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
Exploring the Causal Links between ESG, R&D, and Firm Performance: Evidence from the US Technology and Food Companies
(Institute of Geography of the Slovak Academy of Science, 2025) Boğa Şahin, Semra; Bozkurt, Gözde; Gillpatrick, Tom
This study examines the causal relationships between ESG (Environmental, Social, and Governance) compliance, R&D expenditures, and financial performance in the technology and food sectors in the US. A panel dataset from 2012 – 2021 from the Thomson Reuters database was analysed for 12 food and 18 technology companies. The findings show that there are different causal relationships between sectors. While R&D investments in the technology sector positively affect firm performance by increasing ESG compliance, firm performance in the food sector directs ESG compliance, encouraging R&D investments. The study emphasizes that sectoral differences should be considered in sustainability and R&D strategies and guides policymakers and managers to develop approaches appropriate to the dynamics of the sector.
Volumetric Three-Dimensional Evaluation of the Pharyngeal Airway After Orthognathic Surgery in Patients with Skeletal Class III Malocclusion
(Multidisciplinary Digital Publishing Institute (MDPI), 2025) Oz, Aslihan Zeynep; El, Hakan; Palomo, Juan Martin
Background: Orthognathic surgery significantly alters the dimensions of the pharyngeal airway. This study's objective was to assess alterations in the pharyngeal airway volume via cone-beam computed tomography (CBCT) after orthognathic surgery in patients with skeletal Class III malocclusion. Methods: This retrospective study analyzed CBCT images from 23 patients with skeletal Class III malocclusion (13 females, 10 males), who were categorized into two groups based on the surgical approach: double-jaw and single-jaw surgery. The double-jaw group included 13 patients who underwent bilateral sagittal split osteotomy (BSSO) and Le Fort I osteotomy, whereas the single-jaw group included of 10 patients who had underwent BSSO only. CBCT images were evaluated both before surgery and at a minimum of three months after surgery. The oropharyngeal volume (OP), nasopharyngeal volume (NP), total airway volume, posterior airway space (PAS), and the most constricted area at the base of the tongue (minAx) were measured. Statistical analyses were performed using either paired t-tests or Wilcoxon signed-rank tests depending on data normality, with a significance level set at p < 0.01. Results: In the double-jaw group, a significant volumetric increase was observed in the nasopharynx (5316 +/- 1948 mm(3) to 6064 +/- 1899 mm(3); p = 0.010) and oropharyngeal volume decreased from 17,097 +/- 5675 mm(3) to 14,290 +/- 5835 mm(3); however, this reduction was not statistically significant (p = 0.017). In contrast, the single-jaw group showed a significant reduction in oropharyngeal volume from 15,620 +/- 5040 mm(3) to 12,444 +/- 4701 mm(3) (p = 0.010), with no significant change in nasopharyngeal volume (p = 0.551). Total airway volume significantly decreased only in the single-jaw group (from 20,452 +/- 7754 mm(3) to 16,846 +/- 6529 mm(3), p = 0.010). Additionally, both groups exhibited marked decreases in PAS and minimum axial area values (all p < 0.01). Conclusions: Orthognathic surgery led to a significant volumetric increase in the nasopharynx in the double-jaw group, whereas the oropharynx volume significantly decreased only in the single-jaw group. Additionally, both surgical approaches resulted in a marked reduction in PAS and minimum axial area values, highlighting a notable impact on posterior airway dimensions.
Cross-Cultural Adaptation and Validation of the Dance Functional Outcome Survey for Turkish Dancers (DFOS-TR)
(CIENCE & MEDICINE INC, 2025) Tekin, Demet; Agopyan, Ani; Bronner, Shaw
In dance, injuries are significant factors that can bring an active dance career to an end. A patient-reported outcomes questionnaire with established validity and reliability is useful for determining and evaluating the functional status of dancers before or after injuries. However, no valid and reliable survey is available in Turkish to assess dancers' functionality levels. The objective of this study was to translate, culturally adapt, and validate the characteristics of the Turkish version of the Dance Functional Outcome Survey (DFOS-TR) in adult dancers. METHODS: The DFOS-TR underwent forward translation, reconciliation, backward translation, and thorough review by an expert committee to ensure optimal alignment with the original English DFOS. A sample of 113 dancers (55 injured and 58 healthy) voluntarily participated in the research. Construct validity was assessed by comparing DFOS-TR to SF-36 using Pearson correlations; exploratory factor analysis and internal consistency were conducted; and sensitivity was evaluated through the generation of receiver operating characteristic curves and calculation of the area under the curve (AUC). Test-retest reliability was assessed by examining 26 dancers over a 15-day period, employing intraclass correlation (ICC). Various methods were employed, including ICC, standard error of measurement (SEM), minimal detectable change at the 95% confidence interval (MDC95), and standardized response mean (SRM). DFOS-TR scores were compared using paired samples t-test and two-way repeated measures ANOVA (p<0.05). The scores of injured dancers were examined to identify any floor or ceiling effects. RESULTS: The DFOS-TR demonstrated very high test-retest reliability (ICC=0.84). Single-factor loading in exploratory factor analysis confirmed the scale's unidimensionality and high internal consistency (a=0.79), A positive moderate correlation was found between SF-36 physical component and DFOS-TR total score (r=0.44; p=0.046) and activities of daily living (ADL) subscore (r=0.58; p=0.006). Cut-off value of 85.5 for DFOS-TR total score yielded in 87.3% sensitivity and 36.2% specificity. The scale did not exhibit ceiling or floor effects among the injured dancers, indicating robust measurement properties. CONCLUSION: The DFOS-TR can be used as a reliable, internally consistent, and effective measurement tool for Turkish-speaking dancers in health as well as during and after lumbar or lower extremity injuries.
Mental Health in a Digital World: How Problematic Cell Phone Use and Personality Predict Fear of Missing Out (FoMO) in Gen Z University Students from Türkiye and the U.S.
(YERKURE TANITIM & YAYINCILIK HIZMETLERI A.S, 2025) Yüksel,Peri; Huiqiao, Hou
Objective: The authors sought to examine the association between Fear of Missing Out (FoMO), mental health, personality traits, and social media use among Turkish and U.S. university students, belonging to Generation Z (Gen Z), born between 1997 and 2012, a cohort deeply immersed in technology and social media from an early age. Methods: The present online survey study included 637 university students aged 18-25 (20.09% male, 78.65% female, 1.26% other) from T & uuml;rkiye (86.03%) and the US (14.97%). Participants completed 19 sociodemographic questions, a 17-item FoMO Scale, and a 44-item Personality Inventory. The study analyzed the relationship between FoMO, mental health, personality traits, and social media use across different platforms. Results: Findings revealed that frequent cell phone use and higher FoMO scores were significantly associated with problematic social media use. TikTok users reported higher FoMO compared to non-users. Additionally, there was a positive correlation between the number of social media platforms used and FoMO. Social media use driven by boredom and passive observation further increased FoMO. Associations between FoMO and personality traits highlighted the role of individual differences in social media behaviors. Conclusion: The study highlights the need for tailored interventions that address both social media usage patterns and personality traits to reduce the negative impact of FoMO on mental health. While Gen Z are digital natives, they need to become digital experts to navigate the mental health challenges exacerbated by curated content and the prevalence of FoMO on social media. Universities play a crucial role in raising awareness and supporting students in managing these psychological pressures by promoting balanced digital behaviors. A deeper understanding of the interplay between digital behaviors, personality traits, and cultural contexts can inform future interventions aimed at reducing FoMO and enhancing the well-being of young people in an increasingly interconnected world.
The role of preoperative ureteral diameter measurements in predicting difficult access during retrograde ıntrarenal surgery: a retrospective analysis of 234 patients
(SPRINGER, 2025) Çakıroğlu, Basri; Avcı, Ali Egemen; Uyanık, Bekir Sami; Ekin, Elif Evrim
Retrograde intrarenal surgery (RIRS) is a minimally invasive procedure used for the management of renal and ureteral stones. However, successful placement of a ureteral access sheath (UAS) remains a critical challenge, particularly in patients with narrow ureters. Preoperative measurement of ureteral diameter via computed tomography (CT) may help predict access difficulties and optimize surgical planning. This study aimed to evaluate the role of preoperative ureteral diameter measurements (distal, iliac, and upper ureters) in predicting difficult UAS placement during RIRS. A retrospective analysis was conducted on 234 patients who underwent RIRS for kidney stones. Ureteral diameters were measured at three anatomical levels using preoperative CT. Patient demographics, stone size, operative time, and surgical outcomes were recorded. Difficult access was defined as unsuccessful initial UAS placement requiring additional interventions such as guidewire manipulation, balloon dilation, or selection of a smaller sheath. Patients with smaller ureteral diameters at all three measured levels had a significantly higher incidence of difficult UAS placement (p < 0.05). Multivariate analysis confirmed ureteral diameter as an independent predictor of difficult access. Additionally, previous stone-related interventions and patient demographics showed significant associations with ureteral diameter, further influencing surgical outcomes. Preoperative ureteral diameter measurement via CT provides valuable predictive insights into access challenges during RIRS. Routine assessment of ureteral diameter can enhance surgical planning, improve procedural efficiency, and reduce perioperative complications.
