Browsing Computer Science by Author "Özyeğin University"
Now showing items 461-480 of 546
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Software UART: A use case for VSCPU worst-case execution time analyzer
Yıldız, A.; İskender, Deniz; Özlü, G.; Uğurdağ, Hasan Fatih; Aktemur, Tankut Barış; Gören, S. (IEEE, 2019)This paper presents our early results of the development of a Worst-Case Execution Time (WCET) analyzer for VSCPU by implementing a software UART system. Our WCET analyzer takes a C program as input and gives the time taken ... -
Solver agent: Towards emotional and opponent-aware agent for human-robot negotiation
Keskin, Mehmet Onur; Çakan, Umut; Aydoğan, Reyhan (International Foundation for Autonomous Agents and Multiagent Systems (IFAAMAS), 2021)Negotiation is one of the crucial processes for resolving conflicts between parties. In automated negotiation, agent designers mostly take opponent's offers and the remaining time into account while designing their strategies. ... -
Sorec: Self-organizing and resource efficient clustered blockchain network
Doğan, Orkun; Çakmakçı, Kübra Kalkan (Elsevier, 2023-09)With the emergence of Industry 4.0, the features of the technologies that are utilized in broad range of areas are obliged to change according to the new necessities. Especially, the network requirements have to be adopted ... -
Source behavior discovery for fusion of subjective opinions
Şensoy, Murat; Kaplan, L.; Mel, G. de; Gunes, Taha (IEEE, 2016)Information is at the center of decision making in many systems and use-cases. In cooperative or hostile environments, agents communicate their subjective opinions about various phenomenon. However, sources of these opinions ... -
A sparse matrix‐vector multiplication method with low preprocessing cost
Aktemur, Tankut Barış (Wiley, 2018-11-10)Sparse matrix-vector multiplication (SpMV) is a crucial operation used for solving many engineering and scientific problems. In general, there is no single SpMV method that gives high performance for all sparse matrices. ... -
Spectrum-based fault localization for diagnosing concurrency faults
Koca, Feyzullah; Sözer, Hasan; Abreu, R. (Springer Science+Business Media, 2013)Concurrency faults are activated by specific thread interleavings at runtime. Traditional fault localization techniques and static analysis fall short to diagnose these faults efficiently. Existing dynamic fault-localization ... -
Spending "quality"' time with the web video
Beğen, Ali Cengiz (IEEE, 2016)For consumers, watching video over the Web is the most popular way to access free and premium content on connected devices. The underlying technology -- HTTP adaptive streaming -- is straightforward; however, due to quality ... -
Spoofing attacks to i-vector based voice verification systems using statistical speech synthesis with additive noise and countermeasure
Özbay, Mustafa Caner; Khodabakhsh, Ali; Mohammadi, Amir; Demiroğlu, Cenk (IEEE, 2016)Even though improvements in the speaker verification (SV) technology with i-vectors increased their real-life deployment, their vulnerability to spoofing attacks is a major concern. Here, we investigated the effectiveness ... -
Spoofing voice verification systems with statistical speech synthesis using limited adaptation data
Khodabakhsh, Ali; Mohammadi, Amir; Demiroğlu, Cenk (Elsevier, 2017-03)State-of-the-art speaker verification systems are vulnerable to spoofing attacks using speech synthesis. To solve the issue, high-performance synthetic speech detectors (SSDs) for attack methods have been proposed recently. ... -
Staged development of robot skills: behavior formation, affordance learning and imitation
Ugur, E.; Nagai, Y.; Sahin, E.; Öztop, Erhan (IEEE, 2015-06)Inspired by infant development, we propose a three staged developmental framework for an anthropomorphic robot manipulator. In the first stage, the robot is initialized with a basic reach-and- enclose-on-contact movement ... -
Static analysis of multi-staged programs via unstaging translation
Choi, W.; Aktemur, Tankut Barış; Yi, K.; Tatsuta, M. (ACM, 2011)Static analysis of multi-staged programs is challenging because thebasic assumption of conventional static analysis no longer holds: the program text itself is no longer a fixed static entity, but rather a dynamically ... -
Statik ve dinamik analizler ile hesaplanan risklere dayalı olarak test modellerinin iyileştirilmesi
Şahin Gebizli, C.; Metin, D.; Sözer, Hasan (CEUR, 2015)Model bazlı test teknikleri, sistem kullanım modelinden test senaryolarının otomatik olarak oluşturulmasını sağlayarak verimliliği artırmaktadır. Prensip olarak sonsuz sayıda test senaryosu oluşturmak mümkündür; ancak bu ... -
Stream analytics and adaptive windows for operational mode identification of time-varying industrial systems
Khodabakhsh, Athar; Arı, İsmail; Bakır, M.; Alagoz, S. M. (IEEE, 2018-09-07)It is necessary to develop accurate, yet simple and efficient models that can be used with high-speed industrial data streams. In this paper, we develop a mode identification technique using stream analytics and show that ... -
Streaming multicast video over software-defined networks
Noghani, Kyoomars Alizadeh; Sunay, Mehmet Oğuz (IEEE, 2014)Many of the video streaming applications in today's Internet involve the distribution of content from a CDN source to a large population of interested clients. However, widespread support of IP multicast is unavailable due ... -
Studying green video distribution as a whole
Kara, B.; Simon, G.; Tuffin, B.; Vieron, J.; Beğen, Ali Cengiz (ACM, 2023-06-09)This paper highlights the current trends and the necessary research directions for achieving carbon-effective streaming services. Collaboration between the end-to-end delivery pipeline vendors is encouraged to design ... -
Subjective bayesian networks and human-in-the-loop situational understanding
Braines, D.; Thomas, A.; Kaplan, L.; Şensoy, Murat; Bakdash, J. Z.; Ivanovska, M.; Preece, A.; Cerutti, F. (Springer, 2018-03-21)In this paper we present a methodology to exploit human-machine coalitions for situational understanding. Situational understanding refers to the ability to relate relevant information and form logical conclusions, as well ... -
Successive refinement of models for model-based testing to increase system test effectiveness
Sahin Gebizli, C.; Sözer, Hasan; Ercan, Ali Özer (IEEE, 2016)Model-based testing is used for automatically generating test cases based on models of the system under test. The effectiveness of tests depends on the contents of these models. Therefore, we introduce a novel three-step ... -
Summary of an effective formulation of the multi-criteria test suite minimization problem
Özener, Okan Örsan; Sözer, Hasan (IEEE, 2022)This is an extended abstract of the article: Okan Orsan Ozener and Hasan Sozer, 'An Effective Formulation of the Multi-Criteria Test Suite Minimization Problem', published in the Journal of Systems and Software, Vol. 168, ... -
Supervising topic models with Gaussian processes
Kandemir, Melih; Kekeç, T.; Yeniterzi, Reyyan (Elsevier, 2018-05)Topic modeling is a powerful approach for modeling data represented as high-dimensional histograms. While the high dimensionality of such input data is extremely beneficial in unsupervised applications including language ... -
A survey of decision support mechanisms for negotiation
Aydoğan, Reyhan; Jonker, C. M. (Springer, 2023)This paper introduces a dependency analysis and a categorization of conceptualized and existing economic decision support mechanisms for negotiation. The focus of our survey is on economic decision support mechanisms, ...
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