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NC-OFDM Cognitive Radio Wireless Networks with Efficient LDPC Codes 具有高效LDPC码的NC-OFDM认知无线网络
2013 23rd International Conference on Computer Theory and Applications (ICCTA) Pub Date : 2013-10-29 DOI: 10.1109/ICCTA32607.2013.9529693
Seif Shebl, A. Alwadie
{"title":"NC-OFDM Cognitive Radio Wireless Networks with Efficient LDPC Codes","authors":"Seif Shebl, A. Alwadie","doi":"10.1109/ICCTA32607.2013.9529693","DOIUrl":"https://doi.org/10.1109/ICCTA32607.2013.9529693","url":null,"abstract":"In this paper, a random Low-Density Parity-Check (LDPC) code is proposed for Noncontiguous Orthogonal Frequency Division Multiplexing (NC-OFDM) Cognitive Radio (CR) systems. Unlike other encoding schemes which achieve a system code rate of only 1/4 when half of the subcarriers are active, the proposed scheme achieves a system code rate of 1/2. The LDPC code is used to enhance the data transmission rate. A binary erasure channel (BEC) concatenated with an uncorrelated fading channel and AWGN channel model is adopted for NC-OFDM CR. Moreover, the adopted channel model is employed with density evolution algorithm to obtain good degree distribution pairs for the LDPC code. Thereafter, a modified shortest-path (MSP) algorithm is used to construct the parity-check matrix for the LDPC code. Simulations results show that the proposed LDPC code performs well in terms of both error rate and data transmission rate.","PeriodicalId":405465,"journal":{"name":"2013 23rd International Conference on Computer Theory and Applications (ICCTA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114157729","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: 0
Mapping User QoS requirements to Delay in Tree-based Clustered Wireless Sensor Networks 基于树的集群无线传感器网络中用户QoS需求到时延的映射
2013 23rd International Conference on Computer Theory and Applications (ICCTA) Pub Date : 2013-10-29 DOI: 10.1109/ICCTA32607.2013.9529700
W. Masri
{"title":"Mapping User QoS requirements to Delay in Tree-based Clustered Wireless Sensor Networks","authors":"W. Masri","doi":"10.1109/ICCTA32607.2013.9529700","DOIUrl":"https://doi.org/10.1109/ICCTA32607.2013.9529700","url":null,"abstract":"The tremendous advances in micro-technology and wireless communications has allowed a new generation of networks to emerge: Wireless Sensor Networks (WSN). While much effort is devoted to the development of several facets in WSN, QoS Support remains one of the least explored areas in this domain. In this paper, we present QoS support in WSN while highlighting the QoS mapping issue, a complex process in which QoS parameters are translated from level to level and we present a case study of a TDMA tree-based clustered WSN, where QoS requirements at the User level are mapped to delay at the Network level.","PeriodicalId":405465,"journal":{"name":"2013 23rd International Conference on Computer Theory and Applications (ICCTA)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128521037","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: 0
VoIP Performance Evaluation over IPv4-6 and 6to4 Networks 基于IPv4-6和6to4网络的VoIP性能评估
2013 23rd International Conference on Computer Theory and Applications (ICCTA) Pub Date : 2013-10-29 DOI: 10.1109/ICCTA32607.2013.9529707
Poussy A. Amr, Nashwa Abdelbaki
{"title":"VoIP Performance Evaluation over IPv4-6 and 6to4 Networks","authors":"Poussy A. Amr, Nashwa Abdelbaki","doi":"10.1109/ICCTA32607.2013.9529707","DOIUrl":"https://doi.org/10.1109/ICCTA32607.2013.9529707","url":null,"abstract":"IPv4 address space is exhausted. IETF developed IPv6 the new upgraded version from IPv4 to provide the continual increase of the IP address needs over the Internet. As the transition from IPv4 to IPv6 all over the Internet is slow, their coexistence is a must. 6to4 is used to transmit native IPv6 packets over IPv4 networks. Meanwhile, VoIP is also gaining momentum and expected to occupy considerable percentage of Internet traffic. In this paper, we measure the VoIP performance over 6to4 versus conventional IPv4 and IPv6 networks. The measurements are collected out of probing a single call in presence of HTTP, FTP or Voice traffic in the network background. Quality of Service elements as jitter, network delay, and throughput and packet loss percentage are measured. Also the call user satisfaction is assessed by Mean Opinion Score.","PeriodicalId":405465,"journal":{"name":"2013 23rd International Conference on Computer Theory and Applications (ICCTA)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123928210","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: 0
Identifying Learning Style Using Students Behavior in E-Learning Management Systems Based on JRIP Classifier 基于JRIP分类器的电子学习管理系统中使用学生行为识别学习风格
2013 23rd International Conference on Computer Theory and Applications (ICCTA) Pub Date : 2013-10-29 DOI: 10.1109/ICCTA32607.2013.9529382
S. M. Nafea, A. Hegazy, Essam-Eldean F. Elfakharany, M. E. Shehab
{"title":"Identifying Learning Style Using Students Behavior in E-Learning Management Systems Based on JRIP Classifier","authors":"S. M. Nafea, A. Hegazy, Essam-Eldean F. Elfakharany, M. E. Shehab","doi":"10.1109/ICCTA32607.2013.9529382","DOIUrl":"https://doi.org/10.1109/ICCTA32607.2013.9529382","url":null,"abstract":"in this paper, we introduce an adaptive mechanism that provides students with courses that fit their individual learning style. This mechanism helps in improving the learning process to obtain better results. The adaptive mechanism is based on an advanced student modeling approach which identifies learning styles as a way to predict students’ learning style from their past behavior that make learning easier for students and increase their learning progress. Datamining is really a multidisciplinary area focusing on methodologies for extracting valuable knowledge coming from students log files and there are many useful datamining methods to extract data. This knowledge can be used to increase the caliber of education and can be employed for selection making in educational process. It is applied on student’s previous performance data to generate the model that can be used to predict the student’s learning style to improve their performance. In this work a comparative study among nine different datamining techniques of classification in order to determine the best classifier to be used in predicting students learning style from their past behavior.","PeriodicalId":405465,"journal":{"name":"2013 23rd International Conference on Computer Theory and Applications (ICCTA)","volume":"273 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115955262","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: 0
Ontology-Based Approach for Automated Issue Classification in an Issue Tracking System 问题跟踪系统中基于本体的问题自动分类方法
2013 23rd International Conference on Computer Theory and Applications (ICCTA) Pub Date : 2013-10-29 DOI: 10.1109/ICCTA32607.2013.9529916
S. Fathalla, M. Ali, M. Kholief, Y. Hassan
{"title":"Ontology-Based Approach for Automated Issue Classification in an Issue Tracking System","authors":"S. Fathalla, M. Ali, M. Kholief, Y. Hassan","doi":"10.1109/ICCTA32607.2013.9529916","DOIUrl":"https://doi.org/10.1109/ICCTA32607.2013.9529916","url":null,"abstract":"A new ontology-based approach is presented for automated issue classification in an Issue Tracking System. An important and novel aspect of this approach is that the proposed fuzzy classification method does not require a training set, which is in contrast to the traditional statistical and probabilistic methods that require a set of pre-classified documents in order to train the classifier. Ontology is used as semantic knowledge representation for concept mapping and synonym extraction. The proposed approach is divided into three phases; Intelligent Pre-processing, Fuzzy Membership Calculation for the overall issue and finally Issue classification. Intelligent pre-processing is a new technique that does not blindly remove all stop words like traditional techniques but uses a concept tokenization rather than keyword tokenization. A set of ontologies were constructed for each domain of discourse for the Issue Tracking System (ITS) database. These ontologies are used to identify concepts and their relations for each domain that is appeared in the issue being processed. A Semantic Issue Tracking System - SIST - has been developed for applying this approach. The issue may be classified to more than one team with a degree of relevance depending on its semantic. Experiments show significant enhancement in issue classification over traditional Issue Tracking Systems.","PeriodicalId":405465,"journal":{"name":"2013 23rd International Conference on Computer Theory and Applications (ICCTA)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129977873","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: 0
Module Integrated Converter for Photovoltaic Applications with Different Control Strategies 采用不同控制策略的光伏组件集成变换器
2013 23rd International Conference on Computer Theory and Applications (ICCTA) Pub Date : 2013-10-29 DOI: 10.1109/ICCTA32607.2013.9529797
M. A. El-Geliel, M. Bakkar, M. A. Zied
{"title":"Module Integrated Converter for Photovoltaic Applications with Different Control Strategies","authors":"M. A. El-Geliel, M. Bakkar, M. A. Zied","doi":"10.1109/ICCTA32607.2013.9529797","DOIUrl":"https://doi.org/10.1109/ICCTA32607.2013.9529797","url":null,"abstract":"This paper presents the analysis of a multifunctional single phase multi stage grid connected photovoltaic system. Concentrates on the topology study of the photovoltaic module integrated converter’s in the power range below 500 W. Module integrated converter (MIC) technology has become a global trend in grid interactive PV applications and may assist in driving down the balance of system costs to secure an improved total system cost.In this paper fuzzy logic method is presented, MPPT using Fuzzy Logic Control has advantages of better performance, robust and simple design. In addition, this technique does not require the knowledge of the exact model of system and it can handle the nonlinearity. Modelling, controller design, simulation study of a grid connected PV system, and the overall configuration of the grid connected PV system is present.","PeriodicalId":405465,"journal":{"name":"2013 23rd International Conference on Computer Theory and Applications (ICCTA)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115965686","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: 1
Quality of Service for Slotted Optical Burst Switched Network 开槽光突发交换网络的服务质量
2013 23rd International Conference on Computer Theory and Applications (ICCTA) Pub Date : 2013-10-29 DOI: 10.1109/ICCTA32607.2013.9529577
Mohammed Abu-Ghayyad, Mohammed Mahmoud, M. Aly
{"title":"Quality of Service for Slotted Optical Burst Switched Network","authors":"Mohammed Abu-Ghayyad, Mohammed Mahmoud, M. Aly","doi":"10.1109/ICCTA32607.2013.9529577","DOIUrl":"https://doi.org/10.1109/ICCTA32607.2013.9529577","url":null,"abstract":"This paper presents a quality of service based on three parameters, number of wavelengths, wavelength conversion capability, and number of slots per burst. An analytical model for calculating Burst Loss Rate (BLR) is presented for each parameter. We also show the influence of the three parameters on the BLR.","PeriodicalId":405465,"journal":{"name":"2013 23rd International Conference on Computer Theory and Applications (ICCTA)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125107269","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
Intelligent Student Advisory Framework 智能学生咨询框架
2013 23rd International Conference on Computer Theory and Applications (ICCTA) Pub Date : 2013-10-29 DOI: 10.1109/ICCTA32607.2013.9529516
W. Aly, O. Hegazy, H. Rashad
{"title":"Intelligent Student Advisory Framework","authors":"W. Aly, O. Hegazy, H. Rashad","doi":"10.1109/ICCTA32607.2013.9529516","DOIUrl":"https://doi.org/10.1109/ICCTA32607.2013.9529516","url":null,"abstract":"Improving students and higher education institutes is an important task to increase the quality of the whole higher educational system. In our research, we propose to use educational data mining techniques to discover hidden knowledge from the available educational data. An \"Intelligent Student Advisory Framework\" is proposed that uses classification and clustering techniques. This system can be used to guide the first year university students to the more suitable educational track. The classification phase will predict the department which is most likely to be chosen by student and the clustering phase will recommend departments to student by showing his expected rate of success for each department, this recommendation is aiming to decrease the high rate of academic failure for first year students. Our approach is tested using a real case study from the Cairo Higher Institute for Engineering, Computer Science, and Management using data collected for a period within 12 years from 2000 – 2012.","PeriodicalId":405465,"journal":{"name":"2013 23rd International Conference on Computer Theory and Applications (ICCTA)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132228523","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: 0
Online English to Arabic Translation Enhancement by Domain Data Adaptation 基于领域数据适应的在线英语到阿拉伯语翻译增强
2013 23rd International Conference on Computer Theory and Applications (ICCTA) Pub Date : 2013-10-29 DOI: 10.1109/ICCTA32607.2013.9529753
Khaled Ibrahim Mohamed, M. Rashwan, M. Fakhr, Mostafa Abdel Azim
{"title":"Online English to Arabic Translation Enhancement by Domain Data Adaptation","authors":"Khaled Ibrahim Mohamed, M. Rashwan, M. Fakhr, Mostafa Abdel Azim","doi":"10.1109/ICCTA32607.2013.9529753","DOIUrl":"https://doi.org/10.1109/ICCTA32607.2013.9529753","url":null,"abstract":"the aim of this paper is to introduce a new technique that enhances online translation from English to Arabic for a specific domain. This enhancement is achieved by training a new \"Arabic online engine translation\" to \"Arabic manual translation\" model that corrects common errors in the online translation. This paper focuses on two popular online translation engines which are Google and Bing. The translation enhancement is done in two steps. First step is training the translation of each online engine on Moses toolkit separately to generate translation model that corrects the output of online translation engine, the result of this step is corrected Google translation and corrected Bing translation which is better than the original translation. Second step is choosing one sentence from the two corrected sentence using a language model trained on the manual Arabic translation which gives more enhancement than step 1.Two metrics are used to evaluate proposed model enhancement, BLEU Score (Bilingual Evaluation Understudy) and NIST Score (National Institute of Standards and Technology). The proposed model has obtained 32.44% BLEU Score over Google and 40.91% BLEU Score over Bing for LDC2004T14 dataset, 18.08% BLEU Score over Google and 26.55% BLEU Score over Bing for Distinct LDC2004T14 dataset, and 10.69% BLEU Score over Google and 9.94% BLEU Score over Bing for MEDAR dataset.","PeriodicalId":405465,"journal":{"name":"2013 23rd International Conference on Computer Theory and Applications (ICCTA)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130140435","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: 0
Blind Source Separation with Wavelet Based ICA Technique Using Kurtosis 基于峰度分析的小波盲源分离
2013 23rd International Conference on Computer Theory and Applications (ICCTA) Pub Date : 2013-10-29 DOI: 10.1109/ICCTA32607.2013.9529537
M. Y. Abbass, S. A. Abdelwahab, S. Diab, Bassiony. M. Salam, El-Sayed M. El-Rabaie, F. El-Samie, S. S. Haggag
{"title":"Blind Source Separation with Wavelet Based ICA Technique Using Kurtosis","authors":"M. Y. Abbass, S. A. Abdelwahab, S. Diab, Bassiony. M. Salam, El-Sayed M. El-Rabaie, F. El-Samie, S. S. Haggag","doi":"10.1109/ICCTA32607.2013.9529537","DOIUrl":"https://doi.org/10.1109/ICCTA32607.2013.9529537","url":null,"abstract":"This paper deals with the problem of blind separation of digital images from mixtures. It proposes a wavelet -based Independent Component Analysis (ICA) method using Kurtosis for blind image source separation. In this method, the observations are transformed into an adequate representation using wavelet packet decomposition and a Kurtosis criterion. The simulation results of performance measures show a considerable improvement when compared to the FastICA. The Signal-to-Noise Ratio (SNR), Peak Signal-to-Noise Ratio (PSNR), Root Mean Square Error (RMSE) and Segmental Signal-to-Noise Ratio (SNRseg) are used to evaluate the quality of the separated images.","PeriodicalId":405465,"journal":{"name":"2013 23rd International Conference on Computer Theory and Applications (ICCTA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120956964","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: 1
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