Browsing by Author "Dağ, Hasan"
Now showing items 21-40 of 52
-
The impact of text preprocessing on the prediction of review ratings
Işık, Muhittin; Dağ, Hasan (Tubitak, 2020)With the increase of e-commerce platforms and online applications, businessmen are looking to have a rating and review system through which they can easily reveal the feelings of customers related to their products and ... -
Implementation of a SDN (Software defined network)
Ergen, Mithat Sinan; Kutlan, Sarp; Dağ, Tamer; Dağ, Hasan (International Institute of Informatics and Systemics IIIS, 2014)Improving resource efficiency enhancing network security and achieving simpler network management have become the main goals for networking in the previous years. To accomplish these ideas an efficient routing traffic ... -
Improving Item-Based Recommendation Accuracy with User's Preferences on Apache Mahout
Jabakji, Ammar; Dağ, Hasan (IEEE, 2016)Recommendation systems play a critical role in the Information Science application domain especially in e-commerce ecosystems. In almost all recommender systems statistical methods and machine learning techniques are used ... -
Improving the quality of recommender systems in e-commerce platforms
Işık, Muhittin (Kadir Has Üniversitesi, 2021)Especially Covid-19 pandemic process, which has taken the world by storm, has shed a clear light on the place of e-commerce, which is already increasing its influence with the globalizing world, in the future world of ... -
Konutların Günlük Elektrik Güç Tüketimi Tahmini İçin Uygun Model Seçimi
Çayır, Aykut; Dağ, Hasan (Fırat Üniv. Fen Bilimleri Enst., 2018)Zamana bağlı değişim gösteren olayların modellenmesi zorlu bir veri analizi problemidir. Bu olaylardan biri olan elektrik güç tüketiminde ise veriden mevsimsel etki ve tatil günleri gibi örüntülerin öğrenilerek bir ... -
Machine learning model to predict an adult learner's decision to continue ESOL course
Dahman, Mohammed R.; Dağ, Hasan (Springer, 2019)This study investigated the ability of the demographic and the affective variables to predict the adult learners' decision to continue ESOL courser. 278 adult learners, enrolled on ESOL course at FLS institution in Istanbul, ... -
.Net yazılım çerçevesi kullanılarak KOBİ'lere özel bütçe sisteminin geliştirilmesi
Cesur, Kazım (Kadir Has Üniversitesi, 2012)Bu tezin amacı piyasada çeşitli yollar ile yapılan bütçe uygulamalarına alternatif olarak modern bir yöntem ile kobilerin bütçe yapmalarına olanak sağlamaktır.Bu yöntem, .NET Framework yazılım çerçevesinde bulunan VB.NET ... -
A New Preconditioner Design Based on Spectral Division for Power Flow Analysis
Dağ, Hasan; Yetkin, E. Fatih; Manguoglu, Murat (Praise Worthy Prize Srl, 2011)Solution of large sparse linear systems is the most lime consuming part in many power system simulations. Direct solvers based on LU factorization although robust are known to have limited satiability on parallel platforms. ... -
On the selection of ınterpolation points for rational Krylov Methods
Yetkin, E. Fatih; Dağ, Hasan (Springer-Verlag Berlin, 2012)We suggest a simple and an efficient way of selecting a suitable set of interpolation points for the well-known rational Krylov based model order reduction techniques. To do this some sampling points from the frequency ... -
On-Line Transient Stability Assessment Using Matlab Parallel Programming Environment
Soykan, Gürkan; Dağ, Hasan (IEEE, 2010)Transient Stability Assessment (TSA) is the major part of Dynamic Security Assessment (DSA) in an electric power system. On-line TSA has gained more importance for power system security in last two decades. The decreasing ... -
Öykü anlatıcısı olarak karakter : tek kişilik bir destan uyarlamasında anlatıcı
Şahal, Süleyman (Kadir Has Üniversitesi, 2017)in credit scoring statistical methods like logistic regression have been successfully used for years. in the last two decades several data mining algorithms have gained popularity and proved themselves to be useful in ... -
Parallel Contingency Analysis Using Differential Evolution Based Solution For Branch Outage Problem
Ceylan, Oğuzhan; Dağ, Hasan; Özdemir, Aydoğan (IEEE, 2010)Contingency analysis is one of the most fundamental work an electricity management center operator has to perform regularly. If both bus voltage magnitudes and reactive power flowing on the branches during any type of ... -
Parallel Implementation Of Iterative Rational Krylov Methods For Model Order Reduction
Yetkin, E. Fatih; Dağ, Hasan (IEEE, 2010)Model order reduction (MOR) techniques are getting more important in large scale computational tasks like large scale electronic circuit simulations. In this paper we present some experimental work on multiprocessor systems ... -
Parallel implementation of iterative rational Krylov methods for model order reduction
Yetkin, Emrullah Fatih; Dağ, Hasan (IEEE, 2009)Model order reduction (MOR) techniques are getting more important in large scale computational tasks like large scale electronic circuit simulations. In this paper we present some experimental work on multiprocessor systems ... -
Parallel-in-space implementation of transient stability analysis on a Linux cluster with infiniband
Soykan, Gürkan; Flueck, Alexander J.; Dağ, Hasan (IEEE, 2012)On-line transient stability analysis is an inevitable way to provide real time power system security and control. Parallel computing is one of the most viable ways to perform on-line transient stability analysis. This paper ... -
The performance wise comparison of the most widely used noSQL databases
Aladily, Ahmed (Kadir Has Üniversitesi, 2015)This work deals with the comparison of the most widely used noSQL databases. Chapter one deals in great details with the SQL databases and the noSQL databases including characteristics and the four types of noSQL databases, ... -
Post outage bus voltage calculations for double branch outages
Ceylan, Oğuzhan; Ozdemir, Aydogan; Dağ, Hasan (IEEE, 2012)Secure operation of electrical power systems is vital hence fast and accurate post-outage state calculations are important for contingency analysis. Contingency analysis includes simulations of both the single and double ... -
Post-outage state estimations for outage management
Ceylan, Oğuzhan; Ozdemir, Aydogan; Dağ, Hasan (IFAC Secretariat, 2011)Real time outage information is required to the utility operators for outage management process. In addition to some basic information regarding the outage post-outage system status will help to improve the response to ... -
Power consumption estimation using in-memory database computation
Alamin, Mohamed (Kadir Has Üniversitesi, 2016)Son elektrik tüketimini tahmin etmek amacıyla, hız ve güvenilirliği artırmak gerekir. hız ile ilgili olarak, birçok kat daha hızlı HDD den veri manipüle sağlar en iyi çözümdür IN-Bellek veritabanını kullanır. Bu amaçla, ... -
Power flow using thread programming
Dağ, Hasan; Soykan, Gürkan (2011)Power flow problem which is one of the most important applications in power system is solved using OpenMP Application Program Interface (API) a thread based programming technique for the shared memory programming environments. ...