University of Computer Engineering and Telecommunications

Reinforced concrete structures constitute a fundamental component of modern construction; however, the execution process is highly susceptible to construction errors that may reduce the safety and durability of structural elements. Despite numerous studies addressing failures and degradation mechanisms, there is a lack of methods enabling quantitative, multi-criteria assessment of the significance of individual execution errors. The aim of this article is to identify, evaluate, and prioritize execution errors occurring during the construction of reinforced concrete structures, considering their impact on safety, durability, and repair costs. A hybrid decision-making model combining the fuzzy WINGS and fuzzy TOPSIS methods was developed to enable the assessment of execution errors under uncertainty. The scientific novelty of this study lies in the application of a hybrid fuzzy approach to the evaluation of construction errors in reinforced concrete works, allowing for the simultaneous consideration of criterion importance and the intrinsic ambiguity of expert judgments. Fuzzy WINGS was used to determine the criterion weights, while fuzzy TOPSIS facilitated the development of error rankings. Within the reinforcement-related errors, the most critical were the following: insufficient concrete cover (0.89), non-compliant reinforcement layout (0.82), and reinforcement discontinuity (0.81). Among formwork errors, the highest importance was assigned to exceeding permissible geometric deviations (0.94), while for concreting errors, the most significant were discontinuity of concreting (0.35) and improper technological joints (0.34). The proposed model provides a practical decision support tool for technical supervision, quality management, and risk assessment in reinforced concrete construction. Due to the universal structure of the hybrid fuzzy WINGS–fuzzy TOPSIS methodology itself, the approach may also be adapted in future research to other decision-making problems, should their nature justify the use of fuzzy multi-criteria methods.

The biocompatibility of orthodontic archwires is crucial for ensuring patient safety and the long-term success of orthodontic treatment. This study evaluated the biocompatibility of stainless steel (SS) and nickel-titanium (Ni-Ti) orthodontic archwires, as well as stainless steel metal brackets, before and after the application of a graphene coating. The assessment was based on the materials' effects on a fibroblast cell line and on the development of a foetal chicken egg embryo. Fibroblasts that had been in temporary contact with steel and NiTi archwires after CW-CVD (cold wall chemical vapour deposition) treatment exhibited changes in morphology in the presence of the material. The materials exhibited moderate cytotoxicity. For metal brackets, the treated samples caused stronger cytotoxic changes in the culture. Unlike graphene-coated implants, where cells were found to directly adhere to the surface, the embryonic tissues did not treat the non-graphene-coated implants as an adhesive material. This study suggests that depositing carbon-based coatings, including graphene, on stainless steel archwires may reduce the cytotoxicity of orthodontic components. Using graphene increases adhesion of the implant surface to membrane-derived cells and the embryonic yolk and does not inhibit the further development of the chicken egg embryo.

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In this paper, we propose a novel solution to the problem of insufficient training data in complex image classification tasks. The presented method efficiently recommends new learning samples with the use of contour-based descriptors and Scalable Vocabulary Tree (SVT) technique. The SVT is built from SIFT features and may be used for identification and localization of objects of interest in the analyzed query images. In conditions where the training data set is not large enough, the SVT's classification accuracy is satisfactory and comparable to that achieved by the dedicated CNN network. However, the SVT approach surpasses the classic convnet approaches due to its incremental learning capability. The classification certainty is further increased thanks to contour-based analysis using Point Distance Histogram (PDH) descriptor. At this stage, the PDH representation of the analyzed object is matched with the information stored in the pattern database. This database contains a set of 360 shape outlines for each object that are extracted from its 3D model. This leads to higher classification accuracy of the presented approach.

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Non-Gaussian operations have been studied intensively in recent years due to their ability to increase the secret key rate for certain CV-QKD protocols. However, most previous studies on such protocols are carried out in a single-mode setting, even though in reality any quantum state contains multi-mode components in frequency space. In this work we investigate the use of non-Gaussian operations in a multi-mode CV-QKD system. Our main finding is that, contrary to single-mode CV-QKD systems, in generic multi-mode CV-QKD systems it is possible to use non-Gaussian operations to increase the optimized secret key rate. More specifically, we find that at losses of order 30dB, which represents a distance of order 160km and the effective maximum distance for CV-QKD, the key rate for multi-mode non-Gaussian operations can be orders of magnitude higher than single-mode operations. Our results are important for real-world CV-QKD systems especially those dependent on quantum error correction - a process that requires non-Gaussian effects.

Polarons of PEDOT:PSS contribute to the surface polarization effect in a metal/PEDOT:PSS/metal structure device. The polarons of PEDOT:PSS contribute to surface polarization due to the electron–phonon coupling. Surface polarization as a new driving force can develop the Seebeck effect based on a metal/semi-metal/metal design.

Hukum uyusmazligi; Turk hukuk sistemi icinde kesinlesmis yargi kararlarinin tekrar incelenebilmesine olanak saglamasi ve hak arama ozgurlugunun korunmasi acisindan buyuk oneme sahip bir basvuru yolu olarak; 2247 sayili Kanun’un 24 ve 25. maddelerinde duzenlenmistir. Bu basvuru usulu ile kesinlesmis mahkeme kararlari arasinda olusan celiskinin giderilmesine ve kisilerin haklarina kavusmalarina olanak saglanmistir. Makale kapsaminda, Uyusmazlik Mahkemesi’ne hukum uyusmazliklarinin giderilmesi istemi ile yapilan basvurularda, birbiri ile celiskili her iki mahkeme kararinin da kaldirilmasi ve dava hakkinda esastan yeni bir hukum kurulmasi guncel ornekleri ile birlikte incelenecektir

W artykule podniesiono, iż ważnym argumentem w dyskusji nad przyszłością Polityki Spójności jest efektywne wykorzystanie przez Polskę środków unijnych w ramach dotychczasowych okresów programowania tj. 2004–2006 oraz 2007–2013. Dokonano przedstawienia wyników finansowych i rzeczowych osiągniętych w województwie opolskim w ramach Zintegrowanego Programu Operacyjnego Rozwoju Regionalnego na lata 2007–2013, następnie Regionalnego Programu Operacyjnego Województwa Opolskiego na lata 2007–2013. Udowodniono, iż w ramach obu Programów region odniósł istotne sukcesy, np. w ramach RPO WO 2007–2013 w konkursie o dodatkowe środki z Krajowej Rezerwy Wykonania zajął pierwsze miejsce. Świadczy to o skuteczności regionu w działaniach absorpcyjnych. Takiego typu skuteczność powinna zostać doceniona w ramach systemu wdrażania opartego na efektywności. W artykule podjęto próbę udowodnienia, iż jest to wystarczającym argumentem, aby w przyszłym okresie programowania utrzymane zostały m.in. Polityka Spójności oraz instrument Krajowej Rezerwy Wykonania.