Phd Degree / Doktora

Permanent URI for this collectionhttps://hdl.handle.net/11147/2869

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2011 - 20166

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Department: search.filters.department.Thesis (Doctoral)--İzmir Institute of Technology, ArchitecturePublisher: search.filters.publisher.İzmir Institute of Technology

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Now showing 1 - 6 of 6
  • Doctoral Thesis
    Non-Visual Aspects of Spatial Knowledge: Wayfinding Behavior of Visually Impaired People in Complex Urban Environments
    (İzmir Institute of Technology, 2016) Kan Kılıç, Didem; Doğan, Fehmi
    Everybody perceive space multi-dimensionally however blind people are more conscientious of the non-visual constituents of space. Although there is an extensive amount of research on mobility, perception, and way-finding of blind people, there has been fewer work to show which specific aspects of built environment they focus on and they use as cues in the way they relate to their urban environment. Therefore, this study focuses on the senses of blind individuals during their way-finding process in urban contexts. Two case studies in İzmir, Turkey and Lisbon, Portugal were conducted in large-scale urban contexts. The case study in İzmir highlights the holistic and multi-dimensional perception of space by asking 9 congenitally blind participants to mark those places that they find particularly important in Kemeralti and İzmir Fair Park by verbally describing the features in the environment they attend to. It was found that auditory information was the most used environmental cues and a feeling of enclosure is the most important environmental feature during way-finding. The second case study in Lisbon was conducted with 5 congenitally blind participants to understand the strategies of congenitally blind participants with a focus on whether sounds from the environment are of primary importance for blind individuals. The most important finding is that increased familiarity with the environment, the better way-finding strategies blind individuals have. This study highlights multi-dimensional sensory experience of urban environments and non-visual aspects of spatial perception.
  • Doctoral Thesis
    Exploring House Price Dynamics: an Agent-Based Simulation With Behavioral Heterogeneity
    (İzmir Institute of Technology, 2016) Özbakan, Ahmet Tolga; Kale, Serdar
    In contemporary capitalist economies, housing is not only a shelter that satisfies a basic human need. It is also a commodity produced for exchange in markets and an asset for storing and enhancing wealth. As such, its mispricing can have repercussions for individuals, firms, industries, nationwide economies, and for the global economy. The purpose of this dissertation is to explore the price dynamics of this complex entity in an analytically tractable framework. In agreement with a recent but growing body of literature, the study shares the view that incorporating insights from behavioral economics can be valuable in such an undertaking. To support this statement, the dissertation first presents a theoretical framework that situates differing views on house prices in a wider split between neoclassical and behavioral economists. Then, the study proposes an agent-based simulation by extending a prominent real estate market model known as the Four Quadrant Model. Specifically, the extended model seeks to explore the extent to which behavioral heterogeneity and dynamic market behavior enhance the existing explanations of house price dynamics. The dissertation validates the proposed model by running a set of experiments with empirical data obtained from Istanbul’s housing market between January 2010 and September 2015. The results suggest that both the inclusion of behavioral heterogeneity and dynamic behavior are relevant in the exploration of house price dynamics. Based on the theoretical framework and the simulation results, the dissertation calls for action on the part of policy makers, researchers, and members of civic and professional organizations.
  • Doctoral Thesis
    Experimental and Numerical Analysis of Flow and Heat Transfer in Double Skin Facade Cavities
    (İzmir Institute of Technology, 2016) İnan, Tuğba; Başaran, Tahsin
    In this study, airflow and heat transfer in a double skin facade (DSF) cavity were examined numerically and experimentally under natural and forced flow conditions. An experimental setup was constructed i the laboratory environment. Experiments were performed for two different DSF's airflow modes; buffer zone and external air channel. These experiments vere conducted with and without a solarsimulator integratrd t the system. Furthermore, the effect of pressure drop elements in the cavity of DSF were analyzed experimentally. After the numerical results (CFD and nodal network) were verified with experimental measurements, dimensionless heat transfer correlations were developed for the natural and forced convections. As a result, an extensive experimental data set was obtained for different working conditions of DSF. So, the dimensionless pressure loss coefficients were calculated experimentally based on the geometric configuration of the pressure drop elements in the cavity. In natural convection, with Rayleigh numbers ranging from 8.59*109 to 1.41*1010 and the increasing tendency of the average Nusselt numbers from 142.6 to 168.8 were shown. A correlation for a cavity characteristic length of 0.116 was constructed to evaluate the heat flux. In forced convection, another dimensionless correlations weredeveloped to predict the heat transfer by using. Nusselt numbers with in the Reynolds numbers ranging from 28000 to 56000 for a DSF with an external airflow mode. These correlations could be used for different characteristic length ranged betwen 0.1 and 0.16. These correlations were used for the energy performence of DSF applications for different directions and climatic zones in Turkey and compared with the single skin facede.
  • Doctoral Thesis
    Development of a Database for the Restitution Phases of Kurşunlu Khan in Manisa
    (İzmir Institute of Technology, 2016) Saygı, Gamze; Turan, Mine
    Historic buildings are not constant assets, they are representations of mankind and cultural systems throughout the time. In such a context, it is important to enlighten the process of building’s evolution by means of restitution(s), i.e., descriptions of different (re)compositions of buildings for different historical states. Hence, restitutions are used as works of synthesis in architectural conservation, and it is a mandatory part for it. On the other hand, representation of information beyond geometric, spatial and physical characteristics of a historic building carries a crucial importance for a holistic understanding of changes in those restitutions. This requirement is a multi-fold manner consisting of representation, archival, assessment and management aspects. Regarding those aspects, databases offer promising possibilities. Nevertheless, covering the requirement of the restitution state(s) is yet quite challenging if also visualization in digital three dimensional (3D) platform is considered, which is the most desirable way since it offers users an unrestricted and holistic visualization. Accordingly, this thesis proposes a methodology for the development of a database for the restitution states of a historical monument covering not only geometric and spatial aspects, but also historical resources. The thesis has a motivation to make sharing of restitution information, and decreasing future investigation effort in order to reach information of different historic periods. In this frame, Kurşunlu Khan in Manisa, Turkey, a typical building type of Ottoman architecture (şehiriçi hanı), dating back to 15th century, is selected for testing the methodology. The principles for collection and analysis of the data regarding the case study, structuring the database, and its visualization and access possibilities are defined. The thesis concludes that database may be an efficient tool supporting both the planning of a restoration project, and archiving of comprehensive results for later interventions and research. The resulting visualization options through the database and semantically enriched 3D model effort to make an easier understanding of historic changes specific to the monument. The database is open for improvement with conservation-aimed information.
  • Doctoral Thesis
    Categorization of Manual Lighting Control Behavior Patterns Based on Interior Layout in Offices
    (İzmir Institute of Technology, 2016) Cılasun Kunduracı, Arzu; Kazanasmaz, Zehra Tuğçe
    To reduce energy consumption due to lighting, variety of methods such as energy efficient products, daylight and lighting control systems, simulation softwares are being used. However, these methods may fall short of their potential if the end user, occupants, are not taken into consideration. Energy consumption due to lighting can be reduced further by understanding building occupants’ needs and behaviors. In this study, to understand user behavior for lighting, manual lighting control of occupants were examined. This examination compromises physical, temporal and architectural factors which affect manual lighting control behavior. Especially the focus was on interior layout to observe the relation between the architectural parameters and manual lighting control behavior. The goal of the research and experiments of this dissertation was to obtain realistic manual lighting control data in offices. First of all, various parameters including physical, visual, occupancy and architectural were observed and statistically analyzed by the conducted questionnaire, to find the most triggering/inhibiting factors for manual lighting control. Secondly three private offices were equipped to monitor the change in manual lighting control behavior with regards to occupancy, daylight penetration and interior layout. Results used to generate from the fuzzy model which offers more detailed classifications on manual lighting control probabilities. Gathered results showed that interior layout has a significant contribution to manual lighting control. As a result, if architects/lighting designers/researchers utilize the provided classifications of the tested parameters on the future studies, they can reduce energy consumption while increasing user satisfaction.
  • Doctoral Thesis
    Effect of Urban Geometry on Pedestrian Level Wind Velocity
    (İzmir Institute of Technology, 2011) Çelik, Çelen Ayşe; Yücel, Şebnem
    In the recent years there are many studies on the detection of the Urban Heat Island (UHI) Effect which shows itself mostly by the temperature difference between rural and urban areas. The heat generation in the city, the radiant energy balance, the air flow direction and intensity are the main factors affecting the UHI. Height and shape of the buildings, the street width and orientation, the space between the buildings and the urban topography and vegetation are the main elements of the urban geometry. The air velocity is either increased or decreased by building blocks and the solar energy is trapped in the urban canyons formed by buildings on both sides of the streets. Pedestrian comfort level is greatly affected by the temperature, the relative humidity and the wind speed in urban canyons. The city of Izmir has been experiencing very hot summers especially in the recent years due to the UHI effect and the global warming. The compact organization of the streets in the mild climate of Izmir during the winter protects pedestrians and building façades from cold winds. However the prevailing wind and the local breeze in the summer season on the coastal region in Izmir are blocked by the buildings as well, causing discomfort during the hot summer days. Although this is a well known problem in Izmir, there are very few scientific studies on the subject to bring it above a speculative level. The aim of this study is to fill this gap as much as possible and find a way to create guidelines for planners and architects for future plans or physical organisation of the city and making strategies for better urban environment and comfort conditions for the citizens of Izmir.