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Browsing Bilgisayar ve Bilişim Bilimleri Fakültesi by Author

Browsing Bilgisayar ve Bilişim Bilimleri Fakültesi by Author "Zengin, Ahmet"

Now showing items 1-20 of 21

A novel approach for strong S-Box generation algorithm design based on chaotic scaled Zhongtang system

Çavuşoğlu, Ünal; Zengin, Ahmet; Pehlivan, İhsan; Kaçar, Sezgin (SPRINGER, 2017)

Substitution Box (S-Box) is one of the most significant structures used to create an encryption which is strong and resistant against attacks in block encryption algorithms. S-Box plays an important role in data encryption. ...
A novel chaos-based encryption algorithm over TCP data packet for secure communication

Çavuşoğlu, Ünal; Akgül, Akif; Sezgin Kacar; Pehlivan, İhsan; Zengin, Ahmet (WILEY-HINDAWI, 2016)

In this article, a new algorithm that can encrypt data on TCP data segment by using a novel chaotic random number generator was developed. First of all, dynamic analyses of the chaotic system to be used were made and the ...
A novel defect prediction method for web pages using k-means plus

Muhammed Maruf Ozturk; Çavuşoğlu, Ünal; Zengin, Ahmet (PERGAMON-ELSEVIER SCIENCE LTD, 2015)

With the increase of the web software complexity, defect detection and prevention have become crucial processes in the software industry. Over the past decades, defect prediction research has reported encouraging results ...
A novel hybrid encryption algorithm based on chaos and S-AES algorithm

Çavuşoğlu, Ünal; Sezgin Kacar; Zengin, Ahmet; Ihsan Pehlivan (SPRINGER, 2018)

In this study, a novel chaos-based hybrid encryption algorithm design for secure and effective image encryption is presented. To design the algorithm, the Zhongtang chaotic system has been selected because of its rich ...
A survey on swarm intelligence based routing protocols in wireless sensor networks

Çelik, Fatih; Zengin, Ahmet; Tüncel, Sinan (ACADEMIC JOURNALS, 2010)

In the last decade, wireless sensor networks have attracted many researchers. One of the main topics adopted by researchers studying on wireless sensor networks is developing routing protocols for wireless systems. Routing ...
AN APPROACH FOR DESIGNING PASSIVE POWER FILTERS FOR INDUSTRIAL POWER SYSTEMS BY USING GRAVITATIONAL SEARCH ALGORITHM

Salih Tosun; Öztürk, Ali; M. Mustafa Ertay; Yalçın, Mehmet Ali; Zengin, Ahmet (UNIV OSIJEK, TECH FAC, 2015)

Harmonics are one of the important factors in determining the energy quality in power systems. Hence, eliminating or damping undesired harmonics is crucial in electrical power systems. Due to their low costs, Passive Power ...
ANALYSIS OF THE DISCONTINUOUS PWM CONTROLLED D-STATCOM FOR REACTIVE POWER COMPENSATION APPLICATIONS

Zengin, Ahmet (UNIV OSIJEK, TECH FAC, 2014)

The scope of this paper covers the investigations of discontinuous PWM (DPWM) control of the Distribution Static Synchronous Compensator (D-STATCOM). Various DPWM methods have been widely used in motor drives for controlling ...
Bee-MANET: A New Swarm-based Routing Protocol for Wireless Ad Hoc Networks

Zengin, Ahmet; Albayrak, Z (Kaunas Univ Technology, 2014)

Recently, mobile ad hoc networks (MANETs) have drawn attention by many researchers due to the development of portable devices and wireless network appliances have accounted for ad hoc networks. Many academic researchers ...
BeeWS: honeybee-inspired, large-scale routing protocol for wireless sensor networks (WSNs)

Zengin, Ahmet; Celik, Fatih (Inderscience Enterprises LTD, 2013)

Recently, scalable routing protocols using swarm intelligence (SI), which are designed and evolved for wireless sensor networks (WSNs), have become a research trend in literature. This paper presents an optimal method based ...
Design and implementation of a new MANET simulator model for AODV simulation

Sinan Tuncel; Ekiz, Hüseyin; Zengin, Ahmet (TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2016)

Distributed systems, such as ad hoc networks, are composed of nodes communicating with each other using underlying wireless technologies. Communication protocols, connection technologies, traffic flows, and routing algorithms ...
Discrete event modeling of swarm intelligence based routing in network systems

Zengin, Ahmet; Ekiz, Hüseyin (ELSEVIER SCIENCE INC, 2013)

Simulation remains attractive for performance and scalability analysis and/or design of networks. This paper presents a biologically inspired discrete-event modeling approach for simulating alternative computer network ...
Discrete event simulation-based performance evaluation of Internet routing protocols

Çelik, Fatih; Zengin, Ahmet; Çobanoğlu, Bülent (TUBITAK Scientific & Technical Research Council Turkey, 2013)

Evaluations of the proposed routing protocols are performed based on the metrics, such as the execution time, convergence time, turnaround time, throughput, and efficiency across an increasing size and complexity through ...
Formal verification and validation with DEVS-Suite: OSPF Case study

Zengin, Ahmet; Öztürk, Muhammed Maruf (Elsevier science BV, 2012)

In this paper, verification and validation of the DEVS models in DEVS-Suite environment are discussed. A case example called OSPF-DEVS simulator is applied and verification and validation tests are performed on it to show ...
How repeated data points affect bug prediction performance: A case study

Muhammed Maruf Ozturk; Zengin, Ahmet (ELSEVIER, 2016)

In defect prediction studies, open-source and real-world defect data sets are frequently used. The quality of these data sets is one of the main factors affecting the validity of defect prediction methods. One of the issues ...
Implementatıon of Devs Based Dıstrıbuted Network Sımulator For Large-Scale Networks

Zengin, Ahmet; Çobanoğlu, Bülent; Ekiz, Hüseyin; Çelik, Fatih; Kiraz, Alper (Daaam Internatıonal, 2014)

In this study, a tool was developed for design and implementation of a new discrete event based distributed simulation for large-scale networks. By using DEVS as a modelling approach, client / server based, scalable, ...
Large-Scale Integrated Network System Simulation with DEVS-Suite

Zengin, Ahmet (KSII-KOR SOC INTERNET INFORMATION, 2010)

Formidable growth of Internet technologies has revealed challenging issues about its scale and performance evaluation. Modeling and simulation play a central role in the evaluation of the behavior and performance of the ...
Leakage detection and localization on water transportation pipelines: a multi-label classification approach

Fatih Kayaalp; Zengin, Ahmet; Resul Kara; Sultan Zavrak (SPRINGER LONDON, 2017)

One of the main problems of water transportation pipelines is leak which can cause water resources loss, possible human injuries, and damages to the environment. There are many studies in the literature focusing on detection ...
Modeling discrete event scalable network systems

Zengin, Ahmet (ELSEVIER SCIENCE INC, 2011)

Scalability in simulation tools is one of the most important traits to measure performance of software. The reason is that today's Internet is the main instance of a large-scale and highly complex system. Simulation of ...
Real-time motion-sensitive image recognition system

Zengin, Ahmet (ACADEMIC JOURNALS, 2010)

This study aims at realizing an effective motion analysis for real time security application by using image processing techniques. After obtaining from the environment, image frames are used to sense and perceive a mobile ...
Secure image encryption algorithm design using a novel chaos based S-Box

Çavuşoğlu, Ünal; Kaçar, Sezgin; Pehlivan, İhsan; Zengin, Ahmet (PERGAMON-ELSEVIER SCIENCE LTD, 2017)

In this study, an encryption algorithm that uses chaos based S-BOX is developed for secure and speed image encryption. First of all, a new chaotic system is developed for creating S-Box and image encryption algorithm. Chaos ...