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Browsing Fakülteler / Faculties by Subject "Computer Science"

Now showing items 21-37 of 105

A Robust Watermarking Method for Mpeg-4 Based on Kurtosis

Murat Yesilyurt; Yildiray Yalman; Özcerit, Ahmet Turan (OXFORD UNIV PRESS, 2015)

Watermarking is a method of data hiding in relation to information security and copyright protection. In this paper, a new kurtosis-based watermarking approach is proposed for compressed video files. The proposed approach ...
Ab initio Hartree-Fock calculations on linear and second-order nonlinear optical properties of new acridine-benzothiazolylamine chromophores

Avcı, Davut; Atalay, Yusuf; Cömert, Hüseyin (SPRINGER, 2008)

The calculation of optimized molecular structure and molecular hyperpolarizability of four new acridine-benzothiazolylamine chromophores (1-4) [2-nitro-6-(piperid-1-yl) acridine (1), 6-(benzothiazol-2-yl-amino)-2-nitro-acridine ...
American sign language recognition using multi-dimensional hidden Markov models

Öz, Cemil (INST INFORMATION SCIENCE, 2006)

An American Sign Language (ASL) recognition system developed based on multidimensional Hidden Markov Models (HMM) is presented in this paper. A Cyberglove (TM) sensory glove and a Flock of Birdso motion tracker are used ...
An Adaptive Neural Network Control Scheme for Stabilizing Chaos to the Stable Fixed Point

Kursad Gokce; Uyaroğlu, Yılmaz (KAUNAS UNIV TECHNOLOGY, 2017)

A neural network control scheme with a novel adaptive learning rate is proposed to stabilize the chaotic trajectory of the chaotic system to a stable fixed point. A new approach is proposed to determine the stability of ...
An Analysis and Comparison of Adoption of E-learning Systems in Higher Education by Lecturers at Largest Universities in Estonia and Turkey

Fatih Gullu; Rein Kuusik; Kazbulat Shogenov; Mart Laanpere; Yusuf Oysal; Omer Faruk Sozcu; Parlak, Zekeriya (UNIV LATVIA, 2016)

In this study, for the first time, we analysed and compared adoption of e-learning by lecturers in three largest universities in Estonia and Turkey. Total number of students and academic staff in the Estonian universities ...
An application of fuzzy clustering to manufacturing cell design

Torkul, Orhan; Cedimoğlu, İsmail Hakkı (IOS PRESS, 2006)

There are several methods and techniques for manufacturing cell design. Many clustering techniques have focused on operations that have been made on part-machine matrix. Some methods have used array-based techniques while ...
An application of fuzzy clustering to manufacturing cell design

Torkul, Orhan; Cedimoğlu, İsmail Hakkı (IOS PRESS, 2006)

There are several methods and techniques for manufacturing cell design. Many clustering techniques have focused on operations that have been made on part-machine matrix. Some methods have used array-based techniques while ...
An Empirical Assessment of Customer Lifetime Value Models within Data Mining

Hızıroğlu, Abdulkadir; Merve Sisci; Cebeci, Halil İbrahim; Seymen, Ömer Faruk (UNIV LATVIA, 2018)

Customer lifetime value has been of significant importance to marketing researchers and practitioners in specifying the importance level of each customer. By means of segmentation which could be carried out using value-based ...
An entropy-based algorithm for data elimination in time-driven software instrumentation

Özmen, Ahmet (ELSEVIER SCIENCE INC, 2009)

While monitoring, instrumented long running parallel applications generate huge amount of instrumentation data. Processing and storing this data incurs overhead, and perturbs the execution. A technique that eliminates ...
An exponential jerk system, its fractional-order form with dynamical analysis and engineering application

; Karthikeyan Rajagopal; Akgül, Akif; Sajad Jafari; Anitha Karthikeyan; Çavuşoğlu, Ünal; Kaçar, Sezgin (SPRINGER, 2020)

A simple jerk system with only one exponential nonlinearity is proposed and discussed. Dynamic analysis of the integer-order jerk system shows the existence of chaotic oscillations. A model for the fractional-order jerk ...
Analysis of cross-price effects on markdown policies by using function approximation techniques

Kula, Ufuk (ELSEVIER SCIENCE BV, 2013)

Markdown policies for product groups having significant cross-price elasticity among each other should be jointly determined. However, finding optimal policies for product groups becomes computationally intractable as the ...
Artificial bee colony algorithm solution for optimal reactive power flow

Ayan, Kürşat; Kilic, Ulas (Elsevier Science BV, 2012)

Artificial bee colony (ABC) algorithm is an optimization algorithm based on the intelligent foraging behavior of honeybee swarm. Optimal reactive power flow (ORPF) based on ABC algorithm to minimize active power loss in ...
Automatic detection of respiratory arrests in OSA patients using PPG and machine learning techniques

Uçar, Muhammed Kürşad; Bozkurt, Mehmet Recep; Bilgin, Cahit; Kemal Polat (SPRINGER, 2017)

Obstructive sleep apnea is a syndrome which is characterized by the decrease in air flow or respiratory arrest depending on upper respiratory tract obstructions recurring during sleep and often observed with the decrease ...
Automatic detection of respiratory arrests in OSA patients using PPG and machine learning techniques

Uçar, Muhammed Kürşad; Bozkurt, Mehmet Recep; Bilgin, Cahit; Kemal Polat (SPRINGER, 2017)

Obstructive sleep apnea is a syndrome which is characterized by the decrease in air flow or respiratory arrest depending on upper respiratory tract obstructions recurring during sleep and often observed with the decrease ...
Automatic sleep staging in obstructive sleep apnea patients using photoplethysmography, heart rate variability signal and machine learning techniques

Bozkurt, Mehmet Recep; Bilgin, Cahit; Kemal Polat (SPRINGER, 2018)

It is extremely significant to identify sleep stages accurately in the diagnosis of obstructive sleep apnea. In the study, it was aimed at determining sleep and wakefulness using a practical and applicable method. For this ...
Automatic sleep staging in obstructive sleep apnea patients using photoplethysmography, heart rate variability signal and machine learning techniques

Bozkurt, Mehmet Recep; Bilgin, Cahit; Kemal Polat (SPRINGER, 2018)

It is extremely significant to identify sleep stages accurately in the diagnosis of obstructive sleep apnea. In the study, it was aimed at determining sleep and wakefulness using a practical and applicable method. For this ...
Building an interconnection between PROFIBUS and ATM networks

Özçelik, İbrahim; Ekiz, Hüseyin (ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2007)

In this paper, a method describing connection between PROcess Field BUS (PROFIBUS) and asynchronous transfer mode (ATM) systems is presented. The proposed method reveals the usage of ATM at the cell level of the CIM ...