Pub Date : 2011-10-20DOI: 10.1109/ICET.2011.6048497
Farhan Sahito, A. Latif, W. Slany
Twitter is one of the most popular and well known micro blogging platforms. Its usage in all walks of life as a short message service makes it a highly valuable and trendy asset of today's web. But the knowledge and content delivered by Twitter explicitly or implicitly as short messages remains mostly unstructured and hidden for machine usage. In this paper, we have addressed the aforementioned problems by using the Semantic Web and Linked Data technologies. We explore an integrated approach by building a proof of concept framework, which uses Semantic Web technologies to triplify and link the unstructured content of tweets with Linked Data clouds as structured data. We are of the view that this proof of concept framework will be helpful in investigation of case studies like opinion mining, trend analysis in various settings and more importantly will bring the Social Web closer to the Semantic Web. In future we will extend our proposed framework in the domain of terrorism informatics.
{"title":"Weaving Twitter stream into Linked Data a proof of concept framework","authors":"Farhan Sahito, A. Latif, W. Slany","doi":"10.1109/ICET.2011.6048497","DOIUrl":"https://doi.org/10.1109/ICET.2011.6048497","url":null,"abstract":"Twitter is one of the most popular and well known micro blogging platforms. Its usage in all walks of life as a short message service makes it a highly valuable and trendy asset of today's web. But the knowledge and content delivered by Twitter explicitly or implicitly as short messages remains mostly unstructured and hidden for machine usage. In this paper, we have addressed the aforementioned problems by using the Semantic Web and Linked Data technologies. We explore an integrated approach by building a proof of concept framework, which uses Semantic Web technologies to triplify and link the unstructured content of tweets with Linked Data clouds as structured data. We are of the view that this proof of concept framework will be helpful in investigation of case studies like opinion mining, trend analysis in various settings and more importantly will bring the Social Web closer to the Semantic Web. In future we will extend our proposed framework in the domain of terrorism informatics.","PeriodicalId":167049,"journal":{"name":"2011 7th International Conference on Emerging Technologies","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116780093","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}
Pub Date : 2011-10-20DOI: 10.1109/ICET.2011.6048474
Yousra Javed, M. Khan
In this paper, we explore the use of textons for image texture classification in the context of population density estimation. For this purpose, we have taken high resolution Google Earth images and classified them into four classes i.e. high population density, medium population density, low population density and unpopulated (land/vegetation) areas. A texton dictionary is first built by clustering the responses obtained after convolving the images with a set of filters i.e. “Filter banks”. Using this dictionary, texton histograms are calculated for each class's texture. These histograms are used as training models. Classification of a test image proceeds by mapping this image to a texton histogram and comparing this histogram to the learnt models. To obtain a quantitative assessment of the efficiency of the proposed method, we compare the results of the proposed method with those obtained through supervised classification based on texture extracted by Gray Level Co-occurrence Matrix (GLCM). The results demonstrate that texton based classification achieves better results.
{"title":"Image texture classification using textons","authors":"Yousra Javed, M. Khan","doi":"10.1109/ICET.2011.6048474","DOIUrl":"https://doi.org/10.1109/ICET.2011.6048474","url":null,"abstract":"In this paper, we explore the use of textons for image texture classification in the context of population density estimation. For this purpose, we have taken high resolution Google Earth images and classified them into four classes i.e. high population density, medium population density, low population density and unpopulated (land/vegetation) areas. A texton dictionary is first built by clustering the responses obtained after convolving the images with a set of filters i.e. “Filter banks”. Using this dictionary, texton histograms are calculated for each class's texture. These histograms are used as training models. Classification of a test image proceeds by mapping this image to a texton histogram and comparing this histogram to the learnt models. To obtain a quantitative assessment of the efficiency of the proposed method, we compare the results of the proposed method with those obtained through supervised classification based on texture extracted by Gray Level Co-occurrence Matrix (GLCM). The results demonstrate that texton based classification achieves better results.","PeriodicalId":167049,"journal":{"name":"2011 7th International Conference on Emerging Technologies","volume":"375 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116520818","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}
Pub Date : 2011-10-20DOI: 10.1109/ICET.2011.6048491
S. Rehman, M. A. Khalid
Several design challenges of a low pass continuous time delta sigma modulator (LP DSM), to be used in switched mode transmitter architecture, have been identified. MATLAB simulations and modulation schemes for LP DSM have been presented. Various analog issues, mainly concerned with loop filter design, are discussed. Finally a highly efficient switched mode transmitter architecture using delta-sigma modulation and class-D amplifier is implemented. The transmitter architecture is operated at 200MHz.
{"title":"Switched mode transmitter architecture using low pass delta sigma modulator","authors":"S. Rehman, M. A. Khalid","doi":"10.1109/ICET.2011.6048491","DOIUrl":"https://doi.org/10.1109/ICET.2011.6048491","url":null,"abstract":"Several design challenges of a low pass continuous time delta sigma modulator (LP DSM), to be used in switched mode transmitter architecture, have been identified. MATLAB simulations and modulation schemes for LP DSM have been presented. Various analog issues, mainly concerned with loop filter design, are discussed. Finally a highly efficient switched mode transmitter architecture using delta-sigma modulation and class-D amplifier is implemented. The transmitter architecture is operated at 200MHz.","PeriodicalId":167049,"journal":{"name":"2011 7th International Conference on Emerging Technologies","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130554324","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}
Pub Date : 2011-10-20DOI: 10.1109/ICET.2011.6048456
M. A. Khan, T. Khan, S. Khan
Diffusion filtering techniques are mostly used to enhance the ridge structure of a noisy fingerprint image. In these filtering techniques the measurement of local orientation is needed. The diffusion tensor used in these techniques reflects the local image structure, as in a structure tensor same set of eigenvectors are used. To control the diffusion along the direction of high coherence special Eigenvalues are chosen. It works well in enhancing the ridges but, it takes orientation angles implicitly by using local image structure (derivatives). As we know that the derivatives have undesirable property of enhancing noise which makes the process of finding the correct orientation more difficult. This gives a further motivation for the improved orientation field calculated by some more reliable mean, which can overcome such difficulties. Therefore, in this work a Multi-Scale DDFB is used which adaptively change the local neighborhood size with the image local contrast and feature width. Experimental results show that the proposed algorithm is noise robust and is more suitable for feature localization as compare to other coherence enhancement diffusion algorithms.
{"title":"Coherence enhancement diffusion using Multi-Scale DFB","authors":"M. A. Khan, T. Khan, S. Khan","doi":"10.1109/ICET.2011.6048456","DOIUrl":"https://doi.org/10.1109/ICET.2011.6048456","url":null,"abstract":"Diffusion filtering techniques are mostly used to enhance the ridge structure of a noisy fingerprint image. In these filtering techniques the measurement of local orientation is needed. The diffusion tensor used in these techniques reflects the local image structure, as in a structure tensor same set of eigenvectors are used. To control the diffusion along the direction of high coherence special Eigenvalues are chosen. It works well in enhancing the ridges but, it takes orientation angles implicitly by using local image structure (derivatives). As we know that the derivatives have undesirable property of enhancing noise which makes the process of finding the correct orientation more difficult. This gives a further motivation for the improved orientation field calculated by some more reliable mean, which can overcome such difficulties. Therefore, in this work a Multi-Scale DDFB is used which adaptively change the local neighborhood size with the image local contrast and feature width. Experimental results show that the proposed algorithm is noise robust and is more suitable for feature localization as compare to other coherence enhancement diffusion algorithms.","PeriodicalId":167049,"journal":{"name":"2011 7th International Conference on Emerging Technologies","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132722396","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}
Pub Date : 2011-10-20DOI: 10.1109/ICET.2011.6048445
Shazia Kareem, Imran Sarwar Bajwa
Since last two decades, telehealth has been emerged into an expansion of telemedicine. A telehealth system provides the curative care and preventive care. In telehealth, patient's data is sent by email to a physician or a medical expert for diagnosis and medical prescription. Telehealth system can be used as real time method or store forward method. However, in perspective of developing countries like Pakistan, real-time telehealth is not feasible due to its high cost. Whereas, the store and forward method based telehealth can be a cost-effect solution. It has been identified that a major problem with store-and-forward method is long time-factor that can be longer to 48 hours in certain cases. The situation may become more verse if patient is in serious condition and requires immediate medication. To address this issue a concept of virtual telehealth is proposed in this paper. We have incorporated a clinical decision support system to reply the patients' query locally. The presented solution can make telehealth more financially feasible, technically implemental in developing countries like Pakistan.
{"title":"A virtual telehealth framework: Applications and technical considerations","authors":"Shazia Kareem, Imran Sarwar Bajwa","doi":"10.1109/ICET.2011.6048445","DOIUrl":"https://doi.org/10.1109/ICET.2011.6048445","url":null,"abstract":"Since last two decades, telehealth has been emerged into an expansion of telemedicine. A telehealth system provides the curative care and preventive care. In telehealth, patient's data is sent by email to a physician or a medical expert for diagnosis and medical prescription. Telehealth system can be used as real time method or store forward method. However, in perspective of developing countries like Pakistan, real-time telehealth is not feasible due to its high cost. Whereas, the store and forward method based telehealth can be a cost-effect solution. It has been identified that a major problem with store-and-forward method is long time-factor that can be longer to 48 hours in certain cases. The situation may become more verse if patient is in serious condition and requires immediate medication. To address this issue a concept of virtual telehealth is proposed in this paper. We have incorporated a clinical decision support system to reply the patients' query locally. The presented solution can make telehealth more financially feasible, technically implemental in developing countries like Pakistan.","PeriodicalId":167049,"journal":{"name":"2011 7th International Conference on Emerging Technologies","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115054548","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}
Pub Date : 2011-10-20DOI: 10.1109/ICET.2011.6048444
S. A. Khan, M. S. Khan, M. F. Shafique, I. Shoaib
This paper presents a novel compact broadband circularly polarized slot antenna fed by a co-planar waveguide (CPW), suitable for use in WLAN and RFID applications. The antenna is only 20 × 24 mm in size. Measured impedance bandwidth (VSWR < 2) at center frequency of 5.8 GHz is 24% and the 3 dB axial-ratio (AR) bandwidth is 3.1%. The antenna has an omnidirectional radiation pattern with a maximum gain of −0.5 dB.
{"title":"A low-profile CPW-fed broadband antenna for WLAN and RFID applications","authors":"S. A. Khan, M. S. Khan, M. F. Shafique, I. Shoaib","doi":"10.1109/ICET.2011.6048444","DOIUrl":"https://doi.org/10.1109/ICET.2011.6048444","url":null,"abstract":"This paper presents a novel compact broadband circularly polarized slot antenna fed by a co-planar waveguide (CPW), suitable for use in WLAN and RFID applications. The antenna is only 20 × 24 mm in size. Measured impedance bandwidth (VSWR < 2) at center frequency of 5.8 GHz is 24% and the 3 dB axial-ratio (AR) bandwidth is 3.1%. The antenna has an omnidirectional radiation pattern with a maximum gain of −0.5 dB.","PeriodicalId":167049,"journal":{"name":"2011 7th International Conference on Emerging Technologies","volume":"6 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128437762","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}
Pub Date : 2011-10-20DOI: 10.1109/ICET.2011.6048464
Sharifullah Khan, Amjad Usman, Rabia Irfan, Amir Hayat
Institutions increasingly recognize the need to develop digital repositories for organizing and managing their intellectual output to enhance scholarly communication. An institutional repository (IR) enhances opportunities for efficient use of existing research material and improved learning experiences, and encourages collaboration within and between different disciplines and groups. Installing IR software is not a major issue, but the challenge lies in tailoring the software and setting up services, policies, and procedures to make it work effectively in an institutional environment. The purpose of this paper is to document SEECS IR system's experience in developing the institutional repository. The contribution of this paper is to provide a case study which will be useful for other academic institutions in developing countries who want to develop their own institutional repositories.
{"title":"DSpace@SEECS: SEECS institutional repository system","authors":"Sharifullah Khan, Amjad Usman, Rabia Irfan, Amir Hayat","doi":"10.1109/ICET.2011.6048464","DOIUrl":"https://doi.org/10.1109/ICET.2011.6048464","url":null,"abstract":"Institutions increasingly recognize the need to develop digital repositories for organizing and managing their intellectual output to enhance scholarly communication. An institutional repository (IR) enhances opportunities for efficient use of existing research material and improved learning experiences, and encourages collaboration within and between different disciplines and groups. Installing IR software is not a major issue, but the challenge lies in tailoring the software and setting up services, policies, and procedures to make it work effectively in an institutional environment. The purpose of this paper is to document SEECS IR system's experience in developing the institutional repository. The contribution of this paper is to provide a case study which will be useful for other academic institutions in developing countries who want to develop their own institutional repositories.","PeriodicalId":167049,"journal":{"name":"2011 7th International Conference on Emerging Technologies","volume":"516 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116224315","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}
Pub Date : 2011-10-20DOI: 10.1109/ICET.2011.6048471
Iqbal Qasim, Jin-Woo Jeong, Sharifullah Khan, Dong-Ho Lee
Semantic Web uses domain ontology to bridge the gap among the members of a domain through minimization of conceptual and terminological incompatibilities. However, several barriers must be overcome before domain ontology becomes a practical and useful tool. One important issue is identification and selection of domain concepts for domain ontology learning when several hundreds or even thousands of terms are extracted and available from relevant text documents shared among the members of a domain. We present a novel domain concept acquisition and selection approach for ontology learning that uses affinity propagation algorithm, which takes as input semantic and structural similarity between pairs of extracted terms called data points. Real-valued messages are passed between data points (terms) until high quality set of exemplars (concepts) and cluster iteratively emerges. All exemplars will be considered as domain concepts for learning domain ontologies. Our empirical results show that our approach achieves high precision and recall in selection of domain concepts using less number of iterations.
{"title":"Exploiting affinity propagation for automatic acquisition of domain concept in ontology learning","authors":"Iqbal Qasim, Jin-Woo Jeong, Sharifullah Khan, Dong-Ho Lee","doi":"10.1109/ICET.2011.6048471","DOIUrl":"https://doi.org/10.1109/ICET.2011.6048471","url":null,"abstract":"Semantic Web uses domain ontology to bridge the gap among the members of a domain through minimization of conceptual and terminological incompatibilities. However, several barriers must be overcome before domain ontology becomes a practical and useful tool. One important issue is identification and selection of domain concepts for domain ontology learning when several hundreds or even thousands of terms are extracted and available from relevant text documents shared among the members of a domain. We present a novel domain concept acquisition and selection approach for ontology learning that uses affinity propagation algorithm, which takes as input semantic and structural similarity between pairs of extracted terms called data points. Real-valued messages are passed between data points (terms) until high quality set of exemplars (concepts) and cluster iteratively emerges. All exemplars will be considered as domain concepts for learning domain ontologies. Our empirical results show that our approach achieves high precision and recall in selection of domain concepts using less number of iterations.","PeriodicalId":167049,"journal":{"name":"2011 7th International Conference on Emerging Technologies","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123284393","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}
Pub Date : 2011-10-20DOI: 10.1109/ICET.2011.6048465
Affan Hasan Khan, O. Khalid, A. Mumtaz, M. K. Islam
This paper presents a simple technique for generation of Impulse Radio Ultra-wideband pulses in optical domain. This system can transmit the data in Giga-bits-per-second range for 32 users across a 1 km optical fiber link using Dense Wavelength Division Multiplexing (DWDM). A multiple access technique using Direct Sequence Ultra-wideband (DS UWB) pulses has also been presented. Moreover, we have analyzed the relationship between the input data rate and signal bandwidth and also studied the effect of pulse width on the bandwidth of a signal.
{"title":"DWDM based system for optical generation and transmission of impulse radio UWB signals","authors":"Affan Hasan Khan, O. Khalid, A. Mumtaz, M. K. Islam","doi":"10.1109/ICET.2011.6048465","DOIUrl":"https://doi.org/10.1109/ICET.2011.6048465","url":null,"abstract":"This paper presents a simple technique for generation of Impulse Radio Ultra-wideband pulses in optical domain. This system can transmit the data in Giga-bits-per-second range for 32 users across a 1 km optical fiber link using Dense Wavelength Division Multiplexing (DWDM). A multiple access technique using Direct Sequence Ultra-wideband (DS UWB) pulses has also been presented. Moreover, we have analyzed the relationship between the input data rate and signal bandwidth and also studied the effect of pulse width on the bandwidth of a signal.","PeriodicalId":167049,"journal":{"name":"2011 7th International Conference on Emerging Technologies","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124815210","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}
Pub Date : 2011-10-20DOI: 10.1109/ICET.2011.6048451
Sarmad Ullah Khan, Rafiullah Khan
Wireless Sensor Networks (WSNs) consists of a large number of small and resource constrained devices. Due to their low cost, flexibility and self-organizing nature, these devices are used in various applications such as home and industrial automation, environmental and habitat monitoring and even in more security sensitive military applications in which security of the information in terms of both snooping and tampering is very important. Such applications introduce various security challenges to these resource constrained devices. To cope with these challenges, a proper authentication and key establishment is required. In this paper, we present an effective authentication and key establishment scheme for the heterogeneous sensor networks. The proposed solution is tested using the OMNET++ simulator and results show that it provides better network connectivity, consume less memory and has better network resilience against attacks.
{"title":"An efficient authentication and key establishment scheme for heterogeneous sensor networks","authors":"Sarmad Ullah Khan, Rafiullah Khan","doi":"10.1109/ICET.2011.6048451","DOIUrl":"https://doi.org/10.1109/ICET.2011.6048451","url":null,"abstract":"Wireless Sensor Networks (WSNs) consists of a large number of small and resource constrained devices. Due to their low cost, flexibility and self-organizing nature, these devices are used in various applications such as home and industrial automation, environmental and habitat monitoring and even in more security sensitive military applications in which security of the information in terms of both snooping and tampering is very important. Such applications introduce various security challenges to these resource constrained devices. To cope with these challenges, a proper authentication and key establishment is required. In this paper, we present an effective authentication and key establishment scheme for the heterogeneous sensor networks. The proposed solution is tested using the OMNET++ simulator and results show that it provides better network connectivity, consume less memory and has better network resilience against attacks.","PeriodicalId":167049,"journal":{"name":"2011 7th International Conference on Emerging Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130015549","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}
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