promise has materialised and where the principal barriers persist. Practically, this study provides MRO executives and policymakers with an evidence-based roadmap mapping conceptual potentials to realised implementations.
Examining the influence of situational factors on reappraisal efficiency in adults: An exploratory study
(Bilişsel Davranışçı Psikoterapiler Derneği, 2026) Söğüt Kahramanlar, Meryem; Uysal, Burcu; Altan Atalay, Ayşe; İnsan ve Toplum Bilimleri Fakültesi, Psikoloji Bölümü
Cognitive reappraisal is an adaptive emotion regulation strategy that involves altering the underlying appraisals that produce negative emotions. However, gaps remain in identifying its subtypes within a coherent theoretical model and in understanding how their association with negative emotional intensity varies by context. To address these issues, the reAppraisal model recently introduced two mechanisms: reconstrual and repurposing. This study examined how specific appraisal dimensions predict sadness and anxiety and how reconstrual and repurposing relate to these emotions under low and high perceived control. A total of 120 individuals (109 women) aged 18–30 (M=23.98) were asked to recall sadness- and anxiety-related events and reported changes in their thinking from the time of the event to the present. Participants rated eight different emotions, appraisal dimensions, and perceived control. Regression analyses revealed that sadness and anxiety were associated with different appraisal dimensions. Repurposing was used more frequently for sadness and reconstrual for anxiety. analysis of variance (ANOVA) revealed that reappraisal users reported lower distress than non-users (F [2, 92]=13.825, p0.05). This study improves our understanding of theory-based reappraisal strategies and suggests that their associations with emotional experience may vary across situational contexts.
Cholera in the time of the plague: Ottoman medical thought between Gevrekzâde (1795) and Behçet Efendi (1831)
(Ankara Bilim Üniversitesi, 2026) Hossain, Mohammad
This study examines Ottoman medical awareness and institutional responses to epidemic diseases during the critical transition from the long-standing threat of bubonic plague (taun) to the emergence of cholera (illet-i-cedide) between 1795 and 1831. It does so by comparing two medical treatises compiled during the late eighteenth and early nineteenth century - Gevrekzâde Hâfız Hasan Efendi’s 1795 plague treatise translation with Mustafa Behçet Efendi’s 1831 Kolera Risalesi. Through a comparison of the two texts, the paper challenges historiographical narratives of medical "decline" and sharp "breaks" between traditional practices and modern state-led reforms. Instead, it highlights a process of internal medicalization and gradual transformation within Ottoman science,. Both primary texts operate within the framework of Galenic humoral pathology while selectively integrating European Tıbb-ı Cedid (New Medicine) elements, such as chemical recipes for the plague and clinical observations for cholera. Analysis reveals significant continuities in preventive strategies, including air purification through fumigation, strict dietary restrictions, and the psychological management of fear. However, treatments diverged due to disease specificity; cholera’s extreme rapidity demanded immediate intervention within hours, compared to the slightly longer window available for plague treatments. The study underscores the flexibility of Ottoman medical thought in adapting to new disease profiles through socio-medical practices. Ultimately, while the humoral therapeutic responses often proved ineffective against cholera's rapid onset, the disease served as the primary catalyst for the Ottoman Empire to institutionalize modern quarantine systems starting in 1831. This period represents a paradigmatic shift where scientific continuity and adaptation fueled the creation of comprehensive nineteenth-century public health policies.
PS105 CBT via videoconferencing for youths in COVID era: Outcomes on anxiety and depression symptoms
(Serbian Association for Cognitive and Behavioural Therapies, 2024) Tepedelen, Mehmed Seyda; Uysal, Burcu; İnsan ve Toplum Bilimleri Fakültesi, Psikoloji Bölümü
The purpose of this study was to determine how well online CBT anxiety and depression management psychoeduca-tion programs contribute to reducing the COVID-19 pandemic’s detrimental psychological effects on Turkish children between the ages of 14 and 20. Method This study evaluated the impact of online Cognitive Behavioural Therapy (CBT)-based anxiety and depression man-agement psychoeducation programs on mental health and coping skills in youth ages 14–20 by using a within sub-ject pretest-posttest methodology. To lower the possibility of dropout rates, a total of 4 anxiety psychoeducation and 2 depression psychoeducation groups were created. Each group was arranged based on the participants’ after-school schedules. Out of the two depression psychoeducation groups, 15 attended the 4 sessions, while the remaining 28 attended the first session. Furthermore, of the 4 anxiety psychoeducation groups, 50 attended the initial session, and only 17 finished all four. Every session was conducted using Zoom and lasted approximately 90 minutes. To evaluate the effectiveness of the psychoeducational program, the Revised Child Anxiety Depression Scale, KidCope, and the Demographic Information Form were given both before and after the program. Results In the anxiety psychoeducation group, adaptive coping strategies went up (T = 55.00, z = 2.87, p = .004, r = .49), avoid-ant coping strategies went down (T = 18.00, z = −1.95, p= .050, r = −.33) and anxiety scores went down (T = 30.00, z = −2.20, p = .028, r = −.37). The depression scores and maladaptive coping strategies did not show a significant difference (p > .05). The depression psychoeducation group exhibited For the depression psychoeducation group, a significant decrease in depression scores was found (T = 25.00, z = −1.99, p = .046, r = −.36). Anxiety scores and coping skills showed no changes (p > .05). Conclusion and Discussion Following the online CBT anxiety management psychoeducation program, the results show a large reduction in anx-iety levels, a major decrease in avoiding circumstances that cause anxiety, and a significant increase in coping skills. Participants in this psychoeducation program showed a substantial decline in depression levels. This study contrib-utes to the body of literature suggesting that short psychoeducation programs could be more easily implemented in a variety of contexts, such as schools, counseling centers, virtual settings, and hospitals, saving time and money. Given the study’s limitations (e.g., no control group, high attrition), these results should be interpreted cautiously; however, they do indicate that psychological prevention or intervention programs might be helpful for young people who are unable to attend school due to physical limitations or who are unable to interact in person with social support net-works. Although efforts were made to create a dynamic setting for participants, there was little opportunity for both individual and group contact and involvement. Future research that incorporates active participation programs may therefore be taken into consideration. Furthermore, a control group and follow-up test would strengthen the study’s methodological design.
