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
Resilience of Hospital Structures under Seismic Loads: A Case Study İnformed By The 2023 Maraş Earthquake
(Elsevier Ltd, 2025) Öz, İbrahim
This study investigates the seismic performance of a theoretical hospital building designed as a Fixed-Base (FB) structure according to TSC-2018 (Turkish Seismic Code) and evaluates its behavior under three scenarios: Fixed-Base (FB), Soil-Structure Interaction (SSI), and Base-Isolated (SSI+ISO). The study employs Nonlinear Time History Analysis (NLTHA) using scaled acceleration records, including one from the 2023 Maraş earthquake. Structural performance is assessed based on maximum roof displacements, interstory drift ratios (IDR), and isolator displacements. Results show that base isolation systems significantly reduce drift demands and roof displacements, keeping the structure within slight damage limits even under extreme seismic loads. In contrast, SSI effects amplify interstory drift demands, increasing the likelihood of exceeding moderate damage thresholds. The analysis highlights the Maraş Education and Research Hospital, which suffered severe damage and became non-operational during the 2023 Kahramanmaras earthquake. This outcome underscores the limitations of fixed-base designs in regions with soft soil conditions and the necessity of incorporating base isolation systems to improve seismic resilience. The findings emphasize the importance of mandatory adoption of base isolation systems in hospital designs, proper consideration of SSI effects, and the retrofitting of existing hospital buildings to meet modern seismic code requirements (TSC-2018) and prevent similar failures in future seismic events.
Head Morphology in Three Species of Tiger Beetles (Coleoptera: Cicindelidae): A Geometric Morphometric Study
(Taylor and Francis Ltd., 2025) Koçak, Y.; Doğan Sarıkaya, A.; Sarıkaya, Özkan
Tiger beetles are one of the world’s most studied groups of insects. They are similar in body shape and proportions and have a well-sclerotized head with large protruding eyes that make it wider than the pronotum. Despite body shape being a fundamental metric of animal diversity, the current state of detailed data on tiger beetles’ external morphology needs to be improved. Geometric morphometrics is increasingly used in entomology, representing a powerful tool to capture subtle differences that can aid in taxonomic decisions. Broad literature data provide evidence for the effectiveness of geometric morphometrics in quantifying the differences in size and shape between the sexes in coleopteran species. In contrast, most of the available morphological studies on tiger beetles rely on traditional morphometrics. Here, we examined and compared the head morphology in three species of tiger beetles belonging to the genus Calomera, widely distributed in Turkey, using geometric morphometrics to reveal putative intra- and interspecific differences. While there remain many gaps in our understanding of the processes that contribute to shape differences in closely related species, our study is the first to demonstrate the existence of variations in head shape and size in Anatolian tiger beetles using geometric morphometrics. Additionally, our findings revealed significant differences in shape and size across all three studied species, also showing that head size significantly differs between males and females. This study aims to contribute to the discussion on interspecific and intersexual differences in cicindelids by proposing a methodological approach that could represent a valuable investigative tool.
Pre- and Postoperative Evaluation of the Changes in Anthropometric Parameters on Female Laparoscopic Sleeve Gastrectomy Patients: A Cross-Sectional Follow-Up Study
(Mary Ann Liebert Inc., 2025) Ulcay, Tufan; Görgülü, Özkan; Öncü, Ruken; Uğuz, Emre; Aladağ, Muhammed Fırat; ...; Yağmur, Berat
Background/Aims: Obesity is a major global health issue, exacerbated by reduced physical activity due to technological advancements. Bariatric surgery is the most effective treatment for significant weight loss. This study examines 2-month postoperative changes in anthropometric parameters, muscle strength, and regional fat reduction in female patients. Materials and Methods: In this observational prospective study, anthropometric measurements were collected from female patients who underwent laparoscopic sleeve gastrectomy between October 2022 and March 2023. Data were recorded preoperatively and at the first and second months postsurgery. Results: A significant reduction in skinfold thickness, indicative of fat mass reduction, was observed, alongside a marked improvement in grip strength within the 8-week postoperative period. Conclusion: This study is notable for being the first to comprehensively evaluate short-term changes in skinfold thickness following bariatric surgery. In addition, it is pioneering in its application of the pinch strength test alongside the hand grip strength test in this context.
Potential Of Be2FeX (X = Ag, Au, Cd, Cu, Ga, Zn) Heusler Alloys for Spintronics and Energy Conversion Technologies
(Springer, 2025) Albayrak, Erol
The aim of this study is to investigate the structural, electronic, magnetic, elastic and thermodynamic properties of Be2FeX (X = Ag, Au, Cd, Cu, Ga, Zn) Heusler alloys. These alloys, which contain the elements Be and Fe, have important applications, particularly in the aerospace industry, although they have attracted attention due to their toxic nature. Calculations using Quantum Espresso and Thermo Pw packages based on the DFT approach showed that all alloys are mechanically stable according to born stability criteria. The Be2FeAg alloy, with its moderate hardness and ductility, is suitable for structural applications where high hardness and ductility are not required. The metallic conductivity of the alloy suggests potential applications in areas such as spintronic devices, energy conversion and storage devices. Be2FeAu alloy is suitable for applications requiring mechanical strength with low ductility and medium hardness (Young’s modulus value of 161.93 GPa). Be2FeCd alloy offers significant potential for magnetic data storage and sensing applications due to its high ductility and metallic conductivity (B/G rate of 2.35). Be2FeCu alloy, with its high hardness (Young’s modulus value of 241.862 GPa) and low ductility, is ideal for applications where mechanical strength is critical. Be2FeGa alloy, with its flexible structure (B/G rate of 3.55), is suitable for energy efficiency and optoelectronic devices. Be2FeZn alloy, with its medium hardness (Young’s modulus value of 164.29GPa) and ductility (B/G rate of 2.16), has the potential for use in high temperature applications. Understanding the properties of these alloys can provide guidance for future technological applications and new materials development processes.
Special Functions with General Kernel: Properties and Applications to Fractional Partial Differential Equations
(Sciendo, 2025) Ata, Enes; Kıymaz, İsmail Onur
In this paper, we reconstruct gamma and beta functions using a general kernel function in their integral representations. We also reconstruct the Gauss and confluent hypergeometric functions using the beta function with general kernel in their series representations. The general kernel function we use here can be chosen as any special function such as the exponential function, Mittag-Leffler function, Wright function, Fox-Wright function, Kummer function or M-series. Using different choices of this general kernel function, various of the generalized gamma, beta, Gauss hypergeometric and confluent hypergeometric functions in literature can be obtained. In this paper, we first obtain the integral representations, functional relations, summation, derivative and transformation formulas and double Laplace transforms of the special functions we construct. Furthermore, we compute the solutions of some fractional partial differential equations involving special functions with general kernel via the double Laplace transform and graph some of the solutions for specific values. Finally, we obtain the incomplete beta function with general kernel by defining the beta distribution with general kernel.
