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New postoperative atrial fibrillation after cardiac surgery: Revealing new risk factors
No full text[No abstract available
Molecular and pathogenic characterization of Fusarium oxysporum f. sp. pisi isolates obtained from Turkey (vol 171, pg 37, 2024)
No full text[No abstract available
Effects of Liquid Sloshing in Storage Tanks: An Overview of Analytical, Numerical, and Experimental Studies
No full textLiquid storage tanks are essential components widely used across various industrial sectors. In addition to the internal liquid pressure and weight, these tanks are influenced by several external factors, such as wind, seismic activity, and temperature. The sloshing problem, which arises from the combined or individual effects of these external factors, presents a significant challenge for liquid storage tanks. This study aims to investigate sloshing phenomena by focusing on prominent studies in the literature. In the initial sections of the study, sloshing behaviour and key parameters are briefly introduced, followed by a discussion of the methods related to the modelling of sloshing. Subsequently, literature studies focusing on cylindrical and rectangular upright tanks related to sloshing are compiled under the headings of analytical, numerical, and experimental research. In the section presenting the experimental studies, works related to mitigation of sloshing effects are examined as a separate topic. As a result of the review conducted, topics that have received significant attention in the literature and other areas suitable for new research have been discussed. © The Author(s) 2025
PRENATAL PATERNAL EXPECTATIONS SCALE (PPES): VALIDITY AND RELIABILITY STUDY
No full textBu çalışmanın amacı, Doğum Öncesi Annelik Beklentileri Ölçeği’nin (DÖABÖ) baba adayları için geçerlik ve güvenirliğini incelemektir. Bu doğrultuda ilk kez baba olacak ve eşleri gebeliğinin son üç ayında olan 218 baba adayı araştırmanın katılımcılarını oluşturmaktadır. Çalışmada, demografik bilgileri almak için araştırmacılar tarafından hazırlanan Demografik Bilgi Formu; Doğum Öncesi Babalık Beklentileri Ölçeği uyarlama çalışması için DÖABÖ’nün babaların beklentilerine uymayacak maddelerinin çıkarılmasıyla elde edilen 31 maddeli hali; yapı geçerliği kapsamında DÖBBÖ ile arasındaki korelasyonu incelemek için Baba Katılım Ölçeği (BAKÖ) kullanılmıştır. DÖBBÖ’nün psikometrik açıdan yeterli olup olmadığını test etmek için Doğrulayıcı Faktör Analizi, geçerlik kapsamında boyutlar arası ve ölçekler arası korelasyon, güvenirlik kapsamında test-tekrar test korelasyonu ve Cronbach Alfa iç tutarlık analizi gerçekleştirilmiştir. Çalışma kapsamında yapılan analiz sonuçları DÖBBÖ’nün, baba adayları için kullanılabilecek geçerli ve güvenilir bir ölçüm aracı olduğunu göstermektedir.The aim of this study is to examine the validity and reliability of the Prenatal Maternal Expectations Scale (PMES) for expectant fathers. In this context, the participants of the study were 218 expectant fathers who were going to be fathers for the first time and whose wives were in the last three months of their pregnancy. In the study, the Demographic Information Form prepared by the researchers to obtain demographic information was used; the 31-item version of the PMES, obtained by removing the items that would not meet the expectations of fathers, was used for the adaptation study of PPES; and the Father Involvement Scale (FIS) was used to examine the correlation between the PPES within the scope of construct validity. To test whether the PPES was psychometrically adequate, Confirmatory Factor Analysis, inter-dimensional and inter-scale correlations for validity, test-retest correlation and Cronbach's Alpha internal consistency analysis for reliability were performed. The results conducted within the extent of the study show that the PPES is a valid and reliable measurement tool that can be used for expectant fathers
Automatic Meniscus Segmentation Using YOLO-Based Deep Learning Models with Ensemble Methods in Knee MRI Images
Get PDFThe meniscus is a C-shaped connective tissue with a cartilage-like structure in the knee joint. This study proposes an innovative method based on You Only Look Once (YOLO) series models and ensemble methods for meniscus segmentation from knee magnetic resonance imaging (MRI) images to improve segmentation performance and evaluate generalization capability. In this study, five different segmentation models were trained, and masks were created from the YOLO series. These masks are combined with pixel-based voting, weighted multiple voting, and dynamic weighted multiple voting optimized by grid search. Tests were conducted on internal and external sets and various metrics. The dynamic weighted multiple voting method optimized with grid search performed the best on both the test set (DSC: 0.8976 +/- 0.0071, PPV: 0.8561 +/- 0.0121, Sensitivity: 0.9467 +/- 0.0077) and the external set (DSC: 0.9004 +/- 0.0064, PPV: 0.8876 +/- 0.0134, Sensitivity: 0.9200 +/- 0.0119). The proposed ensemble methods offer high accuracy, reliability, and generalization capability for meniscus segmentation
Ekosistem Hizmetlerinin Amasya Üniversitesi Hâkimiyet Yerleşkesi Örneğinde İrdelenmesi
No full textBackground: Population growth, increasing vehicle numbers, unplanned urbanization and rural-urban migration are reducing green spaces and exacerbating environmental problems such as air, water and noise pollution. In this context, university campuses serve as important small-scale urban models that play a crucial role in maintaining environmental and social well-being within urban ecosystems. Objectives: To evaluate the regulating ecosystem services provided by the tree canopy at Amasya University Hâkimiyet Campus (AUHC), such as air quality, energy savings, and carbon storage. Method: In this study, the land cover and ecosystem services of the AUHC were assessed using the i-Tree Canopy model. Six land cover classes defined for the study area (tree/shrub, grass/herbaceous vegetation, soil/bare ground, impervious buildings, impervious roads, other impervious surfaces) were assessed using 4000 random points and ecosystem services such as air quality were calculated. Results: The tree and shrub canopy covering 31.30% of the AUHC removes 261.53 kg of gaseous and particulate pollutants from the air annually, sequesters 36.57 tons of carbon, and stores a total of 918.42 tons of carbon. The economic value of these ecosystem services was calculated as 758 USD for air pollution removal and 44420 USD for carbon storage. The land cover distribution of the campus shows that 57.35% consists of impervious surfaces (buildings, roads) and 42.05% is green space. Conclusion: The tree canopy at the AUHC makes a significant contribution to ecosystem services such as improved air quality, carbon sequestration and storage, and these contributions and economic benefits could be further enhanced by increasing tree cover.Arka Plan: Nüfus artışı, artan araç sayısı, plansız kentleşme ve kırsaldan kente göç, yeşil alanları azaltmakta ve hava, su ve gürültü kirliliği gibi çevresel sorunları artırmaktadır. Bu bağlamda, üniversite kampüsleri, kentsel ekosistemlerin çevresel ve sosyal refahını sürdürmede önemli bir rol oynayan küçük ölçekli kentsel modeller olarak hizmet etmektedir. Amaç: Amasya Üniversitesi Hâkimiyet Kampüsü'ndeki (AÜHK) ağaç örtüsünün sağladığı düzenleyici ekosistem hizmetlerini (hava kalitesi, enerji tasarrufu ve karbon depolama gibi) değerlendirmektir. Yöntem: Bu çalışmada, AÜHK’ndeki arazi örtüsü ve ekosistem hizmetleri, i-Tree Canopy modeli kullanılarak değerlendirildi. Çalışma alanı için tanımlanan altı arazi örtüsü sınıfı (ağaç/çalı, çim/otsu bitki örtüsü, toprak/bitkisiz alan, geçirimsiz yapılar, geçirimsiz yollar, diğer geçirimsiz yüzeyler) 4000 rastgele nokta üzerinden değerlendirildi ve hava kalitesi gibi ekosistem hizmetleri hesaplandı. Bulgular: AÜHK'nün %31,30’unu kaplayan ağaç ve çalı örtüsü, yıllık olarak havadan 261,53 kg gaz ve partikül kirleticiyi temizlemekte, 36,57 ton karbonu tutmakta ve toplamda 918,42 ton karbon depolamaktadır. Bu ekosistem hizmetlerinin ekonomik değeri, hava kirliliğini temizleme için 758 USD ve karbon depolama için 44420 USD olarak hesaplanmıştır. Kampüsün arazi örtüsü dağılımı, %57,35'inin geçirimsiz yüzeyler (binalar, yollar) ve %42,05'inin yeşil alanlar olduğunu göstermektedir. Sonuç: AÜHK’ndeki ağaç örtüsünün hava kalitesini iyileştirme, karbon yakalama ve depolama gibi ekosistem hizmetleri açısından önemli katkılar sağladığını, ancak ağaç örtüsünün artırılmasıyla bu katkıların ve ekonomik faydaların daha da artabileceğini göstermektedir
Topographical features affecting the distribution of wind power plants (WPPs) in Türkiye
No full textSite selection for installing Wind Power Plants (WPPs) is very important for the planning process based on various economic, social and environmental parameters and national legislation. This selection is usually influenced by some criteria that favor or restrict wind speed and WPPs installation potential. Topographical features are a primary criterion affecting wind speed and WPPs installation potential. In this study, it is aimed to address the topographical features affecting the distribution of WPPs in Türkiye. The study is very important in terms of utilizing Türkiye's WPPs potential in the most economical way and identifying potential resource areas more accurately. Within the scope of the study, 3980 WPPs in Türkiye were identified with Google Earth Pro supported Remote Sensing (RS) tools and a WPPs inventory was created. These data were associated with different factor maps used to explain topographical features such as elevation, slope, aspect, topographic relief and landforms. Factor maps were produced using Geographic Information Systems (GIS) techniques using a 30 m resolution digital elevation model (DEM). Various statistical methods quantitatively explained the generated data. The results of the study showed that areas with elevation of 250-500 m, slope of 10-20%, aspect direction of west and southeast, topographic relief of 0-50 m and topographical features dominated by slope landforms are more preferred in WPPs site selection in Türkiye. It was determined that the elevation factor was the most important topographical variable (69.10%) in WPPs site selection. Therefore, it is understood that it is extremely important for decision-makers to take topographical features into consideration in planning studies to identify areas suitable for WPPs located in Türkiye. In addition, this study provides information and recommendations that will help those who will work on the determination of areas suitable for the installation of WPPs
An analysis example of coommitted in Tekirdag province Süleymanpaşa district in the context of the socio demographical characteriztics of children driven to crime in the years 2020-2021-2022
No full textÇocuk, fiziksel ve zihinsel gelişimini tamamlamamış, büyüme ve gelişim sürecinde olan bireydir. Kişisel, sosyal ve duygusal kimliği çevresel ve ailevi etkilerle şekillenir. Birey olma yolunda gelişirken, toplumun desteğine ve rehberliğine ihtiyaç duyar. Biyolojik bir varlık olarak dünyaya gelir ve hangi sebeple olursa olsun sosyalleşme sürecinin kesintiye uğraması toplum içerisinde yanlış ve tehlikeli roller edinmesine yol açar. Her toplumda suç vardır. Suçtan arınmış bir toplumdan söz etmek olası gözükmemektedir. Her ne kadar çocuk ve suç ikileminin uyandırdığı duygu, trajik ve yürek yaralayıcı olsa da çocukların suça sürüklenmesine yol açan faktörlerin tespit edilmesi ve tanımlanması çocuk ve suç gibi bir çelişkinin çözümlenebilmesi için gereklilik arz etmektedir.Tüm dünyada olduğu gibi ülkemiz de de çocukların suça yönelmelerinde yaşanan artış toplumumuzu derinden etkilediği gibi bu sorunun salt ceza adalet sistemi içerisinde değerlendirilmemesi çok boyutlu olarak ele alınması gerekliliğini ortaya koymaktadır. Bu minvalde yapmış olduğumuz bu çalışmada öncelikle ''çocuk'' kavramının ne olduğunu ifade etmek yerinde olacaktır. Sonrasında çocuk kavramının algılanış biçimi, çocuk hukuku ve çocuk hakları kavramları açıklanacak, son olarak suç kavramı, suç davranışı, çocuk suçluluğu ve tüm bu tanımlamalar ışığında suça sürüklenen çocukların sosyo-demografik özellikleri ve bağlamında işlenen suçların analizi yapılacaktır.Children are individuals who have not completed their physical and mental development and are in the process of growth and development. Personal, social and emotional identity is shaped by environmental and familial influences. As children develop towards becoming individuals, they need the support and guidance of society. They are born as a biological being, and any interruption of her socialization process, for whatever reason, causes her to assume wrong and dangerous roles in society.There is crime in every society. It is not possible to talk about a society free from crime. Although the feeling evoked by the dilemma of child and crime is tragic and heartbreaking, identifying and defining the factors that lead children to commit crime is necessary in order to resolve a contradiction such as child and crime.In recent years, the increase in children's tendency towards crime in our country, as well as all over the world, has deeply affected our society, and this problem should not be evaluated solely within the criminal justice system, but should be addressed multidimensionally.In this study, it would be appropriate to first express what the concept of child is. Afterwards, the perception of the concept of child, child law and child rights concepts will be explained, and finally, the concept of crime, criminal behavior, juvenile delinquency and the socio-demographic characteristics of children dragged into crime and the crimes committed in the context will be analyzed in the light of all these definitions
Optimized Biodiesel Production from Pumpkin (Cucurbita pepo L.) Seed Oil: A Response Surface Methodology for Microwave-Assisted Transesterification
Get PDFThe acceptance of biodiesel, specifically fatty acid methyl esters, as an alternative to petroleum diesel has increased significantly. Traditional feedstocks used to produce biodiesel include various seed oils and used frying oils, but there is growing interest in low-cost alternatives like pumpkin seed oil. As a byproduct of cucurbits processing, a significant number of seeds often remains with a high oil content suitable for biodiesel production. In the search for new low-cost alternative feedstocks for biodiesel production, the evaluation of pumpkin seed oil was emphasized. Using a modified microwave oven for transesterification, this study optimized the key parameters of reaction temperature, catalyst concentration (KOH), and reaction time using a Box-Behnken design. The results showed a maximum biodiesel yield of 91.5%. Microwave irradiation significantly accelerated the process, reducing reaction times from an hour to minutes. The biodiesel produced met international physicochemical standards, demonstrating the potential of pumpkin seed oil as a sustainable biodiesel source
Investigating the Connectedness between Oil and Stock Markets in GCC countries: Evidence from Rolling-Window Frequency Domain Causality
Get PDFThis study aims to investigate the causal relationship between oil prices and stock markets in GCC countries. We use weekly stock index and crude oil price data from November 21, 2003, to August 6, 2021, to analyze the spillover effect on the returns and variances of these countries. First, the link between the variables is examined using the frequency domain causality test. Since our sample includes important financial episodes such as the global financial crisis and the global COVID-19 pandemic, we employ rolling-window frequency domain causality test to determine whether such causal relationships exist in these financial crises. To the best of our knowledge, the paper is among the first to employ rolling-window frequency domain causality test to investigate the relationship between the variables. The analysis reveals that the Omani, Kuwaiti, and Bahraini stock markets have limited portfolio diversification benefits due to their high dependence on the price of oil. In addition, Saudi Arabia has the most pronounced divergence in the oil price interaction among GCC stock markets. Investors can benefit from the empirical results practical implications, particularly regarding portfolio diversification. The shifting link between oil and stock markets across different countries and time periods underscores the importance of dynamic diversification strategies that adapt to business cycles.Gaziantep UniversityNone, no fund received