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Articles les plus récents


Genesis of a “Diophantine equation” in Arabic mathematics.

We intend in this paper to outline one part of the number theory genesis relatively to the equation : a square plus/minus a number equals a square focusing on the Arabic mathematicians’ works, like, for example, those of al-Khazin, Ibn al- Laith, al-Karaji, al-Baghdadi and al-Khallat. We will then briefly describe the occidental tradition relative to his subject threw the works of Fibonacci, Fermat, Frenecle, Euler, and others.



MAMCTA Multi-Agent Model for Counter Terrorism Actions

Today, the world is affected by a new concept of war called terrorism. As plans to face conventional enemies have become unusual against terrorism, there are a necessity for innovative concepts and technologies. In order to support units, we aim to upgrade the capability of leaders structuring their choices. In this paper, we offer a multi-agent architecture for the planning of actions against terrorist attacks. It is distinguished by decisive policy responses and methodical procedures for managing the situation, as well as by the flexibility to adapt a contingency scenario. We describe the relationship between actors during a terrorist attack in order to establish the best possible distribution of units to neutralize the enemy.



The dominant interest of structuring environmental scanning systems : mapping of 20 years of research in Tunisia.

Through this study, we propose an overview of two decades of research on Strategic Environmental Scanning (ESS) and competitive intelligence (CI) in Tunisia. A particular attention is given to Scientific and Technical Scanning (STS) as part of SES practices and as a strong support to R&D activity and trigger of innovation. The objective of this work is to fill a gap faced by academic researchers interested in issues related to this field of research. The scarcity of meta-analyses within the literature review and retrospective studies could be an obstacle to the cumulative nature of the research and the capitalization of actionable knowledge from the various investigations.



Cartographic Visualization of personalized Scientific Alerts

Different diffusion tools within collaborative networks provide to researchers more and recent information. In this paper, we focus on the scientific quality of diffused information and discuss the implications of this tendency for scientific performance. We propose a qualitative scientific watch system enriched by an alerts’ personalization and cartographic visualization tools. The proposed watch system is based on scientific quality evaluation in its different parts. Scientific quality evaluation is made by the mean of scientometric indicators to select qualitative new publications to diffuse to the researchers. The integration of personalization tool helps researchers on identifying qualitative information which corresponds to their needs. Moreover, the cartographic visualization provides to the researchers the possibility of analyzing and choosing more quickly interesting and useful alerts.



Meta-heuristic algorithms for the multi-item transshipment problem

Differential Evolution (DE) and the Particle Swarm Optimization (PSO) are two evolutionary algorithms that confirmed their efficiency in resolving complex problems. In this paper, we intend to adopt these algorithms to resolve a complex inventory management problem, known in the literature by the transshipment problem. This problem concerns network of collaborative retailers selling items and they collaborate by exchanging items between them. The transshipment problem consists in deriving the optimal replenishment quantity, for each retailer, while a transshipment policy is adopted. A huge body of literature works has addressed this problem where several configurations are investigated. A few of them has addressed the multiitem and the multi-location configuration because of its complexity. We focus in this paper on this complex configuration and we resolve it by the PSO and DE algorithms. Secondly, we compare between the performances of these algorithms according to a set of criteria. Thirdly, we analysis the impact of the studiedtransshipment parameters on the inventory system performance measures.



Optimized Sentiments analysis Approach, Based On Aspects, Attention and Subjectivity notions For Textual Business Intelligence

This article presents the results obtained in applying an innovative and optimized approach to textual semantic analysis in the service of decision-making. Significant improvements have been made in the existing procedures of sentiment and recommendation analysis, and in opinions mining, to enable better-motivated decisions and benefit from big data. These improvements concerned, especially, the support of the notions of aspects, attention and subjectivity to lighten the treatments, well adapted in the context of big data. The results obtained show the interesting contribution of the approach to the specific field of business intelligence (BI) relative to user behaviors analysis.



Classification of Hate Speech Using Deep Neural Networks

In the Internet age where the information flow has grown rapidly, there is an increase in digital communication. The spread of hatred that was previously limited to verbal communications has quickly moved over the Internet. Social media and community forums that allow people to discuss and express their opinions are becoming platforms for the dissemination of hate messages. Many countries have developed laws to prevent online hate speech. They hold the companies that run the social media responsible for their failure to remove hate speech. However, manual analysis of hate speech on online platforms is infeasible due to the huge amount of data as it is expensive and time consuming. Thus, it is important to automatically process the online user contents to detect and remove hate speech from online media. Through this work, we propose some solutions for the problem of automatic detection of hate messages. We perform hate speech classification using embedding representations of words and Deep Neural Networks (DNN). We compare fastText and BERT (Bidirectional Encoder Representations from Transformers) embedding representations of words. Furthermore, we perform classification using two approaches : (a) using word embeddings as input to Support Vector Machines (SVM) and DNN-based classifiers ; (b) fine-tuning of a BERT model for classification using a task-specific corpus. Among the DNNbased classifiers, we compare Convolutional Neural Networks (CNN), Bi-Directional Long Short Term Memory (Bi- LSTM) and Convolutional Recurrent Neural Network (CRNN). The classification was performed on a Twitter dataset using three classes : hate, offensive and neither classes. Compared to the feature-based approaches, the BERT fine-tuning approach obtained a relative improvement of 16% in terms of macro-average F1-measure and 5.3% in terms of weighted F1-measure.



From Data and Information Processing to Knowledge Organization : Architectures, Models and Systems

In this « special issue » on the topic « From Data and Information Processing to Knowledge Organization : Architectures, Models and Systems », seven (07) selected communications have been reviewed by peers in the OCTA Multi-Conference (unifying 4 scientific projects : SIIE, ISKO-Maghreb, CITED and TBMS) in program committees. We consider that this set of proposals, enriched in circumstance of this special issue by its authors at our request, are an excellent engine of current scientific ideas and challenges in the domain concerned in ISKO-Maghreb Society.



Les thèses électroniques : vers un nouveau workflow

L’intérêt de la diffusion des thèses en ligne fait actuellement l’objet d’un consensus dans les universités et autres institutions académiques et de recherche à travers le monde. Ce consensus est né, tout d’abord, du constat que le support papier ne permet plus une diffusion satisfaisante des travaux et résultats de recherche. Aussi, le réseau internet a permis d’ouvrir de très grandes perspectives en termes de souplesse et de rapidité de production et de diffusion des résultats académiques.
Nous essayerons à travers ce travail de mettre l’accent sur les expériences internationales et nationales en la matière et insister sur les enjeux d’une politique de diffusion des thèses en accès libre en insistant sur les prescriptions techniqueset méthodologiques en faveurs d’un workflow efficace des thèses électroniques algérienne.



Les Classements des Universités Et Centres De Recherche : brève présentation et contexte national

Les classements des universités sont de plus en plus prisés depuis quelques années, et sont devenu incontournables pour plusieurs institutions gouvernementales, medias, universités. Ces derniers représentent un outil important d’évaluation de la qualité dans le secteur de l’enseignement supérieur. Plusieurs classements ont vu le jour ces dernières années, et se sont élargis et diversifiés par rapport aux différents critères et indicateurs de recherche, pour prendre une dimension mondiale. Dans cette étude, une description de quelques classements internationaux est donnée à savoir le classement de Shanghai, le classement du QS World University Rankings, le classement Webometrics, et enfin le classement SCImago Institutions Rankings. Ensuite, nous proposons une modeste tentative d’analyse des résultats obtenus par les établissements Algériens de l’enseignement supérieur dans le classement Webometrics, ainsi que le Scimago. Enfin, un ensemble de recommandations est suggéré afin d’améliorer le rang des institutions nationales dans les différents classements.


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