E-ISSN 1309-6915
Volume: 18 Issue: 4
Year: 2023

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Megaron: 18 (4)
Volume: 18  Issue: 4 - 2023
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1.Front Matter

Pages I - V

2.Illuminating fuzziness about Istanbul's urban growth dynamics through the lens of climate change impact with fuzzy modelling
Gamze Kazancı Altınok
doi: 10.14744/megaron.2023.03367  Pages 439 - 452
The fact that taking an action about controlling urban growth to minimize risks and adopt climate change is considerably significant in this century. This study explores the influence of urban growth dynamics on climate change indicators in İstanbul, Türkiye’s largest metropolitan area. Unlike many other studies that primarily focus on individual indicators, this research comprehensively examines the association between urban growth indicators (UGIs) and climate change impacts (CCIs) by defining direct and indirect relations, contributing valuable insights to the literature by considering the main components of urban growth in the context of urban areas. Primarily, the literature was reviewed to release CCIs originated from urban growth and to highlight UGIs. After the study area was chosen as an İstanbul, population rate, economic structure and quality of life (QoL) as three main indicators of urban growth one by one were examined and some values/indexes about UGIs was compared with the İstanbul’s value. Fuzzy Decision Making Technique (FDMT) in MATLAB programme was chosen as a methodology to be applied through main indicators which affect CCI in İstanbul. What the urban growth dynamics have effects on climate change was concluded by FDMT graphs that had been interpreted through five scenarios (the worst, bad, medium, good, the best). The study's results reveal a significant correlation between population, economy, QoL, and CCIs. Specifically, it is proof that a high population rate, low economic wealth, and low QoL are associated with heightened CCIs in İstanbul.

3.The effect of metro stations on housing prices, Istanbul case
Kamil Demircan, Senay Oğuztimur
doi: 10.14744/megaron.2023.84555  Pages 453 - 465
Metro lines are economic elements that impact the land and real estate values of the urban area, besides the time benefit they produce. According to the literature, metro lines increase housing prices in the service area. The aim of this study is to reveal metro stations’ effect on housing prices, based on the examples of two different metro stations in Istanbul. In this context, within the framework of the metro investment, it is aimed to examine the effect of housing typology and urban transportation opportunities on housing prices as a hybrid model. Within the scope of the study, a field study was conducted to determine the effects of metro in two sample stations selected from İstanbul. Accordingly, it has been examined how the housing prices around the Metrokent and Kirazlı stations of the M3-Kirazlı-Başakşehir Olimpiyat Metro line, which was put into operation in 2013, are affected by the metro station. To make this assessment; hedonic price-based regression analysis was applied. This quantitative method is frequently used in determining the factors affecting house prices. A study was conducted on 349 residences whose sales values were examined from the related websites. The findings show that; housing prices in the Metrokent region are strongly affected by the metro station, while housing prices in the Kirazlı region are limitedly affected. In this study, the way real estate prices are affected by the metro station is examined in terms of housing typology and is expected to be a reference for future studies with different criteria.

4.The effect of building height and street width on indoor daylight performance according to the town planning code – office buildings for the case of Istanbul and Adana
Pınar Aydın, Rengin Ünver
doi: 10.14744/megaron.2023.79577  Pages 466 - 482
Due to the concept of sustainability, it has become increasingly important to reduce the energy burden of lighting by promoting the use of natural light. In daylighting design, there are several variables that affect the performance of daylight indoors. “External obstructions,” which is one of the variables that significantly affect daylight penetration into the volume, are often limited by legislation such as the zoning plan/ordinance, etc. of the city/settlement. In this article, non-structural obstructions at different heights and distances were first determined for attached office buildings within the scope of the “Planned Areas Type Zoning Regulation” in force in Türkiye. The daylight performance of these spaces in the attached structures of office spaces of 2-storey (B2), 5-storey (B5), and multistorey buildings in Istanbul and Adana were investigated according to TS EN 17037, considering the four window directions (K – North, D – East, G – South, and B – West), three light transmission factors (0.8, 0.6, and 0.4), and a transparency ratio of 0.3. Among the optimal options identified for the office buildings considered in the study, the most positive situations were identified among those with appropriate daylight and luminance according to the function, according to the criteria of TS EN 17037. For the scenarios without negative daylight criteria, suggestions were made to improve integrated lighting systems where natural and artificial lighting coexist. Thus, the performance of the daylight entering the volume would be determined at the design stage and the energy to be spent on artificial lighting could be reduced.

5.Knowledge map of stakeholder management in construction projects
Seher Ersoy Maraş, Almula Köksal
doi: 10.14744/megaron.2023.81593  Pages 483 - 498
Stakeholders are an important part that can affect the conditions and performance of construction projects or be affected by project conditions and performance. Stakeholder support plays a crucial role in the success of construction projects. Understanding and meeting stakeholders' expectations and goals can only be achieved through stakeholder management, which also involves organizing and managing their internal relationships. This study provides a comprehensive understanding of the development of stakeholder management in a global context by using bibliometric analysis. The study aims to explore stakeholder management's role within the broader concept of project management and its relationship with other management concepts within different time periods. Bibliometric analysis will be used to create a knowledge map in the field of stakeholder management. Data was collected from the Scopus and Web of Science databases and analyzed using the "VOSviewer" software. The output is utilized to develop a knowledge map about stakeholder management in the construction management literature. The results indicate that researchers have been addressing stakeholder management-related topics since 1985, with 762 articles published during this period. Key topics are examined in-depth, considering different time periods, and a research model presents the evolution of stakeholder management worldwide. The analysis identifies that new trend topics in construction projects are related to stakeholder management. Additionally, this analysis is an ongoing process that can be updated with future publications, providing a reliable foundation to visualize the evolution of stakeholder management over time.

6.The importance of geographical information systems in urban and landscape planning: A bibliometric analysis
Kadir Tolga Çelik, Ahmet Şekeroğlu
doi: 10.14744/megaron.2023.70962  Pages 499 - 519
Since the 1970s, Geographic Information Systems (GIS) have gained increasing recognition in the literature, drawing the attention of numerous scientific disciplines, particularly within technical and environmental sciences. What initially began as computerized map production in the 1970s has evolved with advancements in computer processing power and capacity, supported by various software packages. This study aims to reveal the general tendencies in research studies conducted in the fields of urban planning, spatial planning, and landscape planning. To identify these trends, a bibliometric analysis was conducted by examining literature on studies published worldwide, including Türkiye. For this purpose, 2,354 research and review articles published between 1990 and 2022 and indexed in the Web of Science database were analyzed using VOSviewer software, which is suitable for scientific mapping and bibliometric analysis. The analysis focused on the most frequently published journals, highly-cited authors and countries, collaborative authorship relationships, and the most cited authors, journals, and research topics in Türkiye. As a result, it has been observed that, considering the emergence of modern GIS concepts in the late 1970s and subsequent development based on spatial data from the 1980s, studies in the fields of Urban and Regional Planning, Urban Design, and Landscape Architecture have gained momentum since the 1990s. Research establishing the relationship between GIS and planning in Türkiye has been increasing since 2004, with the primary focus of these studies being categorized into three clusters: site selection, spatial mapping, and mathematical modeling.

7.Analyzing design factors affecting users’ interactions in public spaces
Navid Khaleghimoghaddam
doi: 10.14744/megaron.2023.31384  Pages 520 - 534
Public spaces are now considered the most important environments that play a key role in shaping citizens’ social interactions. Due to uneven development in urban design, this role has become less important. Therefore, it is necessary for architects and urban planners to fill this gap by considering the design factors. This study aims to identify and classify the design factors that influence social interactions in public spaces and present a conceptual framework for designers and future studies. The field study method is used to identify the design factors and the descriptive-analytical survey study is used to evaluate them. Shahriyar Park of Tabriz, Iran, was selected as a case study. 268 users of the park participate in survey including 6 design factors and 22 measurements, which are recorded on Likert scale. LISREL software has been used to analyze the data. The results of the study show that the ‘safety factor’ as the first priority, ‘vitality, activity, psychological and behavioral factors’ as further priorities, and the ‘physical factor’ as the last priority influence the level of users’ social interaction in the public spaces of Shahriyar Park. In this respect, variables such as accessibility, visibility, topography, material diversity, planting, and furniture were found to play a positive role in making the park more pleasant and enhancing social interaction between users. Accordingly, it has been suggested that these factors and variables should be considered by designers as a viable approach when designing urban public spaces, particularly parks, to encourage social interactions among city users.

8.Determination of urban regeneration project conflict causes for the Turkish construction industry
Gökhan Demirdöğen
doi: 10.14744/megaron.2023.15493  Pages 535 - 546
Urban regeneration projects come into prominence for various reasons such as the economic development of cities, earthquakes, urban decay, and lack of land for expansion. Due to the complexity of urban regeneration projects and the participation of multiple stakeholders, conflicts, which impede the successful implementation of projects, among stakeholders are unavoidable. There is limited knowledge about urban regeneration conflict causes in the literature. Existing studies have employed case study methodology and determined project-specific conflict causes. According to the literature review analysis, there has not been a single study to establish the priority orders of urban regeneration conflict causes based on risk severity, risk occurrences, and risk impact in urban regeneration projects. Therefore, this study aimed to identify and determine the urban regeneration conflict causes specific to Türkiye. In the article, the authors detected 69 urban regeneration conflict causes after a focus group discussion. The identified conflict causes were analyzed with the fuzzy TOPSIS methodology by considering the conflict causes’ impacts on project cost overruns, delays in the project schedule, and project quality. The analysis showed that “Construction abandonment by a construction company” and “Bankruptcy of a construction company” are the most significant conflict causes for urban regeneration projects, respectively. The “Imperfect platform for appeal expression and public participation” conflict cause was found to be the least important conflict specific to Türkiye. Practitioners can use the study results to develop urban regeneration strategies and policy formulation, prevent conflicts, or mitigate tension among stakeholders.

9.Climate-responsive daylight system design for primary schools in Türkiye
Gökçe Erdemir Şendur, Alpin Köknel Yener
doi: 10.14744/megaron.2023.65289  Pages 547 - 559
Passive systems are currently the preferred method in architectural design for enhancing energy efficiency in buildings. Utilizing daylight as the primary light source in buildings meets the visual, psychological, and physiological needs of users while avoiding the negative effects of direct sunlight. Therefore, passive systems are widely favored in architectural design to promote energy efficiency. It is essential to use natural lighting as a passive system to reduce a building's energy needs for lighting. Additionally, it creates an appealing visual atmosphere while maintaining comfort requirements.
The daylight criteria for providing sufficient daylight in educational buildings were evaluated in this study related to the TS EN 17037+A1 standard. The study aimed to establish an optimal approach for determining direction, obstruction, and façade design parameters that will ensure sufficient daylight in primary school classrooms in different climatic regions of Türkiye. The study's main focus was to develop a framework for classroom design in educational buildings that takes into account the provision of adequate daylight while avoiding discomfort glare.
"The Minimum Design Guide for Educational Buildings" is a guidebook for constructing educational buildings in Türkiye. However, it lacks detailed specifications for dynamic variables of the environment and interior components. To address this issue, the guide should be improved according to the latest standard of TS-EN 17037-A1, which provides guidelines for daylight design in buildings.

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