• Methods to improve recommender systems in e-commerce and e-learning environments 

  Authors : Jabakji, Ammar
  Publisher and Date : (Kadir Has University, 2017)

  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 ...
  
  

• An Integrated Framework for Examining Innovation Alignment in Organizations 

  Authors : Dilan, Ebru; Aydin, Mehmet Nafiz
  Publisher and Date : (World Scientific Publishing Co. Pte Ltd, 2018)

  Innovation has been promoted as a panacea to solve the long-standing problem of how organizations deal with complexities associated with uncertainty and instability in ever changing environments. information systems (IS) ...
  
  

• A country-specific analysis on internet interconnection ecosystems 

  Authors : Cakmak, Gorkem; Aydin, Mehmet Nafiz
  Publisher and Date : (IEEE, 2018)

  With the proliferating number of diverse participants and destinations to reach the Internet construct has become more intricate to assay. Today Internet Service Providers (ISPs) establish resilient networks from multiple ...
  
  

• Protecting openflow switches against denial of service attacks 

  Authors : Bahaa-Eldin, Ayman M.; Eldessouky, Ebada Essam Eldin; Daǧ, Hasan
  Publisher and Date : (Institute of Electrical and Electronics Engineers Inc., 2018)

  This paper presents a novel approach to protect Openflow switches against a type of Denial of Service (DoS) attacks. Openflow switches are the core of Software Defined Networks (SDN) and they are very flexible programmable ...
  
  

• HeteroSim: Heterogeneous simulation framework 

  Authors : Dursun, Taner; Daǧ, Hasan
  Publisher and Date : (Association for Computing Machinery Inc, 2009)

  In order to arrange heterogeneous simulation executions it would be useful to have simulation tools that enable easy and fast creation of simulation sessions employing real-time software components beside simulation codes. ...
  
  

• Branch outage solution using particle swarm optimization 

  Authors : Ceylan, Oǧuzhan; Ozdemir, Aydogan; Daǧ, Hasan
  Publisher and Date : (2008)

  For post outage MW line flows and voltage magnitude calculations most of the methods use linear methods because of their simplicity. Especially for reactive power flow calculations one can face high errors. In this paper ...
  
  

• Optimization of mode in distribution electrical grid by using renewable energy sources for rural energy supply 

  Authors : Shokolakova, Shinar K.; Keshuov, Seitkazy A.; Saukhimov, Almaz A.; Tokhtibakiev, Karmel K.; Ceylan, Oǧuzhan; Shuvalova, Jelena
  Publisher and Date : (IAEME Publication, 2018)

  Kazakhstan plans to support integration of renewable energy sources (RES). For instance according to [12] until 2020 it is planned to connect 53 RES with a total value of 2000 MW. From those 53 RES most of them will be ...
  
  

• Towards faster branch outage simulations using simulated annealing and parallel programming 

  Authors : Ceylan, Oǧuzhan; Ozdemir, Aydogan; Daǧ, Hasan
  Publisher and Date : (IEEE, 2009)

  Contingency studies such as branch outage and generator outage are among important studies of energy management centers operations. Branch outage modeling on the other hand is one of the basic steps of post-outage state ...
  
  

• Parallel contingency analysis using differential evolution based solution for branch outage problem 

  Authors : Ceylan, Oǧuzhan; Daǧ, Hasan; Ozdemir, Aydogan
  Publisher and Date : (IEEE, 2009)

  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 ...
  
  

• On-line transient stability assessment using Matlab parallel programming environment 

  Authors : Soykan, Gürkan; Daǧ, Hasan
  Publisher and Date : (IEEE, 2009)

  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 ...
  
  

• Parallel implementation of iterative rational Krylov methods for model order reduction 

  Authors : Yetkin, Emrullah Fatih; Daǧ, Hasan
  Publisher and Date : (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 ...
  
  

• Guidelines for IT change management shown on an example in Turkey 

  Authors : Oberer, Birgit Juliana; Erkollar, Alptekin
  Publisher and Date : (International Business Information Management Association IBIMA, 2010)

  In today's highly technology driven competitive global markets the ability to adopt is the only guarantee of survival. Businesses need to show ability to enable a competitive edge by taking their products or services to ...
  
  

• A critical analysis of current legal developments on the political participation of minorities in Turkey 

  Authors : Akbulut, Olgun
  Publisher and Date : (2010)

  This is a follow-up article to the one published in the IJMGR half a decade ago (Vol. 12 2005). Although there have been domestic and international legal cases that are directly concerned with the political participation ...
  
  

• Gravitational search algorithm for post-outage bus voltage magnitude calculations 

  Authors : Ceylan, Oǧuzhan; Ozdemir, Aydogan; Daǧ, Hasan
  Publisher and Date : (2010)

  Branch outage problem is one of the key problems in power system security analysis. This paper solves branch outage problem using a bounded approach. Local constrained optimization problem in the bounded approach is solved ...
  
  

• A spectral divide and conquer method based preconditioner design for power flow analysis 

  Authors : Daǧ, Hasan; Yetkin, Emrullah Fatih
  Publisher and Date : (2010)

  Power system simulations most of the time require solution of a large sparse linear system. Traditional methods such as LU decomposition based direct methods are not suitable for parallelization in general. Thus Krylov ...
  
  

• Harmony search method based parallel contingency analysis 

  Authors : Ceylan, Oǧuzhan; Daǧ, Hasan; Ozdemir, Aydogan
  Publisher and Date : (2010)

  Power system security management is one of the key problems in power system analysis. Power system management center operators need to simulate contingencies as fast as possible and take the remedial actions in time. These ...
  
  

• Post-outage state estimations for outage management 

  Authors : Ceylan, Oǧuzhan; Ozdemir, Aydogan; Daǧ, Hasan
  Publisher and Date : (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 flow using thread programming 

  Authors : Daǧ, Hasan; Soykan, Gürkan
  Publisher and Date : (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. ...
  
  

• A preconditioner for transient stability time domain simulation 

  Authors : Soykan, Gürkan; Flueck, Alexander J.; Daǧ, Hasan
  Publisher and Date : (2011)

  Transient Stability analysis which is one of the most important tasks of power system dynamic security analysis determines the dynamic behaviour of the power system after a large disturbance. Differential and algebraic ...
  
  

• Semi-Centralized Control of Distributed Generation in Smart Grids 

  Authors : Ceylan, Oǧuzhan; Pisica, Ioana; Paudyal, Sumit
  Publisher and Date : (Institute of Electrical and Electronics Engineers Inc., 2018)

  This paper proposes a semi-centralized intelligent control approach for voltage regulation in distribution grids based on sensitivity calculations. The model checks the voltage magnitudes of each end of each lateral in the ...
  
  

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