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Effects of acid and ultrasound treatments on the properties of dry pea starch and starchbased films (JUN, 10.1007/s11694-025-03388-2, 2025)
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Evaluation of elderly suicides in Turkey between 2007 and 2022: an ecological study
No full textObjectives This study analyzes trends in suicide rates among individuals aged 65 and over in Turkey from 2007 to 2023 and examines associations with socio-economic factors between 2013 and 2022. Method Data were obtained from the Turkish Statistical Institute. Suicide rates per 100,000 were calculated by gender. Spearman correlation and the Joinpoint Regression Program (JRP) were used to explore associations with variables including poverty, labor force participation, unemployment, Gini coefficient, Consumer Price Index, minimum pension, and GDP. Results Between 2007 and 2023, 6,373 elderly suicides were recorded, with an average rate of 5.77 per 100,000. Male suicide rates (9.90) were significantly higher than female rates (1.67) (p < 0.001). The highest rate was observed among those aged 75 and over (6.95 per 100,000). Regionally, the Aegean had the highest rate (5.26), while Istanbul had the lowest (3.28). From 2013 to 2022, elderly suicide rates declined annually by 1.19% (p = 0.011). A significant negative correlation was found between labor force participation and suicide rates (r = -0.847; p = 0.008). Conclusion Although elderly suicide rates in Turkey have declined, the issue remains a serious public health concern, warranting continued research and targeted interventions
On the causal dynamics between nuclear energy, renewable energy and economic growth in the selected South and Southeast Asia countries: evidence from RALS cointegration and bootstrap asymmetric causality
No full textThe global shift toward sustainable energy has intensified focus on nuclear and renewable energy as alternatives to fossil fuels. In South and Southeast Asia, where energy demand is rising alongside economic growth, understanding the dynamics between energy types and growth is crucial. This study investigates the causal relationships between nuclear energy consumption (NEC), renewable energy consumption (REC), and economic growth (EG) in five selected countries, namely India, Japan, Pakistan, South Korea, and Taiwan. The hypothesis is that NEC and REC exert asymmetric and country-specific effects on EG. Using annual data converted to quarterly frequency, we apply the Bootstrap-Kruse nonlinear unit root test, RALS cointegration methods, and the Hatemi-J asymmetric causality test. The results reveal long-run NEC-EG and REC-EG linkages in several countries, with significant differences in direction and magnitude. Asymmetric causality tests further confirm that positive and negative shocks affect variables differently. The findings highlight the need for tailored, country-specific energy policies to balance growth with sustainability
Highly accurate compact difference schemes for multidimensional delay Schrödinger equations
No full textIn present paper, the second-order accurate stable compact difference schemes (DSs) for the delay Schr & ouml;dinger-type partial differential equation (DSPDE) in a Hilbert space are constructed. The stability of these DSs is established. As applications, stability estimates (SEs) for the solutions of DSs for two types of DSPDEs are derived. A numerical method is proposed for solving one and two-dimensional DSPDEs.RUDN Program 5-100; Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan [BR05236656]The work was supported by the RUDN Program 5-100 and within the framework of the target program BR05236656 of the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan
Early childhood STEM education research in Türkiye: a meta-synthesis study
No full textThis research aims to establish a comprehensive framework for studying STEM education in early childhood using the meta-synthesis approach. A total of 97 studies conducted in Türkiye between 2017 and October 2024 were examined, focusing on their contributions to the field. The studies were categorized based on sample groups, research methods, data collection tools, and the impact of STEM-based educational practices on children, teachers, and teacher candidates. The findings highlight that STEM education in early childhood generally yields positive outcomes, fostering children’s cognitive, social, and problem-solving skills. Teachers and teacher candidates also benefit, as these practices enhance their interdisciplinary teaching abilities and confidence in integrating STEM into their curricula. Despite the growing interest in STEM education, certain areas remain underexplored, such as long-term impacts on children, parental involvement, and the role of school administrators. Additionally, while experimental methods dominate, there is a need for more qualitative and mixed-methods research to provide a nuanced understanding of contextual and process-oriented factors. The results indicate a significant increase in research dedicated to STEM education in recent years, reflecting its critical role in preparing children for the demands of the 21st century. This meta-synthesis study provides a comprehensive overview of trends, gaps, and future directions in the field. By identifying commonalities and under-emphasized points, it offers valuable insights for researchers, educators, and policymakers aiming to advance STEM education in early childhood settings
The Bioactive Potential of Fruit Juice of Black Chokeberry (Aronia melanocarpa) Produced in Edirne Province-Turkiye: Phenolic Profile, Elemental Composition, and In Vitro Antioxidant and Antibacterial Activities
No full textIn today's world, the market and consumption of fruits are constantly increasing due to the versatility offered by the presentation of fruits in many different forms when marketed. In particular, the nutritional properties of fruits and the types that provide benefits such as antioxidant, antimicrobial, and anti-inflammatory properties also positively affect this situation. The term 'superfruit' has been coined to highlight the exceptional nutritional value and distinctive health-promoting phytochemicals of specific fruits. The present study purposed therefore to systematically explore the phenolic profile, macro/micro-element ingredients, and the capacity of in vitro antioxidant and antibacterial activity in fruit juice from Aronia melanocarpa, a fruit widely recognized as a superfruit, cultivated for four years in Edirne Province, T & uuml;rkiye. Aronia melanocarpa fruit juice (AFJ) used in our experiment was rich in phenolic acid (2.37 +/- 0.28 mg gallic acid equivalents mL(-1) juice) and flavonoid substances (4.68 +/- 0.45 mg catechin equivalents mL(-1) juice). Considering the effect of both AFJ concentration and treatment duration, the higher antioxidant activity was observed in ABTS(+center dot) assay compared with the DPPH center dot assay. The IC50 of DPPH center dot and ABTS(+center dot) scavenging abilities were 26.31 +/- 0.65 and 27.99 +/- 0.78 mu L mL(-1), respectively, and the MIC of AFJ against Gram-positive and Gram-negative bacteria were 71,687 and 286,750 mu g mL(-1), respectively. Aronia juice from Edirne, rich in polyphenolic substances, has the potential to be used directly/indirectly as both an antioxidative and antibacterial additive in the production of functional beverages or foods.Trakya niversitesiThis work was supported by Trakya UEniversitesi
Evaluation of the economic and environmental ımpacts of technological developments in hydrogen energy in the 21st century
No full textdaha sonra doldurulacaktırdaha sonra doldurulacaktı
Design techniques for maximum distance separable semi involutory matrices
No full textDoğrusal dönüşüm katmanları, modern blok şifreleme algoritmalarında yayılma ilkesini gerçekleştiren temel yapı taşlarıdır. Maksimum Uzaklıkta Ayrılabilen (MDS) matrisler, maksimum dal sayısıyla güçlü yayılım özellikleri sundukları için bu katmanların tasarımında tercih edilirler. Öte yandan, tersi kendisine eşit (involutif) olan doğrusal dönüşüm katmanları, şifreleme ve şifre çözme işlemlerinin aynı maliyetle uygulanmasına olanak tanıyarak avantaj sağlamaktadırlar. Bir involutif matrisin, c elemanıdır F_(2^m) - {0,1} skaleri ile çarpımına eşit olan yarı involutif MDS matrisler ise ters alma işlemlerinin yalnızca basit matris çarpımlarıyla gerçekleştirilebilmesini sağlayarak daha geniş bir tasarım alanı sunmaktadır. Bu tez çalışmasında, F_(2^3) ve F_(2^4) sonlu cisimlerinde tanımlı indirgenemez polinomlar kullanılarak involutif MDS matrislerden yarı involutif MDS matrislerin elde edilmesine olanak tanıyan cebirsel bir yöntem önerilmektedir. Ayrıca, geliştirilen matrislerin donanımsal uygulanabilirliğini artırmak amacıyla dört farklı XOR optimizasyon algoritması ile karşılaştırmalı analizleri gerçekleştirilmiştir.Linear transformation layers are the fundamental building blocks that implement the diffusion principle in mo
Investigation of the emission values of butane, methane and methane-hydrogen mixtures used in household stove burners
No full textAir pollution is an increasingly significant environmental issue worldwide, primarily driven by the use of fossil fuels, which pose a serious threat to environmental health. Fossil fuels contribute to the accumulation of greenhouse gases in the atmosphere, thereby accelerating climate change and leading to air pollution that adversely affects human health. Natural gas is widely used for domestic purposes and has been utilized in many countries for decades due to electricity prices and public habits. However, the emission levels associated with household natural gas heating systems, particularly gas stoves, have become a critical factor directly impacting human health. Therefore, enhancing the efficiency of gas stoves and reducing waste emissions could play a crucial role in combating global air pollution. This study aims to investigate the combustion performance of butane, methane, and methane-hydrogen mixture gases used in household gas stoves. The primary objective is to determine the levels of carbon dioxide (CO2) and carbon monoxide (CO) emissions released into the environment after combustion and to compare the environmental impacts of different fuel mixtures. Conducted through experimental and numerical analyses, this study reveals the effects of hydrogen mixtures on methane gas emissions. The combustion test results indicate that the CO level measured during butane combustion is 0.30 ppm, whereas this level decreases to 0.13 ppm when hydrogen-mixed methane gas is used. These findings suggest that hydrogen mixtures have the potential not only to enhance combustion efficiency but also to reduce harmful emissions. Furthermore, this study provides valuable insights into the necessity of transitioning toward environmentally friendly and sustainable fuel mixtures in future energy systems. Ensuring energy efficiency while minimizing negative environmental impacts is considered a critical step in addressing air pollution, particularly in household heating systems