http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/15588 2026-04-23T06:52:32Z 2026-04-23T06:52:32Z Kabakuş, Nuriye Eyüboğlu, Merve http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/15633 2025-08-12T08:06:24Z 2024-01-01T00:00:00Z

USING SWARA METHOD FOR EVALUATION OF FACTORS AFFECTING PEDESTRIAN SAFETY AT INTERSECTIONS Kabakuş, Nuriye; Eyüboğlu, Merve Intersections are considered among the most hazardous points in traffic and can pose significant dangers, especially for pedestrians. The primary aim of this study is to investigate factors affecting pedestrian safety at intersections and to develop effective strategies to enhance pedestrian safety. In this context, various factors influencing pedestrian safety at intersections need to be considered. Within the scope of the research, factors such as pedestrian speed, vehicle speed, traffic signs and signals, intersection geometry, signaling systems, road surface, traffic volume, illegal parking, weather and lighting conditions, pedestrians' ages and clothing choices have been identified as key elements affecting pedestrian safety at intersections. These criteria have a wide range of impacts on traffic safety. The SWARA method was used to determine the priority order of these criteria. As a result of this analysis, vehicle speed was identified as the most significant factor, while pedestrian clothing choice was determined to be the least important factor. Based on the analysis of these criteria, appropriate measures can be taken to ensure safe pedestrian crossings. In conclusion, a holistic approach must be adopted to enhance pedestrian safety. This entails considering all factors affecting pedestrian safety at intersections and developing appropriate strategies. This approach can lead to more effective solutions to intersection safety issues and ensure pedestrian safety

2024-01-01T00:00:00Z Audu, Khadeejah James Elisha, Yak Chiben Yahaya, Yusuph Amuda Akande, Sikirulai Abolaji http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/15632 2025-08-12T08:03:41Z 2024-01-01T00:00:00Z

THE PRACTICAL INTEGRATION OF LINEAR ALGEBRA IN GENETICS, CUBIC SPLINE INTERPOLATION, ELECTRIC CIRCUITS AND TRAFFIC FLOW Audu, Khadeejah James; Elisha, Yak Chiben; Yahaya, Yusuph Amuda; Akande, Sikirulai Abolaji A fundamental mathematical field with many applications in science and engineering is linear algebra. This paper investigates the various applications of linear algebra in the fields of traffic flow analysis, electric circuits, cubic spline interpolation, and genetics. This research delves into individual applications while emphasizing cross-disciplinary insights, fostering innovative solutions through the convergence of genetics, cubic spline interpolation, circuits, and traffic flow analysis. The research employs specific methodologies in each application area to demonstrate the practical integration of linear algebra in genetics, cubic spline interpolation, electric circuits, and traffic flow analysis. In genetics, linear algebra techniques are utilized to represent genetic data using matrices, analyze genotype distributions across generations, and identify genotype-phenotype associations. For cubic spline interpolation, linear algebra is employed to construct smooth interpolating curves, involving the derivation of equations for spline functions and the determination of coefficients using boundary conditions and continuity requirements. In electric circuit analysis, linear algebra is crucial for modeling circuit elements, formulating systems of linear equations based on Kirchhoff's laws, and solving for voltage and current distributions in circuits. In traffic flow analysis, linear algebra techniques are used to represent traffic movement in networks, formulate systems of linear equations representing traffic flow dynamics, and solve for traffic flow solutions to optimize transportation networks. By addressing contemporary challenges, emerging research frontiers, and future trajectories at the intersection of linear algebra and diverse domains, this study underscores the profound impact of mathematical tools in advancing understanding and resolving complex real-world problems across multiple fields.

2024-01-01T00:00:00Z Mosa, Hiba Mustafa Yousef Dogan, Meltem Cetinyokus, Saliha http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/15631 2025-08-12T07:59:38Z 2024-01-01T00:00:00Z

SYNTHESIS AND CHARACTERIZATION OF CHROMIUM-BASED CATALYSTS ON TITANIUM-MODIFIED-MCM-41 FOR OXIDATIVE DEHYDROGENATION OF ISOBUTANE Mosa, Hiba Mustafa Yousef; Dogan, Meltem; Cetinyokus, Saliha This study aimed to prepare chromium-based catalysts on titanium-modified MCM-41 for oxidative dehydrogenation reactions. MCM-41 was synthesized hydrothermally. In order to increase the hydrothermal stability of support, titanium was added to the MCM41. The titanium source (K2TiF6) was dissolved in two different solvents (hot water and sulfuric acid). The hydrothermal stability test was performed with the samples. The samples were characterized by XRD, N2 adsorption/desorption, FT-IR, and SEM/EDS analysis. When titanium was added to the MCM-41 structure, it was determined that the pore walls thickened, and the main peak characterizing the hexagonal structure was preserved. With the modification, the average pore diameter of MCM-41 decreased from 28Å to 22Å, and the surface area decreased from 1250 m2/g to 500 m2/g. The hydrothermal stability test indicated that the loading of titanium improved the stability of MCM-41. FT-IR results showed that titanium has formed strong bonds with oxygen atoms, creating Si-O-Ti, Ti-OH, and Ti-O bonds. These bonds enhanced to stabilize the MCM-41 structure, making it more resistant to structural changes. Smaller crystal size (178Å) and higher surface area (554 m2/g) were determined in the support prepared by dissolving the titanium source in hot water. Therefore, this support was used in catalyst synthesis. Chromium-based catalysts on titanium-modified MCM-41 were prepared by wet impregnation method at different chromium loading (3% and 10%, by mass). The presence of the anatase phase of TiO2 and inactive α-Cr2O3 in the high chromium-loaded sample was determined. Therefore, catalytic tests were carried out with a catalyst containing 3% chromium by mass, prepared using a Timodified support, as well as a catalyst prepared using an unmodified support. The highest isobutane conversion (94%) and isobutene selectivity (81%) values were obtained for catalyst supported on Timodified MCM-41. High activity predicted for catalyst supported on modified MCM-41 was explained by improving hydrophilic properties

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