Browsing by Author "Öğrenci, Arif Selçuk"

Now showing items 1-4 of 4

  • Ekonomi haberlerinin BIST100 ve hisse senetlerinin fiyat değişimleri üzerindeki etkisinin incelenmesi 

    Authors:Özer, Engin
    Publisher and Date:(Kadir Has University, 2015)
    Bu çalışmada ilk olarak, ekonomi haberlerinin belli bir kaynaktan toplanması, Bag-of-Words (ön tanımlı kelime grupları) yöntemi ile pozitif ve negatif olarak ayrıştırılması için bir yazılım geliştirilmiştir. Daha sonra bu ayrıştırma işleminin başarı oranı ele alınmıştır. İstanbul Borsası endeksindeki hareketlerin pozitif-negatif haberlerden ne kadar etkilendiği ve ileri yönelik tahmin yapılıp yapılamayacağı incelenerek bu gözlemlere dayalı bir portföy yönetim stratejisi önerilmiştir. Literatürde ...

  • A hybrid deep learning framework for unsupervised anomaly detection in multivariate spatio-temporal data 

    Authors:Karadayı, Yıldız; Aydın, Mehmet Nafiz; Öğrenci, Arif Selçuk
    Publisher and Date:(MDPI AG, 2020)
    Multivariate time-series data with a contextual spatial attribute have extensive use for finding anomalous patterns in a wide variety of application domains such as earth science, hurricane tracking, fraud, and disease outbreak detection. In most settings, spatial context is often expressed in terms of ZIP code or region coordinates such as latitude and longitude. However, traditional anomaly detection techniques cannot handle more than one contextual attribute in a unified way. In this paper, a ...

  • Secure loyalty cards in mobile 

    Authors:Veral, İbrahim Fırat
    Publisher and Date:(Kadir Has University, 2014)
    In this study, it is intended to develop a loyalty application by utilizing NFC technology, used by an increasing number of devices today, and QRCode, which has begun to be used in many sectors. It is aimed to collect all discount cards and mark cards taken from each company and safely use them. Barcode reading is performed for devices with an Android software and NFC support while card reading is performed devices without NFC by using QRCode. When the application is run; the barcode is scanned ...

  • Smart chatbot 

    Authors:Çifçi, Recep
    Publisher and Date:(Kadir Has University, 2018)
    Chatbot is an abbreviation of chat and robot. Nowadays, we can see ChatBot as the primitive state of artificial intelligence. Chatbot is an algorithm based on software that we can do some special work, chat and talk for fun. The emergence and implementation of the ChatBot idea begins with a theory of Alan Turing. The Turing test includes a user, a computer and a person which responding to this user. The computer and people answer the questions the user asks. If the user can not figure out which ...