Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7755

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Author: search.filters.author.Duvarcı, YavuzScopus Q: search.filters.scopusQuartile.N/A

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  • Conference Object
    Citation - WoS: 2
    Citation - Scopus: 2
    Contribution of the Personal Rapid Transit (prt) Systems To the Road Safety: a Scenario-Based Comparative Evaluation
    (Hong Kong Society for Transportation Studies, 2012) Duvarcı, Yavuz; Akpınar, Figen
    Though the number of "real ground" PRT projects are few, it can be possible to deduce some hypothetical safety conclusions. For the very optimist assumption that the control algorithms will only "allow" them to operate in non-collision mode on the network, the safety figures are re-evaluated for two urban settings: First (1) is the case where the urban design was fully recreated based on PRT system. The other (2) is the hypothetical PRT system would be embedded into the existing transportation system. The two cases of the safety measures and cost figures are compared to evaluate the opportunities and pitfalls by the application of a PRT system via the scenario analysis. By doing so, after description of the present situation, there comes the construction of possible alternative futures to compare with the present one. It can be deduced that, even if the safety figures of PRT system are hypothetical, PRT-based urban environments promise a lot in terms of safety levels (as far as 80 per cent) with, however, the expense of financial burden for the local government. Yet, for low-cost solution, PRT-embedded urban environments also provide promising results compared to "doing nothing" as far as 30 per cent reductions, in accidents in total and 44 per cent in deaths.
  • Master Thesis
    The Analysis of the Planning Consequences and Risk of Earthquake in Terms of Urban Rent: the Case Study of Adapazarı
    (Izmir Institute of Technology, 2004) Bektaş, Birkan; Duvarcı, Yavuz
    General aims of the thesis were to understand the nature and causes of earthquake damage in built and social environment, to define and assess urban seismic risk in Turkey and the World, to interrogate planning regulations, policies, and implementations, and to determine the risk factors from social, economic, natural viewpoints. However, the thesis assumed that the increase of the risk as correlated to the raised rent values could be related to planning decisions. The thesis aimed to look closely to planning decisions and their causality on the increase of earthquake risk in terms of urban rent. The study assumes that there are strong relationships among earthquake damage, urban rent and planning decisions. Various risk factors related to earthquake damage were described as natural, social, economic and technical factors.But the scope of the thesis was limited to social risk factors with respect to earthquake damage in order to clarify impact of urban rent and planning decisions.Multiple Regression and correlation analysis was used as a method in order to provide an experimental fundamental and to test claims. In this study, unit of data analysis is defined as scale of district or "mahalle" in Adapazari. Firstly, data such as population density, earthquake damage, the physical building density, and land price (urban rent) in Adapazari was assigned to unit of "mahalle". After analysis in scale of "mahalle" was completed in 26 districts, correlation and regression analysis through variables are conducted in order to enlighten relationships among earthquake damage and urban rent and plan decisions. The study examined that what planning decisions urban rent influence and what their explanatory degree was through regression and correlation analysis. For this step land price or urban rent was analyzed with population density, distance to the city center and ground area ratio through regression and correlation. In the second step earthquake damage was analyzed with independent variables, land value or urban rent, average distance of demolished buildings to the city center and physical building density. Variables coming planning decisions and urban rent and earthquake damage in second step are analyzed through correlation and regression.In the first step, when outcomes of analysis between urban rent (land price) and other variables were assessed, the calculated R square is approximately 52 % and relationships between dependent and independent variables were not strong. In the second step, when analysis between earthquake damage ratio and other variables were assessed, R square is approximately 63% and relationships between dependent and independent variables were not very strong.In conclusion, my assumption related to urban rent and earthquake damage was falsified by correlation and regression analysis. However, it does not mean that there is not any relationship between earthquake damage and land price (urban rent ). The goal of this study was to understand impact of mentioned factors on earthquake damage. The study suggests that future researches related earthquake damage should be focus on natural risk factors and building technology of construction.Key words: natural disaster, urban rent, earthquake damage, planning decisions, conventional planning, risk management and contingency planning, regression and correlation analysis.
  • Doctoral Thesis
    Traffic Accident Predictions Based on Fuzzy Logic Approach for Safer Urban Environments, Case Study: Izmir Metropolitan Area
    (Izmir Institute of Technology, 2009) Selvi, Ömer; Duvarcı, Yavuz
    Dissertation has dealt with one of the most chaotic events of an urban life that is the traffic accidents. This study is a preliminary and an explorative effort to establish an Accident Prediction Model (APM) for road safety in İzmir urban environment. Aim of the dissertation is to prevent or decrease the amount of possible future traffic accidents in İzmir metropolitan region, by the help of the developed APM. Urban traffic accidents have spatial and other external reasons independent from the vehicles or drivers, and these reasons can be predicted by mathematical models. The study deals with the factors of the traffic accidents, which are not based on the human behavior or vehicle characteristics. Therefore the prediction model is established through the following external factors, such as traffic volume, rain status and the geometry of the roads. Fuzzy Logic Modeling (FLM) is applied as a prediction tool in the study. Familiarizing fuzzy logic approach to the planning discipline is the secondary aim of the thesis and contribution to the literature. The conformity of fuzzy logic enables modeling through verbal data and intuitive approach, which is important to achieve uncertainties of planning issues.