This paper presents a new software library in which there are several novel studies proposed on S... more This paper presents a new software library in which there are several novel studies proposed on Steganography. Library is implemented with an object oriented programming language enabling its users to add new methods easily. The efficiency of the methods implemented in the library is also presented in this paper.
The difficulties encountered in the management of distributed systems have led to the prominence ... more The difficulties encountered in the management of distributed systems have led to the prominence of research in the area of policy-based management. In this paper we present a framework for specifying and managing policies in a policy life cycle. In conjunction with a policy ...
2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577), 2004
POLICE [T. Dursun and B. Orencik, 2003] is a novel policy based management framework composed of ... more POLICE [T. Dursun and B. Orencik, 2003] is a novel policy based management framework composed of a policy specification language and its deployment models for distribution of policies. In this paper we present distributed policy conflict detection model employed in POLICE policy framework. POLICE model is designed to handle application domain-specific conflicts [E. Lupu and M. Sloman, 1999] only, whereas
2007 IEEE Workshop on Signal Processing Systems, 2007
In many digital image/video processing applications resolution 1 enhancement naturally arises as ... more In many digital image/video processing applications resolution 1 enhancement naturally arises as a problem of high practical value. Typically, increasing spatial resolution through modifications in the imaging system is not a feasible option, and post-processing algorithms designed to enhance resolution of the acquired image/video signal prove beneficial. In this work, we analyze recent work on pixel classification based resolution enhancement,
... (3) At the end of stage 9, each PE writes the result data of its stage 9 into the dual port R... more ... (3) At the end of stage 9, each PE writes the result data of its stage 9 into the dual port RAM on the auxiliary ... Vo112 No 4 (May 1988) pp 1019 10 Jagadish, N, Kumar, JM and Patnaik, ML 'An efficient scheme for interprocessor communication using dualported RAMs' IEEE Micro ...
The AdEPar (Advanced Educational Parallel) integrated simulation and implementation environment f... more The AdEPar (Advanced Educational Parallel) integrated simulation and implementation environment for Digital Signal Processing (DSP) has been designed and implemented to serve as a test-bed for various scheduling, simulation, and code generation problems as well as a real-time implementation tool for DSP algorithms that could be mapped onto the proposed parallel pipelined architecture. The integrated environment fully exploits all types of concurrency present in DSP algor ithms and addresses practical issues such as processor and memory constraints, architec tural features of DSP processors in the target architectures, debugging of parallel programs, and development of high-level programming environments. The AdEPar software DSP environment is based on object-oriented programming techniques. Because DSP computation objects and graphics objects of AdEPar are separated from each other carefully, the software system portability is guaranteed. This programming approach saves time and eff...
In many digital image/video processing applications resolution 1 enhancement naturally arises as ... more In many digital image/video processing applications resolution 1 enhancement naturally arises as a problem of high practical value. Typically, increasing spatial resolution through modifications in the imaging system is not a feasible option, and post-processing algorithms designed to enhance resolution of the acquired image/video signal prove beneficial. In this work, we analyze recent work on pixel classification based resolution enhancement, namely, resolution synthesis, and discuss its applicability to low complexity customer grade display systems. In the light of our observations, we point out certain short-comings of resolution synthesis, and propose a modified scheme to improve its performance under certain conditions. We present an FPGA implementation of the proposed algorithm, and provide a computational complexity analysis. The resulting hardware design is tested for a standards conversion application where 480Ã720 progressive frames are scaled to 720Ã1280 progressive at...
ABSTRACT Underwater Acoustic Sensor Network (UASN) is the enabling technology for real-time under... more ABSTRACT Underwater Acoustic Sensor Network (UASN) is the enabling technology for real-time underwater monitoring and data collection. The costly underwater trials and unknown underwater acoustic modem infrastructures increase the need and importance of a reliable network simulator for UASNs. The underwater acoustic propagation method used in the channel modeling is the one of the determining factors influences the reliability level of the network simulator for UASNs. However, recent models implemented in popular open-source network simulators prefer to use empirical formulas due to the computational complexity of the propagation method for inclusion. This preference means neglecting the multipath, fading, and shadow zone effects. Disregarding these effects results in unreal communication links between sensor nodes and approximate propagation loss and delay computation. In this paper, we present the design and implementation of our underwater acoustic channel model developed to eliminate the multipath, fading, and shadow zone effects by using ray tracing propagation method in the ns-2 network simulator. We also compare our model with a previously proposed model. The results show that the considerable differences in spreading loss and propagation delay occur due to the approximation.
Many electronic voting systems, classified mainly as homomorphic cryptography based, mix-net base... more Many electronic voting systems, classified mainly as homomorphic cryptography based, mix-net based and blind signature based, appear after the eighties when zero knowledge proofs were introduced. The common ground for all these three systems is that none of them works without real time cryptologic calculations that should be held on a server. As far as known, the agent-based approach has not been used in a secure electronic voting system. In this study, an agent-based electronic voting schema, which does not contain real time calculations on the server side, is proposed. Conventional cryptologic methods are used in the proposed schema and some of the requirements of an electronic voting system are constructed within the schema. The schema seems quite secure if the used cryptologic methods and agents are secure. In this paper, proposed schema will be explained and compared with already known electronic voting systems. Keywords—Electronic voting, E-voting, Mobile software agents, Offl...
Many electronic voting systems, classified mainly as homomorphic cryptography based, mix-net base... more Many electronic voting systems, classified mainly as homomorphic cryptography based, mix-net based and blind signature based, appear after the eighties when zero knowledge proofs were introduced. The common ground for all these three systems is that none of them works without real time cryptologic calculations that should be held on a server. As far as known, the agent-based approach has not been used in a secure electronic voting system. In this study, an agent-based electronic voting schema, which does not contain real time calculations on the server side, is proposed. Conventional cryptologic methods are used in the proposed schema and some of the requirements of an electronic voting system are constructed within the schema. The schema seems quite secure if the used cryptologic methods and agents are secure. In this paper, proposed schema will be explained and compared with already known electronic voting systems. Keywords—Electronic voting, E-voting, Mobile software agents, Offl...
Wireless Local Area Networks (WLANs) provide costeffectiveness and flexibility to the network and... more Wireless Local Area Networks (WLANs) provide costeffectiveness and flexibility to the network and provide mobility to the network users. However, there are potential problems due to wireless communications and applied security protocols. In this paper, the security mechanisms and protocols for wireless local area networks; WEP and IEEE 802.11i are mentioned, and the security problems related to WLAN are discussed. WLAN attacking experiments has shown that unconscious WLAN management and unconscious usage of WLAN devices cause a great security hazard in the network. The new security protocol for WLANs, IEEE 802.11i protects the network from such security problems.
This paper presents a new software library in which there are several novel studies proposed on S... more This paper presents a new software library in which there are several novel studies proposed on Steganography. Library is implemented with an object oriented programming language enabling its users to add new methods easily. The efficiency of the methods implemented in the library is also presented in this paper.
The difficulties encountered in the management of distributed systems have led to the prominence ... more The difficulties encountered in the management of distributed systems have led to the prominence of research in the area of policy-based management. In this paper we present a framework for specifying and managing policies in a policy life cycle. In conjunction with a policy ...
2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577), 2004
POLICE [T. Dursun and B. Orencik, 2003] is a novel policy based management framework composed of ... more POLICE [T. Dursun and B. Orencik, 2003] is a novel policy based management framework composed of a policy specification language and its deployment models for distribution of policies. In this paper we present distributed policy conflict detection model employed in POLICE policy framework. POLICE model is designed to handle application domain-specific conflicts [E. Lupu and M. Sloman, 1999] only, whereas
2007 IEEE Workshop on Signal Processing Systems, 2007
In many digital image/video processing applications resolution 1 enhancement naturally arises as ... more In many digital image/video processing applications resolution 1 enhancement naturally arises as a problem of high practical value. Typically, increasing spatial resolution through modifications in the imaging system is not a feasible option, and post-processing algorithms designed to enhance resolution of the acquired image/video signal prove beneficial. In this work, we analyze recent work on pixel classification based resolution enhancement,
... (3) At the end of stage 9, each PE writes the result data of its stage 9 into the dual port R... more ... (3) At the end of stage 9, each PE writes the result data of its stage 9 into the dual port RAM on the auxiliary ... Vo112 No 4 (May 1988) pp 1019 10 Jagadish, N, Kumar, JM and Patnaik, ML 'An efficient scheme for interprocessor communication using dualported RAMs' IEEE Micro ...
The AdEPar (Advanced Educational Parallel) integrated simulation and implementation environment f... more The AdEPar (Advanced Educational Parallel) integrated simulation and implementation environment for Digital Signal Processing (DSP) has been designed and implemented to serve as a test-bed for various scheduling, simulation, and code generation problems as well as a real-time implementation tool for DSP algorithms that could be mapped onto the proposed parallel pipelined architecture. The integrated environment fully exploits all types of concurrency present in DSP algor ithms and addresses practical issues such as processor and memory constraints, architec tural features of DSP processors in the target architectures, debugging of parallel programs, and development of high-level programming environments. The AdEPar software DSP environment is based on object-oriented programming techniques. Because DSP computation objects and graphics objects of AdEPar are separated from each other carefully, the software system portability is guaranteed. This programming approach saves time and eff...
In many digital image/video processing applications resolution 1 enhancement naturally arises as ... more In many digital image/video processing applications resolution 1 enhancement naturally arises as a problem of high practical value. Typically, increasing spatial resolution through modifications in the imaging system is not a feasible option, and post-processing algorithms designed to enhance resolution of the acquired image/video signal prove beneficial. In this work, we analyze recent work on pixel classification based resolution enhancement, namely, resolution synthesis, and discuss its applicability to low complexity customer grade display systems. In the light of our observations, we point out certain short-comings of resolution synthesis, and propose a modified scheme to improve its performance under certain conditions. We present an FPGA implementation of the proposed algorithm, and provide a computational complexity analysis. The resulting hardware design is tested for a standards conversion application where 480Ã720 progressive frames are scaled to 720Ã1280 progressive at...
ABSTRACT Underwater Acoustic Sensor Network (UASN) is the enabling technology for real-time under... more ABSTRACT Underwater Acoustic Sensor Network (UASN) is the enabling technology for real-time underwater monitoring and data collection. The costly underwater trials and unknown underwater acoustic modem infrastructures increase the need and importance of a reliable network simulator for UASNs. The underwater acoustic propagation method used in the channel modeling is the one of the determining factors influences the reliability level of the network simulator for UASNs. However, recent models implemented in popular open-source network simulators prefer to use empirical formulas due to the computational complexity of the propagation method for inclusion. This preference means neglecting the multipath, fading, and shadow zone effects. Disregarding these effects results in unreal communication links between sensor nodes and approximate propagation loss and delay computation. In this paper, we present the design and implementation of our underwater acoustic channel model developed to eliminate the multipath, fading, and shadow zone effects by using ray tracing propagation method in the ns-2 network simulator. We also compare our model with a previously proposed model. The results show that the considerable differences in spreading loss and propagation delay occur due to the approximation.
Many electronic voting systems, classified mainly as homomorphic cryptography based, mix-net base... more Many electronic voting systems, classified mainly as homomorphic cryptography based, mix-net based and blind signature based, appear after the eighties when zero knowledge proofs were introduced. The common ground for all these three systems is that none of them works without real time cryptologic calculations that should be held on a server. As far as known, the agent-based approach has not been used in a secure electronic voting system. In this study, an agent-based electronic voting schema, which does not contain real time calculations on the server side, is proposed. Conventional cryptologic methods are used in the proposed schema and some of the requirements of an electronic voting system are constructed within the schema. The schema seems quite secure if the used cryptologic methods and agents are secure. In this paper, proposed schema will be explained and compared with already known electronic voting systems. Keywords—Electronic voting, E-voting, Mobile software agents, Offl...
Many electronic voting systems, classified mainly as homomorphic cryptography based, mix-net base... more Many electronic voting systems, classified mainly as homomorphic cryptography based, mix-net based and blind signature based, appear after the eighties when zero knowledge proofs were introduced. The common ground for all these three systems is that none of them works without real time cryptologic calculations that should be held on a server. As far as known, the agent-based approach has not been used in a secure electronic voting system. In this study, an agent-based electronic voting schema, which does not contain real time calculations on the server side, is proposed. Conventional cryptologic methods are used in the proposed schema and some of the requirements of an electronic voting system are constructed within the schema. The schema seems quite secure if the used cryptologic methods and agents are secure. In this paper, proposed schema will be explained and compared with already known electronic voting systems. Keywords—Electronic voting, E-voting, Mobile software agents, Offl...
Wireless Local Area Networks (WLANs) provide costeffectiveness and flexibility to the network and... more Wireless Local Area Networks (WLANs) provide costeffectiveness and flexibility to the network and provide mobility to the network users. However, there are potential problems due to wireless communications and applied security protocols. In this paper, the security mechanisms and protocols for wireless local area networks; WEP and IEEE 802.11i are mentioned, and the security problems related to WLAN are discussed. WLAN attacking experiments has shown that unconscious WLAN management and unconscious usage of WLAN devices cause a great security hazard in the network. The new security protocol for WLANs, IEEE 802.11i protects the network from such security problems.
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Papers by Bülent Örencik