Yazarlar
- Aydin, Metin Mutlu(13)
- Araz, Onur(11)
- Coruh, Emine(7)
- Peker, Iskender(6)
- Üzülmez, Mehmet(6)
- Mızrak, Sefa(5)
- Ozturk, Kasif Furkan(5)
- Seferoğlu, Mehmet Tevfik(5)
- Çoruh, Emine(5)
- Akpinar, Muhammet Vefa(4)
- Alemdağ, Selçuk(4)
- Bayraktar, Alemdar(4)
- Bilgic, Abdulbaki(4)
- Cakir, Tufan(4)
- Comert, Resul(4)
- Dağ, Serhat(4)
- Çavdar, Özlem(4)
- Akinoglu, Bulent G.(3)
- Alemdag, Selcuk(3)
- Altunişik, Ahmet Can(3)
- Ar, Ilker Murat(3)
- Bilgilioglu, Burhan Baha(3)
- Eraslan, Selim(3)
- Erol, Ismail(3)
- Günen, Mehmet Akif(3)
- Nizetic, S(3)
- Ozden, Talat(3)
- Papadopoulos, A(3)
- Sevin, Sedat(3)
- Urak, Faruk(3)
- Yalvac, Sefa(3)
- Çavdar, Ozlem(3)
- Çelik, Muhammet(3)
- Çömert, Resul(3)
- Özdemir, Samed(3)
- Acar, Ramazan(2)
- Akbulut, Zeynep(2)
- Akgol, Kadir(2)
- Aksüt, Yavuz Selim(2)
- Altundaş, Suna(2)
Yayınlar
- MakaleAçık Erişim2020Air pollution, a possible risk factor for multiple sclerosis
Börü, Ulku Turk; Bölük, Cem; Tasdemir, Mustafa; Gezer, Tugce; Serim, Vedat Ataman
Objective Studies focusing attention on the effects of environmental pollution on the etiology of multiple sclerosis (MS) are on the increase. The aim of this study was to determine MS prevalence in a city home to an iron and steel factory which causes air pollution. Methods The study was designed as a cross-sectional, population-based, descriptive epidemiologic study. Eregli city, which has an iron and steel factory and proven air pollution, was screened. Additionally, Devrek city, which is a rural and clean city, located 40 km away from Eregli was assigned and results were compared. A validated questionnaire was used for screening. McDonald 2010 criteria were used to diagnose cases. Results 32 261 people were screened in Eregli, and 21 963 people were screened in Devrek. In total, 41 patients were diagnosed with clinical definite MS. Crude prevalence was found to be 96.1/100 000 in Eregli and 45.5/100 000 in Devrek. The mean age of patients was 39.8, and the female/male ratio was 1.9. Conclusion The results of this study indicate a more than double MS prevalence rate in the area home to an iron and steel factory when compared to the rural city. This supports the hypothesis that air pollution may be a possible etiological factor in MS.
- MakaleAçık Erişim20203D digital representation of cadastral data in Turkey-Apartments case
Döner, Fatih; Şirin, Samet
With the widespread use of three-dimensional (3D) geographic information technologies, studies for 3D digital representation of property units in cadasters have increased in recent years. In Turkey, a project named 3D City Models and Cadasters was initiated by the General Directorate of Land Registries and Cadasters in 2018. With this project, which is planned to last four years, it aims to create 3D models of individual units (apartments) in buildings and provide visual representations of these individual units with legal information. Transition from the current 2D representation towards a 3D digital cadaster requires not only replacing analog drawings with 3D models but also examining the workflow for forming the property units. In this study, the process of registration of property rights for individual units is examined and possibilities and challenges for successful completion of the 3D cadaster project are evaluated from a legal, an organizational, and a technical point of view. Government plays a lead role by adopting the digital transformation as a state policy. However, new regulations and organizational settings may have to be introduced. Modeling and visualization alternatives for 3D data should be studied further.
- MakaleYalnız künye2020Validating InSAR-SBAS results by means of different GNSS analysis techniques in medium- and high-grade deformation areas
Yalvac, Sefa
This study aimed to validate the interferometric synthetic aperture radar (InSAR) method by using relative and absolute Global Navigation Satellite System (GNSS) techniques. In this context, two land subsidence areas, one high (Mexico City) and one medium (Aguascalientes), were monitored between 2014 and 2018 by using Sentinel 1A satellite data. The monitoring was carried out with the Small Baseline Subset (SBAS) technique using 46 images for Mexico City and 18 images for Aguascalientes. Concordantly, the GNSS Continuously Operating Reference Station (CORS) data in the regions were analyzed with relative and Precise Point Positioning (PPP) GNSS analysis techniques. The time series obtained from three different analyses were compared and the results were evaluated in light of statistical criteria. According to the results, it is determined that the InSAR-SBAS technique can vary up to ± 20 mm from the displacement values obtained from GNSS due to various noise sources. Such deviations were limited to a few samples, and in general the differentiations were reasonable in the range of 7–8 mm. The difference between the deformation velocity estimation results obtained from the three different methods varied between 3 and 10 mm/year. In this context, these findings suggest that the InSAR-SBAS technique is an effective method for monitoring land deformation with the accuracy of sub-centimeter decided. In addition, PPP which has become an increasingly popular technique showed fast and reliable results in the range of 5–10 mm for InSAR verification. Moreover, with this study, most current results for Mexico City, which is the world’s fastest subsiding metropole, were achieved. In the central region of the city, the detected 300 mm/year of subsidence rate was updated as 370 mm/year. In addition, Aguascalientes was monitored by using the Sentinel 1A satellite mission for the first time in this study. The 60 mm/year subsidence rate obtained for Aguascalientes in previous studies was updated and it was estimated that there are zones where this rate reaches up to − 115 mm/year levels. In this regard, it was concluded that the deformation rate has increased for both regions since the previous monitoring studies.
- MakaleYalnız künye2020Medium scale earthflow susceptibility modelling by remote sensing and geographical information systems based multivariate statistics approach: an example from Northeastern Turkey
Dağ, Serhat; Akgün, Aykut; Kaya, Ayberk; Alemdağ, Selçuk; Bostancı, Hasan Tahsin
The aim of the present study was to produce an earthflow susceptibility map for the city center and environs of the province of Rize located at the Northeastern part of Turkey. The study area is the rainiest region of Turkey, and due to the triggering effect of precipitation earthflows are frequently observed in and around the study area. Besides this point, weathered rock units and steep topography accompany with precipitation for the occurrence of earthflow cases. Considering this point, an earthflow susceptibility mapping was inferred to be a necessity for the area. Parameters, such as lithology, slope gradient, slope aspect, topographical wetness index (TWI), stream power index (SPI), slope curvature, and sediment capacity index (LS) were considered to be earthflow conditioning parameters. A multi-temporal earthflow inventory map for a period of 4 years (2011–2015) was initially generated by way of remote sensing approach and field surveys. Earthflow susceptibility map was produced using the logistic regression method after which the produced susceptibility map was validated. The mapped earthflows were separated into two groups prior to modelling and validation. The first group was for training and the second group was for validation steps. The accuracy of the model was measured by fitting them to a validation set of mapped earthflows. Area under curvature (AUC) approach was applied for validation purposes. The prediction capability of the earthflow susceptibility map produced can be regarded as acceptable in accordance with the AUC values of 0.62 for the logistic regression model. Based on these results, the obtained earthflow susceptibility map can be used to mitigate hazards related to landslides and to aid in land-use planning for the Rize city center.
- MakaleAçık Erişim2019The Investigation of Effective Parameters on Trip Length of Bikesharing Systems (BSS)
Aydin, Metin Mutlu; Yıldırım, Mehmet Sinan
Various bike sharing systems (BSS) were designed and used in different cities of the world in the past decade. Manybenefits of the BSS have supplied a rapid growth of this transport mode in all around the world. BSS mainly have manybenefits such as traffic (flexible mobility and multimodal transport connections), health (physical activity) and cost (lowtrip cost). Also a planned BSS can serve an easy access to other public transportation system and can be an importantactor of the public transportation system. Especially in many big cities, bike sharing systems becomes an important partof the public transportation and ensure short travel times to users. However, the growing may causes many problemssuch as demand, safety, effectiveness, cost etc. For this purpose many studies have conducted by the planners,researchers and decision makers to find best solutions to mentioned problems. In the scope of this study, the relationamong average temperature, trip length and trip number was examined for a bike sharing system. For this purpose,Capital Bikeshare system (Washington, D.C., Arlington and Alexandria, VA and Montgomery County, MD) is chosenas pilot system to investigate. Study results showed that there is a strong and positive correlation among temperature,trip number and trip length. Additionally, it was obtained that bicycle utilization has a maximum value between 5-10minutes. This results can be caused by the free utilization duration (30 minutes) of the system for the members.
- MakaleAçık Erişim2019Sürdürülebilir Turizm Göstergeleri Bağlamında Ev Pansiyonculuğunun Değerlendirilmesi: Yusufeli Örneği
Zurnaci, Jalenur; Çalık, İsmail
Sürdürülebilir turizm göstergeleri destinasyonlarda turizmin etkilerinin belirlenmesi, turizmkaynaklı tahribatların ölçülmesi ve düzeltici önlemlerin alınması konularını içeren birplanlama sürecidir. Ev pansiyonculuğu ise yerel kalkınmaya katkıda bulunmak ve bukavramı turizm çeşitliliği içerisinde geliştirmek amacı ile yaygınlaştırılmaya çalışılan birkonaklama biçimidir. Ayrıca, ülkemizin farklı bölgelerinde yaygın olan evpansiyonculuğunun turizme ekonomik, sosyal ve kültürel yönlerden katkısı olduğugözlemlenmektedir. Sürdürülebilir turizm göstergeleri planlama sürecinde Yusufeli’nde evpansiyonculuğunun sürdürülebilirliğinin paydaşların bakış açılarıyla araştırılması buçalışmanın temel amacıdır. Çalışmada elde edilen verilerin toplanmasında görüşme, analizedilmesinde içerik analizi ve betimsel analiz yöntemleri kullanılmıştır. Evpansiyonculuğunun ekonomik sürdürülebilirliği ele alındığında elde edilen gelirleringeçmişe oranla azaldığı, gelirin nispeten köy halkının geneline yayıldığı, fiyatlardakitutarsızlık, mevsimsellik ve ulaşım sorunlarının problem oluşturduğu katılımcılar tarafındanifade edilmiştir. Çevresel sürdürülebilirlik değerlendirildiğinde ise bölgede evpansiyonculuğunun genel anlamda çevresel tahribata neden olmadığı söylenebilir. Sosyokültürel sürdürülebilirlik açısından ise ev pansiyonculuğunun kadın istihdamına katkısağladığı, turist-yerel halk arasında samimi ilişkiler kurularak karşılıklı öğrenmenin teşvikedildiği belirtilebilir.
- MakaleAçık Erişim2019Bicycle Transportation Planning For Gumushane Province
Çoruh, Emine; Öztürk, Ömer Faruk
The aim of this study is to design a 10.500 meter bicycle path for the use of a bicycle as a means of transportation in Gümüşhane city center. A bicycle route has been identified considering the characteristics of the city and its current transportation network. The design of bicycle paths and the cost of application projects were prepared throughout the selected route. Also, a face-to-face survey was conducted covering the city center and the university campus. It has been tried to learn the opinion about the cycling habit of public, benefits of cycling and the obstacles to cycling in the city within the scope of the survey. According to Chi-square and Phi-Cramer's V tests the results of the survey, significant relationships were found between the gender of participants and cycling, the education level of participants and cycling, and the definition of cycling. The cost of designed bicycle path construction is 2.740.900 Turkish Liras (TL) and was found about three times less than the cost of a single lane highway. As a result, it was found that cycling is healthy, safe, economical, environmentally friendly and easily reachable. These characteristics of cycling show that cycling for sustainable transport is one of the most important solutions to urban transportation problems.
- MakaleYayıncıda açık erişim2019The investigation of different chicane applications in traffic calming studies using driving simulator; [Trafik sakinlestirme çalismalarinda farkli kivrimlama uygulamalarinin sürüş simülatörü ortaminda incelenmesi]
Aydin, Metin Mutlu; Akgöl, Kadir; Günay, Banihan
High vehicular speeds are one of the most frequent complains in urban roads. Lack of obedience to speed limits results in many fatal accidents. Traffic calming measures have been widely used in many developed countries to reduce accidents, the negative effects of speeding and traffic noise in urban roads. In the scope of this study, horizontal calming measures, namely chicanes, which are not in use in Turkey yet, have been studied by using a driving simulator for the aim of controlling and reducing vehicular speeds. For this purpose, Akdeniz University campus was selected as the pilot case area and a number of different roads in the campus have been modeled in 3D. It was determined from the speed data that for divided four lane carriageways, chicane number 10 (K10) which has 3 m effective width and 45 entry and exit angles, for undivided two lane carriageways, chicane number 2 (K2) which has 2.7 m effective width and 60 entry and 30 exit angles, gave the best outcome from the driving tests in accordance with the characteristics of Turkish drivers. Furthermore, based on the findings, common driver errors are identified and a number of recommendations are made.
- BildiriYalnız künye2019Object-based classification of Izmir Metropolitan City by using sentinel-2 images
Ozlem Yilmaz, Elif; Varol, Beril; Hale Topaloglu, Raziye; Sertel, Elif; Menekay, S.; Cetin, O.; Alparslan, O.
This study aims to create Land Cover Land Use (LCLU)map of a part of the Izmir metropolitan city in Turkey, based on an enhanced Urban Atlas nomenclature and object based classification approach. Multi-temporal Sentinel-2 images from different seasons are used and rule-based object oriented classification techniques are applied on the images. Totally 20 LCLU classes are identified in the study area with different accuracy values. Thematic open source data were also integrated into classification to better identify some land use classes and to increase the total classification accuracy. Our results show that 10-m bands of Sentinel-2 images are capable to produce thematically detailed LCLU map with an overall accuracy of 86% and 0.852 Kappa values.
- MakaleYalnız künye2019Performance Comparison of Various Chicane Types: A Driving Simulator Study
Aydin, Metin Mutlu; Gunay, Banihan; Akgol, Kadir
Urban streets are becoming noisy, less safe and unattractive places due to high traffic volumes and vehicular speeds. Especially, high speeds causes many problems such as traffic accidents, noise, etc. To prevent these problems and negative effects of speeding, traffic calming measures have been widely used in many developed countries. In this study, the effectiveness of ten most common chicane types on speed limit compliance were examined by comparing and ranking chicanes according to their performance. For this purpose, a “Safety Index” was developed and an Ordinary Least Square Regression analysis was performed to identify safest chicane types for undivided two-lane and divided four-lane roads by using various parameters. Additionally, statistical tests were conducted to determine the most important driver characteristics of drivers before and inside the chicanes. For the analyses, all necessary data were obtained from the driving tests of 106 volunteers using a driving simulator. For the simulation scenarios, Akdeniz University’s (Antalya/Turkey) campus roads were selected as a case area. The results showed that Chicane Types 2 (CT-2) and 7 (CT-7) have the highest Safety Index values (0.69 and 0.98) and they were found to be the most proper CTs for the undivided and divided roads, respectively. From the statistical tests, it was also found that education level, gender and driving license duration were found to be the statistically significant parameters on speed choice for the most proper chicane types. Additionally, it was concluded that the most important driver characteristics are determined as age (has a negative effect) and gender (to be male has a positive effect) of drivers before and inside the chicanes. All these findings show that the investigation of different CTs has a great potential to reduce speeds and ensure safety in urban minor roads to limit vehicle speeds.
- MakaleAçık Erişim2019Effects of pavement surface deformations on traffic flow
Aydin, Metin Mutlu; Topal, Ali
Pavement surface deformations have a significant effect on speed profile of vehicles and traffic flow conditions. These deformations limit driving properties and increase vehicle operation and maintenance costs. Additionally, they cause many problems such as accidents, slower movement speeds, capacity loss and severe discomfort states. There are many factors having an effect on road capacities and they vary according to different road and traffic flow conditions. In this study, it is aimed to investigate and develop models to estimate shockwave and bottleneck forming, capacity loss and speed reduction, which occurred on examined road links caused by pavement deformations. For the prediction of road capacity, flow–density (q–k) relationship, bottleneck and shockwave analysis methods were used. In the scope this study, deformed road links were divided into three sections; Section A – before deformation zone, Section B – deformation zone, and Section C – after deformation zone. All three sections were investigated and empirical results were obtained. According to analysis results, it was found that pavement surface deformations have a negative effect on the level of road service capa-bility. Obtained results also showed that there are significant reductions in capacity relatively by up to 44 and 26% would result from surface deformations on deformed lanes and non-deformed adjacent lanes.
- MakaleAçık Erişim2018Turizm Tanıtımında Gastronomik Değer Vurgusu: Unesco Gastronomi Şehirleri Örneği
Akdu, Uğur; Akdu, Serap
Unesco Yaratıcı Şehirler Ağı kapsamında dünya genelinde 26 şehir Gastronomi Şehri unvanı almıştır. Bu unvan özellikle gastronomi turizmi ve turistleri için tercih sebebi olabilecek önemli bir unvandır. Bu araştırma gastronomi şehri unvanı alan şehirlerin, bu unvanı resmi web sitelerinde tanıtım ve pazarlama aracı olarak kullanıp kullanmadıklarına odaklanmaktadır. Bu kapsamda ilgili şehirlerin web siteleri içerik analizi yöntemiyle analiz edilmiştir. Sonuçlar incelendiğinde, şehirlerinin çoğunluğunun web sitelerinin ana sayfasında Unesco vurgusu yapmadığı, konuyla ilgili Unesco resmi logosu ve gastronomi şehri logosu gibi temaları kullanmadığı ayrıca gastronomi turizmi ve ziyaretçilerine yönelik bilgilendirme yapmadığı, incelenen 23 şehrin resmi web sitesinden sadece bir tanesinde gastronomi rotası ve haritasının bulunduğu görülmüştür.
- MakaleAçık Erişim2018Güneş Enerji Santralleri İçin Uygunluk Haritasının Elde Edilmesi: Bir Uygulama
Eroğlu, Hasan
Günümüzde güneş enerjisi, hayatımızın en önemli ve kaçınılmaz bir parçası haline gelen yenilenebilirenerji kaynaklarından (YEK) biridir. Her geçen gün dünya üzerindeki güneş enerji santrali (GES) sayısı katlanarakartmaktadır. Uygulama sayısı artan bu santrallerin çevresel, ekonomik ve sosyal açıdan en uygun yer tayinlerininyapılması oldukça büyük önem arz etmektedir. Bazı durumlarda santral kurulum yerini etkileyen bir önemli kriterinbile göz ardı edilmesi oldukça büyük zararlara neden olabilmektedir.Bu çalışmanın amacı, literatürdeki çalışmalarda eksikliği tespit edilen ve GES kurulumunu etkileyen kriterlerinönerilmesi, GES kurulumunu etkileyen tüm kriterlerin birbirlerine göre önem derecelendirme değerlerininbulunması ve kriterlere ait örnek bir çalışma alanında coğrafi veriler yardımıyla GES için uygunluk haritasının eldeedilmesidir. Kriterlerin ağırlık değerlerinin bulunmasında Bulanık Analitik Hiyerarşi Yöntemi (FAHP), verilerinişlenmesinde de coğrafi bilgi sistemleri kullanılmıştır. Bu amaçla 14 ana kriter ve bu kriterlere ait 70 alt kriterkonuyla ilgili uzman görüşleri, anketler ve literatürdeki çalışmalardan yararlanılarak belirlenmiştir. Çalışmanınsonunda, çalışma alanında GES’ler için en uygun, uygun ve izin verilmeyen yerlerin gösterildiği uygunluk haritasıelde edilmiştir. Bu çalışma, GES’lerin yer tespitinde daha doğru, çevresel, ekonomik ve sosyal GES santralikurulumunu netice veren geniş yelpazedeki kriterlerle araştırmacılara faydalı olacaktır.
- MakaleAçık Erişim2018Türk sürücülerin facebook sosyal paylaşım sitesini trafik bilgilendirme amacıyla kullanımı üzerine bir araştırma
Aydin, Metin Mutlu; Saplioglu, Meltem; Ünal, Ayşe
Teknolojik gelişmeler ve beraberinde getirdiği geniş iletişim olanakları, insanlarınçevrelerinde ortaya çıkan olayları algılama ve bu olaylar üzerine yorum yapabilmeolanağını artırmaktadır. Bilgiler, sosyal medya platformları ile hızlı ve evrenseldüzeyde yayılmakta; kısa süre içerisinde insanların bu içeriklere yorum yapıpkendi görüşlerini ifade edebilmelerine olanak sağlamaktadır. Sosyal medyanınbilgiyi kitlelere kolay ulaştırması ve grup kurma olanağı sunması; insanların belirlikonularda bu tür mecralarda yaygın şekilde örgütlenmesini sağlamaktadır. Buçalışma kapsamında, Ülkemizde ve Dünya’da yaygın olarak kullanılan sosyalmedya platformlarından Facebook’un trafikle ilgili birçok konuda sürücülertarafından kullanımı ve kentiçi ulaşımda etkileri incelenmeye çalışılmıştır. Buamaçla ilk aşamada Türkiye’de 81 ilde kurulan ve hızla yayılan Facebook “Trafik”gruplarının üye sayısı üzerinde etkili parametreler araştırılmıştır. Gruplardakigüncel kullanıcı sayıları tespit edilmiş; üye sayıları, incelenen illerle ilgiliparametrelerin etkisi, Adaptif Ağ Tabanlı Bulanık Çıkarım Sistemi (AdaptiveNetwork Fuzzy Inference System, ANFIS) ile modellenip tahmin edilmiştir. İkinciaşama olarak, grup sayısında yaşanan artışın trafik kazaları ve cezaları üzerindekietkisi korelasyon analizi ile incelenmiştir. Bağımlı (Facebook “Trafik” grup üyesayısı) ve bağımsız (eğitim düzeyi oranı, çalışan oranı, motorlu taşıt oranı veehliyetli sürücü oranı) değişkenler arasındaki ilişkiyi inceleyebilmek amacıylakorelasyon analizi yapılmış ve regresyonun açıklama gücü 0,77 olarak eldeedilmiştir ANFIS analizinde 62 il için belirlilik katsayısı R2=0,90 olarak tahminedilmiştir. İkinci aşamada, sosyal medya kullanımı ile trafik ceza sayılarında vetrafik kaza sayılarında bir değişim olup olmadığı araştırılmıştır; trafik ceza ve kazasayıları üzerindeki etki için daha detaylı mekânsal verilere ihtiyaç duyulduğu,gelecekte yapılacak çalışmalarda kaza olan kesimlerdeki sosyal paylaşımverilerinin toplanarak incelenmesi gerektiği görülmüştür.
- MakaleAçık Erişim2018Detection of collapsed building from unmanned aerial vehicle data with object based image classification
Avdan, Uğur; Çömert, Resul; Küçük Matcı, Dilek
Buildings are most affected the objects by earthquake disaster. Detection of collapsed buildings after an earthquake isimportant both for determining the current situation and quick response. Unmanned aerial vehicles that have evolved inrecent years, can provide very high resolution images of the earth surface using camera systems attached to them.Information for the intended purpose can be obtained through the products produced from these images.In this study, collapsed buildings were detected in the area where high-resolution images were obtained whit unmanned aerialvehicle in 2015 and 2014. Building detection process was made based on a scenario events. In this context, 2015 images weretaken before the earthquake and 2014 images were taken after the earthquake. The images of both years were processedseparately to produce the digital elevation model and orthophoto image of the study area. building of the study area wereobtained by applying the object-based classification process to the generated data. 11 buildings which were available in thearea in 2015 and not available in the area in 2014, were detected successfully comparison of building classes of two years.
- MakaleAçık Erişim2018Automatic extraction of building boundaries from high resolution images with active contour segmentation
Akbulut, Z.; Özdemir, S.; Acar, H.; Dihkan, M.; Karsli, F.
Building extraction from remotely sensed images plays an important role in many applications such as updating geographical information system, change detection, urban planning, disaster management and 3D building modeling. Automatic extraction of buildings from aerial images is not an easy task because of background complexity, lighting conditions and vegetation cover that reduces separability or visibility of buildings. As a result, automatic building extraction can be a complex process for computer vision and image processing techniques. In order to overcome this difficulty region-based active contour model was used to automatically detect the boundary of buildings for this study. To extract object boundaries, the model grows or shrinks the initial contour in the image. The main objective of this paper is making active contours algorithm perform without user interaction and to detect automatically initial contours to segment buildings with a software coded in Matlab. This task carried out by morphological operations, band ratio and thresholding methods. In this study, high resolution aerial images with 8 cm ground sampling distance (GSD) were used. Three separate test zones were selected with varying building level of detail on these images. Finally, it was assessed the accuracy of segmented buildings using Correctness, Completeness and Quality metrics by comparing the results images and manually digitized reference image. The proposed approach for building extraction from images was shown to be 98% accurate on buildings with simple geometry and homogeneous roof textures. However accuracy of extracted buildings with heterogeneous roof textures and lighting, and complex geometry is 89%. The results clearly show that automatically calculated initial contour positions work in accordance with the active contour algorithm and easily extraction of the buildings boundaries.
- MakaleYalnız künye2018Earthquake Performance of Reinforced-Concrete Shear-Wall Structure Using Nonlinear Methods
Çavdar, Ozlem; Çavdar, Ahmet; Bayraktar, Ender
In earthquake engineering, the performance-based design method is used to determine the expected performance level of structures under an earthquake effect. The level of performance is related to the damage situation that could occur in the structure after the earthquake. In performance-based structural design, it is predicted that more than one damage level can emerge under one earthquake effect. In this study, the seismic behavior of a reinforced-concrete shear-wall building that collapsed during the 2003 Bingol earthquake was investigated by nonlinear static analysis and nonlinear dynamic analysis. The selected reinforced-concrete shear-wall structure is located in Bingol, Turkey. Local code was considered for assessing a seismic performance evaluation of the selected reinforced-concrete shear-wall building. The performance goals of the reinforced-concrete shear-wall structure were evaluated by applying the pushover (incremental equivalent earthquake load) method and procedures of the code and nonlinear dynamic analysis. According to the code, the reinforced-concrete shear-wall building was not expected to satisfy life safety performance levels under a design earthquake. In this study, one collapsed building was selected in order to test the reliability and usability of performance analysis methods under different earthquakes.
- MakaleAçık Erişim2018Old Concepts, New Contents: The City, Cinema and the Stranger
Demir, Sertac Timur
This study is a cinematic portrait not of the real, but essentially of the updated Istanbul. In the case of the strangers of cinematic Istanbul, the most strategic, useful, as well as the most difficult step for updating the city's image is to shift the axis from its centres, touristic places, familiar characters, common values and usual events to its corners, secondary places and characters, minimalist conditions, ambivalent values and current changes. For this purpose this study analyzes five films as sociological testimonies without touching upon their details but by focusing on their references: Politiki Kouzina/Bir Tutam Baharat/A Touch of Spice (Tassos Boulmetis, 2003), Koprudekiler/Men on the Bridge (Asli Ozge, 2009), Kac Para Kac/A Run for Money (Reha Erdem, 1999), Uzak/Distant (Nuri Bilge Ceylan, 2002), and 11'e 10 Kala/10 to 11 (Pelin Esmer, 2009). These films, which constitute the framework of this research, are breaking points of modern Istanbul's social and urban history and of changing form of strangers.
- BildiriYalnız künye2018Reducing Urban Heat Islands by Developing Cool Pavements
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