Işık Üniversitesi Kurumsal Akademik Bellek
Işık 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 telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Improving the behaviour of sand with ceramic additives for sustainable ground engineering
(Emerald Group Publishing, 2026-04-14) Koçak Dinç, Beste; Dehghanian, Kaveh; Etminan, Ehsan
This study investigates the effectiveness of waste ceramic powder as a sustainable additive for improving the geotechnical behaviour of poorly graded sandy soils. Ceramic waste was mixed with sand at 5%, 10%, and 15% by dry weight, and its influence on density, permeability, and shear strength was evaluated through laboratory testing and numerical modelling. Results indicate a significant improvement in mechanical properties: the internal friction angle increased from 27 degrees for untreated sand to 40.6 degrees at 15% ceramic content, while apparent cohesion increased from 0 to 15.4 kPa. Permeability decreased markedly from 0.115 to 0.0356 m/s due to the micro-filler effect of fine ceramic particles. Maximum dry density increased from 1.553 to 1.904 g/cm & sup3;, indicating improved compaction behaviour. Finite element analyses using PLAXIS 8.6 confirmed the experimental findings, showing reduced static settlement (from 131 to 77 mm) and lower seismic-induced displacements under Kocaeli, Kobe, and Chi-Chi earthquake motions. The results demonstrate that waste ceramic powder is a low-carbon, cost-effective alternative for sandy soil stabilisation, contributing to sustainable ground engineering and circular material reuse.
Automating cyber risk assessment with public LLMs: an expert-validated framework and comparative analysis
(Institute of Electrical and Electronics Engineers Inc., 2026-03-26) Ünal, Nezih Mahmut; Çeliktaş, Barış
Traditional cyber risk assessment methodologies face a critical dilemma: they are either quantitative yet static and context-agnostic (e.g., CVSS), or context-aware yet highly labor-intensive and subjective (e.g., NIST SP 800-30). Consequently, organizations struggle to scale risk assessment to match the pace of evolving threats. This paper presents an automated, context-aware risk assessment framework that leverages the reasoning capabilities of publicly available Large Language Models (LLMs) to operationalize expert knowledge. Rather than positioning the LLM as the final decision-maker, the framework decouples semantic interpretation from risk scoring authority through a transparent, deterministic Dynamic Metric Engine. Unlike complex closed box machine learning models, our approach anchors the AI's reasoning to this expert-validated metric schema, with weights derived using the Rank Order Centroid (ROC) method from a survey of 101 cybersecurity professionals. We evaluated the framework through a comparative study involving 15 diverse real-world vulnerability scenarios (C1-C15) and three supplementary sensitivity stress tests (C16-C18). The validation scenarios were independently assessed by a cohort of ten senior human experts and two state-of-the-art LLM agents (GPT-4o and Gemini 2.0 Flash). The results show that the LLM-driven agents achieve scoring consistency closely aligned with the human median (Pearson r ranging from 0.9390 to 0.9717, Spearman ρ from 0.8472 to 0.9276) against a highly reliable expert baseline (Cronbach's α =0.996), while reducing the assessment cycle time by more than 100× (averaging under 4 seconds per case vs. a human average of 6 minutes). Furthermore, a dedicated context sensitivity analysis (C13-C15) indicates that the framework adapts risk scores based on organizational context (e.g., SME vs. Critical Infrastructure) for identical technical vulnerabilities. Importantly, the system is designed not merely to replicate expert intuition, but to enforce bounded, policy-consistent risk evaluation under predefined governance constraints. Overall, these findings suggest that commercially available LLMs, when constrained by expert-validated metric schemas, can support reproducible, transparent, and real-time risk assessments.
Challenging Europe's memory regime: the far right's narratives on Russia in the shadow of war
(Marmara Üniversitesi, 2026-04-02) Özdemir, Veli
The European Union’s (EU) “never again” rhetoric, rooted in historical memory, entered a crisis with the war in Ukraine; the EU’s vision of unity based on its values and shared historical narrative has been shattered. The research question of this article is how far-right political actors in Europe responded to the EU’s official memory and security narrative toward Russia and how they shaped their alternative historical narratives about Russia. This article aims to reveal the current effects of memory-based security concerns in European politics. In this context, Alternative for Germany (AfD), Rassemblement National (RN), and the Hungarian Civic Alliance (Fidesz) were selected for analysis. Data were collected from the parties’ official websites, parliamentary transcripts, the official social media accounts of political parties and party leaders, the official YouTube channels of party leaders, and published interviews and media statements. The article employs the concept of mnemonic security to analyze how political actors link their historical narratives to the construction of identity and security. Finally, the study’s findings are discussed in relation to the future political implications of mnemonic security.
Bir Macaristan’dan ötekine
(T24, 2026-04-17) Kahraman, Hasan Bülent
Macar seçimlerinden neredeyse bağımsız şekilde ortaya çıkan kritik bir sonuç var: Orban faşizme açık sağ bir siyaset izledi, Magyar’ın sağcılığı da yabana atılacak cinsten değil. Fakat ikisi arasındaki fark, Orban’ın tamamen kural dışına çıkardığı, tamamen tahrip ettiği sağ liberal düzeni şimdi Magyar nispeten ‘klasik’ bir sağ liberal düzene taşıyacak.
İran savaşının sırrı: Jeo-politikten jeo-ekonomik savaşa
(T24, 2026-04-14) Kahraman, Hasan Bülent
Ortada çok ağır hasar görmüş bir Amerikan hegemonyası var. Amerika içi sistemin bu durumu daha fazla taşıması olanaksız. Önce bu durumu aşmak için bütün o MAGA iddiaları içinde çevresine saldıracak. Topun ağzında Küba bulunuyor. İkincisi, şu veya bu şekilde Trump gidecek. Üçüncüsü, Amerika’da, uluslararası sistemi yeniden müzakereci (deliberative) bir anlayışla pekiştirecek ve hegemonyayı bu yöntemle kuracak, NATO’yu yeniden toparlayacak bir düzene geçilecek.
