Mudanya University Institutional Academic Archive System
Mudanya University's Dspace system is a platform that digitally stores and opens academic studies. Academic content such as articles, presentations, theses, books, and reports are included here. Dspace@Mudanya provides easy access, making it a valuable resource for researchers and students. It serves as a digital archive for Mudanya University's academic outputs, facilitates access to scientific information and supports its sharing. For more information and assistance, please contact us.
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A theoretical and experimental investigation using a multi-criteria decision-making approach to investigate the use of oak cupule biomass as a sustainable corrosion inhibitor for mild steel in acidic solution
(Elsevier, 2025-08) Şişmanoğlu, Sedef; Mert, Mehmet Erman; Doğru Mert, Başak; Abdulvahitoğlu, Adnan; 382420
This study investigates adsorption mechanism and inhibition efficiency of oak cupule (OC) biomass on mild steel (MS) corrosion in an acidic medium through quantum chemical calculations and electrochemical analysis. The chemical composition of OC was characterized using FTIR-ATR, mass spectrometry, and UV–Vis spectroscopy. Electrochemical impedance spectroscopy was conducted at varying inhibitor concentrations, complemented by surface morphology analysis via SEM and contact angle measurements after 168 h of immersion. At 250 ppm, the inhibition efficiency reached 92.5 %, attributed to the presence of tannins and polyphenolic compounds. Adsorption followed the Langmuir isotherm, with an equilibrium constant of 2.36 L mg−1 and a Gibbs free energy change of −12.08 kJ mol−1. Contact angle measurements indicated increased hydrophobicity due to the formation of protective layer. Potential of zero charge (PZC) analysis confirmed electrostatic interactions between OC molecules and the positively charged MS surface in 0.5 M HCl. Molecular insights were obtained using Density Functional Theory (DFT) with the B3LYP/6–311++G(d,p) method, revealing electronic properties such as frontier molecular orbital energies, energy gap and atomic charges. The optimum result was determined by analyzing the experimental findings at different inhibitor concentrations and different durations using Multi Criteria Decision Making (MCDM) methods. It was found that scenario S5 provided the optimum result.
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Capital-Labor-Output Nexus in Türkiye's Fisheries Sector: Panel ARDL Analysis
(Isparta University of Applied Sciences, 2025-09) Şengül, Serkan; 355807
This study analyzes the relationship between production, labor force and capital investments in the fisheries sector in the Marmara, Aegean, Mediterranean, Western Black Sea and Eastern Black Sea regions of Türkiye and examines their effects on sectoral growth and employment. In the study, total fish production, number of employees in the sector and capital investments (number of vessels) variables are used in the panel data analysis covering the period 2006-2023. According to the results of the analysis, the labor force has a positive and significant effect on production, but the effect of capital on production is negative. This shows that capital investments in the Turkish fisheries sector have not been able to provide the expected productivity growth. Moreover, capital investments are found to support employment by increasing labor demand. The long-run cointegration results reveal a strong equilibrium relationship between the variables. This study contributes to the existing research in the literature and provides strategic recommendations for the development of sustainable growth and productivity policies in Türkiye's fisheries sector. In particular, supporting aquaculture activities, modernizing capital investments and taking regional differences into account are critical for the long-term sustainability of the sector.
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Wreckage and Rule: Necropolitical and Biopolitical Configurations of Urban Space in J.G. Ballard’s Concrete Island
(RumeliYa Yayıncılık, 2025) Özçelik, Kaya; 351393; Yılmaz, Yakup
Engaged primarily with the detrimental effects of modernism and late capitalism, which have a destructive impact on humanity, Ballard registers these impacts in all his works from various perspectives. Bearing this approach in mind, Ballard’s writing shifts its focus from external realities to internal experiences, aiming to explore how technology shapes one’s perception, memory, and desires. Grounded in the formative experience of turmoil and confinement, this preoccupation of Ballard forms the basis for all his works, establishing his reputation in post-war English literature. Celebrated for his challenging style and satirical tone in his depiction of bleak, dystopian, and post-apocalyptic scenarios, James Graham Ballard (1930–2009) holds a significant role in the world of English fiction through his novels, short stories, and essays. Born in Shanghai and interned in a Japanese civilian camp during World War II, Ballard’s earlier experiences of imprisonment and societal collapse contributed significantly to his literary imagination, as later fictionalised in his Empire of the Sun (1984).
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Gıda Güvenliğinin Ekonomik ve Çevresel Belirleyicileri: BRICS-T Ülkeleri İçin Bir Analiz
(Dokuz Eylül Üniversitesi, 2025-07) Şengül, Serkan; Köprücü, Yılmaz; 355807
Bu çalışma, BRICS-T ülkelerinde gıda güvenliğini etkileyen ekonomik ve çevresel faktörlerin uzun dönemli etkilerini analiz etmektedir. Çalışmada, gıda güvenliği endeksi, karbon emisyonları, kişi başına düşen gelir, nüfus artış oranı, ve enflasyon değişkenleri incelenmiştir. Panel eşbütünleşme testi ve FMOLS yöntemleri kullanılarak, karbon emisyonlarının gıda güvenliği üzerinde pozitif bir etkisi olduğu, ancak bu etkinin çevresel sürdürülebilirlik açısından risk oluşturabileceği tespit edilmiştir. Bulgular, sürdürülebilir tarım teknolojilerine yatırım yapılması, doğal kaynakların korunması ve uluslararası işbirliklerinin artırılması gerektiğine işaret etmektedir. Çalışma, BRICS-T ülkelerinin farklı ekonomik ve çevresel koşulları ışığında literatüre yeni bir bakış açısı sunmaktadır.
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Production and Sustainability in Türkiye's Fisheries Sector: The Role of Economic Variables
(Çanakkale Onsekiz Mart University, 2025-07) Şengül, Serkan; 355807
This study investigates the impact of basic economic variables on production processes in Türkiye's fisheries sector, emphasizing sustainable development strategies. Using a dataset from the Turkish Statistical Institute covering annual data from 2003 to 2023, the research employs the ARDL model to examine the long-term and short-term effects of capital investments, labor costs, and energy expenses on total production. Results indicate that capital investments significantly enhance productivity, though misallocation can negatively impact efficiency. Labor and energy costs exhibit a negative effect, underlining the importance of cost optimization for sectoral sustainability. Based on these findings, the current study proposes strategic policy recommendations such as; efficient capital allocation, labor cost optimization through training programs, and the adoption of renewable energy sources to reduce operational expenses. These recommendations aim to support sustainable growth in the Turkish fisheries sector, enhance food security, and bolster economic resilience.
