Selcuk Demiray

Displaying 1-4 of 4 results

  • White Papers // Oct 2012

    Transfer Learning in Vehicle Routing Problem for Rapid Adaptation

    Vehicle routing problem is a transportation optimization problem in trans-porting stuffs from depot(s) to receivers via vehicle(s) having limited capacity. There are a lot of different problem types in VRP literature with different problem parameters. No VRP method uses past solutions to solve current problems more quickly and to find...

    Provided By Selcuk Demiray

  • White Papers // Jul 2012

    A Novel Hybrid Approach to Estimating Missing Values in Databases Using K-Nearest Neighbors and Neural Networks

    Missing values in datasets and databases can be estimated via statistics, ma-chine learning and artificial intelligence methods. This paper uses a novel hybrid neural network and weighted nearest neighbors to estimate missing values and provides good results with high performance. In this work, four different characteristic datasets were used and...

    Provided By Selcuk Demiray

  • White Papers // Sep 2009

    Towards Usable Solutions to Graphical Password Hotspot Problem

    Click based graphical passwords that use background images suffer from hot-spot problem. Previous graphical password schemes based on recognition of images do not have a sufficiently large password space suited for most Internet applications. In this paper, the authors propose two novel graphical password methods based on recognition of icons...

    Provided By Selcuk Demiray

  • White Papers // Mar 2009

    Graphical Passwords as Browser Extension: Implementation and Usability Study

    Today, most Internet applications still establish user authentication with traditional text based passwords. Designing a secure as well as a user-friendly password-based method has been on the agenda of security researchers for a long time. On one hand, there are password manager programs which facilitate generating site-specific strong passwords from...

    Provided By Selcuk Demiray

  • White Papers // Oct 2012

    Transfer Learning in Vehicle Routing Problem for Rapid Adaptation

    Vehicle routing problem is a transportation optimization problem in trans-porting stuffs from depot(s) to receivers via vehicle(s) having limited capacity. There are a lot of different problem types in VRP literature with different problem parameters. No VRP method uses past solutions to solve current problems more quickly and to find...

    Provided By Selcuk Demiray

  • White Papers // Jul 2012

    A Novel Hybrid Approach to Estimating Missing Values in Databases Using K-Nearest Neighbors and Neural Networks

    Missing values in datasets and databases can be estimated via statistics, ma-chine learning and artificial intelligence methods. This paper uses a novel hybrid neural network and weighted nearest neighbors to estimate missing values and provides good results with high performance. In this work, four different characteristic datasets were used and...

    Provided By Selcuk Demiray

  • White Papers // Sep 2009

    Towards Usable Solutions to Graphical Password Hotspot Problem

    Click based graphical passwords that use background images suffer from hot-spot problem. Previous graphical password schemes based on recognition of images do not have a sufficiently large password space suited for most Internet applications. In this paper, the authors propose two novel graphical password methods based on recognition of icons...

    Provided By Selcuk Demiray

  • White Papers // Mar 2009

    Graphical Passwords as Browser Extension: Implementation and Usability Study

    Today, most Internet applications still establish user authentication with traditional text based passwords. Designing a secure as well as a user-friendly password-based method has been on the agenda of security researchers for a long time. On one hand, there are password manager programs which facilitate generating site-specific strong passwords from...

    Provided By Selcuk Demiray