Browsing by Author "Doğan, E."

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Advances in Artificial Intelligence in Education: Leading Contributors, Current Hot Topics, and Emerging Trends
(Ozgen Korkmaz, 2024) Doğan, E.; Şahin, F.
Artificial Intelligence (AI) has emerged as a burgeoning field in education, characterized by rapid growth and diverse research interests. This study employs bibliometric analysis to explore the landscape of AI research in education, focusing on studies indexed in the Web of Science (WOS) database. A comprehensive search identified 1383 articles published between 1981 and 2024, which were analysed using the Bibliometrix R package. The analysis encompassed performance analysis, science mapping, and network analysis, yielding visualizations such as annual scientific production trends, most cited documents, and thematic maps. Key findings reveal a substantial increase in AI research from 2022 onwards, underscoring a shift towards longitudinal studies to track AI's evolution and impacts in educational contexts. Ethical considerations, data privacy, and societal implications emerged as critical areas requiring further investigation. While early studies focused on intelligent tutoring systems, contemporary research highlights topics like ChatGPT, machine learning, and higher education. The interdisciplinary nature of AI in education is evident through its publication in journals spanning educational technology and related fields. Future research directions emphasize the need for comprehensive studies addressing ethical frameworks and guidelines for responsible AI integration in education. Bridging technological advancements with pedagogical strategies is essential for developing integrative models that enhance personalized learning and educational outcomes. Ongoing bibliometric analyses will play a pivotal role in identifying emerging trends and guiding future research endeavours in AI and education. © 2024, Ozgen Korkmaz. All rights reserved.
Clinical Outcome of Childhood Immune Thrombocytopenia: Experience From a Single Tertiary Center in Turkey
(Yuzuncu Yil Universitesi Tip Fakultesi, 2023) Karaman, K.; Doğan, E.
Immune Thrombocytopenic Purpura (ITP) is the most common hemorrhagic disease in children. Intracranial hemorrhage is the most severe complication requiring the administration of treatment for immune thrombocytopenic purpur a. The present study aims to determine the clinical outcomes and factors affecting remission in childhood ITP. The study included 503 children diagnosed with ITP in a Pediatric Hematology Polyclinic. Patient files and electronic registries were accessed retrospectively to obtain sociodemographic details, and diagnostic and therapeutic characteristics. The mean age of the cases at the time of diagnosis was 6.18±4.30 years. Among all the cases, 446 (88.7%) were in remission. When the first treatments applied in cases with remission were evaluated, 190 (83.4%) patients had IVIG, 25 (56.8%) IVIG + pulse steroid, 34 (79%) pulse steroid, 7 (58%) IVIG + low dose steroid and 20 (83%) had low dose steroid treatment. Four cases developed intracranial hemorrhage during follow-up. The remission rate was significantly higher among the cases with low MPV (Mean platelet volume) values, high platelet counts and sedimentation values in the blood test at diagnosis (p<0.05). The responses to pulse steroids, low-dose steroids and IVIG for the initial treatment at diagnosis were similar, with none showing statistical superiority over any of the others (p>0.05). This study features the largest single-center study in pediatric ITP. The frequency of remission was higher in the ITP-diagnosed cases who were male, who were diagnosed at a younger age, who had no epistaxis on admission, who had a history of URTI, and who had a high platelet count and sedimentation value and a lower MPV value at diagnosis. © 2023, Yuzuncu Yil Universitesi Tip Fakultesi. All rights reserved.
Examining the Influence of Narcissism and Some Demographic Variables on Online Shopping Addiction Via the Exhaustive Chaid Method
(Springer, 2025) Emin, C.; Kayri, M.; Doğan, E.
The literature posits that narcissism may theoretically influence online shopping addiction, with materialism being regarded as a consequence of narcissistic tendencies that subsequently exacerbate shopping addiction. Additionally, it is stated in the literature that age and gender are also associated with online shopping addiction. So, the present study aims to examine the effect of narcissism, age, and gender on online shopping addiction using the exhaustive CHAID analysis. In the research, which was designed as a survey and correlational study, data were collected from 1010 adults using the online shopping addiction scale and narcissism scale. The data obtained were analyzed with descriptive statistics and the exhaustive CHAID method. According to the analysis results, the participant group’s level of online shopping addiction was low, and their level of narcissism was moderate. In line with the results of the exhaustive CHAID analysis, the variables that most related to online shopping addiction were age, gender, and narcissism level. According to the analysis results, online shopping addiction decreases with advancing age. Women in younger age groups are more addicted to online shopping than men. Moreover, the increase in the level of narcissism is a condition that elevates the online shopping addiction of women in younger groups. It is reported in the literature that narcissism is more common in men and younger individuals. However, one of the most important study results is that, in this study, individuals with online shopping addiction are mostly relatively young female participants with high levels of narcissism. © The Author(s) 2024.
Histology of Corpuscles of Stannius in Lake Van Fish (Alburnus Tarichi Güldenstädt, 1814) (Cyprinidae)
(Blackwell Publishing Ltd, 2021) Kaptaner, B.; Ünal, G.; Doğan, E.; Aykut, H.
In the present study, the location, histology and number of corpuscles of Stannius (Sc), which are endocrine glands associated with the kidneys of teleost fish, were investigated for the first time in Lake Van fish (Alburnus tarichi), an anadromous and endemic inhabiting Turkey's Lake Van Basin. The Sc, which were ovoid or spheroid and white or cream in colour, were found to vary in number between three and five among the examined fish. The glands were located in the caudal part of the kidney, and either partially or completely embedded, and found to be present on both the ventral and dorsal surface of either side of the caudal part of the kidney. The Sc were surrounded by a connective tissue capsule that penetrated and divided the gland into incomplete lobules. Two types of cells were determined in the parenchyma of the gland. Type-I cells were predominant throughout the parenchyma and larger than the second (type-II). In the type-I cells, the cytoplasm was observed as weakly or moderately eosinophilic with haematoxylin and eosin staining and weakly or moderately acidophilic with Mallory's triple staining. In the type-I cells, the cytoplasm exhibited weak to moderate periodic acid-Schiff staining and slight or uniform staining with aldehyde fuchsin. The type-II cells were round, had a darkly stained spherical nucleus and were dispersed among the type-I cells. They displayed no cytoplasmic staining with the abovementioned stains. © 2020 Wiley-VCH GmbH
Histology of Some Major Immune System Organs in Lake Van Fish Alburnus Tarichi (Güldenstädt, 1814) (Cyprinidae)
(John Wiley and Sons Inc, 2021) Kaptaner, B.; Aykut, H.; Doğan, E.; Bostancı, M.
The teleostean immune system is variable between and within taxa in terms of morphology. Accordingly, in the current study, the histology of some immune organs (thymus, kidney and spleen) of Lake Van fish (Alburnus tarichi) was investigated. For this purpose, the tissues from eight mature fish were fixed and embedded in paraffin wax, and then the sections were stained with haematoxylin and eosin, Mallory’s triple, periodic acid-Schiff and Alcian blue (pH of 2.5) for histologic examinations. In the thymus, no clear discrimination of the cortex and medulla was observed. Lymphoid cells within a reticulo-epithelial network were the predominant cell type in the thymus. The other components in the thymus were macrophages and myoid, mast-like, plasma-like, cystic cells, Hassall’s corpuscles, and single or multiple epithelial cystic structures. In the kidney, the head kidney, a major haematopoietic site, consisted of lymphoid and non-lymphoid zones within a reticular network. Cells exhibiting mitotic figures were also detected in the haematopoietic tissue of the head kidney. Haematopoietic tissue was also found in the trunk kidney dispersed amongst the excretory components. The spleen was composed of red and white pulp. The red pulp comprised abundant erythrocytes, whilst the white pulp contained leucocytes with a reticular network. Ellipsoids were also determined in the white pulp. Melanomacrophage centres were found in all of the examined lymphoid tissues of the fish. These findings, which were reported, herein, for the first time will provide reference knowledge for future studies of this anadromous fish. © 2021 Wiley-VCH GmbH
Influential Factors on E-Learning Adoption of University Students With Disability: Effects of Type of Disability
(John Wiley and Sons Inc, 2022) Yıldız, G.; Şahin, F.; Doğan, E.; Okur, M.R.
The number of studies providing empirical evidence on e-learning in the field of special education is limited. From this point of view, the aim of this study is to examine whether the factors influencing the e-learning adoption of university students with disability differ according to the type of disability and gender. The participants of the study consist of 809 university students with a single disability (orthopaedic, visual or hearing). Confirmatory factor analysis and two-way ANOVA were used in the analysis of the study. The factor analysis showed that validity and reliability of the measurement tool was established and the model fit was good. The results revealed that for all dependent variables (social influence, self-efficacy, compatibility and facilitating conditions), students with orthopaedic disability and visual impairment had higher scores than students with hearing impairment. On the other hand, contrary to expectations, there was no difference between students with orthopaedic disability and students with visual impairment in any of the factors according to the type of disability. In addition, none of the factors differed by gender. The findings provide empirical evidence that can contribute to the planning of online education processes of students with disability by revealing the similarities and differences in the use of e-learning systems according to the type of disability. Practitioner notes What is already known about this topic The field of special education deals with the special needs of individuals and frequently uses technology to provide the support they need. It is observed that educational processes have been moved to online environments due to the COVID-19 pandemic, which has affected the field of education nowadays and e-learning systems in online environments have become indispensable for students with special needs. With their flexible structure, e-learning systems create universal and inclusive learning environments for all students. Accessibility and special education adaptations are needed for individuals with special needs to use e-learning systems effectively. For this, first of all, the effects of the disabilities of these individuals in using e-learning systems should be determined. What this paper adds The results showed that social influence, self-efficacy, compatibility, and facilitating conditions all differed significantly by type of disability. The research findings revealed that all factors differed significantly in terms of orthopaedic and visual impairment versus hearing impairment. The main contribution of the study can be summarized as investigating the relationships between technology adoption and types of disability with empirical evidence and the fact that the implications and inferences made for theory and practice have the potential to make critical contributions to technology acceptance and use of individuals with special needs. It can be stated that the tool adapted in this study offers a valid and reliable tool for future studies with university students with special needs. Implications for practice and/or policy There is a need for considering the individual differences of participants and adaptations for hearing in the adoption of e-learning systems. Individual differences should be taken into account in the designs of e-learning systems, and user-oriented designs should be given priority. It can be mentioned that providing subtitle support for live lessons and recorded videos for the hearing impairment and adding sign and text support to the audio stimuli, providing screen readers for the visual impairment in the e-learning system can make valuable contributions to improving the quality of education. © 2022 British Educational Research Association.
Measurement of Postoperative Liver Volume Changes in Patients With Gastric Cancer by Computed Tomography
(Yuzuncu Yil Universitesi Tip Fakultesi, 2023) Yokuş, A.; Arslan, H.; Akdemir, Z.; Akbudak, İ.; Almalı, N.; Kotan, Ç.; Doğan, E.
One of the most prevalent cancer worldwide is gastric cancer. Surgical treatment is the only curative method. In this study, we aimed to investigate the changes in liver volume before and after open gastrectomy in patients diagnosed with gastric cancer. We retrospectively analyzed the computed tomography scans of 70 patients who underwent gastric cancer surgery between June 2013 and December 2020. Preoperative and postoperative total liver volume, the volume of segments II-III, and segment IV were measured. The data obtained from volume measurements were compared statistically. Of the 70 subjects included in the study, 48 were male and 22 were female, with an average age of 64.2±11.8 years. In the postoperative phase, the volume of segments II-III and IV dropped significantly compared to the preoperative period (p=0.001 for both). Total liver volume exhibited a mild decrease in the postoperative period, but the total volume loss was not statistically significant (p=0.744). In this study, we detected significant volume loss in segments II-III and segment IV after open gastrectomy. However, the total liver volume reduction was less. © 2023, Yuzuncu Yil Universitesi Tip Fakultesi. All rights reserved.
A Quadricuspid Aortic Valve That Was Misdiagnosed as Rheumatic Carditis: A 13-Year Case
(OrtadogÂ u Reklam Tanitim Yayincilik Turizm Egitim Insaat Sanayi ve Ticaret A.S., 2021) Çetin, M.; Başaranoğlu, M.; Karaman, S.; Doğan, E.
Quadricuspid aortic valve anomaly is a very rare congenital heart anomaly. Its incidence is 0.01-0.04 percent. This anomaly is characterized by the presence of four aortic valves of the same or different sizes. This may often lead to progressive aortic regurgitation or rarely aortic valve stenosis. In aortic valve evaluation with transthoracic echocardiographic, if a careful examination is not performed, the diagnosis of quadricuspid aortic valve may be overlooked or may be misdiagnosed as insidious acute rheumatic carditis. Here, we presented a 13-year-old patient with quadricuspid aortic valve who was admitted to another center with chest pain, and was mistakenly diagnosed with insidious rheumatic carditis due to the aortic regurgitation detected on his transthoracic echocardiographic examination. We aimed to draw attention to this rare congenital heart valve disease. Copyright © 2021 by Türkiye Klinikleri.
The Role of Media Literacy in Online Information: Searching Strategies
(University of Barcelona, 2022) Tatar, İ.; Şahin, Y.L.; Doğan, E.
Along with the spread of Web 2.0 technologies, individuals' habits such as learning, socializing, and getting information have changed rapidly. A lot of information, the accuracy of which cannot be trusted, is available in the web, and it becomes difficult to choose useful, relevant, and accurate information. This pollution is also present in the media. The abilities to choose messages in the media, to look at these messages critically, and to produce your own messages are considered among the 21st-century skills. These reasons bring media literacy (ML) and online information searching strategies (OISS) to the agenda. The processes of ML and OISS have interrelated features. Therefore, it is important and necessary to examine these concepts together. Based on this necessity, the aim of the study was to determine the role of ML in OISS. To this end, the data were collected from 1809 pre-service teachers using the OISS inventory and the ML level determination scale. Data were analyzed by descriptive statistics, MANOVA, and multiple regression analysis. According to the results, pre-service teachers' ML and OISS levels were above the moderate level. ML and OISS vary significantly according to the type of websites. In conclusion, ML was revealed as a predictor variable that could explain OISS at a rate of 33.2%. © 2022 Research Group Education and Virtual Learning (GREAV). All rights reserved.
Virtual Reality Environment in Pharmacy Education: a Cyclical Study on Instructional Design Principles
(John Wiley and Sons Inc, 2024) Doğan, E.; Şahin, Y.L.
Background: It is crucial to use innovative tools to gain clinical reasoning skills through experiential learning in pharmacy education, and one of the most effective tools used in this is virtual reality. However, the lack of research that empirically demonstrates the instructional principles of virtual environment design, especially in the clinical setting, has resulted in a significant gap in the current literature. Aim: In this study, it was aimed to determine the instructional design principles of a virtual environment for the clinical pharmacy. Method: The study was conducted as a design-based research. The data of the study related to three components of the developed virtual reality environment in pharmacy education (VRPE). These components, scenario development interface-scenario development interface, virtual environment, and scenario, were collected through interviews, observation, document review, and a system usability scale. Instructional design principles for the VRPE were determined through analysis of the collected data. Results: The prominent instructional design principles of the VRPE were revealed as immersion, interaction, diversity, flow, aesthetics-ergonomic-universal design, informing, and retest availability. The significance of the study was the adoption of a holistic perspective in the design of a virtual reality environment for pharmacy education. In addition, one of the most critical features of the study was eliminating the expertise barrier in virtual environment design. Thus, it was concluded that the VRPE is an extraordinary tool that can be used for pharmacy education to promote experiential learning. © 2023 John Wiley & Sons Ltd.