İstanbul Galata Üniversitesi Kurumsal Akademik Arşivi
DSpace@Galata, İstanbul Galata 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 telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Green entrepreneurship in the context of environmental changes, cultural dynamics and capital forms: A research on European Green Capitals
(Yildiz Technical University, 2026) Habip, Elif; Doğan, Ebru
This study investigates how green entrepreneurship is shaped by environmental changes, cultural dynamics, and forms of capital, focusing on their impact on entrepreneurs in a city designated as a "green city" by the European Green Capital Award. Using a qualitative research approach, data were collected through in-depth interviews and observations with green entrepreneurs in Essen, Germany. The data were analyzed using MAXQDA 2022. Findings reveal that the city's green status significantly influences entrepreneurs' decisions to adopt green business practices, with environmental awareness playing a key role. Green entrepreneurs not only recognize environmental changes but also embrace the sustainability culture of their city. Additionally, specific forms of capital contribute to their business success. These results offer recommendations for entrepreneurs, policymakers, and society to support and promote green entrepreneurship
INTEGRATING MULTI-CRITERIA METHODOLOGY WITH SYMBOLIC REGRESSION ON LOAN MODELLING IN BANKING SECTOR
(Faculty of Organizational Sciences, 2026) Bumin, Mete; Özçalıcı, Mehmet; Ertuğrul, Ayşegül
Abstract Forecasting loans accurately is essential for the banking sector as it underpins effective risk management, capital allocation, and portfolio optimization. This study aims to model loans in the Turkish banking sector by integrating symbolic regression with multi-criteria decision-making methodologies. Monthly data from January 2004 to September 2024, derived from banks’ financial statements, are utilized for the analysis. The optimal parameter configuration for symbolic regression is determined using the TODIM (an acronym in Portuguese for Interative Multi-criteria Decision Making) methodology. The forecasting performance of symbolic regression is evaluated against established models, including Autoregressive Integrated Moving Average (ARIMA), Gaussian Process Regression (GPR), Support Vector Machines (SVM), Neural Networks (NN), Regression Trees (RT), and Long Short-Term Memory (LSTM) network models. The proposed approach is applied across private, public, and foreign banks, as well as the overall banking sector. A significant finding of this study is the identification of a robust relationship between loans and two critical variables: assets and deposits. These results underscore the Corresponding author importance of strengthening deposit mobilization strategies and enhancing asset utilization to effectively grow banks’ loan portfolios. © (2026), (Faculty of Organizational Sciences, University of Belgrade). All right reserved.
Factors Affecting the Acceptance of Mobile Technologies in SMEs: Evidence from Top Management Perspectives
(University of Zielona Góra, 2025) Güntürkün, Barış; Tatlı, Hasan Sadık
Research background and purpose: The research aims to determine the factors affecting the adoption and use of mobile technologies by top managers. The research sample consists of top managers in SMEs. Design/methodology/approach: Data were obtained from SME managers in Turkey. Within the scope of the research, 204 survey data were collected from top managers in SMEs. SmartPLS 3 were used to analyze the data. Findings: It has been determined that factors such as usefulness, social impact, and self-efficacy positively affect the intention to use mobile technologies. In addition, behavioral intention had a significant and strong effect on actual usage. It has been determined that the intention to use mobile technologies has a mediating role in the effect of factors on actual usage for mobile usage, social impact and technology self-efficacy. According to the findings, hedonic and mobile ease of use did not affect the behavioral intention of actual use, either directly or indirectly. Value added and limitations: The research results provide important insights into the factors that are crucial for upper-level SME managers to utilize mobile technologies. The originality of this research lies in its integrated approach, combining the perspectives of top managers of Turkish SMEs with the UTAUT theoretical framework to explain their behavioral intentions toward adopting mobile technologies for business purposes. Therefore, the findings uniquely represent the adoption intentions of SME executives in Turkey.
Investigation of factors influencing patients’ preferences for traveling to Türkiye for dental tourism: The case of a private hospital
(2026) Keleş, Zeynep Hale; Ertuğrul, Mustafa Orkun; Tunçer, Jale
Aim: This study aimed to investigate why dental tourists choose Türkiye for their dental clinic visits; specifically looking at a private hospital in Istanbul. Methods: This cross-sectional study employed a face-to-face survey method conducted through an interpreter with foreign patients who applied to the dental clinic of a private hospital in Istanbul (n = 52) between March 24; 2023; and February 29; 2024. The questionnaire comprised 29 inquiries aimed at collecting the participants’ demographic characteristics; elucidating their motivations for selecting Türkiye as a destination for dental care; and describing their experiences throughout the treatment process. The inquiries were presented in single-choice and multiple-choice formats. Results: Approximately 94% of dental tourists chose Türkiye for its price advantage; 86% for shorter treatment times; 82% for trust in the dentist; 78% for easy appointment scheduling; 60% for advanced technology; and 52% for low travel costs. African patients cited high costs; poor technology; appointment challenges; inadequate education; and hygiene issues as reasons for not seeking treatment in their home countries. Furthermore; European visitors cited high prices and difficulty obtaining appointments as their primary concerns; while all Middle Eastern respondents reported that obtaining an appointment was difficult. Although 77.4% of dental tourists accessed this hospital through an agency; 53.8% communicated with previous visitors to Türkiye; and 84.6% conducted research via social media. Conclusions: Within its limitations; the study concluded that affordable treatment costs; confidence in the experience of dental professionals; short treatment durations; and overall accessibility were the primary factors influencing patients’ decision to choose Türkiye for dental tourism. The reasons African patients did not seek dental care in their home country included inadequate training of dentists; unavailability of specific treatments; and poor hygiene. Travel agencies; word of mouth; and social media influenced dental tourists’ decision-making processes.
Color matching and metameric behavior of composite resins applied on anodized titanium surfaces: an in vitro spectrophotometric study
(2026) Davut, Umur; Özyılmaz, Özge Doğanay; Özyılmaz, Özgün Yusuf
Background The aim of this study was to evaluate the color matching and metameric behavior of two different composite resins applied to titanium surfaces anodized to yellow and pink colors. The study aimed to determine the effects of anodization color and composite resin type on color performance in hybrid prosthesis and screw access hole closure applications. Materials and methods A total of 72 Grade 5 titanium discs (10 mm diameter × 2 mm thickness) were allocated to three anodization conditions: nonanodized/gray (0 V, n = 24), yellow (55 V, n = 24), and pink (80 V, n = 24). Each anodization group was subdivided into two subgroups: 3 M Filtek Z250 (microhybrid) and Tokuyama Estelite Sigma Quick (supra-nano hybrid) composite resins (A2 shade, 2 mm thickness; n = 12 per subgroup). Gray titanium + composite specimens were used as the reference for ΔE₀₀ calculations; yellow and pink anodization groups constituted the experimental groups. Color measurements were performed using a spectrophotometer (Konica Minolta CM-3700 A) under four light sources (D65, D50, incandescent A, and F11). Data were analyzed using mixed-design repeated-measures ANOVA, Bonferroni post hoc test, and independent samples t-test (α = 0.05). Results Anodization color (η² = 0.941) and composite type (η² = 0.952) demonstrated strong effects on ΔE₀₀ values (both p < 0.001). Light source showed statistically significant but clinically negligible effect (η² = 0.521, mean difference < 0.1 ΔE₀₀). Pink anodization exhibited higher color differences than yellow (2.84–2.99 vs. 1.53–1.62), and Tokuyama composite higher than 3 M (2.89–3.12 vs. 1.41–1.54) (both p < 0.001). Yellow+3 M combination showed lowest values (0.91–0.97), while Pink+Tokuyama showed highest (3.68–3.97). Metamerism index remained minimal (MI < 0.21). Conclusions Careful material selection is essential for optimal esthetics in anodized titanium-composite systems. Yellow anodization combined with a microhybrid composite demonstrated the most favorable color matching performance under
