http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/13955 2026-04-23T08:14:24Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/14804 Russia-Ukraine Conflict: A Text Mining Approach through Twitter ELİGÜZEL, İbrahim Miraç The focus of this study is to use social media to investigate the Russia-Ukraine conflict. With the assent of the Russian parliament, Russian President Vladimir Putin proclaimed that they will begin invading Ukraine on February 24, 2022. During the Russia-Ukraine conflict, social media, particularly Twitter, has been heavily used. For that reason, it becomes to strong tool for handling processes during the conflict such as political decision making, organizing humanitarian activities, and proving assistance for victims. As a result, social media becomes the most up-to-date, comprehensive, and large information source for current scenario analysis. A total of 65412 tweets are gathered as a dataset for analysis in the proposed study between February 24 and April 5. Then, for each tweet, a topic modeling method called Latent Dirichlet Allocation (LDA) is used to collect significant topics and their probabilities considering each tweets. Then, using the specified probabilities, Fuzzy c-means is utilized to generate clusters for the entire document. Finally, seven unique clusters have been gathered for processing. N-grams and network analysis are used to examine each resulting cluster for a better understanding. As a result of this study, worldwide public opinion, current situation of civilians, course of the conflict, humanitarian issues during the Russia-Ukraine conflict are extracted. 2023-01-01T00:00:00Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/14803 The Effect of Different Heavy Overhang on Structural Performance in Reinforced Concrete Structures IŞIK, Ercan; AKAT, Fırat There are many structural factors that affect the earthquake performance of buildings. Heavy overhang is one of these factors which are made to increase the storey area on the storeys above the ground storey. Within the scope of this study, the effect of different heavy overhangs on the earthquake performance of the building was investigated, which are commonly used in reinforced-concrete (RC) structures. A sample RC building with no heavy overhangs was chosen as the reference building model for numerical analysis. The numerical analyses were carried out for a total of 16 structural models designed by adding heavy overhangs of different lengths to different facades of the reference building model. The obtained results were compared with the results of the reference structure model without heavy overhang to reveal the heavy overhang effect. The period, base shear force, displacement, and performance levels were obtained for each structural model. It has been determined that the base shear force, period, and total mass increase with the increase of heavy overhangs, while the earthquake performance decreases. The obtained results clearly revealed that the earthquake performance was negatively affected by the increase in the amount of closed heavy overhang. 2023-01-01T00:00:00Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/14802 Nonlinear Seismic Assessment of Historical Masonry Karaz Bridge Under Different Ground Motion Records NEMUTLU, Ömer Faruk; GÜZEL, İhsan; BALUN, Bilal; ÖZTÜRK, Mitat; SARI, Ali The most significant artifacts that transfer the cultural heritage of past civilizations to the present are historical structures. Historical bridges are of great importance in terms of transportation, trade and architecture from past to present. Some of these structures have been destroyed by natural disasters or have suffered significant structural damage. Especially earthquakes cause damage to these structures. In this study, the earthquake behavior of the Historical Karaz Bridge was investigated. The structural elements of the bridge and the materials connecting the bearing elements were evaluated together with the macro modeling approach. For this purpose, a 3D finite element model of the bridge was generated and its seismic behavior under different ground motion records was investigated by nonlinear analysis. Analyzes were carried out using the ground motion records of Bingöl, Elazığ, Erzincan, Van and Gölcük, and the results were evaluated mutually. In the analysis results, the dynamic behavior of the bridge was evaluated over the distribution of displacements and stresses and the earthquake behavior was investigated. 2023-01-01T00:00:00Z http://dspace.beu.edu.tr:8080/xmlui/handle/123456789/14801 The Combined Use of SCD Probiotics and Tauroursodeoksikolik Asit (TUDCA) is More Effective in Controlling Anxiety-Like Behavior in Aged Rats CEYLANİ, Taha; TEKER, Hikmet Taner In this study, the effects of TUDCA administration with a SCD probiotics for one week on locomotors activity and anxious behavior were investigated. Male Saprague-Dawley rats aged 24 months were used as the model organism. At the end of the application, open-field and elevated plus maze behavioral tests were performed on the rats. Although SCD probiotics were more effective on anxious behavior, the group in which they were administered together had a significantly greater effect on locomotor activity and anxious behavior. This study provides important evidence that combining SCD probiotics and TUDCA administration may be more beneficial to behavior. 2023-01-01T00:00:00Z