Eastern Mediterranean University Institutional Repository (EMU i-REP)
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Recent Submissions
Item type:Item, ELT Students’ and Instructors’ Perceptions About Online Teaching and Assessment during Covid-19(Eastern Mediterranean University, 2023) Zeren, Nihan; Gilanlıoğlu, İlkay (Supervisor)This study aimed to identify the perceptions of undergraduate students and instructors in the Department of Foreign Language Education regarding the emergency online education and assessment in ELT during the Covid-19 pandemic. The research specifically examined the advantages and disadvantages of online education, the efficacy of emergency training models at universities, and students' practical performance. Employing a qualitative methodology, data were gathered through semi-structured interviews. The participants included 40 students (ten from each academic year) and twelve faculty instructors in the Department of Foreign Language Education. The interviews revealed both disparities and commonalities concerning teaching and assessment during the Covid-19 pandemic. While most undergraduate students expressed positive perceptions, they also acknowledged the comparative ease of passing online exams however, technical hurdles hindered their grasp of course content, resulting in decreased motivation. Instructors shared similar perceptions, recognizing the potential benefits of online education for language teaching, yet also acknowledging technical challenges. In contrast to student perceptions, instructors emphasized that online exams' reliability was lower compared to face-to-face assessments. Instructors and students shared similar viewpoints regarding the importance of face to-face education for comprehensive comprehension and communication of course content. Both groups acknowledged the positive impact of online education on language learning within the Department of Foreign Language Education. Improved knowledge accessibility was notably reported. Furthermore, online exam scores significantly exceeded those of traditional face-to-face settings. On the other hand, this presented a challenge for ELT instructors who perceived online test outcomes as less reliable. Instructors believed they could adapt better to online exams, potentially leading to more feasible academic success. This study also highlighted undergraduates' struggles with communication and technical issues in online courses, favoring face-to-face learning for better understanding. Keywords: Emergency Online Education in English Language Education, Advantages and Disadvantages of Emergency Online Education, Advantages and Disadvantages of F2F Education, Positive and Negative Perceptions of ELT Instructors on Assessment, Positive and Negative Perceptions of ELT Students on Assessment.Item type:Item, Effects of the Different Mixture Techniques on the Hardened and Durability Properties of Recycled Aggregate Concrete(Eastern Mediterranean University, 2025) Toker, Enver; Eren, Özgür (Supervisor)Using recycled aggregate in the manufacturing of concrete is a green way to preserve natural resources and lessen pollution in the environment. Various treatment techniques are applied to enhance the appeal of using recycled concrete aggregate (RCA) in concrete; however, these techniques increase the cost of the product. This study examined how different mixing techniques impact the mechanical and durability properties of concrete with untreated RCA. For this purpose, eighteen different mixtures were made using two different RCA obtained from ready-mix concrete plant waste and old demolished building waste, three different mixing techniques (Normal mixing approach, two-stage mixing approach and sand envelope mixing approach) and three replacement levels (20%,30%,50%). In the study, it was determined that the two-stage mixing technique reduced the water requirement of concrete and improved the compressive strength by 3.3%, splitting tensile strength by 14.2%, modulus of elasticity by 4.2% and impermeability in RCAn series concretes. Moreover, it was determined that the concrete produced with natural aggregate obtained from old building waste had 21% higher compressive strength and 7.2% higher modulus of elasticity than the concrete with normal aggregate at 20% and 30% replacement levels, respectively. Keywords: concrete, recycling, aggregate, mixing, environment.Item type:Item, Voltage Sag Mitigation in the Distribution System by Optimal Allocation of Distributed Generation Units(Eastern Mediterranean University, 2022) Kanzi, Saman; Sirjani, Reza (Supervisor)In this thesis, a genetic algorithm (GA) based optimization is used to increase the voltage stability of a power network employing Distributed Generation (DG) Units. GA determines the best placements for DG Units in the power network. The number and sizes of DGs utilized are likewise calculated using the specified method. First, the backward/forward sweep method has been tweaked to enable for analysis of the iterative process' convergence. Then, rectified the issue without the use of GA has been applied. The key rationale for adopting GA to tackle the problem is that, given the quantity and size of DGs, determining the ideal locations for them might be quite difficult and time intensive. An index termed objective indices, which indicates the power flow and voltage deviation of the power network, is proposed to evaluate and compare the possible options. The bus voltages, and hence the network's VI, are determined using a Forward/Backward load flow. Moreover, by weight factors method (WF), because of the approach utilized, all WFs have an equal probability of influencing the output of the objective function, making them unified and dimensionless. As a result, by considering the number of buses affected by voltage sag has been considered to mitigate the voltage sag and enhancing voltage amplitudes in a radial distribution system. The findings imply that using DGs enhances the voltage stability of the network. Furthermore, because GA is an optimization algorithm, it may discover the best solution for the issue in terms of the number, size, and position of DGs after a given number of iterations. The thesis finishes with the best solution to the problem as well as the load flow data for the ideal condition. Keywords: Distributed Generation, Genetic Algorithm, Particle Swarm Optimization, Objective Function, Weight Factor, Backward/Forward Power Flow, Voltage Indices, Active and Reactive Power Losses.Item type:Item, 7. Sınıf Müzik Dersi Kazanımlarına Yönelik Kodály Pedagojisi Temelli Ders Planları Önerilerinin Uzman Görüşleri Doğrultusunda İncelenmesi(Doğu Akdeniz Üniversitesi, 2025) Koç, Almira; Müezzinoğlu, Alev (Tez Danışmanı)Bu çalışmada, Kuzey Kıbrıs Türk Cumhuriyeti 7. sınıf müzik dersi öğretim programında yer alan kazanımlar dikkate alınarak Kodály pedagojisi temelli ders planlarının hazırlanması amaçlanmıştır. Bu ders planları alan uzmanlarının görüşleri doğrultusunda uygulanabilirliği, etkililiği ve programa uygunluğu değerlendirilmiştir. Bu çalışmada, tek durumlu gömülü durum çalışması deseni kullanıldığı ve bu çalışma nitel bir çalışmadır. Araştırmada veri toplama aracı olarak beş sorudan oluşan yarı yapılandırılmış görüşme formu kullanılmıştır. Hazırlanan ders planları görüşme formu kullanılarak uzman görüşlerine sunulmuş, uzmanların dönütleri doğrultusunda, hazırlanmış olan ders planları içerik analizine tâbi tutulmuş, yeniden düzenlenmiş ve son hâlini almıştır. Hazırlanan ders planlarında, 7. sınıf müzik ders kitabında yer alan Kıbrıs Türk halk şarkıları ve Türk şarkılarından oluşan toplam dokuz adet şarkı kullanılmıştır. Şarkıların seçiminde, Kodály pedagojisinin temel ilkeleri, araçları ve ders planlama aşamaları göz önünde bulundurulmuştur. Ders planları, Kodály pedagojisi, ilkeleri ve müzik öğretim programı kazanımları ilişkilendirerek dokuz haftalık ders planı hazırlanmıştır. Araştırmanın sonucunda, uzman görüşlerine göre Kodály pedagojisine dayalı olarak hazırlanan müzik ders planlarının, hedeflenen kazanımların öğrencilere kazandırılmasında etkili olduğu ifade edilmiştir. Ders etkinliklerinin planlanmasında, ritim, aralık ve ölçü zamanlarının öğretiminde basitten karmaşığa, kolaydan zora ve oyundan teoriye aşamalarına uygun bir yapı izlenmesi gerektiği vurgulanmıştır. Öğrencilerin derse olan ilgisini ve dikkatini artırmada kullanılan materyallerin etkili olduğu, ders planlarının Kodály pedagojisinin temel araçlarıyla uyumlu biçimde hazırlandığı belirtilmiştir. Söz konusu araçların doğru ve işlevsel şekilde kullanılması durumunda, şarkı öğretiminin öğrenciler açısından daha kalıcı hale geldiği ortaya konmuştur. Ders planlarında halk şarkılarına öncelik verildiği ve halk şarkıları öğrencilerin ilgisini çektiği ifade edilmiştir. Doğaçlama ve yaratma etkinliklerinin genellikle uygulama sürecinde yer aldığı, ayrıca basit ve bileşik ölçülerle ilgili öğrenme çıktılarının, Kodály pedagojisinde yer alan ritim öğretim sırasıyla uyum sağladığı belirlenmiştir. Tüm bu bulgular doğrultusunda, uzman görüşlerine dayalı olarak hazırlanan müzik ders planlarının, 7. sınıf öğretim programındaki kazanımların öğrencilere pedagojik ve müziksel beceriler yönünden aktarılmasında etkili bir temel oluşturduğu görülmüştür. Anahtar Kelimeler: 7. Sınıf kazanımları, Kodály pedagojisi, Kıbrıs Türk halk ezgileri, örnek ders planları, uzman görüşleriItem type:Item, Experimental Performance Analysis of Salt in Matrix Composites for Thermochemical Heat Storage(Eastern Mediterranean University, 2022) Al-Ghosini, Abdullah Ibrahim; Aydın, Devrim (Supervisor)Thermochemical heat storage (THS) is a promising technology for improving the utilization from renewable energy sources due to its low heat losses, high energy storage density, and long-term heat storage capability. In that regard, synthesis of new sorption materials is critical for advancing THS systems in the future. This study aims to develop composite sorbents and perform energetic, exergetic, and hygro-cyclic analyses for performance comparison of the tested composite sorbents. In this study, nine different THS materials were synthesized using pumice and vermiculite as the host matrices, and CaCl2, LiCl, MgCl2, LiNO3 as the sorbent salts. The nine sorption materials developed and tested in this study are; P-CaCl2, V-CaCl2, P-LiCl, V-LiCl, P-MgCl2, V-MgCl2, P-LiNO3, V-LiNO3, and P-CaCl2-LiCl. All developed composite materials were tested over four consecutive cycles, and their energetic, exergetic, and hygro-cyclic performances were comparatively investigated. It is worth to mention that the developed pumice-salt composites are novel and have not been investigated previously. According to the results, the highest energy density of pumice composites was obtained with P-LiCl at 356 kWh/m3 , and the lowest was with P-LiNO3 at 150 kWh/m3 . Similarly, for vermiculite composites, the energy density was obtained highest with V-LiCl at 492 kWh/m3 , and lowest with V-LiNO3 at 205 kWh/m3 . Based on the general observation, the energy density of vermiculite based-salts was higher; however, the desorption capability was lower compared to pumice based-salts. In addition, P-CaCl2-LiCl had the highest energetic cyclic efficiency among pumice composites (90%), while P-MgCl2 had the lowest with 60%. The highest and lowest energetic efficiencies were found with V-LiCl and V-LiNO3 at 91 and 77%, respectively, for vermiculite composites. The highest exergetic efficiency was obtained with P-LiCl and V-LiCl at 12 and 18%, respectively. The lowest exergetic efficiency were obtained as 3% with P-MgCl2 and 6% with V-LiNO3. According to the testing results, hygro-cyclic efficiencies of pumice-based composites were found higher when compared to vermiculite-based composites. In addition, pumice-based materials showed high structural stability also good thermal performance, and sorption/desorption kinetics over repeating cycles. Whereas vermiculite-based materials showed lower structural stability and desorption capability than pumice composites. The study results showed that the P-CaCl2-LiCl composite provides the highest energetic and hygro-cyclic efficiencies among all the tested sorbents and shows a high exergetic efficiency. Therefore, it could be concluded that pumice based multi-salt composites could be promising THS materials. Further work could be performed in this area for development and optimization of new pumice based multi-salt composites. Keywords: Thermochemical Heat Storage, Salt in Matrix, Pumice, Vermiculite, Sorption, Desorption, Sorbent, Performance Analysis.
