Browsing by Scopus Q Quality "Q2"

Now showing 1 - 4 of 4
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    Development of Self-Healing Thermoplastic Composites With Reactive Thermoplastic Agent-Filled Macrocapsules
    (Wiley, 2025-05) Şahin, Eslem; Boztoprak, Yalçın; Yazıcı, Murat; 414011
    Self-healing materials, which introduce a new approach to innovative materials, can aid in the repair of polymers and composites, leading to the development of more durable and reliable products. In polymer matrix composites, healing micro- or macrocracks helps to eliminate structural defects. A reactive healing agent and curing agent distributed within the thermoplastic matrix can react at the crack site, providing repair without external intervention. Acrylic resin and polypropylene were selected for this study to evaluate the potential of healing in industrial thermoplastics. Capsules filled with a reactive agent containing 3% by weight diethylenetriamine (DETA) were embedded in the matrix. When damaged, these capsules broke, and the liquid agents seeped into the cracks through the filling voids. The reaction released immediate heat, initiated curing, and filled the damaged area. Complete curing occurred after 8 h. The energy absorption of specimens in both damaged and undamaged states was observed through compression testing. The heat generated by the agents flowing from the capsules during the compression test was monitored using a thermal camera. This study offers a new perspective on using reactive thermoplastic resins to develop self-healing composite materials.
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    Logistics connectivity, foreign investments and trade relationships in ASEAN countries
    (Emerald, 2025-12) Canbay, Şerif; Karahan-Dursun, Pınar; Şengül, Serkan; 414023; 355807
    Purpose This study examines the causal relationships among the export volume index, the liner shipping connectivity index (LSCI) and foreign direct investment (FDI, net inflows as % of GDP) for the five founding members of ASEAN–Indonesia, Malaysia, the Philippines, Singapore and Thailand–during the 2006–2021 period. Design/methodology/approach The analysis applies the panel bootstrap causality test developed by Kónya (2006), which allows for country-specific inferences without requiring cross-sectional independence or parameter homogeneity. Three models are estimated to identify the direction and nature of causal linkages among the variables. Findings The results show evidence of Granger causality from LSCI and FDI to exports in the Philippines, Singapore and Thailand, with positive estimated coefficients indicating that stronger maritime connectivity and investment inflows are associated with higher export performance. Causality also runs from exports to LSCI in Indonesia and the Philippines, suggesting that trade expansion stimulates infrastructure improvements. While FDI negatively affects LSCI in Indonesia, a positive coefficient is observed for the Philippines. In addition, LSCI Granger-causes FDI in the Philippines and Singapore, reflecting the role of maritime connectivity in attracting investment. These results highlight substantial cross-country heterogeneity in trade, logistics and investment dynamics. Research limitations/implications The analysis is limited to five ASEAN founding members and to the 2006–2021 period due to the availability of the LSCI data. Future research may extend the analysis to other ASEAN economies or incorporate additional macroeconomic factors. Practical implications The findings provide valuable insights for policymakers seeking to enhance maritime infrastructure, attract FDI and strengthen regional trade integration through improved logistic connectivity. Originality/value This study contributes to the literature by simultaneously examining the bidirectional and country-specific causal linkages among maritime connectivity, trade and investment using a robust panel bootstrap approach, offering new empirical evidence on the structural heterogeneity of ASEAN economies.
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    Patients' Expectations and Satisfaction Regarding to the Protection of Their Individual Dignity After Surgery: A Cross-Sectional Study
    (Wiley, 2025-05) Güneş, Ayşegül; Eren, Esra; Tekin, Yasemin Eda; 292320
    This study aimed to determine patients' expectations and satisfaction regarding protecting their dignity after surgery. This descriptive, cross-sectional study was conducted with 385 patients between December 2024 and February 2025. Research data was collected using the "Inpatient Dignity Scale" and socio-demographic information form. It was determined that the patient's dignity scale expectation and satisfaction total scores were 72.85 +/- 4.509 and 85.03 +/- 8.011. Accordingly, the expectation scores of the young, those with higher education levels, those whose income is lower than their expenses, those who have had surgery before, those who can perform activities of daily living those who can do it with assistance, those who can connect the head and neck are significantly stronger (p < 0.05). The satisfaction scores of the married, those with the highest and lowest education levels, those whose income is lower than their expenses, those who have had a longer hospital stay after surgery, and those who have had head and neck surgery are higher (p < 0.05). New studies should be conducted in surgical units where nursing activities to protect patient dignity are planned, and their results are evaluated.
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    The Relationship Between Climate Change Awareness, Sustainable Nutrition Behaviours and Acceptability of Alternative Protein Sources in Generation Z: A Cross-Sectional Study
    (Wiley, 2026-01) Tuna, Tuğba; Batu, Zehra; 336342
    This study investigates the relationship between climate change awareness, sustainable nutrition behaviours, and the acceptability of alternative protein sources among Generation Z university students. This cross-sectional study employed a mixed-methods approach, combining structured quantitative measures and open-ended qualitative questions in a digital survey. A total of 785 university students aged 18–29 from Türkiye participated in the study. The survey included the Behavioural Scale for Sustainable Nutrition, the Global Climate Change Awareness Scale, and the Attitudes Toward Alternative Protein Sources Questionnaire. Descriptive statistics, independent t-tests, one-way ANOVA, post hoc Tukey HSD tests, and correlation analyses (Pearson/Spearman) were conducted to examine the associations between climate change awareness, sustainable nutrition behaviours, and the acceptability of alternative protein sources, including edible mushrooms, algae, flowers, grasshoppers, crickets, and cultured meat. A statistically significant but moderate positive relationship was observed between climate change awareness and sustainable nutrition behaviours, particularly in food purchasing habits. A weaker but positive association was found for food preference, food waste reduction, and seasonal and local dietary practices. Participants reported low familiarity with alternative protein sources, with the highest acceptability for edible mushrooms (74.5%), followed by edible flowers (37.8%) and cultured meat (14.4%). While greater climate change awareness was linked to a higher willingness to consume certain alternative protein sources, this did not consistently translate into broader acceptance. These findings highlight the need for targeted awareness campaigns and educational initiatives to overcome cultural barriers and food neophobia, fostering a greater acceptance of sustainable protein sources.