Amasya University Institutional Repository
Not a member yet
2000 research outputs found
Sort by
Shear Performance in Reinforced Concrete Beams with Partial Aggregate Substitution Using Waste Glass: A Comparative Analysis via Digital Imaging Processing and a Theoretical Approach
No full textThe usage of waste glass aggregate (WGA) associated with the replacement of fine aggregate (FA) and coarse aggregate (CA) is observed to reduce the number of raw materials for sustainable concrete. For this aim, a total of 15 beams were produced, and then investigational experiments were implemented to observe the shear performances. The stirrup spacing and WGA proportion were chosen as the main parameters. FA and CA were exchanged with WGA with weight proportions of 0, 10, and 20%. The experimental investigation results showed that changing stirrup spacing and WGA proportion affected the fracture and shear properties of reinforced-concrete-beams (R-C-Bs). Furthermore, the findings of the test results revealed that the proportion of WGA could be efficiently consumed as 20% of the partial replacement of FA. With the addition of FA to the mixture, the load carrying capacity of R-C-Bs increases. On the other hand, increasing the WGA ratio by more than 10% using CA, together with increasing the stirrup spacing, can significantly reduce the capacity of R-C-Bs. It was observed that the calculated shear strengths of R-C-Bs with inadequate stirrup spacing, based on ACI 318 and EC2 design codes, can be up to 52 and 79% higher than the experimental results for R-C-Bs containing coarse glass aggregate and 21 and 56% higher for R-C-Bs containing fine glass aggregate, respectively. Additionally, an image processing method was applied to describe the damages/microdamages in R-C-Bs. At that point, the findings obtained from the experimental part of the study were confirmed by the results of the image processing method. Although the strains obtained with the image processing method are reliable, it has not been determined exactly where the crack will occur due to the very sudden development of the shear crack at the moment of beam failure.Deanship of Scientific Research at King Khalid University, Abha, Saudi Arabia, through Large Groups [RGP2/447/45]The authors are thankful for the financial support provided for this research by the Deanship of Scientific Research at King Khalid University, Abha, Saudi Arabia, through Large Groups RGP2/447/45
Multiplicative hyperbolic split quaternions and generating rotation matrices
No full textWith the help of split quaternions, rotational motion in Lorentz space can be studied. This rotation corresponds to the rotations on the hyperboloids. The aim of this study is to define and examine hyperbolic rotations in the new geometry space. We describe new quaternions that are called multiplicative hyperbolic split quaternions, in this study. We also defined the geometric hyperbolic scalar product and geometric hyperbolic vector product to be able to study hyperbolical rotations. So, we define geometric hyperbolical rotation matrices. Then, it is also shown visually by giving a few examples through the MAPLE program. Finally, we give geometrical inter- presentations of the results in the multiplicative hyperboloidal split quaternion that come up with these results
Three years’ interventional neurology experience in Turkey with the Thrombite thrombectomy device in large vessel occlusion in the anterior circulation: safety, efficacy, and clinical outcome
No full textIntroduction: While the Thrombite device differs from the Solitare stent with its Helical open-side structure feature, it shows great similarity with its other features. We assessed the Thrombite device’s effectiveness and safety in this study. Materials and methods: The study was a retrospective analysis of patients who were included in the Turkish Interventional Neurology database and who had mechanical thrombectomy with the Thrombite device as the first choice between January 2020 and January 2023. The type of study is descriptive research. Result: Using the Thrombite thrombectomy device, 525 patients received treatment. The median baseline National Institutes of Health Stroke Scale (NIHSS) score was 13, the median initial Alberta Stroke Program Early Computed Tomography (ASPECT) score was 8, and the mean patient age was 68.6+11.7 years. Between the groin puncture and the successful recanalization, the median time was 34 minutes (interquartile range [IQR]: 15–45). 48.2% (modified treatment in cerebral infarction; mTICI) 2b/3% and 33.9% (mTICI 2c/3) were the first-pass recanalization rates. In the end, 87.7% of patients had effective recanalization (thrombolysis in cerebral infarction 2b/3). In the “first-pass” subgroup, the favorable functional result (modified Rankin Scale 0–2) was 51.8%, while it was 41.6% for the entire patient population. The rate of embolization into new territory/different territory were 2.1/0.1%. 23 patients (4.5%) had symptomatic hemorrhage. Conclusion: The Thrombite device showed a good safety profile and high overall successful recanalization rates in our experience. Copyright © 2024 Akpınar, Gurkas, Ozdemir, Doğan, Önalan, Yıldırım, Memiş, Aytaç, Acar, Öğün, Aykaç, Uysal Kocabaş, Acar, Eryılmaz and Topaktaş
Spanish Journal of Human Nutrition and Dietetics
No full text:Introduction: The prevalence of iodine deficiency in Turkey significantly decreased after iodine fortification of table salt, but regional differences may still exist. The objective of this cross-sectional study was to assess the iodine levels among adults residing in Amasya. Methodology: This study, which included 232 adults aged 18-64 years, was conducted in a public hospital in Amasya. The study data were obtained through a questionnaire form applied to individuals through faceto-face interviews. After taking general information and anthropometric measurements of the individuals participating in the study, urinary iodine levels were analyzed. Results: The mean urinary iodine level was 13.7 (1.5) mu g/dL. Iodine status of 99.6% of the participants is normal and 64.9% of them use iodized salt. Alcohol consumption and body mass index showed a statistically significant difference according to urinary iodine level classification (median value). In individuals who consume iodized salt, the frequency of those with urinary iodine levels above the median value is higher compared to those who do not consume iodized salt. Conclusions: This study shows the iodine status of adult individuals living in Amasya. In future studies, dietary iodine intake of individuals should also be evaluated, and iodine status should be examined in vulnerable groups such as pregnant, lactating and elderly
Fixed-Dose Antiplatelet Dual Combination in Patients with Coronary Artery Disease in Turkish Population: DAPT-TR
No full textBackground: Dual antiplatelet therapy (DAPT) is the treatment of choice for patients with acute and chronic coronary syndromes as it reduces mortality and prevents recurrent thrombotic complications. The assessment of both ischaemic burden and bleeding risk is crucial in deciding which DAPT to choose and how long it should be continued. Objectives: The aim of our study was to perform prospective clinical follow-up of patients receiving fixed-dose combination therapy (ASA 75 mg + clopidogrel 75 mg). Our study is a multicentric, cross-sectional, observational, cohort study. Methods: A total of 1500 patients who were started on fixed-dose combination DAPT for acute or chronic coronary syndrome were included in the study. Primary endpoints were hospitalization for any reason, hospitalization for cardiovascular cause, acute myocardial infarction, stent thrombosis, target vessel revascularization and bleeding; the secondary endpoints were death for any reason or cardiovascular cause and stroke. The significance level adopted in the statistical analysis was 5%. Results: Median age was 63 years; 78.5% of the patients were receiving DAPT treatment for acute coronary syndrome. The rates of hospitalization for cardiovascular reasons, acute myocardial infartion, stent thrombosis and target-vessel revascularization were 7.9%, 2.3%, 1.3% and 4.2%, respectively. While the rate of BARC type 1 bleeding was 3.3%, the rate of BARC type 5, 3, or 2 bleeding was 0.6%. The secondary endpoints which were death from any cause, cardiovascular death and stroke were 0.5%, 0.3% and 0.3%, respectively. Conclusion: Our study shows that fixed-dose combination therapy is effective and safe in appropriately selected patients with acute or chronic coronary syndromes
Analysis of sphenoid sinus and ethmoid sinus volume and asymmetry by sex: A 3D-CT study
No full textPurpose To measure the volume of the sphenoid and ethmoid sinuses and to analyse the asymmetry index values by age/gender. Methods Three-dimensional (3D) Computed Tomography (CT) images of 150 individuals (75 females, 75 males) of both sexes between the ages of 18-75 were included in our study. Sphenoid and ethmoid sinus volumes were measured using the 3D Slicer software package on these images, and the asymmetry index was calculated. Results In our study, mean sphenoid sinus volume (female right: 4264.4 mm(3), left: 3787.1 mm(3); male right: 5201.1 mm(3), left: 4818.2 mm(3)) and ethmoid sinus volume (female right: 3365.1 mm(3), left: 3321.2 mm(3); male right: 3440.9 mm(3), left: 3459.5 mm(3)) were measured in males and females. Left sphenoid sinus values of males were statistically higher than females (p = 0.036). No statistically significant relationship existed between age, sinus volumes, and asymmetry index (p > 0.05). A statistically weak positive correlation existed between males' left sphenoid and ethmoid sinus volume (rho = 0.288; p = 0.012). There was no statistical relationship between asymmetry index in the whole group (p > 0.05). A statistically weak negative correlation was found between sphenoid and ethmoid sinus asymmetry index in males (rho=-0.352; p = 0.002). There was no statistical relationship between asymmetry index in females (p > 0.05). Conclusion Knowing paranasal sinus morphology, morphometry, and asymmetry index value will be significant for preoperative and postoperative periods
Examination of multifaceted leadership orientations and levels of coping with sports-related problems among students studying at the faculty of sports sciences
No full textBu çalışmada spor bilimleri fakültesinde öğrenim gören öğrencilerin çok yönlü liderlik yönelimleri ile sportif sorunlarla başa çıkma düzeylerinin incelenmesi amaçlanmıştır. Bu amaç doğrultusunda çalışmada nicel araştırma yöntemlerinden tarama modellerinden ilişkisel tarama modeli kullanılmıştır. Araştırmanın evrenini Türkiye'de spor bilimleri fakültesinde öğrenim gören öğrenciler oluşturmakta olup, örneklem grubu 406 öğrenci kapsamındadır. Araştırmada veri toplama aracı olarak "Çok Yönlü Liderlik Yönelimleri Ölçeği" ve "Sportif Sorunlarla Başa Çıkma Becerileri Envanteri" kullanılmıştır. Tüm istatistiksel hesaplamalar SPSS 26.0 V istatistik paket programda yapılmıştır. Araştırmada, cinsiyet durumuna göre bireylerin çok yönlü liderlik yönelimleri ölçek ve sportif sorunlarla başa çıkma ve toplam puan ve alt boyut (baskı altında yüksek performans) toplam puanları arasında istatistiki olarak anlamlı farklılık tespit edilmemiştir. Bölüm durumuna göre bireylerin sportif sorunlarla başa çıkma ölçek toplam puan ve alt boyut toplam puanları arasında istatistiksel olarak anlamlı bir farklılık tespit edilmezken ve çok yönlü liderlik yönelimleri ölçek toplam puan ve yapısal liderlik, politik liderlik ve karizmatik liderlik alt boyut toplam puanları arasında istatistiki olarak anlamlı farklılık tespit edilmiştir. Sınıf değişkenine göre bireylerin çok yönlü liderlik yönelimleri ölçek toplam puan ve alt boyut toplam puanları arasında istatistiksel olarak anlamlı bir farklılık tespit edilmezken ve Sportif Sorunlarla Başa Çıkma Becerileri Envanteri alt boyut kapsamında yer alan kaygıdan uzak olma boyutunda istatistiksel olarak anlamlı bir farklılık olduğu belirlenmiştir. Spor branşına göre bireylerin çok yönlü liderlik yönelimleri ölçek toplam puan ve alt boyut toplam puanları arasında istatistiksel olarak anlamlı bir farklılık tespit edilmezken ve sportif sorunlarla başa çıkma becerileri envanteri alt boyut kapsamında yer alan antrenörlük durumu boyutunda istatistiksel olarak anlamlı bir farklılık olduğu sonucuna ulaşılmıştır. Spor yapma durumuna göre bireylerin çok yönlü liderlik yönelimleri ölçek toplam puan ve alt boyut toplam puanlar arasında istatistiksek olarak anlamlı bir farklılık olduğu belirlenmiştir. Son olarak araştırmada, yaş durumuna göre bireylerin sportif sorunlarla başa çıkma ve çok yönlü liderlik yönelimleri ölçek toplam puan ve alt boyut toplam puanları arasında istatistiki olarak anlamlı farklılık tespit edilmemiştir.This study aims to examine the multidimensional leadership orientations and coping with sports problems levels of students studying at the faculty of sports sciences. For this purpose, the relational screening model, one of the quantitative research methods, was used in the study. The universe of the study consists of students studying at the faculty of sports sciences in Turkey, and the sample group consists of 406 students. The "Multidimensional Leadership Orientation Scale" and the "Sports Problem Coping Skills Inventory" were used as data collection tools in the study. All statistical calculations were made in the SPSS 26.0 V statistical package program. In the study, no statistically significant difference was found between the multidimensional leadership orientation scale and coping with sports problems and total score and sub-dimension (high performance under pressure) total scores of individuals according to gender status. While no statistically significant difference was found between the total score and sub-dimension total scores of individuals coping with sports problems according to department status, a statistically significant difference was found between the multidimensional leadership orientation scale total score and structural leadership, political leadership and charismatic leadership sub-dimension total scores. According to the class variable, no statistically significant difference was found between the multidimensional leadership orientation scale total score and sub-dimension total scores of individuals, and it was determined that there was a statistically significant difference in the anxiety-free dimension within the scope of the Sport Problem Coping Skills Inventory sub-dimension. According to the sports branch, no statistically significant difference was found between the multidimensional leadership orientation scale total score and sub-dimension total scores of individuals, and it was concluded that there was a statistically significant difference in the coaching status dimension within the scope of the sport problem coping skills inventory sub-dimension. It was determined that there was a statistically significant difference between the multidimensional leadership orientation scale total score and sub-dimension total scores of individuals according to their sports activities. Finally, in the study, no statistically significant difference was found between the multidimensional leadership orientation scale total score and sub-dimension total scores of individuals according to their age
Bibliometric Analysis of Studies On “Green Finance” Based On Web of Science Database
No full textThis research aims to examine articles that reconcile climate change and green finance studies, which are frequently prominent in recent studies. The scope of the study is to conduct a bibliometric analysis of international articles written in the mentioned field. Articles written in the mentioned field and scanned in the Web of Science (WoS) database constitute the study database. Articles published in journals and scanned in the WoS database from the beginning of the study scope until 27/06/2023 were included. Articles published after the given date and scanned in the database were not included in the scope of the study. In this context, it was seen that there were 1060 studies identified in the database in question. When the studies were scanned with \"economy\" and \"business finance\" data as restrictive data, it was determined that 294 studies were conducted. As a result of the examination made by entering the relevant restrictive keys, it was seen that the first study in this field was published in 2010 and entered into the database. It has been observed that the country with the most publications on the subject included in the research area is the People's Republic of China. It has been determined that the author/s who published the most in this field is Taghizadeh-Hesary Farhad. It was noticed that the year with the most publications on the subject was 2022. It has been noticed that the most common publication type published in the field of research and included in the search is articles. It was determined that the journal that published the most articles and studies on the subject included in the research was the \"Energy Economics\" journal. In order to see the subject more clearly within the scope of the study, a network analysis was prepared using the VOSviewer mapping method, showing co-authorship relationships, showing the most refer-to-writer connections, and examining keyword correlations
Gebeliğin İstenme Durumu ile Aile planlaması Tutumu Arasındaki İlişkinin Belirlenmes
No full textAmaç: Araştırmanın amacı gebeliğin istenme durumu ile aile planlaması tutumu arasındaki ilişkiyi belirlemektir. Yöntem: Tanımlayıcı türde olan çalışma, Şubat-Mayıs 2022 tarihleri arasında seçkisiz örneklem yöntemiyle 313 gebe kadın ile yürütüldü. Veriler gebe kadınları tanıtıcı bilgi formu ve “Aile Planlaması Tutum Ölçeği” kullanılarak toplanmıştır. Veriler, tanımlayıcı istatistikler ve Mann Whitney U testi ile değerlendirilmiştir Bulgular: Gebe kadınların Aile planlaması tutum ölçeği toplam puanı 126.4 ±18.3 olarak bulunmuştur. Topluma ilişkin alt boyut puan ortalaması 57.6±10.3, Doğuma ilişkin alt boyut puan ortalaması 28.8±5.2 ve Aile Planlaması tutumu alt boyut puan ortalaması 39.9±6.8 olarak bulunmuştur. Katılımcıların %74,8’inin gebeliği isteyerek gerçekleştirdiği, %57,2’sinin aile planlaması hakkında bilgisi olduğu, %31,9’unun gebelik öncesi dönemde aile planlaması yöntemi kullandığı ancak doğumdan sonra kullanacak katılımcı oranının %66,5 olduğu saptanmıştır. Sonuç: Çalışma sonucunda, isteyerek gebe kalan kadınlarla, istemeyerek gebe kalan kadınların aile planlaması tutumları arasında farklılık olmadığı belirlendi. İstenmeyen gebeliklerin önüne geçmek için kadınların doğum yaptıktan sonra hastaneden taburcu olmadan önce aile planlaması yöntemleri konusunda bilgilendirilmeleri ve doğum sonu dönemde ebe/hemşireler tarafından sık takip edilmeleri, eğitim ve danışmanlık verilmesi, izlem yapılması önerilmektedir
Green Synthesis of Spiroindole Derivatives: Biological Evaluation and in Silico Studies
No full textThis work describes the synthesis of spiro derivative compounds in the presence of nonmetallic catalysts and ultrasonic irradiation. These synthesized derivatives constitute an important class of organic compounds and display promising variety of bioactive properties. The synthesis of spirooxindole, spiro[pyrazolo-4,3'-indoline]-2',5,10(1H,11H)-trione, and spiro[acridine-7,3'-indoline]-2',8,13(14H)-trione derivatives were performed by the reaction of isatin with aromatic amines, and 1,3-dicarbonyl compounds under ultrasonic irradiation conditions in the presence of organocatalysts (Thiamin hydrochloride (Vit B1) or (+/-)-Camphor-10-sulfonic acid ((+/-)CSA)) or phase transfer catalysts. This procedure provided short reaction times, high yields, green reaction media and a simple working process. Then the DNA cleavage and antioxidant activities of the synthesized compounds were studied. Synthesized compounds were also scrutinized using DFT-B3LYP basis set. Additionally, a comprehensive investigation into the ADME (Absorption, Distribution, Metabolism, and Excretion) properties of these compounds was conducted.Kirklareli University Scientific Research Projects Coordination Unit [KLUBAP 122, KLUBAP168]This study was financially supported by Kirklareli University Scientific Research Projects Coordination Unit with the grand numbers KLUBAP 122 and KLUBAP16