Sivas Cumhuriyet Üniversitesi Kurumsal Akademik Arşivi - Sivas Cumhuriyet University Open Access System
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Developing a new ensemble method for sentiment analysis in mobile assisted language learning: a case study for Duolingo
No full textIn today's world, mobile devices and mobile technologies have become one of the indispensable elements, especially for young people. Learning activities using these technologies have also become widespread, and mobile assisted language learning (MALL) has become even more important. This study was conducted to evaluate users' opinions about MALL methods. For this purpose, Duolingo user comments, which is currently the most known and used mobile application in foreign language education, were used. One million comments to the app are classified in terms of sentiment analysis. In the study, a new model was proposed by combining different feature extraction and classification methods and the results were compared. It has been determined that the proposed model has high classification success. With the proposed model, it is thought that user opinions can be analysed and software and applications can be developed according to user needs, especially for foreign language learning
The concept of ibnul-waqt in light of Quranic verses
No full textZaman, İslam düşüncesinde önemli bir yere sahiptir. İslam, zamanın kıymetini bilerek, onu en iyi şekilde değerlendirmeyi emreder. İslam'da zaman, geçmiş, gelecek ve şimdiki zaman olmak üzere üç ana bölüme ayrılır. Geçmiş zaman, kişinin ibret alması ve ders çıkarması içindir. Gelecek zaman, kişinin hazırlık yapması ve hedeflerine doğru ilerlemesi içindir. Şimdiki zaman ise kişinin yaşamını anlamlı kılması içindir. İslam, zamanın en küçük birimi olan anı en iyi şekilde değerlendirmeyi, yani ibnu'l vakt olmayı öğütler. İbnü'l vakt, zamanın farkında olan, onu boşa harcamayan ve her anını verimli kılan kimsedir. İslam'da zamanın önemi, ibadetlerin zamana göre düzenlenmesinden de anlaşılmaktadır. Namaz, oruç, zekât ve hac gibi ibadetler belli vakitlerde yerine getirilir. Bu, zamanın kıymetini bilmenin ve onu en iyi şekilde değerlendirmenin bir gereğidir. İbnü'l vakt olmak için geçmiş için hayıflanmaktan ve gelecek için endişeye düşmekten uzak durmak gerekir. Tevekkül ederek, içinde bulunduğumuz anı değerlendirmek gerekir. Tevekkül eden insan, zamanın getirdiği her şeye sabır, şükür ve rıza gösterir. İbnü'l vakt olmak, kişinin hem dünyevi hem de uhrevi hayatında mutlu ve huzurlu olmasını sağlar. Bu çalışmada, zamanın değerlendirilmesi ve anlamlandırılması ile ilgili olan ibnu'l-vakt kavramı, Kur'an ayetlerindeki yansımaları, ibadet ve tevekkül kavramlarıyla olan bağlantıları ve geleceğe yönelik kaygı durumları açısından ele alınmış ve analiz edilmiştir.Time has an important place in Islamic thought. Islam commands to appreciate the value of time and to use it in the best way possible. In Islam, time is divided into three main sections: past, future, and present. The past is for the person to take lessons and learn from. The future is for the person to prepare and progress towards their goals. The present is for the person to make their life meaningful. "Islam advises to make the best use of the moment, which is the smallest unit of time, that is, to be ibnu'l vakt. İbnu'l vakt is someone who is aware of time, does not waste it, and makes every moment productive. The importance of time in Islam is also understood from the arrangement of the worship according to time. Worship such as prayer, fasting, zakat, and hajj are performed at certain times. This is a requirement of knowing the value of time and using it in the best way possible. To be ibnu'l vakt, one should avoid regretting the past and worrying about the future. One should make use of the present moment by trusting in God. The person who trusts in God shows patience, gratitude, and consent to whatever time brings. Being ibnu'l vakt enables the person to be happy and peaceful in both worldly and spiritual life." In this study, the concept of ibnu'l-vakt, which is related to the evaluation and meaning-making of time, is examined and analyzed in terms of its reflections in the Quranic verses, its connections with the concepts of worship and trust in God, and its anxiety states for the future
An Investigation of the Discrete-Time Model Subject to Immigration, Harvesting, and Allee Effect
No full textThis paper deals with the dynamic behaviors of a discrete-time fractional-order predator-prey model in the presence of both the Allee effect and immigration on the prey population and in the presence of harvesting on the predator population. The existence and uniqueness and parametric conditions for local asymptotic stability of fixed points of the discrete-time fractional-order model are studied. Moreover, using the center manifold theorem and bifurcation theory, it is shown that the considered model undergoes flip and Neimark-Sacker bifurcations in a small neighborhood of the interior fixed point. Then, the direction of bifurcation is calculated. A feedback controller is implemented in the proposed model to control chaos thanks to the emergence of the Neimark-Sacker bifurcation. Furthermore, numerical analysis confirms the theoretical analysis with the help of Matlab software
Natural Diversity of Crataegus monogyna Jacq. in Northeastern Türkiye Encompassing Morphological, Biochemical, and Molecular Features
No full textHawthorn (Cratageus monogyna Jacq.), one of the important wild fruit species in Turkey, is an important fruit species in many countries due to its use in traditional medicine, landscaping studies, and the food and beverage industry. In this study, morphological characterization revealed significant variation among genotypes, with fruit weight ranging from 0.55 g to 2.87 g, fruit width from 9.74 mm to 18.39 mm, and leaf width from 19.53 mm to 41.19 mm. Genotype-dependent variations were observed in the total phenolic content (151.34 mg-491.88 mg GAE 100 g-1 flesh), the total flavonoid content (16.74-48.13 mg CAE 100 g-1 flesh), the total anthocyanin content (26.34-79.79 mg cyn-3 gluc 100 g-1 flesh), and the antioxidant activity (29.20% to 56.70%). HPLC-based phenolic profiling identified substantial variations in key bioactive compounds, with the highest levels of chlorogenic acid (16.16 mg 100 g-1 fw), caffeic acid (10.21 mg 100 g-1 fw), epicatechin (13.83 mg 100 g-1 fw), rutin (74.05 mg 100 g-1 fw), and protocatechuic acid (2.00 mg 100 g-1 fw). ISSR marker-based molecular analysis revealed a high degree of genetic polymorphism (89.12%), with 55 out of 62 bands classified as polymorphic. The polymorphic information content values ranged from 0.34 to 0.44. The Jaccard similarity coefficient ranged from 0.04 (M9 and M16) to 0.63 (M17 and M3), indicating substantial genetic variability. The tanglegram analysis comparing genetic and morphological-biochemical dendrograms yielded an entanglement score of 0.714, indicating an alignment between molecular and phenotypic data. These findings show that hawthorn genotypes from the Kelkit Valley exhibit extensive genetic and biochemical diversity, which is critical for conservation efforts, breeding programs, and the development of high-value medicinal and functional food products
Examination of Medical Students' Knowledge, Attitudes, and Behaviours Regarding Rational Drug Use
No full textObjectiveTo evaluate the knowledge and attitudes of medical students towards rational drug use (RDU) MethodsThe cross-sectional study was conducted with 993 medical students between March and June 2023. Sociodemographic data form and rational drug use scale (RDUS) were used to obtain research data. ResultsThe students' average RDU knowledge level score was 37.7 +/- 5.7, and the rate of those with a high knowledge level was 85.5%. The knowledge level of RDU was higher in female (p<0.001), in non-smokers (p=0.027), and in those whose family's monthly income was medium and high (p=0.015). Of the students, 36.6% had heard of the concept of RDU, and 69.7% had received training on this subject at the faculty of medicine. As an unexpected finding, the RDUS score was found to be higher in those who had never heard of the concept of RDU before (p<0.001), in those who did not receive RDU training in medical school (p=0.008), and in those who evaluated their RDU knowledge level as moderate or poor (p<0.001). ConclusionsIt is obvious that the concept of RDU is one of the topics that medical students should know. Therefore, it is very important to provide adequate and effective education regarding this concept in medical faculties
Ultrasound Doppler renal pulsatility index is a predictive marker of arterial stiffness in children with solitary functioning kidney
No full textIntroduction: Patients with solitary functioning kidney (SFK) have glomerular hyperfiltration, hypertension, proteinuria and impaired renal function resulting in microvascular atherosclerotic abnormalities. This condition leads to an increase in arterial stiffness. In this study, we aimed to investigate the usefulness of noninvasive renal Doppler ultrasonography hemodynamic parameters in demonstrating arterial stiffness in pediatric patients with SFK. Methods: The study included 59 children aged 6-18 years who were diagnosed with SFK. Demographic, biochemical, anthropometric, and blood pressure data were recorded. The renal Doppler ultrasound hemodynamic parameters renal resistive index (RRI), renal pulsatility index (RPI), carotid femoral pulse wave velocity (cfPWV), central augmentation index (cAIx) and carotid intima media thickness (cIMT) were evaluated. Results: Eighteen (30.5%) cases with acquired SFK and 41 (64.5%) cases with congenital SFK were detected. Central augmentation indices were higher in children with congenital SFK than in children with acquired SFK (p = 0.038). CkiDeGFRSCrCysC was lower in patients with acquired SFK (p = 0.011). LDL cholesterol levels were higher in children with acquired SFK (p = 0.018). We found a significant correlation between RPI and cfPWV with a correlation coefficient (r) of 0.321 and a statistically significant p value of 0.013. Conclusion: Congenital SFK is associated with increased microvascular atherosclerotic burden. RPI assessment with renal Doppler ultrasound may be a noninvasive method to identify arterial stiffness
Hybrid working system in organizations
No full textGünümüzde değişim faktörü ekonomik, teknolojik, sosyal, ekolojik vb. toplumsal alanlarda hızla dönüşümlere neden olmaktadır. Bireylerin istek ve ihtiyaçları doğrultusunda gelişen bu değişimler örgütlerde çeşitli etkilere neden olmaktadır. İstek ve ihtiyaçların doğrultusunda zaman, hız ve kolay erişim odaklı değişimlerin yaşandığı görülmektedir. Örgütler kârlılık, maliyet, çalışan memnuniyeti ve esneklik avantajlarını elde etmek amacıyla değişime uyum sağlayacak stratejiler geliştirmektedirler. Değişim hızını artıran en önemli etken olan teknolojik gelişmeler, bilgi akışını hızlandırmakta ve örgütlerin çalışma sistemlerinde değişimlere olanak sağlamaktadır. Uzaktan çalışma sistemi olan hibrit çalışma sistemi, haftanın belirli günlerinde ev ortamında belirli günlerinde ise iş yerinde çalışma imkânı sunan bir çalışma sistemidir. Sorunların daha çok anakent şehirlerde yaşandığı tam zamanlı çalışma sisteminde, çalışanlar ulaşım zorluğu, yemek masrafı, sosyal hayata zaman ayıramama, motivasyon kaybı, gelişimde durağanlık gibi olumsuzluklar yaşamaktadır. Hibrit çalışma sisteminin hem ev hem iş ortamını bir arada harmanlaması ile işgören iş hayatı ve sosyal yaşam dengesini kurabilmekte, ulaşım için harcanan zamanda kişisel zaman yaratabilmektedir. Bu faydalar işgörenin örgüte bağlılığını etkilemekle birlikte performans çıktısına da yansımaktadır. İşgörenin yaptığı işe olan memnuniyeti iş çıktısı ve performansını olumlu yönde etkilerken işveren doğrudan fayda sağlamaktadır. İşveren, çalışan bağlılığı, aidiyet, esneklik ve performans artışının yanı sıra hibrit çalışma sistemi ile kârlılığını arttırmaktadır. Bu çalışma, çalışanların hibrit çalışma sistemine ilişkin algılarını ölçmeyi amaçlamaktadır. Araştırma kapsamında hibrit çalışma sistemini tecrübe edinmiş çalışanların yanıtladığı gönüllülük esasına dayalı samimi ve şeffaf yanıtlar alınarak çevrimiçi (online) anket uygulaması yapılmıştır. Çalışma kapsamında yer alan ölçek açımlayıcı faktör analizi, doğrulayıcı faktör analizi, ANOVA, T testi ile analiz yapılarak, ölçekleri oluşturan ifadelere ilişkin tanımlayıcı istatistikler ortalama, standart sapma, skewness ve kurtosis değerleri kapsamında incelenmiştir. Analizlerin sonucunda hibrit çalışma sisteminde işgören algıları kapsamında yapılan çalışmalara uygun güvenilirlik ve geçerlilik verilerine sahip olduğu görülmüştür.Today, the change factor causes rapid transformations in economic, technological, social, ecological, etc. social areas. These changes, which develop in line with the desires and needs of individuals, cause various effects in organizations. It is seen that changes focused on time, speed and easy access are experienced in line with the desires and needs. Organizations develop strategies to adapt to change in order to obtain the advantages of profitability, cost, employee satisfaction and flexibility. Technological developments, which are the most important factors that increase the speed of change, accelerate the flow of information and enable changes in the working systems of organizations. The hybrid working system, which is a remote working system, is a working system that offers the opportunity to work at home on certain days of the week and at work on certain days. In the full-time working system, where problems are experienced more in metropolitan cities, employees experience negativities such as transportation difficulties, food expenses, not being able to spare time for social life, loss of motivation, and stagnation in development. With the hybrid working system blending both home and work environments together, employees can establish a balance between work life and social life, and can create personal time in the time spent on transportation. These benefits affect the employee's commitment to the organization and are also reflected in the performance output. While the employee's satisfaction with the job positively affects the job output and performance, the employer directly benefits. The employer increases its profitability with the hybrid working system, as well as employee commitment, belonging, flexibility and performance increase. This study aims to measure the perceptions of employees regarding the hybrid working system. Within the scope of the research, an online survey was conducted by obtaining sincere and transparent responses based on volunteering from employees who have experienced the hybrid working system. The scale included in the study was analyzed with exploratory factor analysis, confirmatory factor analysis, ANOVA, T test, and the descriptive statistics related to the expressions forming the scales were examined within the scope of mean, standard deviation, skewness and kurtosis values. As a result of the analyzes, it was seen that the hybrid working system has reliability and validity data suitable for the studies conducted within the scope of employee perceptions
Synthesis and use of new magnetic adsorbent for sensitive, practical and simultaneous analysis Ibuprofen and Ketoprofen molecules in urine samples
No full textA new sample preparation and determination method, including HPLC-DAD analysis after Magnetic Solid Phase Extraction (MSPE), was developed to monitor the trace amounts of two types of nonsteroidal anti-inflammatory drugs (NSAIDs), Ibuprofen (IBP) and Ketoprofen (KP). In the proposed method, IBP and KP analytes were extracted from newly synthesized magnetic-based sorbent in a pH 4.0 buffer medium and enriched by desorbing again with ethanol to a smaller volume before chromatographic determinations. The samples were filtered and transferred to HPLC vials before analysis. The experimental variables were optimized step by step such as adsorption time, desorption solvent, pH, etc. After preconcentration of IBP and KP molecules by MSPE, determination of target molecules was carried out by isocratic elution of 30 % Methyl alcohol, 40 % Trifluoro Acetic Acid (TFA) (0.1 %, v:v), 30 % Acetonitrile. By using optimized conditions, the detection limits of target molecules were calculated as 3.43 ng mL- 1 and 3.48 ng mL- 1 for IBP and KP, respectively. The triplicate measurements made with model solutions containing 100 ng mL- 1 of target molecules, RSD %values were found below 3.50 %. The developed method was successfully applied to synthetic urine and pooling urine samples. Finally, the practicality and suitability for green analytical chemistry of the proposed method was evaluated by using Blue Applicability Grade Index (BAGI) and Green Analytical Procedure Index (GAPI).TUBITAK 2209-A University Student Research Project [1919B012000900, TBI bull; TAK 2209-A]This study was partly supported by the project numbered 1919B012000900 within the scope of TUBI center dot TAK 2209-A University Student Research Project. Moreover, this study was produced from experimental data obtained from Sule Temiz's thesis
Prayers of the prophet in the Qur'an background and analysis
No full textDua, ademoğlunun yaratılışından itibaren, Allah'a karşı zaman, mekân, medeniyet ayırt etmeksizin ihtiyaç hissettiği ve vazgeçemediği ilahî bir iletişim şeklidir. Bütün dinlerin ortak ibadet şekli olarak duanın insan ile tanrı arasında bir iletişim aracı olduğu görülmektedir. İnsan, Allah'a (cc) kulluk ve ibadet etmek için yaratılmıştır. O bu sorumluluğunu yerine getirebilme bilincinde olsa da olmasa da yüce bir varlığa sığınmaya her zaman ihtiyaç duymuştur. Bu sığınmayla insan ihtiyaçlarının ve sıkıntılarının giderilmesini isteyeceği bir varlığı hissetmenin güven ve huzurunu yaşamaktadır. Allah'ın (cc) rahmet, merhamet ve yol gösterici oluşu peygamberleri vasıtasıyla insanlara aktarılmaktadır. Peygamberler tebliğ görevini yerine getirirken yardım talebinde bulunmanın yanında kavminin günahlarının affı ve diğer konularda da dua etmişlerdir. Bu duaların ortaya koymuş olduğu mesajlar günümüz insanı için yaşayacakları benzer olayların çözümünde rehberlik edecektir. Bu sebeple Kur'ân-ı Kerim'de geçen peygamber dualarının sebepleri, sonuçları ve mesajlarının anlaşılması önem ihtiva etmektedir. Çalışmamız giriş ve üç bölümden oluşmaktadır. Giriş bölümün de tezin konusu, amacı ve metodu hakkında bilgi verilmiştir. Birinci bölüm de "dua" kavramının kavramsal çerçevesine yer verilmiştir. İkinci bölüm de Kur'ân'da ismi ve duaları geçen peygamberlerin dualarının oluşumu, sonuçları ve verilen mesajları üzerinde durulmuştur. Peygamberlerin hayatları ve mücadeleleri Kur'ân-ı Kerim'deki ilgili ayetlerin tefsirleri bağlamında ve peygamberler tarihi olarak yazılan eserlerin anlatımıyla kısa bilgiler verilmeye gayret edilmiştir. Üçüncü bölüm ise peygamber dualarının günümüze olan yansıması. Kur'ân'a göre dua olgusunun olumlu ve olumsuz insan tipleri üzerine etkisi ve onların yapmış oldukları duaların tahlili üzerinde durulmuştur.Prayer is a formation that mankind felt the need for and cannot give up since its creation, regardless of time, geography or civilization. It has also taken its place as a common form of worship in all known religions. Man was created to serve and worship Allah (swt). Whether he is in an effort to fulfill this responsibility or not, he perpetuated to be in a feeling to need of refuge in a supreme being. With this refuge, he experienced the security and peace to demand his needs and troubles to be met. Prophets, who are the symbols of Allah's (swt) mercy, compassion and guidance, not only asked for help while fulfilling their prophetic duty, but also prayed for themselves and their people on other matters such as forgiveness of their mistakes etc. It is very important for a person to understand the reasons for the formation of these prayers, as well as those prayers' implications and messages. Prophets set an example not only in teaching religion but also in their representative duties. For this reason, it is aimed also for Muslim servants to form their prayers by taking the messages given by these prayers as examples. For this purpose, efforts have been made to search and understand the reasons for the formation, implications and messages of the prophetic prayers take place in the Holy Quran. Our study consists of three parts: The first part gives place to the conceptual framework for the word "prayer". While the second part dwells on the formation of the prayers of the prophets whose names and prayers are mentioned in the Quran, as well as their implications and the messages the give on the one hand, it gives a brief information about the prophets is tried to be given in the light of Quranic verses and commentaries on the other. In the third part, an attempt was made to focus on the positive and negative human examples of the phenomenon of prayer according to the Qur'an
Microstructural behavior and explainable machine learning aided mechanical strength prediction and optimization of recycled glass-based solid waste concrete
No full textOne effective way to accomplish sustainability goals is to use solid waste as sustainable building materials to help reduce environmental footprint and enhance cementitious compounds. Compressive strength (CS), one of the most crucial characteristics of concrete, must be measured through expensive and time-consuming studies. Furthermore, numerous research has shown the effect of using solid waste (waste glass) as both cement and aggregate replacement on the mechanical properties of concrete. Therefore, this study determines the CS for solid waste concrete (SWC) using an extensive database of 451 data points gathered from experimental and earlier research using waste glass (used as solid waste) as aggregate and cement replacement. For experimental evaluation, SWC was prepared by replacing cement with 10% SF and 5%, 10%, 15%, and 25% solid waste (SW). A compressive strength test was conducted to assess the mechanical strength, and microstructural analysis was performed to highlight the interplay between SW and the concrete matrix. The CS was predicted using Random Forest (RF), XGBoost (XGB), Gradient Boosting (GB), and AdaBoost (ADB) models. The ML model's performance was validated using a variety of performance metrics, including R2, RMSE, MAE, and MAPE. To further illustrate how each feature affected the CS, SHAP plots and partial dependence plots were created. According to the results, the XGB model outperformed the others, with R2 values between 0.948 and 0.994. SHAP analysis revealed that curing age, SCM, cement, and SW were the most impactful features for predicting strength. Microstructure analysis revealed that the incorporation of SW showed denser microstructure and greater C-S-H bonds, which enhanced strength. These results are useful for the sustainable manufacturing of waste-based concrete and help designers comprehend the importance of every element in SW