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İstanbul Kent Üniversitesi Research and Academic Performance System

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Effect of mechanical polishing and 35% hydrogen peroxide application on DIAGNOdent measurements in stained occlusal fissures: A randomized split-mouth clinical study
(Springer Nature, 2026)
Loça, Anıl
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Erçin, Özlem
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Kopuz, Dilan
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Kanar, Özlem
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Korkut, Bora
Background DIAGNOdent laser fluorescence measurements may be confounded by extrinsic staining in occlusal fissures, and the effect of common surface-preparation protocols on these readings remains unclear. The aim of this study was to compare the effects of mechanical polishing and 35% hydrogen peroxide application on DIAGNOdent Pen measurements in stained occlusal fissures. Methods In this randomized split-mouth clinical study, 126 posterior teeth from 24 participants were evaluated. Opposing jaws received either mechanical polishing with a fluoride-free prophylaxis paste for 30 s or 35% hydrogen peroxide gel for 15 min. DIAGNOdent scores were recorded at baseline, after air–water spray cleaning and drying, and after the assigned procedure. Digital bite-wing radiographs obtained at baseline as a complementary diagnostic assessment. Data were analyzed using linear mixed-effects models and Wilcoxon signed-rank tests. Results Air–water spray cleaning and drying did not significantly change DIAGNOdent values in either group (bleaching: p = 0.355; polishing: p = 0.516). Post-procedure scores increased significantly after bleaching (p = 0.023) and polishing (p < 0.001). The mean score change was significantly greater after polishing than bleaching (18.4 ± 26.0 vs. 4.6 ± 19.3; p < 0.001).Conclusions Surface-preparation protocols significantly influence DIAGNOdent readings in stained occlusal fissures. Post-polishing readings should be interpreted with caution due to potential paste retention and measurement artifacts, whereas 35% hydrogen peroxide application induces a more limited change without mechanical surface alteration. Standardized surface-preparation protocols and interpretation alongside clinical and radiographic findings are recommended.
Oto sanayi sitesinde çalışan işçilerin ruh sağlığını geliştirme durumları
(Dokuz Eylül Üniversitesi, 2026)
Şentürk Kurucan, Tuğba
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Yurt, Seher
Giriş: Ruh sağlığının geliştirilmesi, kişisel psikolojik dayanıklılık ve stresle baş etme becerilerini güçlendirmenin yanı sıra, sosyal ilişkileri, yaşam kalitesini iyileştirerek iş verimliliği ve uyumunu artıran temel bir unsurdur. Amaç: Bu çalışma, oto sanayi sitesinde çalışan işçilerin ruh sağlığını geliştirme durumlarını belirlemek amacıyla yürütülmüştür. Yöntem: Tanımlayıcı tipte yapılan bu çalışma, Haziran 2024 ve Ağustos 2024 tarihleri arasında İstanbul’da bir oto sanayi sitesinde çalışan 332 işçi ile yürütülmüştür. Araştırmanın verileri “Kişisel Bilgi Formu” ve “Ruh Sağlığının Geliştirilmesi Ölçeği” kullanılarak toplanmıştır. Araştırmada elde edilen veriler, SPSS 22.0 istatistik programı aracılığıyla değerlendirilmiştir ve frekans, yüzde, ortalama, standart sapma, bağımsız gruplar t-testi, tek yönlü varyans analizi (Anova) ve post hoc (Tukey, LSD) analizlerinden faydalanılmıştır. Bulgular: Ruh Sağlığını Geliştirme Ölçeği toplam puanı ortalaması 191.858±28.428 bulundu. Katılımcıların değerler (18.28±2.73), arkadaşlık ilişkileri (19.58±4.76), iletişim (23±5.39) ve kişisel gelişim (25.91±4.10) alt boyutlarından daha yüksek puanlar alındığı belirlendi. Ruh sağlığının geliştirilmesi toplam ve alt boyut puanlarının sosyodemografik değişkenlere göre istatistiksel olarak farklılaştığı belirlendi. Araştırmada, meslekte daha uzun süre deneyime sahip, mesleki eğitim almış, sigara kullanmayan, psikolojik destek almayan ve herhangi bir tedavi görmeyen, sağlığını iyi olarak değerlendiren ve daha ileri yaş gruplarındaki bireylerin ruh sağlığını geliştirme düzeylerinin daha yüksek olduğu belirlendi (p<0.05).Sonuç: Bu çalışmada, değerler, arkadaşlık ilişkileri, iletişim ve kişisel gelişim alt boyutları öne çıkmıştır. Ruh sağlığını geliştirme düzeyinin; ileri yaş, mesleki deneyim ve eğitim, sigara kullanmama ve sağlığını iyi algılama ile anlamlı biçimde ilişkili olduğu belirlenmiştir (p<0.05). Konu ile ilgili farklı bölge ve örneklem gruplarıyla araştırma yapılabilir. Ruh sağlığını geliştirmeye yönelik girişimsel araştırmalar planlanabilir.
A transport-centric approach to overcoming stagnation in Türkiye's EU accession through complex interdependence theory
(Gaziantep Üniversitesi, 2026)
Koray, Murat
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Keskin, M. Hakan
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Çomak, Hasret
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Özel, Mesut
Türkiye’s accession process to the European Union has effectively entered a prolonged phase of stagnation. As of 2025, two decades after the launch of full membership negotiations, the process has lost much of its political momentum. This deadlock has been shaped by multiple political, legal, institutional, social, cultural, and economic factors. One of the most persistent obstacles concerns Türkiye’s non-recognition of the Republic of Cyprus and the continuation of Cyprus-related transport restrictions. This article offers a transport-centred and analytically limited approach to this specific institutional blockage within the accession framework. Methodologically, the study employs qualitative document analysis and comparative case analysis. It examines European Commission Türkiye Reports, Council decisions, transport policy documents, the Ankara Agreement and its Additional Protocol, maritime connectivity indicators, and selected comparative cases. Drawing on complex interdependence theory, the article argues that Cyprus-related transport restrictions should not be understood merely as a diplomatic recognition issue, but also as a functional problem involving ports, vessels, customs procedures, EU institutions, trade actors, and maritime connectivity networks. The article also draws analytical parallels with Taiwan–China, Israel–Arab states, and Kosovo–EU member state cases, where commercial or institutional engagement has continued under contested or limited recognition. The study does not claim that transport policy can resolve the Cyprus dispute or guarantee Türkiye’s EU accession. Rather, it argues that a narrowly framed technical-commercial opening could reduce one identifiable transport-related impediment and create a limited functional space for renewed accession-related engagement.
Strategic thinking, entrepreneurial inclination, and career planning among sports science students
(Campus Educa Sportis, 2026)
Demir, Bülent
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Başaran, Reyhan
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Korkmaz, Murat
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Yücel, Ali Serdar
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Gümüşdağ, Hayrettin
This study examines the multidimensional relationships between strategic thinking ability, entrepreneurial inclination, and career development among sports science students. A cross sectional correlational design was used. The sample included 905 students enrolled in sports science programs. The study was conducted among sports science students in Türkiye. Data were collected with a 64-item, five-point Likert instrument covering six constructs. This 64 item assessment tool was originally developed by the authors as part of this study. Exploratory factor analysis and confirmatory factor analysis were conducted on separate subsamples. Structural equation modeling was used to assess direct and indirect associations. Indirect effects were tested with 5,000 bootstrap samples. Subscale means ranged from 3.07 to 3.24, and Cronbach's alpha coefficients ranged from .864 to .928. For the six-factor measurement model, the following values were obtained: χ²/df = 1.117, CFI = .982, TLI = .981, RMSEA = .016, and SRMR = .036. The proportions of variance explained by the model are 13.8% for OPSA, 18.8% for IBPCA, 27.4% for EI, 16.9% for CP, and 20.0% for SCDI. Strategic thinking ability was positively associated with opportunity perception and strategic awareness. It was also associated with innovative behavior and a proactive career attitude. The direct path to entrepreneurial inclination was not statistically significant. However, the indirect paths through the proposed mediators were significant. Strategic thinking ability had a direct association with career planning. It also showed direct and indirect associations with strategic career development intention in the sports industry. The findings suggest that strategic thinking does not translate automatically into entrepreneurial inclination. Its contribution becomes stronger when students recognize opportunities and adopt proactive, innovative career behaviors. Sports science programs should combine strategic thinking with opportunity analysis, applied entrepreneurship, career planning, and industry-based experience.
The relationships among workplace bullying, organizational commitment, and quiet quitting among physical education professionals
(Campus Educa Sportis, 2026)
Korkmaz, Murat
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Demir, Bülent
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Başaran, Reyhan
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Yücel, Ali Serdar
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Kuyucu, Mihalis Michael
Workplace bullying is a significant organizational risk for sports education institutions. It can deplete employees’ psychological resources and weaken their organizational commitment, which may lead to an increase in quiet quitting. This study examined the levels of workplace bullying, organizational commitment, and quiet quitting among sports education employees. Additionally, the measurement properties of these three constructs and the relationships among them were evaluated. A total of 550 participants took part in this cross-sectional and correlational study. Data were collected using a 39-item, five-point Likert-type scale. There were 13 items in each dimension. Internal consistency was examined using Cronbach’s alpha and McDonald’s omega coefficients. Confirmatory factor analysis based on weighted least squares estimation was conducted to assess construct validity. The mean scores were 2.92 ± 0.71 for workplace bullying, 3.17 ± 0.60 for organizational commitment, and 2.26 ± 0.67 for quiet quitting. The alpha coefficients ranged from 0.913 to 0.932. The three-factor model showed an excellent fit (χ²/df = 1.037; CFI = 0.998; TLI = 0.997; RMSEA = 0.008; SRMR = 0.029). There is a positive relationship between workplace bullying and quiet quitting (r = 0.602; p < 0.001). The relationship between workplace bullying and organizational commitment is negative (r = −0.481; p < 0.001). A negative relationship was also found between organizational commitment and quiet quitting (r = −0.461; p < 0.001). All three scores varied by type of organization. Workers at sports clubs or educational centers experience higher levels of workplace bullying and quiet quitting. Organizational commitment, however, is lower among them. Only the quiet quitting score differed based on length of service. The findings indicate that quiet quitting is not merely an individual choice. Organizational conditions also play a role in this behavior.