Polen - İTÜ Akademik Açık Arşive Hoş Geldiniz

Polen, İstanbul Teknik Üniversitesi akademik ve idari personeli, öğrencileri 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.

İTÜ Açık Erişim Sistemi, öğretim üyelerimiz ve öğrencilerimizin uluslararası standartlara ve fikri mülkiyet haklarına uygun olarak ürettikleri kitap, makale, tez, ansiklopedi, sanat eseri gibi bilimsel ve sanatsal ürünleri sunmaktadır.

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Açık Ders Kaynakları 30
İTÜ'de verilen bazı derslerin video kayıtlarını içermektedir.
Akademik Çalışmalar 45286
İTÜ'de yapılan akademik çalışmaları içermektedir.
Arşiv Koleksiyonu 603
Çeşitli birimlerde yer alan arşiv koleksiyonunu içermektedir.
Sunumlar 42
Kurum içinde yapılan çeşitli sunumların çıktılarını içermektedir.
Temel Kayıtlar 2825
Master Data

Yeni Eklenenler

Erişim durumu: Sadece Metadata ,
Analyzing Failures In Wind–Solar Hybrid Energy Systems Using a Fuzzy-Based BWM-MARCOS Approach: Challenges and Solutions
(Springer Science and Business Media LLC, 2025-03-12) Veysi Başhan; Melih Yucesan; Hakan Demirel; Muhammet Gul; Gemi Makinaları İşl.Müh.Bölümü; Gemi Makinaları İşl.Müh.Bölümü; Başhan, Veysi; Demirel, Hakan
Abstract The reliability of hybrid renewable energy systems (HRES) depends heavily on the identification and management of potential failure modes. This study employs a fuzzy-based BWM-MARCOS approach to systematically analyze and prioritize failure modes within wind–solar hybrid systems. The model aims to prioritize the failures considering four important risk parameters: (1) severity of the failure on system, staff, and failure, (2) failure occurrence chance, (3) effort and ease of detecting the cause of the failure, and (4) economic impact of the failure. In this context, four key risk indicators were evaluated to rank failures, revealing that SP1 (cell damage), ESS1 (battery degradation), and WT11 (battery fire) are the most critical due to their potential impact on system operations. Sensitivity analysis confirmed the stability of these rankings under varying parameter weights. Additionally, cross-method validation using fuzzy TOPSIS, SAW, and MARCOS demonstrated high correlation coefficients, underscoring the reliability of the results. Tailored mitigation strategies, including advanced diagnostics, durable materials, and robust monitoring systems, are proposed to address these critical failures. While the current methodology applies to various HRES configurations, future research should incorporate real-world operational data and machine learning techniques to enhance predictive capabilities and dynamic risk management.
Erişim durumu: Sadece Metadata ,
Integrating BIM for health and safety in industrial heritage restoration: a case study on gasometer refurbishment
(Springer Science and Business Media LLC, 2025-03-11) Gürcanlı, Gürkan Emre; Hartmann, Timo; Akboğa Kale, Özge; İnşaat Mühendisliği Bölümü; Gürcanlı, Gürkan Emre
The restoration of industrial heritage buildings presents unique challenges, particularly in ensuring structural integrity, safety, and sustainability throughout the process. It is evident that activities such as structural modifications, demolition and retention carry significant risks. The field of building engineering plays a pivotal role in the transformation of aged industrial edifices into functional and sustainable spaces, while simultaneously preserving their historical significance. Nevertheless, the design for safety and health approach has yet to be implemented with regard to the protection of workers and the general public, as part of the broader concept of sustainability. This study explores the integration of Building Information Modelling (BIM) in the refurbishment of the Phoenix-West Gasometer, emphasizing risk mitigation and project efficiency. By utilizing a multi-phase approach, the research incorporates 3D modelling, hazard identification, and 4D project scheduling to enhance decision-making. The study leverages Autodesk Revit, Navisworks, and Tekla Structures to develop a comprehensive model that integrates safety attributes, material assessments, and environmental risk management. The project timeline was structured into distinct phases, including structural reinforcement, soil remediation, prefabrication, and final safety checks. Through case study comparisons with the Oberhausen and Augsburg Gasometers, the research highlights best practices in heritage restoration, such as soil contamination management, prefabrication strategies, and climate control solutions. The findings demonstrate that BIM-driven restoration can enhance safety compliance, reduce construction risks, and improve project efficiency. This study contributes to the growing body of knowledge on heritage conservation and digital construction methodologies, offering a structured framework for future industrial restoration projects.
Erişim durumu: Sadece Metadata ,
An automated approach for developing geohazard inventories using news: Integrating NLP, machine learning, and mapping
(Copernicus GmbH, 2025-03-04) Avrasya Yer Bilimleri Enstitüsü; Görüm, Tolga
Erişim durumu: Sadece Metadata ,
Electrospun Composites of Bioactive Glass/Pomegranate Seed Oil/Poly(ε-caprolactone) for Bone Tissue Engineering
(Springer Science and Business Media LLC, 2025-03-04) Aysen Akturk
Abstract The increasing demand for bone tissue implants due to population growth and the need to replace damaged bone has led to the development of novel scaffold systems in bone tissue applications. In this study, poly(ε-caprolactone) (PCL) electrospun nanofiber scaffolds were fabricated using the electrospinning method, incorporating 45S5 bioactive glass (BG) particles—synthesized by the melt quenching method—and pomegranate seed oil (PSO), a natural component known to enhance bone regeneration. For this purpose, the effect of different concentrations of PSO (5, 10, and 15% w/w relative to PCL) was investigated, while the BG content was kept constant at 15% w/w. The scaffolds were further analyzed by scanning electron microscopy (SEM) with energy- dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) analysis, thermogravimetric analysis (TGA), and water contact angle tests, which showed that nanofibers were formed and that PSO was successfully incorporated into the nanofibers. Bioactivity assays were carried out in simulated body fluid for 28 days, and the nanofiber structures were examined using SEM, EDS, and XRD. The nanofiber loaded with BG and PSO at the concentration of 15% w/w showed a higher formation of the hydroxyapatite-like layer compared to the scaffolds containing PSO at concentrations of 5 and 10% w/w. Furthermore, the MTT assay using L929 fibroblast cells demonstrated the cytocompatibility of the developed membranes. These results suggest that the combination of BG and PSO in PCL nanofibers may be useful for improving bone tissue regeneration strategies.
Erişim durumu: Sadece Metadata ,
Enhancing the adhesiveness capacity of tissue adhesives: Exploring the impact of silk fibroin concentration and curing time on the efficacy of corneal adhesives
(Elsevier BV, 2025-03-01) Ayşegül Tanrıverdi; Burçin İzbudak; Samin Dastjerd; Elaheh Zamani; Ayça Bal-Öztürk
The current study delved into developing biocompatible silk fibroin (SF) hydrogel-based adhesives and assessed the effect of various concentrations of SF and the visible light exposure duration during the riboflavin-mediated photo-crosslinking process to promote the in vitro/ex vivo performance of them as an ocular tissue adhesive. To accomplish this purpose, the SF solution with high adhesion features that was extracted from silk cocoons underwent exposure for durations of 1, 2, and 4 min, with varying SF concentrations (7.5 %, 15 %, and 22.5 % w/ v). The physicochemical properties of the SF adhesives, such as mechanical strength and biological adhesion behaviors, were enhanced by the increase in SF contents and irradiation time that were investigated by the characterizations of the adhesives using various techniques, which was attributed to the high density of dityrosine and beta-sheet crosslinking agents in the adhesive network. Furthermore, the interaction between tyrosine residues in SF and ocular aqueous humor led to the formation of covalent di-tyrosine crosslinking, which improved the performance of the developed corneal adhesives. SF adhesives exhibited nontoxicity behaviors towards human corneal fibroblast cell lines (HCFs), and findings of DAPI/Actin and PrestoBlue assays revealed the readily adhesion and proliferation of HCFs over SF adhesives, which confirmed their biocompatibility and potential for use in corneal tissue engineering applications.