Kırşehir Ahi Evran Üniversitesi Kurumsal Akademik Arşivi
DSpace@Kırşehir, Kırşehir Ahi Evran 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 etkisimi artırmak için telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Green Office Practices: Sustainability Approaches in Office Management
(Ebru Bagci, 2025) Demirkan, Songül
The purpose of this research is to examine the awareness, perception, and experiences of the faculty members working in the Office Services and Secretarial Department in Türkiye regarding green office applications. In the study, the faculty members’ perspectives on the concept of green office, the place of green office applications in education, their application experiences, and their views on the future were investigated. The research was conducted with the phenomenology design, one of the qualitative research designs, and a structured interview form was used as the data collection tool. The study group consists of faculty members who have been working for five years. The data were analyzed using the content analysis method, two researchers were asked to theme the data to ensure reliability, and the agreement percentage (89%, 91%) was calculated. According to the research results, green office appli cations are addressed in the context of environmental and economic sustainability, and the emphasis on social sustainability remains limited. Green office applications, which are associated with functions such as efficiency in resource use, environmental awareness, and corporate responsibility, are not given sufficient space in education programs, and there is a lack of systematic information. In this context, the research makes an original contribution to the field with suggestions regarding sustainability-oriented regulations in office management education and its adaptation to vocational education.
Analysis of Barrier İnhomogeneity in Sic Schottky Diodes with P3HT: PCBM İnterfaces Over A Wide Temperature Range
(Springer, 2025) Güzel, Tamer
Research on the metal–semiconductor interface continues due to its significant impact on the electrical characteristics of Schottky diodes. In this study, a Schottky diode with the structure Au/P3HT: PCBM/6H–SiC/Al was fabricated, and its current–voltage characteristics were analyzed over a wide temperature range of 80–375 K. Using these characteristics, the ideality factor (n), barrier height (Φb), resistance (Rs), and saturation current (Io) parameters of the diode were calculated with the help of the Thermionic emission model, Cheung-Cheung, and Norde functions. The correlation between these parameters was also examined. The Richardson constant (A*) was determined using the Richardson plot. Furthermore, the barrier inhomogeneity was analyzed based on a Gaussian distribution model. Although the barrier height has an inhomogeneity showing a double Gaussian distribution that varies with temperature, the effect of voltage deformation was determined to be stable at all temperatures.
Evaluation of Thiol/Disulfide Homeostasis and İschemia‑modified Albumin Levels in Symptomatic Dermographism
(Wolters Kluwer Medknow Publications, 2025) Metin, Mahmut Sami; Tehçi, Tuğba; Kolukırık, İlkay; Akoğul, Serkan; Öner, Ümran; Metin, Zuhal
Background: Symptomatic dermographism (SD) is the most common chronic inducible urticaria (CIndU) type. Thiol/disulfide homeostasis (TDH) and ischemia‑modified albumin (IMA) levels are indicators of oxidative stress. Aim: Our study aims to investigate the role of thiol/disulfide balance and IMA levels in the pathogenesis of SD. This focus guides our research and helps us to better understand the disease. Materials and Methods: This cross‑sectional study, conducted with utmost care and precision, included 50 SD patients and 50 healthy volunteers. The patients and controls were meticulously evaluated regarding IMA, native thiol, total thiol, and disulfide levels and disulfide/native thiol, disulfide/total thiol, and native thiol/total thiol ratios, ensuring a thorough and reliable understanding of the data. Results: In our study, the patient group demonstrated significantly higher levels of native thiol, total thiol, disulfide, and IMA values than the control group (P < 0.05). Conclusions: In patients with SD, impaired TDH and increased IMA suggest that oxidative stress may play a significant role in the disease pathogenesis, underscoring the importance of our findings.
Using as Screw of PEEK in Femur Neck Fractures as an Alternative Biomaterial
(Springer, 2025) Kurt, Cengizhan; Gök, Arif; İnal, Sermet; Urtekin, Levent; Gök, Kadir
Titanium screws used in femoral neck fracture fixation may lead to issues such as stress shielding and localized stress concentration. This study investigates the feasibility of using polyether-ether-ketone (PEEK) screws arranged in a triangular configuration as a potential alternative. Mechanical performance, biocompatibility, and load-bearing capacity are significant for these applications. Finite element analysis (FEA) revealed that PEEK screws exhibited a lower insertional stress of 92.26 MPa but experienced higher fracture line stress (79.96 MPa), gap (0.50 mm), and penetration (0.0074 mm), indicating increased micromotion. The calculated safety factor was 1.0297, which is adequate for average patients but may not ensure safety under high-load conditions. Compared to titanium, PEEK offered improved stress distribution and fatigue resistance but also demonstrated mechanical limitations. Overall, PEEK screws show promise as a bioinert and radiolucent alternative in orthopaedic applications, yet further optimization is needed for broader clinical adoption in high-demand scenarios.
The Scottish İnflammatory Prognostic Score: A Novel Biomarker for Predicting İn-Hospital Mortality in Acute Heart Failure with Reduced Ejection Fraction
(Elsevier Inc., 2025) Taş, Alperen; Tunca, Çağatay; Tanık, Veysel Ozan; Özlek, Bülent
Background: Acute heart failure with reduced ejection fraction (AHF) remains a leading cause of ED visits, hospitalizations, and in-hospital mortality. Objectives: To evaluate the prognostic utility of the Scottish Inflammatory Prognostic Score (SIPS) in patients with AHF. Methods: This retrospective study analyzed 508 patients admitted with AHF between November 2022 and November 2024. The SIPS was calculated based on albumin and neutrophil levels. Clinical and laboratory parameters were compared between survivors and non-survivors to identify predictors of all-cause in-hospital mortality. Results: At a median follow-up of 10 days (range 4–28), 63 patients (12.4 %) died. The mean age of the study population was 63 years, with non-survivors being older on average. Multivariable Cox proportional regression analysis revealed high SIPS values (HR: 2.335, 95 % CI: 1.044 - 5.221, p = 0.039), advanced age, elevated NT-pro-BNP levels, chronic renal failure, and low serum sodium as independent predictors of in-hospital mortality. When patients were categorized by SIPS scores of 0, 1, and 2, the associated mortality rates were 5.1 %, 14.0 %, and 46.0 %, respectively (p < 0.001). Additionally, ROC curve analysis indicated that a SIPS threshold of 0.5 effectively predicted in-hospital mortality, demonstrating a sensitivity of 77 % and a specificity of 58 % (95 % CI: 0.661–0.803, p < 0.001). Conclusions: This study is the first to analyze the association between SIPS and in-hospital mortality in patients with AHF. Integrating SIPS with other established risk factors may help improve the identification of high-risk AHF patients who could benefit from closer monitoring and intensified therapy, though further validation is warranted.
