TR-Dizin İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12573/396
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Article Citation - Scopus: 25Lyapunov Exponent Enhancement in Chaotic Maps With Uniform Distribution Modulo One Transformation(Akif AKGUL, 2022-03-30) Ablay, GünyazMost of the chaotic maps are not suitable for chaos-based cryptosystems due to their narrow chaotic parameter range and lacking of strong unpredictability. This work presents a nonlinear transformation approach for Lyapunov exponent enhancement and robust chaotification in discrete-time chaotic systems for generating highly independent and uniformly distributed random chaotic sequences. The outcome of the new chaotic systems can directly be used in random number and random bit generators without any post-processing algorithms for various information technology applications. The proposed Lyapunov exponent enhancement based chaotic maps are analyzed with Lyapunov exponents, bifurcation diagrams, entropy, correlation and some other statistical tests. The results show that excellent random features can be accomplished even with one-dimensional chaotic maps with the proposed approach. © 2023 Elsevier B.V., All rights reserved.Article Citation - Scopus: 2Investigation of Peroxidase-Like Activity of Flower-Shaped Nanobiocatalyst From Viburnum Opulus L. Extract on the Polymerization Reactions(Turkish Chemical Society, 2024-08-30) Kalayci, Berkant; Kaplan, Naime; Mirioglu, Muge; Dadi, Seyma; Öçsoy, Ismail; Göktürk, ErsenHere, we report the effects of peroxidase-mimicking activity of flower shaped hybrid nanobiocatalyst obtained from Viburnum-Opulus L. (Gilaburu) extract and Cu2+ ions on the polymerization of phenol and its derivatives (guaiacol and salicylic acid). The obtained nanoflowers exhibited quite high catalytic activity upon the polymerization of phenol and guaiacol. The yields and the number average molecular weights of the obtained polymers were significantly high. Due to solubility issue of salicylic acid in aqueous media, polymerization of salicylic acid resulted in very low yields. Free-horseradish peroxidase (HRP) enzyme is known to be losing its catalytic activity at 60 °C and above temperatures. However, the synthesized nanoflowers exhibited quite high catalytic activity even at 60 °C and above reaction temperatures. This provides notable benefits for reactions needed at high temperatures, and it is very important to use these kinds of nanobiocatalysts for both scientific studies and industrial applications. © 2024 Elsevier B.V., All rights reserved.Article An Evaluation of the Rural Landscapes as Heritage From Habitus Perspective(Geleneksel Yayincilik Ltd Stl, 2024-03-19) Elagoz Timur, Bahar; Asiliskender, Burak; Timur, Bahar ElagözRural heritage areas consist of natural and built environments produced concerning local and traditional life practices, production -consumption habits, and intangible values of societies. This environment is created vernacularly using local materials and construction techniques due to the topographical features where it is built and is in contact with local users. For this reason, it is valuable to explain the meaning of vernacular architecture to understand its users and the habitus that emerges from it. Historical rural settlements, which have found their place in conservation theories over time, attract attention with their traditional and vernacular architecture.These areas, called "rural landscape as heritage" by definition developed by ICOMOS-IFLA, are accepted as a whole with their tangible and intangible components such as natural, archaeological, and architectural. Today, plenty of research is about integrated conservation issues of rural landscape heritages. The study, differently from theirs, plans to discuss the rural landscapes through habitus. It is possible to interpret the vernacular architecture produced in rural landscapes by understanding its user and the habitus in which it emerges. Moreover, there is a dynamic link between the traditional rural areas and the habitus of societies that produce and are produced by their daily lifestyles, traditions, collective memories, and histories. The habitus, which is always transformed, begins to adapt its environment to the change by this link. In this changing process, effects such as industrialization, technological developments, and globalization threaten rural landscapes to lose their authentic values. The first step in the conservation of rural landscapes lies in understanding these areas and their values and making change predictable. From this point of view, this study questions the role of habitus in the formation and life cycle of rural heritage. The research and the hypothesis created aim to contribute to the studies about sustainable living in rural landscapes by revealing the structuring effect of the habitus between the rural landscapes and their natural, built, and socio-cultural environments. In the study, the method developed from the literature to understand rural landscapes and their dynamics without studying the case is presented for use in rural landscape heritage conservation studies. Habitus connects the natural, tangible, and intangible components of rural landscapes by the balance it creates and contributes to the formation and maintenance of the spirit of place. In order to understand this balance and draw attention to holistic conservation approaches, the network of relations has been tried to be revealed in detail. Within the scope of the study, the definition of habitus was explained through the environment and practices, and its relationship with the rural landscape was conveyed through a single structure and settlement. The transition of living heritage is inevitable, but when it cannot be managed according to international regulations, the consequences will be the loss of rural heritage, which represents societies' traditional lifestyles. The proposed approach needs to be customized and re-established for each different rural landscape heritage site. Because each heritage site is unique and has its own conservation problems. It is critical to raise awareness about the effects of habitus change in rural landscapes and their management and to emphasize the importance of creating resilient rural heritage areas that can accompany change by preserving authentic values.Article Citation - Scopus: 6A Comparative Study to Estimate the Mode I Fracture Toughness of Rocks Using Several Soft Computing Techniques(Murat Yakar, 2023-10-05) Köken, E.; Kadakci Koca, Tümay; Koca, Tümay KadakciFracture toughness is an important phenomenon to reveal the actual strength of fractured rock materials. It is, therefore, crucial to use the fracture toughness models principally for simulating the performance of fractured rock medium. In this study, the mode-I fracture toughness (KIC) was investigated using several soft computing techniques. For this purpose, an extensive literature survey was carried out to obtain a comprehensive database that includes simple and widely used mechanical rock parameters such as uniaxial compressive strength (UCS) and Brazilian tensile strength (BTS). Several soft computing techniques such as artificial neural network (ANN), adaptive neuro-fuzzy inference system (ANFIS), gene expression programming (GEP), and multivariate adaptive regression spline (MARS) were attempted to reveal the availability of these methods to estimate the KIC. Among these techniques, it was determined that ANN presents the best prediction capability. The correlation of determination value (R2) for the proposed ANN model is 0.90, showing its relative success. In this manner, the present study can be declared a case study, indicating the applicability of several soft computing techniques for the evaluation of KIC. However, the number of samples for different rock types should be increased to improve the established predictive models in future studies. © 2023 Elsevier B.V., All rights reserved.Article Citation - WoS: 1Citation - Scopus: 5Understanding Intangible Aspects of Cultural Landscape; Living Cultures of Northeast Kayseri Valleys(Geleneksel Yayincilik Ltd Stl, 2021) Kevseroglu, Oztem; Ayatac, Hatice; Yoney, Nilufer Baturayoglu; Baturayoğlu Yöney, NilüferSustaining cultural landscapes requires the conservation of socio-cultural characteristics as well as their physical manifestations. It is essential to document and conserve tangible and intangible elements of heritage in an integrated manner as cultural heritage consists of "both tangible and intangible works through which the creativity of a people finds expressions". These include but may not be limited to social practices, daily lives, rituals, traditional craftsmanship, know-how, techniques and skills, historic places, buildings, public spaces and objects. Finding the means of understanding and safeguarding intangible cultural heritage and its transmission to next generations is vital for the preservation of tangible heritage and its characteristics. This paper reviews the development of the concepts of intangible cultural heritage and cultural landscapes, and the interrelationship between tangible and intangible cultural heritage. Their interaction opens up new approaches to cultural heritage and its conservation. The case study focuses on the cultural landscape features of Kayseri's Northeast Valleys, Koramaz, Gesi and Derevenk, in terms of their tangible and intangible heritage elements and values. The methodology, therefore, proposes the integrated documentation and analysis of these tangible and intangible cultural heritage characteristics. The area had a multi-cultural, ethnic and religious social structure, which shaped its elements through human-nature interaction. However, demographic changes within the last century transformed daily-life practices. The research is based on in-depth interviews with local residents, analysis of archival sources and documentation of the physical remains in the field. The results highlight the traditional crafts and production techniques as daily-life practices; some of these are still continued at the present while others are not practiced anymore. Those practiced in the recent past are carried to our day through the remembrances and accounts of the elders. The documentation of these practices forms the first step for their revival and sustainability for the future and provide valuable tools for the development of principles and strategies with this purpose. Understanding the physical, natural and socio+ layers of tangible and intangible cultural heritage is essential in this context. Their promotion and the inclusion of local stakeholders in the conservation process is the only solution for the integrated conservation of these cultural landscapes in terms of a living heritage approach.