RDF data can be analyzed with various query languages such as SPARQL. However, due to their nature these query languages do not support fuzzy queries that would allow us to extract a broad range of additional information. In this article we present a new method that transforms the information presented by subject-relationobject relations within RDF data into Activation Patterns. These patterns represent a common model that is the basis for a number of sophisticated analysis methods such as semantic relation analysis, semantic search queries, unsupervised clustering, supervised learning or anomaly detection. In this article, we explain the Activation Patterns concept and apply it to an RDF representation of the well known CIA World Factbook.

Ontology evaluation is an integral and important part of the ontology development process. Errors in ontologies could be catastrophic for the information system based on those ontologies. As per our experiments, the existing ontology evaluation systems were unable to detect many errors (like, circulatory error in class and property hierarchy, common class and property in disjoint decomposition, redundancy of sub class and sub property, redundancy of disjoint relation and disjoint knowledge omission) as defined in the error taxonomy. We have formulated efficient algorithms for the evaluation of these and other errors as per the extended error taxonomy. These algorithms are implemented (named as OntEval) and the implementations are used to evaluate well-known ontologies including Gene Ontology (GO), WordNet Ontology and OntoSem. The ontologies are indexed using a variant of already proposed scheme Ontrel. A number of errors and warnings in these ontologies have been discovered using the OntEval. We have also reported the performance of our implementation, OntEval.

The massive growth in ontology development has opened new research challenges such as ontology management, search and retrieval for the entire semantic web community. These results in many recent developments, like OntoKhoj, Swoogle, OntoSearch2, that facilitate tasks user have to perform. These semantic web portals mainly treat ontologies as plain texts and use the traditional text classification algorithms for classifying ontologies in directories and assigning predefined labels rather than using the semantic knowledge hidden within the ontologies. These approaches suffer from many types of classification problems and lack of accuracy, especially in the case of overlapping ontologies that share common vocabularies. In this paper, we define an ontology classification problem and categorize it into many sub-problems. We present a new ontological methodology for the classification of web ontologies, which has been guided by the requirements of the emerging Semantic Web applications and by the lessons learnt from previous systems. The proposed framework, OntClassifire, is tested on 34 ontologies with a certain degree of overlapping domain, and effectiveness of the ontological mechanism is verified. It benefits the construction, maintenance or expansion of ontology directories on the semantic web that help to focus on the crawling and improving the quality of search for the software agents and people. We conclude that the use of a context specific knowledge hidden in the structure of ontologies gives more accurate results for the ontology classification.

Spatial Hypertext Wiki (ShyWiki) is a wiki which represents knowledge using notes that are spatially distributed in wiki pages and have visual characteristics such as colour, size, or font type. The use of spatial and visual characteristics in wikis is important to improve human comprehension, creation and organization of knowledge. Another important capability in wikis is to allow machines to process knowledge. Wikis that formally structure knowledge for this purpose are called semantic wikis. This paper describes how ShyWiki can make use of spatial hypertext in order to be a semantic wiki. ShyWiki can represent knowledge at different levels of formality. Users of ShyWiki can annotate the content and represent semantic relations without being experts of semantic web data description languages. The spatial hypertext features make it suitable for users to represent unstructured knowledge and implicit graphic relations among concepts. In addition, semantic web and spatial hypertext features are combined to represent structured knowledge. The semantic web features of ShyWiki improve navigation and publish the wiki knowledge as RDF resources, including the implicit relations that are analyzed using a spatial parser.

Nowadays, one of the main issues discussed at the Community level is represented by the mobility of students and workers across Europe. During the last years, in order to deal with the above picture, several initiatives have been carried out: one of them is the definition of the European Qualification Framework (EQF), a common architecture for the description of qualifications. At the same time, several research activities were established with the aim of finding how semantic technologies could be exploited for qualifications comparison in the field of human resources acquisition. In this paper, the EQF specifications are taken into account and they are applied in a practical scenario to develop a ranking algorithm for the comparison of qualifications expressed in terms of knowledge, skill and competence concepts, potentially aimed at supporting European employers during the recruiting phase.

The user experience of any software or website consists of elements from the conceptual to the concrete level. These elements of user experience assist in the design and development of user interfaces. On the other hand, ontologies provide a framework for computable representation of user interface elements and underlying data. This paper discusses strategies of introducing ontologies at different user interface layers adapted from user experience elements. These layers range from abstract levels (e.g. User needs/Application Objectives) to concrete levels (e.g. Application User Interface) in terms of data representation. The proposed ontological framework enables device independent, semi-automated GUI construction which we will demonstrate at a personal information management example.

Semantic-based technologies have been steadily increasing their relevance in recent years in both the research world and business world. Considering this, the present article discusses the process of design and implementation of a competency management system in information and communication technologies domain utilizing the latest Semantic Web tools and technologies including D2RQ server, TopBraid Composer, OWL 2, SPARQL, SPARQL Rules and common human resources related public vocabularies. In particular, the paper discusses the process of building individual and enterprise competence models in a form of ontology database, as well as different ways of meaningful search and retrieval of expertise data on the Semantic Web. The ontological knowledge base aims at storing the extracted and integrated competences from structured, as well as unstructured sources. By using the illustrative case study of deployment of such a system in the Human Resources sector at the Mihajlo Pupin Institute, this paper shows an example of new approaches to data integration and information management. The proposed approach extends the functionalities of existing enterprise information systems and offers possibilities for development of future Internet services. This allows organizations to express their core competences and talents in a standardized, machine processable and understandable format, and hence, facilitates their integration in the European Research Area and beyond.

Patient information in health care systems mostly consists of textual data, and free text in particular makes up a significant amount of it. Information retrieval systems that concentrate on these text types have to deal with the different challenges these medical free texts pose to achieve an acceptable performance. This paper describes the evaluation of four different types of information retrieval strategies: keyword search, search performed by a medical domain expert, a semantic based information retrieval tool, and a purely statistical information retrieval method. The different methods are evaluated and compared with respect to its appliance in medical health care systems.

Retrieving information or discovering knowledge from a well organized data center in general is requested to be familiar with its schema, structure, and architecture, which against the inherent concept and characteristics of cloud environment. An effective approach to retrieve desired information or to extract useful knowledge is an important issue in the emerging information/knowledge cloud. In this paper, we propose an ontology-based agent generation framework for information retrieval in a flexible, transparent, and easy way on cloud environment. While user submitting a flat-text based request for retrieving information on a cloud environment, the request will be automatically deduced by a Reasoning Agent (RA) based on predefined ontology and reasoning rule, and then be translated to a Mobile Information Retrieving Agent Description File (MIRADF) that is formatted in a proposed Mobile Agent Description Language (MADF). A generating agent, named MIRA-GA, is also implemented to generate a MIRA according to the MIRADF. We also design and implement a prototype to integrate these agents and show an interesting example to demonstrate the feasibility of the architecture.

Project monitoring plays a crucial role in project management, which is a part of every stage of a project's life-cycle. Nevertheless, along with the increasing ratio of outsourcing in many companies' strategic plans, project monitoring has been challenged by geographically dispersed project teams and culturally diverse team members. Furthermore, because of the lack of a uniform standard, data exchange between various project monitoring software becomes an impossible mission. These factors together lead to the issue of ambiguity in project monitoring processes. Ontology is a form of knowledge representation with the purpose of disambiguation. Consequently, in this paper, we propose the framework of an ontology-based real-time project monitoring system (ORPSM), in order to, by means of ontologies, solve the ambiguity issue in project monitoring processes caused by multiple factors. The framework incorporates a series of ontologies for knowledge capture, storage, sharing and term disambiguation in project monitoring processes, and a series of metrics for assisting management of project organizations to better monitor projects. We propose to configure the ORPMS framework in a cloud environment, aiming at providing the project monitoring service to geographically distributed and dynamic project members with great flexibility, scalability and security. A case study is conducted on a prototype of the ORPMS in order to evaluate the framework.

Data warehouses integrate and aggregate data from various sources to support decision making within an enterprise. Usually, it is assumed that data are extracted from operational databases used by the enterprise. Cloud warehousing relaxes this view permitting data sources to be located anywhere on the world-wide web in a so-called "cloud", which is understood as a registry of services. Thus, we need a model of dataintensive web services, for which we adopt the view of the recently introduced model of abstract state services (AS2s). An AS2 combines a hidden database layer with an operation-equipped view layer, and thus provides an abstraction of web services that can be made available for use by other systems. In this paper we extend this model to an abstract model of clouds by means of an ontology for service description. The ontology can be specified using description logics, where the ABox contains the set of services, and the TBox can be queried to find suitable services. Consequently, AS2 composition can be used for cloud warehousing.

Vehicular Networks, including Vehicular Adhoc Networks (VANETs) and Vehicular Sensor Networks (VSNs), stimulate a brand new variety of services, ranging from driver safety services, traffic information and warnings regarding traffic jams and accidents, to providing weather or road condition, parking availability, and advertisement. 3G networks and sophisticated Intelligent Transportation Systems (ITS), including deploying costly roadside base stations, can indeed be used to offer such services, but these come with a cost, both at network and hardware levels. In this paper we introduce Cooperation as a service (CaaS): A novel architecture that will allow providing a set of services for free and without any additional infrastructure, by taking advantage of Vehicle-to-Vehicle communications. CaaS uses a hybrid publish/subscribe mechanism where the driver (or subscriber) expresses his interests regarding a service (or a set of services) and where cars having subscribed to the same service will cooperate to provide the subscriber with the necessary information regarding the service he subscribed to, by publishing this information in the network. CaaS structures the network into clusters, and uses Content Based Routing (CBR) for intra-cluster communications and geographic routing for inter-cluster communications.

Twitter, personnellement j'adore. J'ai connu ses balbutiements, il y a dix ans, nous n'étions que quelques blogueurs et journalistes, c'était un formidable lieu d'informations et de déconnes gentilles... à l'époque, il n'y avait pas de trolls aigris et...

Malgré un télescopage plus que dommageable avec l’affaire Ferrand – il aurait déjà dû démissionner – François Bayrou a annoncé un train de mesures visant à moraliser visant à encadrer les élus. Et bien celles-ci vont dans le bon sens. Bien sûr, on pourra...

On semble s'acheminer vers une vague En Marche de forte magnitude aux prochaines Législatives. Si Les Républicains espèrent limiter la casse, c'est à dire avec un perte d'une centaine de députés. L'enjeu de LR, c'est l'après avec en ligne de mire, un...

Non, Fred, t’es pas tout seul… toi et tes copains abstentionnistes, vous êtes 27.125.535… soit 57,36% des français en âge de voter pour les législatives. Une paille quoi. Ce chiffre affolant permet à certains de dire que, les nouveaux députés ne sont...

Avec la fin du communisme, nous devions assister à la fin de l’histoire mais les crises économiques en ont décidé autrement. Et ce d’autant plus que depuis, les problématiques de déclassement social, territorial et de questionnement « identitaires » n’ont...

C’était il y a 3 ans et pourtant le souvenir de cette soirée est toujours là, pesante et iréelle. Exceptionnellement nous étions chez nous ce vendredi, en famille nous regardions la télévision. Si je n’ai pas souvenir du programme, je me souviens encore...

Une étude récente dévoile que que près de la moitié des maires ne souhaitent pas se représenter lors des prochaines municipales de 2020. Incontestablement, le mandat de maire est probablement le plus difficile, il revêt tant d’aspects et ce quelque soit...

Il y a quelques jours, je parlais d’émergence d’un nouveau monde bipolaire. Le hasard des écrits faisant parfois bien les choses, depuis quelques jours est apparu dans notre vocabulaire, les Gilets Jaunes. Il ne se passe plus un jour, sans qu’on essaye...

On est enfin à ce jour qui magnifie la contradiction de nos sociétés. A lors qu’on nous met en garde tous les jours contre l’obsolescence programmée de notre unique planète, notre société de sur-consommation nous intime l’ordre de consommer jusqu’à plus...

Cette semaine, le Président Emmanel Macron est monté en première ligne pour tenter de désamorcer ce malaise qui peut mettre en péril la suite de son quinquennat. A en juger par les dernières enquêtes, cette intervention semble avoir fait long feu. Le...

J’ai commencé à bloguer en 2006, je ne compte plus le nombre de billets que j’ai pu faire sur la montée inexorable de l’abstention élection après élection. On a pu croire que la montée en puissance des réseaux sociaux aller faire émerger une démocratie...

Les images sont « belles », elles tournent en boucle sur les réseaux sociaux, elles tendent à vouloir accréditer la thèse d’un mouvement composé d’ultra des deux extrêmes. La chose devrait donc être entendue, pour les « bons » militants ; rassurons-nous...

Si la question de l’hystérisation des réseaux sociaux ne date pas des Gilets Jaunes, nulle doute qu’elle revient sur le devant de la scène. Je ne parle même pas des théories du complot lié à ce mouvement. Pour ma part, les choses sont claires, il est...

Comme on devait s’y attendre, l’attentat de Strasbourg n’a pas manqué, s’il en était encore besoin, de charrier son lot de rumeurs complotistes. Un regard rapide sur les réseaux sociaux de toute nature suffit à se rendre compte de ce triste phénomène....

Petite nouveauté : j'ouvre mon blog afin de faire vivre le débat et certains auront remarqué le changement d'intitulé. Désormais, Il y aura un nouveau contributeur en la personne de Vincent Grenier qui est entrepreneur et membre du Conseil National du...

L'actualité aidant, une personne sur twitter a exhumé un vieux billet que j'avais écrit en Mai 2011. A l'époque, je parlais du Parti Socialiste... sans fausse modestie, j'avais vu plutôt juste... Aujourd'hui, on peut déjà parler d'un autre "parti" mais...

Mine de rien les Gilets jaunes, quoiqu'on en pense, on réussit à faire bouger les lignes sur des éléments qu'on nous disait impossible jusqu'à présent. Au delà de certaines applications qui peuvent être laissées au débat, en matière de pouvoir d'achat,...

Depuis quelques années, la théorie du grand remplacement, popularisée par Michel Houellbecq dans Soumissions ou par un Eric Zemmour, a fait son chemin dans les arcanes les moins visibles du Net. Pourtant, le danger n’est pas là, loin s’en faut, il est...

L'évènement est là, l'écrivain maudit et adulé - qu'on mérite - sort son dernier ouvrage, son nouveau chef d'oeuvre. Houellebecq a ça de bien, c'est qu'il permettra une nouvelle hystérisation du débat littéraire. Génie pour les uns, faussaire pour les...

Présent sur le Net depuis deux bonnes décennies, j’ai pu constater l’évolution des arnaques pour le simple quidam webonautes que nous sommes. Au départ, on a connu le fameux pishing via des mails grossièrement rédigés avec des entêtes de tel ou tel fournisseur...

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C’est entendu pour Emmanuel Macron, les violences auraient pour cause les Réseaux Sociaux. Je cite « il y a un changement anthropologique de nos sociétés qui vient des réseaux sociaux ». J’avoue que ce type de raisonnement aussi simplistes me laisse pantois....

Je n’avais pas vu venir cette analyse de haut vol de l’ancien Président de la République et l’ancien Premier Secrétaire du Pati Socialiste, je cite « La reconquête des classes populaires est donc, pour la gauche, un impératif démocratique ». Je salue...

L’émoi de l’incendie de Notre Dame de Paris dépasse largement nos frontières hexagonales. Et plus intéressant encore, il transcende nos croyances, nos cultures, il touche au plus de profond de l’être humain. A cet égard, j’ai également été touché par...

Des dizaines de morts dans le sud-ouest du Pakistan après un attentat suicide

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L’info du jour | 10 novembre - Matin

Tensions à l'Université Lyon-3 : la classe politique condamne les attaques contre Yaël Braun-Pivet

L’info du jour | 10 novembre - Mi-journée

La Russie lance un "nombre record" de drones sur l'Ukraine. Barrage de drones ukrainiens sur Moscou

Avec l'Arizona, Donald Trump a désormais remporté la totalité des sept États clés

Des frappes de Tsahal ont fait plus de 50 morts au Liban et à Gaza, tirs de roquettes sur Israël

La COP29 en Azerbaïdjan : une première pour les talibans

L’info du jour | 10 novembre - Soir

La police arrête des dizaines de personnes à Amsterdam après l'interdiction de manifestations

Netanyahu s’est entretenu 3 fois avec Trump depuis sa réélection à propos de la "menace iranienne"