Recep Tayyip Erdoğan Üniversitesi Kurumsal Akademik Arşivi
DSpace@RTEÜ, Recep Tayyip Erdoğan Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve yayınların etkisini artırmak için telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
A bibliometric analysis of alternative medicine practices: insights for wellness tourism and culinary health studies
(Routledge, 2026) Yıldırım, Gülsün
This study aims to explore the scientific landscape of alternative medicine practices through bibliometric analysis and to interpret their relevance and potential contributions to wellness tourism and culinary health research. A bibliometric analysis was conducted on publications indexed in the Web of Science database from 1980 to 2024 using the search term “alternative medicine practices” in all fields. VOSviewer software was employed to analyse trends in publication volume, leading countries, institutions, authorship networks, and keyword occurrences. The analysis identified 13 thematic clusters, mainly focused on integrative medicine, mind-body therapies, oncology, and primary care. Particular attention was given to how the identified clusters and trends intersect with tourism and gastronomy. Indirect associations with tourism and gastronomy reflected in education, nutrition, and wellness-related terms were also detected, though their representation remains limited. The number of publications increased steadily from 1980 to 2021, with a notable surge during the COVID-19 pandemic, reflecting intensified interest in holistic health, preventive care, and dietary well-being. The findings indicate that alternative medicine practices research remains predominantly biomedical but shows emerging bridges with experiential domains such as wellness tourism and culinary health. These insights provide a basis for future interdisciplinary studies linking health, food, and tourism within integrative frameworks.
Investigation of the super-lift Luo converter controlled with PI and SM control for electric vehicle battery sources
(Elsevier, 2026) Kaba, Bengisu; Tören, Murat; Şahin, Mustafa Ergin
This study examines the efficacy of a super-lift Luo converter for electric vehicle (EV) battery applications, aiming to determine an appropriate control strategy under fluctuating voltage situations. The converter is controlled by two methods: sliding mode control (SMC) utilizing pulse width modulation (PWM), and the traditional proportional-integral (PI) controller. A comprehensive comparative analysis is conducted in MATLAB/Simulink by modeling the converter using both continuous DC and lithium-ion battery voltage sources. The simulation findings indicate that an input of 12 V produces 36.07 V with SMC and 36.27 V with the battery source, while SMC attains an efficiency of 91.25 %. In comparison to the PI controller, SMC demonstrates a more rapid settling time and enhanced dynamic response in variable voltage settings. This simulation-based work offers significant insights into the selection of control algorithms for modern DC-DC converters utilized in electric vehicle systems. The findings demonstrate that SMC-controlled super-lift Luo converters provide a reliable and effective solution for electric vehicle battery systems.
Test characteristics of emergency physician-performed point-of-care ultrasound for the diagnosis of intrauterine pregnancy: a systematic review and meta-analysis
(Springer, 2026) Çelik, Ali; Hamdioğlu, Enes
Point-of-care ultrasound (PoCUS) has emerged as a critical tool for diagnosing intrauterine pregnancy (IUP) in symptomatic first-trimester patients, particularly in emergency settings. This meta-analysis aims to evaluate the test characteristics of PoCUS in diagnosing IUP. As a secondary objective, this study will also examine the accuracy of PoCUS in detecting fetal cardiac activity (FCA). This systematic review and meta-analysis was conducted following the PRISMA-DTA guidelines with the protocol registered in PROSPERO (ID: CRD42024596206). We performed a comprehensive search of PubMed, Scopus, Web of Science, Cochrane Library and Google Scholar up to November 2024, identifying studies that compared PoCUS to reference standards for IUP diagnosis. Seven studies (n = 1716) were included in the meta-analysis. Two independent reviewers performed study selection, data extraction, and quality assessment using the QUADAS-2 tool. A bivariate random-effects model was used to pool the diagnostic accuracy metrics. In this meta-analysis, PoCUS demonstrated a pooled sensitivity of 86.3% (95% CI: 75.6%–92.8%, I2 = 89.8%) and a specificity of 98.2% (95% CI: 86.6%–99.8%, I2 = 72.6%) for the identification of IUP. Sensitivity analysis showed a significant decrease in heterogeneity for specificity (from 72.6% to 0%), along with a slight increase in sensitivity (88.5%). The pooled positive likelihood ratio was 39.01 (95% CI: 16.00–95.1), and the negative likelihood ratio was 0.10 (95% CI: 0.05–0.21). Moreover, subgroup analysis revealed higher sensitivity (92%) in studies using transvaginal ultrasound as the reference standard. In addition, PoCUS demonstrated high specificity (100%) and variable sensitivity (81–96%) for identifying FCA across three studies, but the limited number of studies prevented further meta-analysis. PoCUS is highly effective for diagnosing IUP in symptomatic first-trimester patients, allowing for the ruling out of ectopic pregnancy. However, when PoCUS is negative or indeterminate, follow-up strategies such as serial β-hCG, repeat ultrasound, or clinical reassessment remain essential to ensure diagnostic safety.
The thrombopoietic signature of preeclampsia: diagnostic and monitoring insights from the immature platelet fraction
(Multidisciplinary Digital Publishing Institute (MDPI), 2026) Er, İlkay; Şentürk, Şenol; Arpa, Medeni; Kuruca, Nalan
Background: Preeclampsia is a major obstetric disorder characterized by platelet activation and dysregulated thrombopoiesis. While conventional platelet indices reflect platelet morphology, the immature platelet fraction (IPF) provides insight into thrombopoietic activity. This study assessed IPF discrimination at presentation and its early post-treatment change in preeclampsia while controlling for potential confounding factors. Methods: In a prospective design, demographic and laboratory parameters—particularly platelet indices—were evaluated in women with preeclampsia and normotensive pregnant controls. Measurements were obtained at diagnosis and repeated 24–48 h after treatment, including initiation of medical treatment or delivery. Logistic regression and ROC analyses were performed, adjusting for age and gestational age. Results: Sixty-four women with preeclampsia and 25 normotensive controls were included; the preeclampsia group was older (31.3 ± 5 vs. 28.4 ± 4 years), and delivery occurred in 73.4%. At diagnosis, IPF, MPV, and PDW were higher, and platelet counts were lower compared with controls. After treatment, IPF decreased markedly (ΔIPF = 3.4; p < 0.001), accompanied by reductions in MPV and PDW, while platelet counts remained unchanged in the preeclampsia group. ΔIPF showed subtype-related differences, being higher in late-onset preeclampsia. Only IPF retained an independent association with preeclampsia (OR = 27.29; p = 0.006), whereas age, platelet count, MPV, PDW, BUN, and CRP were not significant. On ROC analysis, IPF demonstrated strong diagnostic performance (AUC = 0.992; cut-off ≥4%), with 98.4% sensitivity and 100% specificity. Conclusions: Easily measurable as part of a routine complete blood count, IPF may support diagnostic evaluation and clinical monitoring, consistent with its early post-treatment decline and subtype-related patterns.
Growth study of Sarpa salpa in the Aegean Sea using three growth models
(Elsevier, 2026) Bayhan, Bahar; Kara, Ali; Kurtul, Irmak; Minaz, Mert; Haubrock, Phillip J.; Tarkan, Ali Serhan; Kaya, Cüneyt
In the Mediterranean, Salema Sarpa salpa is among the most economically important coastal fishes. Yet a major gap in its region-specific, and sex-disaggregated data on biology and growth constraining both precise stock assessments and long ecosystem-based fisheries management strategies in the eastern Mediterranean. To address this data deficiency, this study presents an integrative analysis of the species' biological traits, growth parameters, and population structure in İzmir Bay (eastern Aegean Sea, western Türkiye), using a full annual sampling of 319 individuals. Caught individuals comprised 105 males, 82 females, and 132 hermaphrodites. Total length ranged from 16.7 to 38.0 cm, with the most frequent class lengths being 24.1–27.0 cm (29 %) and 27.1–30.0 cm (25 %). The species exhibited isometric growth (b ≈ 3), indicating that weight increases proportionally with length, while gonadosomatic index trends revealed that spawning occurs mainly in autumn. Among the three tested growth models (von Bertalanffy, Gompertz, Logistic), the von Bertalanffy model provided the best fit for the overall population (L∞ ≈ 46.6 cm, K ≈ 0.08), the Gompertz model for males (L∞ ≈ 35.9 cm, K ≈ 0.20), and the von Bertalanffy again for females and hermaphrodites (L∞ ≈ 38–43 cm). These findings indicate proportional length–weight growth and an autumn spawning period. Analysis of otoliths indicated that age-length relationships followed smooth growth patterns, with female size exceeding males in later age classes. Collected data on Sarpa salpa in İzmir Bay provides valuable baseline data for this species’ regional biology; knowledge crucial to fishery management, stock assessment, and ecological monitoring that may serve as a foundation for sustainable conservation of the Aegean Sea.
