Mimarlık Bölümü

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Citation - WoS: 5
Citation - Scopus: 5
Aciksaray "open Palace": a Byzantine Rock-Cut Settlement in Cappadocia
(Walter de Gruyter Gmbh, 2014) Ozturk, Fatma Gul; 140902; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
Courtyard complexes formed entirely out of the volcanic rock mass in Cappadocia, in Central Anatolia, differ from the other rock-cut structures in the region, in both scale and elaboration of design. There are more than forty such complexes in Cappadocia, either gathered in one location or isolated. Located on the Nevsehir-Gulsehir road, Aciksaray contains nine such complexes in close proximity, many of which feature monumental facades as well as reception areas and utilitarian spaces such as large stables around a courtyard. This paper, in the light of survey results, presents site analysis and architectural readings that lead the discussion of the nature and stages of occupation at Aciksaray. By doing this, the paper aims to bring new insights to the discussion on courtyard complexes, adding details and nuance to our understanding of the Aciksaray settlement, while noting similarities with other settlements in the region. Underlining the secular and elite character of the Aciksaray settlement, this study contributes in particular to enlarging the picture of medieval life in Cappadocia, and in general to the studies of Byzantine domestic architecture, for which architectural evidence is still scarce.
Citation - WoS: 1
Addressing Earthquake Risk and Climate Crisis Together in Spatial Planning
(Kare Publ, 2021) Orhan, Ezgi; Peker, Ender; 34038; 05.03. Şehir ve Bölge Planlama; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
Cities' vulnerability to natural and man-made threats are ever increasing. Cities are under the threat of both natural disasters such as earthquakes, avalanches and landslides; and climate-driven challenges such as excessive precipitation, heatwaves and droughts. This calls for a need of handling natural and human systems together for the future of cities. However, climate and earthquake action plans which naturally present a direct link to spatial planning, are often produced separately in the Turkish planning practice. This study advocates that strategies for combating earthquake and climatic challenges should be harmonized together within the spatial planning system, and respectively, aims at presenting a holistic planning approach. For this purpose, the study first examines the ways in which disaster and climate issues are addressed in the current laws and national action plans. Then, in line with the 'Regulation on the Preparation of Spatial Plans', it examines the spatial planning scales with an aim of determining the potential areas in which disaster and climate issues could be planned together. Taking this as a point of departure, the paper presents a set of planning strategies responding to earthquake risk and climate crisis at regional, city, neighbourhood and building scales. It discusses synergies and conflicts among these strategies at different scales. This study targets to develop a holistic perspective for earthquake and climate change induced disasters, for the decision-makers and practitioners operating in spatial planning processes.
Anadolu Selçuklu Devletinde Siyasi Güç Mimari Mekân İlişkisi: Sadeddin Han Örneği
(2023) Önge, Mustafa; 17578; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
Sadeddin Han, 13.yüzyıl Anadolu Selçuklu kervansarayları arasında, sıra dışı bazı mimari özellikleriyle dikkat çeken önemli bir yapıdır. 1236 – 1237 yıllarında Selçuklu devlet adamı Emir Sadeddin Köpek tarafından iki kısım halinde inşa ettirilmiş olan hanın yapım süreci, Anadolu Selçuklu Devletindeki bir iktidar değişikliği ile de eş zamanlıdır. Anadolu Selçuklu Devletinin en önemli hükümdarı Sultan Alaeddin Keykubad’ın vefatının ardından Sultan II.Gıyaseddin Keyhüsrev tahta çıkmış, onun iktidarda olduğu dönem, devlet için birçok olumsuz sonuçlanan gelişmelere sahne .olmuştur. Dönemin yazılı kaynaklarında anlatıldığı üzere; bu iktidar değişikliğinin, hanın banisi Emir Sadeddin Köpek’in önemli ölçüde siyasi güç kazanmasını da sağladığı anlaşılmaktadır. Bu çalışmada, Sadeddin Han’da görülen sıra dışı mimari özelliklerin, yaptıranın hanın inşa sürecinde siyasi güç kazanmasıyla olası ilişkisi araştırılmıştır. Yapıdaki sıra dışı asimetrik plan formunun, geniş ve gösterişli giriş cephesi oluşturma gayretinin nedenleri, yapıdaki izler üzerinden okumalarla açıklanmaya çalışılmıştır. Bu okumaların sonucunda hanın, yapımının ikinci aşamasında bir karar değişikliği ile genişletildiği, bazı özel mekânlar eklendiği ve mevcut plan formunun bu karar değişikliğinin sonucu olarak ortaya çıktığı görülmüştür. Bu karar değişikliğinin zamanını daha hassas saptamaya yönelik olarak, yazılı kaynaklardan edinilen bilgiler, yapının inşaatı süreçlerini etkileyen mimari gereksinimler ve iklimsel etkenler de değerlendirilmiştir. Karar değişikliğinin, 1237 yılında yapının ikinci aşama inşaatı sürecinin ortalarına denk geldiği ve bu zaman diliminin Sultan Alaeddin Keykubad’ın vefatı ve oğlu Sultan II.Gıyaseddin’in tahta geçişi ile çakışma ihtimalinin olduğu ortaya konulmuştur. Yapım sürecindeki karar değişikliğinin ve bu değişiklikle ortaya çıkan, başta plan formu olmak üzere, handaki sıra dışı mimari özelliklerin, Selçuklu iktidarındaki değişim ve bu değişim sonucunda hanın banisinin kazandığı siyasi güç ile ilişkili olabileceği anlaşılmıştır. Çalışmanın hazırlanması esnasında Anadolu Selçuklu Kervansarayları, Sadeddin Han ve Anadolu Selçuklu Devleti tarihi konuları ile ilgili yazılı kaynaklardan faydalanılmıştır. Bu kaynakların yanı sıra çalışmanın konusu olan Sadeddin Han, saha gözlemleri ve belgeleme yaparak bilgi toplamak için düzenli olarak ziyaret edilmiştir.
Citation - WoS: 5
Citation - Scopus: 4
Analysis of a Historic Masonry Building
(Croatian Soc Civil Engineers-hsgi, 2011) Ozmen, Cengiz; Özmen, Cengiz; Akan, Asli Er; Akan, Aslı; Unay, Ali Ihsan; 56939; 4587; Mimarlık; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
The paper starts from the observation that historic masonry buildings are often modified and altered to make them fit for present day use. A single-family masonry house in Turkey, situated in an earthquake prone area and built in the early 20(th) century, is studied. The analysis is made based on Turkish regulations for the initial building and for the building after alterations. Introduction of a reinforced-concrete slab has greatly improved seismic resistance of the building.
Citation - WoS: 19
Analytic Hierarchy Process (Ahp) as an Assessment Approach for Architectural Design: Case Study of Architectural Design Studio
(Konya Technical Univ, Fac Architecture & design, 2018) Harputlugil, Timucin; 40295; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
Architectural design is complex and can be defined as an effective decision-making activity based on problem solving. This complexity is not based on content and volume of problems, but also heterogeneity and uncertainty of information provided for assessment, subjective approaches, and a large number of the criterion for assessment. The aim of this research paper is to contribute to the researches for assessment of architectural design by providing a novel approach based on Analytic Hierarchy Process (AHP) - a Multi Criteria Decision Making (MCDM) method. The approach supports an effective comparative analysis among the alternative projects based on determined criterion. The methodology is implemented with a case study in one of the design studios of Department of Architecture of Cankaya University on final design projects of a group of students with observation, research and assessment. The data used in the assessment is collected through interviews and surveys which is analysed by the help of a software. Based on the outcomes of the AHP-based approach, it has been seen that this approach can provide numerical results that are comparable, measurable, gradable, consistent and can be reported separately for each assessor. However, it has also been found that the AHP-based method is suitable for evaluating only a limited number of projects. With the research, and by setting thresholds levels for evaluation, it has become clear that successful and unsuccessful projects can be separated for achievement and competence. Consequently, it has been observed that the approach has considerable potentials to be further developed to evaluate architectural projects comparatively, especially for architectural students' projects, and other architectural projects such as architectural design competitions.
Citation - WoS: 3
Citation - Scopus: 3
Architect - Structural Engineer Collaboration in Sustainable Structural System Design
(Gazi Univ, 2011) Ozmen, Cengiz; Özmen, Cengiz; Unay, Ali Ihsan; 56939; Mimarlık; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
This paper explores ways of collaboration between architects and structural engineers in the design of sustainable structural systems. Areas of collaboration are explored in terms of seismic design of new structures and rehabilitation of existing structures. Multidisciplinary design teams and an integrated design approach are critical to the process of sustainable building construction. The required group-work skills should be acquired by architects and engineers during their professional education. As a result, this paper also investigates ways in which the structural design education of architects and structural engineers can be redesigned to make their future professional collaboration more harmonious.
Architectural Design - Structural System Conformity Problems Encountered in the Design and Application Processes of Stick Aluminium Curtain Wall Systems in Turkey
(Gazi Univ, Fac Engineering Architecture, 2022) Ozmen, Cengiz; Saban, Muge; 56939; 01. Çankaya Üniversitesi; 05. Mimarlık Fakültesi; 05.02. Mimarlık
Stick aluminium curtain wall (SACW) systems are common curtain wall systems in Turkey. These sytems offer many advantages including architectural variation, modular design, ease of production and assembly. Beside their architectural properties SACW systems create significant load effects on structural systems. These load effects include lateral loads such as seismic and wind loads as well as static vertical loads. This load transfer is not one way. The vertical and lateral displacements of building structures also act on curtain walls. Healthy load transfer between the SACW and the building depends on architectural decisions during the design and construction process. Due to their wide use SACW systems are prone to architectural mistakes. These mistakes often represent themselves at latter stages of the construction and require solutions which will affect the architectural characteristics and structural behavior of buildings. This study focuses on SACW design and construction processes to find the effects of architectural decisions on curtain wall behavior. Case studies that include architectural design mistakes are selected to classify and study the reasons and the solutions of these mistakes. The importance of cooperation between all the stakeholders including the architects and engineers is emphasized for the prevention of these mistakes.
Citation - WoS: 16
Citation - Scopus: 24
Architectural Design Quality Assessment Based on Analytic Hierarchy Process: a Case Study (1)
(Middle East Technical Univ, 2014) Gultekin, A. Tanju; Prins, Matthijs; Topcu, Y. Ilker; Harputlugil, Timucin; 40295; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
An Architectural Reading of Zamyatin’s Intersectional Elements in the Novel “we”
(2021) Çavdar, Rabia Çiğdem; 237969; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
“We” was written by Russian novelist Yevgeny Zamyatin in 1921 after the Soviet Revolution. To be at the edge of the conflicts was scrutinized at the novel, in which the protagonist, labeled as D-503, having a tentative position at the well-defined ground by the power which presented itself as the truth or the law. The narration was constructed via the diary of protagonist; how D-503 perceived the paradigm, which he had lived in, what kind of conflicts and contradictions he had been living with the system was questioned. Zamyatin chose very specific architectural elements to explain and criticize the dominant paradigm of the era -early 1920’s, and the periphery of that dominancy; like Green Wall, Glass Wall, logical labyrinth, cube square, and etc. These intersectional elements were constructed as in the form of blurred voids in order to unfold the ideological positions of the written period of the novel. The materialization and meaning of the walls, could be read as dialectic conceiving of how Zamyatin scrutinized both the revolution and the paradigm. As being a dystopia, the novel “We” criticizes the idealized beliefs that were presented as transparent, lucid and conductive.
Citation - WoS: 10
Citation - Scopus: 16
Artificial Intelligence Applications in Earthquake Resistant Architectural Design: Determination of Irregular Structural Systems With Deep Learning and Imageai Method
(Gazi Univ, Fac Engineering Architecture, 2020) Bingol, Kaan; Akan, Asli Er; Ormecioglu, Hilal Tugba; Er, Arzu; 154406; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
Although the architectural design process is carried out with the collaboration of experts who are experienced in many different areas from the main preferences to the detailing stage, the major decisions such as plan organization, mass design etc. are taken by the architect. Computer Aided Design (CAD) programs are generally effective after the major decisions of the design are taken. For this reason, it is common for the main decisions, taken during the design process, to be changed during the analysis of the structural system. In order to prevent this, in the early stages of architectural design, earthquake system awareness and structural system design should be included as an design input; as, the failure of the structural system which did not considered well in the architectural design phase leads to unexpected revisions in the implementation project phase and thus leads to serious losses in both time and cost. The aim of this study is to create an Irregularity Control Assistant (IC Assitant) that can provide architects general information about the appropriateness of structural system decisions to earthquake regulations in the early stages of design process by using the deep learning and image processing methods. In this way, correct decisions will be made in the early stages of the design and unexpected revisions that may occur during the implementation project phase will be prevented.
Citation - Scopus: 2
Assessing the Reliability of Turkish Building Energy Performance Tool (bep-Tr2) by Case Tests
(EDP Sciences, 2019) Harputlugil, G.U.; Zeki Yilmazoglu, M.; Unlu, G.; 40295; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
This paper aims to draw a general picture of the simplified software for calculation building energy performance based on Turkish Regulations called BEP-tr.v2, which was released at the end of 2017. Even the tool has a simplified calculation methodology, the discussion in this paper is going to be focused on assessing the accuracy of the tool by test cases. The assessing procedure for the tool has two steps. In the first step, box type cases are analyzed, and the results are compared with the results of a detailed energy simulation tool (BES) to perceive the percentage of deviations. In the second step, a current building is selected to use as a test case. The model results are compared with the real consumptions of the building to see the convergence rate of the tool (Bep-TR2). The results showed that the net energy calculation procedure of the methodology needs to be improved. © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0
Citation - WoS: 11
Citation - Scopus: 11
Building Sector Emission Reduction Assessment From a Developing European Economy: a Bottom-Up Modelling Approach
(Elsevier Sci Ltd, 2023) Sarica, Kemal; Harputlugil, Gulsu U.; Inaner, Gulfem; Kollugil, Esin Tetik; 36110; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
In this study, as a developing European economy, the Turkish building sector is assessed for potential CO2 emission reduction with a bottom-up modelling framework with a time horizon starting from 2015 until 2050. Three emission mitigation policies are studied for their emission reduction potentials, namely, increasing the usage rate of energy-efficient appliances, improving the energy performance of the building envelope in existing buildings, and increasing the use of energy-efficient heating and cooling systems. Based on these potentials, three emission reduction scenarios for 5%, 10%, and 21% compared to reference cases are designed and implemented. It is shown that much higher energy savings levels, 6%, 12%, and 28%, are achieved. It has been found that the cost-effectiveness of emission reduction scenarios depends on the policy mix as well as the future emission intensity of the electrical energy consumed, which can reduce the cost of mitigation down to the range of 100-200 USD/tonne CO2.
Cengiz Bektaş’ın Anlatıcı Mimarlığına Bir Örnek: Olbia Sosyal Özeği
(2022) Ormecıoglu, Hılal Tugba; Akan, Aslı Er; 154406; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
Cengiz Bektaş kültür birikimi bilincinin; bizden önce yapılanı bilmek, onu eleştirmek, değerlendirmek, onunla çağdaşı tartışmak, geleceği öngörmek, geçmişe takılıp kalmamak, onu ileriye daha iyiye, daha aydınlığa doğru çekmek ve davranışlarımızın bu bilgilerle uyumlu olmasını sağlamakla oluşacağını savunur. Her ne kadar Bektaş Anadolulukla özdeşleştirilse de yeryüzü kültürü için mimarlıktan yazına kadar damgasını vurmuş bir insanlık ve kültür kazanı olarak “Akdenizlilik” kavramını işaret eder. Akdeniz’in insanlığa düşünce, sanat ve kültür katkısını vurgulayarak Akdenizlilerin bir “yaşama ustası” olduğunu belirtir. Yerel bilgiden öğrenmek ve geleneğe eklemlenmeyi mimari anlayışının başına koyan Bektaş’ın anlatıcı mimarlığı bu çalışmada Akdeniz Üniversitesi için tasarladığı Ağa Han Ödülü’ne layık görülen Olbia Sosyal Özeği üzerinden incelenmiştir. Çalışmada, Bektaş’ın Olbia’da kullandığı yapım tekniğine ve bu tekniğin özgün niteliklerine, ayrıca toplumsal, kültürel, estetik ve mimarlık tarihi açısından önemine odaklanan bir değerlendirme sunulmuştur.
Citation - WoS: 8
Cittaslow Movement From a Critical Point of View
(Kare Publ, 2018) Can, Mehmet Cengiz; Ozmen, Ayca; 143106; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
The Cittaslow Movement, shaped upon the idea of slowness, emerged as a reaction to the negative effects of globalization on small cities. It was founded in 1999 in Italy through initiatives implemented by the mayors of 4 small towns (Greve in Chianti, Orvieto, Positano, Bra) and the founder of Slow Food. This movement, which aims to increase the quality of life by preserving and sustaining the local values of settlements, was quickly embraced by more than 200 small cities and towns in 30 countries. However, Cittaslow is still relatively new and developing movement, and the long-term results are not yet fully known. Cittaslow provides practical guidelines for a more livable settlement, rather than relying on theoretical concerns. It emerged as a result of social reflection rather than scientific research. Therefore, concomitant problems may arise in the implementation process. Nevertheless, in the near future, the concept is expected to continue to grow socially and scientifically through the efforts of Cittaslow International to improve the movement and as a result of the increasing interest of researchers and local authorities. It is therefore important to understand and interpret the essence of the Cittaslow Movement properly at this time. The aim of this article was to provide a framework for the founding ideas and goals of the Cittaslow Movement and to describe its development and progress. The outcomes thus far were evaluated from a critical point of view in order to make new proposals. The goal of this research was to raise awareness of the Cittaslow Movement among all stakeholders, particularly local authorities and residents.
A Comparative Structural, Architectural and Cost-Based Analysis of Seismic Design Principles Applied in Reinforced Concrete Residential Buildings in Turkey
(Crc Press-taylor & Francis Group, 2010) Ozmen, C.; Özmen, Cengiz; 56939; Mimarlık; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
This study demonstrates that it is possible to design earthquake resistant reinforced concrete residential structures without significant compromises in the spatial quality and economic viability of the building. The study addresses architects, structural engineers and private entrepreneurs who are the important players in the Turkish construction industry. In structural analyses, a set of four parametric mathematical models are used to demonstrate the effects of increased column cross-sections and use of shear-walls on the seismic performance of reinforced concrete structures. Architectural analyses are carried-out through three case-studies selected from the earthquake affected city of Bolu in Turkey. Cost-based analyses demonstrated that it is possible to design earthquake resistant reinforced concrete residential buildings with a 4-6% increase in the building cost and an economically acceptable 10% decrease in profits.
Conceptual Framework for a Decision-Making Model Based on the Analytic Hierarchy Process (Ahp) To Select the Best Public Private Partnership (Ppp) Model for Airports
(New Zealand Acad Applied Research Ltd, 2017) Mohammed, Ali Omar; Harputlugil, Timuçin; Harputlugil, Timucin; 40295; Mimarlık; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
The adoption of public-private partnerships (PPPs) as a strategy for infrastructure projects, such as airports, highways, bridges, water supplies, and telecommunication, has been implemented in developed and developing countries with a number of obstacles. Based on this stance, critical success factors (CSFs) of public-private partnership projects and the selection of appropriate PPP models are critical issues that need to be analyzed. A multidisciplinary review of the literature on the critical success factors of public-private partnerships projects reveals the lack of a comprehensive decision-making model for selecting an appropriate PPP model. This paper presents a conceptual framework for a decision-making model to select the best PPP model considering CSFs for developing countries. The model is expected to be used for infrastructure projects, mostly for airports. The decision-making model is structured on the Analytic Hierarchy Process and sensitivity analysis. The decisionmaking model is expected to be adopted as a tool and contribute to decision makers for selecting the best fit PPP model for airports in order to enhance projects successfully.
Citation - WoS: 3
Citation - Scopus: 4
Creation of a New Vernacular Architecture and the Attainment of Sustainability: the Case of Akyaka Town Development
(Mdpi, 2023) Urey, Zeynep Cigdem Uysal; 18663; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
This study problematizes a case where the interpretation of local architectural types by a designer forms a new vernacular architecture that shapes the sphere of a newly developing small town towards one that became sustainable. The house built by Nail Cakirhan for himself in Akyaka (Turkey) opens up a new future in front of the small village of then, towards becoming a touristic center with a specific architectural language of its own. Cakirhan designs his house by interpreting the traditional houses of his hometown, Ula, which is only a few kilometers away from the village of Akyaka. The design of the house initiates the formation of a unique architectural language for Akyaka, which gradually evolves into a new vernacular architecture. Since then, this invented architectural tradition has both transformed the village into a popular touristic town and also initiated a sustainable approach due to its sensitivity for the cultural and natural assets of the context. This architectural language is protected by the master development plan now, and the town is declared as a 'slow-city' due to its culturally and environmentally sensitive character. In order to portray this development, this study will first examine Cakirhan's house in relation to its referential and actual contexts, then it will observe the development of the town of Akyaka by means of looking at Cakirhan architecture in Akyaka, the master development plan of Akyaka that protects the architectural language, and the development of the town as a sustainable, slow-city. The portrayal of the architectural development of Akyaka could demonstrate how a fairly recent architectural practice can today result in the development of a sustainable and harmonious architectural environment.
Citation - WoS: 4
Effects of Occupant Behavior on the Energy Performance of Dwellings: a Sensitivity Analysis
(Locke Science Publ Co inc, 2016) Harputlugil, Gülsu; Harputlugil, Gulsu Ulukavak; Bedir, Merve; 36110; Mimarlık; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
This paper focuses on the influence of occupant behavior on the energy performance of dwellings in the Dutch context. The aim of this study was to identify, how the energy performance of a dwelling is sensitive to the behavior of its occupants. To this end, the study's methodology adopted the Monte Carlo method of analysis, one of the most commonly used means of analyzing the approximate distribution of possible results on the basis of probabilistic inputs. Data related to occupant behavior were generated from a survey of 313 households in The Netherlands. The Dutch reference row house was used to test the behavioral patterns, and the test results were determined through simulation-based modeling. The key input parameters were presence, heating control patterns (thermostat and radiators), and ventilation control patterns (windows, grilles, and mechanical ventilation), while minimum indoor resultant temperature and heating energy demand served as the key output parameters. The results showed that both heating energy demand and minimum indoor resultant temperature were most sensitive to the thermostat setting and most robust in relation to the radiator setting.
Citation - WoS: 1
Effects of Sound Absorption Materials on Reverberation Time According To Their Positions in the Square Plan and High Ceiling Rooms
(Gazi Univ, Fac Engineering Architecture, 2021) Kurtay, Cuneyt; Harputlugil, Gulsu Ulukavak; Yaman, Muammer; 36110; 05.02. Mimarlık; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
In rooms with speech action, subjective and objective room acoustics parameters should be considered in the creation of acoustic performance. In this study, an evaluation has been made over the reverberation time for the speech action of the existing Iraq-Najaf Islamic University Alawiya Conference Hall. Within the scope of the study, the control of the reverberation time affecting the subjective and objective room acoustics parameters has been examined, the relationship between the reverberation time and the surface absorptions of the room have been examined. Reverberation time on existing situation was determined by making in situ measurements. In order to control the reverberation time of the existing hall, the materials selected according to the sound absorption coefficients have been positioned differently and alternative models have been developed. The reverberation times of the alternative models were determined using the ECOTECT v.5.20 computer simulation program used for acoustic analysis, and their geometric acoustics analysis was performed using the ray tracing method. By comparing the models, the surface absorptions have been analyzed to obtain the appropriate reverberation time in room for speech action. As a result of the study, the effects of the use of walls, ceiling and floor finishing materials and surface absorptions on the reverberation time have been evaluated within the scope of improvement for speech action in the halls with square plan, flat floor and high ceiling (min 6 m).
Citation - WoS: 4
Citation - Scopus: 6
Empirical Investigation of Owner-occupiers' Reinvestments in Housing: the Case of Ankara, Turkey
(Springer, 2014) Ozdemir Sari, Ozgul Burcu; 29102; 05.03. Şehir ve Bölge Planlama; 05. Mimarlık Fakültesi; 01. Çankaya Üniversitesi
In Turkey, reinvestments in the existing housing stock are entirely dependent on households' decisions in the free market. There are no policies to consider reinvestment processes, and the body of knowledge on households' reinvestment decisions is scant. Understanding how individual reinvestment decisions are determined is vital to devise policy measures to improve the condition of the existing housing stock and neighbourhoods. In this study, an attempt is made to identify the basic motivations and factors underpinning the owner-occupants' performed and planned reinvestments in the apartment flats of Ankara. The results display that consumption considerations, particularly circumstances of necessity and urgency, are the basic motivation for undertaking reinvestment works among the surveyed owner-occupants. Higher household head age, shorter duration of occupancy, higher house value and maintained installations and infrastructure in common parts of the apartment blocks are displayed to increase the probability of having undertaken reinvestment works. Also, perception of the dwelling to be in disrepair and landscaped common outdoor space of the apartment are identified to increase the probability of having reinvestment plans for the future. The analysis suggests that policy measures are required both to trigger reinvestment capacities of households and to monitor the tendencies of reinvestments.

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