8 results on '"YILDIZ, Engin"'
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2. HEC-RAS 2B Modeli Kullanılarak Yazılıkaya Deresi (Nallıhan Ankara) Sel Tehlike Haritalarının Hazırlanması ve Sel Kontrol Yapısının Etkinliği.
- Author
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AKKUŞ, Hüseyin, YILDIZ, Engin, and BULUT, İsmail
- Abstract
Flooding is one of the natural disasters that occur with changes in meteorological conditions such as excessive precipitation and the rapid melting of snow. The major flooding formation factors are a region's topography, geological structure, climatic conditions, any deterioration in the natural structures of rivers, and uncontrolled urbanization. To reduce the risk of flooding, this study conducted river rehabilitation work within the water collection basin of the Yazılıkaya River, located within the borders of the Nallıhan District of Ankara Province. Furthermore, a mortared check dam was designed and implemented in an area of 78.8 hectares (Ha). The study of the Yazılıkaya River in-stream rehabilitation project included a two-dimensional flood model, which was carried out with the help of HEC-RAS software (Hydrologic Engineering Centers River Analysis System) using obtained data (stream maps, flow rates and art structure cross-sections) and the DSI Synthetic method with Q10 and Q100 flow rates. To analyze the effects of a mortared check dam on the Yazılıkaya River, the flow rate values of Q10 and Q100 in both heavy and sudden rains were used; it was observed that while the speed of the water was 2-3.2 m/sec before the construction of the dam, it decreased to 0.5 - 0.75 m/sec after construction. After the completion of the mortared check dam, it was calculated that there were water reductions of 2 and 8 cm respectively in the water depth analysis in the settlements made according to the Q10 and Q100 flow rates. Generally, this study investigated the effect of upper basin flood control structures (mortared check dam) and the regulation of precipitation water flow regimes (water energy, speed, depth, etc.), on flood hazard in populated settlements and on the highway. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
3. BİTKİ KÖKLERİNİN ŞEV ISLAHINDAKİ ROLÜ
- Author
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Yildiz, Engin
- Published
- 2020
- Full Text
- View/download PDF
4. THE VOCABULARY LEARNING STRATEGIES OF HIGH SCHOOL EFL LEARNERS
- Author
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YILDIZ, Engin and MİRİOGLU, Meryem
- Subjects
Vocabulary,vocabulary learning strategies - Abstract
In all schools inTurkey, English is a compulsory subject. Therefore, English is taught for twohours a week depending on the school type or grade. Since vocabulary is regardedas a crucial aspect in language learning, the purpose of the study is toinvestigate the vocabulary learning strategies adopted by 9th gradestudents, to find out which vocabulary learning strategies used most and theleast. Another purpose of this study is to find whether there were anydifferences between male and female learners regarding strategy use. 172 9thgrade students took part in this study and they were asked to fill in aquestionnaire of 25 vocabulary learning strategy items. Also, a semi-structuredinterview with ten students was held. The data was analyzed by using frequency,percentages, and means.The mostly usedstrategies were Social (Discovery) and Determination Strategies and the least onesare Social (Consolidation) and Metacognitive Strategies. No significantdifference of strategy use between female and male students was observed.However, when the strategy items were examined individually, slight differences were observed. The findingscontributed the teachers in terms of improving themselves and their studentsabout the instruction of VLSs and it also helped the teachers to selectappropriate course books and materials related with the strategy use of theirstudents.
- Published
- 2019
5. Yilmaz Güney's cinema in the popular cinema, art cinema and third cinema
- Author
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Yildiz, Engin, Serter, Sırrı Serhat, and Sinema Televizyon Anabilim Dalı
- Subjects
İletişim Bilimleri ,Communication Sciences - Abstract
Türk sinema tarihinde Yılmaz Güney ve onun filmleri, ülkemiz sinemasında önemli bir yere sahiptir. Yılmaz Güney, sinema hayatında birbirinden çok farklı sinema akımlarında filmler çekmiştir. Yılmaz Güney'in sineması incelendiğinde, filmlerini üç başlıkta toplamak mümkündür. Bu başlıklar Popüler Sinema, Sanat Sineması ve Üçüncü Sinema'dır. Çalışmada `Aç Kurtlar` (1969) filmi Popüler Sinema kapsamda değer-lendirilmektedir. Sanat Sineması örneklemi olarak `Umut` (1970) filmi incelenmektedir. `Duvar` (1983) filmi ise Üçüncü Sinema örneklemi çözümlenmektedir. Bu çalışmada, `Popüler Sinema, Sanat Sineması ve Üçüncü Sinema Ekseninde Yılmaz Güney Sine-ması` Güney'in hayatı ile birlikte bulunduğu dönemin koşullarıyla, kronolojik olarak ele alınıp incelenmektedir. Yılmaz Güney and his films have an important place in the history of Turkish cinema. Yılmaz Güney has made films in many different cinema movements. When Yılmaz Güney's cinema is analyzed, it is possible to collect his films under three titles. These titles are Popular Cinema, Art Cinema and Third Cinema. In this study, `Aç Kurtlar ` (1969) is evaluated in the context of Popular Cinema.`Umut` (1970) film is examined in the context of Art Cinema. `Duvar` (1983) is analyzed in the Third Cinema sample. In this study, Yılmaz Güney's Cinema İn The Popular Cinema, Art Cinema and Third Cinema. İt is examined and analyzed in chronological terms with the conditions of the period in which Güney lives. 144
- Published
- 2019
6. AVALANCHE MITIGATION MEASURES IN TURKEY CASE STUDY OF AYDER
- Author
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Yildiz, Engin
- Published
- 2018
- Full Text
- View/download PDF
7. Modelling effects of correlation in price competition
- Author
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Yildiz, Engin, Güllü, Ahmet Refik, and Endüstri Mühendisliği Anabilim Dalı
- Subjects
Endüstri ve Endüstri Mühendisliği ,Industrial and Industrial Engineering - Abstract
Firmalar mümkün olan en fazla karı elde etmek için ürünlerini veya hizmetlerini önceden belirlenmiş bir planla satmaya çalışırlar. Bunun için öncelikle ürün veya hizmetlerinin talep özelliklerini bilmelidirler. Genellikle, bir ürünün veya hizmetin pazar yapısı bir tekel değildir, yani, tipik bir ürün veya hizmetin satışında rekabet eden birkaç şirket vardır. Bu tür ortamlarda, müşterilerin belirli bir firmaya odaklanmak yerine tüm pazarı göz önünde bulundurarak seçimlerine karar vermeleri mümkündür. Bu göz önüne alındığında, sistemi daha iyi analiz etmek için farklı firmaların ürün veya hizmetlerinin talepleri arasındaki ilişki göz önünde bulundurulmalıdır. Bu çalışmada, piyasada müşterilerin ödeme istekliliği dağılımlarını kullanan basit bir talep modelinin varsayımı altında fiyat rekabeti incelendi. Model firmaların talepleri arasında korelasyon olmasına olanak vermektedir. Bu şekilde, talep modeli, firmaların hizmetleri arasındaki bağımlılıkları dikkate almaktadır. Öncelikle, modelin özellikleri ve rekabetin denge davranışları sunuldu. Ardından, firmaların talepleri için Gumbel'in iki değişkenli üstel dağılım (2. tipi) varsayımı altında rekabetin dinamiklerini araştırıldı. Firmaların fiyat kararları için benzersiz bir Nash dengesinin varlığını kanıtlandı. Belli koşullar altında, firmaların denge fiyatının tekel durumundaki optimum fiyattan daha yüksek olabileceği ortaya çıkmıştır. Ayrıca, merkezileşme ve ademi merkeziyete yönelik bazı karşılaştırmalı istatistikler sunulmaktadır. Sayısal örnekler farklı durumlar için sunulmuştur. Firms try to sell their products or services with a predetermined scheme to earn the most profit possible. For this, they first should know the demand characteristics of their product or service. Commonly, the market structure of a product or service is not a monopoly, that is, there are several firms competing on the sale of a typical product or service. In such environments, it is possible that customers decide on their choice considering the whole market instead of focusing on a particular firm. Having this in mind, one should consider the correlation between the demands of different firms' product or services to better analyze the system. In this study, we examine a price competition under the assumption of a simple demand model which utilizes willingness to pay distributions of the customers in the market. The model allows that the demands of the firms may be correlated. This way, the demand model takes into account the dependencies between the firms' services. We present the characteristics of the model and the equilibrium behavior of the competition. After, we investigate the dynamics of the competition under the assumption of Gumbel's bivariate exponential distribution (so-called Gumbel's Type 2) for the demands for the firms. We prove the existence of a unique Nash equilibrium for the price decisions of the firms. It turns out that under certain conditions, the equilibrium price of the firms may be higher than the monopoly case optimum price. Besides, some comparative statics for centralization and decentralization are presented. Numerical examples are presented for different cases. 80
- Published
- 2018
8. MERKEZİ VEZNE YER SEÇİMİ VE ATM ENVANTER YÖNETİM POLİTİKALARI İLE NAKİT YÖNETİM SİSTEMİ OPTİMİZASYONU.
- Author
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ÖZMEN, Müberra, TUNÇ, Sıdıka, YAĞIZ, Gamze, YILDIRIM, Selen, YILDIZ, Engin, KÖKSALAN, Murat, and GÜREL, Sinan
- Abstract
In this study, we consider location selection problem for central cash offices and cash management decisions for ATM's for İş Bank. Cash Management System involves the cash amounts held in ATM's, branches, central cash offices and cash transfers between central cash offices and ATMs or branches. Cash amount held in ATM's and branches affects the customer satisfaction and also, together with cash transfers, it costs considerable amount to the bank. Cash management system involves two sub problems. Those are selection of location for central cash offices, assignment of ATM's and branches to central cash offices, and determining cash management policies for ATM's. Those problems are discussed in steps, solution approaches are applied for Black Sea Region and results are discussed. The aim of this project is, under resource constraints, the optimization of the cash management system considering the related costs and customer satisfaction. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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