Browsing Computer Science by Author "1"
Now showing items 41-60 of 232
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DAPNA: an architectural framework for data processing networks
Sözer, Hasan; Nouta, S.; Wombacher, A.; Perona, P. (Springer Science+Business Media, 2013)A data processing network is as a set of (software) components connected through communication channels to apply a series of operations on data. Realization and maintenance of large-scale data processing networks necessitate ... -
Darbe i̇şaretleri̇ i̇çi̇n aşırı-hızlı FPGA tabanlı eǧri̇ beti̇mlenmesi̇
Başaran, A.; Uğurdağ, Hasan Fatih; Akdoğan, T.; Güney, V. U.; Gören, S. (IEEE, 2012)Bu çalışmada anlatılan donanım 1.5 GHz Analog-Sayısal- Çevirici’den gelen darbe işaret dizisini işleyebilmekte ve darbe işaretlerini genlik, yükselme/düşme süresi ve varış zamanı parametreleriyle özetleyebilmektedir. Söz ... -
Deep reinforcement learning for acceptance strategy in bilateral negotiations
Razeghi, Yousef; Yavuz, Ozan; Aydoğan, Reyhan (TÜBİTAK, 2020)This paper introduces an acceptance strategy based on reinforcement learning for automated bilateral negotiation, where negotiating agents bargain on multiple issues in a variety of negotiation scenarios. Several acceptance ... -
Defect-aware nanocrossbar logic mapping through matrix canonization using two-dimensional radix sort
Gören, S.; Uğurdağ, Hasan Fatih; Palaz, O. (ACM, 2011-08)Nanocrossbars (i.e., nanowire crossbars) offer extreme logic densities but come with very high defect rates; stuck-open/closed, broken nanowires. Achieving reasonable yield and utilization requires logic mapping that is ... -
Defining architectural viewpoints for quality concerns
Tekinerdogan, B.; Sözer, Hasan (Springer Science+Business Media, 2011)A common practice in software architecture design is to apply architectural views to model the design decisions for the various stakeholder concerns. When dealing with quality concerns, however, it is more difficult to ... -
Design and implementation of a data stream management system with advanced complex event processing capabilities
Ölmezoğulları, Erdi (2013-06)The world has seen proliferation of data stream applications over the last years. These applications include computer network monitoring, Radio Frequency Identication (RFID)-based supply chain and traffic management systems, ... -
Design for ARINC 653 conformance: architecting independent validation of a safety-critical RTOS
Alptekin, A.; Yilmazer, Y.; Usug, U.; Koca, F.; İnçki, Koray (IEEE, 2014)The ARINC 653 specification not only provides a standard application programming interface for an RTOS, but also specifies how to validate an ARINC 653 based RTOS. ARINC 653 Part 3 Conformity Test Specification specifies ... -
Detection of malicious social bots: A survey and a refined taxonomy
Latah, Majd (Elsevier, 2020-08-01)Social hots represent a new generation of hots that make use of online social networks (OSNs) as command and control (C&C) channels. Malicious social hots have been used as tools for launching large-scale spam campaigns, ... -
DILAF: A framework for distributed analysis of large-scale system logs for anomaly detection
Astekin, M.; Zengin, H.; Sözer, Hasan (Wiley, 2019-02)System logs constitute a rich source of information for detection and prediction of anomalies. However, they can include a huge volume of data, which is usually unstructured or semistructured. We introduce DILAF, a framework ... -
Discovering frequent patterns to bootstrap trust
Şensoy, Murat; Yilmaz, B.; Norman, T. J. (Springer International Publishing, 2013)When a new agent enters to an open multiagent system, bootstrapping its trust becomes a challenge because of the lack of any direct or reputational evidence. To get around this problem, existing approaches assume the same ... -
A distributed approach for bitrate selection in HTTP adaptive streaming
Bentaleb, A.; Beğen, Ali Cengiz; Harous, S.; Zimmermann, R. (ACM, 2018)Past research has shown that concurrent HTTP adaptive streaming (HAS) players behave selfishly and the resulting competition for shared resources leads to underutilization or oversubscription of the network, presentation ... -
DNN-based speaker-adaptive postfiltering with limited adaptation data for statistical speech synthesis systems
Öztürk, M. G.; Ulusoy, O.; Demiroğlu, Cenk (IEEE, 2019)Deep neural networks (DNNs) have been successfully deployed for acoustic modelling in statistical parametric speech synthesis (SPSS) systems. Moreover, DNN-based postfilters (PF) have also been shown to outperform conventional ... -
Do not predict – Recompute! How value recomputation can truly boost the performance of invisible speculation
Sakalis, C.; Chowdhury, Z.; Wadle, S.; Aktürk, İsmail; Ros, A.; Sjalander, M.; Kaxiras, S.; Karpuzcu, U. (IEEE, 2021)Recent architectural approaches that address speculative side-channel attacks aim to prevent software from exposing the microarchitectural state changes of transient execution. The Delay-on-Miss technique is one such ... -
Dynamic load management for IMS networks using network function virtualization
Dandin, Kaan; Hokelek, I.; Karabulut Kurt, G. (IEEE, 2016)Network Function Virtualization (NFV) is utilized to simplfy the deployment and management of constantly evolving and highly complex networking services. In this paper, we propose a dynamic load management framework for ... -
E-Cube: multi-dimensional event sequence analysis using hierarchical pattern query sharing
Liu, M.; Rundensteiner, E.; Greenfield, K.; Gupta, C.; Wang, S.; Arı, İsmail; Mehta, A. (ACM, 2011-06-12)Many modern applications, including online financial feeds, tag-based mass transit systems and RFID-based supply chain management systems transmit real-time data streams. There is a need for event stream processing technology ... -
E-Cube: multi-dimensional event sequence processing using concept and pattern hierarchies
Liu, M.; Rundensteiner, E. A.; Greenfield, K.; Gupta, C.; Wang, S.; Arı, İsmail; Mehta, A. (IEEE, 2010)Many modern applications including tag based mass transit systems, RFID-based supply chain management systems and online financial feeds require special purpose event stream processing technology to analyze vast amounts ... -
Effect regulated projection of robot’s action space for production and prediction of manipulation primitives through learning progress and predictability based exploration
Bugur, S.; Öztop, Erhan; Nagai, Y.; Ugur, E. (IEEE, 2021-06)In this study, we propose an effective action parameter exploration mechanism that enables efficient discovery of robot actions through interacting with objects in a simulated table-top environment. For this, the robot ... -
Enabling difference-based dynamic partial self reconfiguration for large differences
Gören, S.; Özkurt, Ö.; Türk, Y.; Yıldız, A.; Uğurdağ, Hasan Fatih (IEEE, 2013)This paper presents a new Dynamic Partial Self Reconfiguration (DPSR) flow for Xilinx FPGAs. Leveraging the Xilinx FPGA Editor and PlanAhead tools, we provide two implementation approaches that enable partial reconfiguration ... -
Enhancing MPEG DASH performance via server and network assistance
Thomas, E.; Deventer, M.O. van; Stockhammer, T.; Beğen, Ali Cengiz; Famaey, J. (IEEE, 2017)MPEG-Dynamic Adaptive Streaming over HTTP (DASH) provides formats that are suitable to stream media content over HTTP. Typically, the DASH client adaptively requests small chunks of media based on the available bandwidth ... -
Evaluating software architecture erosion for PL/SQL programs
Altınışık, M.; Ersoy, E.; Sözer, Hasan (The ACM Digital Library, 2017)PL/SQL procedures are grouped into packages for providing modularity. These procedures are indirectly coupled due to their use of common database tables. We define a cohesion metric and cluster PL/SQL procedures based on ...
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