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
Website
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Sustainable Development Goals
1NO POVERTY
0
Research Products
2ZERO HUNGER
0
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3GOOD HEALTH AND WELL-BEING
0
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4QUALITY EDUCATION
1
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5GENDER EQUALITY
0
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6CLEAN WATER AND SANITATION
0
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7AFFORDABLE AND CLEAN ENERGY
0
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8DECENT WORK AND ECONOMIC GROWTH
0
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9INDUSTRY, INNOVATION AND INFRASTRUCTURE
0
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10REDUCED INEQUALITIES
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11SUSTAINABLE CITIES AND COMMUNITIES
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12RESPONSIBLE CONSUMPTION AND PRODUCTION
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13CLIMATE ACTION
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14LIFE BELOW WATER
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15LIFE ON LAND
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16PEACE, JUSTICE AND STRONG INSTITUTIONS
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17PARTNERSHIPS FOR THE GOALS
0
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Documents
40
Citations
251
h-index
9
Documents
17
Citations
37
Scholarly Output
19
Articles
9
Views / Downloads
40/34
Supervised MSc Theses
0
Supervised PhD Theses
0
WoS Citation Count
57
Scopus Citation Count
68
Patents
0
Projects
0
WoS Citations per Publication
3.00
Scopus Citations per Publication
3.58
Open Access Source
3
Supervised Theses
0
| Journal | Count |
|---|---|
| Journal of Vısual Communıcatıon And Image Representatıon | 2 |
| 2012 20th Signal Processing and Communications Applications Conference, SIU 2012, Proceedings | 1 |
| 2013 21st Signal Processing and Communications Applications Conference, SIU 2013 | 1 |
| 2013 21St Sıgnal Processıng And Communıcatıons Applıcatıons Conference (Sıu) | 1 |
| 2015 Internatıonal Conference on Optıcal Network Desıgn And Modelıng (Ondm) | 1 |
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19 results
Scholarly Output Search Results
Now showing 1 - 10 of 19
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 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.Article Citation - WoS: 4Citation - Scopus: 5Exploring visual dictionaries: A model driven perspective(Academic Press Inc Elsevier Science, 2017) Aslan, Sinem; Akgul, Ceyhun Burak; Sankur, Bulent; Tunali, E. TurhanGood representative dictionaries is the most critical part of the BoVW: Bag of Visual Words scheme, used for such tasks as category identification. The paradigm of learning dictionaries from datasets is by far the most widely used approach and there exists a plethora of methods to this effect. Dictionary learning methods demand abundant data, and when the amount of training data is limited, the quality of dictionaries and consequently the performance of BoVW methods suffer. A much less explored path for creating visual dictionaries starts from the knowledge of primitives in appearance models and creates families of parametric shape models. In this work, we develop shape models starting from a small number of primitives and develop a visual dictionary using various nonlinear operations and nonlinear combinations. Compared with the existing model-driven schemes, our method is able to represent and characterize images in various image understanding applications with competitive, and often better performance.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.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.Article Citation - WoS: 6Citation - Scopus: 5Adaptive, Incentive and Scalable Dynamic Tree Overlay for P2p Live Video Streaming(Springer, 2016) Sayit, Muge; Demirci, Sercan; Kaymak, Yagiz; Tunali, E. TurhanIn this paper, we propose a new multicast tree framework to be used in peer-to-peer (P2P) live video streaming systems. The proposed system, adapts the tree links under high peer churn and runs in a totally distributed manner. In order to provide this dynamism and seamless streaming at the same time, we propose a cross layer design involving scalable video codec, backup parents and hierarchical clusters. The performance of the system is measured in real world environment PlanetLab that has nodes distributed all over the world. The experiments show that the proposed system provides high quality of experience (QoE) in terms of Peak Signal to Noise Ratio (PSNR), playback delay and duration of pauses. The proposed system also provides incentive mechanism to its users.Article Citation - WoS: 9Citation - Scopus: 10Resilient Peer-To Streaming of Scalable Video Over Hierarchical Multicast Trees With Backup Parent Pools(Elsevier, 2012) Fesci-Sayit, Muge; Tunali, E. Turhan; Tekalp, A. MuratThis paper introduces a new cross layer tree-based peer-to-peer design using hierarchical cluster layers and a new method for selection of backup parent pools for resilient streaming of scalable video to provide highest quality of experience for all peers. Backup parent pools are selected during the process of multicast tree construction based on information provided by the hierarchical clusters. The proposed tree construction method aims to minimize bottlenecks that may be caused by non-leaf nodes with low upload bandwidth. Performance of the proposed system is demonstrated by extensive test results using a wide range of simulation scenarios. Comparison of the results with those of some recent works indicates that the proposed system is clearly superior in several aspects. (C) 2011 Elsevier B.V. All rights reserved.Conference Object Citation - Scopus: 2A Dynamic Line Rate Assignment Strategy for Mlr Wdm Optical Networks(Institute of Electrical and Electronics Engineers Inc., 2018) Algin G.B.; Tunalı, TurhanIn this study, we propose a new dynamic line rate assignment strategy that responds to load intensity fluctuations of daily traffic in wavelength-division-multiplexed (WDM) mixed-line-rate (MLR) optical networks. We present Survivable Routing with Rate and Wavelength Assignment (SRRWA) and we propose an efficient shared backup path protection solution for dynamic traffic model. We prepared simulation scenarios to demonstrate the effect of handling load intensity periods over routing performance in terms of communication cost and resource utilization. We compared the results of the proposed strategy with static line rate assignment methods. The simulation results show that proposed strategy has an average performance while highest resource utilization and lowest cost values are obtained by the static rate matching line rate assignment method. © 2017 IEEE.Article Citation - WoS: 1Citation - Scopus: 1Optimal Backup Parent Pools for Resilient Multicast Trees on Peer-To Networks(Tubitak Scientific & Technical Research Council Turkey, 2015) Tunali, Emrullah Turhan; Sayit, MugeDue to churn as well as node and link failures in peer-to-peer (P2P) networks, providing resilient multicast is a challenging issue, particularly for overlay trees. In this work, we first study analytical properties of the backup parent pool that aims at improving the resilience of overlay multicast trees in P2P video streaming. We then present a novel greedy degree-constrained multicast tree construction algorithm that addresses the tradeoffs between maximizing resiliency, maximizing bandwidth utilization, and minimizing delay. The choice of essential design parameters is studied together with seamlessness of the streaming under a variety of fault scenarios. Simulation results indicate that the overhead introduced by the mechanism is negligible if there is sufficient bandwidth in the system. Both analytic and simulation results indicate that the proposed approach improves resiliency, bandwidth utilization, and delay. Comparisons with an algorithm from the literature are carried out and it is observed that the proposed method is superior under a wide range of conditions.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.