This thesis evaluates the Keklik Street and its Surrounding Conservation and Development Project with respect to sustainability principle of Cultural Heritage Management. The achievements and deficiencies of the Project will be discussed and a performance measurement of the physical, functional and organizational sustainability will be done. Finally, the thesis will emphasize the contribution of the sustainability principle of the management approach and its instruments to the heritage conservation process.

Considering revitalization as a way of improving three interrelated aspects of quality of life including physical quality, social and economic welfare, this study sets out an evaluation framework to measure the success of implementations aiming to revitalize historic commercial places. This framework emerges from the qualities of built environments which are defined with reference to the normative urban design theory developed by Kevin Lynch. Urban qualities are defined with a comprehensive approach which takes into account spatial, social, and economic aspects of creating urban places. The Main Street Program, subject of this study, is a historic commercial district revitalization program developed by the National Trust for Historic Preservation in the United States. This program introduces a preservation-based revitalization model. Based on a comprehensive approach, the program suggests working simultaneously on organization, design, economic restructuring, and promotion. This study analyzes the revitalization model of the Main Street Program by looking at its various aspects including organization models, funding tools, involvement of local communities, contributions of the federal and local governments, implementation, and self-evaluation. Besides, it introduces a citywide coordinating program, Boston Main Streets. Finally, it analyzes the revitalization of Washington Street in South End, Boston, one of the places where Main Street Program has been implemented. The street has been transformed from a vacant and deteriorated commercial street into a more vital, pedestrian oriented, mixed use place in a decade. This study aims to analyze the case from three different points. First, the success of the program is evaluated within the above framework. Second, the effectiveness of the program is examined through an outcome analysis. Finally, the organizational performance of the Main Street organization is analyzed.

A multi-layered analysis on the morphological development of Ephesus in relation to the Temple of Artemis and an investigative wandering through the streets of this city in the era of Roman Empire highlights this thesis characterized by a consistent search for the significance of the notion of urban armature. From the standpoint of those who lived at that time, special attention is directed toward the colonnaded avenues as well as to their formal and social impacts within the city fabric. The thesis re-reads Ephesus within two main parts / first the urban form in relation to the topographical provision and sacred landscape provided by the site itself / and then from the ground level through a walking trip of the city as it appeared in the second century A.D. Crucial to this visual experience is the semantic quality of the environment at a collective level since the meaning of the experience would be useless without considering the meaning of signs and symbols within the environment. Thus, bounding ancient society and urban space at the phenomenological level, the small trip starts at the harbor and concludes at the Temple of Artemis, the irrefutable symbol of Ephesus and the most revered shrine in Asia Minor.

Car dependency which corresponds to excessive and inappropriate usage of the car itself is becoming a major problem all around the world. It shapes urban areas in such a way that the overall urban form as well as individual activities all develop to accommodate cars. However, introducing nonmotorized modes is seen as a remedy to overcome the car dependency. It offers a chance for retrieving healthy urban environments and healthy social lives and also for revitalizing/enhancing public spaces in cities. This means increasing the quality and quantity of pedestrian areas which have been receiving increasing emphasis all around the world. In this thesis, it is intended to show that pedestrianization can be, and should be, a valid transport policy in growing metropolitan areas that are becoming more and more car-oriented, such as Ankara. As a case study, this study assesses potentials and possibilities for creating a pedestrian environment in Ankara, Tunali Hilmi Street. To do so, detailed pedestrian surveys/analyses including v pedestrian counts, pedestrian movement analysis, pedestrian static analysis and pedestrian space analysis throughout the street and questionnaires with potential stakeholders including pedestrians, shop-owners and taxi-drivers are carried out. Through these analyses, it is assessed whether Tunali Hilmi Street is suitable for such an arrangement in terms of pedestrianization or not. As a result, this thesis makes an emphasis on non-motorization and pedestrianization as a method of preventing increasing car-oriented arrangements and revitalizing city centre for the case of Tunali Hilmi Street.

In Turkey, one of the main problems of architecture and urban design seem to be the rapid transformation of physical environments, street experiences, and consequently the transformation of collective memory. One consequence of this basic problem can be the loss of the meaning of urban space. This calls for an historical examination of salient features of urban space that compose the collective memory. In this respect, this thesis aims to explore the changing physical characteristics of the boulevards through examining the transformation of collective memory. To provide empirical evidence for this, the thesis will study the transformation of collective memory of inhabitants from different age groups about the Atat&uuml / rk Boulevard, by exploring the changing salient features of urban space and human experiences in space through a period of the last 60 years.

In this study, the socio-spatial formation of a public place in Ankara, the capital city of the Turkish Republic, is analyzed between the 1950s and the 1980s. Within this framework, the focus of analysis is the Tunali Hilmi Avenue (earlier &Ouml / zdemir Street) as one of the main streets in Ankara. To understand experiences of daily life in relation to spatial constitution of a public place is vital for this study, because this opens the way for discussing the formation of a &ldquo / street&rdquo / as a public place where social forms and practices come into being in the city. Focusing on the socio-spatial experiences of people on a street as a public place, this study uses visual and written documents about the architectural and planning processes, as well as the information gathered from oral history survey about the experiences of individuals, in order to understand how public life and public place are shaped in a reciprocal manner, and how the spatial formation of a street is realized in relation to daily experiences of its inhabitants. The decades from the foundation of the Turkish Republic until the late-1950s are initially presented as the period when this part of the city transformed from a suburb of vineyards into a residential area. The main period of analysis in this study is from the late 1950s to the late 1980s when the Tunali Hilmi Avenue was formed as a significant public place in Ankara, acquiring residential as well as cultural, recreational and commercial functions to act as an urban sub-center in the city. Aiming to produce a comprehensive architectural history of the socio-spatial formation of the Tunali Hilmi Avenue as a public place, with reference to its public role in a specific period of time, this study examines this process as associated with the contemporary changes in the built environment and daily life of Ankara. From such a broad perspective, the study evaluates the unplanned formation of the Avenue as an urban sub-center not only as an urban or architectural entity but also as a social process.

As part of an urban analysis of Tehran, the major question is how and to what extent an urban space (Valiasr Street and its surroundings) manifests urban developments in each epoch in its processes of production. Considering Valiasr Street as the urban backbone of the city, according to its extension and qualities of its surroundings, and by looking at the urban forms regarding this extension, this study will explore the nature of urban transformation under political circumstances and understand each period

Abstract This study investigated the optimal operating parameters on road dust removal by a flusher. It aimed at enhancing road flushing efficiency, analyzing particle size range, and establishing a flushing model. This study explored main roads by collecting road dusts in Kaohsiung metropolitan area in October 2001. The roads were classified by road dust loading (RDL) as follows: level A (minor, RDL<1g/m2), level B (normal, RDL=1~5g/m2), level C (abnormal, RDL=5~11g/m2), and level D (serious, RDL= 11~25g/m2). The frequency of road flushing was recommended as follows: Level D roads were flushed every day to maintain RDL≤20g/m2. Level C roads were flushed every day, while level B roads were flushed every two days, to keep RDL≤10g/m2. Level A roads were flushed every week to maintain RDL≤5g/m2. A pilot-scale road-flush testing field was designed for this particular study to investigate the influence of operating parameters on road flushing efficiency. The findings indicated that flat-fan type nozzle demonstrated higher flushing efficiency than hollow-cone type nozzle, and that the flushing speed and the distance of the nozzle away from the ground were correlated negatively with the road flushing efficiency, whereas the pressure of nozzle and RDL was correlated with the road flushing efficiency. The results suggested that, in the condition of eighty percent of flushing efficiency, the optimal operating parameters were flushing speed of 15km/hr, the pressure of nozzle of 2.0kg/cm2, the distance away from the ground of 30cm, the angle of 40o, and the particle size less than 150£gm. The results showed that particle size was correlated negatively with the road flushing efficiency under various operating parameters of flushing for different road levels. Beside, the road flushing efficiency was above 80% for silt with particle size less than 75£gm. However, for particle size larger than 850£gm, the road flushing efficiency was up to 40%. It concluded that the road flushing efficiency of fine particles was better than that of coarse particles. After conducting dimensionless analysis and multiple regression analysis, the model of road flushing efficiency can be shown as follows, ¡]R¡×0.8276¡^ where £b is the road flushing efficiency, U is the flusher speed (m/s), P is the water injecting pressure (N/m2), W is the road dust loading (kg/cm2), H is the distance of nozzle away from the ground (m), q is the amount of water per square meter (m3/m2), and £c is the angle of nozzle spread. In this model, RDL is negatively correlated with U, W and H. Moreover, the road flushing efficiency increases with water injection pressure and flow rate. On the basis of the above model, the average percentage of error was approximately 0.28%. In this study, the optimal operating parameters of a flusher were that the flushing speed of 10km/hr, water injecting pressure of 2.0kg/cm2, the distance of nozzle away from the ground of 20cm, and the water injecting angle of 45o. However, depending upon the road cleanness levels, the optimal operating parameters could be varied. For instance, the distance of the nozzle away from the ground should be increased up to 30cm in order to prevent the damage from uneven roads or cavities. The experiments showed that 30cm of the height was a better option due to the road flushing efficiency was only 2% lower while compared with that of 20cm. After the analysis of experimental data, the results can serve as the operation condition for road flushing practice as authorities concerned. The operating parameters proposed in this study could be useful for basic design of a high-efficiency flusher. Moreover, the model of road flushing efficiency can be further applied to predict the road flushing efficiency.

The relationship between urban design and economic activity is seldom studied through empirical studies with a large number of cases due, in part, to the implicit and intangible nature of design. This study was intended to understand, analyze, and evaluate the complex relationship between the design and the economic revitalization of downtown districts with reference to the 78 active Texas Main Street Program districts. First, the design, promotion, organization, and economic restructuring components of the Main Street Program's comprehensive four-point approach were investigated. Next, the economic changes that occurred within those districts were analyzed from 1997-2001. Finally, employment, the number of jobs, the number of business establishments, the number of sales tax permits, the retail sales volume, and the commercial property values were compared for the same time period among three categories of cities: those active in the Main Street Program, those formerly active but now inactive, and those who have not participated. Findings revealed that several positive changes occurred in design, promotion, organization, and economic restructuring components of the four-point approach within the active Texas Main Street districts. It appears that these changes produced several positive outcomes for the physical, social, and economical environment of the active Main Street districts. Moreover, the findings suggests that these changes in the Main Street districts resulted in an increased economic activity, not only within the Main Street district by generating jobs, or producing private and/or public investment, but also across the Main Street city by creating community wide economic activity in most of the variables that were under investigation. The results indicate that the Texas Main Street Program, part of which is urban design oriented, is having a positive effect on economic activity within the active Main Street districts.

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