Tunalı, Turhan
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Tunali, E. Thrhan
Tunali, Emrullah Turhan
Tunali, E. Turhan
Tunali, Turhan
Tunalı, Emrullah Turhan
Tunali, Emrullah Turhan
Tunali, E. Turhan
Tunali, Turhan
Tunalı, Emrullah Turhan
Job Title
Email Address
turhan.tunali@ieu.edu.tr
Main Affiliation
05.05. Computer Engineering
Status
Current Staff
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ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Sustainable Development Goals
Documents
40
Citations
251
h-index
9
Documents
17
Citations
37
Scholarly Output
19
Articles
9
Views / Downloads
21/1138
Supervised MSc Theses
0
Supervised PhD Theses
0
WoS Citation Count
57
Scopus Citation Count
68
WoS h-index
4
Scopus h-index
5
Patents
0
Projects
0
WoS Citations per Publication
3.00
Scopus Citations per Publication
3.58
Open Access Source
3
Supervised Theses
0
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19 results
Scholarly Output Search Results
Now showing 1 - 10 of 19
Conference Object Citation - Scopus: 1Multicast Tree Based Video Streaming Application Over Planetlab(2011) Sayit M.; Demirci S.; Kaymak Y.; Bulut H.; Tunalı, TurhanIn this paper, a video streaming system running on multicast tree for peer to peer networks is presented and dynamic tree maintenance algorithm against node failures during streaming session is proposed. The proposed algorithm is tested on nodes existing in different countries over the Internet in Planetlab. The obtained results show that proposed algorithm can be used in latency sensitive live video streaming applications running on peer to peer networks. © 2011 IEEE.Conference Object Citation - WoS: 1Citation - Scopus: 1A Cost Efficient Line Rate Assignment Strategy for Mlr Wdm Optical Networks(IEEE, 2015) Algın, Gül Boztok; Tunali, E. TurhanRecent studies have shown that optical WDM networks with mixed line rate (MLR) support efficiently respond to diverse variety of traffic requirements having different service demands. In MLR WDM optical networks, an intelligent line rate selection strategy can enable cost efficient resource allocations for routing, rate and wavelength assignment problem. In this work, we propose a learning based line rate assignment strategy that reduces communication cost and bandwidth blocking ratio. Performances of three variations of the proposed strategy are compared with maximum and minimum line rate assignment strategies of the literature through simulations. Results show that performance can be improved with the proposed algorithm.Conference Object Citation - WoS: 1Citation - Scopus: 1An Efficient Jsd-Based Search on Interest-Based Hierarchical Clustering of Overlay Networks(Iaria Xps Press, 2010) Bulut, Hasan; Yardimci, Asil; Demirci, Sercan; Kaymak, Yagiz; Fesci-Sayit, Muge; Tunali, E. TurhanIn P2P networks, peers share contents, especially video files, which represent their interests. However, the underlying P2P topology may not represent this interest distribution. Thus, one important aspect of constructing an efficient P2P network is to exploit the interest similarity among peers. In this paper, we propose a hierarchical clustering mechanism for constructing an overlay network that takes interest similarity among peers into account. By measuring the similarity among interests of peers and clusters, interest-based hierarchical clusters are formed by using Jensen-Shannon Divergence metric. The clustering performance metrics, accuracy and correctness, are reported on PlanetLab. For limited keyword collections, a novel Jensen-Shannon Divergence-based search mechanism is implemented. It has been observed that the integrated mechanism provides an efficient method and better performance as compared to classical keyword-based search.Conference Object Educational Technology Eroding National Borders(2011) Siddiqui, Khalid Javed; Singh G.; Tunali T.Businesses are continuously forced to reeducate and train their new workforce before they can be productive. The existing employees also need to improve their skills or retrain for promotion/growth. To cater to this breed of students "schooling business" is also faced with an inescapable demand to design new programs/courses. The growth in educational technology is also influencing academic institutions to redefine their endeavors in terms of producing learning while providing instructions. With the growing demand for higher education such endeavors are crossing the physical boundaries of many countries. We are using online and hybrid learning models to attract traditional, distance and international students. A major component of this model is the web-based course management system that provides an environment for teaching/learning and interaction 24/7. This model optimally combines interactive-classroom, web-based lectures and traditional instructions and has successfully offered courses at SUNY-Fredonia with students registering from around the globe. This model is presented and the opportunities and challenges of web technologies in education are discussed. © 2011 Springer-Verlag.Conference Object Citation - WoS: 3Citation - Scopus: 3Dedicated Path Protection in Mixed-Line Optical Wdm Networks(IEEE, 2013) Algın, Gül Boztok; Tunali, E. TurhanAs data communication based internet usage increased; the need for high speed communication networks have emerged. Networks must service diverse variety of traffic requirements with different service demands. Recent studies have shown that optical WDM networks with MLR support efficiently respond to these requirements. In this study, we address the problem of survivable routing with wavelength and rate assignment (RWA) in MLR optical networks. A WDM MLR optical network with dedicated path protection scheme is designed and compared with SLR networks in terms of cost. Our results show that the usage of MLR property provides new opportunities and ease to solve RWA and survivability problems.Conference Object Joint Compressive Video Coding and Analysis With Hidden Markov Model Based Weighted Reconstruction(2013) Aslan S.; Tunalı, TurhanThis paper examines the performance of Hidden Markov Tree model based weights in reconstruction quality for an existing task-Aware compressive video coding system which aims object detection specifically. The existing system utilizes weights in reconstruction which are computed by tracking of the foreground object. The proposed system acquires similar average PSNR with the existing one which reported some improvement compared to the conventional unweighted reconstruction at low sampling rates. Furthermore, it is a little bit better than the existing system at higher sampling rates. It can be inferred from this study that Bayesian approaches that take account structural dependencies between transformation coefficients has the potential of improving reconstruction quality for such a compressive video coding system with object detection task. © 2013 IEEE.Article Citation - WoS: 2Citation - Scopus: 2A Comparative Path Establishment Study on Routing Performance of Mlr Wdm Optical Networks(Wiley, 2019) Algın, Gül Boztok; Tunali, Emrullah TurhanIn this paper, we investigate the effect of path establishment method priorities over routing performance in mixed line rate (MLR) wavelength division multiplexed (WDM) optical networks. The survivable routing with rate and wavelength assignment (SRRWA) problem is presented and an efficient shared backup path protection solution is proposed. We prepared detailed simulation scenarios with all possible prioritizations and observed their performances. The simulation results show that assigning higher priority to single hop methods as compared with multi-hop methods yields better performance. In both methods, it has been observed that assigning higher priority to grooming reduces the communication cost and the traffic blocking ratio while enhancing the resource utilization.Conference Object A Novel Study on Developing a Model-Driven Visual Dictionary(Institute of Electrical and Electronics Engineers Inc., 2016) Aslan S.; Akgul C.B.; Sankur B.; Tunalı, TurhanWe designed SymPaD framework, a model-driven visual dictionary construction and description method, with new shape models and quantized shape library. We demonstrate that, with this new design, the most current model-driven dictionary construction method is outperformed with even smaller dictionary in object recognition and image retrieval tasks. © 2016 IEEE.Conference Object Citation - Scopus: 1A Comparative Study of Compressed Sensing Video Encoding Gop Patterns for Stereo Distributed Video Coding(2012) Aslan S.; Tunalı, TurhanIn this study, compressed sensing concepts are applied to multi-view video coding. Existing work from single view video is utilized to develop efficient GOP patterns and reference framing for stereo coding. It has been observed that the most typical choice of pattern improved the characteristics 0.4 dB with respect to the model that do not benefit from interview sparsity for all frames. Alternatives for future work are proposed. © 2012 IEEE.Article Citation - WoS: 17Citation - Scopus: 20Scalable Video Encryption of H.264 Svc Codec(Academic Press Inc Elsevier Science, 2011) Algın, Gül Boztok; Tunalı, TurhanA new algorithm for encrypting H.264 SVC (Scalable Video Codec) video data is developed. Security requirements of encoded video are examined together with constraints arising from structural properties of the SVC software. Performance analysis of the new algorithm is reported and its strength against cryptanalysis attacks is discussed. It has been demonstrated that the new algorithm has almost no overhead with low level encryption and acceptable overhead for high level encryption that leads to totally unperceivable video. (C) 2011 Elsevier Inc. All rights reserved.