Sakarya University of Applied Sciences AXSIS
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Philology Students’ Perceptions of Ethno-cultural Empathy and Intertextual Literary Heroes as Role Models
No full textThis study’s main aim is to examine the ethno-cultural empathy levels of philology students and how they perceive the heroes in literary works in terms of values and their tendency to adopt these heroes as role models. This study employed a descriptive relational survey, with participants comprising philology students from two state universities in Kazakhstan. Using the snowball sampling method, 285 voluntary students were included. The Scale of Ethno-cultural Empathy and the Role-Modeling Scale of Intertextual Heroes in Literary Works in Terms of Values were used to collect data. The findings showed that philology students exhibited high ethno-cultural empathy, with mean scores of 3.57 in Empathic Feeling and Expression, 3.32 in Empathic Perspective Taking and Acceptance of Cultural Differences, and 3.45 in Empathic Awareness. Their mean score on the Role-Modelling of Heroes scale was 3.28, indicating a limited tendency to adopt literary heroes as personal role models. Gender analysis revealed significantly higher empathic tendencies among female students, though no significant gender difference was found for role-modeling heroes. Third-and fourth-year students demonstrated greater empathy than first-and second-year students. Multiple regression analysis indicated that students’ role-modeling perceptions significantly predicted their ethno-cultural empathy levels, suggesting a positive contribution to empathy development. The study recommends enhancing ethno-cultural empathy and hero role modeling among philology students by selecting culturally diverse literature, planning character analysis activities, strengthening empathy programs, creating ethics-focused materials, fostering interdisciplinary collaborations, organizing reading groups, and using interactive digital platforms. © 2024, Florida Gulf Coast University. All rights reserved
Cam Elyaf Takviyeli Poli-fital-amit Polimer Kompozitlerin Aşınma ve Sürtünme Performanslarının Araştırılması
No full textEndüstrinin birçok alanında üretim makinalarında hareket iletiminde polimer ve polimer esaslı kompozit malzemelerden imal edilmiş dişliler kullanılmaktadır. Uygun malzeme çiftlerinin seçimi dişli mekanizmalarının çalışma ömrünü belirlemektedir. Yüksek performanslı poli-fital-amit (PPA) polimer ve PPA kompozitler kullanılarak makine elemanlarının ömrünü artıracaktır. Bu çalışmada, katkısız poli-fital-amit polimeri ile ağırlık olarak %30oranında cam elyaf takviyeli poli-fital-amit (PPA/%30GF) kompozitinin aşınma ve sürtünme performansları incelenmiştir. Aşınma deneyleri çelik diske karşı kuru ortam şartları altında gerçekleştirilmiştir. Cam elyaf takviyeli PPA kompoziti ikiz vidalı endüstriyel bir ekstruderde granül olarak üretilmiş ardından enjeksiyon makinasında aşınma test numuneleri basılmıştır. Aşınma testleri 0.5 ve 1.0 m/s kayma hızlarında, 20N, 30N ve 40N yükler altında yapılmıştır. Deneyler, pim-disk aşınma test cihazı kullanılarak ortam sıcaklığında gerçekleştirilmiştir. Aşınma testleri sonucunda, cam elyaf takviyeli PPA kompozitin sürtünme katsayısı ve aşınma oranı katkısız PPA polimerine göre daha düşük olduğu belirlenmiştir. Uygulanan yükün artması ile sürtünme katsayısı artarken hızın artması ile sürtünme katsayısı azalmıştır. Aşınma oranı ise uygulanan yük ve kayma hızının artması ile artmıştır. Uygulanan tribolojik test çalışma şartlarında %30oranında cam elyaf takviyeli poli-fital-amit katkısız PPA’ya göre ortalama da en az 5 kat dirençli olduğu tespit edilmiştir. Yani makine elemanı olan kullanılan dişlilerin çalışma ömrünün doğru malzeme kullanımı ile artırılabileceği sonucu çıkarılabilir
Neuroprotective Activity of Strawberry Tree (Arbutus unedo L.) Against Formaldehyde-Induced Oxidative Stress in The Rat Hippocampus; [Actividad Neuroprotectora del Madroño (Arbutus Unedo L.) contra el Estrés Oxidativo Inducido por Formaldehído en el Hipocampo de Rata]
No full textFormaldehyde induces oxidative damage in hippocampal tissue and blood serum by suppressing antioxidant defenses and increasing lipid peroxidation. This results in damage to DNA, proteins, and lipids within cells, disrupting neuronal functions, and may even lead to cell death (apoptosis). Apoptosis occurs as a cellular response triggered by formaldehyde through various mechanisms, including mitochondrial dysfunction, oxidative stress, and DNA damage. Arbutus unedo L. (AUL), which is rich in antioxidants, represents a potential countermeasure. The aim of our study is to investigate the immunohistochemical and biochemical effects of AUL fruit extract (AUE) on apoptosis and oxidative stress induced by FA exposure in the rat hippocampus. The rats were divided into four groups: the experimental group (EG) received 20 mg/kg AUE by oral gavage and 10 ppm FA inhalation; the formaldehyde group (FG) received 10 ppm FA inhalation only; the sham group (SG) received 10 mg/kg AUE by oral gavage; and the control group (CG) underwent routine observation. Hippocampal tissue was isolated after blood sampling. A number of physical changes, such as yellowing of feathers and tail spots, were observed in FA-exposed groups. The biochemical analysis showed significant differences in brain-derived neurotrophic factor (BDNF), malondialdehyde (MDA), GSH (Glutathione) and nitric oxide (NO) levels between the groups. The AUE-treated groups had reduced MDA levels, suggesting a potential reduction in oxidative stress, along with lower apoptotic cell rates in caspase-3 assessments. The FG rats had lower BDNF levels than CG. The SG had the fewest apoptotic cells. All these findings indicate AUE's potential to mitigate neuron damage and reduce oxidative stress. © 2024, Universidad de la Frontera. All rights reserved
Bibliometric analysis on hydrogen and ammonia: a comparative evaluation for achieving IMO's decarbonization targets
No full textIn the last decade, shipping emissions have emerged as a prominent contributor to climate change. In 2018, the IMO introduced a strategy encompassing short-, mid-, and long-term actions to address this issue. Future studies should prioritize clean alternative fuels to ensure adequate implementation supports the strategy's long-term objectives, effectively reducing shipping emissions. This study aimed to present a comprehensive evaluation of the carbon-neutral alternative fuels hydrogen and ammonia for reducing CO2 emissions from ships. Moreover, a bibliometric analysis was conducted using data obtained from the SCOPUS database to comprehend relevant topics, enhance collaboration networks, and determine research focal points. A total of 920 journal articles published from 2000 to December 2022 were retrieved and evaluated. The findings revealed that after the 2015 Paris Agreement and the IMO vision of 2018, the number of publications increased exponentially, leading to a continuous increase in the total number of publications to date. The searches conducted in the Scopus database using the keywords alternative fuels, hydrogen and ammonia in relation to maritime transportation indicate that researchers from the United States, China, and the United Kingdom collectively contributed to approximately 50% of the total scientific publications. The findings of this study shed light on the current state of research on hydrogen and ammonia as alternative fuels in the context of maritime transportation, providing invaluable references and insights to guide future studies, with the IMO's net-zero carbon emission targets serving as a critical cornerstone for identifying key research directions
Bioactive apatite–wollastonite glass ceramics coating on metallic titanium for biomedical applications: effect of boron
No full textMetallic titanium (Ti) implant surfaces need improvement for bioproperties and antibacterial behavior. For this purpose, a new boron-doped bioactive apatite–wollastonite (AW) coating was successfully developed on the Ti plate surface. The effects of boron addition on the microstructure, mechanical properties, and bioproperties of the AW coating were investigated. With the addition of boron (B), the AW coating morphology became less porous and compact. In terms of bio properties, the rate of apatite formation increased with the addition of B, and the cell viability rate increased from approximately 66–81%. B addition increased the elastic modulus of the AW coating from about 24–46 GPa and increased its hardness about 2.5 times. In addition, while no antibacterial activity was observed in the AW coating, the addition of boron slightly introduced antibacterial properties. The novel AW/B composite coating obtained is promising for Ti implant surfaces. © The Author(s), under exclusive licence to Society for Biological Inorganic Chemistry (SBIC) 2023
Thermal analyses and weight gain modeling study on Ti-Al - based intermetallic coated Ti6Al4V alloy
No full textTi6Al4V alloy is a commonly used alpha + beta alloy among titanium alloys. In this study, in order to improve the oxidation resistance of the Ti6Al4V alloy, Ti-Al - based aluminum coating was deposited to the surface by the pack cementation method. The aluminizing process was carried out in an open atmosphere oven at 700 degrees C for 4 and 6 h. It has been observed that the coating layer thickness varies between 13 and 17 mu m depending on the duration of cementation process. From XRD analysis, it has been detected the TiAl3, TiAl2, and TiAl phases on the coating layer. Aluminum coated and untreated Ti6Al4V alloys were subjected to oxidation tests at 800, 850, and 900 degrees C for 4, 20, and 40 h. The obtained nonlinear weight gain characteristic has been modeled to determine the coating status of the samples. It was determined that the highest weight gain was in the untreated sample. Using the provided model, samples were classified in terms of coating condition by systematic approach based on weight gain profile versus time. Oxidation tests also supported with DTA and TG analyses
Analysis of Caputo-Type Non-Linear Fractional Differential Equations and Their Ulam–Hyers Stability
No full textThis study presents two novel frameworks, termed a quasi-modular b-metric space and a non-Archimedean quasi-modular b-metric space, and various topological properties are provided. Using comparison and simulation functions, this paper rigorously proves several fixed point theorems in the non-Archimedean quasi-modular b-metric space. As a useful application, it also establishes Ulam–Hyers stability for the fixed point problem. Finally, this study concludes with a unique solution to a non-linear fractional differential equation, making a substantial contribution to the discipline. © 2024 by the authors
Obsessive-compulsive disorder and its association with work addiction and job stress
No full textBACKGROUND:Obsessive-compulsive disorder (OCD) which has come to the fore, especially with the COVID-19 pandemic is arguably neglected within the scope of working life. For this reason, there is a need for research in organizational psychology to examine OCB in working life. OBJECTIVE:The purpose of the present study was to examine the associations of OCD tendencies of employees with work addiction and job stress. METHODS:Quantitative research was designed to achieve the research purpose. A total of 771 white-collar employees completed a survey that included psychometric assessment tools for the three aforementioned variables. RESULTS:Correlation analysis indicated that OCD was positively associated with both work addiction (p < 0.001) and job stress (p < 0.001). Multiple regression analysis showed that the rumination (a subscale on the OCD scale) was significantly associated with work addiction (β= 0.39 p < 0.001) and job stress (β= 0.40 p < 0.001). CONCLUSION:The obtained findings are interpreted theoretically, empirically, and practically, and possible research suggestions regarding the examination of OCD in working life are discussed
Beta Vulgaris L. Extract: pH Effect on Total Phenolic Content and Antioxidant Properties
No full textRed beet (Beta vulgaris L.) is a rich source of phenolic content including colour pigments and have also high antioxidant capacities. The amounts of their phenolic substances and antioxidant activities change depending on the extraction conditions (pH, time, solvent, etc.). In this work, the coloured water extracts were obtained from red beet at different pH values (pH 4-10) for both an hour and 24 hours. The extracts were evaluated regarding antioxidant activities and total phenolic contents (TPC). The results showed that the total phenolic content of red beet extract in all extraction conditions ranged from 0.55±0.02 to 2.30±0.19 mg GAE/g FW. The highest total phenolic contents (2.30±0.19 mg GAE/g FW) were obtained from red beet at 24 h and pH=4. On the other hand, while the IC50 values for DPPH activity of red beet extracts at all pH values and times are between 0.84±0.04 and 5.44±0.75 mg/mL, the IC50 values for ABTS activity are between 1.46±0.42 and 3.65± 0.28 mg/mL. The extract obtained from red beet at 24 h and pH=4 exhibited the strongest DPPH activity with the IC50 values of 0.84±0.04 mg/mL, it showed the best ABTS activity with the IC50 values of 1.46±0.42 mg/mL at 24 h and pH=4
Three dimensional numerical analysis of soil nailed walls and machine learning approach
No full textDerin kazı çalışmalarında deplasmanları azaltmak ve stabiliteyi arttırmak için iksa yapılarına ihtiyaç duyulmaktadır. Zemin çivili duvarlar kazı çalışmalarında zeminin kayma mukavemetini arttırmak, deplasmanları azaltmak ve zemini kararlı hale getirmek için uygulanan iksa sistemleridir. Diğer iksa sistemlerinde olduğu gibi zemin çivili duvarlarla desteklenmiş kazı çukurları da doğası gereği üç boyutlu ortamlardır. Çalışma kapsamında zemin çivili duvarın gerçeğe en yakın şekilde temsil edilebilmesi amacıyla üç boyutlu araştırmalar gerçekleştirilmiştir. Bu amaçla Tepe AVM projesi zemin çivili duvarın zemin, geometri, çivi uygulama koşulları ile uyumlu Plaxis 2D v.23 iki boyutlu ve Plaxis 3D v.23 üç boyutlu sonlu elemanlar model örnekleri oluşturulmuş ve inklinometre ölçüm sonuçları ile model doğruluğu sağlanmıştır. Parametrik araştırmalar aşamasında öncelikle kazı çukuru boyutlarının deplasmanlar ve köşe etkisini temsil eden düzlem-gerinim oranı (PSR) üzerine etkisi ortaya koyulmuştur. Ardından Plaxis 3D v.23 yazılımı ile 336 adet düzlem-gerinim dilim model ve 336 adet üç boyutlu modeller oluşturulmuştur. Gerçekleştirilen parametrik analiz çalışmaları ile arka şev açısı (β), iksa duvar açısı (α), çivi boyu (L/H), kazı derinliği (H) ve köşeden uzaklık (xH) değişken koşulları altında zemin çivili duvarların deplasman ve güvenlik sayısı yönünden nasıl etkilendiği belirlenmiştir. Bununla birlikte zemin çivili duvarlarda düzlem-gerinim oranı (PSR) ve köşe etkisi belirlenmiştir. Aynı değişken koşullara bağlı olarak çivilere gelen maksimum eksenel kuvvetlerin köşeden uzaklaştıkça nasıl değiştiği tespit edilmiştir. Düzlem-gerinim ve üç boyutlu modellerde yapılan deplasman ve güvenlik sayısı sonuçları üzerinde Pearson korelasyon analizi yapılmıştır. Korelasyon analizleri ile her bir parametrenin ikili monotonik ilişkisinin gücü ve yönü saptanmıştır. Ardından makine öğrenmesi yöntemleri olan; yapay sinir ağları (ANN), sınıflama ve regresyon ağacı (CART), destek vektör regresyonu (SVR), ekstrem gradyan artırma (XGBoost) ve hafif gradyan artırma (LightGBM) tahmin modelleriyle %99 güvenilirliği kanıtlanmış deplasman, güvenlik sayısı ve çivi boyu tahmin çalışmaları gerçekleştirilmiştir. Bu tez çalışması ile zemin çivili duvarlarda deplasmanlar, güvenlik sayısı ve çivilere gelen maksimum eksenel kuvvetlerin (köşe etkisini de dikkate alarak) üç boyutlu koşullar altında davranışı belirlenmiştir. Zemin çivili duvarların tasarımlarında kılavuz oluşturabilecek bir çalışma ortaya koyulmuştur. Anahtar Kelimeler: Zemin çivisi, Zemin çivili duvar, Plaxis 3D, Yanal deplasmanlar, Güvenlik sayısı, Sonlu elemanlar analizi, Köşe etkisi, PSR, Makine öğrenmes