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Investigation of the relationship between kinesophobia and pain coping status of patients with gonarthrosis and pain and mobility levels during the first post-operative
No full textAraştırma gonartrozlu hastaların ameliyat öncesi kinezyofobi ve ağrıyla baş etme durumları ile ameliyat sonrası ilk mobilizasyon sırasındaki ağrı ve fiziksel hareketlilik düzeyleri arasındaki ilişkinin incelenmesi amacıyla yapıldı. Tanımlayıcı ve ilişki arayıcı nitelikteki bu araştırma Batı Karadeniz Bölgesindeki bir devlet hastanesinin ortopedi ve travmatoloji kliniğinde gonartroz tanısı ile yatan 202 hasta ile gerçekleştirildi. Veriler 1 Mart 2023 – 31 Ocak 2024 tarihleri arasında ''Demografik Bilgi Formu '', ''Tampa Kinezyofobi Ölçeği'', ''Ağrıyla Başetme Envanteri'', '' Vizuel Analog Skala (VAS) '' ve "Gözlemci Hareketlilik Ölçeği" ve "Hasta Hareketlilik Ölçeği" kullanılarak toplandı. Hastalar ile ameliyattan önce ve ameliyat sonrası ilk mobilizasyonun hemen ardından yüz yüze görüşülerek veri toplama formları dolduruldu. Hastaların ölçek düzeylerini belirleyen boyutlar arasındaki ilişkiler pearson korelasyon ve lineer regresyon analizleri ile test edildi. Hastaların tanımlayıcı özelliklerine göre ölçek düzeylerindeki farklılaşmaların incelenmesinde bağımsız gruplarda t-testi, ANOVA ve Tukey LSD analizlerinden yararlanıldı. Hastaların ameliyat öncesinde TAMPA Kinezyofobi Ölçeğinden aldıkları 45,800 ± 5,318 puan ile kinezyofobileri orta düzeydeydi. Hastaların Ağrıyla Başetme Envanterinden toplam 51,891 ± 6,888 puan aldıkları ve buna göre ağrıyla başetme davranışlarını kullanma oranı yüksek düzeyde olduğu bulundu. Ameliyat öncesi VAS ile ölçülen ağrı şiddeti ortalama 7,630±1,951 ile yüksek düzeydeydi. İlk mobilizasyon sırasında Gözlemci Hareketlilik Ölçeğinden alınan ortalama 12,120 ± 1,951 puan ile hastalar orta düzeyde hareket etme bağımsızlığına sahipti. Hasta Hareketlilik Ölçeğinden alınan ortalama 24,680 ± 5,379 ile de hastaların hareket ederken yüksek düzeyde ağrı ve güçlük deneyimledikleri belirlendi. Hastalardaki ameliyat öncesi kinezyofobi ile ağrıyla başetme davranışlarını kullanma ve deneyimlenen ağrı şiddeti arasında istatistiksel olarak anlamlı ilişki saptandı (p<0,05). Ameliyat sonrası ilk mobilizasyon sırasındaki Gözlemci Hareketlilik Ölçeği ve Hasta Hareketlilik Ölçeği puan ortalamaları ile VAS puan ortalamaları arasında istatistiksel olarak anlamlı ilişki tespit edildi (p<0,05). Hastaların TAMPA Kinezyofobi Ölçeği puan ortalamaları ile Hasta Hareketlilik Ölçeği puan ortalamaları arasında da istatistiksel anlamlı ilişki saptandı (p<0,05). Sonuçlar doğrultusunda hastalara cerrahi sonrası hareket etmenin önemini anlatılarak hastalar hareket etme konusunda cesaretlendirmeli, hastaların hareket etmelerini kısıtlayabilecek faktörlerin farkında olunmalı; bu faktörleri yönetmeye yönelik hemşirelik girişimlerinde bulunmalıdır. Hasta bireylerin özellikle ağrı ile aktif başetme yöntemlerini için motive edilmeli ya da eğitim verilmelidir. Hastaların ölçek düzeylerini belirleyen boyutlar arasındaki ilişkiler pearson korelasyon ve lineer regresyon analizleri ile test edildi. Hastaların tanımlayıcı özelliklerine göre ölçek düzeylerindeki farklılaşmaların incelenmesinde bağımsız gruplarda t-testi, ANOVA ve Tukey LSD analizlerinden yararlanıldı. Hastaların ameliyat öncesinde TAMPA Kinezyofobi Ölçeğinden aldıkları 45,800 ± 5,318 puan ile kinezyofobileri orta düzeydeydi. Hastaların Ağrıyla Başetme Envanterinden toplam 51,891 ± 6,888 puan aldıkları ve buna göre ağrıyla başetme davranışlarını kullanma oranı yüksek düzeyde olduğu bulundu. Ameliyat öncesi VAS ile ölçülen ağrı şiddeti ortalama 7,630±1,951 ile yüksek düzeydeydi. İlk mobilizasyon sırasında Gözlemci Hareketlilik Ölçeğinden alınan ortalama 12,120 ± 1,951 puan ile hastalar orta düzeyde hareket etme bağımsızlığına sahipti. Hasta Hareketlilik Ölçeğinden alınan ortalama 24,680 ± 5,379 ile de hastaların hareket ederken yüksek düzeyde ağrı ve güçlük deneyimledikleri belirlendi. Hastalardaki ameliyat öncesi kinezyofobi ile ağrıyla başetme davranışlarını kullanma ve deneyimlenen ağrı şiddeti arasında istatistiksel olarak anlamlı ilişki saptandı (p<0,05). Ameliyat sonrası ilk mobilizasyon sırasındaki Gözlemci Hareketlilik Ölçeği ve Hasta Hareketlilik Ölçeği puan ortalamaları ile VAS puan ortalamaları arasında istatistiksel olarak anlamlı ilişki tespit edildi (p<0,05). Hastaların TAMPA Kinezyofobi Ölçeği puan ortalamaları ile Hasta Hareketlilik Ölçeği puan ortalamaları arasında da istatistiksel anlamlı ilişki saptandı (p<0,05). Sonuçlar doğrultusunda hastalara cerrahi sonrası hareket etmenin önemini anlatılarak hareket etme konusunda cesaretlendirmeli, hastaların hareket etmelerini kısıtlayabilecek faktörlerin farkında olunmalı; bu faktörleri yönetmeye yönelik hemşirelik girişimlerinde bulunmalıdır. Hasta bireylerin özellikle ağrı ile aktif başetme yöntemlerini için motive edilmeli ya da eğitim verilmelidir. Anahtar Kelimeler: Ağrı, gonartroz, hareketlilik, hemşirelik, kinezyofobi, mobilizasyonThe aim of this study was to investigate the relationship between preoperative kinesiophobia and pain coping status of patients with gonarthrosis and their pain and physical mobility levels during the first postoperative mobilisation. This descriptive and correlational study was conducted with 202 patients hospitalised in the orthopaedics and traumatology clinic of a state hospital in the Western Black Sea Region with a diagnosis of gonarthrosis. Data were collected between 1 March 2023 and 31 January 2024 using the "Demographic Information Form", "Tampa Kinesiophobia Scale", "Pain Coping Inventory", "Visceral Analogue Scale (VAS)", "Observer Mobility Scale" and "Patient Mobility Scale" were used. Patients were interviewed face to face before surgery and immediately after the first postoperative mobilisation and data collection forms were filled out. The relationships between the dimensions determining the scale levels of the patients were tested by Pearson correlation and linear regression analyses. Independent groups t-test, ANOVA and Tukey LSD analyses were used to examine the differences in scale levels according to the descriptive characteristics of the patients. The patients had moderate level of kinesiophobia with a preoperative score of 45.800 ± 5.318 on the TAMPA Kinesiophobia Scale. The patients scored a total of 51,891 ± 6,888 points from the Pain Coping Inventory and accordingly, the rate of using pain coping behaviours was found to be at a high level. Preoperative pain intensity measured by VAS was at a high level with a mean of 7,630±1,951. During initial mobilisation, patients had a moderate level of mobility independence with a mean score of 12,120 ± 1,951 on the Observer Mobility Scale. With a mean score of 24,680 ± 5,379 on the Patient Mobility Scale, patients experienced high levels of pain and difficulty while moving. There was a statistically significant correlation between preoperative kinesiophobia and the use of pain coping behaviours and the severity of pain experienced (p<0.05). A statistically significant correlation was found between the mean scores of the Observer Mobility Scale and Patient Mobility Scale and the mean VAS scores during the first postoperative mobilisation (p<0.05). A statistically significant relationship was also found between the mean scores of the TAMPA Kinesiophobia Scale and the mean scores of the Patient Mobility Scale (p<0.05). According to the results, patients should be encouraged to move by explaining the importance of moving after surgery, be aware of the factors that may restrict patients' mobility, and nursing interventions should be made to manage these factors. Patients should be motivated or trained for active coping methods especially with pain. The relationships between the dimensions determining the scale levels of the patients were tested with Pearson correlation and linear regression analyses. In the examination of differences in scale levels according to the descriptive characteristics of the patients, independent groups t-test, one-way analysis of variance and Tukey LSD analyses were used. The patients' kinesiophobia was at a moderate level before surgery, with a score of 45.800 ± 5.318 on the TAMPA Kinesiophobia Scale. It was found that the patients received a total average score of 51.891 ± 6.888 from the Pain Coping Inventory on the morning of surgery and accordingly the rate of using pain-coping behaviors was at a high level. Preoperative pain intensity measured with VAS was high with an average of 7.630±1.951. During the first mobilization, the patients had a moderate level of mobility independence with an average score of 12.120 ± 1.951 on the Observer Mobility Scale. It was determined that the patients experienced high levels of pain and difficulty while moving with an average score of 24.680 ± 5.379 from the Patient Mobility Scale. A statistically significant relationship was found between the preoperative kinesiophobia in the patients and the use of pain coping behaviors and the experienced pain intensity (p<0.05). A statistically significant relationship was found between the Observer Mobility Scale and Patient Mobility Scale mean scores and the VAS mean scores during the first mobilization after the surgery (p<0.05). A statistically significant relationship was also found between the patients' TAMPA Kinesiophobia Scale mean scores and the Patient Mobility Scale mean scores (p<0.05). According to the results, patients should be encouraged to move by explaining the importance of movement after surgery. They should also be aware of factors that may limit their movement; nursing interventions should be made to manage these factors. Patients should be motivated or trained, especially for active methods of coping with pain. Keywords: Pain, gonarthrosis, mobility, nursing, kinesiophobia, mobilizatio
The effect of flip learning supported gamified peer teaching on students' achievement, motivation and social skills in primary school mathematics course
No full textBu araştırmanın amacı ilkokul matematik dersinde ters yüz öğrenme destekli oyunlaştırılmış akran öğretimi kullanımının öğrencilerin ders başarısı, derse yönelik motivasyonları ve sosyal becerileri üzerindeki etkisini incelemektir. Araştırmada karma araştırma desenlerinden açıklayıcı sıralı desen kullanılmıştır. Araştırmanın nicel boyutu için ön-test son-test kontrol gruplu yarı deneysel desen kullanılmıştır. Nitel boyutu ise durum çalışması şeklinde yürütülmüştür. Araştırma, 2023-2024 eğitim-öğretim yılı bahar döneminde Bartın ilinde yer alan bir devlet okulunda ilkokul üçüncü sınıf düzeyinde öğrenim gören toplam 87 öğrenci ile gerçekleştirilmiştir. Bir deney (DG, n=29) ve iki kontrol grubu (KG-1, n=29; KG-2, n=29) ile yürütülen çalışmanın deneysel süreci 8 hafta sürmüştür. Deney grubunda matematik dersleri ters yüz öğrenme modeli temele alınarak işlenmiş ve bu model sınıf içinde oyunlaştırılmış akran öğretimi ile desteklenmiştir. Sınıf dışındaki ders hazırlığı ve ders sonrasındaki pekiştirme aktivitelerinin gerçekleştirilmesinde öğrenci velileri ile iş birliği yapılmıştır. Kontrol grubuna ise herhangi bir müdahalede bulunulmamış, mevcut öğretim programı doğrultusunda dersler yürütülmüştür. Araştırmanın nicel verileri "Matematik Başarı Testi", "Matematik Motivasyon Ölçeği" ve "Sosyal Beceri Ölçeği" nitel veriler ise "Öğrenci Görüşme Formu" ve "Veli Görüşme Formu" kullanılarak toplanmıştır. Elde edilen nicel veriler Bağımlı Örneklemler İçin T testi, Varyans Analizi (ANOVA) ve Kovaryans Analizi (ANCOVA) kullanılarak, yarı yapılandırılmış görüşmelerden elde edilen nitel veriler ise içerik analizi ile çözümlenmiştir. Araştırmanın sonucunda matematik ders başarısı ve motivasyon değişkeninin alt boyutlarından konu değeri ve sınav kaygısı açısından ters yüz öğrenme destekli oyunlaştırılmış akran öğretiminin kullanıldığı deney grubu lehine anlamlı farklılıklar bulunmuştur. Benzer şekilde deney grubundaki öğrencilerin matematik başarı düzeylerinin kontrol grubuna göre anlamı düzeyde yüksek olduğu saptanmıştır. Ancak sosyal beceri değişkeni açısından ise deney ve kontrol grupları arasında anlamlı bir farklılık olmadığı tespit edilmiştir. Araştırmada öğrencilerin çoğu ters yüz öğrenme destekli oyunlaştırılmış akran öğretiminin öğrencilerin bilişsel ve duyuşsal becerilerine olumlu etkisinin olduğuna, heyecan hissi uyandırdığına ve dersi daha eğlenceli hale getirdiğine yönelik görüş bildirmişlerdir. Ayrıca akran öğretiminde öğretmen rolünün, rekabet hissinin ve dersin "Kulami" oyunu ile bütünleştirilmesinin beğendikleri özellikler olduğuna dikkat çekmişlerdir. Araştırma ters yüz öğrenme modelinin velilerle iş birliği yapılarak temel eğitim kademesinde de uygulanabilirliğine yönelik kanıtlar sunmaktadır. Araştırmada bulgular doğrultusunda eğitsel çıkarımlara ve önerilere de yer verilmiştir.The aim of this research is to examine the effects of using gamified peer instruction supported by flipped learning in primary school mathematics course on students' course success, motivation towards the course, and social skills. An explanatory sequential design, one of the mixed research designs, was used in the research. A quasi-experimental design with a pre-test-post-test control group was used for the quantitative dimension of the research. The qualitative dimension was conducted as a case study. The research was conducted with a total of 87 students studying at the third grade level of primary school in a public school located in Bartın province in the spring semester of the 2023-2024 academic year. The experimental process of the study, which was conducted with one experimental (DG, n=29) and two control groups (KG-1, n=29; KG-2, n=29), lasted 8 weeks. Mathematics lessons in the experimental group were taught based on the flipped learning model and this model was supported by gamified peer instruction in the classroom. Cooperation was made with the parents of the students in lesson preparation outside the classroom and reinforcement activities after the lesson. No intervention was made to the control group, and lessons were conducted in accordance with the current curriculum. The quantitative data of the study were collected using the "Mathematics Course Academic Success Test", "Mathematics Motivation Scale" and "Social Skills Scale", and the qualitative data were collected using the "Student Interview Form" and "Parent Interview Form". The quantitative data obtained were analyzed using the T-test for Dependent Samples, Analysis of Variance (ANOVA) and Analysis of Covariance (ANCOVA), and the qualitative data obtained from the semi-structured interviews were analyzed using content analysis. As a result of the study, it was observed that there were significant differences in favor of the experimental group in which gamified peer instruction supported by flipped learning was used in terms of subject value and exam anxiety as sub-dimensions of motivation. Similarly, it was determined that the mathematics achievement levels of the students in the experimental group were significantly higher than the control group. However, it was determined that there was no significant difference between the experimental and control groups in terms of the social skill variable. In the study, most of the students stated that gamified peer instruction supported by flipped learning had a positive effect on the students' cognitive and affective skills, created a sense of excitement and made the lesson more fun. They also noted that the teacher role in peer teaching, the sense of competition and the integration of the lesson with the "Kulami" game were the features they liked. The research provides evidence for the applicability of the flipped learning model in cooperation with parents at the primary education level. Educational implications and suggestions were also included in line with the findings of the research
Eco-friendly biogenic silver nanoparticles: synthesis, characterization and biological applications
No full textRecent developments in nanotechnology and nanoscience in all phases of human life have radically altered the diagnosis, treatment, and prevention of numerous diseases. Silver nanoparticles (Ag-NPs) have been among the most dynamic, and Several metallic nanoparticles developed for biological uses include some beautiful nanomaterials. Ag-NPs have played a pivotal role in nanotechnology and nanoscience, mostly nanomedicine. In this work, Ficus carica leaf extract was utilized to create silver nanoparticles using a straightforward procedure. This study explored the reduction of silver ions by F. carica leaf extract in the solution. UV-Vis spectroscopy, XRD analysis, and STEM characterize prepared biogenic Ag-NPs. Afterward, antibacterial and antibiofilm properties were investigated. The images obtained from STEM analysis surveyed that the NP sizes ranged from 11 to 20 nm. Ag-NPs demonstrated antibacterial and antibiofilm activities against all tested Gram-positive and Gram-negative bacteria strains. It has been indicated that Ag-NPs have inhibitory potency against collagenase activity. Ag-NPs exhibited anticancer activity in the HeLa cell line, and the IC50 value was calculated as 8.403 mu g/mL. In this study, it has been shown that the synthesis method is environmentally friendly, fast, safe, and easy to use
Tribological response of pack-boronized inconel 601 superalloy surfaces at elevated temperatures
No full textInconel 601 superalloy sample surfaces were pack-borided at 1000 degrees C for 4 h and 6 h to investigate the effect of boriding treatment on the mechanical and high temperature wear performance. The boride layers were characterized using SEM, EDS, XRD, microhardness tests, nanoindentation and high-temperature wear tests at room temperature and 500 degrees C under 7 N and 15 N normal loads. Boriding led to nearly 300 % increase in the hardness and up to 11-fold increase in the wear performance of the Inconel 601 surfaces. Despite lower COF and specific wear rates, borided surfaces were more susceptible to temperature increase than the non-treated Inconel 601 surfaces due to the lower tendency of wear debris with hard phase content to form a consistent lubricating layer
Comparative study of heat treatment routes for enhancing high-temperature wear resistance of EBM-processed Inconel 718
No full textAdditive manufacturing of nickel-based superalloys such as Inconel 718 via electron beam melting (EBM) has gained increasing attention for aerospace applications; however, challenges related to surface hardness and hightemperature wear resistance remain, highlighting the need for systematic post-processing strategies. In this study, the effects of several post-processing heat treatments-solutionizing, solutionizing + aging, boronizing, and boronizing + aging-on the microstructure and high temperature wear behavior applied of electron beam melting (EBM) additive-manufactured Inconel 718 were investigated. The materials were characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), microhardness measurements, and high-temperature wear tests. The results showed that solutionizing and solutionizing + aging produced a more homogeneous structure compared to the as-built condition, while boronizing and boronizing + aging significantly increased the surface hardness, leading to a notable improvement in hightemperature wear resistance. The wear resistance followed the order: boronizing, boronizing + aging, solutionizing + aging, solutionizing, and as-built condition. The improvement in wear resistance through aging after solutionizing was attributed to the microstructural refinement involving the formation of gamma' and gamma precipitates and carbides, which improved the strength and wear resistance. However, aging after boronizing weakened the hard boride layer due to coarsening and localized diffusion of boron into the core. Hardness played a crucial role in the effective wear mechanism: abrasive wear was prevalent in the as-built, solutionized, and solutionized + aged specimens, whereas microcracking was a significant mechanism in the boronized and boronized + aged specimens. With increased wear test temperature, oxidative wear and adhesive transfer became more pronounced, regardless of the post-processing treatment.Swedish Governmental Agency of Innovation Systems (Vinnova)The authors are grateful to Joakim Algardh of GE Additive, Sweden for providing the EBM-built specimens. One of the authors (SJ) would like to acknowledge the support from Swedish Governmental Agency of Innovation Systems (Vinnova) for the project Centre for Additive Man-ufacturing- Metal (CAM2) as a part of which this work was performed
Development and psychometric evaluation of transition of care for older adults scale: Barriers and facilitators (TOCAS-BF)
No full textBackground: Healthcare systems strive to improve hospital-to-home transitions for older adults, but existing tools often miss key facilitators and barriers. Therefore, this study aimed to develop a tool for assessing the facilitators of and barriers to effective transitional care for older adults and to evaluate its psychometric properties. Methods: A methodological study was conducted from September 2023 to February 2024 with 229 older adult volunteers to develop and test the tool. Results: The Transition of Care for Older Adults Scale is a 32-item scale with a 4-factor structure accounting for 52 % of the total variance explained. The indicators of confirmatory factor analysis were satisfactory. Cronbach's alpha coefficient for reliability was 0.925, indicating an optimal score. Conclusion: The Transition of Care for Older Adults Scale supports nurses in improving discharge planning, follow-up, and family support, while aiding educators in teaching strategies and researchers in studying care models and policies. (c) 2025 Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies
Effects of waste ferrochrome slag on the pyshıcal, mechanıcal, thermal and mıcrostructural propertıes of foam concret
No full textİnşaat sektöründe en yaygın olarak kullanılan yapı malzemesi betondur. Beton ise üretim teknolojisinde önemli gelişmeler gösteren ve oluşan farklı ihtiyaçlara cevap verebilen özel betonlar üretilmesine imkan veren bir malzeme haline gelmiştir. Bu ihtiyaçlara cevap verebilen ve üretilen özel betonlardan bir tanesi de köpük betondur. Köpük beton ise harç ve köpük ajanının bir birine ilave edilmesiyle elde edilen özel bir beton türüdür. Bununla birlikte inşaat sektöründeki ilerlemelere paralel olarak köpük betona daha iyi özelliklere sahip yeni malzemeler de entegre edilebilmektedir. Beton üretiminde kullanılan bileşenler arasında en büyük oran agregaya aittir ve agrega üretiminde doğal kaynakların kullanılması bu kaynakların zamanla azalmasına sebep olmaktadır. Bunun sonucu olarak gelecekte standartlara uygun agrega ulaşılması zorlaşacaktır. Beton üretimine olan talebin her geçen gün artmasıyla agrega ihtiyacı giderek derinleşmektedir. Azalan doğal agrega kaynaklarına karşın artan agrega üretimi beraberinde enerji tüketimi ile CO2 salınımı arttırmakta ve maliyet oluşturmaktadır. Bu sebeple atık ürünlerin inşaat sektöründe değerlendirilmesi gerekliliği ortaya çıkmaktadır. Ayrıca günümüzün en büyük problemlerinden biri hızlı tüketime bağlı olarak ortaya çıkan atık ürünlerin bertaraf edilmesidir. Ferrokrom üretimi neticesinde atık ürünlerin meydana geldiği tesislerden biri Elazığ ili Maden ilçesinde yer alan Eti Krom A.Ş’dir. Tesiste ferrokrom üretimine paralel olarak birçok yan ürün oluşmaktadır. Oluşan yan ürünlerden ferrokrom cürufunun inşaat sektöründe değerlendirilmesi hedeflenmiş ve atık ferrokrom cürufu köpük betona entegre edilmiştir. Çalışma kapsamında karışımların çimento dozajı 500 kg/m3 olarak belirlenmiş ve ferrokrom cürufu kırmataş agregası yerine ağırlıkça %0, %50 ve %100 oranlarında karışımlara ilave edilmiştir. Köpük içeriği karışımlarda 25 kg/m3 ve 50 kg/m3 olacak şekilde iki farklı oranda kullanılmıştır. Üretilen köpük beton numuneleri üzerinde fiziksel, mekaniksel, ısıl ve mikroyapısal testler gerçekleştirilmiş olup ayrıca maliyet analizi, gömülü enerji ve gömülü CO2 değerleri araştırılmıştır. Bu tez çalışması kapsamında, kuru birim hacim ağırlıkların 995-1050 kg/m3, 28 günlük basınç dayanımlarının 10,13-17,68 MPa ısıl iletkenlik katsayılarının 0,228-0,246 W/mK aralığında değiştiği tespit edilmiştir. Maliyet ve sürdürülebilirlik açısından köpük beton içerisinde ferrokrom cürufunun kullanılması ise faydalı sonuçlar vermiştir. Elde edilen sonuçlar köpük beton içerisinde ferrokrom cürufunun değerlendirilmesinin mümkün olduğunu göstermiştir.The most commonly used building material in the construction sector is concrete. Concrete has become a material that allows the production of special concretes that show significant developments in production technology and can meet different needs. One of the special concretes that can meet these needs and are produced is foam concrete. Foam concrete is a special type of concrete obtained by adding mortar and foaming agent to each other. However, in parallel with the developments in the construction sector, new materials with better properties can be integrated into foam concrete. The largest proportion among the components used in concrete production belongs to aggregate, and the use of natural resources in aggregate production causes these resources to decrease over time. As a result, it will be difficult to reach aggregates that comply with the standards in the future. As the demand for concrete production increases day by day, the need for aggregate is gradually deepening. Despite the decreasing natural aggregate resources, increasing aggregate production increases energy consumption and CO2 emissions and creates costs. For this reason, the necessity of evaluating waste products in the construction sector has emerged. In addition, one of the biggest problems of today is the disposal of waste products resulting from rapid consumption. One of the facilities where waste products are produced as a result of ferrochrome production is Eti Krom A.Ş. located in Maden district of Elazığ province. Many by-products are produced in parallel with ferrochrome production in the facility. It was aimed to evaluate the ferrochrome slag from the by-products formed in the construction sector and the waste ferrochrome slag was integrated into foam concrete. Within the scope of the study, the cement dosage of the mixtures was determined as 500 kg/m3 and ferrochrome slag was added to the mixtures at 0%, 50% and 100% by weight instead of crushed stone aggregate. Foam content was used in the mixtures at two different rates as 25 kg/m3 and 50 kg/m3. Physical, mechanical, thermal and microstructural tests were performed on the produced foam concrete samples and also cost analysis, embodied energy and embodied CO2 values were investigated. Within the scope of this thesis, it was determined that dry unit weights varied between 995-1050 kg/m3, 28-day compressive strengths varied between 10.13-17.68 MPa and thermal conductivity coefficients varied between 0.228-0.246 W/mK. In terms of cost and sustainability, the use of ferrochrome slag in foam concrete yielded beneficial results. The results obtained showed that it is possible to evaluate ferrochrome slag in foam concrete
Optimization of Filter Parameters for a MEMS IMU Accelerometer Using an Artificial Immune System
No full text6th International Conference on Artificial Intelligence, Robotics, and Control, AIRC 2025 -- Savannah; GA; Georgia Southern University -- 210525Georgia Southern University; IEEEA new filter parameter optimization approach is proposed for accelerometers. Filter parameters are optimized by comparing accelerometer data with experimental acceleration values using an artificial immune system (AIS)-based algorithm. The cut-off frequency and the order of the filter can be determined in different acceleration ranges depending on the dataset. A Butterworth low-pass filter is used in simulations, but the proposed approach can easily be extended to the other filter types. Experimental test results confirm that the proposed algorithm can reach the minimum absolute mean error and the global minimum after a few iterations. © 2025 Elsevier B.V., All rights reserved
Prevalence of Stress, Anxiety, Depression, and Sleep Quality Among Young Adults in Turkiye: A Cross-Sectional Study
No full textAim: The current study was conducted to measure the prevalence of stress, anxiety, depression, and sleep quality and identify predisposing factors of psychological distress among young adults during the pandemic. Methods: A cross-sectional design was adopted. The target population consisted of students studying at an associate degree health services school at a university in Turkiye. Overall, 704 students were included in the sample. Multiple logistic regression was implemented to predict risk factors. Results: The prevalence of moderate to extremely severe stress, anxiety, and depression was found to be 39%, 48.4% and 47.6%, respectively. There was a strong positive association between stress and anxiety (r = 0.869, p < 0.001), stress and depression (r = 0.912, p < 0.001), and between anxiety and depression (r = 0.857, p < 0.001). A moderate positive relationship was found between sleep quality and stress (r = 0.484, p < 0.001), sleep quality and anxiety (r = 0.484, p < 0.001), and sleep quality and depression (r = 0.481, p < 0.001). Young adults with poor sleep quality, those who find safety measures for the pandemic outbreak insufficient, those who use alcohol, and those who feel despair were more likely to have stress, anxiety, and depression risk. Age and gender did not affect their stress, anxiety, or depression risk. Conclusions: Nearly half of the young adults experienced varying degrees of stress, anxiety, and depression, and most had poor sleep quality. The insufficiency of outbreak measures, poor sleep quality, using alcohol, and feelings of despair were mutual predictive factors of stress, anxiety, and depression
A Detailed Karyological Investigation of three Endemic Cobitis Linnaeus, 1758 Species (Teleostei, Cobitidae) in Anatolia, Turkiye
No full textIntroduction: Comparative cytogenetics is a vital approach for diagnosing chromosome abnormalities and identifying species-specific patterns. In this study, chromosomal analysis of three Anatolian endemic Cobitis species was performed: Cobitis bilseli, C. fahireae, and C. turcica. Methods: Conventional cytogenetic techniques such as Giemsa staining, C-banding, and Ag-NOR staining were applied, followed by measurements of chromosome arm lengths including analysis of the measured data. Results: The diploid chromosome number, 2n = 50, was determined for all three species. The karyotype formulas were as follows: four pairs of metacentric, 5 pairs of submetacentric, and 16 pairs of subtelo-telocentric chromosomes in C. bilseli; 11 pairs of metacentric, 7 pairs of submetacentric, and 7 pairs of subtelo-telocentric chromosomes in C. fahireae; and 4 pairs of metacentric, 4 pairs of submetacentric, and 17 pairs of subtelo-telocentric chromosomes in C. turcica. Dark C-bands were observed on the pericentromeres of nearly all chromosomes in C. bilseli and C. turcica, whereas light C-bands appeared on the pericentromeres of some chromosomes in C. fahireae. Silver-stained metaphases revealed signals on the short arm of a submetacentric chromosome pair in C. fahireae (each homologous chromosome carries one signal), while in C. bilseli and C. turcica, Ag-NOR signals were detected on the long arm of a single metacentric chromosome (only one homologous chromosome carries the signal, and the signal-carrying chromosome is the largest chromosome in the karyotype). Conclusion: This study provides new cytogenetic data consistent with the phylogenetic distances between the studied species, indicating that pericentric inversions and/or translocations govern the formation of Cobitis karyotypes. (c) 2024 The Author(s).Published by S. Karger AG, BaselBartimath;n University Scientific Research Projects [2019-FEN-B-006]; Kirsehir Ahi Evran University Scientific Research Projects [SYO.A4.21.006]; PJAC project MSCA Fellowships CZ-UK [CZ.02.01.01/00/22_010/0002902]This study was supported by Bart & imath;n University Scientific Research Projects, project code: 2019-FEN-B-006 (S.U.K.), Kirsehir Ahi Evran University Scientific Research Projects, project code: SYO.A4.21.006 (M.K.A.), and the PJAC project MSCA Fellowships CZ-UK, CZ.02.01.01/00/22_010/0002902 (M.K.)