FSM Vakıf Üniversitesi Araştırma ve Akademik Performans Sistemi
DSpace@FSM, FSM Vakıf Üniversitesi’nin bilimsel araştırma ve akademik performansını izleme, analiz etme ve raporlama süreçlerini tek çatı altında buluşturan bütünleşik bilgi sistemidir.
Güncel Gönderiler
Öğe Türü: Öğe , A Microstrip Monopole Antenna Design for 5G Sub-6 GHz Applications Using Deep Learning(Wiley, 2026) Çolak, Berker; Belen, Mehmet Ali; Kiani, Farzad; Tari, Özlem; Mahouti, Peyman; Akgöl, OğuzhanThis study presents the design and optimization of a microstrip monopole antenna for 5G sub-6 GHz applications, employing a deep learning-based surrogate model combined with honeybee mating optimization (HBMO). The studied antenna structure employs air via arrays, intended to enhance antenna performance, including improved impedance matching and increased bandwidth. It is important to note that, unlike conventional antennas, the proposed design does not include a fully enclosed metallic cavity similar to a substrate integrated waveguide (SIW) antenna designs. A sensitivity analysis was conducted to assess the impact of these parameters, emphasizing the need for optimal tuning. To generate training and test datasets efficiently, Latin hypercube sampling (LHS) was used. A convolutional neural network (CNN) surrogate model was trained, outperforming other machine learning (ML) algorithms in predictive accuracy and generalization. The proposed CNN-HBMO framework reduced computational costs by minimizing the need for expensive electromagnetic (EM) simulations, enabling rapid design space exploration. The optimized antenna was fabricated and validated through experimental measurements, achieving 2–3 dBi gain and 𝑆11 < − 10 dB across the 2.7–5.2 GHz band. Compared to existing designs, the proposed antenna offers a compact size (34 ×34 mm) with competitive performance, making it suitable for multi-band 5G applications.Öğe Türü: Öğe , Değersizlik Temel İnancı ve Öz Eleştirel Ruminasyon İlişkisinde Narsisistik ve Borderline Kişilik Bozukluğu Eğilimlerinin Aracı Rolü(Association for Clinical Psychology Research, 2026) Korkmaz, Kübra Nur Çömlekçi; Kumova, FilizYeni bir kavram olan öz eleştirel ruminasyon, zihinde tekrarlayan olumsuz öz eleştirel süreçleri içermektedir ve sınırlı sayıda çalışmaya konu olmuştur. Çalışmanın amacı, değersizlik negatif temel inancı ile öz eleştirel ruminasyon arasındaki ilişkide narsisistik ve borderline kişilik bozukluğu eğilimlerinin aracı rolünü incelemektir. Çalışma 18 yaş ve üstü, 498 kadın (%83,4), 97 erkek (%16,2) ve diğer seçeneğini işaretleyen 2 katılımcıdan (%0,03) oluşan 597 kişilik bir katılımcı grubu ile gerçekleştirilmiştir. Çalışmada demografik bilgi formu, Öz eleştirel Ruminasyon Ölçeği, Olumsuz Çekirdek İnanışlar Ölçeği ve Coolidge Eksen II Plus Envanteri kullanılmıştır. Narsisistik ve bor-derline kişilik bozukluğu eğilimlerinin öz eleştirel ruminasyon ve değersizlik negatif temel inancı arasındaki ilişkide aracılık rollerini ince-lemek için SPSS Process makrosu kullanılmıştır. Analizler sonucunda, değersizlik negatif temel inancı, narsisistik ve borderline kişilik bozukluğu eğilimlerinin öz eleştirel ruminasyonu pozitif yönde yordadığı; değersizlik negatif temel inancı ile öz eleştirel ruminasyon arasındaki ilişkide hem narsisistik hem de borderline kişilik bozukluğu eğilimlerinin aracılık rolü olduğu belirlenmiştir. Bu araştırmanın sonuçlarına göre, psikoterapi sürecini ve sonuçlarını son derece olumsuz etkileyen öz eleştirel ruminasyon ile çalışırken değersizlik negatif temel inancı, narsisistik ve borderline kişilik bozukluğu eğilimleri ile de çalışmanın gerekliliği ortaya çıkmaktadır.Öğe Türü: Öğe , Depth Defect Analysis of BaO Thin Films Doped with Cd Via Positron Annihilation Techniques(Taylor & Francis, 2026) Dahamni, Mohamed El Amine; Hamzaoui, Nassima; Ghamnia, Mostefa; Yener, Murat Yavuz; Yumak, Ayşe; Tav, Cumali; Yahşi, UğurThin films of pure and cadmium-doped barium oxide (BaO) with 2, 4, and 6 wt% Cd were made using the spin-coating method and placed on glass at 450°C. Atomic force microscopy (AFM) revealed coarse, textured surfaces with BaO crystallites ranging from 1.4 to 150 nm in size, depending on the Cd concentration. Optical properties were investigated using UV–visible spectroscopy, revealing high transparency and direct bandgap energies between 3.467 and 3.728 eV. Defects were studied using Doppler broadening spectroscopy (DBS), which showed that there were different types of defects linked to oxygen and barium. A correlation was observed between the S parameter of DBS, crystallite size, and optical bandgap. Additionally, positron annihilation lifetime spectroscopy (PALS) was used to study vacancy-type defects and verify the positron lifetimes connected to the S parameter. The results demonstrate that Cd doping significantly influences the microstructure, defect landscape, and optoelectronic properties of BaO thin films.Öğe Türü: Öğe , 3D Bioprinting Scaffold of Gelatine Reinforced-Zinc Nanoparticles Synthesized by Green Synthesis: Comparative Evaluation of Mechanical and Thermal Properties(Elsevier, 2026) Yücer, Şeydanur; Saraç, Begüm; Karaduman, Emre; Erarslan, Azime; Çiftçi, FatihThe development of sustainable, biocompatible, and mechanically robust biomaterials is essential for nextgeneration biomedical applications. In this study, zinc oxide nanoparticles (ZnONPs) were synthesized using a green, gelatin-mediated approach and incorporated into gelatin-based bioinks to fabricate 3D-bioprinted composite scaffolds. Structural analyses confirmed the successful formation of crystalline ZnONPs and their uniform dispersion within the gelatin matrix. Mechanical testing demonstrated a clear concentration-dependent enhancement, with Young’s modulus, tensile strength, and toughness increasing up to 67%, 67%, and 110%, respectively, in Gel–ZnONPs(5) compared to pristine gelatin. Antibacterial assays revealed strong inhibition against S. aureus and Escherichia coli, with zones reaching 23.1 mm and 20.2 mm, approaching the efficacy of Gentamicin. Cytocompatibility remained high across all tested concentrations, with cell viability consistently exceeding 85%, fulfilling ISO 10,993–5 non-cytotoxicity criteria. The 3D bioprinting process yielded structurally stable scaffolds with precise geometry, demonstrating the synergistic advantages of combining green nanoparticle synthesis with additive manufacturing. Overall, the results highlight Gel–ZnONPs composites as promising candidates for tissue engineering, wound management, and antimicrobial biomedical devices, offering a sustainable strategy to enhance functionality, mechanical integrity, and biological performance in biofabricated materials.Öğe Türü: Öğe , Seismic Performance and Risk Assessment of Industrial Structures during the 2023 Türkiye Earthquakes(WCEE2024, 2024) Öztürk, Sezer; Altınsu, Elif; Güneş, Oğuz; Sarı, AliIn the 2023 Kahramanmaras earthquake sequence, various types of damage occurred in a large number of different types of structures. Industrial structures are also among the structural types affected by this disaster. After this devastating earthquake, the research team conducted field surveys in provinces such as Hatay and Gaziantep and examined the seismic performance of industrial buildings in addition to ordinary buildings. In this paper, the investigations and the outcomes obtained for storage tanks and grain-like material silos are discussed. In a cylindrical storage tank that is located in a vegetable oil storage facility, liquid sloshing eventuated due to severe shaking, and the tank wall and roof were damaged. It has also been observed in tanks that elephant foot buckling occurred on the wall due to ground motion. The storage tank, which was overturned due to anchorage failure, is another damaged structure encountered during the examinations. The behaviour of these tanks also gives an idea about the behaviour of the tank in which flammable liquids are stored. Studies were also carried out on risk assessment, mitigation, and management for storage tanks with the data obtained. In addition, numerous distinct types of damage were encountered in the silos at the maize storage facility. Some silos were completely overturned, anchorage and wall damage occurred in several silos, and it was deduced that the plant suffered significant economic damage due to the spillage of the stored maize. It has been comprehended that the silo anchors are not designed to withstand possible seismic effects. The causes of the damages are explained by associating them with the seismic data recorded in the region, and the precautions that can be taken against earthquakes that may occur in the future are presented.
