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Yayın Reviewing the effects of spatial features on price prediction for real estate market: Istanbul case(IEEE, 2022-09-16) Ecevit, Mert İlhan; Erdem, Zeki; Dağ, HasanIn the real estate market, spatial features play a crucial role in determining property appraisals and prices. When spatial features are considered, classification techniques have been rarely studied compared to regression, which is commonly used for price prediction. This study reviews spatial features' effects on predicting the house price ranges for real estate in Istanbul, Turkey, in the classification context. Spatial features are generated and extracted by geocoding the address information from the original data set. This geocoding and feature extraction is another challenge in this research. The experiments compare the performance of Decision Trees (DT), Random Forests (RF), and Logistic Regression (LR) classifier models on the data set with and without spatial features. The prediction models are evaluated based on classification metrics such as accuracy, precision, recall, and F1-Score. We additionally examine the ROC curve of each classifier. The test results show that the RF model outperforms the DT and LR models. It is observed that spatial features, when incorporated with non-spatial features, significantly improve the prediction performance of the models for the house price ranges. It is considered that the results can contribute to making decisions more accurately for the appraisal in the real estate industry.Yayın Status of the Focal Plane Instrumentation (FPI) Project of the 4 m DAG Telescope(SPIE, 2016-08-09) Keskin, Onur; Yerli, Sinan Kaan; Yeşilyaprak, Cahit; Güver, Tolga; Aliş, Sinan; Yelkenci, Filiz Korhan; Güçsav, Bülent Burak; Arabacı, Mehtap Özbey; Erol, AyşeDAG (Eastern Anatolia Observatory in Turkish) will be the newest and largest (4m) observatory of Turkey in both optical (VIS) and near-infrared (NIR) Owith its robust observing site infrastructure. The telescope is designedOto house 2 Nasmyth platformes which will be dedicated to NIR and VIS observations. A collaboration has recently been established among four Turkish universities including FMV Isik University (for adaptive optics systems), Middle East Technical University (fort measurement, test and calibration purposes), Istanbul University (for new technology instruments, e.g. MKIDs) and as the coordinator Ataturk University (for obtaining NIR and VIS instruments). In this paper the status of the recently approved FPI project and its aims are presented and possible collaboration opportunities are emphasized.Yayın Photogrammetric deformation monitoring of the second Bosphorus Bridge in Istanbul(International Society for Photogrammetry and Remote Sensing, 2014) Avşar, Özgür; Akça, Mehmet Devrim; Altan, Mehmet OrhanImproving the efficiency of bridge inspection and minimizing the impact of dynamic load on the long term deterioration of the bridge structure reduces maintenance and upkeep costs whilst also improving bridge longevity and safety. This paper presents the results of an on-going project whose ultimate goal is the real-time photogrammetric monitoring the structural deformations of the second Bosphorus Bridge of Istanbul.Yayın A practical multiple factor index model for shopping center investment decisions in İstanbul(Işık Üniversitesi, 2020-01-20) İlhan, Dursun Onur; Ferman, Ali Murat; Işık Üniversitesi, Sosyal Bilimler Enstitüsü, Çağdaş İşletme Yönetimi Doktora ProgramıIstanbul shopping center market is currently dealing with problems in the social and environmental spheres, in addition to its challenges at the commercial side. This thesis presents a genuine multi-factor evaluation model that can be used by all stakeholders of the market. While doing so, the model has its base on the paradigm of strong sustainability and the principles of sustainable development. First of all, an extensive literature review has been conducted in this respect. Accordingly, the model is built on Commercial, Social and Environmental Pillars and their industryrelated sub-factors (nine sub-factors that are corresponding to a total of twenty-six underlying headlines) are determined. Afterwards, an analytical hierarchy process (AHP) survey model has been developed based on these pillars, sub-factors and underlying headlines and it is performed face-to-face on the top decision-makers of twenty-one (out of twenty-five eligible entities that answered back) members of the Council of Shopping Centers Turkey (AYD) which have at least one self-developed Istanbul shopping center in their portfolio. Commercial Pillar has been selected by the decision-makers as the most important component with %58.1; while Social and Environmental pillars stayed behind with 22.8% and 19.1% respectively. Following this result, another primary research setup has been formulated in order to create a more objective ground. This time, a panel comprised of three experts working on the field of sustainability is assembled and individual structured face-to-face interviews which included two open-ended questions are conducted and recorded with each participant. As a result of the constructive insights that have been in line with the literature review, assigning ethical protection to the Social and Environmental Pillars of the model is deemed reasonable. This decision is also reflected in the visualization of the model. The model also offers an open source, practical Project Checklist. This thesis also acts as an overview of the foundations of sustainability, development of shopping centers, Istanbul’s urban development and its shopping center market.Yayın Aeolian imprints of multiple Mediterranean invasions of the Black Sea during Pleistocene(Elsevier B.V., 2022-03-04) Erginal, Ahmet Evren; Güneç Kıyak, Nafiye; Makaroğlu, Özlem; Bozcu, Mustafa; Öztürk, Muhammed Zeynel; Selim, Haluk Hamit; Nowacyzk, Norbert R.; Kaya, Nurcan; Öztürk, Tuğba; Karabıyıkoğlu, Mustafa; Polymeris, Georgios S.Climate changes determined the repeated connections between the Black Sea, Caspian Sea and Mediterranean Sea. The landlocked anoxic Black Sea basin was exposed to several transgressions throughout Quaternary by the Mediterranean Sea through the Straits of Istanbul (Bosphorus) and by the Caspian Sea through the Manych-Kerch spillway. Sedimentological records of these connections are limited mostly to the marine terrace deposits of Marine Isotope Stage (MIS) 5e while the pre-MIS 5e period remains uncertain due to a lack of robust facies and chronological data from deep-sea sedimentary sequences. Here we discuss the imprints of multiple Mediterranean transgressions during Middle Pleistocene in the Black Sea based on facies analysis and the optical age of coastal carbonate aeolianites. Contrary to today's hydro-climate of the Black Sea, the aeolianites bear witness to the transformation of the Black Sea into a warm inland sea during successive Mediterranean invasions. Prior to the onset of aeolian deposition, paleosols were formed on the Eocene-aged hardened sandy silts, suggesting strongly washed soil. This is evidenced by no calcium carbonate and a high Rb/Sr ratio, with quartz amounting to of 99.8%. According to our OSL ages, carbonates deposited on the shelf plain under higher temperature and increased evaporation conditions in MIS 15 and the later interglacial phases were transported to the coastal sand dunes during the transitional phases of MIS 15–14, MIS 13–12, MIS 11–10 and MIS 9–8. We suggest that the carbonate-rich and ooid-containing aeolianites were repeatedly formed in the multiple Mediterranean transgression stages, beginning with an increasingly severe dry phase following the Brunhes-Matuyama magnetic reversal.Yayın Forecasting and analysis of domestic solid waste generation in districts of istanbul with support vector regression(Institute of Electrical and Electronics Engineers Inc., 2020-10-12) Özçelik, Şuayb Talha; Tek, Faik BorayWaste planning is essential for large and developing cities such as Istanbul. In this report, we perform data analysis on "Waste Amount Based on District, Year and Waste Type"dataset shared by Istanbul Metropolitan Municipality. After analyzing the waste of the districts, we used support vector regression (SVR) to forecast the waste amounts for the coming years. The analysis has shown an overall increasing trend in the waste generation, although it dropped in 2019. The SVR predicts that the most waste generating district will be Küçükçekmece in the coming years.Yayın Intracity price dispersion: evidence from Istanbul(Zonguldak Bülent Ecevit Üniversitesi, 2017-10-01) İnanç Tunçer, ÖzlemThe existence of price dispersion is one of the most well known principles of economic theory. Earlier studies concentrated on international purchasing power parity (PPP) deviations. In recent years several studies have examined price dispersion within a nation’s borders. In this article the price dispersion among the districts of Istanbul is analyzed by utilizing a data set containing microeconomic price levels from bazaars, convenience stores, and supermarkets. According to results of the study, the prices of homogenous products, except fruit and vegetables, vary less than the prices of differentiated goods as one might expect. Results also indicate that, type of the seller of the product effects price dispersion among the counties of Istanbul.Yayın Rum Architects and their Domed Greek Orthodox Churches that marked the change in the physical features of Istanbul(Atatürk Üniversitesi, 2022-03-28) Şarlak, EvangeliaThe cosmopolitan characteristic of Istanbul, expresses itself clearly not only in the political, economic and social domains but also in that of architecture, the traces left by different cultures and creeds. With the Non-Muslim Regulation issued after the conquest of Istanbul, it is stated that Christian and Jewish communities can live their religious lives freely. While the architectural activities continue within the determined rules, the construction of the dome and the lead coating of the dome are prohibited within the framework of these rules. With the Tanzimat Edict of 1839, non-Muslim Ottomans were granted equal rights with Muslims, Concrete steps were taken with the 1856 Reform Edict . On this date, with the permission given for the construction of new churches and domes, domed churches began to be built in Istanbul.Yayın The impact of the COVID-19 pandemic on online grocery supply chain management: a case study in Istanbul(Gazi Üniversitesi, 2024-03) Javadi, Sonya; Keten, Olcay; Özer, Ali İhsan; Alkan, Remziye ZeynepThe COVID-19 pandemic has already crippled normal life all over the world. Its negative impact not only changed the human health system tragically but also disrupted the global economic system. One negative result was ended up in the global food supply chain. As the lockdown times have suspended the manufacturing and logistic activities, therefore, the customers have experienced unimaginable chaos in the shopping markets. Moreover, the purchasing habit of the consumers has remarkably changed compared to pre-pandemic. To meet this new demand pattern, many grocery retailers have tried to adapt to the new normal. While before COVID-19 offline grocery purchasing was popular, after the pandemic, online service got tremendous attention in market. In this study, online grocery supply chain management during the COVID-19 in Istanbul is considered. The aim is to find out how online grocery companies will serve more efficiently during the pandemics and which factors have more effect on the customer’s satisfaction. To do so, first, three popular grocery retailers in Istanbul were selected. Then, a related survey was designed to understand the consumer experience as doing online grocery shopping in COVID-19. Unsurprisingly, a result shows that 60% of the respondents did online shopping every 3-4 days in one week, and the delivery time is the most important factor for the customers. Then, the SWOT analyses were performed accordingly, and the related strategies were summarized. Finally, several managerial implications were given to may improve the company’s online services in COVID-19 and post COVID-19 in Turkey.
