ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia最新文献

EWA: An exemplar-based watermarking attack EWA:一种基于范例的水印攻击

ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia Pub Date : 2011-11-14 DOI: 10.1109/ICIMU.2011.6122766

A. Taherinia, M. Jamzad

引用次数: 2

Adaptive resource allocation scheme for uplinks in IEEE 802.16 systems IEEE 802.16系统中上行链路的自适应资源分配方案

ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia Pub Date : 2011-11-01 DOI: 10.1109/ICIMU.2011.6122735

N. Tahir, K. A. Noordin

引用次数: 2

Performance analysis of coded-OFDM with RS-CC and Turbo codes in various fading environment RS-CC和Turbo码编码ofdm在各种衰落环境下的性能分析

ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia Pub Date : 2011-11-01 DOI: 10.1109/ICIMU.2011.6122750

A. Joshi, D. Saini

{"title":"Performance analysis of coded-OFDM with RS-CC and Turbo codes in various fading environment","authors":"A. Joshi, D. Saini","doi":"10.1109/ICIMU.2011.6122750","DOIUrl":"https://doi.org/10.1109/ICIMU.2011.6122750","url":null,"abstract":"In wireless communication, to attain high throughput and better transmission quality. Orthogonal Frequency Division Multiplexing (OFDM) is one of the techniques for parallel transmission. It is used for a various services such as asymmetric digital subscriber lines, very-high speed digital subscriber lines, digital video and audio broadcasting, and wide local area network standards such as IEEE 802.11a, IEEE 802.11g, and European telecommunication standard institute (ETSI). However in fading environments the bit error rate (BER) increases. The performance can be improved by using some kind of channel coding. This form of OFDM is called coded-OFDM (COFDM). In this paper our aim is to analyze and compare the performance of COFDM using Turbo codes {with Log-MAP (Maximum A Posteriori) decoding} and Reed Solomon (RS) code with 1/2 and 2/3 convolution codes (CC) as channel coding techniques in Rayleigh, Rician & Nakagami fading environments. The performance parameter is BER and the mapping schemes used are BPSK, QPSK, 16-QAM and 64-QAM. All other parameters are as per IEEE 802.11a specifications.","PeriodicalId":102808,"journal":{"name":"ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126809839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20

Intelligent routing protocol for Multimedia Sensor networks 多媒体传感器网络的智能路由协议

ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia Pub Date : 2011-11-01 DOI: 10.1109/ICIMU.2011.6122747

A. Nayyar, F. Bashir, Ubaid-Ur-Rehman, Z. Hamid

引用次数: 5

Improved bully election algorithm in distributed systems 分布式系统中改进的欺凌选举算法

ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia Pub Date : 2011-11-01 DOI: 10.1109/ICIMU.2011.6122724

Abbas Arghavani, E. Ahmadi, A. Haghighat

引用次数: 20

Algorithm analyzer to check the efficiency of codes 算法分析器，检查代码的效率

ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia Pub Date : 2011-11-01 DOI: 10.1109/ICIMU.2011.6122740

T. A. Alvar, R. Atan

引用次数: 2

Searching & ranking Learning Objects in a Service Oriented Architecture for e-learning 面向服务的电子学习体系结构中学习对象的搜索与排序

ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia Pub Date : 2011-11-01 DOI: 10.1109/ICIMU.2011.6122745

L. Soo, E. Yeoh, S. Ho

{"title":"Searching & ranking Learning Objects in a Service Oriented Architecture for e-learning","authors":"L. Soo, E. Yeoh, S. Ho","doi":"10.1109/ICIMU.2011.6122745","DOIUrl":"https://doi.org/10.1109/ICIMU.2011.6122745","url":null,"abstract":"This paper proposes a revised architecture for Service Oriented Architecture (SOA) e-learning system to enhance the reusability of the Learning Objects (LOs) by providing a personalized recommendation model (searching and ranking processes) which is having a shorter processing time, comparing with other approaches. The model counts the similarity degree between the learning objects and the search conditions given by users. The LOs with higher similarity degrees will then be ranked by referring to user's preference history records. Those LOs which are more closed with the user's preference record will be ranked higher in the search result list. The preference record is stored in database to record the details of LOs which are selected by user in the past. As the literature review, some different existing approaches based on recommendation models have been analyzed and compared with each other. Among those existing model, some approaches are focusing on personalized recommendation, while some approaches are focusing on improving the efficiency of the searching and ranking processes. Our contribution is to propose an idea of a recommendation model that is personalized and at the same time, the model should have a shorter processing time. Prototype system will be implemented in future to show the contribution.","PeriodicalId":102808,"journal":{"name":"ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131810659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Fast Backpropagation Neural Network algorithm for reducing convergence time of BPNN image compression 减少bp神经网络图像压缩收敛时间的快速反向传播神经网络算法

ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia Pub Date : 2011-11-01 DOI: 10.1109/ICIMU.2011.6122720

Omaima N. A. Al-Allaf

{"title":"Fast Backpropagation Neural Network algorithm for reducing convergence time of BPNN image compression","authors":"Omaima N. A. Al-Allaf","doi":"10.1109/ICIMU.2011.6122720","DOIUrl":"https://doi.org/10.1109/ICIMU.2011.6122720","url":null,"abstract":"Artificial neural networks (ANNs) especially Backpropagation Neural Network (BPNN) was used largely in image processing. The backpropagation neural network algorithm (BP) was used for training the BPNN for image compression/decompression. The BP requires long time to train the BPNN with small error. Therefore, in this research, a three layered BPNN was designed for building image compression system. The Fast backpropagation neural network algorithm (FBP) was used for training the designed BPNN to reduce the training time (convergence time) of BPNN as possible as. Many techniques were used to improve the use of FBP for BPNN training. This is done by using different architecture of BPNN by changing the number of input layer neurons and number of hidden layer neurons. Also we trained the BPNN with different FBP parameters. Finally, FBP results such as compression ratio (CR) and peak signal to noise ratio (PSNR) are computed and compared with BP results. From the results, we noticed that the use of FBP improve the BPNN training by reducing the convergence time of image compression learning process.","PeriodicalId":102808,"journal":{"name":"ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128952157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20

Fast retransmission mechanism and end to end QoS support for VoIP applications over IEEE 802.11e WLANs 快速重传机制和端到端QoS支持VoIP应用在IEEE 802.11e wlan

ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia Pub Date : 2011-11-01 DOI: 10.1109/ICIMU.2011.6122773

M. F. Tuysuz, H. A. Mantar

{"title":"Fast retransmission mechanism and end to end QoS support for VoIP applications over IEEE 802.11e WLANs","authors":"M. F. Tuysuz, H. A. Mantar","doi":"10.1109/ICIMU.2011.6122773","DOIUrl":"https://doi.org/10.1109/ICIMU.2011.6122773","url":null,"abstract":"Real-time applications such as VoIP, video-conference or online games are delay-sensitive multimedia applications and require relatively small delay and small delay variation. Recently, IEEE 802.11 WLANs have reached an important stage and have become a common technology for wireless access due to its low cost, ease of deployment and mobility support. Its new standard, EDCA, has the ability to accommodate real-time traffic and provide relatively small delay. However, it cannot achieve small delay variation due to the burst feature of its backoff mechanism after a collision or a frame error. Since the real-time services such as Voice over IP (VoIP) has a delay constraint to guarantee a QoS, a fast retransmission scheme for corrupted frames is required. In this paper, we propose a new fast retransmission mechanism for VoIP frames to reduce the delay and delay variation. Then, we integrate our scheme with an Adaptive Jitter Buffer (AJB) algorithm to optimize end-to-end QoS performance. Simulation results indicate that proposed fast retransmission scheme reduces not only delay, delay variation and dropping probability of frames, but it also helps the AJB to support QoS maintaining voice quality at high level on EDCA-based WLANs.","PeriodicalId":102808,"journal":{"name":"ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128733349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Emergence of social intelligence in social network: A quantitative analysis for agent-mediated PKM processes 社会网络中社会智力的出现:对代理介导的PKM过程的定量分析

ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia Pub Date : 2011-11-01 DOI: 10.1109/ICIMU.2011.6122717

S. Ismail, M. S. Ahmad

{"title":"Emergence of social intelligence in social network: A quantitative analysis for agent-mediated PKM processes","authors":"S. Ismail, M. S. Ahmad","doi":"10.1109/ICIMU.2011.6122717","DOIUrl":"https://doi.org/10.1109/ICIMU.2011.6122717","url":null,"abstract":"Social intelligence has been coined by authors in many aspects, with one of them being the sociability characteristics of a software agent in performing tasks over social network. This concept has been expanded from personal knowledge management (PKM) frameworks using agent mediation, where intelligent agents are assigned with tasks to assist their human counterparts. In recent studies, PKM processes are understood to be a series of getting knowledge, analysing/understanding knowledge, sharing/publishing knowledge and connecting to others for knowledge over the Internet and social network. The critical issue of this concept involves identifying and ‘locating’ knowledge experts for further enlightenment of one's personal knowledge. Taking into considerations the advantages of social network and the similarities between PKM processes and Nonaka's SECI model, the emergence of social intelligence are investigated in this paper by analysing the responses from a questionnaire survey on PKM processes over the social network. This paper also discusses the limitations of this research vis-à-vis the current situation where e-mail is still seen as the only reliable way to manage personal knowledge. It then recommends future works in the realm of social intelligence, involving software agents.","PeriodicalId":102808,"journal":{"name":"ICIMU 2011 : Proceedings of the 5th international Conference on Information Technology & Multimedia","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129101866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22