Pub Date : 2011-12-01DOI: 10.1109/NWESP.2011.6088184
J. Márquez, J. E. Córcoles, A. Quintanilla
Nowadays, there are a huge number of Spatial Data Infrastructures (SDIs) offering public spatial services. For this reason, it is very difficult for a user to know what spatial service could satisfy his/her needs. The SDI community now demands an approach for integrating SDI services and relating them with semantic features. In order to contribute to a solution, in this paper we propose an approach based on IR (Information Retrieval) for building a search engine which helps users to find geographical information, available on the Internet, about different concepts located in a particular administrative division. In our approach, a novel algorithm updates an inverted index, taking into account semantic relationships between concepts which are obtained from ontologies. Furthermore, results are sorted by conceptual and geographic criteria fitting the user query.
{"title":"Scoring results in a geospatial services search engine according to geographic and semantic awareness","authors":"J. Márquez, J. E. Córcoles, A. Quintanilla","doi":"10.1109/NWESP.2011.6088184","DOIUrl":"https://doi.org/10.1109/NWESP.2011.6088184","url":null,"abstract":"Nowadays, there are a huge number of Spatial Data Infrastructures (SDIs) offering public spatial services. For this reason, it is very difficult for a user to know what spatial service could satisfy his/her needs. The SDI community now demands an approach for integrating SDI services and relating them with semantic features. In order to contribute to a solution, in this paper we propose an approach based on IR (Information Retrieval) for building a search engine which helps users to find geographical information, available on the Internet, about different concepts located in a particular administrative division. In our approach, a novel algorithm updates an inverted index, taking into account semantic relationships between concepts which are obtained from ontologies. Furthermore, results are sorted by conceptual and geographic criteria fitting the user query.","PeriodicalId":271670,"journal":{"name":"2011 7th International Conference on Next Generation Web Services Practices","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122883756","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 : 2011-12-01DOI: 10.1109/NWESP.2011.6088172
Francisco Huertas, Antonio Navarro
Nowadays, integration of e-learning platforms has become a key issue in e-learning. In order to facilitate this integration, most e-learning platforms depict their functionality in terms of web services. However, the availability of these services in every platform is very heterogeneous. In addition, every platform follows its own philosophy when designing its services. This paper analyses three of the most successful e-learning platforms (Blackboard, Moodle and Sakai), identifying their web services, and comparing their readiness for the development of a virtual campus based on these services. The goal of the paper is to facilitate the integration of these platforms in an information technology infrastructure.
{"title":"Web services availability in e-learning platforms","authors":"Francisco Huertas, Antonio Navarro","doi":"10.1109/NWESP.2011.6088172","DOIUrl":"https://doi.org/10.1109/NWESP.2011.6088172","url":null,"abstract":"Nowadays, integration of e-learning platforms has become a key issue in e-learning. In order to facilitate this integration, most e-learning platforms depict their functionality in terms of web services. However, the availability of these services in every platform is very heterogeneous. In addition, every platform follows its own philosophy when designing its services. This paper analyses three of the most successful e-learning platforms (Blackboard, Moodle and Sakai), identifying their web services, and comparing their readiness for the development of a virtual campus based on these services. The goal of the paper is to facilitate the integration of these platforms in an information technology infrastructure.","PeriodicalId":271670,"journal":{"name":"2011 7th International Conference on Next Generation Web Services Practices","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129704047","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 : 2011-12-01DOI: 10.1109/NWESP.2011.6088164
Lluís Ferrer-Arnau, V. Parisi-Baradad, R. Reig-Bolaño, P. Martí-Puig, A. Manjabacas
The interpolation of contour pixels, with splines, of an order greater than or equal to two, usually causes oscillations that do not fit the original shape. To overcome this we propose using a least squares filter before carrying out the interpolation. This results in a good compromise between the smoothness of the curve and the best fit to the original contour. Representing the contour with a continuous model instead of a discrete model has many advantages for carrying out calculations, as for example the contour curvature, which involves first and second order derivatives, as well as operations that are not well defined in the discrete world. We also present a new way of calculating FIR approximations to filters based on B-splines. The great advantage of this approximation in the case of least squares filter is that it does not need downsampling. This property makes it invariant to translations, and this is very important in classification tasks.
{"title":"Efficient representation of contours using splines implemented with FIR filters","authors":"Lluís Ferrer-Arnau, V. Parisi-Baradad, R. Reig-Bolaño, P. Martí-Puig, A. Manjabacas","doi":"10.1109/NWESP.2011.6088164","DOIUrl":"https://doi.org/10.1109/NWESP.2011.6088164","url":null,"abstract":"The interpolation of contour pixels, with splines, of an order greater than or equal to two, usually causes oscillations that do not fit the original shape. To overcome this we propose using a least squares filter before carrying out the interpolation. This results in a good compromise between the smoothness of the curve and the best fit to the original contour. Representing the contour with a continuous model instead of a discrete model has many advantages for carrying out calculations, as for example the contour curvature, which involves first and second order derivatives, as well as operations that are not well defined in the discrete world. We also present a new way of calculating FIR approximations to filters based on B-splines. The great advantage of this approximation in the case of least squares filter is that it does not need downsampling. This property makes it invariant to translations, and this is very important in classification tasks.","PeriodicalId":271670,"journal":{"name":"2011 7th International Conference on Next Generation Web Services Practices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129551011","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 : 2011-12-01DOI: 10.1109/NWESP.2011.6088231
G. Baxter, T. Connolly, M. Stansfield, Carole Gould, N. Tsvetkova, Rumyana Kusheva, B. Stoimenova, Rositsa Penkova, M. Legurska, Neli Dimitrova
This paper explores the concept of Web 2.0 and provides an overview of three types of Web 2.0 tools currently used in education today, namely, wikis, blogs and online forums. The paper also presents the results of a systematic literature review on Web 2.0 in education, the findings of which revealed a lack of Web 2.0 pedagogical models in the literature. This paper makes a contribution to knowledge in the area of Web 2.0 use in education by presenting a Web 2.0 pedagogical model to inform educators of how to apply the learning theories associated with Web 2.0 in the classroom. In addition, the paper presents the findings of a teacher training course based on the Web 2.0 pedagogical model taught through the use of an integrated Web 2.0 platform that was carried out as part of a large-scale evaluation of Web2.0 across Europe.
{"title":"Understanding the pedagogy Web 2.0 supports: The presentation of a Web 2.0 pedagogical model","authors":"G. Baxter, T. Connolly, M. Stansfield, Carole Gould, N. Tsvetkova, Rumyana Kusheva, B. Stoimenova, Rositsa Penkova, M. Legurska, Neli Dimitrova","doi":"10.1109/NWESP.2011.6088231","DOIUrl":"https://doi.org/10.1109/NWESP.2011.6088231","url":null,"abstract":"This paper explores the concept of Web 2.0 and provides an overview of three types of Web 2.0 tools currently used in education today, namely, wikis, blogs and online forums. The paper also presents the results of a systematic literature review on Web 2.0 in education, the findings of which revealed a lack of Web 2.0 pedagogical models in the literature. This paper makes a contribution to knowledge in the area of Web 2.0 use in education by presenting a Web 2.0 pedagogical model to inform educators of how to apply the learning theories associated with Web 2.0 in the classroom. In addition, the paper presents the findings of a teacher training course based on the Web 2.0 pedagogical model taught through the use of an integrated Web 2.0 platform that was carried out as part of a large-scale evaluation of Web2.0 across Europe.","PeriodicalId":271670,"journal":{"name":"2011 7th International Conference on Next Generation Web Services Practices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129113970","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 : 2011-12-01DOI: 10.1109/NWESP.2011.6088230
G. Baxter, T. Connolly, M. Stansfield, N. Tsvetkova, B. Stoimenova
This paper provides an overview on the ‘state of art’ of Web 2.0 use in Higher Education exploring reasons why and how Web 2.0 tools, namely, wikis, blogs and online forums are being used in educational settings. This paper acknowledges that there is an apparent lack of evidence in the Web 2.0 literature regarding the steps taken by educators to introduce Web 2.0 in the classroom. A Web 2.0 implementation framework is presented which provides educators with a set of practical steps to follow when adopting the use of Web 2.0 for the first time. This framework can be tested and developed in educational settings based on the experience of other educators.
{"title":"Introducing Web 2.0 in education: A structured approach adopting a Web 2.0 implementation framework","authors":"G. Baxter, T. Connolly, M. Stansfield, N. Tsvetkova, B. Stoimenova","doi":"10.1109/NWESP.2011.6088230","DOIUrl":"https://doi.org/10.1109/NWESP.2011.6088230","url":null,"abstract":"This paper provides an overview on the ‘state of art’ of Web 2.0 use in Higher Education exploring reasons why and how Web 2.0 tools, namely, wikis, blogs and online forums are being used in educational settings. This paper acknowledges that there is an apparent lack of evidence in the Web 2.0 literature regarding the steps taken by educators to introduce Web 2.0 in the classroom. A Web 2.0 implementation framework is presented which provides educators with a set of practical steps to follow when adopting the use of Web 2.0 for the first time. This framework can be tested and developed in educational settings based on the experience of other educators.","PeriodicalId":271670,"journal":{"name":"2011 7th International Conference on Next Generation Web Services Practices","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123939832","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 : 2011-12-01DOI: 10.1109/NWESP.2011.6088151
C. Baladrón, J. Aguiar, L. Calavia, B. Carro, A. Cadenas, R. de las Heras, A. Sánchez-Esguevillas
Mobility is probably the most important ongoing revolution in the information society of today. The outstanding achievements made in computing and networking during the last decades (which have been available using personal computers at homes and workplaces) are progressively permeating all aspects of life thanks to the plethora of mobile devices at the disposal of the users, including netbooks, PDAs and smartphones. These are also increasingly intelligent and powerful, allowing for rich user interfaces and complex operations and software. On the other hand, the advance of the Internet has given birth to a converged Web which offers a myriad of different services just with a couple of clicks. However, in order to lower the barriers for accessing these services, a platform for ubiquitous service delivery and management is still required, and a viable alternative is presented along this work.
{"title":"Platform for ubiquitous mobile service composition, management and delivery","authors":"C. Baladrón, J. Aguiar, L. Calavia, B. Carro, A. Cadenas, R. de las Heras, A. Sánchez-Esguevillas","doi":"10.1109/NWESP.2011.6088151","DOIUrl":"https://doi.org/10.1109/NWESP.2011.6088151","url":null,"abstract":"Mobility is probably the most important ongoing revolution in the information society of today. The outstanding achievements made in computing and networking during the last decades (which have been available using personal computers at homes and workplaces) are progressively permeating all aspects of life thanks to the plethora of mobile devices at the disposal of the users, including netbooks, PDAs and smartphones. These are also increasingly intelligent and powerful, allowing for rich user interfaces and complex operations and software. On the other hand, the advance of the Internet has given birth to a converged Web which offers a myriad of different services just with a couple of clicks. However, in order to lower the barriers for accessing these services, a platform for ubiquitous service delivery and management is still required, and a viable alternative is presented along this work.","PeriodicalId":271670,"journal":{"name":"2011 7th International Conference on Next Generation Web Services Practices","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121413547","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 : 2011-12-01DOI: 10.1109/NWESP.2011.6088174
M. Khouja, C. Juiz, R. Puigjaner, F. Kamoun
The omnipresence of mobile devices has changed the users behaviour. The content present in the Web is created by simple users. Nevertheless, this content is in the cloud and not shared directly from users. This behaviour is a passive one. In this paper, we propose a service architecture which transforms passive users into service providers. This role is acquired in a specific ambient where users share services with each other. Thanks to this collaboration, people can find adequate solutions to a specific problem. A university campus scenario illustrates the functionalities of the service architecture. The proposed solution has a layered structure that integrates Web services with a semantic modelling of the context. This model describes a specific vocabulary to be used when creating or requesting services. The resulting services are organised in groups according to selected criteria.
{"title":"Transforming passive users into service providers via semantic enhanced service oriented architecture","authors":"M. Khouja, C. Juiz, R. Puigjaner, F. Kamoun","doi":"10.1109/NWESP.2011.6088174","DOIUrl":"https://doi.org/10.1109/NWESP.2011.6088174","url":null,"abstract":"The omnipresence of mobile devices has changed the users behaviour. The content present in the Web is created by simple users. Nevertheless, this content is in the cloud and not shared directly from users. This behaviour is a passive one. In this paper, we propose a service architecture which transforms passive users into service providers. This role is acquired in a specific ambient where users share services with each other. Thanks to this collaboration, people can find adequate solutions to a specific problem. A university campus scenario illustrates the functionalities of the service architecture. The proposed solution has a layered structure that integrates Web services with a semantic modelling of the context. This model describes a specific vocabulary to be used when creating or requesting services. The resulting services are organised in groups according to selected criteria.","PeriodicalId":271670,"journal":{"name":"2011 7th International Conference on Next Generation Web Services Practices","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115372127","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 : 2011-12-01DOI: 10.1109/NWESP.2011.6088194
Rim Rekik, I. Kallel
In this paper, we present a quality assessment method and model in order to measure the performance of dynamic institutional websites. This method called Fuzz-web is based on Multiple Criteria Decision Making. Obviously, a phase of selecting appropriate evaluation criteria is necessary for the decision making process. Since the evaluation process is characterized by subjectivity and imprecision, we attempt to address the problem using fuzzy logic as an intelligent technology. Some tests realized on a set of Tunisian and foreign websites allow us to discuss the proposed reduced fuzzy method and then to validate the decision making result.
{"title":"Fuzzy reduced method for evaluating the quality of institutional web sites","authors":"Rim Rekik, I. Kallel","doi":"10.1109/NWESP.2011.6088194","DOIUrl":"https://doi.org/10.1109/NWESP.2011.6088194","url":null,"abstract":"In this paper, we present a quality assessment method and model in order to measure the performance of dynamic institutional websites. This method called Fuzz-web is based on Multiple Criteria Decision Making. Obviously, a phase of selecting appropriate evaluation criteria is necessary for the decision making process. Since the evaluation process is characterized by subjectivity and imprecision, we attempt to address the problem using fuzzy logic as an intelligent technology. Some tests realized on a set of Tunisian and foreign websites allow us to discuss the proposed reduced fuzzy method and then to validate the decision making result.","PeriodicalId":271670,"journal":{"name":"2011 7th International Conference on Next Generation Web Services Practices","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126360328","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 : 2011-12-01DOI: 10.1109/NWESP.2011.6088166
A. Gil, F. D. L. Prieta, S. Rodríguez, Beatriz Martín
In the current educational context there has been a significant increase in learning object repositories (LOR), which are found in large databases available on the hidden web. All the information about these learning objects (LOs) is described in any metadata labeling standard (LOM, Dublin Core, etc). It is necessary to work and develop solutions that provide efficiency in searching for heterogeneous content and finding distributed context. Distributed information retrieval, or federated search, attempts to respond to the problem of information retrieval in the hidden Web. The main aim of a federated search is to develop models and strategies to get the most benefit from these distributed sources. Thus, users perceive the system as a single point of access to information they require, regardless of the number of sources that exist, its location, or its management mechanism. The process is completely transparent to the user, who does not perceive its complexity and therefore treats any of the information retrieved uniformly. This paper describes an architecture that recovers educational content, called AIREH (Architecture for Intelligent Recovery of Educational content in Heterogeneous Environments), which combines the dynamism and flexibility of multi-agent organizations. The proposal uses systems and mechanisms by which agents acquire roles based on the generation and use of dynamic web services.
{"title":"Educational content retrieval based on semantic Web services","authors":"A. Gil, F. D. L. Prieta, S. Rodríguez, Beatriz Martín","doi":"10.1109/NWESP.2011.6088166","DOIUrl":"https://doi.org/10.1109/NWESP.2011.6088166","url":null,"abstract":"In the current educational context there has been a significant increase in learning object repositories (LOR), which are found in large databases available on the hidden web. All the information about these learning objects (LOs) is described in any metadata labeling standard (LOM, Dublin Core, etc). It is necessary to work and develop solutions that provide efficiency in searching for heterogeneous content and finding distributed context. Distributed information retrieval, or federated search, attempts to respond to the problem of information retrieval in the hidden Web. The main aim of a federated search is to develop models and strategies to get the most benefit from these distributed sources. Thus, users perceive the system as a single point of access to information they require, regardless of the number of sources that exist, its location, or its management mechanism. The process is completely transparent to the user, who does not perceive its complexity and therefore treats any of the information retrieved uniformly. This paper describes an architecture that recovers educational content, called AIREH (Architecture for Intelligent Recovery of Educational content in Heterogeneous Environments), which combines the dynamism and flexibility of multi-agent organizations. The proposal uses systems and mechanisms by which agents acquire roles based on the generation and use of dynamic web services.","PeriodicalId":271670,"journal":{"name":"2011 7th International Conference on Next Generation Web Services Practices","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130265409","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 : 2011-12-01DOI: 10.1109/NWESP.2011.6088179
N. Antequera, J. A. López-Ramos
In this work we give some remarks and counter-measures in order to show that the cryptoanalysis presented in [11] on the secure multicast protocol introduced in [8] does not affect significantly its security.
{"title":"Remarks and countermeasures on a cryptoanalysis of a secure multicast protocol","authors":"N. Antequera, J. A. López-Ramos","doi":"10.1109/NWESP.2011.6088179","DOIUrl":"https://doi.org/10.1109/NWESP.2011.6088179","url":null,"abstract":"In this work we give some remarks and counter-measures in order to show that the cryptoanalysis presented in [11] on the secure multicast protocol introduced in [8] does not affect significantly its security.","PeriodicalId":271670,"journal":{"name":"2011 7th International Conference on Next Generation Web Services Practices","volume":"898 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116391743","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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