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Article On a Boundary Value Problem for a Class of Second-Order Complex Partial Differential Equations(Univ Simon Bolivar, 2023) Aksoy, Umit; Celebi, Ahmet OkayIn this article, a boundary value problem for a second-order complex partial differential equation whose main part is the Laplacian, is introduced and its solvability is discussed by reduction of the problem into the Schwarz problem for a first-order equation. The condition for solvability is presented and an estimate for the unique solution is provided.Article Citation - WoS: 3Citation - Scopus: 3How Do Implant Threads and Diameters Affect the All-On Success? a 3d Finite Element Analysis Study(IOS Press BV, 2022) Zor,Z.F.; Klllnç,Y.; Erkmen,E.; Kurt,A.; Kilinc, YelizBACKGROUND: The effect of different thread designs and diameters on the all-on-four concept is unclear. OBJECTIVE: The aim of the study was to clarify the differences in stress distribution of dental implants with various thread designs and diameters based on the all-on-four concept with three dimensional (3D) finite element analysis (FEA). METHODS: A 3D model of a totally edentulous mandible was used to perform the FEA. Four different models (M1, M2, M3, and M4) including 3.5 and 4.3 mm diameter dental implants with active and passive threaded designs were generated. The dental implants were positioned according to the all-on-four concept. The Von Mises stresses on dental implants and maximum and minimum principal stresses (Pmax and Pmin) on bony structures were calculated under vertical, oblique and horizontal loads. RESULTS: For Von Mises stresses, the highest stress values were detected on the distal implants for all models. Distal implants had also the highest stress values for vertical loading. The Von Mises stresses were found to be concentrated around the implant's neck. In all models the highest Pmax and Pmin stresses occurred in the bone surrounding the distal implant. It was noted that the active threaded implants showed the highest Pmax and Pmin stress values. CONCLUSION: The implant thread design and diameter might have a strong influence on the stress values in the all-on-four concept. © 2022 - IOS Press. All rights reserved.Article The Effect of Endurance-Based Sports on Athlete Success and Psychological Well-Being(Campus Educa Sports Sl, 2025) Ozpinar, Saliha; Yucel, Ali Serdar; Korkmaz, Murat; Oztas, Dilek; Kuyucu, Mihalis Michael; Aras, Goksen; Yüce, Ali SerdarThe aim of this study is to examine the effects of psychological resilience on sport success and mental health. The relationships between commitment, control and challenge, which are sub-dimensions of psychological resilience, and sport success and psychological wellbeing were evaluated and discussed in detail. Today, the problems arising due to the increasing competitive environment and stress factors have made it more important for athletes to be psychologically strong. Although the relationship between psychological resilience and sport success has been previously examined in the literature, studies evaluating the individual effects of the sub-dimensions of resilience in a large sample group are quite limited. This study aims to overcome this deficiency and make an up-to-date contribution to the subject. A total of 684 students (72 percent male, 28 percent female) studying at the Faculties of Sport Sciences of 16 universities in Istanbul, Ankara, Izmir, Bursa and Antalya participated in the study. Participants completed the Resilience Scale and Mental Health Inventory, and their sporting achievements were evaluated by their coaches using the Sport Achievement Scale. Data were collected via Google Forms (R) and analysed using SPSS 22.0 software with correlation, regression and Granger causality tests. The findings revealed that all resilience sub-dimensions showed positive and significant relationships with sport achievement ( R-2=0.93) and psychological well-being (R-2=0.68). Especially control and challenge factors had the strongest effects. As a result of the research, commitment, control and challenge, which are the sub-dimensions of psychological resilience, significantly affect both success levels and psychological well-being of athletes. Therefore, resilience development programmes for athletes should focus on these areas.Article Toxoplasma gondii Coinfection in HIV-Positive Patients at a Tertiary Care Hospital(Bentham Science Publ Ltd, 2025) Kurkcu, Muhammed Furkan; Bakir, Ayfer; Kaba, Semiha Berra Topsakal; Kusabbi, Ilknur Alkan; Usluca, SelmaIntroduction: Toxoplasma gondii (T. gondii) can cause serious complications in both immunocompetent and immunosuppressed individuals. This study aims to assess the seroprevalence of T. gondii among HIV-positive individuals and to investigate its association with age, sex, CD4+ T cell count, HIV RNA levels, and hematological parameters. Methods: This study included 247 HIV-positive individuals followed up at a tertiary care hospital between November 1, 2022, and November 30, 2024. We analyzed serum samples for T. gondii IgG antibodies using electrochemiluminescent microparticle immunoassay. Results: The prevalence of T. gondii IgG seropositivity was found to be 32.8% (n=81; 95% CI: 26.9-39). The median age of seropositive individuals was 52 years (IQR: 42-61), which was significantly higher compared to seronegative individuals (p<0.001). The highest IgG seropositivity rate (66.7%) was observed in the 61-80 age group. Hemoglobin levels were significantly lower in IgG seropositive individuals (p=0.040). Logistic regression analysis indicated an increased risk of T. gondii infection with advancing age. The odds ratio for the 41-60 age group was 13.3 (95% CI: 1.6-106, p=0.02), while for the 61-80 age group, it was 28 (95% CI: 3.3-240, p=0.002). Discussion: The seroprevalence of T. gondii in HIV-positive individuals was lower than both global and regional averages. Age was identified as an independent risk factor for T. gondii seropositivity. Additionally, hematological alterations associated with anemia were observed in seropositive individuals. Further large-scale, multi-center, and regionally representative studies are required to optimize T. gondii infection management and screening strategies in people living with HIV. Conclusion: These findings suggest that T. gondii infection in HIV-positive individuals increases with age and may be associated with anemia, highlighting the need for age-focused screening and management strategies.Article Investigation of Tetanus Seropositivity Levels in Adult Patients with Rabies Risk Exposure Admitted To a Hospital in Ankara(J Infection Developing Countries, 2025) Gurkaynak, Pinar; Demircan, Serife A.; Tulek, Necla; Kinikli, Sami; Erdinc, Fatma S.; Tuncer, GunayIntroduction: This study aimed to assess tetanus seropositivity levels among adult patients admitted to a tertiary care hospital following rabies risk exposure, and to explore potential factors influencing their immunological status. Methodology: This cross-sectional descriptive epidemiological study included 182 adult individuals (68 females and 114 males) who presented to the hospital following rabies risk exposure. The demographic data was collected during a face-to-face interview, and the tetanus antibody concentrations were assessed using a micro-enzyme-linked immunosorbent assay (ELISA) kit. Serum antibody levels of >= 0.1 IU/mL were defined as "seropositive", while values below this threshold were considered "seronegative". Results: Seropositivity was identified in 81.9% of the patients. There was a significant decline in antibody levels with age (p < 0.001). The Spearman correlation analysis showed a moderately significant negative correlation between age and antibody titers (r = - 0.404, p < 0.001). In addition, there were significantly higher tetanus antibody levels in patients from urban areas, those vaccinated during pregnancy, and those vaccinated within the past 10 years (p = 0.025, 0.036, and 0.013, respectively). Conclusions: Overall, the results highlight a reduction in tetanus antibody levels with age, emphasizing the importance of receiving a booster dose every 10 years. In addition, rabies risk exposure, particularly in older adults, presents a valuable opportunity to administer tetanus vaccination.Conference Object Citation - Scopus: 4Quantum Machine Learning in Intrusion Detection Systems: a Systematic Mapping Study(Springer Science and Business Media Deutschland GmbH, 2024) Faker,O.; Cagiltay,N.E.The integration between quantum computing (QC) and machine learning algorithms (ML) aims to speed up computing processes and increase model accuracy rates, and this is what led developers and researchers to exploit this feature to study improving the performance of intrusion detection systems (IDSs). In this work, we present a systematic mapping review (SMR) of the most important works in the field of using quantum machine learning (QML) to increase the efficiency of anomaly detection techniques, which depend mainly on ML. After defining and applying the research methodology, the preliminary search results amounted to 240 studies from four databases. According to the exclusion and inclusion reports, we obtained 21 main studies. After reviewing and analyzing the results, the four research questions were answered. The review focused on the development of integration of intrusion detection systems with QML, the characteristics of such integration, increasing the efficiency of ML algorithms, and future research opportunities in this field. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.Conference Object Citation - Scopus: 1Extractive Text Summarization for Turkish: Implementation of Tf-Idf and Pagerank Algorithms(Springer Science and Business Media Deutschland GmbH, 2023) Akülker,E.; Turhan,Ç.Due to the massive amount of information available on the web, reaching the desired content has become more and more difficult. Automatic text summarization helps to solve the problem by minimizing the document size while keeping its core information. In this study, two extractive single document automatic text summarization systems for Turkish are presented which implement the statistical-based TF-IDF algorithm as well as the combination of TF-IDF with the graph-based PageRank algorithm. The study aims to reveal the usability and effectiveness of these algorithms for Turkish documents. Moreover, the results of the TF-IDF implementation and the hybrid approach are compared using the co-selection measures, precision, recall, and F-score. In the evaluation phase, the system-generated summaries are categorized and tested based on their word sizes and the predetermined thresholds and compared against the human-generated summaries. The results indicate that the hybrid system performs better than the TF-IDF system even in lower thresholds, and also both systems are inclined to improve average F-scores in higher threshold generated summarization. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.Article Besir Fuad's voltaire: Liberating the Individual(Routledge Journals, Taylor & Francis Ltd, 2022) Muhurcuoglu, KorhanBesir Fuad (1852?-1887) is an obscure figure among late nineteenth century Ottoman intellectuals known for his materialistic views which were unprecedented under the Hamidian regime (1876-1909) and who shocked his contemporaries by committing suicide at an early age, leaving a note and a letter containing his last impressions and world view. Just months before his suicide, Besir Fuad published a Voltaire biography in which he commemorates him as an Enlightenment ideal to be emulated in humankind's struggle against religious intolerance. In this article, Besir Fuad's Voltaire (1886) is examined, arguing that the monograph was, though in an embryonic form, an early expression and defence of individual liberty, based on a materialistic world view that aims at demystification of the prevailing customs and morals as irrational and superstitious absurdities to pave the way for a future society in which the individual would be in liberty.Article Türkiye’de Fizyoterapi ve Rehabilitasyon Alanında, Öğrenci, Akademisyen ve Klinisyen Bakış Açısıyla Kanıta Dayalı Uygulamanın Yeri: Pilot Çalışma(Turkey Assoc Physiotherapists, 2025) Akınoğlu, Bihter; Bengüboz, Fatma Büşra; Arıkan, ZeynepAmaç: Kanıta dayalı uygulama (KDU), yüksek kaliteli klinik araştırmalara ve uygulamalara dayanan bir yöntemdir. Dünya Fizyoterapi Konfederasyonu’na göre KDU eğitimi fizyoterapi uygulama önerilerinin başında gelmelidir. Çalışmamızın amacı Türkiye’de fizyoterapi ve rehabilitasyon alanında, öğrenci, akademisyen ve klinisyen bakış açısıyla KDU’nun yerini ve önündeki engelleri araştırmaktır. Yöntem: Çalışma pilot çalışma olarak planlanmıştır. Çalışma süresince ulaşılabilecek bütün fizyoterapi ve rehabilitasyon alanında olan öğrenci, akademisyen ve klinisyenler ile çalışma gerçekleştirilmiştir. Değerlendirmede 28 sorudan oluşan “KDU Ölçeği” ve çalışmacılar tarafından hazırlanan KDU konusundaki görüşler, bilgi seviyesi, önündeki engellerin sorgulandığı bir form kullanılmıştır. Çalışma verileri web tabanlı bir form oluşturularak toplanmıştır. Bulgular: Çalışmamız 44 öğrenci, 22 akademisyen ve 31 klinisyen olmak üzere toplam 97 kişi ile gerçekleştirilmiştir. KDU’yu engelleyen faktörler cevaplarında “Order (tedavide hekim talimatı) almak” öğrencilerde %51,06, akademisyenlerde ve %31,57 klinisyenlerde %33,33 oranla ilk engel olarak belirtilmiştir. KDU ölçeği toplam puanları üç grup arasında karşılaştırıldığında istatistiksel olarak anlamlı farklar olduğu tespit edilmiştir (p=0,000). Sonuç: Çalışmamızın sonuçlarına bakıldığında farklı alanlarda bulunan fizyoterapistlerin KDU bilgi ve tutumlarının farklılıklar gösterdiği fakat ortak olarak Türkiye’de fizyoterapi ve rehabilitasyon alanında, öğrencilerin, klinisyenlerin ve akademisyenlerin KDU zorlaştırıcılarının başında “Order almak” faktörünün olduğu görülmüştür.Article Representation of Omitted Variable Bias With the Total Derivative Method(Universal Wiser Publisher, 2024) Omay, Tolga; Elitas, ZeynepThis study aims to provide an understanding of the concept of omitted variable bias through the total derivative method. This novel approach that is often overlooked could bring a new perspective to statisticians, econometricians, or researchers in neighboring disciplines such as social sciences, management, or economics. In order to complement this mathematical method, the study also employs graphical representations. By doing so, we provide a detailed walkthrough of the total derivative method, its visual depiction, and its application to the omitted variable bias. We believe that this approach can enhance the understanding of regression analysis and foster a deeper connection between mathematics and econometrics. Overall, this study can contribute to the development of new theoretical foundations using the total differential method in this context.
