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The double-edged sword of technology: Investigating technostress and techno-eustress in academic burnout through digital literacy, internet self-efficacy, and cognitive flexibility
No full textThe swift advancement of technology in educational contexts introduces a range of challenges alongside significant benefits. Technostress and techno-eustress have been identified as significant determinants of academic achievement in higher education, influencing students’ well-being, productivity, and levels of burnout. However, there is limited research on how psychological mechanisms play a mediating role in the relationship between technostress, techno-eustress, and academic burnout. To fill this gap, two serial mediation models with three mediators were proposed to explore the associations among technostress, techno-eustress, digital literacy, internet self-efficacy, cognitive flexibility, and academic burnout in a random sample of university students from different education faculties in Türkiye (N = 677). The total effect of technostress on academic burnout was significant. This first model, with an additional three mediators, accounted for 16 % of the explained variance in academic burnout, and then 5 % without mediators. In the second model, the total effect of techno-eustress on academic burnout was nonsignificant (p = 0.602), while the direct effect had a small impact (p = 0.029). However, the total indirect effect of techno-eustress on academic burnout was significant and serially mediated by digital literacy, internet self-efficacy, and cognitive flexibility, accounting for 13 % of the explained variance. Triple serial mediation analyses indicated that digital literacy enhances internet self-efficacy, which in turn improves cognitive flexibility. This sequence ultimately promotes techno-eustress and mitigates technostress, resulting in a reduction of academic burnout. Focusing on these mediators as protective resources against technostress may enhance psychological and behavioral outcomes in higher education students
Thermal annealing and silver doping in pyridinedicarboxylate containing metal-organic framework thin films: Structural and optical effects
No full textControlling the optical and structural properties of metal-organic frameworks (MOFs), which have emerged as highly promising materials for a variety of applications in recent decades, is a challenging task that may increase their application possibilities. Thus, we examined the impact of thermal annealing at temperatures between 100 °C and 400 °C, along with silver (Ag) and silver nanoparticle (AgNP) doping, on the optical and structural characteristics of MOF thin films. For this aim, we prepared 2,5-pyridinedicarboxylate-containing metal-organic framework (UiO-66-PDC) and converted it to Ag+ (UiO-66-PDC-Ag) and AgNP (UiO-66-PDC-AgNP) containing MOFs. Afterwards, we prepared thin films of these MOFs using the spin coating technique. The SEM images showed a decrease in the grain sizes of UiO-66-PDC thin film and a disruption of the uniform structure with increasing annealing temperature. The average reflection values of UiO-66-PDC thin films decreased from 31.58% (at 100 °C) to 23.85% (at 400 °C). In addition, the band gap values calculated by the Tauc method are 2.85 eV, 2.77 eV, 2.62 eV, and 2.58 eV at 100 °C, 200 °C, 300 °C, and 400 °C for UiO-66-PDC, respectively. The band gap values at 100 °C were determined as 2.62 eV for the UiO-66-PDC-Ag film and 2.05 eV for the UiO-66-PDC-AgNP film. Consequently, Ag and AgNP dopants had an adverse effect on the optical properties of MOF thin films. However, lower band gaps were observed, which is crucial for catalytic processes
Çayın Bitkisel Özellikleri ve Yetişme Koşulları
No full textÇay Tarımı Dersi 2. Hafta Ders Notu Konusu : Çayın Bitkisel Özellikleri ve Yetişme Koşullar
Se–Hg balance and seasonal trends in metal(oid) accumulation in red mullet (Mullus barbatus) from the southeastern Black Sea: Implications for human health
No full textThis study investigates seasonal variations in metal(oid) concentrations in red mullets from the southeastern Black Sea and evaluates the related health risks from their consumption. Fifteen metal(oid)s were analyzed, and a comprehensive risk assessment was performed using various indices, including Se/Hg molar ratios, metal pollution index (MPI), estimated daily intake (EDI), estimated weekly intake (EWI), provisional tolerable weekly intake (PTWI), target hazard quotient (THQ), hazard index (HI), and carcinogenic risk index (CRI). Statistically significant seasonal differences (p < 0.05) were observed in the concentrations of most metal(oid)s. The Se/Hg molar ratios consistently exceeded the protective threshold of 1.0, while positive HBVSe values indicated a favorable selenium status that could help mitigate mercury toxicity. MPI values remained below 2.0 across all seasons, suggesting low environmental contamination levels. The calculated EDI, EWI, THQ, and HI values for all metal(oid)s fell within established safety limits, indicating no significant noncarcinogenic health risk. However, CRI values for arsenic slightly exceeded the acceptable threshold during spring and winter, indicating a potential carcinogenic risk during these periods. Given its benthic feeding habits and widespread distribution, red mullet serves as a reliable bioindicator species for monitoring environmental metal(oid) contamination in coastal ecosystems. These results highlight the importance of seasonal monitoring in seafood safety assessments and the necessity for region-specific regulatory frameworks. Overall, red mullet from the southeastern Black Sea can be considered a safe and nutritionally beneficial dietary component, although periodic increases in arsenic concentrations require ongoing surveillance
Development of quasi-flexible solid polymer blend electrolytes and boron carbide reinforced tea waste electrodes for supercapacitors
No full textThis study aims to create a prototype supercapacitor (SC) using free-standing-solid polymer electrolytes and tea waste (TW) doped boron carbide (B4C) electrodes. Quasi-solid polymer electrolyte (QSPE) films are made using a solution-casting approach, with poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and polymethyl methacrylate (PMMA) as host polymers and potassium oxide (KOH) salt as an ion source. PVDF-HFP: PMMA (80:20 wt%) + 30 wt% KOH showed a maximal ion conductivity of 3.63 ± 0.18 × 10−4 S cm−1 and a relative permittivity of 31.48 × 103 at 105 Hz at ambient temperature. The linear speed voltammetry (LSV) test measurements demonstrate that the enhanced solid polymer electrolyte (SPE) sample can endure breakdown up to 1.85 V. The study utilized TW: B4C (95:05 wt%) activated electrode material for an SC device embedded with the highly conductive blend electrolyte film. The galvanostatic charge/discharge (GCD) method revealed the charge/discharge behavior of an ideal SC indicating a low Faradic process and equivalent series resistance (ESR) value for the capacitor with a coulombic efficiency (η) of 100 %. The GCD data reveals that the SC's specific capacitance (Csp) was 42.30 F g−1, and the calculated value of energy density (Es) and power density (Pd) was 21.15 Wh. g−1 and 69.21 × 103 Wg−1 at 5 mA g−1 respectively. Cyclic voltammetry (CV) aids in studying the capacity behavior of the electrical double-layer capacitor (EDLC), revealing no redox peaks over a potential range of −1 to +1V and Csp was 50.72 F g−1. The Csp of 56.67 F g−1 was obtained using the Impedance data recorded over a range of frequency 0.01–1 MHz
Factors affecting behaviors during complementary feeding in infants and children aged 6-24 months
Get PDFThe process that begins around the 6th month of life and continues until the 24th month is called the complementary feeding period. During this period, infants and children start receiving foods that complement breast milk or formula for the first time. The psychosocial factors the infants and children encounter during this period may affect their growth and health in later life. This cross-sectional and descriptive study aimed to examine the factors influencing behaviors of infants and children during complementary feeding. The study sample included 345 mothers with infants and children aged 6-24 months. The research data were collected using two forms and one scale. The first form contained questions about the mothers’ sociodemographic characteristics, sources of support in childcare, and information sources related to complementary feeding. The second form contained questions about the sociodemographic characteristics of infants and children, the presence of allergies, breastfeeding, and feeding status. The scale used was the validated Behaviors of Transition to Complementary Feeding Scale. The effect of independent variables on behavior of infants and children during complementary feeding was examined using multiple linear regression analysis. Infants/children older than 12 months exhibited more negative behaviors during complementary feeding compared with those aged 6-12 months. The study also found that being the first infant/child in the family had a negative impact on behaviors during complementary feeding. Infants and children currently receiving only complementary feeding displayed more positive behaviors during the complementary feeding process. Paternal support in childcare positively influenced behaviors during this period. In conclusion, complementary feeding is a multifaceted process influenced by various factors, including the infant’s and child’s age, family dynamics, and parental support. Strategies to support mothers, involve fathers, and provide reliable information can facilitate a smoother process of complementary feeding and promote healthier feeding behaviors in infants and children. Descriptive, interventional, qualitative, and mixed-methods studies are required to analyze these factors in detail and improve the complementary feeding process
Comparison of demographic life-history traits of the snake-eyed skink: observations from an island and a mainland population
No full textThe life-history traits of animals are influenced by several factors. It has been proposed that key factors such as competition, predation pressure, and resource availability may differ between mainland and island populations of the same species. In this context, our study focused on an island (Yayla, Cyprus) and mainland (Hassa, Türkiye) populations of the snake-eyed skink, Ablepharus budaki. This study aimed to reveal both intra-population and inter-population relationships in terms of mean age, longevity, age at maturity, body size, and sexual dimorphism. Our results show that lizards in the island population had longer lifespans and higher mean ages than the mainland population. Nevertheless, both populations were comparable in terms of mean body size. We also concluded that island individuals reach sexual maturity approximately 1 year later than their mainland conspecifics, and sexual dimorphism in terms of size is observed only in the mainland population. This study, offering initial demographic insights into the non-mainland population of the species, provides the reason for additional research in this field
Analysis of the human factors leading to bridge deficiencies in the context of the Paris mou for bulk carriers
No full textAccording to world trade data, shipping is the preferred mode of transport in terms of cargo transportation. Ships transport cargo safely from one place to another within the frame work of international regulations. In accordance with the outlined regulations, countries are entitled to conduct inspections of vessels arriving in their ports under the agreements. This study aims to reveal the human factors that cause bridge-based deficiencies in terms of safety of navigation on bulk carriers under Paris Mou inspections. In this respect, the inspections carried out within the framework of the Paris agreement were analysed with a focus on the bridge. The bridge deficiencies of bulk carriers were investigated using the annual reports of the Paris agreement and the data of the 20 most frequent deficiencies. The Delphi method was used to determine the factors that cause these deficiencies in terms of safety of navigation. The Delphi method revealed that experts reached a consensus on several key factors contributing to deficiencies in navigational safety, including lack of motivation, ability, knowledge, familiarity, general awareness, experience, company circulars, excessive workload, fatigue, and stress. However, no consensus was reached regarding the factor of indifference
Relationship between green bonds and carbon neutrality: evidence from top five emitting countries’ sectoral CO2 emissions
Get PDFThis study analyzes the influence of green bonds on carbon neutrality. It examines the daily data of sectoral CO2 emissions of the top five CO2-emitting nations from January 2, 2019 to December 30, 2022 using wavelet transform coherence, quantile-on-quantile regression, Granger causality in quantiles, and quantile regression approaches. The results revealed that (i) green bonds are strongly related to sectoral CO2 emissions; (ii) green bonds reduce transport sector CO2 emissions in China, the US, and Japan while causing an upsurge in India and Russia; (iii) green bonds reduce industrial sector CO2 emissions only in the US; (iv) green bonds have a declining influence in energy sector CO2 emissions at lower quantiles in India, China, and the US, whereas the impact increases at higher quantiles; and (v) green bonds decrease residential sector CO2 emissions in the US, Russia, and Japan. The study revealed that green bonds help reduce CO2 emissions in the residential sector in various quantiles. Therefore, the US, Russia, and Japan should raise household awareness of green energy utilization by promoting them with green bonds. In addition, green bonds can effectively reduce transportation sector CO2 emissions in China and the US. Therefore, the policymakers of the two global powers should contribute to global CO2 reduction by promoting green transportation and clean energy transition in the transportation sector through green bonds. Thus, green bonds can play an effective role in the fight against global warming
Impacts of natural resources and technological innovation on SDG achievement of OECD countries: How does democracy and globalization behave?
No full textThis research evaluates the roles of natural resources and technological innovation on Sustainable Development Goals (SDGs) achievement in the organization for economic co-operation and development (OECD) countries. The study considers the data period from 1990 to 2020 and employs robust econometric techniques. The study uses globalization and participatory democracy as control variables. Several models interacting natural resources with technological innovation, globalization and democracy are also introduced to see if they moderate the association between natural resources and sustainable development index (SDI). The study outcomes reveal that natural resources and technological innovation both positively and significantly affect SDI of these nations. Moreover, participatory democracy and globalization have also been found to support the SDI. The interaction between natural resources and democracy shows a negative impact, while the interaction between natural resources and globalization shows a positive impact on SDI. Based on these results, several policy directions are suggested to advance the SDGs in OECD nations