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Characterization and Tribology Performance of Refractory Materials Coatings with Blast Furnace Slag (BFS) Fabricated by Thermal Spraying
No full textThis study aims to identify a novel area of use for metallurgical slags, which cause environmental problems. The usability of low-cost material with blast furnace slag (BFS) content in thermal spray coating technology and wear-based applications was investigated. For this purpose, the microstructural properties and wear performances of thermal spray coatings with 80Ni-20Cr content and coatings with BFS content currently used in commercially oriented applications were investigated in detail. The wear performance of the coatings was investigated under dry sliding conditions in ball-on-flat reciprocating tests using an Al2O3 ball as the counterpart. It was observed that the produced BFS coatings had a microstructural homogeneous structure and had porosity and oxide structure reflecting the traditional feature of the thermal spray coating process. It was determined that the hardness and surface roughness values of BFS coatings were higher than 80Ni-20Cr commercial coatings. As a result of the wear tests, it was observed that the wear performance of BFS coatings was higher than that of 80Ni-20Cr coatings and that oxidative, abrasive and adhesive wear mechanisms accompanied the wear failure formation
Exploring the Dual Dynamics of Language Anxiety and Enjoyment in EFL Learners
No full textIn recent years, there has been a growing body of research examining the role of positive psychology in language learning and achievement. However, the predominant focus has been on the impact of negative emotions, while positive emotions have often been overlooked. Moreover, the idea that two opposing emotions can occur simultaneously in language classrooms has been given very little attention. This study, therefore, aims to address this research gap by investigating both negative and positive emotions in English as a foreign language (EFL) learners. Employing a qualitative perspective, in-depth interviews were conducted to elucidate the influence of positive psychology on EFL learners and their academic achievements. The data analysis revealed key determinants of foreign language anxiety (FLA), contributors to foreign language enjoyment (FLE), and the significance of perceived competence in shaping EFL learners' overall language outcomes. The results highlight the critical role of creating a positive classroom environment that promotes enjoyment and reduces anxiety. Increased enjoyment in the foreign language classroom can enhance learning motivation and behaviors, ultimately leading to improved learning outcomes. This research contributes to a more comprehensive understanding of emotions, specifically the interplay between positive and negative ones, and their impact on the language learning process
Predicting Consumer Preferences for Furniture Products on E-commerce Platforms: An Analysis Using Machine Learning and Favorite Listing Data
No full textThe rapid growth of e-commerce platforms presents unique opportunities to analyze consumer behavior and predict product preferences in the furniture industry. This study explores the use of machine learning techniques to predict consumer choices for furniture products based on favorite listing data from e-commerce platforms. A dataset of 239 furniture products was collected, categorized into three groups: most preferred, moderately preferred, and least preferred. Key attributes, including furniture type, dimensions (width, depth, height), color, material, and price, were analyzed. Machine learning models, specifically Decision Trees and Random Forests, were applied to develop prediction models for these categories. The models were assessed using metrics such as accuracy, precision, sensitivity, and F1-score. Results indicated that the Random Forest model outperformed the Decision Tree, achieving 83% accuracy in predicting preference categories. Feature importance analysis highlighted that price and physical dimensions were the most significant factors influencing consumer preferences. These findings suggest that practical and economic aspects are prioritized over aesthetic features when choosing furniture. The study demonstrates the potential of machine learning in predicting consumer behavior, offering valuable insights for manufacturers and retailers in optimizing product development, inventory management, and marketing strategies. © 2025 Elsevier B.V., All rights reserved
Orman Genel Müdürlüğü taşra teşkilatı çalışanlarının çam balı üretimine ilişkin değerlendirmeleri (Ege Bölgesi örneği)
No full textÜretimi büyük ölçüde Türkiye’deki kızılçam ormanlarında yapılan ve yurtdışına önemli miktarda satışı gerçekleştirilen çam balının sürdürülebilir bir şekilde üretimine yönelik politikaların belirlenmesine destek olmak bu çalışmanın amacını oluşturmaktadır. Bu doğrultuda, çam balı üretiminin en fazla olduğu Muğla ve İzmir Orman Bölge Müdürlüklerinde görev yapan 122 ormancı teknik ve idari personel ile anket uygulanmıştır. Anket formlarında beşli Likert tipi ölçekli sorular/ifadeler kullanılmış, veriler tanımlayıcı istatistikler ve Mann Whitney-U testi ile çözümlenerek Orman Genel Müdürlüğü (OGM) taşra teşkilatı çalışanlarının çam balı üretim ormanlarının işletilmesine ve çam balı üreticilerine yönelik değerlendirmeleri ortaya konulmuştur. Buna göre, OGM taşra teşkilatı çalışanları basralı (Marchalina hellenica) orman alanlarının işletilmesinde ayrı bir yönetim modeli geliştirilmesini, orman bakım tedbirleri ile bal verimi ilişkisinin ortaya konulması gerektiğini ve yangın çıkma potansiyeli yüksek alanların belirlenmesini çok önemli olarak değerlendirmiştir. Ayrıca ormanda konaklayan üreticilerin yangına ilk müdahale için gerekli donanımlara sahip olma şartı getirilmesi gerektiği ifade edilmiştir. Üreticilerin basralı sahalardaki tıraşlama kesimine karşı çıktıkları belirtilerek bu sahalarda uygulanacak silvikültürel yöntemlerin arıcılara ve yöre halkına ayrıntılı bir şekilde anlatılmasının önemine vurgu yapılmıştır
Assessment of Student Performance for Laboratory Application Course Examination Using Rasch Measurement Model
No full textRasch Measurement Model creation in social science education has quickly spread to other educational domains, such as technical and engineering sciences. This research attempts to move testing and assessment in Laboratory Application in Science Education away from the traditional paradigm and toward the bio-based Rasch Model. Based on Kuhn's description of the purpose of measurement, it is thought that the Learning Performance Measurement System (LPMS), in particular, is compatible with the basic measurement now in use. These cannot be obtained from engineering science or statistics textbooks. Following a paradigm change, the Faculty of Education at one of the higher education institutions in Turkiye has started using the Rasch Model to assess the success of its Course Learning Outcomes (CLO): Decision Support System. The Rasch Model provides an accurate summary of the students' success on a linear scale for measuring by tabulating the students, i.e. Person and Items on a Distribution Map (PIDM). A comparison between the Rasch measurement and the conventional histogram tabulation and simple means reveals that the former provides a more thorough exploratory depth for comprehending difficulties in science education courses. Even with the limited sample size, the students were well-categorized based on their individual cognitive talents; as a result, CLOs were created using Bloom's Taxonomy as the structural basis. It is therefore feasible to apply this methodology to the evaluation of general abilities in professionals or students. As a result, the Rasch model of evaluating an individual's ability adopts a new paradigm
Tasavvufta Semâ ile Şaman Ayininin Ritüel ve Tecrübe Açısından Mukayesesi
No full textSemâ, sûfînin Allah’a ulaşmasında bir yoldur. Şaman ayini ise şamanı kozmik âleme götüren aracı konumundadır. Şamanın ruhlarla kurduğu iletişimin bir nevi dışa yansımasıdır. Semâ, Allah’ın kulun kalbine yerleştirdiği mananın ortaya çıkmasıdır. Sûfî dinlediği bir nağmede, doğada olan bir seste kısacası her şeyde Allah’ı müşâhede ederek semâya ulaşabilir. Sûfî, semâ yaparken Allah’ı müşâhede eder ve semânın sonucunda mârifete ulaşır. Kalbi Allah korkusuyla titrer. İçerisinde bulunduğu bu hâl kendisini bir mertebe daha Allah’a yaklaştırır. Semâ, Allah’tan gelen bir hâldir. Semâ, sûfîyi manevi mertebelere taşıyacak araç görevindedir. Şamanın ise görevini tam olarak yerine getirebilmesi için ayin yapması gerekmektedir. Çünkü şaman, ayin yapmadan yardımcı ruhlarını çağıramaz ve esrimeye ulaşamaz. Bu çalışmada tasavvufta semâ ile Şamanizm’de ayin olgusu karşılaştırılmıştır. Sûfî ve şamanın metafizik âlem ile bağ kurma yöntemi olan sema ve ayin birbirine benzeyecek kadar şekilsel benzerliklere, birbirinden tamamen ayrılacak kadar da manevi farklılıklara sahiptir. Tasavvuf ve Şamanizm’deki derûnî ve metafizik yaşantının ortaya çıkartılması bu çalışmanın amaçları arasındadır
The role of digital literacy and problematic media use in elementary school students' attitudes towards reading
No full textBu araştırmanın genel amacı ilkokul öğrencilerinin okumaya yönelik tutumlarında dijital okuryazarlık ve problemli medya kullanımının rolünü ortaya koymaktır. Araştırmanın çalışma grubunu Bartın ilinde eğitim öğretim faaliyetlerine devam eden 122'si 3. sınıf 114'ü 4. sınıf olan toplam 236 öğrenci ve bu öğrencilerin ebeveynleri oluşturmaktadır. Araştırmada veri toplama aracı olarak araştırmacı tarafından geliştirilen kişisel bilgi formu, Ciğerci vd. (2022) tarafından uyarlanan "Dijital ve Basılı Okumaya Yönelik Tutum Ölçeği" ve Şahin vd. (2022) tarafından geliştirilen "İlkokul Öğrencilerine Yönelik Dijital Okuryazarlık Ölçeği" öğrencilere uygulanmıştır. Ebeveynlere ise Furuncu ve Öztürk (2020) tarafından Türkçe 'ye uyarlanan "Problemli Medya Kullanım Ölçeği" uygulanmıştır. Araştırmadan elde edilen verilerin analizi SPPS 25 paket programı aracılığı ile gerçekleştirilmiştir. Veri analizinde betimsel istatistiklerin yanında gruplar arası karşılaştırmalarda, bağımsız gruplar için t testi ve tek yönlü varyans analizi (One Way ANOVA) kullanılmıştır. Ayrıca değişkenler arasındaki ilişkileri incelemek için Pearson korelasyon analizi ve çoklu doğrusal regresyon analizi kullanılmıştır. Etki büyüklüklerini hesaplamak için ise Cohen d ve Eta kare (?) hesaplamaları yapılmıştır. Araştırmadan elde edilen bulgulara göre ilkokul öğrencilerinin dijital ve basılı okumaya yönelik tutumlarının cinsiyetlerine, öğrenim gördükleri sınıf düzeyine ve bir yılda okudukları kitap sayısına göre anlamlı farklılık gösterdiği, problemli medya kullanım durumlarının ise sadece cinsiyetlerine göre anlamlı farklılık gösterdiği belirlenmiştir. Dijital okuryazarlık düzeylerinde cinsiyetlerine ve öğrenim gördükleri sınıf düzeylerine göre anlamlı farklılık tespit edilmiştir. Öğrencilerin dijital ve basılı okumaya yönelik tutum puanları ile problemli medya kullanımları arasında düşük düzeyde dijital okuryazarlıkları arasında ise orta düzeyde anlamlı bir ilişki bulunmuştur. Ayrıca regresyon analiz sonuçları doğrultusunda öğrencilerin dijital okuryazarlık becerileri ve problemli medya kullanımlarının dijital ve basılı okumaya yönelik tutumlarını anlamlı bir şekilde yordadığı tespit edilmiştir. Sonuç olarak öğrencilerin basılı ve dijital okumaya yönelik tutumlarını geliştirmek için problemli medya kullanımının azaltılması ve dijital okuryazarlık becerilerinin arttırılması önerilmektedir.The general aim of this study is to reveal the role of digital literacy and problematic media use in primary school students' attitudes towards reading. The study group of the research consists of a total of 236 students, 122 of whom are 3rd graders and 114 of whom are 4th graders, and their parents who continue their educational activities in Bartın province. The personal information form developed by the researcher, the "Attitude Scale Towards Digital and Print Reading" adapted by Ciğerci et al. (2022) and the "Digital Literacy Scale for Primary School Students" developed by Şahin et al. Parents were administered the "Problematic Media Use Scale" adapted into Turkish by Furuncu and Öztürk (2020). The analysis of the research data was carried out using the SPPS 25 package program. In addition to descriptive statistics, t-test for independent groups and one-way analysis of variance (One Way ANOVA) were used for comparisons between groups. In addition, Pearson correlation analysis and multiple linear regression analysis were used to examine the relationships between variables. Cohen's d and Eta squared (?) calculations were used to calculate effect sizes. According to the findings obtained from the study, it was determined that primary school students' attitudes towards digital and print reading differed significantly according to their gender, the grade level they studied and the number of books they read in a year, while their problematic media use status differed significantly only according to their gender. A significant difference was found in digital literacy levels according to their gender and grade level. A low-level significant relationship was found between students' attitude scores towards digital and print reading and their problematic media use, and a medium-level significant relationship was found between their digital literacy. In addition, in line with the regression analysis results, it was determined that students' digital literacy skills and problematic media use significantly predicted their attitudes towards digital and print reading. As a result, it is recommended to reduce problematic media use and increase digital literacy skills to improve students' attitudes towards print and digital reading
Isothermal-oxidation behavior of vacuum-clad CrNiFeMoCo high-entropy alloy coating at 600-800 °C
No full textThe high-temperature oxidation behavior of vacuum cladding CrNiFeMoCo high-entropy alloy (HEA) coatings was investigated. The HEA coating has a strong metallurgical bonding with the substrate and an FCC + sigma eutectic structure. The HEA coating at 600 degrees C follows a single linear oxidation law, with k and n values of 4.15 x 10-5 mgn cm-2n min-1 and 1.118, while two steps make up the oxidation process at 700-800 degrees C: the initial stage of rapid oxidation and the steady-state stage of slow oxidation with lower k and higher n values. The oxidation product at 600 degrees C was Cr2O3, while oxidation products at 700-800 degrees C primarily consisted of Cr2O3 with a trace quantity of (Cr,Fe)2O3. The oxide layer's flat surface at 600 degrees C shows low-speed thickening behavior, while the oxide layer at 700-800 degrees C exhibits a two-stage thickening behavior: rapid thickening and densification during initial oxidation, and a low thickening rate during stable oxidation. The main oxidation mechanism is the prolonged interaction of O2 permeation, low oxide formation rate, and metal diffusion coefficient at 600 degrees C, while the HEA coating still exhibits excellent oxidation resistance at 700-800 degrees C due to the continuous generation and protection of dense oxidation products with Cr2O3 as primary oxide.The national natural Science foudation of China [51605230, 52371033]; National Natural Science Foundation of China (NSFC) [232102221022]; Key Research and Development and Promotion Special Project [YJS2025AL148]; Postgraduate Education Reform and Quality Improvement Project; Henan Province, China [23JCQY1001, 23JCQY2013]; Nanyang City Basic and Frontier Technology Research Special ProjectThis work was financially supported by the National Natural Science Foundation of China (NSFC) (Nos. 51605230 and 52371033), the Key Research and Development and Promotion Special Project (No. 232102221022) in Henan Province, China, the Postgraduate Education Reform and Quality Improvement Project (No. YJS2025AL148) of Henan Province, China, as well as the Nanyang City Basic and Frontier Technology Research Special Project (Nos. 23JCQY1001 and 23JCQY2013), in Henan Province, China
Experimental Investigation of Repair and Strengthening Methods on the Flexural Behavior of Damaged Reinforced Concrete Beams
No full textThis study experimentally investigates the effects of different repair and strengthening techniques on the flexural behavior of damaged reinforced concrete (RC) beams and concrete elements. The research consists of two phases: (i) epoxy injection was applied to flexurally damaged small-scale concrete specimens of varying strength classes; (ii) large-scale RC beams were first damaged under four-point flexural loading and then repaired using epoxy injection, GFRP, CFRP, and their combinations. All specimens were re-tested to evaluate strength and deformation recovery. The results showed that epoxy injection restored up to 97–118% of the original flexural strength in concrete samples and significantly increased flexural toughness. In RC beams, GFRP wrapping increased toughness by 365%, while the highest strength gains were obtained from GFRP wrapping (128.44%) and the CFRP wrapping combined with epoxy injection (127.5%). In conclusion, the findings indicate that various repair and strengthening methods can significantly improve strength and deformation capacity, offering effective solutions for post-earthquake structural rehabilitation. © 2025 Elsevier B.V., All rights reserved
Document Analysis of the Film "Atlı Karınca" in the Context of Sexual Abuse and Incest
No full textIncest is defined as a situation in which an individual is subjected to sexual abuse by family members or close relatives who are prohibited by law from marrying. To safeguard the mental and physical health of society and the family, including children, it is important to have an understanding of sexual abuse and incest, and to subsequently promote awareness at the societal level. In this academic study, the concept of sexual abuse and incest, frequently encountered and concealed within society, is explored with reference to the film Atlı Karınca. The study delves into the definition and characteristics of these phenomena, identifies the contributing risk factors, and analyzes the ensuing outcomes. This study is a research based on document analysis, one of the qualitative research designs. In the research, scenes from the film Atlı Karınca, which met the criteria of originality, credibility and representation, and data including written field notes taken by the researcher while watching the film were used. This study has arrived at the conclusion that, drawing from the existing scholarly literature on sexual abuse and incest, the scenes in the film Atlı Karınca concretely exemplify and elucidate the findings and consequences related to the concept of incest